/* roulang page: index */
:root{
  --ink:#1B1E22;
  --ink-soft:#2E3238;
  --muted:#5C6269;
  --line:#DDD8CE;
  --paper:#F4F2ED;
  --paper-deep:#EBE7DE;
  --surface:#FFFFFF;
  --signal:#E9B21A;
  --signal-deep:#C9940F;
  --on-dark:#F7F5F0;
  --radius-card:6px;
  --radius-btn:4px;
  --container:1200px;
  --shadow-hover:0 18px 40px -24px rgba(27,30,34,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  overflow-x:hidden;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.2em;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--ink);color:var(--on-dark);
  padding:12px 20px;border-radius:0 0 var(--radius-btn) 0;
}
.skip-link:focus{left:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--ink);color:var(--on-dark);
  min-height:36px;display:flex;align-items:center;font-size:.8125rem;
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;}
.topbar-left{display:flex;align-items:center;gap:16px;min-width:0;}
.topbar-domain{font-weight:700;letter-spacing:.02em;}
.topbar-tip{opacity:.7;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar a{
  color:var(--on-dark);opacity:.92;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.topbar a:hover,.topbar a:focus-visible{color:var(--signal);border-bottom-color:var(--signal);}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 10px 26px -22px rgba(27,30,34,.75);
  background:rgba(244,242,237,.97);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;font-size:1.0625rem;letter-spacing:-.01em;color:var(--ink);}
.brand-mark{
  width:32px;height:32px;border-radius:50%;
  background:var(--ink);color:var(--signal);
  display:grid;place-items:center;
  font-size:.875rem;font-weight:900;letter-spacing:0;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.brand:hover .brand-mark{background:var(--signal);color:var(--ink);}
.brand-text{white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none;margin:0;padding:0;}
.nav-links a{
  position:relative;display:inline-block;
  padding:8px 0;font-size:.9375rem;font-weight:600;color:var(--ink-soft);
  transition:color .18s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);}
.nav-actions{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:var(--surface);border-radius:var(--radius-btn);
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:13px 26px;border-radius:var(--radius-btn);
  font-size:.9375rem;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--on-dark);}
.btn-primary:hover{background:var(--signal);color:var(--ink);transform:translateY(-1px);}
.btn-primary:active{background:var(--signal-deep);color:var(--ink);transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark);}
.btn-ghost:active{transform:translateY(0);}
.btn-on-dark{background:var(--signal);color:var(--ink);}
.btn-on-dark:hover{background:var(--on-dark);color:var(--ink);transform:translateY(-1px);}
.btn-sm{min-height:40px;padding:9px 18px;font-size:.875rem;}

/* ---------- 通用文字链 ---------- */
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.9375rem;font-weight:600;color:var(--ink);position:relative;
  padding-bottom:3px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.link-arrow:hover{color:var(--signal-deep);}
.link-arrow:hover::after{transform:scaleX(1);}
.link-arrow .arw{transition:transform .22s var(--ease);}
.link-arrow:hover .arw{transform:translateX(4px);}

/* ---------- 眉题与标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.8125rem;font-weight:700;letter-spacing:.14em;
  color:var(--signal-deep);
}
.eyebrow::before{content:"";width:24px;height:1px;background:currentColor;}
.section{padding:clamp(64px,9vw,120px) 0;}
.section--surface{background:var(--surface);}
.section--paper{background:var(--paper);}
.section--deep{background:var(--paper-deep);}
.section--ink{background:var(--ink);color:var(--on-dark);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:clamp(32px,4vw,52px);}
.section-head h2,.h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;line-height:1.22;letter-spacing:-.01em;margin-top:14px;}
.section-head p{max-width:420px;font-size:.9375rem;color:var(--muted);}
.section--ink .section-head p{color:rgba(247,245,240,.72);}
.section--ink .eyebrow{color:var(--signal);}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink);overflow:hidden;}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  transform:scale(1.02);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(27,30,34,.94) 0%,rgba(27,30,34,.78) 44%,rgba(27,30,34,.22) 100%);
}
.hero-lines{position:absolute;inset:0;pointer-events:none;overflow:hidden;}
.hero-lines i{position:absolute;left:0;right:0;height:1px;background:rgba(247,245,240,.08);display:block;}
.hero-lines i:nth-child(1){top:26%;}
.hero-lines i:nth-child(2){top:52%;}
.hero-lines i:nth-child(3){top:78%;}
.hero-inner{
  position:relative;z-index:2;
  display:flex;flex-direction:column;justify-content:center;
  min-height:640px;padding:100px 0 72px;color:var(--on-dark);
}
.hero .eyebrow{color:var(--signal);}
.hero h1{
  max-width:800px;margin-top:20px;
  font-size:clamp(2.3rem,5vw,4.1rem);
  font-weight:900;line-height:1.1;letter-spacing:-.02em;
}
.hero-sub{
  max-width:560px;margin-top:22px;
  font-size:clamp(1rem,1.4vw,1.1875rem);
  color:rgba(247,245,240,.82);line-height:1.75;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;}
.hero-actions .btn-ghost{color:var(--on-dark);border-color:rgba(247,245,240,.55);}
.hero-actions .btn-ghost:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:0;
  margin-top:56px;padding-top:26px;border-top:1px solid rgba(247,245,240,.18);
}
.metric{padding:0 34px;border-right:1px solid rgba(247,245,240,.18);}
.metric:first-child{padding-left:0;}
.metric:last-child{border-right:0;}
.metric b{
  display:block;font-size:clamp(1.7rem,2.8vw,2.35rem);
  font-weight:800;line-height:1.15;color:var(--signal);
}
.metric span{display:block;margin-top:4px;font-size:.8125rem;color:rgba(247,245,240,.72);}

/* ---------- 品牌主张 ---------- */
.claim-grid{display:grid;grid-template-columns:1fr 1.95fr;gap:clamp(32px,5vw,72px);align-items:start;}
.claim-intro p{margin-top:16px;color:var(--muted);font-size:.9375rem;max-width:300px;}
.claim-list{list-style:none;margin:0;padding:0;}
.claim-item{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:26px 0;border-top:1px solid var(--line);
}
.claim-item:last-child{border-bottom:1px solid var(--line);}
.claim-num{
  font-size:.9375rem;font-weight:800;letter-spacing:.06em;
  color:var(--signal-deep);line-height:1.6;
}
.claim-item h3{font-size:1.125rem;font-weight:700;line-height:1.5;margin-bottom:6px;}
.claim-item p{font-size:.9375rem;color:var(--muted);line-height:1.85;}

/* ---------- 故事图文 ---------- */
.story{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);align-items:center;}
.story-media{position:relative;}
.story-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);
  background:var(--paper-deep);
}
.story-media .data-card{
  position:absolute;right:-14px;bottom:-14px;
  background:var(--ink);color:var(--on-dark);
  padding:18px 22px;border-radius:var(--radius-card);min-width:172px;
}
.story-media .data-card b{display:block;font-size:1.6rem;font-weight:800;color:var(--signal);line-height:1.2;}
.story-media .data-card span{font-size:.75rem;color:rgba(247,245,240,.75);}
.story-body h2{font-size:clamp(1.6rem,3vw,2.35rem);font-weight:800;line-height:1.25;margin-top:14px;letter-spacing:-.01em;}
.story-body p{margin-top:18px;font-size:.9375rem;color:var(--muted);line-height:1.9;}
.story-body .link-arrow{margin-top:28px;}

/* ---------- 精选内容 ---------- */
.feature-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:stretch;}
.feature-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.feature-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.feature-media{display:block;overflow:hidden;background:var(--paper-deep);}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease);}
.feature-card:hover .feature-media img{transform:scale(1.03);}
.feature-body{padding:22px 24px 26px;}
.feature-body h3{font-size:1.1875rem;font-weight:700;line-height:1.5;margin-top:12px;}
.feature-body p{margin-top:10px;font-size:.9rem;color:var(--muted);line-height:1.85;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feature-side{display:grid;gap:24px;}
.feature-mini{
  display:grid;grid-template-columns:96px 1fr;gap:18px;align-items:center;
  padding:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:border-color .2s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.feature-mini:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.feature-mini img{width:96px;height:96px;object-fit:cover;border-radius:4px;background:var(--paper-deep);}
.feature-mini h3{font-size:1rem;font-weight:700;line-height:1.55;margin-top:8px;}
.feature-mini .meta{display:block;font-size:.8125rem;color:var(--muted);}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;border:1px solid var(--line);
  font-size:.75rem;font-weight:600;color:var(--ink-soft);background:transparent;
  white-space:nowrap;
}
.badge--signal{background:var(--signal);border-color:var(--signal);color:var(--ink);}

/* ---------- CMS 最新信息 ---------- */
.cms-list{border-top:1px solid var(--line);}
.cms-row{
  display:grid;grid-template-columns:104px 1fr 110px 28px;gap:22px;align-items:center;
  padding:22px 14px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.cms-row:hover{background:#FAF8F2;}
.cms-time{font-size:.8125rem;color:var(--muted);}
.cms-main h3{font-size:1.0625rem;font-weight:600;line-height:1.55;}
.cms-main h3 a{transition:color .18s var(--ease);}
.cms-main h3 a:hover{color:var(--signal-deep);}
.cms-summary{
  margin-top:6px;font-size:.875rem;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-arrow{color:var(--muted);font-size:1.125rem;text-align:right;transition:transform .2s var(--ease),color .2s var(--ease);}
.cms-row:hover .cms-arrow{transform:translateX(6px);color:var(--signal-deep);}
.cms-empty{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;color:var(--muted);background:var(--surface);
}
.cms-empty .ico{
  width:44px;height:44px;margin:0 auto 14px;border:1px solid var(--line);
  border-radius:50%;display:grid;place-items:center;color:var(--muted);font-size:1.125rem;
}
.cms-empty p{font-size:.9375rem;}
.cms-empty .link-arrow{margin-top:16px;}

/* ---------- 信任背书 ---------- */
.trust-logos{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:28px 40px;padding:26px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.trust-logos span{
  font-size:.9375rem;font-weight:700;color:var(--ink-soft);
  opacity:.6;filter:grayscale(1);
  transition:opacity .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
}
.trust-logos span:hover{opacity:1;filter:none;color:var(--ink);}
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px;}
.quote{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:30px 28px 26px;
}
.quote::before{
  content:"";position:absolute;left:28px;top:22px;width:22px;height:1px;background:var(--signal);
}
.quote p{margin-top:22px;font-size:.9375rem;line-height:1.9;color:var(--ink-soft);}
.quote .sign{margin-top:18px;font-size:.8125rem;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion{border:0;background:transparent;margin:0;}
.accordion-item{border-bottom:1px solid var(--line);}
.accordion-item:first-child{border-top:1px solid var(--line);}
.accordion-title{
  border:0;background:transparent;
  padding:22px 48px 22px 0;font-size:1.0625rem;font-weight:600;color:var(--ink);
  position:relative;transition:color .18s var(--ease);
}
.accordion-title:hover{color:var(--signal-deep);}
.accordion-title::before{display:none;}
.faq-icon{
  position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border:1px solid var(--line);border-radius:50%;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);
  transition:transform .2s var(--ease),opacity .2s var(--ease),background .2s var(--ease);
}
.faq-icon::before{width:12px;height:2px;transform:translate(-50%,-50%);}
.faq-icon::after{width:2px;height:12px;transform:translate(-50%,-50%);}
.accordion-item.is-active .faq-icon{border-color:var(--ink);background:var(--signal);}
.accordion-item.is-active .faq-icon::before,
.accordion-item.is-active .faq-icon::after{background:var(--ink);}
.accordion-item.is-active .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.accordion-content{padding:0 48px 24px 0;border:0;background:transparent;color:var(--muted);font-size:.9375rem;line-height:1.9;}
.accordion-content p{margin:0;}

/* ---------- CTA ---------- */
.cta-block{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(28px,4vw,56px);align-items:center;}
.cta-block h2{font-size:clamp(1.6rem,2.8vw,2.3rem);font-weight:800;line-height:1.28;margin-top:14px;letter-spacing:-.01em;}
.cta-block p.desc{margin-top:14px;font-size:.9375rem;color:rgba(247,245,240,.75);max-width:460px;}
.subscribe-form{display:flex;flex-wrap:wrap;gap:12px;}
.subscribe-form .field{flex:1 1 240px;min-width:0;}
.subscribe-form label{display:block;font-size:.8125rem;color:rgba(247,245,240,.72);margin-bottom:8px;}
.subscribe-form input{
  width:100%;height:48px;border-radius:var(--radius-btn);
  border:1px solid rgba(247,245,240,.32);background:rgba(255,255,255,.06);
  color:var(--on-dark);padding:0 16px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.subscribe-form input::placeholder{color:rgba(247,245,240,.45);}
.subscribe-form input:focus{
  outline:none;border-color:var(--signal);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 2px rgba(233,178,26,.35);
}
.subscribe-form .btn{height:48px;min-height:48px;flex:0 0 auto;align-self:flex-end;}
.form-note{margin-top:14px;font-size:.75rem;color:rgba(247,245,240,.6);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.15fr;gap:40px;}
.footer-brand .brand{color:var(--on-dark);}
.footer-brand .brand-mark{background:var(--on-dark);color:var(--ink);}
.footer-brand .brand:hover .brand-mark{background:var(--signal);color:var(--ink);}
.footer-brand p{margin-top:18px;font-size:.875rem;line-height:1.9;color:rgba(247,245,240,.66);max-width:320px;}
.footer-domain{margin-top:14px;font-size:.8125rem;color:rgba(247,245,240,.5);letter-spacing:.02em;}
.footer-col h3{font-size:.9375rem;font-weight:700;margin-bottom:16px;color:var(--on-dark);}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin:0;}
.footer-links a,.footer-links span{
  display:block;padding:7px 0;font-size:.875rem;
  color:rgba(247,245,240,.72);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a:hover{color:var(--signal);transform:translateX(3px);}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(247,245,240,.14);
  padding:22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:.8125rem;color:rgba(247,245,240,.6);
}
.footer-bottom a{color:rgba(247,245,240,.6);transition:color .18s var(--ease);}
.footer-bottom a:hover{color:var(--signal);}

/* ---------- 移动端抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:120;background:var(--paper);
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .32s var(--ease),opacity .28s var(--ease),visibility .28s var(--ease);
  display:flex;flex-direction:column;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;border-bottom:1px solid var(--line);min-height:72px;
}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--radius-btn);cursor:pointer;display:grid;place-items:center;
  font-size:1.125rem;color:var(--ink);
}
.drawer-close:hover{border-color:var(--ink);}
.drawer-nav{padding:8px 24px 32px;display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;font-size:1.25rem;font-weight:600;
  border-bottom:1px solid var(--line);color:var(--ink-soft);
}
.drawer-nav a.is-active{color:var(--ink);}
.drawer-nav a .arw{color:var(--muted);}
.drawer-cta{margin-top:28px;}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-inner{min-height:600px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn{display:none;}
  .claim-grid{grid-template-columns:1fr;gap:32px;}
  .claim-intro p{max-width:none;}
  .story{grid-template-columns:1fr;gap:44px;}
  .story-media .data-card{right:14px;bottom:14px;}
  .feature-grid{grid-template-columns:1fr;}
  .cms-row{grid-template-columns:88px 1fr 28px;gap:16px;}
  .cms-row .badge-cell{display:none;}
  .quote-grid{grid-template-columns:1fr;}
  .cta-block{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;}
  .section-head p{max-width:none;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .hero-inner{min-height:auto;padding:72px 0 56px;}
  .hero-metrics{flex-direction:column;gap:20px;padding-top:22px;margin-top:40px;}
  .metric{padding:0;border-right:0;border-left:2px solid rgba(247,245,240,.16);padding-left:16px;}
  .metric:first-child{padding-left:16px;}
  .hero-actions .btn{flex:1 1 auto;}
  .feature-mini{grid-template-columns:80px 1fr;gap:14px;}
  .feature-mini img{width:80px;height:80px;}
  .cms-row{grid-template-columns:1fr 24px;gap:10px;padding:20px 6px;}
  .cms-time{grid-column:1 / -1;font-size:.75rem;}
  .cms-row .badge-cell{display:none;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .topbar-tip{display:none;}
  .quote{padding:26px 22px 22px;}
  .accordion-title{font-size:1rem;padding-right:42px;}
  .accordion-content{padding-right:8px;font-size:.9rem;}
  .subscribe-form .btn{width:100%;}
}
@media (max-width:519px){
  .brand{font-size:1rem;}
  .claim-item{grid-template-columns:48px 1fr;gap:14px;}
  .story-media .data-card{position:static;margin-top:14px;display:inline-block;}
}

/* roulang page: article */
:root{
  --ink:#1B1E22;
  --ink-soft:#2E3238;
  --muted:#5C6269;
  --line:#DDD8CE;
  --paper:#F4F2ED;
  --surface:#FFFFFF;
  --signal:#E9B21A;
  --signal-deep:#C9940F;
  --on-dark:#F7F5F0;
  --radius:6px;
  --radius-sm:4px;
  --shadow-hover:0 18px 40px -24px rgba(27,30,34,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --space-block:clamp(64px,9vw,128px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--signal);color:var(--ink)}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--on-dark);padding:10px 18px;border-radius:0 0 var(--radius-sm) 0;z-index:200}
.skip-link:focus{left:0;top:0}

/* 顶部信息条 */
.topbar{background:var(--ink);color:var(--on-dark);font-size:.8125rem;line-height:36px;height:36px;overflow:hidden}
.topbar-inner{display:flex;align-items:center;gap:18px}
.topbar-domain{font-weight:700;letter-spacing:.02em}
.topbar-tip{color:rgba(247,245,240,.66);margin-right:auto;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-link{position:relative;color:var(--on-dark);transition:color .18s var(--ease)}
.topbar-link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.topbar-link:hover{color:var(--signal)}
.topbar-link:hover::after{transform:scaleX(1)}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:80;background:var(--paper);border-bottom:1px solid transparent;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 12px 30px -26px rgba(27,30,34,.75)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.0625rem;letter-spacing:-.01em}
.brand-mark{width:34px;height:34px;border-radius:var(--radius);background:var(--ink);color:var(--signal);display:grid;place-items:center;font-size:.9375rem;font-weight:800;flex:none}
.brand-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;display:inline-block;padding:8px 0;font-size:.9375rem;font-weight:600;color:var(--ink-soft);transition:color .18s var(--ease)}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink)}
.nav-toggle{display:none;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);font-size:.875rem;font-weight:600;transition:border-color .18s var(--ease),background .18s var(--ease)}
.nav-toggle:hover{border-color:var(--ink)}

/* 面包屑 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8125rem;color:var(--muted);padding:26px 0 0}
.breadcrumb a{color:var(--muted);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--signal-deep)}
.breadcrumb .sep{color:#B9B3A7}
.breadcrumb .current{color:var(--ink);font-weight:600;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章布局 */
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;justify-content:center;padding:28px 0 clamp(56px,7vw,96px)}
.article-main{min-width:0}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;border:1px solid var(--line);color:var(--ink-soft);font-size:.75rem;font-weight:600;letter-spacing:.02em;background:var(--surface)}
.badge.is-accent{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.article-title{font-size:clamp(1.9rem,4vw,3.1rem);font-weight:900;line-height:1.25;letter-spacing:-.015em;margin:16px 0 0}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:18px 0 0;font-size:.8125rem;color:var(--muted)}
.article-meta .dot{color:#C3BDB0}
.article-meta time{color:var(--muted)}
.article-divider{height:1px;background:var(--line);margin:28px 0 0}

/* 正文排版 */
.article-body{margin-top:32px;font-size:1rem;line-height:1.9;color:#25292E;word-wrap:break-word;overflow-wrap:break-word}
.article-body p{margin:0 0 1.25em}
.article-body h2{position:relative;margin:2.4em 0 .8em;padding-left:20px;font-size:clamp(1.25rem,2.4vw,1.5rem);font-weight:800;line-height:1.4;letter-spacing:-.01em;color:var(--ink)}
.article-body h2::before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;background:var(--signal)}
.article-body h3{margin:1.8em 0 .6em;font-size:1.1875rem;font-weight:700;line-height:1.5;color:var(--ink-soft)}
.article-body h4{margin:1.5em 0 .5em;font-size:1.0625rem;font-weight:700;color:var(--ink-soft)}
.article-body strong{font-weight:700;color:var(--ink)}
.article-body a{color:var(--signal-deep);border-bottom:1px solid rgba(201,148,15,.4);transition:border-color .18s var(--ease),color .18s var(--ease)}
.article-body a:hover{color:var(--ink);border-bottom-color:var(--signal)}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.4em}
.article-body ul{list-style:square}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0}
.article-body li::marker{color:var(--signal-deep)}
.article-body blockquote{margin:1.6em 0;padding:16px 22px;border-left:3px solid var(--signal);background:#EFEDE7;color:#3B4046;font-size:.9375rem}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius);margin:1.6em 0;width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:8px;font-size:.8125rem;color:var(--muted);text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.9375rem}
.article-body th{background:#EFEDE7;text-align:left;font-weight:700;color:var(--ink);padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);color:#3B4046}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

/* 空态 */
.empty-state{margin:36px 0 0;padding:56px 24px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.empty-state .empty-icon{width:48px;height:48px;margin:0 auto 18px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);font-size:1.125rem}
.empty-state p{margin:0 0 6px;font-size:1.0625rem;font-weight:700;color:var(--ink)}
.empty-state span{display:block;font-size:.875rem;color:var(--muted);margin-bottom:20px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 26px;border-radius:var(--radius-sm);font-size:.9375rem;font-weight:600;border:1px solid transparent;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .22s var(--ease),box-shadow .18s var(--ease)}
.btn-primary{background:var(--ink);color:var(--on-dark)}
.btn-primary:hover{background:var(--signal);color:var(--ink);transform:translateY(-1px)}
.btn-primary:active{background:var(--signal-deep);transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark)}
.btn-ghost:active{transform:translateY(0);background:var(--ink-soft)}
.text-link{position:relative;display:inline-flex;align-items:center;gap:8px;font-size:.9375rem;font-weight:600;color:var(--ink)}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:2px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.text-link:hover{color:var(--signal-deep)}
.text-link:hover::after{transform:scaleX(1)}
.text-link i{transition:transform .22s var(--ease)}
.text-link:hover i{transform:translateX(6px)}

/* 侧栏 */
.article-sidebar{min-width:0;align-self:start;position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.side-title{font-size:.8125rem;font-weight:700;letter-spacing:.14em;color:var(--muted);margin:0 0 14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list li+li{border-top:1px solid var(--line)}
.side-list a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;font-size:.9375rem;font-weight:600;color:var(--ink-soft);transition:color .18s var(--ease)}
.side-list a i{font-size:.75rem;color:var(--muted);transition:transform .22s var(--ease),color .18s var(--ease)}
.side-list a:hover{color:var(--ink)}
.side-list a:hover i{transform:translateX(4px);color:var(--signal-deep)}
.side-note{font-size:.8125rem;line-height:1.85;color:var(--muted);margin:0 0 16px}
.side-card .btn{width:100%}

/* 相关推荐 */
.related-section{border-top:1px solid var(--line);background:var(--surface)}
.related-inner{padding:var(--space-block) 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{font-size:clamp(1.5rem,2.8vw,2.1rem);font-weight:800;line-height:1.25;letter-spacing:-.015em}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.8125rem;font-weight:700;letter-spacing:.14em;color:var(--signal-deep);margin-bottom:12px}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--signal)}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.related-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .22s var(--ease)}
.related-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.related-thumb{aspect-ratio:16/10;background:#E7E3DA;overflow:hidden}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.related-card:hover .related-thumb img{transform:scale(1.03)}
.related-content{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-content h3{font-size:1.0625rem;font-weight:700;line-height:1.5;color:var(--ink)}
.related-content p{font-size:.875rem;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:.8125rem;color:var(--muted)}
.related-meta i{transition:transform .22s var(--ease)}
.related-card:hover .related-meta i{transform:translateX(6px);color:var(--signal-deep)}

/* 返回入口 */
.return-bar{display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px;padding:36px 0 0;margin-top:8px;border-top:1px solid var(--line)}
.return-bar .text-link{color:var(--ink-soft)}

/* 订阅 CTA */
.cta-band{background:var(--ink);color:var(--on-dark)}
.cta-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;padding:clamp(48px,7vw,88px) 0}
.cta-inner h2{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:800;line-height:1.3;letter-spacing:-.015em;color:var(--on-dark)}
.cta-inner p{margin-top:14px;font-size:.9375rem;line-height:1.85;color:rgba(247,245,240,.72);max-width:44ch}
.subscribe-form{display:flex;flex-wrap:wrap;gap:12px}
.subscribe-form label{display:block;width:100%;font-size:.8125rem;color:rgba(247,245,240,.7);margin-bottom:2px}
.subscribe-form input{flex:1 1 220px;min-height:48px;padding:0 16px;border-radius:var(--radius-sm);border:1px solid rgba(247,245,240,.28);background:rgba(255,255,255,.06);color:var(--on-dark);font-size:.9375rem;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.subscribe-form input::placeholder{color:rgba(247,245,240,.45)}
.subscribe-form input:focus{outline:none;border-color:var(--signal);box-shadow:0 0 0 2px rgba(233,178,26,.35)}
.subscribe-form .btn{background:var(--signal);color:var(--ink);border-color:var(--signal)}
.subscribe-form .btn:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark)}
.form-note{width:100%;font-size:.75rem;color:rgba(247,245,240,.5);margin-top:2px}

/* 页脚 */
.site-footer{background:var(--ink);color:var(--on-dark);padding:clamp(48px,7vw,80px) 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{color:var(--on-dark);margin-bottom:18px}
.footer-brand .brand-mark{background:rgba(247,245,240,.1);color:var(--signal)}
.footer-brand p{font-size:.875rem;line-height:1.85;color:rgba(247,245,240,.66);max-width:34ch}
.footer-domain{margin-top:16px;font-size:.8125rem;letter-spacing:.06em;color:rgba(247,245,240,.42)}
.footer-col h3{font-size:.8125rem;font-weight:700;letter-spacing:.14em;color:rgba(247,245,240,.55);margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a,.footer-links span{font-size:.875rem;color:rgba(247,245,240,.72);transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--signal)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:48px;padding:20px 0 26px;border-top:1px solid rgba(247,245,240,.14);font-size:.8125rem;color:rgba(247,245,240,.5)}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .nav-links{position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;padding:8px 24px 20px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 24px 40px -32px rgba(27,30,34,.8)}
  .nav-links.is-open{display:flex}
  .nav-links a{padding:14px 0;font-size:1.0625rem;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:0}
  .nav-links a::after{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:44px}
  .article-sidebar{position:static;top:auto}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .topbar-tip{display:none}
  .topbar-inner{gap:12px}
  .related-grid{grid-template-columns:minmax(0,1fr);gap:18px}
  .article-body{font-size:1rem;line-height:1.85}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .breadcrumb .current{max-width:180px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:519px){
  .article-title{font-size:1.75rem}
  .brand-text{font-size:.9375rem}
  .nav-toggle span{display:none}
  .nav-toggle{padding:0 12px}
  .empty-state{padding:40px 18px}
  .side-card{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#1B1E22;
  --ink-soft:#2E3238;
  --muted:#5C6269;
  --line:#DDD8CE;
  --paper:#F4F2ED;
  --surface:#FFFFFF;
  --signal:#E9B21A;
  --signal-deep:#C9940F;
  --on-dark:#F7F5F0;
  --radius-card:6px;
  --radius-btn:4px;
  --shadow-hover:0 18px 40px -24px rgba(27,30,34,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
h1,h2,h3,h4{font-family:inherit;color:var(--ink);letter-spacing:-0.01em;}
ul,ol{padding:0;list-style:none;}
a{color:var(--ink);text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--signal-deep);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.grid-x{margin-left:-12px;margin-right:-12px;}
.grid-x > .cell{padding-left:12px;padding-right:12px;}

/* 跳转链接 */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:9999;
  background:var(--ink);color:var(--on-dark);
  padding:10px 18px;border-radius:0 0 var(--radius-btn) 0;
}
.skip-link:focus{left:0;color:var(--on-dark);}

/* 顶部信息条 */
.topbar{
  background:var(--ink);
  color:var(--on-dark);
  font-size:0.8125rem;
  line-height:1;
}
.topbar .container{
  min-height:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:8px;
  padding-bottom:8px;
}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0;}
.topbar-domain{
  font-weight:600;
  letter-spacing:0.04em;
  color:var(--on-dark);
  white-space:nowrap;
}
.topbar-sep{width:1px;height:12px;background:rgba(247,245,240,.28);}
.topbar-tip{color:rgba(247,245,240,.72);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-link{
  color:var(--on-dark);
  border-bottom:1px solid rgba(247,245,240,.35);
  padding-bottom:2px;
  white-space:nowrap;
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.topbar-link:hover{color:var(--signal);border-color:var(--signal);}

/* 主导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 10px 24px -22px rgba(27,30,34,.55);
}
.nav-inner{
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);
  color:var(--signal);
  font-weight:800;
  font-size:1rem;
  border-radius:4px;
  letter-spacing:0;
}
.brand-text{
  font-size:1.0625rem;
  font-weight:800;
  letter-spacing:0.01em;
  color:var(--ink);
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:0.9375rem;
  font-weight:600;
  color:var(--ink-soft);
  white-space:nowrap;
  transition:color 180ms var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-6px;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 220ms var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after,
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);font-weight:700;}
.nav-actions{display:flex;align-items:center;gap:12px;}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:12px 26px;
  border-radius:var(--radius-btn);
  font-size:0.9375rem;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-primary{background:var(--ink);color:var(--on-dark);border-color:var(--ink);}
.btn-primary:hover{background:var(--signal);color:var(--ink);border-color:var(--signal);transform:translateY(-1px);}
.btn-primary:active{background:var(--signal-deep);color:var(--ink);border-color:var(--signal-deep);transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px);}
.btn-ghost:active{background:var(--ink-soft);border-color:var(--ink-soft);color:var(--on-dark);transform:translateY(0);}
.btn-light{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.btn-light:hover{background:var(--signal);color:var(--ink);border-color:var(--signal);transform:translateY(-1px);}
.btn-light:active{background:var(--signal-deep);border-color:var(--signal-deep);transform:translateY(0);}

/* 文字链 */
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  font-size:0.9375rem;
  color:var(--ink);
  position:relative;
  padding-bottom:3px;
}
.link-arrow::before{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:100%;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 220ms var(--ease);
}
.link-arrow:hover::before{transform:scaleX(1);}
.link-arrow .arrow{transition:transform 220ms var(--ease);}
.link-arrow:hover .arrow{transform:translateX(6px);}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:border-color 180ms var(--ease),background 180ms var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);}
.nav-toggle-bars{position:relative;width:18px;height:2px;background:var(--ink);display:block;transition:background 180ms var(--ease);}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;background:var(--ink);
  transition:transform 220ms var(--ease),top 220ms var(--ease);
}
.nav-toggle-bars::before{top:-6px;}
.nav-toggle-bars::after{top:6px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg);}

/* 页头 */
.page-head{
  position:relative;
  background-color:var(--ink);
  background-size:cover;
  background-position:center;
  color:var(--on-dark);
  overflow:hidden;
}
.page-head::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(27,30,34,.92) 0%,rgba(27,30,34,.72) 52%,rgba(27,30,34,.3) 100%);
}
.page-head .container{
  position:relative;
  z-index:1;
  padding-top:clamp(40px,6vw,64px);
  padding-bottom:clamp(40px,6vw,64px);
  min-height:clamp(260px,32vw,330px);
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
  gap:18px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-size:0.8125rem;
  letter-spacing:0.14em;
  color:var(--signal);
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:24px;height:1px;
  background:var(--signal);
  display:inline-block;
}
.page-head h1{
  color:var(--on-dark);
  font-size:clamp(2rem,4.4vw,3.4rem);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-0.02em;
  max-width:760px;
}
.page-head p{
  color:rgba(247,245,240,.82);
  font-size:clamp(0.9375rem,1.6vw,1.0625rem);
  max-width:620px;
  line-height:1.75;
}
.page-head .link-arrow{color:var(--on-dark);}
.page-head .link-arrow:hover{color:var(--signal);}

/* 吸顶锚点导航 */
.anchor-bar{
  position:sticky;
  top:var(--header-h);
  z-index:60;
  background:rgba(244,242,237,.97);
  border-bottom:1px solid var(--line);
  opacity:0;
  transform:translateY(-8px);
  pointer-events:none;
  visibility:hidden;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms var(--ease);
}
.anchor-bar.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;visibility:visible;}
.anchor-list{
  display:flex;
  align-items:center;
  gap:10px;
  overflow-x:auto;
  padding:12px 0;
  scrollbar-width:none;
}
.anchor-list::-webkit-scrollbar{display:none;}
.anchor-list a{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:0.8125rem;
  font-weight:600;
  color:var(--ink-soft);
  white-space:nowrap;
  background:var(--surface);
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.anchor-list a:hover{background:var(--ink);color:var(--on-dark);border-color:var(--ink);}

/* 通用板块 */
.section{padding-top:clamp(56px,7vw,96px);padding-bottom:clamp(56px,7vw,96px);}
.section + .section{border-top:1px solid var(--line);}
.section-alt{background:var(--surface);}
.section-head{max-width:760px;margin-bottom:clamp(32px,4vw,48px);}
.section-head h2{
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  line-height:1.24;
  margin-top:14px;
}
.section-head p{
  margin-top:16px;
  color:var(--muted);
  font-size:1rem;
  line-height:1.85;
  max-width:680px;
}

/* 图文双栏 */
.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.split.reverse .split-media{order:2;}
.split-media{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:#E9E5DC;
  aspect-ratio:4 / 3;
}
.split-media img{
  width:100%;height:100%;
  object-fit:cover;
}
.split-media .media-tag{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(27,30,34,.9);
  color:var(--on-dark);
  font-size:0.75rem;
  font-weight:600;
  padding:6px 12px;
  border-radius:999px;
  letter-spacing:0.02em;
}
.split-body h2{
  font-size:clamp(1.5rem,2.6vw,2.1rem);
  font-weight:800;
  line-height:1.26;
  margin-bottom:18px;
}
.split-body p{
  color:var(--muted);
  font-size:1rem;
  line-height:1.9;
}
.split-body p + p{margin-top:14px;}
.spec-list{
  margin-top:26px;
  border-top:1px solid var(--line);
}
.spec-list li{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:0.9375rem;
}
.spec-list .spec-key{color:var(--muted);flex-shrink:0;}
.spec-list .spec-val{font-weight:600;color:var(--ink);text-align:right;}

/* 时间线 */
.timeline{
  position:relative;
  margin-top:8px;
  max-width:820px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:15px;
  top:8px;
  bottom:18px;
  width:1px;
  background:var(--line);
}
.timeline-item{
  position:relative;
  padding-left:56px;
  padding-bottom:34px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-dot{
  position:absolute;
  left:0;top:0;
  width:31px;height:31px;
  border-radius:999px;
  background:var(--surface);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:0.75rem;
  font-weight:800;
  color:var(--ink-soft);
  letter-spacing:0.02em;
}
.timeline-item:hover .timeline-dot{
  border-color:var(--signal);
  color:var(--ink);
  background:var(--signal);
}
.timeline-item h3{
  font-size:1.0625rem;
  font-weight:700;
  line-height:1.5;
  margin-bottom:8px;
}
.timeline-item p{
  color:var(--muted);
  font-size:0.9375rem;
  line-height:1.85;
  max-width:640px;
}

/* 参数速览块 */
.data-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.data-cell{
  background:var(--surface);
  padding:26px 22px;
  transition:background 180ms var(--ease);
}
.data-cell:hover{background:#FBF9F4;}
.data-cell .data-label{
  font-size:0.8125rem;
  color:var(--muted);
  letter-spacing:0.04em;
}
.data-cell .data-value{
  margin-top:10px;
  font-size:clamp(1.5rem,2.4vw,2rem);
  font-weight:800;
  line-height:1.15;
  color:var(--ink);
}
.data-cell .data-note{
  margin-top:10px;
  font-size:0.8125rem;
  color:var(--muted);
  line-height:1.7;
}

/* 用途卡片 */
.use-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.use-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 24px;
  transition:border-color 180ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.use-card:hover{
  border-color:var(--ink);
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.use-card .use-tag{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  border:1px solid var(--line);
  font-size:0.75rem;
  font-weight:600;
  color:var(--ink-soft);
  margin-bottom:16px;
}
.use-card h3{
  font-size:1.125rem;
  font-weight:700;
  line-height:1.45;
  margin-bottom:10px;
}
.use-card p{
  color:var(--muted);
  font-size:0.9375rem;
  line-height:1.8;
}
.use-card ul{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.use-card li{
  position:relative;
  padding-left:16px;
  color:var(--ink-soft);
  font-size:0.875rem;
  line-height:1.9;
}
.use-card li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:6px;height:6px;
  background:var(--signal);
  border-radius:1px;
}

/* FAQ */
.faq-list{
  border-top:1px solid var(--line);
  max-width:880px;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:20px 0;
  font-size:1rem;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  list-style:none;
  transition:color 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--signal-deep);}
.faq-icon{
  position:relative;
  flex-shrink:0;
  width:28px;height:28px;
  border:1px solid var(--line);
  border-radius:999px;
  transition:border-color 180ms var(--ease),background 180ms var(--ease),transform 200ms var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:10px;height:1.5px;
  background:var(--ink-soft);
  transform:translate(-50%,-50%);
  transition:transform 200ms var(--ease),background 180ms var(--ease);
}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item[open] .faq-icon{background:var(--signal);border-color:var(--signal);transform:rotate(180deg);}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(0deg);}
.faq-item[open] .faq-icon::before,
.faq-item[open] .faq-icon::after{background:var(--ink);}
.faq-answer{
  padding:0 0 22px;
  max-width:720px;
}
.faq-answer p{
  color:var(--muted);
  font-size:0.9375rem;
  line-height:1.85;
}
.faq-answer p + p{margin-top:10px;}

/* CTA 条 */
.cta-band{
  background:var(--ink);
  color:var(--on-dark);
}
.cta-band .container{
  padding-top:clamp(44px,6vw,72px);
  padding-bottom:clamp(44px,6vw,72px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{
  color:var(--on-dark);
  font-size:clamp(1.4rem,2.6vw,2rem);
  font-weight:800;
  line-height:1.3;
}
.cta-band p{
  margin-top:12px;
  color:rgba(247,245,240,.72);
  font-size:0.9375rem;
  line-height:1.8;
  max-width:560px;
}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{
  background:var(--ink);
  color:var(--on-dark);
  border-top:1px solid rgba(247,245,240,.12);
}
.site-footer .container{
  padding-top:clamp(44px,5vw,64px);
  padding-bottom:28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:clamp(24px,3vw,44px);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--signal);color:var(--ink);}
.footer-brand .brand-text{color:var(--on-dark);}
.footer-brand p{
  color:rgba(247,245,240,.66);
  font-size:0.875rem;
  line-height:1.85;
  max-width:320px;
}
.footer-domain{
  margin-top:16px;
  font-size:0.8125rem;
  letter-spacing:0.06em;
  color:rgba(247,245,240,.5);
}
.footer-col h3{
  color:var(--on-dark);
  font-size:0.9375rem;
  font-weight:700;
  margin-bottom:16px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a,
.footer-links span{
  color:rgba(247,245,240,.72);
  font-size:0.875rem;
  line-height:1.7;
  transition:color 180ms var(--ease);
}
.footer-links a:hover{color:var(--signal);}
.footer-bottom{
  margin-top:clamp(32px,4vw,48px);
  padding-top:20px;
  border-top:1px solid rgba(247,245,240,.14);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:0.8125rem;
  color:rgba(247,245,240,.55);
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 240ms var(--ease),transform 240ms var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* 响应式 */
@media (max-width:1023px){
  .nav-links{gap:20px;}
  .nav-links a{font-size:0.875rem;}
  .split{grid-template-columns:minmax(0,1fr);gap:28px;}
  .split.reverse .split-media{order:0;}
  .data-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .use-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;
    top:calc(var(--header-h) + 36px);
    left:0;right:0;
    bottom:0;
    z-index:70;
    background:var(--paper);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 20px 40px;
    overflow-y:auto;
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms var(--ease);
    border-top:1px solid var(--line);
  }
  .nav-links.is-open{opacity:1;transform:translateY(0);visibility:visible;pointer-events:auto;}
  .nav-links a{
    display:flex;
    align-items:center;
    min-height:56px;
    font-size:1.125rem;
    border-bottom:1px solid var(--line);
    padding:0;
  }
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--signal-deep);}
  .topbar-tip,.topbar-sep{display:none;}
  .data-grid{grid-template-columns:minmax(0,1fr);}
  .use-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .cta-band .container{flex-direction:column;align-items:flex-start;}
  .anchor-bar{top:var(--header-h);}
}
@media (max-width:519px){
  .container{padding-left:20px;padding-right:20px;}
  .brand-text{font-size:1rem;}
  .page-head .container{min-height:230px;}
  .timeline-item{padding-left:48px;}
  .timeline::before{left:15px;}
  .data-cell{padding:22px 18px;}
  .btn{width:100%;}
  .cta-actions{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
}
section[id]{scroll-margin-top:150px;}

/* roulang page: category2 */
:root{
  --ink:#1B1E22;
  --ink-soft:#2E3238;
  --muted:#5C6269;
  --line:#DDD8CE;
  --paper:#F4F2ED;
  --surface:#FFFFFF;
  --signal:#E9B21A;
  --signal-deep:#C9940F;
  --on-dark:#F7F5F0;
  --radius-card:6px;
  --radius-btn:4px;
  --shadow-hover:0 18px 40px -24px rgba(27,30,34,.35);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color 180ms var(--ease),background-color 180ms var(--ease),border-color 180ms var(--ease);}
a:hover{color:var(--signal-deep);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-0.01em;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--on-dark);padding:12px 20px;z-index:999;border-radius:0 0 var(--radius-btn) 0;}
.skip-link:focus{left:0;color:var(--on-dark);}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:.9375rem;font-weight:600;line-height:1.2;min-height:48px;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-primary{background:var(--ink);color:var(--on-dark);}
.btn-primary:hover{background:var(--signal);color:var(--ink);transform:translateY(-1px);}
.btn-primary:active{background:var(--signal-deep);color:var(--ink);transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark);}
.btn-ghost:active{background:var(--ink-soft);color:var(--on-dark);}
.btn-light{background:var(--on-dark);color:var(--ink);}
.btn-light:hover{background:var(--signal);color:var(--ink);transform:translateY(-1px);}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--ink);
  position:relative;padding-bottom:3px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--signal);
  transition:width 220ms var(--ease);
}
.text-link:hover::after,.text-link:focus-visible::after{width:100%;}
.text-link .arw{transition:transform 220ms var(--ease);}
.text-link:hover .arw{transform:translateX(6px);}

/* ===== 顶部信息条 ===== */
.topbar{background:var(--ink);color:var(--on-dark);font-size:.8125rem;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;min-height:36px;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0;}
.topbar-domain{letter-spacing:.08em;color:var(--on-dark);opacity:.9;}
.topbar-sep{width:1px;height:12px;background:rgba(247,245,240,.3);}
.topbar-note{color:rgba(247,245,240,.68);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-link{color:var(--on-dark);text-decoration:underline;text-underline-offset:4px;white-space:nowrap;}
.topbar-link:hover{color:var(--signal);}

/* ===== 主导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--paper);
  border-bottom:1px solid transparent;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease),background-color 220ms var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(27,30,34,.07);}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:6px;background:var(--ink);color:var(--signal);
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1rem;letter-spacing:0;flex:0 0 auto;
}
.brand-text{font-weight:800;font-size:1.0625rem;letter-spacing:.01em;color:var(--ink);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-links a{
  position:relative;font-size:.9375rem;font-weight:600;color:var(--ink-soft);
  padding:24px 0;display:inline-block;min-height:44px;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:14px;height:2px;width:0;background:var(--signal);
  transition:width 220ms var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--ink);}
.nav-links a.is-active::after{width:100%;}
.nav-cta{flex:0 0 auto;padding:12px 22px;min-height:44px;font-size:.875rem;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:var(--surface);border-radius:var(--radius-btn);align-items:center;justify-content:center;
  flex-direction:column;gap:5px;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform 220ms var(--ease),opacity 180ms var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ===== 页头 ===== */
.page-hero{
  position:relative;color:var(--on-dark);
  background-image:linear-gradient(100deg,rgba(27,30,34,.92) 0%,rgba(27,30,34,.72) 48%,rgba(27,30,34,.24) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:clamp(48px,7vw,80px) 0 clamp(40px,6vw,64px);
  min-height:340px;display:flex;align-items:center;
}
.page-hero .hero-inner{max-width:720px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:.8125rem;color:rgba(247,245,240,.7);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(247,245,240,.78);}
.breadcrumb a:hover{color:var(--signal);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--on-dark);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:.8125rem;letter-spacing:.14em;
  color:var(--signal);font-weight:600;text-transform:none;margin-bottom:16px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--signal);display:inline-block;}
.page-hero h1{
  color:var(--on-dark);
  font-size:clamp(2rem,4.6vw,3.3rem);font-weight:900;line-height:1.15;letter-spacing:-0.02em;
  margin-bottom:18px;
}
.page-hero .lead{
  font-size:clamp(1rem,1.5vw,1.125rem);color:rgba(247,245,240,.86);max-width:560px;line-height:1.75;
  margin-bottom:26px;
}
.page-hero .hero-links{display:flex;align-items:center;gap:24px;flex-wrap:wrap;}
.page-hero .text-link{color:var(--on-dark);}
.page-hero .text-link:hover{color:var(--signal);}

/* ===== 吸顶锚点导航 ===== */
.anchor-bar{
  position:sticky;top:72px;z-index:50;background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:transform 260ms var(--ease),opacity 220ms var(--ease);
}
.anchor-bar.is-hidden{transform:translateY(-140%);opacity:0;pointer-events:none;}
.anchor-scroll{
  display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:none;-ms-overflow-style:none;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:0 0 auto;display:inline-flex;align-items:center;padding:9px 18px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);
  font-size:.875rem;font-weight:600;min-height:44px;white-space:nowrap;
  transition:border-color 180ms var(--ease),background-color 180ms var(--ease),color 180ms var(--ease);
}
.anchor-pill:hover{border-color:var(--ink);color:var(--ink);background:var(--surface);}
.anchor-pill.is-current{background:var(--ink);border-color:var(--ink);color:var(--on-dark);}

/* ===== 通用板块 ===== */
.section{padding:clamp(56px,8vw,104px) 0;border-top:1px solid var(--line);}
.section.no-line{border-top:none;}
.section-head{max-width:760px;margin-bottom:clamp(28px,4vw,44px);}
.section-head .eyebrow{color:var(--signal-deep);}
.section-title{font-size:clamp(1.5rem,2.9vw,2.35rem);font-weight:800;line-height:1.22;margin-bottom:14px;}
.section-lead{color:var(--muted);font-size:1rem;line-height:1.8;max-width:660px;}
section[id]{scroll-margin-top:140px;}

/* ===== 概览数据条 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);overflow:hidden;}
.stat-cell{padding:26px 24px;border-right:1px solid var(--line);}
.stat-cell:last-child{border-right:none;}
.stat-num{font-size:clamp(1.7rem,2.6vw,2.3rem);font-weight:800;line-height:1.1;letter-spacing:-0.02em;color:var(--ink);}
.stat-num em{font-style:normal;font-size:.9375rem;font-weight:700;color:var(--muted);margin-left:2px;}
.stat-label{margin-top:8px;font-size:.8125rem;color:var(--muted);line-height:1.6;}

/* ===== 参数矩阵 ===== */
.matrix-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(24px,3.5vw,40px);align-items:start;}
.spec-table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
.spec-table caption{caption-side:top;text-align:left;font-size:.8125rem;color:var(--muted);padding:0 0 10px;}
.spec-table th,.spec-table td{padding:16px 20px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:.9375rem;line-height:1.7;}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none;}
.spec-table th{width:38%;font-weight:600;color:var(--muted);background:var(--paper);}
.spec-table td{color:var(--ink-soft);}
.spec-table td strong{color:var(--ink);font-weight:800;}
.spec-table tbody tr:hover td{background:#FBFAF6;}
.matrix-figure{position:sticky;top:150px;}
.figure-frame{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:#E8E5DE;
  aspect-ratio:3/4;
}
.figure-frame img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.figure-cap{margin-top:12px;font-size:.8125rem;color:var(--muted);line-height:1.7;}
.spec-note{
  margin-top:20px;padding:16px 18px;border-left:3px solid var(--signal);background:var(--surface);
  border-radius:0 var(--radius-card) var(--radius-card) 0;font-size:.875rem;color:var(--muted);line-height:1.75;
}

/* ===== 费用表 ===== */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);-webkit-overflow-scrolling:touch;}
.fee-table{width:100%;min-width:680px;border-collapse:collapse;font-size:.9375rem;}
.fee-table thead th{
  background:var(--paper);color:var(--ink);font-weight:700;text-align:left;
  padding:15px 18px;border-bottom:1px solid var(--line);white-space:nowrap;font-size:.875rem;
}
.fee-table td{padding:16px 18px;border-bottom:1px solid var(--line);color:var(--ink-soft);line-height:1.7;}
.fee-table tbody tr:last-child td{border-bottom:none;}
.fee-table tbody tr:hover td{background:#FBFAF6;}
.fee-table td:first-child,.fee-table th:first-child{position:sticky;left:0;background:var(--surface);font-weight:700;color:var(--ink);z-index:1;}
.fee-table thead th:first-child{background:var(--paper);}
.fee-table tbody tr:hover td:first-child{background:#FBFAF6;}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;border:1px solid var(--line);color:var(--ink-soft);font-size:.75rem;font-weight:600;white-space:nowrap;}
.tag-strong{background:var(--signal);border-color:var(--signal);color:var(--ink);}
.table-foot{margin-top:14px;font-size:.8125rem;color:var(--muted);line-height:1.7;}

/* ===== 办理流程 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);}
.step{padding:28px 24px 8px 0;border-right:1px solid var(--line);position:relative;}
.step:last-child{border-right:none;padding-right:0;}
.step::before{content:"";position:absolute;top:-1px;left:0;width:44px;height:2px;background:var(--signal);}
.step-no{font-size:.8125rem;font-weight:800;letter-spacing:.12em;color:var(--signal-deep);margin-bottom:12px;}
.step h3{font-size:1.0625rem;font-weight:700;margin-bottom:8px;line-height:1.45;}
.step p{font-size:.875rem;color:var(--muted);line-height:1.8;}

/* ===== 适用场景 ===== */
.scene-list{border-top:1px solid var(--line);}
.scene-item{
  display:grid;grid-template-columns:64px minmax(0,1fr) 180px;gap:24px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line);transition:background-color 180ms var(--ease);
}
.scene-item:hover{background:#FBFAF6;}
.scene-idx{font-size:1rem;font-weight:800;color:var(--signal-deep);letter-spacing:.06em;}
.scene-body h3{font-size:1.125rem;font-weight:700;margin-bottom:6px;line-height:1.45;}
.scene-body p{font-size:.9375rem;color:var(--muted);line-height:1.8;margin:0;}
.scene-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;}

/* ===== FAQ ===== */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;background:transparent;border:none;text-align:left;
  font-size:1rem;font-weight:600;color:var(--ink);line-height:1.6;min-height:56px;
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--signal-deep);}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--line);
  position:relative;transition:border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);border-radius:1px;
  transform:translate(-50%,-50%);transition:transform 200ms var(--ease),opacity 200ms var(--ease);
}
.faq-icon::before{width:12px;height:1.5px;}
.faq-icon::after{width:1.5px;height:12px;}
.faq-item.is-open .faq-q{color:var(--ink);}
.faq-item.is-open .faq-icon{border-color:var(--signal);background:var(--signal);}
.faq-item.is-open .faq-icon::before{background:var(--ink);}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease);}
.faq-a-inner{max-width:720px;padding:0 0 24px;font-size:.9375rem;line-height:1.85;color:var(--muted);}
.faq-a-inner p{margin-bottom:.7em;}

/* ===== CTA ===== */
.cta-band{background:var(--ink);color:var(--on-dark);padding:clamp(48px,7vw,80px) 0;}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;}
.cta-band h2{color:var(--on-dark);font-size:clamp(1.5rem,2.8vw,2.1rem);font-weight:800;line-height:1.25;margin-bottom:12px;}
.cta-band p{color:rgba(247,245,240,.76);font-size:.9375rem;line-height:1.8;margin:0;max-width:520px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-band .btn-primary{background:var(--signal);color:var(--ink);}
.cta-band .btn-primary:hover{background:var(--on-dark);color:var(--ink);}
.cta-band .btn-ghost{border-color:rgba(247,245,240,.5);color:var(--on-dark);}
.cta-band .btn-ghost:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:var(--on-dark);padding:clamp(48px,7vw,72px) 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:clamp(24px,4vw,48px);padding-bottom:44px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--on-dark);color:var(--ink);}
.footer-brand .brand-text{color:var(--on-dark);}
.footer-brand p{color:rgba(247,245,240,.68);font-size:.875rem;line-height:1.8;max-width:300px;}
.footer-domain{margin-top:16px;font-size:.8125rem;letter-spacing:.1em;color:rgba(247,245,240,.45);}
.footer-col h3{color:var(--on-dark);font-size:.9375rem;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-links span{font-size:.875rem;color:rgba(247,245,240,.72);line-height:1.6;}
.footer-links a:hover{color:var(--signal);}
.footer-bottom{
  border-top:1px solid rgba(247,245,240,.14);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:.8125rem;color:rgba(247,245,240,.55);
}

/* ===== 入场动效 ===== */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity 240ms var(--ease),transform 240ms var(--ease);}
.js .reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .js .reveal{opacity:1;transform:none;}
}
html{scroll-behavior:smooth;}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .matrix-layout{grid-template-columns:minmax(0,1fr) 260px;}
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;inset:72px 0 0 0;background:var(--paper);flex-direction:column;align-items:stretch;
    gap:0;margin:0;padding:12px 24px 32px;overflow-y:auto;
    transform:translateX(100%);transition:transform 280ms var(--ease);
    border-top:1px solid var(--line);z-index:55;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a{font-size:1.25rem;line-height:56px;min-height:56px;padding:0;border-bottom:1px solid var(--line);}
  .nav-links a::after{bottom:0;height:2px;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{gap:16px;min-height:72px;}
  .anchor-bar{top:72px;}
  .matrix-layout{grid-template-columns:1fr;}
  .matrix-figure{position:static;max-width:420px;}
  .figure-frame{aspect-ratio:16/10;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(2){border-right:none;}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step:nth-child(2){border-right:none;}
  .step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:8px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .scene-item{grid-template-columns:48px minmax(0,1fr);gap:16px;}
  .scene-tags{grid-column:1 / -1;justify-content:flex-start;padding-left:64px;}
  .cta-inner{grid-template-columns:1fr;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .topbar-note,.topbar-sep{display:none;}
  .page-hero{min-height:0;padding:36px 0 40px;background-position:right center;}
  .page-hero h1{font-size:clamp(1.75rem,7vw,2.3rem);}
  .section{padding:48px 0;}
  .spec-table th,.spec-table td{padding:14px 14px;font-size:.875rem;}
  .spec-table th{width:42%;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:none;border-bottom:1px solid var(--line);padding:24px 0;}
  .step:last-child{border-bottom:none;}
  .step:nth-child(1),.step:nth-child(2){padding-bottom:24px;margin-bottom:0;}
  .scene-item{padding:22px 0;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:519px){
  .stat-grid{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line);}
  .stat-cell:last-child{border-bottom:none;}
  .brand-text{font-size:1rem;}
  .anchor-pill{padding:8px 14px;font-size:.8125rem;}
  .faq-q{font-size:.9375rem;}
  .scene-tags{padding-left:0;}
}

/* roulang page: category3 */
:root{
  --ink:#1B1E22;
  --ink-soft:#2E3238;
  --muted:#5C6269;
  --line:#DDD8CE;
  --paper:#F4F2ED;
  --paper-deep:#EDEAE3;
  --surface:#FFFFFF;
  --signal:#E9B21A;
  --signal-deep:#C9940F;
  --on-dark:#F7F5F0;
  --radius-card:6px;
  --radius-btn:4px;
  --shadow-hover:0 18px 40px -24px rgba(27,30,34,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--signal-deep)}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:999;
  background:var(--ink);color:var(--on-dark);
  padding:12px 20px;border-radius:0 0 var(--radius-btn) 0;font-size:.9375rem;
}
.skip-link:focus{left:0;color:var(--on-dark)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:var(--on-dark);font-size:.8125rem;line-height:1}
.topbar-inner{display:flex;align-items:center;gap:20px;min-height:36px}
.topbar-domain{font-weight:700;letter-spacing:.05em;font-variant-numeric:tabular-nums}
.topbar-note{flex:1;color:rgba(247,245,240,.62);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-link{
  color:var(--on-dark);padding-bottom:2px;
  border-bottom:1px solid rgba(233,178,26,.35);
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.topbar-link:hover{color:var(--signal);border-bottom-color:var(--signal)}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:box-shadow 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:0 10px 26px -22px rgba(27,30,34,.6);
  background:rgba(244,242,237,.97);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:1.0625rem;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border-radius:6px;
  background:var(--ink);color:var(--signal);
  display:grid;place-items:center;
  font-size:.9375rem;font-weight:800;letter-spacing:0;
}
.brand-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;
  padding:10px 14px;
  font-size:.9375rem;
  font-weight:500;
  color:var(--ink-soft);
  border-radius:var(--radius-btn);
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-links a:hover{color:var(--ink);background:rgba(27,30,34,.05)}
.nav-links a.is-active{color:var(--ink);font-weight:700}
.nav-links a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;
  height:2px;background:var(--signal);
}
.nav-links a.nav-cta{
  margin-left:10px;
  background:var(--ink);color:var(--on-dark);
  padding:10px 20px;font-weight:600;
}
.nav-links a.nav-cta:hover{background:var(--signal);color:var(--ink)}
.nav-links a.nav-cta::after{display:none}
.nav-toggle{
  display:none;
  align-items:center;gap:8px;
  margin-left:auto;
  min-height:44px;padding:0 16px;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius-btn);
  color:var(--ink);font-size:.9375rem;font-weight:600;cursor:pointer;
  transition:border-color 180ms var(--ease),background 180ms var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);background:var(--surface)}
.nav-toggle-icon{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-icon span{display:block;height:2px;background:var(--ink);border-radius:1px;transition:transform 220ms var(--ease),opacity 180ms var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  color:var(--on-dark);
  background-image:
    linear-gradient(100deg,rgba(27,30,34,.93) 0%,rgba(27,30,34,.72) 46%,rgba(27,30,34,.32) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  padding:clamp(44px,6vw,84px) 0 clamp(40px,5.4vw,72px);
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:rgba(247,245,240,.14);
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:.8125rem;font-weight:700;letter-spacing:.14em;
  color:var(--signal);margin-bottom:18px;
}
.hero-eyebrow::before{content:"";width:26px;height:2px;background:var(--signal)}
.page-hero h1{
  font-size:clamp(1.9rem,4.2vw,3.4rem);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  max-width:16em;
  margin-bottom:16px;
}
.hero-lead{
  font-size:clamp(.9375rem,1.5vw,1.0625rem);
  color:rgba(247,245,240,.82);
  max-width:34em;
  line-height:1.8;
}
.hero-back{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:24px;
  font-size:.9375rem;font-weight:600;
  color:var(--on-dark);
  padding-bottom:3px;
  position:relative;
}
.hero-back::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--signal);
  transition:width 220ms var(--ease);
}
.hero-back:hover{color:var(--signal)}
.hero-back:hover::after{width:calc(100% - 20px)}
.hero-back span{transition:transform 220ms var(--ease)}
.hero-back:hover span{transform:translateX(6px)}

/* ---------- 吸顶锚点导航 ---------- */
.anchor-bar{
  z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  position:static;
}
.anchor-bar.is-sticky{position:sticky;top:72px;box-shadow:0 12px 24px -24px rgba(27,30,34,.7)}
.anchor-inner{
  display:flex;align-items:center;gap:10px;
  padding:12px 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-link{
  flex:0 0 auto;
  display:inline-flex;align-items:center;
  min-height:38px;padding:0 18px;
  border:1px solid var(--line);border-radius:999px;
  background:var(--surface);
  font-size:.875rem;font-weight:500;color:var(--muted);
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.anchor-link:hover{color:var(--ink);border-color:var(--ink)}
.anchor-link.is-current{background:var(--ink);border-color:var(--ink);color:var(--on-dark)}

/* ---------- 通用板块 ---------- */
.section{padding:clamp(56px,7vw,96px) 0;scroll-margin-top:140px}
.section + .section{border-top:1px solid var(--line)}
.section-alt{background:var(--paper-deep)}
.section-head{max-width:760px;margin-bottom:clamp(28px,4vw,44px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:.8125rem;font-weight:700;letter-spacing:.14em;
  color:var(--signal-deep);margin-bottom:14px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--signal)}
.section-head h2{
  font-size:clamp(1.6rem,3vw,2.6rem);
  font-weight:800;line-height:1.2;letter-spacing:-.015em;
  margin-bottom:12px;
}
.section-head p{font-size:1rem;color:var(--muted);line-height:1.85;max-width:44em}
.section-foot{margin-top:28px;font-size:.875rem;color:var(--muted)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:border-color 180ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card-media{aspect-ratio:16/10;overflow:hidden;background:var(--paper-deep);border-bottom:1px solid var(--line)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 520ms var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:clamp(20px,2.4vw,28px)}
.card-body h3{font-size:1.1875rem;font-weight:700;line-height:1.45;margin-bottom:10px}
.card-body p{font-size:.9375rem;color:var(--muted);line-height:1.85}
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;border-radius:999px;
  border:1px solid var(--line);
  font-size:.75rem;font-weight:600;color:var(--ink-soft);
  background:var(--surface);
  margin-bottom:12px;
}
.badge-signal{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.commit-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:start}
.commit-side{display:grid;gap:24px}
.mini-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:clamp(20px,2.2vw,26px);
  transition:border-color 180ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.mini-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.mini-icon{
  width:36px;height:36px;border-radius:6px;
  display:grid;place-items:center;
  background:var(--paper-deep);color:var(--ink-soft);
  font-size:.8125rem;font-weight:800;letter-spacing:.04em;
  margin-bottom:14px;
}
.mini-card h3{font-size:1.0625rem;font-weight:700;line-height:1.5;margin-bottom:8px}
.mini-card p{font-size:.9375rem;color:var(--muted);line-height:1.85}

/* ---------- 步骤流程 ---------- */
.steps{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.step{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:30px 22px 24px;
  transition:border-color 180ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.step:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.step::before{
  content:"";position:absolute;top:-1px;left:22px;
  width:44px;height:3px;background:var(--signal);
}
.step-num{
  display:block;
  font-size:.8125rem;font-weight:800;letter-spacing:.16em;
  color:var(--signal-deep);
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:1.0625rem;font-weight:700;line-height:1.5;margin:10px 0 8px}
.step p{font-size:.9375rem;color:var(--muted);line-height:1.8}

/* ---------- 数据条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  margin-top:clamp(28px,4vw,44px);
}
.metric{padding:26px 22px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric-num{
  font-size:clamp(1.6rem,2.6vw,2.2rem);
  font-weight:800;line-height:1.1;letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
  display:flex;align-items:baseline;gap:4px;
}
.metric-num small{font-size:.875rem;font-weight:600;color:var(--muted);letter-spacing:0}
.metric p{font-size:.875rem;color:var(--muted);line-height:1.75;margin-top:8px}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,56px);align-items:center}
.split-media{
  position:relative;
  aspect-ratio:4/3;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--paper-deep);
}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-media .float-card{
  position:absolute;left:18px;bottom:18px;
  background:rgba(27,30,34,.94);
  color:var(--on-dark);
  border-radius:var(--radius-card);
  padding:14px 18px;
  max-width:78%;
}
.float-card strong{display:block;font-size:1.0625rem;font-weight:800;font-variant-numeric:tabular-nums}
.float-card span{display:block;font-size:.8125rem;color:rgba(247,245,240,.68);margin-top:2px}
.split h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;line-height:1.25;letter-spacing:-.012em;margin-bottom:14px}
.split p{font-size:.9375rem;color:var(--muted);line-height:1.9;margin-bottom:16px}
.tick-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.tick-list li{position:relative;padding-left:26px;font-size:.9375rem;color:var(--ink-soft);line-height:1.8}
.tick-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;border-radius:1px;background:var(--signal);
}
.tick-list li strong{font-weight:700;color:var(--ink)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px}
.faq-wrap ul.accordion{
  list-style:none;margin:0;padding:0;
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);overflow:hidden;
}
.faq-wrap .accordion-item{border-bottom:1px solid var(--line)}
.faq-wrap .accordion-item:last-child{border-bottom:none}
.faq-wrap .accordion-title{
  background:transparent;border:none;
  padding:20px 54px 20px 22px;
  font-size:1rem;font-weight:600;line-height:1.65;color:var(--ink);
  position:relative;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.faq-wrap .accordion-title:hover{color:var(--signal-deep);background:rgba(27,30,34,.02)}
.faq-wrap .accordion-title::before{
  content:"";position:absolute;right:23px;top:50%;
  width:12px;height:2px;background:var(--ink);
  transform:translateY(-50%);
  transition:background 180ms var(--ease);
}
.faq-wrap .accordion-title::after{
  content:"";position:absolute;right:28px;top:50%;
  width:2px;height:12px;background:var(--ink);
  transform:translateY(-50%);
  transition:transform 200ms var(--ease),opacity 200ms var(--ease),background 180ms var(--ease);
}
.faq-wrap .accordion-title:hover::before,
.faq-wrap .accordion-title:hover::after{background:var(--signal-deep)}
.faq-wrap .accordion-title[aria-expanded="true"]::after{opacity:0;transform:translateY(-50%) rotate(90deg)}
.faq-wrap .accordion-content{
  padding:0 22px 22px;
  border:none;background:transparent;
  color:var(--muted);font-size:.9375rem;line-height:1.9;
  max-width:720px;
}
.faq-wrap .accordion-content p{margin:0}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink);color:var(--on-dark);
  border-radius:var(--radius-card);
  padding:clamp(30px,4vw,56px);
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,48px);
  align-items:center;
}
.cta-band h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;line-height:1.28;letter-spacing:-.012em;margin-bottom:12px}
.cta-band p{font-size:.9375rem;color:rgba(247,245,240,.74);line-height:1.85;max-width:32em}
.cta-form{display:grid;gap:14px}
.field label{display:block;font-size:.8125rem;font-weight:600;color:rgba(247,245,240,.78);margin-bottom:8px}
.field input{
  width:100%;height:48px;padding:0 14px;
  border-radius:var(--radius-btn);
  border:1px solid rgba(247,245,240,.26);
  background:rgba(247,245,240,.07);
  color:var(--on-dark);
  font-size:.9375rem;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease);
}
.field input::placeholder{color:rgba(247,245,240,.42)}
.field input:focus{
  outline:none;background:rgba(247,245,240,.12);
  border-color:var(--signal);
  box-shadow:0 0 0 2px rgba(233,178,26,.4);
}
.form-note{font-size:.75rem;color:rgba(247,245,240,.52);line-height:1.7;margin:0}
.form-msg{font-size:.8125rem;color:var(--signal);min-height:1.2em;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:.9375rem;font-weight:600;
  cursor:pointer;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 220ms var(--ease);
}
.btn-primary{background:var(--ink);color:var(--on-dark)}
.btn-primary:hover{background:var(--signal);color:var(--ink);transform:translateY(-1px)}
.btn-primary:active{background:var(--signal-deep);color:var(--ink);transform:translateY(0)}
.btn-signal{background:var(--signal);color:var(--ink)}
.btn-signal:hover{background:var(--on-dark);color:var(--ink);transform:translateY(-1px)}
.btn-signal:active{background:var(--signal-deep);color:var(--ink);transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(247,245,240,.5);color:var(--on-dark)}
.btn-ghost:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark);padding-top:clamp(48px,6vw,80px)}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:clamp(24px,3.4vw,40px);
  padding-bottom:clamp(32px,4vw,52px);
}
.footer-brand .brand{color:var(--on-dark)}
.footer-brand .brand-mark{background:var(--signal);color:var(--ink)}
.footer-brand p{
  font-size:.9375rem;line-height:1.85;color:rgba(247,245,240,.66);
  margin:18px 0;max-width:320px;
}
.footer-domain{font-size:.8125rem;color:rgba(247,245,240,.45);letter-spacing:.05em;font-variant-numeric:tabular-nums}
.footer-col h3{
  font-size:.875rem;font-weight:700;letter-spacing:.06em;
  color:var(--on-dark);margin-bottom:16px;
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-links a,.footer-links span{
  font-size:.9375rem;color:rgba(247,245,240,.72);line-height:1.75;
  transition:color 180ms var(--ease);
}
.footer-links a:hover{color:var(--signal)}
.footer-bottom{
  border-top:1px solid rgba(247,245,240,.16);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:.8125rem;color:rgba(247,245,240,.5);line-height:1.7;
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 560ms var(--ease),transform 560ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed;left:0;right:0;top:108px;bottom:0;
    margin:0;padding:12px 24px 40px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity 200ms var(--ease),transform 200ms var(--ease),visibility 200ms var(--ease);
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:none}
  .nav-links a{
    font-size:1.25rem;font-weight:600;line-height:56px;min-height:56px;
    padding:0 6px;border-radius:0;border-bottom:1px solid var(--line);
  }
  .nav-links a.is-active{color:var(--signal-deep)}
  .nav-links a.is-active::after{display:none}
  .nav-links a.nav-cta{
    margin:18px 0 0;line-height:48px;min-height:48px;padding:0 20px;
    border-radius:var(--radius-btn);border-bottom:none;text-align:center;justify-content:center;
  }
  .site-header.is-open{background:var(--paper)}
  .anchor-bar.is-sticky{top:72px}
  .commit-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric{border-bottom:1px solid var(--line)}
  .metric:nth-child(2n){border-right:none}
  .metric:nth-last-child(-n+2){border-bottom:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .topbar-note{display:none}
  .topbar-inner{justify-content:space-between}
  .page-hero{padding-top:44px}
  .split-media{aspect-ratio:3/2}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand p{max-width:none}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .nav-inner{gap:12px;min-height:64px}
  .brand{font-size:1rem}
  .brand-mark{width:30px;height:30px;font-size:.875rem}
  .nav-links{top:100px}
  .steps{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .metric{border-right:none;border-bottom:1px solid var(--line);padding:20px 0}
  .metric:last-child{border-bottom:none}
  .cta-band{padding:26px 20px}
  .btn{width:100%;padding:0 20px}
  .hero-back{margin-top:20px}
  .float-card{left:12px;bottom:12px;padding:12px 14px;max-width:86%}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}