/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #F97316;
  --primary-soft: #FDBA74;
  --accent: #C2410C;
  --ink: #1C1917;
  --ink-soft: #57534E;
  --bg: #FFF7ED;
  --bg-deep: #292524;
  --line: #E7E5E4;
  --white: #FFFFFF;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 24px rgba(249,115,22,0.12);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --container: 1200px;
}

/* ===== Reset / 基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color .2s ease; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select { font-family: inherit; font-size: 1rem; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
section { scroll-margin-top: 80px; }

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: .9375rem;
  padding: 12px 28px;
  border-radius: .75rem;
  transition: all .25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--white); box-shadow: 0 2px 8px rgba(249,115,22,.25); }
.btn-primary:hover { background: var(--accent); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(194,65,12,.25); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 4px rgba(194,65,12,.2); }
.btn-secondary { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); background: rgba(249,115,22,.04); }
.btn-secondary:active { transform: translateY(0); }
.btn:focus-visible, .nav-link:focus-visible, input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary-soft);
  outline-offset: 2px;
}

/* ===== 通用标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  background: #FFEDD5;
  color: var(--accent);
  line-height: 1.6;
}
.badge-hot { background: var(--accent); color: var(--white); }
.badge-new { background: var(--primary); color: var(--white); }

/* ===== 板块标题 ===== */
.section-head { margin-bottom: 2rem; max-width: 720px; }
.section-eyebrow {
  display: inline-block;
  font-size: .8125rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(249,115,22,.08);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: .03em;
}
.section-title { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; line-height: 1.3; letter-spacing: -.01em; }
.section-desc { margin-top: 12px; color: var(--ink-soft); font-size: .9375rem; }

/* ===== Header 顶栏 ===== */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255,247,237,.92);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; color: var(--ink); letter-spacing: -.01em; flex-shrink: 0; }
.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-soft));
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  box-shadow: 0 4px 10px rgba(249,115,22,.3);
}
.logo-text span { color: var(--primary); }
.header-search { flex: 1; max-width: 360px; position: relative; margin: 0 auto; }
.header-search input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  padding: 0 16px 0 38px;
  font-size: .875rem;
  color: var(--ink);
  transition: all .25s;
}
.header-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(249,115,22,.12); outline: none; }
.header-search i {
  position: absolute;
  left: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--ink-soft);
  font-size: .875rem;
  pointer-events: none;
}
.header-actions { display: flex; align-items: center; gap: 12px; margin-left: auto; flex-shrink: 0; }
.header-select {
  position: relative;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  font-size: .8125rem;
  color: var(--ink);
  cursor: pointer;
  gap: 6px;
  transition: border-color .2s;
}
.header-select:hover { border-color: var(--primary); }
.header-select i { font-size: .75rem; color: var(--ink-soft); }

/* ===== 导航 ===== */
.nav-bar { border-top: 1px solid var(--line); }
.nav-wrap { display: flex; align-items: center; height: 48px; }
.site-nav { display: flex; gap: 28px; }
.nav-link {
  font-weight: 500;
  font-size: .9375rem;
  color: var(--ink-soft);
  position: relative;
  padding: 8px 0;
  transition: color .2s;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.menu-toggle { display: none; background: none; border: none; font-size: 1.25rem; color: var(--ink); padding: 8px; }

/* ===== Hero ===== */
.hero {
  padding: 80px 0 48px;
  background:
    radial-gradient(circle at 20% 20%, rgba(249,115,22,.08), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(253,186,116,.12), transparent 40%),
    linear-gradient(180deg, #FFF7ED, #FFEDD5);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(249,115,22,.06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; text-align: center; max-width: 920px; margin: 0 auto; }
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -.02em;
  color: var(--ink);
}
.hero h1 .highlight { color: var(--primary); position: relative; white-space: nowrap; }
.hero-sub {
  max-width: 680px;
  margin: 20px auto 0;
  color: var(--ink-soft);
  font-size: 1.0625rem;
  line-height: 1.7;
}
.hero-search {
  max-width: 560px;
  margin: 32px auto 0;
  position: relative;
}
.hero-search input {
  width: 100%;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  padding: 0 120px 0 48px;
  font-size: .9375rem;
  box-shadow: var(--shadow);
  transition: all .25s;
}
.hero-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(249,115,22,.12); outline: none; }
.hero-search i { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--ink-soft); }
.hero-search .btn { position: absolute; right: 4px; top: 4px; height: 44px; padding: 0 24px; border-radius: 999px; font-size: .875rem; }
.hero-ctas { display: flex; justify-content: center; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

/* ===== Hero 图标矩阵 ===== */
.hero-matrix {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  max-width: 960px;
  margin: 48px auto 0;
}
.matrix-item {
  background: rgba(255,255,255,.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 8px;
  text-align: center;
  transition: all .25s;
  backdrop-filter: blur(4px);
}
.matrix-item:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.matrix-item i { font-size: 1.5rem; color: var(--primary); margin-bottom: 8px; }
.matrix-item span { font-size: .8125rem; font-weight: 600; color: var(--ink); display: block; }

/* ===== Hero 状态条 ===== */
.hero-status {
  margin-top: 36px;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  background: var(--bg-deep);
  color: rgba(255,255,255,.85);
  padding: 12px 28px;
  border-radius: 999px;
  font-size: .8125rem;
  box-shadow: 0 8px 24px rgba(41,37,36,.2);
}
.hero-status strong { color: var(--primary-soft); font-weight: 700; }

/* ===== KPI 数据 ===== */
.kpi {
  padding: 80px 0;
  position: relative;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
}
.kpi::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(28,25,23,.94), rgba(41,37,36,.88));
}
.kpi-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.kpi-copy h2 { color: var(--white); }
.kpi-copy p { margin-top: 16px; color: rgba(255,255,255,.7); font-size: .9375rem; }
.kpi-points { margin-top: 24px; display: grid; gap: 12px; }
.kpi-points li { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,.8); font-size: .875rem; }
.kpi-points i { color: var(--primary-soft); font-size: .875rem; }
.kpi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.kpi-item {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: background .25s;
}
.kpi-item:hover { background: rgba(255,255,255,.1); }
.kpi-number {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  font-weight: 800;
  color: var(--primary-soft);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.kpi-label { margin-top: 8px; color: rgba(255,255,255,.7); font-size: .875rem; }

/* ===== 资讯列表 ===== */
.news { padding: 80px 0; background: var(--white); }
.news-layout { display: grid; grid-template-columns: 1fr 340px; gap: 48px; align-items: start; }
.news-list { display: flex; flex-direction: column; gap: 14px; }
.news-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all .25s;
}
.news-item:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); background: var(--white); }
.news-date { color: var(--ink-soft); font-size: .8125rem; white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.news-date i { color: var(--primary); }
.news-title { flex: 1; font-weight: 600; font-size: .9375rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-item:hover .news-title { color: var(--primary); }
.news-tag { flex-shrink: 0; }
.news-arrow { color: var(--ink-soft); font-size: .8125rem; transition: transform .2s; flex-shrink: 0; }
.news-item:hover .news-arrow { transform: translateX(4px); color: var(--primary); }

/* ===== 资讯侧栏 ===== */
.news-side { display: flex; flex-direction: column; gap: 20px; }
.side-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.side-card h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 16px; }
.side-list { display: flex; flex-direction: column; gap: 12px; }
.side-list a {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: .875rem;
  color: var(--ink-soft);
  transition: color .2s;
}
.side-list a:hover { color: var(--primary); }
.side-list i { font-size: .75rem; margin-top: 5px; color: var(--primary); flex-shrink: 0; }
.side-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.side-tags a {
  font-size: .8125rem;
  color: var(--ink-soft);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 4px 14px;
  border-radius: 999px;
  transition: all .2s;
}
.side-tags a:hover { border-color: var(--primary); color: var(--primary); }
.side-card img { border-radius: .75rem; margin-bottom: 12px; aspect-ratio: 16/9; object-fit: cover; width: 100%; }

/* ===== 服务卡片 ===== */
.services { padding: 80px 0; background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.service-icon {
  width: 48px; height: 48px;
  background: rgba(249,115,22,.08);
  border-radius: .75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  margin-bottom: 18px;
}
.service-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 8px; }
.service-card p { font-size: .875rem; color: var(--ink-soft); flex: 1; }
.service-tags { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }

/* ===== App 下载 ===== */
.app-section { padding: 80px 0; background: var(--white); }
.app-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.app-media img { border-radius: var(--radius-lg); aspect-ratio: 4/3; object-fit: cover; width: 100%; box-shadow: var(--shadow); }
.app-platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
.app-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: all .25s;
}
.app-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.app-card i { font-size: 1.5rem; color: var(--primary); }
.app-card h4 { font-size: .9375rem; font-weight: 700; margin-top: 8px; }
.app-card span { font-size: .75rem; color: var(--ink-soft); display: block; margin-top: 4px; }
.app-card a { display: inline-block; margin-top: 10px; font-size: .8125rem; color: var(--primary); font-weight: 600; }
.app-card a:hover { color: var(--accent); }
.app-copy h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; }
.app-copy p { margin-top: 14px; color: var(--ink-soft); }

/* ===== FAQ ===== */
.faq { padding: 80px 0; background: var(--bg); }
.faq-layout { display: grid; grid-template-columns: 340px 1fr; gap: 48px; align-items: start; }
.faq-side { position: sticky; top: 120px; }
.faq-side h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; }
.faq-side p { margin-top: 14px; color: var(--ink-soft); }
.faq-side .btn { margin-top: 20px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all .25s;
  overflow: hidden;
}
.faq-item:hover { border-color: var(--primary-soft); }
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  font-weight: 600;
  font-size: .9375rem;
  text-align: left;
  gap: 12px;
  transition: color .2s;
}
.faq-q:hover { color: var(--primary); }
.faq-icon { flex-shrink: 0; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; color: var(--primary); transition: transform .3s; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease, border-color .3s;
  border-left: 3px solid var(--primary);
  padding: 0 20px;
  background: linear-gradient(135deg, #FFF7ED, #FFFFFF);
  color: var(--ink-soft);
  font-size: .875rem;
  line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 320px; padding: 4px 20px 18px; }

/* ===== CTA ===== */
.cta { padding: 64px 0; background: linear-gradient(120deg, #FDBA74, #F97316); position: relative; overflow: hidden; }
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.15) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; gap: 32px; flex-wrap: wrap; }
.cta-copy h2 { font-size: clamp(1.375rem, 3vw, 2rem); font-weight: 800; color: var(--ink); }
.cta-copy p { margin-top: 6px; color: rgba(28,25,23,.75); font-size: .9375rem; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-actions .btn-secondary { background: var(--white); border-color: var(--white); color: var(--ink); }
.cta-actions .btn-secondary:hover { background: transparent; color: var(--white); border-color: var(--white); }
.cta-contact { display: flex; gap: 28px; margin-top: 32px; flex-wrap: wrap; font-size: .875rem; color: rgba(28,25,23,.8); align-items: center; }
.cta-contact span { display: inline-flex; align-items: center; gap: 6px; }
.cta-contact i { color: var(--white); }

/* ===== 页脚 ===== */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,.7); }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 40px;
}
.footer-brand .logo { color: var(--white); margin-bottom: 14px; }
.footer-brand p { font-size: .875rem; max-width: 300px; }
.footer-col h4 {
  color: var(--white);
  font-size: .9375rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { font-size: .875rem; color: rgba(255,255,255,.7); transition: color .2s; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 24px 0 32px;
  text-align: center;
}
.footer-copy { font-size: .8125rem; color: rgba(255,255,255,.5); margin-bottom: 18px; }
.footer-copy a { color: rgba(255,255,255,.7); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.footer-tags a {
  font-size: .75rem;
  color: rgba(255,255,255,.6);
  background: rgba(255,255,255,.08);
  padding: 4px 14px;
  border-radius: 999px;
  transition: all .2s;
}
.footer-tags a:hover { background: var(--primary); color: var(--white); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-matrix { grid-template-columns: repeat(3, 1fr); }
  .news-layout { grid-template-columns: 1fr; }
  .news-side { flex-direction: row; flex-wrap: wrap; }
  .side-card { flex: 1; min-width: 280px; }
  .app-layout { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .header-inner { gap: 12px; }
  .header-search { display: none; }
  .header-actions .lang-select { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-bar { position: relative; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    flex-direction: column;
    padding: 12px 20px;
    gap: 4px;
  }
  .site-nav.open { display: flex; }
  .nav-link { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-link:last-child { border-bottom: none; }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: rgba(249,115,22,.06); border-radius: .5rem; padding-left: 12px; }
  .hero { padding: 56px 0 36px; }
  .hero-matrix { grid-template-columns: repeat(2, 1fr); }
  .hero-status { border-radius: 1.25rem; padding: 12px 20px; }
  .kpi-inner { grid-template-columns: 1fr; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-side { position: static; }
  .app-platforms { grid-template-columns: repeat(3, 1fr); }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-actions { justify-content: center; }
  .cta-contact { justify-content: center; gap: 16px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: .9375rem; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }
  .hero-search input { padding-right: 16px; }
  .hero-search .btn { position: static; width: 100%; margin-top: 8px; height: 44px; }
  .services-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .app-platforms { grid-template-columns: 1fr; }
  .news-item { flex-wrap: wrap; gap: 8px; }
  .news-date { width: 100%; }
  .news-title { white-space: normal; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .side-card { min-width: 100%; }
  .hero-matrix { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .matrix-item { padding: 14px 6px; }
  .matrix-item i { font-size: 1.25rem; }
  .matrix-item span { font-size: .75rem; }
}

/* roulang page: category1 */
:root {
    --primary: #F97316;
    --primary-soft: #FDBA74;
    --accent: #C2410C;
    --ink: #1C1917;
    --ink-soft: #57534E;
    --bg: #FFF7ED;
    --bg-deep: #292524;
    --line: #E7E5E4;
    --white: #FFFFFF;
    --radius: 1rem;
    --radius-lg: 1.5rem;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 24px rgba(249,115,22,0.12);
    --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
    --container: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    color: var(--ink);
    background: #fff;
    line-height: 1.75;
    font-size: 1rem;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color .2s ease; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select { font-family: inherit; font-size: 1rem; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
section { scroll-margin-top: 80px; }

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: .9375rem;
    padding: 12px 28px;
    border-radius: .75rem;
    transition: all .25s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--white); box-shadow: 0 2px 8px rgba(249,115,22,.25); }
.btn-primary:hover { background: var(--accent); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(194,65,12,.25); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 4px rgba(194,65,12,.2); }
.btn-secondary { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); background: rgba(249,115,22,.04); }
.btn-secondary:active { transform: translateY(0); }
.btn:focus-visible, .nav-link:focus-visible, input:focus-visible, select:focus-visible, button:focus-visible, summary:focus-visible {
    outline: 2px solid var(--primary-soft);
    outline-offset: 2px;
}

/* ===== 通用标签 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: .75rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 999px;
    background: #FFEDD5;
    color: var(--accent);
    line-height: 1.6;
}
.badge-hot { background: var(--accent); color: var(--white); }
.badge-new { background: var(--primary); color: var(--white); }

/* ===== 板块标题 ===== */
.section-head { margin-bottom: 2rem; max-width: 720px; }
.section-eyebrow {
    display: inline-block;
    font-size: .8125rem;
    font-weight: 700;
    color: var(--primary);
    background: rgba(249,115,22,.08);
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 12px;
    letter-spacing: .03em;
}
.section-title { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; line-height: 1.3; letter-spacing: -.01em; }
.section-desc { margin-top: 12px; color: var(--ink-soft); font-size: .9375rem; }

/* ===== Header 顶栏 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,247,237,.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; color: var(--ink); letter-spacing: -.01em; flex-shrink: 0; }
.logo-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-soft));
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(249,115,22,.3);
}
.logo-text span { color: var(--primary); }
.header-search { flex: 1; max-width: 360px; position: relative; margin: 0 auto; }
.header-search input {
    width: 100%;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--white);
    padding: 0 16px 0 38px;
    font-size: .875rem;
    color: var(--ink);
    transition: all .25s;
}
.header-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(249,115,22,.12); outline: none; }
.header-search i {
    position: absolute;
    left: 14px; top: 50%;
    transform: translateY(-50%);
    color: var(--ink-soft);
    font-size: .875rem;
    pointer-events: none;
}
.header-actions { display: flex; align-items: center; gap: 12px; margin-left: auto; flex-shrink: 0; }
.header-select {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--white);
    font-size: .8125rem;
    color: var(--ink);
    cursor: pointer;
    transition: border-color .2s;
}
.header-select:hover { border-color: var(--primary); }
.header-select i { font-size: .75rem; color: var(--ink-soft); }
.menu-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; font-size: 1.25rem; color: var(--ink); margin-left: auto; }

/* ===== 导航 ===== */
.nav-bar { border-top: 1px solid var(--line); background: rgba(255,247,237,.95); position: relative; }
.nav-wrap { display: flex; align-items: center; height: 48px; }
.site-nav { display: flex; gap: 28px; list-style: none; }
.nav-link {
    font-weight: 500;
    font-size: .9375rem;
    color: var(--ink-soft);
    position: relative;
    padding: 8px 0;
    transition: color .2s;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

/* ===== 分类页主布局 ===== */
.doc-main { padding: 28px 0 64px; background: #fff; }
.doc-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr) 200px; gap: 28px; align-items: start; }

/* ===== 左侧文档侧栏 ===== */
.doc-sidebar { position: sticky; top: 84px; }
.sidebar-inner { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.sidebar-head { margin-bottom: 16px; }
.sidebar-label { display: block; font-size: .8125rem; color: var(--ink-soft); font-weight: 600; margin-bottom: 6px; }
.sidebar-select {
    width: 100%;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: .75rem;
    background: var(--white);
    padding: 0 12px;
    font-size: .875rem;
    color: var(--ink);
}
.doc-tree { margin-bottom: 20px; }
.tree-group-title { font-size: .75rem; font-weight: 700; color: var(--ink-soft); letter-spacing: .06em; margin: 16px 0 8px; text-transform: uppercase; }
.doc-tree ul { list-style: none; }
.doc-tree ul ul { margin-left: 12px; }
.doc-tree li a {
    display: block;
    padding: 7px 12px;
    border-radius: .625rem;
    font-size: .875rem;
    color: var(--ink-soft);
    border-left: 3px solid transparent;
    transition: all .2s;
}
.doc-tree li a:hover { color: var(--primary); background: rgba(249,115,22,.05); }
.doc-tree li.active > a { color: var(--primary); font-weight: 600; background: rgba(249,115,22,.08); border-left-color: var(--primary); }
.sidebar-card {
    background: linear-gradient(135deg, #FFF7ED, #FFEDD5);
    border: 1px solid rgba(249,115,22,.15);
    border-radius: .75rem;
    padding: 14px 16px;
}
.sidebar-card-title { display: flex; align-items: center; gap: 6px; font-weight: 700; font-size: .875rem; color: var(--accent); margin-bottom: 6px; }
.sidebar-card p { font-size: .8125rem; color: var(--ink-soft); line-height: 1.6; }

/* ===== 中间内容区 ===== */
.doc-content { min-width: 0; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .8125rem; color: var(--ink-soft); margin-bottom: 16px; }
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--line); }
.doc-title { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 800; line-height: 1.3; letter-spacing: -.01em; margin-bottom: 10px; }
.doc-desc { color: var(--ink-soft); font-size: .9375rem; max-width: 720px; margin-bottom: 24px; }

/* ===== 筛选行 ===== */
.filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-bottom: 24px;
}
.filter-sort { display: flex; align-items: center; gap: 8px; font-size: .875rem; color: var(--ink-soft); }
.filter-sort select { height: 36px; border: 1px solid var(--line); border-radius: .625rem; background: var(--white); padding: 0 10px; font-size: .8125rem; color: var(--ink); }
.filter-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-tag {
    padding: 5px 14px;
    border-radius: 999px;
    font-size: .8125rem;
    color: var(--ink-soft);
    background: var(--white);
    border: 1px solid var(--line);
    transition: all .2s;
}
.filter-tag:hover { color: var(--primary); border-color: var(--primary); }
.filter-tag.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* ===== 平台小卡 ===== */
.platform-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.platform-card {
    display: block;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 16px;
    text-align: center;
    transition: all .25s;
}
.platform-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.platform-card i { font-size: 1.75rem; color: var(--primary); margin-bottom: 10px; }
.platform-card h3 { font-size: .9375rem; font-weight: 700; margin-bottom: 4px; }
.platform-card p { font-size: .8125rem; color: var(--ink-soft); }

/* ===== 资源卡片列表 ===== */
.resource-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 24px; }
.resource-card {
    display: flex;
    gap: 20px;
    align-items: center;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
    transition: all .25s;
}
.resource-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.resource-thumb { position: relative; flex-shrink: 0; width: 220px; aspect-ratio: 16 / 9; border-radius: .875rem; overflow: hidden; }
.resource-thumb img { width: 100%; height: 100%; object-fit: cover; }
.resource-thumb .badge { position: absolute; top: 8px; left: 8px; }
.resource-body { flex: 1; min-width: 0; }
.resource-body h3 { font-size: 1.0625rem; font-weight: 700; line-height: 1.4; margin-bottom: 6px; }
.resource-body h3 a:hover { color: var(--primary); }
.resource-summary {
    font-size: .875rem;
    color: var(--ink-soft);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.resource-meta { display: flex; flex-wrap: wrap; gap: 14px; font-size: .8125rem; color: var(--ink-soft); margin-bottom: 8px; }
.resource-meta span { display: inline-flex; align-items: center; gap: 5px; }
.resource-meta i { color: var(--primary); }
.resource-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.detail-link { margin-left: auto; font-size: .8125rem; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }
.detail-link i { transition: transform .2s; }
.detail-link:hover i { transform: translateX(4px); }

/* ===== 分页器 ===== */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 32px 0 8px; }
.page-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .875rem;
    color: var(--ink-soft);
    border: 1px solid var(--line);
    background: var(--white);
    transition: all .2s;
}
.page-btn:hover { background: var(--bg); color: var(--primary); border-color: var(--primary); }
.page-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); font-weight: 700; }
.page-btn.disabled { opacity: .4; pointer-events: none; }
.page-ellipsis { color: var(--ink-soft); padding: 0 4px; }

/* ===== 右侧窄栏 ===== */
.doc-aside { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 20px; }
.aside-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.aside-title { display: flex; align-items: center; gap: 8px; font-size: 1rem; font-weight: 700; margin-bottom: 14px; }
.aside-title::before { content: ""; width: 3px; height: 18px; background: var(--primary); border-radius: 2px; }
.hot-list { list-style: none; counter-reset: hot; }
.hot-list li { counter-increment: hot; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: .875rem; }
.hot-list li:last-child { border-bottom: none; }
.hot-list a { display: block; position: relative; padding-left: 26px; color: var(--ink-soft); line-height: 1.5; transition: color .2s; }
.hot-list a::before {
    content: counter(hot);
    position: absolute;
    left: 0; top: 7px;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--bg);
    color: var(--accent);
    font-size: .6875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hot-list a:hover { color: var(--primary); }
.aside-ad { padding: 0; overflow: hidden; border-color: rgba(249,115,22,.25); }
.ad-placeholder {
    padding: 24px 12px;
    text-align: center;
    background:
        linear-gradient(rgba(41,37,36,.5), rgba(41,37,36,.6)),
        url('/assets/images/backpic/back-3.jpg') center / cover no-repeat;
}
.ad-placeholder span { display: inline-block; font-weight: 700; color: var(--primary-soft); font-size: .875rem; background: rgba(0,0,0,.3); padding: 2px 12px; border-radius: 999px; }
.ad-placeholder p { font-size: .75rem; color: rgba(255,255,255,.8); margin-top: 6px; }

/* ===== FAQ ===== */
.faq-section { margin-top: 40px; }
.faq-section .section-title { font-size: 1.5rem; }
.faq-list { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color .25s;
}
.faq-item[open] { border-color: var(--primary); }
.faq-item summary {
    list-style: none;
    padding: 16px 20px;
    font-weight: 600;
    font-size: .9375rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transition: background .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: rgba(249,115,22,.04); }
.faq-icon {
    flex-shrink: 0;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--bg);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
    transition: transform .3s;
}
.faq-item[open] summary .faq-icon { transform: rotate(45deg); background: var(--primary); color: var(--white); }
.faq-answer {
    padding: 0 20px 16px 40px;
    color: var(--ink-soft);
    font-size: .875rem;
    border-left: 3px solid var(--primary);
    margin-left: 20px;
}

/* ===== CTA ===== */
.cta-box {
    margin-top: 40px;
    background: linear-gradient(135deg, #FFF7ED, #FFEDD5);
    border: 1px solid rgba(249,115,22,.2);
    border-radius: var(--radius-lg);
    padding: 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}
.cta-content h2 { font-size: 1.375rem; font-weight: 800; margin-bottom: 6px; }
.cta-content p { color: var(--ink-soft); font-size: .875rem; max-width: 480px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.contact-line {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    width: 100%;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed rgba(249,115,22,.2);
    font-size: .8125rem;
    color: var(--ink-soft);
}
.contact-line span { display: inline-flex; align-items: center; gap: 6px; }
.contact-line i { color: var(--primary); }

/* ===== 移动端分类标签条 ===== */
.mobile-cat-tabs {
    display: none;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 8px;
    padding: 12px 0;
    white-space: nowrap;
}
.mobile-cat-tabs a {
    display: inline-flex;
    flex-shrink: 0;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--line);
    font-size: .8125rem;
    color: var(--ink-soft);
    transition: all .2s;
}
.mobile-cat-tabs a.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* ===== Footer ===== */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,.8); padding: 60px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 40px; }
.footer-brand .logo-text { color: var(--white); }
.footer-brand .logo-text span { color: var(--primary-soft); }
.footer-brand p { font-size: .875rem; color: rgba(255,255,255,.6); margin-top: 12px; max-width: 320px; line-height: 1.7; }
.footer-col h4 { color: var(--white); font-size: .9375rem; font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,.65); font-size: .875rem; transition: color .2s; }
.footer-col a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 20px; text-align: center; }
.footer-copy { font-size: .75rem; color: rgba(255,255,255,.5); margin-bottom: 16px; }
.footer-copy a { color: rgba(255,255,255,.6); }
.footer-copy a:hover { color: var(--primary-soft); }
.footer-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.footer-tags a {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    color: rgba(255,255,255,.7);
    font-size: .75rem;
    transition: all .2s;
}
.footer-tags a:hover { background: var(--primary); color: var(--white); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .doc-layout { grid-template-columns: 240px minmax(0, 1fr); }
    .doc-aside { display: none; }
}
@media (max-width: 767px) {
    .header-search { display: none; }
    .header-actions { display: none; }
    .menu-toggle { display: inline-flex; }
    .nav-bar { position: relative; }
    .site-nav {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--white);
        border-top: 1px solid var(--line);
        box-shadow: var(--shadow);
        padding: 8px 20px;
        z-index: 99;
    }
    .site-nav.open { display: flex; }
    .site-nav li { width: 100%; }
    .nav-link { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); }
    .nav-link.active::after { display: none; }
    .nav-wrap { height: auto; }
    .doc-main { padding-top: 0; }
    .doc-layout { display: block; }
    .mobile-cat-tabs { display: flex; }
    .doc-sidebar { display: none; }
    .platform-cards { grid-template-columns: 1fr 1fr 1fr; }
    .resource-card { flex-direction: column; align-items: flex-start; }
    .resource-thumb { width: 100%; }
    .detail-link { margin-left: 0; }
    .filter-row { flex-direction: column; align-items: flex-start; }
    .filter-tags { overflow-x: auto; flex-wrap: nowrap; white-space: nowrap; width: 100%; padding-bottom: 4px; }
    .filter-tags::-webkit-scrollbar { display: none; }
    .cta-box { flex-direction: column; align-items: flex-start; padding: 24px; }
    .contact-line { gap: 12px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
    .doc-title { font-size: 1.5rem; }
    .platform-cards { grid-template-columns: 1fr; }
}