/* roulang page: index */
:root{
  --primary:#2457E6;
  --primary-dark:#1B44C4;
  --primary-soft:#EAF1FF;
  --accent:#FF7A3D;
  --accent-soft:#FFF0E8;
  --mint:#16B8A6;
  --bg:#F5F8FD;
  --section:#EEF4FF;
  --card:#FFFFFF;
  --ink:#0B1B33;
  --ink-2:#5D6B80;
  --line:#E2E8F4;
  --line-2:#C9D6EA;
  --ok:#1F9D6A;
  --err:#D64545;
  --footer:#0B1B33;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 10px 30px rgba(16,42,87,.06);
  --sh-hover:0 14px 36px rgba(16,42,87,.12);
  --sidebar:256px;
  --gap:24px;
}
*{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,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--ink);}
:focus-visible{outline:3px solid rgba(36,87,230,.28);outline-offset:2px;border-radius:6px;}

/* ---------- layout ---------- */
.layout{min-height:100vh;}
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:26px 18px 22px;z-index:60;
}
.brand{display:flex;align-items:center;gap:12px;padding:0 6px 22px;border-bottom:1px solid var(--line);}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;border-radius:12px;
  background:linear-gradient(140deg,var(--primary),#4B7BFF 60%,var(--mint));
  color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(36,87,230,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.28;}
.brand-text .b1{font-size:15px;font-weight:700;color:var(--ink);}
.brand-text .b2{font-size:13px;color:var(--ink-2);letter-spacing:.06em;}
.side-nav{margin-top:22px;display:flex;flex-direction:column;gap:6px;}
.side-label{font-size:12px;color:#93A0B5;letter-spacing:.14em;padding:0 12px 8px;}
.side-nav a{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;color:#334560;transition:background .2s ease,color .2s ease;
}
.side-nav a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:20px;border-radius:3px;background:var(--primary);
  transition:transform .22s ease;
}
.side-nav a:hover{background:#F3F7FF;color:var(--primary);}
.side-nav a.active{background:var(--primary-soft);color:var(--primary);font-weight:600;}
.side-nav a.active::before{transform:translateY(-50%) scaleY(1);}
.side-nav .ico{width:18px;height:18px;flex:0 0 18px;border-radius:6px;background:var(--primary-soft);display:inline-block;}
.side-nav a.active .ico{background:var(--primary);}
.side-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);}
.side-foot .btn{width:100%;}
.side-foot .hint{font-size:12px;color:#93A0B5;line-height:1.6;margin-top:12px;text-align:center;}

.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
}
.topbar .brand{padding:0;border:0;}
.topbar .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;font-size:13px;}
.topbar .brand-text .b1{font-size:14px;}
.topbar .brand-text .b2{font-size:11px;}
.burger{
  width:42px;height:42px;border:1px solid var(--line-2);border-radius:10px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}
.drawer{
  position:fixed;inset:0 auto 0 0;width:280px;background:#fff;z-index:90;
  transform:translateX(-102%);transition:transform .28s ease;
  padding:22px 18px;display:flex;flex-direction:column;box-shadow:0 20px 50px rgba(11,27,51,.18);
}
.drawer-mask{position:fixed;inset:0;background:rgba(11,27,51,.42);z-index:80;opacity:0;visibility:hidden;transition:opacity .28s ease;}
body.drawer-open .drawer{transform:translateX(0);}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open{overflow:hidden;}

.main{margin-left:var(--sidebar);}
.container{max-width:1240px;margin:0 auto;padding:0 32px;}
section{padding:96px 0;}
@media (max-width:1024px){
  .sidebar{display:none;}
  .topbar{display:flex;}
  .main{margin-left:0;padding-top:64px;}
  section{padding:64px 0;}
  .container{padding:0 24px;}
}
@media (max-width:520px){
  section{padding:48px 0;}
  .container{padding:0 16px;}
}

/* ---------- common type ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);border-radius:999px;padding:6px 14px;margin:0 0 18px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(26px,3vw,34px);}
.sec-head p{color:var(--ink-2);font-size:16px;margin-top:12px;max-width:640px;}
.textlink{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--primary);white-space:nowrap;}
.textlink .arw{transition:transform .22s ease;display:inline-block;}
.textlink:hover .arw{transform:translateX(4px);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .12s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(36,87,230,.18);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 8px 20px rgba(36,87,230,.24);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line-2);}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:#B7C9EA;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}

.badge{
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;line-height:1;
  padding:6px 10px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
}
.badge-orange{background:var(--accent-soft);color:#D95E23;}
.badge-mint{background:rgba(22,184,166,.12);color:#0E8E80;}

/* ---------- hero ---------- */
.hero{
  position:relative;padding:88px 0 72px;
  background:
    radial-gradient(900px 420px at 88% -10%,rgba(36,87,230,.14),transparent 62%),
    radial-gradient(600px 320px at 6% 8%,rgba(22,184,166,.10),transparent 60%),
    linear-gradient(180deg,#F7FAFF 0%,var(--bg) 100%);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(36,87,230,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(36,87,230,.045) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 78%);
  mask-image:linear-gradient(180deg,#000,transparent 78%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(34px,4.6vw,52px);line-height:1.15;letter-spacing:-.02em;}
.hero-sub{font-size:17px;color:var(--ink-2);margin-top:20px;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-visual{position:relative;}
.hero-photo{
  position:relative;border-radius:20px;overflow:hidden;
  box-shadow:0 24px 60px rgba(16,42,87,.16);
  border:1px solid rgba(255,255,255,.7);
}
.hero-photo img{width:100%;height:360px;object-fit:cover;}
.hero-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,27,51,0) 42%,rgba(11,27,51,.38) 100%);
}
.float-card{
  position:absolute;left:-26px;bottom:24px;width:240px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;box-shadow:0 18px 40px rgba(16,42,87,.14);
}
.float-card .float-label{font-size:12px;color:#93A0B5;letter-spacing:.06em;}
.float-card strong{display:block;font-size:17px;margin:4px 0 6px;color:var(--ink);}
.float-card p{font-size:12.5px;line-height:1.6;color:var(--ink-2);margin:0;}
.trust{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  margin-top:64px;padding-top:32px;border-top:1px solid rgba(36,87,230,.12);
}
.trust li strong{
  display:block;font-size:clamp(24px,2.6vw,30px);font-weight:700;color:var(--primary);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.trust li span{font-size:13.5px;color:var(--ink-2);}

/* ---------- features ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.feature-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D7E2F5;}
.feature-card.span-2{grid-column:span 2;}
.f-ico{
  width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:16px;margin-bottom:20px;
}
.feature-card:nth-child(2) .f-ico{background:var(--accent-soft);color:#D95E23;}
.feature-card:nth-child(3) .f-ico{background:rgba(22,184,166,.12);color:#0E8E80;}
.feature-card:nth-child(4) .f-ico{background:#F1F0FF;color:#5B4BE0;}
.feature-card h3{font-size:21px;margin-bottom:10px;}
.feature-card p{color:var(--ink-2);font-size:15px;margin-bottom:18px;}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.tag{font-size:12px;padding:5px 11px;border-radius:999px;background:#F2F6FE;color:#4C5E7A;}
.feature-card .textlink{margin-top:auto;}

/* ---------- steps + scenes ---------- */
.scenes{background:var(--section);}
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-bottom:56px;
}
.step{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 24px;
  display:flex;gap:16px;align-items:flex-start;
}
.step .num{
  width:34px;height:34px;flex:0 0 34px;border-radius:50%;
  background:var(--primary);color:#fff;font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.step strong{display:block;font-size:16px;margin-bottom:4px;}
.step span{font-size:13.5px;color:var(--ink-2);line-height:1.6;}
.scene{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:40px 0;
}
.scene + .scene{border-top:1px solid rgba(36,87,230,.10);}
.scene-media img{
  width:100%;height:320px;object-fit:cover;border-radius:var(--r-img);
  box-shadow:0 18px 40px rgba(16,42,87,.12);
}
.scene-body .scene-no{
  display:inline-block;font-size:13px;font-weight:700;color:var(--primary);
  background:var(--primary-soft);border-radius:999px;padding:4px 12px;margin-bottom:16px;
}
.scene-body h3{font-size:24px;margin-bottom:12px;}
.scene-body p{color:var(--ink-2);font-size:15.5px;}
.scene-body .textlink{margin-top:20px;}
.scene.reverse .scene-media{order:2;}

/* ---------- cases ---------- */
.cases{background:var(--section);}
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;display:flex;gap:20px;box-shadow:var(--sh-card);
  transition:transform .22s ease,box-shadow .22s ease;
}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.case-thumb{
  width:88px;height:88px;flex:0 0 88px;border-radius:14px;overflow:hidden;
  background:var(--primary-soft);
}
.case-thumb img{width:100%;height:100%;object-fit:cover;}
.case-body h3{font-size:19px;margin-bottom:8px;}
.case-body p{font-size:14.5px;color:var(--ink-2);}
.case-metrics{display:flex;gap:26px;margin-top:18px;flex-wrap:wrap;}
.case-metrics div strong{display:block;font-size:22px;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.case-metrics div span{font-size:12.5px;color:#8494A8;}
.cases .btn{margin-top:40px;}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.price-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 26px;box-shadow:var(--sh-card);display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease;
}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.price-card.recommend{border:2px solid var(--primary);box-shadow:0 18px 44px rgba(36,87,230,.16);}
.price-card.recommend::before{
  content:"推荐方案";position:absolute;top:-13px;left:26px;
  background:var(--primary);color:#fff;font-size:12px;font-weight:600;
  padding:5px 12px;border-radius:999px;letter-spacing:.04em;
}
.price-card h3{font-size:19px;margin-bottom:6px;}
.price-card .plan-desc{font-size:13.5px;color:var(--ink-2);margin-bottom:22px;}
.price{display:flex;align-items:baseline;gap:6px;margin-bottom:6px;}
.price .num{font-size:40px;font-weight:700;letter-spacing:-.03em;font-variant-numeric:tabular-nums;color:var(--ink);}
.price .cur{font-size:18px;font-weight:700;color:var(--ink);}
.price-card.recommend .price .num,.price-card.recommend .price .cur{color:var(--primary);}
.price-cycle{font-size:13px;color:#8494A8;margin-bottom:24px;}
.plan-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:#3C4C66;line-height:1.6;}
.plan-list li::before{
  content:"";width:16px;height:16px;flex:0 0 16px;margin-top:4px;border-radius:50%;
  background:rgba(31,157,106,.12);
  background-image:linear-gradient(45deg,transparent 45%,var(--ok) 45%,var(--ok) 55%,transparent 55%),
                   linear-gradient(-45deg,transparent 58%,var(--ok) 58%,var(--ok) 68%,transparent 68%);
}
.price-card .btn{margin-top:auto;}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D7E2F5;}
.news-thumb{display:block;position:relative;overflow:hidden;}
.news-thumb img{width:100%;height:180px;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-body .badge{align-self:flex-start;margin-bottom:12px;}
.news-body h3{font-size:17.5px;line-height:1.45;margin-bottom:10px;}
.news-body h3 a{color:var(--ink);}
.news-body h3 a:hover{color:var(--primary);}
.news-body p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:#8494A8;
}
.news-meta a{font-weight:600;font-size:13.5px;display:inline-flex;align-items:center;gap:5px;}
.empty-state{
  border:2px dashed #D8E2F0;border-radius:var(--r-card);
  padding:48px 24px;text-align:center;background:#FAFCFF;
}
.empty-state .empty-ico{
  width:40px;height:40px;margin:0 auto 14px;border-radius:12px;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;
}
.empty-state p{color:var(--ink-2);font-size:15px;margin:0;}

/* ---------- faq ---------- */
.faq{max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:0 24px;margin-bottom:14px;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#CFDDF2;}
.faq-item[open]{border-color:#BFD3F2;box-shadow:var(--sh-card);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:17px;font-weight:600;color:var(--ink);padding:20px 0;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:24px;font-weight:400;color:var(--primary);line-height:1;
  transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .ans{padding:0 0 22px;font-size:15px;line-height:1.78;color:var(--ink-2);border-top:1px solid var(--line);padding-top:16px;}

/* ---------- cta ---------- */
.cta{background:var(--section);}
.cta-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
}
.cta-wrap h2{font-size:clamp(26px,3vw,34px);margin-bottom:14px;}
.cta-wrap .cta-desc{color:var(--ink-2);font-size:16px;max-width:460px;}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:28px;}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:#3C4C66;align-items:flex-start;}
.cta-points li::before{
  content:"";width:18px;height:18px;flex:0 0 18px;margin-top:5px;border-radius:50%;
  background:rgba(36,87,230,.12);
  background-image:linear-gradient(45deg,transparent 44%,var(--primary) 44%,var(--primary) 56%,transparent 56%),
                   linear-gradient(-45deg,transparent 57%,var(--primary) 57%,var(--primary) 67%,transparent 67%);
}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;box-shadow:0 18px 46px rgba(16,42,87,.10);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .form-sub{font-size:13.5px;color:var(--ink-2);margin-bottom:22px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:#4C5E7A;margin-bottom:7px;font-weight:500;}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line-2);border-radius:var(--r-btn);
  background:#FBFDFF;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.6;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:#fff;
  box-shadow:0 0 0 3px rgba(36,87,230,.16);
}
.field input::placeholder,.field textarea::placeholder{color:#A7B3C6;}
.form-note{
  margin-top:14px;font-size:13.5px;color:#0E8E80;background:rgba(22,184,166,.12);
  border-radius:10px;padding:10px 14px;
}
.form-note[hidden]{display:none;}

/* ---------- footer ---------- */
.footer{background:var(--footer);color:#C9D6EA;border-top:4px solid var(--primary);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer .brand{padding:0 0 18px;border:0;}
.footer .brand-text .b1{color:#fff;}
.footer .brand-text .b2{color:#93A5C2;}
.footer p.f-desc{font-size:14px;line-height:1.8;color:#93A5C2;max-width:340px;}
.footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer li{margin-bottom:10px;}
.footer li a{font-size:14px;color:#C9D6EA;}
.footer li a:hover{color:#fff;}
.footer .contact-line{font-size:14px;color:#C9D6EA;margin-bottom:10px;}
.footer .contact-line span{color:#7E90AC;}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.10);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7E90AC;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero{padding:56px 0 48px;}
  .hero-inner{grid-template-columns:1fr;gap:36px;}
  .hero-photo img{height:300px;}
  .float-card{left:16px;bottom:16px;width:220px;}
  .trust{grid-template-columns:repeat(2,1fr);gap:24px;margin-top:44px;}
  .feature-grid{grid-template-columns:1fr 1fr;}
  .feature-card.span-2{grid-column:span 2;}
  .steps{grid-template-columns:1fr;}
  .scene{grid-template-columns:1fr;gap:28px;padding:32px 0;}
  .scene.reverse .scene-media{order:0;}
  .scene-media img{height:260px;}
  .case-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .price-card.recommend{box-shadow:0 14px 34px rgba(36,87,230,.14);}
  .news-grid{grid-template-columns:1fr 1fr;}
  .cta-wrap{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
}
@media (max-width:768px){
  .feature-grid{grid-template-columns:1fr;}
  .feature-card.span-2{grid-column:span 1;}
  .news-grid{grid-template-columns:1fr;}
  .hero-actions .btn{flex:1 1 auto;}
  .case-card{flex-direction:column;gap:16px;}
  .case-thumb{width:100%;height:140px;flex:none;}
  .form-card{padding:24px;}
}
@media (max-width:520px){
  .hero{padding:40px 0 36px;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .hero-photo img{height:220px;}
  .float-card{position:static;width:100%;margin-top:14px;box-shadow:var(--sh-card);}
  .trust{grid-template-columns:1fr 1fr;gap:18px;}
  .trust li strong{font-size:22px;}
  .step{padding:18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer{padding:48px 0 0;}
  .footer-bottom{flex-direction:column;}
  .news-thumb img{height:160px;}
  .faq-item{padding:0 18px;}
  .faq-item summary{font-size:16px;}
}

/* roulang page: article */
:root{
  --primary:#2457E6;
  --primary-dark:#1B44C4;
  --primary-light:#EAF1FF;
  --accent:#FF7A3D;
  --accent-light:#FFF0E8;
  --mint:#16B8A6;
  --bg:#F5F8FD;
  --bg-section:#EEF4FF;
  --card:#FFFFFF;
  --text:#0B1B33;
  --text-2:#5D6B80;
  --text-3:#93A1B8;
  --border:#E2E8F4;
  --border-soft:#E6ECF5;
  --success:#1F9D6A;
  --danger:#D64545;
  --footer-bg:#0B1B33;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 10px 30px rgba(16,42,87,.06);
  --shadow-hover:0 14px 36px rgba(16,42,87,.12);
  --sidebar-w:256px;
}
*{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",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,p{margin:0;}
:focus-visible{outline:3px solid rgba(36,87,230,.25);outline-offset:2px;}

/* ============ 布局骨架 ============ */
.content{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.main{flex:1;padding:32px 0 88px;}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}

/* ============ 侧边导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--border);
  padding:24px 18px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:60;
  transition:transform .3s ease;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand-mark{
  width:40px;height:40px;flex:none;
  border-radius:12px;
  background:linear-gradient(135deg,#2457E6,#1B44C4);
  color:#fff;
  font-size:13px;font-weight:700;letter-spacing:.5px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(36,87,230,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text .b1{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.2px;}
.brand-text .b2{font-size:12px;color:var(--text-2);letter-spacing:1px;}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.side-label{display:block;font-size:12px;color:var(--text-3);letter-spacing:1.5px;margin:0 10px 10px;}
.side-nav a{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;
  border-radius:10px;
  font-size:15px;color:#33415C;
  transition:background .18s ease,color .18s ease;
}
.side-nav a .ico{
  width:6px;height:6px;border-radius:50%;
  background:#C3CFE3;flex:none;transition:background .18s ease;
}
.side-nav a:hover{background:#F3F6FC;color:var(--primary);}
.side-nav a:hover .ico{background:var(--primary);}
.side-nav a.active{background:var(--primary-light);color:var(--primary);font-weight:600;}
.side-nav a.active .ico{background:var(--primary);}
.side-nav a.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:3px;background:var(--primary);
}
.side-foot{margin-top:auto;padding-top:28px;}
.side-note{font-size:12.5px;color:var(--text-3);line-height:1.6;margin-top:12px;text-align:center;}
.side-tip{
  margin-top:16px;padding:14px;border-radius:12px;background:var(--bg-section);
  font-size:12.5px;line-height:1.65;color:var(--text-2);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 8px 20px rgba(36,87,230,.24);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;border-color:#C9D6EA;color:var(--text);}
.btn-outline:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-outline:active{transform:translateY(0);}
.btn-block{width:100%;}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--primary);}
.link-arrow .ar{transition:transform .2s ease;}
.link-arrow:hover .ar{transform:translateX(4px);}

/* ============ 移动端顶栏 ============ */
.mobile-top{
  display:none;
  position:sticky;top:0;z-index:55;
  height:64px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.mobile-top .brand-mark{width:34px;height:34px;border-radius:10px;font-size:11px;}
.mobile-top .brand-text .b1{font-size:14px;}
.mobile-top .brand-text .b2{font-size:11px;letter-spacing:.5px;}
.nav-toggle{
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--border);background:#fff;
  display:flex;align-items:center;justify-content:center;
  transition:background .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:var(--primary-light);border-color:#C9D6EA;}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--text);}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.drawer-mask{
  display:none;
  position:fixed;inset:0;z-index:50;
  background:rgba(11,27,51,.42);
  opacity:0;transition:opacity .25s ease;
}
.drawer-mask.show{display:block;opacity:1;}

/* ============ 面包屑 ============ */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);
  margin-bottom:22px;
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:#B9C5D8;}
.crumbs .current{
  color:var(--text);
  max-width:52%;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ============ 文章头部 ============ */
.channel-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:1px;
  color:var(--primary);background:var(--primary-light);
  padding:5px 12px;border-radius:999px;
}
.article-head{max-width:900px;}
.article-head h1{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.4px;
  margin:16px 0 18px;
  color:var(--text);
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13.5px;color:var(--text-2);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C3CFE3;}
.meta-badge{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:600;
  color:var(--primary-dark);background:var(--primary-light);
  padding:4px 11px;border-radius:999px;
}
.head-divider{
  height:1px;background:var(--border);
  margin:26px 0 0;max-width:900px;
}

/* ============ 文章主体 + 目录 ============ */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:56px;
  align-items:start;
  margin-top:34px;
}
.article-main{max-width:760px;min-width:0;}

.article-body{
  font-size:16.5px;
  line-height:1.8;
  color:#1B2B45;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;
  font-size:26px;line-height:1.35;font-weight:700;
  color:var(--text);
  margin:44px 0 16px;
  padding-left:15px;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;
  width:4px;border-radius:2px;background:var(--primary);
}
.article-body h3{
  font-size:20px;line-height:1.45;font-weight:600;
  color:var(--text);
  margin:32px 0 12px;
  scroll-margin-top:96px;
}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-dark);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin:8px 0;line-height:1.8;}
.article-body li::marker{color:var(--primary);}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;
  background:var(--primary-light);
  border-left:4px solid var(--primary);
  border-radius:0 12px 12px 0;
  color:#24406B;font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-img);margin:26px 0 10px;}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13px;color:var(--text-2);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:collapse;
  margin:26px 0;font-size:15px;
  border-radius:12px;overflow:hidden;
  box-shadow:0 0 0 1px var(--border);
}
.article-body th,.article-body td{
  padding:11px 15px;
  border-bottom:1px solid var(--border);
  text-align:left;vertical-align:top;
}
.article-body thead th{background:var(--primary-light);color:#1B44C4;font-weight:600;}
.article-body tbody tr:nth-child(even){background:#F8FAFE;}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body code{
  background:#F1F5FC;border-radius:6px;padding:2px 6px;
  font-size:14px;color:#1B44C4;
}
.article-body strong{color:var(--text);font-weight:600;}

/* 粘性目录 */
.toc{
  position:sticky;top:32px;
  font-size:14px;
  padding-left:4px;
}
.toc-title{
  font-size:12px;font-weight:600;letter-spacing:1.5px;
  color:var(--text-3);
  margin-bottom:12px;
  padding-left:14px;
}
.toc-list{display:flex;flex-direction:column;}
.toc-list a{
  display:block;
  padding:7px 0 7px 14px;
  border-left:2px solid var(--border);
  color:var(--text-2);
  font-size:14px;line-height:1.5;
  transition:color .18s ease,border-color .18s ease,padding-left .18s ease;
}
.toc-list a:hover{color:var(--primary);border-left-color:#C9D6EA;}
.toc-list a.active{color:var(--primary);border-left-color:var(--primary);font-weight:600;}
.toc-list a.lvl3{padding-left:28px;font-size:13px;}

/* 移动端折叠目录 */
.mobile-toc{display:none;margin-top:26px;}
.mobile-toc-btn{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:48px;padding:0 16px;
  background:#fff;border:1px solid var(--border);border-radius:12px;
  font-size:14.5px;font-weight:600;color:var(--text);
  transition:background .18s ease,border-color .18s ease;
}
.mobile-toc-btn:hover{background:var(--primary-light);border-color:#C9D6EA;}
.mobile-toc-btn .chev{transition:transform .25s ease;color:var(--text-2);}
.mobile-toc.open .mobile-toc-btn .chev{transform:rotate(180deg);}
.mobile-toc-list{
  display:none;
  margin-top:8px;padding:10px;
  background:#fff;border:1px solid var(--border);border-radius:12px;
}
.mobile-toc.open .mobile-toc-list{display:block;}
.mobile-toc-list a{
  display:block;
  padding:9px 12px;border-radius:8px;
  font-size:14px;color:var(--text-2);line-height:1.5;
}
.mobile-toc-list a:hover{background:var(--primary-light);color:var(--primary);}
.mobile-toc-list a.lvl3{padding-left:26px;font-size:13.5px;}

/* 空态 */
.empty-state{
  border:2px dashed #D8E2F0;
  border-radius:16px;
  background:#fff;
  padding:56px 24px;
  text-align:center;
}
.empty-state .es-ico{
  width:56px;height:56px;margin:0 auto 18px;
  border-radius:16px;background:var(--primary-light);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);font-size:26px;
}
.empty-state h3{font-size:19px;font-weight:600;margin-bottom:8px;}
.empty-state p{font-size:14.5px;color:var(--text-2);margin-bottom:22px;}

/* ============ 文末 ============ */
.article-foot{
  margin-top:48px;padding-top:28px;
  border-top:1px solid var(--border);
  max-width:760px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;color:var(--primary);
  background:var(--primary-light);
  padding:5px 13px;border-radius:999px;
  transition:background .18s ease,color .18s ease;
}
.tag:hover{background:#DCE7FF;color:var(--primary-dark);}
.foot-action{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 相关推荐 ============ */
.section{margin-top:72px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:24px;
}
.section-head h2{
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;letter-spacing:-.2px;color:var(--text);
}
.section-head .sub{font-size:14.5px;color:var(--text-2);margin-top:6px;}
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.rel-thumb{position:relative;overflow:hidden;}
.rel-thumb img{width:100%;height:140px;object-fit:cover;transition:transform .4s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.05);}
.rel-body{padding:18px 20px 22px;display:flex;flex-direction:column;flex:1;}
.rel-body .badge{
  align-self:flex-start;
  font-size:12px;font-weight:600;
  color:var(--primary-dark);background:var(--primary-light);
  padding:3px 10px;border-radius:999px;
  margin-bottom:10px;
}
.rel-body h3{font-size:16.5px;font-weight:600;line-height:1.5;color:var(--text);margin-bottom:8px;}
.rel-body p{font-size:14px;line-height:1.7;color:var(--text-2);margin-bottom:16px;flex:1;}
.rel-body .link-arrow{font-size:14px;}

/* ============ 底部 CTA ============ */
.cta-band{
  margin-top:80px;
  background:var(--bg-section);
  border-radius:24px;
  padding:48px;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:40px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(36,87,230,.14),rgba(36,87,230,0) 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(24px,2.6vw,30px);font-weight:700;letter-spacing:-.3px;margin-bottom:12px;}
.cta-band p{font-size:15.5px;line-height:1.75;color:var(--text-2);max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;position:relative;z-index:1;}
.cta-meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:20px;font-size:13.5px;color:var(--text-2);}
.cta-meta span{display:inline-flex;align-items:center;gap:7px;}
.cta-meta i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block;}

/* ============ 页脚 ============ */
.footer{
  background:var(--footer-bg);
  color:#C9D6EA;
  border-top:4px solid var(--primary);
  padding:56px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
}
.footer .brand-text .b1{color:#fff;}
.footer .brand-text .b2{color:#9FB0C9;}
.footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer ul{display:flex;flex-direction:column;gap:10px;}
.footer a{color:#C9D6EA;font-size:14px;}
.footer a:hover{color:#fff;}
.f-desc{font-size:14px;line-height:1.8;color:#9FB0C9;margin-top:18px;max-width:290px;}
.contact-line{font-size:14px;color:#9FB0C9;margin-bottom:10px;line-height:1.7;}
.contact-line span{color:#7F92AE;}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  margin-top:42px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#7F92AE;line-height:1.7;
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .toc{display:none;}
  .mobile-toc{display:block;}
}
@media (max-width:1023px){
  .sidebar{
    transform:translateX(-100%);
    box-shadow:none;
    padding-top:20px;
  }
  .sidebar.open{transform:none;box-shadow:0 20px 60px rgba(11,27,51,.24);}
  .content{margin-left:0;}
  .mobile-top{display:flex;}
  .main{padding:24px 0 64px;}
  .container{padding:0 24px;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;padding:36px;gap:26px;}
  .cta-actions{justify-content:flex-start;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .article-head h1{font-size:26px;line-height:1.32;}
  .article-body{font-size:16px;line-height:1.8;}
  .article-body h2{font-size:22px;margin-top:36px;}
  .article-body h3{font-size:18px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .rel-grid{grid-template-columns:1fr;}
  .section{margin-top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-band{padding:28px 22px;border-radius:18px;margin-top:56px;}
  .cta-actions .btn{width:100%;}
  .footer{padding:40px 0 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .crumbs .current{max-width:100%;white-space:normal;}
  .article-foot{padding-top:24px;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .article-head h1{font-size:23px;}
  .meta-row{font-size:13px;gap:8px 12px;}
  .btn{height:46px;padding:0 18px;font-size:14.5px;}
  .foot-action .btn{width:100%;}
  .empty-state{padding:40px 18px;}
}

/* roulang page: category1 */
:root{
  --primary:#2457E6;
  --primary-dark:#1B44C4;
  --primary-light:#EAF1FF;
  --accent:#FF7A3D;
  --accent-light:#FFF0E8;
  --mint:#16B8A6;
  --bg:#F5F8FD;
  --section:#EEF4FF;
  --card:#FFFFFF;
  --text:#0B1B33;
  --text-2:#5D6B80;
  --border:#E2E8F4;
  --border-2:#E6ECF5;
  --success:#1F9D6A;
  --error:#D64545;
  --footer-bg:#0B1B33;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(16,42,87,.06);
  --shadow-hover:0 14px 36px rgba(16,42,87,.12);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
body.no-scroll{overflow:hidden}
img{display:block;max-width:100%}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
button{font:inherit;color:inherit;border:none;background:none;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(36,87,230,.3);outline-offset:2px;border-radius:6px}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:256px;
  background:#fff;border-right:1px solid var(--border);
  padding:24px 16px 28px;
  display:flex;flex-direction:column;
  z-index:80;overflow-y:auto;
  transition:transform .28s ease;
}
.sidebar .brand{
  display:flex;align-items:center;gap:10px;
  padding:0 6px 20px;border-bottom:1px solid var(--border);
}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,#2457E6,#4C7BFF);
  color:#fff;font-size:13px;font-weight:700;letter-spacing:.5px;
  display:grid;place-items:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text .b1{font-size:15px;font-weight:700;color:var(--text)}
.brand-text .b2{font-size:12px;color:var(--text-2);letter-spacing:.6px}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-label{
  display:block;font-size:12px;color:var(--text-2);
  letter-spacing:1px;padding:14px 10px 6px;
}
.side-nav a{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:background .2s ease,color .2s ease;
}
.side-nav a .ico{
  width:6px;height:6px;border-radius:50%;
  background:#C9D6EA;flex:none;transition:background .2s ease;
}
.side-nav a:hover{background:var(--primary-light);color:var(--primary)}
.side-nav a:hover .ico{background:var(--primary)}
.side-nav a.active{background:var(--primary-light);color:var(--primary);font-weight:600}
.side-nav a.active .ico{background:var(--primary)}
.side-nav a.active::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;
  width:3px;border-radius:3px;background:var(--primary);
}
.side-foot{
  margin-top:auto;padding-top:20px;border-top:1px solid var(--border);
  display:flex;flex-direction:column;gap:10px;
}
.side-foot .hint{
  font-size:12px;line-height:1.65;color:var(--text-2);padding:0 4px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;text-align:center;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,
             border-color .2s ease,transform .12s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 8px 20px rgba(36,87,230,.24)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:focus-visible{outline:3px solid rgba(36,87,230,.25);outline-offset:2px}
.btn-ghost{background:#fff;border:1.5px solid #C9D6EA;color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}

/* ============ 页面骨架 ============ */
.page{margin-left:256px;min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:72px 0}
.section-alt{background:var(--section);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:36px;flex-wrap:wrap;
}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.28;letter-spacing:-.3px}
.section-head p{font-size:15px;color:var(--text-2);margin-top:10px;max-width:640px}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EEF4FF 0%,#F5F8FD 100%);
  border-bottom:1px solid var(--border);
}
.hero::after{
  content:"";position:absolute;right:-160px;top:-140px;width:460px;height:460px;
  border-radius:50%;background:radial-gradient(circle,rgba(36,87,230,.10),rgba(36,87,230,0) 70%);
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:56px 0 64px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:32px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--border);
  color:var(--primary);font-size:13px;font-weight:600;letter-spacing:.3px;
}
.hero h1{
  margin:20px 0 16px;
  font-size:clamp(32px,4vw,46px);
  line-height:1.16;letter-spacing:-.6px;
}
.hero .lead{font-size:17px;color:var(--text-2);max-width:540px;line-height:1.75}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:340px;object-fit:cover;
  border-radius:20px;box-shadow:0 24px 60px rgba(16,42,87,.16);
}
.hero-badge{
  position:absolute;left:-18px;bottom:-20px;
  display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:14px 18px;box-shadow:var(--shadow);
}
.hero-badge-num{font-size:28px;font-weight:700;color:var(--primary);line-height:1}
.hero-badge-txt{font-size:12.5px;color:var(--text-2);line-height:1.5}

/* ============ 入口卡片 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.entry-card{
  display:flex;gap:18px;
  background:var(--card);border:1px solid var(--border-2);
  border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D5E2F8}
.entry-icon{
  width:46px;height:46px;border-radius:12px;flex:none;
  background:var(--primary-light);color:var(--primary);
  display:grid;place-items:center;
}
.entry-body{flex:1;min-width:0}
.entry-card h3{font-size:19px;margin-bottom:8px;letter-spacing:-.2px}
.entry-card p{font-size:14.5px;line-height:1.72;color:var(--text-2)}
.entry-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.entry-link .arw{transition:transform .2s ease}
.entry-link:hover .arw{transform:translateX(4px)}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{
  background:#fff;border:1px solid var(--border-2);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);
  transition:box-shadow .2s ease,transform .2s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-num{
  width:44px;height:44px;border-radius:50%;margin-bottom:18px;
  background:var(--primary);color:#fff;
  font-size:15px;font-weight:700;letter-spacing:.5px;
  display:grid;place-items:center;
}
.step h3{font-size:19px;margin-bottom:10px}
.step p{font-size:14.5px;line-height:1.75;color:var(--text-2)}

/* ============ 安全提示 ============ */
.safe-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 24px}
.safe-item{
  display:flex;align-items:flex-start;gap:12px;
  background:#fff;border:1px solid var(--border-2);border-radius:12px;
  padding:16px 18px;font-size:14.5px;line-height:1.7;color:var(--text-2);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.safe-item:hover{border-color:#CFE0F8;box-shadow:0 6px 18px rgba(16,42,87,.06)}
.safe-item svg{flex:none;margin-top:4px;color:var(--mint)}

/* ============ FAQ ============ */
.faq{max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--border-2);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#CFE0F8;box-shadow:0 8px 24px rgba(16,42,87,.07)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.plus{
  position:relative;width:24px;height:24px;flex:none;
  transition:transform .25s ease;
}
.plus::before,.plus::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
}
.plus::before{left:50%;top:4px;bottom:4px;width:2px;transform:translateX(-50%)}
.plus::after{top:50%;left:4px;right:4px;height:2px;transform:translateY(-50%)}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-answer{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--text-2)}

/* ============ 底部 CTA ============ */
.cta-band{background:var(--section);border-top:1px solid var(--border)}
.cta-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;
  align-items:center;padding:64px 0;
}
.cta-copy h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;letter-spacing:-.3px}
.cta-copy p{margin-top:14px;font-size:15.5px;color:var(--text-2);line-height:1.8;max-width:460px}
.form-card{
  background:#fff;border:1px solid var(--border-2);border-radius:18px;
  padding:28px;box-shadow:var(--shadow);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;
  border:1px solid #C9D6EA;border-radius:var(--radius-sm);
  font:inherit;font-size:15px;color:var(--text);background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:98px;padding:12px 14px;line-height:1.6;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#9AA9BF}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(36,87,230,.15);
}
.form-note{font-size:12.5px;line-height:1.65;color:var(--text-2);margin-top:12px}
.form-ok{
  display:none;margin-top:12px;padding:10px 14px;border-radius:10px;
  background:#E8F7F0;color:var(--success);font-size:13.5px;font-weight:600;
}
.form-ok.show{display:block}

/* ============ 页脚 ============ */
.footer{
  background:var(--footer-bg);color:#C9D6EA;
  border-top:4px solid var(--primary);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;padding:56px 0 40px;
}
.footer .brand{display:flex;align-items:center;gap:10px;padding:0;border:none}
.footer .b1{color:#fff}
.footer .b2{color:#9FB0C9}
.f-desc{font-size:14px;line-height:1.75;margin-top:16px;color:#9FB0C9;max-width:320px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.3px}
.footer ul li{margin-bottom:10px}
.footer ul a{font-size:14px;color:#C9D6EA}
.footer ul a:hover{color:#fff}
.contact-line{font-size:14px;color:#C9D6EA;margin-bottom:10px;line-height:1.7}
.contact-line span{color:#8C9CB5}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 28px;font-size:13px;color:#8C9CB5;
}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  align-items:center;justify-content:space-between;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--border);
  z-index:90;
}
.topbar .brand{padding:0;border:none;gap:8px}
.topbar .brand-mark{width:34px;height:34px;border-radius:10px;font-size:12px}
.burger{
  width:46px;height:40px;border-radius:10px;
  background:var(--primary-light);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{width:18px;height:2px;border-radius:2px;background:var(--primary)}
.scrim{
  display:none;position:fixed;inset:0;background:rgba(11,27,51,.45);
  z-index:70;
}
.scrim.show{display:block}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 24px}
  .hero-inner{gap:40px}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);box-shadow:0 0 40px rgba(11,27,51,.22)}
  .sidebar.open{transform:translateX(0)}
  .page{margin-left:0;padding-top:64px}
  .topbar{display:flex}
  .section{padding:56px 0}
  .hero-inner{padding:44px 0 52px}
  .cta-inner{padding:52px 0;gap:40px}
}
@media (max-width:860px){
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-visual img{height:280px}
  .hero-badge{left:auto;right:16px;bottom:-18px}
  .entry-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .safe-grid{grid-template-columns:1fr}
  .cta-inner{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
  .section-head{margin-bottom:28px}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .hero h1{font-size:30px;letter-spacing:-.2px}
  .hero .lead{font-size:15.5px}
  .hero-actions{gap:10px;margin-top:24px}
  .hero-actions .btn{width:100%}
  .hero-visual img{height:220px;border-radius:16px}
  .hero-badge{padding:10px 14px}
  .hero-badge-num{font-size:22px}
  .section{padding:44px 0}
  .entry-card{padding:20px;gap:14px}
  .entry-card h3{font-size:17px}
  .step{padding:22px}
  .faq-item summary{padding:16px 18px;font-size:15.5px}
  .faq-answer{padding:0 18px 18px;font-size:14.5px}
  .form-card{padding:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --primary:#2457E6;
  --primary-dark:#1B44C4;
  --primary-light:#EAF1FF;
  --accent:#FF7A3D;
  --accent-light:#FFF0E8;
  --mint:#16B8A6;
  --bg:#F5F8FD;
  --section:#EEF4FF;
  --card:#FFFFFF;
  --ink:#0B1B33;
  --muted:#5D6B80;
  --line:#E2E8F4;
  --ok:#1F9D6A;
  --err:#D64545;
  --footer-bg:#0B1B33;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 10px 30px rgba(16,42,87,.06);
  --sh-hover:0 14px 36px rgba(16,42,87,.12);
  --sidebar-w:256px;
}
*,*::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","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
:focus-visible{outline:3px solid rgba(36,87,230,.25);outline-offset:2px;border-radius:6px}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:#fff;border-right:1px solid var(--line);
  padding:26px 18px 22px;display:flex;flex-direction:column;gap:20px;
  overflow-y:auto;z-index:90;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:42px;height:42px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,#2457E6 0%,#4C7BF0 100%);
  color:#fff;font-size:14px;font-weight:700;letter-spacing:.5px;
  display:grid;place-items:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text .b1{font-size:15px;font-weight:700;color:var(--ink)}
.brand-text .b2{font-size:13px;color:var(--muted)}
.side-label{font-size:12px;letter-spacing:.14em;color:#93A1B5;padding-left:10px;margin-top:18px}
.side-nav{display:flex;flex-direction:column;gap:6px;margin-top:18px}
.side-nav a{
  display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:10px;font-size:15px;font-weight:500;color:var(--muted);
  border-left:3px solid transparent;transition:background .2s,color .2s,border-color .2s;
}
.side-nav a:hover{background:#F3F7FF;color:var(--primary-dark)}
.side-nav a.active{
  background:var(--primary-light);color:var(--primary-dark);
  font-weight:600;border-left-color:var(--primary);
}
.side-nav .ico{width:7px;height:7px;border-radius:50%;background:#C6D3E8;flex:none}
.side-nav a.active .ico{background:var(--primary)}
.side-cta{
  margin-top:auto;background:var(--primary-light);border-radius:14px;
  padding:16px;display:flex;flex-direction:column;gap:12px;
}
.side-cta p{font-size:13px;line-height:1.65;color:#3A5680}
.side-contact{font-size:12px;color:#7E8DA6;line-height:1.6}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;
  transition:background .2s,color .2s,border-color .2s,box-shadow .2s,transform .12s;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 8px 20px rgba(36,87,230,.24)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--ink);border-color:#C9D6EA}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.link-arrow .ar{transition:transform .2s ease}
.link-arrow:hover .ar{transform:translateX(4px)}

/* ============ 页面骨架 ============ */
.page{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:95;
  background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;
}
.burger{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;display:grid;place-items:center;gap:4px;cursor:pointer;padding:0;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.burger:hover{background:var(--primary-light);border-color:#C9D6EA}
.scrim{display:none;position:fixed;inset:0;background:rgba(11,27,51,.45);z-index:85}
.scrim.show{display:block}

/* ============ Hero ============ */
.hero{padding:52px 0 76px;background:linear-gradient(180deg,#F5F8FD 0%,#EEF4FF 100%)}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:#8593A8;margin-bottom:22px;flex-wrap:wrap}
.crumbs a{color:#8593A8}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:#C3CEDE}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-light);color:#C4531F;
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero h1{font-size:clamp(32px,4.2vw,50px);line-height:1.16;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--muted);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:38px;padding-top:26px;border-top:1px solid #DCE6F6}
.stat-num{font-size:26px;font-weight:700;color:var(--primary-dark);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:13px;color:var(--muted);margin-top:4px}
.hero-figure{
  position:relative;border-radius:20px;overflow:hidden;background:#fff;
  border:1px solid #E6ECF5;box-shadow:0 18px 44px rgba(16,42,87,.10);
}
.hero-figure img{width:100%;height:400px;object-fit:cover}
.hero-float{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:#fff;border-radius:14px;padding:14px 18px;
  display:flex;align-items:center;gap:12px;box-shadow:0 12px 28px rgba(16,42,87,.16);
}
.hero-float .dot{width:34px;height:34px;border-radius:10px;background:#E8F6F3;color:var(--mint);display:grid;place-items:center;font-weight:700;flex:none}
.hero-float strong{display:block;font-size:14px;line-height:1.4}
.hero-float span{font-size:12.5px;color:var(--muted)}

/* ============ 板块 ============ */
.section{padding:96px 0}
.section.alt{background:var(--section)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:40px}
.section-head .sh-left{max-width:720px}
.section-head h2{font-size:clamp(26px,3vw,34px);line-height:1.25}
.section-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.8}
.tag{
  display:inline-block;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  background:var(--primary-light);color:var(--primary-dark);line-height:1.6;
}
.tag.orange{background:var(--accent-light);color:#C4531F}
.tag.mint{background:#E8F6F3;color:#0E7E71}

/* ============ 功能清单 ============ */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.feature-item{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feature-item:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D3DFF2}
.feature-ico{
  width:44px;height:44px;border-radius:12px;flex:none;
  background:var(--primary-light);color:var(--primary);
  display:grid;place-items:center;font-size:17px;font-weight:700;
}
.feature-item:nth-child(2n) .feature-ico{background:#E8F6F3;color:#0E7E71}
.feature-item h3{font-size:19px;margin-bottom:6px}
.feature-item p{font-size:14.5px;color:var(--muted);line-height:1.78}

/* ============ 对比表 ============ */
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
}
table{width:100%;border-collapse:collapse;min-width:680px}
thead th{
  padding:18px 22px;text-align:left;font-size:15px;font-weight:600;
  background:var(--section);color:var(--ink);white-space:nowrap;
}
thead th.rec{background:var(--primary-light);color:var(--primary-dark)}
tbody td{padding:16px 22px;border-top:1px solid var(--line);font-size:15px;color:var(--muted);vertical-align:top}
tbody td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
tbody td.rec{background:rgba(36,87,230,.05);color:#26406B}
tbody tr:hover td{background:#F8FAFF}
tbody tr:hover td.rec{background:rgba(36,87,230,.09)}
.table-note{margin-top:16px;font-size:13.5px;color:#7E8DA6}

/* ============ 时间线 ============ */
.timeline{max-width:880px}
.tl-item{position:relative;display:grid;grid-template-columns:48px 1fr;gap:20px;padding-bottom:32px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:23px;top:56px;bottom:4px;width:2px;background:var(--line)}
.tl-item:last-child::before{display:none}
.tl-num{
  width:48px;height:48px;border-radius:50%;flex:none;
  background:var(--primary);color:#fff;display:grid;place-items:center;
  font-size:17px;font-weight:700;font-variant-numeric:tabular-nums;
  box-shadow:0 8px 18px rgba(36,87,230,.24);
}
.tl-body{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 24px;box-shadow:var(--sh-card)}
.tl-body h3{font-size:19px;margin-bottom:8px}
.tl-body p{font-size:14.5px;color:var(--muted);line-height:1.8}
.tl-body .tag{margin-top:12px}

/* ============ FAQ ============ */
.faq{max-width:900px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.faq details{border-top:1px solid var(--line)}
.faq details:first-child{border-top:0}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:17px;font-weight:600;color:var(--ink);transition:background .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:#F8FAFF}
.faq summary::after{
  content:"+";font-size:24px;font-weight:400;line-height:1;color:var(--primary);
  transition:transform .25s ease;flex:none;
}
.faq details[open] summary{color:var(--primary-dark)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .ans{padding:0 24px 24px;font-size:15px;line-height:1.85;color:var(--muted);max-width:760px}

/* ============ CTA ============ */
.cta{
  background:linear-gradient(135deg,#EEF4FF 0%,#E6EEFF 100%);
  border:1px solid #DCE6F6;border-radius:24px;padding:52px;
  display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;
}
.cta h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
.cta p{margin-top:14px;font-size:15.5px;color:#41577A;line-height:1.85;max-width:560px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}
.cta-note{font-size:13px;color:#6C7F9C;text-align:center;margin-top:2px}

/* ============ 页脚 ============ */
.footer{
  background:var(--footer-bg);color:#C9D6EA;border-top:4px solid var(--primary);
  padding:64px 0 28px;margin-top:auto;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer .brand .b1{color:#fff}
.footer .brand .b2{color:#93A4BF}
.footer .brand:hover .b1{color:#fff}
.f-desc{margin-top:16px;font-size:14px;line-height:1.85;color:#8FA1BC;max-width:320px}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer li{font-size:14px;line-height:1.6}
.footer ul{display:flex;flex-direction:column;gap:10px}
.footer a{color:#C9D6EA}
.footer a:hover{color:#fff}
.contact-line{font-size:14px;line-height:1.8;color:#B7C6DC;margin-top:2px}
.contact-line span{color:#7E92AD}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8496B1;
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .hero-inner{gap:36px}
  .hero-figure img{height:340px}
  .cta{padding:40px;grid-template-columns:1fr .8fr}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);transition:transform .28s ease;width:280px;box-shadow:0 0 44px rgba(11,27,51,.22)}
  .sidebar.open{transform:translateX(0)}
  .page{margin-left:0;padding-top:64px}
  .mobile-bar{display:flex}
  .hero{padding:36px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-figure img{height:320px}
  .section{padding:64px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .cta{grid-template-columns:1fr;padding:36px;gap:28px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .f-desc{max-width:100%}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .feature-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-stats{gap:24px}
  .hero-figure img{height:250px}
  .hero-actions{gap:12px}
  .faq summary{font-size:16px;padding:18px 20px}
  .faq .ans{padding:0 20px 20px}
  .tl-item{grid-template-columns:40px 1fr;gap:14px}
  .tl-num{width:40px;height:40px;font-size:15px}
  .tl-item::before{left:19px;top:48px}
  .footer{padding:48px 0 24px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero{padding:28px 0 44px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:20px 28px}
  .stat-num{font-size:23px}
  .section{padding:48px 0}
  .feature-item{padding:20px}
  .faq summary{font-size:15.5px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta{padding:28px 22px;border-radius:18px}
}

/* roulang page: category3 */
:root{
  --primary:#2457E6;
  --primary-dark:#1B44C4;
  --primary-light:#EAF1FF;
  --accent:#FF7A3D;
  --accent-light:#FFF0E8;
  --mint:#16B8A6;
  --bg:#F5F8FD;
  --section:#EEF4FF;
  --card:#FFFFFF;
  --ink:#0B1B33;
  --muted:#5D6B80;
  --line:#E2E8F4;
  --ok:#1F9D6A;
  --err:#D64545;
  --foot:#0B1B33;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(16,42,87,.06);
  --shadow-hover:0 14px 36px rgba(16,42,87,.12);
  --side:256px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
::selection{background:rgba(36,87,230,.16)}

/* ---------- 侧边栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side);
  background:#fff;border-right:1px solid var(--line);
  padding:24px 18px;display:flex;flex-direction:column;
  z-index:60;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 6px 0}
.brand-mark{
  width:44px;height:44px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(140deg,#2457E6,#1B44C4);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(36,87,230,.24);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.b1{font-size:15px;font-weight:700;color:var(--ink)}
.b2{font-size:12px;color:var(--muted);letter-spacing:.16em}
.side-label{
  display:block;font-size:12px;color:#8A96AB;
  letter-spacing:.16em;margin:0 0 10px 12px;
}
.side-nav a{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:var(--radius-sm);
  font-size:15px;color:var(--muted);transition:background .2s,color .2s;
  margin-bottom:4px;
}
.side-nav a:hover{background:var(--primary-light);color:var(--primary)}
.side-nav a:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(36,87,230,.25)}
.side-nav a.active{background:var(--primary-light);color:var(--primary);font-weight:600}
.side-nav a.active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;
  width:3px;border-radius:3px;background:var(--primary);
}
.ico{
  width:18px;height:18px;border-radius:6px;background:#DCE5F5;
  position:relative;flex:0 0 auto;transition:background .2s;
}
.ico::after{
  content:"";position:absolute;inset:5px;border-radius:2px;background:#fff;
}
.side-nav a.active .ico{background:var(--primary)}
.side-nav a.active .ico::after{background:var(--primary-light)}
.side-foot{margin-top:auto;padding-top:22px;border-top:1px solid var(--line)}
.side-foot .btn{width:100%}
.side-tip{font-size:12px;color:#8A96AB;line-height:1.7;margin-top:12px;padding:0 4px}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  background:#fff;border-bottom:1px solid var(--line);
  z-index:70;align-items:center;justify-content:space-between;
  padding:0 16px;
}
.topbar .brand-mark{width:38px;height:38px;border-radius:10px;font-size:12px}
.menu-btn{
  width:44px;height:44px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  transition:background .2s,border-color .2s;
}
.menu-btn span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.menu-btn:hover{background:var(--primary-light);border-color:#CBDCFB}
.menu-btn:hover span{background:var(--primary)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,27,51,.42);
  opacity:0;pointer-events:none;transition:opacity .25s;z-index:55;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ---------- 布局 ---------- */
.content{margin-left:var(--side);min-height:100vh;display:flex;flex-direction:column}
main{flex:1 1 auto}
.container{max-width:1240px;margin:0 auto;padding:0 32px;width:100%}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-head h2{font-size:clamp(26px,3vw,34px)}
.sec-head .sub{color:var(--muted);margin-top:10px;font-size:15px;max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-light);border-radius:999px;padding:6px 14px;
  margin-bottom:16px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:background .2s,box-shadow .2s,transform .15s,border-color .2s,color .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(36,87,230,.18)}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 8px 20px rgba(36,87,230,.24);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(36,87,230,.2)}
.btn-ghost{background:#fff;border-color:#C9D6EA;color:var(--ink)}
.btn-ghost:hover{background:var(--primary-light);border-color:#B9CDF0;color:var(--primary);transform:translateY(-1px)}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(36,87,230,.25)}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-weight:600;font-size:15px;
}
.link-arrow::after{content:"→";transition:transform .2s}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:60px 0 56px;
  background:linear-gradient(180deg,#EEF4FF 0%,#F5F8FD 100%);
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(36,87,230,.12),transparent 68%);
  border-radius:50%;pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:clamp(30px,3.9vw,44px);line-height:1.18;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-desc{font-size:17px;color:var(--muted);max-width:560px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{position:relative;border-radius:20px;overflow:hidden;border:1px solid #fff;box-shadow:var(--shadow-hover)}
.hero-media img{width:100%;height:320px;object-fit:cover}
.hero-badge{
  position:absolute;left:16px;bottom:16px;background:#fff;border-radius:12px;
  padding:12px 16px;display:flex;align-items:center;gap:12px;
  box-shadow:0 10px 26px rgba(16,42,87,.16);
}
.hero-badge strong{font-size:20px;color:var(--primary);line-height:1}
.hero-badge span{font-size:12px;color:var(--muted);line-height:1.4}

/* ---------- 静态筛选条 ---------- */
.filter-bar{
  margin-top:30px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  background:#fff;border:1px solid #E6ECF5;border-radius:14px;
  padding:12px;box-shadow:var(--shadow);
}
.chip{
  display:inline-flex;align-items:center;
  font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px;
  background:var(--primary-light);color:var(--primary);border:1px solid transparent;
}
.chip.is-soft{background:#F1F5FC;color:var(--muted)}
.chip.is-current{background:var(--primary);color:#fff}
.search{flex:1 1 220px;display:flex;gap:8px;min-width:190px}
.search input{
  flex:1;height:44px;border:1px solid #C9D6EA;border-radius:var(--radius-sm);
  padding:0 14px;font-size:14px;background:#fff;transition:border-color .2s,box-shadow .2s;
}
.search input::placeholder{color:#9AA7BC}
.search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(36,87,230,.15)}
.search button{
  height:44px;padding:0 18px;border-radius:var(--radius-sm);border:none;
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  transition:background .2s;
}
.search button:hover{background:var(--primary-dark)}

/* ---------- 文章卡 ---------- */
.posts{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.post-card{
  display:flex;gap:16px;background:var(--card);
  border:1px solid #E6ECF5;border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CFDDF7}
.post-thumb{
  flex:0 0 auto;width:200px;height:120px;border-radius:12px;overflow:hidden;background:#E8EEF9;
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{display:flex;flex-direction:column;min-width:0}
.tag{
  display:inline-flex;align-items:center;align-self:flex-start;
  font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;
  background:var(--accent-light);color:#D9601F;margin-bottom:8px;
}
.tag.is-blue{background:var(--primary-light);color:var(--primary)}
.post-body h3{font-size:18px;line-height:1.4;margin-bottom:6px}
.post-desc{
  font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:10px;display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:#8A96AB;
}
.post-meta .go{color:var(--primary);font-weight:600;font-size:16px;line-height:1;transition:transform .2s}
.post-card:hover .post-meta .go{transform:translateX(3px)}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{
  position:relative;background:#fff;border:1px solid #E6ECF5;
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-num{
  width:34px;height:34px;border-radius:50%;background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;
  margin-bottom:14px;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- 图文模块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split + .split{margin-top:72px}
.split.reverse .split-media{order:2}
.split-media img{width:100%;height:330px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
.split-text h3{font-size:24px;margin-bottom:12px}
.split-text p{color:var(--muted);margin-bottom:14px;line-height:1.8}
.ticks{margin:18px 0 22px}
.ticks li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;line-height:1.7;margin-bottom:10px;color:var(--ink);
}
.ticks li::before{
  content:"✓";color:var(--mint);font-weight:700;flex:0 0 auto;line-height:1.7;
}

/* ---------- 相关分类胶囊 ---------- */
.related{display:flex;flex-wrap:wrap;gap:12px}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:999px;background:#fff;
  border:1px solid #E6ECF5;box-shadow:var(--shadow);
  font-size:15px;font-weight:600;color:var(--ink);
  transition:transform .2s,border-color .2s,color .2s,box-shadow .2s;
}
.pill:hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow-hover)}
.pill.is-current{background:var(--primary-light);color:var(--primary);border-color:#CBDCFB;box-shadow:none}
.pill.is-current:hover{transform:none;box-shadow:none}

/* ---------- FAQ ---------- */
.faq{max-width:900px}
.faq details{
  background:#fff;border:1px solid #E6ECF5;border-radius:14px;
  margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden;
  transition:border-color .2s,box-shadow .2s;
}
.faq details:hover{border-color:#CFDDF7}
.faq summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:600;cursor:pointer;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-size:24px;line-height:1;color:var(--primary);
  transition:transform .25s;flex:0 0 auto;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:focus-visible{outline:none;box-shadow:inset 0 0 0 3px rgba(36,87,230,.18)}
.faq .ans{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- CTA / 表单 ---------- */
.cta{
  background:var(--section);border-radius:24px;padding:48px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;
}
.cta h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:14px}
.cta .lead{color:var(--muted);font-size:15px;line-height:1.85;max-width:420px}
.cta-points{margin-top:22px}
.cta-points li{
  display:flex;gap:10px;align-items:flex-start;font-size:14px;
  color:var(--ink);margin-bottom:9px;
}
.cta-points li::before{content:"•";color:var(--primary);font-weight:700}
.form-card{
  background:#fff;border:1px solid #E6ECF5;border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-sub{font-size:13px;color:var(--muted);margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:500}
.field input,.field textarea{
  width:100%;height:48px;border:1px solid #C9D6EA;border-radius:var(--radius-sm);
  padding:0 14px;font-size:14px;background:#fff;
  transition:border-color .2s,box-shadow .2s;
}
.field textarea{height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#9AA7BC}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(36,87,230,.15);
}
.form-ok{
  margin-top:14px;background:#EAF7F1;border:1px solid #C6E9DA;color:#1F7A55;
  border-radius:var(--radius-sm);padding:12px 14px;font-size:13px;
}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--foot);color:#C9D6EA;border-top:4px solid var(--primary);
  padding:64px 0 0;margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer ul li{margin-bottom:10px}
.footer a{color:#C9D6EA;font-size:14px;transition:color .2s}
.footer a:hover{color:#fff}
.footer .brand{padding:0;margin-bottom:16px}
.footer .brand-mark{box-shadow:none}
.footer .b1{color:#fff}
.footer .b2{color:#96A9C6}
.f-desc{font-size:14px;color:#9FB0C9;line-height:1.8;max-width:300px}
.contact-line{font-size:14px;color:#9FB0C9;margin-bottom:8px}
.contact-line span{color:#C9D6EA}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);
  margin-top:48px;padding:22px 0;font-size:13px;color:#8FA2BF;
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .posts{grid-template-columns:1fr}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);transition:transform .28s ease;width:280px;box-shadow:0 0 40px rgba(11,27,51,.18)}
  .sidebar.is-open{transform:translateX(0)}
  .topbar{display:flex}
  .content{margin-left:0;padding-top:64px}
  .hero{padding:44px 0 40px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media img{height:280px}
  .section{padding:64px 0}
  .split{gap:32px}
}
@media (max-width:900px){
  .posts{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .split,.split.reverse{grid-template-columns:1fr}
  .split.reverse .split-media{order:0}
  .split-media img{height:260px}
  .cta{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .hero h1{font-size:30px}
  .hero-actions .btn{width:100%}
  .post-card{flex-direction:column;gap:14px}
  .post-thumb{width:100%;height:180px}
  .filter-bar{padding:12px 10px}
  .faq summary{font-size:16px;padding:16px 18px}
  .faq .ans{padding:0 18px 18px}
  .form-card{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer{padding-top:48px;margin-top:64px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta{padding:24px;border-radius:18px}
}