/* roulang page: index */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --dark-ink:#F2F1EC;
  --dark-ink-2:#9BA5A3;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sh-1:0 1px 2px rgba(12,20,24,.04),0 8px 24px -12px rgba(12,20,24,.12);
  --sh-2:0 2px 6px rgba(12,20,24,.06),0 18px 40px -16px rgba(12,20,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--ink);
  --bs-border-color:var(--line);
  --bs-primary:var(--brand);
  --bs-primary-rgb:14,122,107;
  --bs-font-sans-serif:var(--font-sans);
  --bs-link-color:var(--brand);
  --bs-link-hover-color:var(--brand-deep);
  --bs-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.85;color:var(--ink);
  background:var(--paper);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  font-feature-settings:"tnum" 1,"ss01" 1;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);}
h1{font-size:clamp(40px,5.2vw,68px);line-height:1.08;font-weight:800;letter-spacing:-.02em;}
h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:700;letter-spacing:-.01em;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:110px 0;}
.section-tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:48px;}
.section-head .eyebrow{font-size:12px;letter-spacing:.12em;color:var(--ink-3);text-transform:uppercase;margin-bottom:12px;display:block;}
.section-head p.lead-line{margin:14px 0 0;color:var(--ink-2);font-size:16px;max-width:640px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  white-space:nowrap;transition:color .18s var(--ease);}
.text-link svg{transition:transform .2s var(--ease);}
.text-link:hover{color:var(--brand-deep);}
.text-link:hover svg{transform:translateX(3px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;height:72px;display:flex;align-items:center;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:28px;height:28px;display:block;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;}
.nav-item{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--ink-2);padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-item::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);
  transition:width .2s var(--ease);}
.nav-item:hover{color:var(--ink);}
.nav-item:hover::after{width:100%;}
.nav-item.active{color:var(--brand);font-weight:600;}
.nav-item.active::after{width:100%;}
.nav-item.active::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--brand);flex:0 0 auto;}
.nav-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:40px;width:220px;padding:0 16px;
  border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.7);
  transition:width .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.nav-search svg{flex:0 0 auto;color:var(--ink-3);}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.nav-search input::placeholder{color:var(--ink-3);}
.btn-ghost{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;font-size:14px;font-weight:600;
  border:1px solid var(--ink);border-radius:10px;color:var(--ink);background:transparent;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-accent{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 20px;font-size:14px;font-weight:600;
  border:0;border-radius:999px;background:var(--accent);color:#fff;white-space:nowrap;
  transition:background .18s var(--ease);
}
.btn-accent:hover{background:var(--accent-deep);color:#fff;}
.nav-toggle{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.7);cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.drawer-extra{display:none;}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:72px 0 96px;background-color:var(--paper);
  background-image:radial-gradient(rgba(12,20,24,.04) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero-eyebrow{font-size:12px;letter-spacing:.12em;color:var(--ink-3);display:block;margin-bottom:20px;}
.hero-rule{width:64px;height:4px;background:var(--brand);margin-bottom:28px;}
.hero h1{margin-bottom:20px;}
.hero-sub{font-size:18px;line-height:1.7;color:var(--ink-2);margin-bottom:32px;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.btn-primary-solid{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 28px;font-size:15px;font-weight:600;
  border:0;border-radius:10px;background:var(--brand);color:#fff;
  transition:background .18s var(--ease);
}
.btn-primary-solid:hover{background:var(--brand-deep);color:#fff;}
.btn-primary-solid svg{transition:transform .2s var(--ease);}
.btn-primary-solid:hover svg{transform:translateX(3px);}
.btn-outline-ink{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 26px;font-size:15px;font-weight:600;
  border:1px solid var(--ink);border-radius:10px;background:transparent;color:var(--ink);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-outline-ink:hover{background:var(--ink);color:#fff;}
.btn-outline-ink svg{transition:transform .2s var(--ease);}
.btn-outline-ink:hover svg{transform:translateX(3px);}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--ink-3);}
.hero-facts li{position:relative;padding-right:12px;}
.hero-facts li:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;width:3px;height:3px;border-radius:50%;background:var(--line);transform:translateY(-50%);}
.hero-visual{position:relative;}
.hero-figure{
  position:relative;border-radius:18px;overflow:hidden;aspect-ratio:4/3;background:var(--brand-tint);
  box-shadow:var(--sh-1);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";position:absolute;inset:0;background:var(--brand);opacity:.08;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.45);border-radius:18px;pointer-events:none;
}
.hero-chip{
  position:absolute;left:20px;bottom:20px;background:var(--surface);border-radius:12px;
  padding:14px 18px;box-shadow:var(--sh-1);border:1px solid var(--line);min-width:150px;
}
.hero-chip b{display:block;font-size:16px;font-weight:800;color:var(--brand);line-height:1.2;}
.hero-chip span{display:block;font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-top:4px;}

/* ---------- 指标看板 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric-card{
  background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px;
  box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.metric-num{font-size:clamp(36px,4vw,56px);line-height:1;font-weight:800;color:var(--accent);
  letter-spacing:-.02em;display:flex;align-items:baseline;gap:6px;}
.metric-card:nth-child(2) .metric-num{color:var(--brand);}
.metric-unit{font-size:14px;font-weight:600;color:var(--ink-2);}
.metric-label{font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-top:14px;}
.metric-divider{height:1px;background:var(--line);margin:16px 0 14px;}
.metric-desc{font-size:13px;line-height:1.75;color:var(--ink-2);margin:0;}

/* ---------- 服务矩阵 Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.bento-card{
  background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.bento-large{grid-column:span 3;grid-row:span 2;background:var(--brand-tint);}
.bento-small{grid-column:span 3;}
.bento-large .bento-media{border-radius:12px;overflow:hidden;aspect-ratio:16/9;margin-bottom:24px;background:rgba(255,255,255,.6);}
.bento-large .bento-media img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.bento-large:hover .bento-media img{transform:scale(1.04);}
.bento-icon{
  width:44px;height:44px;border-radius:12px;background:var(--surface);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;color:var(--brand);
}
.bento-large h3{font-size:20px;margin-bottom:12px;}
.bento-small h3{font-size:17px;margin-bottom:10px;}
.bento-card p{font-size:15px;line-height:1.8;color:var(--ink-2);margin-bottom:20px;}
.bento-large .bento-foot{margin-top:auto;padding-top:16px;border-top:1px solid rgba(12,20,24,.08);}
.bento-small{position:relative;}
.bento-small .bento-arrow{position:absolute;right:24px;bottom:24px;color:var(--ink-3);transition:color .18s var(--ease),transform .2s var(--ease);}
.bento-small:hover .bento-arrow{color:var(--brand);transform:translate(3px,-3px);}

/* ---------- 结果对比 ---------- */
.compare-note{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.tag-pill{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:12px;letter-spacing:.04em;color:var(--ink-2);
}
.compare-grid{display:grid;grid-template-columns:1fr 1px 1fr;gap:0;}
.compare-col{padding:0 40px;}
.compare-col:first-child{padding-left:0;}
.compare-col:last-child{padding-right:0;}
.compare-divider{background:var(--line);}
.compare-col h3{font-size:18px;margin-bottom:8px;}
.compare-col .compare-hint{font-size:13px;color:var(--ink-3);margin-bottom:28px;}
.compare-row{margin-bottom:26px;}
.compare-row-top{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:10px;}
.compare-row-top span{font-size:15px;color:var(--ink-2);}
.compare-row-top b{font-size:14px;font-weight:700;color:var(--ink-3);}
.bar-track{height:8px;border-radius:999px;background:var(--line);overflow:hidden;}
.bar-fill{height:100%;border-radius:999px;background:var(--ink-3);width:0;transition:width 1s var(--ease);}
.compare-col.is-brand .compare-row-top span{color:var(--ink);font-weight:600;}
.compare-col.is-brand .compare-row-top b{color:var(--brbrand,#0E7A6B);}
.compare-col.is-brand .compare-row-top b{color:var(--brand);}
.bar-fill.is-brand{background:var(--brand);}
.compare-cta{margin-top:48px;display:flex;justify-content:center;}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.badge-cat{
  align-self:flex-start;font-size:12px;letter-spacing:.04em;color:var(--brand);
  background:var(--brand-tint);border-radius:10px;padding:4px 10px;margin-bottom:14px;
}
.news-body h3{font-size:18px;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{font-size:15px;line-height:1.8;color:var(--ink-2);margin-bottom:20px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);padding-top:16px;border-top:1px solid var(--line);}
.news-meta svg{transition:transform .2s var(--ease);color:var(--ink-3);}
.news-card:hover .news-meta svg{transform:translateX(3px);color:var(--brand);}
.news-card a.stretch{position:absolute;inset:0;z-index:2;border-radius:16px;}
.news-card a.stretch:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  padding:64px 24px;background:var(--surface);border:1px dashed var(--line);border-radius:16px;text-align:center;
}
.empty-state svg{color:var(--ink-3);}
.empty-state strong{font-size:16px;font-weight:600;color:var(--ink);}
.empty-state span{font-size:14px;color:var(--ink-3);}
.empty-state .btn-outline-ink{margin-top:8px;height:44px;padding:0 22px;font-size:14px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--line);
  transition:background .2s var(--ease);
}
.faq-item.is-open::before{background:var(--brand);}
.faq-btn{
  width:100%;min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:16px 0 16px 20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-btn:hover{color:var(--brand-deep);}
.faq-sign{flex:0 0 auto;width:20px;height:20px;position:relative;transition:transform .2s var(--ease);}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--ink-2);border-radius:2px;}
.faq-sign::before{left:0;top:9px;width:20px;height:2px;}
.faq-sign::after{left:9px;top:0;width:2px;height:20px;}
.faq-item.is-open .faq-sign{transform:rotate(45deg);}
.faq-item.is-open .faq-sign::before,.faq-item.is-open .faq-sign::after{background:var(--brand);}
.faq-panel{display:none;padding:0 0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:760px;}
.faq-item.is-open .faq-panel{display:block;}

/* ---------- 转化表单 ---------- */
.form-card{
  max-width:680px;margin:0 auto;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:40px;box-shadow:var(--sh-1);
}
.form-card h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:12px;}
.form-card .form-intro{font-size:15px;color:var(--ink-2);margin-bottom:32px;}
.field{margin-bottom:20px;}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;font-weight:500;}
.field .req{color:var(--accent);margin-left:2px;}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;background:var(--surface);
  padding:0 14px;height:48px;font-size:15px;color:var(--ink);outline:none;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-submit{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;height:52px;
  border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  transition:background .18s var(--ease);
}
.form-submit:hover{background:var(--brand-deep);}
.form-submit svg{transition:transform .2s var(--ease);}
.form-submit:hover svg{transform:translateX(3px);}
.form-note{display:none;margin-top:20px;padding:14px 18px;border-radius:12px;font-size:14px;}
.form-note.is-ok{display:block;background:var(--brand-tint);color:var(--brand-deep);}
.form-note.is-err{display:block;background:var(--accent-tint);color:var(--accent-deep);}
.form-tip{font-size:12px;color:var(--ink-3);margin-top:16px;line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-ink);padding:64px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:var(--dark-ink);font-size:17px;font-weight:700;}
.footer-desc{font-size:13px;line-height:1.8;color:var(--dark-ink-2);max-width:300px;}
.footer-title{font-size:12px;letter-spacing:.12em;color:var(--dark-ink-2);margin-bottom:20px;}
.footer-list li{margin-bottom:12px;}
.footer-list a,.footer-list span{font-size:14px;color:rgba(242,241,236,.8);transition:color .18s var(--ease);}
.footer-list a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);padding-top:24px;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--dark-ink-2);
}
.footer-bottom .foot-right{display:flex;flex-wrap:wrap;gap:16px;}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .22s var(--ease),transform .22s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .section{padding:96px 0;}
}
@media (max-width:991.98px){
  .section{padding:72px 0;}
  .nav-search{display:none;}
  .btn-ghost{display:none;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;inset:72px 0 0 0;background:var(--surface);flex-direction:column;align-items:stretch;
    gap:0;padding:24px 24px 40px;overflow-y:auto;display:none;z-index:1020;
  }
  .main-nav.is-open{display:flex;}
  .main-nav .nav-item{font-size:24px;font-weight:600;color:var(--ink);padding:18px 0;border-bottom:1px solid var(--line);}
  .main-nav .nav-item::after{display:none;}
  .main-nav .nav-item.active{color:var(--brand);}
  .drawer-extra{display:block;margin-top:32px;}
  .drawer-extra .nav-search{display:flex;width:100%;}
  .drawer-extra .btn-accent{width:100%;height:52px;justify-content:center;margin-top:16px;}
  .hero-grid{grid-template-columns:7fr 5fr;gap:32px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento-large,.bento-small{grid-column:span 2;grid-row:auto;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .compare-grid{grid-template-columns:1fr;}
  .compare-divider{display:none;}
  .compare-col{padding:0;}
  .compare-col:last-child{margin-top:40px;padding-top:40px;border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767.98px){
  .container{padding:0 18px;}
  .hero{padding:48px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{order:2;}
  .hero-sub{font-size:16px;}
  .btn-primary-solid,.btn-outline-ink{width:100%;justify-content:center;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:16px;}
  .metric-card{padding:22px;}
  .bento{grid-template-columns:1fr;gap:16px;}
  .bento-large,.bento-small{grid-column:span 1;}
  .news-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .form-card{padding:24px;}
  .field-row{grid-template-columns:1fr;}
  .faq-btn{font-size:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575.98px){
  .metrics{grid-template-columns:repeat(2,1fr);}
  h1{font-size:clamp(32px,8vw,40px);}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --dark-text:#F2F1EC;
  --dark-2:#9BA5A3;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(12,20,24,.04), 0 8px 24px -12px rgba(12,20,24,.12);
  --shadow-2:0 2px 6px rgba(12,20,24,.06), 0 18px 40px -16px rgba(12,20,24,.18);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#0E7A6B;
  --bs-body-bg:#F6F5F1;
  --bs-body-color:#0C1418;
  --bs-border-color:#E4E1DA;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bs-link-color:#0E7A6B;
  --bs-link-hover-color:#0A5A50;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-feature-settings:"tnum" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  height:72px;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.nav-wrap{
  height:72px;
  display:flex;
  align-items:center;
  gap:28px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{display:inline-flex;width:28px;height:28px;}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:8px;
  flex:1 1 auto;
}
.nav-item{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 0;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .16s var(--ease);
}
.nav-item::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--brand);
  transition:width .2s var(--ease);
}
.nav-item:hover{color:var(--ink);}
.nav-item:hover::after{width:100%;}
.nav-item.active{color:var(--brand);font-weight:600;}
.nav-item.active::after{width:100%;}
.nav-item.active::before{
  content:"";
  width:4px;height:4px;border-radius:50%;
  background:var(--brand);
  display:inline-block;
}
.drawer-extra{display:none;}
.nav-tools{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:220px;
  height:40px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--surface);
  color:var(--ink-3);
  transition:width .2s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.nav-search input{
  border:0;
  outline:none;
  background:transparent;
  width:100%;
  font-size:14px;
  color:var(--ink);
  font-family:inherit;
}
.nav-search input::placeholder{color:var(--ink-3);}
.nav-search:focus-within{
  width:260px;
  border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-tint);
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:40px;
  padding:0 16px;
  border:1px solid var(--ink);
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:500;
  color:var(--ink);
  background:transparent;
  transition:background .16s var(--ease),color .16s var(--ease);
  white-space:nowrap;
}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-accent{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  height:40px;
  padding:0 18px;
  border:1px solid var(--accent);
  border-radius:var(--radius-pill);
  background:var(--accent);
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:background .16s var(--ease),border-color .16s var(--ease);
  white-space:nowrap;
}
.btn-accent:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:var(--surface);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:50%;
  width:16px;
  height:1.5px;
  background:var(--ink);
  transform:translateX(-50%);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-.75px;}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) translateY(-5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn-main{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  background:var(--brand);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:1px solid var(--brand);
  transition:background .16s var(--ease),border-color .16s var(--ease);
}
.btn-main:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;}
.btn-main .arw{transition:transform .18s var(--ease);}
.btn-main:hover .arw{transform:translateX(3px);}
.btn-line{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  background:transparent;
  color:var(--ink);
  border:1px solid var(--ink);
  font-size:15px;
  font-weight:600;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.btn-line:hover{background:var(--ink);color:#fff;}
.btn-line .arw{transition:transform .18s var(--ease);}
.btn-line:hover .arw{transform:translateX(3px);}

/* ---------- eyebrow / section heads ---------- */
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--ink-3);
  text-transform:uppercase;
  margin-bottom:16px;
}
.rule-mark{
  width:64px;
  height:4px;
  background:var(--brand);
  border-radius:2px;
  margin-bottom:24px;
}
.section{padding:96px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  padding-bottom:20px;
  border-bottom:1px solid var(--line);
  margin-bottom:48px;
}
.section-head h2{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.01em;
}
.section-head .head-note{
  font-size:14px;
  color:var(--ink-3);
  padding-bottom:6px;
  white-space:nowrap;
}

/* ---------- breadcrumb ---------- */
.crumb{
  padding-top:28px;
  font-size:13px;
  color:var(--ink-3);
}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:var(--line);}
.crumb a{color:var(--ink-3);transition:color .16s var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb .now{color:var(--ink-2);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:56px 0 96px;
  background:
    radial-gradient(rgba(14,122,107,.05) 1px, transparent 1px) 0 0/24px 24px,
    var(--paper);
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:64px;
  align-items:center;
}
.page-hero h1{
  font-size:clamp(34px,4.4vw,56px);
  line-height:1.08;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.page-hero .hero-sub{
  font-size:17px;
  color:var(--ink-2);
  max-width:520px;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:var(--ink-3);
}
.hero-meta span{display:inline-flex;align-items:center;gap:10px;}
.hero-meta span+span::before{
  content:"";
  width:3px;height:3px;border-radius:50%;
  background:var(--ink-3);
  display:inline-block;
}
.hero-media{
  position:relative;
  border-radius:18px;
  overflow:hidden;
  background:var(--brand-tint);
  box-shadow:var(--shadow-1);
  aspect-ratio:4/3;
}
.hero-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:18px;
  transition:transform .3s var(--ease);
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(14,122,107,.08);
  box-shadow:inset 0 0 0 1px rgba(12,20,24,.08);
  border-radius:18px;
  pointer-events:none;
}
.hero-chip{
  position:absolute;
  left:20px;
  bottom:20px;
  background:var(--surface);
  border-radius:var(--radius-sm);
  padding:12px 16px;
  box-shadow:var(--shadow-1);
  line-height:1.3;
}
.hero-chip b{
  display:block;
  font-size:16px;
  font-weight:800;
  color:var(--accent);
}
.hero-chip span{font-size:12px;color:var(--ink-3);}

/* ---------- steps list (image + numbered list) ---------- */
.steps-layout{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:64px;
  align-items:start;
}
.steps-figure{
  position:sticky;
  top:104px;
  border-radius:18px;
  overflow:hidden;
  background:var(--brand-tint);
  box-shadow:var(--shadow-1);
  aspect-ratio:4/5;
}
.steps-figure img{width:100%;height:100%;object-fit:cover;}
.steps-list{display:flex;flex-direction:column;}
.step-row{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:24px;
  padding:28px 0;
  border-top:1px solid var(--line);
  transition:transform .18s var(--ease);
}
.step-row:last-child{border-bottom:1px solid var(--line);}
.step-row:hover{transform:translateY(-3px);}
.step-num{
  font-size:32px;
  font-weight:800;
  line-height:1.1;
  color:var(--brand);
  letter-spacing:-.02em;
  font-feature-settings:"tnum" 1;
}
.step-body h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:8px;
  line-height:1.4;
}
.step-body p{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:760px;
}
.step-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.06em;
  padding:4px 10px;
  border-radius:10px;
  background:var(--brand-tint);
  color:var(--brand);
  border:1px solid rgba(14,122,107,.14);
}
.tag-plain{
  background:transparent;
  color:var(--ink-3);
  border-color:var(--line);
}

/* ---------- notice band ---------- */
.notice{
  background:var(--brand-tint);
  border-radius:16px;
  padding:40px 44px;
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:32px;
}
.notice-item .n-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:600;
  margin-bottom:10px;
  color:var(--brand-deep);
}
.notice-item .n-title i{font-size:15px;color:var(--brand);}
.notice-item p{font-size:15px;line-height:1.8;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion-item{
  border:0;
  border-top:1px solid var(--line);
  background:transparent;
}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-header{margin:0;}
.accordion-button{
  width:100%;
  background:transparent;
  border:0;
  box-shadow:none;
  padding:20px 0 20px 0;
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  text-align:left;
  position:relative;
  transition:color .16s var(--ease);
}
.accordion-button::before{
  content:"";
  position:absolute;
  left:-1px;
  top:16px;
  bottom:16px;
  width:3px;
  border-radius:3px;
  background:var(--line);
  transition:background .18s var(--ease);
}
.accordion-button:not(.collapsed)::before{background:var(--brand);}
.accordion-button:not(.collapsed){color:var(--brand-deep);}
.accordion-button:focus{box-shadow:none;outline:none;}
.accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.accordion-button::after{display:none;}
.faq-icon{
  position:relative;
  width:18px;height:18px;
  flex:0 0 18px;
  transition:transform .22s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--brand);
  transform:translate(-50%,-50%);
  border-radius:2px;
}
.faq-icon::before{width:14px;height:1.6px;}
.faq-icon::after{width:1.6px;height:14px;}
.accordion-button:not(.collapsed) .faq-icon{transform:rotate(45deg);}
.accordion-body{
  padding:0 0 24px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-2);
  max-width:760px;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--dark);
  border-radius:20px;
  padding:56px 56px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:40px;
  align-items:center;
  color:var(--dark-text);
}
.cta-band h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.25;
  margin-bottom:12px;
  color:var(--dark-text);
}
.cta-band p{
  font-size:15px;
  color:var(--dark-2);
  max-width:640px;
}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.btn-on-dark{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  background:var(--accent);
  border:1px solid var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  transition:background .16s var(--ease),border-color .16s var(--ease);
}
.btn-on-dark:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.btn-on-dark-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  background:transparent;
  border:1px solid rgba(255,255,255,.32);
  color:var(--dark-text);
  font-size:15px;
  font-weight:600;
  transition:background .16s var(--ease),border-color .16s var(--ease);
}
.btn-on-dark-ghost:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.6);color:#fff;}

/* ---------- cross links ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.cross-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.cross-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);}
.cross-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--brand-tint);
}
.cross-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .3s var(--ease);
}
.cross-card:hover .cross-thumb img{transform:scale(1.04);}
.cross-body{padding:24px;}
.cross-body .badge-cat{
  display:inline-block;
  font-size:12px;
  padding:4px 10px;
  border-radius:10px;
  background:var(--brand-tint);
  color:var(--brand);
  margin-bottom:12px;
}
.cross-body h3{
  font-size:18px;
  font-weight:600;
  line-height:1.45;
  margin-bottom:8px;
}
.cross-body p{
  font-size:14px;
  line-height:1.75;
  color:var(--ink-2);
  margin-bottom:14px;
}
.cross-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
}
.cross-card:hover .cross-more .arw{transform:translateX(3px);}
.cross-more .arw{transition:transform .18s var(--ease);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .22s var(--ease),transform .22s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark);
  color:var(--dark-text);
  padding:64px 0 32px;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-text{color:var(--dark-text);font-size:17px;font-weight:700;}
.footer-desc{
  font-size:13px;
  line-height:1.85;
  color:var(--dark-2);
  max-width:320px;
}
.footer-title{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--dark-2);
  margin-bottom:18px;
}
.footer-list li{margin-bottom:10px;}
.footer-list a,
.footer-list span{
  font-size:14px;
  color:rgba(242,241,236,.8);
  transition:color .16s var(--ease);
}
.footer-list a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding-top:24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--dark-2);
}
.foot-right{display:flex;gap:20px;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-item{gap:4px;}
  .main-nav{gap:20px;}
}
@media (max-width:991.98px){
  .nav-search{width:180px;}
  .main-nav{
    position:fixed;
    inset:72px 0 0 0;
    background:var(--surface);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px;
    margin:0;
    transform:translateX(-100%);
    transition:transform .24s var(--ease);
    overflow-y:auto;
    z-index:1030;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav .nav-item{
    font-size:24px;
    font-weight:600;
    padding:16px 0;
    border-bottom:1px solid var(--line);
  }
  .main-nav .nav-item::after{display:none;}
  .main-nav .nav-item.active{color:var(--brand);}
  .drawer-extra{
    display:flex;
    flex-direction:column;
    gap:14px;
    margin-top:24px;
  }
  .drawer-extra .nav-search{width:100%;}
  .drawer-extra .btn-accent{width:100%;height:48px;border-radius:var(--radius-btn);}
  .nav-tools > .nav-search,
  .nav-tools > .btn-ghost,
  .nav-tools > .btn-accent{display:none;}
  .nav-toggle{display:inline-block;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .page-hero{padding:40px 0 72px;}
  .steps-layout{grid-template-columns:1fr;gap:40px;}
  .steps-figure{position:static;aspect-ratio:16/9;}
  .notice{grid-template-columns:1fr;gap:28px;padding:32px;}
  .cta-band{grid-template-columns:1fr;padding:40px 32px;}
  .cross-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .section{padding:72px 0;}
}
@media (max-width:767.98px){
  .cross-grid{grid-template-columns:1fr;}
}
@media (max-width:575.98px){
  .container{padding-left:18px;padding-right:18px;}
  .brand-text{font-size:15px;}
  .page-hero h1{font-size:clamp(28px,8vw,36px);}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px;}
  .section-head .head-note{white-space:normal;}
  .step-row{grid-template-columns:48px 1fr;gap:16px;}
  .step-num{font-size:26px;}
  .hero-actions .btn-main,
  .hero-actions .btn-line{width:100%;justify-content:center;}
  .cta-band{padding:32px 22px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions a{width:100%;justify-content:center;}
  .notice{padding:24px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{margin-top:64px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --dark-text:#F2F1EC;
  --dark-muted:#9BA5A3;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --r-card:16px;
  --r-inner:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,20,24,.04),0 8px 24px -12px rgba(12,20,24,.12);
  --sh-2:0 2px 6px rgba(12,20,24,.06),0 18px 40px -16px rgba(12,20,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#0E7A6B;
  --bs-body-bg:#F6F5F1;
  --bs-body-color:#0C1418;
  --bs-border-color:#E4E1DA;
  --bs-body-font-family:var(--font-sans);
  --bs-link-color:#0E7A6B;
  --bs-link-hover-color:#0A5A50;
  --bs-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-feature-settings:"tnum" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--paper);
  transition:background .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px;position:relative}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;transition:opacity .2s var(--ease)}
.brand-mark{display:inline-flex;width:28px;height:28px}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:4px}
.nav-item{
  position:relative;padding:6px 0;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .18s var(--ease);
}
.nav-item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-item:hover{color:var(--ink)}
.nav-item:hover::after{transform:scaleX(1)}
.nav-item.active{color:var(--brand)}
.nav-item.active::after{transform:scaleX(1)}
.nav-item.active::before{
  content:"";position:absolute;left:-12px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--brand);transform:translateY(-50%);
}
.nav-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--surface);color:var(--ink-3);
  transition:width .2s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search input{
  border:0;background:transparent;width:100%;font-size:14px;color:var(--ink);
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{outline:none}
.nav-search:focus-within{
  width:260px;border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-tint);
}
.btn-ghost{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;
  border:1px solid var(--ink);border-radius:var(--r-btn);
  font-size:14px;font-weight:500;color:var(--ink);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-accent{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 20px;
  background:var(--accent);color:#fff;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;
  transition:background .18s var(--ease);
}
.btn-accent:hover{background:var(--accent-deep);color:#fff}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:16px;height:1.5px;background:var(--ink);transform:translateX(-50%);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";left:0;transform:none;top:-6px}
.nav-toggle span::after{content:"";left:0;transform:none;top:6px}
.drawer-extra{display:none}

/* ============ 面包屑 ============ */
.crumb-wrap{padding-top:32px}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);
}
.crumb a{color:var(--ink-3);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--line)}
.crumb .crumb-current{color:var(--ink-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-head{padding:28px 0 0}
.head-inner{max-width:900px}
.badge-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  background:var(--brand-tint);color:var(--brand);
  font-size:12px;font-weight:600;letter-spacing:.06em;border-radius:var(--r-btn);
}
.article-head h1{
  margin:20px 0 0;
  font-size:clamp(30px,3.6vw,44px);
  line-height:1.22;font-weight:800;letter-spacing:-.02em;color:var(--ink);
  position:relative;padding-top:22px;
}
.article-head h1::before{
  content:"";position:absolute;top:0;left:0;width:64px;height:4px;border-radius:2px;background:var(--brand);
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;
  font-size:13px;color:var(--ink-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.meta-divider{height:1px;background:var(--line);margin-top:32px}

/* ============ 文章主体布局 ============ */
.article-main{padding:56px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:56px;align-items:start}
.article-col{min-width:0}
.article-body{
  max-width:760px;font-size:17px;line-height:1.95;color:var(--ink-2);
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;margin:2.2em 0 .9em;padding-left:16px;
  font-size:24px;line-height:1.4;font-weight:700;color:var(--ink);letter-spacing:-.01em;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--brand);
}
.article-body h3{margin:1.7em 0 .6em;font-size:19px;font-weight:600;color:var(--ink)}
.article-body h4{margin:1.4em 0 .5em;font-size:17px;font-weight:600;color:var(--ink)}
.article-body p{margin:0 0 1.2em}
.article-body a{
  color:var(--brand);
  background-image:linear-gradient(var(--brand),var(--brand));
  background-size:0 1px;background-position:0 100%;background-repeat:no-repeat;
  transition:background-size .2s var(--ease),color .2s var(--ease);
}
.article-body a:hover{background-size:100% 1px;color:var(--brand-deep)}
.article-body ul{margin:0 0 1.2em;padding-left:1.25em}
.article-body ul li{margin-bottom:.5em;list-style:disc}
.article-body ol{margin:0 0 1.2em;padding-left:0;list-style:none;counter-reset:li}
.article-body ol > li{position:relative;margin-bottom:.6em;padding-left:32px;counter-increment:li}
.article-body ol > li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:0;color:var(--brand);font-weight:700;font-size:15px;
}
.article-body blockquote{
  margin:1.6em 0;padding:16px 22px;
  border-left:3px solid var(--brand);background:var(--brand-tint);
  border-radius:0 var(--r-inner) var(--r-inner) 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-inner);margin:1.4em 0 .6em;height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:8px;font-size:13px;color:var(--ink-3);text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line)}
.article-body thead th{font-weight:600;color:var(--ink);border-bottom:1px solid var(--ink)}
.article-body tbody tr:nth-child(even){background:#F1F0EC}
.article-body code{background:#F1F0EC;border-radius:6px;padding:2px 6px;font-size:.92em}
.article-body pre{
  background:var(--dark);color:var(--dark-text);border-radius:var(--r-inner);
  padding:18px;overflow:auto;margin:1.6em 0;font-size:14px;
}
.article-body pre code{background:transparent;padding:0;color:inherit}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-body strong{color:var(--ink);font-weight:600}

/* 目录 */
.article-toc{
  position:sticky;top:96px;align-self:start;
  border-left:1px solid var(--line);padding-left:18px;
}
.article-toc[hidden]{display:none !important}
.toc-title{font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-bottom:14px}
.toc-list{list-style:none;font-size:13px}
.toc-list a{
  display:block;padding:7px 0 7px 14px;margin-left:-19px;
  border-left:2px solid transparent;color:var(--ink-3);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc-list a:hover{color:var(--ink-2)}
.toc-list a.active{color:var(--brand);border-left-color:var(--brand)}

/* 空态 */
.empty-block{
  max-width:760px;padding:48px 32px;text-align:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.empty-block h2{margin:18px 0 8px;font-size:22px;font-weight:700;color:var(--ink)}
.empty-block p{font-size:15px;color:var(--ink-2);margin-bottom:24px}

/* 标签行 */
.article-tags{
  max-width:760px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
}
.tag-label{font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  font-size:13px;color:var(--ink-2);background:var(--surface);
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-tint)}

/* 上下篇 */
.post-nav{max-width:760px;display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:48px}
.post-nav-card{
  display:block;padding:22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-nav-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D7D3C9}
.pn-label{display:block;font-size:12px;letter-spacing:.12em;color:var(--ink-3)}
.pn-title{display:block;margin-top:10px;font-size:16px;font-weight:600;color:var(--ink);line-height:1.55}
.pn-arrow{display:inline-block;margin-top:14px;color:var(--brand);font-size:15px;transition:transform .18s var(--ease)}
.post-nav-card:hover .pn-arrow{transform:translateX(3px)}

/* 相关推荐 */
.related{margin-top:80px}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:16px;border-bottom:1px solid var(--line);
}
.sec-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink);letter-spacing:-.01em}
.more-link{font-size:14px;color:var(--ink-2);display:inline-flex;gap:6px;transition:color .18s var(--ease)}
.more-link:hover{color:var(--brand)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.news-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.nc-cover{overflow:hidden;border-radius:var(--r-inner);background:var(--brand-tint);aspect-ratio:16/9}
.nc-cover img{width:100%;height:100%;object-fit:cover;transition:transform .2s var(--ease)}
.news-card:hover .nc-cover img{transform:scale(1.04)}
.img-fallback{opacity:0}
.nc-badge{
  align-self:flex-start;margin-top:16px;padding:4px 10px;
  background:var(--brand-tint);color:var(--brand);
  font-size:12px;font-weight:600;border-radius:var(--r-btn);
}
.nc-title{margin-top:12px;font-size:18px;line-height:1.5;font-weight:600;color:var(--ink)}
.nc-desc{margin-top:8px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.nc-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}
.nc-foot .arw{color:var(--brand);transition:transform .18s var(--ease)}
.news-card:hover .nc-foot .arw{transform:translateX(3px)}

/* CTA 条 */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  margin-top:80px;padding:36px 40px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.cta-strip h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink)}
.cta-strip p{margin-top:10px;font-size:15px;color:var(--ink-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 按钮 */
.btn-brand{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
  background:var(--brand);border:1px solid var(--brand);border-radius:var(--r-btn);
  color:#fff;font-size:15px;font-weight:600;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.btn-brand:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff}
.btn-brand .arw{transition:transform .18s var(--ease)}
.btn-brand:hover .arw{transform:translateX(3px)}
.btn-line{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);
  color:var(--ink);font-size:15px;font-weight:600;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.btn-line:hover{border-color:var(--ink)}

/* 页脚 */
.site-footer{background:var(--dark);color:var(--dark-text);margin-top:120px;padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-text{color:var(--dark-text)}
.footer-desc{margin-top:18px;max-width:320px;font-size:13px;line-height:1.9;color:var(--dark-muted)}
.footer-title{font-size:12px;letter-spacing:.12em;color:var(--dark-muted);margin-bottom:18px}
.footer-list{list-style:none}
.footer-list li{margin-bottom:10px}
.footer-list a,.footer-list span{font-size:14px;color:var(--dark-text);opacity:.8;transition:opacity .18s var(--ease)}
.footer-list a:hover{opacity:1;text-decoration:underline}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:var(--dark-muted);
}
.foot-right{display:flex;gap:20px;flex-wrap:wrap}

/* 进场动效 */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .2s var(--ease),transform .2s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-toc{display:none !important}
}
@media (max-width:991px){
  .container{padding-left:20px;padding-right:20px}
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;padding:24px 24px 48px;
    background:#fff;overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
    box-shadow:0 24px 40px -24px rgba(12,20,24,.2);
  }
  .main-nav.open{opacity:1;visibility:visible;transform:none}
  .nav-item{font-size:24px;font-weight:600;color:var(--ink);padding:14px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-item::after{display:none}
  .nav-item.active{color:var(--brand)}
  .nav-item.active::before{left:auto;right:0;top:50%;width:6px;height:6px}
  .drawer-extra{display:flex;flex-direction:column;gap:16px;width:100%;margin-top:28px}
  .drawer-extra .nav-search{width:100%}
  .drawer-extra .btn-accent{justify-content:center;height:48px;font-size:16px;width:100%}
  .nav-tools .btn-ghost,.nav-tools .btn-accent{display:none}
  .nav-tools .nav-search{width:44px;padding:0;justify-content:center;overflow:hidden}
  .nav-tools .nav-search input{width:0;padding:0}
  .nav-toggle{display:block}
  .site-header.search-open .nav-tools .nav-search{
    position:absolute;left:0;right:0;top:16px;width:auto;justify-content:flex-start;
    padding:0 16px;background:#fff;z-index:5;
  }
  .site-header.search-open .nav-tools .nav-search input{width:100%}
  .site-header.search-open .brand,
  .site-header.search-open .nav-toggle{opacity:0;pointer-events:none}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .article-main{padding-top:40px}
}
@media (max-width:767px){
  .article-head h1{font-size:28px}
  .related-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .cta-strip{padding:28px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn-brand,.cta-actions .btn-line{flex:1 1 auto;justify-content:center}
  .site-footer{margin-top:80px;padding-top:48px}
}
@media (max-width:575px){
  .container{padding-left:18px;padding-right:18px}
  .article-body{font-size:16px;line-height:1.9}
  .article-body img{width:100%}
  .crumb .crumb-current{max-width:100%;white-space:normal}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  [data-reveal]{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(12,20,24,.04), 0 8px 24px -12px rgba(12,20,24,.12);
  --sh-2:0 2px 6px rgba(12,20,24,.06), 0 18px 40px -16px rgba(12,20,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-body-bg:#F6F5F1;
  --bs-body-color:#0C1418;
  --bs-border-color:#E4E1DA;
  --bs-primary:#0E7A6B;
  --bs-primary-rgb:14,122,107;
  --bs-link-color:#0E7A6B;
  --bs-link-hover-color:#0A5A50;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bs-border-radius:10px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-feature-settings:"tnum" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button{font:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(246,245,241,.94);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(12,20,24,.03);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{display:inline-flex;width:28px;height:28px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:8px;flex:1 1 auto;}
.nav-item{
  position:relative;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
}
.nav-item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-item:hover{color:var(--ink);}
.nav-item:hover::after{transform:scaleX(1);}
.nav-item.active{color:var(--brand);font-weight:600;}
.nav-item.active::after{transform:scaleX(1);}
.nav-item.active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--brand);
}
.drawer-extra{display:none;}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);
  color:var(--ink-3);
  transition:width .22s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.nav-search svg{flex:0 0 auto;}
.nav-search input{
  border:0;outline:0;background:transparent;width:100%;
  font-size:14px;color:var(--ink);font-family:inherit;
}
.nav-search input::placeholder{color:var(--ink-3);}
.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:999px;
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-accent{background:var(--accent);color:#fff;border:1px solid var(--accent);}
.btn-accent:hover{background:var(--accent-deep);border-color:var(--accent-deep);}
.btn-accent .arrow{transition:transform .18s var(--ease);margin-left:6px;}
.btn-accent:hover .arrow{transform:translateX(3px);}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);position:relative;cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:16px;height:1.5px;background:var(--ink);
  transform:translateX(-50%);transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-.75px;}
.nav-toggle span::before{content:"";left:0;transform:none;top:-6px;}
.nav-toggle span::after{content:"";left:0;transform:none;top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0;}

/* ---------- 面包屑与 Hero ---------- */
.page-hero{
  position:relative;
  padding:48px 0 56px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(12,20,24,.05) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.5;
  mask-image:linear-gradient(to bottom,transparent,#000 45%,transparent);
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 45%,transparent);
}
.page-hero .container{position:relative;z-index:1;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:28px;}
.crumb a:hover{color:var(--brand);text-decoration:underline;}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--ink-2);}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.12em;font-weight:600;
  color:var(--brand);background:var(--brand-tint);border-radius:10px;padding:5px 10px;
}
.page-hero h1{
  position:relative;
  font-size:clamp(34px,4.6vw,58px);
  line-height:1.1;font-weight:800;letter-spacing:-.02em;
  margin:22px 0 18px;max-width:900px;
}
.page-hero h1::before{
  content:"";display:block;width:64px;height:4px;border-radius:2px;
  background:var(--brand);margin-bottom:22px;
}
.hero-lead{font-size:17px;color:var(--ink-2);max-width:760px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:0;margin-top:36px;
  border-top:1px solid var(--line);padding-top:24px;
}
.hero-stat{padding-right:32px;margin-right:32px;border-right:1px solid var(--line);}
.hero-stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.hero-stat .num{
  display:block;font-size:22px;font-weight:800;letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;color:var(--brand);
}
.hero-stat .num.accent{color:var(--accent);}
.hero-stat .lab{display:block;font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-top:2px;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-alt{background:#FFFFFF;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:32px;
}
.section-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:700;letter-spacing:-.02em;}
.section-sub{margin-top:10px;font-size:15px;color:var(--ink-2);max-width:640px;}
.text-link{
  font-size:15px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;
  white-space:nowrap;
}
.text-link:hover{color:var(--brand-deep);}
.text-link:hover .arrow{transform:translateX(3px);}
.text-link .arrow{transition:transform .18s var(--ease);}

/* ---------- 筛选标签 ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.pill{
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  font-size:14px;color:var(--ink-2);cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.pill:hover{border-color:var(--brand);color:var(--brand);}
.pill.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ---------- 版本卡片矩阵 ---------- */
.version-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.version-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.version-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D8D4CA;}
.version-card[hidden]{display:none;}
.vc-media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);}
.vc-media img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.version-card:hover .vc-media img{transform:scale(1.04);}
.vc-body{display:flex;flex-direction:column;gap:10px;padding:22px 24px 24px;flex:1;}
.vc-top{display:flex;align-items:center;gap:10px;}
.vc-num{
  font-size:20px;font-weight:800;color:var(--brand);letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
}
.vc-tag{
  font-size:12px;letter-spacing:.08em;color:var(--ink-2);
  background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:3px 9px;
}
.vc-body h3{font-size:18px;font-weight:600;line-height:1.45;}
.vc-body p{font-size:15px;line-height:1.8;color:var(--ink-2);margin:0;}
.vc-time{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums;
}
.filter-empty{
  display:none;padding:40px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:var(--surface);
}
.filter-empty.is-visible{display:block;}
.filter-empty p{font-size:15px;color:var(--ink-2);margin:0 0 6px;}
.filter-empty span{font-size:13px;color:var(--ink-3);}

/* ---------- 对照表 ---------- */
.compare-wrap{overflow-x:auto;}
.compare-table{width:100%;border-collapse:collapse;min-width:640px;}
.compare-table th,.compare-table td{
  text-align:left;padding:18px;border-bottom:1px solid var(--line);font-size:15px;vertical-align:middle;
}
.compare-table thead th{
  font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--ink-3);
  border-bottom:1px solid var(--ink);padding-top:0;
}
.compare-table tbody tr:hover{background:rgba(14,122,107,.04);}
.compare-table td:first-child{font-weight:600;color:var(--ink);}
.compare-table td:not(:first-child){color:var(--ink-2);font-variant-numeric:tabular-nums;}
.compare-table .col-best{color:var(--brand);font-weight:600;}
.compare-table .delta{color:var(--accent);font-weight:700;}
.table-note{margin-top:16px;font-size:13px;color:var(--ink-3);}

/* ---------- 更新说明两栏 ---------- */
.note-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:64px;align-items:start;}
.note-lead h2{font-size:clamp(26px,3.2vw,38px);line-height:1.2;font-weight:700;letter-spacing:-.02em;margin-bottom:18px;}
.note-lead p{font-size:16px;color:var(--ink-2);max-width:520px;}
.note-list li{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);}
.note-list li:first-child{border-top:1px solid var(--line);}
.note-idx{
  flex:0 0 auto;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--accent);
  padding-top:4px;font-variant-numeric:tabular-nums;
}
.note-list h3{font-size:17px;font-weight:600;margin-bottom:4px;}
.note-list p{font-size:15px;color:var(--ink-2);margin:0;}

/* ---------- 其它分类 ---------- */
.xlink-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.xlink-card{
  display:flex;flex-direction:column;gap:12px;padding:28px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.xlink-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--brand);}
.xlink-card .xlab{font-size:12px;letter-spacing:.12em;color:var(--brand);font-weight:600;}
.xlink-card h3{font-size:20px;font-weight:600;}
.xlink-card p{font-size:15px;color:var(--ink-2);margin:0;}
.xlink-foot{
  margin-top:auto;display:flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.xlink-card:hover .xlink-foot .arrow{transform:translateX(3px);}
.xlink-foot .arrow{transition:transform .18s var(--ease);}

/* ---------- 深色 CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  background:var(--dark);color:#F2F1EC;border-radius:20px;padding:56px;
}
.cta-band h2{color:#F2F1EC;font-size:clamp(24px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;margin-bottom:10px;}
.cta-band p{color:#9BA5A3;font-size:15px;margin:0;max-width:520px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.btn-light{
  display:inline-flex;align-items:center;height:48px;padding:0 26px;border-radius:999px;
  background:#F2F1EC;color:var(--ink);font-size:15px;font-weight:600;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-light:hover{background:#fff;color:var(--ink);}
.btn-outline-light2{
  display:inline-flex;align-items:center;height:48px;padding:0 26px;border-radius:999px;
  border:1px solid rgba(255,255,255,.35);color:#F2F1EC;font-size:15px;font-weight:600;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.btn-outline-light2:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.6);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#F2F1EC;padding:64px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{font-size:17px;font-weight:700;color:#F2F1EC;}
.footer-desc{font-size:13px;line-height:1.8;color:rgba(242,241,236,.72);max-width:320px;margin:0;}
.footer-title{font-size:12px;letter-spacing:.12em;color:#9BA5A3;margin-bottom:16px;font-weight:600;}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a{font-size:14px;color:rgba(242,241,236,.8);}
.footer-list a:hover{color:#fff;text-decoration:underline;}
.footer-list span{font-size:14px;color:rgba(242,241,236,.72);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(242,241,236,.6);
}
.foot-right{display:flex;gap:20px;flex-wrap:wrap;}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .2s var(--ease),transform .2s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
.media-fallback{background:linear-gradient(135deg,var(--brand-tint),#D8EAE5);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-wrap{gap:18px;}
  .main-nav{gap:20px;}
  .nav-item{font-size:14px;letter-spacing:0;}
  .nav-search{width:180px;}
  .section{padding:80px 0;}
}
@media (max-width:991px){
  .nav-search{width:160px;}
  .btn-ghost{display:none;}
  .section{padding:72px 0;}
  .version-grid{grid-template-columns:repeat(2,1fr);}
  .note-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:24px 24px 32px;
    background:#fff;overflow-y:auto;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    border-top:1px solid var(--line);
  }
  .main-nav.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-item{
    font-size:24px;font-weight:600;padding:16px 0;border-bottom:1px solid var(--line);
  }
  .nav-item::after{display:none;}
  .nav-item.active::before{left:auto;right:0;top:50%;width:6px;height:6px;}
  .drawer-extra{display:flex;flex-direction:column;gap:14px;margin-top:28px;}
  .drawer-extra .btn-accent{width:100%;height:48px;font-size:15px;}
  .nav-toggle{display:block;}
  .nav-tools .btn-accent{display:none;}
  .nav-tools .nav-search{
    width:40px;padding:0;justify-content:center;cursor:pointer;
  }
  .nav-tools .nav-search input{width:0;opacity:0;pointer-events:none;transition:opacity .18s var(--ease);}
  .nav-tools .nav-search.is-open{width:200px;padding:0 14px;justify-content:flex-start;}
  .nav-tools .nav-search.is-open input{width:100%;opacity:1;pointer-events:auto;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 28px;}
  .xlink-grid{grid-template-columns:1fr;}
}
@media (max-width:575px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .page-hero{padding:36px 0 44px;}
  .hero-stats{flex-direction:column;gap:20px;}
  .hero-stat{border-right:0;margin-right:0;padding-right:0;}
  .version-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions a{flex:1 1 100%;justify-content:center;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,20,24,.04),0 8px 24px -12px rgba(12,20,24,.12);
  --sh-2:0 2px 6px rgba(12,20,24,.06),0 18px 40px -16px rgba(12,20,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bs-primary:#0E7A6B;
  --bs-body-bg:#F6F5F1;
  --bs-body-color:#0C1418;
  --bs-border-color:#E4E1DA;
  --bs-link-color:#0E7A6B;
  --bs-link-hover-color:#0A5A50;
  --bs-font-sans-serif:var(--font-sans);
  --bs-border-radius:12px;
  --bs-body-font-family:var(--font-sans);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  font-feature-settings:"tnum" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--dark{background:var(--dark);color:#F2F1EC;}
.section--tint{background:var(--brand-tint);}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,245,241,.72);
  transition:background .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.main-nav{display:flex;align-items:center;gap:28px;margin:0 auto;}
.nav-item{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .18s var(--ease);white-space:nowrap;
}
.nav-item::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .2s var(--ease);
}
.nav-item:hover{color:var(--brand);}
.nav-item:hover::after{width:100%;}
.nav-item.active{color:var(--brand);font-weight:600;}
.nav-item.active::after{width:100%;}
.nav-item.active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--brand);
}
.nav-tools{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;width:220px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);
  color:var(--ink-3);transition:width .2s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.nav-search input::placeholder{color:var(--ink-3);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 18px;
  border:1px solid var(--ink);border-radius:var(--r-pill);font-size:14px;font-weight:500;
  color:var(--ink);background:transparent;transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 20px;
  background:var(--accent);color:#fff;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;border:0;transition:background .18s var(--ease);
}
.btn-accent:hover{background:var(--accent-deep);color:#fff;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:11px;width:18px;height:1.5px;background:var(--ink);border-radius:2px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:19px;}
.nav-toggle span::before{content:"";left:0;top:-6px;}
.nav-toggle span::after{content:"";left:0;top:6px;}
.drawer-extra{display:none;}

/* ============ crumbs ============ */
.crumbs{padding:24px 0 0;font-size:13px;color:var(--ink-3);}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;padding:0;}
.crumbs li{display:inline-flex;align-items:center;}
.crumbs li+li::before{content:"/";margin:0 10px;color:var(--line);}
.crumbs a{transition:color .18s var(--ease);}
.crumbs a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.crumbs [aria-current="page"]{color:var(--ink-2);}

/* ============ hero ============ */
.page-hero{
  position:relative;padding:56px 0 88px;
  background-image:radial-gradient(rgba(12,20,24,.045) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.kicker{font-size:12px;letter-spacing:.12em;color:var(--ink-3);text-transform:uppercase;}
.rule{width:64px;height:4px;background:var(--brand);border-radius:2px;margin:16px 0 24px;}
.hero-title{font-size:clamp(36px,4.8vw,58px);line-height:1.12;font-weight:800;letter-spacing:-.02em;}
.hero-title em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:18px;font-weight:500;color:var(--ink-2);margin-top:18px;}
.hero-lead{font-size:16px;color:var(--ink-2);margin-top:14px;max-width:44ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.btn-solid{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 26px;
  background:var(--brand);color:#fff;border:0;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .18s var(--ease);
}
.btn-solid:hover{background:var(--brand-deep);color:#fff;}
.btn-solid svg,.btn-line svg{transition:transform .18s var(--ease);}
.btn-solid:hover svg,.btn-line:hover svg{transform:translateX(3px);}
.btn-line{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 24px;
  border:1px solid var(--ink);border-radius:var(--r-btn);background:transparent;
  font-size:15px;font-weight:600;color:var(--ink);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.btn-line:hover{background:var(--ink);color:#fff;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;font-size:13px;color:var(--ink-3);}
.hero-meta span{position:relative;padding-left:14px;}
.hero-meta span::before{content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;border-radius:50%;background:var(--line);}
.hero-media{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-media::after{content:"";position:absolute;inset:0;background:rgba(14,122,107,.08);}
.float-chip{
  position:absolute;left:16px;bottom:16px;z-index:2;background:var(--surface);
  border-radius:var(--r-sm);padding:10px 16px;box-shadow:var(--sh-1);border:1px solid var(--line);
}
.float-chip b{display:block;font-size:16px;font-weight:800;color:var(--accent);line-height:1.2;}
.float-chip small{display:block;font-size:12px;color:var(--ink-3);}

/* ============ section head ============ */
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:44px;
}
.sec-title{font-size:clamp(25px,3vw,36px);line-height:1.24;font-weight:700;letter-spacing:-.01em;}
.sec-desc{font-size:15px;color:var(--ink-2);margin-top:12px;max-width:60ch;}
.sec-link{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;display:inline-flex;align-items:center;gap:6px;}
.sec-link:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px;}

/* ============ steps ============ */
.steps{border-bottom:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:96px minmax(0,1fr) 240px;gap:32px;align-items:start;
  padding:38px 0;border-top:1px solid var(--line);
}
.step-num{
  font-size:48px;font-weight:800;line-height:1;color:var(--brand);letter-spacing:-.02em;
}
.step-title{font-size:22px;font-weight:600;line-height:1.4;margin-bottom:10px;}
.step-text{font-size:15px;line-height:1.85;color:var(--ink-2);margin-bottom:14px;}
.step-list{list-style:none;padding:0;font-size:14px;color:var(--ink-2);}
.step-list li{position:relative;padding-left:18px;margin-bottom:6px;}
.step-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--brand-tint);border:1px solid var(--brand);
}
.step-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-sm);
  border:1px solid var(--line);
}
.step-media figcaption{font-size:12px;color:var(--ink-3);margin-top:8px;}

/* ============ prep list ============ */
.prep-list{border-bottom:1px solid var(--line);}
.prep-row{
  display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;
  padding:22px 0;border-top:1px solid var(--line);
}
.prep-key{font-size:16px;font-weight:600;position:relative;padding-left:14px;}
.prep-key::before{
  content:"";position:absolute;left:0;top:.62em;width:3px;height:16px;border-radius:2px;background:var(--brand);
}
.prep-val{font-size:15px;color:var(--ink-2);}

/* ============ table ============ */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.table-line{width:100%;min-width:620px;border-collapse:collapse;font-size:15px;}
.table-line th{
  font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--ink-3);text-align:left;
  padding:0 20px 14px 0;border-bottom:1px solid var(--line);
}
.table-line td{
  padding:20px 20px 20px 0;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top;
}
.table-line td:first-child{color:var(--ink);font-weight:600;}
.table-line tr{transition:background .18s var(--ease);}
.table-line tbody tr:hover{background:rgba(14,122,107,.035);}

.notice{
  display:flex;gap:16px;align-items:flex-start;background:var(--brand-tint);
  border-radius:var(--r-card);padding:24px 28px;margin-top:32px;
}
.notice-icon{
  flex-shrink:0;width:36px;height:36px;border-radius:10px;background:var(--surface);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.notice-title{font-size:16px;font-weight:600;margin-bottom:4px;}
.notice-text{font-size:14px;color:var(--ink-2);}

/* ============ faq ============ */
.faq .accordion-item{background:transparent;border:0;border-top:1px solid var(--line);}
.faq .accordion-item:last-child{border-bottom:1px solid var(--line);}
.faq .accordion-header{margin:0;}
.faq .accordion-button{
  position:relative;width:100%;background:transparent;border:0;box-shadow:none;
  padding:24px 48px 24px 18px;font-size:17px;font-weight:600;color:var(--ink);
  text-align:left;line-height:1.55;
}
.faq .accordion-button::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:2px;
  background:var(--line);transition:background .2s var(--ease);
}
.faq .accordion-button:not(.collapsed)::before{background:var(--brand);}
.faq .accordion-button:not(.collapsed){color:var(--ink);background:transparent;box-shadow:none;}
.faq .accordion-button:focus{box-shadow:none;}
.faq .accordion-button::after{
  content:"";position:absolute;right:12px;top:50%;width:14px;height:14px;margin:0;
  transform:translateY(-50%);
  background-image:linear-gradient(var(--ink),var(--ink)),linear-gradient(var(--ink),var(--ink));
  background-size:14px 1.5px,1.5px 14px;
  background-position:center center;
  background-repeat:no-repeat;
  transition:transform .2s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  transform:translateY(-50%) rotate(45deg);
  background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand));
}
.faq .accordion-body{
  padding:0 48px 26px 18px;font-size:15px;line-height:1.85;color:var(--ink-2);
}

/* ============ cta form ============ */
.cta-card{
  max-width:680px;margin:0 auto;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:40px;box-shadow:var(--sh-1);
}
.form-row{margin-bottom:20px;}
.form-label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;font-weight:500;}
.form-control{
  width:100%;height:48px;border:1px solid var(--line);border-radius:var(--r-btn);
  padding:0 14px;background:#fff;font-size:15px;color:var(--ink);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.form-control::placeholder{color:var(--ink-3);}
.form-control:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
textarea.form-control{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:8px;}
.form-hint{font-size:12px;color:var(--ink-3);}
.btn-submit{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
  background:var(--brand);color:#fff;border:0;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;transition:background .18s var(--ease);
}
.btn-submit:hover{background:var(--brand-deep);}
.btn-submit svg{transition:transform .18s var(--ease);}
.btn-submit:hover svg{transform:translateX(3px);}
.form-alert{
  max-width:680px;margin:0 auto 24px;padding:14px 20px;border-radius:var(--r-sm);
  font-size:14px;line-height:1.7;
}
.form-alert.ok{background:var(--brand-tint);color:var(--brand-deep);}
.form-alert.warn{background:var(--accent-tint);color:#9C3A0E;}

/* ============ cross links ============ */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cross-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.cross-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D7D3C9;}
.cross-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .2s var(--ease);}
.cross-card:hover img{transform:scale(1.04);}
.cross-body{padding:22px;}
.cross-tag{
  display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--brand);
  background:var(--brand-tint);border-radius:10px;padding:3px 10px;margin-bottom:12px;
}
.cross-title{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px;}
.cross-text{font-size:14px;color:var(--ink-2);line-height:1.75;}
.cross-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);margin-top:14px;}

/* ============ footer ============ */
.site-footer{background:var(--dark);color:#F2F1EC;padding-top:64px;padding-bottom:32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#F2F1EC;font-size:17px;font-weight:700;}
.footer-desc{font-size:13px;line-height:1.8;color:#9BA5A3;max-width:34ch;}
.footer-title{font-size:12px;letter-spacing:.12em;color:#9BA5A3;margin-bottom:18px;}
.footer-list{list-style:none;padding:0;}
.footer-list li{margin-bottom:12px;}
.footer-list a,
.footer-list span{font-size:14px;color:rgba(242,241,236,.8);transition:color .18s var(--ease);}
.footer-list a:hover{color:#F2F1EC;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:#9BA5A3;
}
.foot-right{display:flex;flex-wrap:wrap;gap:20px;}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .22s var(--ease),transform .22s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ============ responsive ============ */
@media (max-width:1199px){
  .step{grid-template-columns:84px minmax(0,1fr) 220px;gap:28px;}
}
@media (max-width:991px){
  .container{padding-left:20px;padding-right:20px;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav-tools .nav-search,.nav-tools .btn-ghost{display:none;}
  .nav-toggle{display:block;}
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;margin:0;
    background:var(--surface);flex-direction:column;align-items:flex-start;gap:0;
    padding:16px 24px 120px;overflow-y:auto;
    transform:translateX(100%);transition:transform .24s var(--ease);
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0);}
  .nav-item{width:100%;font-size:22px;font-weight:600;padding:18px 0;border-bottom:1px solid var(--line);}
  .nav-item.active::before{display:none;}
  .nav-item.active{padding-left:14px;}
  .nav-item.active::after{width:0;}
  .drawer-extra{display:flex;flex-direction:column;gap:16px;width:100%;margin-top:28px;}
  .drawer-extra .nav-search{width:100%;height:46px;}
  .drawer-extra .btn-accent{height:48px;width:100%;border-radius:var(--r-btn);font-size:16px;}
  .page-hero{padding:32px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-lead{max-width:none;}
  .step{grid-template-columns:72px minmax(0,1fr);}
  .step-media{grid-column:2;max-width:420px;}
  .prep-row{grid-template-columns:180px minmax(0,1fr);gap:24px;}
  .cross-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px;}
  .hero-title{font-size:clamp(30px,7.4vw,40px);}
  .hero-sub{font-size:16px;}
  .step{grid-template-columns:1fr;gap:16px;padding:28px 0;}
  .step-num{font-size:40px;}
  .step-media{grid-column:1;}
  .prep-row{grid-template-columns:1fr;gap:8px;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-card{padding:24px;}
  .faq .accordion-button{padding:20px 44px 20px 16px;font-size:16px;}
  .faq .accordion-body{padding:0 20px 22px 16px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575px){
  .container{padding-left:18px;padding-right:18px;}
  .brand-text{font-size:15px;}
  .hero-actions{flex-direction:column;}
  .btn-solid,.btn-line{width:100%;justify-content:center;}
  .notice{padding:20px;flex-direction:column;gap:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --paper:#F6F5F1;
  --surface:#FFFFFF;
  --ink:#0C1418;
  --ink-2:#3C4A4E;
  --ink-3:#7A888B;
  --line:#E4E1DA;
  --brand:#0E7A6B;
  --brand-deep:#0A5A50;
  --brand-tint:#E6F2EF;
  --accent:#FF6A2B;
  --accent-deep:#E85A1B;
  --accent-tint:#FFE9DF;
  --dark:#0C1418;
  --dark-ink:#F2F1EC;
  --dark-ink-2:#9BA5A3;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(12,20,24,.04),0 8px 24px -12px rgba(12,20,24,.12);
  --sh-2:0 2px 6px rgba(12,20,24,.06),0 18px 40px -16px rgba(12,20,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#0E7A6B;
  --bs-body-bg:#F6F5F1;
  --bs-body-color:#0C1418;
  --bs-border-color:#E4E1DA;
  --bs-link-color:#0E7A6B;
  --bs-link-hover-color:#0A5A50;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-feature-settings:"tnum" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(246,245,241,0);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  border-bottom-color:var(--line);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;max-width:1240px;margin:0 auto;padding:0 24px;width:100%;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{display:inline-flex;width:28px;height:28px;flex:0 0 auto;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-0.01em;color:var(--ink);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;margin:0 auto;}
.nav-item{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;transition:color .18s var(--ease);
}
.nav-item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-item:hover{color:var(--ink);}
.nav-item:hover::after{transform:scaleX(1);}
.nav-item.active{color:var(--brand);font-weight:600;}
.nav-item.active::after{transform:scaleX(1);}
.nav-item.active::before{
  content:"";position:absolute;left:-12px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--brand);transform:translateY(-50%);
}
.nav-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:40px;padding:0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  color:var(--ink-3);
  transition:width .22s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);font-family:inherit;
}
.nav-search input::placeholder{color:var(--ink-3);}
.nav-search:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.btn-ghost,.btn-accent,.btn-outline-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14px;font-weight:600;line-height:1;white-space:nowrap;
  border-radius:999px;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-ghost{height:40px;padding:0 20px;border:1px solid var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-accent{height:40px;padding:0 20px;background:var(--accent);color:#fff;border:1px solid var(--accent);}
.btn-accent:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.btn-accent .arrow{transition:transform .18s var(--ease);}
.btn-accent:hover .arrow{transform:translateX(3px);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);position:relative;cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:1.6px;background:var(--ink);border-radius:2px;
  transform:translateX(-50%);transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-0.8px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.drawer-extra{display:none;}

/* ---------- 面包屑 ---------- */
.crumb{font-size:13px;color:var(--ink-3);padding:24px 0 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li::after{content:"/";color:var(--line);}
.crumb li:last-child::after{display:none;}
.crumb a:hover{color:var(--brand);text-decoration:underline;}
.crumb .current{color:var(--ink-2);font-weight:600;}

/* ---------- 通用块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--ink-3);
  text-transform:uppercase;margin-bottom:16px;
}
.rule{width:64px;height:4px;background:var(--brand);border-radius:2px;margin-bottom:24px;}
.sec-head{position:relative;padding-bottom:20px;margin-bottom:32px;}
.sec-head::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line);}
.sec-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:700;}
.sec-head .sec-sub{font-size:15px;color:var(--ink-2);margin-top:10px;max-width:760px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
}
.link-arrow .arrow{transition:transform .18s var(--ease);}
.link-arrow:hover .arrow{transform:translateX(3px);}
.link-arrow:hover{color:var(--brand-deep);}

/* ---------- Hero（矮版） ---------- */
.cat-hero{padding:32px 0 0;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.cat-hero h1{
  font-size:clamp(34px,4.4vw,56px);line-height:1.1;font-weight:800;letter-spacing:-0.02em;
  margin:0 0 18px;
}
.cat-hero h1 .thin{display:block;font-size:clamp(20px,2.2vw,28px);font-weight:600;color:var(--ink-2);letter-spacing:0;margin-top:12px;}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:640px;margin-bottom:26px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--ink-3);}
.hero-facts span{display:inline-flex;align-items:center;gap:8px;}
.hero-facts span::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--ink-3);}
.hero-media{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);aspect-ratio:4/3;background:var(--brand-tint);}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{content:"";position:absolute;inset:0;background:rgba(14,122,107,.10);pointer-events:none;}
.hero-chip{
  position:absolute;left:16px;bottom:16px;z-index:2;
  background:#fff;border-radius:12px;padding:12px 16px;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;line-height:1.2;
}
.hero-chip b{font-size:20px;font-weight:800;color:var(--accent);}
.hero-chip span{font-size:12px;color:var(--ink-3);letter-spacing:.08em;margin-top:4px;}

/* ---------- 快速自查条 ---------- */
.checkstrip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  background:var(--brand-tint);border-radius:var(--r-card);padding:28px 32px;margin-top:48px;
}
.checkstrip .ck{display:flex;gap:14px;align-items:flex-start;}
.checkstrip .ck b{font-size:13px;color:var(--brand-deep);letter-spacing:.08em;flex:0 0 auto;padding-top:2px;}
.checkstrip .ck p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.7;}

/* ---------- 左窄右宽 3:9 ---------- */
.faq-layout{display:grid;grid-template-columns:3fr 9fr;gap:48px;align-items:start;}
.faq-index{position:sticky;top:104px;}
.index-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);}
.index-title{font-size:12px;letter-spacing:.12em;color:var(--ink-3);margin-bottom:14px;}
.index-list li{margin:0;}
.index-link{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-size:13px;color:var(--ink-2);padding:10px 10px 10px 12px;border-radius:8px;
  border-left:2px solid transparent;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.index-link i{font-style:normal;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;}
.index-link:hover{background:var(--paper);color:var(--brand);}
.index-link.active{color:var(--brand);font-weight:600;border-left-color:var(--brand);background:var(--brand-tint);}
.index-link.active i{color:var(--brand);}
.index-note{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3);line-height:1.7;}

.faq-group{margin-bottom:56px;scroll-margin-top:104px;}
.faq-group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:4px;}
.group-head h2{font-size:22px;font-weight:700;line-height:1.35;}
.group-head .group-tag{font-size:12px;letter-spacing:.12em;color:var(--ink-3);white-space:nowrap;}

/* ---------- FAQ accordion 重写 ---------- */
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--line);}
.faq-accordion .accordion-header{margin:0;border:0;}
.faq-accordion .accordion-button{
  position:relative;width:100%;background:transparent;border:0;box-shadow:none;
  padding:22px 52px 22px 18px;font-size:17px;font-weight:600;color:var(--ink);
  text-align:left;line-height:1.5;border-radius:0;
}
.faq-accordion .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:2px;
  background:var(--line);transition:background .2s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand-deep);background:transparent;box-shadow:none;}
.faq-accordion .accordion-button:not(.collapsed)::before{background:var(--brand);}
.faq-accordion .accordion-button::after{display:none;}
.faq-accordion .accordion-button:focus{box-shadow:none;}
.faq-accordion .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.faq-icon{
  position:absolute;right:8px;top:50%;margin-top:-11px;width:22px;height:22px;
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  transition:transform .2s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed) .faq-icon{transform:rotate(45deg);color:var(--accent);}
.faq-accordion .accordion-body{padding:8px 52px 24px 18px;font-size:15px;line-height:1.85;color:var(--ink-2);}
.faq-accordion .accordion-body p{margin-bottom:12px;}
.faq-accordion .accordion-body p:last-child{margin-bottom:0;}
.faq-accordion .accordion-body strong{color:var(--ink);font-weight:600;}
.faq-accordion .accordion-body ul{display:grid;gap:8px;margin:12px 0;}
.faq-accordion .accordion-body li{position:relative;padding-left:16px;}
.faq-accordion .accordion-body li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:1.5px;background:var(--brand);}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--dark);border-radius:20px;padding:48px;color:var(--dark-ink);}
.cta-band .cta-grid{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--dark-ink);margin-bottom:10px;}
.cta-band p{font-size:14px;color:var(--dark-ink-2);margin:0;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.btn-solid{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;border-radius:var(--r-btn);
  border:1px solid var(--accent);transition:background .18s var(--ease),border-color .18s var(--ease);
}
.btn-solid:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.btn-solid .arrow{transition:transform .18s var(--ease);}
.btn-solid:hover .arrow{transform:translateX(3px);}
.btn-line{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;
  background:transparent;color:var(--dark-ink);font-size:15px;font-weight:600;
  border:1px solid rgba(255,255,255,.28);border-radius:var(--r-btn);
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.btn-line:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5);color:#fff;}

/* ---------- 其它分类三卡 ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cross-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.cross-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.cross-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);border-radius:12px;margin:14px 14px 0;}
.cross-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s var(--ease);}
.cross-card:hover .cross-thumb img{transform:scale(1.04);}
.cross-body{padding:18px 22px 22px;}
.cross-tag{
  display:inline-block;font-size:12px;color:var(--brand);background:var(--brand-tint);
  border-radius:10px;padding:4px 10px;margin-bottom:12px;letter-spacing:.04em;
}
.cross-body h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:8px;}
.cross-body p{font-size:14px;color:var(--ink-2);margin:0 0 14px;}
.cross-foot{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3);}

/* ---------- 返回顶部 ---------- */
.to-top{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--ink-2);border:1px solid var(--line);background:var(--surface);
  height:44px;padding:0 20px;border-radius:999px;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.to-top:hover{border-color:var(--brand);color:var(--brand);}
.to-top-row{display:flex;justify-content:center;padding-top:8px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-ink);margin-top:96px;padding:64px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:var(--dark-ink);}
.footer-desc{font-size:13px;color:var(--dark-ink-2);line-height:1.8;max-width:300px;margin:0;}
.footer-title{font-size:12px;letter-spacing:.12em;color:var(--dark-ink-2);margin-bottom:16px;}
.footer-list li{margin-bottom:10px;}
.footer-list a,.footer-list span{font-size:14px;color:rgba(242,241,236,.8);}
.footer-list a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:var(--dark-ink-2);
}
.foot-right{display:flex;gap:20px;flex-wrap:wrap;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* ---------- 断点 ---------- */
@media (max-width:1199px){
  .nav-search{width:190px;}
}
@media (max-width:991px){
  .section{padding:72px 0;}
  .nav-wrap{height:64px;}
  .main-nav{
    position:fixed;left:0;right:0;top:64px;bottom:0;z-index:1039;
    display:flex;flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:#fff;padding:32px 24px 88px;overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  }
  .main-nav.open{opacity:1;visibility:visible;transform:none;}
  .nav-item{font-size:24px;font-weight:600;padding:16px 0;border-bottom:1px solid var(--line);}
  .nav-item::after{display:none;}
  .nav-item::before{display:none;}
  .drawer-extra{display:flex;flex-direction:column;gap:16px;margin-top:28px;}
  .drawer-extra .nav-search{width:100%;height:48px;border-radius:999px;}
  .drawer-extra .btn-accent{width:100%;height:52px;font-size:16px;border-radius:999px;}
  .nav-tools .nav-search,.nav-tools .btn-ghost,.nav-tools .btn-accent{display:none;}
  .nav-toggle{display:block;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-media{order:2;aspect-ratio:16/10;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .faq-index{position:static;}
  .index-list{display:flex;flex-wrap:wrap;gap:8px;}
  .index-link{border-left:0;border:1px solid var(--line);border-radius:999px;padding:8px 14px;}
  .index-link.active{border-color:var(--brand);}
  .cross-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-band{padding:36px 28px;}
  .checkstrip{grid-template-columns:1fr;gap:18px;padding:24px;}
}
@media (max-width:767px){
  .container,.nav-wrap{padding:0 18px;}
  .section{padding:56px 0;}
  .cat-hero{padding-top:20px;}
  .cross-grid{grid-template-columns:1fr;}
  .crumb{font-size:12px;}
  .faq-accordion .accordion-button{font-size:16px;padding:20px 44px 20px 14px;}
  .faq-accordion .accordion-body{padding:8px 14px 22px 14px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-solid,.cta-actions .btn-line{width:100%;justify-content:center;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:30px;}
  .hero-chip{padding:10px 14px;}
  .hero-chip b{font-size:17px;}
  .group-head{flex-direction:column;gap:4px;}
}