/* roulang page: index */
:root {
            --primary: #4A7C59;
            --secondary: #2A5A3A;
            --accent: #D4A373;
            --bg: #F9F8F6;
            --text: #1E1E1E;
            --subtext: #5A5A5A;
            --border: #E8E6E1;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-cta: 24px;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color 0.3s; }
        a:hover { color: #3A6A49; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
        @media (min-width: 768px) { .container { padding: 0 24px; } }

        /* Header / Nav */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 100;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: 72px;
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.08); }
        .header-inner {
            max-width: 1200px; margin: 0 auto; padding: 0 16px;
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 700; color: var(--primary); letter-spacing: 1px; }
        .logo-icon { width: 36px; height: 36px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 20px; font-weight: 700; }
        .logo span { color: var(--text); }
        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a {
            font-size: 15px; font-weight: 500; color: var(--text); position: relative;
            padding: 4px 0; transition: color 0.3s;
        }
        .nav-links a::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
            background: var(--primary); transition: width 0.3s ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after { width: 100%; }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a.active { color: var(--primary); }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { width: 28px; height: 3px; background: var(--text); border-radius: 2px; transition: 0.3s; }
        .mobile-menu {
            display: none; position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
            background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
            flex-direction: column; align-items: center; justify-content: center; gap: 28px;
            z-index: 99; opacity: 0; transition: opacity 0.3s;
        }
        .mobile-menu.open { display: flex; opacity: 1; }
        .mobile-menu a { font-size: 20px; font-weight: 500; color: var(--text); padding: 8px 0; }

        /* Hero */
        .hero {
            min-height: 100vh; display: flex; align-items: center; justify-content: center;
            position: relative; overflow: hidden;
            background: linear-gradient(135deg, #2A5A3A 0%, #4A7C59 50%, #3A6A49 100%);
            margin-top: 0;
        }
        .hero-bg {
            position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; opacity: 0.2;
            animation: heroParallax 20s ease infinite alternate;
        }
        @keyframes heroParallax {
            0% { transform: scale(1) translate(0, 0); }
            100% { transform: scale(1.05) translate(-10px, -10px); }
        }
        .hero-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.15); }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; padding: 0 20px; animation: fadeInUp 1s ease; }
        @keyframes fadeInUp {
            0% { opacity: 0; transform: translateY(40px); }
            100% { opacity: 1; transform: translateY(0); }
        }
        .hero h1 { font-size: 42px; font-weight: 700; line-height: 1.2; color: #fff; margin-bottom: 20px; letter-spacing: 1px; }
        .hero p { font-size: 20px; color: rgba(255,255,255,0.85); max-width: 700px; margin: 0 auto 36px; line-height: 1.8; }
        .hero-cta { display: inline-flex; align-items: center; gap: 8px; padding: 16px 40px; background: var(--accent); color: #fff; font-size: 18px; font-weight: 600; border-radius: var(--radius-cta); border: none; cursor: pointer; transition: all 0.3s; box-shadow: 0 8px 24px rgba(212,163,115,0.3); }
        .hero-cta:hover { background: #C4956A; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(212,163,115,0.4); }
        .scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2; color: rgba(255,255,255,0.6); font-size: 14px; display: flex; flex-direction: column; align-items: center; gap: 6px; animation: bounce 2s infinite; }
        @keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(10px)} }

        /* Section common */
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { font-size: 32px; font-weight: 600; color: var(--text); margin-bottom: 12px; letter-spacing: 0.5px; }
        .section-title p { font-size: 17px; color: var(--subtext); max-width: 600px; margin: 0 auto; }

        /* Features */
        .features-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
        @media (min-width: 768px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }
        .feature-card {
            background: #fff; border-radius: var(--radius-card); padding: 32px 28px;
            box-shadow: var(--shadow-card); transition: all 0.3s; border: 1px solid rgba(0,0,0,0.04);
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .feature-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 18px; background: rgba(74,124,89,0.1); color: var(--primary); }
        .feature-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; color: var(--text); }
        .feature-card p { font-size: 15px; color: var(--subtext); line-height: 1.8; }

        /* Evidence / Stats */
        .stats-section { background: var(--primary); color: #fff; }
        .stats-grid { display: grid; grid-template-columns: 1fr; gap: 32px; text-align: center; }
        @media (min-width: 640px) { .stats-grid { grid-template-columns: repeat(3, 1fr); } }
        .stat-item {}
        .stat-number { font-size: 48px; font-weight: 700; line-height: 1.1; margin-bottom: 6px; letter-spacing: 1px; }
        .stat-label { font-size: 16px; color: rgba(255,255,255,0.8); }

        /* Pricing */
        .pricing-grid { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: start; }
        @media (min-width: 768px) { .pricing-grid { grid-template-columns: repeat(3, 1fr); } }
        .pricing-card {
            background: #fff; border-radius: var(--radius-card); padding: 36px 28px;
            box-shadow: var(--shadow-card); border: 1px solid rgba(0,0,0,0.04);
            transition: all 0.3s; position: relative; text-align: center;
        }
        .pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .pricing-card.featured {
            border: 2px solid var(--primary); transform: scale(1.02);
        }
        .pricing-card.featured:hover { transform: scale(1.02) translateY(-4px); }
        .pricing-badge {
            position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
            background: var(--accent); color: #fff; padding: 4px 18px; border-radius: 20px;
            font-size: 13px; font-weight: 600;
        }
        .pricing-card h3 { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
        .pricing-price { font-size: 36px; font-weight: 700; color: var(--primary); margin: 16px 0; }
        .pricing-price span { font-size: 16px; font-weight: 400; color: var(--subtext); }
        .pricing-features { list-style: none; padding: 0; margin: 20px 0 28px; text-align: left; }
        .pricing-features li { padding: 8px 0; font-size: 15px; color: var(--subtext); display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--border); }
        .pricing-features li:last-child { border-bottom: none; }
        .pricing-features li::before { content: '✓'; color: var(--primary); font-weight: 700; }
        .pricing-btn {
            display: inline-block; padding: 12px 36px; border-radius: var(--radius-cta);
            font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.3s;
            background: var(--primary); color: #fff; border: none; width: 100%;
        }
        .pricing-btn:hover { background: var(--secondary); transform: translateY(-2px); }
        .pricing-btn.outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .pricing-btn.outline:hover { background: rgba(74,124,89,0.08); }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: #fff; border-radius: 12px; margin-bottom: 12px; overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04); border: 1px solid var(--border);
        }
        .faq-question {
            padding: 18px 24px; font-size: 17px; font-weight: 600; cursor: pointer;
            display: flex; justify-content: space-between; align-items: center;
            transition: background 0.3s; color: var(--text);
        }
        .faq-question:hover { background: rgba(74,124,89,0.04); }
        .faq-icon { font-size: 22px; transition: transform 0.3s; color: var(--primary); }
        .faq-item.open .faq-icon { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px; font-size: 15px; color: var(--subtext); line-height: 1.8;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* News / CMS */
        .news-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
        @media (min-width: 640px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .news-grid { grid-template-columns: repeat(3, 1fr); } }
        .news-card {
            background: #fff; border-radius: var(--radius-card); overflow: hidden;
            box-shadow: var(--shadow-card); transition: all 0.3s; border: 1px solid rgba(0,0,0,0.04);
            display: flex; flex-direction: column;
        }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .news-thumb { width: 100%; aspect-ratio: 3/2; object-fit: cover; background: #eee; }
        .news-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .news-tag { display: inline-block; padding: 2px 12px; background: var(--primary); color: #fff; border-radius: 12px; font-size: 12px; font-weight: 500; margin-bottom: 10px; width: fit-content; }
        .news-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
        .news-body h3 a { color: var(--text); }
        .news-body h3 a:hover { color: var(--primary); }
        .news-excerpt { font-size: 14px; color: var(--subtext); line-height: 1.7; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 13px; color: #999; }
        .cms-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--subtext); font-size: 16px; background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow-card); }

        /* CTA */
        .cta-section { background: linear-gradient(135deg, #2A5A3A, #4A7C59); color: #fff; text-align: center; padding: 80px 0; }
        .cta-section h2 { font-size: 36px; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { font-size: 18px; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 32px; }
        .cta-btn { display: inline-flex; align-items: center; gap: 8px; padding: 16px 44px; background: var(--accent); color: #fff; font-size: 18px; font-weight: 600; border-radius: var(--radius-cta); border: none; cursor: pointer; transition: all 0.3s; box-shadow: 0 8px 24px rgba(212,163,115,0.3); }
        .cta-btn:hover { background: #C4956A; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(212,163,115,0.4); }

        /* Footer */
        .site-footer { background: #1E1E1E; color: rgba(255,255,255,0.7); padding: 60px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; }
        @media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }
        .footer-col h4 { color: #fff; font-size: 17px; font-weight: 600; margin-bottom: 16px; }
        .footer-col p, .footer-col a { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 2; }
        .footer-col a:hover { color: var(--accent); }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; margin-top: 40px; text-align: center; font-size: 14px; color: rgba(255,255,255,0.4); }

        /* Floating CTA */
        .floating-cta {
            position: fixed; bottom: 28px; right: 28px; z-index: 50;
            width: 56px; height: 56px; border-radius: 50%;
            background: var(--accent); color: #fff; border: none; cursor: pointer;
            display: flex; align-items: center; justify-content: center;
            font-size: 24px; box-shadow: 0 8px 24px rgba(212,163,115,0.4);
            transition: all 0.3s;
        }
        .floating-cta:hover { transform: scale(1.08); box-shadow: 0 12px 32px rgba(212,163,115,0.5); }
        .floating-cta .tooltip {
            position: absolute; right: 64px; top: 50%; transform: translateY(-50%);
            background: var(--text); color: #fff; padding: 6px 14px; border-radius: 8px;
            font-size: 13px; white-space: nowrap; opacity: 0; pointer-events: none;
            transition: opacity 0.3s;
        }
        .floating-cta:hover .tooltip { opacity: 1; }

        @media (max-width: 640px) {
            .floating-cta { width: 44px; height: 44px; font-size: 18px; bottom: 20px; right: 20px; }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 16px; }
            .section { padding: 48px 0; }
            .section-title h2 { font-size: 26px; }
            .stat-number { font-size: 36px; }
            .pricing-card.featured { transform: none; }
            .nav-links { display: none; }
            .hamburger { display: flex; }
            .pricing-grid { gap: 16px; }
            .news-grid { gap: 16px; }
        }
        @media (min-width: 641px) and (max-width: 1024px) {
            .hero h1 { font-size: 36px; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* Utility */
        .text-primary { color: var(--primary); }
        .bg-primary { background: var(--primary); }
        .border-primary { border-color: var(--primary); }

        /* Focus / Accessibility */
        a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #4A7C59;
            --primary-hover: #3A6A49;
            --primary-light: rgba(74, 124, 89, 0.08);
            --secondary: #2A5A3A;
            --accent: #D4A373;
            --accent-hover: #C49363;
            --bg: #F9F8F6;
            --bg-warm: #F2F0EB;
            --text: #1E1E1E;
            --text-secondary: #5A5A5A;
            --text-muted: #777777;
            --border: #E5E3DF;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        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: 600;
            color: var(--text);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            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%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo span {
            color: var(--text);
            font-weight: 400;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            transition: color var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text);
            font-size: 24px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--primary-light);
        }
        .hamburger:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Mobile Nav Overlay */
        .mobile-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-height));
            background: rgba(0, 0, 0, 0.35);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .mobile-overlay.open {
            opacity: 1;
        }
        .mobile-menu {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
            background: #fff;
            padding: 24px 16px 32px;
            box-shadow: var(--shadow-lg);
            z-index: 1000;
            transform: translateY(-12px);
            opacity: 0;
            pointer-events: none;
            transition: transform 300ms ease, opacity 300ms ease;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-links {
            flex-direction: column;
            align-items: flex-start;
            gap: 4px;
        }
        .mobile-menu .nav-links a {
            display: block;
            width: 100%;
            padding: 14px 12px;
            font-size: 17px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu .nav-links a:hover {
            background: var(--primary-light);
        }
        .mobile-menu .nav-links a.active {
            background: var(--primary-light);
            color: var(--primary);
        }

        @media (max-width: 767px) {
            .nav-links.desktop {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
            .mobile-menu {
                display: block;
            }
        }
        @media (min-width: 768px) {
            .mobile-overlay,
            .mobile-menu {
                display: none !important;
            }
            .nav-links.desktop {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: var(--header-height);
            padding-bottom: 60px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 30, 30, 0.70) 0%, rgba(74, 124, 89, 0.55) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 0 16px;
            animation: heroFadeIn 1s ease forwards;
        }
        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(24px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .hero-content h1 {
            font-size: 40px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .hero-content .hero-sub {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.88);
            line-height: 1.6;
            margin-bottom: 32px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-actions .btn-primary {
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-lg);
            background: var(--accent);
            color: #fff;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(212, 163, 115, 0.35);
        }
        .hero-actions .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 163, 115, 0.45);
        }
        .hero-actions .btn-secondary {
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-lg);
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.60);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .hero-scroll {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: rgba(255, 255, 255, 0.70);
            font-size: 13px;
            animation: scrollBounce 2s infinite;
        }
        .hero-scroll .arrow-down {
            width: 20px;
            height: 20px;
            border-right: 2px solid rgba(255, 255, 255, 0.70);
            border-bottom: 2px solid rgba(255, 255, 255, 0.70);
            transform: rotate(45deg);
        }
        @keyframes scrollBounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(6px);
            }
        }
        @media (max-width: 639px) {
            .hero-section {
                min-height: 420px;
                padding-bottom: 40px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-content .hero-sub {
                font-size: 16px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                padding: 12px 28px;
                font-size: 14px;
            }
        }
        @media (min-width: 640px) and (max-width: 1023px) {
            .hero-content h1 {
                font-size: 36px;
            }
        }

        /* ===== Section Common ===== */
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 100px;
                padding-bottom: 100px;
            }
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-title .title-accent {
            display: inline-block;
            width: 40px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            margin-top: 12px;
        }
        @media (max-width: 639px) {
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .section-title p {
                font-size: 15px;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* ===== Intro Block (图文左右) ===== */
        .intro-block {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .intro-block .intro-text {
            flex: 1 1 380px;
        }
        .intro-block .intro-text h3 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .intro-block .intro-text p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .intro-block .intro-image {
            flex: 1 1 380px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .intro-block .intro-image:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .intro-block .intro-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 767px) {
            .intro-block {
                gap: 24px;
                flex-direction: column;
            }
            .intro-block .intro-text h3 {
                font-size: 22px;
            }
            .intro-block .intro-image img {
                height: 200px;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 640px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .card-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 28px 24px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }
        .card-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .card-item .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--primary);
        }
        .card-item h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text);
        }
        .card-item p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
        }
        .card-item .card-tag {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
        }

        /* ===== Stats / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (min-width: 640px) {
            .stats-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        @media (max-width: 639px) {
            .stat-item .stat-number {
                font-size: 28px;
            }
            .stat-item {
                padding: 20px 12px;
            }
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            counter-reset: step;
        }
        @media (min-width: 640px) {
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            position: relative;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .process-step .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 0;
            transition: background var(--transition);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 4px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 300;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 350ms ease, padding 350ms ease;
            padding: 0 4px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 4px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        @media (max-width: 639px) {
            .faq-question {
                font-size: 15px;
                padding: 16px 2px;
            }
            .faq-answer p {
                font-size: 14px;
            }
        }

        /* ===== CTA Block ===== */
        .cta-block {
            background: var(--primary);
            border-radius: var(--radius-md);
            padding: 48px 32px;
            text-align: center;
            color: #fff;
            box-shadow: 0 8px 32px rgba(74, 124, 89, 0.30);
        }
        .cta-block h3 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.88);
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .cta-block .btn-cta {
            display: inline-block;
            padding: 16px 48px;
            font-size: 17px;
            font-weight: 600;
            border-radius: var(--radius-lg);
            background: var(--accent);
            color: #fff;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(212, 163, 115, 0.40);
        }
        .cta-block .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 163, 115, 0.50);
            color: #fff;
        }
        @media (max-width: 639px) {
            .cta-block {
                padding: 32px 20px;
            }
            .cta-block h3 {
                font-size: 22px;
            }
            .cta-block .btn-cta {
                padding: 14px 32px;
                font-size: 15px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1E1E1E;
            color: rgba(255, 255, 255, 0.78);
            padding-top: 60px;
            padding-bottom: 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1.2fr;
                gap: 48px;
            }
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 6px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.50);
        }

        /* ===== Floating CTA ===== */
        .floating-cta {
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: 0 6px 24px rgba(212, 163, 115, 0.40);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
        }
        .floating-cta:hover {
            background: var(--accent-hover);
            transform: scale(1.06);
            box-shadow: 0 10px 36px rgba(212, 163, 115, 0.50);
        }
        .floating-cta .tooltip {
            position: absolute;
            right: 66px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--text);
            color: #fff;
            padding: 6px 16px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition);
        }
        .floating-cta:hover .tooltip {
            opacity: 1;
        }
        @media (max-width: 639px) {
            .floating-cta {
                width: 44px;
                height: 44px;
                font-size: 20px;
                bottom: 16px;
                right: 16px;
            }
            .floating-cta .tooltip {
                display: none;
            }
        }

        /* ===== Utility ===== */
        .bg-warm {
            background-color: var(--bg-warm);
        }
        .bg-white {
            background-color: #fff;
        }
        .text-center {
            text-align: center;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .gap-6 {
            gap: 24px;
        }

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

        /* ===== Smooth anchor offset ===== */
        .anchor-offset {
            scroll-margin-top: calc(var(--header-height) + 16px);
        }

/* roulang page: article */
:root {
            --primary: #4A7C59;
            --secondary: #2A5A3A;
            --bg: #F9F8F6;
            --bg-alt: #F2F0EB;
            --text: #1E1E1E;
            --muted: #5A5A5A;
            --accent: #D4A373;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        /* Reset & Base */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            height: 72px;
            transition: all 0.3s ease;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 22px;
            color: var(--text);
            letter-spacing: -0.5px;
        }
        .logo:hover { color: var(--text); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 18px;
        }
        .logo-text { color: var(--text); }
        .logo-text span { color: var(--primary); }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            padding: 6px 0;
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
            border-radius: 2px;
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after { width: 100%; }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        /* Hero Banner (article page top) */
        .article-banner {
            padding: 120px 0 48px;
            background: linear-gradient(135deg, #f5f7f0 0%, #e8ede4 100%);
            position: relative;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: #bbb; font-size: 12px; }
        .breadcrumb .current { color: var(--primary); font-weight: 500; }

        /* Article Title */
        .article-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--muted);
            flex-wrap: wrap;
        }
        .article-meta .category-tag {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
        }
        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Article Content */
        .article-content-wrap {
            padding: 48px 0 64px;
        }
        .article-content {
            max-width: 768px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.9;
            color: #2a2a2a;
        }
        .article-content p {
            margin-bottom: 1.6em;
        }
        .article-content h2 {
            font-size: 26px;
            font-weight: 600;
            margin: 2em 0 0.8em;
            padding-left: 18px;
            border-left: 4px solid var(--primary);
            line-height: 1.3;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 1.8em 0 0.6em;
            color: var(--text);
        }
        .article-content blockquote {
            background: var(--bg-alt);
            border-left: 4px solid var(--primary);
            padding: 20px 24px;
            margin: 1.8em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: #444;
        }
        .article-content ul, .article-content ol {
            margin: 1.2em 0;
            padding-left: 24px;
        }
        .article-content li { margin-bottom: 0.5em; }
        .article-content ul li { list-style: disc; }
        .article-content ol li { list-style: decimal; }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 2em auto;
            box-shadow: var(--shadow);
        }
        .article-content figcaption {
            text-align: center;
            font-size: 14px;
            color: var(--muted);
            margin-top: -1em;
            margin-bottom: 2em;
        }
        .article-content pre {
            background: #1e1e1e;
            color: #e8e8e8;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 15px;
            margin: 1.8em 0;
        }
        .article-content code {
            font-family: 'Menlo', 'Consolas', monospace;
            font-size: 14px;
        }
        .article-content a { text-decoration: underline; text-underline-offset: 3px; }

        /* Not Found */
        .article-not-found {
            max-width: 768px;
            margin: 0 auto;
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found .icon {
            font-size: 64px;
            margin-bottom: 24px;
            opacity: 0.5;
        }
        .article-not-found h2 {
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--muted);
            margin-bottom: 24px;
        }

        /* Related Articles */
        .related-articles {
            background: var(--bg-alt);
            padding: 64px 0;
        }
        .related-articles .section-title {
            font-size: 28px;
            font-weight: 600;
            text-align: center;
            margin-bottom: 40px;
            color: var(--text);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.35s ease;
            cursor: pointer;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 18px 20px 22px;
        }
        .related-card .card-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Back Button */
        .back-section {
            text-align: center;
            padding: 48px 0 64px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 10px 28px;
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            background: transparent;
        }
        .btn-back:hover {
            background: var(--primary);
            color: #fff;
            transform: translateX(-4px);
        }

        /* Footer */
        .site-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            color: #aaa;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #aaa;
            transition: color 0.3s ease;
        }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 14px;
            color: #777;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                gap: 0;
                padding: 16px 20px 24px;
                box-shadow: 0 12px 40px rgba(0,0,0,0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s ease;
                border-bottom: 2px solid var(--bg-alt);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 14px 0;
                font-size: 17px;
                border-bottom: 1px solid rgba(0,0,0,0.04);
                width: 100%;
            }
            .nav-links a:last-child { border-bottom: none; }
            .hamburger { display: flex; }
            .article-title {
                font-size: 26px;
            }
            .article-content {
                font-size: 16px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-banner {
                padding: 100px 0 32px;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 22px;
            }
            .article-content h2 {
                font-size: 20px;
                padding-left: 14px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .container {
                padding: 0 16px;
            }
            .related-card .card-img {
                height: 160px;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: #ccc; border-radius: 8px; }
        ::-webkit-scrollbar-thumb:hover { background: #aaa; }

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

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