/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0f1e3d;
  --primary-light: #1e3a5f;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --bg-light: #f5f7fb;
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select { font: inherit; }
ul, ol { list-style: none; }

/* ===== 容器 ===== */
.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 640px) {
  .container-custom { padding: 0 16px; }
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(15, 30, 61, 0.32);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.94);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 4px 30px rgba(0,0,0,0.08);
}
.logo-text {
  color: #fff;
  font-weight: 800;
  font-size: 1.28rem;
  letter-spacing: 0.01em;
  transition: color 0.3s ease;
}
.site-header.scrolled .logo-text { color: var(--primary); }
.logo-accent { color: #60a5fa; }
.site-header.scrolled .logo-accent { color: var(--accent); }
.nav-link {
  position: relative;
  color: rgba(255,255,255,0.88);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 4px;
  transition: color 0.3s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: #60a5fa;
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #60a5fa; }
.nav-link.active::after { width: 100%; background: #60a5fa; }
.site-header.scrolled .nav-link { color: var(--text-dark); }
.site-header.scrolled .nav-link:hover { color: var(--accent); }
.site-header.scrolled .nav-link.active { color: var(--accent); }
.site-header.scrolled .nav-link::after,
.site-header.scrolled .nav-link.active::after { background: var(--accent); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,99,235,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: rgba(255,255,255,0.14);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.25);
}
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,21,38,0.88) 0%, rgba(15,30,61,0.72) 45%, rgba(30,58,95,0.48) 100%);
}
.hero-content { position: relative; z-index: 2; padding-top: 120px; padding-bottom: 80px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  padding: 6px 18px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-bottom: 24px;
}
.hero-title {
  font-size: 3.4rem;
  line-height: 1.15;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 40px;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
}
.hero-meta-item i { color: #60a5fa; font-size: 1rem; }

/* ===== 板块 ===== */
.section { padding: 84px 0; }
.section-alt { background: #fff; }
.section-dark { background: var(--primary); color: #fff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: #eff6ff;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 50px;
  margin-bottom: 14px;
  letter-spacing: 0.03em;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 卡片 ===== */
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.15);
}
.card-body { padding: 28px; }
.card-icon {
  width: 58px; height: 58px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  color: var(--accent);
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); }
.card-text { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

/* ===== 徽章 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #eff6ff;
  color: var(--accent);
}

/* ===== 统计 ===== */
.stats-section {
  background: linear-gradient(135deg, #0f1e3d 0%, #1e3a5f 100%);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: -60%; right: -20%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.stat-item { text-align: center; padding: 20px; position: relative; z-index: 1; }
.stat-number { font-size: 2.6rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; line-height: 1.2; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* ===== 步骤 ===== */
.step-item { position: relative; padding: 32px 20px; }
.step-number {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 20px;
  box-shadow: 0 6px 20px rgba(37,99,235,0.3);
}
.step-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; color: var(--text-dark); }
.step-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ===== FAQ ===== */
.faq-item {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 14px;
  transition: all 0.3s ease;
  cursor: pointer;
}
.faq-item:hover { border-color: rgba(37,99,235,0.2); box-shadow: var(--shadow-sm); }
.faq-question {
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dark);
  gap: 16px;
}
.faq-icon { transition: transform 0.3s ease; color: var(--accent); font-size: 0.8rem; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 400px; padding-top: 14px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #0a1526 0%, #1e3a5f 100%);
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  bottom: -50%; left: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.cta-content { position: relative; z-index: 1; text-align: center; }

/* ===== 页脚 ===== */
.site-footer {
  background: #0a1526;
  color: rgba(255,255,255,0.8);
  padding: 64px 0 0;
  position: relative;
}
.footer-brand { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-desc { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 300px; }
.footer-title { font-size: 0.95rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-link {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: color 0.3s ease;
}
.footer-link:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 48px;
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  padding: 8px 24px;
  display: none;
  z-index: 99;
  border-radius: 0 0 16px 16px;
  backdrop-filter: blur(20px);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text-dark);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active { color: var(--accent); }

/* ===== 辅助 ===== */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.divider { width: 60px; height: 3px; background: linear-gradient(90deg, #2563eb, #60a5fa); border-radius: 3px; margin: 20px auto; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .section { padding: 64px 0; }
}
@media (max-width: 768px) {
  .hero-title { font-size: 2.1rem; }
  .hero-subtitle { font-size: 1rem; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }
  .stat-number { font-size: 1.9rem; }
  .container-custom { padding: 0 20px; }
}
@media (max-width: 520px) {
  .hero-title { font-size: 1.75rem; }
  .hero-content { padding-top: 100px; }
  .btn-lg { padding: 14px 24px; font-size: 0.95rem; }
  .card-body { padding: 20px; }
  .step-item { padding: 24px 16px; }
}
/* focus 可见性 */
a:focus-visible, button:focus-visible {
  outline: 2px solid #60a5fa;
  outline-offset: 2px;
  border-radius: 4px;
}

/* roulang page: category1 */
:root {
            --primary: #0F766E;
            --primary-dark: #115E59;
            --primary-light: #14B8A6;
            --accent: #D97706;
            --ink: #1E293B;
            --ink-soft: #475569;
            --ink-faint: #64748B;
            --surface: #F8FAFC;
            --line: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-card: 0 4px 24px rgba(15, 118, 110, 0.08);
            --shadow-lift: 0 12px 40px rgba(15, 118, 110, 0.14);
        }

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

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: #FFFFFF;
            color: var(--ink);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input {
            font-family: inherit;
            outline: none;
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ===== Glass Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: all 0.35s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            box-shadow: 0 4px 30px rgba(15, 23, 42, 0.08);
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 8px 2px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary-light);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.3s ease;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link:hover::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 999px;
            box-shadow: 0 4px 16px rgba(15, 118, 110, 0.28);
            transition: all 0.3s ease;
            border: none;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 118, 110, 0.34);
            color: #FFFFFF;
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-cta:focus-visible {
            outline: 3px solid rgba(20, 184, 166, 0.4);
            outline-offset: 2px;
        }

        .mobile-menu-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--line);
            background: #FFFFFF;
            color: var(--ink);
            font-size: 18px;
            transition: all 0.25s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 16px;
            right: 16px;
            background: #FFFFFF;
            border-radius: 16px;
            box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
            padding: 16px;
            z-index: 99;
            border: 1px solid var(--line);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all 0.2s ease;
        }

        .mobile-menu a:hover {
            background: var(--surface);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 160px 0 90px;
            background: linear-gradient(135deg, rgba(15, 118, 110, 0.92) 0%, rgba(17, 94, 89, 0.96) 50%, rgba(8, 51, 68, 0.94) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #FFFFFF;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(20, 184, 166, 0.2);
            filter: blur(60px);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            left: -60px;
            bottom: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(217, 119, 6, 0.15);
            filter: blur(50px);
        }

        .page-hero .container-custom {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
            color: #E6FFFA;
        }

        .page-hero h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-top: 20px;
            margin-bottom: 16px;
        }

        .page-hero p {
            font-size: 17px;
            line-height: 1.7;
            color: rgba(226, 232, 240, 0.95);
            max-width: 600px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #FFFFFF;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 30px;
            border-radius: 999px;
            box-shadow: 0 4px 20px rgba(2, 44, 34, 0.2);
            transition: all 0.3s ease;
            border: none;
        }

        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(2, 44, 34, 0.28);
            color: var(--primary-dark);
        }

        .btn-ghost-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 30px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.36);
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.6);
            color: #FFFFFF;
        }

        .btn-ghost-light:focus-visible,
        .btn-white:focus-visible {
            outline: 3px solid rgba(20, 184, 166, 0.5);
            outline-offset: 2px;
        }

        /* ===== Section ===== */
        .section-pad {
            padding: 96px 0;
        }

        .section-pad-lg {
            padding: 112px 0;
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink);
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--ink-faint);
            line-height: 1.75;
        }

        .text-primary-gradient {
            background: linear-gradient(120deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* ===== Cards ===== */
        .card-base {
            background: #FFFFFF;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
        }

        .card-base:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift);
            border-color: rgba(15, 118, 110, 0.22);
        }

        .guide-card {
            padding: 32px;
        }

        .guide-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(20, 184, 166, 0.15));
            color: var(--primary);
            margin-bottom: 20px;
        }

        .guide-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .guide-card p {
            font-size: 14px;
            color: var(--ink-faint);
            line-height: 1.7;
        }

        .guide-card .step-num {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 32px;
            font-weight: 800;
            color: rgba(15, 118, 110, 0.1);
            line-height: 1;
        }

        /* Topic Card */
        .topic-card {
            overflow: hidden;
            border-radius: var(--radius);
            background: #FFFFFF;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
        }

        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift);
        }

        .topic-card .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
        }

        .topic-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .topic-card:hover .card-img img {
            transform: scale(1.05);
        }

        .topic-card .card-body {
            padding: 24px;
        }

        .topic-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .topic-card .card-body p {
            font-size: 14px;
            color: var(--ink-faint);
            line-height: 1.65;
        }

        /* ===== Steps ===== */
        .step-item {
            position: relative;
            padding-left: 56px;
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 44px;
            bottom: -12px;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary-light), rgba(20, 184, 166, 0.2));
        }

        .step-item:last-child::before {
            display: none;
        }

        .step-dot {
            position: absolute;
            left: 0;
            top: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(15, 118, 110, 0.28);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--ink-faint);
            line-height: 1.65;
        }

        /* ===== Stats ===== */
        .stats-bar {
            background: linear-gradient(120deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            border-radius: 24px;
            padding: 48px 40px;
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .stats-bar::before {
            content: '';
            position: absolute;
            right: -40px;
            top: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .stats-bar::after {
            content: '';
            position: absolute;
            left: 20%;
            bottom: -80px;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .stat-item {
            text-align: center;
            padding: 12px;
            position: relative;
            z-index: 2;
        }

        .stat-item .num {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-item .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 6px;
            font-weight: 400;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(15, 118, 110, 0.2);
            box-shadow: 0 4px 16px rgba(15, 118, 110, 0.06);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #FFFFFF;
        }

        .faq-item .faq-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--ink-faint);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(120deg, var(--primary-dark), var(--primary));
            border-radius: 24px;
            padding: 64px;
            position: relative;
            overflow: hidden;
            text-align: center;
            color: #FFFFFF;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            left: -60px;
            top: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            right: -40px;
            bottom: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(20, 184, 166, 0.18);
        }

        .cta-section h2 {
            font-size: clamp(26px, 3.5vw, 40px);
            font-weight: 800;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 520px;
            margin: 0 auto 32px;
            position: relative;
            z-index: 2;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            position: relative;
            z-index: 2;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 32px;
        }

        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            background: linear-gradient(120deg, #5EEAD4, #2DD4BF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 14px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: #94A3B8;
            margin-bottom: 8px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-link {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 6px 0;
            transition: all 0.25s ease;
        }

        .footer-link:hover {
            color: #5EEAD4;
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.15);
            padding-top: 24px;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom p {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 4px;
        }

        /* ===== Focus states ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(20, 184, 166, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Utility ===== */
        .bg-soft {
            background: var(--surface);
        }

        .divider {
            width: 56px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            margin: 0 auto 0px;
            margin-bottom: 4px;
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(15, 118, 110, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section-pad {
                padding: 80px 0;
            }
            .section-pad-lg {
                padding: 88px 0;
            }
            .page-hero {
                padding: 140px 0 70px;
            }
            .cta-section {
                padding: 48px 32px;
            }
        }

        @media (max-width: 768px) {
            .section-pad {
                padding: 64px 0;
            }
            .section-pad-lg {
                padding: 72px 0;
            }
            .page-hero {
                padding: 120px 0 60px;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .stats-bar {
                padding: 40px 24px;
                border-radius: 20px;
            }
            .cta-section {
                padding: 40px 24px;
                border-radius: 20px;
            }
            .step-item {
                padding-left: 48px;
            }
            .step-item::before {
                left: 18px;
            }
            .step-dot {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 12px;
            }
            .section-pad {
                padding: 48px 0;
            }
            .section-pad-lg {
                padding: 56px 0;
            }
            .page-hero {
                padding: 104px 0 52px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-white,
            .btn-ghost-light {
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn-white,
            .cta-actions .btn-ghost-light {
                justify-content: center;
            }
            .stats-bar {
                padding: 32px 20px;
            }
            .guide-card {
                padding: 24px;
            }
            .step-item {
                padding-left: 44px;
            }
            .step-item::before {
                left: 16px;
            }
            .step-dot {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
        }

/* roulang page: article */
:root {
  --brand: #2563eb;
  --brand-dark: #1e40af;
  --brand-light: #60a5fa;
  --accent: #d97706;
  --accent-light: #fbbf24;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #16213e;
  --text-secondary: #5b6b7f;
  --border: #e3e9f1;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 24px;
  --shadow-xs: 0 2px 8px rgba(22, 33, 62, 0.05);
  --shadow-sm: 0 4px 14px rgba(22, 33, 62, 0.07);
  --shadow-md: 0 10px 30px rgba(22, 33, 62, 0.09);
  --shadow-lg: 0 20px 50px rgba(22, 33, 62, 0.12);
  --transition: 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.3s; }
button, input, textarea { font-family: inherit; }

.container-custom {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container-custom { padding: 0 16px; }
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.55);
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 6px 24px rgba(30, 41, 59, 0.08);
}
.site-logo {
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.nav-link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  padding: 8px 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  transition: width 0.3s;
}
.nav-link:hover { color: var(--brand); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--brand); font-weight: 600; }

.mobile-menu {
  display: none;
  position: fixed;
  top: 78px;
  left: 16px;
  right: 16px;
  background: var(--surface);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 14px;
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 10px;
  font-weight: 500;
  color: var(--text);
  transition: background 0.3s;
}
.mobile-menu a:hover { background: #f0f4ff; color: var(--brand); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  line-height: 1;
}
.btn-sm { padding: 9px 20px; font-size: 0.875rem; }
.btn-md { padding: 13px 28px; font-size: 0.95rem; }
.btn-lg { padding: 16px 38px; font-size: 1rem; }
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.35);
}
.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(30, 64, 175, 0.35);
  color: var(--brand-dark);
}
.btn-outline:hover {
  background: rgba(37, 99, 235, 0.06);
  border-color: var(--brand);
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  box-shadow: 0 6px 18px rgba(217, 119, 6, 0.25);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(217, 119, 6, 0.35);
}
.btn-white {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 150px 0 64px;
  background:
    linear-gradient(to bottom, rgba(255, 255, 255, 0.92), rgba(248, 250, 252, 0.97)),
    url('/assets/images/backpic/back-1.png') center/cover;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
}
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb-sep { color: #b6c2d1; }
.article-hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
  max-width: 860px;
  margin-bottom: 18px;
  color: var(--text);
}
.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-meta-item svg { width: 16px; height: 16px; opacity: 0.7; }

/* ===== Article Card ===== */
.article-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.6);
}
.article-card-cover {
  aspect-ratio: 16 / 7;
  overflow: hidden;
  background: #eef2f7;
}
.article-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-body {
  padding: 42px;
}
.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.4;
}
.article-body h1 { font-size: 1.7rem; margin-top: 8px; }
.article-body h2 { font-size: 1.45rem; margin-top: 34px; }
.article-body h3 { font-size: 1.2rem; margin-top: 26px; }
.article-body p {
  margin-bottom: 20px;
  color: #334155;
  font-size: 1rem;
  line-height: 1.85;
}
.article-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--accent); }
.article-body ul,
.article-body ol { margin: 0 0 20px 24px; color: #334155; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body img {
  border-radius: 12px;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}
.article-body blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  background: #f0f5ff;
  border-left: 4px solid var(--brand);
  border-radius: 0 12px 12px 0;
  color: #334155;
  font-style: italic;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}
.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-body th { background: #f8fafc; font-weight: 600; }
.article-body code {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
}
.article-body pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-body pre code { background: transparent; color: inherit; padding: 0; }

/* ===== Article Not Found ===== */
.article-not-found {
  padding: 90px 30px;
  text-align: center;
}
.not-found-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #f0f4ff;
  font-size: 1.8rem;
  margin-bottom: 20px;
}
.article-not-found h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}
.article-not-found p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* ===== Article Meta Bottom ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  background: #f0f4ff;
  color: #334e8f;
  border: 1px solid rgba(37, 99, 235, 0.12);
  transition: all 0.3s;
}
.tag:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
.article-bottom-bar {
  border-top: 1px solid var(--border);
  margin-top: 36px;
  padding-top: 24px;
}

/* ===== Sidebar ===== */
.sidebar-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  padding: 26px;
  margin-bottom: 24px;
  border: 1px solid rgba(226, 232, 240, 0.55);
}
.sidebar-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 10px;
  position: relative;
  display: inline-block;
}
.sidebar-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 3px;
  background: var(--brand);
  border-radius: 4px;
}
.sidebar-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--border);
  transition: all 0.3s;
}
.sidebar-list a:hover {
  color: var(--brand);
  padding-left: 6px;
}
.sidebar-list a:last-child { border-bottom: none; }
.sidebar-link-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #eff6ff;
  color: var(--brand);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* ===== Related Cards ===== */
.section-title {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 800;
  color: var(--text);
  position: relative;
  padding-bottom: 14px;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--accent-light));
}
.related-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.5);
  transition: all 0.4s;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.related-card-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #eef2f7;
}
.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.related-card:hover .related-card-img img { transform: scale(1.04); }
.related-card-body { padding: 22px; }
.related-card-cat {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand);
  background: #eff6ff;
  padding: 4px 12px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 10px;
}
.related-card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 10px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.3s;
}
.related-card:hover .related-card-title { color: var(--brand); }
.related-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== CTA ===== */
.cta-card {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a, #1e3a8a);
  box-shadow: var(--shadow-lg);
  color: #fff;
  padding: 0;
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover;
  opacity: 0.28;
}
.cta-inner {
  position: relative;
  z-index: 1;
  padding: 60px;
  text-align: center;
}
.cta-inner h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-inner p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0 auto 30px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 60px 0 0;
  margin-top: 80px;
}
.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: #94a3b8;
}
.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-link {
  display: block;
  font-size: 0.9rem;
  color: #94a3b8;
  margin-bottom: 10px;
  transition: color 0.3s;
}
.footer-link:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  margin-top: 40px;
  font-size: 0.85rem;
  color: #64748b;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-body { padding: 30px; }
  .cta-inner { padding: 48px 32px; }
}
@media (max-width: 768px) {
  .article-hero { padding: 120px 0 44px; }
  .article-body { padding: 24px; }
  .cta-inner { padding: 38px 24px; }
  .site-footer { margin-top: 60px; }
}
@media (max-width: 520px) {
  .article-body { padding: 20px; }
  .article-hero h1 { font-size: 1.5rem; }
  .cta-inner h2 { font-size: 1.4rem; }
  .cta-inner p { font-size: 0.92rem; }
  .btn-lg { padding: 14px 28px; font-size: 0.92rem; }
}