/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b7a;
            --secondary: #1d3557;
            --secondary-light: #2d4a7a;
            --accent: #f4a261;
            --accent-dark: #e07c3a;
            --bg-dark: #0b1a2e;
            --bg-mid: #13273f;
            --bg-light: #f8f9fa;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border: #e0e0e8;
            --border-light: #f0f0f5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 3.6vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.4vw, 1.8rem); }
        h4 { font-size: 1.2rem; }
        .section-subtitle { font-size: 1rem; color: var(--text-light); margin-top: 8px; letter-spacing: 0.3px; }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 26, 46, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(11, 26, 46, 0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            display: inline-flex;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: white;
            font-weight: 900;
        }
        .logo span { color: var(--primary-light); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list a {
            color: rgba(255,255,255,0.78);
            font-size: 0.92rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-light);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-list a:hover { color: var(--text-white); }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active { color: var(--text-white); }
        .nav-list a.active::after { width: 100%; background: var(--primary); }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-white) !important;
            padding: 10px 24px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.88rem;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
            transition: var(--transition);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(230, 57, 70, 0.45); color: white !important; }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 3px;
            transition: var(--transition);
        }
        @media (max-width: 900px) {
            .nav-list { display: none; }
            .menu-toggle { display: flex; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(11, 26, 46, 0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px 32px;
                gap: 18px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .nav-list.open a { font-size: 1.05rem; }
            .nav-cta { align-self: flex-start; }
        }
        @media (max-width: 480px) {
            .header-inner { padding: 0 12px; }
            .logo { font-size: 1.25rem; }
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            overflow: hidden;
            padding-top: 80px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.5;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% { transform: scale(1.05); }
            100% { transform: scale(1.15); }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(11,26,46,0.88) 30%, rgba(11,26,46,0.60) 70%, rgba(11,26,46,0.40) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 80px 24px 100px;
        }
        .hero-tag {
            display: inline-block;
            background: rgba(230, 57, 70, 0.20);
            color: var(--primary-light);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 50px;
            border: 1px solid rgba(230, 57, 70, 0.25);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .hero h1 {
            color: var(--text-white);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero h1 span { color: var(--primary-light); }
        .hero p {
            color: rgba(255,255,255,0.75);
            font-size: 1.15rem;
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-white);
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 6px 24px rgba(230, 57, 70, 0.35);
            transition: var(--transition);
            border: none;
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(230, 57, 70, 0.45); color: white; }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255,255,255,0.08);
            color: var(--text-white);
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid rgba(255,255,255,0.18);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.16); color: white; transform: translateY(-2px); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat h3 { color: var(--text-white); font-size: 1.8rem; font-weight: 800; }
        .hero-stat p { color: rgba(255,255,255,0.55); font-size: 0.85rem; margin-bottom: 0; }
        @media (max-width: 768px) {
            .hero-content { padding: 60px 16px 70px; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.4rem; }
        }
        @media (max-width: 480px) {
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .btn-primary, .btn-secondary { justify-content: center; }
        }

        /* ===== Sections Common ===== */
        section { padding: 80px 0; }
        @media (max-width: 768px) { section { padding: 56px 0; } }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { color: var(--text-light); max-width: 580px; margin: 0 auto; font-size: 1.05rem; }

        /* ===== Features / Services ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--border); }
        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(230,57,70,0.12), rgba(230,57,70,0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; }
        @media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 560px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Latest News / CMS List ===== */
        .news-section { background: var(--bg-dark); position: relative; }
        .news-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.06;
        }
        .news-section .section-title h2 { color: var(--text-white); }
        .news-section .section-title p { color: rgba(255,255,255,0.55); }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .news-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .news-card:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.12); transform: translateY(-3px); }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 10px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.45);
        }
        .news-cat {
            display: inline-block;
            background: rgba(230,57,70,0.18);
            color: var(--primary-light);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .news-card h3 { color: var(--text-white); font-size: 1.05rem; margin-bottom: 8px; }
        .news-card h3 a { color: var(--text-white); }
        .news-card h3 a:hover { color: var(--primary-light); }
        .news-card p { color: rgba(255,255,255,0.60); font-size: 0.9rem; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: rgba(255,255,255,0.5);
            font-size: 1rem;
        }
        @media (max-width: 700px) { .news-grid { grid-template-columns: 1fr; } }

        /* ===== Categories / Events ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            aspect-ratio: 4 / 3;
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .category-card img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .category-card:hover img { transform: scale(1.06); }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11,26,46,0.85) 20%, rgba(11,26,46,0.10) 70%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
        }
        .category-overlay h3 { color: var(--text-white); font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
        .category-overlay p { color: rgba(255,255,255,0.65); font-size: 0.85rem; }
        @media (max-width: 900px) { .categories-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 480px) { .categories-grid { grid-template-columns: 1fr; } }

        /* ===== Stats / Social Proof ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--secondary), var(--bg-dark));
            color: var(--text-white);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item h3 { color: var(--text-white); font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em; }
        .stat-item p { color: rgba(255,255,255,0.6); font-size: 0.95rem; margin-top: 4px; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
        @media (max-width: 480px) { .stat-item h3 { font-size: 2rem; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 760px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question .faq-icon { font-size: 1.2rem; transition: var(--transition); color: var(--text-light); }
        .faq-item.open .faq-question .faq-icon { transform: rotate(45deg); color: var(--primary); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark), var(--secondary));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 620px;
            margin: 0 auto;
        }
        .cta-content h2 { color: var(--text-white); font-size: clamp(1.6rem, 3.6vw, 2.6rem); margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.65); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-content .btn-primary { font-size: 1.1rem; padding: 16px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background: #081525;
            color: rgba(255,255,255,0.55);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p { max-width: 320px; margin-top: 12px; font-size: 0.9rem; line-height: 1.7; }
        .footer-brand .logo { margin-bottom: 8px; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
        @media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mb-12 { margin-bottom: 12px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 768px) {
            .hero { min-height: 90vh; }
            .section-title { margin-bottom: 32px; }
        }
        @media (max-width: 480px) {
            .hero { min-height: 85vh; }
            .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; justify-content: center; }
        }

        /* ===== Smooth reveal ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --color-primary: #0f1923;
        --color-primary-light: #1a2d4a;
        --color-secondary: #d4a843;
        --color-secondary-hover: #c49a35;
        --color-accent: #e8c44a;
        --color-bg: #f5f7fa;
        --color-bg-alt: #eef1f5;
        --color-bg-dark: #0b1219;
        --color-text: #1a1a2e;
        --color-text-light: #6b7280;
        --color-text-lighter: #9ca3af;
        --color-text-on-dark: #e8edf5;
        --color-border: #e5e7eb;
        --color-border-dark: #2d3a4a;
        --color-white: #ffffff;
        --color-success: #10b981;
        --color-warning: #f59e0b;
        --color-error: #ef4444;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --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 12px 40px rgba(0,0,0,0.12);
        --shadow-glow: 0 0 30px rgba(212,168,67,0.15);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ===== Reset / Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font-family);
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text);
        background: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--color-secondary); }
    img { max-width: 100%; height: auto; display: block; }
    button { cursor: pointer; font-family: inherit; border: none; background: none; }
    input, textarea { font-family: inherit; font-size: 1rem; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.2rem; }
    p { margin-bottom: 1rem; }
    p:last-child { margin-bottom: 0; }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 导航 ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(15, 25, 35, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(212, 168, 67, 0.15);
        height: var(--header-height);
        transition: background var(--transition);
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--color-white);
        letter-spacing: 0.5px;
        text-decoration: none;
    }
    .logo:hover { color: var(--color-secondary); }
    .logo .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--color-secondary), #b8942e);
        border-radius: var(--radius-sm);
        font-size: 1.2rem;
        font-weight: 900;
        color: var(--color-primary);
    }
    .logo span { color: var(--color-secondary); font-weight: 700; }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-list li a {
        display: block;
        padding: 8px 18px;
        font-size: 0.95rem;
        font-weight: 500;
        color: rgba(232, 237, 245, 0.8);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        position: relative;
    }
    .nav-list li a:hover {
        color: var(--color-white);
        background: rgba(212, 168, 67, 0.1);
    }
    .nav-list li a.active {
        color: var(--color-secondary);
        background: rgba(212, 168, 67, 0.12);
    }
    .nav-list li a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 2px;
        background: var(--color-secondary);
        border-radius: 2px;
    }
    .nav-list li a.nav-cta {
        background: linear-gradient(135deg, var(--color-secondary), #b8942e);
        color: var(--color-primary);
        font-weight: 700;
        padding: 8px 24px;
        border-radius: var(--radius-sm);
        box-shadow: 0 4px 14px rgba(212, 168, 67, 0.3);
        transition: all var(--transition);
    }
    .nav-list li a.nav-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(212, 168, 67, 0.4);
        background: linear-gradient(135deg, #e0b84a, #c49a35);
        color: var(--color-primary);
    }
    .nav-toggle {
        display: none;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        color: var(--color-white);
        font-size: 1.5rem;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .nav-toggle:hover { background: rgba(255,255,255,0.08); }

    /* ===== 文章 Hero ===== */
    .article-hero {
        margin-top: var(--header-height);
        position: relative;
        min-height: 480px;
        display: flex;
        align-items: flex-end;
        background: var(--color-bg-dark) url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(11,18,25,0.3) 0%, rgba(11,18,25,0.85) 70%, #0b1219 100%);
        z-index: 1;
    }
    .article-hero .container {
        position: relative;
        z-index: 2;
        padding-top: 60px;
        padding-bottom: 60px;
    }
    .article-hero-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px 24px;
        margin-bottom: 20px;
    }
    .article-hero-meta .category-badge {
        display: inline-block;
        padding: 4px 16px;
        font-size: 0.82rem;
        font-weight: 600;
        color: var(--color-primary);
        background: var(--color-secondary);
        border-radius: 20px;
        letter-spacing: 0.3px;
    }
    .article-hero-meta .meta-date {
        font-size: 0.9rem;
        color: rgba(232, 237, 245, 0.7);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-hero-meta .meta-date i { color: var(--color-secondary); }
    .article-hero h1 {
        font-size: 3rem;
        font-weight: 800;
        color: var(--color-white);
        line-height: 1.25;
        max-width: 900px;
        text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        margin-bottom: 16px;
    }
    .article-hero .hero-desc {
        font-size: 1.1rem;
        color: rgba(232, 237, 245, 0.8);
        max-width: 720px;
        line-height: 1.6;
    }

    /* ===== 文章主体 ===== */
    .article-main {
        background: var(--color-white);
        padding: 60px 0;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 48px;
    }
    .article-body {
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--color-text);
    }
    .article-body .featured-image {
        margin-bottom: 32px;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-md);
    }
    .article-body .featured-image img {
        width: 100%;
        height: auto;
        display: block;
    }
    .article-body p {
        margin-bottom: 1.25rem;
    }
    .article-body h2, .article-body h3 {
        margin-top: 2rem;
        margin-bottom: 1rem;
        color: var(--color-primary);
    }
    .article-body ul, .article-body ol {
        margin-bottom: 1.25rem;
        padding-left: 1.5rem;
    }
    .article-body ul li { list-style: disc; margin-bottom: 0.5rem; }
    .article-body ol li { list-style: decimal; margin-bottom: 0.5rem; }
    .article-body blockquote {
        border-left: 4px solid var(--color-secondary);
        padding: 16px 24px;
        margin: 24px 0;
        background: var(--color-bg-alt);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        font-style: italic;
        color: var(--color-text-light);
    }
    .article-body img {
        border-radius: var(--radius-md);
        margin: 24px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-body a {
        color: var(--color-secondary);
        text-decoration: underline;
        text-underline-offset: 3px;
    }
    .article-body a:hover { color: #b8942e; }

    /* ===== 侧边栏 ===== */
    .article-sidebar {
        position: sticky;
        top: calc(var(--header-height) + 30px);
        align-self: start;
    }
    .sidebar-card {
        background: var(--color-bg);
        border-radius: var(--radius-md);
        padding: 28px;
        margin-bottom: 24px;
        border: 1px solid var(--color-border);
    }
    .sidebar-card h3 {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 16px;
        color: var(--color-primary);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-card h3 i { color: var(--color-secondary); }
    .sidebar-card ul li {
        padding: 10px 0;
        border-bottom: 1px solid var(--color-border);
    }
    .sidebar-card ul li:last-child { border-bottom: none; }
    .sidebar-card ul li a {
        font-size: 0.95rem;
        color: var(--color-text-light);
        display: flex;
        align-items: center;
        gap: 8px;
        transition: all var(--transition);
    }
    .sidebar-card ul li a:hover {
        color: var(--color-secondary);
        padding-left: 4px;
    }
    .sidebar-card ul li a i {
        font-size: 0.8rem;
        color: var(--color-secondary);
    }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--color-primary), #1a2d4a);
        color: var(--color-white);
        border: none;
    }
    .sidebar-cta h3 { color: var(--color-white); }
    .sidebar-cta h3 i { color: var(--color-secondary); }
    .sidebar-cta p {
        color: rgba(232,237,245,0.8);
        font-size: 0.9rem;
        margin-bottom: 20px;
    }
    .sidebar-cta .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        background: var(--color-secondary);
        color: var(--color-primary);
        font-weight: 700;
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        text-decoration: none;
    }
    .sidebar-cta .btn:hover {
        background: #e0b84a;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(212,168,67,0.3);
    }

    /* ===== 内容未找到 ===== */
    .not-found-section {
        padding: 120px 0;
        text-align: center;
        background: var(--color-white);
    }
    .not-found-section .not-found-icon {
        font-size: 4rem;
        color: var(--color-text-lighter);
        margin-bottom: 24px;
    }
    .not-found-section h2 {
        font-size: 2rem;
        margin-bottom: 16px;
        color: var(--color-text);
    }
    .not-found-section p {
        color: var(--color-text-light);
        margin-bottom: 32px;
        font-size: 1.1rem;
    }
    .not-found-section .btn-home {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 36px;
        background: var(--color-secondary);
        color: var(--color-primary);
        font-weight: 700;
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        text-decoration: none;
    }
    .not-found-section .btn-home:hover {
        background: #e0b84a;
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    /* ===== 相关推荐 ===== */
    .related-section {
        padding: 70px 0;
        background: var(--color-bg);
    }
    .related-section .section-header {
        text-align: center;
        margin-bottom: 48px;
    }
    .related-section .section-header h2 {
        font-size: 2rem;
        font-weight: 800;
        color: var(--color-primary);
    }
    .related-section .section-header p {
        color: var(--color-text-light);
        margin-top: 8px;
        font-size: 1.05rem;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .related-card {
        background: var(--color-white);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border);
        transition: all var(--transition);
    }
    .related-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .related-card .card-image {
        height: 200px;
        overflow: hidden;
    }
    .related-card .card-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .related-card:hover .card-image img { transform: scale(1.05); }
    .related-card .card-body {
        padding: 22px 24px 26px;
    }
    .related-card .card-body h3 {
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 8px;
        color: var(--color-text);
    }
    .related-card .card-body p {
        font-size: 0.9rem;
        color: var(--color-text-light);
        margin-bottom: 14px;
        line-height: 1.6;
    }
    .related-card .card-body .card-meta {
        font-size: 0.8rem;
        color: var(--color-text-lighter);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .related-card .card-body .card-meta i { color: var(--color-secondary); }

    /* ===== FAQ ===== */
    .faq-section {
        padding: 70px 0;
        background: var(--color-white);
    }
    .faq-section .section-header {
        text-align: center;
        margin-bottom: 48px;
    }
    .faq-section .section-header h2 {
        font-size: 2rem;
        font-weight: 800;
        color: var(--color-primary);
    }
    .faq-section .section-header p {
        color: var(--color-text-light);
        margin-top: 8px;
        font-size: 1.05rem;
    }
    .faq-grid {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--color-secondary); }
    .faq-item summary {
        padding: 18px 24px;
        font-size: 1rem;
        font-weight: 600;
        color: var(--color-text);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        list-style: none;
        transition: background var(--transition);
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 0.85rem;
        color: var(--color-secondary);
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-item[open] summary::after { transform: rotate(180deg); }
    .faq-item[open] summary {
        background: rgba(212,168,67,0.05);
        border-bottom: 1px solid var(--color-border);
    }
    .faq-item .faq-answer {
        padding: 20px 24px;
        font-size: 0.95rem;
        line-height: 1.7;
        color: var(--color-text-light);
        background: var(--color-bg-alt);
    }

    /* ===== CTA ===== */
    .cta-section {
        padding: 80px 0;
        background: var(--color-bg-dark) url('/assets/images/backpic/back-2.webp') no-repeat center center / cover;
        position: relative;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11,18,25,0.85) 0%, rgba(15,25,35,0.75) 100%);
        z-index: 1;
    }
    .cta-section .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--color-white);
        margin-bottom: 16px;
    }
    .cta-section p {
        font-size: 1.1rem;
        color: rgba(232,237,245,0.8);
        max-width: 600px;
        margin: 0 auto 36px;
    }
    .cta-section .cta-buttons {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .cta-section .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 16px 40px;
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--color-primary);
        background: linear-gradient(135deg, var(--color-secondary), #b8942e);
        border-radius: var(--radius-sm);
        box-shadow: 0 4px 20px rgba(212,168,67,0.35);
        transition: all var(--transition);
        text-decoration: none;
    }
    .cta-section .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 12px 32px rgba(212,168,67,0.45);
        background: linear-gradient(135deg, #e0b84a, #c49a35);
    }
    .cta-section .btn-outline {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 16px 40px;
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--color-white);
        border: 2px solid rgba(232,237,245,0.3);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        text-decoration: none;
    }
    .cta-section .btn-outline:hover {
        border-color: var(--color-secondary);
        color: var(--color-secondary);
        background: rgba(212,168,67,0.08);
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--color-primary);
        color: rgba(232,237,245,0.75);
        padding: 60px 0 30px;
    }
    .site-footer .logo { margin-bottom: 16px; }
    .site-footer .logo span { color: var(--color-secondary); }
    .site-footer p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 36px;
        border-bottom: 1px solid rgba(232,237,245,0.1);
        margin-bottom: 28px;
    }
    .footer-grid h4 {
        font-size: 1rem;
        font-weight: 700;
        color: var(--color-white);
        margin-bottom: 18px;
    }
    .footer-grid ul li { margin-bottom: 10px; }
    .footer-grid ul li a {
        font-size: 0.9rem;
        color: rgba(232,237,245,0.65);
        transition: all var(--transition);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .footer-grid ul li a:hover { color: var(--color-secondary); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(232,237,245,0.5);
    }
    .footer-bottom a { color: var(--color-secondary); }
    .footer-bottom a:hover { text-decoration: underline; }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; }
        .article-sidebar { display: none; }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); }
        .article-hero h1 { font-size: 2.5rem; }
    }
    @media (max-width: 768px) {
        :root { --header-height: 64px; }
        .nav-list {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(15,25,35,0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 16px 24px;
            gap: 4px;
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border-bottom: 1px solid rgba(212,168,67,0.15);
            pointer-events: none;
        }
        .nav-list.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .nav-list li a {
            padding: 14px 18px;
            font-size: 1rem;
            width: 100%;
            text-align: center;
        }
        .nav-list li a.active::after { display: none; }
        .nav-list li a.nav-cta { margin-top: 8px; text-align: center; }
        .nav-toggle { display: flex; }
        .article-hero {
            min-height: 380px;
        }
        .article-hero h1 { font-size: 1.8rem; }
        .article-hero .hero-desc { font-size: 1rem; }
        .article-hero-meta { gap: 8px 16px; }
        .article-main { padding: 40px 0; }
        .related-grid { grid-template-columns: 1fr; }
        .cta-section h2 { font-size: 1.6rem; }
        .cta-section p { font-size: 1rem; }
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-hero h1 { font-size: 1.5rem; }
        .article-hero .hero-desc { font-size: 0.9rem; }
        .article-body { font-size: 0.98rem; }
        .related-section .section-header h2 { font-size: 1.5rem; }
        .faq-section .section-header h2 { font-size: 1.5rem; }
        .cta-section .btn-primary,
        .cta-section .btn-outline { width: 100%; justify-content: center; }
    }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a0e17;
            --primary-light: #141a26;
            --primary-mid: #1a2235;
            --secondary: #ff6b35;
            --secondary-hover: #e85a2a;
            --accent: #ffd700;
            --accent-soft: rgba(255, 215, 0, 0.12);
            --text: #f0f0f5;
            --text-muted: #8892a4;
            --text-dim: #5a6378;
            --border: #1e2a3a;
            --border-light: #2a3650;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container: 1200px;
            --nav-height: 72px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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: 1.65;
            color: var(--text);
            background: var(--primary);
            min-width: 320px;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--nav-height);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text);
            font-family: var(--font-display);
            transition: opacity var(--transition);
            flex-shrink: 0;
        }

        .logo:hover {
            opacity: 0.85;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #0a0e17;
            flex-shrink: 0;
        }

        .logo span:last-child {
            color: var(--accent);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list li a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-list li a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-list li a.active {
            color: var(--accent);
            background: var(--accent-soft);
        }

        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-hover)) !important;
            color: #fff !important;
            font-weight: 600 !important;
            padding: 8px 24px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
            transition: all var(--transition) !important;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.45) !important;
            background: linear-gradient(135deg, #ff7a4a, #e85a2a) !important;
        }

        .nav-cta.active {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-hover)) !important;
            color: #fff !important;
        }

        .nav-cta.active::after {
            display: none;
        }

        /* Mobile menu toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
            transform-origin: center;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
            }

            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }

            .nav-list li a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                justify-content: center;
            }

            .nav-list li a.active::after {
                bottom: 4px;
            }

            .nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
        }

        @media (max-width: 420px) {
            .logo {
                font-size: 18px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding: calc(var(--nav-height) + 40px) 0 80px;
            overflow: hidden;
            background: var(--primary);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            transform: scale(1.05);
            transition: transform 8s ease;
        }

        .hero:hover .hero-bg {
            transform: scale(1);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(10, 14, 23, 0.92) 0%,
                    rgba(10, 14, 23, 0.7) 40%,
                    rgba(10, 14, 23, 0.5) 70%,
                    rgba(10, 14, 23, 0.85) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 720px;
            animation: heroFadeIn 1.2s ease forwards;
        }

        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 100px;
            background: var(--accent-soft);
            border: 1px solid rgba(255, 215, 0, 0.2);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            animation: heroFadeIn 1s 0.2s both;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero-title {
            font-size: clamp(40px, 7vw, 72px);
            font-weight: 800;
            line-height: 1.08;
            letter-spacing: -1.5px;
            color: var(--text);
            margin-bottom: 20px;
            animation: heroFadeIn 1s 0.3s both;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: clamp(16px, 2vw, 20px);
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 600px;
            margin-bottom: 32px;
            animation: heroFadeIn 1s 0.45s both;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            animation: heroFadeIn 1s 0.6s both;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-hover));
            color: #fff;
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(255, 107, 53, 0.5);
        }

        .btn-primary:active {
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--text);
            border: 1.5px solid var(--border-light);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
            border-radius: var(--radius);
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        .btn .fa-arrow-right {
            transition: transform var(--transition);
        }

        .btn:hover .fa-arrow-right {
            transform: translateX(4px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            animation: heroFadeIn 1s 0.8s both;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hero-stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            letter-spacing: -0.5px;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 400;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 80vh;
                padding: calc(var(--nav-height) + 24px) 0 48px;
            }

            .hero-content {
                max-width: 100%;
            }

            .hero-stats {
                gap: 20px;
                margin-top: 32px;
                padding-top: 24px;
            }

            .hero-stat-number {
                font-size: 22px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
            }
        }

        @media (max-width: 420px) {
            .hero-stats {
                gap: 16px;
            }

            .hero-stat-item {
                min-width: calc(50% - 16px);
            }
        }

        /* ===== Section Base ===== */
        .section {
            padding: 90px 0;
        }

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

        .section-divider {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border), transparent);
            margin: 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 14px;
            border-radius: 100px;
            background: var(--accent-soft);
            border: 1px solid rgba(255, 215, 0, 0.15);
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.15;
            margin-bottom: 14px;
            color: var(--text);
        }

        .section-sub {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.65;
        }

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

        .section-header.centered {
            text-align: center;
        }

        .section-header.centered .section-sub {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Features / Cards Grid ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .feature-card:hover {
            border-color: var(--border-light);
            transform: translateY(-8px);
            box-shadow: var(--shadow);
        }

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

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 22px;
            margin-bottom: 18px;
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: rgba(255, 215, 0, 0.2);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        .feature-card .feature-img {
            margin-top: 20px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--primary);
        }

        .feature-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .feature-card:hover .feature-img img {
            transform: scale(1.04);
        }

        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .feature-card {
                padding: 24px 18px 22px;
            }
        }

        /* ===== Scenarios Grid ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 20px 24px;
            text-align: center;
            transition: all var(--transition);
        }

        .scenario-card:hover {
            border-color: var(--border-light);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }

        .scenario-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #0a0e17;
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .scenario-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .scenario-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 992px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 520px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 32px;
            left: calc(12.5% + 12px);
            right: calc(12.5% + 12px);
            height: 2px;
            background: linear-gradient(90deg, var(--secondary), var(--accent), var(--secondary));
            opacity: 0.25;
            z-index: 0;
        }

        .process-step {
            position: relative;
            z-index: 1;
            text-align: center;
            background: var(--primary);
            border-radius: var(--radius);
            padding: 28px 16px 24px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .process-step:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }

        .process-step .step-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.2), rgba(255, 215, 0, 0.15));
            border: 2px solid rgba(255, 215, 0, 0.2);
            font-size: 22px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 16px;
            transition: all var(--transition);
        }

        .process-step:hover .step-circle {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #0a0e17;
            border-color: transparent;
            transform: scale(1.06);
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.55;
        }

        @media (max-width: 992px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .process-grid::before {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Stats / Counters ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }

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

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .stat-number {
                font-size: 30px;
            }

            .stat-item {
                padding: 24px 12px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: background var(--transition);
            width: 100%;
            text-align: left;
            background: none;
            border: none;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-question .fa-chevron-down {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px;
                font-size: 13px;
            }

            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255, 107, 53, 0.08), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 215, 0, 0.06), transparent 60%);
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            padding: 60px 40px;
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(255, 215, 0, 0.04));
            border: 1px solid rgba(255, 215, 0, 0.1);
            border-radius: var(--radius-lg);
        }

        .cta-box h2 {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text);
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.65;
        }

        .cta-box .btn {
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-dim);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: clamp(34px, 6vw, 56px);
            }
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: clamp(26px, 5vw, 34px);
            }

            .hero-title {
                font-size: clamp(30px, 8vw, 42px);
            }

            .hero-sub {
                font-size: 15px;
            }
        }

        @media (max-width: 420px) {
            .hero-title {
                font-size: clamp(26px, 10vw, 34px);
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 15px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }

        .gap-sm {
            gap: 8px;
        }
        .gap-md {
            gap: 16px;
        }

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

        /* ===== Smooth reveal on scroll (simple) ===== */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-light);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-dim);
        }