/* roulang page: index */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #3B82F6;
  --secondary: #F59E0B;
  --secondary-dark: #D97706;
  --accent: #10B981;
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-soft: #F1F5F9;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.10);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*,*::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:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px;color:var(--text)}
.section-desc{text-align:center;color:var(--text-secondary);max-width:640px;margin:0 auto 48px;font-size:1.05rem;line-height:1.7}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:0.95rem;border:none;cursor:pointer;transition:var(--transition);text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,0.35);color:#fff}
.btn-secondary{background:var(--secondary);color:#fff}
.btn-secondary:hover{background:var(--secondary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,158,11,0.35);color:#fff}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:var(--bg-soft);transform:translateY(-2px)}
.badge{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:500;background:var(--bg-soft);color:var(--text-secondary)}
.badge-primary{background:rgba(37,99,235,0.1);color:var(--primary)}
.badge-secondary{background:rgba(245,158,11,0.1);color:var(--secondary)}
.badge-accent{background:rgba(16,185,129,0.1);color:var(--accent)}
.text-center{text-align:center}
.mt-2{margin-top:8px}
.mt-4{margin-top:16px}
.mt-6{margin-top:24px}
.mt-8{margin-top:32px}
.mt-10{margin-top:40px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media(max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.section{padding:48px 0}.section-title{font-size:1.6rem}}
/* Header */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{font-size:1.35rem;font-weight:800;color:var(--primary);letter-spacing:-0.5px;display:flex;align-items:center;gap:6px}
.logo span{color:var(--secondary)}
.nav{display:flex;align-items:center;gap:8px}
.nav a{padding:8px 18px;border-radius:50px;font-size:0.9rem;font-weight:500;color:var(--text-secondary);transition:var(--transition)}
.nav a:hover{color:var(--primary);background:rgba(37,99,235,0.06)}
.nav a.active{color:#fff;background:var(--primary)}
.nav a.active:hover{color:#fff;background:var(--primary-dark)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.mobile-toggle span{display:block;width:26px;height:2.5px;background:var(--text);border-radius:2px;transition:var(--transition)}
@media(max-width:768px){
  .mobile-toggle{display:flex}
  .nav{position:fixed;top:72px;left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);flex-direction:column;padding:16px 24px;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition);gap:4px}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav a{width:100%;padding:12px 16px;font-size:1rem}
}
/* Hero */
.hero{position:relative;min-height:85vh;display:flex;align-items:center;background:linear-gradient(135deg,#1E3A5F 0%,#2563EB 50%,#1D4ED8 100%);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.15;mix-blend-mode:overlay}
.hero .container{position:relative;z-index:2;text-align:center;padding:80px 24px}
.hero-badge{display:inline-block;padding:6px 20px;border-radius:50px;background:rgba(255,255,255,0.12);color:rgba(255,255,255,0.9);font-size:0.85rem;font-weight:500;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero h1{font-size:3.2rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:20px;letter-spacing:-1px}
.hero h1 span{color:var(--secondary)}
.hero p{font-size:1.15rem;color:rgba(255,255,255,0.8);max-width:600px;margin:0 auto 36px;line-height:1.7}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
@media(max-width:768px){
  .hero{min-height:70vh}
  .hero h1{font-size:2rem}
  .hero p{font-size:1rem}
  .hero-actions{flex-direction:column;align-items:center}
}
/* Features */
.features{background:var(--bg)}
.feature-card{background:var(--bg-card);border-radius:var(--radius);padding:36px 28px;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--border);text-align:center}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feature-icon{width:60px;height:60px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:1.6rem;color:#fff}
.feature-icon.blue{background:linear-gradient(135deg,#3B82F6,#2563EB)}
.feature-icon.amber{background:linear-gradient(135deg,#FBBF24,#F59E0B)}
.feature-icon.green{background:linear-gradient(135deg,#34D399,#10B981)}
.feature-icon.purple{background:linear-gradient(135deg,#A78BFA,#7C3AED)}
.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px;color:var(--text)}
.feature-card p{font-size:0.93rem;color:var(--text-secondary);line-height:1.7}
/* Categories */
.categories{background:var(--bg-card)}
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);background:var(--bg-card);border:1px solid var(--border)}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.cat-card img{width:100%;height:200px;object-fit:cover}
.cat-card-body{padding:20px 24px 24px}
.cat-card-body h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.cat-card-body p{font-size:0.9rem;color:var(--text-secondary);margin-bottom:12px}
.cat-card-body .btn{font-size:0.85rem;padding:8px 20px}
/* Latest News */
.latest-news{background:var(--bg-soft)}
.news-card{display:flex;background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--border);margin-bottom:20px}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.news-card img{width:280px;min-height:180px;object-fit:cover;flex-shrink:0}
.news-card-body{padding:24px 28px;flex:1;display:flex;flex-direction:column;justify-content:center}
.news-card-body .badge{margin-bottom:10px;width:fit-content}
.news-card-body h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:var(--text)}
.news-card-body p{font-size:0.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:12px}
.news-meta{font-size:0.8rem;color:var(--text-light);display:flex;gap:16px;align-items:center}
@media(max-width:768px){
  .news-card{flex-direction:column}
  .news-card img{width:100%;height:200px}
}
/* Stats */
.stats{background:linear-gradient(135deg,#1E3A5F,#2563EB);position:relative;overflow:hidden}
.stats::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.08;mix-blend-mode:overlay}
.stats .container{position:relative;z-index:2}
.stats .section-title{color:#fff}
.stats .section-desc{color:rgba(255,255,255,0.7)}
.stat-item{text-align:center;padding:24px}
.stat-number{font-size:2.8rem;font-weight:800;color:var(--secondary);line-height:1.2}
.stat-label{font-size:0.95rem;color:rgba(255,255,255,0.8);margin-top:6px}
/* Process */
.process{background:var(--bg-card)}
.process-step{display:flex;gap:20px;align-items:flex-start;padding:24px 0;border-bottom:1px solid var(--border)}
.process-step:last-child{border-bottom:none}
.step-num{width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;flex-shrink:0}
.step-content h4{font-size:1.05rem;font-weight:700;margin-bottom:4px}
.step-content p{font-size:0.9rem;color:var(--text-secondary)}
/* FAQ */
.faq{background:var(--bg-soft)}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0;cursor:pointer}
.faq-item:last-child{border-bottom:none}
.faq-question{display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.02rem;color:var(--text);gap:16px}
.faq-question .icon{font-size:1.3rem;transition:var(--transition);flex-shrink:0}
.faq-item.open .faq-question .icon{transform:rotate(45deg)}
.faq-answer{padding-top:12px;color:var(--text-secondary);font-size:0.93rem;line-height:1.7;display:none}
.faq-item.open .faq-answer{display:block}
/* CTA */
.cta-section{background:linear-gradient(135deg,#2563EB,#1D4ED8);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:0.08;mix-blend-mode:overlay}
.cta-section .container{position:relative;z-index:2;text-align:center;padding:80px 24px}
.cta-section h2{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:16px}
.cta-section p{color:rgba(255,255,255,0.8);max-width:560px;margin:0 auto 32px;font-size:1.05rem}
.cta-section .btn-white{font-size:1rem;padding:14px 36px}
/* Footer */
.footer{background:var(--text);color:rgba(255,255,255,0.7);padding:48px 0 24px}
.footer .container{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:12px;font-size:1.2rem}
.footer-brand .logo span{color:var(--secondary)}
.footer-brand p{font-size:0.88rem;line-height:1.7;max-width:320px}
.footer h4{color:#fff;font-size:0.95rem;font-weight:600;margin-bottom:16px}
.footer a{display:block;color:rgba(255,255,255,0.6);font-size:0.88rem;padding:4px 0;transition:var(--transition)}
.footer a:hover{color:var(--secondary)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);margin-top:40px;padding-top:20px;text-align:center;font-size:0.82rem;color:rgba(255,255,255,0.4)}
@media(max-width:768px){
  .footer .container{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:520px){
  .footer .container{grid-template-columns:1fr}
}
/* Empty state */
.empty-state{text-align:center;padding:40px 20px;color:var(--text-light);font-size:0.95rem;background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border)}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-light: #f8c291;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --text-dark: #1a1a2e;
            --text-body: #2d3436;
            --text-light: #636e72;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: var(--text-dark);
            font-weight: 700;
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
            margin-bottom: 0.5rem;
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-body);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title .sub {
            display: inline-block;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
            padding: 4px 16px;
            border-radius: 50px;
            letter-spacing: 1px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .section-title h2 {
            margin-bottom: 0.75rem;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--bg-light);
            color: var(--text-light);
        }
        .badge-hot {
            background: rgba(230, 57, 70, 0.12);
            color: var(--primary);
        }
        .badge-new {
            background: rgba(69, 123, 157, 0.12);
            color: var(--secondary-light);
        }
        .badge-live {
            background: rgba(244, 162, 97, 0.15);
            color: #c77a1a;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            background: var(--primary);
            color: var(--text-white);
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.30);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-secondary {
            background: var(--secondary);
            color: var(--text-white);
        }
        .btn-secondary:hover {
            background: #15263b;
            box-shadow: 0 8px 24px rgba(29, 53, 87, 0.30);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--primary);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover {
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
        }
        .nav a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.25);
        }
        .nav a.active:hover {
            background: var(--primary-dark);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 60%, #0f3460 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: clamp(2rem, 5vw, 3rem);
            margin-bottom: 0.75rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 680px;
            margin: 0 auto 1.5rem;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .page-banner .breadcrumb span {
            color: var(--text-white);
        }

        /* ===== Category Filter Tabs ===== */
        .filter-tabs {
            padding: 32px 0 16px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: var(--header-h);
            z-index: 100;
        }
        .filter-tabs .tabs-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .filter-tabs .tab-btn {
            padding: 8px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-body);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .filter-tabs .tab-btn:hover {
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .filter-tabs .tab-btn.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.25);
        }

        /* ===== Event Cards Grid ===== */
        .section-events {
            padding: 60px 0;
            background: var(--bg-light);
        }
        .event-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 28px;
        }
        .event-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .event-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .event-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
            background: var(--secondary);
        }
        .event-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .event-card:hover .card-img img {
            transform: scale(1.05);
        }
        .event-card .card-img .card-badges {
            position: absolute;
            top: 14px;
            left: 14px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .event-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .event-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .event-card .card-body .meta i {
            color: var(--primary);
            width: 16px;
        }
        .event-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .event-card .card-body h3 a {
            color: var(--text-dark);
        }
        .event-card .card-body h3 a:hover {
            color: var(--primary);
        }
        .event-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 1rem;
            flex: 1;
        }
        .event-card .card-body .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .event-card .card-body .card-footer .tag {
            font-size: 0.78rem;
            color: var(--text-light);
            background: var(--bg-light);
            padding: 4px 12px;
            border-radius: 50px;
        }
        .event-card .card-body .card-footer .btn-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
        }
        .event-card .card-body .card-footer .btn-link i {
            transition: transform 0.2s;
        }
        .event-card .card-body .card-footer .btn-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Featured / Highlight Section ===== */
        .section-featured {
            padding: 60px 0;
            background: var(--bg-white);
        }
        .featured-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .featured-wrap .featured-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            height: 360px;
            background: var(--secondary-light);
        }
        .featured-wrap .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .featured-wrap .featured-content h2 {
            margin-bottom: 0.75rem;
        }
        .featured-wrap .featured-content .featured-list {
            margin-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .featured-wrap .featured-content .featured-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 0.95rem;
        }
        .featured-wrap .featured-content .featured-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 2px;
            min-width: 20px;
        }

        /* ===== Stats Counter ===== */
        .section-stats {
            padding: 60px 0;
            background: var(--secondary);
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .section-stats::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .section-stats .container {
            position: relative;
            z-index: 2;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stats-grid .stat-item .num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.1;
            margin-bottom: 4px;
        }
        .stats-grid .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 400;
        }
        .stats-grid .stat-item .num i {
            font-size: 0.5em;
            vertical-align: super;
            color: var(--accent);
        }

        /* ===== Schedule / Timeline ===== */
        .section-schedule {
            padding: 60px 0;
            background: var(--bg-light);
        }
        .schedule-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }
        .schedule-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-white);
            padding: 18px 24px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .schedule-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(6px);
        }
        .schedule-item .time {
            font-weight: 700;
            color: var(--primary);
            min-width: 80px;
            font-size: 1rem;
        }
        .schedule-item .info {
            flex: 1;
        }
        .schedule-item .info .title {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 2px;
        }
        .schedule-item .info .desc {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .schedule-item .status {
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(69, 123, 157, 0.12);
            color: var(--secondary-light);
        }
        .schedule-item .status.live {
            background: rgba(244, 162, 97, 0.15);
            color: #c77a1a;
        }
        .schedule-item .status.done {
            background: rgba(230, 57, 70, 0.08);
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: 60px 0;
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg-white);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
        }
        .faq-item .faq-q i {
            transition: transform 0.3s;
            color: var(--primary);
            font-size: 1.1rem;
        }
        .faq-item.active .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-a {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .section-cta {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #c1121f 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .section-cta .container {
            position: relative;
            z-index: 2;
        }
        .section-cta h2 {
            color: var(--text-white);
            margin-bottom: 0.75rem;
        }
        .section-cta p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }
        .section-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section-cta .btn {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
        }
        .section-cta .btn:hover {
            background: var(--bg-light);
            color: var(--primary-dark);
            border-color: var(--bg-light);
        }
        .section-cta .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.6);
            color: var(--text-white);
        }
        .section-cta .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-white);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
        }
        .footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer .container:last-child {
            display: block;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .logo {
            color: var(--text-white);
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            max-width: 360px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.82rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .featured-wrap {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .featured-wrap .featured-img {
                height: 260px;
            }
            .footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                box-shadow: var(--shadow-md);
                border-bottom: 2px solid var(--border-light);
                gap: 6px;
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
            }
            .hamburger {
                display: flex;
            }
            .page-banner {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .event-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-grid .stat-item .num {
                font-size: 2rem;
            }
            .schedule-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 18px;
            }
            .schedule-item .time {
                min-width: 60px;
                font-size: 0.9rem;
            }
            .footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer p {
                max-width: 100%;
            }
            .filter-tabs .tabs-wrap {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 8px;
                justify-content: flex-start;
                -webkit-overflow-scrolling: touch;
            }
            .filter-tabs .tab-btn {
                white-space: nowrap;
                flex-shrink: 0;
            }
            .section-cta .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .event-card .card-img {
                height: 170px;
            }
            .event-card .card-body {
                padding: 16px 18px 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid .stat-item .num {
                font-size: 1.6rem;
            }
            .featured-wrap .featured-img {
                height: 200px;
            }
            .schedule-item .time {
                min-width: 50px;
                font-size: 0.82rem;
            }
            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-a {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.active .faq-a {
                padding: 0 16px 16px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --secondary-light: #fef3c7;
            --accent: #8b5cf6;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-2: #1e293b;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 12px 32px rgba(37,99,235,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-w: 1200px;
            --max-w-read: 740px;
            --nav-h: 72px;
            --gap: 64px;
            --gap-sm: 32px;
        }

        /* ===== 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: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }

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

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo span {
            color: var(--primary);
        }
        .logo em {
            font-style: normal;
            color: var(--secondary);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }
        .nav a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-xs);
            cursor: pointer;
            color: var(--text);
            font-size: 22px;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--border-light);
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: calc(var(--nav-h) + 60px) 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.72) 50%, rgba(15,23,42,0.60) 100%);
            z-index: 1;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero .category-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: var(--secondary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
            box-shadow: 0 4px 12px rgba(245,158,11,0.3);
        }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            text-shadow: 0 2px 16px rgba(0,0,0,0.2);
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            color: rgba(255,255,255,0.75);
            font-size: 14px;
            flex-wrap: wrap;
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            font-size: 15px;
            opacity: 0.7;
        }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: 48px 0 56px;
            background: var(--bg);
        }
        .article-body .container-narrow {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px 48px 40px;
        }
        .article-body .content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 20px;
        }
        .article-body .content h2,
        .article-body .content h3,
        .article-body .content h4 {
            margin-top: 32px;
            margin-bottom: 14px;
            font-weight: 700;
            color: var(--text);
        }
        .article-body .content h2 {
            font-size: 26px;
        }
        .article-body .content h3 {
            font-size: 21px;
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--primary-light);
            border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            color: var(--text);
            font-style: normal;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin: 16px 0 20px 24px;
        }
        .article-body .content li {
            margin-bottom: 8px;
        }
        .article-body .content ul li {
            list-style: disc;
        }
        .article-body .content ol li {
            list-style: decimal;
        }
        .article-body .content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover {
            color: var(--primary-dark);
        }
        .article-body .content code {
            background: var(--border-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body .content pre {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 15px;
            line-height: 1.6;
        }

        /* ===== 文章未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box .icon {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .not-found-box h2 {
            font-size: 28px;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            font-size: 16px;
            margin-bottom: 28px;
        }
        .not-found-box .btn {
            display: inline-block;
        }

        /* ===== 文章底部 ===== */
        .article-footer-bar {
            padding-top: 32px;
            margin-top: 40px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-bar .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-footer-bar .tags .tag {
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-footer-bar .tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .article-footer-bar .share {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light);
        }
        .article-footer-bar .share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--border-light);
            color: var(--text-light);
            font-size: 16px;
            transition: all var(--transition);
        }
        .article-footer-bar .share a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0 64px;
            background: var(--bg);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 36px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            flex-shrink: 0;
        }
        .related-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body .card-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 12px;
        }
        .related-card .card-body .card-meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: auto;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.78) 100%);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37,99,235,0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37,99,235,0.35);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(245,158,11,0.3);
        }
        .btn-secondary:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px 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(255,255,255,0.12);
            color: #fff;
            border-color: rgba(255,255,255,0.6);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark-2);
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .footer .container {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer .footer-brand .logo {
            color: #fff;
            font-size: 22px;
            margin-bottom: 14px;
        }
        .footer .footer-brand .logo span {
            color: var(--primary-light);
        }
        .footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
            margin-top: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-h: 64px;
                --gap: 40px;
                --gap-sm: 24px;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--nav-h);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                border-radius: var(--radius-xs);
            }
            .menu-toggle {
                display: flex;
            }

            .article-hero {
                min-height: 300px;
                padding: calc(var(--nav-h) + 40px) 0 40px;
            }
            .article-hero h1 {
                font-size: 26px;
            }
            .article-hero .meta {
                gap: 14px;
                font-size: 13px;
                flex-direction: column;
            }

            .article-body .container-narrow {
                padding: 28px 20px 24px;
            }
            .article-body .content {
                font-size: 16px;
            }
            .article-body .content h2 {
                font-size: 22px;
            }
            .article-body .content h3 {
                font-size: 18px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .related-card .card-img {
                height: 150px;
            }

            .cta-section h2 {
                font-size: 26px;
            }

            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }

            .article-hero h1 {
                font-size: 22px;
            }
            .article-hero .meta {
                font-size: 12px;
                gap: 8px;
            }

            .article-body .container-narrow {
                padding: 20px 14px 18px;
                border-radius: var(--radius-sm);
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-card .card-img {
                height: 180px;
            }

            .footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-section .btn-group .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 小工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 回到顶部 */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 20px rgba(37,99,235,0.3);
            cursor: pointer;
            transition: all var(--transition);
            z-index: 999;
            border: none;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(37,99,235,0.4);
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text);
        }
        .breadcrumb .sep {
            color: var(--border);
        }

        /* loading shimmer (for related cards while loading) */
        @keyframes shimmer {
            0% { background-position: -200px 0; }
            100% { background-position: calc(200px + 100%) 0; }
        }