/* roulang page: index */
:root{
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E2E9F4;
  --brand:#1E56D6;
  --brand-deep:#123A9C;
  --brand-soft:#E8EFFD;
  --accent:#FF7A2F;
  --accent-deep:#C4520D;
  --ok:#00A98F;
  --ink:#0F1E3D;
  --text:#1B2740;
  --muted:#5C6B85;
  --faint:#8A97AC;
  --warn:#D98A00;
  --err:#D64545;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:18px;
  --sh-low:0 1px 2px rgba(15,30,61,.05);
  --sh-mid:0 10px 28px -14px rgba(15,30,61,.18);
  --sh-high:0 16px 40px -20px rgba(15,30,61,.28);
  --side:256px;
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover,a:focus{color:var(--brand-deep);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.3;font-weight:600;letter-spacing:-.01em;}
h1{font-size:44px;}
h2{font-size:29px;}
h3{font-size:21px;}
h4{font-size:17px;}
p{margin:0 0 18px;max-width:40em;}
ul,ol{margin:0;padding:0;list-style:none;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text);}
::selection{background:var(--brand-soft);color:var(--brand-deep);}
.grid-container{max-width:1200px;}
.grid-container-fluid{max-width:100%;}
/* ---------- layout ---------- */
.page-shell{padding-bottom:0;}
.side-nav{display:none;}
.mobile-bar{display:none;}
/* ---------- sidebar ---------- */
.brand-block{display:flex;gap:12px;align-items:flex-start;padding:4px 6px 18px;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  position:relative;box-shadow:var(--sh-low);
}
.brand-mark::after{
  content:"";position:absolute;inset:0;margin:auto;width:14px;height:14px;
  background:#fff;transform:rotate(45deg);border-radius:3px;
}
.brand-name{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.4;}
.brand-sub{font-size:12.5px;color:var(--faint);line-height:1.6;margin-top:2px;}
.nav-list{display:flex;flex-direction:column;gap:6px;margin-top:4px;}
.nav-list a{
  position:relative;display:flex;align-items:center;
  min-height:44px;padding:0 14px;border-radius:10px;
  font-size:15px;color:var(--muted);font-weight:500;
}
.nav-list a:hover{background:var(--brand-soft);color:var(--brand-deep);}
.nav-list a.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;}
.nav-list a.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--accent);
}
.side-divider{height:1px;background:var(--line);margin:22px 6px;}
.side-cta{display:flex;flex-direction:column;gap:10px;padding:0 6px;}
.side-trust{margin-top:auto;padding:18px 6px 4px;border-top:1px solid var(--line);}
.side-trust li{font-size:12.5px;color:var(--muted);display:flex;gap:8px;align-items:center;padding:4px 0;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);flex:0 0 6px;}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease);
  text-align:center;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-low);}
.btn-primary:hover{background:#1a4cc0;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-mid);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-low);background:var(--brand-deep);}
.btn-ghost{background:var(--surface);color:var(--brand);border-color:var(--line);}
.btn-ghost:hover{background:var(--brand-soft);border-color:rgba(30,86,214,.4);color:var(--brand-deep);}
.btn-block{width:100%;}
.btn-sm{min-height:40px;padding:0 18px;font-size:14.5px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.link-text{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);
  border-bottom:2px solid transparent;padding-bottom:2px;
}
.link-text:hover{color:var(--brand-deep);border-bottom-color:var(--accent);}
/* ---------- hero ---------- */
.hero{padding:56px 0 20px;}
.hero__grid{align-items:center;}
.hero__copy .brand-line{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-deep);
  background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:18px;
}
.hero h1{font-size:42px;margin-bottom:16px;max-width:14em;}
.hero h1 em{font-style:normal;position:relative;color:var(--brand-deep);}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:7px;border-radius:4px;
  background:rgba(255,122,47,.28);z-index:-1;
}
.hero__sub{font-size:17px;color:var(--muted);max-width:30em;margin-bottom:26px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px;}
.hero__trust{font-size:12.5px;color:var(--faint);display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;}
.hero__media{position:relative;margin-top:26px;}
.hero__figure{
  position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-mid);background:var(--brand-soft);
}
.hero__figure img{width:100%;height:360px;object-fit:cover;}
.hero__figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(244,247,252,.72),rgba(244,247,252,0) 62%);
}
.hero__float{
  position:absolute;left:-14px;bottom:-18px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-high);padding:14px 18px;min-width:190px;
}
.hero__float span{display:block;font-size:12px;color:var(--faint);}
.hero__float strong{font-size:26px;color:var(--ink);font-variant-numeric:tabular-nums;font-weight:700;}
/* ---------- section base ---------- */
.section{padding:84px 0;}
.section--tight{padding:64px 0;}
.section--soft{background:var(--brand-soft);}
.section--plain{background:transparent;}
.section-head{max-width:44em;margin-bottom:38px;}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:16px;margin:0;}
.section-head--row{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;max-width:none;}
/* ---------- pain list ---------- */
.pain-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 40px;}
.pain-item{display:flex;gap:14px;padding-left:2px;}
.pain-item .num{
  flex:0 0 34px;height:34px;border-radius:9px;background:var(--surface);border:1px solid var(--line);
  color:var(--brand-deep);font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.pain-item p{margin:2px 0 0;font-size:16px;color:var(--text);border-left:3px solid var(--accent);padding-left:14px;}
/* ---------- plan cards ---------- */
.plan-grid{--gap:20px;}
.plan-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-low);padding:26px;height:100%;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.plan-card:hover{transform:translateY(-2px);box-shadow:var(--sh-mid);border-color:rgba(30,86,214,.28);}
.plan-card + .plan-card{margin-top:20px;}
.plan-card__icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.plan-card__icon svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.plan-card h3{font-size:20px;margin-bottom:10px;}
.plan-card p{color:var(--muted);font-size:15px;margin-bottom:16px;}
.plan-points li{
  font-size:15px;color:var(--text);padding-left:22px;position:relative;margin-bottom:8px;line-height:1.7;
}
.plan-points li::before{
  content:"";position:absolute;left:4px;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--accent);transform:rotate(45deg);
}
.plan-card__foot{margin-top:18px;}
.plan-card--wide .plan-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 24px;}
/* ---------- entry cards ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.entry-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh-low);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--sh-mid);border-color:rgba(30,86,214,.28);}
.entry-card__img{aspect-ratio:16/10;background:var(--brand-soft);overflow:hidden;}
.entry-card__img img{width:100%;height:100%;object-fit:cover;}
.entry-card__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.entry-card h3{font-size:19px;margin:0;}
.entry-card p{font-size:14.5px;color:var(--muted);margin:0;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-deep);}
.badge-ok{background:rgba(0,169,143,.1);color:var(--ok);}
.badge-accent{background:rgba(255,122,47,.12);color:var(--accent-deep);}
/* ---------- stats ---------- */
.stat-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-low);padding:8px 0;
}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.stat-item{padding:26px 22px;border-left:1px solid var(--line);}
.stat-item:first-child{border-left:none;}
.stat-item strong{
  display:block;font-size:40px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;line-height:1.15;
}
.stat-item strong span{font-size:16px;color:var(--muted);font-weight:600;margin-left:4px;}
.stat-item em{display:block;font-style:normal;font-size:14px;color:var(--text);margin-top:6px;font-weight:600;}
.stat-item i{display:block;font-style:normal;font-size:12.5px;color:var(--faint);margin-top:2px;}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-low);overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-mid);border-color:rgba(30,86,214,.28);}
.news-card__img{aspect-ratio:16/10;background:var(--brand-soft);overflow:hidden;}
.news-card__img img{width:100%;height:100%;object-fit:cover;}
.news-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card h3{font-size:17.5px;line-height:1.5;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card h3 a{color:var(--ink);}
.news-card h3 a:hover{color:var(--brand-deep);}
.news-card__sum{
  font-size:14.5px;color:var(--muted);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12.5px;color:var(--faint);margin-top:auto;}
.meta-row .sep{color:var(--line);}
.empty-state{
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
  min-height:180px;max-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;text-align:center;padding:26px;
}
.empty-state svg{width:52px;height:52px;stroke:var(--faint);fill:none;stroke-width:1.4;stroke-linecap:round;}
.empty-state p{margin:0;color:var(--muted);font-size:15px;}
/* ---------- faq ---------- */
.faq-accordion{display:flex;flex-direction:column;gap:12px;background:transparent;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--sh-low);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;position:relative;
  font-size:17px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:12px;min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";margin-left:auto;width:9px;height:9px;flex:0 0 9px;
  border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);
  transform:rotate(45deg);transition:transform var(--ease);
}
.faq-item[open] summary{color:var(--brand-deep);}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--accent);
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item .faq-body{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.85;}
.faq-item .faq-body p{margin:0;max-width:56em;}
/* ---------- cta ---------- */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-mid);padding:30px 32px;
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{margin:0;color:var(--muted);font-size:15px;max-width:34em;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
/* ---------- privacy note ---------- */
.privacy-note{
  font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;
  border-top:1px solid var(--line);padding-top:20px;margin-top:8px;
}
.privacy-note a{color:var(--brand);font-weight:600;}
/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#B9C6DC;margin-top:20px;}
.site-footer .grid-container{padding-top:56px;padding-bottom:0;}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px;}
.footer-brand{display:flex;gap:12px;align-items:flex-start;}
.footer-brand .brand-name{color:#fff;font-size:16px;}
.footer-brand .brand-sub{color:#8A97AC;}
.footer-brand p{font-size:13.5px;color:#93A2BB;margin:14px 0 0;max-width:26em;line-height:1.8;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:#B9C6DC;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  padding:18px 0 22px;font-size:12.5px;color:#8A97AC;
}
.footer-bottom a{color:#B9C6DC;}
.footer-bottom a:hover{color:#fff;}
/* ---------- modal ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(15,30,61,.45);z-index:1100;display:none;
}
body.modal-open .modal-mask{display:block;}
.lead-modal.reveal{
  display:none;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);
  width:min(620px,92vw);max-height:88vh;overflow:auto;margin:0;padding:0;border:none;
  background:var(--surface);border-radius:var(--r-modal);box-shadow:var(--sh-high);z-index:1200;outline:none;
}
.lead-modal.reveal.is-open{display:block;}
.lead-modal__inner{padding:28px 30px 26px;position:relative;}
.lead-modal__inner h2{font-size:22px;margin-bottom:8px;padding-right:40px;}
.lead-modal__inner > p{margin:0 0 20px;color:var(--muted);font-size:14.5px;}
.lead-modal__close{
  position:absolute;top:16px;right:16px;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:22px;line-height:1;
  cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color var(--ease),color var(--ease);
}
.lead-modal__close:hover{background:var(--brand-soft);color:var(--brand-deep);}
/* ---------- form ---------- */
.lead-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field--full{grid-column:1 / -1;}
.field label{font-size:13.5px;font-weight:600;color:var(--ink);}
.field label .req{color:var(--err);margin-left:2px;}
.field input,.field select,.field textarea{
  min-height:46px;border:1px solid var(--line);border-radius:10px;background:#fff;
  padding:10px 14px;transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.field .hint{font-size:12px;color:var(--faint);}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);grid-column:1 / -1;}
.check-row input{width:18px;height:18px;min-height:18px;margin-top:4px;flex:0 0 18px;accent-color:var(--brand);}
.check-row a{color:var(--brand);font-weight:600;}
.form-actions{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.form-privacy{font-size:12.5px;color:var(--muted);margin:16px 0 0;line-height:1.7;}
.form-privacy a{color:var(--brand);font-weight:600;}
/* ---------- mobile bar & drawer ---------- */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:0 16px;z-index:900;box-shadow:var(--sh-low);
}
.mobile-bar .brand-name{font-size:15px;}
.hamburger{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);background:#fff;z-index:1000;
  transform:translateX(102%);transition:transform 240ms ease-out;box-shadow:var(--sh-high);
  display:flex;flex-direction:column;padding:18px 18px 24px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:20px;}
.drawer__card{
  border:1px solid var(--line);border-radius:12px;padding:14px;min-height:88px;background:var(--surface);
  display:flex;flex-direction:column;gap:6px;transition:background-color var(--ease),border-color var(--ease);
}
.drawer__card strong{font-size:14.5px;color:var(--ink);font-weight:600;}
.drawer__card span{font-size:12px;color:var(--faint);line-height:1.6;}
.drawer__card:hover{background:var(--brand-soft);border-color:rgba(30,86,214,.3);}
body.drawer-open{overflow:hidden;}
/* ---------- responsive ---------- */
@media (min-width:1025px){
  .side-nav{
    display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;width:var(--side);
    background:#fff;border-right:1px solid var(--line);padding:22px 16px 24px;overflow-y:auto;z-index:80;
  }
  .page-shell{margin-left:var(--side);}
  .mobile-bar,.drawer{display:none;}
}
@media (max-width:1024px){
  .page-shell{padding-top:60px;}
  h1{font-size:34px;}
  .hero h1{font-size:34px;}
  h2{font-size:24px;}
  .section{padding:64px 0;}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-item:nth-child(3){border-left:none;}
  .stat-item{border-top:1px solid var(--line);}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-top:none;}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero__figure img{height:300px;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  h1{font-size:28px;}
  .hero h1{font-size:29px;}
  h2{font-size:22px;}
  .section{padding:48px 0;}
  .section--tight{padding:44px 0;}
  .pain-list{grid-template-columns:minmax(0,1fr);}
  .entry-grid,.news-grid,.stat-grid{grid-template-columns:minmax(0,1fr);}
  .stat-item{border-left:none;border-top:1px solid var(--line);}
  .stat-item:nth-child(2){border-top:1px solid var(--line);}
  .plan-card--wide .plan-points{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:24px 20px;}
  .cta-actions .btn{width:100%;}
  .lead-form{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px;}
  .hero__figure img{height:220px;}
  .hero__float{left:8px;bottom:-14px;padding:12px 14px;min-width:160px;}
  .hero__float strong{font-size:22px;}
  .drawer__grid{grid-template-columns:minmax(0,1fr);}
  .btn{min-height:46px;}
}

/* roulang page: article */
:root{
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E2E9F4;
  --brand:#1E56D6;
  --brand-deep:#123A9C;
  --brand-soft:#E8EFFD;
  --accent:#FF7A2F;
  --ok:#00A98F;
  --ink:#0F1E3D;
  --text:#1B2740;
  --muted:#5C6B85;
  --faint:#8A97AC;
  --warn:#D98A00;
  --err:#D64545;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,30,61,.05);
  --sh-2:0 10px 28px -14px rgba(15,30,61,.18);
  --sh-3:0 16px 40px -20px rgba(15,30,61,.28);
  --rail-w:256px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease}
a:visited{color:var(--brand)}
a:hover{color:var(--brand-deep)}
button{font:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;line-height:1.32}
p{margin:0}
ul,ol{margin:0}
input,select,textarea{font:inherit;color:var(--text)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:400;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 10px 0}
.skip-link:focus{left:0;color:#fff}

/* ---------- container ---------- */
.grid-container{max-width:1240px;padding-left:40px;padding-right:40px}

/* ---------- brand ---------- */
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--brand);
  position:relative;flex:0 0 36px;
}
.brand-mark::after{
  content:"";position:absolute;inset:0;margin:auto;width:12px;height:12px;
  background:#fff;border-radius:2px;transform:rotate(45deg);
}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-name{font-size:16px;font-weight:700;color:var(--ink);line-height:1.3;letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--muted);line-height:1.4;margin-top:2px}

/* ---------- shell ---------- */
.page-wrap{margin-left:var(--rail-w);min-height:100vh;display:flex;flex-direction:column}
.site-main{flex:1 0 auto}

/* ---------- sidebar ---------- */
.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:22px 16px 20px;
  display:flex;flex-direction:column;gap:20px;
  z-index:80;
}
.rail-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.rail-body{display:flex;flex-direction:column;flex:1 1 auto;min-height:0;gap:16px}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-list a{
  position:relative;display:flex;align-items:center;min-height:44px;
  padding:8px 12px 8px 14px;border-radius:var(--r-btn);
  color:var(--muted);font-size:15px;line-height:1.4;
}
.nav-list a:hover{background:var(--brand-soft);color:var(--brand-deep)}
.nav-list a.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.nav-list a.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--accent);
}
.rail-divider{height:1px;background:var(--line);margin:0 4px}
.rail-cta{width:100%}
.rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding-top:14px;border-top:1px solid var(--line)}
.rail-foot span{position:relative;padding-left:14px;font-size:12.5px;color:var(--faint);line-height:1.6}
.rail-foot span::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--ok);
}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transform:translateX(-50%);content:"";
}
.nav-toggle span{top:21px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:visited{color:#fff}
.btn-primary:hover{background:#1b4dc2;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn-ghost:hover{border-color:rgba(30,86,214,.4);background:var(--brand-soft);color:var(--brand-deep)}
.btn[disabled]{opacity:.4;pointer-events:none}
.link-more{font-size:14px;font-weight:600;padding-bottom:3px;border-bottom:2px solid var(--brand-soft);transition:border-color .18s ease,color .18s ease}
.link-more:hover{border-color:var(--accent);color:var(--brand-deep)}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;line-height:1;white-space:nowrap;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-deep)}
.badge-ok{background:rgba(0,169,143,.1);color:var(--ok)}
.badge-accent{background:rgba(255,122,47,.12);color:#C1510E}

/* ---------- article head ---------- */
.article-section{padding:30px 0 0}
.breadcrumb{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--faint);
  white-space:nowrap;overflow-x:auto;padding-bottom:2px;
}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C3CCDC}
.breadcrumb .current{color:var(--text);max-width:46vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:42px;line-height:1.28;font-weight:700;letter-spacing:-.3px;
  margin:18px 0 18px;max-width:900px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px 16px;
  font-size:13px;color:var(--faint);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:#C3CCDC}
.article-rule{height:1px;background:var(--line);margin:26px 0 34px}

/* ---------- article layout ---------- */
.article-layout{display:flex;align-items:flex-start;justify-content:center;gap:48px}
.article-main{flex:1 1 auto;min-width:0;max-width:760px}
.article-aside{display:none;flex:0 0 236px;width:236px;position:sticky;top:32px}
.toc-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px 18px 20px;box-shadow:var(--sh-1)}
.toc-card h2{font-size:15px;margin-bottom:12px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.55;color:var(--muted);
  padding:6px 0 6px 12px;border-left:2px solid var(--line);
}
.toc-list a:hover{color:var(--brand-deep);border-left-color:var(--accent);background:var(--brand-soft)}

/* ---------- entry ---------- */
.entry{font-size:16px;line-height:1.85;color:var(--text);overflow-wrap:break-word}
.entry p{margin:0 0 20px}
.entry h2{
  position:relative;font-size:26px;line-height:1.36;margin:40px 0 16px;
  padding-left:14px;color:var(--ink);scroll-margin-top:90px;
}
.entry h2::before{
  content:"";position:absolute;left:0;top:.46em;width:3px;height:18px;
  border-radius:2px;background:var(--accent);
}
.entry h3{font-size:20px;line-height:1.4;margin:28px 0 12px;color:var(--ink);scroll-margin-top:90px}
.entry h4{font-size:17px;margin:22px 0 10px;color:var(--ink)}
.entry ul,.entry ol{margin:0 0 20px;padding-left:22px}
.entry li{margin-bottom:8px;line-height:1.8}
.entry blockquote{
  margin:24px 0;padding:16px 20px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;color:var(--text);
}
.entry blockquote p:last-child{margin-bottom:0}
.entry img{border-radius:12px;margin:22px 0;box-shadow:var(--sh-1)}
.entry a{text-decoration:underline;text-underline-offset:4px}
.entry a:hover{color:var(--brand-deep)}
.entry strong{color:var(--ink)}
.entry hr{border:0;height:1px;background:var(--line);margin:34px 0}
.entry code{background:#EEF3FB;border-radius:6px;padding:2px 6px;font-size:14px}
.entry table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;margin:0 0 22px}
.entry th,.entry td{border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap}
.entry th{background:#F7FAFE;color:var(--ink);font-weight:600}

/* ---------- empty state ---------- */
.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px 24px;text-align:center;max-height:220px;box-shadow:var(--sh-1);
}
.empty-art{
  width:56px;height:40px;margin:0 auto 14px;border-radius:8px;
  border:2px solid var(--line);position:relative;
}
.empty-art::after{
  content:"";position:absolute;left:50%;top:50%;width:22px;height:2px;
  background:var(--line);transform:translate(-50%,-50%);
}
.empty-state p{color:var(--muted);margin-bottom:16px;font-size:15px}

/* ---------- post nav ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:44px}
.post-nav-item{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.post-nav-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(30,86,214,.28)}
.pn-label{font-size:12px;color:var(--faint)}
.pn-title{font-size:15.5px;font-weight:600;color:var(--ink);line-height:1.5}

/* ---------- cta band ---------- */
.cta-band-section{padding:70px 0 0}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:32px 36px;box-shadow:var(--sh-2);
}
.cta-band h2{font-size:24px;margin-bottom:8px}
.cta-band p{font-size:14.5px;color:var(--muted);max-width:560px}

/* ---------- related ---------- */
.related-section{padding:70px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{font-size:26px}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px}
.related-grid{margin-left:-12px;margin-right:-12px}
.related-grid>.cell{padding-left:12px;padding-right:12px}
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);height:100%;
  display:flex;flex-direction:column;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(30,86,214,.28)}
.rel-cover{display:block;aspect-ratio:16/10;background:#EAF0FA;overflow:hidden}
.rel-cover img{width:100%;height:100%;object-fit:cover}
.rel-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rel-body h3{font-size:17px;line-height:1.5}
.rel-body h3 a{color:var(--ink)}
.rel-body h3 a:hover{color:var(--brand)}
.rel-body p{font-size:14px;color:var(--muted);line-height:1.7}
.rel-card .badge{align-self:flex-start}

/* ---------- privacy line ---------- */
.privacy-line{font-size:13px;color:var(--muted);line-height:1.7;margin-top:28px}
.privacy-line a{text-decoration:underline;text-underline-offset:3px}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:76px;padding:56px 0 24px;flex:0 0 auto}
.footer-top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:34px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.site-footer .footer-top>div>p{font-size:14px;color:var(--muted);line-height:1.75;max-width:360px}
.footer-col h4{font-size:15px;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:40px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:12.5px;color:var(--faint);
}

/* ---------- modal ---------- */
.modal-mask{
  display:none;position:fixed;inset:0;z-index:200;
  background:rgba(15,30,61,.45);padding:24px;overflow-y:auto;
}
.modal-mask.is-open{display:flex;align-items:flex-start;justify-content:center}
.modal-panel{
  position:relative;background:#fff;border-radius:18px;box-shadow:var(--sh-3);
  width:100%;max-width:600px;margin:auto;padding:30px 32px 28px;
}
.modal-panel h2{font-size:22px;margin-bottom:8px}
.modal-panel .modal-lead{font-size:14px;color:var(--muted);margin-bottom:22px}
.modal-close{
  position:absolute;top:14px;right:14px;width:40px;height:40px;border-radius:var(--r-btn);
  color:var(--muted);font-size:22px;line-height:1;
}
.modal-close:hover{background:var(--brand-soft);color:var(--brand-deep)}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:16px 18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1 / -1}
.field label{font-size:13.5px;color:var(--ink);font-weight:600}
.field .req{color:var(--err)}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:10px 14px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-btn);font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.field.has-error input,.field.has-error select{border-color:var(--err)}
.field-error{font-size:12px;color:var(--err);line-height:1.5}
.check-row{display:flex;align-items:flex-start;gap:10px}
.check-row input{width:18px;height:18px;min-height:18px;margin-top:3px;accent-color:var(--brand)}
.check-row label{font-size:13px;font-weight:400;color:var(--muted);line-height:1.65}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form-success{
  grid-column:1 / -1;background:rgba(0,169,143,.1);color:#00775F;
  border-radius:var(--r-btn);padding:12px 16px;font-size:14px;
}
.modal-panel .privacy-line{margin-top:18px}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-container{padding-left:28px;padding-right:28px}
  .site-header{
    position:sticky;top:0;left:auto;bottom:auto;width:100%;height:60px;
    flex-direction:row;align-items:center;justify-content:space-between;
    padding:0 20px;border-right:0;border-bottom:1px solid var(--line);
    box-shadow:0 1px 2px rgba(15,30,61,.04);
  }
  .rail-top{flex:1 1 auto;min-width:0}
  .nav-toggle{display:block;flex:0 0 44px}
  .rail-body{
    position:fixed;top:60px;right:0;bottom:0;width:min(88vw,360px);
    background:#fff;border-left:1px solid var(--line);box-shadow:var(--sh-3);
    padding:22px 20px;overflow-y:auto;z-index:90;
    transform:translateX(103%);transition:transform .28s ease;
  }
  .site-header.nav-open .rail-body{transform:translateX(0)}
  .nav-list a{min-height:46px;font-size:15.5px}
  .rail-cta{width:100%}
  .page-wrap{margin-left:0}
  .article-title{font-size:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 26px}
  .cta-band .btn{width:100%}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .article-title{font-size:29px;margin:16px 0 14px}
  .entry h2{font-size:22px;margin:34px 0 14px}
  .entry h3{font-size:19px}
  .post-nav{grid-template-columns:1fr;gap:14px}
  .lead-form{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:640px){
  .grid-container{padding-left:20px;padding-right:20px}
  .article-title{font-size:28px}
  .article-meta{font-size:12.5px}
  .cta-band-section,.related-section{padding-top:52px}
  .cta-band{padding:24px 20px}
  .modal-panel{padding:24px 20px}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .site-footer{margin-top:56px;padding-top:44px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (min-width:1400px){
  .article-aside{display:block}
}

/* roulang page: category1 */
/* ============================================================
   设计变量
============================================================ */
:root{
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E2E9F4;
  --brand:#1E56D6;
  --brand-deep:#123A9C;
  --brand-soft:#E8EFFD;
  --accent:#FF7A2F;
  --ok:#00A98F;
  --warn:#D98A00;
  --err:#D64545;
  --ink:#0F1E3D;
  --text:#1B2740;
  --muted:#5C6B85;
  --faint:#8A97AC;

  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-modal:18px;

  --sh-1:0 1px 2px rgba(15,30,61,.05);
  --sh-2:0 10px 28px -14px rgba(15,30,61,.18);
  --sh-3:0 16px 40px -20px rgba(15,30,61,.28);

  --sidebar-w:256px;
  --gap-s:12px;
  --gap-m:16px;
  --gap-l:24px;
  --gap-xl:32px;
}

/* ============================================================
   基础 reset
============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
figure{margin:0;}
a{color:var(--brand);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.32;letter-spacing:.2px;}
h1{font-size:clamp(28px,3.2vw,44px);line-height:1.28;}
h2{font-size:clamp(22px,2.3vw,30px);}
h3{font-size:19px;}
h4{font-size:15px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

/* ============================================================
   Foundation 覆盖
============================================================ */
.grid-container{max-width:1240px;padding-left:40px;padding-right:40px;margin-left:auto;margin-right:auto;}
.grid-x{margin-left:0;margin-right:0;}
.button,.callout{all:unset;}
body .grid-container a{color:var(--brand);}
body .grid-container a.btn-primary{color:#fff;}

/* ============================================================
   左侧栏 · 品牌
============================================================ */
.mobile-bar{display:none;}
.sidebar-scrim{
  position:fixed;inset:0;background:rgba(15,30,61,.45);
  opacity:0;visibility:hidden;transition:opacity .24s ease;z-index:55;
}
.sidebar-scrim.is-open{opacity:1;visibility:visible;}

.sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:24px 16px 22px;overflow-y:auto;z-index:60;
}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:10px;}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;position:relative;
  background:linear-gradient(135deg,#2A63E0 0%,#123A9C 100%);
  box-shadow:0 4px 12px -6px rgba(18,58,156,.55);
}
.brand-mark::after{
  content:"";position:absolute;left:50%;top:50%;width:11px;height:11px;
  margin:-5.5px 0 0 -5.5px;border:2px solid #fff;border-radius:2px;transform:rotate(45deg);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-text strong{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-text small{font-size:12px;color:var(--faint);white-space:nowrap;}

.drawer-close{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;border-radius:10px;
  font-size:20px;line-height:1;color:var(--muted);cursor:pointer;
}
.drawer-close:hover{background:var(--brand-soft);color:var(--brand-deep);}

.nav-list{display:grid;gap:6px;margin-top:26px;}
.nav-list a{
  position:relative;display:flex;align-items:center;height:44px;padding:0 14px;
  border-radius:10px;color:var(--muted);font-size:15px;font-weight:500;
  transition:background .18s ease,color .18s ease;
}
.nav-list a:hover{background:var(--brand-soft);color:var(--brand-deep);}
.nav-list a.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;}
.nav-list a.is-active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
}

.sidebar-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);}
.trust-list{margin-top:16px;display:grid;gap:10px;}
.trust-list li{position:relative;padding-left:16px;font-size:12.5px;line-height:1.62;color:var(--faint);}
.trust-list li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--ok);
}

/* ============================================================
   主体外壳
============================================================ */
.shell{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
main{flex:1 0 auto;}

/* ============================================================
   按钮
============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;cursor:pointer;
  border:1px solid transparent;text-decoration:none;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,
             border-color .16s ease,color .16s ease,opacity .16s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:#1A4CC0;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{background:var(--brand-deep);transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);border-color:rgba(30,86,214,.4);color:var(--brand-deep);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand);border-bottom:2px solid rgba(30,86,214,.35);padding-bottom:2px;
  transition:color .16s ease,border-color .16s ease;
}
.text-link:hover{color:var(--brand-deep);border-bottom-color:var(--accent);}
.text-link i{font-size:12px;}

/* ============================================================
   徽章
============================================================ */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.2px;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-deep);}
.badge-ok{background:rgba(0,169,143,.1);color:#007D6A;}
.badge-accent{background:rgba(255,122,47,.12);color:#C2511A;}

/* ============================================================
   卡片
============================================================ */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(30,86,214,.28);}

/* ============================================================
   页头
============================================================ */
.page-head{
  position:relative;overflow:hidden;
  padding:44px 0 46px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(90deg,#F4F7FC 0%,rgba(244,247,252,.93) 44%,rgba(244,247,252,.72) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover,cover;
  background-position:center,center right;
  background-repeat:no-repeat,no-repeat;
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--faint);flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;}
.crumb a{color:var(--faint);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#B9C4D6;}
.crumb .cur{color:var(--text);font-weight:500;}
.page-head h1{margin-top:14px;max-width:24ch;}
.page-head .lead{margin-top:16px;font-size:17px;color:var(--muted);max-width:38em;line-height:1.8;}
.badge-row{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;}

/* ============================================================
   板块
============================================================ */
.section{padding:72px 0;}
.section-tint{
  background-color:#EFF4FD;
  background-image:repeating-linear-gradient(-45deg,rgba(30,86,214,.045) 0 1px,transparent 1px 11px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.sec-head{max-width:56em;margin-bottom:34px;}
.sec-head h2{max-width:24ch;}
.sec-head p{margin-top:12px;color:var(--muted);font-size:16px;max-width:42em;}

/* ============================================================
   左文右图
============================================================ */
.split{align-items:flex-start;}
.split .sticky-col{position:sticky;top:24px;display:flex;flex-direction:column;gap:var(--gap-m);}
.media-card{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:#E9F0FB;box-shadow:var(--sh-1);
}
.media-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.media-caption{
  padding:12px 16px;font-size:12.5px;color:var(--faint);background:#fff;
  border-top:1px solid var(--line);
}
.metric-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--sh-1);
}
.metric-card h3{display:flex;align-items:center;gap:9px;font-size:16px;}
.metric-card h3::before{
  content:"";width:8px;height:8px;flex:0 0 8px;border-radius:2px;
  background:var(--accent);transform:rotate(45deg);
}
.metric-card p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.75;}

.body-copy{margin-top:18px;font-size:16px;color:var(--text);max-width:40em;}
.body-copy + .body-copy{margin-top:14px;}

.point-list{margin-top:26px;display:grid;gap:12px;max-width:44em;}
.point-list li{
  position:relative;padding:13px 18px 13px 46px;background:#fff;
  border:1px solid var(--line);border-radius:12px;font-size:15px;color:var(--text);
  box-shadow:var(--sh-1);transition:border-color .18s ease,box-shadow .18s ease;
}
.point-list li:hover{border-color:rgba(30,86,214,.28);box-shadow:var(--sh-2);}
.point-list li::before{
  content:"";position:absolute;left:18px;top:50%;width:14px;height:14px;margin-top:-7px;
  border-radius:50%;background:var(--brand-soft);
}
.point-list li::after{
  content:"";position:absolute;left:22px;top:50%;width:5px;height:9px;margin-top:-7px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(45deg);
}

/* ============================================================
   观赛链路时间线
============================================================ */
.timeline{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-l);}
.timeline::before{
  content:"";position:absolute;left:6px;right:6px;top:26px;height:1px;background:var(--line);
}
.tl-item{position:relative;padding-top:64px;}
.tl-num{
  position:absolute;top:0;left:0;width:52px;height:52px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
}
.tl-item h3{font-size:18px;}
.tl-item p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.78;max-width:30em;}

/* ============================================================
   不对称卡片区
============================================================ */
.asym{display:grid;grid-template-columns:7fr 5fr;gap:var(--gap-l);align-items:stretch;}
.asym-side{display:grid;gap:var(--gap-l);}
.feature-card{overflow:hidden;display:flex;flex-direction:column;}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#E9F0FB;}
.fc-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.fc-body h3{font-size:21px;}
.fc-body p{font-size:15px;color:var(--muted);line-height:1.78;}
.side-card{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;}
.side-card h3{font-size:17px;}
.side-card p{font-size:14.5px;color:var(--muted);line-height:1.75;}
.side-card .text-link{margin-top:auto;}

/* ============================================================
   数据带
============================================================ */
.data-band{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-1);display:grid;grid-template-columns:repeat(3,1fr);overflow:hidden;
}
.data-cell{padding:30px 26px;position:relative;}
.data-cell + .data-cell{border-left:1px solid var(--line);}
.data-label{font-size:13px;color:var(--faint);letter-spacing:.4px;}
.data-value{
  margin-top:10px;font-size:22px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:.3px;
}
.data-note{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7;}

/* ============================================================
   FAQ
============================================================ */
.faq{display:grid;gap:12px;max-width:900px;}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:0 20px;box-shadow:var(--sh-1);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq details:hover{box-shadow:var(--sh-2);}
.faq details[open]{border-color:rgba(30,86,214,.28);}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:44px;padding:18px 0;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .16s ease;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--muted);
  transition:color .16s ease,transform .2s ease;flex:0 0 auto;
}
.faq details[open] summary{color:var(--brand-deep);}
.faq details[open] summary::after{content:"−";color:var(--brand);}
.faq .faq-body{
  padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--muted);max-width:46em;
}

/* ============================================================
   横向 CTA 带
============================================================ */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:32px 36px;box-shadow:var(--sh-2);
}
.cta-band h2{font-size:22px;max-width:20ch;}
.cta-band p{margin-top:8px;font-size:15px;color:var(--muted);max-width:36em;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

/* ============================================================
   隐私说明
============================================================ */
.privacy-note{padding:0 0 64px;}
.privacy-note p{font-size:13px;color:var(--muted);max-width:52em;line-height:1.75;}
.privacy-note a{color:var(--brand);border-bottom:1px solid rgba(30,86,214,.35);}

/* ============================================================
   表单与弹层
============================================================ */
.modal-overlay{
  position:fixed;inset:0;background:rgba(15,30,61,.45);
  display:none;align-items:flex-start;justify-content:center;
  padding:44px 20px;overflow-y:auto;z-index:200;
}
.modal-overlay.is-open{display:flex;}
.modal-panel{
  position:relative;width:100%;max-width:600px;background:#fff;
  border-radius:var(--r-modal);padding:32px;box-shadow:var(--sh-3);
  animation:modalIn .22s ease-out;
}
@keyframes modalIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.modal-panel h2{font-size:22px;padding-right:44px;}
.modal-sub{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.75;}
.modal-close{
  position:absolute;top:14px;right:14px;width:44px;height:44px;border:0;background:transparent;
  border-radius:10px;font-size:22px;line-height:1;color:var(--muted);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:background .16s ease,color .16s ease;
}
.modal-close:hover{background:var(--brand-soft);color:var(--brand-deep);}

.lead-form{margin-top:22px;}
.field{display:grid;gap:8px;margin-bottom:16px;}
.field label{font-size:14px;font-weight:600;color:var(--text);}
.field .req{color:var(--err);}
.field input,.field select,.field textarea{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);
  border-radius:var(--r-input);background:#fff;color:var(--text);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.field textarea{height:auto;min-height:104px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.field input::placeholder,.field textarea::placeholder{color:#A9B4C7;}
.field.has-error input,.field.has-error textarea{border-color:var(--err);box-shadow:0 0 0 3px rgba(214,69,69,.1);}
.field-err{display:none;font-size:12px;color:var(--err);line-height:1.5;}
.field.has-error .field-err{display:block;}

.check{display:flex;align-items:flex-start;gap:10px;margin:6px 0 18px;font-size:13px;color:var(--muted);line-height:1.7;cursor:pointer;}
.check input{width:18px;height:18px;flex:0 0 18px;margin-top:3px;accent-color:var(--brand);}
.form-note{margin-top:14px;font-size:12.5px;color:var(--muted);line-height:1.7;}
.form-ok{margin-top:14px;font-size:13.5px;font-weight:600;color:#007D6A;}

/* ============================================================
   页脚
============================================================ */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:8px;}
.footer-top{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;
  padding:56px 0 34px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-name{font-size:16px;font-weight:700;color:var(--ink);line-height:1.3;}
.footer-brand .brand-sub{font-size:12px;color:var(--faint);line-height:1.4;}
.site-footer .footer-top > div > p{font-size:14px;color:var(--muted);max-width:32em;line-height:1.8;}
.footer-col h4{font-size:14px;color:var(--ink);margin-bottom:14px;font-weight:700;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--muted);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:18px 0 26px;
  font-size:12.5px;color:var(--faint);
}

/* ============================================================
   响应式
============================================================ */
@media (max-width:1024px){
  .mobile-bar{
    display:flex;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
    align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  }
  .mobile-bar .brand-text strong{font-size:14px;max-width:52vw;overflow:hidden;text-overflow:ellipsis;}
  .mobile-bar .brand-text small{display:none;}
  .burger{
    width:44px;height:44px;flex:0 0 44px;border-radius:10px;border:1px solid var(--line);
    background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:4px;cursor:pointer;
  }
  .burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-deep);}
  .burger:hover{background:var(--brand-soft);}

  .sidebar{
    transform:translateX(-104%);width:286px;padding-top:20px;box-shadow:var(--sh-3);
    transition:transform .28s cubic-bezier(.4,0,.2,1);
  }
  .sidebar.is-open{transform:translateX(0);}
  .drawer-close{display:flex;}
  .shell{margin-left:0;padding-top:60px;}

  .grid-container{padding-left:28px;padding-right:28px;}
  .section{padding:60px 0;}
  .asym{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px;}
}

@media (max-width:768px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:50px 0;}
  .page-head{padding:32px 0 34px;}
  .page-head .lead{font-size:15.5px;}
  .split .sticky-col{position:static;}
  .timeline{grid-template-columns:1fr;gap:20px;}
  .timeline::before{display:none;}
  .tl-item{padding-top:0;padding-left:66px;min-height:52px;}
  .tl-num{top:0;}
  .data-band{grid-template-columns:1fr;}
  .data-cell + .data-cell{border-left:0;border-top:1px solid var(--line);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 22px;gap:20px;}
  .cta-band h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .modal-overlay{padding:24px 16px;}
  .modal-panel{padding:24px 20px;}
  .footer-top{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .faq summary{font-size:16px;}
}

@media (max-width:520px){
  body{font-size:15.5px;}
  .btn{height:46px;padding:0 20px;}
  .btn-block-mobile{width:100%;}
  .point-list li{font-size:14.5px;padding:12px 14px 12px 42px;}
  .point-list li::before{left:16px;}
  .point-list li::after{left:20px;}
  .fc-body{padding:20px;}
  .modal-panel{border-radius:14px;}
}

/* roulang page: category2 */
:root{
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E2E9F4;
  --brand:#1E56D6;
  --brand-deep:#123A9C;
  --brand-soft:#E8EFFD;
  --accent:#FF7A2F;
  --ok:#00A98F;
  --warn:#D98A00;
  --error:#D64545;
  --ink:#0F1E3D;
  --text:#1B2740;
  --muted:#5C6B85;
  --faint:#8A97AC;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:18px;
  --sh-low:0 1px 2px rgba(15,30,61,.05);
  --sh-mid:0 10px 28px -14px rgba(15,30,61,.18);
  --sh-high:0 16px 40px -20px rgba(15,30,61,.28);
  --sidebar-w:256px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;background-color:transparent;transition:color .18s ease-out}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
h1{font-size:42px;letter-spacing:-.4px}
h2{font-size:29px}
h3{font-size:21px}
h4{font-size:17px}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-soft);color:var(--brand-deep)}

/* Foundation 覆盖 */
.grid-container{max-width:1200px;padding-left:40px;padding-right:40px}
.grid-padding-x{margin-left:-14px;margin-right:-14px}
.grid-padding-x>.cell{padding-left:14px;padding-right:14px}
.grid-x>.cell{min-width:0}
.button,.button.primary{background:var(--brand);color:#fff;border-radius:var(--r-btn)}
body,button,input,select,textarea{font-family:inherit}
select,input,textarea{color:var(--text)}

/* 布局骨架 */
.page{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh}
.sidebar{
  position:sticky;top:0;align-self:start;
  height:100vh;overflow-y:auto;
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:20px;
  padding:26px 18px 22px;
  z-index:30;
}
.sidebar .divider{height:1px;background:var(--line)}
.brand{display:flex;align-items:center;gap:11px;padding:0 6px 4px}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  position:relative;box-shadow:0 6px 16px -8px rgba(30,86,214,.75)
}
.brand-mark::after{
  content:"";position:absolute;inset:11px 10px;
  border:2px solid #fff;border-radius:3px;transform:rotate(45deg);
  border-right-color:var(--accent);border-bottom-color:var(--accent);
}
.brand-name{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.35;letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--faint);line-height:1.5;margin-top:2px}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-list a{
  position:relative;display:flex;align-items:center;
  min-height:44px;padding:0 14px;border-radius:10px;
  font-size:14.5px;color:var(--muted);font-weight:500;
  transition:background .18s ease-out,color .18s ease-out;
}
.nav-list a:hover{background:var(--brand-soft);color:var(--brand-deep)}
.nav-list a.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:700}
.nav-list a.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
}
.side-cta{display:block;width:100%;text-align:center}
.side-trust{display:flex;flex-direction:column;gap:10px;padding:0 6px;margin-top:auto}
.side-trust li{
  font-size:12.5px;color:var(--muted);line-height:1.6;
  display:flex;gap:8px;align-items:flex-start;
}
.side-trust li::before{
  content:"";width:6px;height:6px;flex:0 0 6px;margin-top:8px;
  border-radius:2px;background:var(--ok);transform:rotate(45deg);
}

/* 移动顶栏 */
.topbar{
  display:none;position:sticky;top:0;z-index:40;
  height:60px;background:var(--surface);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;
  padding:0 16px;box-shadow:var(--sh-low);
}
.topbar .brand{padding:0}
.topbar .brand-mark{width:30px;height:30px;flex-basis:30px;border-radius:9px}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;display:inline-flex;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
.drawer{
  position:fixed;inset:0;z-index:60;background:rgba(15,30,61,.45);
  display:none;
}
.drawer.is-open{display:block}
.drawer-panel{
  position:absolute;right:0;top:0;bottom:0;width:min(88vw,400px);
  background:var(--surface);padding:20px;overflow-y:auto;
  box-shadow:var(--sh-high);
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-head .t{font-size:14px;color:var(--muted);font-weight:600}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;font-size:20px;line-height:1;color:var(--muted);cursor:pointer;
}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-card{
  display:block;padding:16px 14px;border:1px solid var(--line);border-radius:12px;
  background:#fff;box-shadow:var(--sh-low);
}
.drawer-card b{display:block;font-size:15px;color:var(--ink);margin-bottom:6px;line-height:1.4}
.drawer-card span{display:block;font-size:12.5px;color:var(--muted);line-height:1.6}
.drawer-card.is-active{border-color:rgba(30,86,214,.4);background:var(--brand-soft)}
.drawer-card.is-active b{color:var(--brand-deep)}

/* 通用容器与按钮 */
.section{padding:76px 0}
.section-tight{padding:56px 0}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:1.2px;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-mid)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-low)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand)}
.btn-ghost:hover{border-color:rgba(30,86,214,.4);background:var(--brand-soft);color:var(--brand-deep)}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{font-weight:600;font-size:14.5px;border-bottom:2px solid transparent;padding-bottom:2px;transition:border-color .18s ease-out,color .18s ease-out}
.link-arrow:hover{border-color:var(--accent);color:var(--brand-deep)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.2px;line-height:1;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-deep)}
.badge-ok{background:rgba(0,169,143,.1);color:var(--ok)}
.badge-accent{background:rgba(255,122,47,.12);color:#B94F12}

/* 页面头部横幅 */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--brand-soft);
  border-bottom:1px solid var(--line);
  padding:56px 0 60px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center right;
  opacity:.14;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(30,86,214,.07) 0 1px,transparent 1px 13px);
  pointer-events:none;
}
.page-hero>.grid-container{position:relative;z-index:2}
.watermark{
  position:absolute;right:4%;top:-38px;font-size:230px;font-weight:700;
  color:rgba(30,86,214,.05);line-height:1;pointer-events:none;user-select:none;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--faint);margin-bottom:18px;white-space:nowrap;overflow-x:auto}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B9C4D6}
.breadcrumb .cur{color:var(--text);font-weight:600}
.page-hero h1{font-size:40px;margin-bottom:16px;line-height:1.28}
.page-hero h1 .h1-sub{display:block;font-size:17px;font-weight:600;color:var(--brand);letter-spacing:0;margin-top:10px}
.hero-lead{font-size:16.5px;color:var(--muted);max-width:560px;margin-bottom:22px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.hero-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid rgba(255,255,255,.9);background:#fff;
  box-shadow:var(--sh-mid);
}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;background:var(--brand-soft)}
.hero-visual .float-card{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(255,255,255,.96);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;box-shadow:var(--sh-low);
  display:flex;align-items:center;gap:12px;
}
.hero-visual .float-card b{font-size:22px;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1}
.hero-visual .float-card span{font-size:12.5px;color:var(--muted);line-height:1.5}

/* 信息卡双列 */
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.info-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sh-low);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-mid);border-color:rgba(30,86,214,.28)}
.info-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;margin-bottom:16px;
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
}
.info-card h3{font-size:19px;margin-bottom:10px}
.info-card p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0}
.info-card .tag-row{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}

/* 深色指标条 */
.metrics-band{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:var(--ink);
  padding:44px 40px;
  box-shadow:var(--sh-high);
}
.metrics-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.16;
}
.metrics-band::after{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--accent) 0%,var(--accent) 18%,rgba(255,255,255,.14) 18%,rgba(255,255,255,.14) 100%);
}
.metrics-inner{position:relative;z-index:2}
.metrics-band h2{color:#fff;font-size:26px;margin-bottom:8px}
.metrics-band .band-desc{color:rgba(255,255,255,.68);font-size:14.5px;max-width:620px;margin-bottom:32px}
.metrics-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
.metric{padding:0 22px;border-left:1px solid rgba(255,255,255,.14)}
.metric:first-child{border-left:0;padding-left:0}
.metric .val{
  font-size:40px;font-weight:700;color:#fff;line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:-1px;
}
.metric .val em{font-style:normal;color:var(--accent)}
.metric .unit{font-size:13px;color:rgba(255,255,255,.6);margin-left:4px;font-weight:500}
.metric .cap{font-size:13px;color:rgba(255,255,255,.62);margin-top:8px;line-height:1.6}

/* 步骤条 */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--sh-low);
  border-top:3px solid var(--brand);
}
.step:nth-child(2){border-top-color:var(--accent)}
.step:nth-child(3){border-top-color:var(--ok)}
.step .step-label{font-size:12.5px;font-weight:700;color:var(--faint);letter-spacing:1px;margin-bottom:10px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--muted);margin:0}

/* 左文右图 */
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:start}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;box-shadow:var(--sh-low);font-size:14.5px;color:var(--text);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.check-list li:hover{border-color:rgba(30,86,214,.28);box-shadow:var(--sh-mid)}
.check-list .tick{
  width:20px;height:20px;flex:0 0 20px;margin-top:4px;border-radius:6px;
  background:rgba(0,169,143,.12);position:relative;
}
.check-list .tick::after{
  content:"";position:absolute;left:6px;top:3px;width:5px;height:9px;
  border-right:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(42deg);
}
.aside-sticky{position:sticky;top:28px;display:flex;flex-direction:column;gap:18px}
.aside-sticky img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-img);background:var(--brand-soft);border:1px solid var(--line)}
.mini-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.mini-card{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:16px;box-shadow:var(--sh-low);
}
.mini-card b{display:block;font-size:26px;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.1}
.mini-card span{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.6}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;box-shadow:var(--sh-low);transition:box-shadow .18s ease-out,border-color .18s ease-out;
}
.faq-item:hover{border-color:rgba(30,86,214,.28)}
.faq-item[open]{box-shadow:var(--sh-mid);border-color:rgba(30,86,214,.28)}
.faq-q{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
  min-height:60px;transition:color .18s ease-out,background .18s ease-out;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"";flex:0 0 12px;width:12px;height:12px;margin-top:-4px;
  border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);
  transform:rotate(45deg);transition:transform .2s ease-out,border-color .2s ease-out;
}
.faq-item[open] .faq-q{color:var(--brand-deep);box-shadow:inset 3px 0 0 var(--accent);padding-left:19px}
.faq-item[open] .faq-q::after{transform:rotate(-135deg);border-color:var(--brand);margin-top:4px}
.faq-a{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.85}
.faq-a p{margin:0 0 10px}
.faq-a p:last-child{margin-bottom:0}

/* CTA 卡片 */
.cta-card{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-mid);padding:38px 40px;
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:32px;align-items:center;
}
.cta-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--accent) 100%);
}
.cta-card h2{font-size:25px;margin-bottom:10px}
.cta-card p{color:var(--muted);font-size:15px;margin:0}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.cta-actions .note{font-size:12.5px;color:var(--faint);line-height:1.6}
.privacy-line{font-size:12.5px;color:var(--muted);line-height:1.7;margin-top:26px;max-width:820px}
.privacy-line a{font-weight:600}

/* 弹层 */
.modal{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;padding:20px}
.modal.is-open{display:flex}
.modal-mask{position:absolute;inset:0;background:rgba(15,30,61,.45)}
.modal-panel{
  position:relative;z-index:2;width:min(640px,100%);max-height:90vh;overflow-y:auto;
  background:var(--surface);border-radius:var(--r-modal);
  box-shadow:var(--sh-high);padding:30px 32px 26px;
}
.modal-panel h2{font-size:22px;margin-bottom:8px;padding-right:40px}
.modal-desc{font-size:14px;color:var(--muted);margin-bottom:22px}
.modal-close{
  position:absolute;right:16px;top:16px;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:20px;line-height:1;cursor:pointer;transition:background .18s ease-out,color .18s ease-out;
}
.modal-close:hover{background:var(--brand-soft);color:var(--brand-deep)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field label .req{color:var(--error)}
.field input[type="text"],.field input[type="tel"],.field select,.field textarea{
  width:100%;min-height:46px;padding:10px 14px;font-size:15px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.field .err{display:none;font-size:12px;color:var(--error);margin-top:6px}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--error)}
.field.has-error .err{display:block}
.radio-row{display:flex;flex-wrap:wrap;gap:10px}
.radio-row label{
  display:inline-flex;align-items:center;gap:8px;margin:0;
  min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;background:#fff;
  transition:border-color .18s ease-out,background .18s ease-out,color .18s ease-out;
}
.radio-row label:hover{border-color:rgba(30,86,214,.4);background:var(--brand-soft)}
.radio-row input{accent-color:var(--brand)}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);line-height:1.6;margin-bottom:18px}
.consent input{margin-top:5px;accent-color:var(--brand)}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form-actions .btn{min-width:180px}
.form-tip{font-size:12.5px;color:var(--faint);margin-top:14px;line-height:1.7}
.form-success{
  display:none;background:rgba(0,169,143,.08);border:1px solid rgba(0,169,143,.3);
  color:#0B6B5B;border-radius:12px;padding:14px 16px;font-size:14px;margin-bottom:16px;
}
.form-success.is-visible{display:block}

/* 页脚 */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:56px 0 22px;margin-top:0}
.footer-top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:36px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-brand .brand-name{font-size:16px}
.footer-top p{font-size:13.5px;color:var(--muted);line-height:1.8;max-width:340px}
.footer-col h4{font-size:14px;color:var(--ink);margin-bottom:14px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13.5px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:38px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--faint);line-height:1.7;
}
.to-top{position:fixed;right:22px;bottom:22px;z-index:50;width:46px;height:46px;border-radius:12px;
  background:var(--surface);border:1px solid var(--line);color:var(--brand);box-shadow:var(--sh-mid);
  display:none;align-items:center;justify-content:center;cursor:pointer;font-size:16px}
.to-top.is-visible{display:inline-flex}

@media screen and (max-width:1200px){
  .grid-container{padding-left:28px;padding-right:28px}
  .footer-top{grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:26px}
}
@media screen and (max-width:1024px){
  .page{grid-template-columns:minmax(0,1fr)}
  .sidebar{display:none}
  .topbar{display:flex}
  h1{font-size:32px}
  .page-hero h1{font-size:31px}
  h2{font-size:24px}
  .section{padding:58px 0}
  .section-tight{padding:48px 0}
  .split{grid-template-columns:minmax(0,1fr);gap:28px}
  .aside-sticky{position:static}
  .metrics-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 0}
  .metric:nth-child(odd){border-left:0;padding-left:0}
  .metric{padding:0 18px}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-card{grid-template-columns:minmax(0,1fr);gap:22px;padding:30px 26px}
}
@media screen and (max-width:640px){
  .grid-container{padding-left:20px;padding-right:20px}
  .grid-padding-x{margin-left:-9px;margin-right:-9px}
  .grid-padding-x>.cell{padding-left:9px;padding-right:9px}
  h1{font-size:28px}
  .page-hero{padding:36px 0 42px}
  .page-hero h1{font-size:28px}
  .page-hero h1 .h1-sub{font-size:15px}
  h2{font-size:22px}
  h3{font-size:18px}
  .section{padding:46px 0}
  .section-tight{padding:40px 0}
  .info-grid{grid-template-columns:minmax(0,1fr);gap:16px}
  .steps{grid-template-columns:minmax(0,1fr);gap:14px}
  .mini-cards{grid-template-columns:minmax(0,1fr)}
  .metrics-band{padding:30px 22px}
  .metrics-row{grid-template-columns:minmax(0,1fr);gap:0}
  .metric{border-left:0;padding:16px 0;border-top:1px solid rgba(255,255,255,.14)}
  .metric:first-child{border-top:0;padding-top:0}
  .metric .val{font-size:34px}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .modal-panel{padding:24px 20px 20px;border-radius:16px}
  .form-actions .btn{width:100%}
  .cta-card{padding:26px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-q{font-size:16px;padding:16px 18px}
  .faq-a{padding:0 18px 18px}
  .hero-visual .float-card{left:12px;right:12px;bottom:12px}
  .watermark{display:none}
}