/* roulang page: index */
:root {
  --primary: #0a1628;
  --primary-light: #132642;
  --accent: #0ea5a0;
  --accent-hover: #0c8f8b;
  --accent-light: rgba(14, 165, 160, 0.12);
  --bg: #f0f4f8;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max-w: 1200px;
  --nav-h: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
button { cursor: pointer; background: none; }
ul, ol { list-style: none; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-title { font-size: 34px; font-weight: 700; color: var(--primary); letter-spacing: -0.5px; }
.section-sub { font-size: 17px; color: var(--text-secondary); margin-top: 12px; max-width: 640px; margin-left: auto; margin-right: auto; }
.section-divider { width: 48px; height: 4px; background: var(--accent); border-radius: 2px; margin: 16px auto 0; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
  transition: all var(--transition); border: 2px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,160,0.30); }
.btn-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--bg); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.10); }
.btn-lg { padding: 16px 36px; font-size: 17px; border-radius: var(--radius-md); }

.badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: 13px; font-weight: 500; background: var(--accent-light); color: var(--accent);
}

/* ===== Navigation ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h); background: rgba(255,255,255,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border); transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header .container { display: flex; align-items: center; height: 100%; }
.logo { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: -0.3px; display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 36px; height: 36px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; }
.nav { display: flex; align-items: center; gap: 8px; margin-left: 40px; flex: 1; }
.nav a {
  padding: 8px 18px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500;
  color: var(--text-secondary); transition: all var(--transition); position: relative;
}
.nav a:hover { color: var(--primary); background: var(--border-light); }
.nav a.active { color: var(--accent); background: var(--accent-light); }
.nav-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.search-box {
  display: flex; align-items: center; background: var(--border-light); border-radius: 24px;
  padding: 0 16px; height: 40px; border: 1px solid transparent; transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--accent); background: #fff; }
.search-box input { background: none; border: none; padding: 8px 0; width: 160px; font-size: 14px; color: var(--text); }
.search-box input::placeholder { color: var(--text-light); }
.search-box i { color: var(--text-light); font-size: 14px; }
.hamburger { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--radius-sm); color: var(--text); font-size: 20px; cursor: pointer; background: var(--border-light); }
.hamburger:hover { background: var(--border); }

/* ===== Hero ===== */
.hero {
  min-height: 620px; display: flex; align-items: center; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  margin-top: var(--nav-h);
}
.hero-bg {
  position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.18; pointer-events: none;
}
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10,22,40,0.88) 0%, rgba(10,22,40,0.72) 100%); }
.hero .container { position: relative; z-index: 2; text-align: center; padding: 80px 24px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(14,165,160,0.18); color: #5eead4; padding: 6px 18px; border-radius: 24px; font-size: 14px; font-weight: 500; margin-bottom: 24px; border: 1px solid rgba(14,165,160,0.25); }
.hero h1 { font-size: clamp(36px, 6vw, 58px); font-weight: 800; color: #fff; line-height: 1.15; letter-spacing: -1px; }
.hero h1 span { color: #5eead4; }
.hero p { font-size: clamp(16px, 2vw, 20px); color: rgba(255,255,255,0.7); margin-top: 20px; max-width: 640px; margin-left: auto; margin-right: auto; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 36px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 52px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 32px; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
.hero-stat-num span { color: #5eead4; }
.hero-stat-label { font-size: 14px; color: rgba(255,255,255,0.55); margin-top: 4px; }
.hero-stat-divider { width: 1px; height: 48px; background: rgba(255,255,255,0.12); align-self: center; }

/* ===== Features ===== */
.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.feature-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 36px 28px;
  border: 1px solid var(--border); transition: all var(--transition); text-align: center;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.feature-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--accent-light); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 24px; margin: 0 auto 18px; }
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); }
.feature-card p { font-size: 15px; color: var(--text-secondary); margin-top: 10px; line-height: 1.7; }

/* ===== Category Entry ===== */
.category-entry { background: var(--primary); position: relative; overflow: hidden; }
.category-entry::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.10; pointer-events: none; }
.category-entry .container { position: relative; z-index: 2; }
.category-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.cat-card {
  background: rgba(255,255,255,0.06); border-radius: var(--radius-lg); padding: 32px;
  border: 1px solid rgba(255,255,255,0.08); transition: all var(--transition); display: flex; gap: 24px; align-items: flex-start;
}
.cat-card:hover { background: rgba(255,255,255,0.10); border-color: rgba(14,165,160,0.30); transform: translateY(-4px); }
.cat-card-img { width: 120px; height: 90px; border-radius: var(--radius-md); object-fit: cover; flex-shrink: 0; background: var(--primary-light); }
.cat-card h3 { font-size: 20px; font-weight: 700; color: #fff; }
.cat-card p { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 8px; line-height: 1.6; }
.cat-card .btn { margin-top: 14px; }

/* ===== News / CMS List ===== */
.news-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.news-card {
  background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); transition: all var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-card-img { width: 100%; height: 200px; object-fit: cover; background: var(--border-light); }
.news-card-body { padding: 24px; }
.news-card-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-light); margin-bottom: 10px; }
.news-card-cat { background: var(--accent-light); color: var(--accent); padding: 2px 12px; border-radius: 12px; font-weight: 500; font-size: 12px; }
.news-card h3 { font-size: 18px; font-weight: 700; color: var(--primary); line-height: 1.4; }
.news-card p { font-size: 15px; color: var(--text-secondary); margin-top: 10px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-empty { grid-column: 1 / -1; text-align: center; padding: 48px; color: var(--text-light); font-size: 16px; background: var(--bg-card); border-radius: var(--radius-lg); border: 1px dashed var(--border); }

/* ===== Data / Stats ===== */
.data-stats { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 48px 40px; }
.data-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.data-item { padding: 16px; }
.data-num { font-size: 40px; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.data-num span { color: var(--accent); }
.data-label { font-size: 15px; color: var(--text-secondary); margin-top: 6px; }
.data-divider { width: 1px; height: 60px; background: var(--border); align-self: center; }

/* ===== Process ===== */
.process-steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; margin: 0 auto 16px; position: relative; z-index: 2; }
.process-step h4 { font-size: 18px; font-weight: 700; color: var(--primary); }
.process-step p { font-size: 14px; color: var(--text-secondary); margin-top: 8px; line-height: 1.6; }
.process-line { position: absolute; top: 24px; left: calc(50% + 32px); right: calc(-50% + 32px); height: 2px; background: var(--border); z-index: 0; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border); overflow: hidden; transition: all var(--transition); }
.faq-item:hover { border-color: var(--accent); }
.faq-q { padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; font-size: 16px; color: var(--primary); gap: 16px; user-select: none; }
.faq-q i { color: var(--text-light); transition: transform var(--transition); font-size: 14px; }
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--accent); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 24px; color: var(--text-secondary); font-size: 15px; line-height: 1.7; }
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section { background: var(--primary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat; opacity: 0.08; pointer-events: none; }
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { font-size: 34px; font-weight: 700; color: #fff; }
.cta-section p { font-size: 17px; color: rgba(255,255,255,0.65); margin-top: 14px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 16px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }

/* ===== Footer ===== */
.footer { background: var(--primary); border-top: 1px solid rgba(255,255,255,0.06); padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .logo { color: #fff; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); margin-top: 14px; line-height: 1.7; max-width: 300px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.5); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: all var(--transition); }
.footer-social a:hover { background: var(--accent); color: #fff; }
.footer h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.5); transition: all var(--transition); }
.footer-links a:hover { color: #5eead4; padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); margin-top: 40px; padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.35); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2,1fr); }
  .data-grid { grid-template-columns: repeat(2,1fr); }
  .data-divider:nth-child(2) { display: none; }
  .process-steps { grid-template-columns: repeat(2,1fr); }
  .process-line { display: none; }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .nav { display: none; }
  .nav.mobile-open { display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 4px; }
  .nav.mobile-open a { padding: 12px 16px; width: 100%; }
  .nav-right .search-box { display: none; }
  .hamburger { display: flex; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 24px; }
  .hero-stat-divider { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .cat-card { flex-direction: column; }
  .cat-card-img { width: 100%; height: 140px; }
  .news-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .data-divider { display: none; }
  .process-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .section-title { font-size: 26px; }
  .cta-section h2 { font-size: 26px; }
  .data-stats { padding: 24px 16px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 15px; }
  .hero-stat-num { font-size: 24px; }
  .data-grid { grid-template-columns: 1fr; }
  .data-item { padding: 12px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn-lg { padding: 14px 24px; font-size: 15px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1040a0;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0891b2;
            --secondary-light: #22d3ee;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --success: #10b981;
            --danger: #ef4444;
            --dark: #0f172a;
            --dark-soft: #1e293b;
            --gray-900: #111827;
            --gray-800: #1f2937;
            --gray-700: #374151;
            --gray-600: #4b5563;
            --gray-500: #6b7280;
            --gray-400: #9ca3af;
            --gray-300: #d1d5db;
            --gray-200: #e5e7eb;
            --gray-100: #f3f4f6;
            --gray-50: #f9fafb;
            --white: #ffffff;
            --body-bg: #f8fafc;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.14);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--body-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        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;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--dark);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Nav (SaaS Command Bar Style) ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            color: #fff;
            font-size: 18px;
        }
        .logo:hover {
            color: var(--dark);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 20px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 8px;
            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-bg);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--gray-100);
            border-radius: 10px;
            padding: 0 14px;
            height: 40px;
            border: 1px solid transparent;
            transition: all var(--transition);
            width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            background: var(--white);
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
        }
        .search-box i {
            color: var(--text-lighter);
            font-size: 14px;
            margin-right: 8px;
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            font-size: 14px;
            color: var(--text);
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-lighter);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.30);
            white-space: nowrap;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.35);
            color: #fff;
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: var(--gray-100);
            color: var(--text);
            font-size: 20px;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--gray-200);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
            z-index: 999;
            box-shadow: var(--shadow-lg);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }

        @media (max-width: 900px) {
            .nav {
                display: none;
            }
            .search-box {
                width: 140px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-actions .btn-cta span {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .search-box {
                width: 100px;
            }
            .search-box input {
                font-size: 13px;
            }
            .header-actions .btn-cta {
                padding: 10px 14px;
            }
            .logo {
                font-size: 18px;
            }
            .logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
        }

        /* ===== Banner / Hero (Inner) ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            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::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26, 86, 219, 0.25) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(8, 145, 178, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: var(--gray-400);
            margin-bottom: 20px;
        }
        .page-banner .breadcrumb a {
            color: var(--gray-400);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .page-banner .breadcrumb .sep {
            color: var(--gray-600);
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-banner p {
            font-size: 18px;
            color: var(--gray-300);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            color: var(--gray-200);
            margin-bottom: 24px;
        }
        .page-banner .banner-badge i {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 52px;
                min-height: 260px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner p {
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 24px;
            }
            .page-banner p {
                font-size: 14px;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-dark {
            background: var(--dark-soft);
            color: var(--gray-200);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            color: var(--dark);
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-header .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
            .section-header {
                margin-bottom: 40px;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 28px;
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        @media (max-width: 1024px) {
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
                gap: 20px;
            }
            .card-grid.cols-2 {
                grid-template-columns: 1fr;
            }
            .card-grid.cols-4 {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--gray-100);
        }
        .card .card-body {
            padding: 24px 20px 20px;
        }
        .card .card-body .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-bottom: 10px;
        }
        .card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 13px;
            color: var(--text-lighter);
        }
        .card .card-body .card-meta i {
            margin-right: 4px;
        }
        .card .card-footer {
            padding: 14px 20px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--gray-50);
        }
        .card .card-footer a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .card .card-footer a:hover {
            color: var(--primary-dark);
        }
        .card-feature {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 32px 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card-feature:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-feature .icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 18px;
            background: var(--primary);
        }
        .card-feature h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card-feature p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            background: var(--gray-100);
            color: var(--text);
        }
        .badge-primary {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .badge-success {
            background: #ecfdf5;
            color: var(--success);
        }
        .badge-warning {
            background: #fffbeb;
            color: var(--accent-dark);
        }
        .badge-hot {
            background: #fef2f2;
            color: var(--danger);
        }

        /* ===== Stats / Data Blocks ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-block {
            text-align: center;
            padding: 32px 16px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-block:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-block .number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-block .label {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-block .number {
                font-size: 30px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }

        /* ===== List / Article List ===== */
        .list-group {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .list-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .list-item .rank {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            background: var(--gray-300);
            flex-shrink: 0;
        }
        .list-item .rank.top1 {
            background: linear-gradient(135deg, #f59e0b, #f97316);
        }
        .list-item .rank.top2 {
            background: linear-gradient(135deg, #94a3b8, #64748b);
        }
        .list-item .rank.top3 {
            background: linear-gradient(135deg, #cd7f32, #b45309);
        }
        .list-item .info {
            flex: 1;
            min-width: 0;
        }
        .list-item .info h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .list-item .info p {
            font-size: 13px;
            color: var(--text-light);
        }
        .list-item .meta {
            font-size: 13px;
            color: var(--text-lighter);
            white-space: nowrap;
            flex-shrink: 0;
        }
        @media (max-width: 640px) {
            .list-item {
                padding: 14px 16px;
                flex-wrap: wrap;
                gap: 10px;
            }
            .list-item .meta {
                width: 100%;
                text-align: left;
                padding-left: 54px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-item .faq-q:hover {
            background: var(--gray-50);
        }
        .faq-item .faq-q i {
            color: var(--text-lighter);
            transition: transform var(--transition);
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }
        @media (max-width: 640px) {
            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-a {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, #0f172a, #1e293b);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--gray-300);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.35);
            color: #fff;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
        }
        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
            color: #fff;
        }
        @media (max-width: 640px) {
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 24px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--dark-soft);
            padding: 56px 0 0;
            color: var(--gray-300);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--gray-400);
            max-width: 360px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--gray-400);
            font-size: 16px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--gray-400);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
        }
        .footer-links a i {
            width: 20px;
            margin-right: 6px;
            color: var(--gray-500);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            font-size: 13px;
            color: var(--gray-500);
        }
        .footer-bottom p:last-child {
            color: var(--gray-600);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
        }

        /* ===== Table (赛事数据) ===== */
        .table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background: var(--white);
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 600px;
        }
        .table-wrap th {
            background: var(--gray-50);
            font-weight: 600;
            color: var(--text);
            padding: 14px 18px;
            text-align: left;
            border-bottom: 2px solid var(--border);
            white-space: nowrap;
        }
        .table-wrap td {
            padding: 12px 18px;
            border-bottom: 1px solid var(--gray-100);
            color: var(--text);
        }
        .table-wrap tr:last-child td {
            border-bottom: none;
        }
        .table-wrap tr:hover td {
            background: var(--primary-bg);
        }
        .table-wrap .status {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }
        .table-wrap .status.live {
            background: #fef2f2;
            color: var(--danger);
        }
        .table-wrap .status.upcoming {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .table-wrap .status.finished {
            background: #ecfdf5;
            color: var(--success);
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1024px) {
            .page-banner h1 {
                font-size: 36px;
            }
        }
        @media (max-width: 768px) {
            .page-banner h1 {
                font-size: 28px;
            }
            .section-header h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .card .card-img {
                height: 160px;
            }
            .card-feature {
                padding: 24px 18px;
            }
            .card-feature .icon {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
        }

        /* ===== Smooth scroll offset ===== */
        .scroll-offset {
            scroll-margin-top: calc(var(--header-height) + 24px);
        }

        /* ===== Floating back to top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(26, 86, 219, 0.30);
            transition: all var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            z-index: 900;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            color: #fff;
        }
        @media (max-width: 640px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f766e;
            --primary-light: #14b8a6;
            --primary-dark: #0d5e57;
            --primary-bg: #ecfdf5;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: 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;
            transition: var(--transition);
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            background: var(--primary);
            color: #fff;
            justify-content: center;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(15, 118, 110, 0.3);
            color: #fff;
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: 0 8px 25px rgba(245, 158, 11, 0.3);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.3px;
            transition: var(--transition);
        }
        .badge-accent {
            background: #fef3c7;
            color: var(--accent-dark);
        }
        .badge:hover {
            transform: translateY(-1px);
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .logo:hover .logo-icon {
            background: var(--primary-dark);
            transform: rotate(-8deg);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            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-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 6px 16px 6px 18px;
            transition: var(--transition);
            max-width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
            background: #fff;
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 6px 0;
            font-size: 0.9rem;
            width: 120px;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            background: transparent;
            color: var(--text-light);
            cursor: pointer;
            font-size: 0.95rem;
            padding: 4px;
        }
        .search-box button:hover {
            color: var(--primary);
        }
        .nav-cta {
            padding: 10px 24px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 118, 110, 0.3);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }
        .nav-toggle:hover {
            background: var(--bg);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            z-index: 999;
            flex-direction: column;
            gap: 12px;
            max-height: 80vh;
            overflow-y: auto;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-nav .nav-cta {
            text-align: center;
            margin-top: 8px;
        }

        /* ===== Hero / Banner ===== */
        .article-hero {
            padding: 140px 0 60px;
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f766e 100%);
            color: #fff;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }
        .article-hero .badge {
            background: rgba(255,255,255,0.15);
            color: #fff;
            backdrop-filter: blur(4px);
            margin-bottom: 20px;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            color: var(--accent);
        }
        .article-hero .description {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 20px auto 0;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-body .featured-image {
            margin: -40px -44px 32px;
            border-radius: var(--radius) var(--radius) 0 0;
            overflow: hidden;
            max-height: 420px;
        }
        .article-body .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.4rem;
            color: var(--text);
        }
        .article-body .content h2, 
        .article-body .content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .article-body .content ul, 
        .article-body .content ol {
            list-style: disc;
            padding-left: 24px;
            margin-bottom: 1.4rem;
        }
        .article-body .content li {
            margin-bottom: 0.5rem;
            color: var(--text-secondary);
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags .badge {
            background: var(--bg);
            color: var(--text-secondary);
        }
        .article-tags .badge:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }
        .article-share span {
            font-weight: 600;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-share a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .sidebar-widget h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-bg);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h3 i {
            color: var(--primary);
        }
        .sidebar-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .sidebar-list a:hover {
            color: var(--primary);
        }
        .sidebar-list a img {
            width: 64px;
            height: 48px;
            object-fit: cover;
            border-radius: 6px;
            flex-shrink: 0;
        }
        .sidebar-list .post-title {
            font-size: 0.9rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .sidebar-list .post-date {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 {
            color: #fff;
            border-bottom-color: rgba(255,255,255,0.2);
        }
        .sidebar-cta h3 i {
            color: var(--accent);
        }
        .sidebar-cta p {
            color: rgba(255,255,255,0.8);
            font-size: 0.9rem;
            margin: 12px 0 20px;
        }
        .sidebar-cta .btn {
            background: #fff;
            color: var(--primary);
        }
        .sidebar-cta .btn:hover {
            background: var(--accent);
            color: #1e293b;
        }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-image {
            height: 180px;
            overflow: hidden;
        }
        .related-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-image img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .badge {
            margin-bottom: 10px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a {
            color: var(--text);
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .faq-section .section-header h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
        }
        .faq-section .section-header p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 24px;
            background: var(--bg-card);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--primary-bg);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            background: var(--bg-card);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f766e 100%);
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .cta-section::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;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 1.1rem;
            margin-bottom: 32px;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
        }
        .cta-section .btn:hover {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.3);
        }
        .cta-section .btn-outline-light {
            background: transparent;
            border-color: rgba(255,255,255,0.4);
            color: #fff;
        }
        .cta-section .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .footer-brand .logo .logo-icon {
            background: var(--primary-light);
        }
        .footer-brand p {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            margin-bottom: 20px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 600;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.3);
        }
        .footer-bottom p {
            margin: 0;
            color: rgba(255,255,255,0.3);
        }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 100px 24px;
            max-width: 560px;
            margin: 0 auto;
        }
        .not-found i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found h2 {
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== 响应式 ===== */
        @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;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
            
            .nav { display: none; }
            .nav-toggle { display: block; }
            .nav-right .search-box { display: none; }
            
            .article-hero {
                padding: 100px 0 40px;
                min-height: 280px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .meta {
                gap: 12px;
                font-size: 0.85rem;
                flex-direction: column;
            }
            
            .article-body {
                padding: 24px 20px;
            }
            .article-body .featured-image {
                margin: -24px -20px 24px;
                max-height: 220px;
            }
            
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
            
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            
            .sidebar-cta {
                padding: 24px 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-body {
                padding: 16px 14px;
            }
            .article-body .featured-image {
                margin: -16px -14px 16px;
                max-height: 180px;
            }
            .related-card .card-image {
                height: 140px;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn {
                width: 100%;
                max-width: 280px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
        }