/* roulang page: index */
/* ===== CSS Design Variables ===== */
        :root {
            --color-primary: #FF6B00;
            --color-primary-dark: #E05A00;
            --color-primary-light: #FF8533;
            --color-secondary: #1B1B2F;
            --color-secondary-light: #2A2A45;
            --color-accent: #FFD60A;
            --color-bg: #FFFFFF;
            --color-bg-alt: #F5F7FA;
            --color-bg-dark: #0F0F1A;
            --color-text: #2D3436;
            --color-text-light: #636E72;
            --color-text-inverse: #FFFFFF;
            --color-border: #E8ECF0;
            --color-border-light: #F0F2F5;
            --color-success: #00B894;
            --color-warning: #FDCB6E;
            --color-error: #E17055;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --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 12px 48px rgba(0,0,0,0.14);
            --shadow-hover: 0 16px 40px rgba(255,107,0,0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --nav-height: 72px;
        }

        /* ===== 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(--color-text);
            background: var(--color-bg);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-secondary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1em; }
        p:last-child { margin-bottom: 0; }

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

        /* ===== Utility ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--color-bg-alt); }
        .section-dark { background: var(--color-bg-dark); color: var(--color-text-inverse); }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 { color: var(--color-text-inverse); }
        .text-center { text-align: center; }
        .text-primary { color: var(--color-primary); }
        .mb-1 { margin-bottom: 12px; }
        .mb-2 { margin-bottom: 24px; }
        .mb-3 { margin-bottom: 40px; }
        .mt-2 { margin-top: 24px; }
        .mt-3 { margin-top: 40px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 36px;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            box-shadow: 0 4px 16px rgba(255,107,0,0.35);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255,107,0,0.45);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(255,107,0,0.3); }
        .btn-secondary {
            background: transparent;
            color: var(--color-text-inverse);
            border-color: rgba(255,255,255,0.5);
        }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.12);
            border-color: var(--color-text-inverse);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255,107,0,0.3);
        }
        .btn-lg { padding: 18px 48px; font-size: 1.15rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn i { font-size: 1.1em; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(255,107,0,0.12);
            color: var(--color-primary);
            letter-spacing: 0.3px;
        }
        .badge-white { background: rgba(255,255,255,0.18); color: var(--color-text-inverse); }
        .badge-success { background: rgba(0,184,148,0.12); color: var(--color-success); }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            font-size: 0.75rem;
            border-radius: 4px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .tag:hover { border-color: var(--color-primary); color: var(--color-primary); }

        /* ===== Card ===== */
        .card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(255,107,0,0.15);
        }
        .card-image { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--color-secondary); }
        .card-text { font-size: 0.92rem; color: var(--color-text-light); line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--color-text-light); margin-top: 12px; }
        .card-meta i { margin-right: 4px; }

        /* ===== Grid ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(15, 15, 26, 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(15, 15, 26, 0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-inverse);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo i { color: var(--color-primary); font-size: 1.6rem; }
        .site-logo span { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            letter-spacing: 0.2px;
        }
        .nav-list a:hover { color: var(--color-text-inverse); background: rgba(255,255,255,0.08); }
        .nav-list a.active { color: var(--color-text-inverse); background: rgba(255,107,0,0.2); }
        .nav-list a i { margin-right: 6px; font-size: 0.85rem; }
        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-right .btn { padding: 10px 24px; font-size: 0.88rem; border-radius: var(--radius-sm); }

        /* Mobile toggle */
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--color-text-inverse); padding: 8px; cursor: pointer; border-radius: var(--radius-sm); }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: var(--color-bg-dark);
            padding-top: var(--nav-height);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,26,0.88) 0%, rgba(15,15,26,0.50) 50%, rgba(255,107,0,0.10) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 60px var(--container-pad);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-text .badge { margin-bottom: 20px; }
        .hero-text h1 {
            font-size: 3.4rem;
            font-weight: 900;
            color: var(--color-text-inverse);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero-text h1 .highlight { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-text p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual-box {
            width: 100%;
            max-width: 480px;
            aspect-ratio: 4/3;
            border-radius: var(--radius-lg);
            background: rgba(255,107,0,0.08);
            border: 1px solid rgba(255,107,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }
        .hero-visual-box img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); }
        .hero-visual-box::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(255,107,0,0.10), transparent 60%);
            pointer-events: none;
        }
        .hero-stats {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: var(--color-secondary);
            border-radius: var(--radius-md);
            padding: 16px 24px;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255,255,255,0.06);
            display: flex;
            gap: 28px;
            backdrop-filter: blur(8px);
        }
        .hero-stats-item { text-align: center; }
        .hero-stats-item .num { font-size: 1.4rem; font-weight: 800; color: var(--color-accent); }
        .hero-stats-item .label { font-size: 0.75rem; color: rgba(255,255,255,0.6); margin-top: 2px; }

        /* ===== Features Section ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); border-color: rgba(255,107,0,0.12); }
        .feature-icon {
            width: 64px; height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            background: rgba(255,107,0,0.10);
            color: var(--color-primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { background: var(--color-primary); color: var(--color-text-inverse); }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.92rem; color: var(--color-text-light); }

        /* ===== Category Section ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 16/10;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--color-border-light);
        }
        .category-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .category-card:hover img { transform: scale(1.05); }
        .category-card-overlay {
            position: relative;
            width: 100%;
            padding: 28px 24px;
            background: linear-gradient(transparent, rgba(15,15,26,0.85));
            color: var(--color-text-inverse);
        }
        .category-card-overlay h3 { color: var(--color-text-inverse); font-size: 1.25rem; margin-bottom: 4px; }
        .category-card-overlay p { font-size: 0.85rem; opacity: 0.8; margin: 0; }
        .category-card .badge { position: absolute; top: 16px; left: 16px; z-index: 2; }

        /* ===== Stats / Numbers ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
        .stat-item { text-align: center; padding: 32px 16px; }
        .stat-item .num { font-size: 2.8rem; font-weight: 900; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .stat-item .label { font-size: 0.95rem; color: var(--color-text-light); margin-top: 6px; font-weight: 500; }
        .stat-item .desc { font-size: 0.82rem; color: var(--color-text-light); opacity: 0.7; margin-top: 4px; }

        /* ===== News / CMS List ===== */
        .news-card { display: flex; gap: 24px; background: var(--color-bg); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border-light); transition: var(--transition); }
        .news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: rgba(255,107,0,0.10); }
        .news-card-image { width: 240px; min-height: 160px; flex-shrink: 0; }
        .news-card-image img { width: 100%; height: 100%; object-fit: cover; }
        .news-card-body { padding: 20px 24px 20px 0; display: flex; flex-direction: column; justify-content: center; flex: 1; }
        .news-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .news-card-body h3 a { color: var(--color-secondary); }
        .news-card-body h3 a:hover { color: var(--color-primary); }
        .news-card-body p { font-size: 0.88rem; color: var(--color-text-light); margin-bottom: 10px; }
        .news-card .card-meta { margin-top: auto; }
        .news-empty { text-align: center; padding: 40px 20px; color: var(--color-text-light); font-size: 1rem; background: var(--color-bg-alt); border-radius: var(--radius-md); }

        /* ===== Steps / Process ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; counter-reset: step; }
        .step-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
            position: relative;
            text-align: center;
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .step-number {
            width: 52px; height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 18px;
            background: var(--color-primary);
            color: var(--color-text-inverse);
            box-shadow: 0 6px 20px rgba(255,107,0,0.25);
        }
        .step-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--color-text-light); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(255,107,0,0.15); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            gap: 16px;
            color: var(--color-secondary);
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--color-primary); }
        .faq-question i { font-size: 0.85rem; color: var(--color-text-light); transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--color-primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta-content { position: relative; z-index: 1; }
        .cta-section h2 { color: var(--color-text-inverse); font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn { font-size: 1.08rem; padding: 16px 44px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .site-logo { font-size: 1.2rem; margin-bottom: 12px; display: inline-flex; }
        .footer-brand p { font-size: 0.88rem; max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: var(--color-text-inverse); font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.88rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--color-primary); }
        .footer-bottom { padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: rgba(255,255,255,0.35); }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--color-primary); }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 40px; height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover { background: var(--color-primary); color: var(--color-text-inverse); }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 30px; right: 30px;
            z-index: 999;
            width: 48px; height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            transform: translateY(20px);
        }
        .scroll-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
        .scroll-top:hover { background: var(--color-primary-dark); transform: translateY(-4px); box-shadow: var(--shadow-lg); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; }
            .hero-text p { margin: 0 auto 32px; }
            .hero-actions { justify-content: center; }
            .hero-text h1 { font-size: 2.8rem; }
            .hero-visual-box { max-width: 400px; margin: 0 auto; }
            .hero-stats { left: 50%; transform: translateX(-50%); bottom: -24px; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            :root { --container-pad: 16px; --nav-height: 64px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .section { padding: 56px 0; }
            .nav-list { display: none; }
            .nav-toggle { display: block; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height); left: 0; right: 0;
                background: rgba(15,15,26,0.98);
                backdrop-filter: blur(16px);
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .nav-list.open a { padding: 12px 16px; width: 100%; }
            .header-right .btn span { display: none; }
            .header-right .btn i { margin: 0; }
            .header-right .btn { padding: 10px 16px; }
            .hero { min-height: auto; padding: 100px 0 60px; }
            .hero-text h1 { font-size: 2.2rem; }
            .hero-text p { font-size: 1rem; }
            .hero-content { padding: 40px var(--container-pad); }
            .hero-stats { position: relative; bottom: 0; left: 0; transform: none; margin-top: 20px; justify-content: center; }
            .hero-visual-box { max-width: 100%; aspect-ratio: 16/10; }
            .features-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item .num { font-size: 2rem; }
            .news-card { flex-direction: column; }
            .news-card-image { width: 100%; height: 200px; }
            .news-card-body { padding: 16px 20px; }
            .steps-grid { grid-template-columns: 1fr; }
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.5rem; }
        }

        @media (max-width: 480px) {
            .hero-text h1 { font-size: 1.8rem; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
            .btn-lg { padding: 14px 32px; font-size: 1rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .stat-item { padding: 20px 12px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #EEF2FF;
            --secondary: #7C3AED;
            --accent: #F59E0B;
            --dark: #0F172A;
            --dark-soft: #1E293B;
            --gray-900: #1E293B;
            --gray-700: #334155;
            --gray-500: #64748B;
            --gray-300: #CBD5E1;
            --gray-100: #F1F5F9;
            --bg-light: #FAFBFC;
            --white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== 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(--gray-700);
            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); }
        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 { color: var(--dark); line-height: 1.3; font-weight: 700; }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }
        section { padding: 72px 0; }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        .section-title { text-align: center; margin-bottom: 12px; }
        .section-subtitle {
            text-align: center;
            color: var(--gray-500);
            max-width: 640px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--white) !important;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79,70,229,0.35);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary) !important;
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--white) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79,70,229,0.20);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.9rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(203,213,225,0.4);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--dark) !important;
            letter-spacing: -0.3px;
        }
        .site-logo i { color: var(--primary); font-size: 1.5rem; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--gray-500);
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i { font-size: 0.9rem; opacity: 0.6; }
        .nav-list a:hover { color: var(--dark); background: var(--gray-100); }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-list a.active i { opacity: 1; }
        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-toggle { display: none; font-size: 1.4rem; color: var(--dark); padding: 4px 8px; border-radius: 6px; }
        .nav-toggle:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--dark-soft);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--white);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,41,59,0.60) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: var(--white); opacity: 1; }
        .article-breadcrumb .sep { opacity: 0.4; }
        .article-banner .article-category {
            display: inline-block;
            background: var(--primary);
            color: var(--white);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .article-banner h1 {
            color: var(--white);
            font-size: 2.6rem;
            max-width: 800px;
            line-height: 1.25;
            margin-bottom: 16px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.15);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.75);
        }
        .article-meta i { margin-right: 4px; opacity: 0.6; }
        .article-meta span { display: flex; align-items: center; }

        /* ===== Article Content ===== */
        .article-content-wrap {
            padding: 56px 0 64px;
            background: var(--white);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--gray-700);
        }
        .article-body p {
            margin-bottom: 1.6em;
        }
        .article-body h2, .article-body h3 {
            margin-top: 2em;
            margin-bottom: 0.8em;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.6em;
            padding-left: 1.6em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-md);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--gray-700);
        }
        .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--gray-100);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--gray-100);
            color: var(--gray-500);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-light); color: var(--primary); }

        /* ===== Article Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 64px 24px;
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 3rem; color: var(--gray-300); margin-bottom: 16px; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--gray-500); margin-bottom: 24px; }

        /* ===== Related Articles ===== */
        .related-wrap {
            background: var(--bg-light);
            padding: 64px 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            background-color: var(--gray-100);
        }
        .related-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
            flex: 1;
        }
        .related-card h3 a { color: var(--dark); }
        .related-card h3 a:hover { color: var(--primary); }
        .related-card .card-meta {
            font-size: 0.8rem;
            color: var(--gray-500);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--dark-soft);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 72px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.70) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: var(--white); font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
        .cta-section .btn { font-size: 1.1rem; padding: 16px 40px; }
        .cta-section .btn i { font-size: 1.1rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 52px 0 0;
        }
        .site-footer .site-logo { color: var(--white) !important; margin-bottom: 12px; }
        .site-footer .site-logo i { color: var(--primary); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; color: rgba(255,255,255,0.55); }
        .footer-col h4 {
            color: var(--white);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--white); }
        .footer-col ul li i { opacity: 0.4; }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5) !important;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover { background: var(--primary); color: var(--white) !important; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }

        /* ===== Article Not Found State ===== */
        .article-missing {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 60px 24px;
            text-align: center;
        }
        .article-missing i { font-size: 3.2rem; color: var(--gray-300); margin-bottom: 16px; }
        .article-missing h2 { color: var(--dark); margin-bottom: 12px; }
        .article-missing p { color: var(--gray-500); margin-bottom: 24px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-banner h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid var(--gray-100);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-toggle { display: block; }
            .header-left { gap: 16px; }
            section { padding: 48px 0; }
            .article-banner { padding: 56px 0 44px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-content-wrap { padding: 40px 0 48px; }
            .article-body { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .section-subtitle { margin-bottom: 32px; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.5rem; }
            .article-meta { font-size: 0.8rem; gap: 12px; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
            .site-logo span { font-size: 1.1rem; }
            .header-right .btn span { display: none; }
            .related-card .card-img { height: 160px; }
        }
        @media (min-width: 769px) {
            .nav-list { display: flex !important; transform: none !important; opacity: 1 !important; pointer-events: auto !important; position: static !important; box-shadow: none !important; backdrop-filter: none !important; background: transparent !important; padding: 0 !important; border: none !important; }
        }

        /* ===== Focus visible ===== */
        :focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

        /* ===== Smooth image loading ===== */
        .card-img { background-size: cover; background-position: center; background-repeat: no-repeat; }

/* roulang page: category1 */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f1f33;
            --secondary: #e8792b;
            --secondary-light: #f09a4a;
            --secondary-dark: #c9621a;
            --accent: #f0c040;
            --accent-light: #f5d870;
            --bg: #f5f7fa;
            --bg-alt: #eef1f5;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #4a4a5a;
            --text-muted: #7a7a8a;
            --border: #e0e3e8;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --max-width: 1200px;
            --header-h: 68px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary-dark);
        }
        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 121, 43, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(232, 121, 43, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 58, 92, 0.25);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-md);
        }
        .btn .fa-spinner {
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--accent);
            color: var(--primary-dark);
        }
        .badge-blue {
            background: var(--primary-light);
            color: #fff;
        }
        .badge-orange {
            background: var(--secondary);
            color: #fff;
        }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 站点头部 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(224, 227, 232, 0.5);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.9;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-list a.active {
            color: var(--primary-dark);
            font-weight: 700;
            background: rgba(26, 58, 92, 0.08);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--secondary);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-right .btn {
            border-radius: var(--radius-sm);
        }
        .nav-toggle {
            display: none;
            padding: 8px 12px;
            font-size: 1.4rem;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== Hero / 横幅 ===== */
        .category-hero {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
        }
        .category-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero .badge {
            margin-bottom: 16px;
            font-size: 0.85rem;
            padding: 6px 20px;
        }
        .category-hero h1 {
            color: #fff;
            font-size: 2.8rem;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .category-hero .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .category-hero .btn {
            border-radius: var(--radius-sm);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-white {
            background: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            border-radius: 2px;
            background: var(--secondary);
            margin: 12px auto 0;
        }
        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
            color: var(--text-muted);
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            border: 1px solid var(--border);
            text-align: center;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--secondary-light);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 16px;
            transition: background var(--transition);
        }
        .step-card:hover .step-num {
            background: var(--secondary);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 注册方式卡片 ===== */
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .method-card .method-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary);
            margin: 0 auto 18px;
            transition: all var(--transition);
        }
        .method-card:hover .method-icon {
            background: var(--primary);
            color: #fff;
        }
        .method-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .method-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .method-card .badge {
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--secondary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== 注意事项 ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .tip-card {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .tip-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
            border-color: var(--accent);
        }
        .tip-card .tip-icon {
            font-size: 1.6rem;
            color: var(--secondary);
            flex-shrink: 0;
            width: 40px;
            text-align: center;
            margin-top: 2px;
        }
        .tip-card h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .tip-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary-dark);
            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: 0.12;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn {
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            padding: 16px 44px;
        }
        .cta-section .btn i {
            font-size: 1.1rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            border-top: 4px solid var(--secondary);
        }
        .site-footer .site-logo span {
            background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.7));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .site-logo i {
            color: var(--secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            margin-top: 16px;
            max-width: 320px;
            line-height: 1.8;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 700;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-col ul li i {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.2rem;
            transition: all var(--transition);
        }
        .footer-socials a:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0 30px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom span:last-child {
            opacity: 0.6;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 16px 0 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            opacity: 0.4;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 2.3rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 60px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: var(--bg-alt);
            }
            .nav-toggle {
                display: block;
            }
            .header-right .btn span {
                display: none;
            }
            .header-right .btn {
                padding: 8px 14px;
            }
            .category-hero {
                padding: 60px 0 48px;
                min-height: 260px;
            }
            .category-hero h1 {
                font-size: 1.9rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 24px 20px;
            }
            .methods-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .method-card {
                padding: 28px 20px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tip-card {
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 20px 0 24px;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .category-hero .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .section-header h2::after {
                width: 36px;
            }
            .step-card .step-num {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .method-card .method-icon {
                width: 60px;
                height: 60px;
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 动效 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }