/* roulang page: index */
:root {
            --clr-bg: #0a0a14;
            --clr-bg-alt: #111122;
            --clr-bg-card: #16162a;
            --clr-bg-card-hover: #1c1c35;
            --clr-nav: #060610;
            --clr-neon: #FF8C00;
            --clr-neon-bright: #FFAA2B;
            --clr-neon-soft: #ff7b1c;
            --clr-accent: #FF6B2C;
            --clr-gold: #FFB800;
            --clr-text: #e8e8f0;
            --clr-text-strong: #ffffff;
            --clr-text-muted: #9a9ab5;
            --clr-text-dim: #6b6b80;
            --clr-border: #1e1e3a;
            --clr-border-light: #2a2a48;
            --clr-shadow-card: 0 4px 24px rgba(0, 0, 0, 0.45);
            --clr-shadow-neon: 0 0 20px rgba(255, 140, 0, 0.3), 0 0 50px rgba(255, 140, 0, 0.1);
            --clr-shadow-neon-strong: 0 0 30px rgba(255, 140, 0, 0.5), 0 0 70px rgba(255, 140, 0, 0.2);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-full: 50%;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
            --transition-fast: 0.18s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-display: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--clr-neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--clr-text-strong);
            font-family: var(--font-display);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }
        ul,
        ol {
            padding-left: 1.2rem;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--clr-nav);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, transparent, var(--clr-neon), var(--clr-accent), var(--clr-neon), transparent) 1;
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.7);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--clr-neon), var(--clr-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            color: #0a0a14;
            box-shadow: var(--clr-shadow-neon);
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--clr-text-strong);
            letter-spacing: 0.03em;
            font-family: var(--font-display);
            text-shadow: 0 0 12px rgba(255, 140, 0, 0.35);
        }
        .logo-text span {
            color: var(--clr-neon);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.15rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav li a {
            display: block;
            padding: 0.55rem 1.1rem;
            border-radius: 6px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--clr-text-muted);
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            position: relative;
        }
        .main-nav li a:hover {
            color: var(--clr-text-strong);
            background: rgba(255, 140, 0, 0.06);
            text-shadow: 0 0 8px rgba(255, 170, 43, 0.4);
        }
        .main-nav li a.active {
            color: var(--clr-neon-bright);
            background: rgba(255, 140, 0, 0.1);
            text-shadow: 0 0 14px rgba(255, 170, 43, 0.6);
            box-shadow: inset 0 -2px 0 var(--clr-neon);
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 0.5rem 1.4rem;
            border-radius: 25px;
            font-weight: 700;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--clr-neon), var(--clr-accent));
            color: #0a0a14 !important;
            letter-spacing: 0.03em;
            box-shadow: var(--clr-shadow-neon);
            transition: all var(--transition-base);
            white-space: nowrap;
            margin-left: 0.6rem;
        }
        .nav-cta-btn:hover {
            box-shadow: var(--clr-shadow-neon-strong);
            transform: translateY(-1px);
            color: #0a0a14 !important;
            filter: brightness(1.1);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--clr-text-strong);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem;
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .mobile-toggle:hover {
            color: var(--clr-neon);
        }

        /* Mobile Nav */
        @media (max-width: 960px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--clr-nav);
                flex-direction: column;
                padding: 1rem 1.5rem 1.2rem;
                border-bottom: 2px solid var(--clr-border);
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.8);
                gap: 0.3rem;
                z-index: 999;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav li a {
                padding: 0.7rem 1rem;
                font-size: 1rem;
                border-radius: 8px;
            }
            .nav-cta-btn {
                margin-left: 0;
                text-align: center;
                width: 100%;
                margin-top: 0.5rem;
            }
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            background: linear-gradient(180deg, #0a0a18 0%, #0f0f24 40%, #111128 100%);
            overflow: hidden;
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            z-index: 0;
            filter: brightness(0.7) saturate(0.8);
        }
        .hero-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 140, 0, 0.12) 0%, transparent 70%);
            top: -10%;
            right: -5%;
            z-index: 0;
            pointer-events: none;
        }
        .hero-glow2 {
            position: absolute;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 44, 0.1) 0%, transparent 70%);
            bottom: -8%;
            left: -3%;
            z-index: 0;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            padding: 3rem 0;
        }
        .hero-badge {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            border-radius: 25px;
            background: rgba(255, 140, 0, 0.12);
            border: 1px solid rgba(255, 140, 0, 0.3);
            color: var(--clr-neon-bright);
            font-weight: 700;
            font-size: 0.88rem;
            letter-spacing: 0.04em;
            margin-bottom: 1.5rem;
            text-shadow: 0 0 6px rgba(255, 170, 43, 0.3);
        }
        .hero-title {
            font-size: clamp(2.2rem, 4.5vw, 3.4rem);
            font-weight: 900;
            letter-spacing: 0.02em;
            margin-bottom: 0.8rem;
            line-height: 1.2;
            text-shadow: 0 0 30px rgba(255, 140, 0, 0.25);
        }
        .hero-title .highlight {
            color: var(--clr-neon);
            text-shadow: 0 0 20px rgba(255, 140, 0, 0.5);
        }
        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--clr-text-muted);
            margin-bottom: 1.8rem;
            max-width: 600px;
            line-height: 1.6;
        }
        .hero-desc {
            font-size: 1rem;
            color: var(--clr-text-dim);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .btn-primary {
            display: inline-block;
            padding: 0.75rem 2rem;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.03em;
            background: linear-gradient(135deg, var(--clr-neon), var(--clr-accent));
            color: #0a0a14;
            box-shadow: var(--clr-shadow-neon);
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            text-align: center;
        }
        .btn-primary:hover {
            box-shadow: var(--clr-shadow-neon-strong);
            transform: translateY(-2px);
            color: #0a0a14;
            filter: brightness(1.08);
        }
        .btn-outline {
            display: inline-block;
            padding: 0.75rem 2rem;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.03em;
            background: transparent;
            color: var(--clr-text-strong);
            border: 2px solid var(--clr-border-light);
            transition: all var(--transition-base);
            cursor: pointer;
            text-align: center;
        }
        .btn-outline:hover {
            border-color: var(--clr-neon);
            color: var(--clr-neon);
            box-shadow: 0 0 16px rgba(255, 140, 0, 0.2);
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--spacing-2xl) 0;
        }
        .section-dark {
            background: var(--clr-bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }
        .section-label {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            background: rgba(255, 140, 0, 0.08);
            color: var(--clr-neon-bright);
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 0.8rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 0.6rem;
        }
        .section-desc {
            color: var(--clr-text-muted);
            font-size: 1.05rem;
            max-width: 650px;
            margin: 0 auto;
        }

        /* ========== STATS CARDS ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            border-radius: 0 0 4px 4px;
            background: linear-gradient(90deg, transparent, var(--clr-neon), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .stat-card:hover {
            border-color: var(--clr-border-light);
            box-shadow: var(--clr-shadow-card);
            transform: translateY(-3px);
            background: var(--clr-bg-card-hover);
        }
        .stat-card:hover::before {
            opacity: 1;
        }
        .stat-icon {
            font-size: 2rem;
            color: var(--clr-neon);
            margin-bottom: 0.8rem;
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--clr-text-strong);
            font-family: var(--font-display);
            letter-spacing: 0.02em;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            margin-top: 0.3rem;
        }

        /* ========== CATEGORY GRID ========== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .cat-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: block;
            color: inherit;
            position: relative;
        }
        .cat-card:hover {
            border-color: var(--clr-neon);
            box-shadow: var(--clr-shadow-card), 0 0 20px rgba(255, 140, 0, 0.08);
            transform: translateY(-4px);
            color: inherit;
        }
        .cat-card-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
            display: block;
        }
        .cat-card-body {
            padding: 1.2rem 1.3rem 1.4rem;
        }
        .cat-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--clr-text-strong);
        }
        .cat-card-desc {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.5;
        }
        .cat-card-arrow {
            display: inline-block;
            margin-top: 0.7rem;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--clr-neon);
            transition: transform var(--transition-fast);
        }
        .cat-card:hover .cat-card-arrow {
            transform: translateX(4px);
        }

        /* ========== ADVANTAGE CARDS ========== */
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .adv-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.4rem;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
        }
        .adv-card:hover {
            border-color: var(--clr-neon);
            box-shadow: var(--clr-shadow-card);
            transform: translateY(-3px);
            background: var(--clr-bg-card-hover);
        }
        .adv-icon-circle {
            width: 58px;
            height: 58px;
            border-radius: var(--radius-full);
            background: rgba(255, 140, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.5rem;
            color: var(--clr-neon);
            transition: all var(--transition-base);
        }
        .adv-card:hover .adv-icon-circle {
            background: rgba(255, 140, 0, 0.2);
            box-shadow: 0 0 20px rgba(255, 140, 0, 0.25);
        }
        .adv-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .adv-card p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== BRAND STORY ========== */
        .story-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .story-img-wrap {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--clr-shadow-card);
            position: relative;
        }
        .story-img-wrap img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }
        .story-img-glow {
            position: absolute;
            inset: 0;
            border-radius: var(--radius-xl);
            box-shadow: inset 0 0 40px rgba(255, 140, 0, 0.08);
            pointer-events: none;
        }
        .story-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .story-text p {
            color: var(--clr-text-muted);
            line-height: 1.85;
            font-size: 0.98rem;
            margin-bottom: 0.8rem;
        }
        .story-highlight {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            border-radius: 20px;
            background: rgba(255, 140, 0, 0.08);
            color: var(--clr-neon-bright);
            font-weight: 700;
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }

        /* ========== SERVICE / FOCUS ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .service-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .service-card:hover {
            border-color: var(--clr-neon);
            box-shadow: var(--clr-shadow-card);
            transform: translateY(-3px);
            background: var(--clr-bg-card-hover);
        }
        .service-card .s-icon {
            font-size: 2rem;
            color: var(--clr-neon);
        }
        .service-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== TESTIMONIALS ========== */
        .testi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .testi-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 1.6rem 1.5rem;
            transition: all var(--transition-base);
        }
        .testi-card:hover {
            border-color: var(--clr-border-light);
            box-shadow: var(--clr-shadow-card);
        }
        .testi-stars {
            color: var(--clr-gold);
            font-size: 0.85rem;
            margin-bottom: 0.8rem;
            letter-spacing: 0.05em;
        }
        .testi-text {
            font-size: 0.93rem;
            color: var(--clr-text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
            font-style: italic;
        }
        .testi-author {
            font-weight: 700;
            color: var(--clr-text-strong);
            font-size: 0.9rem;
        }
        .testi-role {
            font-size: 0.78rem;
            color: var(--clr-text-dim);
        }

        /* ========== PARTNERS ========== */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 2.5rem 3rem;
        }
        .partner-item {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--clr-text-dim);
            letter-spacing: 0.04em;
            transition: color var(--transition-fast);
            text-align: center;
        }
        .partner-item:hover {
            color: var(--clr-neon);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--clr-border-light);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            color: var(--clr-text-strong);
            font-weight: 700;
            font-size: 1rem;
            padding: 1.1rem 1.4rem;
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color var(--transition-fast);
            font-family: inherit;
        }
        .faq-question:hover {
            color: var(--clr-neon);
        }
        .faq-icon {
            font-size: 0.8rem;
            color: var(--clr-neon);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 1.4rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.4rem 1.2rem;
        }
        .faq-answer p {
            margin: 0;
            color: var(--clr-text-muted);
            font-size: 0.92rem;
            line-height: 1.75;
        }

        /* ========== NEWS ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--clr-neon);
            box-shadow: var(--clr-shadow-card);
            transform: translateY(-3px);
        }
        .news-card-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .news-card-body {
            padding: 1.2rem 1.4rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-date {
            font-size: 0.78rem;
            color: var(--clr-text-dim);
            margin-bottom: 0.4rem;
            letter-spacing: 0.03em;
        }
        .news-card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 0.8rem;
        }
        .news-more {
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--clr-neon);
            align-self: flex-start;
            transition: transform var(--transition-fast);
        }
        .news-card:hover .news-more {
            transform: translateX(3px);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(180deg, #13132a 0%, #0f0f22 100%);
            border-top: 1px solid var(--clr-border);
            border-bottom: 1px solid var(--clr-border);
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2rem);
            font-weight: 800;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: var(--clr-text-muted);
            font-size: 1.05rem;
            max-width: 550px;
            margin: 0 auto 2rem;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--clr-nav);
            border-top: 1px solid var(--clr-border);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo-text {
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--clr-text-dim);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--clr-text-strong);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--clr-text-dim);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--clr-neon);
        }
        .footer-bottom {
            border-top: 1px solid var(--clr-border);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.82rem;
            color: var(--clr-text-dim);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .story-block {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .adv-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .cat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .testi-grid {
                grid-template-columns: 1fr;
            }
            .hero-section {
                min-height: 480px;
            }
            .section {
                padding: var(--spacing-xl) 0;
            }
            .partners-row {
                gap: 1.5rem 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .adv-grid {
                grid-template-columns: 1fr;
                gap: 0.8rem;
            }
            .cat-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .testi-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hero-btns {
                flex-direction: column;
                width: 100%;
            }
            .hero-btns a,
            .hero-btns button {
                width: 100%;
                text-align: center;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .container-custom {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #D4A843;
            --color-primary-light: #E8C56D;
            --color-primary-glow: rgba(212, 168, 67, 0.55);
            --color-primary-soft: rgba(212, 168, 67, 0.12);
            --color-secondary: #1a1a2e;
            --color-secondary-light: #222240;
            --color-bg-dark: #0d0d1a;
            --color-bg-section: #f8f7f4;
            --color-bg-white: #ffffff;
            --color-bg-card: #fdfdfc;
            --color-text: #2c2c2c;
            --color-text-light: #6b6b6b;
            --color-text-lighter: #999;
            --color-text-on-dark: #e8e8ec;
            --color-text-on-dark-muted: #a0a0b0;
            --color-border: #e5e5e0;
            --color-border-light: #f0f0eb;
            --color-nav-bg: #0a0a16;
            --color-nav-border: #1e1e36;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 26px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.14);
            --shadow-glow: 0 0 32px rgba(212, 168, 67, 0.35);
            --shadow-neon: 0 0 18px rgba(212, 168, 67, 0.5), 0 0 42px rgba(212, 168, 67, 0.2);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --nav-height: 66px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.72;
            color: var(--color-text);
            background-color: var(--color-bg-white);
            min-width: 320px;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 0.6em;
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-secondary);
        }

        h2 {
            font-size: 2.1rem;
            letter-spacing: -0.02em;
        }
        h3 {
            font-size: 1.45rem;
        }
        h4 {
            font-size: 1.2rem;
        }

        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-nav-bg);
            border-bottom: 1px solid var(--color-nav-border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03), 0 4px 20px rgba(0, 0, 0, 0.35);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo-text {
            font-family: var(--font-heading);
            font-size: 1.55rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--color-primary);
            text-shadow: 0 0 14px var(--color-primary-glow);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .main-nav li a {
            display: inline-block;
            padding: 8px 15px;
            border-radius: 6px;
            font-size: 0.94rem;
            font-weight: 500;
            color: #c5c5d2;
            transition: all var(--transition-normal);
            white-space: nowrap;
            position: relative;
        }
        .main-nav li a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.05);
        }
        .main-nav li a.active {
            color: var(--color-primary);
            font-weight: 700;
            text-shadow: 0 0 14px var(--color-primary-glow);
            background: rgba(212, 168, 67, 0.08);
            box-shadow: inset 0 -2px 0 var(--color-primary);
        }
        .nav-cta-btn {
            background: var(--color-primary) !important;
            color: #1a1a2e !important;
            font-weight: 700 !important;
            padding: 9px 20px !important;
            border-radius: 22px !important;
            margin-left: 6px;
            box-shadow: 0 0 14px var(--color-primary-glow);
            transition: all var(--transition-normal) !important;
        }
        .nav-cta-btn:hover {
            background: var(--color-primary-light) !important;
            box-shadow: var(--shadow-neon) !important;
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            padding: 4px 8px;
            cursor: pointer;
            line-height: 1;
        }

        @media (max-width: 1024px) {
            .mobile-menu-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--color-nav-bg);
                flex-direction: column;
                padding: 12px 20px;
                gap: 2px;
                border-bottom: 2px solid var(--color-nav-border);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
                z-index: 999;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav li a {
                display: block;
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: 8px;
            }
            .nav-cta-btn {
                margin-left: 0;
                text-align: center;
                margin-top: 6px;
            }
        }
        @media (max-width: 520px) {
            .logo-text {
                font-size: 1.3rem;
            }
            .header-inner {
                padding: 0 14px;
            }
            .container-custom {
                padding: 0 14px;
            }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-row {
            background: var(--color-bg-section);
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border-light);
        }
        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--color-text-light);
            flex-wrap: wrap;
        }
        .breadcrumb-inner a {
            color: var(--color-primary);
            font-weight: 500;
            transition: color var(--transition-fast);
        }
        .breadcrumb-inner a:hover {
            color: #b8902f;
            text-decoration: underline;
        }
        .breadcrumb-sep {
            color: #ccc;
            font-size: 0.75rem;
        }
        .breadcrumb-current {
            color: var(--color-text);
            font-weight: 600;
        }

        /* ========== Banner ========== */
        .page-banner {
            position: relative;
            background: var(--color-secondary);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 22, 0.88) 0%, rgba(20, 20, 44, 0.78) 50%, rgba(10, 10, 22, 0.9) 100%);
            z-index: 1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-primary-light), var(--color-primary), transparent);
            z-index: 2;
            opacity: 0.8;
        }
        .banner-content {
            position: relative;
            z-index: 3;
            padding: 50px 0;
            color: #fff;
            max-width: 760px;
        }
        .banner-content .banner-badge {
            display: inline-block;
            background: var(--color-primary);
            color: #1a1a2e;
            font-weight: 700;
            font-size: 0.85rem;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .banner-content h1 {
            font-size: 2.8rem;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: -0.03em;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
        }
        .banner-content h1 span {
            color: var(--color-primary-light);
            text-shadow: 0 0 20px var(--color-primary-glow);
        }
        .banner-content .banner-desc {
            font-size: 1.1rem;
            color: #d5d5e2;
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 620px;
        }

        @media (max-width: 768px) {
            .page-banner {
                min-height: 260px;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content .banner-desc {
                font-size: 1rem;
            }
            .banner-content {
                padding: 36px 0;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 220px;
            }
            .banner-content h1 {
                font-size: 1.65rem;
            }
            .banner-content .banner-desc {
                font-size: 0.9rem;
            }
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: var(--color-bg-section);
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header h2 {
            position: relative;
            display: inline-block;
            padding-bottom: 14px;
        }
        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px;
        }
        .section-header .section-subtitle {
            color: var(--color-text-light);
            font-size: 1rem;
            margin-top: 8px;
        }

        /* ========== 技巧卡片网格 ========== */
        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
            gap: 28px;
        }
        .skill-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-slow);
            display: flex;
            flex-direction: column;
        }
        .skill-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
            border-color: var(--color-primary-soft);
        }
        .skill-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            border-bottom: 2px solid var(--color-border-light);
            transition: opacity var(--transition-normal);
        }
        .skill-card:hover .skill-card-img {
            opacity: 0.88;
        }
        .skill-card-body {
            padding: 22px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .skill-card-body h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
            color: var(--color-secondary);
            line-height: 1.4;
        }
        .skill-card-body .skill-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-soft);
            padding: 3px 10px;
            border-radius: 14px;
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }
        .skill-card-body p {
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .skill-card-body .skill-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--color-primary);
            font-size: 0.9rem;
            transition: gap var(--transition-fast);
        }
        .skill-card-body .skill-link:hover {
            gap: 10px;
            color: #b8902f;
        }
        .skill-card-body .skill-link i {
            font-size: 0.75rem;
        }

        /* ========== 技巧深度区 ========== */
        .deep-dive-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            align-items: center;
            margin-bottom: 48px;
        }
        .deep-dive-block:last-child {
            margin-bottom: 0;
        }
        .deep-dive-block.reverse {
            direction: rtl;
        }
        .deep-dive-block.reverse .deep-dive-text {
            direction: ltr;
        }
        .deep-dive-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            direction: ltr;
        }
        .deep-dive-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
            display: block;
            transition: transform var(--transition-slow);
        }
        .deep-dive-img-wrap:hover img {
            transform: scale(1.04);
        }
        .deep-dive-text h3 {
            font-size: 1.55rem;
            margin-bottom: 12px;
            color: var(--color-secondary);
        }
        .deep-dive-text .highlight-num {
            display: inline-block;
            width: 32px;
            height: 32px;
            line-height: 32px;
            text-align: center;
            background: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .deep-dive-text p {
            color: var(--color-text-light);
            line-height: 1.8;
            margin-bottom: 10px;
        }
        .deep-dive-text ul {
            list-style: none;
            padding: 0;
        }
        .deep-dive-text ul li {
            padding: 6px 0 6px 22px;
            position: relative;
            color: var(--color-text);
            font-size: 0.95rem;
        }
        .deep-dive-text ul li::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 13px;
            width: 7px;
            height: 7px;
            background: var(--color-primary);
            border-radius: 50%;
        }

        @media (max-width: 768px) {
            .deep-dive-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .deep-dive-block.reverse {
                direction: ltr;
            }
            .deep-dive-img-wrap img {
                aspect-ratio: 16/10;
            }
            .skills-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .skills-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .skill-card-img {
                height: 170px;
            }
            .section {
                padding: 40px 0;
            }
            h2 {
                font-size: 1.6rem;
            }
            .deep-dive-text h3 {
                font-size: 1.3rem;
            }
        }

        /* ========== 案例卡片 ========== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }
        .case-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .case-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--color-primary);
            border-radius: 0 3px 3px 0;
            transition: width var(--transition-normal);
        }
        .case-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .case-card:hover::before {
            width: 6px;
        }
        .case-card .case-meta {
            font-size: 0.82rem;
            color: var(--color-text-lighter);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .case-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .case-card p {
            font-size: 0.93rem;
            color: var(--color-text-light);
            line-height: 1.7;
            margin: 0;
        }
        .case-card .case-result {
            display: inline-block;
            margin-top: 10px;
            background: #e8f5e9;
            color: #2e7d32;
            font-weight: 700;
            font-size: 0.85rem;
            padding: 4px 12px;
            border-radius: 12px;
        }

        @media (max-width: 520px) {
            .case-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 步骤流程 ========== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-item {
            text-align: center;
            padding: 28px 18px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition-normal);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-item .step-icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            font-size: 1.5rem;
            margin-bottom: 14px;
            font-weight: 700;
            transition: all var(--transition-normal);
        }
        .step-item:hover .step-icon-circle {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin: 0;
        }

        @media (max-width: 768px) {
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .steps-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            padding: 18px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--color-border-light);
        }
        .faq-question {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-secondary);
            transition: color var(--transition-fast);
            user-select: none;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-primary);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-top: 10px;
        }
        .faq-item:hover .faq-question {
            color: var(--color-primary);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--color-secondary);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 70px 0;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 22, 0.92) 0%, rgba(20, 20, 44, 0.85) 100%);
            z-index: 1;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 660px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-inner p {
            color: #d5d5e2;
            font-size: 1.05rem;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .cta-btn-large {
            display: inline-block;
            background: var(--color-primary);
            color: #1a1a2e;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 14px 40px;
            border-radius: 30px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-slow);
            letter-spacing: 0.03em;
        }
        .cta-btn-large:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
            color: #1a1a2e;
        }
        @media (max-width: 520px) {
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-btn-large {
                padding: 12px 28px;
                font-size: 1rem;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
            padding: 48px 0 20px;
            border-top: 3px solid #1e1e36;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .logo-text {
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .footer-col ul li {
            margin-bottom: 7px;
        }
        .footer-col ul li a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary-light);
        }
        .footer-bottom {
            border-top: 1px solid #1e1e36;
            padding-top: 16px;
            text-align: center;
            font-size: 0.82rem;
            color: #6b6b80;
        }
        .footer-bottom p {
            margin: 0;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ========== 统计数字条 ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }
        .stat-block {
            text-align: center;
            padding: 28px 16px;
            border-right: 1px solid var(--color-border-light);
            transition: background var(--transition-fast);
        }
        .stat-block:last-child {
            border-right: none;
        }
        .stat-block:hover {
            background: #fdfaf3;
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-primary);
            font-family: var(--font-heading);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.88rem;
            color: var(--color-text-light);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                border-radius: var(--radius-md);
            }
            .stat-block:nth-child(2) {
                border-right: none;
            }
            .stat-block {
                border-bottom: 1px solid var(--color-border-light);
            }
            .stat-block:nth-child(3),
            .stat-block:nth-child(4) {
                border-bottom: none;
            }
        }
        @media (max-width: 420px) {
            .stats-strip {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .stat-block {
                padding: 20px 10px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0a0a0f;
            --bg-secondary: #111119;
            --bg-card: #16161f;
            --bg-card-hover: #1c1c28;
            --bg-surface: #1a1a26;
            --text-primary: #e8e8f0;
            --text-secondary: #b0b0c0;
            --text-muted: #7a7a90;
            --text-heading: #f0f0f8;
            --accent-primary: #ff6b35;
            --accent-secondary: #ff8c5a;
            --accent-glow: #ff4d1a;
            --neon-cyan: #00e5ff;
            --neon-purple: #b388ff;
            --neon-green: #69f0ae;
            --neon-amber: #ffc107;
            --border-subtle: #252535;
            --border-medium: #333348;
            --border-glow: #ff6b3555;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 107, 53, 0.15);
            --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --nav-height: 64px;
            --section-gap: 80px;
            --container-max: 1240px;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-base);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            outline: none;
        }

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            color: var(--text-heading);
            line-height: 1.35;
            font-weight: 700;
            margin: 0;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ========== 导航栏 - 暗色霓虹风格 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 10, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--nav-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }

        .site-header .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: nowrap;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-heading);
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: all var(--transition-base);
        }

        .logo-link:hover {
            color: #fff;
        }

        .logo-link .logo-accent {
            color: var(--accent-primary);
            position: relative;
        }

        .logo-link .logo-accent::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--accent-glow);
            border-radius: 3px;
            box-shadow: 0 0 12px var(--accent-glow), 0 0 24px rgba(255, 77, 26, 0.5);
            animation: neonPulse 2s ease-in-out infinite;
        }

        @keyframes neonPulse {
            0%,
            100% {
                box-shadow: 0 0 12px var(--accent-glow), 0 0 24px rgba(255, 77, 26, 0.5);
            }
            50% {
                box-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(255, 77, 26, 0.75);
            }
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .main-nav li a {
            display: block;
            padding: 8px 15px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-base);
            white-space: nowrap;
            position: relative;
        }

        .main-nav li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
            transition: transform var(--transition-base);
            box-shadow: 0 0 8px var(--accent-glow);
        }

        .main-nav li a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .main-nav li a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .main-nav li a.active {
            color: #fff;
            background: rgba(255, 107, 53, 0.12);
            font-weight: 600;
        }

        .main-nav li a.active::after {
            transform: translateX(-50%) scaleX(1);
            box-shadow: 0 0 14px var(--accent-glow), 0 0 28px rgba(255, 77, 26, 0.6);
        }

        .nav-cta-btn {
            display: inline-block !important;
            padding: 9px 20px !important;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-glow)) !important;
            color: #fff !important;
            border-radius: 25px !important;
            font-weight: 600 !important;
            font-size: 0.9rem !important;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
            transition: all var(--transition-smooth) !important;
            letter-spacing: 0.3px;
        }

        .nav-cta-btn:hover {
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.55);
            transform: translateY(-2px);
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary)) !important;
            color: #fff !important;
        }

        .nav-cta-btn::after {
            display: none !important;
        }

        .mobile-toggle {
            display: none;
            background: none;
            color: #fff;
            font-size: 1.6rem;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background var(--transition-base);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ========== 页面 Banner / Hero ========== */
        .page-hero {
            position: relative;
            padding: 90px 0 80px;
            background: var(--bg-secondary);
            overflow: hidden;
            border-bottom: 1px solid var(--border-subtle);
        }

        .page-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            z-index: 0;
            filter: saturate(0.6) brightness(0.6);
        }

        .page-hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 40% 50%, rgba(255, 107, 53, 0.08) 0%, transparent 65%),
                radial-gradient(ellipse at 70% 30%, rgba(0, 229, 255, 0.05) 0%, transparent 55%),
                linear-gradient(180deg, rgba(10, 10, 15, 0.3) 0%, rgba(10, 10, 15, 0.85) 100%);
            z-index: 1;
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
        }

        .page-hero .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(255, 107, 53, 0.15);
            color: var(--accent-secondary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 107, 53, 0.25);
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            color: #fff;
        }

        .page-hero h1 .highlight {
            color: var(--accent-primary);
            position: relative;
        }

        .page-hero .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .page-hero .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 12px;
        }

        .hero-stat-item {
            text-align: center;
        }

        .hero-stat-item .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-primary);
            line-height: 1;
        }

        .hero-stat-item .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 20px;
            background: rgba(255, 107, 53, 0.1);
            color: var(--accent-secondary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1.5px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 750;
            margin-bottom: 12px;
            color: var(--text-heading);
        }

        .section-header .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 550px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ========== 卡片网格 ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
        }

        .cards-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .cards-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .card-pattern {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .card-pattern::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
            border-radius: 3px 3px 0 0;
        }

        .card-pattern:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .card-pattern:hover::before {
            opacity: 1;
        }

        .card-pattern .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            background: rgba(255, 107, 53, 0.1);
            color: var(--accent-primary);
            transition: all var(--transition-base);
        }

        .card-pattern:hover .card-icon {
            background: rgba(255, 107, 53, 0.2);
            box-shadow: 0 0 20px rgba(255, 107, 53, 0.2);
        }

        .card-pattern h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-heading);
        }

        .card-pattern p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
        }

        .card-pattern .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
            flex-wrap: wrap;
        }

        .card-pattern .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 12px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(0, 229, 255, 0.1);
            color: var(--neon-cyan);
        }

        .card-pattern .card-tag.hot {
            background: rgba(255, 107, 53, 0.15);
            color: var(--accent-secondary);
        }
        .card-pattern .card-tag.warm {
            background: rgba(255, 193, 7, 0.12);
            color: var(--neon-amber);
        }
        .card-pattern .card-tag.cold {
            background: rgba(179, 136, 255, 0.12);
            color: var(--neon-purple);
        }

        /* ========== 图片卡片 ========== */
        .card-image {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .card-image:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .card-image .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .card-image .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .card-image:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .card-image .card-body {
            padding: 22px 20px;
        }

        .card-image h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-heading);
        }

        .card-image p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* ========== 数据条 ========== */
        .data-bar-wrap {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .data-bar-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-base);
        }

        .data-bar-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }

        .data-bar-item .bar-label {
            min-width: 90px;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .data-bar-item .bar-track {
            flex: 1;
            height: 12px;
            background: var(--bg-surface);
            border-radius: 6px;
            overflow: hidden;
        }

        .data-bar-item .bar-fill {
            height: 100%;
            border-radius: 6px;
            transition: width 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: 0 0 8px rgba(255, 107, 53, 0.3);
        }

        .data-bar-item .bar-val {
            min-width: 50px;
            text-align: right;
            font-weight: 700;
            color: var(--accent-primary);
            font-size: 0.95rem;
        }

        /* ========== 案例区块 ========== */
        .case-study-block {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            gap: 28px;
            align-items: flex-start;
            transition: all var(--transition-smooth);
        }

        .case-study-block:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }

        .case-study-block .case-img {
            width: 280px;
            flex-shrink: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .case-study-block .case-img img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            transition: transform var(--transition-smooth);
        }

        .case-study-block:hover .case-img img {
            transform: scale(1.04);
        }

        .case-study-block .case-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .case-study-block .case-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .case-study-block .case-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .case-stat-mini {
            background: var(--bg-surface);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            text-align: center;
            border: 1px solid var(--border-subtle);
        }

        .case-stat-mini .cs-num {
            font-weight: 700;
            color: var(--accent-primary);
            font-size: 1.2rem;
        }
        .case-stat-mini .cs-label {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-medium);
        }

        .faq-question {
            width: 100%;
            background: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            text-align: left;
            transition: color var(--transition-base);
            cursor: pointer;
        }

        .faq-question:hover {
            color: var(--accent-secondary);
        }

        .faq-question .faq-icon {
            font-size: 1.1rem;
            color: var(--accent-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 70px 0;
            background: var(--bg-secondary);
            overflow: hidden;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .cta-bg-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.12) 0%, transparent 70%);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 0;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 750;
            margin-bottom: 14px;
            color: #fff;
        }

        .cta-content p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-glow));
            color: #fff;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            letter-spacing: 0.5px;
            box-shadow: 0 6px 28px rgba(255, 107, 53, 0.4);
            transition: all var(--transition-smooth);
            text-align: center;
        }

        .btn-primary:hover {
            box-shadow: 0 10px 36px rgba(255, 107, 53, 0.6);
            transform: translateY(-3px);
            color: #fff;
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
        }

        .btn-outline {
            display: inline-block;
            padding: 13px 34px;
            background: transparent;
            color: var(--accent-secondary);
            border: 2px solid var(--accent-primary);
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.5px;
            transition: all var(--transition-smooth);
            text-align: center;
        }

        .btn-outline:hover {
            background: rgba(255, 107, 53, 0.1);
            border-color: var(--accent-secondary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 28px;
            color: var(--text-secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-heading);
            display: inline-block;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .footer-brand .logo-text span {
            color: var(--accent-primary);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-secondary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .cards-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-study-block {
                flex-direction: column;
            }
            .case-study-block .case-img {
                width: 100%;
                max-width: 400px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .main-nav li a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(10, 10, 15, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-subtle);
                padding: 12px 0;
                gap: 2px;
                z-index: 999;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
            }
            .main-nav.show {
                display: flex;
            }
            .main-nav li a {
                padding: 12px 24px;
                border-radius: 0;
                font-size: 0.95rem;
            }
            .nav-cta-btn {
                margin: 8px 24px;
                text-align: center;
                border-radius: 25px !important;
            }
            .cards-grid,
            .cards-grid.cols-3,
            .cards-grid.cols-2 {
                grid-template-columns: 1fr;
            }
            .page-hero {
                padding: 60px 0 50px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat-item .stat-num {
                font-size: 1.6rem;
            }
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .case-study-block {
                padding: 24px 18px;
            }
            .data-bar-item {
                flex-wrap: wrap;
            }
            .data-bar-item .bar-label {
                min-width: 100%;
            }
            .site-header .container-custom {
                gap: 12px;
            }
            .logo-link {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 14px;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero .hero-desc {
                font-size: 0.95rem;
            }
            .card-pattern {
                padding: 22px 18px;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 16px 18px;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .cta-content h2 {
                font-size: 1.5rem;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
        }

/* roulang page: category5 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #E8A817;
            --primary-dark: #C48A0A;
            --primary-light: #F5D066;
            --accent-glow: #FFD700;
            --neon-gold: #F5C518;
            --secondary: #1a1a2e;
            --secondary-light: #252540;
            --nav-bg: #0d0d1a;
            --nav-bg-rgb: 13, 13, 26;
            --bg: #f8f9fb;
            --bg-white: #ffffff;
            --bg-soft: #f0f2f5;
            --text: #2c2c2c;
            --text-heading: #1a1a2e;
            --text-light: #6c6c6c;
            --text-muted: #999999;
            --border: #e0e0e0;
            --border-light: #eeeeee;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --shadow-neon: 0 0 20px rgba(232, 168, 23, 0.35), 0 0 50px rgba(232, 168, 23, 0.12);
            --transition-fast: 0.2s ease;
            --transition: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --container-max: 1240px;
            --container-narrow: 960px;
        }

        /* ============ 基础 Reset 与全局 ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ============ 容器 ============ */
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-narrow {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============ 页头 / 暗色霓虹导航 ============ */
        .site-header {
            background: var(--nav-bg);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, transparent, var(--neon-gold), transparent) 1;
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            height: 64px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 1px;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--neon-gold);
            text-shadow: 0 0 12px rgba(245, 197, 24, 0.55), 0 0 28px rgba(245, 197, 24, 0.25);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--accent-glow));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #1a1a2e;
            font-weight: 900;
            font-size: 1.1rem;
            box-shadow: var(--shadow-neon);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .main-nav li {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 15px;
            color: #c0c0d0;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 6px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.3px;
        }
        .main-nav a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
            text-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
        }
        .main-nav a.active {
            color: var(--neon-gold);
            font-weight: 700;
            background: rgba(245, 197, 24, 0.08);
            text-shadow: 0 0 14px rgba(245, 197, 24, 0.5), 0 0 28px rgba(245, 197, 24, 0.2);
            box-shadow: inset 0 -2px 0 var(--neon-gold);
        }
        .nav-cta-btn {
            background: linear-gradient(135deg, var(--primary), var(--accent-glow)) !important;
            color: #1a1a2e !important;
            font-weight: 700 !important;
            padding: 9px 20px !important;
            border-radius: 20px !important;
            letter-spacing: 0.5px !important;
            box-shadow: 0 0 16px rgba(232, 168, 23, 0.4);
            margin-left: 6px;
            transition: all var(--transition) !important;
        }
        .nav-cta-btn:hover {
            box-shadow: 0 0 28px rgba(232, 168, 23, 0.65), 0 4px 12px rgba(0, 0, 0, 0.3) !important;
            transform: translateY(-1px);
            color: #1a1a2e !important;
            background: linear-gradient(135deg, var(--accent-glow), #FFE566) !important;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ============ 页面 Banner ============ */
        .page-banner {
            position: relative;
            background: url('assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 90px 20px 80px;
            text-align: center;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 13, 26, 0.88) 0%, rgba(26, 26, 46, 0.78) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: rgba(245, 197, 24, 0.15);
            border: 1px solid rgba(245, 197, 24, 0.35);
            color: var(--neon-gold);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1.5px;
            margin-bottom: 18px;
            text-shadow: 0 0 8px rgba(245, 197, 24, 0.3);
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            margin: 0 0 16px;
            letter-spacing: 1px;
            line-height: 1.3;
        }
        .page-banner h1 span {
            color: var(--neon-gold);
            text-shadow: 0 0 18px rgba(245, 197, 24, 0.5);
        }
        .page-banner .banner-desc {
            font-size: 1.1rem;
            color: #c8c8d8;
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto;
        }

        /* ============ 板块通用 ============ */
        .section-padding {
            padding: 70px 20px;
        }
        .section-padding-sm {
            padding: 50px 20px;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-heading);
            margin: 0 0 10px;
            letter-spacing: 0.5px;
        }
        .section-title h2 span {
            color: var(--primary);
        }
        .section-title .subtitle {
            font-size: 1rem;
            color: var(--text-light);
            max-width: 500px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-divider {
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent-glow));
            border-radius: 2px;
            margin: 14px auto 0;
        }

        /* ============ 统计指标卡片 ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent-glow));
            border-radius: 0 0 3px 3px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .stat-card:hover::before {
            transform: scaleX(1);
        }
        .stat-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(232, 168, 23, 0.12), rgba(245, 197, 24, 0.18));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--primary-dark);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: 1px;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-number .unit {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-light);
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ============ 统计维度详解 ============ */
        .dimension-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .dimension-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .dimension-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .dimension-info h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 14px;
        }
        .dimension-info p {
            color: var(--text-light);
            line-height: 1.8;
            margin: 0 0 18px;
        }
        .dimension-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .dimension-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.6;
        }
        .dimension-list li i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ============ 频率分析柱状图卡片 ============ */
        .freq-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .freq-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 24px;
            text-align: center;
        }
        .bar-chart {
            display: flex;
            align-items: flex-end;
            gap: 12px;
            height: 220px;
            padding: 0 8px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .bar-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            flex: 1;
            min-width: 40px;
            max-width: 80px;
        }
        .bar-value {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-heading);
        }
        .bar-fill {
            width: 100%;
            border-radius: 8px 8px 2px 2px;
            background: linear-gradient(180deg, var(--primary), var(--accent-glow));
            transition: all var(--transition);
            min-height: 20px;
            box-shadow: 0 2px 10px rgba(232, 168, 23, 0.2);
        }
        .bar-fill:hover {
            box-shadow: 0 4px 20px rgba(232, 168, 23, 0.45);
            filter: brightness(1.1);
        }
        .bar-label {
            font-size: 0.8rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ============ 方法卡片 ============ */
        .method-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .method-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .method-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(232, 168, 23, 0.3);
        }
        .method-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--accent-glow));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: #1a1a2e;
            font-size: 1.3rem;
            box-shadow: 0 4px 14px rgba(232, 168, 23, 0.25);
        }
        .method-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 10px;
        }
        .method-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.65;
            margin: 0;
        }

        /* ============ 步骤列表 ============ */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 700px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
            border-left: 3px solid var(--primary);
        }
        .step-num {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent-glow));
            color: #1a1a2e;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 3px 10px rgba(232, 168, 23, 0.3);
        }
        .step-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 6px;
        }
        .step-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 0;
            line-height: 1.6;
        }

        /* ============ CTA 板块 ============ */
        .cta-section {
            background: linear-gradient(160deg, #1a1a2e 0%, #0d0d1a 100%);
            padding: 70px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 6px;
            background: linear-gradient(90deg, transparent, var(--neon-gold), transparent);
            border-radius: 3px;
            box-shadow: 0 0 30px rgba(245, 197, 24, 0.5);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            margin: 0 0 12px;
        }
        .cta-section h2 span {
            color: var(--neon-gold);
        }
        .cta-section p {
            color: #c0c0d0;
            font-size: 1.05rem;
            max-width: 500px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-glow {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--accent-glow));
            color: #1a1a2e;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 36px;
            border-radius: 28px;
            letter-spacing: 0.5px;
            box-shadow: 0 0 24px rgba(232, 168, 23, 0.45), 0 6px 18px rgba(0, 0, 0, 0.3);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-glow:hover {
            box-shadow: 0 0 40px rgba(232, 168, 23, 0.7), 0 8px 24px rgba(0, 0, 0, 0.4);
            transform: translateY(-3px);
            color: #1a1a2e;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 750px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            color: var(--text-heading);
            font-size: 1rem;
            user-select: none;
            transition: background var(--transition-fast);
            gap: 14px;
        }
        .faq-question:hover {
            background: rgba(232, 168, 23, 0.04);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
            color: var(--text-light);
            font-size: 0.93rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 18px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #0d0d1a;
            padding: 50px 20px 24px;
            color: #c0c0d0;
            border-top: 2px solid rgba(245, 197, 24, 0.2);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 30px;
            max-width: var(--container-max);
            margin: 0 auto 36px;
        }
        .footer-brand .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: #ffffff;
            display: inline-block;
            margin-bottom: 10px;
        }
        .footer-brand .logo-text span {
            color: var(--neon-gold);
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: #999;
            line-height: 1.65;
            margin: 0;
        }
        .footer-col h5 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 12px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 7px;
        }
        .footer-col ul li a {
            color: #999;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--neon-gold);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: #777;
            margin: 0;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .dimension-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .dimension-image {
                max-width: 500px;
                margin: 0 auto;
            }
            .method-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
            .main-nav a {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
            .header-inner {
                height: 58px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                background: var(--nav-bg);
                flex-direction: column;
                padding: 12px 16px;
                gap: 2px;
                border-bottom: 2px solid rgba(245, 197, 24, 0.3);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
                z-index: 999;
            }
            .main-nav.mobile-open {
                display: flex;
            }
            .main-nav a {
                padding: 11px 16px;
                width: 100%;
                border-radius: 6px;
                font-size: 0.9rem;
            }
            .nav-cta-btn {
                margin-left: 0;
                text-align: center;
                margin-top: 4px;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 22px 14px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .method-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .bar-chart {
                height: 160px;
                gap: 8px;
            }
            .bar-item {
                min-width: 28px;
                max-width: 55px;
            }
            .page-banner {
                padding: 60px 16px 50px;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .section-padding {
                padding: 44px 16px;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 50px 16px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 400px;
                margin: 0 auto;
            }
            .step-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 18px 14px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .bar-chart {
                height: 130px;
                gap: 5px;
            }
            .bar-item {
                min-width: 22px;
                max-width: 40px;
            }
            .bar-value {
                font-size: 0.7rem;
            }
            .bar-label {
                font-size: 0.68rem;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .banner-desc {
                font-size: 0.85rem;
            }
            .btn-glow {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
            .dimension-info h3 {
                font-size: 1.3rem;
            }
            .method-card {
                padding: 20px 16px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #E8A817;
            --primary-glow: #F5C842;
            --primary-dark: #C48A0F;
            --secondary: #1B1B2F;
            --accent: #FF6B3D;
            --bg: #FAF9F6;
            --bg-alt: #F0EFEB;
            --surface: #FFFFFF;
            --text: #2C2C2C;
            --text-weak: #6B6B6B;
            --text-muted: #999999;
            --border: #E0DED9;
            --border-light: #EDEBE6;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
            --nav-bg: #0D0D1A;
            --nav-text: #D0D0D8;
            --nav-active: #E8A817;
            --nav-glow: 0 0 12px rgba(232, 168, 23, 0.5);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 3px;
        }

        ul {
            list-style: none;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            width: 100%;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--nav-bg);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid rgba(232, 168, 23, 0.25);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            gap: 20px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--primary);
            text-shadow: var(--nav-glow);
        }

        .logo-wrap a {
            display: flex;
            align-items: center;
            gap: 0;
            color: #fff;
        }

        .logo-wrap a:hover {
            color: #fff;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .main-nav li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--nav-text);
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }

        .main-nav li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform var(--transition);
            box-shadow: var(--nav-glow);
        }

        .main-nav li a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.06);
        }

        .main-nav li a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .main-nav li a.active {
            color: var(--primary);
            font-weight: 700;
            background: rgba(232, 168, 23, 0.08);
            text-shadow: 0 0 8px rgba(232, 168, 23, 0.4);
        }

        .main-nav li a.active::after {
            transform: translateX(-50%) scaleX(1);
            height: 3px;
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--primary), #D4960D) !important;
            color: #1B1B2F !important;
            font-weight: 700 !important;
            padding: 8px 18px !important;
            border-radius: 20px !important;
            letter-spacing: 0.5px !important;
            box-shadow: 0 2px 12px rgba(232, 168, 23, 0.35) !important;
            transition: all var(--transition) !important;
        }

        .nav-cta-btn:hover {
            background: linear-gradient(135deg, var(--primary-glow), #E8A817) !important;
            box-shadow: 0 4px 20px rgba(232, 168, 23, 0.5) !important;
            transform: translateY(-1px);
            color: #1B1B2F !important;
        }

        .nav-cta-btn::after {
            display: none !important;
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            background: url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            border-bottom: 3px solid rgba(232, 168, 23, 0.3);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 13, 26, 0.82) 0%, rgba(13, 13, 26, 0.7) 50%, rgba(13, 13, 26, 0.88) 100%);
            z-index: 1;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary), var(--primary-glow), var(--primary), transparent);
            z-index: 2;
            animation: neonScan 3s ease-in-out infinite;
        }

        @keyframes neonScan {
            0%,
            100% {
                opacity: 0.7;
            }
            50% {
                opacity: 1;
            }
        }

        .banner-content {
            position: relative;
            z-index: 3;
            padding: 40px 24px;
            max-width: 750px;
        }

        .banner-content .banner-icon {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 12px;
            text-shadow: var(--nav-glow);
            display: inline-block;
        }

        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
        }

        .banner-content h1 span {
            color: var(--primary);
            text-shadow: var(--nav-glow);
        }

        .banner-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            flex-wrap: wrap;
        }

        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition);
        }

        .banner-breadcrumb a:hover {
            color: var(--primary);
        }

        .banner-breadcrumb .separator {
            color: var(--primary);
        }

        .banner-breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== SECTION STYLES ========== */
        .section {
            padding: 70px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-dark {
            background: var(--secondary);
            color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary);
            background: rgba(232, 168, 23, 0.1);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--text-weak);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== CARDS ========== */
        .card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(232, 168, 23, 0.3);
        }

        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #e8e6e1;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .card-img-wrap .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #1B1B2F;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 14px;
            z-index: 2;
            letter-spacing: 0.5px;
        }

        .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.4;
        }

        .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .card-body .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .card-body .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--primary-dark);
            transition: all var(--transition);
            margin-top: auto;
        }

        .card-body .card-link i {
            transition: transform var(--transition);
        }

        .card-body .card-link:hover {
            color: var(--primary);
        }
        .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ========== STAT CARDS ========== */
        .stat-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: rgba(232, 168, 23, 0.3);
        }

        .stat-card .stat-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 1px;
            margin-bottom: 4px;
        }

        .stat-card .stat-number span {
            color: var(--primary);
        }

        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-weak);
            font-weight: 500;
        }

        /* ========== TIPS LIST ========== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 20px;
        }

        .tip-item {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition);
        }

        .tip-item:hover {
            box-shadow: var(--shadow);
            border-color: rgba(232, 168, 23, 0.25);
            transform: translateY(-2px);
        }

        .tip-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #1B1B2F;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 3px 12px rgba(232, 168, 23, 0.3);
        }

        .tip-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .tip-content p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(232, 168, 23, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 12px;
            transition: color var(--transition);
            font-family: inherit;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(232, 168, 23, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--primary);
            transition: all var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--primary);
            color: #1B1B2F;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(160deg, #1B1B2F 0%, #151528 40%, #0D0D1A 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
            padding: 70px 0;
            border-top: 2px solid rgba(232, 168, 23, 0.3);
            border-bottom: 2px solid rgba(232, 168, 23, 0.3);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(232, 168, 23, 0.06) 0%, transparent 60%);
            z-index: 1;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 650px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .cta-content h2 span {
            color: var(--primary);
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), #D4960D);
            color: #1B1B2F;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 30px;
            letter-spacing: 0.5px;
            box-shadow: 0 6px 24px rgba(232, 168, 23, 0.4);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-glow), #E8A817);
            box-shadow: 0 8px 32px rgba(232, 168, 23, 0.55);
            transform: translateY(-2px);
            color: #1B1B2F;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 16px rgba(232, 168, 23, 0.35);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 30px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            letter-spacing: 0.5px;
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-outline-light:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(232, 168, 23, 0.08);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0D0D1A;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 0;
            border-top: 3px solid rgba(232, 168, 23, 0.3);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo-text {
            display: inline-block;
            margin-bottom: 12px;
            font-size: 1.4rem;
        }

        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 280px;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            padding: 18px 0;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.6;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header-inner {
                height: 56px;
                padding: 0 16px;
            }

            .main-nav {
                gap: 1px;
            }
            .main-nav li a {
                padding: 7px 10px;
                font-size: 0.8rem;
            }
            .nav-cta-btn {
                padding: 7px 14px !important;
                font-size: 0.8rem !important;
            }
            .page-banner {
                min-height: 280px;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content p {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .tips-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 52px;
                padding: 0 16px;
            }
            .logo-text {
                font-size: 1.25rem;
            }

            .menu-toggle {
                display: block;
            }

            .main-nav {
                position: fixed;
                top: 52px;
                left: 0;
                right: 0;
                background: var(--nav-bg);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease, padding 0.35s ease;
                padding: 0 16px;
                border-bottom: 2px solid rgba(232, 168, 23, 0.25);
                z-index: 999;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
            }

            .main-nav.open {
                max-height: 600px;
                padding: 8px 16px;
            }

            .main-nav li a {
                padding: 12px 16px;
                font-size: 0.9rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .main-nav li a::after {
                display: none;
            }
            .main-nav li a.active {
                background: rgba(232, 168, 23, 0.1);
                border-left: 3px solid var(--primary);
            }
            .nav-cta-btn {
                margin: 8px 0;
                text-align: center;
                border-radius: 8px !important;
                padding: 12px !important;
            }

            .page-banner {
                min-height: 240px;
            }
            .banner-content h1 {
                font-size: 1.6rem;
            }
            .banner-content p {
                font-size: 0.85rem;
            }
            .banner-content .banner-icon {
                font-size: 2rem;
            }
            .section {
                padding: 36px 0;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
            .tips-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .tip-item {
                padding: 18px 20px;
                gap: 12px;
            }
            .tip-num {
                width: 36px;
                height: 36px;
                font-size: 0.95rem;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-card .stat-number {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .cta-content h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 15px 18px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 14px;
            }
            .container-narrow {
                padding: 0 14px;
            }
            .header-inner {
                padding: 0 10px;
                height: 48px;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .page-banner {
                min-height: 200px;
            }
            .banner-content {
                padding: 28px 16px;
            }
            .banner-content h1 {
                font-size: 1.3rem;
            }
            .banner-content p {
                font-size: 0.8rem;
            }
            .section {
                padding: 28px 0;
            }
            .section-header h2 {
                font-size: 1.2rem;
            }
            .section-header .section-subtitle {
                font-size: 0.85rem;
            }
            .card-body h3 {
                font-size: 0.95rem;
            }
            .card-body .card-excerpt {
                font-size: 0.8rem;
            }
            .stat-card .stat-number {
                font-size: 1.4rem;
            }
            .btn-primary {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .btn-outline-light {
                padding: 10px 22px;
                font-size: 0.85rem;
            }
            .faq-question {
                font-size: 0.85rem;
            }
            .footer-bottom {
                font-size: 0.7rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #E8A817;
            --primary-glow: #F5C542;
            --primary-dark: #C48A0F;
            --accent: #FF6B35;
            --accent-glow: #FF8C5A;
            --nav-bg: #0D0D0F;
            --nav-bg-secondary: #141418;
            --body-bg: #F9F9FB;
            --surface: #FFFFFF;
            --surface-alt: #F2F2F5;
            --text-primary: #1A1A1F;
            --text-secondary: #4A4A55;
            --text-muted: #7A7A85;
            --text-on-dark: #E8E8EC;
            --border: #E2E2E8;
            --border-light: #EEEEF2;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 24px rgba(232, 168, 23, 0.3);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-display: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans CN', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --section-gap: 72px;
            --section-gap-mobile: 48px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--body-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 18px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: var(--nav-bg);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            color: #fff;
            letter-spacing: -1px;
            box-shadow: 0 0 18px rgba(232, 168, 23, 0.45);
            transition: box-shadow var(--transition-base);
        }
        .logo-wrap:hover .logo-icon {
            box-shadow: 0 0 28px rgba(232, 168, 23, 0.7);
        }
        .logo-text {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 1px;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .logo-text span {
            color: var(--primary-glow);
            font-weight: 800;
        }
        .logo-wrap:hover .logo-text {
            color: var(--primary-glow);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .main-nav li a {
            display: inline-block;
            padding: 8px 15px;
            border-radius: 6px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #B8B8C0;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .main-nav li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary-glow);
            border-radius: 1px;
            transition: transform var(--transition-base);
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .main-nav li a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.04);
        }
        .main-nav li a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .main-nav li a.active {
            color: var(--primary-glow);
            background: rgba(232, 168, 23, 0.1);
            font-weight: 600;
            text-shadow: 0 0 12px rgba(245, 197, 66, 0.4);
        }
        .main-nav li a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--primary-glow);
            box-shadow: 0 0 14px var(--primary-glow);
        }
        .nav-cta-btn {
            display: inline-block !important;
            padding: 9px 20px !important;
            border-radius: 22px !important;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%) !important;
            color: #FFFFFF !important;
            font-weight: 700 !important;
            font-size: 0.9rem !important;
            letter-spacing: 0.6px !important;
            box-shadow: 0 4px 16px rgba(232, 168, 23, 0.35) !important;
            transition: all var(--transition-smooth) !important;
            border: none !important;
            white-space: nowrap !important;
        }
        .nav-cta-btn:hover {
            box-shadow: 0 6px 24px rgba(232, 168, 23, 0.55) !important;
            transform: translateY(-2px) !important;
            background: linear-gradient(135deg, var(--primary-glow) 0%, var(--accent-glow) 100%) !important;
            color: #fff !important;
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* 移动端导航 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition-fast);
            line-height: 1;
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-toggle:focus-visible {
            outline: 2px solid var(--primary-glow);
            outline-offset: 2px;
        }
        @media (max-width: 1024px) {
            .main-nav {
                gap: 2px;
            }
            .main-nav li a {
                padding: 7px 10px;
                font-size: 0.88rem;
            }
            .nav-cta-btn {
                padding: 7px 15px !important;
                font-size: 0.82rem !important;
            }
        }
        @media (max-width: 860px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--nav-bg-secondary);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                max-height: 0;
                overflow: hidden;
                opacity: 0;
                pointer-events: none;
                transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
                z-index: 999;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
            }
            .main-nav.open {
                max-height: 500px;
                opacity: 1;
                pointer-events: auto;
                padding: 16px 20px;
            }
            .main-nav li a {
                display: block;
                padding: 12px 16px;
                border-radius: 8px;
                font-size: 1rem;
                text-align: center;
            }
            .nav-cta-btn {
                text-align: center !important;
                margin-top: 6px;
                border-radius: 8px !important;
                padding: 12px 16px !important;
                font-size: 0.95rem !important;
            }
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            background: linear-gradient(160deg, #0D0D15 0%, #1A1A28 40%, #14141E 100%);
            padding: 70px 0 60px;
            overflow: hidden;
            z-index: 1;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.22;
            z-index: -1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary-glow), var(--accent-glow), transparent);
            z-index: 2;
            box-shadow: 0 0 18px rgba(232, 168, 23, 0.5);
        }
        .banner-content {
            text-align: center;
            color: #fff;
            position: relative;
            z-index: 3;
        }
        .banner-badge {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 20px;
            background: rgba(232, 168, 23, 0.15);
            border: 1px solid rgba(232, 168, 23, 0.35);
            color: var(--primary-glow);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .banner-content h1 {
            font-family: var(--font-display);
            font-size: 2.7rem;
            font-weight: 800;
            letter-spacing: 1.5px;
            margin-bottom: 14px;
            color: #FFFFFF;
            text-shadow: 0 0 40px rgba(245, 197, 66, 0.35);
        }
        .banner-content h1 span {
            color: var(--primary-glow);
            position: relative;
        }
        .banner-subtitle {
            font-size: 1.15rem;
            color: #C0C0CC;
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
            letter-spacing: 0.4px;
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 48px 0 40px;
            }
            .banner-content h1 {
                font-size: 1.8rem;
                letter-spacing: 1px;
            }
            .banner-subtitle {
                font-size: 1rem;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-mobile) 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header .section-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 16px;
            background: rgba(232, 168, 23, 0.1);
            color: var(--primary-dark);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.8px;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.6px;
            margin-bottom: 8px;
        }
        .section-header .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.65;
        }

        /* ========== INTRO SECTION ========== */
        .intro-block {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 36px;
            align-items: center;
            flex-wrap: wrap;
        }
        .intro-text {
            flex: 1 1 360px;
        }
        .intro-text h3 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .intro-text p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 10px;
            font-size: 0.98rem;
        }
        .intro-visual {
            flex: 0 0 280px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
        }
        .intro-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .intro-visual:hover img {
            transform: scale(1.04);
        }
        @media (max-width: 768px) {
            .intro-block {
                padding: 28px 22px;
                flex-direction: column;
                gap: 22px;
            }
            .intro-visual {
                flex: 0 0 auto;
                width: 100%;
                aspect-ratio: 16/10;
            }
        }

        /* ========== STRATEGY CARDS ========== */
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .strategy-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .strategy-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(232, 168, 23, 0.25);
        }
        .strategy-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #e8e8ec;
        }
        .strategy-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .strategy-card:hover .strategy-card-img img {
            transform: scale(1.06);
        }
        .strategy-card-body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .strategy-card-body .card-num {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.35;
            line-height: 1;
            margin-bottom: 6px;
        }
        .strategy-card-body h4 {
            font-family: var(--font-display);
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .strategy-card-body p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .strategy-card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 0.9rem;
            transition: gap var(--transition-fast), color var(--transition-fast);
            align-self: flex-start;
        }
        .strategy-card-body .card-link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }
        .strategy-card-body .card-link:hover {
            color: var(--accent);
            gap: 10px;
        }
        .strategy-card-body .card-link:hover i {
            transform: translateX(3px);
        }

        /* ========== STEPS / PROCESS ========== */
        .process-section {
            background: var(--surface-alt);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
        }
        .process-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
            counter-reset: step;
        }
        .process-item {
            position: relative;
            padding: 28px 22px 22px;
            background: var(--surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-smooth);
            counter-increment: step;
        }
        .process-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .process-item::before {
            content: '0' counter(step);
            font-family: var(--font-display);
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.2;
            position: absolute;
            top: 10px;
            right: 20px;
            line-height: 1;
            pointer-events: none;
        }
        .process-icon {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .process-item h4 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .process-item p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
            margin: 0;
        }

        /* ========== TIPS HIGHLIGHT ========== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .tip-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
        }
        .tip-card:hover {
            box-shadow: var(--shadow-md);
            border-left-color: var(--accent);
            transform: translateX(3px);
        }
        .tip-card .tip-icon {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .tip-card h5 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .tip-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* ========== PITFALLS SECTION ========== */
        .pitfalls-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 18px;
        }
        .pitfall-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }
        .pitfall-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(255, 107, 53, 0.3);
        }
        .pitfall-icon {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 107, 53, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
            font-weight: 700;
        }
        .pitfall-content h5 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .pitfall-content p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-section-alt {
            background: linear-gradient(150deg, #0D0D15 0%, #1A1A28 55%, #14141E 100%);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-section-alt::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.13;
            z-index: 0;
        }
        .cta-section-alt>* {
            position: relative;
            z-index: 1;
        }
        .cta-section-alt h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .cta-section-alt p {
            color: #C0C0CC;
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .btn-cta-glow {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 30px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1.05rem;
            letter-spacing: 0.8px;
            box-shadow: 0 6px 28px rgba(232, 168, 23, 0.45);
            transition: all var(--transition-smooth);
            border: none;
            cursor: pointer;
        }
        .btn-cta-glow:hover {
            box-shadow: 0 10px 36px rgba(232, 168, 23, 0.65);
            transform: translateY(-3px);
            color: #fff;
        }
        .btn-cta-glow:focus-visible {
            outline: 3px solid var(--primary-glow);
            outline-offset: 3px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0D0D0F;
            color: #B8B8C0;
            padding: 56px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
        }
        .footer-brand .logo-text {
            font-size: 1.5rem;
            margin-bottom: 10px;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #8A8A95;
            max-width: 340px;
            margin-top: 6px;
        }
        .footer-col h5 {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: #8A8A95;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: #6A6A75;
            letter-spacing: 0.3px;
        }

        /* ========== MISC ========== */
        .highlight-num {
            font-family: var(--font-display);
            font-weight: 800;
            color: var(--primary);
        }
        .divider {
            width: 50px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            margin: 0 auto 16px;
        }
        @media (max-width: 520px) {
            .strategy-grid {
                grid-template-columns: 1fr;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .pitfalls-list {
                grid-template-columns: 1fr;
            }
            .process-list {
                grid-template-columns: 1fr;
            }
            .cta-section-alt {
                padding: 36px 20px;
            }
            .cta-section-alt h2 {
                font-size: 1.5rem;
            }
            .process-section {
                padding: 28px 18px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #f0a500;
            --color-primary-glow: #ffbe3d;
            --color-accent: #00d4aa;
            --color-accent-glow: #00f0c0;
            --color-bg-dark: #0d0d14;
            --color-bg-card: #151520;
            --color-bg-section: #111118;
            --color-bg-elevated: #1a1a28;
            --color-text: #e8e8f0;
            --color-text-strong: #ffffff;
            --color-text-weak: #9a9ab0;
            --color-text-muted: #6b6b80;
            --color-border: #252535;
            --color-border-light: #303048;
            --color-neon-line: #f0a500;
            --color-danger: #ff4d5a;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
            --shadow-elevated: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(240, 165, 0, 0.25);
            --shadow-glow-accent: 0 0 18px rgba(0, 212, 170, 0.2);
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --max-width: 1240px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg-dark);
            color: var(--color-text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul {
            list-style: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: #0a0a14;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.6);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 1.55rem;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--color-text-strong);
        }

        .logo-text span {
            color: var(--color-primary);
            text-shadow: 0 0 10px rgba(240, 165, 0, 0.5);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #d48800);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            color: #0a0a14;
            box-shadow: var(--shadow-glow);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .main-nav li a {
            display: block;
            padding: 9px 15px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition-smooth);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .main-nav li a:hover {
            color: var(--color-text-strong);
            background: rgba(240, 165, 0, 0.08);
        }

        .main-nav li a.active {
            color: var(--color-primary);
            background: rgba(240, 165, 0, 0.12);
            font-weight: 600;
            text-shadow: 0 0 8px rgba(240, 165, 0, 0.4);
            box-shadow: inset 0 -2px 0 var(--color-primary);
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--color-primary), #d48800) !important;
            color: #0a0a14 !important;
            font-weight: 700 !important;
            border-radius: 22px !important;
            padding: 9px 20px !important;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth) !important;
            letter-spacing: 0.5px !important;
            margin-left: 6px;
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(240, 165, 0, 0.45) !important;
            background: linear-gradient(135deg, #ffb820, #e89800) !important;
            color: #0a0a14 !important;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--color-text-strong);
            font-size: 1.6rem;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: 70px 0 60px;
            background: linear-gradient(180deg, #0a0a16 0%, #0d0d1a 40%, #11111c 100%);
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 550px;
            height: 550px;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 212, 170, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .banner-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-text-strong);
            line-height: 1.25;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.5px;
        }

        .banner-content h1 .highlight {
            color: var(--color-primary);
            text-shadow: 0 0 16px rgba(240, 165, 0, 0.4);
        }

        .banner-content .banner-desc {
            font-size: 1.08rem;
            color: var(--color-text-weak);
            line-height: 1.75;
            margin-bottom: var(--spacing-lg);
            max-width: 520px;
        }

        .banner-meta-row {
            display: flex;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            margin-bottom: var(--spacing-md);
        }

        .banner-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--color-text-weak);
        }

        .banner-meta-item i {
            color: var(--color-primary);
            font-size: 1rem;
        }

        .banner-meta-item strong {
            color: var(--color-text-strong);
            font-weight: 700;
        }

        .banner-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .banner-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-elevated);
            max-height: 320px;
            object-fit: cover;
            border: 1px solid var(--color-border-light);
        }

        .banner-visual .chart-preview {
            width: 100%;
            max-width: 460px;
            height: 280px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-elevated);
        }

        .chart-preview .mock-chart {
            width: 90%;
            height: 75%;
        }

        .mock-chart svg {
            width: 100%;
            height: 100%;
        }

        /* ========== SECTION COMMONS ========== */
        .section-block {
            padding: var(--spacing-2xl) 0;
        }

        .section-block.alt-bg {
            background: var(--color-bg-section);
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--color-primary);
            background: rgba(240, 165, 0, 0.1);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: var(--spacing-sm);
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }

        .section-header .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-weak);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px;
            margin: 14px auto;
            box-shadow: 0 0 10px rgba(240, 165, 0, 0.35);
        }

        /* ========== CARDS ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }

        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .card-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            transition: all var(--transition-smooth);
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .card-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-elevated);
            transform: translateY(-4px);
        }

        .card-item .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            font-weight: 700;
        }

        .card-icon.icon-gold {
            background: rgba(240, 165, 0, 0.15);
            color: var(--color-primary);
        }

        .card-icon.icon-teal {
            background: rgba(0, 212, 170, 0.15);
            color: var(--color-accent);
        }

        .card-icon.icon-blue {
            background: rgba(80, 150, 255, 0.15);
            color: #5096ff;
        }

        .card-icon.icon-rose {
            background: rgba(255, 100, 130, 0.15);
            color: #ff6482;
        }

        .card-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .card-item p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.65;
            margin: 0;
        }

        .card-item .card-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-primary);
            margin: 8px 0 4px;
            letter-spacing: 0.5px;
            text-shadow: 0 0 8px rgba(240, 165, 0, 0.3);
        }

        .card-item .card-label-sm {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* ========== LIST STYLES ========== */
        .styled-list {
            list-style: none;
            padding: 0;
        }

        .styled-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--color-text);
            line-height: 1.6;
        }

        .styled-list li:last-child {
            border-bottom: none;
        }

        .styled-list li .list-marker {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.2);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            margin-top: 2px;
        }

        /* ========== FEATURE ROW ========== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .feature-row.reverse {
            direction: ltr;
        }

        .feature-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--spacing-sm);
        }

        .feature-text p {
            color: var(--color-text-weak);
            line-height: 1.75;
            margin-bottom: var(--spacing-md);
        }

        .feature-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
        }

        /* ========== STATS BAR ========== */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            text-align: center;
        }

        .stat-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-md);
            box-shadow: var(--shadow-card);
        }

        .stat-item .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            text-shadow: 0 0 10px rgba(240, 165, 0, 0.3);
        }

        .stat-item .stat-label {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            margin-top: 4px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: var(--color-border-light);
        }

        .faq-question {
            padding: 16px 20px;
            font-weight: 700;
            color: var(--color-text-strong);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            letter-spacing: 0.3px;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.15);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-smooth);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: rgba(240, 165, 0, 0.25);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 20px;
            color: var(--color-text-weak);
            line-height: 1.7;
            font-size: 0.9rem;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(160deg, #0f0f1a 0%, #141422 50%, #0d0d18 100%);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-2xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text-strong);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: var(--color-text-weak);
            max-width: 550px;
            margin: 0 auto var(--spacing-lg);
            position: relative;
            z-index: 1;
            font-size: 1rem;
            line-height: 1.7;
        }

        .btn-primary-glow {
            display: inline-block;
            background: linear-gradient(135deg, var(--color-primary), #d48800);
            color: #0a0a14;
            font-weight: 700;
            font-size: 1rem;
            padding: 12px 32px;
            border-radius: 28px;
            letter-spacing: 0.5px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 32px rgba(240, 165, 0, 0.5);
            color: #0a0a14;
        }

        .btn-outline-light {
            display: inline-block;
            background: transparent;
            color: var(--color-text-strong);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 28px;
            border-radius: 28px;
            border: 2px solid var(--color-border-light);
            letter-spacing: 0.4px;
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
            margin-left: var(--spacing-sm);
        }

        .btn-outline-light:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: 0 0 16px rgba(240, 165, 0, 0.2);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #080810;
            border-top: 1px solid var(--color-border);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            color: var(--color-text-weak);
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand .logo-text {
            font-size: 1.3rem;
            display: block;
            margin-bottom: 8px;
        }

        .footer-brand p {
            color: var(--color-text-muted);
            line-height: 1.6;
            font-size: 0.85rem;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: var(--spacing-md);
            text-align: center;
            color: var(--color-text-muted);
            font-size: 0.8rem;
            letter-spacing: 0.3px;
        }

        /* ========== NEON ACCENT LINE ========== */
        .neon-line {
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), var(--color-primary), transparent);
            border-radius: 2px;
            opacity: 0.7;
            margin: 0 auto;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .banner-inner {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .banner-content .banner-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }

            .banner-meta-row {
                justify-content: center;
            }

            .banner-visual {
                order: -1;
            }

            .banner-visual .chart-preview {
                max-width: 360px;
                height: 220px;
                margin: 0 auto;
            }

            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }

            .card-grid.cols-2 {
                grid-template-columns: 1fr;
            }

            .feature-row {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .feature-visual {
                order: -1;
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .page-banner {
                padding: 50px 0 40px;
            }

            .banner-content h1 {
                font-size: 2rem;
            }

            .section-header h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: nowrap;
            }

            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #0a0a14;
                border-bottom: 1px solid var(--color-border);
                padding: var(--spacing-sm);
                z-index: 999;
                box-shadow: var(--shadow-elevated);
                gap: 2px;
            }

            .main-nav.show {
                display: flex;
            }

            .main-nav li a {
                padding: 12px 16px;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }

            .nav-cta-btn {
                margin-left: 0;
                text-align: center;
                border-radius: var(--radius-sm) !important;
            }

            .mobile-toggle {
                display: block;
            }

            .card-grid.cols-3 {
                grid-template-columns: 1fr;
            }

            .stats-bar {
                grid-template-columns: 1fr 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .banner-content h1 {
                font-size: 1.7rem;
            }

            .section-block {
                padding: var(--spacing-xl) 0;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .btn-outline-light {
                margin-left: 0;
                margin-top: var(--spacing-sm);
            }
        }

        @media (max-width: 520px) {
            .stats-bar {
                grid-template-columns: 1fr;
            }

            .banner-meta-row {
                flex-direction: column;
                gap: 8px;
                align-items: center;
            }

            .banner-visual .chart-preview {
                max-width: 280px;
                height: 180px;
            }

            .page-banner {
                padding: 36px 0 30px;
            }

            .banner-content h1 {
                font-size: 1.4rem;
            }

            .section-header h2 {
                font-size: 1.35rem;
            }

            .card-item {
                padding: var(--spacing-md);
            }
        }