/* roulang page: index */
:root {
  --primary: #0d2a4d;
  --primary-2: #1a3f6e;
  --accent: #f2b43d;
  --accent-2: #ef8f1d;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #1e2433;
  --ink-soft: #5d6a82;
  --ink-light: #8b97ad;
  --line: #e5e9f2;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-lg: 0 24px 60px rgba(13, 42, 77, 0.12);
  --shadow-md: 0 12px 32px rgba(13, 42, 77, 0.08);
  --shadow-sm: 0 4px 14px rgba(13, 42, 77, 0.06);
  --tr: 0.25s cubic-bezier(0.2, 0.7, 0.3, 1);
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
.container { width: min(1200px, 92%); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.section { padding: 92px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(242, 180, 61, 0.14);
  color: #b77a0a;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  color: var(--primary);
  margin-bottom: 14px;
}
.section-sub { color: var(--ink-soft); font-size: clamp(15px, 2vw, 17px); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--tr);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1f2500;
  box-shadow: 0 8px 24px rgba(239, 143, 29, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(239, 143, 29, 0.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
  transform: translateY(-3px);
}
.btn-ghost {
  background: #fff;
  color: var(--primary);
  border-color: #e4e8f2;
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.btn:focus-visible,
.nav-link:focus-visible,
.post-link:focus-visible,
.nav-toggle:focus-visible,
.search-box input:focus-visible,
.logo:focus-visible {
  outline: 3px solid rgba(242, 180, 61, 0.5);
  outline-offset: 2px;
}

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 76px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(13, 42, 77, 0.2);
}
.brand-mark svg {
  width: 20px;
  height: 20px;
  fill: var(--accent);
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.01em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
}
.nav-link {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-soft);
  transition: var(--tr);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(13, 42, 77, 0.05);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(13, 42, 77, 0.08);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.search-box {
  display: flex;
  align-items: center;
  width: 210px;
  height: 40px;
  background: #f1f3f8;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0 6px 0 16px;
  transition: var(--tr);
}
.search-box:focus-within {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(242, 180, 61, 0.15);
  width: 230px;
}
.search-box input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--ink);
}
.search-box input::placeholder { color: var(--ink-light); }
.search-box button {
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--tr);
}
.search-box button:hover { background: rgba(13, 42, 77, 0.08); }
.search-box button svg { width: 15px; height: 15px; fill: var(--ink-soft); }
.btn-login {
  padding: 10px 22px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: var(--tr);
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--tr);
}

/* Hero */
.hero {
  position: relative;
  background:
    linear-gradient(115deg, rgba(8, 25, 48, 0.94) 20%, rgba(13, 42, 77, 0.78) 60%, rgba(20, 60, 100, 0.7)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 140px 0;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(242, 180, 61, 0.18);
  border: 1px solid rgba(242, 180, 61, 0.4);
  border-radius: 999px;
  color: #f8ce7b;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 28px;
  backdrop-filter: blur(4px);
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(242, 180, 61, 0.8);
}
.hero h1 {
  font-size: clamp(34px, 5.5vw, 60px);
  font-weight: 800;
  letter-spacing: 0.01em;
  margin-bottom: 22px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.hero h1 .hl {
  background: linear-gradient(120deg, #f8ce7b, #f2a93c);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  font-size: clamp(15px, 2vw, 18px);
  color: rgba(255, 255, 255, 0.85);
  max-width: 650px;
  margin-bottom: 36px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.hero-meta { margin-top: 50px; display: flex; flex-wrap: wrap; gap: 18px; }
.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.08);
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.hero-meta-item svg { width: 15px; height: 15px; fill: var(--accent); }

/* 图文简介 */
.intro-wrap {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 56px;
  align-items: center;
}
.intro-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.intro-media img { width: 100%; height: 100%; object-fit: cover; }
.intro-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, transparent 60%, rgba(13, 42, 77, 0.4));
}
.intro-card {
  position: absolute;
  left: 20px;
  bottom: 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.intro-card .ic-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(242, 180, 61, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
.intro-content h2 { margin-bottom: 18px; }
.intro-content p {
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.intro-points {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.intro-point {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--ink-soft);
  transition: var(--tr);
}
.intro-point:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.intro-point svg { width: 18px; height: 18px; fill: var(--accent); flex-shrink: 0; margin-top: 4px; }
.intro-point strong { display: block; color: var(--primary); font-size: 15px; margin-bottom: 2px; }

/* 特点四卡 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: var(--tr);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: var(--tr);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.feature-card:hover::before { opacity: 1; }
.fc-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(13, 42, 77, 0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.fc-icon svg { width: 24px; height: 24px; fill: var(--primary); }
.fc-icon.tone-accent { background: rgba(242, 180, 61, 0.14); }
.fc-icon.tone-accent svg { fill: #c87e08; }
.feature-card h3 { font-size: 18px; margin-bottom: 10px; color: var(--primary); }
.feature-card p { font-size: 14px; color: var(--ink-soft); }

/* 分类入口 */
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-md);
  transition: var(--tr);
  display: flex;
  flex-direction: column;
}
.category-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.cc-media { position: relative; height: 260px; overflow: hidden; }
.cc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .cc-media img { transform: scale(1.05); }
.cc-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 42, 77, 0.55), transparent 60%);
}
.cc-body {
  padding: 30px 28px 34px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.cc-body .cc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.cc-tag {
  padding: 4px 12px;
  background: rgba(13, 42, 77, 0.06);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 600;
}
.category-card h3 { font-size: 24px; color: var(--primary); margin-bottom: 8px; }
.category-card p { color: var(--ink-soft); font-size: 15px; margin-bottom: 22px; flex: 1; }
.cc-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
  transition: var(--tr);
}
.cc-more svg { width: 16px; height: 16px; fill: var(--primary); transition: var(--tr); }
.category-card:hover .cc-more { color: var(--accent-2); }
.category-card:hover .cc-more svg { fill: var(--accent-2); transform: translateX(4px); }

/* 最新资讯 */
.latest-section { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.latest-list { max-width: 900px; margin: 0 auto; }
.post-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 12px;
  border-bottom: 1px solid var(--line);
  transition: var(--tr);
  border-radius: var(--radius-md);
}
.post-item:last-child { border-bottom: none; }
.post-item:hover { background: rgba(245, 247, 251, 0.8); padding-left: 22px; }
.post-cat {
  flex-shrink: 0;
  min-width: 104px;
  text-align: center;
  padding: 6px 14px;
  background: rgba(13, 42, 77, 0.07);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}
.post-main { flex: 1; min-width: 0; }
.post-title { font-size: 17px; margin-bottom: 4px; }
.post-title a { transition: var(--tr); color: var(--ink); }
.post-title a:hover { color: var(--accent-2); }
.post-excerpt {
  font-size: 14px;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.post-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
  font-size: 13px;
  color: var(--ink-light);
}
.post-time { display: inline-flex; align-items: center; gap: 6px; }
.post-time svg { width: 14px; height: 14px; fill: var(--ink-light); }
.post-link {
  color: var(--primary);
  font-weight: 600;
  transition: var(--tr);
  white-space: nowrap;
}
.post-link:hover { color: var(--accent-2); }
.empty-tip {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-soft);
  background: #fafbfd;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--line);
  font-size: 15px;
}

/* 数据条 */
.stats-band {
  background: var(--primary);
  background-image:
    radial-gradient(circle at 15% 50%, rgba(242, 180, 61, 0.18), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.08), transparent 40%);
  padding: 70px 0;
  color: #fff;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.stat-item .num {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.stat-item .label { font-size: 14px; color: rgba(255, 255, 255, 0.75); margin-top: 8px; }

/* 流程 */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  position: relative;
  transition: var(--tr);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #262b00;
  font-weight: 800;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(239, 143, 29, 0.28);
}
.step-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--ink-soft); }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--tr);
}
.faq-item:hover { border-color: var(--accent); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  list-style: none;
  transition: var(--tr);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(13, 42, 77, 0.06);
  color: var(--primary);
  font-size: 20px;
  font-weight: 600;
  flex-shrink: 0;
  transition: var(--tr);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(242, 180, 61, 0.2);
  color: #b77a0a;
}
.faq-body { padding: 0 24px 22px; color: var(--ink-soft); font-size: 15px; line-height: 1.85; }

/* CTA */
.cta-section {
  position: relative;
  background:
    linear-gradient(125deg, rgba(242, 180, 61, 0.95), rgba(239, 143, 29, 0.94)),
    url('/assets/images/backpic/back-3.png') center/cover;
  color: #241c00;
  padding: 84px 0;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.06);
}
.cta-inner { position: relative; z-index: 2; }
.cta-inner h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; margin-bottom: 14px; }
.cta-inner p { font-size: 16px; margin-bottom: 28px; color: rgba(36, 28, 0, 0.8); }
.cta-inner .btn { background: var(--primary); color: #fff; border: none; box-shadow: 0 10px 28px rgba(13, 42, 77, 0.35); }
.cta-inner .btn:hover { transform: translateY(-3px); background: var(--primary-2); }

/* 页脚 */
.site-footer { background: #0a1d35; color: rgba(255, 255, 255, 0.7); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 56px; padding-bottom: 50px; }
.footer-brand .brand-name { color: #fff; font-size: 22px; }
.footer-brand .brand-mark { margin-bottom: 16px; }
.footer-about { font-size: 14px; line-height: 1.85; margin-top: 12px; max-width: 360px; }
.footer-heading { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.66); transition: var(--tr); }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.48);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* 响应式 */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-wrap { grid-template-columns: 1fr; gap: 32px; }
  .search-box { display: none; }
  .site-nav { gap: 4px; }
  .nav-link { padding: 8px 12px; font-size: 14px; }
  .header-bar { gap: 14px; }
  .brand-name { font-size: 17px; }
  .stats-grid { gap: 20px; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .header-bar { flex-wrap: wrap; min-height: 64px; }
  .brand { flex: 1; }
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 4%;
    right: 4%;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  .site-header.nav-open .site-nav { display: flex; }
  .site-header.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-header.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .site-header.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-link { padding: 14px 16px; border-radius: var(--radius-sm); }
  .btn-login { padding: 8px 16px; font-size: 13px; }
  .hero { padding: 90px 0; }
  .hero-meta { flex-direction: column; align-items: flex-start; }
  .category-grid { grid-template-columns: 1fr; }
  .cc-media { height: 220px; }
  .post-item { flex-direction: column; align-items: flex-start; gap: 10px; }
  .post-meta { width: 100%; justify-content: space-between; }
  .post-item:hover { padding-left: 12px; }
  .intro-points { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; justify-content: center; text-align: center; }
}
@media (max-width: 520px) {
  .brand-name { font-size: 16px; }
  .brand-mark { width: 32px; height: 32px; }
  .btn { padding: 12px 22px; font-size: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 26px; }
  .hero h1 { font-size: 30px; }
  .cc-body { padding: 24px 20px; }
  .post-cat { min-width: 80px; font-size: 12px; padding: 4px 10px; }
  .empty-tip { padding: 40px 16px; font-size: 14px; }
}

/* roulang page: category1 */
:root {
        --primary: #0d2c54;
        --primary-2: #103d6d;
        --accent: #f6b93b;
        --accent-dark: #e0a52e;
        --cyan: #26c6da;
        --bg: #f4f7fc;
        --bg-dark: #081a2e;
        --card: #ffffff;
        --text: #16283f;
        --muted: #5d6f87;
        --border: #e3e9f2;
        --radius: 14px;
        --radius-lg: 22px;
        --shadow-sm: 0 4px 16px rgba(13, 44, 84, .06);
        --shadow: 0 10px 32px rgba(13, 44, 84, .09);
        --shadow-lg: 0 20px 50px rgba(13, 44, 84, .14);
        --container: 1200px;
        --space: 72px;
        --space-sm: 48px;
        --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

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

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

    body {
        font-family: var(--font);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 15px;
    }

    ul,
    ol {
        list-style: none;
    }

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

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

    button,
    input {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
        background: none;
    }

    button {
        cursor: pointer;
    }

    .container {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 28px;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, .92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 30px rgba(13, 44, 84, .05);
    }

    .header-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 20px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }

    .brand-mark {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--cyan));
        color: #fff;
        box-shadow: 0 4px 14px rgba(13, 44, 84, .25);
    }

    .brand-mark svg {
        width: 20px;
        height: 20px;
        fill: currentColor;
    }

    .brand-name {
        font-size: 18px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: .5px;
        white-space: nowrap;
    }

    .site-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
        justify-content: center;
        padding: 0 12px;
    }

    .nav-link {
        padding: 8px 18px;
        border-radius: 999px;
        font-size: 15px;
        font-weight: 600;
        color: var(--muted);
        transition: all .25s ease;
        white-space: nowrap;
    }

    .nav-link:hover {
        color: var(--primary);
        background: rgba(38, 198, 218, .08);
    }

    .nav-link.active {
        color: #fff;
        background: var(--primary);
        box-shadow: 0 6px 16px rgba(13, 44, 84, .22);
    }

    .nav-link.active:hover {
        color: #fff;
    }

    .header-tools {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: 999px;
        padding: 6px 8px 6px 16px;
        transition: box-shadow .25s ease, border-color .25s ease;
        width: 220px;
    }

    .search-box:focus-within {
        border-color: var(--cyan);
        box-shadow: 0 0 0 3px rgba(38, 198, 218, .18);
        background: #fff;
    }

    .search-box input {
        width: 100%;
        background: transparent;
        font-size: 14px;
        color: var(--text);
    }

    .search-box input::placeholder {
        color: #9aa8bc;
    }

    .search-box button {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        transition: background .25s ease, transform .25s ease;
        flex-shrink: 0;
    }

    .search-box button:hover {
        background: var(--accent);
        transform: scale(1.05);
    }

    .search-box button svg {
        width: 16px;
        height: 16px;
        fill: currentColor;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 999px;
        font-weight: 700;
        font-size: 14px;
        padding: 10px 22px;
        transition: all .25s ease;
        white-space: nowrap;
        border: 2px solid transparent;
    }

    .btn-primary {
        background: var(--accent);
        color: var(--primary);
        box-shadow: 0 6px 18px rgba(246, 185, 59, .35);
    }

    .btn-primary:hover {
        background: var(--accent-dark);
        transform: translateY(-2px);
        box-shadow: 0 10px 24px rgba(246, 185, 59, .45);
    }

    .btn-primary:active {
        transform: translateY(0);
    }

    .btn-ghost {
        background: transparent;
        color: #fff;
        border-color: rgba(255, 255, 255, .7);
    }

    .btn-ghost:hover {
        background: rgba(255, 255, 255, .14);
        border-color: #fff;
    }

    .btn-lg {
        padding: 14px 36px;
        font-size: 16px;
    }

    .btn-login {
        padding: 9px 20px;
        font-size: 13px;
        background: var(--primary);
        color: #fff;
        box-shadow: none;
    }

    .btn-login:hover {
        background: var(--primary-2);
        box-shadow: 0 8px 20px rgba(13, 44, 84, .2);
        transform: translateY(-2px);
    }

    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 42px;
        height: 42px;
        padding: 8px;
        border-radius: 12px;
        background: var(--bg);
        border: 1px solid var(--border);
    }

    .nav-toggle span {
        height: 2px;
        width: 100%;
        background: var(--primary);
        border-radius: 2px;
        transition: all .3s ease;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .category-hero {
        position: relative;
        padding: 78px 0 68px;
        background: linear-gradient(110deg, rgba(8, 26, 46, .94) 0%, rgba(16, 61, 109, .82) 55%, rgba(38, 198, 218, .6) 100%), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
        color: #fff;
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: rgba(255, 255, 255, .72);
        margin-bottom: 18px;
    }

    .breadcrumb a {
        transition: color .25s ease;
    }

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

    .breadcrumb svg {
        width: 13px;
        height: 13px;
        fill: rgba(255, 255, 255, .5);
    }

    .category-hero h1 {
        font-size: 40px;
        font-weight: 900;
        line-height: 1.25;
        margin-bottom: 14px;
        letter-spacing: 1px;
    }

    .category-hero .hero-desc {
        font-size: 17px;
        max-width: 620px;
        color: rgba(255, 255, 255, .88);
        line-height: 1.8;
    }

    .hero-metrics {
        display: flex;
        flex-wrap: wrap;
        gap: 28px;
        margin-top: 34px;
    }

    .hero-metric {
        background: rgba(255, 255, 255, .12);
        border-radius: 14px;
        padding: 14px 22px;
        border: 1px solid rgba(255, 255, 255, .18);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .hero-metric strong {
        display: block;
        font-size: 26px;
        font-weight: 900;
        color: var(--accent);
        line-height: 1.2;
    }

    .hero-metric span {
        font-size: 13px;
        color: rgba(255, 255, 255, .78);
    }

    .channel-tabs {
        padding: 34px 0 10px;
        position: relative;
        z-index: 2;
        margin-top: -22px;
    }

    .tabs-wrap {
        background: var(--card);
        border-radius: 20px;
        box-shadow: var(--shadow);
        padding: 18px 20px;
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        border: 1px solid var(--border);
    }

    .tab-pill {
        padding: 8px 20px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        background: var(--bg);
        color: var(--muted);
        transition: all .25s ease;
        border: 1px solid transparent;
    }

    .tab-pill:hover {
        color: var(--primary);
        border-color: var(--cyan);
        background: rgba(38, 198, 218, .08);
    }

    .tab-pill.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 6px 16px rgba(13, 44, 84, .2);
    }

    .section {
        padding: var(--space) 0;
    }

    .section-head {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 24px;
        margin-bottom: 36px;
        flex-wrap: wrap;
    }

    .section-head h2 {
        font-size: 28px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.3;
        position: relative;
    }

    .section-head h2::after {
        content: '';
        display: block;
        width: 52px;
        height: 4px;
        border-radius: 4px;
        background: linear-gradient(90deg, var(--accent), var(--cyan));
        margin-top: 10px;
    }

    .section-head p {
        color: var(--muted);
        max-width: 520px;
        font-size: 14px;
    }

    .section-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border-bottom: 2px solid var(--cyan);
        padding-bottom: 4px;
        transition: color .25s ease;
    }

    .section-link:hover {
        color: var(--cyan);
    }

    .feature-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .feature-card {
        background: var(--card);
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: transform .35s ease, box-shadow .35s ease;
        display: flex;
        flex-direction: column;
    }

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

    .feature-media {
        position: relative;
        height: 172px;
        overflow: hidden;
    }

    .feature-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s ease;
    }

    .feature-card:hover .feature-media img {
        transform: scale(1.06);
    }

    .feature-media::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 40%, rgba(8, 26, 46, .55));
    }

    .feature-pill {
        position: absolute;
        top: 14px;
        left: 14px;
        z-index: 2;
        background: var(--accent);
        color: var(--primary);
        font-size: 12px;
        font-weight: 800;
        padding: 5px 14px;
        border-radius: 999px;
        box-shadow: 0 4px 12px rgba(246, 185, 59, .4);
    }

    .feature-body {
        padding: 22px 20px 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .feature-body h3 {
        font-size: 17px;
        font-weight: 700;
        line-height: 1.45;
        color: var(--text);
        margin-bottom: 10px;
        transition: color .25s ease;
    }

    .feature-card:hover .feature-body h3 {
        color: var(--primary);
    }

    .feature-body p {
        font-size: 13px;
        color: var(--muted);
        line-height: 1.7;
        margin-bottom: 16px;
        flex: 1;
    }

    .feature-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 12px;
        color: #93a1b5;
        border-top: 1px solid var(--border);
        padding-top: 14px;
    }

    .feature-meta span {
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }

    .latest-section {
        background: #edf2f9;
    }

    .latest-wrap {
        display: grid;
        grid-template-columns: 1fr 340px;
        gap: 34px;
        align-items: start;
    }

    .news-list {
        background: var(--card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
    }

    .news-item {
        display: flex;
        gap: 18px;
        padding: 20px 22px;
        border-bottom: 1px solid var(--border);
        transition: background .25s ease;
    }

    .news-item:last-child {
        border-bottom: none;
    }

    .news-item:hover {
        background: #f8fbff;
    }

    .news-thumb {
        width: 120px;
        height: 82px;
        flex-shrink: 0;
        border-radius: 12px;
        overflow: hidden;
        position: relative;
    }

    .news-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }

    .news-item:hover .news-thumb img {
        transform: scale(1.07);
    }

    .news-content {
        flex: 1;
        min-width: 0;
    }

    .news-tag {
        display: inline-block;
        font-size: 11px;
        font-weight: 800;
        color: var(--primary);
        background: rgba(38, 198, 218, .12);
        padding: 3px 10px;
        border-radius: 999px;
        margin-bottom: 7px;
    }

    .news-title {
        font-size: 16px;
        font-weight: 700;
        line-height: 1.5;
        color: var(--text);
        margin-bottom: 6px;
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: color .25s ease;
    }

    .news-item:hover .news-title {
        color: var(--primary);
    }

    .news-excerpt {
        font-size: 13px;
        color: var(--muted);
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 8px;
    }

    .news-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 12px;
        color: #93a1b5;
    }

    .news-meta svg {
        width: 13px;
        height: 13px;
        fill: currentColor;
    }

    .side-card {
        background: var(--card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        padding: 26px 22px;
        margin-bottom: 24px;
    }

    .side-card h3 {
        font-size: 18px;
        font-weight: 800;
        color: var(--primary);
        margin-bottom: 18px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .side-card h3::before {
        content: '';
        width: 4px;
        height: 18px;
        background: var(--accent);
        border-radius: 4px;
    }

    .rank-list {
        counter-reset: rank;
    }

    .rank-item {
        counter-increment: rank;
        display: flex;
        gap: 12px;
        padding: 10px 0;
        border-bottom: 1px dashed var(--border);
        align-items: flex-start;
    }

    .rank-item:last-child {
        border-bottom: none;
    }

    .rank-item::before {
        content: counter(rank, decimal-leading-zero);
        font-size: 18px;
        font-weight: 900;
        color: var(--accent);
        font-style: italic;
        line-height: 1.2;
        min-width: 26px;
    }

    .rank-item a {
        font-size: 14px;
        font-weight: 600;
        color: var(--text);
        line-height: 1.55;
        transition: color .25s ease;
    }

    .rank-item a:hover {
        color: var(--cyan);
    }

    .side-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .side-tag {
        padding: 6px 14px;
        border-radius: 999px;
        background: var(--bg);
        border: 1px solid var(--border);
        font-size: 12px;
        font-weight: 600;
        color: var(--muted);
        transition: all .25s ease;
    }

    .side-tag:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }

    .stats-band {
        position: relative;
        padding: 70px 0;
        background: linear-gradient(120deg, rgba(8, 26, 46, .95), rgba(16, 61, 109, .88)), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
        color: #fff;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }

    .stat-card {
        text-align: center;
        padding: 28px 20px;
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .16);
        border-radius: 20px;
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
        transition: transform .3s ease, background .3s ease;
    }

    .stat-card:hover {
        transform: translateY(-4px);
        background: rgba(255, 255, 255, .12);
    }

    .stat-num {
        font-size: 34px;
        font-weight: 900;
        color: var(--accent);
        line-height: 1.2;
    }

    .stat-label {
        font-size: 14px;
        color: rgba(255, 255, 255, .82);
        margin-top: 6px;
    }

    .faq-section {
        background: var(--card);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    .faq-layout {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .faq-item {
        border: 1px solid var(--border);
        border-radius: var(--radius);
        background: var(--bg);
        overflow: hidden;
        transition: box-shadow .25s ease, border-color .25s ease;
    }

    .faq-item:hover {
        border-color: var(--cyan);
        box-shadow: var(--shadow-sm);
    }

    .faq-item details {
        padding: 20px 22px;
    }

    .faq-item summary {
        font-size: 15px;
        font-weight: 700;
        color: var(--primary);
        cursor: pointer;
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
    }

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

    .faq-item summary::after {
        content: '+';
        font-size: 24px;
        color: var(--accent);
        font-weight: 400;
        line-height: 1;
        transition: transform .3s ease;
    }

    .faq-item details[open] summary::after {
        transform: rotate(45deg);
    }

    .faq-item details p {
        margin-top: 12px;
        font-size: 14px;
        color: var(--muted);
        line-height: 1.75;
    }

    .cta-banner {
        padding: var(--space) 0;
    }

    .cta-box {
        position: relative;
        background: linear-gradient(120deg, var(--primary) 0%, var(--primary-2) 60%, #115e8f 100%);
        border-radius: 28px;
        padding: 56px 52px;
        color: #fff;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        box-shadow: var(--shadow-lg);
    }

    .cta-box::before {
        content: '';
        position: absolute;
        right: -60px;
        top: -60px;
        width: 240px;
        height: 240px;
        background: rgba(246, 185, 59, .18);
        border-radius: 50%;
    }

    .cta-box::after {
        content: '';
        position: absolute;
        right: 60px;
        bottom: -100px;
        width: 200px;
        height: 200px;
        background: rgba(38, 198, 218, .18);
        border-radius: 50%;
    }

    .cta-text {
        position: relative;
        z-index: 2;
    }

    .cta-text h2 {
        font-size: 26px;
        font-weight: 800;
        margin-bottom: 10px;
    }

    .cta-text p {
        color: rgba(255, 255, 255, .82);
        max-width: 480px;
        font-size: 14px;
    }

    .cta-actions {
        display: flex;
        gap: 12px;
        position: relative;
        z-index: 2;
        flex-shrink: 0;
    }

    .site-footer {
        background: var(--bg-dark);
        color: #9fb0c4;
        padding: 64px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
    }

    .footer-brand .brand-name {
        color: #fff;
        font-size: 17px;
    }

    .footer-about {
        font-size: 14px;
        line-height: 1.8;
        margin-top: 18px;
        max-width: 360px;
        color: #8b9bb0;
    }

    .footer-heading {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 18px;
        position: relative;
        padding-bottom: 10px;
    }

    .footer-heading::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 28px;
        height: 3px;
        background: var(--accent);
        border-radius: 3px;
    }

    .footer-links li {
        margin-bottom: 10px;
    }

    .footer-links a {
        font-size: 14px;
        color: #8b9bb0;
        transition: color .25s ease, padding-left .25s ease;
    }

    .footer-links a:hover {
        color: var(--accent);
        padding-left: 4px;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 10px;
        padding: 20px 0 24px;
        font-size: 13px;
        color: #6b7d94;
    }

    .footer-bottom a {
        color: #8aa0b8;
        transition: color .25s ease;
    }

    .footer-bottom a:hover {
        color: var(--accent);
    }

    @media (max-width: 1024px) {
        .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .latest-wrap {
            grid-template-columns: 1fr;
        }

        .faq-layout {
            grid-template-columns: 1fr;
        }

        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .search-box {
            width: 170px;
        }
    }

    @media (max-width: 768px) {
        :root {
            --space: 52px;
            --space-sm: 36px;
        }

        .site-nav {
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            flex-direction: column;
            align-items: stretch;
            padding: 20px 28px;
            box-shadow: 0 20px 40px rgba(13, 44, 84, .12);
            transform: translateY(-120%);
            transition: transform .35s ease;
            border-bottom: 1px solid var(--border);
            z-index: 99;
            display: flex;
        }

        .site-nav.open {
            transform: translateY(0);
        }

        .nav-toggle {
            display: flex;
        }

        .search-box {
            display: none;
        }

        .btn-login {
            padding: 8px 16px;
            font-size: 13px;
        }

        .category-hero {
            padding: 56px 0 54px;
        }

        .category-hero h1 {
            font-size: 30px;
        }

        .hero-metrics {
            gap: 14px;
        }

        .hero-metric {
            padding: 10px 16px;
        }

        .hero-metric strong {
            font-size: 22px;
        }

        .cta-box {
            flex-direction: column;
            padding: 40px 28px;
            text-align: center;
        }

        .cta-actions {
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 18px;
        }

        .brand-name {
            font-size: 15px;
        }

        .brand-mark {
            width: 32px;
            height: 32px;
        }

        .feature-grid {
            grid-template-columns: 1fr;
        }

        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .stat-card {
            padding: 20px 12px;
        }

        .stat-num {
            font-size: 26px;
        }

        .news-item {
            flex-direction: column;
            gap: 12px;
        }

        .news-thumb {
            width: 100%;
            height: 140px;
        }

        .news-meta {
            flex-wrap: wrap;
            gap: 8px;
        }

        .section-head {
            align-items: flex-start;
        }

        .section-head h2 {
            font-size: 23px;
        }

        .cta-text h2 {
            font-size: 21px;
        }

        .footer-bottom {
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
    }

    @media (max-width: 360px) {
        .category-hero h1 {
            font-size: 26px;
        }

        .hero-metric span {
            font-size: 11px;
        }
    }

    :focus-visible {
        outline: 3px solid rgba(38, 198, 218, .55);
        outline-offset: 2px;
        border-radius: 4px;
    }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1a2a6c;
  --primary-light: #2d4a9e;
  --primary-dark: #0f1a42;
  --accent: #e9a13b;
  --accent-light: #f4c877;
  --accent-dark: #c9851f;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #eef1f8;
  --text: #1e2338;
  --text-light: #5b6278;
  --text-muted: #8c92a8;
  --border: #e3e7f0;
  --border-light: #eef1f7;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 10px rgba(26, 42, 108, 0.06);
  --shadow-md: 0 6px 28px rgba(26, 42, 108, 0.09);
  --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
  --shadow-accent: 0 6px 24px rgba(233, 161, 59, 0.32);
  --container: 1200px;
  --space-section: 96px;
  --space-block: 56px;
  --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

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

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

a:hover {
  color: var(--primary-light);
}

ul, ol {
  list-style: none;
}

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

input, textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 3px solid rgba(233, 161, 59, 0.55);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* ========== 头部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 18px rgba(26, 42, 108, 0.05);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  box-shadow: 0 4px 14px rgba(26, 42, 108, 0.28);
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand-mark svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.brand:hover .brand-mark {
  transform: translateY(-2px) rotate(-3deg);
  box-shadow: 0 8px 22px rgba(26, 42, 108, 0.36);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(120deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.site-nav .nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.site-nav .nav-link:hover {
  color: var(--primary);
  background: rgba(26, 42, 108, 0.06);
}

.site-nav .nav-link.active {
  color: var(--primary);
  background: rgba(26, 42, 108, 0.09);
  font-weight: 600;
}

.site-nav .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 3px;
  border-radius: 4px;
  background: var(--accent);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--surface-alt);
  border-radius: 999px;
  padding: 3px 4px 3px 16px;
  border: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 4px 18px rgba(233, 161, 59, 0.18);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--text);
  width: 150px;
  transition: width var(--transition);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  width: 180px;
}

.search-box button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  transition: background var(--transition), transform var(--transition);
}

.search-box button:hover {
  background: var(--primary-light);
  transform: scale(1.06);
}

.search-box button svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(26, 42, 108, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(26, 42, 108, 0.38);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 3px 10px rgba(26, 42, 108, 0.24);
}

.btn-outline {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--primary-dark);
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(233, 161, 59, 0.42);
  color: var(--primary-dark);
}

.btn-login {
  padding: 9px 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border-radius: 10px;
}

.nav-toggle span {
  width: 22px;
  height: 2.5px;
  border-radius: 4px;
  background: var(--text);
  transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.4);
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ========== 页面横幅 ========== */
.page-banner {
  position: relative;
  padding: 100px 0 80px;
  background: linear-gradient(120deg, rgba(26, 42, 108, 0.96) 0%, rgba(45, 74, 158, 0.92) 45%, rgba(26, 42, 108, 0.98) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #ffffff;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -10%;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 161, 59, 0.24), transparent 65%);
  pointer-events: none;
}

.page-banner::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  border: 54px solid rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.banner-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.banner-crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 22px;
  background: rgba(255, 255, 255, 0.1);
  padding: 7px 18px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.banner-crumb a {
  color: rgba(255, 255, 255, 0.85);
}

.banner-crumb a:hover {
  color: var(--accent);
}

.banner-crumb .sep {
  opacity: 0.5;
}

.banner-inner h1 {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 0.01em;
}

.banner-inner h1 span {
  color: var(--accent-light);
  position: relative;
  display: inline-block;
}

.banner-inner p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin-bottom: 30px;
}

.banner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.banner-tags .tag {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  border-radius: 999px;
  padding: 6px 16px;
  backdrop-filter: blur(6px);
  transition: all var(--transition);
}

.banner-tags .tag:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
}

/* ========== 内容区域 ========== */
.section {
  padding: var(--space-section) 0;
}

.section-alt {
  background: var(--surface);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}

.section-header .tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(233, 161, 59, 0.13);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.section-header h2 {
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

.section-header p.desc {
  margin-top: 10px;
  color: var(--text-light);
  font-size: 15px;
  max-width: 680px;
}

.section-header .link-more {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  transition: all var(--transition);
}

.section-header .link-more:hover {
  border-color: var(--primary);
  background: rgba(26, 42, 108, 0.06);
  gap: 10px;
}

/* ========== 卡片网格 ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card-item {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

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

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

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

.card-media .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.14);
}

.card-body {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
}

.card-body .card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.card-body .card-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.card-body h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  transition: color var(--transition);
}

.card-body h3 a {
  color: inherit;
}

.card-body h3 a:hover {
  color: var(--primary);
}

.card-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  margin-top: 4px;
}

.card-footer .read-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.card-footer .read-more:hover {
  gap: 9px;
}

.card-footer .read-more svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.card-footer .views {
  font-size: 12px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* ========== 热门专题 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.feature-block {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 380px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-block:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-block img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  transition: transform 0.5s ease;
}

.feature-block:hover img {
  transform: scale(1.04);
}

.feature-block::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.35) 45%, rgba(15, 23, 42, 0.05) 100%);
  z-index: 1;
}

.feature-content {
  position: relative;
  z-index: 2;
  padding: 34px 30px;
  color: #fff;
}

.feature-content .feature-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--accent);
  color: var(--primary-dark);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.feature-content h3 {
  font-size: 23px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 10px;
}

.feature-content p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.7;
  margin-bottom: 18px;
}

.feature-content .btn {
  padding: 8px 22px;
  font-size: 14px;
}

/* ========== 数据统计 ========== */
.stats-section {
  background: linear-gradient(130deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: var(--radius-xl);
  padding: 54px 48px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.stats-section::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 50px solid rgba(255, 255, 255, 0.06);
}

.stats-section::after {
  content: "";
  position: absolute;
  bottom: -50px;
  left: 20%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(233, 161, 59, 0.16);
  filter: blur(30px);
}

.stats-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.stat-item {
  text-align: center;
  padding: 12px;
}

.stat-item .number {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--accent-light);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-item .number small {
  font-size: 18px;
  font-weight: 600;
  margin-left: 2px;
}

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

/* ========== 分类标签 ========== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.topic-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.topic-card:hover::before {
  transform: scaleX(1);
}

.topic-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26, 42, 108, 0.2);
}

.topic-card .topic-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(26, 42, 108, 0.08), rgba(45, 74, 158, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  transition: all var(--transition);
}

.topic-card:hover .topic-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  transform: scale(1.08);
}

.topic-card .topic-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--primary);
  transition: fill var(--transition);
}

.topic-card:hover .topic-icon svg {
  fill: #ffffff;
}

.topic-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.topic-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========== 图文列表 ========== */
.list-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.list-item {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 18px;
  transition: all var(--transition);
}

.list-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(26, 42, 108, 0.18);
  transform: translateX(4px);
}

.list-item .thumbnail {
  width: 120px;
  height: 84px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
}

.list-item .list-content {
  flex: 1;
  min-width: 0;
}

.list-item .list-content .tag-line {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  color: var(--accent-dark);
  background: rgba(233, 161, 59, 0.14);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
  font-weight: 600;
}

.list-item .list-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 3px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item .list-content h3 a {
  color: var(--text);
}

.list-item .list-content h3 a:hover {
  color: var(--primary);
}

.list-item .list-content p {
  font-size: 13px;
  color: var(--text-light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item .list-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* ========== FAQ ========== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:hover {
  border-color: rgba(26, 42, 108, 0.2);
}

.faq-item.open {
  box-shadow: var(--shadow-sm);
  border-color: rgba(26, 42, 108, 0.2);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}

.faq-question h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(26, 42, 108, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}

.faq-icon svg {
  width: 15px;
  height: 15px;
  fill: var(--primary);
  transition: transform 0.35s ease;
}

.faq-item.open .faq-icon {
  background: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ========== CTA ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: var(--radius-xl);
  padding: 70px 56px;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  left: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(233, 161, 59, 0.2);
  filter: blur(40px);
}

.cta-section::after {
  content: "";
  position: absolute;
  bottom: -70px;
  right: -30px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  border: 44px solid rgba(255, 255, 255, 0.05);
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  margin-bottom: 14px;
}

.cta-inner p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 28px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.cta-actions .btn-accent {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.16);
}

.cta-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}

.cta-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.82);
  padding: 72px 0 30px;
  margin-top: 100px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 48px;
}

.footer-grid .brand .brand-name {
  background: none;
  -webkit-text-fill-color: #ffffff;
  color: #ffffff;
  font-size: 20px;
}

.footer-grid .brand .brand-mark {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
}

.footer-grid .brand .brand-mark svg {
  fill: var(--primary-dark);
}

.footer-about {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.62);
  margin-top: 20px;
  max-width: 360px;
}

.footer-heading {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2.5px;
  border-radius: 4px;
  background: var(--accent);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-links a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--accent);
  transition: all var(--transition);
}

.footer-links a:hover {
  color: var(--accent-light);
  transform: translateX(4px);
}

.footer-links a:hover::before {
  background: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
  color: var(--accent-light);
}

/* ========== 响应式断点 ========== */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }

  .header-bar {
    gap: 20px;
  }

  .search-box input {
    width: 110px;
  }

  .search-box input:focus {
    width: 140px;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-grid {
    gap: 36px;
  }
}

@media (max-width: 800px) {
  .header-bar {
    height: auto;
    flex-wrap: wrap;
    padding: 14px 0;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
    order: 3;
  }

  .header-tools {
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0;
  }

  .site-nav.open {
    max-height: 300px;
    padding: 12px 0 4px;
  }

  .site-nav .nav-link {
    border-radius: 12px;
    padding: 12px 16px;
  }

  .site-nav .nav-link.active::after {
    display: none;
  }

  .search-box {
    display: none;
  }

  .btn-login {
    display: none;
  }

  .page-banner {
    padding: 70px 0 56px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .list-item .thumbnail {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .list-meta {
    align-self: flex-end;
  }

  .stats-section {
    padding: 40px 24px;
  }

  .cta-section {
    padding: 50px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  :root {
    --space-section: 56px;
  }

  .container {
    padding: 0 16px;
  }

  .header-bar {
    padding: 12px 0;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .brand-mark svg {
    width: 18px;
    height: 18px;
  }

  .brand-name {
    font-size: 17px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-item .number {
    font-size: 32px;
  }

  .feature-content {
    padding: 24px 20px;
  }

  .feature-content h3 {
    font-size: 19px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .faq-question h3 {
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
  --primary: #0d3f66;
  --primary-600: #125080;
  --primary-700: #0a2e4d;
  --accent: #f4a51b;
  --accent-600: #dd8e0a;
  --teal: #17b3a3;
  --bg-body: #f5f8fc;
  --bg-soft: #eaf1f9;
  --bg-deep: #0b2338;
  --card: #ffffff;
  --text: #152238;
  --text-soft: #5a6b81;
  --text-faint: #8fa0b5;
  --border: #e4ebf3;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 26px;
  --shadow-1: 0 2px 10px rgba(13,63,102,.06);
  --shadow-2: 0 12px 30px rgba(13,63,102,.10);
  --shadow-3: 0 22px 50px rgba(13,63,102,.16);
  --font: "PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --trans: .25s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.75; color: var(--text); background: var(--bg-body); }
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: color var(--trans); }
button, input { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(244,165,27,.4); outline-offset: 2px; border-radius: 6px; }
.container { width: min(1200px, 92%); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.header-bar { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: max-content; }
.brand-mark { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-600)); color: #fff; box-shadow: var(--shadow-1); }
.brand-mark svg { width: 20px; height: 20px; fill: currentColor; }
.brand-name { font-size: 19px; font-weight: 800; letter-spacing: .3px; color: var(--text); white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { display: inline-flex; align-items: center; padding: 9px 16px; border-radius: 999px; font-size: 15px; font-weight: 600; color: var(--text-soft); transition: color var(--trans), background var(--trans); }
.nav-link:hover { color: var(--primary); background: var(--bg-soft); }
.nav-link.active { color: #fff; background: var(--primary); }
.header-tools { display: flex; align-items: center; gap: 12px; }
.search-box { display: flex; align-items: center; background: var(--bg-soft); border: 1px solid transparent; border-radius: 999px; padding: 2px 4px 2px 16px; transition: border-color var(--trans), box-shadow var(--trans); }
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,63,102,.12); background: #fff; }
.search-box input { border: none; background: transparent; outline: none; font-size: 14px; min-width: 170px; padding: 7px 0; color: var(--text); }
.search-box button { border: none; background: var(--primary); color: #fff; width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background var(--trans), transform var(--trans); }
.search-box button:hover { background: var(--primary-600); transform: scale(1.04); }
.search-box svg { width: 16px; height: 16px; fill: currentColor; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; padding: 10px 20px; font-size: 15px; font-weight: 700; border: 2px solid transparent; cursor: pointer; transition: all var(--trans); }
.btn-primary { background: linear-gradient(135deg, var(--accent), #f7bd50); color: #152238; box-shadow: 0 8px 18px rgba(244,165,27,.28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(244,165,27,.36); }
.btn-login { padding: 9px 22px; font-size: 14px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: transparent; border: 1px solid var(--border); border-radius: 10px; width: 42px; height: 42px; align-items: center; justify-content: center; cursor: pointer; }
.nav-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--trans); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.article-hero { position: relative; padding: 72px 0 64px; background-size: cover; background-position: center; color: #fff; }
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(6,22,38,.92), rgba(13,63,102,.78) 55%, rgba(23,179,163,.55)); }
.article-hero .container { position: relative; z-index: 2; }
.crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; color: rgba(255,255,255,.78); margin-bottom: 18px; }
.crumb a:hover { color: #fff; }
.crumb-sep { color: rgba(255,255,255,.5); }
.crumb span { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-cat-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.25); color: #fff; padding: 6px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; backdrop-filter: blur(8px); margin-bottom: 16px; }
.article-hero h1 { font-size: clamp(26px, 4vw, 42px); line-height: 1.35; font-weight: 800; max-width: 860px; margin: 0 0 18px; letter-spacing: .5px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; color: rgba(255,255,255,.82); }
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.article-section { padding: 54px 0 30px; }
.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 340px; gap: 36px; align-items: start; }
.article-main { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 38px 42px; box-shadow: var(--shadow-1); }
.article-abstract { background: var(--bg-soft); border-left: 4px solid var(--accent); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-soft); font-size: 15.5px; line-height: 1.8; margin-bottom: 28px; }
.article-content { font-size: 16.5px; line-height: 2; color: var(--text); }
.article-content p { margin: 0 0 1.5em; }
.article-content h2 { font-size: 25px; margin: 2em 0 .8em; line-height: 1.4; padding-left: 14px; border-left: 4px solid var(--accent); }
.article-content h3 { font-size: 20px; margin: 1.8em 0 .7em; }
.article-content img { border-radius: var(--radius); box-shadow: var(--shadow-1); }
.article-content blockquote { margin: 1.6em 0; padding: 16px 20px; background: var(--bg-soft); border-left: 4px solid var(--primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-soft); }
.article-content ul, .article-content ol { margin: 0 0 1.5em; padding-left: 1.4em; }
.article-content li { margin-bottom: .6em; }
.article-content a { color: var(--primary-600); text-decoration: underline; text-underline-offset: 3px; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.6em 0; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content table th { background: var(--bg-soft); font-weight: 700; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--border); }
.tag { display: inline-flex; align-items: center; gap: 5px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font-size: 13px; color: var(--text-soft); transition: all var(--trans); }
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

.article-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 92px; }
.sidebar-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-1); }
.sidebar-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.sidebar-card-head h3 { font-size: 17px; margin: 0; font-weight: 800; }
.sidebar-card-head a { font-size: 13px; color: var(--primary-600); font-weight: 600; }
.sidebar-card-head a:hover { color: var(--accent-600); }
.latest-list { list-style: none; padding: 0; margin: 0; }
.latest-list li { border-bottom: 1px dashed var(--border); }
.latest-list li:last-child { border-bottom: none; }
.latest-list a { display: flex; align-items: center; gap: 12px; padding: 13px 0; font-size: 14.5px; color: var(--text); transition: color var(--trans); }
.latest-list a:hover { color: var(--primary-600); }
.latest-date { flex: none; font-size: 12px; color: var(--text-faint); background: var(--bg-soft); padding: 3px 9px; border-radius: 999px; }
.latest-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-guide { list-style: none; padding: 0; margin: 0; }
.cat-guide li { margin-bottom: 10px; }
.cat-guide a { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--bg-soft); color: var(--text); font-weight: 600; font-size: 14.5px; transition: all var(--trans); }
.cat-guide a:hover { background: var(--primary); color: #fff; transform: translateX(3px); }
.cat-guide svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.help-card { background: linear-gradient(145deg, var(--primary), var(--primary-700)); color: #fff; border: none; position: relative; overflow: hidden; }
.help-card::after { content: ""; position: absolute; right: -30px; top: -30px; width: 120px; height: 120px; border-radius: 50%; background: rgba(255,255,255,.08); }
.help-card h4 { margin: 0 0 8px; font-size: 17px; }
.help-card p { margin: 0 0 18px; color: rgba(255,255,255,.82); font-size: 14px; }
.help-card .btn { width: 100%; }

.related-section { padding: 46px 0 20px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 28px; }
.section-head.center { flex-direction: column; align-items: center; text-align: center; }
.section-head .eyebrow { display: inline-flex; align-items: center; gap: 8px; background: rgba(244,165,27,.12); color: var(--accent-600); font-size: 12.5px; font-weight: 700; letter-spacing: 1.5px; padding: 6px 14px; border-radius: 999px; margin-bottom: 12px; width: max-content; }
.section-head h2 { font-size: clamp(22px, 3vw, 30px); line-height: 1.4; margin: 0; font-weight: 800; }
.section-head p { color: var(--text-soft); margin: 8px 0 0; font-size: 14.5px; max-width: 640px; }
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.related-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-1); transition: transform var(--trans), box-shadow var(--trans); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-2); }
.related-media { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.related-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.related-card:hover .related-media img { transform: scale(1.05); }
.related-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(8,28,48,.65)); }
.related-media .related-badge { position: absolute; left: 14px; top: 14px; z-index: 2; background: rgba(255,255,255,.92); color: var(--primary); font-size: 12.5px; font-weight: 700; padding: 5px 12px; border-radius: 999px; }
.related-body { padding: 20px 22px 24px; }
.related-body h3 { margin: 0 0 8px; font-size: 17px; line-height: 1.55; }
.related-body h3 a:hover { color: var(--primary-600); }
.related-body p { margin: 0; color: var(--text-soft); font-size: 13.5px; line-height: 1.8; }

.feature-section { padding: 50px 0; }
.feature-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.feature-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; text-align: center; transition: all var(--trans); }
.feature-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-2); }
.feature-icon { width: 58px; height: 58px; margin: 0 auto 16px; border-radius: 16px; display: flex; align-items: center; justify-content: center; background: var(--bg-soft); color: var(--primary); }
.feature-icon.s2 { background: #e9faf7; color: var(--teal); }
.feature-icon.s3 { background: #fdf3e3; color: var(--accent-600); }
.feature-icon.s4 { background: #eef3fd; color: #4f7df2; }
.feature-icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-item h3 { font-size: 16.5px; margin: 0 0 6px; }
.feature-item p { margin: 0; font-size: 13.5px; color: var(--text-soft); }

.faq-section { padding: 30px 0 60px; }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-1); }
.faq-item summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 18px 22px; font-size: 16px; font-weight: 700; transition: background var(--trans); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--bg-soft); }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--primary-600); font-weight: 400; transition: transform var(--trans); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body { padding: 0 22px 18px; color: var(--text-soft); font-size: 14.5px; line-height: 1.9; }
.faq-body p { margin: 0 0 10px; }
.faq-body p:last-child { margin-bottom: 0; }

.cta-section { padding: 20px 0 80px; }
.cta-inner { position: relative; background-size: cover; background-position: center; border-radius: var(--radius-lg); overflow: hidden; padding: 58px 50px; color: #fff; text-align: center; }
.cta-inner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(8,30,52,.95), rgba(13,63,102,.82) 55%, rgba(8,88,91,.78)); }
.cta-inner .container { position: relative; z-index: 2; }
.cta-inner h2 { font-size: clamp(24px,3.4vw,34px); margin: 0 0 12px; }
.cta-inner p { color: rgba(255,255,255,.85); max-width: 720px; margin: 0 auto 26px; font-size: 15.5px; }
.cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }
.cta-actions .btn-white { background: #fff; color: var(--primary); padding: 12px 26px; }
.cta-actions .btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0,0,0,.2); }
.cta-actions .btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.4); padding: 12px 26px; backdrop-filter: blur(8px); }
.cta-actions .btn-ghost:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); }

.not-found { text-align: center; padding: 50px 20px; }
.not-found .nf-code { font-size: 54px; font-weight: 800; color: var(--primary); }
.not-found h2 { font-size: 24px; margin: 6px 0 10px; }
.not-found p { color: var(--text-soft); }
.not-found .btn { margin-top: 18px; }

.site-footer { background: var(--bg-deep); color: rgba(255,255,255,.72); padding: 58px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding-bottom: 38px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand .brand-name { color: #fff; }
.footer-about { font-size: 14px; line-height: 1.9; max-width: 380px; margin: 0; color: rgba(255,255,255,.6); }
.footer-heading { color: #fff; font-size: 16px; margin: 0 0 16px; letter-spacing: .5px; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 11px; }
.footer-links a { color: rgba(255,255,255,.6); font-size: 14.5px; transition: color var(--trans); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; display: flex; align-items: center; justify-content: space-between; gap: 14px; font-size: 13.5px; color: rgba(255,255,255,.5); flex-wrap: wrap; }
.footer-bottom a { color: rgba(255,255,255,.7); }
.footer-bottom a:hover { color: var(--accent); }

@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; order: 2; display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; }
  .help-card { grid-column: span 2; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
  .feature-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 900px) {
  .search-box input { min-width: 0; width: 130px; }
}
@media (max-width: 768px) {
  .header-bar { height: 62px; }
  .site-nav { position: fixed; top: 62px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 12px 16px 18px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-2); transform: translateY(-130%); transition: transform .3s ease; z-index: 100; border-radius: 0 0 18px 18px; }
  .site-nav.open { transform: translateY(0); }
  .nav-link { justify-content: center; padding: 12px 16px; border-radius: 12px; }
  .nav-toggle { display: flex; }
  .search-box { display: none; }
  .article-main { padding: 24px 20px; }
  .article-hero { padding: 44px 0 42px; }
  .article-sidebar { display: grid; grid-template-columns: 1fr; }
  .help-card { grid-column: auto; }
  .related-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .cta-inner { padding: 40px 22px; }
}
@media (max-width: 520px) {
  .header-tools .btn-login { padding: 8px 14px; font-size: 13px; }
  .brand-name { font-size: 16px; }
  .brand-mark { width: 34px; height: 34px; }
  .feature-grid { grid-template-columns: 1fr; }
  .article-meta { gap: 10px 16px; }
  .article-content { font-size: 15.5px; }
  .article-tags { gap: 8px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}