/* roulang page: index */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  --text-primary: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --bg-soft: #f4f7fa;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.05);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #64748b;
  border-radius: 0.65rem;
  transition: all 0.25s ease;
  position: relative;
}
.nav-link:hover { color: #0b1f30; background: #f1f5f9; }
.nav-link.active { color: #0d9488; background: #f0fdfa; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: #14b8a6;
  border-radius: 2px;
}
.mobile-link {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  border-radius: 0.6rem;
  transition: all 0.2s ease;
}
.mobile-link:hover { background: #f1f5f9; color: #0b1f30; }
.mobile-link.active { color: #0d9488; background: #f0fdfa; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn:focus-visible, .nav-link:focus-visible, a:focus-visible {
  outline: 2px solid #14b8a6;
  outline-offset: 2px;
}
.btn-primary {
  background: #0b1f30;
  color: #ffffff;
  border-color: #0b1f30;
  box-shadow: 0 4px 14px rgba(11,31,48,0.25);
}
.btn-primary:hover {
  background: #14374f;
  border-color: #14374f;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(11,31,48,0.30);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: rgba(255,255,255,0.08);
  color: #ffffff;
  border-color: rgba(255,255,255,0.35);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-1px);
}
.btn-ghost-light {
  background: rgba(255,255,255,0.1);
  color: #ffffff;
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline {
  background: transparent;
  color: #0d9488;
  border-color: #0d9488;
}
.btn-outline:hover {
  background: #f0fdfa;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(13,148,136,0.12);
}
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; border-radius: 0.875rem; }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; border-radius: 0.6rem; }

.section-head { max-width: 640px; margin: 0 auto; text-align: center; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #0d9488;
  background: #f0fdfa;
  border: 1px solid #ccfbf1;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  text-transform: uppercase;
}
.section-title {
  margin-top: 0.9rem;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #0b1f30;
}
.section-desc {
  margin-top: 0.6rem;
  font-size: 1rem;
  line-height: 1.75;
  color: #64748b;
}
@media (min-width: 768px) {
  .section-title { font-size: 2rem; }
}

.kpi-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-color: #bbf7d0;
}
.kpi-icon {
  width: 52px;
  height: 52px;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.kpi-value {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #0b1f30;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.kpi-label { font-size: 0.8rem; color: #64748b; margin-top: 0.2rem; }

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, #14b8a6, #2dd4bf);
  opacity: 0.6;
}
.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #0d9488;
  background: #f0fdfa;
  border: 1px solid #ccfbf1;
}
.feature-card h3 { font-size: 1.125rem; font-weight: 700; margin-top: 1.25rem; color: #0f172a; }
.feature-card p { font-size: 0.9rem; line-height: 1.7; color: #64748b; margin-top: 0.6rem; }

.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: block;
  box-shadow: var(--shadow-card);
  transition: all 0.4s ease;
  isolation: isolate;
}
.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7,20,34,0.85) 0%, rgba(7,20,34,0.3) 45%, rgba(7,20,34,0.05) 100%);
  z-index: 1;
  pointer-events: none;
}
.category-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.category-card:hover img { transform: scale(1.05); }
.category-card:hover { box-shadow: 0 16px 40px rgba(0,0,0,0.15); }
.category-card-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.5rem;
  z-index: 2;
  color: #fff;
}
.category-card-content h3 { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.01em; }
.category-card-content p { font-size: 0.85rem; color: rgba(255,255,255,0.8); margin-top: 0.35rem; line-height: 1.6; }
.category-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #2dd4bf;
  transition: gap 0.3s ease;
}
.category-card:hover .category-card-arrow { gap: 0.7rem; }

.news-card {
  display: block;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  overflow: hidden;
}
.news-card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
  border-color: #99f6e4;
  transform: translateY(-2px);
}
.news-card-inner { position: relative; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.badge-teal { background: #f0fdfa; color: #0d9488; border: 1px solid #ccfbf1; }
.badge-blue { background: #eff6ff; color: #2563eb; border: 1px solid #dbeafe; }
.badge-amber { background: #fffbeb; color: #d97706; border: 1px solid #fef3c7; }

.step-card {
  text-align: center;
  padding: 2rem 1.25rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  position: relative;
  transition: all 0.3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}
.step-num {
  width: 52px;
  height: 52px;
  margin: 0 auto;
  border-radius: 50%;
  background: #0b1f30;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 4px 14px rgba(11,31,48,0.25);
}
.step-card h3 { font-size: 1.05rem; font-weight: 700; margin-top: 1rem; }
.step-card p { font-size: 0.85rem; color: #64748b; line-height: 1.6; margin-top: 0.5rem; }
.step-connector {
  position: absolute;
  top: 50%;
  right: -1.2rem;
  width: 2.4rem;
  height: 2px;
  background: linear-gradient(90deg, #ccfbf1, #2dd4bf);
  display: none;
  z-index: 2;
}
@media (min-width: 768px) {
  .step-connector { display: block; }
}
.step-card:last-child .step-connector { display: none; }

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item.open {
  border-color: #99f6e4;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.4rem;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 0.98rem;
  font-weight: 700;
  color: #0f172a;
  transition: background 0.2s ease;
}
.faq-question:hover { background: #f8fafc; }
.faq-question i {
  color: #14b8a6;
  font-size: 0.85rem;
  transition: transform 0.3s ease;
}
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 1.4rem 1.25rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: #64748b;
}

.cta-section {
  background: #071422;
  position: relative;
  overflow: hidden;
}
.cta-section .cta-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(7,20,34,0.85), rgba(7,20,34,0.6));
  pointer-events: none;
}

.hero-stat {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  backdrop-filter: blur(8px);
  border-radius: 0.9rem;
  padding: 0.9rem 0.6rem;
  text-align: center;
  transition: all 0.3s ease;
}
.hero-stat:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.3);
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: #e2e8f0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-link {
  display: block;
  font-size: 0.85rem;
  color: #94a3b8;
  padding: 0.3rem 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-link:hover { color: #2dd4bf; padding-left: 4px; }

@media (max-width: 640px) {
  .kpi-card { padding: 1.1rem; }
  .kpi-icon { width: 44px; height: 44px; font-size: 1.1rem; }
  .kpi-value { font-size: 1.35rem; }
  .section-title { font-size: 1.5rem; }
}

::selection { background: #14b8a6; color: #fff; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* roulang page: category1 */
:root {
    --primary-50: #eef4f8;
    --primary-100: #d5e3ec;
    --primary-200: #aec8db;
    --primary-300: #7da6c3;
    --primary-400: #4a7fa3;
    --primary-500: #2d5f7e;
    --primary-600: #1f485f;
    --primary-700: #19394d;
    --primary-800: #122a3a;
    --primary-900: #0d1f2b;
    --primary-950: #07131c;
    --accent-300: #5eead4;
    --accent-400: #2dd4bf;
    --accent-500: #14b8a6;
    --accent-600: #0d9488;
    --bg-body: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-weak: #94a3b8;
    --border-color: #e2e8f0;
    --radius-lg: 18px;
    --radius-md: 12px;
    --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.08);
    --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.14);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

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

  body {
    font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    font-size: 16px;
  }

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

  a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
  }

  button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
  }

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

  /* 导航链接 */
  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: #94a3b8;
    border-radius: 10px;
    transition: var(--transition);
    letter-spacing: 0.02em;
  }

  .nav-link:hover {
    color: #ffffff;
    background: rgba(148, 163, 184, 0.1);
  }

  .nav-link.active {
    color: #ffffff;
    background: rgba(45, 95, 126, 0.25);
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent-400), var(--accent-500));
  }

  .nav-link:focus-visible {
    outline: 2px solid var(--accent-400);
    outline-offset: 2px;
  }

  /* 页脚 */
  .footer-heading {
    font-size: 14px;
    font-weight: 600;
    color: #e2e8f0;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
  }

  .footer-link {
    display: flex;
    align-items: center;
    font-size: 13px;
    color: #64748b;
    padding: 6px 0;
    line-height: 1.6;
    transition: var(--transition);
  }

  .footer-link:hover {
    color: #ffffff;
    padding-left: 4px;
  }

  .footer-link:focus-visible {
    outline: 2px solid var(--accent-400);
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* 通用按钮 */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-700), var(--primary-900));
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(13, 28, 43, 0.35);
    transition: var(--transition);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(13, 28, 43, 0.45);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(13, 28, 43, 0.3);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-400);
    background: transparent;
    border: 1.5px solid rgba(45, 212, 191, 0.4);
    border-radius: 12px;
    transition: var(--transition);
  }

  .btn-secondary:hover {
    background: rgba(45, 212, 191, 0.08);
    border-color: var(--accent-400);
    transform: translateY(-2px);
  }

  /* 标签 */
  .tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 999px;
    background: var(--primary-50);
    color: var(--primary-600);
    border: 1px solid transparent;
    transition: var(--transition);
  }

  .tag-teal {
    background: rgba(45, 212, 191, 0.1);
    color: var(--accent-600);
  }

  .tag-amber {
    background: rgba(245, 158, 11, 0.1);
    color: #b45309;
  }

  /* 卡片 */
  .card-hover {
    transition: var(--transition);
  }

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

  /* 板块标题 */
  .section-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--primary-950);
    line-height: 1.2;
  }

  .section-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
  }

  /* FAQ 面板 */
  .faq-item {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: #ffffff;
    overflow: hidden;
    transition: var(--transition);
  }

  .faq-item:hover {
    border-color: rgba(45, 212, 191, 0.3);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-900);
    cursor: pointer;
    transition: var(--transition);
  }

  .faq-question:hover {
    background: var(--primary-50);
  }

  .faq-answer {
    padding: 0 24px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.75;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
  }

  .faq-item.open .faq-answer {
    padding-bottom: 20px;
    max-height: 300px;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
  }

  .faq-icon {
    transition: transform 0.3s ease;
    color: var(--text-weak);
  }

  /* 筛选标签 */
  .filter-tab {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    transition: var(--transition);
    cursor: pointer;
  }

  .filter-tab:hover {
    border-color: var(--accent-400);
    color: var(--accent-600);
  }

  .filter-tab.active {
    background: linear-gradient(135deg, var(--primary-700), var(--primary-900));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(13, 28, 43, 0.25);
  }

  /* 统计卡片 */
  .stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
  }

  .stat-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
  }

  /* 背景装饰 */
  .bg-grid-pattern {
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.08) 1px, transparent 0);
    background-size: 24px 24px;
  }

  /* 移动端菜单 */
  .mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    top: 64px;
    background: rgba(7, 19, 28, 0.98);
    backdrop-filter: blur(20px);
    z-index: 40;
    padding: 24px;
  }

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

  .mobile-menu a {
    display: block;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 500;
    color: #cbd5e1;
    border-radius: 12px;
    margin-bottom: 6px;
  }

  .mobile-menu a.active {
    background: rgba(45, 212, 191, 0.12);
    color: var(--accent-400);
  }

  /* 面包屑 */
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #94a3b8;
  }

  .breadcrumb a {
    color: #94a3b8;
  }

  .breadcrumb a:hover {
    color: var(--accent-400);
  }

  .breadcrumb .sep {
    color: #475569;
    font-size: 12px;
  }

  /* 下拉箭头动画 */
  .arrow-down {
    transition: transform 0.3s ease;
  }

  /* 响应式断点补充 */
  @media (max-width: 1024px) {
    .section-title {
      font-size: 24px;
    }
  }

  @media (max-width: 640px) {
    .section-title {
      font-size: 20px;
    }
    .btn-primary, .btn-secondary {
      padding: 10px 20px;
      font-size: 13px;
    }
    .faq-question {
      padding: 14px 18px;
      font-size: 14px;
    }
    .faq-answer {
      padding: 0 18px;
    }
  }

/* roulang page: article */
:root {
  --primary-950: #081c2b;
  --primary-900: #0c2b3f;
  --primary-700: #12496c;
  --primary-600: #155a85;
  --primary-500: #1f6f9e;
  --accent-500: #14a89b;
  --accent-600: #0e857d;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --bg-body: #f8fafc;
  --border-light: #e2e8f0;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --shadow-soft: 0 8px 30px -6px rgba(15, 58, 86, 0.12);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

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

button {
  font-family: inherit;
}

.container-site {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container-site {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container-site {
    padding: 0 2rem;
  }
}

/* 导航 */
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.65rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #334155;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover {
  background-color: #f1f5f9;
  color: #0f172a;
  transform: translateY(-1px);
}

.nav-link.active {
  background-color: #eff6ff;
  color: var(--primary-700);
  font-weight: 600;
}

.nav-link:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 2px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, #155a85, #0f3a56);
  color: #ffffff;
  box-shadow: 0 4px 12px -4px rgba(15, 58, 86, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1a6597, #12496c);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -6px rgba(15, 58, 86, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px -2px rgba(15, 58, 86, 0.4);
}

.btn-outline {
  border-color: var(--border-light);
  background: #ffffff;
  color: #334155;
}

.btn-outline:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -6px rgba(51, 65, 85, 0.2);
}

.btn-accent {
  background: linear-gradient(135deg, #14a89b, #0e857d);
  color: #ffffff;
  box-shadow: 0 6px 16px -6px rgba(20, 168, 155, 0.5);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #1db8a9, #0f6b64);
  transform: translateY(-1px);
  box-shadow: 0 10px 26px -8px rgba(20, 168, 155, 0.5);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
  border-radius: 0.5rem;
}

/* 卡片/区块 */
.card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-light);
  background: #f8fafc;
  color: #475569;
}

/* 文章内容 */
.article-content {
  color: #1e293b;
  font-size: 1rem;
  line-height: 1.9;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0f172a;
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #f1f5f9;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #0f172a;
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.25rem;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content img {
  border-radius: 0.75rem;
  margin: 1.5rem 0;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
}

.article-content a {
  color: var(--primary-600);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: var(--primary-800);
}

.article-content blockquote {
  border-left: 4px solid var(--accent-500);
  background: #f0fdfa;
  padding: 1rem 1.25rem;
  border-radius: 0 0.75rem 0.75rem 0;
  margin: 1.5rem 0;
  color: #0f766e;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: #ffffff;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border-light);
  padding: 0.75rem;
  text-align: left;
}

.article-content th {
  background: #f8fafc;
  font-weight: 700;
}

/* FAQ */
.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.faq-item h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.5rem;
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* 页脚 */
.footer-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #94a3b8;
  margin-bottom: 1rem;
}

.footer-link {
  display: block;
  font-size: 0.875rem;
  color: #94a3b8;
  padding: 0.4rem 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-link:hover {
  color: #ffffff;
  transform: translateX(3px);
}

.footer-link i {
  font-size: 0.5rem;
  color: #2bc4b5;
}

/* Section heading */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #0f172a;
  line-height: 1.25;
}

@media (max-width: 640px) {
  .section-title {
    font-size: 1.5rem;
  }
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 32rem;
}

/* Banner overlay */
.banner-overlay {
  background: linear-gradient(135deg, rgba(8, 28, 43, 0.94), rgba(15, 58, 86, 0.82));
}

/* 图片外层效果 */
.img-frame {
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid var(--border-light);
}

/* 响应式细节 */
@media (max-width: 768px) {
  .article-content {
    font-size: 0.9375rem;
  }
}

/* roulang page: category2 */
:root {
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: #f8fafc;
            color: #1e293b;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        * {
            box-sizing: border-box;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #94a3b8;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
            font-weight: 600;
        }
        .nav-link i {
            font-size: 11px;
            opacity: 0.7;
        }
        .footer-heading {
            font-size: 13px;
            font-weight: 600;
            color: #e2e8f0;
            letter-spacing: 0.08em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .footer-link {
            display: block;
            font-size: 13px;
            color: #64748b;
            padding: 5px 0;
            transition: all 0.2s ease;
        }
        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(8px);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            color: #e2e8f0;
        }
        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: #3ebd93;
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(62, 189, 147, 0.8);
        }
        .section-title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.15;
            color: #0f172a;
        }
        .section-subtitle {
            font-size: 16px;
            color: #64748b;
            max-width: 640px;
            line-height: 1.7;
        }
        .step-card {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 28px 24px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            box-shadow: 0 12px 40px rgba(7, 48, 60, 0.1);
            border-color: #bae6e0;
            transform: translateY(-4px);
        }
        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #0e7c96, #052e38);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .feature-card {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 24px;
            transition: all 0.3s ease;
            height: 100%;
        }
        .feature-card:hover {
            box-shadow: 0 12px 40px rgba(7, 48, 60, 0.08);
            border-color: #bae6e0;
            transform: translateY(-3px);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .kpi-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            padding: 28px 24px;
            backdrop-filter: blur(10px);
        }
        .kpi-number {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .kpi-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 8px;
        }
        .faq-item {
            border: 1px solid #e2e8f0;
            border-radius: 14px;
            background: #fff;
            padding: 0;
            overflow: hidden;
            transition: all 0.2s ease;
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            color: #1e293b;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 13px;
            color: #0e7c96;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: #64748b;
            font-size: 14px;
            line-height: 1.7;
        }
        .cta-section {
            background: linear-gradient(135deg, #052e38 0%, #095062 50%, #0e7c96 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(62, 189, 147, 0.15);
            filter: blur(60px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: #052e38;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: 12px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            background: #f1f5f9;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-weight: 500;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: 12px;
            transition: all 0.25s ease;
            background: rgba(255, 255, 255, 0.05);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.5);
        }
        .category-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(14, 124, 150, 0.08);
            color: #0b657c;
            border: 1px solid rgba(14, 124, 150, 0.15);
        }
        .cover-img {
            border-radius: 12px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cover-card:hover .cover-img {
            transform: scale(1.03);
        }
        @media (max-width: 768px) {
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
            .kpi-number {
                font-size: 32px;
            }
            .mobile-menu-open .mobile-nav {
                transform: translateX(0);
                opacity: 1;
            }
        }
        .mobile-nav {
            transform: translateX(100%);
            opacity: 0;
            transition: all 0.3s ease;
        }

/* roulang page: category3 */
:root {
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --color-primary: #0071c5;
    --color-primary-dark: #064e86;
    --color-accent: #0d9488;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-card: 0 1px 3px rgba(16,32,48,.06), 0 8px 28px rgba(16,32,48,.08);
    --shadow-card-hover: 0 4px 12px rgba(16,32,48,.10), 0 18px 44px rgba(16,32,48,.14);
  }
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a {
    text-decoration: none;
    color: inherit;
  }
  img {
    max-width: 100%;
    display: block;
  }
  button,
  input,
  select,
  textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
  }
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: 700;
    line-height: 1.25;
  }
  .nav-link {
    position: relative;
    padding: .45rem .9rem;
    font-size: .875rem;
    font-weight: 500;
    color: #94a3b8;
    border-radius: .55rem;
    transition: color .2s ease, background-color .2s ease;
  }
  .nav-link:hover {
    color: #e2e8f0;
    background-color: rgba(148, 163, 184, .08);
  }
  .nav-link.active {
    color: #ffffff;
    background-color: rgba(255, 255, 255, .10);
  }
  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 3px;
    border-radius: 99px;
    background: #2dd4bf;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .65rem 1.4rem;
    font-size: .875rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #0071c5, #0a4270);
    border-radius: .65rem;
    border: none;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, opacity .2s ease;
    box-shadow: 0 2px 8px rgba(7, 67, 120, .25);
  }
  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(7, 67, 120, .30);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-primary:focus-visible {
    outline: 3px solid rgba(45, 212, 191, .5);
    outline-offset: 2px;
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .65rem 1.4rem;
    font-size: .875rem;
    font-weight: 600;
    color: #14b8a6;
    background: transparent;
    border: 1.5px solid rgba(20, 184, 166, .45);
    border-radius: .65rem;
    cursor: pointer;
    transition: all .2s ease;
  }
  .btn-outline:hover {
    border-color: #14b8a6;
    background: rgba(20, 184, 166, .08);
  }
  .btn-outline:focus-visible {
    outline: 3px solid rgba(45, 212, 191, .45);
    outline-offset: 2px;
  }
  .card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  }
  .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: #cbd5e1;
  }
  .badge {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .25rem .75rem;
    font-size: .75rem;
    font-weight: 600;
    border-radius: 999px;
    line-height: 1.4;
  }
  .footer-heading {
    font-size: .875rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 1rem;
  }
  .footer-link {
    display: block;
    font-size: .8125rem;
    color: #64748b;
    padding: .3rem 0;
    transition: color .2s ease, padding-left .2s ease;
  }
  .footer-link:hover {
    color: #94a3b8;
    padding-left: 2px;
  }
  .event-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    transition: transform .3s ease, box-shadow .3s ease;
  }
  .event-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
  }
  .event-card .event-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .event-card:hover .event-img {
    transform: scale(1.04);
  }
  .stat-card {
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1rem;
    padding: 1.75rem 1rem;
    text-align: center;
    transition: background .3s ease, border-color .3s ease;
  }
  .stat-card:hover {
    background: rgba(255, 255, 255, .08);
    border-color: rgba(45, 212, 191, .3);
  }
  .faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
    transition: border-color .2s ease, box-shadow .2s ease;
  }
  .faq-item:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-card);
  }
  .timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #14b8a6;
    border: 3px solid rgba(20, 184, 166, .2);
    position: absolute;
    left: -23px;
    top: 6px;
  }
  .timeline-line::before {
    content: '';
    position: absolute;
    left: -17px;
    top: 10px;
    bottom: -10px;
    width: 2px;
    background: #e2e8f0;
  }
  .timeline-item:last-child .timeline-line::before {
    display: none;
  }
  @media (max-width: 640px) {
    .event-card .event-img {
      height: 150px;
    }
    .stat-card {
      padding: 1.25rem .75rem;
    }
  }

.mobile-nav-link {
    display: block;
    padding: .8rem .5rem;
    font-size: .9375rem;
    font-weight: 500;
    color: #94a3b8;
    border-bottom: 1px solid rgba(255, 255, 255, .04);
    transition: color .2s ease;
  }
  .mobile-nav-link:hover {
    color: #fff;
  }
  .mobile-nav-link-active {
    display: block;
    padding: .8rem .5rem;
    font-size: .9375rem;
    font-weight: 600;
    color: #2dd4bf;
    border-bottom: 1px solid rgba(255, 255, 255, .04);
  }