/* roulang page: index */
:root{
  --ink:#14161A;
  --ink-soft:#20242B;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --soft:#FBFAF7;
  --clay:#C0562F;
  --clay-dark:#A5461F;
  --jade:#2E6A60;
  --muted:#6A6E75;
  --line:#E3DFD8;
  --line-invert:rgba(255,255,255,.12);
  --radius:14px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(20,22,26,.05);
  --shadow-2:0 18px 40px -20px rgba(20,22,26,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--clay);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--clay-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.015em;line-height:1.2;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
figure{margin:0}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.grid-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px}
.section{padding:96px 0}
.section-tight{padding:0 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(26px,3vw,36px)}
.section-head .head-note{max-width:440px;color:var(--muted);font-size:14px;line-height:1.8}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--jade);text-transform:uppercase;margin-bottom:14px}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--clay);color:#F6F4F0}
.btn-primary:hover{background:var(--clay-dark);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{border-color:var(--clay);color:var(--clay);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn .arrow{transition:transform .2s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);position:relative}
.text-link::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--clay);transition:width .22s var(--ease)}
.text-link:hover{color:var(--clay)}
.text-link:hover::after{width:100%}

.pill{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  border:1px solid var(--jade);background:transparent;
  color:var(--jade);font-size:12px;line-height:1.5;letter-spacing:.02em;
}
.pill-clay{border-color:var(--clay);color:var(--clay)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,240,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:68px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:9px;
  background:var(--ink);color:var(--paper);
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
}
.brand-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{
  position:relative;color:var(--ink);font-size:14.5px;font-weight:500;padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--clay);
  transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--clay)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--clay)}
.nav-links a.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-cta{padding:11px 20px;font-size:14px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:9px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-drawer{display:none;border-top:1px solid var(--line);background:var(--paper)}
.nav-drawer.is-open{display:block}
.nav-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;height:52px;font-size:15px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.nav-drawer a::after{content:"›";color:var(--muted);font-size:18px;line-height:1}
.nav-drawer a.is-active{color:var(--clay)}

/* ---------- Hero ---------- */
.hero{padding:60px 0 0}
.hero-grid{align-items:flex-start}
.hero-left .pill{margin-bottom:22px}
.hero h1{
  font-size:clamp(38px,5vw,62px);
  line-height:1.08;
  letter-spacing:-.02em;
  max-width:15ch;
}
.hero-rule{display:block;width:64px;height:3px;background:var(--clay);margin:26px 0 22px;border-radius:2px}
.hero .lead{
  max-width:46ch;color:var(--muted);font-size:17px;line-height:1.8;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 30px}
.hero-metrics{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--muted);
  border-top:1px solid var(--line);padding-top:20px;
}
.hero-metrics b{font-family:var(--font-mono);color:var(--ink);font-weight:600;font-size:14px}
.hero-metrics .sep{color:var(--line)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  border-radius:12px;background:#EFEDE8;
  box-shadow:var(--shadow-1);
}
.hero-float{
  position:absolute;left:16px;bottom:16px;width:220px;
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:14px 16px;box-shadow:var(--shadow-1);
}
.hero-float div{display:flex;justify-content:space-between;align-items:baseline;gap:10px;font-size:12px;color:var(--muted)}
.hero-float div + div{margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
.hero-float b{font-family:var(--font-mono);font-size:13px;color:var(--ink);font-weight:600}

/* ---------- Stats ---------- */
.stats-band{margin-top:72px}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:34px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}
.stat .num{
  font-family:var(--font-mono);font-size:clamp(32px,4vw,46px);
  font-weight:600;line-height:1;letter-spacing:-.03em;color:var(--ink);
}
.stat .unit{font-size:14px;color:var(--jade);margin-left:6px;font-weight:500}
.stat .stat-label{margin-top:12px;font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- Matrix ---------- */
.matrix{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.matrix-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.panel-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.panel-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow-2)}
.panel-card .idx{
  position:absolute;top:24px;right:26px;
  font-family:var(--font-mono);font-size:13px;color:var(--muted);
  transition:color .22s var(--ease);
}
.panel-card:hover .idx{color:var(--clay)}
.panel-card h3{font-size:21px;margin-bottom:12px;max-width:20ch}
.panel-card p{font-size:14.5px;color:var(--muted);line-height:1.8;max-width:44ch}
.panel-card .card-foot{margin-top:auto;padding-top:24px}
.matrix-main{min-height:340px;justify-content:space-between}
.matrix-main .card-media{
  margin-top:20px;border-radius:10px;overflow:hidden;border:1px solid var(--line);
}
.matrix-main .card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EFEDE8;transition:transform .35s var(--ease)}
.panel-card:hover .card-media img{transform:scale(1.02)}
.strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-top:24px;
}
.strip .item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:24px;border-left:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
.strip .item:first-child{border-left:0;padding-left:0}
.strip .item:hover{background:var(--card)}
.strip .item strong{display:block;font-size:15px;font-weight:600;color:var(--ink)}
.strip .item span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.7}
.strip .item .arrow{color:var(--clay);font-family:var(--font-mono);flex:none;transition:transform .2s var(--ease)}
.strip .item:hover .arrow{transform:translateX(4px)}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{border-top:1px solid var(--ink);padding-top:22px}
.step .num{font-family:var(--font-mono);font-size:14px;color:var(--clay);letter-spacing:.08em}
.step h3{font-size:19px;margin:12px 0 10px}
.step p{font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- Compare ---------- */
.compare{
  background:var(--ink);color:var(--paper);
  border-radius:20px;padding:60px 48px 48px;position:relative;
}
.compare .section-head h2{color:var(--paper)}
.compare .head-note{color:rgba(246,244,240,.62)}
.compare-badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--clay);color:#FFF;font-size:12px;letter-spacing:.16em;
  padding:5px 16px;border-radius:999px;font-family:var(--font-mono);
}
.compare-grid{display:grid;grid-template-columns:1fr 1px 1fr;gap:0;align-items:stretch}
.compare-divider{background:var(--line-invert);width:1px}
.compare-col{padding:0 36px}
.compare-col:first-child{padding-left:0}
.compare-col:last-child{padding-right:0}
.compare-col h3{
  color:var(--paper);font-size:16px;letter-spacing:.02em;
  display:flex;align-items:center;gap:10px;margin-bottom:18px;
}
.compare-col h3 .marker{width:8px;height:8px;border-radius:2px;background:rgba(246,244,240,.35)}
.compare-col.is-after h3 .marker{background:var(--clay)}
.compare-list li{
  display:flex;align-items:center;gap:12px;
  padding:16px 0;font-size:14.5px;line-height:1.6;
  border-bottom:1px solid var(--line-invert);
  color:rgba(246,244,240,.72);
}
.compare-col.is-before .compare-list li .dot{width:6px;height:6px;flex:none;background:rgba(246,244,240,.28)}
.compare-col.is-after .compare-list li{color:var(--paper)}
.compare-col.is-after .compare-list li .dot{width:6px;height:6px;flex:none;background:var(--clay)}
.compare-col.is-after{border-left:0}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow-2)}
.news-card h3{
  font-size:19px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card h3 a{color:var(--ink);transition:color .2s var(--ease)}
.news-card:hover h3 a{color:var(--clay)}
.news-card p{
  font-size:14px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:16px;border-top:1px solid var(--line);
}
.news-foot time{font-family:var(--font-mono);font-size:13px;color:var(--muted)}
.news-foot .arrow-link{font-size:13px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.news-foot .arrow-link:hover{color:var(--clay)}
.news-foot .arrow-link .arrow{transition:transform .2s var(--ease)}
.news-card:hover .arrow-link .arrow{transform:translateX(4px)}
.empty-state{
  grid-column:1 / -1;min-height:160px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:40px;text-align:center;color:var(--muted);font-size:14px;
  border:1px dashed var(--line);border-radius:var(--radius);background:var(--soft);
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 0;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--clay)}
.faq-icon{
  flex:none;width:20px;height:20px;position:relative;
  font-family:var(--font-mono);color:var(--muted);font-size:0;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.faq-icon::before{left:0;top:9px;width:16px;height:1.5px}
.faq-icon::after{left:7.25px;top:2px;width:1.5px;height:16px}
.faq-item.is-open .faq-icon{color:var(--clay)}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{overflow:hidden;max-height:0;transition:max-height .22s var(--ease)}
.faq-a p{padding:0 0 24px 0;max-width:72ch;color:var(--muted);font-size:15px;line-height:1.85}

/* ---------- Contact ---------- */
.contact-wrap{
  background:var(--soft);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:96px 0;
}
.contact-left h2{font-size:clamp(26px,3vw,34px);margin-bottom:16px}
.contact-left p{color:var(--muted);font-size:15px;line-height:1.85;max-width:38ch}
.point-list{margin-top:28px;border-top:1px solid var(--line)}
.point-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 0;border-bottom:1px solid var(--line);
  font-size:14px;color:var(--ink);line-height:1.7;
}
.point-list li::before{
  content:"";width:6px;height:6px;flex:none;background:var(--clay);margin-top:8px;border-radius:1px;
}
.form-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-1)}
.field{margin-bottom:26px}
.field:last-of-type{margin-bottom:20px}
.field label{
  display:block;font-size:12px;font-weight:700;color:var(--ink);
  letter-spacing:.06em;margin-bottom:8px;
}
.field input,.field select,.field textarea{
  width:100%;border:0;border-bottom:1px solid var(--ink);
  background:transparent;border-radius:0;
  padding:10px 2px;font-family:inherit;font-size:16px;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  appearance:none;-webkit-appearance:none;
}
.field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 12px) 20px,calc(100% - 7px) 20px;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;
}
.field textarea{resize:vertical;min-height:92px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#A8ABB1}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-bottom-color:var(--clay);
  box-shadow:0 1px 0 0 var(--clay);
}
.form-foot{display:flex;align-items:center;justify-content:flex-end;gap:16px;flex-wrap:wrap;margin-top:8px}
.form-note{font-size:12.5px;color:var(--muted);margin-right:auto}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2.1fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:var(--paper);font-size:16px;font-weight:700;margin-bottom:16px}
.footer-brand:hover{color:var(--paper)}
.footer-brand .brand-mark{background:var(--clay);color:#FFF}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(246,244,240,.62);max-width:34ch}
.footer-social{display:flex;gap:18px;margin-top:20px}
.footer-social a{font-size:13px;color:rgba(246,244,240,.72)}
.footer-social a:hover{color:var(--clay)}
.footer-col h4{
  font-size:12px;font-weight:600;letter-spacing:.14em;color:rgba(246,244,240,.45);
  margin-bottom:18px;text-transform:uppercase;
}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{font-size:14px;color:rgba(246,244,240,.78)}
.footer-col ul li a:hover{color:var(--clay)}
.footer-info li{font-size:14px;color:rgba(246,244,240,.72);line-height:1.8;margin-bottom:10px}
.footer-info li b{font-family:var(--font-mono);color:var(--paper);font-weight:500}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid var(--line-invert);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:rgba(246,244,240,.5);
}
.footer-bottom a{color:rgba(246,244,240,.62)}
.footer-bottom a:hover{color:var(--paper)}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .section,.contact-wrap{padding:80px 0}
  .hero{padding-top:48px}
  .compare{padding:52px 36px 40px}
}
@media (max-width:991px){
  .nav-links{gap:24px}
  .matrix{grid-template-columns:1fr}
  .matrix-side{grid-template-rows:auto auto;grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr;gap:0}
  .step{border-top:1px solid var(--line);padding:20px 0}
  .step:first-child{border-top:1px solid var(--ink)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{padding:28px 24px}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .compare-grid{grid-template-columns:1fr;gap:0}
  .compare-divider{display:none}
  .compare-col{padding:0}
  .compare-col.is-before{padding-bottom:12px;border-bottom:1px solid var(--line-invert);margin-bottom:20px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-inner{height:60px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .grid-x{margin-left:-8px;margin-right:-8px}
  .grid-x>.cell{padding-left:8px;padding-right:8px}
  .section,.contact-wrap{padding:60px 0}
  .section-tight{padding:0 0 60px}
  .hero{padding-top:40px}
  .hero h1{font-size:clamp(32px,8vw,44px);max-width:none}
  .hero .lead{font-size:16px}
  .hero-media{margin-top:32px}
  .hero-media img{aspect-ratio:16/11}
  .hero-float{width:200px;left:12px;bottom:12px}
  .stats-band{margin-top:48px}
  .section-head{gap:16px;margin-bottom:26px}
  .section-head .head-note{max-width:none}
  .matrix-side{grid-template-columns:1fr}
  .strip{grid-template-columns:1fr}
  .strip .item{border-left:0;padding-left:0}
  .strip .item + .item{border-top:1px solid var(--line)}
  .compare{padding:44px 22px 32px;border-radius:16px}
  .news-grid{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:20px 0;gap:16px}
  .form-panel{padding:24px}
  .form-foot{justify-content:stretch}
  .form-note{width:100%;margin:0 0 6px}
  .form-foot .btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:480px){
  .hero-actions .btn{width:100%;justify-content:center}
  .hero-float{position:static;width:100%;margin-top:12px}
  .panel-card{padding:22px}
  .panel-card .idx{top:18px;right:20px}
  .stat .num{font-size:30px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .panel-card:hover,.news-card:hover,.btn:hover,.btn-ghost:hover{transform:none}
}

/* roulang page: article */
:root{
  --ink:#14161A;
  --ink-soft:#25282E;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --tint:#FBFAF7;
  --clay:#C0562F;
  --clay-dark:#A5461F;
  --jade:#2E6A60;
  --muted:#6A6E75;
  --line:#E3DFD8;
  --line-mid:rgba(20,22,26,.28);
  --radius-card:14px;
  --radius-img:10px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(20,22,26,.05);
  --shadow-2:0 18px 40px -20px rgba(20,22,26,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono","JetBrains 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(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;background:#EFEDE8;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
::selection{background:rgba(192,86,47,.18);color:var(--ink);}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,240,.94);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-shell{
  position:relative;
  display:flex;align-items:center;gap:34px;
  min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:9px;
  background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.1em;
}
.brand-text{font-size:16.5px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:30px;margin-left:auto;}
.nav-links a{
  position:relative;display:inline-block;
  padding:23px 0;font-size:15px;color:var(--muted);
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;
  background:var(--clay);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-tail{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-cta{padding:11px 20px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:var(--card);cursor:pointer;padding:0;
  transition:border-color .2s var(--ease);
}
.nav-toggle span{
  display:block;width:17px;height:1.5px;background:var(--ink);margin:2.5px auto;
  transition:transform .22s var(--ease),opacity .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-mid);}
.nav-toggle.is-active span:nth-child(1){transform:translateY(4px) rotate(45deg);}
.nav-toggle.is-active span:nth-child(2){opacity:0;}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-4px) rotate(-45deg);}

/* ============ 按钮与链接 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .18s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--clay);color:#FBF8F4;}
.btn-primary:hover{background:var(--clay-dark);color:#FFFFFF;transform:translateY(-1px);box-shadow:0 12px 24px -16px rgba(192,86,47,.85);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{background:transparent;border-color:var(--line-mid);color:var(--ink);}
.btn-ghost:hover{border-color:var(--clay);color:var(--clay);}
.btn:focus-visible{outline:2px solid var(--jade);outline-offset:2px;}
.link-line{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink);padding-bottom:2px;
}
.link-line::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.link-line:hover{color:var(--clay);}
.link-line:hover::after{transform:scaleX(1);}
.link-line:focus-visible{outline:2px solid var(--jade);outline-offset:3px;}

/* ============ 通用小组件 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  border:1px solid rgba(46,106,96,.42);
  font-size:12px;font-weight:600;line-height:1.6;
  color:var(--jade);background:transparent;white-space:nowrap;
}
.badge-clay{border-color:rgba(192,86,47,.4);color:var(--clay);}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 文章头部 ============ */
.article-head{padding:40px 0 0;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:24px;
}
.crumb a{transition:color .2s var(--ease);}
.crumb a:hover{color:var(--clay);}
.crumb .sep{color:#C9C4BB;}
.crumb .current{color:var(--ink);font-weight:600;}
.article-title{
  font-size:clamp(30px,4.4vw,44px);
  line-height:1.2;letter-spacing:-.02em;font-weight:700;
  margin:16px 0 20px;max-width:22em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  font-size:13px;color:var(--muted);
  padding-bottom:26px;border-bottom:1px solid var(--line);
}
.article-meta .dot{color:#C9C4BB;}
.article-meta .mono{font-size:13px;color:var(--ink-soft);}

/* ============ 正文排版 ============ */
.article-main{padding:44px 0 0;}
.prose{
  max-width:760px;margin:0 auto;
  font-size:17px;line-height:1.85;color:var(--ink-soft);
  word-break:break-word;
}
.prose p{margin:0 0 1.4em;}
.prose h2{
  position:relative;
  font-size:clamp(22px,2.4vw,28px);line-height:1.32;letter-spacing:-.01em;
  color:var(--ink);font-weight:700;
  margin:48px 0 16px;padding-left:18px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.22em;
  width:3px;height:1em;background:var(--clay);border-radius:2px;
}
.prose h3{
  font-size:21px;line-height:1.4;color:var(--ink);font-weight:700;
  margin:36px 0 12px;
}
.prose h4{
  font-size:17px;line-height:1.5;color:var(--ink);font-weight:700;
  margin:28px 0 10px;
}
.prose ul,.prose ol{margin:0 0 1.4em;padding-left:1.35em;}
.prose ul li{list-style:none;position:relative;padding-left:18px;margin-bottom:.62em;line-height:1.8;}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:6px;height:6px;background:var(--clay);border-radius:1px;
}
.prose ol{list-style:decimal;}
.prose ol li{margin-bottom:.62em;line-height:1.8;}
.prose blockquote{
  margin:28px 0;padding:20px 24px;
  border-left:3px solid var(--clay);
  background:var(--tint);border-radius:0 10px 10px 0;
  color:#4A4E55;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose a{color:var(--clay);border-bottom:1px solid rgba(192,86,47,.35);transition:border-color .2s var(--ease);}
.prose a:hover{border-bottom-color:var(--clay);}
.prose strong{color:var(--ink);font-weight:700;}
.prose img{border-radius:var(--radius-img);margin:28px auto;}
.prose figure{margin:28px 0;}
.prose figcaption{
  margin-top:10px;text-align:center;
  font-size:13px;color:var(--muted);
}
.prose code{
  font-family:var(--mono);font-size:.9em;
  background:#EFEDE8;color:#3A3E45;
  padding:2px 6px;border-radius:6px;
}
.prose pre{
  font-family:var(--mono);font-size:14px;line-height:1.7;
  background:#EFEDE8;border-radius:10px;
  padding:18px 20px;overflow-x:auto;margin:0 0 1.4em;
}
.prose pre code{background:none;padding:0;border-radius:0;}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:0 0 1.5em;}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;}
.prose th{background:var(--tint);font-weight:700;color:var(--ink);}
.prose hr{border:0;height:1px;background:var(--line);margin:40px 0;}

/* ============ 空态 ============ */
.empty-state{
  max-width:760px;margin:0 auto;
  border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--tint);padding:48px 32px;text-align:center;
}
.empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px;color:var(--ink);}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:22px;}

/* ============ 相关推荐 ============ */
.related{padding:72px 0 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:28px;padding-top:28px;border-top:1px solid var(--line);
}
.section-head h2{
  font-size:clamp(22px,2.6vw,30px);line-height:1.25;
  letter-spacing:-.01em;font-weight:700;color:var(--ink);
}
.section-head p{font-size:14px;color:var(--muted);max-width:34ch;text-align:right;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:24px;
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(20,22,26,.45);
  box-shadow:var(--shadow-2);
}
.card:hover .card-title{color:var(--clay);}
.card-title{
  font-size:19px;line-height:1.45;font-weight:700;color:var(--ink);
  transition:color .2s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.card-foot .mono{font-size:13px;color:var(--muted);}
.card-foot .arrow{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:999px;
  border:1px solid var(--line);color:var(--ink);
  transition:transform .22s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.card:hover .card-foot .arrow{transform:translateX(4px);border-color:var(--clay);color:var(--clay);}
.card:focus-visible{outline:2px solid var(--jade);outline-offset:3px;}

/* ============ 文末操作条 ============ */
.article-actions{
  max-width:760px;margin:48px auto 0;
  padding-top:28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.article-actions .back{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);}
.article-actions .back:hover{color:var(--clay);}
.article-actions .btn{min-width:180px;}

/* ============ 底部 CTA 条 ============ */
.cta-band{margin-top:88px;background:var(--ink);color:var(--paper);}
.cta-band .container{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:26px;padding-top:52px;padding-bottom:52px;
}
.cta-band h2{
  font-size:clamp(22px,2.8vw,30px);line-height:1.3;letter-spacing:-.01em;
  font-weight:700;margin-bottom:10px;
}
.cta-band p{font-size:14px;line-height:1.8;color:rgba(246,244,240,.68);max-width:48ch;}
.cta-band .btn-primary{box-shadow:none;}

/* ============ 页脚 ============ */
.site-footer{background:#14161A;color:var(--paper);padding:72px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.1fr;
  gap:44px;padding-bottom:52px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:11px;
  font-size:17px;font-weight:700;color:var(--paper);margin-bottom:16px;
}
.footer-brand .brand-mark{background:var(--paper);color:#14161A;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(246,244,240,.6);max-width:36ch;}
.footer-social{display:flex;flex-wrap:wrap;gap:18px;margin-top:20px;}
.footer-social a{font-size:13px;color:rgba(246,244,240,.72);transition:color .2s var(--ease);}
.footer-social a:hover{color:#E0895F;}
.footer-col h4{
  font-size:12px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:rgba(246,244,240,.45);
  margin:0 0 18px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{font-size:14px;color:rgba(246,244,240,.78);transition:color .2s var(--ease);}
.footer-col ul a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:4px;}
.footer-info li{font-size:14px;line-height:1.7;color:rgba(246,244,240,.66);}
.footer-info li b{color:var(--paper);font-family:var(--mono);font-weight:600;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px;padding:20px 0 24px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:12px;color:rgba(246,244,240,.48);
}
.footer-bottom a{color:rgba(246,244,240,.7);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom a:hover{color:#FFFFFF;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;gap:36px;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:991px){
  .container{padding:0 22px;}
  .nav-shell{min-height:60px;gap:20px;}
  .nav-links{gap:22px;}
  .nav-links a{font-size:14px;padding:19px 0;}
  .nav-links a::after{bottom:14px;}
  .brand-text{font-size:15.5px;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-head{padding-top:32px;}
  .related{padding-top:56px;}
  .cta-band{margin-top:68px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .section-head p{text-align:left;max-width:100%;}
}
@media (max-width:900px){
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;margin-left:0;
    background:#FFFFFF;border-bottom:1px solid var(--line);
    padding:6px 22px 14px;box-shadow:var(--shadow-2);
  }
  .nav-links.is-open{display:flex;}
  .nav-links a{
    padding:15px 0;font-size:15px;color:var(--ink);
    border-bottom:1px solid var(--line);width:100%;
  }
  .nav-links a:last-child{border-bottom:0;}
  .nav-links a::after{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-tail{margin-left:auto;}
  .nav-cta{display:none;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  body{font-size:15.5px;}
  .article-main{padding-top:32px;}
  .prose{font-size:16.5px;line-height:1.85;}
  .prose h2{margin-top:38px;}
  .grid-3{grid-template-columns:1fr;}
  .article-actions{flex-direction:column;align-items:stretch;}
  .article-actions .btn{width:100%;min-width:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-col:first-child{grid-column:1 / -1;}
  .footer-col:last-child{grid-column:1 / -1;}
  .site-footer{padding-top:56px;}
}
@media (max-width:520px){
  .nav-shell{min-height:56px;gap:14px;}
  .brand-mark{width:34px;height:34px;font-size:11px;}
  .brand-text{font-size:14.5px;}
  .article-title{font-size:clamp(26px,7vw,34px);}
  .article-meta{font-size:12px;gap:8px 12px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band .container{padding-top:40px;padding-bottom:40px;}
  .empty-state{padding:36px 22px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;transform:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --ink:#14161A;
  --paper:#F6F4F0;
  --surface:#FFFFFF;
  --surface-2:#FBFAF7;
  --accent:#C0562F;
  --accent-hover:#A5461F;
  --jade:#2E6A60;
  --muted:#6A6E75;
  --line:#E3DFD8;
  --reverse:#F6F4F0;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(20,22,26,.05);
  --shadow-2:0 18px 40px -20px rgba(20,22,26,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms;
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains 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;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.015em;line-height:1.22;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;padding:0;}
figure{margin:0;}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;}
::selection{background:rgba(192,86,47,.18);}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  border:1px solid transparent;
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),
             border-color var(--t) var(--ease),transform var(--t) var(--ease);
}
.btn-primary{background:var(--accent);color:#FFF;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.btn-ghost:active{transform:translateY(1px);}
.btn-line{background:transparent;color:var(--reverse);border-color:rgba(246,244,240,.42);}
.btn-line:hover{border-color:var(--accent);color:var(--accent);}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.text-link:hover{color:var(--accent);border-bottom-color:var(--accent);}

/* ============ 徽章 ============ */
.badge{
  display:inline-block;
  font-size:12px;
  line-height:1.5;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid var(--jade);
  color:var(--jade);
  background:transparent;
  letter-spacing:.04em;
}
.badge-accent{border-color:var(--accent);color:var(--accent);}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(246,244,240,.94);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  height:68px;
  position:relative;
}
.nav-left{display:flex;align-items:center;gap:36px;min-width:0;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:8px;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  flex:none;
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{
  position:relative;
  font-size:15px;
  color:#43474E;
  padding:6px 0;
  transition:color var(--t) var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t) 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:600;}
.nav-right{display:flex;align-items:center;gap:14px;}
.nav-right .btn{padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--surface);
  cursor:pointer;
  transition:border-color var(--t) var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);}
.nav-toggle span{
  display:block;width:16px;height:1.5px;background:var(--ink);position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding-top:28px;
}
.breadcrumb a{color:var(--muted);transition:color var(--t) var(--ease);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:#C7C2B9;}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ============ Hero ============ */
.hero{padding:26px 0 84px;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.26fr) minmax(0,.92fr);
  gap:56px;
  align-items:start;
  margin-top:36px;
}
.hero-copy{animation:riseIn 420ms var(--ease) both;}
.hero-title{
  font-size:clamp(34px,4.5vw,56px);
  line-height:1.12;
  letter-spacing:-.02em;
  margin:20px 0 0;
  max-width:15em;
}
.rule{
  display:block;
  width:64px;height:3px;
  background:var(--accent);
  margin:24px 0 22px;
  border-radius:2px;
}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:#4C5057;
  max-width:34em;
  margin:0 0 28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-metrics{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin:30px 0 0;
  font-size:13px;
  color:var(--muted);
  font-family:var(--font-mono);
  letter-spacing:.01em;
}
.hero-metrics i{color:#C7C2B9;font-style:normal;}

.hero-visual{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  background:#EFEDE8;
  box-shadow:var(--shadow-1);
  animation:riseIn 520ms 80ms var(--ease) both;
}
.hero-visual img{
  width:100%;
  aspect-ratio:4/5;
  object-fit:cover;
}
.hero-card{
  position:absolute;
  left:16px;bottom:16px;
  width:min(220px,calc(100% - 32px));
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  padding:14px 16px;
  box-shadow:var(--shadow-1);
}
.hero-card-label{
  display:block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--jade);
  font-family:var(--font-mono);
  margin-bottom:6px;
}
.hero-card p{font-size:13px;line-height:1.6;color:#4C5057;margin:0;}

@keyframes riseIn{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:translateY(0);}
}

/* ============ 指标条 ============ */
.metrics{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:34px 28px;border-left:1px solid var(--line);}
.metric:first-child{border-left:none;}
.metric-num{
  font-family:var(--font-mono);
  font-size:clamp(30px,3.3vw,44px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--ink);
}
.metric-unit{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--jade);
  margin-left:6px;
}
.metric-desc{
  display:block;
  margin-top:12px;
  font-size:13px;
  line-height:1.6;
  color:var(--muted);
}

/* ============ 板块通用 ============ */
.section{padding:96px 0;}
.section + .section{padding-top:0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:48px;
  margin-bottom:40px;
}
.section-head h2{
  font-size:clamp(25px,3vw,34px);
  letter-spacing:-.02em;
  line-height:1.2;
  max-width:16em;
}
.section-head .head-note{
  max-width:420px;
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
  margin:0;
}
.eyebrow{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--jade);
  margin-bottom:14px;
}

/* ============ 通行路径 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.step{
  padding:32px 26px 36px;
  border-left:1px solid var(--line);
  transition:background-color var(--t) var(--ease);
}
.step:first-child{border-left:none;}
.step:hover{background:var(--surface);}
.step-num{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  color:var(--jade);
}
.step h3{
  font-size:19px;
  margin:14px 0 10px;
}
.step p{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  margin:0 0 14px;
}
.step ul li{
  position:relative;
  padding-left:14px;
  font-size:13px;
  line-height:1.8;
  color:#4C5057;
}
.step ul li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:6px;height:6px;
  border-radius:1px;
  background:var(--accent);
}

/* ============ 适用场景（非对称） ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(20,22,26,.34);
  box-shadow:var(--shadow-2);
}
.scene-main{
  grid-column:span 7;
  padding:30px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.scene-main .card-top{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
}
.card-index{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  color:#A9A49B;
  transition:color var(--t) var(--ease);
}
.card:hover .card-index{color:var(--accent);}
.scene-main img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:10px;
  background:#EFEDE8;
}
.scene-main h3{font-size:22px;}
.scene-main p{font-size:15px;line-height:1.85;color:var(--muted);margin:0;}
.scene-side{
  grid-column:span 5;
  display:grid;
  gap:24px;
}
.scene-side .card{padding:26px;display:flex;flex-direction:column;gap:12px;}
.scene-side h3{font-size:19px;}
.scene-side p{font-size:14px;line-height:1.8;color:var(--muted);margin:0;}

.listbar{
  grid-column:span 12;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  overflow:hidden;
}
.listbar-item{
  padding:24px 26px;
  border-left:1px solid var(--line);
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  transition:background-color var(--t) var(--ease);
}
.listbar-item:first-child{border-left:none;}
.listbar-item:hover{background:var(--surface-2);}
.listbar-item h4{font-size:15px;margin:0 0 6px;}
.listbar-item p{font-size:13px;line-height:1.7;color:var(--muted);margin:0;}
.arrow{
  flex:none;
  font-family:var(--font-mono);
  color:var(--accent);
  transition:transform var(--t) var(--ease);
}
.listbar-item:hover .arrow{transform:translateX(6px);}

/* ============ 对比 ============ */
.compare{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  align-items:stretch;
}
.compare-col{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:32px 30px;
  background:var(--surface-2);
}
.compare-col.is-after{
  background:var(--surface);
  border-color:var(--accent);
  box-shadow:var(--shadow-1);
}
.compare-col h3{
  font-size:19px;
  display:flex;align-items:center;gap:10px;
  margin-bottom:6px;
}
.compare-col .compare-tag{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.compare-col.is-after .compare-tag{color:var(--jade);}
.compare-list{margin-top:22px;}
.compare-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:15px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  line-height:1.75;
  color:#41454C;
}
.compare-list li:last-child{border-bottom:none;}
.sq{
  flex:none;
  width:6px;height:6px;
  margin-top:11px;
  border-radius:1px;
  background:#B9B4AB;
}
.is-after .sq{background:var(--accent);}

/* ============ 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:24px;
  padding:24px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  transition:color var(--t) var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  flex:none;
  width:26px;height:26px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:50%;
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--muted);
  transition:border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.faq-q:hover .faq-icon{border-color:var(--accent);color:var(--accent);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 240ms var(--ease);
}
.faq-a p{
  margin:0 0 24px;
  padding-left:0;
  font-size:15px;
  line-height:1.85;
  color:#4C5057;
  max-width:72ch;
}

/* ============ CTA / 表单 ============ */
.cta-band{
  background-color:#14161A;
  background-image:linear-gradient(rgba(20,22,26,.93),rgba(20,22,26,.97)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  color:var(--reverse);
  padding:88px 0;
}
.cta-grid{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:64px;
  align-items:start;
}
.cta-band h2{
  font-size:clamp(25px,3vw,34px);
  color:var(--reverse);
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.cta-band .lead{
  font-size:15px;
  line-height:1.85;
  color:rgba(246,244,240,.72);
  margin-bottom:26px;
  max-width:34em;
}
.cta-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  line-height:1.9;
  color:rgba(246,244,240,.8);
}
.cta-points li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:1px;
  background:var(--accent);
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px 28px;
}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1 / -1;}
.field label{
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:rgba(246,244,240,.62);
}
.field input,
.field select,
.field textarea{
  width:100%;
  background:transparent;
  border:0;
  border-bottom:1px solid rgba(246,244,240,.28);
  border-radius:0;
  color:var(--reverse);
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.6;
  padding:9px 0;
  transition:border-color var(--t) var(--ease),border-width var(--t) var(--ease);
  appearance:none;
}
.field textarea{resize:vertical;min-height:82px;}
.field input::placeholder,
.field textarea::placeholder{color:rgba(246,244,240,.34);}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-bottom:2px solid var(--accent);
  padding-bottom:8px;
}
.field select option{color:#14161A;background:#FFFFFF;}
.form-actions{
  grid-column:1 / -1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  margin-top:6px;
}
.form-hint{font-size:13px;color:rgba(246,244,240,.5);margin:0;}
.form-status{
  grid-column:1 / -1;
  font-size:13px;
  color:var(--jade);
  background:rgba(46,106,96,.16);
  border:1px solid rgba(46,106,96,.5);
  border-radius:10px;
  padding:12px 16px;
  display:none;
}
.form-status.is-on{display:block;}

/* ============ 页脚 ============ */
.site-footer{
  background:#14161A;
  color:var(--reverse);
  padding:72px 0 34px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.25fr;
  gap:44px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:700;
  margin-bottom:16px;
}
.footer-brand .brand-mark{background:var(--reverse);color:var(--ink);}
.footer-desc{
  font-size:14px;
  line-height:1.85;
  color:rgba(246,244,240,.62);
  margin:0 0 20px;
  max-width:34em;
}
.footer-social{display:flex;flex-wrap:wrap;gap:18px;}
.footer-social a{
  font-size:13px;
  color:rgba(246,244,240,.72);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.footer-social a:hover{color:var(--accent);border-bottom-color:var(--accent);}
.footer-col h4{
  font-size:13px;
  letter-spacing:.1em;
  color:rgba(246,244,240,.5);
  font-weight:600;
  margin:0 0 18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{
  font-size:14px;
  color:rgba(246,244,240,.78);
  transition:color var(--t) var(--ease);
}
.footer-col ul li a:hover{color:var(--accent);}
.footer-info li{
  font-size:14px;
  color:rgba(246,244,240,.68);
  line-height:1.8;
}
.footer-info b{color:var(--reverse);font-family:var(--font-mono);font-weight:600;}
.footer-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12px;
  color:rgba(246,244,240,.5);
}
.footer-bottom a{color:rgba(246,244,240,.66);border-bottom:1px solid transparent;transition:color var(--t) var(--ease);}
.footer-bottom a:hover{color:var(--accent);border-bottom-color:var(--accent);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .scene-main{grid-column:span 12;}
  .scene-side{grid-column:span 12;grid-template-columns:1fr 1fr;}
  .cta-grid{gap:44px;}
  .section{padding:80px 0;}
}

@media (max-width:991px){
  .nav-links{gap:20px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-visual{max-width:520px;}
  .hero-visual img{aspect-ratio:16/10;}
  .steps{grid-template-columns:1fr 1fr;}
  .step{border-top:1px solid var(--line);}
  .step:nth-child(1),.step:nth-child(2){border-top:none;}
  .step:nth-child(3){border-left:none;}
  .compare{grid-template-columns:1fr;}
  .cta-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .section{padding:72px 0;}
}

@media (max-width:860px){
  .nav-inner{height:60px;}
  .nav-toggle{display:inline-flex;}
  .nav-right .btn{display:none;}
  .nav-left{gap:16px;}
  .nav-links{
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--surface);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-1);
    max-height:0;
    overflow:hidden;
    transition:max-height var(--t) var(--ease);
  }
  .nav-links.is-open{max-height:260px;}
  .nav-links a{
    display:flex;
    align-items:center;
    height:52px;
    padding:0 24px;
    border-bottom:1px solid var(--line);
    font-size:15px;
  }
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--accent);}
  .metrics-grid{grid-template-columns:1fr 1fr;}
  .metric{padding:26px 20px;border-top:1px solid var(--line);}
  .metric:nth-child(1),.metric:nth-child(2){border-top:none;}
  .metric:nth-child(3){border-left:none;}
  .listbar{grid-template-columns:1fr;}
  .listbar-item{border-left:none;border-top:1px solid var(--line);}
  .listbar-item:first-child{border-top:none;}
  .form-grid{grid-template-columns:1fr;}
}

@media (max-width:767px){
  .container{padding:0 20px;}
  .hero{padding:16px 0 64px;}
  .hero-title{font-size:clamp(30px,7.4vw,38px);}
  .hero-sub{font-size:16px;}
  .scene-side{grid-template-columns:1fr;}
  .scene-main{padding:24px;}
  .compare-col{padding:26px 22px;}
  .cta-band{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .section{padding:56px 0;}
  .section + .section{padding-top:0;}
  .section-head{margin-bottom:28px;}
}

@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .metrics-grid{grid-template-columns:1fr;}
  .metric{border-left:none;}
  .metric + .metric{border-top:1px solid var(--line);}
  .steps{grid-template-columns:1fr;}
  .step{border-left:none !important;border-top:1px solid var(--line);}
  .step:first-child{border-top:none;}
  .faq-q{font-size:16px;gap:16px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.step:hover,.listbar-item:hover .arrow,.btn:hover{transform:none !important;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --ink:#14161A;
  --ink-soft:#2A2D33;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --soft:#FBFAF7;
  --accent:#C0562F;
  --accent-hover:#A5461F;
  --jade:#2E6A60;
  --muted:#6A6E75;
  --line:#E3DFD8;
  --rev:#F6F4F0;
  --radius-card:14px;
  --radius-img:10px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(20,22,26,.05);
  --shadow-2:0 18px 40px -20px rgba(20,22,26,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:200ms;
  --sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --container:1200px;
  --gutter:24px;
}

/* ============ 基础重置 ============ */
*,*::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(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* 覆盖 Foundation 默认视觉 */
a{color:inherit;}
a:hover{color:var(--accent);}
button,.button{background:none;border:0;border-radius:0;color:inherit;padding:0;margin:0;font-size:inherit;}
.grid-x{margin-left:auto;margin-right:auto;}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--accent);color:var(--rev);}
.btn-primary:hover{background:var(--accent-hover);color:var(--rev);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.btn-sm{padding:10px 18px;font-size:13.5px;}
.btn .arrow{transition:transform var(--dur) var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}

/* 文字链 */
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink);
  position:relative;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;
  background:var(--accent);transition:width var(--dur) var(--ease);
}
.text-link:hover{color:var(--accent);}
.text-link:hover::after{width:100%;}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;line-height:1;
  padding:5px 10px;border-radius:999px;
  border:1px solid var(--jade);color:var(--jade);
  background:transparent;letter-spacing:.02em;
}
.badge-dot::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--jade);margin-right:6px;
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,240,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:68px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:700;font-size:16px;letter-spacing:-.01em;
  color:var(--ink);flex-shrink:0;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  background:var(--ink);color:var(--rev);
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;font-weight:600;
}
.brand-text{white-space:nowrap;}
.nav-links{
  display:flex;align-items:center;gap:26px;
  margin-left:8px;flex:1 1 auto;
}
.nav-links a{
  position:relative;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  padding:6px 0;
  transition:color var(--dur) var(--ease);
  white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width var(--dur) var(--ease);
}
.nav-links a:hover{color:var(--accent);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--ink);font-weight:700;}
.nav-links a.is-active::after{width:100%;background:var(--ink);}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:var(--card);color:var(--ink);
  align-items:center;justify-content:center;font-size:16px;
  transition:border-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);}

/* ============ Hero ============ */
.page-hero{
  padding:64px 0 72px;
  border-bottom:1px solid var(--line);
}
.hero-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.hero-copy .badge{margin-bottom:22px;}
.hero-copy h1{
  font-size:clamp(32px,4vw,52px);
  line-height:1.14;
  letter-spacing:-.02em;
  font-weight:700;
  margin-bottom:20px;
}
.hero-rule{
  width:64px;height:3px;background:var(--accent);
  margin-bottom:22px;border-radius:2px;
}
.hero-sub{
  font-size:17px;line-height:1.8;color:var(--muted);
  max-width:44ch;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-metrics{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
}
.hero-metrics span b{
  font-family:var(--mono);color:var(--ink);font-weight:600;margin-right:4px;
}
.hero-metrics .sep{color:var(--line);}
.hero-figure{position:relative;}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:12px;background:#EFEDE8;
  border:1px solid var(--line);
}
.hero-note{
  position:absolute;left:18px;bottom:18px;
  width:min(250px,72%);
  background:var(--card);border:1px solid var(--line);
  border-radius:10px;padding:14px 16px;
  box-shadow:var(--shadow-1);
}
.hero-note .num{
  font-family:var(--mono);font-size:20px;font-weight:600;color:var(--ink);
  display:block;line-height:1.2;
}
.hero-note .num em{font-style:normal;font-size:12px;color:var(--jade);margin-left:3px;}
.hero-note p{font-size:12px;color:var(--muted);line-height:1.6;margin-top:4px;}

/* ============ 板块通用 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:40px;margin-bottom:40px;
}
.section-head h2{
  font-size:clamp(25px,2.8vw,34px);
  line-height:1.22;letter-spacing:-.02em;font-weight:700;
}
.section-head .head-desc{
  max-width:44ch;font-size:14px;line-height:1.8;color:var(--muted);
}
.section-kicker{
  display:block;font-family:var(--mono);font-size:12px;
  letter-spacing:.14em;color:var(--jade);margin-bottom:12px;text-transform:uppercase;
}

/* ============ 指标条 ============ */
.metrics-band{
  border-bottom:1px solid var(--line);
  background:var(--paper);
}
.metrics-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
}
.metric-cell{
  padding:38px 26px;
  border-left:1px solid var(--line);
}
.metric-cell:first-child{border-left:0;padding-left:0;}
.metric-num{
  font-family:var(--mono);font-size:clamp(30px,3.4vw,44px);
  font-weight:600;line-height:1;letter-spacing:-.02em;color:var(--ink);
}
.metric-num em{font-style:normal;font-size:14px;color:var(--jade);margin-left:4px;font-weight:500;}
.metric-label{font-size:13px;color:var(--muted);margin-top:12px;line-height:1.6;}

/* ============ 清单（纵向行） ============ */
.checklist{border-top:1px solid var(--line);}
.check-item{
  border-bottom:1px solid var(--line);
  transition:background-color var(--dur) var(--ease);
}
.check-row{
  display:grid;
  grid-template-columns:78px 1fr auto;
  gap:24px;
  align-items:center;
  padding:30px 4px;
  width:100%;
  text-align:left;
  background:transparent;
  transition:background-color var(--dur) var(--ease);
}
.check-row:hover{background:var(--card);}
.check-index{
  font-family:var(--mono);font-size:26px;font-weight:600;
  color:var(--jade);line-height:1;letter-spacing:-.02em;
  transition:color var(--dur) var(--ease);
}
.check-row:hover .check-index{color:var(--accent);}
.check-title{
  font-size:20px;font-weight:700;letter-spacing:-.01em;
  line-height:1.4;margin-bottom:6px;color:var(--ink);
}
.check-brief{font-size:14px;color:var(--muted);line-height:1.7;max-width:70ch;}
.check-meta{
  display:flex;align-items:center;gap:14px;
}
.check-tag{
  font-size:12px;color:var(--jade);border:1px solid var(--line);
  border-radius:999px;padding:4px 10px;white-space:nowrap;
}
.check-arrow{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);display:inline-flex;
  align-items:center;justify-content:center;color:var(--ink);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
  flex-shrink:0;
}
.check-row:hover .check-arrow{
  transform:translateX(6px);border-color:var(--accent);color:var(--accent);
}
.check-more{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows 240ms var(--ease);
}
.check-more > div{overflow:hidden;}
.check-item.is-open .check-more{grid-template-rows:1fr;}
.check-more-inner{
  padding:0 4px 30px 102px;
  font-size:15px;line-height:1.85;color:var(--muted);
  max-width:82ch;
}
.check-more-inner strong{color:var(--ink);font-weight:600;}
.check-item.is-open{background:var(--card);}

/* ============ 流程路径 ============ */
.path-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.path-step{
  padding:34px 26px 36px;
  border-left:1px solid var(--line);
  position:relative;
  transition:background-color var(--dur) var(--ease);
}
.path-step:first-child{border-left:0;}
.path-step:hover{background:var(--card);}
.path-step .step-no{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  color:var(--jade);margin-bottom:16px;display:block;
}
.path-step h3{font-size:18px;font-weight:700;margin-bottom:10px;letter-spacing:-.01em;}
.path-step p{font-size:14px;line-height:1.8;color:var(--muted);}
.path-step::after{
  content:"";position:absolute;left:26px;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width 240ms var(--ease);
}
.path-step:hover::after{width:calc(100% - 52px);}

/* ============ 对比面板 ============ */
.compare-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  position:relative;
}
.compare-card{
  padding:36px 34px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--soft);
}
.compare-card.good{background:var(--card);border-color:var(--accent);}
.compare-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.compare-head h3{font-size:19px;font-weight:700;letter-spacing:-.01em;}
.compare-head .tag{
  font-size:12px;color:var(--muted);border:1px solid var(--line);
  padding:4px 10px;border-radius:999px;
}
.compare-card.good .compare-head .tag{color:var(--accent);border-color:var(--accent);}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 0;border-bottom:1px solid var(--line);
  font-size:14.5px;line-height:1.75;color:var(--ink-soft);
}
.compare-list li:last-child{border-bottom:0;}
.compare-list li::before{
  content:"";width:6px;height:6px;border-radius:1px;
  background:var(--line);margin-top:9px;flex-shrink:0;
}
.compare-card.good .compare-list li::before{background:var(--accent);}
.compare-divider{
  position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--line);
  transform:translateX(-.5px);
}
.compare-badge{
  position:absolute;left:50%;top:-14px;transform:translateX(-50%);
  background:var(--paper);border:1px solid var(--line);
  border-radius:999px;padding:5px 12px;font-size:12px;color:var(--muted);
  z-index:2;
}
.compare-gap{height:1px;}
.compare-grid > .compare-card:first-child{margin-right:24px;}
.compare-grid > .compare-card:last-child{margin-left:24px;}

/* ============ 深色看板 ============ */
.hud{
  background:var(--ink);
  color:var(--rev);
  border-radius:var(--radius-card);
  padding:48px;
  display:grid;grid-template-columns:1fr 1.15fr;gap:48px;
  align-items:center;
}
.hud h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.25;
  letter-spacing:-.02em;margin-bottom:16px;color:var(--rev);
}
.hud p{font-size:14.5px;line-height:1.85;color:rgba(246,244,240,.68);max-width:38ch;}
.hud-rows{display:flex;flex-direction:column;gap:12px;}
.hud-row{
  display:grid;grid-template-columns:64px 1fr auto;gap:16px;align-items:center;
  padding:16px 18px;
  background:rgba(246,244,240,.05);
  border:1px solid rgba(246,244,240,.14);
  border-radius:10px;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.hud-row:hover{background:rgba(246,244,240,.09);border-color:rgba(246,244,240,.3);}
.hud-row .lv{
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  color:var(--rev);border:1px solid rgba(246,244,240,.3);
  border-radius:999px;padding:4px 8px;text-align:center;
}
.hud-row.lv-high .lv{background:var(--accent);border-color:var(--accent);}
.hud-row .txt{font-size:14.5px;line-height:1.6;color:var(--rev);}
.hud-row .txt small{display:block;font-size:12.5px;color:rgba(246,244,240,.55);margin-top:2px;}
.hud-row .act{font-size:12.5px;color:rgba(246,244,240,.6);font-family:var(--mono);white-space:nowrap;}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;text-align:left;display:flex;align-items:center;
  justify-content:space-between;gap:24px;
  padding:24px 4px;font-size:18px;font-weight:600;
  color:var(--ink);letter-spacing:-.01em;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  width:22px;height:22px;flex-shrink:0;position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);
  transition:transform 220ms var(--ease),opacity 220ms var(--ease),background-color var(--dur) var(--ease);
}
.faq-icon::before{left:0;top:10px;width:22px;height:1.5px;}
.faq-icon::after{left:10px;top:0;width:1.5px;height:22px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-item.is-open .faq-icon::before{background:var(--accent);}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows 220ms var(--ease);
}
.faq-a > div{overflow:hidden;}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a p{
  padding:0 4px 26px;font-size:15px;line-height:1.85;
  color:var(--muted);max-width:72ch;
}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--ink);color:var(--rev);
  border-radius:var(--radius-card);
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  flex-wrap:wrap;
}
.cta-band h2{
  font-size:clamp(23px,2.6vw,32px);line-height:1.28;
  letter-spacing:-.02em;margin-bottom:12px;color:var(--rev);
}
.cta-band p{font-size:14.5px;line-height:1.8;color:rgba(246,244,240,.66);max-width:48ch;}
.cta-band .btn-primary{flex-shrink:0;}

/* ============ 表单区 ============ */
.contact-section{background:var(--soft);border-top:1px solid var(--line);}
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;}
.contact-copy h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.26;
  letter-spacing:-.02em;margin-bottom:18px;
}
.contact-copy p{font-size:15px;line-height:1.85;color:var(--muted);margin-bottom:26px;}
.contact-points li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;line-height:1.75;color:var(--ink-soft);
  padding:11px 0;border-bottom:1px solid var(--line);
}
.contact-points li::before{
  content:"";width:6px;height:6px;background:var(--accent);
  border-radius:1px;margin-top:8px;flex-shrink:0;
}
.form-field{margin-bottom:26px;}
.form-field label{
  display:block;font-size:12px;font-weight:700;
  letter-spacing:.06em;color:var(--ink-soft);margin-bottom:8px;
}
.form-field input,
.form-field select,
.form-field textarea{
  width:100%;padding:10px 2px;border:0;border-bottom:1px solid var(--line);
  background:transparent;color:var(--ink);font-family:inherit;font-size:15px;
  border-radius:0;box-shadow:none;transition:border-color var(--dur) var(--ease);
  appearance:none;-webkit-appearance:none;
}
.form-field select{background-image:none;}
.form-field textarea{resize:vertical;min-height:88px;}
.form-field input::placeholder,
.form-field textarea::placeholder{color:#A9A69F;}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus{
  outline:none;border-bottom:2px solid var(--accent);padding-bottom:9px;
}
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible{outline:none;}
.form-two{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
.form-foot{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
}
.form-note{font-size:13px;color:var(--muted);line-height:1.7;}
.form-foot .btn{min-width:180px;justify-content:center;}
.form-tips{
  margin-top:14px;font-size:13px;color:var(--jade);
  min-height:20px;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);color:var(--rev);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:48px;padding-bottom:56px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:var(--rev);margin-bottom:16px;
}
.footer-brand:hover{color:var(--rev);}
.footer-brand .brand-mark{background:var(--rev);color:var(--ink);}
.footer-desc{
  font-size:14px;line-height:1.8;color:rgba(246,244,240,.6);
  max-width:34ch;margin-bottom:20px;
}
.footer-social{display:flex;flex-wrap:wrap;gap:18px;}
.footer-social a{
  font-size:13.5px;color:rgba(246,244,240,.72);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-social a:hover{color:var(--rev);border-color:var(--accent);}
.footer-col h4{
  font-size:13px;font-weight:700;letter-spacing:.1em;
  color:rgba(246,244,240,.5);margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{
  font-size:14px;color:rgba(246,244,240,.8);
  transition:color var(--dur) var(--ease);
}
.footer-col ul li a:hover{color:var(--rev);}
.footer-info li{
  font-size:13.5px;color:rgba(246,244,240,.62);line-height:1.7;
}
.footer-info b{color:var(--rev);font-family:var(--mono);font-weight:500;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;
  font-size:12px;color:rgba(246,244,240,.5);
}
.footer-bottom a{color:rgba(246,244,240,.72);}
.footer-bottom a:hover{color:var(--rev);}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(8px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .hud{grid-template-columns:1fr;gap:32px;padding:40px;}
  .section{padding:78px 0;}
}

@media (max-width:1024px){
  .header-inner{height:62px;gap:18px;}
  .nav-links{gap:18px;}
  .brand-text{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-figure img{aspect-ratio:16/10;}
  .metrics-grid{grid-template-columns:repeat(2,1fr);}
  .metric-cell{border-left:1px solid var(--line);padding:30px 22px;}
  .metric-cell:nth-child(odd){border-left:0;padding-left:0;}
  .metric-cell:nth-child(n+3){border-top:1px solid var(--line);}
  .path-grid{grid-template-columns:repeat(2,1fr);}
  .path-step:nth-child(odd){border-left:0;}
  .path-step:nth-child(n+3){border-top:1px solid var(--line);}
  .compare-grid{grid-template-columns:1fr;}
  .compare-grid > .compare-card:first-child{margin-right:0;margin-bottom:20px;}
  .compare-grid > .compare-card:last-child{margin-left:0;}
  .compare-divider{display:none;}
  .compare-badge{display:none;}
  .contact-grid{grid-template-columns:1fr;gap:44px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}

@media (max-width:860px){
  .nav-toggle{display:inline-flex;}
  .header-actions{display:none;}
  .nav-links{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    padding:8px var(--gutter) 16px;
    box-shadow:var(--shadow-2);
  }
  .nav-links.is-open{display:flex;}
  .nav-links a{
    padding:15px 0;border-bottom:1px solid var(--line);
    font-size:15px;
  }
  .nav-links a:last-child{border-bottom:0;}
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--accent);}
}

@media (max-width:768px){
  :root{--gutter:20px;}
  .section{padding:60px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:30px;}
  .page-hero{padding:44px 0 52px;}
  .hero-copy h1{font-size:clamp(28px,7vw,36px);}
  .hero-sub{font-size:15.5px;}
  .check-row{grid-template-columns:52px 1fr;gap:16px;padding:24px 0;}
  .check-index{font-size:20px;}
  .check-title{font-size:17.5px;}
  .check-meta{display:none;}
  .check-more-inner{padding:0 0 24px 52px;font-size:14.5px;}
  .hud{padding:30px 24px;}
  .hud-row{grid-template-columns:58px 1fr;gap:12px;}
  .hud-row .act{display:none;}
  .faq-q{font-size:16px;padding:20px 0;}
  .cta-band{padding:34px 26px;flex-direction:column;align-items:flex-start;gap:24px;}
  .form-two{grid-template-columns:1fr;gap:0;}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px;}
  .site-footer{padding-top:56px;}
  .hero-note{position:static;width:100%;margin-top:-28px;margin-left:14px;box-shadow:var(--shadow-1);}
}

@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{justify-content:center;}
  .hero-metrics{font-size:12px;gap:6px;}
  .metrics-grid{grid-template-columns:1fr;}
  .metric-cell{border-left:0;padding:24px 0;}
  .metric-cell + .metric-cell{border-top:1px solid var(--line);}
  .path-grid{grid-template-columns:1fr;}
  .path-step{border-left:0;padding:26px 0;}
  .path-step + .path-step{border-top:1px solid var(--line);}
  .compare-card{padding:24px 20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .btn{padding:13px 20px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}