/* roulang page: index */
:root{
  --brand-700:#103E8C;
  --brand-600:#1B5FD9;
  --brand-500:#3B7BEA;
  --brand-100:#E7EFFD;
  --brand-050:#F4F8FF;
  --accent-500:#FF7A45;
  --ink-900:#0F1B2D;
  --ink-600:#4A5B72;
  --ink-400:#8494A9;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --deep:#0E2143;
  --line:#E4EAF3;
  --divider:#EEF2F8;
  --ok:#12B76A;
  --radius-card:16px;
  --radius-block:24px;
  --radius-btn:10px;
  --radius-img:12px;
  --s1:0 1px 2px rgba(15,27,45,.04);
  --s2:0 6px 20px rgba(15,27,45,.07);
  --s3:0 14px 34px rgba(15,27,45,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--page);
  overflow-x:hidden;
}
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;border:none;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1440px){
  .container{max-width:1320px;}
}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:70;
  height:64px;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out,background .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--s1);}
.nav-inner{
  height:64px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:36px;height:36px;
  border-radius:8px;
  background:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--s1);
  transition:background .2s ease-out,transform .2s ease-out;
}
.brand:hover .brand-mark{background:var(--brand-700);transform:translateY(-1px);}
.brand-text{
  font-size:17px;
  font-weight:600;
  letter-spacing:-.2px;
  color:var(--ink-900);
  white-space:nowrap;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--ink-600);
  border-radius:8px;
  transition:color .2s ease-out,background .2s ease-out;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:var(--brand-050);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-tools{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:230px;
  height:38px;
  padding:0 10px;
  border-radius:10px;
  background:#F2F6FC;
  border:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.nav-search i{font-size:13px;color:var(--ink-400);}
.nav-search input{
  flex:1 1 auto;
  min-width:0;
  border:none;
  background:transparent;
  font-size:14px;
  outline:none;
}
.nav-search input::placeholder{color:var(--ink-400);}
.nav-search:focus-within{
  background:#fff;
  border-color:var(--brand-600);
  box-shadow:var(--s2);
}
.kbd{
  flex:0 0 auto;
  font-size:11px;
  line-height:1;
  padding:4px 6px;
  border-radius:6px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ink-400);
}
.nav-quick{
  font-size:14px;
  color:var(--ink-600);
  padding:6px 4px;
  border-radius:8px;
  transition:color .2s ease-out,background .2s ease-out;
}
.nav-quick:hover{color:var(--brand-600);background:var(--brand-050);}
.nav-toggle{
  display:none;
  width:40px;height:38px;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-900);
  transition:background .2s ease-out,border-color .2s ease-out;
}
.nav-toggle:hover{background:var(--brand-050);border-color:var(--brand-500);}

/* buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .18s ease-out;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--s1);}
.btn-primary:hover{background:var(--brand-700);box-shadow:var(--s2);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--s1);}
.btn-primary:disabled{background:rgba(27,95,217,.4);pointer-events:none;}
.btn-ghost{background:#fff;color:var(--brand-600);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
}
.link-arrow i{transition:transform .2s ease-out;}
.link-arrow:hover i{transform:translateX(3px);}
.link-arrow:hover{color:var(--brand-700);}

/* ---------- Drawer ---------- */
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(88vw,340px);
  height:100%;
  background:#fff;
  z-index:90;
  transform:translateX(100%);
  transition:transform .24s ease-out;
  box-shadow:var(--s3);
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:18px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  color:var(--ink-600);background:#fff;transition:background .2s ease-out;
}
.drawer-close:hover{background:var(--brand-050);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;}
.drawer-nav a{
  padding:12px 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--ink-600);
  border:1px solid transparent;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.drawer-nav a:hover{background:var(--brand-050);color:var(--brand-600);}
.drawer-nav a.active{background:var(--brand-050);color:var(--brand-600);font-weight:600;border-color:#C9DBF8;}
.drawer-search{
  display:flex;align-items:center;gap:8px;
  height:42px;padding:0 12px;border-radius:10px;
  background:#F2F6FC;border:1px solid transparent;
}
.drawer-search:focus-within{background:#fff;border-color:var(--brand-600);}
.drawer-search input{flex:1;border:none;background:transparent;outline:none;font-size:14px;}
.overlay{
  position:fixed;inset:0;background:rgba(15,27,45,.42);
  opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s;
  z-index:80;
}
.overlay.show{opacity:1;visibility:visible;}

/* ---------- Hero ---------- */
main{padding-top:64px;}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{font-size:30px;font-weight:700;letter-spacing:-.4px;line-height:1.25;}
.section-head p{font-size:14px;color:var(--ink-400);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.4px;
  color:var(--brand-600);
  background:var(--brand-100);
  padding:6px 12px;border-radius:999px;
}
.hero{
  position:relative;
  background:linear-gradient(180deg,var(--brand-050) 0%,#FFFFFF 78%);
  padding:80px 0 96px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(27,95,217,.06) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.9;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.hero h1{
  font-size:44px;
  line-height:1.15;
  letter-spacing:-.5px;
  font-weight:700;
  margin:20px 0 18px;
}
.hero h1 em{font-style:normal;color:var(--brand-600);}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:var(--ink-600);
  max-width:34em;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px;}
.trust-row{display:flex;flex-wrap:wrap;gap:22px;}
.trust-item{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-600);
}
.trust-item i{color:var(--brand-600);font-size:14px;}
.hero-visual{position:relative;}
.hero-img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:20px;
  border:1px solid var(--line);
  box-shadow:var(--s2);
  background:var(--brand-050);
}
.float-card{
  position:absolute;
  right:-14px;
  bottom:-26px;
  width:212px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:var(--s3);
  padding:16px;
}
.fc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.fc-label{font-size:12px;color:var(--ink-400);}
.fc-badge{font-size:11px;color:#fff;background:var(--accent-500);padding:3px 8px;border-radius:999px;}
.fc-value{font-size:28px;font-weight:600;color:var(--brand-600);line-height:1.2;}
.fc-bars{display:flex;align-items:flex-end;gap:4px;height:32px;margin-top:10px;}
.fc-bars span{flex:1;background:rgba(27,95,217,.35);border-radius:3px;display:block;}
.fc-bars span:last-child{background:var(--brand-600);}

/* ---------- Metrics ---------- */
.metric-block{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  box-shadow:var(--s1);
  padding:32px;
}
.metric-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.metric-cell{
  padding:0 24px;
  border-left:1px solid var(--divider);
}
.metric-cell:first-child{border-left:none;padding-left:0;}
.metric-cell:last-child{padding-right:0;}
.metric-name{font-size:13px;color:var(--ink-400);margin-bottom:8px;}
.metric-value{
  font-size:36px;font-weight:600;color:var(--brand-600);
  line-height:1.1;letter-spacing:-.5px;
}
.metric-value small{font-size:14px;font-weight:600;color:var(--ink-600);margin-left:4px;letter-spacing:0;}
.metric-delta{
  display:inline-block;
  margin-top:10px;
  font-size:13px;
  color:var(--accent-500);
  background:rgba(255,122,69,.1);
  padding:3px 10px;
  border-radius:999px;
}
.mini-bars{display:flex;align-items:flex-end;gap:4px;height:32px;margin-top:14px;}
.mini-bars span{flex:1;background:rgba(27,95,217,.28);border-radius:3px;display:block;}
.mini-bars span:last-child{background:var(--brand-600);}

/* ---------- Bento service ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.bento .wide{grid-column:span 2;}
.bento-row2{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:20px;
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--s1);
  padding:26px;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8;}
.card-icon{
  width:40px;height:40px;
  border-radius:10px;
  background:var(--brand-100);
  color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
  margin-bottom:16px;
}
.card h3{font-size:17px;font-weight:600;margin-bottom:8px;transition:color .2s ease-out;}
.card:hover h3{color:var(--brand-600);}
.card p{font-size:14px;line-height:1.75;color:var(--ink-600);margin-bottom:18px;}
.card-foot{margin-top:auto;}
.card-cover{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
  margin-bottom:18px;
  background:var(--brand-050);
}
.wide-split{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:22px;
  align-items:center;
}

/* ---------- CMS list ---------- */
.cms-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.cms-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--s1);
  overflow:hidden;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.cms-card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8;}
.cms-thumb{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  background:var(--brand-050);
  border-bottom:1px solid var(--line);
}
.cms-thumb-ph{
  width:100%;
  aspect-ratio:16/10;
  background:var(--brand-050);
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-500);font-size:22px;
}
.cms-body{padding:20px;display:flex;flex-direction:column;flex:1 1 auto;}
.badge{
  display:inline-block;
  font-size:12px;
  padding:5px 10px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-600);
  line-height:1.4;
}
.badge-accent{background:var(--accent-500);color:#fff;}
.cms-card h3{
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  margin:12px 0 8px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .2s ease-out;
}
.cms-card:hover h3{color:var(--brand-600);}
.cms-card .cms-sum{
  font-size:14px;
  color:var(--ink-600);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
}
.cms-meta{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;
  border-top:1px solid var(--divider);
  font-size:13px;
  color:var(--ink-400);
}
.cms-meta i{color:var(--brand-500);}
.empty-state{
  grid-column:1/-1;
  min-height:180px;
  border-radius:var(--radius-card);
  background:var(--brand-050);
  border:1px dashed #C9DBF8;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:10px;
  color:var(--ink-600);
  font-size:14px;
}
.empty-state i{font-size:24px;color:var(--brand-500);}

/* ---------- Compare ---------- */
.compare{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  box-shadow:var(--s1);
  overflow:hidden;
}
.compare-col{padding:0;}
.compare-head{
  padding:16px 24px;
  font-size:15px;
  font-weight:600;
}
.compare-head.grey{background:#F2F6FC;color:var(--ink-600);border-bottom:1px solid var(--line);}
.compare-head.blue{background:var(--brand-600);color:#fff;border-bottom:1px solid var(--brand-700);}
.compare-col:last-child{border-left:1px solid var(--divider);}
.compare-row{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:15px 24px;
  font-size:14px;
  color:var(--ink-600);
  border-bottom:1px solid var(--divider);
  line-height:1.7;
}
.compare-row:last-child{border-bottom:none;}
.compare-row i{flex:0 0 auto;margin-top:4px;font-size:12px;}
.cg i{color:var(--ink-400);}
.cb i{color:var(--brand-600);}
.cb{color:var(--ink-900);}
.compare-row span.name{
  display:block;
  font-size:12px;
  color:var(--ink-400);
  margin-bottom:2px;
}

/* ---------- Steps ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.step{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--s1);
  padding:24px;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.step:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8;}
.step-no{
  width:32px;height:32px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-600);
  font-size:14px;font-weight:600;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;
}
.step h3{font-size:16px;font-weight:600;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-600);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--s1);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:#C9DBF8;box-shadow:var(--s2);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{
  flex:0 0 auto;
  width:24px;height:24px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-600);
  transition:transform .22s ease-out;
}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-answer{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-600);
  max-width:42em;
}

/* ---------- CTA ---------- */
.cta-block{
  background:linear-gradient(180deg,var(--brand-050) 0%,#FFFFFF 100%);
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  box-shadow:var(--s1);
  padding:40px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.cta-block h2{font-size:28px;font-weight:700;letter-spacing:-.4px;line-height:1.3;margin-bottom:14px;}
.cta-block .cta-desc{font-size:15px;color:var(--ink-600);line-height:1.8;margin-bottom:20px;}
.check-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--ink-600);
  margin-bottom:10px;
}
.check-list i{color:var(--ok);margin-top:4px;font-size:13px;}
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--s2);
  padding:26px;
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  padding:0 12px;
  height:44px;
  background:#fff;
  font-size:14px;
  outline:none;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{height:auto;padding:10px 12px;resize:vertical;min-height:88px;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-600);
  box-shadow:0 0 0 2px rgba(27,95,217,.16);
}
.field input:disabled{background:#F2F6FC;color:var(--ink-400);}
.privacy-note{font-size:12px;color:var(--ink-400);margin-top:12px;line-height:1.7;}
.agree{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:var(--ink-400);margin-top:10px;}
.agree input{margin-top:4px;}
.form-msg{
  display:none;
  margin-top:12px;
  font-size:13px;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:10px;
  padding:10px 12px;
}
.form-msg.show{display:block;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--deep);
  color:#C7D3E4;
  padding:64px 0 24px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand-600);}
.footer-brand span{color:#fff;font-size:17px;font-weight:600;}
.site-footer p{font-size:14px;line-height:1.85;color:#C7D3E4;max-width:30em;}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px;}
.footer-links li{margin-bottom:9px;}
.footer-links a{
  font-size:14px;
  color:#C7D3E4;
  transition:color .2s ease-out;
}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:22px;
  font-size:13px;
  color:#8FA3BF;
}
.to-top{
  width:40px;height:40px;
  border-radius:999px;
  background:var(--brand-600);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;
  transition:opacity .22s ease-out,visibility .22s,background .2s ease-out,transform .2s ease-out;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{background:var(--brand-500);transform:translateY(-2px);}
.to-top:active{transform:translateY(1px);}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .nav-search{width:190px;}
}
@media (max-width:1023px){
  .nav-menu,.nav-search,.nav-quick{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-inner{gap:16px;justify-content:space-between;}
  .nav-tools{gap:10px;}
  .hero{padding:48px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:34px;}
  .float-card{position:static;width:100%;margin-top:16px;right:auto;bottom:auto;}
  .section{padding:64px 0;}
  .section-tight{padding:48px 0;}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:24px 0;}
  .metric-cell{padding:0 20px;}
  .metric-cell:nth-child(odd){border-left:none;padding-left:0;}
  .metric-cell:nth-child(even){padding-right:0;}
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento .wide{grid-column:span 2;}
  .bento-row2{grid-template-columns:repeat(2,1fr);}
  .cms-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .cta-block{grid-template-columns:1fr;gap:28px;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .wide-split{grid-template-columns:1fr;}
}
@media (max-width:767px){
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .section-head h2{font-size:24px;}
  .hero h1{font-size:30px;letter-spacing:-.3px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .trust-row{gap:14px;flex-direction:column;}
  .metric-block{padding:24px 20px;}
  .metric-value{font-size:30px;}
  .compare{grid-template-columns:1fr;}
  .compare-col:last-child{border-left:none;border-top:1px solid var(--divider);}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-block h2{font-size:24px;}
}
@media (max-width:520px){
  .bento,.bento-row2,.cms-grid,.steps{grid-template-columns:1fr;}
  .bento .wide{grid-column:span 1;}
  .metric-grid{grid-template-columns:1fr;gap:0;}
  .metric-cell{border-left:none;padding:16px 0;border-top:1px solid var(--divider);}
  .metric-cell:first-child{border-top:none;padding-top:0;}
  .metric-cell:last-child{padding-bottom:0;}
  .card{padding:20px;}
  .faq-item summary{font-size:15px;padding:16px 18px;}
  .faq-answer{padding:0 18px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --brand-700:#103E8C;
  --brand-600:#1B5FD9;
  --brand-500:#3B7BEA;
  --brand-100:#E7EFFD;
  --brand-050:#F4F8FF;
  --accent-500:#FF7A45;
  --ink-900:#0F1B2D;
  --ink-600:#4A5B72;
  --ink-400:#8494A9;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --deep:#0E2143;
  --line:#E4EAF3;
  --divider:#EEF2F8;
  --ok:#12B76A;
  --err:#F04438;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:10px;
  --r-img:12px;
  --s1:0 1px 2px rgba(15,27,45,.04);
  --s2:0 6px 20px rgba(15,27,45,.07);
  --s3:0 14px 34px rgba(15,27,45,.10);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html body{
  margin:0;
  background:var(--page);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.1px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.num{font-variant-numeric:tabular-nums}
::selection{background:var(--brand-100);color:var(--brand-700)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1440px){.container{max-width:1320px}}

/* ===== 顶部导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out,background .2s ease-out;
}
.site-header.scrolled{box-shadow:var(--s1);background:rgba(255,255,255,.96)}
.nav-inner{
  height:64px;display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(160deg,var(--brand-600),var(--brand-700));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--s1);
}
.brand-text{font-size:17px;font-weight:600;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:6px;flex:1 1 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:34px;padding:0 12px;border-radius:8px;
  font-size:14.5px;color:var(--ink-600);
  transition:color .18s ease-out,background .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-15px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:center;transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:var(--brand-050)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:38px;padding:0 10px;
  background:#F2F6FC;border:1px solid transparent;border-radius:var(--r-btn);
  transition:all .18s ease-out;
}
.cmd-search i{color:var(--ink-400);font-size:13px}
.cmd-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.cmd-search input::placeholder{color:var(--ink-400)}
.cmd-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 1px var(--brand-600),var(--s2)}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border-radius:6px;
  background:#fff;border:1px solid var(--line);color:var(--ink-400);
}
.quick-link{font-size:14px;color:var(--ink-600);transition:color .18s ease-out}
.quick-link:hover{color:var(--brand-600)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:all .2s ease-out;
}
.btn i{font-size:13px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--s1)}
.btn-primary:hover{background:var(--brand-700);box-shadow:var(--s2);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--s1)}
.btn-primary:disabled{background:rgba(27,95,217,.4);pointer-events:none;box-shadow:none}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand-500);background:var(--brand-050);box-shadow:var(--s1)}
.btn-outline:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn:focus-visible,.nav-link:focus-visible,.quick-link:focus-visible,.cmd-search:focus-within,.card:focus-visible,a:focus-visible{
  outline:2px solid var(--brand-600);outline-offset:2px;
}
.hamburger{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;color:var(--ink-900);
  align-items:center;justify-content:center;cursor:pointer;
}
.hamburger:hover{background:var(--brand-050);border-color:var(--brand-500)}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(320px,86vw);z-index:1000;
  background:#fff;box-shadow:var(--s3);padding:20px;
  transform:translateX(102%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;gap:18px;
}
.drawer.open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,27,45,.42);z-index:990;
  opacity:0;pointer-events:none;transition:opacity .24s ease-out;
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:36px;height:36px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer}
.drawer .nav-link{height:44px;padding:0 12px;font-size:16px;background:var(--brand-050)}
.drawer .nav-link::after{display:none}
.drawer .nav-link.active{background:var(--brand-100);color:var(--brand-600)}
.drawer-nav{display:flex;flex-direction:column;gap:8px}

/* ===== 文章头部 ===== */
.page-main{padding-top:64px}
.article-head{
  background:linear-gradient(180deg,var(--brand-050) 0%,#FFFFFF 100%);
  border-bottom:1px solid var(--line);
  padding:36px 0 32px;
  position:relative;overflow:hidden;
}
.article-head::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(27,95,217,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.55;pointer-events:none;
}
.article-head .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--ink-400);margin-bottom:18px;
}
.breadcrumb a{color:var(--brand-600);transition:color .18s ease-out}
.breadcrumb a:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:var(--ink-400)}
.breadcrumb .current{color:var(--ink-600);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 10px;border-radius:999px;font-size:12px;line-height:1;
  background:var(--brand-100);color:var(--brand-600);font-weight:600;
}
.badge-accent{background:var(--accent-500);color:#fff}
.article-title{
  font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-.4px;
  margin:14px 0 0;max-width:900px;word-break:break-word;
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  min-height:26px;margin-top:18px;padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-400);
}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-dot{width:3px;height:3px;border-radius:50%;background:var(--ink-400);display:inline-block}

/* ===== 正文布局 ===== */
.article-wrap{padding:44px 0 8px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.article-col{max-width:780px;margin:0 auto;width:100%}
.toc{display:none}
.toc-card{
  position:sticky;top:96px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--s1);padding:18px 16px;
}
.toc-card h3{font-size:13px;font-weight:600;color:var(--ink-400);letter-spacing:1px;margin-bottom:10px}
.toc-card a{
  display:block;font-size:13.5px;color:var(--ink-600);padding:6px 0 6px 10px;
  border-left:2px solid var(--divider);transition:all .18s ease-out;
}
.toc-card a:hover,.toc-card a.active{color:var(--brand-600);border-left-color:var(--brand-600);background:var(--brand-050)}
@media (min-width:1280px){
  .article-layout{grid-template-columns:200px minmax(0,1fr)}
  .toc{display:block}
}

.article-body{font-size:17px;line-height:1.9;color:#1B2A3F;word-break:break-word}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:24px;font-weight:700;line-height:1.4;color:var(--ink-900);
  margin:40px 0 14px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:19px;font-weight:600;color:var(--ink-900);margin:30px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:8px;color:#1B2A3F}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:13px;width:6px;height:6px;border-radius:50%;background:var(--brand-600);
}
.article-body ol{counter-reset:li}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:8px}
.article-body ol li::before{
  counter-increment:li;content:counter(li);
  position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-600);font-size:11px;font-weight:600;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--brand-600);background:var(--brand-050);
  border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-600);font-size:15px;line-height:1.85;
}
.article-body img{
  width:100%;height:auto;border-radius:var(--r-img);border:1px solid var(--line);
  margin:22px 0 8px;
}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:8px}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.article-body th{background:var(--brand-050);font-weight:600;color:var(--ink-900)}
.article-body tbody tr{transition:background .18s ease-out}
.article-body tbody tr:hover{background:#F7F9FC}
.article-body a{
  color:var(--brand-600);border-bottom:1px solid rgba(27,95,217,.35);transition:all .18s ease-out;
}
.article-body a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700);background:var(--brand-050)}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:32px 0}
.article-body code{
  background:var(--brand-050);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;font-size:15px;color:var(--brand-700);
}

/* 空态 */
.empty-state{
  min-height:200px;background:var(--brand-050);border:1px solid var(--line);
  border-radius:var(--r-card);padding:36px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
}
.empty-state i{font-size:26px;color:var(--brand-500)}
.empty-state p{font-size:14px;color:var(--ink-600);margin:0}
.empty-state .btn{margin-top:6px}

/* ===== 标签与分享 ===== */
.article-foot{margin-top:40px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;font-size:12.5px;
  background:var(--brand-050);border:1px solid var(--line);color:var(--ink-600);
  transition:all .18s ease-out;
}
.tag:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-100)}
.share-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:22px;padding-top:22px;border-top:1px solid var(--divider);
}
.share-row .label{font-size:13px;color:var(--ink-400)}

/* ===== 相关推荐 ===== */
.section{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{font-size:30px;font-weight:700;letter-spacing:-.3px;line-height:1.25}
.section-head .sub{font-size:14px;color:var(--ink-400);margin-top:6px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
  transition:gap .2s ease-out,color .18s ease-out;
}
.text-link:hover{gap:10px;color:var(--brand-700)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);
  overflow:hidden;transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8}
.card-media{position:relative;aspect-ratio:16/10;background:var(--brand-050);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;left:12px;top:12px;background:#fff;box-shadow:var(--s1)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5;transition:color .18s ease-out}
.card:hover .card-body h3{color:var(--brand-600)}
.card-body p{font-size:14px;color:var(--ink-600);line-height:1.7}
.card-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-400);
}
.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 上下篇 */
.prevnext{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.prevnext-item{
  display:flex;flex-direction:column;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--s1);
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.prevnext-item:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8}
.prevnext-item .k{font-size:12.5px;color:var(--ink-400)}
.prevnext-item .t{font-size:16px;font-weight:600;line-height:1.5}
.prevnext-item .t:hover{color:var(--brand-600)}
.prevnext-item.muted{background:#FBFCFE;color:var(--ink-400)}
.back-center{display:flex;justify-content:center;margin-top:30px}

/* ===== 表单 CTA ===== */
.cta-band{
  background:var(--deep);border-radius:var(--r-lg);
  padding:44px;display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:40px;align-items:start;
}
.cta-band h2{color:#fff;font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.3px}
.cta-band .desc{color:#C7D3E4;font-size:15px;line-height:1.85;margin-top:14px;max-width:420px}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;align-items:flex-start;gap:10px;color:#E3EBF7;font-size:14.5px}
.cta-points i{color:var(--brand-500);margin-top:4px;font-size:13px}
.form-card{
  background:#fff;border-radius:var(--r-card);padding:26px;box-shadow:var(--s2);
  display:flex;flex-direction:column;gap:16px;
}
.form-card h3{font-size:18px;font-weight:600}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:13px;font-weight:600;color:var(--ink-600)}
.field input,.field select,.field textarea{
  height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;outline:none;transition:all .18s ease-out;
}
.field textarea{height:88px;padding:11px 14px;resize:vertical;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand-600);box-shadow:0 0 0 1px var(--brand-600)}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--brand-500)}
.form-note{font-size:12px;color:var(--ink-400);display:flex;align-items:flex-start;gap:8px;line-height:1.6}
.form-note input{width:15px;height:15px;margin-top:2px;accent-color:var(--brand-600)}
.form-card .btn{width:100%}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--s1);
  overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item:hover{border-color:#C9DBF8;box-shadow:var(--s2)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--brand-100);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform .22s ease-out,background .22s ease-out;
}
.faq-item[open] summary .plus{transform:rotate(45deg);background:var(--brand-600);color:#fff}
.faq-item .answer{
  padding:0 22px 20px;font-size:15px;color:var(--ink-600);line-height:1.85;max-width:680px;
}

/* ===== 页脚 ===== */
.site-footer{background:var(--deep);color:#C7D3E4;margin-top:72px;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:600;margin-bottom:14px}
.footer-brand .brand-mark{background:linear-gradient(160deg,var(--brand-500),var(--brand-700))}
.site-footer p{font-size:14px;line-height:1.85;color:#AFC0D6;max-width:360px}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:#C7D3E4;transition:color .18s ease-out}
.footer-links a:hover{color:#fff}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#9FB1C9;
}
.to-top{
  width:40px;height:40px;border-radius:50%;background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:all .22s ease-out;
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--brand-700);transform:translateY(-2px)}

/* ===== 响应式 ===== */
@media (max-width:1180px){
  .cmd-search{width:180px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .cmd-search{display:none}
  .quick-link{display:none}
  .hamburger{display:inline-flex}
  .article-title{font-size:28px}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:32px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section-head h2{font-size:24px}
}
@media (max-width:640px){
  html body{font-size:15.5px}
  .page-main{padding-top:56px}
  .nav-inner{height:56px;gap:12px}
  .brand-text{font-size:16px}
  .article-head{padding:26px 0 24px}
  .article-title{font-size:24px}
  .article-body{font-size:16.5px;line-height:1.85}
  .article-body h2{font-size:20px;margin-top:32px}
  .article-body h3{font-size:17.5px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .prevnext{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:24px;border-radius:var(--r-card)}
  .cta-band h2{font-size:21px}
  .form-card{padding:20px}
  .section{padding:44px 0}
  .faq-item summary{padding:16px;font-size:15px}
  .faq-item .answer{padding:0 16px 18px}
  .breadcrumb .current{max-width:180px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --brand-700:#103E8C;
  --brand-600:#1B5FD9;
  --brand-500:#3B7BEA;
  --brand-100:#E7EFFD;
  --brand-050:#F4F8FF;
  --accent-500:#FF7A45;
  --ink-900:#0F1B2D;
  --ink-600:#4A5B72;
  --ink-400:#8494A9;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --deep:#0E2143;
  --line:#E4EAF3;
  --divider:#EEF2F8;
  --ok:#12B76A;
  --err:#F04438;
  --s1:0 1px 2px rgba(15,27,45,.04);
  --s2:0 6px 20px rgba(15,27,45,.07);
  --s3:0 14px 34px rgba(15,27,45,.10);
  --r-card:16px;
  --r-block:24px;
  --r-btn:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--page);
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1440px){.container{max-width:1320px}}
section[id],div[id].anchor{scroll-margin-top:84px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:saturate(180%) blur(8px);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--s1)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--brand-600);
  display:grid;place-items:center;box-shadow:var(--s1);flex:0 0 auto;
}
.brand-text{font-size:17px;font-weight:600;color:var(--ink-900)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:15px;color:var(--ink-600);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:var(--brand-050)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;width:236px;height:38px;padding:0 12px;
  border-radius:10px;background:#F2F6FC;border:1px solid transparent;
  color:var(--ink-400);cursor:text;
  transition:background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.command-search:hover{background:#EDF3FB}
.command-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:var(--s2)}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink-900);
}
.command-search input::placeholder{color:var(--ink-400)}
.command-search kbd{
  flex:0 0 auto;font-family:inherit;font-size:11px;line-height:1;
  padding:4px 6px;border-radius:6px;background:#fff;border:1px solid var(--line);color:var(--ink-400);
}
.header-quick{font-size:14px;color:var(--ink-600);padding:6px 4px;transition:color .18s ease-out}
.header-quick:hover{color:var(--brand-600)}
.menu-toggle{
  display:none;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-900);
  cursor:pointer;transition:background-color .18s ease-out,border-color .18s ease-out;
}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-500);color:var(--brand-600)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--s1)}
.btn-primary:hover{background:var(--brand-700);box-shadow:var(--s2);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-primary[disabled]{opacity:.4;pointer-events:none}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost i{transition:transform .18s ease-out}
.btn-ghost:hover i{transform:translateX(2px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-size:14px;font-weight:600}
.text-link i{transition:transform .18s ease-out}
.text-link:hover i{transform:translateX(2px)}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,27,45,.42);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;
}
.drawer-mask.open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;z-index:80;width:86%;max-width:360px;height:100vh;
  background:#fff;box-shadow:var(--s3);padding:20px;overflow-y:auto;
  transform:translateX(102%);transition:transform .22s ease-out;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-head span{font-size:16px;font-weight:600}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;
  cursor:pointer;color:var(--ink-600);transition:background-color .18s ease-out,color .18s ease-out;
}
.drawer-close:hover{background:var(--brand-050);color:var(--brand-600)}
.drawer-nav{display:grid;gap:6px;margin-bottom:18px}
.drawer-link{padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-600);background:#F7F9FC;transition:background-color .18s ease-out,color .18s ease-out}
.drawer-link:hover{background:var(--brand-050);color:var(--brand-600)}
.drawer-link.active{background:var(--brand-100);color:var(--brand-600);font-weight:600}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;border-radius:10px;background:#F2F6FC;border:1px solid var(--line);margin-bottom:14px}
.drawer-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.drawer-cta{width:100%}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:52px 0 40px;
  background:linear-gradient(180deg,var(--brand-050) 0%,#fff 72%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:radial-gradient(var(--brand-600) 1px,transparent 1px);
  background-size:22px 22px;
}
.hero-grid{position:relative;z-index:1;align-items:center}
.breadcrumb{font-size:13px;color:var(--ink-400);margin-bottom:14px}
.breadcrumb a{color:var(--brand-600)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px;color:var(--ink-400)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);
  font-size:12px;font-weight:600;
}
h1{font-size:44px;line-height:1.15;letter-spacing:-.5px;font-weight:700;margin:16px 0 16px}
.hero-desc{font-size:16px;line-height:1.8;color:var(--ink-600);max-width:34em;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:20px;border:1px solid var(--line);box-shadow:var(--s2);
}
.anchor-tabs{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:10px;margin-top:36px}
.anchor-tab{
  padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--ink-600);
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out;
}
.anchor-tab:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050);box-shadow:var(--s1)}

/* ---------- 板块 ---------- */
.section{padding:64px 0}
.section-head{max-width:760px;margin-bottom:32px}
.section-eyebrow{font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.5px;margin-bottom:10px}
.section-title{font-size:30px;line-height:1.25;font-weight:700;margin-bottom:12px}
.section-sub{font-size:15px;color:var(--ink-600)}

/* ---------- 指标条 ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-block);
  box-shadow:var(--s1);overflow:hidden;
}
.metric-cell{padding:28px 32px;border-right:1px solid var(--divider)}
.metric-cell:last-child{border-right:0}
.metric-name{font-size:13px;color:var(--ink-400);margin-bottom:8px}
.metric-value{
  font-size:36px;font-weight:600;line-height:1.1;color:var(--brand-600);
  font-variant-numeric:tabular-nums;
}
.metric-value em{font-style:normal;font-size:14px;font-weight:500;color:var(--ink-600);margin-left:6px}
.metric-note{font-size:13px;color:var(--ink-600);margin-top:8px}
.metric-trend{display:inline-flex;margin-top:10px;padding:3px 8px;border-radius:999px;background:#FFF1EA;color:var(--accent-500);font-size:12px;font-weight:600}

/* ---------- 时间线 ---------- */
.timeline{display:grid;gap:20px}
.tl-item{display:grid;grid-template-columns:56px 1fr;gap:20px;position:relative}
.tl-item::before{
  content:"";position:absolute;left:27px;top:52px;bottom:-20px;width:1px;background:var(--line);
}
.tl-item:last-child::before{display:none}
.tl-dot{
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);border:1px solid #D3E2FB;
  font-size:18px;font-weight:700;position:relative;z-index:1;font-variant-numeric:tabular-nums;
}
.tl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);padding:22px 26px;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.tl-card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8}
.tl-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.tl-card p{font-size:15px;color:var(--ink-600)}
.tl-tip{margin-top:14px;padding:10px 14px;border-radius:10px;background:var(--brand-050);color:var(--brand-700);font-size:13px}

/* ---------- 图文交替 ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.feature-row + .feature-row{margin-top:56px}
.feature-row.reverse .feature-media{order:2}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);box-shadow:var(--s2);
}
.feature-body h3{font-size:24px;line-height:1.3;font-weight:700;margin-bottom:12px}
.feature-body p{font-size:15px;color:var(--ink-600);margin-bottom:14px}
.check-list{list-style:none;padding:0;display:grid;gap:10px}
.check-list li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-600)}
.check-list li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-600);
}

/* ---------- 要点清单 ---------- */
.key-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:26px 44px}
.key-item{position:relative;padding-left:22px}
.key-item::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--brand-600);
}
.key-title{display:block;font-size:16px;font-weight:600;margin-bottom:6px}
.key-text{display:block;font-size:14px;line-height:1.8;color:var(--ink-600)}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--s1);
  overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:#C9DBF8;box-shadow:var(--s2)}
.faq-q{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;
}
.faq-q::-webkit-details-marker{display:none}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);font-size:12px;
  transition:transform .2s ease-out,background-color .2s ease-out;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand-600);color:#fff}
.faq-q:hover{color:var(--brand-600)}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink-600)}

/* ---------- CTA ---------- */
.cta-band{
  border:1px solid var(--brand-500);border-radius:var(--r-block);background:var(--brand-050);
  padding:40px 44px;display:grid;grid-template-columns:1.5fr .9fr;gap:28px;align-items:center;
}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.3;margin-bottom:10px}
.cta-band p{font-size:15px;color:var(--ink-600)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#C7D3E4;padding:64px 0 28px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand span:last-child{color:#fff;font-size:17px;font-weight:600}
.footer-brand .brand-mark{background:var(--brand-600)}
.site-footer p{font-size:14px;line-height:1.85;color:#C7D3E4;max-width:34em}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links{list-style:none;padding:0;display:grid;gap:10px}
.footer-links a{font-size:14px;color:#C7D3E4;transition:color .18s ease-out}
.footer-links a:hover{color:#fff}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#93A5BF;
}
.to-top{
  width:40px;height:40px;border-radius:50%;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;flex:0 0 auto;
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out,background-color .18s ease-out;
}
.to-top:hover{background:var(--brand-500)}
.to-top.show{opacity:1;visibility:visible}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .command-search{display:none}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .header-quick{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{height:56px}
  .section{padding:56px 0}
  h1{font-size:32px}
  .section-title{font-size:24px}
  .feature-row{gap:28px}
  .cta-band{grid-template-columns:1fr;padding:32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .page-hero{padding:36px 0 32px}
  h1{font-size:30px}
  .hero-grid{gap:28px}
  .metric-strip{grid-template-columns:1fr}
  .metric-cell{border-right:0;border-bottom:1px solid var(--divider)}
  .metric-cell:last-child{border-bottom:0}
  .feature-row{grid-template-columns:1fr}
  .feature-row.reverse .feature-media{order:0}
  .key-list{grid-template-columns:1fr}
  .cta-band h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .brand-text{font-size:16px}
  .hero-actions .btn{width:100%}
  .metric-cell{padding:22px 20px}
  .metric-value{font-size:30px}
  .tl-item{grid-template-columns:44px 1fr;gap:14px}
  .tl-dot{width:44px;height:44px;font-size:16px}
  .tl-item::before{left:21px;top:42px}
  .tl-card{padding:18px 20px}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category1 */
:root{
    --brand-700:#103E8C;
    --brand-600:#1B5FD9;
    --brand-500:#3B7BEA;
    --brand-100:#E7EFFD;
    --brand-050:#F4F8FF;
    --accent-500:#FF7A45;
    --ink-900:#0F1B2D;
    --ink-600:#4A5B72;
    --ink-400:#8494A9;
    --page:#F7F9FC;
    --card:#FFFFFF;
    --deep:#0E2143;
    --line:#E4EAF3;
    --line-strong:#C9DBF8;
    --divider:#EEF2F8;
    --success:#12B76A;
    --danger:#F04438;
    --r-btn:10px;
    --r-card:16px;
    --r-img:14px;
    --r-lg:24px;
    --s1:0 1px 2px rgba(15,27,45,.04);
    --s2:0 6px 20px rgba(15,27,45,.07);
    --s3:0 14px 34px rgba(15,27,45,.10);
    --container:1200px;
    --header-h:64px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--page);
    color:var(--ink-900);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  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;}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
  @media (min-width:1440px){:root{--container:1320px;}}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:saturate(180%) blur(10px);
    backdrop-filter:saturate(180%) blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease-out;
  }
  .site-header.is-scrolled{box-shadow:var(--s1);}
  .header-inner{display:flex;align-items:center;gap:28px;height:var(--header-h);}
  .brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:600;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap;}
  .brand-mark{
    width:32px;height:32px;border-radius:8px;background:var(--brand-600);
    display:inline-flex;align-items:center;justify-content:center;flex:0 0 32px;
    box-shadow:var(--s1);
  }
  .brand:hover .brand-mark{background:var(--brand-700);}
  .brand:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:8px;}
  .nav-menu{display:flex;align-items:center;gap:22px;margin-right:auto;}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:var(--header-h);
    font-size:15px;color:var(--ink-600);transition:color .2s ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
    background:transparent;transition:background .2s ease-out;
  }
  .nav-link:hover{color:var(--ink-900);}
  .nav-link:hover::after{background:var(--brand-100);}
  .nav-link.active{color:var(--brand-600);font-weight:600;}
  .nav-link.active::after{background:var(--brand-600);}
  .nav-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
  .header-actions{display:flex;align-items:center;gap:14px;}
  .cmd-search{
    display:flex;align-items:center;gap:8px;width:240px;height:38px;padding:0 10px;
    background:#F2F6FC;border:1px solid transparent;border-radius:var(--r-btn);
    transition:background .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .cmd-search i{color:var(--ink-400);font-size:13px;}
  .cmd-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;}
  .cmd-search input::placeholder{color:var(--ink-400);}
  .cmd-search .kbd{
    font-size:11px;color:var(--ink-400);background:#fff;border:1px solid var(--line);
    border-radius:6px;padding:1px 6px;white-space:nowrap;
  }
  .cmd-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:var(--s2);}
  .header-link{font-size:14px;color:var(--ink-600);}
  .header-link:hover{color:var(--brand-600);}
  .header-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:6px;}
  .nav-toggle{
    display:none;width:40px;height:38px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
    color:var(--ink-900);cursor:pointer;align-items:center;justify-content:center;transition:background .18s,border-color .18s;
  }
  .nav-toggle:hover{background:var(--brand-050);border-color:var(--brand-500);}
  .nav-toggle:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

  .drawer{
    display:none;border-top:1px solid var(--line);background:#fff;padding:16px 20px 22px;
  }
  .drawer.is-open{display:block;}
  .drawer .nav-link{height:auto;padding:12px 0;font-size:16px;width:100%;}
  .drawer .nav-link::after{display:none;}
  .drawer .cmd-search{width:100%;margin:12px 0;}
  .drawer .btn{width:100%;margin-top:6px;}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;white-space:nowrap;
    transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
  }
  .btn i{font-size:13px;}
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--s1);}
  .btn-primary:hover{background:var(--brand-700);box-shadow:var(--s2);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(1px);box-shadow:var(--s1);}
  .btn-primary:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
  .btn-primary:disabled,.btn-primary.is-disabled{background:rgba(27,95,217,.4);pointer-events:none;box-shadow:none;}
  .btn-outline{background:#fff;border-color:var(--line);color:var(--brand-600);}
  .btn-outline:hover{border-color:var(--brand-500);background:var(--brand-050);transform:translateY(-1px);}
  .btn-outline:active{transform:translateY(1px);}
  .btn-outline:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
  .btn-sm{height:38px;padding:0 16px;font-size:14px;}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-size:14px;font-weight:600;
  }
  .link-arrow i{transition:transform .2s ease-out;}
  .link-arrow:hover i{transform:translateX(3px);}
  .link-arrow:hover{color:var(--brand-700);}
  .link-arrow:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:6px;}

  /* ---------- hero ---------- */
  .page-hero{
    background:linear-gradient(180deg,var(--brand-050) 0%,#FFFFFF 78%);
    padding:36px 0 12px;position:relative;overflow:hidden;
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(rgba(27,95,217,.16) 1px,transparent 1px);
    background-size:22px 22px;opacity:.28;pointer-events:none;
  }
  .page-hero .container{position:relative;}
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);}
  .crumb a{color:var(--brand-600);}
  .crumb a:hover{text-decoration:underline;text-underline-offset:3px;}
  .crumb span.sep{color:var(--line-strong);}
  .hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:44px;align-items:center;padding:26px 0 40px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--brand-700);
    background:var(--brand-100);border-radius:999px;padding:6px 12px;
  }
  .page-title{
    margin-top:16px;font-size:44px;line-height:1.15;font-weight:700;letter-spacing:-.5px;color:var(--ink-900);
  }
  .page-title em{font-style:normal;color:var(--brand-600);}
  .hero-lead{margin-top:14px;font-size:16px;color:var(--ink-600);max-width:44ch;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
  .anchor-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
  .anchor-tabs a{
    font-size:14px;color:var(--ink-600);background:#fff;border:1px solid var(--line);
    border-radius:999px;padding:7px 14px;transition:all .18s ease-out;
  }
  .anchor-tabs a:hover{color:var(--brand-600);border-color:var(--brand-500);background:var(--brand-050);}
  .anchor-tabs a:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
  .hero-figure{position:relative;}
  .hero-figure img{
    width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;
    border:1px solid var(--line);box-shadow:var(--s2);background:var(--brand-050);
  }
  .float-card{
    position:absolute;right:-12px;bottom:-18px;background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--s3);padding:14px 18px;min-width:172px;
  }
  .float-card .fc-label{font-size:12px;color:var(--ink-400);}
  .float-card .fc-value{font-size:24px;font-weight:600;color:var(--brand-600);line-height:1.3;}
  .mini-bars{display:flex;align-items:flex-end;gap:4px;height:26px;margin-top:8px;}
  .mini-bars i{display:block;width:6px;border-radius:2px;background:rgba(27,95,217,.35);}
  .mini-bars i:last-child{background:var(--brand-600);}

  /* ---------- sections ---------- */
  .section{padding:56px 0;}
  .section-tight{padding:36px 0;}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
  .section-head h2{font-size:30px;line-height:1.25;font-weight:700;letter-spacing:-.2px;}
  .section-head p{margin-top:8px;font-size:14px;color:var(--ink-600);max-width:62ch;}
  .section-head .head-link{font-size:14px;color:var(--brand-600);font-weight:600;}

  /* metrics */
  .metric-strip{
    display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);overflow:hidden;
  }
  .metric{padding:26px 28px;border-right:1px solid var(--divider);}
  .metric:last-child{border-right:0;}
  .metric .m-label{font-size:13px;color:var(--ink-400);}
  .metric .m-value{display:flex;align-items:baseline;gap:6px;margin-top:6px;font-size:34px;font-weight:600;color:var(--brand-600);line-height:1.2;font-variant-numeric:tabular-nums;}
  .metric .m-value span{font-size:14px;font-weight:500;color:var(--ink-600);}
  .metric .m-note{margin-top:8px;font-size:13px;color:var(--ink-600);}
  .m-tag{display:inline-block;margin-top:10px;font-size:12px;color:#B54A1B;background:rgba(255,122,69,.12);border-radius:999px;padding:3px 10px;}

  /* module cards */
  .module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);
    transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
    display:flex;flex-direction:column;overflow:hidden;
  }
  .card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:var(--line-strong);}
  .card:focus-within{border-color:var(--brand-500);box-shadow:var(--s2);}
  .card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;border-bottom:1px solid var(--divider);background:var(--brand-050);}
  .card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .chip{
    display:inline-flex;align-items:center;font-size:12px;color:var(--brand-700);
    background:var(--brand-100);border-radius:999px;padding:4px 10px;width:max-content;
  }
  .card h3{font-size:19px;font-weight:600;line-height:1.4;}
  .card p{font-size:14px;color:var(--ink-600);}
  .card .card-foot{margin-top:auto;padding-top:6px;}
  .icon-badge{
    width:40px;height:40px;border-radius:12px;background:var(--brand-050);color:var(--brand-600);
    display:inline-flex;align-items:center;justify-content:center;font-size:16px;
  }

  /* compare */
  .cmp{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--s1);overflow:hidden;
  }
  .cmp-row{display:grid;grid-template-columns:190px 1fr 1fr;}
  .cmp-row + .cmp-row{border-top:1px solid var(--divider);}
  .cmp-cell{padding:18px 22px;font-size:14px;color:var(--ink-600);border-right:1px solid var(--divider);}
  .cmp-cell:last-child{border-right:0;}
  .cmp-cell.cmp-label{font-weight:600;color:var(--ink-900);background:#FAFBFD;}
  .cmp-row-head .cmp-cell{font-size:14px;font-weight:600;}
  .cmp-row-head .cmp-cell:first-child{color:var(--ink-400);font-weight:500;background:#F5F7FA;}
  .cmp-a{background:#F5F7FA;color:var(--ink-600);}
  .cmp-b{background:var(--brand-600);color:#fff;}
  .cmp-row-head .cmp-b{font-weight:600;}
  .cmp-cell .ok{color:var(--success);margin-right:6px;}
  .cmp-cell .no{color:var(--ink-400);margin-right:6px;}

  /* faq */
  .faq-wrap{max-width:840px;margin:0 auto;display:grid;gap:12px;}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--s1);transition:border-color .2s,box-shadow .2s;}
  .faq-item:hover{border-color:var(--line-strong);}
  .faq-item[open]{box-shadow:var(--s2);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink-900);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:focus-visible{outline:2px solid var(--brand-600);outline-offset:-2px;border-radius:14px;}
  .faq-item summary .plus{
    flex:0 0 auto;width:24px;height:24px;border-radius:999px;border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);font-size:12px;
    transition:transform .2s ease-out,background .2s ease-out;
  }
  .faq-item[open] summary .plus{transform:rotate(45deg);background:var(--brand-050);}
  .faq-answer{padding:0 22px 20px;font-size:15px;color:var(--ink-600);line-height:1.8;}

  /* cta strip */
  .cta-strip{
    border:1px solid var(--brand-500);border-radius:var(--r-lg);background:#fff;
    padding:30px 32px;box-shadow:var(--s1);
    display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:28px;align-items:center;
  }
  .cta-strip h2{font-size:24px;font-weight:700;line-height:1.3;}
  .cta-strip p{margin-top:10px;font-size:14px;color:var(--ink-600);max-width:52ch;}
  .cta-form{display:flex;gap:10px;flex-wrap:wrap;}
  .field{flex:1 1 200px;min-width:0;}
  .field label{display:block;font-size:13px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
  .field input{
    width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
    background:#fff;outline:none;transition:border-color .18s,box-shadow .18s;
  }
  .field input::placeholder{color:var(--ink-400);}
  .field input:focus{border-color:var(--brand-600);box-shadow:0 0 0 2px rgba(27,95,217,.18);}
  .field input:invalid{border-color:var(--danger);}
  .cta-note{margin-top:12px;font-size:12px;color:var(--ink-400);}
  .cta-form .btn{flex:0 0 auto;}

  /* footer */
  .site-footer{background:var(--deep);color:#C7D3E4;padding:64px 0 24px;margin-top:56px;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:32px;}
  .footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:600;margin-bottom:14px;}
  .footer-brand .brand-mark{box-shadow:none;}
  .site-footer p{font-size:14px;line-height:1.85;max-width:36ch;}
  .site-footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px;letter-spacing:.3px;}
  .footer-links{display:grid;gap:10px;}
  .footer-links a{font-size:14px;color:#C7D3E4;transition:color .18s ease-out;}
  .footer-links a:hover{color:#fff;}
  .footer-links a:focus-visible{outline:2px solid var(--brand-500);outline-offset:3px;border-radius:6px;}
  .footer-bottom{
    margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:#9FB0C7;
  }
  .to-top{
    width:40px;height:40px;border-radius:999px;background:var(--brand-600);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;flex:0 0 40px;
    transition:background .18s ease-out,transform .18s ease-out,opacity .25s ease-out;
  }
  .to-top:hover{background:var(--brand-500);transform:translateY(-2px);}
  .to-top:focus-visible{outline:2px solid #fff;outline-offset:3px;}
  #toTop.is-hidden{opacity:0;pointer-events:none;}

  @media (max-width:1200px){
    .nav-menu{gap:18px;}
    .cmd-search{width:200px;}
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
  }
  @media (max-width:1023px){
    .nav-menu,.cmd-search,.header-link{display:none;}
    .nav-toggle{display:inline-flex;}
    .hero-grid{grid-template-columns:1fr;gap:32px;padding:20px 0 32px;}
    .page-title{font-size:34px;}
    .hero-figure{order:-1;}
    .float-card{display:none;}
    .module-grid{grid-template-columns:1fr;}
    .metric-strip{grid-template-columns:1fr;}
    .metric{border-right:0;border-bottom:1px solid var(--divider);}
    .metric:last-child{border-bottom:0;}
    .cmp-row{grid-template-columns:150px 1fr 1fr;}
    .cmp-cell{padding:16px 16px;}
    .cta-strip{grid-template-columns:1fr;padding:26px 24px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  }
  @media (max-width:767px){
    .section{padding:44px 0;}
    .section-head h2{font-size:24px;}
    .cmp-row{grid-template-columns:1fr;}
    .cmp-cell{border-right:0;border-bottom:1px solid var(--divider);}
    .cmp-cell:last-child{border-bottom:0;}
    .cmp-cell.cmp-label{background:#F5F7FA;font-size:13px;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (max-width:520px){
    .page-title{font-size:30px;}
    .hero-lead{font-size:15px;}
    .hero-actions .btn{width:100%;}
    .cta-form .btn{width:100%;}
    .container{padding:0 16px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: category3 */
:root{
  --brand-700:#103E8C;
  --brand-600:#1B5FD9;
  --brand-500:#3B7BEA;
  --brand-100:#E7EFFD;
  --brand-050:#F4F8FF;
  --accent-500:#FF7A45;
  --ink-900:#0F1B2D;
  --ink-600:#4A5B72;
  --ink-400:#8494A9;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --deep:#0E2143;
  --line:#E4EAF3;
  --divider:#EEF2F8;
  --ok:#12B76A;
  --err:#F04438;
  --s1:0 1px 2px rgba(15,27,45,.04);
  --s2:0 6px 20px rgba(15,27,45,.07);
  --s3:0 14px 34px rgba(15,27,45,.10);
  --r-card:16px;
  --r-shell:24px;
  --r-btn:10px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--page);
  color:var(--ink-900);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  padding-top:64px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}

.container{max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1440px){.container{max-width:1320px;}}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.scrolled{box-shadow:var(--s1);}
.header-inner{display:flex;align-items:center;gap:16px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:var(--ink-900);white-space:nowrap;}
.brand-mark{
  width:30px;height:30px;border-radius:8px;
  background:linear-gradient(180deg,var(--brand-600),var(--brand-700));
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-text{letter-spacing:-.2px;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:8px;
  font-size:15px;color:var(--ink-600);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:var(--brand-050);}
.nav-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transition:transform .2s ease-out;
}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:230px;height:38px;padding:0 10px;
  background:#F2F6FC;border:1px solid transparent;border-radius:var(--r-btn);
  transition:background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.command-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:var(--s2);}
.command-search i{color:var(--ink-400);font-size:13px;}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;}
.cmd-kbd{
  font-size:11px;color:var(--ink-400);background:#fff;border:1px solid var(--line);
  border-radius:6px;padding:1px 6px;line-height:1.5;
}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;color:var(--ink-900);
  border:1px solid var(--line);background:#fff;
  transition:background-color .18s ease-out,border-color .18s ease-out;
}
.menu-toggle:hover{background:var(--brand-050);border-color:#C9DBF8;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--s1);}
.btn-primary:hover{background:var(--brand-700);box-shadow:var(--s2);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--s1);}
.btn-primary:disabled{background:rgba(27,95,217,.4);pointer-events:none;box-shadow:none;}
.btn-outline{background:#fff;color:var(--brand-600);border:1px solid var(--line);}
.btn-outline:hover{border-color:var(--brand-500);background:var(--brand-050);}
.btn-outline:active{transform:translateY(1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-600);
}
.link-more i{transition:transform .18s ease-out;}
.link-more:hover i{transform:translateX(2px);}
.link-more:hover{color:var(--brand-700);}
.link-more:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}

/* 移动抽屉 */
.mask{
  position:fixed;inset:0;z-index:55;background:rgba(15,27,45,.42);
  opacity:0;pointer-events:none;transition:opacity .2s ease-out;
}
.mask.open{opacity:1;pointer-events:auto;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:60;
  width:84%;max-width:340px;background:#fff;padding:20px;
  transform:translateX(102%);transition:transform .24s ease-out;
  box-shadow:-10px 0 30px rgba(15,27,45,.14);overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);color:var(--ink-600);}
.drawer-close:hover{background:var(--brand-050);color:var(--ink-900);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;}
.drawer-link{padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-600);border:1px solid transparent;}
.drawer-link:hover{background:var(--brand-050);color:var(--ink-900);}
.drawer-link.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:42px;padding:0 12px;
  background:#F2F6FC;border-radius:10px;margin-bottom:16px;
}
.drawer-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;}
.drawer-cta{width:100%;}

/* ============ 页面头 ============ */
.page-head{
  background:linear-gradient(180deg,var(--brand-050),#fff 78%);
  border-bottom:1px solid var(--divider);
  padding:40px 0 52px;
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:22px;flex-wrap:wrap;}
.crumb a{color:var(--brand-600);}
.crumb a:hover{text-decoration:underline;}
.crumb span{color:var(--ink-600);}
.page-head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.badge{
  display:inline-block;font-size:12px;border-radius:999px;padding:6px 10px;line-height:1.4;
}
.badge-blue{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.badge-orange{background:var(--accent-500);color:#fff;font-weight:600;}
.hd-1{
  font-size:44px;line-height:1.15;letter-spacing:-.5px;font-weight:700;
  margin:16px 0 14px;color:var(--ink-900);
}
.page-head .lead{font-size:17px;color:var(--ink-600);max-width:34em;margin:0 0 22px;}
.anchor-tabs{display:flex;flex-wrap:wrap;gap:10px;}
.anchor-tabs a{
  font-size:14px;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--ink-600);
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.anchor-tabs a:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050);}
.anchor-tabs a:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.head-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:20px;border:1px solid var(--line);box-shadow:var(--s2);
}

/* ============ 通用区块 ============ */
.section{padding:72px 0;}
.section-tight{padding:56px 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;flex-wrap:wrap;}
.hd-2{font-size:30px;line-height:1.25;font-weight:700;margin:0 0 10px;color:var(--ink-900);}
.sec-desc{font-size:15px;color:var(--ink-600);margin:0;max-width:44em;}
.sec-aside{font-size:14px;color:var(--ink-400);}

/* ============ 指标条 ============ */
.metric-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-shell);
  box-shadow:var(--s1);padding:8px 0;
}
.metric-cell{padding:22px 28px;position:relative;}
.metric-cell + .metric-cell::before{
  content:"";position:absolute;left:0;top:18%;bottom:18%;width:1px;background:var(--divider);
}
.metric-name{font-size:13px;color:var(--ink-400);margin:0 0 8px;}
.metric-value{
  font-size:34px;font-weight:600;line-height:1.15;color:var(--brand-600);
  font-variant-numeric:tabular-nums;margin:0;
}
.metric-value small{font-size:14px;font-weight:400;color:var(--ink-600);margin-left:4px;}
.metric-note{font-size:13px;color:var(--ink-600);margin:10px 0 0;}

/* ============ 三列清单卡 ============ */
.list-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.list-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);padding:26px 24px;display:flex;flex-direction:column;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.list-card:hover{box-shadow:var(--s3);transform:translateY(-2px);border-color:#C9DBF8;}
.list-card-head{display:flex;align-items:center;gap:12px;margin-bottom:6px;}
.num{
  width:32px;height:32px;flex:0 0 auto;border-radius:999px;
  background:var(--brand-050);color:var(--brand-600);
  display:grid;place-items:center;font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.hd-3{font-size:18px;font-weight:600;margin:0;color:var(--ink-900);}
.list-card .card-note{font-size:13px;color:var(--ink-400);margin:10px 0 14px;}
.plan-list{list-style:none;margin:0 0 20px;padding:0;}
.plan-list li{
  position:relative;padding-left:16px;margin-bottom:11px;
  font-size:13px;line-height:1.7;color:var(--ink-600);
}
.plan-list li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:999px;
  background:var(--brand-500);
}
.plan-list li strong{color:var(--ink-900);font-weight:600;}
.list-card .link-more{margin-top:auto;}

/* ============ 双栏对照卡 ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.compare-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);overflow:hidden;
  transition:box-shadow .2s ease-out,transform .2s ease-out;
}
.compare-card:hover{box-shadow:var(--s3);transform:translateY(-2px);}
.compare-head{
  padding:16px 24px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.compare-head.grey{background:var(--divider);color:var(--ink-900);}
.compare-head.blue{background:var(--brand-600);color:#fff;}
.compare-head .tag{
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
}
.compare-head.grey .tag{background:#fff;color:var(--ink-600);}
.compare-head.blue .tag{background:rgba(255,255,255,.18);color:#fff;}
.compare-list{list-style:none;margin:0;padding:6px 24px 22px;}
.compare-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--divider);
  font-size:14px;color:var(--ink-600);line-height:1.7;
}
.compare-list li:last-child{border-bottom:0;}
.compare-list li i{color:var(--brand-500);font-size:13px;margin-top:6px;flex:0 0 auto;}
.compare-list li b{display:block;color:var(--ink-900);font-weight:600;font-size:14px;}

/* ============ 折叠说明 ============ */
.faq-wrap{max-width:800px;margin:0 auto;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--s1);transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.faq-item:hover{border-color:#C9DBF8;}
.faq-item[open]{box-shadow:var(--s2);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:focus-visible{outline:2px solid var(--brand-600);outline-offset:-2px;border-radius:14px;}
.faq-icon{
  width:24px;height:24px;flex:0 0 auto;border-radius:999px;
  background:var(--brand-050);color:var(--brand-600);
  display:grid;place-items:center;font-size:14px;line-height:1;
  transition:transform .2s ease-out;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-600);max-width:38em;}

/* ============ 表单块 ============ */
.form-block{
  background:var(--brand-050);border:1px solid var(--line);border-radius:var(--r-shell);
  padding:40px;display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start;
}
.form-block .points{list-style:none;margin:20px 0 0;padding:0;}
.form-block .points li{
  position:relative;padding-left:26px;margin-bottom:12px;font-size:15px;color:var(--ink-600);
}
.form-block .points li i{position:absolute;left:0;top:5px;color:var(--ok);font-size:14px;}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s2);padding:28px;
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  outline:none;font-size:14px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.field textarea{height:auto;min-height:96px;padding:10px 12px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,95,217,.14);
}
.field input:disabled,.field select:disabled{background:#F4F6FA;color:var(--ink-400);}
.checkline{display:flex;align-items:flex-start;gap:10px;font-size:12px;color:var(--ink-400);margin:14px 0 18px;}
.checkline input{width:16px;height:16px;margin-top:3px;flex:0 0 auto;accent-color:var(--brand-600);}
.form-tip{font-size:12px;color:var(--ink-400);margin:12px 0 0;}
.form-msg{
  display:none;margin-top:14px;padding:12px 14px;border-radius:10px;
  background:var(--brand-100);color:var(--brand-700);font-size:13px;
}
.form-msg.show{display:block;}

/* ============ 页脚 ============ */
.site-footer{background:var(--deep);color:#C7D3E4;margin-top:96px;padding:64px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:600;margin-bottom:14px;}
.site-footer p{font-size:14px;line-height:1.8;color:#C7D3E4;margin:0;max-width:34em;}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin:0 0 16px;}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:#C7D3E4;transition:color .18s ease-out;}
.footer-links a:hover{color:#fff;}
.footer-links a:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:20px;
  font-size:13px;color:#8FA3C0;flex-wrap:wrap;
}
.to-top{
  width:40px;height:40px;border-radius:999px;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;opacity:0;pointer-events:none;
  transition:opacity .2s ease-out,background-color .18s ease-out,transform .18s ease-out;
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{background:var(--brand-500);transform:translateY(-2px);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-menu,.command-search,.header-actions .btn-ghost{display:none;}
  .menu-toggle{display:grid;place-items:center;}
  .page-head-grid{grid-template-columns:1fr;gap:26px;}
  .head-media{order:-1;}
  .head-media img{max-height:280px;}
  .list-cards{grid-template-columns:repeat(2,1fr);}
  .form-block{grid-template-columns:1fr;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{padding-top:56px;}
  .header-inner{height:56px;}
  .hd-1{font-size:30px;}
  .hd-2{font-size:24px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .page-head{padding:28px 0 40px;}
  .metric-strip{grid-template-columns:1fr 1fr;}
  .metric-cell{padding:18px 20px;}
  .metric-cell:nth-child(3)::before{display:none;}
  .metric-cell:nth-child(3){grid-column:1 / -1;}
  .metric-value{font-size:28px;}
  .list-cards{grid-template-columns:1fr;}
  .compare-grid{grid-template-columns:1fr;}
  .form-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{margin-top:56px;padding:48px 0 20px;}
}
@media (max-width:520px){
  .metric-strip{grid-template-columns:1fr;}
  .metric-cell + .metric-cell::before{display:none;}
  .metric-cell + .metric-cell{border-top:1px solid var(--divider);}
  .hd-1{font-size:26px;}
  .anchor-tabs a{font-size:13px;padding:7px 12px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}