/* roulang page: index */
:root{
  --brand:#FF5A1F;
  --brand-press:#D63E00;
  --brand-soft:#FFF1EA;
  --cyan:#00C7B1;
  --cyan-soft:#E6FBF8;
  --yellow:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --text-2:#5A6270;
  --line:#E6E8EE;
  --bg:#F6F7FA;
  --card:#FFFFFF;
  --ok:#12A87B;
  --warn:#F2A33C;
  --err:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06);
  --sh-2:0 8px 24px rgba(20,22,28,.08);
  --gap:24px;
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-.01em}
h1{font-size:44px;line-height:1.15;font-weight:800}
h2{font-size:32px;line-height:1.25}
h3{font-size:21px;line-height:1.4;font-weight:600}
p{margin:0}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
img{display:block;max-width:100%;height:auto}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.section{padding:var(--sec) 0}
.section--tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head .eyebrow{display:block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:10px}
.section-head h2{max-width:720px}
.section-head p{color:var(--text-2);font-size:16px;margin-top:12px;max-width:640px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);white-space:nowrap;border-bottom:1px solid transparent;transition:.2s}
.link-more:hover{border-bottom-color:var(--brand)}
.link-more .arw{transition:transform .2s}
.link-more:hover .arw{transform:translateX(4px)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(180%) blur(8px);
  transition:box-shadow .25s;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(20,22,28,.07)}
.nav-wrap{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.02em;color:var(--ink);flex-shrink:0}
.brand-mark{
  width:26px;height:26px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand) 0%,#FF8A4C 55%,var(--yellow) 130%);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 3px 10px rgba(255,90,31,.32);
}
.brand-mark svg{width:15px;height:15px;fill:#fff}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:14px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);border-radius:2px;transition:width .22s}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--brand)}
.nav-links a.is-active::after{width:100%}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;width:220px;height:38px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:#fff;transition:.2s;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.search-box svg{width:15px;height:15px;fill:none;stroke:var(--text-2);stroke-width:1.9;flex-shrink:0}
.search-box input{border:0;outline:none;background:none;width:100%;font-size:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:var(--r-pill);transition:transform .18s,background .2s,color .2s,box-shadow .2s,border-color .2s;white-space:nowrap}
.btn-ghost{padding:8px 18px;font-size:15px;color:var(--text);border:1px solid var(--line);background:#fff}
.btn-ghost:hover{background:var(--brand-soft);border-color:#FFD2BE;color:var(--brand-press)}
.btn-primary{padding:10px 22px;font-size:15px;color:#fff;background:var(--brand);box-shadow:0 4px 14px rgba(255,90,31,.28)}
.btn-primary:hover{background:var(--brand-press);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(255,90,31,.24)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-outline-light{padding:14px 28px;font-size:16px;color:#fff;border:1px solid rgba(255,255,255,.42);background:rgba(255,255,255,.06)}
.btn-outline-light:hover{background:rgba(255,255,255,.16)}
.hamburger{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;background:#fff}
.hamburger span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px}
.hamburger span::before{top:-5px}
.hamburger span::after{top:5px}

.drawer{position:fixed;inset:0;z-index:120;pointer-events:none}
.drawer-panel{
  position:absolute;top:0;right:0;width:min(320px,86vw);height:100%;background:#fff;
  box-shadow:-12px 0 40px rgba(20,22,28,.16);padding:22px 20px 100px;
  transform:translateX(102%);transition:transform .28s ease;overflow-y:auto;
}
.drawer-mask{position:absolute;inset:0;background:rgba(20,22,28,.46);opacity:0;transition:opacity .28s}
.drawer.is-open{pointer-events:auto}
.drawer.is-open .drawer-mask{opacity:1}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-2);margin:20px 0 8px}
.drawer nav a{display:block;padding:12px 4px;font-size:16px;font-weight:500;border-bottom:1px solid var(--line)}
.drawer nav a.is-active{color:var(--brand)}
.drawer-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);font-size:18px;color:var(--text-2)}
.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;padding:10px 16px;background:rgba(255,255,255,.96);border-top:1px solid var(--line)}
.mobile-bar .btn-primary{width:100%;padding:13px 20px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#fff}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;transform:scale(1.02)}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,22,28,.92) 0%,rgba(20,22,28,.78) 46%,rgba(20,22,28,.55) 100%)}
.hero-inner{position:relative;display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:center;padding:104px 0 96px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);background:rgba(255,90,31,.16);border:1px solid rgba(255,90,31,.4);color:#FFB894;font-size:13px;font-weight:600}
.badge i{width:7px;height:7px;border-radius:50%;background:var(--brand);display:block;box-shadow:0 0 0 4px rgba(255,90,31,.22)}
.hero h1{color:#fff;margin:22px 0 18px;max-width:640px}
.hero h1 em{font-style:normal;color:#FF8A4C}
.hero-sub{font-size:18px;line-height:1.85;color:rgba(255,255,255,.78);max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 34px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:14px 32px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14)}
.hero-metric{display:flex;align-items:center;gap:10px}
.hero-metric .dot{width:34px;height:34px;border-radius:11px;background:rgba(0,199,177,.16);border:1px solid rgba(0,199,177,.36);display:inline-flex;align-items:center;justify-content:center}
.hero-metric .dot svg{width:16px;height:16px;stroke:var(--cyan);fill:none;stroke-width:1.9}
.hero-metric b{font-size:19px;font-weight:800;color:#fff}
.hero-metric span{font-size:13px;color:rgba(255,255,255,.62);display:block;line-height:1.4}
.hero-visual{position:relative}
.hero-shot{border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.16);box-shadow:0 24px 60px rgba(0,0,0,.42);background:#0d0f14}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-float{
  position:absolute;left:-18px;bottom:-26px;background:#fff;color:var(--text);border-radius:14px;
  padding:14px 18px;box-shadow:var(--sh-2);display:flex;align-items:center;gap:12px;max-width:250px;
}
.hero-float .ring{width:38px;height:38px;border-radius:50%;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.hero-float .ring svg{width:18px;height:18px;stroke:var(--brand);fill:none;stroke-width:2}
.hero-float b{display:block;font-size:15px}
.hero-float span{font-size:12.5px;color:var(--text-2);line-height:1.4;display:block}

/* ---------- entry strips ---------- */
.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.entry-row{
  display:flex;align-items:flex-start;gap:20px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.entry-row:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#FFD2BE}
.entry-idx{font-size:34px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.6px var(--brand);flex-shrink:0;padding-top:2px;font-variant-numeric:tabular-nums}
.entry-body h3{margin-bottom:6px}
.entry-body p{font-size:14.5px;color:var(--text-2);line-height:1.7}
.entry-row .arw{margin-left:auto;color:var(--brand);font-size:20px;transition:transform .2s;flex-shrink:0;padding-top:4px}
.entry-row:hover .arw{transform:translateX(4px)}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sh-1)}
.stat b{font-size:38px;font-weight:800;line-height:1.1;display:block;color:var(--brand);font-variant-numeric:tabular-nums}
.stat b.c{color:var(--cyan)}
.stat b.k{color:var(--ink)}
.stat span{font-size:14px;color:var(--text-2);display:block;margin-top:10px;line-height:1.65}
.stat .bar{height:4px;border-radius:4px;background:var(--brand-soft);margin-top:16px;overflow:hidden}
.stat .bar i{display:block;height:100%;border-radius:4px;background:var(--brand)}
.stat .bar.c{background:var(--cyan-soft)}
.stat .bar.c i{background:var(--cyan)}

/* ---------- case grid ---------- */
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.case-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .22s,box-shadow .22s;display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.case-card:nth-child(even){margin-top:36px}
.case-media{position:relative;overflow:hidden;background:#eceef3}
.case-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s}
.case-card:hover .case-media img{transform:scale(1.04)}
.tag{
  position:absolute;top:14px;left:14px;padding:5px 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;
  background:rgba(20,22,28,.78);color:#fff;backdrop-filter:blur(4px);
}
.tag--brand{background:var(--brand);color:#fff}
.tag--cyan{background:var(--cyan);color:#04241f}
.case-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:19px}
.case-body p{font-size:14.5px;color:var(--text-2);line-height:1.75}
.case-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:8px}
.case-foot .meta{font-size:13px;color:var(--text-2)}
.case-foot .go{font-size:14px;font-weight:600;color:var(--brand)}
.case-card:hover .go{text-decoration:underline}

/* ---------- compare table ---------- */
.compare-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
table.compare{width:100%;border-collapse:collapse;font-size:14.5px}
table.compare thead th{background:var(--ink);color:#fff;text-align:left;font-weight:600;padding:16px 20px;font-size:14px;letter-spacing:.02em}
table.compare tbody td{padding:16px 20px;border-bottom:1px solid var(--line);color:var(--text-2)}
table.compare tbody tr:nth-child(odd){background:#FBFBFD}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare td:first-child{color:var(--text);font-weight:600}
.pill{display:inline-block;padding:3px 11px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600}
.pill-a{background:var(--brand-soft);color:var(--brand-press)}
.pill-b{background:var(--cyan-soft);color:#00857a}
.pill-c{background:#FFF8DE;color:#8A6400}
.pill-d{background:#EEF1F6;color:var(--text-2)}

/* ---------- news / cms ---------- */
.news-grid{display:grid;grid-template-columns:7fr 3fr;gap:28px}
.lead-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .22s,box-shadow .22s;
}
.lead-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.lead-media{position:relative;background:#eceef3}
.lead-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.lead-body{padding:26px 28px 30px}
.lead-body h3{font-size:23px;margin:14px 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lead-body p{font-size:15px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lead-meta{display:flex;align-items:center;gap:14px;margin-top:18px;font-size:13px;color:var(--text-2)}
.news-side{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:8px 22px;box-shadow:var(--sh-1)}
.news-item{display:block;padding:16px 0;border-bottom:1px solid var(--line);transition:.2s}
.news-item:last-child{border-bottom:0}
.news-item:hover h4{color:var(--brand)}
.news-item .row{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--text-2);margin-bottom:6px}
.news-item h4{margin:0;font-size:15px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.mini-tag{padding:2px 9px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand-press);font-weight:600}
.empty-state{
  min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--card);border:1px dashed var(--line);border-radius:var(--r-card);text-align:center;padding:32px;
}
.empty-state svg{width:44px;height:44px;stroke:var(--text-2);fill:none;stroke-width:1.5}
.empty-state p{color:var(--text-2);font-size:15px}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:border-color .2s,box-shadow .2s}
.faq-item.is-open{border-color:#FFD2BE;box-shadow:var(--sh-2)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:18px 22px;font-size:17px;font-weight:600;text-align:left;color:var(--text);
}
.faq-item.is-open .faq-q{color:var(--brand-press)}
.faq-sign{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .25s,background .25s}
.faq-sign::before{top:9px;left:0;width:20px;height:2px}
.faq-sign::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-sign::after{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:320px}
.faq-a-inner{padding:0 22px 20px 38px;border-left:4px solid var(--brand);margin-left:22px;padding-left:18px;color:var(--text-2);font-size:15px;line-height:1.8}

/* ---------- contact cta ---------- */
.contact{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.contact::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:44px 44px;
}
.contact-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.contact h2{color:#fff;margin-bottom:16px}
.contact p.lead{color:rgba(255,255,255,.72);font-size:16.5px;max-width:460px}
.contact-list{margin-top:28px;display:flex;flex-direction:column;gap:14px}
.contact-list li{display:flex;align-items:center;gap:12px;font-size:15px;color:rgba(255,255,255,.8)}
.contact-list .ic{width:30px;height:30px;border-radius:9px;background:rgba(255,90,31,.2);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-list .ic svg{width:15px;height:15px;stroke:#FF8A4C;fill:none;stroke-width:2}
.form-card{background:#fff;color:var(--text);border-radius:var(--r-card);padding:30px;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .hint{font-size:13.5px;color:var(--text-2);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--text)}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-input);
  background:#fff;outline:none;transition:border-color .2s,box-shadow .2s;
}
.field textarea{height:88px;padding:12px 14px;resize:vertical;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.field .tip{font-size:12px;color:var(--text-2);margin-top:6px}
.form-card .btn-primary{width:100%;padding:13px 20px;margin-top:6px}
.form-note{font-size:12.5px;color:var(--text-2);margin-top:14px;text-align:center}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:64px 0 0;position:relative}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .brand{color:#fff;margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:280px;color:rgba(255,255,255,.6)}
.footer-col h4{font-size:14px;color:rgba(255,255,255,.5);font-weight:600;margin-bottom:16px;letter-spacing:.04em}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.68);padding:6px 0;transition:color .2s}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;padding:6px 0;color:rgba(255,255,255,.68)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  h1{font-size:40px}
  .container{max-width:100%}
}
@media (max-width:1023px){
  :root{--sec:72px}
  h1{font-size:34px}
  h2{font-size:27px}
  .nav-links{display:none}
  .search-box{width:170px}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:76px 0 80px}
  .hero-visual{max-width:620px}
  .hero-float{left:12px;bottom:-20px}
  .entry-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .case-grid{grid-template-columns:1fr 1fr;gap:20px}
  .case-card:nth-child(even){margin-top:24px}
  .news-grid{grid-template-columns:1fr}
  .contact-inner{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--sec:56px}
  body{font-size:15.5px}
  .container{padding:0 16px}
  h1{font-size:28px;line-height:1.25}
  h2{font-size:23px}
  h3{font-size:18px}
  .nav-wrap{height:56px}
  .brand{font-size:15.5px}
  .brand-mark{width:24px;height:24px}
  .nav-actions .search-box,.nav-actions .btn-ghost{display:none}
  .nav-actions .btn-primary{display:none}
  .hamburger{display:inline-flex}
  .hero-inner{padding:56px 0 64px}
  .hero-sub{font-size:16.5px}
  .hero-shot img{aspect-ratio:16/10}
  .hero-float{position:static;margin-top:16px;max-width:none}
  .hero-metrics{gap:16px 22px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .entry-row{padding:20px;gap:14px}
  .entry-idx{font-size:26px}
  .stats{grid-template-columns:1fr 1fr;gap:14px}
  .stat{padding:20px 18px}
  .stat b{font-size:30px}
  .case-grid{grid-template-columns:1fr}
  .case-card:nth-child(even){margin-top:0}
  .compare-wrap{overflow-x:auto}
  table.compare{min-width:620px}
  .faq-a-inner{margin-left:14px;padding-left:14px}
  .faq-q{font-size:16px;padding:16px 18px}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding-bottom:32px}
  .mobile-bar{display:block}
  .site-footer{padding-bottom:64px}
}
@media (max-width:479px){
  h1{font-size:25px}
  .hero-cta{gap:10px}
  .btn-lg{padding:12px 22px;font-size:15px}
  .stats{grid-template-columns:1fr}
  .stat b{font-size:28px}
}

/* roulang page: article */
:root{
  --brand:#FF5A1F;
  --brand-press:#D63E00;
  --brand-soft:#FFF1EA;
  --cyan:#00C7B1;
  --yellow:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --muted:#5A6270;
  --line:#E6E8EE;
  --bg:#F6F7FA;
  --card:#FFFFFF;
  --ok:#12A87B;
  --warn:#F2A33C;
  --err:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06);
  --sh-2:0 8px 24px rgba(20,22,28,.08);
  --header-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
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,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--brand-press)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{max-width:1240px}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{
  height:var(--header-h);
  display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);white-space:nowrap}
.brand-mark{
  width:26px;height:26px;flex:0 0 26px;border-radius:8px;
  background:linear-gradient(135deg,var(--brand),#FF8A5B);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:16px;height:16px;fill:#fff}
.brand-text{font-size:17px;letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;border-radius:2px;
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand);font-weight:600}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:220px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.search-box svg{width:16px;height:16px;fill:var(--muted);flex:0 0 16px}
.search-box input{border:none;outline:none;width:100%;font-size:14px;background:transparent}
.search-box input::placeholder{color:#9AA2AE}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 1px 2px rgba(255,90,31,.35)}
.btn-primary:hover{background:var(--brand-press);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-press);border-color:#FFD4C0}
.btn-outline{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn-outline:hover{background:var(--brand-soft)}
.btn-lg{height:48px;padding:0 26px;font-size:15px}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:12px;
  align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);z-index:90;
  background:#fff;box-shadow:-8px 0 32px rgba(20,22,28,.16);
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;font-size:18px;line-height:1;color:var(--muted)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:18px}
.drawer-nav a{padding:12px 12px;border-radius:12px;font-size:15px;font-weight:500;color:var(--muted)}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--brand-soft);color:var(--brand-press)}
.drawer-foot{margin-top:auto;display:grid;gap:10px}
.backdrop{
  position:fixed;inset:0;background:rgba(20,22,28,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.backdrop.is-open{opacity:1;visibility:visible}

/* ---------- article layout ---------- */
.page-main{padding:28px 0 88px}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);transition:color .18s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C3C8D2}
.breadcrumb .current{color:var(--ink);font-weight:600}

.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:44px;align-items:start;
}
.article-head{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-1);margin-bottom:24px;
}
.article-head h1{
  font-size:32px;line-height:1.28;font-weight:800;color:var(--ink);letter-spacing:-.2px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  margin-top:20px;padding-top:18px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-press);
}
.badge-cyan{background:rgba(0,199,177,.12);color:#008D7E}
.badge-yellow{background:rgba(255,212,59,.24);color:#9A7500}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#C3C8D2}

.article-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px;box-shadow:var(--sh-1);
}
.article-body{max-width:820px;font-size:17px;line-height:1.9;color:#2A2F38}
.article-body > * + *{margin-top:1.1em}
.article-body h2{
  font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);
  margin-top:2em;padding-left:16px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:21px;font-weight:600;color:var(--ink);margin-top:1.8em}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin-top:1.5em}
.article-body p{margin-top:1em}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{color:var(--brand-press);border-bottom:1px solid rgba(255,90,31,.35)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body ul,.article-body ol{margin-top:1em;padding-left:4px}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;line-height:1.8;margin-top:.6em}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:50%;
  background:var(--brand-soft);border:2px solid var(--brand);
}
.article-body ol{counter-reset:sn}
.article-body ol li::before{
  counter-increment:sn;content:counter(sn);
  position:absolute;left:0;top:.4em;font-size:13px;font-weight:700;color:var(--brand);
}
.article-body blockquote{
  background:var(--bg);border-left:4px solid var(--brand);
  padding:16px 20px;border-radius:0 var(--r-img) var(--r-img) 0;color:var(--muted);
}
.article-body img{border-radius:var(--r-img);margin-top:1.4em;box-shadow:var(--sh-1)}
.article-body figure figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin-top:1.4em;display:block;overflow-x:auto}
.article-body th{
  background:var(--ink);color:#fff;font-weight:600;text-align:left;padding:12px 14px;white-space:nowrap;
}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body tbody tr:nth-child(odd){background:var(--bg)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0}

.empty-state{
  text-align:center;padding:64px 24px;
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:48px;height:48px;fill:#C3C8D2}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink)}
.empty-state p{color:var(--muted);font-size:15px}

/* ---------- side toc ---------- */
.toc-box{display:none}
.toc-inner{
  position:sticky;top:calc(var(--header-h) + 24px);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.toc-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:12px}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:52vh;overflow:auto}
.toc-link{
  display:block;font-size:13px;color:var(--muted);line-height:1.5;
  padding:7px 10px;border-radius:8px;border-left:2px solid transparent;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.toc-link.toc-sub{padding-left:22px;font-size:12.5px}
.toc-link:hover{color:var(--brand);background:var(--bg)}
.toc-link.is-current{color:var(--brand-press);background:var(--brand-soft);border-left-color:var(--brand);font-weight:600}
.toc-side-card{
  margin-top:16px;background:var(--brand-soft);border-radius:var(--r-img);
  padding:16px;font-size:13px;color:#8A4A2C;line-height:1.7;
}
.toc-side-card strong{display:block;color:var(--brand-press);font-size:14px;margin-bottom:6px}

/* ---------- mobile toc ---------- */
.toc-mobile{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:20px;overflow:hidden;box-shadow:var(--sh-1);
}
.toc-mobile summary{
  list-style:none;padding:14px 18px;font-size:14px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:"+";color:var(--brand);font-size:18px;font-weight:700}
.toc-mobile[open] summary::after{content:"−"}
.toc-mobile .toc-list{padding:0 12px 14px}

/* ---------- footer of article ---------- */
.article-foot{margin-top:28px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag-row .tag-label{font-size:13px;color:var(--muted)}
.tag{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:var(--r-pill);
  background:var(--bg);border:1px solid var(--line);font-size:13px;color:var(--muted);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.tag:hover{color:var(--brand-press);border-color:#FFD4C0;background:var(--brand-soft)}

.nav-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.nav-card{
  display:flex;flex-direction:column;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.nav-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#FFD4C0}
.nav-card span{font-size:12px;color:var(--muted)}
.nav-card strong{font-size:15px;font-weight:600;color:var(--ink);line-height:1.55}
.nav-card em{font-style:normal;font-size:13px;color:var(--brand);font-weight:600}
.back-row{margin-top:24px}

/* ---------- related ---------- */
.section{padding:72px 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;
}
.section-head h2{font-size:28px;font-weight:700;color:var(--ink);letter-spacing:-.2px}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px}
.link-more{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.link-more:hover{color:var(--brand-press)}

.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;
  display:flex;flex-direction:column;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.related-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EDEFF4}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-thumb .badge{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92)}
.related-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-body h3{font-size:17px;font-weight:600;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-body p{font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted)}
.arrow{color:var(--brand);font-weight:700;transition:transform .2s ease}
.related-card:hover .arrow{transform:translateX(4px)}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#FFD4C0;box-shadow:var(--sh-2)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-press);font-size:16px;font-weight:700;
  transition:transform .25s ease,background-color .25s ease,color .25s ease;
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg);background:var(--brand);color:#fff}
.faq-answer{
  padding:0 24px 22px;border-left:4px solid var(--brand);
  margin-left:24px;font-size:15px;color:var(--muted);line-height:1.85;
  animation:fadeIn .28s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}

/* ---------- cta ---------- */
.cta-band{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  border-radius:24px;padding:56px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;opacity:.7;
}
.cta-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.cta-inner h2{font-size:30px;font-weight:800;line-height:1.3;color:#fff}
.cta-inner p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.72);line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-card{
  background:#fff;border-radius:var(--r-card);padding:24px;color:var(--text);
  box-shadow:0 16px 40px rgba(0,0,0,.28);
}
.cta-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px}
.cta-card p{font-size:13px;color:var(--muted);margin-bottom:16px}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.field input,.field select{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);
  border-radius:var(--r-input);background:#fff;font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.cta-card .btn{width:100%;margin-top:6px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:24px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.5);margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.68);padding:6px 0;transition:color .18s ease}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.6);padding:6px 0;line-height:1.7}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- mobile cta bar ---------- */
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(20,22,28,.96);padding:10px 16px;gap:10px;
  box-shadow:0 -6px 20px rgba(20,22,28,.24);
}
.mobile-cta .btn{flex:1;height:44px}
.mobile-cta .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.3)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .toc-box{display:none !important}
}
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 288px}
  .toc-box{display:block}
  .toc-mobile{display:none}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .search-box{width:180px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:40px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .search-box{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-ghost{display:none}
  .header-actions .btn-primary{display:none}
  :root{--header-h:56px}
  .article-head{padding:24px 20px}
  .article-head h1{font-size:26px}
  .article-card{padding:22px 18px}
  .article-body{font-size:16px}
  .article-body h2{font-size:22px}
  .nav-cards{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .nav-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-head h2{font-size:22px}
  .cta-band{padding:30px 20px;border-radius:18px}
  .cta-inner h2{font-size:23px}
  .faq-item summary{padding:16px;font-size:15.5px}
  .faq-answer{margin-left:16px;padding:0 16px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .mobile-cta{display:flex}
  .page-main{padding-bottom:96px}
}
@media (max-width:480px){
  .article-head h1{font-size:23px}
  .meta-row{font-size:12.5px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
}

/* roulang page: category1 */
/* ===================== 设计变量 ===================== */
:root{
  --primary:#FF5A1F;
  --primary-press:#D63E00;
  --primary-soft:#FFF1EA;
  --accent:#00C7B1;
  --accent-soft:#E6FBF8;
  --highlight:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --muted:#5A6270;
  --line:#E6E8EE;
  --bg:#F6F7FA;
  --card:#FFFFFF;
  --success:#12A87B;
  --warning:#F2A33C;
  --danger:#E5484D;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,22,28,.06);
  --shadow-2:0 8px 24px rgba(20,22,28,.08);
  --shadow-3:0 16px 40px rgba(20,22,28,.12);
  --sp:8px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

/* ===================== reset / base ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:var(--primary);color:#fff}

/* ===================== 容器与板块 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--gray{background:var(--bg)}
.section--white{background:#fff}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--primary);background:var(--primary-soft);
  padding:6px 14px;border-radius:var(--radius-pill);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary)}
h1{font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.16;letter-spacing:-.01em}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.28;letter-spacing:-.01em}
h3{font-size:20px;font-weight:600;line-height:1.4}
.section-head p{margin-top:16px;font-size:16px;color:var(--muted);line-height:1.8}
.lead{font-size:17px;color:var(--muted);line-height:1.85}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:var(--radius-pill);
  border:1px solid transparent;background:transparent;
  transition:background .2s ease,color .2s ease,transform .18s ease,box-shadow .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(255,90,31,.26)}
.btn-primary:hover{background:var(--primary-press);transform:translateY(-1px);box-shadow:0 14px 30px rgba(255,90,31,.32)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{border-color:var(--line);color:var(--text);background:#fff}
.btn-ghost:hover{border-color:#FFD0BC;background:var(--primary-soft);color:var(--primary-press)}
.btn-light{border-color:rgba(255,255,255,.42);color:#fff;background:rgba(255,255,255,.06)}
.btn-light:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.7)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);border-bottom:1px solid rgba(255,90,31,.32);padding-bottom:2px;transition:.2s}
.link-more:hover{color:var(--primary-press);border-color:var(--primary-press)}

/* ===================== 徽章 / 标签 ===================== */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:var(--radius-pill);background:var(--primary-soft);color:var(--primary-press)}
.badge--accent{background:var(--accent-soft);color:#00857A}
.badge--ink{background:#EEF0F4;color:#414855}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ===================== 品牌标识 ===================== */
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:26px;height:26px;flex:none;border-radius:8px;
  background:linear-gradient(135deg,#FF5A1F,#FF8A4C);
  display:grid;place-items:center;
  box-shadow:0 4px 10px rgba(255,90,31,.28);
}
.brand-mark svg{width:18px;height:18px;fill:#fff}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--text)}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(20,22,28,.08)}
.header-inner{display:flex;align-items:center;gap:32px;height:64px}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:#3A404A;padding:6px 0;transition:color .2s ease}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--primary);font-weight:600}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;width:216px;height:38px;
  padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);
  background:#F6F7FA;transition:border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.search-box svg{width:16px;height:16px;fill:#98A0AE;flex:none}
.search-box input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;line-height:1}
.search-box input::placeholder{color:#98A0AE}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:#fff;
  transition:.2s;
}
.menu-toggle:hover{border-color:#FFD0BC;background:var(--primary-soft)}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--text);border-radius:2px;position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--text);border-radius:2px;transition:.2s}
.menu-toggle span::before{top:-5px}
.menu-toggle span::after{top:5px}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(20,22,28,.52);opacity:0;visibility:hidden;transition:.25s ease;z-index:90}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(84vw,340px);z-index:100;
  background:#fff;padding:22px 20px 32px;overflow-y:auto;
  transform:translateX(102%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  box-shadow:-16px 0 44px rgba(20,22,28,.2);
}
.mobile-drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:18px;line-height:1;color:var(--muted)}
.drawer-close:hover{border-color:#FFD0BC;color:var(--primary)}
.mobile-drawer .search-box{width:100%;margin-bottom:18px}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:22px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 12px;border-radius:12px;font-size:15px;font-weight:500;color:#3A404A;
  transition:.2s;
}
.drawer-nav a:hover{background:var(--primary-soft);color:var(--primary-press)}
.drawer-nav a.is-active{background:var(--primary-soft);color:var(--primary-press);font-weight:600}
.drawer-nav a span{color:#B6BCC7;font-size:13px}

/* 移动底栏 */
.mobile-cta-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;gap:10px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);border-top:1px solid var(--line);backdrop-filter:blur(10px);
}
.mobile-cta-bar .btn{flex:1;padding:13px 16px;font-size:14px}

/* ===================== 首屏 ===================== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:#14161C url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(104deg,rgba(20,22,28,.9) 0%,rgba(20,22,28,.72) 48%,rgba(20,22,28,.5) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-inner{padding:56px 0 76px;max-width:760px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:26px}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .2s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:rgba(255,255,255,.34)}
.breadcrumb .current{color:#fff;font-weight:600}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary-press);
  background:#FFF1EA;padding:7px 15px;border-radius:var(--radius-pill);margin-bottom:22px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:block}
.hero h1{color:#fff;margin-bottom:20px}
.hero p.hero-sub{font-size:17px;line-height:1.85;color:rgba(255,255,255,.76);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:36px;margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14)}
.metric{display:flex;align-items:center;gap:12px}
.metric .m-icon{
  width:36px;height:36px;flex:none;border-radius:10px;
  background:rgba(255,90,31,.16);border:1px solid rgba(255,90,31,.4);
  display:grid;place-items:center;
}
.metric .m-icon svg{width:18px;height:18px;fill:var(--primary)}
.metric b{display:block;font-size:19px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}
.metric span{display:block;font-size:13px;color:rgba(255,255,255,.58)}

/* ===================== 通道速览（2 列编号条） ===================== */
.channel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.channel-item{
  position:relative;display:flex;gap:20px;align-items:flex-start;
  padding:26px 26px 26px 24px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.channel-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#FFD3C0}
.channel-num{
  flex:none;font-size:34px;font-weight:800;line-height:1;
  color:var(--primary);font-variant-numeric:tabular-nums;
  min-width:52px;
}
@supports (-webkit-text-stroke:1px red){
  .channel-num{color:transparent;-webkit-text-stroke:1.5px var(--primary)}
}
.channel-body h3{margin-bottom:8px}
.channel-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
.channel-link{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:600;color:var(--primary);transition:gap .2s ease,color .2s ease}
.channel-item:hover .channel-link{gap:10px;color:var(--primary-press)}

/* ===================== 对照表 ===================== */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:660px}
thead th{
  background:var(--ink);color:#fff;font-size:14px;font-weight:600;text-align:left;
  padding:16px 22px;letter-spacing:.02em;
}
tbody td{padding:16px 22px;font-size:14.8px;color:var(--muted);border-top:1px solid var(--line);vertical-align:top}
tbody tr:nth-child(odd){background:#F6F7FA}
tbody td:first-child{color:var(--text);font-weight:600}
.table-note{padding:16px 22px;font-size:13px;color:#8A929E;border-top:1px solid var(--line);background:#fff}

/* ===================== 常见场景卡（3 列） ===================== */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease;
  display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.scene-media{position:relative;background:#EDEFF4}
.scene-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-media .badge{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.94);color:var(--primary-press);box-shadow:0 2px 8px rgba(20,22,28,.12)}
.scene-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.scene-body h3{font-size:18px;margin-bottom:10px}
.scene-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
.scene-foot{margin-top:auto;padding-top:16px;font-size:13.5px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .2s ease}
.scene-card:hover .scene-foot{gap:10px}

/* ===================== 数据条 ===================== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-1);
}
.stat b{
  display:block;font-size:38px;font-weight:800;line-height:1.1;
  font-variant-numeric:tabular-nums;color:var(--primary);letter-spacing:-.02em;
}
.stat.is-accent b{color:var(--accent)}
.stat span{display:block;margin-top:10px;font-size:14px;color:var(--muted);line-height:1.7}

/* ===================== 流程步骤 ===================== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:28px 22px 24px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:14px;font-weight:800;letter-spacing:.08em;
  color:var(--primary);margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted);line-height:1.75}
.step::after{
  content:"";position:absolute;left:28px;bottom:0;width:36px;height:3px;border-radius:3px 3px 0 0;
  background:var(--primary);opacity:0;transition:opacity .22s ease;
}
.step:hover::after{opacity:1}

/* ===================== FAQ ===================== */
.faq{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-1);
  transition:box-shadow .22s ease;
}
.faq-item:hover{box-shadow:var(--shadow-2)}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:20px 60px 20px 24px;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.5;
  transition:color .2s ease,box-shadow .25s ease,background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--primary);transition:transform .25s ease,color .25s ease;
  line-height:1;
}
.faq-item summary:hover{background:#FCFCFD;color:var(--primary-press)}
.faq-item[open] summary{box-shadow:inset 4px 0 0 var(--primary);background:#FFFCFA;padding-left:28px}
.faq-item[open] summary::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq-body{padding:0 24px 22px 28px;font-size:15.5px;color:var(--muted);line-height:1.85;animation:fadeIn .28s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ===================== 深色 CTA + 表单 ===================== */
.cta-band{position:relative;background:var(--ink);color:#fff;padding:92px 0;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:34px 34px;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.cta-copy h2{color:#fff;margin-bottom:18px}
.cta-copy p{color:rgba(255,255,255,.68);font-size:16px;line-height:1.85;max-width:520px}
.cta-list{margin-top:28px;display:flex;flex-direction:column;gap:14px}
.cta-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.8);line-height:1.7}
.cta-list li::before{
  content:"";flex:none;width:8px;height:8px;margin-top:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(0,199,177,.16);
}
.form-card{
  background:#fff;border-radius:var(--radius-card);padding:28px 26px 30px;
  box-shadow:var(--shadow-3);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-tip{font-size:13.5px;color:var(--muted);margin-bottom:22px;line-height:1.7}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:#41485A;margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-input);
  background:#fff;padding:0 14px;height:44px;font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;outline:none;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#8A929E 50%),linear-gradient(135deg,#8A929E 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 15px) 20px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,90,31,.14)}
.field input::placeholder,.field textarea::placeholder{color:#A8AEBA}
.field-error{font-size:12px;color:var(--danger);margin-top:6px;display:none}
.field.has-error input,.field.has-error select{border-color:var(--danger)}
.field.has-error .field-error{display:block}
.form-note{margin-top:14px;font-size:12.5px;color:#8A929E;line-height:1.7;text-align:center}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:68px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand{margin-bottom:4px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.58);margin-top:14px;max-width:330px}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.5);letter-spacing:.05em;margin-bottom:18px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.68);margin-bottom:11px;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.68);margin-bottom:11px;line-height:1.7}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.46);
}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  .container{max-width:1140px}
}
@media (max-width:1023px){
  .nav-links,.header-actions .search-box,.header-actions .btn-ghost{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{gap:16px;height:60px}
  .header-actions{margin-left:auto;gap:10px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .hero-inner{padding:44px 0 62px}
  .channel-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .cta-band{padding:72px 0}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .brand-text{font-size:15px}
  .brand-mark{width:24px;height:24px}
  .brand-mark svg{width:16px;height:16px}
  .hero-inner{padding:34px 0 54px}
  .hero p.hero-sub{font-size:15.5px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1;min-width:140px}
  .hero-metrics{gap:20px;margin-top:34px;padding-top:22px}
  .metric{flex:1 1 44%}
  .metric b{font-size:17px}
  .channel-item{padding:20px;gap:16px;flex-direction:column}
  .channel-num{font-size:28px;min-width:auto}
  .scene-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:14px}
  .stat{padding:20px 18px}
  .stat b{font-size:30px}
  .steps{grid-template-columns:1fr}
  .faq-item summary{font-size:15.5px;padding:17px 52px 17px 20px}
  .faq-item[open] summary{padding-left:24px}
  .faq-body{padding:0 20px 20px 24px;font-size:15px}
  .cta-band{padding:56px 0}
  .form-card{padding:22px 18px 24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;gap:6px}
  .mobile-cta-bar{display:flex}
  body{padding-bottom:78px}
  .section-head{margin-bottom:32px}
}
@media (max-width:520px){
  .brand-text{font-size:15px}
  h1{font-size:27px}
  h2{font-size:22px}
  .section{padding:48px 0}
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .hero-actions .btn{flex:1 1 100%}
}

/* roulang page: category2 */
:root{
  --brand:#FF5A1F;
  --brand-press:#D63E00;
  --brand-soft:#FFF1EA;
  --brand-soft-2:#FFE0D0;
  --cyan:#00C7B1;
  --cyan-soft:#E6FAF7;
  --yellow:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --muted:#5A6270;
  --line:#E6E8EE;
  --bg:#F6F7FA;
  --card:#FFFFFF;
  --ok:#12A87B;
  --warn:#F2A33C;
  --err:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06);
  --sh-2:0 8px 24px rgba(20,22,28,.08);
  --container:1200px;
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:48px;
  --sp-6:72px;
  --sp-7:96px;
  --font: "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;}
a.inline-link{color:var(--brand);border-bottom:1px solid rgba(255,90,31,.35);transition:border-color .2s ease,color .2s ease;}
a.inline-link:hover{border-bottom-color:var(--brand);color:var(--brand-press);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input,select{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:64px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;font-weight:800;letter-spacing:.2px;
  color:var(--ink);white-space:nowrap;
}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:9px;
  background:linear-gradient(140deg,var(--brand),#FF8A4C);
  box-shadow:0 4px 10px rgba(255,90,31,.32);
  flex:none;
}
.brand-mark svg{width:16px;height:16px;fill:#fff;}
.nav-links{
  display:flex;align-items:center;gap:28px;
  margin-left:8px;
}
.nav-links a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;border-radius:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:38px;width:224px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search svg{width:16px;height:16px;fill:none;stroke:var(--muted);stroke-width:2;flex:none;}
.nav-search input{
  border:0;outline:0;background:transparent;width:100%;
  font-size:14px;color:var(--text);
}
.nav-search input::placeholder{color:#9AA1AE;}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,90,31,.12);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .16s ease,box-shadow .2s ease;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(255,90,31,.28);}
.btn-primary:hover{background:var(--brand-press);transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,90,31,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 10px rgba(255,90,31,.28);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-press);border-color:var(--brand-soft-2);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--brand-soft);color:var(--brand-press);transform:translateY(-1px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6);}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);
  border-radius:12px;background:#fff;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .25s ease,opacity .2s ease;
}
.nav-toggle span:nth-child(1){top:14px;}
.nav-toggle span:nth-child(2){top:20px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;
  padding:18px 24px 24px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .drawer-search{
  display:flex;align-items:center;gap:8px;height:42px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);margin-bottom:16px;
}
.mobile-drawer .drawer-search input{border:0;outline:0;width:100%;background:transparent;font-size:14px;}
.mobile-drawer a.drawer-link{
  display:block;padding:12px 4px;font-size:15px;font-weight:500;
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.drawer-link.is-active{color:var(--brand);}
.mobile-drawer .drawer-cta{margin-top:18px;display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding:24px 0 0;
}
.breadcrumb a{color:var(--muted);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#B6BCC7;}
.breadcrumb .current{color:var(--text);font-weight:600;}

/* ---------- 页面头部 ---------- */
.page-head{padding:16px 0 40px;}
.head-row{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:28px;flex-wrap:wrap;
}
.head-row h1{
  font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.4px;
  color:var(--ink);max-width:640px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-press);
  font-size:13px;font-weight:600;margin-bottom:16px;
}
.eyebrow::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--brand);
}
.lede{
  margin-top:18px;max-width:720px;
  font-size:17px;color:var(--muted);
}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  height:38px;padding:0 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:14px;font-weight:500;
  transition:all .2s ease;
}
.chip:hover{border-color:var(--brand-soft-2);color:var(--brand-press);background:var(--brand-soft);}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(255,90,31,.24);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-6) 0;}
.section-tight{padding:var(--sp-5) 0;}
.section-head{margin-bottom:34px;max-width:760px;}
.section-title{font-size:32px;line-height:1.25;font-weight:700;color:var(--ink);letter-spacing:-.3px;}
.section-sub{margin-top:12px;font-size:16px;color:var(--muted);}
.section-head-row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-bottom:34px;
}

/* ---------- 横向图文列表 ---------- */
.list-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 32px;
}
.row-card{
  display:grid;grid-template-columns:180px 1fr;gap:20px;
  padding:24px 0;border-top:1px solid var(--line);
  align-items:start;
}
.row-card:first-child,.row-card:nth-child(2){border-top:1px solid var(--line);}
.row-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/3;background:#EDEFF4;
}
.row-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.row-card:hover .row-media img{transform:scale(1.04);}
.row-body h3{
  font-size:20px;font-weight:600;color:var(--ink);line-height:1.4;
  margin-bottom:8px;
}
.row-body p{font-size:15px;color:var(--muted);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:6px;
  background:var(--cyan-soft);color:#0A7F72;
  font-size:12px;font-weight:600;margin-bottom:10px;
}
.tag.tag-brand{background:var(--brand-soft);color:var(--brand-press);}
.points{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.point{
  font-size:12px;color:var(--muted);
  padding:3px 10px;border:1px solid var(--line);border-radius:var(--r-pill);background:#fff;
}
.row-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);
  transition:gap .2s ease,color .2s ease;
}
.row-link span.arrow{transition:transform .2s ease;display:inline-block;}
.row-card:hover .row-link span.arrow{transform:translateX(4px);}
.row-card:hover .row-link{color:var(--brand-press);}

/* ---------- 数据卡 ---------- */
.stats-wrap{background:#fff;border-radius:24px;border:1px solid var(--line);padding:32px;box-shadow:var(--sh-1);}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.stat-card{padding:20px;border-left:3px solid var(--brand-soft-2);}
.stat-card:first-child{border-left-color:var(--brand);}
.stat-num{
  font-size:38px;font-weight:800;line-height:1.1;color:var(--ink);
  letter-spacing:-.5px;font-variant-numeric:tabular-nums;
}
.stat-num em{font-style:normal;font-size:16px;font-weight:600;color:var(--brand);margin-left:4px;}
.stat-num.cyan{color:var(--cyan);}
.stat-label{margin-top:8px;font-size:14px;color:var(--muted);}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.scene-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft-2);}
.scene-icon{
  width:40px;height:40px;border-radius:12px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.scene-icon svg{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8;}
.scene-card h3{font-size:19px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.scene-card p{font-size:15px;color:var(--muted);}
.scene-card .scene-note{
  display:block;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);
  font-size:13px;color:#0A7F72;font-weight:600;
}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
  counter-reset:step;
}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 22px;box-shadow:var(--sh-1);
}
.step-num{
  font-size:40px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--brand);
  margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-list{display:grid;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;position:relative;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;
  border-radius:0 4px 4px 0;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .25s ease;
}
.faq-item.is-open::before{transform:scaleY(1);}
.faq-item:hover{border-color:var(--brand-soft-2);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);position:relative;
  transition:background-color .25s ease,border-color .25s ease,transform .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--muted);border-radius:2px;
  transition:background-color .25s ease,transform .25s ease;
}
.faq-icon::before{left:7px;right:7px;top:12px;height:2px;}
.faq-icon::after{top:7px;bottom:7px;left:12px;width:2px;}
.faq-item.is-open .faq-icon{background:var(--brand-soft);border-color:var(--brand-soft-2);transform:rotate(180deg);}
.faq-item.is-open .faq-icon::before{background:var(--brand);}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);background:var(--brand);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s ease,opacity .28s ease,padding .28s ease;
  opacity:0;padding:0 24px;
}
.faq-item.is-open .faq-a{max-height:320px;opacity:1;padding:0 24px 22px;}
.faq-a p{font-size:15px;color:var(--muted);}

/* ---------- 分页 ---------- */
.pagination{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-top:40px;
}
.page-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:40px;height:40px;padding:0 14px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:14px;font-weight:600;
}
.page-num.current{background:var(--brand);border-color:var(--brand);color:#fff;}
.page-num.disabled{opacity:.4;cursor:not-allowed;}

/* ---------- 深色 CTA ---------- */
.cta-band{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  border-radius:24px;padding:56px;margin:0 0 var(--sp-6);
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border-radius:50%;background:radial-gradient(circle,rgba(255,90,31,.35),transparent 65%);
  pointer-events:none;
}
.cta-inner{position:relative;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;}
.cta-band h2{font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-.3px;}
.cta-band p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.72);max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{
  font-size:14px;font-weight:600;color:rgba(255,255,255,.5);
  margin-bottom:16px;letter-spacing:.4px;
}
.footer-col a,.footer-col p{
  display:block;font-size:14px;color:rgba(255,255,255,.68);
  margin-bottom:10px;transition:color .2s ease;
}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1120px;}
  .head-row h1{font-size:40px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-search{width:180px;}
  .nav-toggle{display:inline-block;}
  .head-row h1{font-size:36px;}
  .list-grid{grid-template-columns:1fr;gap:0;}
  .row-card:nth-child(2){border-top:1px solid var(--line);}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header-inner{height:56px;gap:12px;}
  .brand{font-size:15px;}
  .brand-mark{width:24px;height:24px;}
  .nav-search{display:none;}
  .btn-ghost{display:none;}
  .breadcrumb{padding-top:18px;}
  .page-head{padding:12px 0 32px;}
  .head-row h1{font-size:29px;line-height:1.22;}
  .lede{font-size:16px;}
  .section,.section-tight{padding:56px 0;}
  .section-title{font-size:26px;}
  .row-card{grid-template-columns:1fr;gap:14px;padding:22px 0;}
  .stats-wrap{padding:22px;}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
  .stat-num{font-size:30px;}
  .scene-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .cta-band{padding:32px 22px;border-radius:20px;margin-bottom:48px;}
  .cta-band h2{font-size:25px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:16px;padding:18px;}
  .faq-item.is-open .faq-a{padding:0 18px 18px;}
}
@media (max-width:519px){
  .head-row h1{font-size:26px;}
  .chip{height:34px;padding:0 14px;font-size:13px;}
  .points{gap:6px;}
  .page-num{min-width:36px;height:36px;}
}

/* roulang page: category3 */
:root{
  --brand:#FF5A1F;
  --brand-press:#D63E00;
  --brand-soft:#FFF1EA;
  --cyan:#00C7B1;
  --yellow:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --muted:#5A6270;
  --line:#E6E8EE;
  --page:#F6F7FA;
  --card:#FFFFFF;
  --ok:#12A87B;
  --warn:#F2A33C;
  --err:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06);
  --sh-2:0 8px 24px rgba(20,22,28,.08);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--page);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:17px;letter-spacing:.2px;color:var(--ink);white-space:nowrap}
.brand-mark{
  width:26px;height:26px;flex:0 0 26px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;background:var(--brand);color:#fff;
}
.brand-mark svg{width:17px;height:17px;fill:currentColor}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:6px 0;transition:color .18s ease}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand);font-weight:600}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:220px;height:38px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:#F8F9FC;padding:0 40px 0 16px;font-size:14px;transition:border-color .18s,background .18s;
}
.nav-search input::placeholder{color:#9AA1AC}
.nav-search input:focus{background:#fff;border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.nav-search .search-icon{position:absolute;right:14px;width:16px;height:16px;fill:#9AA1AC;pointer-events:none}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-pill);font-weight:600;cursor:pointer;
  transition:transform .16s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-ghost-sm{
  height:38px;padding:0 18px;font-size:14px;color:var(--brand);border-color:rgba(255,90,31,.4);background:#fff;
}
.btn-ghost-sm:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-primary-sm{height:38px;padding:0 20px;font-size:14px;background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary-sm:hover{background:var(--brand-press);transform:translateY(-1px)}
.btn-primary-sm:active{transform:translateY(1px)}
.btn-primary{height:50px;padding:0 30px;font-size:16px;background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-press);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{height:50px;padding:0 28px;font-size:16px;background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;width:300px;max-width:86vw;height:100%;background:#fff;z-index:90;
  transform:translateX(102%);transition:transform .28s ease;padding:20px 20px 96px;overflow-y:auto;
  box-shadow:-12px 0 32px rgba(20,22,28,.12);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--muted)}
.drawer-search input{width:100%;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);background:#F8F9FC;padding:0 16px;font-size:14px}
.drawer-links{display:flex;flex-direction:column;margin-top:16px}
.drawer-links a{padding:13px 4px;border-bottom:1px solid var(--line);font-size:15px;font-weight:500;color:var(--text)}
.drawer-links a.is-active{color:var(--brand);font-weight:600}
.drawer-cta{
  position:fixed;left:0;right:0;bottom:0;padding:14px 20px;background:#fff;border-top:1px solid var(--line);
}
.drawer-cta .btn{width:100%;height:46px;background:var(--brand);color:#fff;font-size:15px;border-radius:var(--r-pill)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,22,28,.45);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 分类页头 ============ */
.page-head{padding:28px 0 56px;background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C3C8D2}
.breadcrumb .current{color:var(--text);font-weight:500}
.page-head-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:40px;align-items:end}
.page-head h1{
  font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.5px;color:var(--ink);margin-bottom:16px;
}
.page-head h1 em{font-style:normal;color:var(--brand)}
.page-head .lead{font-size:17px;color:var(--muted);max-width:640px}
.page-head-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;min-height:210px;box-shadow:var(--sh-2);
}
.page-head-visual img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.page-head-visual .visual-tag{
  position:absolute;left:16px;top:16px;z-index:2;background:rgba(20,22,28,.72);color:#fff;
  font-size:13px;padding:6px 12px;border-radius:var(--r-pill);backdrop-filter:blur(2px);
}
.page-head-visual .visual-caption{
  position:absolute;left:0;right:0;bottom:0;padding:36px 18px 16px;color:#fff;font-size:14px;
  background:linear-gradient(180deg,rgba(20,22,28,0) 0%,rgba(20,22,28,.82) 100%);
}

/* 指标条 */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;margin-top:40px;
}
.metric-strip .metric{background:#fff;padding:20px 22px}
.metric .num{font-size:30px;font-weight:800;line-height:1.1;color:var(--brand);margin-bottom:6px}
.metric .num.cyan{color:var(--cyan)}
.metric .lbl{font-size:13.5px;color:var(--muted)}

/* ============ 主体 3:9 布局 ============ */
.section{padding:88px 0}
.section.soft{background:var(--page)}
.section.white{background:#fff}
.section.dark{background:var(--ink);color:#fff}
.layout-side{display:grid;grid-template-columns:minmax(248px,3fr) minmax(0,9fr);gap:32px;align-items:start}
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:16px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:12px;letter-spacing:.2px}
.anchor-nav{display:flex;flex-direction:column;gap:2px}
.anchor-nav a{
  display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--muted);padding:9px 10px;
  border-radius:10px;transition:background .16s,color .16s;
}
.anchor-nav a::before{content:"";width:6px;height:6px;border-radius:50%;background:#D5D9E2;flex:0 0 6px;transition:background .16s}
.anchor-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.anchor-nav a:hover::before{background:var(--brand)}
.anchor-nav a.is-current{background:var(--brand-soft);color:var(--brand);font-weight:600}
.anchor-nav a.is-current::before{background:var(--brand)}
.side-help{background:var(--brand-soft);border-color:rgba(255,90,31,.16)}
.side-help h3{color:var(--brand-press)}
.side-help p{font-size:14px;color:#7A4A34;line-height:1.7}
.side-help ul{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.side-help li{font-size:13.5px;color:#8A5540;display:flex;gap:8px;line-height:1.6}
.side-help li::before{content:"·";color:var(--brand);font-weight:800}
.side-cta{background:var(--ink);border-color:var(--ink);color:#fff}
.side-cta h3{color:#fff}
.side-cta p{font-size:13.5px;color:rgba(255,255,255,.68);line-height:1.7;margin-bottom:14px}
.side-cta .btn{width:100%;height:44px;font-size:14.5px;background:var(--brand);color:#fff;border-radius:var(--r-pill)}
.side-cta .btn:hover{background:var(--brand-press)}

/* 单列长卡片流 */
.stream-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.stream-head h2{font-size:30px;font-weight:800;color:var(--ink);line-height:1.25}
.stream-head p{font-size:14.5px;color:var(--muted);margin-top:8px;max-width:560px}
.stream-head .more{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.stream-head .more:hover{text-decoration:underline;text-underline-offset:3px}
.stream-list{display:flex;flex-direction:column;gap:22px}
.stream-item{
  display:grid;grid-template-columns:260px minmax(0,1fr);gap:22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.stream-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(255,90,31,.35)}
.stream-thumb{
  position:relative;border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/3;background:#EEF0F5;
}
.stream-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.stream-item:hover .stream-thumb img{transform:scale(1.04)}
.stream-thumb .thumb-index{
  position:absolute;left:10px;top:10px;background:rgba(20,22,28,.72);color:#fff;font-size:12px;
  font-weight:700;padding:4px 10px;border-radius:var(--r-pill);letter-spacing:.5px;
}
.stream-body{display:flex;flex-direction:column;min-width:0}
.stream-body .tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;padding:3px 10px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-press);
}
.tag.cyan{background:rgba(0,199,177,.12);color:#028072}
.tag.grey{background:#F1F3F7;color:var(--muted)}
.stream-body h3{font-size:20px;font-weight:700;line-height:1.4;color:var(--ink);margin-bottom:8px}
.stream-body .desc{
  font-size:14.8px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.stream-foot{
  margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);display:flex;align-items:center;
  justify-content:space-between;gap:16px;
}
.stream-foot .meta{font-size:13px;color:#8B93A1}
.stream-foot .link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.stream-foot .link svg{width:14px;height:14px;fill:currentColor;transition:transform .2s ease}
.stream-item:hover .stream-foot .link svg{transform:translateX(4px)}

/* ============ 流程时间线 ============ */
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:32px;font-weight:800;color:var(--ink);line-height:1.25;letter-spacing:-.3px}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted)}
.section-head.on-dark h2{color:#fff}
.section-head.on-dark p{color:rgba(255,255,255,.7)}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.tl-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);position:relative}
.tl-item .idx{
  font-size:34px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.4px var(--brand);
  margin-bottom:14px;letter-spacing:1px;
}
.tl-item h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:8px}
.tl-item p{font-size:14.5px;color:var(--muted);line-height:1.7}
.tl-item::after{
  content:"";position:absolute;right:-11px;top:42px;width:12px;height:2px;background:var(--line);
}
.tl-item:last-child::after{display:none}

/* ============ 对照表 ============ */
.table-wrap{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff;box-shadow:var(--sh-1)}
table{width:100%;border-collapse:collapse;font-size:14.5px}
thead th{background:var(--ink);color:#fff;text-align:left;padding:15px 20px;font-weight:600;font-size:14px;letter-spacing:.3px}
tbody td{padding:15px 20px;border-top:1px solid var(--line);color:var(--muted);vertical-align:top}
tbody tr:nth-child(odd){background:var(--page)}
tbody tr:nth-child(even){background:#fff}
tbody td strong{color:var(--ink);font-weight:600}
.table-mobile{display:none}

/* ============ FAQ ============ */
.faq-list{width:100%;max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  overflow:hidden;transition:border-color .2s ease;
}
.faq-item[open]{border-color:rgba(255,90,31,.4)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 22px;display:flex;align-items:center;justify-content:space-between;
  gap:18px;font-size:17px;font-weight:600;color:var(--ink);position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .22s ease;
}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--muted);font-size:16px;
  transition:background .2s,color .2s,border-color .2s,transform .25s;
}
.faq-item[open] .faq-icon{background:var(--brand);border-color:var(--brand);color:#fff;transform:rotate(180deg)}
.faq-body{padding:0 22px 22px 26px;font-size:15px;color:var(--muted);line-height:1.85;animation:fadeIn .28s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ============ CTA 表单区 ============ */
.cta-section{
  background:var(--ink);
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
  padding:88px 0;
}
.cta-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);gap:56px;align-items:center}
.cta-copy h2{font-size:34px;font-weight:800;color:#fff;line-height:1.25;letter-spacing:-.3px}
.cta-copy p{margin-top:16px;font-size:16px;color:rgba(255,255,255,.7);max-width:520px}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:26px}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.78)}
.cta-points li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--cyan);margin-top:9px;flex:0 0 8px}
.form-card{background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-2)}
.form-card h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:6px}
.form-card .form-tip{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-input);background:#fff;
  padding:0 14px;font-size:14.5px;color:var(--text);transition:border-color .18s,box-shadow .18s;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.14);
}
.form-card .btn{width:100%;height:48px;font-size:15.5px}
.form-note{margin-top:12px;font-size:12.8px;color:#8B93A1;text-align:center}
.form-msg{display:none;margin-top:12px;font-size:13.5px;color:var(--ok);text-align:center}
.form-msg.is-show{display:block}

/* ============ Footer ============ */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px}
.footer-brand .brand{color:#fff;font-size:16px}
.footer-brand p{margin-top:16px;font-size:14px;color:rgba(255,255,255,.62);line-height:1.8;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.5);margin-bottom:16px;letter-spacing:.4px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.68);padding:5px 0;transition:color .18s}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.68);padding:5px 0;line-height:1.7}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 26px;display:flex;align-items:center;
  justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1100px}
  .page-head h1{font-size:38px}
}
@media (max-width:1023px){
  .nav-links,.nav-search,.btn-ghost-sm{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:72px 0}
  .page-head{padding:22px 0 44px}
  .page-head-grid{grid-template-columns:1fr;gap:28px}
  .page-head h1{font-size:34px}
  .page-head-visual{min-height:200px}
  .metric-strip{grid-template-columns:repeat(2,1fr)}
  .layout-side{grid-template-columns:1fr;gap:28px}
  .sidebar{position:static;order:2}
  .stream-item{grid-template-columns:220px minmax(0,1fr);gap:18px}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .tl-item::after{display:none}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .header-inner{height:56px;gap:12px}
  .brand{font-size:15.5px}
  .brand-mark{width:24px;height:24px;flex:0 0 24px;border-radius:7px}
  .brand-mark svg{width:15px;height:15px}
  .btn-primary-sm{padding:0 14px;font-size:13.5px}
  .section{padding:56px 0}
  .page-head h1{font-size:28px}
  .page-head .lead{font-size:15.5px}
  .page-head-visual{min-height:180px}
  .metric-strip{grid-template-columns:repeat(2,1fr);margin-top:28px}
  .metric-strip .metric{padding:16px}
  .metric .num{font-size:24px}
  .stream-head{flex-direction:column;align-items:flex-start;gap:10px}
  .stream-head h2{font-size:24px}
  .stream-item{grid-template-columns:1fr;padding:16px}
  .stream-thumb{aspect-ratio:16/9}
  .stream-body h3{font-size:18px}
  .timeline{grid-template-columns:1fr}
  .section-head h2{font-size:24px}
  .cta-section{padding:56px 0}
  .cta-copy h2{font-size:26px}
  .form-card{padding:20px}
  .table-wrap{display:none}
  .table-mobile{display:flex;flex-direction:column;gap:14px}
  .tm-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-1)}
  .tm-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:10px}
  .tm-card dl{display:grid;grid-template-columns:88px 1fr;gap:6px 12px;font-size:14px;color:var(--muted)}
  .tm-card dt{color:#8B93A1}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:479px){
  .page-head h1{font-size:25px}
  .metric-strip{grid-template-columns:1fr 1fr}
  .stream-foot{flex-direction:column;align-items:flex-start;gap:8px}
  .btn-primary,.btn-ghost{width:100%}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --brand:#FF5A1F;
  --brand-press:#D63E00;
  --brand-soft:#FFF1EA;
  --cyan:#00C7B1;
  --yellow:#FFD43B;
  --ink:#14161C;
  --text:#1F2329;
  --muted:#5A6270;
  --line:#E6E8EE;
  --bg:#F6F7FA;
  --white:#FFFFFF;
  --ok:#12A87B;
  --warn:#F2A33C;
  --err:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06);
  --sh-2:0 8px 24px rgba(20,22,28,.08);
  --max:1200px;
  --gap:24px;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;}
img{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
svg{display:block;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1;
  border-radius:var(--r-pill);
  padding:13px 26px;
  transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(255,90,31,.24);}
.btn-primary:hover{background:var(--brand-press);transform:translateY(-1px);box-shadow:0 10px 22px rgba(214,62,0,.28);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--brand);border:1px solid rgba(255,90,31,.32);}
.btn-ghost:hover{background:var(--brand-soft);border-color:rgba(255,90,31,.5);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.28);}
.btn-light:hover{background:rgba(255,255,255,.2);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;pointer-events:none;}

.tag{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.02em;
  color:var(--brand);background:var(--brand-soft);
  border-radius:6px;padding:4px 10px;line-height:1.4;
}
.tag-cyan{color:#018A7B;background:rgba(0,199,177,.14);}
.tag-yellow{color:#8A6600;background:rgba(255,212,59,.28);}

.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px;flex-wrap:wrap;}
.section-head h2{font-size:32px;font-weight:700;line-height:1.25;letter-spacing:-.01em;}
.section-head p{color:var(--muted);font-size:15px;max-width:560px;margin-top:10px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  margin-bottom:14px;letter-spacing:.04em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{display:flex;align-items:center;gap:28px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:26px;height:26px;flex:0 0 26px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand);border-radius:8px;
}
.brand-mark svg{width:16px;height:16px;fill:#fff;}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand);font-weight:600;}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search{position:relative;display:block;}
.search svg{
  position:absolute;left:13px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;fill:var(--muted);pointer-events:none;
}
.search input{
  width:220px;height:40px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--bg);
  padding:0 16px 0 36px;
  font-size:14px;outline:none;
  transition:border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.search input::placeholder{color:#9AA1AE;}
.search input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(255,90,31,.12);}
.hamburger{
  display:none;width:42px;height:42px;border-radius:12px;
  align-items:center;justify-content:center;border:1px solid var(--line);
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,22,28,.55);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:20px 20px 96px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--muted);
}
.drawer-search{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--bg);padding:0 18px;font-size:15px;outline:none;margin-bottom:20px;
}
.drawer-search:focus{border-color:var(--brand);background:#fff;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 4px;font-size:16px;font-weight:500;color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a::after{content:"›";color:#C3C8D2;font-size:20px;}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--brand);}
.drawer-cta{
  margin-top:24px;display:flex;flex-direction:column;gap:12px;
}
.mobile-cta-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:65;
  background:#fff;border-top:1px solid var(--line);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  box-shadow:0 -6px 20px rgba(20,22,28,.07);
}

/* ============ 分类头图 ============ */
.cat-hero{
  position:relative;color:#fff;
  background:
    linear-gradient(180deg,rgba(20,22,28,.62),rgba(20,22,28,.78)),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  padding:84px 0 64px;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:120px;
  background:linear-gradient(180deg,rgba(20,22,28,0),rgba(20,22,28,.55));
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.66);margin-bottom:22px;
}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{color:rgba(255,255,255,.35);}
.breadcrumb .now{color:rgba(255,255,255,.92);}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,90,31,.18);
  border:1px solid rgba(255,90,31,.45);
  color:#FFD3C0;font-size:13px;font-weight:600;
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:20px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block;}
.cat-hero h1{
  font-size:clamp(28px,4vw,46px);
  font-weight:800;line-height:1.15;letter-spacing:-.015em;
  max-width:900px;
}
.cat-hero .lede{
  margin-top:18px;max-width:740px;
  font-size:17px;line-height:1.8;color:rgba(255,255,255,.78);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

/* 数据条 */
.metrics-bar{background:#fff;border-bottom:1px solid var(--line);}
.metrics-inner{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px;
  padding:22px 24px;
}
.metric{
  display:flex;align-items:baseline;gap:10px;
  background:var(--bg);border-radius:12px;
  padding:12px 18px;
}
.metric-num{
  font-size:22px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.metric-num.cyan{color:#019A88;}
.metric-label{font-size:13px;color:var(--muted);}
.metric-dot{width:4px;height:4px;border-radius:50%;background:#C7CCD6;flex:0 0 4px;}

/* ============ 瀑布流卡片 ============ */
.waterfall{column-count:3;column-gap:24px;}
.wf-card{
  display:inline-block;width:100%;
  break-inside:avoid;
  margin-bottom:24px;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.wf-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D8DCE5;}
.wf-media{position:relative;overflow:hidden;aspect-ratio:4/3;background:#EDEFF4;}
.wf-card.is-tall .wf-media{aspect-ratio:1/1;}
.wf-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.wf-card:hover .wf-media img{transform:scale(1.04);}
.wf-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,22,28,0) 45%,rgba(20,22,28,.38));
  pointer-events:none;
}
.wf-badge{
  position:absolute;top:12px;left:12px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--brand);
  font-size:12px;font-weight:700;border-radius:8px;padding:5px 10px;
}
.wf-body{padding:22px;}
.wf-body h3{
  font-size:20px;font-weight:600;line-height:1.4;
  margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.wf-body p{
  font-size:14.5px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.wf-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
}
.wf-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.wf-card:hover .wf-link{gap:10px;}
.wf-link .arrow{transition:transform .22s ease;}
.wf-card:hover .wf-link .arrow{transform:translateX(4px);}
.wf-time{font-size:13px;color:#9AA1AE;font-variant-numeric:tabular-nums;}

/* ============ 分段分诊 ============ */
.split{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start;}
.split-aside{position:sticky;top:96px;}
.split-aside h3{font-size:20px;font-weight:700;line-height:1.4;margin-bottom:14px;}
.split-aside p{font-size:14.5px;color:var(--muted);margin-bottom:22px;}
.anchor-list{display:flex;flex-direction:column;gap:8px;}
.anchor-list a{
  display:flex;align-items:center;gap:10px;
  font-size:14.5px;font-weight:500;color:var(--text);
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;
}
.anchor-list a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 6px;}
.anchor-list a:hover{border-color:rgba(255,90,31,.45);color:var(--brand);transform:translateX(2px);}
.split-main{display:flex;flex-direction:column;gap:20px;}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 30px;box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.scene-head{display:flex;align-items:center;gap:14px;margin-bottom:14px;flex-wrap:wrap;}
.scene-num{
  font-size:26px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;line-height:1;
  border:2px solid rgba(255,90,31,.35);border-radius:12px;
  padding:6px 12px;
}
.scene-head h3{font-size:20px;font-weight:600;}
.scene-card > p{font-size:15px;color:var(--muted);margin-bottom:16px;}
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 22px;}
.scene-list li{
  position:relative;padding-left:18px;font-size:14.5px;color:var(--text);
}
.scene-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.step{
  display:flex;gap:20px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(255,90,31,.35);}
.step-idx{
  font-size:30px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:2px rgba(255,90,31,.55);
  font-variant-numeric:tabular-nums;flex:0 0 auto;
}
.step-body h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step-body p{font-size:14.5px;color:var(--muted);}

/* ============ 对照表 ============ */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
table{width:100%;border-collapse:collapse;}
thead th{
  background:var(--ink);color:#fff;
  font-size:14px;font-weight:600;text-align:left;
  padding:16px 22px;white-space:nowrap;
}
tbody td{
  font-size:14.5px;padding:16px 22px;border-top:1px solid var(--line);
  vertical-align:top;
}
tbody tr:nth-child(odd){background:var(--bg);}
tbody tr:nth-child(even){background:#fff;}
tbody td:first-child{font-weight:600;color:var(--ink);}
tbody td:last-child{color:var(--muted);}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:14px;margin-bottom:14px;overflow:hidden;
  box-shadow:var(--sh-1);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:var(--brand);transform:scaleY(0);transform-origin:top;
  transition:transform .28s ease;
}
.faq-item[open]::before{transform:scaleY(1);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;
  font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--brand);
  line-height:1;transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg);}
.faq-item summary:hover{color:var(--brand);}
.faq-body{
  padding:0 24px 22px;font-size:15px;color:var(--muted);
  max-width:760px;animation:fadeIn .3s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ============ CTA / 表单 ============ */
.cta-section{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding:88px 0;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
}
.cta-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr 460px;gap:56px;align-items:center;
}
.cta-grid h2{font-size:34px;font-weight:700;line-height:1.25;margin-bottom:16px;}
.cta-grid .cta-sub{font-size:16px;color:rgba(255,255,255,.72);max-width:520px;}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.cta-points li{
  position:relative;padding-left:22px;font-size:15px;color:rgba(255,255,255,.8);
}
.cta-points li::before{
  content:"";position:absolute;left:0;top:10px;
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
}
.form-card{
  background:#fff;border-radius:var(--r-card);
  padding:28px;box-shadow:0 20px 48px rgba(0,0,0,.28);
}
.form-card h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.form-card .form-hint{font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-input);
  background:#fff;padding:0 14px;font-size:14.5px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input,.field select{height:44px;}
.field textarea{min-height:88px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.13);
}
.form-note{
  font-size:13px;color:var(--ok);margin-top:12px;display:none;
}
.form-note.is-show{display:block;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:72px 0 28px;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand .brand{gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:330px;}
.footer-col h4{
  font-size:14px;font-weight:600;color:rgba(255,255,255,.92);
  margin-bottom:16px;letter-spacing:.02em;
}
.footer-col a,.footer-col p{
  display:block;font-size:14px;color:rgba(255,255,255,.68);
  margin-bottom:10px;line-height:1.7;
}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (min-width:1280px){
  :root{--max:1240px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .search input{width:170px;}
  .section{padding:72px 0;}
  .waterfall{column-count:2;}
  .split{grid-template-columns:1fr;gap:28px;}
  .split-aside{position:static;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  .header-inner{height:56px;gap:12px;}
  .brand-text{font-size:15px;}
  .search,.header-actions .btn-ghost,.header-actions .btn-primary{display:none;}
  .hamburger{display:flex;margin-left:auto;}
  .mobile-cta-bar{display:block;}
  body{padding-bottom:76px;}
  .cat-hero{padding:56px 0 48px;}
  .cat-hero .lede{font-size:15.5px;}
  .hero-actions .btn{width:100%;}
  .metrics-inner{padding:18px 16px;gap:10px;}
  .metric{flex:1 1 calc(50% - 10px);}
  .metric-dot{display:none;}
  .section{padding:56px 0;}
  .section-head h2{font-size:26px;}
  .waterfall{column-count:1;}
  .steps{grid-template-columns:1fr;}
  .scene-list{grid-template-columns:1fr;}
  .scene-card{padding:22px;}
  .cta-grid h2{font-size:26px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .form-card{padding:22px;}
  .table-wrap{background:transparent;border:none;box-shadow:none;overflow:visible;}
  table,tbody,tr,td{display:block;width:100%;}
  thead{display:none;}
  tbody tr{
    background:#fff !important;border:1px solid var(--line);
    border-radius:14px;margin-bottom:14px;padding:8px 18px;box-shadow:var(--sh-1);
  }
  tbody td{border-top:none;padding:10px 0;display:flex;gap:12px;}
  tbody td::before{
    content:attr(data-label);
    flex:0 0 84px;font-size:13px;font-weight:600;color:#9AA1AE;
  }
  tbody td:last-child{border-top:1px dashed var(--line);}
}
@media (max-width:519px){
  .container{padding:0 16px;}
  body{font-size:15px;}
  .cat-hero h1{font-size:26px;}
  .metric{flex:1 1 100%;}
  .wf-body{padding:18px;}
  .wf-body h3{font-size:18px;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;}
  .faq-body{padding:0 18px 18px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}