/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0f1b3d;
  --primary-light: #1a2d6e;
  --primary-dark: #0a1228;
  --accent: #e8b830;
  --accent-light: #f0d060;
  --accent-dark: #c99f20;
  --bg: #f4f6fc;
  --bg-alt: #eef1f8;
  --bg-dark: #0b1429;
  --text: #1a1a2e;
  --text-light: #5a6a8a;
  --text-white: #f0f2f8;
  --border: #d0d8e8;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 30px rgba(15, 27, 61, 0.10);
  --shadow-hover: 0 16px 48px rgba(15, 27, 61, 0.18);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --nav-height: 72px;
  --max-width: 1200px;
  --gap: 24px;
}
/* ===== 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); background: var(--bg); color: var(--text); line-height: 1.6; font-size: 16px; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
p { margin-bottom: 1rem; color: var(--text-light); }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gap); }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: #b0c0d8; }
/* ===== Header / Nav ===== */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(208,216,232,0.4);
  height: var(--nav-height); display: flex; align-items: center;
  transition: var(--transition);
}
.header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 10px; }
.logo i { color: var(--accent); font-size: 1.8rem; }
.logo span { background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a { padding: 8px 18px; border-radius: var(--radius-sm); font-weight: 500; color: var(--text); font-size: 0.95rem; }
.nav a:hover { background: rgba(232,184,48,0.12); color: var(--primary); }
.nav a.active { background: var(--accent); color: var(--primary-dark); font-weight: 600; }
.nav-cta { background: var(--primary) !important; color: #fff !important; padding: 10px 24px !important; border-radius: 50px !important; font-weight: 600 !important; }
.nav-cta:hover { background: var(--primary-light) !important; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,27,61,0.25); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--primary); cursor: pointer; padding: 4px; }
/* ===== Hero ===== */
.hero {
  padding-top: calc(var(--nav-height) + 0px);
  min-height: 100vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, rgba(15,27,61,0.92) 0%, rgba(10,18,40,0.88) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff; position: relative; overflow: hidden;
}
.hero::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px; background: linear-gradient(transparent, var(--bg)); pointer-events: none; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; width: 100%; }
.hero-text { position: relative; z-index: 2; }
.hero-text h1 { color: #fff; margin-bottom: 1.2rem; }
.hero-text h1 i { color: var(--accent); margin-right: 8px; }
.hero-text p { font-size: 1.2rem; color: rgba(255,255,255,0.75); max-width: 540px; line-height: 1.8; }
.hero-badge { display: inline-block; background: rgba(232,184,48,0.2); border: 1px solid rgba(232,184,48,0.3); color: var(--accent); padding: 6px 18px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; margin-bottom: 1.5rem; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 34px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--accent); color: var(--primary-dark); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(232,184,48,0.35); }
.btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.3); color: #fff; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(15,27,61,0.3); }
.hero-visual { position: relative; z-index: 2; display: flex; justify-content: center; align-items: center; }
.hero-card { background: rgba(255,255,255,0.06); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg); padding: 32px; width: 100%; max-width: 420px; }
.hero-card-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hero-stat { text-align: center; padding: 16px; background: rgba(255,255,255,0.05); border-radius: var(--radius-sm); }
.hero-stat-number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }
/* ===== Features / Intro ===== */
.intro-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--gap); margin-top: 2rem; }
.intro-card { background: #fff; border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); }
.intro-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
.intro-card-icon { width: 56px; height: 56px; border-radius: 14px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1.6rem; margin-bottom: 1.2rem; }
.intro-card h3 { margin-bottom: 0.6rem; }
.intro-card p { font-size: 0.95rem; margin-bottom: 0; }
/* ===== Category Section ===== */
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--gap); }
.category-card { position: relative; border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); transition: var(--transition); cursor: pointer; }
.category-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
.category-card-img { width: 100%; height: 200px; object-fit: cover; }
.category-card-body { padding: 20px; }
.category-card h3 { font-size: 1.2rem; margin-bottom: 6px; }
.category-card p { font-size: 0.9rem; margin-bottom: 0; }
.category-card .tag { display: inline-block; background: rgba(232,184,48,0.15); color: var(--accent-dark); padding: 2px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; margin-top: 10px; }
/* ===== News / CMS List ===== */
.news-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: var(--gap); }
.news-item { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); }
.news-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-item-img { width: 100%; height: 200px; object-fit: cover; }
.news-item-body { padding: 20px; }
.news-item-meta { display: flex; gap: 12px; align-items: center; font-size: 0.82rem; color: var(--text-light); margin-bottom: 8px; }
.news-item-meta .cat { background: var(--accent); color: var(--primary-dark); padding: 2px 12px; border-radius: 50px; font-weight: 600; font-size: 0.7rem; }
.news-item h3 { font-size: 1.1rem; margin-bottom: 6px; }
.news-item p { font-size: 0.9rem; margin-bottom: 0; }
.news-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-light); font-size: 1.1rem; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
/* ===== Stats / Numbers ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--gap); text-align: center; }
.stat-item { padding: 32px 16px; }
.stat-number { font-size: 2.8rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-label { font-size: 1rem; color: rgba(255,255,255,0.7); margin-top: 8px; }
/* ===== Process Flow ===== */
.process-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--gap); counter-reset: step; }
.process-step { background: #fff; border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); text-align: center; position: relative; border: 1px solid var(--border); }
.process-step::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 12px; right: 16px; font-size: 3rem; font-weight: 900; color: rgba(232,184,48,0.12); line-height: 1; }
.process-step-icon { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--primary-dark); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin: 0 auto 12px; }
.process-step h4 { font-size: 1.1rem; margin-bottom: 6px; }
.process-step p { font-size: 0.9rem; margin-bottom: 0; }
/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border-radius: var(--radius-sm); box-shadow: 0 2px 12px rgba(15,27,61,0.06); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question { padding: 18px 24px; font-weight: 600; font-size: 1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: none; border: none; width: 100%; text-align: left; color: var(--primary); }
.faq-question i { transition: var(--transition); color: var(--accent); }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { margin-bottom: 0; font-size: 0.95rem; }
/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; margin: 0 auto; max-width: 900px; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -50%; right: -30%; width: 400px; height: 400px; background: rgba(232,184,48,0.08); border-radius: 50%; pointer-events: none; }
.cta-section h2 { color: #fff; margin-bottom: 0.8rem; position: relative; }
.cta-section p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 1.8rem; position: relative; }
.cta-section .btn { position: relative; }
/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: var(--text-white); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .logo { color: #fff; }
.footer-brand p { font-size: 0.9rem; color: #7a8aaa; margin-top: 12px; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.footer-col a { display: block; color: #7a8aaa; font-size: 0.9rem; padding: 4px 0; }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; margin-top: 32px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: #5a6a8a; }
/* ===== Mobile ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .hero-text p { margin: 0 auto; }
  .hero-actions { justify-content: center; }
  .hero-card { max-width: 360px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav { display: none; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
  .nav-cta { margin-top: 6px; text-align: center; }
  .nav-toggle { display: block; }
  .hero { min-height: 80vh; }
  .hero-card-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .section { padding: 48px 0; }
  .news-list { grid-template-columns: 1fr; }
  .cta-section { padding: 40px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .hero-stat-number { font-size: 1.6rem; }
  .hero-card { padding: 20px; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .logo { font-size: 1.2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1faee;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #212529;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --border-light: #e9ecef;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 32px rgba(0,0,0,0.15);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --spacer: 80px;
            --spacer-sm: 48px;
            --spacer-xs: 32px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }

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

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: 0 2px 24px rgba(0,0,0,0.08); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: var(--primary-light); }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary) !important;
            color: var(--text-white) !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition) !important;
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: var(--text-white) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(230,57,70,0.3);
        }
        .nav-cta i { font-size: 0.8rem; }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--secondary);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--primary-light); }

        /* ===== Page Hero / Banner ===== */
        .page-hero {
            margin-top: var(--header-h);
            padding: 100px 0 80px;
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .page-hero .container { position: relative; z-index: 2; }
        .page-hero h1 {
            color: var(--text-white);
            font-size: 3rem;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 i { color: var(--accent); margin-right: 12px; }
        .page-hero p {
            color: rgba(255,255,255,0.8);
            font-size: 1.15rem;
            max-width: 640px;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 50px;
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.08);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-light);
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--secondary-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-light); }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacer) 0;
        }
        .section-alt { background: var(--bg-alt); }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 { color: var(--text-white); }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .section-title p {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-title .title-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card:hover .card-img { transform: scale(1.03); }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .card-body p { color: var(--text-light); font-size: 0.95rem; line-height: 1.6; }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 10px;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 12px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .card .card-meta i { margin-right: 4px; }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .badge-primary { background: var(--primary); color: var(--text-white); }
        .badge-secondary { background: var(--secondary); color: var(--text-white); }
        .badge-accent { background: var(--accent); color: var(--text-white); }
        .badge-outline { border: 1.5px solid var(--primary); color: var(--primary); background: transparent; }

        /* ===== List ===== */
        .list-group { display: flex; flex-direction: column; gap: 12px; }
        .list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .list-item:hover {
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(230,57,70,0.08);
        }
        .list-item .num {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .list-item .content { flex: 1; }
        .list-item .content h4 { font-size: 1rem; margin-bottom: 2px; }
        .list-item .content p { font-size: 0.9rem; color: var(--text-light); }
        .list-item .badge { flex-shrink: 0; }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-alt);
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            color: var(--secondary);
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--primary-light); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
            text-align: center;
            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;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(230,57,70,0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-sm { padding: 10px 20px; font-size: 0.9rem; }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .stat-card .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 0;
        }
        .footer .logo { color: var(--text-white); margin-bottom: 16px; }
        .footer .logo span { -webkit-text-fill-color: var(--text-white); }
        .footer p { font-size: 0.95rem; line-height: 1.7; max-width: 360px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            padding: 5px 0;
            font-size: 0.92rem;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-col a i { width: 20px; margin-right: 6px; color: var(--accent); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom i { margin-right: 4px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .page-hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            :root { --spacer: 56px; --spacer-sm: 36px; }
            .nav-toggle { display: block; }
            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow-lg);
                pointer-events: none;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a { width: 100%; padding: 12px 18px; font-size: 1.05rem; }
            .nav a.active::after { display: none; }
            .nav-cta { justify-content: center; margin-top: 8px; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .page-hero { padding: 80px 0 56px; min-height: 280px; }
            .page-hero h1 { font-size: 1.9rem; }
            .page-hero p { font-size: 1rem; }
            .section-title h2 { font-size: 1.7rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card .num { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.7rem; }
            .btn-group { flex-direction: column; align-items: center; }
            .btn { width: 100%; max-width: 320px; justify-content: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.6rem; }
            .section { padding: 40px 0; }
            .section-title { margin-bottom: 32px; }
            .card-body { padding: 18px; }
            .list-item { padding: 12px 16px; flex-wrap: wrap; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 16px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 16px; }
        .mt-2 { margin-top: 32px; }
        .mb-1 { margin-bottom: 16px; }
        .mb-2 { margin-bottom: 32px; }
        .gap-sm { gap: 16px; }

        /* ===== Smooth scroll padding ===== */
        #intro, #guide, #faq, #contact { scroll-margin-top: calc(var(--header-h) + 20px); }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b3d;
            --primary-light: #1a2d6a;
            --primary-dark: #080f24;
            --accent: #e85d2c;
            --accent-hover: #d04e1f;
            --accent-light: #fdf0ea;
            --bg: #f4f6fc;
            --bg-card: #ffffff;
            --bg-dark: #0a1128;
            --text: #1a1a2e;
            --text-light: #4a4a6a;
            --text-white: #f0f2f8;
            --border: #dce0ec;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(15, 27, 61, 0.08);
            --shadow-hover: 0 12px 36px rgba(15, 27, 61, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 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);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-h);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }

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

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed; top: 0; left: 0; width: 100%; height: var(--header-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: var(--transition);
        }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; gap: 16px;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-weight: 500; color: var(--text-light); font-size: 0.95rem;
            transition: var(--transition); position: relative;
        }
        .nav a:hover { color: var(--primary); background: var(--accent-light); }
        .nav a.active { color: var(--primary); background: var(--accent-light); font-weight: 600; }
        .nav a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--accent); border-radius: 4px; }
        .nav .nav-cta {
            background: var(--accent); color: #fff !important; padding: 10px 22px;
            border-radius: var(--radius-sm); font-weight: 600; display: flex; align-items: center; gap: 6px;
            box-shadow: 0 4px 12px rgba(232,93,44,0.3);
        }
        .nav .nav-cta:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(232,93,44,0.4); color: #fff !important; }
        .nav-toggle { display: none; background: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
        .nav-toggle:hover { background: var(--accent-light); }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 60%, #162a5c 100%);
            color: var(--text-white);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 2; width: 100%; }
        .article-banner .breadcrumb {
            display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
            font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb .sep { color: rgba(255,255,255,0.4); }
        .article-banner .breadcrumb .current { color: #fff; font-weight: 500; }
        .article-banner h1 {
            font-size: 2.6rem; color: #fff; max-width: 900px;
            line-height: 1.2; margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-banner .meta {
            display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
            font-size: 0.95rem; color: rgba(255,255,255,0.8);
        }
        .article-banner .meta span { display: flex; align-items: center; gap: 6px; }
        .article-banner .meta i { color: var(--accent); }
        .article-banner .meta .category-tag {
            background: var(--accent); color: #fff; padding: 4px 14px;
            border-radius: 20px; font-size: 0.8rem; font-weight: 600;
        }

        /* ===== 文章正文 ===== */
        .article-main { padding: 50px 0 60px; }
        .article-layout {
            display: grid; grid-template-columns: 1fr 320px; gap: 48px;
            align-items: start;
        }
        .article-body { background: var(--bg-card); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
        .article-body .content {
            font-size: 1.05rem; line-height: 1.85; color: var(--text);
        }
        .article-body .content p { margin-bottom: 1.2em; }
        .article-body .content h2, .article-body .content h3 { margin-top: 1.6em; margin-bottom: 0.6em; }
        .article-body .content ul, .article-body .content ol { margin-bottom: 1.2em; padding-left: 1.6em; }
        .article-body .content li { margin-bottom: 0.4em; list-style: disc; }
        .article-body .content img { border-radius: var(--radius); margin: 1.5em 0; box-shadow: var(--shadow); }
        .article-body .content a { color: var(--accent); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-body .content a:hover { border-bottom-color: var(--accent); }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent); background: var(--accent-light);
            padding: 16px 24px; margin: 1.2em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light); font-style: italic;
        }
        .article-body .content code {
            background: #eef1f8; padding: 2px 10px; border-radius: 4px;
            font-size: 0.9em; color: var(--primary);
        }
        .article-not-found {
            text-align: center; padding: 80px 20px;
        }
        .article-not-found i { font-size: 3rem; color: var(--border); margin-bottom: 20px; }
        .article-not-found p { font-size: 1.3rem; color: var(--text-light); margin-bottom: 24px; }
        .article-not-found .btn { display: inline-flex; align-items: center; gap: 8px; }

        /* ===== 文章信息栏 ===== */
        .article-footer-bar {
            display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
            margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border);
            gap: 16px;
        }
        .article-footer-bar .tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .article-footer-bar .tags .tag {
            background: var(--accent-light); color: var(--accent); padding: 4px 14px;
            border-radius: 20px; font-size: 0.85rem; font-weight: 500;
        }
        .article-footer-bar .share { display: flex; align-items: center; gap: 10px; }
        .article-footer-bar .share span { font-size: 0.9rem; color: var(--text-light); }
        .article-footer-bar .share a {
            width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
            border-radius: 50%; background: var(--bg); color: var(--text-light);
            transition: var(--transition);
        }
        .article-footer-bar .share a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

        /* ===== 侧边栏 ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: 32px; }
        .sidebar-card {
            background: var(--bg-card); border-radius: var(--radius-lg); padding: 28px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 12px;
            border-bottom: 2px solid var(--accent); display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex; gap: 12px; align-items: flex-start; padding: 10px 0;
            border-bottom: 1px solid var(--border); transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { padding-left: 8px; }
        .sidebar-list a .thumb {
            width: 70px; height: 52px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0;
            background: var(--bg);
        }
        .sidebar-list a .info { flex: 1; }
        .sidebar-list a .info .s-title { font-size: 0.9rem; font-weight: 600; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.3; }
        .sidebar-list a .info .s-date { font-size: 0.75rem; color: var(--text-light); margin-top: 4px; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff; border-radius: var(--radius-lg); padding: 32px 28px; text-align: center;
        }
        .sidebar-cta h4 { color: #fff; font-size: 1.2rem; margin-bottom: 8px; }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.95rem; margin-bottom: 20px; }
        .sidebar-cta .btn { background: var(--accent); color: #fff; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; display: inline-flex; align-items: center; gap: 8px; }
        .sidebar-cta .btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,93,44,0.4); }

        /* ===== 相关文章 ===== */
        .related-section { padding: 50px 0 60px; background: var(--bg); }
        .related-section .section-title { text-align: center; margin-bottom: 40px; }
        .related-section .section-title h2 { position: relative; display: inline-block; }
        .related-section .section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--accent); margin: 12px auto 0; border-radius: 4px; }
        .related-section .section-title p { color: var(--text-light); margin-top: 8px; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .related-card {
            background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden;
            box-shadow: var(--shadow); transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            height: 180px; background: var(--bg) center/cover; position: relative;
        }
        .related-card .card-img .cat-badge {
            position: absolute; top: 12px; left: 12px;
            background: var(--accent); color: #fff; padding: 4px 14px;
            border-radius: 20px; font-size: 0.75rem; font-weight: 600;
        }
        .related-card .card-body { padding: 20px 22px 24px; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body h3 a { color: var(--primary); }
        .related-card .card-body h3 a:hover { color: var(--accent); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-light); display: flex; gap: 16px; }

        /* ===== CTA 区域 ===== */
        .article-cta {
            padding: 60px 0; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            text-align: center; color: #fff;
        }
        .article-cta h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .article-cta p { color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .article-cta .btn-group { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .article-cta .btn { padding: 14px 36px; border-radius: var(--radius-sm); font-weight: 600; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
        .article-cta .btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(232,93,44,0.35); }
        .article-cta .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232,93,44,0.5); }
        .article-cta .btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.3); color: #fff; }
        .article-cta .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

        /* ===== Footer ===== */
        .footer { background: var(--primary-dark); color: rgba(255,255,255,0.8); padding: 56px 0 0; }
        .footer .logo { color: #fff; margin-bottom: 16px; }
        .footer .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer .logo i { color: var(--accent); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; padding: 5px 0; font-size: 0.9rem; color: rgba(255,255,255,0.6); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-col a i { width: 20px; }
        .footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 0.85rem; color: rgba(255,255,255,0.5); gap: 12px; }

        /* ===== Button 通用 ===== */
        .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: var(--transition); border: none; }
        .btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 12px rgba(232,93,44,0.3); }
        .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,93,44,0.4); color: #fff; }
        .btn-outline { background: transparent; border: 2px solid var(--border); color: var(--primary); }
        .btn-outline:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            h1 { font-size: 2rem; }
            .article-banner h1 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .nav { display: none; position: absolute; top: var(--header-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); gap: 4px; }
            .nav.open { display: flex; }
            .nav a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav .nav-cta { justify-content: center; }
            .nav-toggle { display: block; }
            .article-banner { padding: 40px 0 36px; min-height: 220px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .related-card .card-img { height: 160px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-cta h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-banner .meta { gap: 12px; font-size: 0.85rem; }
            .article-body { padding: 20px 16px; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .sidebar-cta { padding: 24px 20px; }
            .article-cta .btn { width: 100%; justify-content: center; }
        }