/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1E4D7A;
            --primary-light: #2A6FAF;
            --primary-dark: #143550;
            --secondary: #E8832A;
            --secondary-light: #F5A623;
            --accent: #F7C948;
            --bg: #F7F9FC;
            --bg-alt: #EDF1F7;
            --bg-dark: #0F2A3F;
            --text: #1A202C;
            --text-light: #4A5568;
            --text-muted: #8896AB;
            --text-white: #F8FAFC;
            --border: #DCE2EC;
            --border-light: #EDF2F7;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.04);
            --spacing: 1.5rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --nav-height: 72px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 0.75rem; color: var(--text-light); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--secondary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.75rem 2rem; border-radius: 50px; font-weight: 600;
            font-size: 1rem; line-height: 1.4; transition: 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-light); border-color: var(--secondary-light);
            transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232, 131, 42, 0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: none; }
        .btn-outline {
            background: transparent; color: var(--text-white); border-color: var(--text-white);
        }
        .btn-outline:hover {
            background: var(--text-white); color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-outline:active { transform: translateY(0); }
        .btn-light {
            background: #fff; color: var(--primary); border-color: #fff;
        }
        .btn-light:hover {
            background: var(--bg); transform: translateY(-2px); box-shadow: var(--shadow-hover);
        }
        .btn-light:active { transform: translateY(0); }
        .btn-lg { padding: 1rem 2.8rem; font-size: 1.1rem; }

        /* ===== Badges & Tags ===== */
        .badge {
            display: inline-flex; align-items: center; gap: 0.35rem;
            padding: 0.25rem 0.85rem; border-radius: 50px; font-size: 0.8rem;
            font-weight: 600; background: rgba(30, 77, 122, 0.08); color: var(--primary);
        }
        .badge-secondary { background: rgba(232, 131, 42, 0.12); color: var(--secondary); }
        .badge-success { background: rgba(56, 161, 105, 0.12); color: #2F855A; }
        .tag {
            display: inline-block; padding: 0.2rem 0.7rem; border-radius: var(--radius-sm);
            font-size: 0.75rem; font-weight: 500; background: var(--border-light); color: var(--text-light);
            transition: var(--transition);
        }
        .tag:hover { background: var(--primary); color: #fff; }

        /* ===== Cards ===== */
        .card {
            background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-card);
            padding: 1.5rem; transition: var(--transition); border: 1px solid var(--border-light);
        }
        .card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .card-image {
            border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 1rem;
        }
        .card-image img { width: 100%; height: 200px; object-fit: cover; transition: var(--transition); }
        .card:hover .card-image img { transform: scale(1.04); }
        .card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
        .card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
        .card-footer { margin-top: 1rem; display: flex; align-items: center; justify-content: space-between; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light); height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(255, 255, 255, 0.98); box-shadow: 0 2px 20px rgba(0,0,0,0.06); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--nav-height); padding: 0 1.5rem; max-width: 1200px; margin: 0 auto;
        }
        .logo { font-size: 1.35rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; display: flex; align-items: center; gap: 0.5rem; }
        .logo i { color: var(--secondary); font-size: 1.5rem; }
        .logo span { color: var(--text); }
        .nav-list { display: flex; align-items: center; gap: 0.25rem; }
        .nav-list a {
            padding: 0.4rem 1.1rem; border-radius: 50px; font-size: 0.9rem; font-weight: 500;
            color: var(--text-light); transition: var(--transition); position: relative;
        }
        .nav-list a:hover { color: var(--primary); background: rgba(30, 77, 122, 0.06); }
        .nav-list a.active { color: #fff; background: var(--primary); }
        .nav-cta {
            padding: 0.4rem 1.3rem; border-radius: 50px; font-size: 0.9rem; font-weight: 600;
            background: var(--secondary); color: #fff; transition: var(--transition);
        }
        .nav-cta:hover { background: var(--secondary-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232,131,42,0.3); }
        .mobile-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 0.25rem; }

        /* ===== Hero ===== */
        .hero {
            min-height: 92vh; display: flex; align-items: center; position: relative;
            background: linear-gradient(135deg, #0F2A3F 0%, #1E4D7A 60%, #2A6FAF 100%);
            overflow: hidden; padding-top: var(--nav-height);
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute; inset: 0; z-index: 1;
            background: radial-gradient(ellipse at 30% 50%, rgba(30,77,122,0.6) 0%, transparent 70%);
        }
        .hero-content {
            position: relative; z-index: 2; max-width: 820px; padding: 3rem 1.5rem;
        }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.35rem 1.2rem; border-radius: 50px; font-size: 0.85rem; font-weight: 600;
            background: rgba(255,255,255,0.12); color: var(--text-white); backdrop-filter: blur(4px);
            margin-bottom: 1.5rem;
        }
        .hero h1 {
            font-size: 3.2rem; font-weight: 800; color: var(--text-white);
            margin-bottom: 1.2rem; letter-spacing: -0.02em; line-height: 1.15;
        }
        .hero h1 span { color: var(--secondary-light); }
        .hero p {
            font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 600px;
            margin-bottom: 2rem; line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
        .hero-stats {
            display: flex; gap: 2.5rem; margin-top: 3rem; padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.15);
        }
        .hero-stat { text-align: left; }
        .hero-stat strong { font-size: 1.8rem; font-weight: 800; color: var(--text-white); display: block; }
        .hero-stat span { font-size: 0.85rem; color: rgba(255,255,255,0.6); }

        /* ===== Section Common ===== */
        .section { padding: var(--spacing-xl) 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-header { text-align: center; margin-bottom: var(--spacing-lg); max-width: 720px; margin-left: auto; margin-right: auto; }
        .section-header h2 { font-size: 2.2rem; margin-bottom: 0.75rem; }
        .section-header p { font-size: 1.05rem; color: var(--text-muted); }
        .section-dark .section-header h2 { color: var(--text-white); }
        .section-dark .section-header p { color: rgba(255,255,255,0.65); }

        /* ===== Features Grid ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
        .feature-card {
            background: #fff; border-radius: var(--radius); padding: 2rem 1.75rem;
            box-shadow: var(--shadow-card); border: 1px solid var(--border-light);
            transition: var(--transition); text-align: center;
        }
        .feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
        .feature-icon {
            width: 64px; height: 64px; border-radius: 16px;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 1.25rem; font-size: 1.75rem; color: #fff;
        }
        .feature-icon.blue { background: var(--primary); }
        .feature-icon.orange { background: var(--secondary); }
        .feature-icon.teal { background: #2C7A7B; }
        .feature-icon.purple { background: #6B46C1; }
        .feature-icon.green { background: #2F855A; }
        .feature-icon.red { background: #C53030; }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
        .feature-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Login Methods ===== */
        .methods-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
        .method-card {
            display: flex; gap: 1.25rem; background: #fff; border-radius: var(--radius);
            padding: 1.75rem; box-shadow: var(--shadow-card); border: 1px solid var(--border-light);
            transition: var(--transition); align-items: flex-start;
        }
        .method-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .method-icon {
            flex-shrink: 0; width: 52px; height: 52px; border-radius: 14px;
            display: flex; align-items: center; justify-content: center;
            background: rgba(30,77,122,0.08); color: var(--primary); font-size: 1.4rem;
        }
        .method-card h4 { font-size: 1.05rem; margin-bottom: 0.3rem; }
        .method-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== CMS / News List ===== */
        .news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
        .news-card {
            background: #fff; border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow-card); border: 1px solid var(--border-light);
            transition: var(--transition); display: flex; flex-direction: column;
        }
        .news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .news-card .card-image { margin-bottom: 0; border-radius: 0; height: 180px; }
        .news-card .card-image img { height: 180px; }
        .news-card-body { padding: 1.25rem 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .news-card-body h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
        .news-card-body p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.75rem; flex: 1; }
        .news-meta {
            display: flex; align-items: center; gap: 0.75rem; font-size: 0.78rem; color: var(--text-muted);
        }
        .news-meta .tag { font-size: 0.7rem; }
        .news-empty {
            grid-column: 1 / -1; text-align: center; padding: 3rem 1rem;
            background: #fff; border-radius: var(--radius); color: var(--text-muted);
            font-size: 0.95rem; border: 1px dashed var(--border);
        }

        /* ===== Process / Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .step-card {
            text-align: center; padding: 2rem 1.25rem; background: #fff;
            border-radius: var(--radius); box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light); transition: var(--transition);
            position: relative;
        }
        .step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .step-number {
            width: 48px; height: 48px; border-radius: 50%; display: flex;
            align-items: center; justify-content: center; margin: 0 auto 1rem;
            background: var(--primary); color: #fff; font-weight: 800; font-size: 1.2rem;
        }
        .step-card h4 { font-size: 1rem; margin-bottom: 0.4rem; }
        .step-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Security Section ===== */
        .security-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
        .security-item {
            background: rgba(255,255,255,0.06); border-radius: var(--radius);
            padding: 1.75rem; border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition); text-align: center;
        }
        .security-item:hover { background: rgba(255,255,255,0.10); transform: translateY(-3px); }
        .security-item i { font-size: 2rem; color: var(--secondary-light); margin-bottom: 1rem; }
        .security-item h4 { color: var(--text-white); font-size: 1.05rem; margin-bottom: 0.4rem; }
        .security-item p { color: rgba(255,255,255,0.6); font-size: 0.85rem; margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item {
            background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border-light);
            overflow: hidden; transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            padding: 1.1rem 1.5rem; display: flex; align-items: center; justify-content: space-between;
            cursor: pointer; font-weight: 600; font-size: 0.95rem; color: var(--text);
            transition: var(--transition); gap: 1rem;
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.5rem 1.1rem; font-size: 0.9rem; color: var(--text-light);
            line-height: 1.7; display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            border-radius: var(--radius-lg); padding: 3.5rem 3rem; text-align: center;
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover; background-position: center; opacity: 0.08;
        }
        .cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 0.75rem; position: relative; }
        .cta-section p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin-bottom: 1.75rem; position: relative; }
        .cta-section .btn { position: relative; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 3rem 0 1.5rem;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 0.75rem; }
        .footer-brand .logo span { color: var(--text-white); }
        .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.5); max-width: 300px; }
        .footer-col h5 { color: var(--text-white); font-size: 0.9rem; margin-bottom: 1rem; }
        .footer-col a {
            display: block; font-size: 0.85rem; color: rgba(255,255,255,0.55);
            padding: 0.25rem 0; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08); padding-top: 1.5rem;
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 0.75rem; font-size: 0.8rem; color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--secondary-light); }
        .footer-socials { display: flex; gap: 0.75rem; }
        .footer-socials a {
            width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.5); transition: var(--transition);
        }
        .footer-socials a:hover { background: var(--secondary); color: #fff; }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none; position: fixed; top: var(--nav-height); left: 0; width: 100%;
            background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light); padding: 1rem 1.5rem;
            box-shadow: var(--shadow); z-index: 999;
        }
        .mobile-nav.open { display: block; }
        .mobile-nav a {
            display: block; padding: 0.7rem 0; font-size: 1rem; font-weight: 500;
            color: var(--text-light); border-bottom: 1px solid var(--border-light);
        }
        .mobile-nav a:last-child { border-bottom: none; }
        .mobile-nav a.active { color: var(--primary); font-weight: 700; }
        .mobile-nav .nav-cta { display: inline-block; margin-top: 0.5rem; text-align: center; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .hero h1 { font-size: 2.6rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .security-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            :root { --spacing-xl: 3rem; --nav-height: 64px; }
            .nav-list { display: none; }
            .mobile-toggle { display: block; }
            .hero { min-height: 80vh; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
            .hero-stat strong { font-size: 1.4rem; }
            .features-grid { grid-template-columns: 1fr; }
            .methods-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .security-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .cta-section { padding: 2.5rem 1.5rem; }
            .cta-section h2 { font-size: 1.6rem; }
            .section-header h2 { font-size: 1.7rem; }
            .hero-actions { flex-direction: column; align-items: flex-start; }
            .hero-actions .btn { width: 100%; justify-content: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .hero h1 { font-size: 1.6rem; }
            .hero p { font-size: 0.9rem; }
            .hero-stats { gap: 1rem; }
            .hero-stat { flex: 1; }
            .hero-stat strong { font-size: 1.2rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a3f63;
            --primary-dark: #091b30;
            --accent: #f59e0b;
            --accent-hover: #d48a08;
            --accent-light: #fef3c7;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-light: #f1f5f9;
            --bg-dark: #0f2b4a;
            --text-primary: #0f1a2e;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f8fafc;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --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), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-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-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
        h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
        h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container { padding: 0 1rem; }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--primary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-list a {
            padding: 0.5rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: var(--primary); background: var(--bg-light); }
        .nav-list a.active { color: var(--primary); background: var(--bg-light); font-weight: 600; }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }
        .nav-list a.nav-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--primary); padding: 0.5rem; }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                gap: 0.25rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 0.75rem 1rem; font-size: 1.05rem; }
            .nav-list a.nav-cta { margin-left: 0; margin-top: 0.5rem; justify-content: center; }
            .nav-list a.active::after { display: none; }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            margin-top: var(--nav-height);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 70%, #1a4a6e 100%);
            overflow: hidden;
        }
        .page-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 3rem;
            padding-bottom: 3rem;
            text-align: center;
        }
        .page-hero-breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 1.25rem;
        }
        .page-hero-breadcrumb a { color: rgba(255,255,255,0.8); }
        .page-hero-breadcrumb a:hover { color: var(--accent); }
        .page-hero-breadcrumb span { color: rgba(255,255,255,0.5); }
        .page-hero h1 {
            color: #fff;
            font-size: clamp(1.6rem, 3.8vw, 2.6rem);
            max-width: 800px;
            margin: 0 auto 0.75rem;
            text-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .page-hero .meta-line {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.25rem;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
        }
        .page-hero .meta-line i { margin-right: 0.3rem; color: var(--accent); }
        .page-hero .meta-line .tag {
            background: rgba(255,255,255,0.15);
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            color: #fff;
        }

        /* ===== Main Content ===== */
        .article-main {
            padding: 3rem 0 4rem;
        }
        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body .article-content p {
            margin-bottom: 1.25rem;
            color: var(--text-secondary);
        }
        .article-body .article-content h2,
        .article-body .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
            color: var(--text-secondary);
        }
        .article-body .article-content ul { list-style: disc; }
        .article-body .article-content ol { list-style: decimal; }
        .article-body .article-content li { margin-bottom: 0.35rem; }
        .article-body .article-content img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: var(--accent-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-body .article-content a { color: var(--accent-hover); text-decoration: underline; }
        .article-body .article-content a:hover { color: var(--primary); }
        .article-not-found {
            text-align: center;
            padding: 4rem 2rem;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; }
        .article-not-found h2 { margin-bottom: 0.75rem; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 1.5rem; }
        .article-not-found .btn { display: inline-block; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
            display: inline-block;
        }
        .sidebar-card ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card ul li:last-child { border-bottom: none; }
        .sidebar-card ul li a {
            font-size: 0.92rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .sidebar-card ul li a:hover { color: var(--primary); }
        .sidebar-card ul li a i { color: var(--accent); font-size: 0.75rem; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border: none;
        }
        .sidebar-cta h4 { color: #fff; border-color: var(--accent); }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.92rem; margin-bottom: 1rem; }
        .sidebar-cta .btn {
            background: var(--accent);
            color: var(--primary);
            width: 100%;
            text-align: center;
        }
        .sidebar-cta .btn:hover { background: #fff; color: var(--primary); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-white);
            padding: 3.5rem 0;
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 2.5rem;
            position: relative;
        }
        .related-section h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 0.75rem auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; }
        .related-card-body { padding: 1.25rem; }
        .related-card-body h4 { font-size: 1.05rem; margin-bottom: 0.4rem; }
        .related-card-body h4 a { color: var(--text-primary); }
        .related-card-body h4 a:hover { color: var(--accent-hover); }
        .related-card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 3.5rem 0;
            background: var(--bg-light);
        }
        .faq-section h2 {
            text-align: center;
            margin-bottom: 2.5rem;
            position: relative;
        }
        .faq-section h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 0.75rem auto 0;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 1.15rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--bg-light); }
        .faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.15rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 4rem 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 1.75rem;
            font-size: 1.05rem;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.75rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
        }
        .btn-primary:hover { background: var(--accent-hover); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.35); }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.35);
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; transform: translateY(-2px); }
        .btn-lg { padding: 0.9rem 2.5rem; font-size: 1.1rem; border-radius: var(--radius-lg); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 0.75rem; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 340px; }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--accent); }
        .footer-socials { display: flex; gap: 0.75rem; }
        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-socials a:hover { background: var(--accent); color: var(--primary); transform: translateY(-2px); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-wrapper { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
        }
        @media (max-width: 768px) {
            .page-hero { min-height: 240px; }
            .page-hero .container { padding-top: 2rem; padding-bottom: 2rem; }
            .article-body { padding: 1.5rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-buttons { flex-direction: column; align-items: stretch; }
            .cta-buttons .btn { justify-content: center; }
        }
        @media (max-width: 520px) {
            .header-inner { padding: 0 1rem; }
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
            .page-hero h1 { font-size: 1.3rem; }
            .page-hero .meta-line { font-size: 0.82rem; gap: 0.75rem; flex-direction: column; }
            .article-body { padding: 1rem; border-radius: var(--radius-md); }
            .faq-question { padding: 0.9rem 1rem; font-size: 0.92rem; }
            .faq-item.active .faq-answer { padding: 0 1rem 0.9rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1f6e4a;
            --primary-dark: #155237;
            --primary-light: #d4edda;
            --primary-glow: rgba(31, 110, 74, 0.12);
            --accent: #e8a838;
            --accent-dark: #c98d2e;
            --accent-light: #fdf0d5;
            --bg-body: #f6f9f7;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-muted: #eef4f0;
            --text-primary: #1a2a1f;
            --text-secondary: #4a5a4f;
            --text-muted: #7a8a7f;
            --border-color: #dce6df;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px rgba(0, 20, 10, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 20, 10, 0.08);
            --shadow-lg: 0 14px 44px rgba(0, 20, 10, 0.10);
            --shadow-glow: 0 0 0 4px var(--primary-glow);
            --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --max-width: 1180px;
            --header-h: 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 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(--text-primary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Nav ===== */
        .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(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.85;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            background: var(--primary-glow);
            color: var(--primary-dark);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(31, 110, 74, 0.25);
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: #1a2a1f;
            font-weight: 600;
            padding: 8px 22px;
            box-shadow: 0 2px 12px rgba(232, 168, 56, 0.30);
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 168, 56, 0.35);
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            background: none;
            border: none;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-glow);
        }

        /* ===== Hero ===== */
        .hero {
            margin-top: var(--header-h);
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0f2a1e 0%, #1a4a34 40%, #0f3a28 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
            transform: scale(1.04);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(31, 110, 74, 0.30) 0%, transparent 70%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content {
            max-width: 780px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #d4edda;
            border: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 28px;
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5.2vw, 3.8rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            color: var(--accent);
            border-bottom: 3px solid var(--accent);
            display: inline-block;
            padding-bottom: 2px;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 34px;
            font-weight: 400;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--accent);
            color: #1a2a1f;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50px;
            box-shadow: 0 4px 18px rgba(232, 168, 56, 0.35);
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
            border: none;
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 168, 56, 0.40);
            color: #1a2a1f;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 30px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 50px;
            border: 1.5px solid rgba(255, 255, 255, 0.30);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 30px 50px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.60);
            margin-top: 2px;
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-muted);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 12px auto 0;
        }
        .section-title .badge-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

        /* ===== Cards Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            color: #fff;
        }
        .card-icon.green {
            background: var(--primary);
        }
        .card-icon.gold {
            background: var(--accent);
            color: #1a2a1f;
        }
        .card-icon.teal {
            background: #1a7a6a;
        }
        .card-icon.rose {
            background: #b84a5a;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .card .tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 12px;
        }

        /* ===== Feature /图文区块 ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-muted);
            aspect-ratio: 4/3;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .feature-text p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .feature-list li i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== Steps ===== */
        .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;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: "0" counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--primary-glow);
            line-height: 1;
            letter-spacing: -0.04em;
            opacity: 0.5;
        }
        .step-card .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 18px;
            transition: background var(--transition), transform var(--transition);
        }
        .step-card:hover .step-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.06);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* ===== Security Tips ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .tip-item:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .tip-item .tip-badge {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .tip-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .tip-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-glow);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, #0f2a1e 100%);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: clamp(1.5rem, 2.8vw, 2.2rem);
            color: #fff;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f1a14;
            color: rgba(255, 255, 255, 0.70);
            padding: 60px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo span {
            background: none;
            -webkit-text-fill-color: #fff;
            color: #fff;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.50);
            font-size: 1.1rem;
            padding: 0;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-socials a:hover {
            background: var(--accent);
            color: #1a2a1f;
            transform: translateY(-2px);
            padding-left: 0;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.40);
            padding: 0;
            display: inline;
        }
        .footer-bottom a:hover {
            color: var(--accent);
            padding-left: 0;
        }
        .footer-bottom span:last-child a {
            margin: 0 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 820px) {
            .feature-row {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-img {
                aspect-ratio: 16/9;
                order: -1;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: clamp(1.8rem, 5vw, 2.6rem);
            }
            .hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                justify-content: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav-list a.nav-cta {
                margin-top: 6px;
            }
            .nav-toggle {
                display: block;
            }
            .hero {
                min-height: 80vh;
            }
            .hero-stats {
                gap: 20px 30px;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
            .grid-3 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .section {
                padding: 50px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline-light {
                width: 100%;
                justify-content: center;
            }
            .hero-stat .num {
                font-size: 1.2rem;
            }
            .card {
                padding: 20px 18px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .container {
                padding: 0 16px;
            }
            .cta-section {
                padding: 50px 0;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== Smooth fade-in animation ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }