/* roulang page: index */
:root{
  --primary:#0F3D2E;
  --primary-600:#15543D;
  --accent:#D6F84C;
  --ink:#0E1214;
  --ink-2:#5B6470;
  --paper:#FBFAF7;
  --paper-2:#F2EFE8;
  --line:#E3DFD6;
  --warn:#FF5A2B;
  --r-btn:4px;
  --r-card:10px;
  --r-img:10px;
  --r-badge:2px;
  --shadow-card:0 10px 30px -18px rgba(14,18,20,.25);
}
*,*::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",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section-tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:var(--r-badge);
  padding:4px 10px;
  background:rgba(15,61,46,.08);
  color:var(--primary);
  font-size:12px;font-weight:600;letter-spacing:.08em;
}
.h2-title{
  font-size:clamp(1.6rem,2.6vw,2.4rem);
  font-weight:700;line-height:1.2;letter-spacing:-.01em;
}
.h2-title::before{
  content:"";display:block;width:36px;height:4px;border-radius:2px;
  background:var(--primary);margin-bottom:18px;
}
.lead{color:var(--ink-2);font-size:17px;line-height:1.85}
.meta{font-size:13px;line-height:1.5;color:var(--ink-2)}
.meta-tag{letter-spacing:.08em;text-transform:uppercase}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#c8ea3e}
.btn:active{transform:translateY(1px)}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:80;height:64px;
  background:transparent;
  transition:background-color .25s ease,border-color .25s ease,backdrop-filter .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.header-inner{height:100%;display:flex;align-items:center;gap:28px}
.brand{
  font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);
  display:inline-flex;align-items:center;gap:8px;flex-shrink:0;
}
.brand-dot{width:10px;height:10px;border-radius:2px;background:var(--primary);display:inline-block}
.nav-desktop{display:flex;align-items:center;gap:24px;margin-left:8px}
.nav-link{
  position:relative;font-size:14px;font-weight:500;color:var(--ink-2);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--primary);transition:width .2s ease;
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--primary);font-weight:700}
.nav-link.active::after{width:100%}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);color:var(--ink-2);
  background:rgba(255,255,255,.6);transition:color .2s ease,border-color .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary)}
.search-wrap{position:relative;display:flex;align-items:center}
.search-box{
  width:0;opacity:0;overflow:hidden;transition:width .25s ease,opacity .25s ease;
}
.search-box.is-open{width:210px;opacity:1;margin-right:8px}
.search-box input{
  width:100%;height:38px;border:1px solid var(--line);border-radius:var(--r-btn);
  padding:0 12px;background:#fff;font-size:14px;transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,61,46,.15)}
.menu-btn{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;
}
.menu-btn span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,18,20,.45);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;background:var(--paper);
  z-index:100;transform:translateX(102%);transition:transform .28s ease;
  padding:24px;display:flex;flex-direction:column;gap:8px;border-left:1px solid var(--line);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-link{
  padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-2);
}
.drawer-link.active{color:var(--primary);font-weight:700}
.drawer-cta{margin-top:20px}

/* Hero */
.hero{padding-top:132px;padding-bottom:88px}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.hero-copy{grid-column:span 7}
.hero-visual{grid-column:span 5;margin-right:calc(50% - 50vw)}
.hero-visual img{
  width:100%;height:520px;object-fit:cover;
  border-radius:var(--r-img) 0 0 var(--r-img);
}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.hero h1{
  font-size:clamp(2.25rem,5.2vw,4.25rem);
  font-weight:800;line-height:1.06;letter-spacing:-.01em;
  max-width:16ch;
}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.75;color:var(--ink-2);max-width:44ch}
.hero-cta{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px}
.hero-trust{margin-top:34px;display:flex;flex-wrap:wrap;gap:10px}
.trust-chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-2);
  border:1px solid var(--line);border-radius:var(--r-badge);padding:6px 10px;background:#fff;
}
.trust-chip i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}

/* 指标 */
.metrics{background:var(--ink);color:#fff}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:52px 28px;border-left:1px solid rgba(255,255,255,.12)}
.metric:first-child{border-left:none}
.metric-num{
  font-size:clamp(2.5rem,5vw,4rem);font-weight:800;line-height:1;
  color:var(--accent);letter-spacing:-.02em;
}
.metric-label{margin-top:14px;font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.72)}

/* 服务矩阵 */
.service-list{border-top:1px solid var(--line)}
.service-row{
  display:grid;grid-template-columns:72px 1fr 300px;gap:32px;align-items:center;
  padding:30px 16px 30px 0;border-bottom:1px solid var(--line);
  transition:background-color .25s ease,transform .25s ease;
}
.service-row:hover{background:var(--paper-2);transform:translateX(4px)}
.service-index{font-size:26px;font-weight:300;color:var(--primary);letter-spacing:.02em}
.service-row h3{font-size:1.2rem;font-weight:600;margin-bottom:8px}
.service-row p{color:var(--ink-2);font-size:15px;line-height:1.8;max-width:56ch}
.service-thumb img{width:100%;height:150px;object-fit:cover;border-radius:var(--r-img)}
.service-arrow{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-size:14px;font-weight:600;color:var(--primary)}
.service-row:hover .service-arrow{text-decoration:underline;text-underline-offset:4px}

/* 结果对比 */
.compare{background:var(--paper-2)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px}
.compare-col{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px}
.compare-col h3{font-size:1.05rem;font-weight:700;margin-bottom:22px;display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.dot-base{background:#C9C5BB}
.dot-good{background:var(--primary)}
.bar-item{margin-bottom:20px}
.bar-head{display:flex;justify-content:space-between;font-size:14px;margin-bottom:8px}
.bar-head b{font-weight:700}
.bar-track{height:6px;border-radius:3px;background:#E9E5DC;overflow:hidden}
.bar-fill{height:100%;width:0;border-radius:3px;transition:width .6s ease}
.bar-fill.base{background:#B9B4A8}
.bar-fill.good{background:var(--primary)}
.bar-fill.accent{background:var(--accent)}
.compare-note{
  margin-top:36px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
}

/* 资讯列表 */
.news-feature{
  display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:center;
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff;
  transition:box-shadow .25s ease,transform .25s ease;
}
.news-feature:hover{box-shadow:var(--shadow-card);transform:translateY(-2px)}
.news-feature-img img{width:100%;height:100%;min-height:260px;object-fit:cover;aspect-ratio:16/10}
.news-feature-body{padding:32px 34px 32px 8px}
.news-feature-body h3{font-size:1.35rem;font-weight:700;line-height:1.4;margin:14px 0 12px;transition:color .2s ease}
.news-feature:hover .news-feature-body h3{color:var(--primary)}
.news-feature-body p{color:var(--ink-2);font-size:15px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-rows{margin-top:16px;border-top:1px solid var(--line)}
.news-row{
  display:flex;align-items:center;gap:16px;min-height:56px;padding:10px 4px;
  border-bottom:1px solid var(--line);transition:background-color .2s ease,transform .2s ease;
}
.news-row:hover{background:var(--paper-2);transform:translateX(4px)}
.news-row h3{font-size:16px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-row:hover h3{color:var(--primary)}
.news-row .arrow{color:var(--ink-2);transition:transform .2s ease,color .2s ease}
.news-row:hover .arrow{transform:translateX(4px);color:var(--primary)}
.news-side{border:1px solid var(--line);border-radius:var(--r-card);padding:26px;background:var(--paper-2)}
.news-side h3{font-size:1.05rem;font-weight:700;margin-bottom:10px}
.news-side p{color:var(--ink-2);font-size:14px;line-height:1.8;margin-bottom:18px}
.news-empty{
  border:1px dashed var(--line);border-radius:8px;min-height:180px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  color:var(--ink-2);text-align:center;padding:24px;
}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden;transition:border-color .2s ease}
.faq-item.is-open{border-color:var(--primary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;color:var(--primary);
  transition:transform .26s ease,border-color .2s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a p{padding:0 20px 20px;color:var(--ink-2);font-size:15px;line-height:1.85}

/* 表单 */
.contact{background:var(--paper-2)}
.form-card{
  background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:32px;
}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;letter-spacing:.02em}
.field input,.field select,.field textarea{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;padding:0 14px;font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;min-height:110px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,61,46,.15)
}
.form-tip{font-size:12px;color:var(--ink-2);margin-top:12px}
.form-msg{display:none;margin-bottom:18px;padding:12px 14px;border-radius:4px;font-size:14px}
.form-msg.ok{display:block;background:rgba(15,61,46,.08);color:var(--primary);border:1px solid rgba(15,61,46,.2)}
.form-msg.err{display:block;background:rgba(255,90,43,.08);color:var(--warn);border:1px solid rgba(255,90,43,.3)}

/* 页脚 */
.site-footer{background:var(--ink);color:#E9E7E1;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.site-footer h4{font-size:14px;font-weight:700;letter-spacing:.08em;color:#fff;margin-bottom:18px}
.site-footer a{color:#B9BEC4;font-size:14px;line-height:2.1;transition:color .2s ease}
.site-footer a:hover{color:var(--accent)}
.footer-brand{font-size:18px;font-weight:800;color:#fff;display:inline-flex;align-items:center;gap:8px}
.footer-brand .brand-dot{background:var(--accent)}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.9;color:#9AA1A8;max-width:34ch}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;font-size:13px;color:#8C939A;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s ease,transform .42s ease}
.reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1024px){
  .nav-desktop{display:none}
  .menu-btn{display:inline-flex}
  .search-box.is-open{width:150px}
  .hero{padding-top:112px}
  .hero-copy{grid-column:span 12}
  .hero-visual{grid-column:span 12;margin-right:0}
  .hero-visual img{height:380px;border-radius:var(--r-img)}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(3){border-left:none}
  .metric{border-top:1px solid rgba(255,255,255,.12)}
  .metric:first-child,.metric:nth-child(2){border-top:none}
  .service-row{grid-template-columns:56px 1fr;gap:20px}
  .service-thumb{display:none}
  .news-feature{grid-template-columns:1fr}
  .news-feature-body{padding:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .hero{padding-top:96px;padding-bottom:64px}
  .hero h1{max-width:none}
  .hero-visual img{height:280px}
  .compare-grid{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:1fr 1fr}
  .metric{padding:36px 20px}
  .news-row h3{white-space:normal}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:520px){
  .header-actions .btn-sm{display:none}
  .search-box.is-open{width:120px}
  .hero-cta .btn{width:100%}
  .service-row{padding:24px 0}
  .metric-num{font-size:2.5rem}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --primary:#0F3D2E;
  --primary-600:#15543D;
  --accent:#D6F84C;
  --ink:#0E1214;
  --ink-2:#5B6470;
  --paper:#FBFAF7;
  --paper-2:#F2EFE8;
  --line:#E3DFD6;
  --alert:#FF5A2B;
  --radius-btn:4px;
  --radius-card:10px;
  --radius-badge:2px;
  --shadow-card:0 10px 30px -18px rgba(14,18,20,.25);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-dot{
  width:9px;height:9px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 0 3px rgba(214,248,76,.28);
  flex:none;
}
.nav-desktop{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;
  padding:9px 13px;
  font-size:14.5px;
  color:var(--ink-2);
  border-radius:4px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--primary);background:rgba(15,61,46,.05)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:3px;
  height:2px;border-radius:1px;
  background:var(--accent);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:none}
.search-wrap{position:relative;display:flex;align-items:center}
.search-box{
  width:0;
  opacity:0;
  overflow:hidden;
  transition:width .28s ease,opacity .2s ease,margin .28s ease;
}
.search-box.open{width:214px;opacity:1;margin-right:8px}
.search-box input{
  width:100%;
  height:38px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  font-size:14px;
  outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9AA1A9}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,61,46,.15)}
.icon-btn{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  color:var(--ink-2);
  background:#fff;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--paper-2)}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  cursor:pointer;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#c7ec37}
.btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.menu-btn{
  display:none;
  width:38px;height:38px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
}
.menu-btn span{position:relative;display:block;width:16px;height:1.5px;background:var(--ink);transition:background .2s}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}

/* mobile drawer */
.drawer{
  position:fixed;
  top:0;right:0;
  width:320px;max-width:88vw;
  height:100vh;
  background:var(--paper);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .3s ease;
  z-index:80;
  padding:24px 22px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-close{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:4px;color:var(--ink-2);
  margin-left:auto;
}
.drawer-head{display:flex;align-items:center;margin-bottom:22px}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{
  padding:13px 12px;
  border-radius:6px;
  font-size:15.5px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
  transition:background .2s ease,color .2s ease,padding-left .2s ease;
}
.drawer nav a:hover,.drawer nav a.active{background:var(--paper-2);color:var(--primary);padding-left:16px}
.drawer .btn{width:100%;margin-top:22px}
.mask{
  position:fixed;inset:0;background:rgba(14,18,20,.45);
  opacity:0;pointer-events:none;transition:opacity .3s ease;z-index:70;
}
.mask.open{opacity:1;pointer-events:auto}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(251,250,247,.93),rgba(251,250,247,.98)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
}
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:6px;
  font-size:13px;
  line-height:1.5;
  color:var(--ink-2);
  padding:22px 0 0;
}
.crumbs a{color:var(--ink-2);transition:color .2s ease}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:#A9AEB5}
.crumbs .current{
  color:var(--ink-2);
  max-width:46ch;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-head{padding:20px 0 44px;max-width:880px}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  background:rgba(15,61,46,.08);
  color:var(--primary);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.06em;
}
.badge-accent{background:var(--accent);color:var(--ink)}
.article-head h1{
  margin-top:16px;
  font-size:clamp(1.85rem,4vw,3rem);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  margin-top:20px;
  font-size:13px;
  color:var(--ink-2);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.meta-tag{
  font-size:11.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:#8C939B;
}

/* ---------- article layout ---------- */
.article-section{padding:56px 0 80px}
.article-layout{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
  align-items:start;
}
.article-toc{grid-column:1 / 4;position:sticky;top:92px}
.toc-card{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  background:#fff;
}
.toc-card h3{
  font-size:12.5px;
  letter-spacing:.1em;
  color:#8C939B;
  font-weight:600;
  margin-bottom:12px;
}
.toc-card ol{display:flex;flex-direction:column;gap:2px;counter-reset:toc}
.toc-card li{counter-increment:toc}
.toc-card a{
  display:flex;
  gap:10px;
  padding:8px 10px;
  border-radius:6px;
  font-size:14px;
  color:var(--ink-2);
  transition:color .2s ease,background .2s ease,padding-left .2s ease;
}
.toc-card a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:12px;
  color:#A9AEB5;
  padding-top:2px;
}
.toc-card a:hover,.toc-card a.active{color:var(--primary);background:var(--paper-2);padding-left:14px}
.toc-back{
  display:block;
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--primary);
  font-weight:600;
}

.article-main{grid-column:4 / 12;min-width:0}
.article-body{max-width:770px}

.prose{font-size:17px;line-height:1.9;color:#1B2124}
.prose > * + *{margin-top:1.15em}
.prose h2{
  margin-top:2em;
  font-size:clamp(1.35rem,2.2vw,1.7rem);
  font-weight:700;
  line-height:1.3;
  padding-left:14px;
  border-left:3px solid var(--accent);
}
.prose h3{margin-top:1.7em;font-size:1.18rem;font-weight:600;line-height:1.4}
.prose p{color:#242B2F}
.prose a{color:var(--primary);font-weight:600;border-bottom:1px solid rgba(15,61,46,.3);transition:border-color .2s ease}
.prose a:hover{border-bottom-color:var(--primary)}
.prose ul,.prose ol{padding-left:1.3em}
.prose ul li{list-style:none;position:relative;padding-left:1em;margin-top:.5em}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:5px;height:5px;border-radius:1px;background:var(--primary);
}
.prose ol{list-style:decimal}
.prose ol li{margin-top:.5em}
.prose img{border-radius:var(--radius-card);margin:1.6em 0;width:100%}
.prose blockquote{
  border-left:3px solid var(--primary);
  background:var(--paper-2);
  padding:16px 20px;
  border-radius:0 8px 8px 0;
  color:var(--ink-2);
  font-size:16px;
}
.prose table{width:100%;border-collapse:collapse;font-size:15px}
.prose th,.prose td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.prose th{background:var(--paper-2);font-weight:600}
.prose code{
  font-family:var(--font-mono);
  font-size:.92em;
  background:var(--paper-2);
  padding:2px 6px;
  border-radius:4px;
}

.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  padding:56px 24px;
  text-align:center;
  background:#fff;
}
.empty-state p{font-size:17px;font-weight:600;margin-bottom:18px}

/* tags */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:40px;align-items:center}
.tag-row .label{font-size:12.5px;letter-spacing:.08em;color:#8C939B;margin-right:4px}
.tag{
  display:inline-flex;
  align-items:center;
  padding:6px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius-badge);
  font-size:13.5px;
  color:var(--ink-2);
  background:#fff;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--paper-2)}

/* prev / next */
.post-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:44px;
  max-width:770px;
}
.post-nav-item{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 20px;
  background:#fff;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.post-nav-item:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.post-nav-label{display:block;font-size:12px;letter-spacing:.1em;color:#8C939B;margin-bottom:8px}
.post-nav-title{display:block;font-size:15px;font-weight:600;line-height:1.55;color:var(--ink)}
.post-nav-item.next{text-align:right}

/* faq */
.faq-block{margin-top:64px;padding-top:44px;border-top:1px solid var(--line);max-width:770px}
.faq-block h2{
  font-size:clamp(1.35rem,2.2vw,1.75rem);
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:8px;
}
.faq-block .sub{color:var(--ink-2);font-size:15px;margin-bottom:24px}
.faq-item{
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
  margin-bottom:10px;
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item[open]{border-color:var(--primary)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  font-size:16.5px;
  font-weight:600;
  line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  flex:none;
  width:24px;height:24px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:50%;
  font-size:15px;
  font-weight:400;
  color:var(--ink-2);
  transition:transform .26s ease,color .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--primary);border-color:var(--primary)}
.faq-body{
  padding:0 18px 18px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-2);
}

/* related */
.related{margin-top:64px;padding-top:44px;border-top:1px solid var(--line)}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.related-head h2{font-size:clamp(1.35rem,2.2vw,1.75rem);font-weight:700;letter-spacing:-.01em}
.related-head .more{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.related-head .more span{transition:transform .2s ease}
.related-head .more:hover span{transform:translateX(4px)}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.related-card{
  display:flex;
  flex-direction:column;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:#fff;
  overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card);border-color:#D3CEBF}
.related-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.related-card:hover .thumb img{transform:scale(1.04)}
.related-card .body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-card h3{font-size:16px;font-weight:600;line-height:1.5;transition:color .2s ease}
.related-card:hover h3{color:var(--primary)}
.related-card .time{font-size:12.5px;color:#8C939B;margin-top:auto}

.back-bar{margin-top:48px;padding-top:32px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9E7E1;margin-top:0;padding:64px 0 0}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:17px;
  font-weight:800;
  color:#fff;
  margin-bottom:14px;
}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(233,231,225,.7);max-width:34ch}
.site-footer h4{
  font-size:13px;
  letter-spacing:.1em;
  color:rgba(233,231,225,.55);
  font-weight:600;
  margin-bottom:16px;
}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul a{
  font-size:14.5px;
  color:rgba(233,231,225,.82);
  transition:color .2s ease,padding-left .2s ease;
}
.site-footer ul a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;
  color:rgba(233,231,225,.6);
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s ease,transform .42s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-toc{display:none}
  .article-main{grid-column:1 / -1}
}
@media (max-width:1024px){
  .nav-desktop{display:none}
  .header-actions .btn-primary{display:none}
  .menu-btn{display:inline-flex}
  .header-inner{height:60px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .article-section{padding:44px 0 64px}
  .article-head{padding:16px 0 34px}
  .crumbs{padding-top:18px}
  .post-nav{grid-template-columns:minmax(0,1fr)}
  .post-nav-item.next{text-align:left}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .search-box.open{width:140px}
}
@media (max-width:520px){
  .header-inner{gap:14px}
  .brand{font-size:15.5px}
  .search-wrap{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .prose{font-size:16.5px}
  .article-head h1{font-size:1.7rem}
}

/* roulang page: category1 */
:root{
  --primary:#0F3D2E;
  --primary-600:#15543D;
  --accent:#D6F84C;
  --ink:#0E1214;
  --ink-2:#5B6470;
  --paper:#FBFAF7;
  --paper-2:#F2EFE8;
  --line:#E3DFD6;
  --alert:#FF5A2B;
  --radius-btn:4px;
  --radius-card:8px;
  --radius-img:10px;
  --shadow-hover:0 10px 30px -18px rgba(14,18,20,.25);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.num,.metric{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,250,247,.82);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(251,250,247,.94);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;height:64px;gap:28px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.0625rem;letter-spacing:-.01em;white-space:nowrap}
.brand-dot{width:10px;height:10px;border-radius:2px;background:var(--accent);display:inline-block;box-shadow:0 0 0 3px rgba(15,61,46,.10)}
.nav-desktop{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);transition:width .2s ease}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-wrap{display:flex;align-items:center;gap:8px}
.search-box{display:flex;align-items:center}
.search-box input{
  width:0;opacity:0;height:38px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;padding:0;transition:width .25s ease,opacity .2s ease,padding .25s ease;font-size:14px;
}
.search-wrap.is-open .search-box input{width:220px;opacity:1;padding:0 12px}
.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,61,46,.15)}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--ink-2);
  cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;padding:0 20px;height:44px;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#ffffff}
.btn:focus-visible,.icon-btn:focus-visible,.nav-link:focus-visible,a:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;
}
.menu-btn span{display:block;width:16px;height:2px;background:var(--ink);position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink)}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}

/* ---------- mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,18,20,.42);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;background:var(--paper);
  z-index:80;padding:24px;transform:translateX(100%);transition:transform .3s ease;
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;border-left:1px solid var(--line);
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--ink-2)}
.drawer-link{display:block;padding:13px 4px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink)}
.drawer-link:hover,.drawer-link.active{color:var(--primary);font-weight:600}
.drawer-cta{margin-top:18px}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:22px 0 0;font-size:13px;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.breadcrumb a{color:var(--ink-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-2)}

/* ---------- hero ---------- */
.cat-hero{padding:40px 0 72px;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;
  color:var(--primary);background:rgba(15,61,46,.07);border-radius:2px;padding:5px 10px;font-weight:600;
}
.hero-title{
  font-size:clamp(2.1rem,4.2vw,3.4rem);font-weight:800;line-height:1.1;letter-spacing:-.01em;
  margin:22px 0 0;
}
.hero-title .mark{position:relative;white-space:nowrap}
.hero-title .mark::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:8px;background:var(--accent);z-index:-1;opacity:.85}
.hero-lead{margin-top:22px;font-size:17px;color:var(--ink-2);max-width:34em}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  font-size:13px;color:var(--ink-2);border:1px solid var(--line);border-radius:2px;
  padding:5px 10px;background:#fff;
}
.hero-media{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--paper-2)}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media figcaption{font-size:12px;color:var(--ink-2);padding:10px 14px;border-top:1px solid var(--line);background:#fff}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section-alt{background:var(--paper-2)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{
  font-size:clamp(1.5rem,2.5vw,2.15rem);font-weight:700;line-height:1.22;position:relative;padding-left:18px;
}
.section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;background:var(--primary);border-radius:2px}
.section-head p{margin-top:16px;color:var(--ink-2)}

/* ---------- numbered list ---------- */
.number-list{border-top:1px solid var(--line)}
.number-item{
  display:grid;grid-template-columns:104px 1fr 180px;gap:32px;align-items:center;
  padding:28px 18px;border-bottom:1px solid var(--line);
  transition:background-color .2s ease,transform .2s ease;
}
.number-item:hover{background:var(--paper-2);transform:translateX(4px)}
.number-item .num{
  font-size:2.6rem;font-weight:700;line-height:1;color:var(--primary);
}
.number-item:hover .num{color:var(--primary-600)}
.number-body h3{font-size:1.125rem;font-weight:600}
.number-body p{margin-top:8px;color:var(--ink-2);font-size:15px}
.number-media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:#fff}
.number-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s ease}
.number-item:hover .number-media img{transform:scale(1.03)}
.number-item.no-media{grid-template-columns:104px 1fr auto}
.arrow{color:var(--primary);font-size:20px;transition:transform .2s ease}
.number-item:hover .arrow{transform:translateX(4px)}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.check-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.check-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#d8d2c6}
.check-card .dot{width:12px;height:12px;border-radius:2px;background:var(--accent);margin-bottom:16px}
.check-card h3{font-size:1.0625rem;font-weight:600}
.check-card p{margin-top:10px;color:var(--ink-2);font-size:15px}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-list{width:100%}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:10px;overflow:hidden;transition:border-color .2s ease;
}
.faq-item:hover{border-color:#d8d2c6}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;text-align:left;cursor:pointer;
  padding:18px 22px;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-icon{
  flex:0 0 24px;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;color:var(--primary);
  transition:transform .26s ease,border-color .26s ease;font-size:14px;line-height:1;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--ink-2);font-size:15px;line-height:1.85}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--primary);color:#fff;border-radius:var(--radius-card);
  padding:44px 48px;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-band h2{font-size:clamp(1.35rem,2.2vw,1.9rem);font-weight:700;line-height:1.25}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.78);font-size:15px;max-width:52ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-actions .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.cta-actions .btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9E7E1;margin-top:88px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:5fr 2.4fr 2.6fr 2.4fr;gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:1.05rem;font-weight:800;color:#fff}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(233,231,225,.72);max-width:36ch}
.site-footer h4{font-size:13px;letter-spacing:.1em;color:rgba(233,231,225,.55);font-weight:600;margin-bottom:16px;text-transform:uppercase}
.site-footer ul li{margin-bottom:11px}
.site-footer ul a{font-size:14.5px;color:rgba(233,231,225,.86);transition:color .2s ease,padding-left .2s ease}
.site-footer ul a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(233,231,225,.6);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s ease,transform .42s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .nav-desktop{gap:18px}
  .nav-link{font-size:14px}
}
@media (max-width:1024px){
  .nav-desktop{display:none}
  .menu-btn{display:inline-flex}
  .cat-hero{grid-template-columns:1fr;gap:32px;padding:28px 0 56px}
  .hero-media img{aspect-ratio:16/9}
  .number-item{grid-template-columns:80px 1fr;gap:20px}
  .number-media{display:none}
  .check-grid{grid-template-columns:1fr 1fr}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{grid-template-columns:1fr;padding:36px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .header-inner{height:56px;gap:16px}
  .search-wrap{display:none}
  .section{padding:56px 0}
  .hero-title{font-size:clamp(1.9rem,7vw,2.4rem)}
  .number-item{grid-template-columns:56px 1fr;padding:22px 8px}
  .number-item .num{font-size:1.9rem}
  .check-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --primary:#0F3D2E;
  --primary-600:#15543D;
  --accent:#D6F84C;
  --ink:#0E1214;
  --ink-2:#5B6470;
  --paper:#FBFAF7;
  --paper-2:#F2EFE8;
  --line:#E3DFD6;
  --warn:#FF5A2B;
  --radius-btn:4px;
  --radius-card:10px;
  --radius-badge:2px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
.num{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}

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

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.brand-dot{width:9px;height:9px;border-radius:2px;background:var(--accent);box-shadow:0 0 0 3px rgba(15,61,46,.12);flex:none}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--ink-2);
  border-radius:var(--radius-btn);
  transition:color .18s ease,background .18s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--primary);background:var(--paper-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-wrap{display:flex;align-items:center;gap:8px}
.search-box{width:0;overflow:hidden;transition:width .25s ease}
.search-wrap.is-open .search-box{width:206px}
.search-box input{
  width:100%;height:38px;padding:0 12px;font-size:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,61,46,.15)}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius-btn);
  cursor:pointer;color:var(--ink-2);transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:#fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:#fff}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#c8ee35;color:var(--ink)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.menu-btn{
  display:none;width:40px;height:40px;background:transparent;
  border:1px solid var(--line);border-radius:var(--radius-btn);cursor:pointer;position:relative;
}
.menu-btn span{position:absolute;top:50%;left:50%;width:16px;height:2px;background:var(--ink);transform:translate(-50%,-50%)}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);transition:transform .2s ease}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}

.nav-mobile{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:86vw;
  background:var(--paper);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s ease;
  z-index:80;padding:24px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
  box-shadow:-20px 0 40px -30px rgba(14,18,20,.4);
}
.nav-mobile.is-open{transform:none}
.nav-mobile .nav-mobile-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.nav-mobile a{padding:12px 4px;border-bottom:1px solid var(--line);font-size:15.5px;color:var(--ink)}
.nav-mobile a:hover,.nav-mobile a.active{color:var(--primary);font-weight:600}
.nav-close{width:36px;height:36px;border:1px solid var(--line);border-radius:var(--radius-btn);background:transparent;cursor:pointer;font-size:16px;line-height:1}
.backdrop{position:fixed;inset:0;background:rgba(14,18,20,.42);opacity:0;pointer-events:none;transition:opacity .28s ease;z-index:70}
.backdrop.is-open{opacity:1;pointer-events:auto}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:13px;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:20px 0 0}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{opacity:.55}
.crumbs .current{color:var(--ink-2)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:104px 0 66px;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(94deg,rgba(251,250,247,.98) 0%,rgba(251,250,247,.94) 46%,rgba(251,250,247,.62) 100%);
}
.page-hero > .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  font-size:12.5px;letter-spacing:.02em;border-radius:var(--radius-badge);
  background:var(--paper-2);color:var(--primary);border:1px solid var(--line);
}
.badge-accent{background:var(--accent);color:var(--ink);border-color:var(--accent);font-weight:600}
h1.hero-title{
  font-size:clamp(2.25rem,5.2vw,4rem);
  font-weight:800;line-height:1.06;letter-spacing:-.01em;margin:0 0 18px;
}
.hero-lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:620px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:#fff}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0}
.section-tight{padding:56px 0}
.section-head{max-width:760px;margin-bottom:38px}
.section-head h2{
  font-size:clamp(1.6rem,2.6vw,2.3rem);font-weight:700;line-height:1.2;letter-spacing:-.01em;
  padding-left:16px;border-left:4px solid var(--primary);margin-bottom:14px;
}
.section-head p{color:var(--ink-2);font-size:16px}
.section-alt{background:var(--paper-2)}
.eyebrow{font-size:13px;letter-spacing:.1em;color:var(--ink-2);margin-bottom:10px}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--ink);border-radius:var(--radius-card);overflow:hidden;
}
.stat-cell{padding:26px 24px;border-right:1px solid rgba(255,255,255,.12)}
.stat-cell:last-child{border-right:none}
.stat-cell .val{font-size:clamp(1.9rem,3.4vw,2.6rem);line-height:1.1;color:var(--accent);font-weight:700}
.stat-cell .val small{font-size:14px;color:#C9CFC6;margin-left:4px;font-weight:500}
.stat-cell .lab{margin-top:8px;font-size:13px;letter-spacing:.08em;color:#B9C0B8}

/* ---------- 非均匀卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 30px -18px rgba(14,18,20,.25);border-color:#d6d1c6}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:1.15rem;font-weight:600;line-height:1.4}
.card-body p{font-size:15px;color:var(--ink-2);line-height:1.8}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{font-size:12.5px;color:var(--primary);background:rgba(15,61,46,.06);border-radius:var(--radius-badge);padding:3px 9px}
.card--wide{grid-column:span 2;flex-direction:row;align-items:stretch}
.card--wide .card-media{flex:1 1 46%;min-width:0}
.card--wide .card-media img{height:100%;aspect-ratio:auto;min-height:260px}
.card--wide .card-body{flex:1 1 54%;padding:30px;gap:12px}
.card--wide .card-body h3{font-size:1.35rem}
.card--wide .card-body p{font-size:15.5px}

/* ---------- 对照表 ---------- */
.cmp-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.cmp-table th{
  height:46px;padding:0 18px;text-align:left;font-size:13px;font-weight:600;
  letter-spacing:.08em;color:var(--ink-2);border-bottom:1px solid var(--line);background:var(--paper);
}
.cmp-table td{height:52px;padding:0 18px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink)}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table tbody tr{transition:background .2s ease}
.cmp-table tbody tr:hover td{background:var(--paper-2)}
.cmp-table .col-key{font-weight:600;width:26%}
.cmp-table .muted{color:var(--ink-2)}
.cmp-table .hl{color:var(--primary);font-weight:600}
.cmp-note{margin-top:14px;font-size:13px;color:var(--ink-2)}

/* ---------- 适用场景行式列表 ---------- */
.scene-list{border-top:1px solid var(--line)}
.scene-row{
  display:grid;grid-template-columns:56px 1.1fr 1.6fr;gap:24px;align-items:start;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background .2s ease,transform .2s ease;
}
.scene-row:hover{background:var(--paper-2);transform:translateX(4px)}
.scene-row .idx{font-size:15px;color:var(--primary);font-weight:600}
.scene-row h3{font-size:1.05rem;font-weight:600;line-height:1.5}
.scene-row p{font-size:15px;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item[open]{border-color:#cfc9bc}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16.5px;font-weight:600;line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-icon{
  flex:none;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;position:relative;
  transition:transform .26s ease,border-color .2s ease,background .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--primary);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--primary);background:rgba(15,61,46,.06)}
.faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:34px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(1.35rem,2.1vw,1.75rem);font-weight:700;line-height:1.3;margin-bottom:8px}
.cta-band p{font-size:15px;color:var(--ink-2);max-width:640px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#E9E7E1;margin-top:64px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:17px;color:#fff}
.footer-desc{margin-top:14px;font-size:14.5px;line-height:1.85;color:#B4B9B3;max-width:340px}
.site-footer h4{font-size:13px;letter-spacing:.1em;color:#8E9790;margin-bottom:14px;font-weight:600}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul a{font-size:14.5px;color:#D8D5CE;transition:color .18s ease}
.site-footer ul a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8E9790;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .42s ease,transform .42s ease}
.reveal.is-in.d1{transition-delay:.06s}
.reveal.is-in.d2{transition-delay:.12s}
.reveal.is-in.d3{transition-delay:.18s}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  .reveal{opacity:1 !important;transform:none !important}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-desktop{display:none}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center}
  .header-inner{height:60px;gap:16px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero{padding:88px 0 54px}
  .stat-strip{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 rgba(255,255,255,.12)}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .card--wide{grid-column:span 2;flex-direction:column}
  .card--wide .card-media img{height:auto;aspect-ratio:16/10;min-height:0}
  .card--wide .card-body{padding:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:60px 0}
}
@media (max-width:767px){
  .scene-row{grid-template-columns:44px 1fr;gap:12px}
  .scene-row p{grid-column:2}
  .cmp-wrap{overflow-x:auto}
  .cmp-table{min-width:520px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .header-inner{height:56px}
  .search-wrap{display:none}
  .card-grid{grid-template-columns:1fr}
  .card--wide{grid-column:span 1}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .cta-band{padding:26px 22px}
  .btn{width:100%}
  .hero-cta .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --primary:#0F3D2E;
  --primary-600:#15543D;
  --accent:#D6F84C;
  --ink:#0E1214;
  --ink-2:#5B6470;
  --paper:#FBFAF7;
  --paper-2:#F2EFE8;
  --line:#E3DFD6;
  --warn:#FF5A2B;
  --radius-btn:4px;
  --radius-card:10px;
  --maxw:1240px;
  --shadow-hover:0 10px 30px -18px rgba(14,18,20,.25);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none;margin:0;padding:0}
p{margin:0}
h1,h2,h3,h4{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,247,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled{background:rgba(251,250,247,.97);box-shadow:0 12px 30px -26px rgba(14,18,20,.55)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;color:var(--ink)}
.brand-dot{width:10px;height:10px;border-radius:2px;background:var(--accent);box-shadow:0 0 0 3px rgba(15,61,46,.14);display:inline-block;flex:0 0 auto}
.nav-desktop{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link{position:relative;padding:8px 12px;font-size:15px;color:var(--ink-2);border-radius:4px;transition:color .2s ease,background .2s ease;white-space:nowrap}
.nav-link:hover{color:var(--primary);background:var(--paper-2)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--accent);border-radius:2px}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-wrap{position:relative;display:flex;align-items:center;gap:8px}
.search-box{width:0;overflow:hidden;transition:width .3s ease}
.search-box.is-open{width:220px}
.search-box input{width:100%;height:38px;padding:0 12px;border:1px solid var(--line);border-radius:4px;background:#fff;font-size:14px;outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,61,46,.15)}
.icon-btn{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--ink-2);cursor:pointer;transition:color .2s ease,border-color .2s ease,background .2s ease}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--paper-2)}
.menu-btn{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:#fff;cursor:pointer;position:relative}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{position:absolute;left:50%;width:16px;height:1.6px;background:var(--ink);border-radius:2px;transform:translateX(-50%);transition:transform .25s ease}
.menu-btn span{top:19px}
.menu-btn span::before{content:"";top:-5px;left:0;transform:none}
.menu-btn span::after{content:"";top:5px;left:0;transform:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#c9ec3d}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:var(--paper-2)}
.btn-ghost-light{background:rgba(251,250,247,.08);border-color:rgba(251,250,247,.42);color:#fff}
.btn-ghost-light:hover{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}

/* ---------- Drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(14,18,20,.45);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;z-index:55}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);background:var(--paper);border-left:1px solid var(--line);z-index:60;padding:20px;display:flex;flex-direction:column;gap:20px;transform:translateX(102%);transition:transform .3s ease;overflow-y:auto}
.mobile-drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:4px;background:#fff;font-size:20px;line-height:1;cursor:pointer;color:var(--ink-2)}
.drawer-close:hover{color:var(--primary);border-color:var(--primary)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line);padding-top:16px}
.drawer-link{padding:12px 10px;border-radius:4px;font-size:15px;color:var(--ink-2);transition:background .2s ease,color .2s ease}
.drawer-link:hover{background:var(--paper-2);color:var(--primary)}
.drawer-link.active{color:var(--primary);font-weight:600;background:var(--paper-2)}
.drawer-cta{width:100%}

/* ---------- Hero ---------- */
.cat-hero{position:relative;overflow:hidden;background:#0E1214;color:#fff}
.hero-bg{position:absolute;inset:0;background-image:url(/assets/images/backpic/back-2.png);background-size:cover;background-position:center;opacity:.6}
.hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,18,20,.94) 0%,rgba(14,18,20,.78) 46%,rgba(14,18,20,.36) 100%)}
.hero-inner{position:relative;padding:88px 24px 84px;max-width:840px}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:rgba(233,231,225,.72);margin-bottom:26px}
.breadcrumb a{color:rgba(233,231,225,.72);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{opacity:.45}
.breadcrumb .current{color:#fff}
.hero-badge{display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--accent);border:1px solid rgba(214,248,76,.42);border-radius:2px;padding:3px 10px;margin-bottom:18px}
.hero-title{font-size:clamp(2rem,4.6vw,3.35rem);font-weight:800;line-height:1.1;letter-spacing:-.01em;max-width:22ch}
.hero-lead{margin-top:20px;font-size:clamp(1rem,1.4vw,1.15rem);line-height:1.8;color:rgba(233,231,225,.82);max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.hero-tags li{font-size:13px;letter-spacing:.06em;color:rgba(233,231,225,.86);border:1px solid rgba(233,231,225,.22);border-radius:2px;padding:5px 12px;background:rgba(251,250,247,.05)}

/* ---------- Sections ---------- */
.section{padding:88px 0}
.section--tight{padding:72px 0 0}
.section-head{max-width:720px;margin-bottom:48px}
.eyebrow{font-size:13px;letter-spacing:.12em;color:var(--primary);font-weight:600;margin-bottom:12px}
.sec-title{font-size:clamp(1.6rem,2.6vw,2.35rem);font-weight:700;line-height:1.22;letter-spacing:-.01em}
.sec-sub{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-2)}

/* ---------- Split blocks ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.split.is-reverse{grid-template-columns:7fr 5fr}
.split.is-reverse .split-media{order:2}
.split.is-reverse .split-body{order:1}
.split + .split{margin-top:84px}
.split-media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:var(--paper-2)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.block-title{font-size:1.2rem;font-weight:600;line-height:1.4}
.split-body p{margin-top:16px;font-size:16px;line-height:1.9;color:var(--ink-2)}
.point-list{display:grid;gap:12px;margin-top:22px;border-top:1px solid var(--line);padding-top:20px}
.point-list li{display:flex;gap:12px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.point-list li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:2px;background:var(--accent);margin-top:9px}

/* ---------- Checklist ---------- */
.check-list{border-top:1px solid var(--line)}
.check-list .row{display:grid;grid-template-columns:1.1fr 2fr .9fr;gap:28px;align-items:start;padding:20px 12px;border-bottom:1px solid var(--line);transition:background .2s ease,transform .2s ease}
.check-list .row:hover{background:var(--paper-2);transform:translateX(4px)}
.row-title{font-size:1.05rem;font-weight:600;line-height:1.5}
.row-desc{font-size:15px;line-height:1.8;color:var(--ink-2)}
.row-meta{font-size:13px;letter-spacing:.06em;color:var(--primary);text-align:right;white-space:nowrap}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-list{display:grid;gap:10px}
.faq-item{border:1px solid var(--line);border-radius:8px;background:#fff;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:#cfcabd;box-shadow:var(--shadow-hover)}
.faq-item.is-open{border-color:rgba(15,61,46,.32)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;padding:18px 20px;background:none;border:0;text-align:left;cursor:pointer}
.faq-q-text{font-size:16.5px;font-weight:600;line-height:1.55;color:var(--ink)}
.faq-icon{flex:0 0 auto;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);font-size:15px;line-height:1;transition:transform .26s ease,color .26s ease,border-color .26s ease}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--primary);border-color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0}
.cta-inner{display:grid;grid-template-columns:7fr 5fr;gap:36px;align-items:center}
.cta-title{font-size:clamp(1.4rem,2.2vw,1.9rem);font-weight:700;line-height:1.3}
.cta-text{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--ink-2);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s ease,transform .42s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#E9E7E1;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(233,231,225,.68);max-width:34ch}
.site-footer h4{font-size:13px;letter-spacing:.1em;color:#fff;font-weight:600;margin-bottom:16px}
.site-footer ul{display:grid;gap:10px}
.site-footer a{font-size:14px;color:rgba(233,231,225,.7);transition:color .2s ease}
.site-footer a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:rgba(233,231,225,.55)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .nav-desktop{display:none}
  .menu-btn{display:block}
  .search-wrap{display:none}
  .split,.split.is-reverse{grid-template-columns:1fr;gap:32px}
  .split.is-reverse .split-media{order:0}
  .split.is-reverse .split-body{order:0}
  .split + .split{margin-top:64px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;gap:26px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .header-inner{height:56px}
  .site-header .brand{font-size:16.5px}
  .hero-inner{padding:64px 20px 60px}
  .hero-actions .btn{flex:1 1 auto}
  .check-list .row{grid-template-columns:1fr;gap:8px;padding:18px 8px}
  .row-meta{text-align:left}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .cta-band{padding:52px 0}
}
@media (max-width:520px){
  .hero-title{font-size:1.85rem}
  .hero-tags li{font-size:12px}
  .split-media img{aspect-ratio:16/10}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
    --primary:#0F3D2E;
    --primary-600:#15543D;
    --accent:#D6F84C;
    --ink:#0E1214;
    --ink-2:#5B6470;
    --paper:#FBFAF7;
    --paper-2:#F2EFE8;
    --line:#E3DFD6;
    --alert:#FF5A2B;
    --radius-btn:4px;
    --radius-card:10px;
    --shadow-card:0 10px 30px -18px rgba(14,18,20,.25);
    --container:1240px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input,select,textarea{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  .num{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}
  .container{width:100%;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
  .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

  /* ============ 头部导航 ============ */
  header.site-header{
    position:sticky;top:0;left:0;right:0;z-index:80;
    height:64px;display:flex;align-items:center;
    background:transparent;border-bottom:1px solid transparent;
    transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
  }
  header.site-header .header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%}
  header.site-header .brand{
    display:inline-flex;align-items:center;gap:9px;
    font-size:17px;font-weight:700;letter-spacing:.01em;color:#fff;
    transition:color .3s ease;white-space:nowrap;
  }
  .brand-dot{width:9px;height:9px;border-radius:2px;background:var(--accent);display:inline-block;flex:none}
  header.site-header .nav-desktop{display:flex;align-items:center;gap:26px}
  header.site-header .nav-link{
    position:relative;font-size:14px;line-height:1;padding:8px 0;
    color:rgba(255,255,255,.82);transition:color .2s ease;white-space:nowrap;
  }
  header.site-header .nav-link::after{
    content:'';position:absolute;left:0;bottom:0;height:2px;width:0;
    background:var(--accent);transition:width .2s ease;
  }
  header.site-header .nav-link:hover{color:#fff}
  header.site-header .nav-link:hover::after{width:100%}
  header.site-header .nav-link.active{color:#fff}
  header.site-header .nav-link.active::after{width:100%}
  header.site-header .header-actions{display:flex;align-items:center;gap:12px}
  .search-wrap{position:relative;display:flex;align-items:center;gap:8px}
  .search-box{width:0;overflow:hidden;transition:width .28s ease}
  .search-box.is-open{width:196px}
  .search-box input{
    width:196px;height:36px;border-radius:var(--radius-btn);
    border:1px solid var(--line);background:rgba(255,255,255,.92);
    padding:0 12px;font-size:13px;color:var(--ink);
  }
  .search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,61,46,.15)}
  .icon-btn{
    width:36px;height:36px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
    border:1px solid rgba(255,255,255,.34);color:#fff;transition:all .2s ease;
  }
  .icon-btn:hover{border-color:var(--accent);color:var(--accent)}
  .menu-btn{display:none;width:38px;height:38px;align-items:center;justify-content:center;border-radius:var(--radius-btn)}
  .menu-btn span{position:relative;display:block;width:18px;height:2px;background:currentColor;color:#fff;transition:background .2s}
  .menu-btn span::before,.menu-btn span::after{content:'';position:absolute;left:0;width:18px;height:2px;background:currentColor}
  .menu-btn span::before{top:-6px}
  .menu-btn span::after{top:6px}
  header.site-header.is-scrolled{
    background:rgba(251,250,247,.9);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom-color:var(--line);
  }
  header.site-header.is-scrolled .brand{color:var(--ink)}
  header.site-header.is-scrolled .nav-link{color:var(--ink-2)}
  header.site-header.is-scrolled .nav-link:hover{color:var(--primary)}
  header.site-header.is-scrolled .nav-link.active{color:var(--primary)}
  header.site-header.is-scrolled .icon-btn{border-color:var(--line);color:var(--ink)}
  header.site-header.is-scrolled .icon-btn:hover{border-color:var(--primary);color:var(--primary)}
  header.site-header.is-scrolled .menu-btn span,
  header.site-header.is-scrolled .menu-btn span::before,
  header.site-header.is-scrolled .menu-btn span::after{background:var(--ink);color:var(--ink)}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 22px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;white-space:nowrap;
    border:1px solid transparent;transition:all .2s ease;
  }
  .btn.btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn.btn-primary{background:var(--primary);color:#fff}
  .btn.btn-primary:hover{background:var(--primary-600)}
  .btn.btn-accent{background:var(--accent);color:var(--ink)}
  .btn.btn-accent:hover{background:#c8ef35}
  .btn.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
  .btn.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
  .btn.btn-outline{background:transparent;color:var(--primary);border-color:var(--line)}
  .btn.btn-outline:hover{border-color:var(--primary);background:rgba(15,61,46,.04)}
  .btn:active{transform:translateY(1px)}

  /* ============ 移动抽屉 ============ */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(14,18,20,.5);z-index:90;
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .site-drawer{
    position:fixed;top:0;right:0;bottom:0;width:320px;max-width:86vw;z-index:95;
    background:var(--paper);border-left:1px solid var(--line);
    transform:translateX(102%);transition:transform .3s ease;
    padding:24px 22px;overflow-y:auto;
  }
  .site-drawer.is-open{transform:translateX(0)}
  .site-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
  .site-drawer .drawer-brand{display:inline-flex;align-items:center;gap:8px;font-weight:700}
  .site-drawer .drawer-close{width:34px;height:34px;border:1px solid var(--line);border-radius:var(--radius-btn);display:flex;align-items:center;justify-content:center}
  .site-drawer .drawer-link{
    display:block;padding:13px 4px;font-size:15px;color:var(--ink-2);
    border-bottom:1px solid var(--line);transition:color .2s,padding-left .2s;
  }
  .site-drawer .drawer-link:hover,.site-drawer .drawer-link.active{color:var(--primary);padding-left:10px}
  .site-drawer .drawer-cta{margin-top:22px;width:100%}

  /* ============ 内页 Hero ============ */
  .page-hero{
    position:relative;color:#fff;overflow:hidden;
    background-color:var(--ink);
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center;
  }
  .page-hero::before{
    content:'';position:absolute;inset:0;
    background:linear-gradient(104deg,rgba(9,26,20,.95) 0%,rgba(9,26,20,.86) 46%,rgba(9,26,20,.58) 100%);
  }
  .page-hero > .container{position:relative;z-index:2}
  .page-hero-inner{padding-top:132px;padding-bottom:70px}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:22px}
  .breadcrumb a{color:rgba(255,255,255,.82);transition:color .2s}
  .breadcrumb a:hover{color:var(--accent)}
  .breadcrumb .sep{color:rgba(255,255,255,.36)}
  .breadcrumb .current{color:rgba(255,255,255,.62)}
  .hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 10px;
    font-size:12px;letter-spacing:.06em;border-radius:2px;
    background:rgba(214,248,76,.14);color:var(--accent);border:1px solid rgba(214,248,76,.35);
  }
  .hero-title{
    font-size:clamp(2rem,4.2vw,3.4rem);font-weight:800;line-height:1.08;
    letter-spacing:-.01em;color:#fff;max-width:16em;
  }
  .hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.78);max-width:34em}
  .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-points{display:flex;flex-wrap:wrap;gap:20px;margin-top:26px;font-size:13px;color:rgba(255,255,255,.7)}
  .hero-points li{display:flex;align-items:center;gap:8px}
  .hero-points li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
  .hero-figure{border-radius:var(--radius-card);overflow:hidden;border:1px solid rgba(255,255,255,.16)}
  .hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

  /* ============ 通用板块 ============ */
  .section{padding-top:88px;padding-bottom:88px}
  .section-tight{padding-top:64px;padding-bottom:64px}
  .section-head{max-width:720px;margin-bottom:44px}
  .section-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.14em;color:var(--primary);margin-bottom:14px;text-transform:uppercase;
  }
  .section-eyebrow::before{content:'';width:22px;height:2px;background:var(--primary)}
  .h2{font-size:clamp(1.6rem,2.6vw,2.4rem);font-weight:700;line-height:1.2;letter-spacing:-.005em}
  .section-desc{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-2)}
  .h3{font-size:1.15rem;font-weight:600;line-height:1.4}

  /* ============ 时间轴 ============ */
  .timeline{position:relative}
  .timeline::before{
    content:'';position:absolute;left:11px;top:10px;bottom:10px;width:1px;background:var(--line);
  }
  .tl-item{position:relative;padding-left:52px;padding-bottom:34px}
  .tl-item:last-child{padding-bottom:0}
  .tl-dot{
    position:absolute;left:4px;top:6px;width:15px;height:15px;border-radius:50%;
    background:var(--paper);border:2px solid var(--primary);
  }
  .tl-item:hover .tl-dot{background:var(--accent);border-color:var(--primary)}
  .tl-step{
    display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--primary);
    font-weight:700;margin-bottom:8px;
  }
  .tl-title{font-size:1.18rem;font-weight:600;line-height:1.4}
  .tl-text{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:52em}
  .tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
  .tag{
    display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:2px;
    font-size:12px;color:var(--ink-2);background:var(--paper-2);border:1px solid var(--line);
  }

  /* ============ 深色指标带 ============ */
  .metrics{background:var(--ink);color:#fff}
  .metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
  .metric{padding:38px 26px;border-left:1px solid rgba(255,255,255,.12)}
  .metric:first-child{border-left:0}
  .metric-num{font-size:clamp(2.2rem,4.4vw,3.4rem);line-height:1;font-weight:700;color:var(--accent)}
  .metric-label{margin-top:12px;font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.66)}

  /* ============ 场景图文交错 ============ */
  .scene{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;padding:38px 0;border-bottom:1px solid var(--line)}
  .scene:last-child{border-bottom:0}
  .scene-media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line)}
  .scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .scene-body p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--ink-2)}
  .scene-list{margin-top:16px;display:grid;gap:10px}
  .scene-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2)}
  .scene-list li::before{content:'';flex:none;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--accent);border:1px solid var(--primary)}

  /* ============ FAQ ============ */
  .faq-list{display:grid;gap:10px}
  .faq-item{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--paper);overflow:hidden;transition:border-color .25s ease}
  .faq-item:hover{border-color:#cfc9bc}
  .faq-item.is-open{border-color:#cfc9bc}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
  }
  .faq-ico{
    flex:none;position:relative;width:24px;height:24px;border-radius:50%;
    border:1px solid var(--line);transition:transform .26s ease,border-color .26s ease;
  }
  .faq-ico::before,.faq-ico::after{content:'';position:absolute;left:50%;top:50%;background:var(--primary);transform:translate(-50%,-50%)}
  .faq-ico::before{width:11px;height:1.5px}
  .faq-ico::after{width:1.5px;height:11px}
  .faq-item.is-open .faq-ico{transform:rotate(45deg);border-color:var(--primary)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
  .faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2)}

  /* ============ 浅底 CTA 带 ============ */
  .cta-band{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:38px 32px}
  .cta-band-inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
  .cta-title{font-size:clamp(1.35rem,2.2vw,1.85rem);font-weight:700;line-height:1.3}
  .cta-text{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:44em}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink);color:#E9E7E1;padding:64px 0 26px;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-bottom:34px}
  .footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff}
  .footer-desc{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(233,231,225,.68);max-width:34em}
  .site-footer h4{font-size:14px;font-weight:600;letter-spacing:.06em;color:#fff;margin-bottom:16px}
  .site-footer ul li{margin-bottom:10px}
  .site-footer ul a{font-size:14px;color:rgba(233,231,225,.7);transition:color .2s ease}
  .site-footer ul a:hover{color:var(--accent)}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    border-top:1px solid rgba(255,255,255,.08);padding-top:20px;
    font-size:13px;color:rgba(233,231,225,.6);
  }

  /* ============ 入场动效 ============ */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .42s ease,transform .42s ease}
  .reveal.is-in{opacity:1;transform:none}

  /* ============ 响应式 ============ */
  @media (max-width:1024px){
    .metrics-grid{grid-template-columns:repeat(2,1fr)}
    .metric{border-left:1px solid rgba(255,255,255,.12)}
    .metric:nth-child(2n+1){border-left:0}
    .metric:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12)}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
    .section{padding-top:72px;padding-bottom:72px}
  }
  @media (max-width:899px){
    header.site-header{height:56px}
    header.site-header .nav-desktop{display:none}
    .menu-btn{display:inline-flex}
    .search-wrap{display:none}
    .page-hero-inner{padding-top:104px;padding-bottom:56px}
    .scene{gap:22px}
  }
  @media (max-width:640px){
    .container{padding-left:20px;padding-right:20px}
    .hero-title{font-size:clamp(1.75rem,7.4vw,2.3rem)}
    .hero-sub{font-size:15.5px}
    .section{padding-top:56px;padding-bottom:56px}
    .section-tight{padding-top:48px;padding-bottom:48px}
    .footer-grid{grid-template-columns:1fr}
    .cta-band{padding:28px 20px}
    .tl-item{padding-left:44px}
    .metrics-grid{grid-template-columns:1fr 1fr}
    .metric{padding:28px 18px}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none;transition:none}
    *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  }