/* roulang page: index */
:root {
  --primary: #1668C9;
  --primary-dark: #0E4F9E;
  --primary-light: #EAF2FC;
  --accent: #FF8A1E;
  --accent-hover: #E67700;
  --success: #12B76A;
  --success-light: #E8F8F0;
  --text: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --bg-alt: #F1F5F9;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16,24,40,0.06), 0 4px 12px rgba(16,24,40,0.06);
  --shadow-hover: 0 8px 24px rgba(16,24,40,0.10);
  --container: 1200px;
  --header-h: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); text-decoration: underline; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 40px; gap: 16px; flex-wrap: wrap;
}
.section-header h2 {
  font-size: 28px; font-weight: 700; line-height: 1.3; color: var(--text);
  position: relative;
}
.section-header h2::before {
  content: ''; display: inline-block; width: 4px; height: 24px;
  background: var(--primary); border-radius: 2px; margin-right: 12px;
  vertical-align: -4px;
}
.text-link { font-size: 15px; font-weight: 500; color: var(--primary); }
.text-link:hover { color: var(--primary-dark); text-decoration: underline; }

/* 按钮体系 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 600; line-height: 1.5;
  border: 1px solid transparent; cursor: pointer;
  transition: all .2s ease; text-decoration: none; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 6px rgba(22,104,201,.30); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(22,104,201,.35); text-decoration: none; }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 4px rgba(22,104,201,.25); }
.btn-secondary { background: #fff; border-color: #CBD5E1; color: var(--primary); }
.btn-secondary:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary-dark); transform: translateY(-1px); text-decoration: none; }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 2px 6px rgba(255,138,30,.30); }
.btn-accent:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(255,138,30,.35); text-decoration: none; }
.btn-lg { padding: 14px 36px; font-size: 16px; border-radius: 10px; }
.btn-block { width: 100%; }

/* 标签 / 徽章 */
.category-badge {
  display: inline-flex; align-items: center; padding: 4px 10px;
  background: var(--primary-light); color: var(--primary);
  border-radius: 999px; font-size: 12px; font-weight: 500; line-height: 1.6;
}
.hot-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  background: var(--accent); color: #fff; font-size: 11px; font-weight: 600;
  padding: 3px 10px; border-radius: 999px; line-height: 1.5;
}
.done-badge { background: var(--success-light); color: var(--success); font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.doing-badge { background: var(--primary); color: #fff; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.todo-badge { background: var(--bg-alt); color: var(--text-muted); font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }

/* Header 导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff; border-bottom: 1px solid var(--border);
  transition: box-shadow .2s ease;
}
.site-header.scrolled { box-shadow: 0 4px 12px rgba(16,24,40,.06); }
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.brand:hover { text-decoration: none; }
.brand-icon {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
}
.brand-name {
  font-size: 22px; font-weight: 800; color: var(--primary);
  letter-spacing: .5px; line-height: 1.2;
}
.nav-menu { display: flex; align-items: center; gap: 28px; flex: 1; justify-content: center; }
.nav-menu a {
  font-size: 15px; font-weight: 500; color: var(--text);
  padding: 6px 2px; position: relative; text-decoration: none;
  transition: color .2s ease;
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a.active { color: var(--primary); font-weight: 600; }
.nav-menu a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-actions .btn { padding: 9px 20px; font-size: 15px; }
.menu-toggle {
  display: none; width: 40px; height: 40px; border-radius: 8px;
  align-items: center; justify-content: center; font-size: 20px;
  color: var(--text); background: var(--bg); flex-shrink: 0;
}
.menu-toggle:hover { background: var(--bg-alt); }

/* Hero 首屏 */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #EAF2FC 0%, #F8FAFC 60%, #fff 100%);
  min-height: 680px; display: flex; align-items: center;
  padding: 60px 0 80px;
}
.hero-bg-layer {
  position: absolute; top: 0; right: 0; width: 52%; height: 100%;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover; background-position: center;
  border-radius: 0 0 0 48px;
}
.hero-bg-layer::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(270deg, rgba(232,242,252,.85) 0%, rgba(255,255,255,.3) 100%);
}
.hero-deco {
  position: absolute; top: 90px; right: 12%;
  width: 300px; height: 300px; border-radius: 50%;
  border: 3px solid rgba(22,104,201,.12); z-index: 0;
}
.hero-deco::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 140px; height: 140px; border-radius: 50%;
  background: rgba(255,138,30,.08); transform: translate(-50%,-50%);
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 60px; align-items: center;
}
.hero-content { max-width: 580px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.7); border: 1px solid rgba(22,104,201,.18);
  color: var(--primary); font-size: 13px; font-weight: 500;
  padding: 5px 14px; border-radius: 999px; margin-bottom: 20px;
  backdrop-filter: blur(4px);
}
.hero-content h1 {
  font-size: 40px; font-weight: 800; line-height: 1.2;
  letter-spacing: -0.5px; color: var(--text);
  margin-bottom: 20px;
}
.hero-content h1 span { color: var(--primary); }
.hero-subtitle {
  font-size: 17px; line-height: 1.8; color: var(--text-secondary);
  margin-bottom: 36px; max-width: 520px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual {
  position: relative; border-radius: var(--radius);
  box-shadow: var(--shadow-hover); overflow: hidden;
}
.hero-visual img {
  width: 100%; height: 480px; object-fit: cover; border-radius: var(--radius);
}
.hero-card {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-radius: var(--radius); padding: 16px 20px;
  box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px;
}
.hero-card-label {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--primary-light); color: var(--primary);
  font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  flex-shrink: 0;
}
.hero-card strong {
  font-size: 15px; color: var(--text); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; flex: 1;
}
.hero-card-time { font-size: 13px; color: var(--text-muted); flex-shrink: 0; }
.scroll-indicator {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  font-size: 24px; color: var(--text-muted); opacity: .6;
  animation: floatDown 2s ease-in-out infinite; z-index: 2;
}
@keyframes floatDown {
  0%,100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* 数据条带 */
.stats-strip { background: #fff; border-bottom: 1px solid var(--border); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding: 40px 0;
}
.stat-item {
  border-left: 3px solid var(--primary);
  padding: 4px 0 4px 20px;
}
.stat-number {
  font-size: 36px; font-weight: 800; color: var(--text);
  line-height: 1.2; letter-spacing: -0.5px;
}
.stat-number em { font-style: normal; color: var(--primary); }
.stat-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

/* 玩法介绍 */
.features-section { background: #fff; }
.feature-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: center; margin-bottom: 80px;
}
.feature-block:last-child { margin-bottom: 0; }
.feature-block.reverse .feature-img { order: 2; }
.feature-block.reverse .feature-text { order: 1; }
.feature-img {
  border-radius: 16px; overflow: hidden; box-shadow: var(--shadow);
  position: relative;
}
.feature-img img {
  width: 100%; height: 320px; object-fit: cover; border-radius: 16px;
  transition: transform .5s ease;
}
.feature-img:hover img { transform: scale(1.03); }
.feature-text h2 {
  font-size: 28px; font-weight: 700; margin-bottom: 16px; line-height: 1.3;
}
.feature-text p {
  font-size: 16px; line-height: 1.8; color: var(--text-secondary);
  margin-bottom: 18px;
}
.feature-list { margin: 20px 0 24px; }
.feature-list li {
  position: relative; padding-left: 26px; margin-bottom: 10px;
  font-size: 15px; color: var(--text-secondary);
}
.feature-list li::before {
  content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
  position: absolute; left: 0; top: 1px;
  color: var(--success); font-size: 14px;
}
.feature-more { font-size: 15px; font-weight: 500; }

/* 奖励预览 */
.rewards-section { background: var(--bg); }
.rewards-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.reward-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); position: relative;
  transition: transform .25s ease, box-shadow .25s ease;
}
.reward-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.reward-card img {
  width: 100%; height: 200px; object-fit: cover;
}
.reward-info { padding: 20px; }
.reward-info h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.reward-info p { font-size: 14px; color: var(--text-muted); }
.reward-value {
  display: inline-block; margin-top: 12px;
  font-size: 13px; font-weight: 600; color: var(--accent);
  background: rgba(255,138,30,.08); padding: 3px 10px; border-radius: 999px;
}

/* 任务进度 */
.tasks-section { background: #fff; }
.task-panel {
  background: #fff; border-radius: 16px; border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 0;
  overflow: hidden;
}
.task-list { padding: 32px; border-right: 1px solid var(--border); }
.task-item { margin-bottom: 28px; }
.task-item:last-child { margin-bottom: 0; }
.task-item-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px; gap: 12px;
}
.task-name { font-size: 15px; font-weight: 600; color: var(--text); }
.task-progress {
  height: 7px; background: var(--border); border-radius: 999px;
  overflow: hidden; margin-bottom: 8px;
}
.task-progress span {
  display: block; height: 100%; border-radius: 999px;
  background: var(--primary); transition: width .6s ease;
}
.task-progress span.done { background: var(--success); }
.task-overview {
  padding: 32px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  background: var(--bg);
}
.progress-ring {
  width: 140px; height: 140px; border-radius: 50%;
  background: conic-gradient(var(--primary) 68%, var(--border) 0);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; position: relative;
}
.progress-ring span {
  display: flex; align-items: center; justify-content: center;
  width: 108px; height: 108px; background: #fff;
  border-radius: 50%; font-size: 26px; font-weight: 800;
  color: var(--primary); box-shadow: 0 2px 8px rgba(16,24,40,.06);
}
.task-overview p { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }

/* CTA 横条 */
.cta-banner {
  background: var(--primary);
  padding: 80px 0; text-align: center;
}
.cta-banner h2 {
  font-size: 32px; font-weight: 700; color: #fff;
  margin-bottom: 14px; letter-spacing: -0.5px;
}
.cta-banner p {
  font-size: 16px; color: rgba(255,255,255,.85);
  max-width: 480px; margin: 0 auto 32px; line-height: 1.7;
}
.cta-banner .btn-white {
  background: #fff; color: var(--primary); font-weight: 600;
  padding: 14px 36px; border-radius: 10px; font-size: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
  transition: all .2s ease; text-decoration: none; display: inline-flex;
  align-items: center; gap: 8px;
}
.cta-banner .btn-white:hover {
  background: var(--primary-light); transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.2); color: var(--primary-dark);
}
.cta-banner .btn-outline-white {
  background: transparent; border: 2px solid rgba(255,255,255,.6);
  color: #fff; font-weight: 600; padding: 12px 32px;
  border-radius: 10px; font-size: 16px; margin-left: 12px;
  transition: all .2s ease; text-decoration: none; display: inline-flex;
  align-items: center; gap: 8px;
}
.cta-banner .btn-outline-white:hover { border-color: #fff; background: rgba(255,255,255,.1); }

/* 最新资讯 */
.news-section { background: var(--bg); }
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow); overflow: hidden;
  display: grid; grid-template-columns: 240px 1fr; gap: 0;
  transition: transform .25s ease, box-shadow .25s ease;
}
.news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.news-thumb { position: relative; overflow: hidden; display: block; }
.news-thumb img {
  width: 100%; height: 100%; min-height: 160px; object-fit: cover;
  transition: transform .4s ease;
}
.news-item:hover .news-thumb img { transform: scale(1.03); }
.news-info { padding: 24px 28px; display: flex; flex-direction: column; justify-content: center; }
.news-meta {
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
}
.news-meta time { font-size: 13px; color: var(--text-muted); }
.news-title { font-size: 20px; font-weight: 600; line-height: 1.4; margin-bottom: 8px; }
.news-title a { color: var(--text); transition: color .2s ease; }
.news-title a:hover { color: var(--primary); text-decoration: none; }
.news-excerpt {
  font-size: 14px; color: var(--text-secondary); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  border: 1px dashed var(--border); border-radius: var(--radius);
  background: var(--bg); padding: 60px 20px; text-align: center;
  color: var(--text-muted); font-size: 14px;
}
.news-empty i { font-size: 32px; color: var(--border); margin-bottom: 12px; display: block; }
.news-loadmore { text-align: center; margin-top: 32px; }

/* FAQ */
.faq-section { background: #fff; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg); border: 1px solid transparent;
  border-radius: 12px; margin-bottom: 16px; overflow: hidden;
  transition: border-color .2s ease;
}
.faq-item.active { border-color: var(--primary); background: #fff; box-shadow: var(--shadow); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-size: 16px; font-weight: 600;
  color: var(--text); cursor: pointer; gap: 16px;
}
.faq-icon {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--primary); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; flex-shrink: 0; transition: all .2s ease;
}
.faq-item.active .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
}
.faq-item.active .faq-answer { max-height: 400px; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 15px; color: var(--text-secondary); line-height: 1.7; }

/* 页脚 */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); }
.footer-top {
  display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 48px;
  padding: 60px 0 40px;
}
.footer-brand .brand-name { font-size: 24px; }
.footer-brand p {
  font-size: 14px; color: var(--text-secondary);
  margin-top: 16px; line-height: 1.7; max-width: 320px;
}
.footer-col h4 {
  font-size: 14px; font-weight: 700; color: var(--text);
  margin-bottom: 16px; letter-spacing: .5px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 14px; color: #475569; transition: color .2s ease;
}
.footer-col ul a:hover { color: var(--primary); }
.footer-contact { font-size: 14px; color: #475569; line-height: 1.8; }
.footer-contact i { color: var(--primary); margin-right: 8px; width: 18px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0; text-align: center;
  font-size: 12px; color: var(--text-muted);
}

/* 返回顶部 */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 99;
  width: 46px; height: 46px; border-radius: 50%;
  background: #fff; border: 1px solid var(--border);
  box-shadow: var(--shadow); color: var(--primary);
  font-size: 18px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0; visibility: hidden;
  transition: all .3s ease;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 响应式 */
@media (max-width:1023px) {
  .nav-menu { gap: 18px; }
  .nav-menu a { font-size: 14px; }
  .hero-inner { gap: 36px; }
  .hero-content h1 { font-size: 34px; }
  .hero-visual img { height: 380px; }
  .feature-block { gap: 36px; }
  .rewards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width:767px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .section-header h2 { font-size: 22px; }
  .navbar { height: 56px; }
  .brand-name { font-size: 18px; }
  .brand-icon { width: 28px; height: 28px; font-size: 13px; }
  .nav-menu {
    display: none; position: absolute; top: 56px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 16px 24px;
    gap: 4px; border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(16,24,40,.08);
    align-items: stretch;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 8px; font-size: 16px; border-radius: 8px; }
  .nav-menu a:hover { background: var(--bg); }
  .nav-menu a.active::after { display: none; }
  .nav-menu a.active { background: var(--primary-light); }
  .nav-actions { display: none; }
  .nav-actions.open { display: flex; flex-direction: column; gap: 10px; padding: 0 16px 16px; background: #fff; }
  .menu-toggle { display: flex; }
  .hero { min-height: auto; padding: 48px 0 60px; }
  .hero-bg-layer { width: 100%; opacity: .25; border-radius: 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-content h1 { font-size: 30px; }
  .hero-visual img { height: 260px; }
  .hero-card { bottom: 12px; left: 12px; right: 12px; padding: 12px 14px; }
  .hero-card-time { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 24px 0; }
  .stat-number { font-size: 28px; }
  .feature-block { grid-template-columns: 1fr; gap: 24px; margin-bottom: 56px; }
  .feature-block.reverse .feature-img { order: 0; }
  .feature-block.reverse .feature-text { order: 0; }
  .feature-img img { height: 220px; }
  .feature-text h2 { font-size: 22px; }
  .rewards-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .reward-card img { height: 140px; }
  .reward-info { padding: 14px; }
  .task-panel { grid-template-columns: 1fr; }
  .task-list { padding: 20px; border-right: none; border-bottom: 1px solid var(--border); }
  .task-overview { padding: 28px 20px; }
  .cta-banner { padding: 48px 0; }
  .cta-banner h2 { font-size: 24px; }
  .cta-banner .btn-outline-white { margin-left: 0; margin-top: 12px; }
  .news-item { grid-template-columns: 1fr; }
  .news-thumb img { height: 180px; }
  .news-info { padding: 16px 18px; }
  .news-title { font-size: 17px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; padding: 40px 0 24px; }
  .btn-lg { padding: 12px 28px; font-size: 15px; }
  .back-to-top { bottom: 16px; right: 16px; }
}

/* roulang page: article */
:root {
  --primary: #1668C9;
  --primary-dark: #0E4F9E;
  --primary-light: #EAF2FC;
  --accent: #FF8A1E;
  --accent-dark: #E67700;
  --success: #12B76A;
  --text: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --bg-alt: #F1F5F9;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16,24,40,0.06), 0 4px 12px rgba(16,24,40,0.06);
  --shadow-hover: 0 8px 24px rgba(16,24,40,0.10);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 767px) { .container { padding: 0 16px; } }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  padding: 11px 24px;
  text-decoration: none;
  transition: all .25s ease;
  border: 1px solid transparent;
  cursor: pointer;
  outline: none;
}
.btn i { font-size: 14px; }
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(22,104,201,0.30);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(22,104,201,0.35);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 4px rgba(22,104,201,0.25); }
.btn-secondary {
  background: #fff;
  border-color: #CBD5E1;
  color: var(--primary);
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.btn-secondary:active { background: var(--primary-light); }

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 4px 16px rgba(16,24,40,0.08); }
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(22,104,201,0.30);
}
.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.3px;
  white-space: nowrap;
}
.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}
.nav-menu li { position: relative; }
.nav-menu a {
  display: block;
  padding: 8px 15px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 8px;
  transition: color .2s, background .2s;
  position: relative;
}
.nav-menu a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-menu a.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-light);
}
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 999px;
  background: var(--primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}
.menu-toggle:hover { background: var(--bg); }

/* Article Page */
.article-page {
  padding: 32px 0 72px;
  background: var(--bg);
  min-height: 65vh;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 18px;
  box-shadow: var(--shadow);
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color .2s;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep {
  color: var(--border);
  font-size: 12px;
}
.breadcrumb .current {
  color: var(--text);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 48px 56px;
  border-top: 4px solid var(--primary);
}
.article-header {
  text-align: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 28px;
  margin-bottom: 32px;
}
.article-header h1 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin: 0 0 18px;
  letter-spacing: -0.3px;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--text-secondary);
}
.article-meta i {
  color: var(--primary);
  margin-right: 4px;
}
.meta-cat {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.article-content {
  max-width: 780px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.85;
  color: #333D47;
  word-break: break-word;
}
.article-content p {
  margin: 0 0 18px;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 16px;
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 12px;
  line-height: 1.4;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 10px;
}
.article-content img {
  max-width: 100%;
  border-radius: 10px;
  display: block;
  margin: 24px auto;
  box-shadow: var(--shadow);
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg);
  padding: 18px 22px;
  margin: 24px 0;
  border-radius: 0 10px 10px 0;
  color: var(--text-secondary);
  font-size: 15px;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--primary-dark);
}
.article-content ul,
.article-content ol {
  padding-left: 22px;
  margin: 0 0 18px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.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);
  font-weight: 600;
}
.article-content code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 14px;
}
.article-empty {
  text-align: center;
  padding: 70px 20px 60px;
  color: var(--text-secondary);
}
.empty-icon {
  width: 74px;
  height: 74px;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  font-size: 26px;
  color: var(--text-muted);
}
.article-empty p {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 10px;
}
.article-empty .empty-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
  font-weight: 400;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 32px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}
.tag-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tag {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 5px 16px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-secondary);
  display: inline-block;
  transition: all .2s;
}
.tag:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 780px;
  margin: 24px auto 0;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.pager-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all .25s;
  box-shadow: var(--shadow);
}
.pager-link i {
  color: var(--primary);
  font-size: 13px;
  transition: transform .2s;
}
.pager-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}
.pager-prev:hover i { transform: translateX(-3px); }
.pager-next:hover i { transform: translateX(3px); }
.pager-next {
  justify-content: flex-end;
}

.related-section {
  margin-top: 44px;
}
.related-section h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  line-height: 1.3;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-decoration: none;
  display: block;
  transition: all .3s;
  border: 1px solid var(--border);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.related-cover {
  overflow: hidden;
  position: relative;
}
.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  border-radius: var(--radius) var(--radius) 0 0;
  transition: transform .35s ease;
}
.related-card:hover img { transform: scale(1.05); }
.related-card-body {
  padding: 20px;
}
.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 10px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 50px;
}
.related-date {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-cta {
  margin-top: 48px;
  background: var(--primary-light);
  border: 1px solid #D0E4FA;
  border-radius: var(--radius);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.article-cta p {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.article-cta p i {
  color: var(--accent);
  font-size: 24px;
}
.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 52px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: #475569;
  text-decoration: none;
  transition: color .2s, padding-left .2s;
}
.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-contact p {
  font-size: 14px;
  color: #475569;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.footer-contact i {
  color: var(--primary);
  width: 18px;
  margin-top: 4px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  background: #EDF1F5;
}

/* Back to top */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  cursor: pointer;
  z-index: 60;
  transition: all .3s;
  opacity: 0;
  visibility: hidden;
  font-size: 16px;
}
.back-top.show {
  opacity: 1;
  visibility: visible;
}
.back-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(22,104,201,0.30);
}

/* Desktop nav */
@media (min-width: 1024px) {
  .nav-menu { display: flex; }
  .nav-actions { display: flex; }
}

/* Tablet */
@media (min-width: 768px) and (max-width: 1023px) {
  .nav-menu {
    display: flex;
    gap: 2px;
  }
  .nav-menu a {
    padding: 7px 10px;
    font-size: 14px;
  }
  .nav-actions .btn {
    padding: 9px 16px;
    font-size: 14px;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .site-header {
    height: auto;
  }
  .navbar {
    display: flex;
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
    position: relative;
  }
  .brand {
    order: 1;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
    border-radius: 8px;
  }
  .brand-name {
    font-size: 19px;
  }
  .menu-toggle {
    order: 3;
    display: flex;
    margin-left: auto;
  }
  .nav-menu {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    padding: 12px 0 4px;
    gap: 2px;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-menu a {
    padding: 12px 14px;
    font-size: 15px;
    border-radius: 8px;
  }
  .nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: auto;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 18px;
    border-radius: 999px;
  }
  .nav-actions {
    display: none;
    order: 5;
    width: 100%;
    flex-direction: column;
    gap: 10px;
    padding: 10px 0 6px;
  }
  .nav-actions.open {
    display: flex;
  }
  .nav-actions .btn {
    width: 100%;
    padding: 12px 20px;
  }

  .article-page {
    padding: 18px 0 48px;
  }
  .breadcrumb {
    padding: 9px 14px;
    font-size: 13px;
    margin-bottom: 16px;
  }
  .breadcrumb .current {
    max-width: 180px;
  }
  .article-card {
    padding: 26px 20px;
    border-top-width: 3px;
  }
  .article-header {
    padding-bottom: 20px;
    margin-bottom: 24px;
  }
  .article-header h1 {
    font-size: 26px;
    line-height: 1.35;
  }
  .article-meta {
    gap: 10px;
    font-size: 13px;
    flex-direction: column;
  }
  .article-content {
    font-size: 15px;
    line-height: 1.8;
  }
  .article-content h2 {
    font-size: 21px;
  }
  .article-content h3 {
    font-size: 18px;
  }
  .article-content blockquote {
    padding: 14px 16px;
  }
  .article-tags {
    margin-top: 24px;
    padding: 16px 0;
    max-width: 100%;
  }
  .article-pager {
    grid-template-columns: 1fr;
    gap: 10px;
    max-width: 100%;
  }
  .pager-link {
    padding: 14px 16px;
  }
  .pager-next {
    justify-content: flex-start;
  }
  .related-section {
    margin-top: 32px;
  }
  .related-section h2 {
    font-size: 22px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .related-card {
    display: flex;
    align-items: stretch;
  }
  .related-cover {
    width: 42%;
    flex-shrink: 0;
  }
  .related-card img {
    height: 100%;
    min-height: 120px;
    border-radius: var(--radius) 0 0 var(--radius);
    object-fit: cover;
  }
  .related-card-body {
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .related-card h3 {
    font-size: 15px;
    min-height: 0;
    -webkit-line-clamp: 3;
    margin-bottom: 8px;
  }
  .article-cta {
    margin-top: 32px;
    padding: 26px 20px;
    flex-direction: column;
    text-align: center;
  }
  .article-cta p {
    font-size: 16px;
    flex-direction: column;
    gap: 8px;
  }
  .cta-actions {
    width: 100%;
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .footer-brand p {
    max-width: 100%;
  }
  .back-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
    font-size: 14px;
  }
}
@media (max-width: 520px) {
  .brand-name {
    font-size: 18px;
  }
  .brand-icon {
    width: 30px;
    height: 30px;
  }
  .article-card {
    padding: 20px 16px;
  }
  .article-header h1 {
    font-size: 23px;
  }
  .related-card {
    display: block;
  }
  .related-cover {
    width: 100%;
  }
  .related-card img {
    width: 100%;
    height: 130px;
    border-radius: var(--radius) var(--radius) 0 0;
  }
  .related-card h3 {
    min-height: 0;
  }
}

/* roulang page: category1 */
:root {
            --primary: #1668c9;
            --primary-hover: #0e4f9e;
            --primary-light: #eaf2fc;
            --accent: #ff8a1e;
            --accent-hover: #e67700;
            --success: #12b76a;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --bg-page: #f8fafc;
            --bg-block: #f1f5f9;
            --white: #fff;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --shadow-card: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 12px rgba(16, 24, 40, .06);
            --shadow-hover: 0 8px 24px rgba(16, 24, 40, .10);
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            color: var(--text);
            background: var(--bg-page);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: var(--primary-hover);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section.bg-white {
            background: var(--white);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        .text-link {
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
        }
        .text-link:hover {
            color: var(--primary-hover);
        }
        .text-link i {
            transition: transform .2s;
        }
        .text-link:hover i {
            transform: translateX(4px);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: 1px solid transparent;
            transition: all .3s ease;
            cursor: pointer;
            text-decoration: none;
        }
        .btn:focus-visible,
        .menu-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 6px rgba(22, 104, 201, .30);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 4px 12px rgba(22, 104, 201, .35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0.5px);
        }
        .btn-secondary {
            background: var(--white);
            border-color: #cbd5e1;
            color: var(--primary);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            color: var(--primary);
        }
        .btn-lg {
            padding: 13px 34px;
            font-size: 16px;
        }
        .site-header {
            height: 72px;
            background: var(--white);
            border-bottom: 1px solid #e5eaef;
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow .3s;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(16, 24, 40, .08);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 9px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .brand-name {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-menu a {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            text-decoration: none;
            padding: 8px 2px;
            transition: color .2s;
        }
        .nav-menu a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            opacity: 0;
            transform: scaleX(0);
            transition: all .3s;
        }
        .nav-menu a:hover {
            color: var(--primary);
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-menu a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            font-size: 22px;
            color: var(--text);
            background: var(--bg-block);
            align-items: center;
            justify-content: center;
            transition: background .2s;
        }
        .menu-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .category-hero {
            background: linear-gradient(135deg, #eaf2fc 0%, #f8fafc 60%, #fff 100%);
            padding: 48px 0 88px;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            border: 48px solid rgba(22, 104, 201, .05);
        }
        .category-hero::after {
            content: "";
            position: absolute;
            left: 10%;
            bottom: -30px;
            width: 200px;
            height: 70px;
            background: rgba(255, 138, 30, .08);
            border-radius: 12px;
            transform: skewX(-15deg);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #cbd5e1;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        .category-hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            color: var(--text);
            margin-bottom: 12px;
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .data-section {
            margin-top: -48px;
            position: relative;
            z-index: 3;
            padding-top: 0;
        }
        .data-strip {
            background: var(--white);
            border-top: 3px solid var(--primary);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 24px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .data-item {
            text-align: center;
        }
        .data-num {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary);
        }
        .data-num span {
            color: var(--accent);
            font-size: 20px;
            font-weight: 700;
        }
        .data-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .feature-wrap {
            display: flex;
            flex-direction: column;
            gap: 56px;
        }
        .feature-block {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .feature-block.alternate {
            flex-direction: row-reverse;
        }
        .feature-media {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .feature-media img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform .4s;
        }
        .feature-media:hover img {
            transform: scale(1.03);
        }
        .feature-content {
            flex: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
        }
        .feature-content h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }
        .feature-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .feature-spectrum {
            background: var(--bg-block);
            border-radius: 16px;
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }
        .spectrum-info {
            flex: 1;
            min-width: 260px;
        }
        .spectrum-info h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .spectrum-info p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .spectrum-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 480px;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-tag);
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            transition: all .25s;
        }
        .chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-card);
        }
        .chip i {
            color: var(--accent);
        }
        .sport-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .sport-card {
            background: var(--white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all .3s;
            display: flex;
            flex-direction: column;
        }
        .sport-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .sport-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .sport-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s;
        }
        .sport-card:hover .sport-img img {
            transform: scale(1.03);
        }
        .sport-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .sport-tag {
            display: inline-block;
            align-self: flex-start;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            margin-bottom: 10px;
        }
        .sport-body h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
        }
        .sport-body h3 a {
            color: var(--text);
            text-decoration: none;
            transition: color .2s;
        }
        .sport-body h3 a:hover {
            color: var(--primary);
        }
        .sport-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 8px;
            flex: 1;
        }
        .sport-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }
        .scene-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .scene-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .scene-media img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .scene-list li {
            display: flex;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }
        .scene-list li:last-child {
            border-bottom: none;
        }
        .scene-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: transform .3s;
        }
        .scene-list li:hover .scene-icon {
            transform: scale(1.08);
        }
        .scene-text h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
        }
        .scene-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 4px;
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .flow-step {
            position: relative;
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 24px;
            text-align: center;
            transition: all .3s;
        }
        .flow-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .flow-step:not(:last-child)::after {
            content: "";
            position: absolute;
            top: 50%;
            right: -12px;
            width: 24px;
            height: 2px;
            background: var(--border);
        }
        .step-num {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 2px 8px rgba(22, 104, 201, .3);
        }
        .flow-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }
        .flow-step p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.7;
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-page);
            border: 1px solid transparent;
            border-radius: var(--radius-card);
            margin-bottom: 14px;
            transition: all .3s;
            overflow: hidden;
        }
        .faq-item.open {
            border-color: var(--primary);
            background: var(--white);
            box-shadow: var(--shadow-card);
        }
        .faq-q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
        }
        .faq-q .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-style: normal;
            transition: all .3s;
        }
        .faq-item.open .faq-q .icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-a p {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .category-cta {
            background: var(--primary-light);
            border: 2px solid var(--primary);
            border-radius: 18px;
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-cta::before {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .4);
        }
        .category-cta h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
        }
        .category-cta p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 10px auto 26px;
            max-width: 520px;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }
        .site-footer {
            background: var(--bg-block);
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 360px;
            margin-top: 10px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #475569;
            text-decoration: none;
            transition: color .2s;
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-contact p {
            font-size: 14px;
            color: #475569;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 18px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }
        .back-top {
            position: fixed;
            right: 24px;
            bottom: 32px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            color: var(--primary);
            font-size: 18px;
            display: none;
            align-items: center;
            justify-content: center;
            transition: all .3s;
            z-index: 99;
        }
        .back-top:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .back-top.show {
            display: flex;
        }
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 18px;
            }
            .nav-actions .btn {
                padding: 9px 16px;
                font-size: 14px;
            }
            .feature-block,
            .feature-block.alternate {
                gap: 36px;
            }
            .feature-media img {
                height: 240px;
            }
            .flow-steps {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 16px;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 56px;
            }
            .navbar {
                flex-wrap: wrap;
                gap: 0;
                padding: 0 16px;
            }
            .brand-name {
                font-size: 20px;
            }
            .menu-toggle {
                display: flex;
                margin-left: auto;
            }
            .nav-menu,
            .nav-actions {
                display: none;
                width: 100%;
                background: var(--white);
            }
            .nav-menu.open,
            .nav-actions.open {
                display: flex;
                flex-direction: column;
            }
            .nav-actions.open {
                order: -1;
                padding: 16px 0 4px;
                border-top: 1px solid var(--border);
                background: var(--bg-page);
            }
            .nav-actions.open .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-menu.open {
                order: 0;
                padding: 8px 0 16px;
                gap: 2px;
            }
            .nav-menu.open li {
                width: 100%;
            }
            .nav-menu.open a {
                display: block;
                padding: 10px 0;
                font-size: 15px;
                border-bottom: 1px solid var(--border);
            }
            .nav-menu.open a::after {
                display: none;
            }
            .category-hero {
                padding: 36px 0 76px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-btns .btn {
                width: 100%;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px 16px;
                padding: 24px 16px;
                margin-top: -32px;
            }
            .data-num {
                font-size: 26px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .feature-wrap {
                gap: 40px;
            }
            .feature-block,
            .feature-block.alternate {
                flex-direction: column;
                gap: 20px;
            }
            .feature-media img {
                height: 200px;
            }
            .feature-spectrum {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            .sport-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .sport-img {
                height: 180px;
            }
            .scene-wrap {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .scene-media img {
                height: 230px;
            }
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .flow-step:not(:last-child)::after {
                display: none;
            }
            .faq-q {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-a p {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .category-cta {
                padding: 36px 24px;
            }
            .category-cta h2 {
                font-size: 22px;
            }
            .cta-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-btns .btn {
                width: 100%;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .back-top {
                right: 16px;
                bottom: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .brand-name {
                font-size: 18px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .sport-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1668C9;
            --primary-hover: #0E4F9E;
            --primary-light: #EAF2FC;
            --accent: #FF8A1E;
            --accent-hover: #E67700;
            --success: #12B76A;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --text-mute: #94A3B8;
            --border: #E2E8F0;
            --bg-page: #F8FAFC;
            --bg-alt: #F1F5F9;
            --white: #FFFFFF;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 12px rgba(16, 24, 40, .06);
            --shadow-hover: 0 8px 24px rgba(16, 24, 40, .10);
            --container: 1200px;
            --header-h: 72px;
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-card);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-hover);
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: all .25s ease;
            text-decoration: none;
            cursor: pointer;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 6px rgba(22, 104, 201, .30);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(22, 104, 201, .35);
        }
        .btn-primary:active {
            transform: translateY(.5px);
            box-shadow: 0 1px 3px rgba(22, 104, 201, .25);
        }
        .btn-secondary {
            background: var(--white);
            border-color: #CBD5E1;
            color: var(--primary);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            color: var(--primary-hover);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 2px 6px rgba(255, 138, 30, .35);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(255, 138, 30, .40);
        }
        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, .8);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        /* ===== Badge / Tags ===== */
        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            line-height: 1.4;
        }
        .badge-hot {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            border-radius: 999px;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            line-height: 1.2;
            z-index: 2;
            box-shadow: 0 2px 6px rgba(255, 138, 30, .4);
        }
        .tag {
            display: inline-block;
            background: var(--bg-alt);
            color: var(--text-sub);
            border-radius: 999px;
            font-size: 12px;
            padding: 4px 12px;
            margin-right: 6px;
            margin-bottom: 6px;
            transition: all .2s ease;
        }
        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            display: flex;
            align-items: center;
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(16, 24, 40, .08);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            flex-shrink: 0;
        }
        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-size: 15px;
        }
        .brand-name {
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: 24px;
        }
        .nav-menu a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: color .2s ease, border-color .2s ease;
            text-decoration: none;
        }
        .nav-menu a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-menu a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
            flex-shrink: 0;
        }
        .nav-actions .btn {
            padding: 10px 22px;
            font-size: 15px;
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: var(--white);
            color: var(--text-main);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }
        .menu-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(120deg, rgba(234, 242, 252, .96) 0%, rgba(248, 250, 252, .88) 60%, rgba(255, 138, 30, .06) 100%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 84px 0 64px;
            border-bottom: 1px solid var(--border);
        }
        .page-hero .container {
            display: flex;
            align-items: center;
            min-height: 220px;
        }
        .hero-content {
            max-width: 680px;
        }
        .hero-content .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-mute);
            margin-bottom: 16px;
        }
        .hero-content .breadcrumb a {
            color: var(--text-sub);
        }
        .hero-content .breadcrumb a:hover {
            color: var(--primary);
        }
        .hero-content .breadcrumb i {
            font-size: 10px;
            color: var(--text-mute);
        }
        .hero-content h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -.5px;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .hero-content h1 span {
            color: var(--primary);
        }
        .hero-content p {
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        /* ===== Project Grid (2-col large cards) ===== */
        .project-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .project-card {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform .3s ease, box-shadow .3s ease;
            border: 1px solid var(--border);
        }
        .project-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .project-cover {
            position: relative;
            overflow: hidden;
            height: 220px;
            border-radius: 0;
        }
        .project-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
            border-radius: 0;
        }
        .project-card:hover .project-cover img {
            transform: scale(1.03);
        }
        .project-info {
            padding: 24px 24px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .project-info h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .project-info p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .project-info .link-more {
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease, gap .2s ease;
        }
        .project-info .link-more:hover {
            color: var(--primary-hover);
            gap: 10px;
        }
        /* ===== Stats Bar ===== */
        .stats-bar {
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 44px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 8px 16px;
            border-left: 3px solid var(--primary);
            text-align: left;
        }
        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            display: block;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 6px;
            display: block;
        }
        /* ===== Feature Block ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            margin-bottom: 80px;
        }
        .feature-block:last-child {
            margin-bottom: 0;
        }
        .feature-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
            border-radius: var(--radius-card);
        }
        .feature-content h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .feature-content p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .feature-content ul {
            margin-bottom: 24px;
        }
        .feature-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .feature-content ul li i {
            color: var(--success);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .feature-reverse .feature-media {
            order: 2;
        }
        .feature-reverse .feature-content {
            order: 1;
        }
        /* ===== Scene Cards ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }
        .scene-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--primary);
        }
        .scene-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 16px;
        }
        .scene-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .scene-card p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        .scene-card-wide {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            gap: 28px;
            padding: 32px 36px;
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .scene-card-wide .scene-icon {
            background: var(--primary);
            color: #fff;
            flex-shrink: 0;
        }
        .scene-card-wide h3 {
            font-size: 22px;
            margin-bottom: 4px;
        }
        .scene-card-wide p {
            margin-bottom: 0;
            flex: 1;
        }
        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            position: relative;
            transition: all .3s ease;
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 10px rgba(22, 104, 201, .25);
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }
        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-wrap .section-head {
            margin-bottom: 36px;
        }
        .faq-item {
            background: var(--bg-page);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            transition: border-color .3s ease;
            overflow: hidden;
        }
        .faq-item.open {
            border-color: var(--primary);
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            cursor: pointer;
            background: transparent;
            transition: background .2s ease;
        }
        .faq-q:hover {
            background: var(--primary-light);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: all .3s ease;
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-a {
            display: none;
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            display: block;
            animation: fadeIn .3s ease;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-4px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        /* ===== CTA Box ===== */
        .cta-box {
            padding: 64px 0 80px;
        }
        .cta-inner {
            background: var(--primary-light);
            border: 2px solid var(--primary);
            border-radius: 20px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(22, 104, 201, .06);
        }
        .cta-inner h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            position: relative;
        }
        .cta-inner p {
            font-size: 16px;
            color: var(--text-sub);
            margin-bottom: 28px;
            position: relative;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            padding-top: 48px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #475569;
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-contact p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 18px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-mute);
            background: var(--bg-alt);
        }
        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            right: 24px;
            bottom: 24px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--white);
            color: var(--primary);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            border: 1px solid var(--border);
            z-index: 90;
            opacity: 0;
            visibility: hidden;
            transition: all .3s ease;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-top:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 18px;
                margin-left: 12px;
            }
            .nav-actions .btn {
                padding: 9px 16px;
                font-size: 14px;
            }
            .brand-name {
                font-size: 20px;
            }
        }
        @media (max-width: 820px) {
            :root {
                --header-h: 56px;
            }
            .site-header.scrolled {
                box-shadow: none;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                margin: 0;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(16, 24, 40, .08);
                max-height: 0;
                overflow: hidden;
                transition: max-height .35s ease;
                padding: 0 24px;
            }
            .nav-menu.open {
                max-height: 360px;
                padding: 12px 24px 16px;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 14px 0;
                border-bottom: 1px solid var(--border);
                font-size: 16px;
            }
            .nav-menu a.active {
                border-bottom-color: var(--primary);
            }
            .nav-actions {
                display: none;
            }
            .nav-actions.open {
                display: flex;
                position: fixed;
                top: calc(var(--header-h) + 180px);
                left: 0;
                right: 0;
                padding: 12px 24px;
                background: var(--white);
                border-bottom: 1px solid var(--border);
                z-index: 99;
                gap: 10px;
            }
            .nav-actions.open .btn {
                flex: 1;
            }
            .page-hero {
                padding: 56px 0 44px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-content p {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .project-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 48px;
            }
            .feature-reverse .feature-media {
                order: 1;
            }
            .feature-reverse .feature-content {
                order: 2;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .scene-card-wide {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-inner {
                padding: 36px 24px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .back-top {
                right: 16px;
                bottom: 16px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }
        @media (max-width: 560px) {
            .container {
                padding: 0 16px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .project-card {
                border-radius: 10px;
            }
            .project-cover {
                height: 180px;
            }
            .project-info {
                padding: 20px 16px 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-item {
                padding: 8px 10px;
            }
            .stat-num {
                font-size: 28px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .feature-content h2 {
                font-size: 22px;
            }
            .scene-card {
                padding: 24px 20px;
            }
            .scene-card-wide {
                padding: 24px 20px;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .faq-q {
                padding: 16px 16px;
                font-size: 15px;
            }
            .faq-a {
                padding: 0 16px 16px;
                font-size: 14px;
            }
            .brand-name {
                font-size: 18px;
            }
            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1668C9;
  --primary-hover: #0E4F9E;
  --primary-light: #EAF2FC;
  --accent: #FF8A1E;
  --accent-hover: #E67700;
  --success: #12B76A;
  --success-light: #E8F8F0;
  --text: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --bg-alt: #F1F5F9;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px rgba(16, 24, 40, 0.06);
  --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.10);
  --space-section: 80px;
  --space-section-mobile: 48px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 按钮体系 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  text-align: center;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(22, 104, 201, 0.30);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(22, 104, 201, 0.35);
}

.btn-secondary {
  background: #fff;
  color: var(--primary);
  border-color: #CBD5E1;
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 6px rgba(255, 138, 30, 0.35);
  padding: 14px 36px;
}

.btn-accent:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 138, 30, 0.40);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

/* ========== 徽章 / 标签 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.4;
  font-weight: 500;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
}

.badge-accent {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.badge-success {
  background: var(--success-light);
  color: var(--success);
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(16, 24, 40, 0.04);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

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

.brand-icon {
  width: 34px;
  height: 34px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.3px;
}

.nav-menu {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
  transition: color 0.3s ease, background 0.3s ease;
}

.nav-menu a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-menu a.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-light);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.nav-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-actions .btn {
  padding: 10px 20px;
  font-size: 14px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
}

.menu-toggle:hover {
  background: var(--bg-alt);
}

/* ========== 分类页 Hero ========== */
.page-hero {
  position: relative;
  padding: 80px 0 64px;
  background-color: var(--primary-light);
  background-image: linear-gradient(135deg, rgba(234, 242, 252, 0.92) 0%, rgba(248, 250, 252, 0.88) 55%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 30%;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(22, 104, 201, 0.08);
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 10%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 138, 30, 0.10);
}

.page-hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 56px;
}

.page-hero-text {
  flex: 1;
  max-width: 640px;
}

.page-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid #C9DDF2;
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(22, 104, 201, 0.08);
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.page-hero h1 .brand-mark {
  color: var(--primary);
}

.page-hero .lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 28px;
}

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

.page-hero-media {
  flex: 0 0 360px;
  position: relative;
}

.page-hero-media .hero-img {
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  border: 4px solid rgba(255, 255, 255, 0.8);
}

.hero-float-card {
  position: absolute;
  bottom: 20px;
  left: -28px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 12px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
  border-left: 4px solid var(--accent);
}

.hero-float-card i {
  color: var(--accent);
}

/* ========== 数据条带 ========== */
.stats-bar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}

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

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  position: relative;
}

.stat-item + .stat-item::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 10%;
  height: 80%;
  width: 1px;
  background: var(--border);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.stat-icon.blue {
  background: var(--primary-light);
  color: var(--primary);
}

.stat-icon.orange {
  background: #FFF1E0;
  color: var(--accent);
}

.stat-icon.green {
  background: var(--success-light);
  color: var(--success);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========== 通用 Section ========== */
.section {
  padding: var(--space-section) 0;
}

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

.section-head {
  margin-bottom: 40px;
  max-width: 720px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.section-head h2 span {
  color: var(--primary);
}

.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.section-head .head-link {
  margin-top: 12px;
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
}

/* ========== 活动类型卡片（三列紧凑） ========== */
.activity-type-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.activity-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.activity-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.activity-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: #BDD5F0;
}

.activity-card:hover::before {
  opacity: 1;
}

.activity-card.topic::before {
  background: var(--accent);
}

.activity-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 18px;
}

.activity-card.topic .card-icon {
  background: #FFF1E0;
  color: var(--accent);
}

.activity-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.activity-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.activity-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

/* ========== 热门活动横向卡片 ========== */
.hot-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hot-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.hot-card .card-cover {
  position: relative;
  overflow: hidden;
  height: 180px;
}

.hot-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.hot-card:hover .card-cover img {
  transform: scale(1.04);
}

.hot-card .card-cover .badge-accent {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.hot-card .card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hot-card .card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.hot-card .card-meta i {
  color: var(--primary);
}

.hot-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
}

.hot-card p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

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

.hot-card .card-footer .btn {
  padding: 8px 16px;
  font-size: 13px;
}

.hot-card .status-tag {
  font-size: 12px;
  color: var(--success);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ========== 流程模块 ========== */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.flow-step {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.flow-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.flow-step .step-num {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 42px;
  font-weight: 800;
  color: var(--bg-alt);
  line-height: 1;
  z-index: 0;
}

.flow-step .step-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  position: relative;
  z-index: 1;
}

.flow-step:nth-child(2) .step-icon {
  background: #FFF1E0;
  color: var(--accent);
}

.flow-step:nth-child(3) .step-icon {
  background: var(--success-light);
  color: var(--success);
}

.flow-step:nth-child(4) .step-icon {
  background: #EFF4FB;
  color: var(--primary);
}

.flow-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.flow-step p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ========== 适用场景对比 ========== */
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.scene-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.scene-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.scene-card.wide {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--primary-light) 0%, #f5faff 100%);
  border-color: #C9DDF2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.scene-card .scene-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.scene-card .scene-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
}

.scene-card.wide .scene-icon {
  background: #fff;
  color: var(--accent);
}

.scene-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.scene-card .scene-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.scene-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scene-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

.scene-list li i {
  color: var(--success);
  margin-top: 4px;
  flex-shrink: 0;
}

.scene-card.wide .wide-content {
  flex: 1;
}

.scene-card.wide .wide-content p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
  max-width: 640px;
}

.scene-card.wide .btn {
  flex-shrink: 0;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  transition: color 0.3s ease;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ========== CTA 条 ========== */
.cta-bar {
  padding: 60px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.cta-box {
  background: var(--white);
  border: 2px solid var(--primary);
  border-radius: 16px;
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-box-text h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.cta-box-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.cta-box .btn {
  flex-shrink: 0;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 56px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: #475569;
  transition: color 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a:hover {
  color: var(--primary);
}

.footer-contact p {
  font-size: 14px;
  color: #475569;
  line-height: 1.8;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-contact i {
  color: var(--primary);
  margin-top: 5px;
  width: 16px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--white);
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 2px;
  }

  .nav-menu a {
    padding: 10px 12px;
    font-size: 14px;
  }

  .nav-actions .btn {
    padding: 10px 14px;
    font-size: 13px;
  }

  .page-hero {
    padding: 64px 0 48px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .page-hero-media {
    flex: 0 0 300px;
  }

  .activity-type-grid,
  .hot-scroll {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 16px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

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

  .navbar {
    height: 56px;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    gap: 4px;
  }

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

  .nav-menu a {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
  }

  .nav-menu a.active::after {
    left: 16px;
    right: auto;
    width: 24px;
  }

  .nav-actions {
    display: none;
  }

  .nav-actions.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 240px;
    left: 16px;
    right: 16px;
    background: var(--white);
    padding: 16px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    z-index: 99;
  }

  .nav-actions.open .btn {
    width: 100%;
  }

  .menu-toggle {
    display: flex;
  }

  .page-hero .container {
    flex-direction: column;
    gap: 32px;
  }

  .page-hero-text {
    max-width: 100%;
  }

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

  .page-hero .lead {
    font-size: 15px;
  }

  .page-hero-media {
    flex: 0 0 auto;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
  }

  .hero-float-card {
    left: 8px;
    bottom: 12px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 16px;
  }

  .stat-item + .stat-item::before {
    display: none;
  }

  .stat-item {
    padding: 12px;
    background: var(--bg);
    border-radius: 12px;
  }

  .activity-type-grid,
  .hot-scroll {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .scene-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .scene-card.wide {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

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

  .flow-step {
    padding: 24px 16px;
  }

  .flow-step .step-num {
    font-size: 34px;
  }

  .cta-box {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

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

  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 520px) {
  .page-hero h1 {
    font-size: 26px;
  }

  .page-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-hero-actions .btn {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .stat-num {
    font-size: 20px;
  }

  .section-head h2 {
    font-size: 22px;
  }

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

  .footer-contact p {
    font-size: 13px;
  }
}