/* roulang page: index */
:root{
  --brand:#1F6FEB;
  --brand-dark:#1857C7;
  --brand-soft:#EEF5FF;
  --aqua:#0FB5A6;
  --warm:#FF8A3D;
  --bg:#F6F9FD;
  --card:#FFFFFF;
  --ink:#0F172A;
  --muted:#64748B;
  --line:#E3ECF7;
  --deep:#0E1B33;
  --radius:20px;
  --radius-sm:12px;
  --shadow:0 12px 32px rgba(24,87,199,.10);
  --shadow-lg:0 20px 48px rgba(24,87,199,.16);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:76px;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-dark);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-dark);background:var(--brand-soft);
  border:1px solid #D6E6FF;border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--aqua);}
h1{font-size:52px;line-height:1.15;}
h2{font-size:34px;line-height:1.25;}
h3{font-size:21px;line-height:1.35;}
.lead{font-size:18px;color:var(--muted);line-height:1.85;}
.small{font-size:14px;color:var(--muted);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:16px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,111,235,.28);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(31,111,235,.28);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(24,87,199,.32);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:#C9DDFB;}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-2px);}
.btn-quiet{background:transparent;color:var(--brand-dark);padding:0 6px;height:auto;}
.btn-quiet:hover{color:var(--brand);text-decoration:underline;}
.btn-sm{height:42px;padding:0 18px;font-size:15px;}
.btn-lg{height:54px;padding:0 30px;font-size:17px;}
.btn[disabled]{opacity:.5;pointer-events:none;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(15,23,42,.08);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);flex:0 0 auto;}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:42px;height:42px;border-radius:13px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand) 0%,#3C8CF5 60%,var(--aqua) 130%);
  color:#fff;font-size:19px;font-weight:700;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(31,111,235,.3);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:-.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:76px;padding:0 14px;
  font-size:15.5px;font-weight:500;color:#334155;
}
.nav-link:hover{color:var(--brand-dark);}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;border-radius:2px;
  background:transparent;transition:background .2s ease;
}
.nav-link.is-active{color:var(--brand-dark);font-weight:700;}
.nav-link.is-active::after{background:var(--brand);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}

/* mega */
.mega-wrap{position:relative;}
.mega-toggle{
  display:inline-flex;align-items:center;gap:6px;height:42px;padding:0 16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;color:#334155;cursor:pointer;transition:all .2s ease;
}
.mega-toggle:hover{border-color:#C9DDFB;color:var(--brand-dark);background:var(--brand-soft);}
.mega-toggle .caret{transition:transform .2s ease;}
.mega-wrap.open .mega-toggle .caret{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:680px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:26px;opacity:0;visibility:hidden;
  transform:translateY(-6px);transition:opacity .18s ease,transform .18s ease,visibility .18s;
}
.mega-panel::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;border-radius:20px 20px 0 0;
  background:linear-gradient(90deg,var(--brand),var(--aqua));
}
.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-wrap:hover .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:22px;}
.mega-title{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.08em;margin-bottom:12px;}
.mega-link{display:block;font-size:15px;color:#334155;padding:7px 0;font-weight:500;}
.mega-link:hover{color:var(--brand);}
.mega-card{
  display:flex;gap:12px;align-items:center;padding:10px;border:1px solid var(--line);
  border-radius:14px;background:#FBFDFF;transition:all .2s ease;
}
.mega-card:hover{border-color:#C9DDFB;background:var(--brand-soft);transform:translateY(-2px);}
.mega-card img{width:64px;height:48px;border-radius:10px;object-fit:cover;flex:0 0 auto;}
.mega-card strong{display:block;font-size:14px;color:var(--ink);font-weight:600;}
.mega-card span{font-size:12px;color:var(--muted);}

/* mobile drawer */
.nav-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:#fff;cursor:pointer;align-items:center;justify-content:center;
}
.nav-burger span{display:block;width:18px;height:2px;background:#334155;border-radius:2px;position:relative;}
.nav-burger span::before,.nav-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#334155;border-radius:2px;
}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:12px 0 22px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-link{
  display:block;padding:14px 0;font-size:16px;font-weight:600;color:#334155;border-bottom:1px solid #F1F6FD;
}
.mobile-drawer .drawer-link.active{color:var(--brand);}
.drawer-sub{padding:14px 0 4px;font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.06em;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 12% 18%, rgba(31,111,235,.13), transparent 45%),
    radial-gradient(circle at 88% 8%, rgba(15,181,166,.14), transparent 42%),
    linear-gradient(180deg,#F0F6FF 0%,#FFFFFF 78%);
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(31,111,235,.11) 1px, transparent 1px);
  background-size:26px 26px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 72%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 72%);
}
.hero-inner{position:relative;z-index:2;padding:84px 0 92px;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{font-size:52px;margin-bottom:20px;}
.hero h1 .hl{
  background:linear-gradient(180deg,transparent 62%,rgba(31,111,235,.18) 62%);
}
.hero .lead{max-width:600px;margin-bottom:30px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;
  padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#334155;
}
.chip i{width:7px;height:7px;border-radius:50%;background:var(--aqua);display:inline-block;}
.hero-visual{position:relative;}
.hero-img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:24px;
  border:1px solid #DCE9FB;box-shadow:var(--shadow-lg);
}
.version-card{
  position:absolute;left:-18px;bottom:-26px;width:280px;background:#fff;border:1px solid var(--line);
  border-radius:18px;box-shadow:var(--shadow);padding:18px 20px;
}
.version-card .vc-title{font-size:13px;font-weight:700;color:var(--brand-dark);letter-spacing:.06em;margin-bottom:10px;}
.vc-row{display:flex;justify-content:space-between;gap:12px;font-size:14px;padding:6px 0;border-bottom:1px dashed #EDF3FC;}
.vc-row:last-child{border-bottom:0;}
.vc-label{color:var(--muted);}
.vc-value{font-weight:600;color:var(--ink);}

/* ---------- trust bar ---------- */
.trust{background:#fff;border-bottom:1px solid var(--line);}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:34px 0;}
.trust-item{border-left:3px solid var(--brand-soft);padding-left:16px;}
.trust-item b{display:block;font-size:24px;font-weight:700;color:var(--brand-dark);letter-spacing:-.02em;}
.trust-item span{font-size:14px;color:var(--muted);}

/* ---------- feature ---------- */
.feature-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;}
.feature-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:18px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.feature-main:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px;}
.feature-sm{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  box-shadow:var(--shadow);display:flex;gap:18px;align-items:flex-start;
  transition:transform .2s ease,box-shadow .2s ease;
}
.feature-sm:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);}
.icon-box{
  width:50px;height:50px;border-radius:14px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:20px;font-weight:700;
}
.icon-box.aqua{background:#E4F8F6;color:#0A8C80;}
.icon-box.warm{background:#FFF1E6;color:#D9661B;}
.feature-main img{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:14px;border:1px solid var(--line);}
.mini-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;}
.tag{
  display:inline-block;font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);border:1px solid #D6E6FF;
}
.tag.aqua{background:#E4F8F6;color:#0A8C80;border-color:#C7EFEA;}
.tag.warm{background:#FFF1E6;color:#C25A12;border-color:#FFDFC7;}

/* ---------- scene ---------- */
.scene-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center;}
.scene-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:22px;border:1px solid #DCE9FB;box-shadow:var(--shadow);}
.steps{display:flex;flex-direction:column;gap:16px;}
.step{
  display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 24px;
  box-shadow:0 6px 18px rgba(24,87,199,.06);transition:transform .2s ease,box-shadow .2s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.step-num{
  width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,var(--brand),var(--aqua));
  color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto;font-size:15px;
}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.news-card{
  display:flex;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);
  border-radius:18px;padding:24px;box-shadow:0 6px 18px rgba(24,87,199,.06);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#C9DDFB;color:inherit;}
.news-card h3{font-size:18px;color:var(--ink);}
.news-card p{font-size:14.5px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;font-size:13px;color:var(--muted);}
.empty-state{
  background:#fff;border:1px dashed #C9DDFB;border-radius:18px;padding:44px 24px;
  text-align:center;color:var(--muted);font-size:15.5px;
}

/* ---------- category ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:0 6px 18px rgba(24,87,199,.06);display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;color:inherit;
}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);color:inherit;}
.cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.cat-card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.cat-card h3{font-size:18px;}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.7;}
.cat-card .more{font-size:14px;font-weight:600;color:var(--brand-dark);margin-top:auto;}

/* ---------- social ---------- */
.social-wrap{
  background:#fff;border:1px solid var(--line);border-radius:26px;padding:44px;box-shadow:var(--shadow);
}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start;}
.quote-card{
  background:#FBFDFF;border:1px solid var(--line);border-radius:18px;padding:24px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.quote-card:nth-child(2){margin-top:26px;}
.quote-card:nth-child(3){margin-top:10px;}
.quote-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.quote-card p{font-size:15px;color:#334155;line-height:1.8;margin-bottom:16px;}
.quote-who{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:12px;background:var(--brand-soft);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
}
.quote-who strong{display:block;font-size:14.5px;}
.quote-who span{font-size:12.5px;color:var(--muted);}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px;padding-top:32px;border-top:1px solid var(--line);}
.stat-row div b{display:block;font-size:26px;color:var(--brand-dark);letter-spacing:-.02em;}
.stat-row div span{font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  box-shadow:0 4px 14px rgba(24,87,199,.05);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 26px;display:flex;align-items:center;gap:14px;
  font-size:17px;font-weight:600;color:var(--ink);transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"+";width:26px;height:26px;flex:0 0 auto;border-radius:9px;background:var(--brand-soft);
  color:var(--brand-dark);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
}
.faq-item[open] summary::before{content:"–";background:var(--brand);color:#fff;}
.faq-item[open] summary{color:var(--brand-dark);}
.faq-item .faq-body{padding:0 26px 24px 66px;font-size:15.5px;color:var(--muted);line-height:1.85;}
.faq-item:hover{border-color:#C9DDFB;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:26px;padding:56px 56px;
  background:linear-gradient(120deg,#12336F 0%,#1857C7 55%,#1F6FEB 100%);
  color:#fff;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
  box-shadow:0 24px 56px rgba(18,51,111,.28);
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,181,166,.55),transparent 70%);
}
.cta-band h2{color:#fff;margin-bottom:14px;position:relative;z-index:2;}
.cta-band p{color:rgba(255,255,255,.82);font-size:16px;position:relative;z-index:2;}
.cta-actions{display:flex;flex-direction:column;gap:14px;position:relative;z-index:2;}
.btn-white{background:#fff;color:var(--brand-dark);}
.btn-white:hover{background:#F0F6FF;color:var(--brand-dark);transform:translateY(-2px);}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-line:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-2px);}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:rgba(255,255,255,.78);padding:68px 0 26px;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.site-footer .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.site-footer .footer-brand .brand-mark{box-shadow:none;}
.site-footer .footer-brand strong{color:#fff;font-size:17px;}
.site-footer p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66);}
.footer-links a{display:block;font-size:14.5px;color:rgba(255,255,255,.74);padding:6px 0;}
.footer-links a:hover{color:#5FE3D6;}
.footer-contact li{font-size:14.5px;color:rgba(255,255,255,.74);padding:6px 0;}
.footer-bottom{
  margin-top:46px;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:13.5px;color:rgba(255,255,255,.56);
}

/* ---------- sticky cta ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);box-shadow:0 -10px 28px rgba(15,23,42,.10);
}
.sticky-inner{display:flex;align-items:center;gap:18px;justify-content:space-between;padding:14px 0;}
.sticky-inner .sticky-text{font-size:14.5px;color:var(--muted);}
.sticky-inner .sticky-text strong{color:var(--ink);}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .main-nav{gap:0;}
  .nav-link{padding:0 10px;font-size:15px;}
  .mega-panel{width:600px;}
}
@media (max-width:1024px){
  h1,.hero h1{font-size:38px;}
  h2{font-size:28px;}
  .main-nav{display:none;}
  .nav-burger{display:flex;}
  .mega-wrap{display:none;}
  .hero-inner{padding:60px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .version-card{position:static;width:100%;margin-top:20px;}
  .feature-grid{grid-template-columns:1fr;}
  .scene-wrap{grid-template-columns:1fr;gap:34px;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .quote-grid{grid-template-columns:1fr;}
  .quote-card:nth-child(2),.quote-card:nth-child(3){margin-top:0;}
  .cta-band{grid-template-columns:1fr;padding:40px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .section{padding:68px 0;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .header-inner{height:68px;gap:14px;}
  .brand-text em{display:none;}
  .news-grid{grid-template-columns:1fr;}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:16px;padding:26px 0;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .social-wrap{padding:26px;}
  .cta-band{padding:32px 22px;}
  .sticky-inner .sticky-text{display:none;}
  .sticky-inner{justify-content:center;}
  .sticky-inner .btn{width:100%;}
}
@media (max-width:520px){
  h1,.hero h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .cat-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr;}
  .hero-cta .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-item .faq-body{padding:0 20px 22px 20px;}
  .faq-item summary{padding:18px 20px;font-size:16px;}
}

/* roulang page: article */
:root{
  --brand:#1F6FEB;
  --brand-deep:#1857C7;
  --brand-soft:#EEF5FF;
  --teal:#0FB5A6;
  --teal-soft:#E6F8F6;
  --orange:#FF8A3D;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --ink:#0F172A;
  --ink-2:#334155;
  --muted:#64748B;
  --line:#E3ECF7;
  --footer-bg:#0E1B33;
  --radius-s:10px;
  --radius:16px;
  --radius-l:20px;
  --shadow:0 12px 32px rgba(24,87,199,.10);
  --shadow-hover:0 20px 44px rgba(24,87,199,.18);
  --shadow-s:0 4px 14px rgba(15,23,42,.06);
  --ring:0 0 0 3px rgba(31,111,235,.28);
  --ease:all .22s cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  padding-bottom:92px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:var(--ease);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(15,23,42,.08);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--teal));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:19px;box-shadow:0 6px 16px rgba(31,111,235,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.brand-text span{font-size:12px;color:var(--muted);}

.main-nav{display:flex;align-items:center;gap:4px;flex:1;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--ink-2);
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;
  background:var(--brand);color:#fff;border-radius:12px;font-weight:600;font-size:15px;
  box-shadow:0 8px 20px rgba(31,111,235,.25);
}
.nav-cta:hover{background:var(--brand-deep);transform:translateY(-1px);}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  border:1px solid var(--line);border-radius:12px;background:#fff;
  font-size:15px;font-weight:600;color:var(--ink-2);
}
.mega-trigger:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.mega-wrap{position:relative;}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:720px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:0 24px 60px rgba(15,23,42,.16);
  padding:26px;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .15s ease,transform .15s ease,visibility .15s;
  border-top:3px solid var(--brand);
}
.mega-wrap:hover .mega-panel,
.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:24px;}
.mega-col h5{font-size:13px;letter-spacing:.06em;color:var(--muted);font-weight:600;margin:0 0 12px;text-transform:uppercase;}
.mega-col a{display:block;font-size:14px;color:var(--ink-2);padding:7px 0;border-bottom:1px dashed transparent;}
.mega-col a:hover{color:var(--brand);border-bottom-color:var(--line);}
.mega-card{
  display:flex;gap:12px;align-items:center;padding:10px;border:1px solid var(--line);
  border-radius:14px;margin-bottom:10px;background:#FBFDFF;
}
.mega-card:hover{border-color:var(--brand);background:var(--brand-soft);}
.mega-card img{width:74px;height:52px;object-fit:cover;border-radius:10px;}
.mega-card b{display:block;font-size:14px;font-weight:600;}
.mega-card small{color:var(--muted);font-size:12px;}

.nav-toggle{
  display:none;width:46px;height:46px;border:1px solid var(--line);border-radius:12px;
  align-items:center;justify-content:center;font-size:18px;color:var(--ink-2);background:#fff;
}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:14px 0 22px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{display:block;padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line);color:var(--ink-2);}
.mobile-drawer a:last-child{border-bottom:0;}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600;}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:12px;font-weight:600;font-size:15.5px;
  transition:var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,235,.26);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);transform:translateY(-2px);}
.btn-quiet{background:var(--teal-soft);color:#0A8074;}
.btn-quiet:hover{background:#D3F2EE;transform:translateY(-2px);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;transform:none;box-shadow:none;cursor:not-allowed;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;font-size:13px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-deep);
}
.badge-teal{background:var(--teal-soft);color:#0A8074;}
.badge-orange{background:#FFF1E6;color:#C25E15;}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-s);transition:var(--ease);
}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px);}

/* ============ 面包屑与文章头 ============ */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line);}
.crumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);padding:16px 0;flex-wrap:wrap;}
.crumb a:hover{color:var(--brand);}
.crumb i{font-size:10px;opacity:.6;}

.article-hero{
  background:
    linear-gradient(180deg,rgba(238,245,255,.92),rgba(246,249,253,.98)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom:1px solid var(--line);
  padding:56px 0 52px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.article-hero h1{
  font-size:44px;line-height:1.2;font-weight:700;color:var(--ink);max-width:900px;
  letter-spacing:-.02em;
}
.article-lead{
  margin-top:20px;max-width:820px;font-size:17.5px;line-height:1.85;color:var(--ink-2);
}
.meta-row{
  display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:28px;
  padding-top:22px;border-top:1px dashed var(--line);font-size:14px;color:var(--muted);
}
.meta-row span{display:inline-flex;align-items:center;gap:8px;}
.meta-row i{color:var(--brand);}

/* ============ 布局 ============ */
.layout{
  display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:36px;
  padding:64px 0 0;align-items:start;
}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-s);padding:36px 40px;
}
.article-body{font-size:17px;line-height:1.95;color:var(--ink-2);}
.article-body > * + *{margin-top:20px;}
.article-body h2{
  font-size:27px;color:var(--ink);margin-top:44px;padding-left:16px;
  border-left:4px solid var(--brand);line-height:1.35;
}
.article-body h3{font-size:21px;color:var(--ink);margin-top:32px;}
.article-body h4{font-size:18px;color:var(--ink);margin-top:24px;}
.article-body p{color:var(--ink-2);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body ul,.article-body ol{padding-left:0;}
.article-body ul li{position:relative;padding-left:24px;margin-top:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:6px;top:13px;width:7px;height:7px;border-radius:50%;
  background:var(--brand);opacity:.8;
}
.article-body ol{counter-reset:li;}
.article-body ol li{position:relative;padding-left:34px;margin-top:10px;counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:3px;width:22px;height:22px;border-radius:7px;
  background:var(--brand-soft);color:var(--brand-deep);font-size:12.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.article-body img{border-radius:var(--radius);border:1px solid var(--line);margin:26px 0;width:100%;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,111,235,.35);}
.article-body a:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep);}
.article-body blockquote{
  margin:26px 0;padding:20px 24px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:0 var(--radius) var(--radius) 0;color:var(--ink-2);
}
.article-body table{width:100%;border-collapse:separate;border-spacing:0;font-size:15px;margin:26px 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.article-body th{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;text-align:left;}
.article-body th,.article-body td{padding:13px 16px;border-bottom:1px solid var(--line);}
.article-body tr:last-child td{border-bottom:0;}
.article-body code{background:#F1F5FB;border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:14px;color:var(--brand-deep);}

.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--line);
  border-radius:var(--radius);background:#FBFDFF;
}
.empty-state i{font-size:30px;color:var(--muted);}
.empty-state h3{margin-top:14px;font-size:20px;}
.empty-state p{margin-top:8px;color:var(--muted);font-size:15px;}

/* ============ 侧栏 ============ */
.sidebar{display:flex;flex-direction:column;gap:22px;position:sticky;top:100px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  padding:24px;box-shadow:var(--shadow-s);
}
.side-card h3{
  font-size:16px;display:flex;align-items:center;gap:9px;margin-bottom:16px;color:var(--ink);
}
.side-card h3 i{color:var(--brand);font-size:15px;}
.toc-list a{display:block;font-size:14.5px;color:var(--ink-2);padding:8px 0 8px 14px;border-left:2px solid var(--line);}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);background:var(--brand-soft);}
.toc-list a.is-current{color:var(--brand);border-left-color:var(--brand);font-weight:600;}
.rec-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);}
.rec-item:last-child{border-bottom:0;padding-bottom:0;}
.rec-item img{width:78px;height:56px;object-fit:cover;border-radius:10px;flex-shrink:0;}
.rec-item b{font-size:14.5px;font-weight:600;line-height:1.5;display:block;}
.rec-item:hover b{color:var(--brand);}
.rec-item small{color:var(--muted);font-size:12.5px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag-cloud a{
  font-size:13px;padding:6px 12px;border-radius:999px;background:#F1F5FB;
  color:var(--ink-2);border:1px solid transparent;
}
.tag-cloud a:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:rgba(31,111,235,.3);}
.cta-card{
  background:linear-gradient(150deg,#0E1B33,#17356B);color:#fff;border:0;
  border-radius:var(--radius-l);padding:26px;box-shadow:0 18px 40px rgba(14,27,51,.28);
}
.cta-card h3{color:#fff;font-size:17px;}
.cta-card p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.78);margin-top:10px;}
.cta-card .btn{margin-top:18px;width:100%;}

/* ============ 相关推荐 / 返回 ============ */
.section{padding:80px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:30px;}
.section-head p{color:var(--muted);font-size:15px;margin-top:8px;}
.link-more{font-size:14.5px;color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:7px;}
.link-more:hover{gap:11px;color:var(--brand-deep);}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;}
.post-card{overflow:hidden;display:flex;flex-direction:column;}
.post-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.post-card-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-card-body b{font-size:18px;font-weight:700;line-height:1.45;color:var(--ink);}
.post-card:hover b{color:var(--brand);}
.post-card-body p{font-size:14.5px;color:var(--muted);line-height:1.75;}
.post-card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);}
.back-bar{
  margin-top:56px;display:flex;gap:16px;flex-wrap:wrap;align-items:center;
  padding:24px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
}

/* ============ 底部固定转化条 ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(15,23,42,.10);
  backdrop-filter:blur(10px);
}
.sticky-inner{display:flex;align-items:center;gap:18px;padding:14px 0;}
.sticky-inner strong{font-size:15.5px;}
.sticky-inner span{font-size:13.5px;color:var(--muted);}
.sticky-inner .btn{margin-left:auto;}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer-bg);color:#fff;margin-top:96px;padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:42px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--brand),var(--teal));}
.footer-brand strong{font-size:18px;}
.site-footer p{color:rgba(255,255,255,.66);font-size:14.5px;line-height:1.85;}
.site-footer h4{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{font-size:14.5px;color:rgba(255,255,255,.68);}
.footer-links a:hover{color:var(--teal);}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{font-size:14.5px;color:rgba(255,255,255,.68);line-height:1.7;}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .mega-panel{width:640px;}
}
@media (max-width:1024px){
  .main-nav,.nav-actions .mega-wrap{display:none;}
  .nav-toggle{display:inline-flex;}
  .layout{grid-template-columns:1fr;gap:32px;}
  .sidebar{position:static;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-hero h1{font-size:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .header-inner{height:68px;gap:14px;}
  .brand-text span{display:none;}
  .article-hero{padding:40px 0 38px;}
  .article-hero h1{font-size:30px;line-height:1.3;}
  .article-lead{font-size:16px;}
  .panel{padding:26px 20px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:22px;margin-top:34px;}
  .article-body h3{font-size:19px;}
  .section{padding:56px 0 0;}
  .section-head h2{font-size:24px;}
  .grid-3{grid-template-columns:1fr;}
  .sticky-inner{flex-wrap:wrap;gap:10px;}
  .sticky-inner span{display:none;}
  .sticky-inner .btn{margin-left:0;width:100%;}
  .site-footer{margin-top:64px;padding:52px 0 24px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .back-bar{flex-direction:column;align-items:stretch;}
  .back-bar .btn{width:100%;}
}
@media (max-width:520px){
  body{font-size:15.5px;padding-bottom:104px;}
  .brand-text strong{font-size:15px;}
  .article-hero h1{font-size:27px;}
  .meta-row{gap:10px 18px;font-size:13px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F6FEB;
  --c-primary-dark:#1857C7;
  --c-primary-soft:#EEF5FF;
  --c-teal:#0FB5A6;
  --c-teal-soft:#E6F8F5;
  --c-orange:#FF8A3D;
  --c-bg:#F6F9FD;
  --c-surface:#FFFFFF;
  --c-ink:#0F172A;
  --c-muted:#64748B;
  --c-line:#E3ECF7;
  --c-footer:#0E1B33;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-sm:0 6px 18px rgba(24,87,199,.06);
  --shadow-md:0 12px 32px rgba(24,87,199,.10);
  --shadow-lg:0 20px 48px rgba(24,87,199,.14);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-bottom:88px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(31,111,235,.18)}
:focus-visible{outline:3px solid rgba(31,111,235,.35);outline-offset:2px;border-radius:8px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-sm{padding:64px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);background:var(--c-primary-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.eyebrow.teal{color:var(--c-teal);background:var(--c-teal-soft)}
h1.page-title{font-size:clamp(30px,4.2vw,50px);line-height:1.18;font-weight:700;letter-spacing:-.01em;margin-bottom:20px}
h2.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.28;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
h3.card-title{font-size:20px;line-height:1.4;font-weight:600;margin-bottom:10px}
.lead{font-size:17px;line-height:1.85;color:var(--c-muted)}
.muted{color:var(--c-muted)}
.small{font-size:14px}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 28px rgba(24,87,199,.09)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;white-space:nowrap;letter-spacing:-.01em}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-teal) 100%);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
  box-shadow:0 6px 16px rgba(31,111,235,.28);
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:var(--c-muted);
  transition:color .18s ease,background-color .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* Mega menu */
.mega{position:relative}
.mega-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-ink);font-size:14px;font-weight:600;cursor:pointer;
  transition:.18s ease;
}
.mega-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.mega-toggle .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .18s ease}
.mega:hover .mega-toggle .caret,.mega:focus-within .mega-toggle .caret{transform:rotate(-135deg) translateY(-1px)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 16px);
  width:720px;padding:24px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .15s ease,transform .15s ease,visibility .15s ease;
}
.mega-panel::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:700;color:var(--c-muted);letter-spacing:.08em;margin-bottom:14px}
.mega-list{display:flex;flex-direction:column;gap:8px}
.mega-list a{font-size:14px;color:var(--c-ink);padding:6px 8px;border-radius:8px;transition:.16s ease}
.mega-list a:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.mega-card{
  display:block;border:1px solid var(--c-line);border-radius:var(--radius-md);
  overflow:hidden;background:#fff;transition:.2s ease;
}
.mega-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.mega-card span{display:block;padding:10px 12px;font-size:13px;font-weight:600}

/* ============ Buttons / Badges ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px rgba(31,111,235,.24)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(31,111,235,.30)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary-soft);transform:translateY(-2px)}
.btn-neutral{background:#fff;color:var(--c-ink);border-color:var(--c-line)}
.btn-neutral:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:10px}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-arrow::after{content:"→";transition:transform .18s ease}
.link-arrow:hover::after{transform:translateX(4px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;
  background:var(--c-primary-soft);color:var(--c-primary-dark);
}
.badge.teal{background:var(--c-teal-soft);color:#0A8C81}
.badge.orange{background:#FFF2E8;color:#D2661B}
.badge.gray{background:#F1F5F9;color:var(--c-muted)}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EEF5FF 0%,#F6F9FD 100%);
  border-bottom:1px solid var(--c-line);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,111,235,.13) 1px,transparent 1px);
  background-size:24px 24px;opacity:.55;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;
  padding:80px 0 92px;
}
.hero-copy .lead{max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:30px;font-size:14px;color:var(--c-muted)}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta i{width:8px;height:8px;border-radius:50%;background:var(--c-teal);display:inline-block}
.version-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;
}
.version-card .vc-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.version-card .vc-media img{width:100%;height:100%;object-fit:cover}
.version-card .vc-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,23,42,0) 40%,rgba(15,23,42,.55) 100%);
}
.vc-tag{
  position:absolute;left:16px;top:16px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--c-primary-dark);
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:700;
}
.vc-body{padding:22px 24px 24px}
.vc-body dl{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}
.vc-body dt{font-size:12.5px;color:var(--c-muted);margin-bottom:2px}
.vc-body dd{margin:0;font-size:15px;font-weight:600}

/* ============ Stats strip ============ */
.stats{border-bottom:1px solid var(--c-line);background:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:36px 0}
.stat{position:relative;padding-left:20px}
.stat::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--c-primary)}
.stat:nth-child(2)::before{background:var(--c-teal)}
.stat:nth-child(3)::before{background:var(--c-orange)}
.stat:nth-child(4)::before{background:#8B5CF6}
.stat-num{font-size:28px;font-weight:700;line-height:1.2;letter-spacing:-.01em}
.stat-label{font-size:14px;color:var(--c-muted)}

/* ============ Cards ============ */
.card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
  overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D3E3F8}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .38s ease}
.card:hover .card-media img{transform:scale(1.045)}
.card-body{padding:24px}
.card-body p{color:var(--c-muted);font-size:15px;line-height:1.8}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px}
.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}

/* ============ Steps ============ */
.steps-panel{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);padding:36px;
}
.step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;position:relative}
.step{position:relative;padding-top:8px}
.step-num{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-weight:700;font-size:16px;margin-bottom:16px;
}
.step h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--c-muted);line-height:1.8}
.step:not(:last-child)::after{
  content:"";position:absolute;right:-16px;top:26px;width:12px;height:2px;background:var(--c-line);
}

/* ============ Split feature ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--shadow-md);background:#fff;
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:26px}
.check-list li{display:flex;gap:12px;font-size:15px;color:var(--c-muted);line-height:1.75}
.check-list .dot{
  flex:0 0 22px;width:22px;height:22px;margin-top:3px;border-radius:50%;
  background:var(--c-teal-soft);color:#0A8C81;display:grid;place-items:center;
  font-size:12px;font-weight:700;
}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-md);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item[open]{border-color:#CFE0F8;box-shadow:var(--shadow-md)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:0 0 10px;width:10px;height:10px;
  border-right:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:rotate(45deg);transition:transform .2s ease;margin-right:4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-item .faq-body{padding:0 24px 22px;color:var(--c-muted);font-size:15px;line-height:1.85}

/* ============ CTA band ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#1857C7 0%,#1F6FEB 55%,#0FB5A6 130%);
  border-radius:24px;padding:56px;color:#fff;
  display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:center;
  box-shadow:0 24px 56px rgba(24,87,199,.26);
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:rgba(255,255,255,.10);
}
.cta-band h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.3;margin-bottom:14px;position:relative;z-index:2}
.cta-band p{color:rgba(255,255,255,.86);font-size:16px;line-height:1.85;position:relative;z-index:2}
.cta-band .cta-actions{display:flex;flex-direction:column;gap:12px;position:relative;z-index:2}
.btn-white{background:#fff;color:var(--c-primary-dark)}
.btn-white:hover{background:#F2F7FF;transform:translateY(-2px)}
.btn-outline-white{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-outline-white:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}

/* ============ Footer ============ */
.site-footer{background:var(--c-footer);color:#CBD5E1;padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-brand .brand-mark{box-shadow:none}
.site-footer p{font-size:14px;line-height:1.85;color:#97A8C2;max-width:380px}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a{color:#9FB0C9;transition:color .18s ease}
.footer-links a:hover{color:#5AA2FF}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:#9FB0C9}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.10);
  margin-top:44px;padding-top:20px;font-size:13px;color:#7B8BA5;
}

/* ============ Sticky CTA ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:#fff;border-top:1px solid var(--c-line);
  box-shadow:0 -10px 28px rgba(24,87,199,.10);
}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 0}
.sticky-text{font-size:14px;color:var(--c-muted)}
.sticky-text strong{color:var(--c-ink);font-weight:600}
.sticky-actions{display:flex;align-items:center;gap:10px}

/* ============ Responsive ============ */
@media (max-width:1023px){
  .section{padding:64px 0}
  .section-sm{padding:48px 0}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:56px 0 64px}
  .hero-copy .lead{max-width:none}
  .split{grid-template-columns:1fr;gap:32px}
  .cta-band{grid-template-columns:1fr;padding:40px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:28px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .step-row{grid-template-columns:1fr;gap:24px}
  .step:not(:last-child)::after{display:none}
  .media-grid{grid-template-columns:1fr}
  .main-nav{
    position:fixed;left:16px;right:16px;top:82px;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);
    box-shadow:var(--shadow-lg);padding:14px;
    max-height:calc(100vh - 120px);overflow-y:auto;
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;font-size:16px}
  .nav-link.is-active::after{left:14px;right:auto;width:26px;bottom:6px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-actions{margin-left:auto}
  .mega{display:none}
}
@media (max-width:767px){
  .container{padding:0 16px}
  body{padding-bottom:96px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:48px 0 20px}
  .cta-band{border-radius:18px;padding:32px 24px}
  .steps-panel{padding:24px}
  .card-body{padding:20px}
  .sticky-inner{flex-direction:column;align-items:stretch;gap:10px}
  .sticky-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .sticky-actions .btn{width:100%}
  .sticky-text{text-align:center;font-size:13px}
  .hero-actions .btn{width:100%}
}
@media (max-width:520px){
  h1.page-title{font-size:30px}
  .stats-grid{grid-template-columns:1fr}
  .vc-body dl{grid-template-columns:1fr}
  .sticky-actions{grid-template-columns:1fr}
}

/* roulang page: category2 */
:root{
  --brand:#1F6FEB;
  --brand-dark:#1857C7;
  --brand-soft:#EEF5FF;
  --teal:#0FB5A6;
  --teal-soft:#E6F8F6;
  --orange:#FF8A3D;
  --bg:#F6F9FD;
  --card:#FFFFFF;
  --ink:#0F172A;
  --muted:#64748B;
  --line:#E3ECF7;
  --deep:#0E1B33;
  --shadow:0 12px 32px rgba(24,87,199,.10);
  --shadow-hover:0 18px 42px rgba(24,87,199,.16);
  --radius:20px;
  --radius-sm:12px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:76px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul{margin:0;padding:0;list-style:none;}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.section-title{
  font-size:clamp(24px,3vw,34px);
  line-height:1.28;
  font-weight:700;
  margin:16px 0 12px;
  letter-spacing:-.01em;
}
.section-sub{color:var(--muted);font-size:16px;margin:0;}
.muted{color:var(--muted);}
.nowrap{white-space:nowrap;}

/* ---------- 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:1px solid transparent;
  cursor:pointer;transition:all .2s ease;white-space:nowrap;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(31,111,235,.22);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(31,111,235,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#C9D9F2;}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-dark{background:var(--deep);color:#fff;}
.btn-dark:hover{background:#182A4C;transform:translateY(-2px);}
.btn:focus-visible{outline:3px solid rgba(31,111,235,.35);outline-offset:2px;}
.btn[disabled]{opacity:.5;pointer-events:none;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-blue{background:var(--brand-soft);color:var(--brand-dark);}
.badge-teal{background:var(--teal-soft);color:#0A8C82;}
.badge-orange{background:#FFF2E9;color:#C25A16;}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--muted);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(15,23,42,.07);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:74px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),#4C93FF);
  color:#fff;font-size:19px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(31,111,235,.28);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1;}
.nav-link{
  position:relative;
  padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:#38506E;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--brand);
}
.nav-extra{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.mega-toggle{
  display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 16px;border-radius:10px;
  background:#fff;border:1px solid var(--line);
  color:#38506E;font-size:14px;font-weight:600;cursor:pointer;
  transition:all .18s ease;
}
.mega-toggle:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.mega-toggle .caret{transition:transform .2s ease;}
.mega-toggle[aria-expanded="true"] .caret{transform:rotate(180deg);}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:#fff;border:1px solid var(--line);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}

/* Mega 面板 */
.mega-panel{
  position:absolute;left:0;right:0;top:100%;
  background:#fff;border-top:2px solid var(--brand);
  box-shadow:0 24px 48px rgba(15,23,42,.12);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .15s ease,transform .15s ease,visibility .15s;
}
.mega-panel.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.mega-inner{
  display:grid;grid-template-columns:1.1fr 1.1fr 1.2fr;gap:40px;
  padding:32px 0 36px;
}
.mega-col h4{
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--muted);margin:0 0 14px;text-transform:uppercase;
}
.mega-list{display:flex;flex-direction:column;gap:4px;}
.mega-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:10px;
  font-size:14.5px;color:#33506F;transition:all .16s ease;
}
.mega-list a:hover{background:var(--brand-soft);color:var(--brand-dark);}
.mega-list a i{width:6px;height:6px;border-radius:50%;background:var(--brand);flex-shrink:0;}
.mega-list a em{font-style:normal;margin-left:auto;font-size:12px;color:var(--muted);}
.mega-list a:hover em{color:var(--brand-dark);}
.mega-card{
  display:flex;gap:16px;padding:16px;border-radius:16px;
  border:1px solid var(--line);background:#FBFDFF;
  transition:all .2s ease;
}
.mega-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:#CDDDF5;}
.mega-card img{width:104px;height:72px;object-fit:cover;border-radius:12px;flex-shrink:0;}
.mega-card h5{margin:2px 0 6px;font-size:15px;font-weight:700;}
.mega-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.65;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EEF5FF 0%,#F6F9FD 82%);
  padding:72px 0 88px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,111,235,.14) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.5;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;
  border-radius:50%;background:radial-gradient(circle,rgba(15,181,166,.16),transparent 68%);
  pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;}
.hero-title{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.16;font-weight:700;letter-spacing:-.02em;
  margin:20px 0 18px;
}
.hero-title .accent{color:var(--brand);}
.hero-lead{
  font-size:17px;line-height:1.85;color:#41566F;
  max-width:600px;margin:0 0 30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:32px;margin-top:40px;
  padding-top:28px;border-top:1px dashed #CFDFF4;
}
.fact-num{font-size:26px;font-weight:700;color:var(--brand-dark);line-height:1.2;}
.fact-label{font-size:13px;color:var(--muted);}
.hero-visual{position:relative;}
.hero-visual .shot{
  border-radius:24px;overflow:hidden;border:1px solid #D8E6F8;
  box-shadow:0 28px 60px rgba(24,87,199,.18);background:#fff;
}
.hero-visual .shot img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.version-card{
  position:absolute;left:-24px;bottom:-28px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--shadow);padding:18px 22px;min-width:236px;
}
.version-card .vc-title{font-size:12px;letter-spacing:.08em;color:var(--muted);font-weight:700;margin-bottom:8px;}
.version-card .vc-row{display:flex;justify-content:space-between;gap:18px;font-size:14px;padding:5px 0;}
.version-card .vc-row span:first-child{color:var(--muted);}
.version-card .vc-row span:last-child{font-weight:600;}
.hero-chip{
  position:absolute;right:-14px;top:26px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:9px 16px;font-size:13px;font-weight:600;color:var(--teal);
  box-shadow:var(--shadow);
}

/* ---------- 信任条 ---------- */
.trust-bar{
  background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.trust-inner{display:flex;flex-wrap:wrap;gap:12px 40px;align-items:center;padding:20px 0;}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:#3D5571;}
.trust-item i{width:8px;height:8px;border-radius:50%;background:var(--teal);flex-shrink:0;}

/* ---------- 功能目录 + 时间线 ---------- */
.feature-layout{display:grid;grid-template-columns:288px 1fr;gap:44px;align-items:start;}
.toc{
  position:sticky;top:98px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.toc-title{font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--muted);margin:0 0 16px;}
.toc-list{display:flex;flex-direction:column;gap:2px;margin-bottom:22px;}
.toc-list a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14.5px;color:#33506F;
  transition:all .16s ease;
}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand-dark);}
.toc-list a .idx{
  width:22px;height:22px;border-radius:7px;background:var(--brand-soft);
  color:var(--brand-dark);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.toc-filter{border-top:1px dashed var(--line);padding-top:18px;}
.toc-filter .tf-label{font-size:13px;font-weight:700;color:var(--muted);margin-bottom:12px;}
.filter-chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:#F4F8FE;border:1px solid var(--line);color:#3D5571;
  cursor:pointer;transition:all .16s ease;
}
.chip:hover{border-color:var(--brand);color:var(--brand);}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;}
.toc-note{
  margin-top:20px;font-size:13px;color:var(--muted);line-height:1.75;
  background:#F8FBFF;border:1px solid var(--line);border-radius:12px;padding:12px 14px;
}

.timeline{position:relative;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:15px;top:12px;bottom:26px;width:2px;
  background:linear-gradient(180deg,var(--brand),#BBD5F7);
  border-radius:2px;
}
.tl-item{
  position:relative;margin-bottom:28px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:26px 28px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-item:last-child{margin-bottom:0;}
.tl-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CDDDF5;}
.tl-item[hidden]{display:none;}
.tl-dot{
  position:absolute;left:-46px;top:24px;
  width:32px;height:32px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);color:var(--brand-dark);
  font-size:12.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(31,111,235,.2);
}
.tl-head{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:12px;}
.tl-head h3{font-size:21px;font-weight:700;margin:0;letter-spacing:-.01em;}
.tl-body p{margin:0 0 14px;color:#41566F;font-size:15.5px;}
.tl-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px;margin-bottom:16px;}
.tl-list li{
  position:relative;padding-left:20px;font-size:14.5px;color:#41566F;
}
.tl-list li::before{
  content:"";position:absolute;left:0;top:12px;width:7px;height:7px;
  border-radius:50%;background:var(--teal);opacity:.85;
}
.tl-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  padding-top:14px;border-top:1px dashed var(--line);
  font-size:13.5px;color:var(--muted);
}
.tl-meta b{color:#33506F;font-weight:600;}
.empty-state{
  display:none;text-align:center;padding:56px 24px;
  background:#fff;border:1px dashed #C9D9F2;border-radius:18px;color:var(--muted);
}
.empty-state.is-show{display:block;}

/* ---------- 操作路径 ---------- */
.step-track{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
  position:relative;
}
.step-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:26px 22px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-weight:700;font-size:16px;margin-bottom:16px;
}
.step-card h3{font-size:17px;font-weight:700;margin:0 0 8px;}
.step-card p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.75;}

/* ---------- 场景分栏 ---------- */
.scene-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center;}
.scene-media{border-radius:22px;overflow:hidden;border:1px solid #D8E6F8;box-shadow:0 22px 48px rgba(24,87,199,.15);}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.scene-list{display:flex;flex-direction:column;gap:16px;margin-top:28px;}
.scene-item{
  display:flex;gap:16px;padding:18px 20px;border-radius:16px;
  background:#fff;border:1px solid var(--line);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.scene-item:hover{border-color:#C3D6F3;box-shadow:var(--shadow);}
.scene-icon{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--teal-soft);color:#0A8C82;font-weight:700;font-size:14px;
}
.scene-item h3{font-size:16.5px;font-weight:700;margin:0 0 6px;}
.scene-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  margin-bottom:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#C3D6F3;}
.faq-item[open]{box-shadow:var(--shadow);border-color:#C3D6F3;}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:16px;
  padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .q-mark{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.faq-item summary .plus{
  margin-left:auto;width:22px;height:22px;position:relative;flex-shrink:0;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-item summary .plus::before{left:0;top:10px;width:22px;height:2px;}
.faq-item summary .plus::after{left:10px;top:0;width:2px;height:22px;}
.faq-item[open] summary .plus::after{transform:rotate(90deg);opacity:0;}
.faq-answer{padding:0 24px 22px 66px;color:#41566F;font-size:15.5px;}
.faq-answer p{margin:0 0 10px;}
.faq-answer p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:28px;
  background:linear-gradient(135deg,#123B7A 0%,#1F6FEB 100%);
  color:#fff;padding:64px 56px;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-120px;width:360px;height:360px;
  border-radius:50%;background:rgba(255,255,255,.08);
}
.cta-band h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin:0 0 14px;line-height:1.3;}
.cta-band p{margin:0 0 30px;color:rgba(255,255,255,.86);max-width:640px;font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}
.cta-band .btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.22);border-color:#fff;}
.cta-band .btn-white{background:#fff;color:var(--brand-dark);}
.cta-band .btn-white:hover{background:#EAF2FF;transform:translateY(-2px);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--deep);color:#C7D4E8;margin-top:0;
  padding:72px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;
  padding-bottom:48px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--brand),#5AA0FF);}
.footer-brand strong{color:#fff;font-size:16.5px;font-weight:700;}
.site-footer p{color:#9EB0CB;font-size:14.5px;line-height:1.85;margin:0;max-width:360px;}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin:0 0 18px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:#9EB0CB;font-size:14.5px;transition:color .18s ease;}
.footer-links a:hover{color:#5AA0FF;}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{color:#9EB0CB;font-size:14.5px;line-height:1.7;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:22px 0 26px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13.5px;color:#8397B4;
}

/* ---------- 底部固定转化条 ---------- */
.bottom-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -10px 30px rgba(15,23,42,.08);
}
.bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:14px 0;
}
.bottom-inner .bb-text{font-size:14.5px;color:#3D5571;}
.bottom-inner .bb-text strong{color:var(--ink);font-weight:700;}
.bottom-inner .bb-actions{display:flex;gap:12px;flex-shrink:0;}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .hero-grid{gap:44px;}
  .feature-layout{grid-template-columns:250px 1fr;gap:32px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .main-nav{
    position:fixed;top:74px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;padding:20px 24px 40px;overflow-y:auto;
    transform:translateX(-100%);transition:transform .25s ease;
    border-top:1px solid var(--line);
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:12px;}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:var(--brand-soft);}
  .nav-burger{display:flex;}
  .mega-toggle{display:none;}
  .mega-panel{display:none;}
  .hero{padding:52px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-visual{max-width:560px;}
  .version-card{position:static;margin-top:20px;left:auto;bottom:auto;}
  .hero-chip{right:12px;top:12px;}
  .feature-layout{grid-template-columns:1fr;}
  .toc{position:static;}
  .timeline{padding-left:28px;}
  .timeline::before{left:11px;}
  .tl-dot{left:-40px;width:28px;height:28px;font-size:11.5px;}
  .step-track{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-band{padding:48px 32px;}
}
@media (max-width:767px){
  body{padding-bottom:112px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .header-inner{height:66px;gap:14px;}
  .main-nav{top:66px;}
  .brand-text{font-size:15.5px;}
  .hero{background:linear-gradient(180deg,#EEF5FF 0%,#F6F9FD 88%);}
  .hero-facts{gap:22px;}
  .fact-num{font-size:22px;}
  .tl-item{padding:22px 18px;}
  .tl-list{grid-template-columns:1fr;}
  .tl-head h3{font-size:18.5px;}
  .step-track{grid-template-columns:1fr;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;}
  .faq-answer{padding:0 18px 18px 50px;}
  .cta-band{padding:40px 22px;border-radius:20px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding-top:56px;}
  .bottom-inner{flex-direction:column;align-items:stretch;gap:12px;padding:12px 0;}
  .bottom-inner .bb-text{text-align:center;font-size:13.5px;}
  .bottom-inner .bb-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .bottom-inner .btn{width:100%;height:44px;padding:0 12px;font-size:14px;}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .filter-chips{gap:6px;}
  .chip{padding:6px 12px;font-size:12.5px;}
}

/* roulang page: category3 */
:root{
  --brand:#1F6FEB;
  --brand-dark:#1857C7;
  --brand-soft:#EEF5FF;
  --teal:#0FB5A6;
  --teal-soft:#E6F8F6;
  --orange:#FF8A3D;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --ink:#0F172A;
  --muted:#64748B;
  --line:#E3ECF7;
  --footer:#0E1B33;
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 4px 14px rgba(24,87,199,.06);
  --shadow:0 12px 32px rgba(24,87,199,.10);
  --shadow-lg:0 22px 48px rgba(24,87,199,.16);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;
  padding:0 0 84px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.site-body img{display:block;max-width:100%}
.site-body a{text-decoration:none;color:inherit}
.site-body ul{margin:0;padding:0;list-style:none}
.site-body h1,.site-body h2,.site-body h3,.site-body h4,.site-body h5{margin:0;font-weight:700;letter-spacing:.2px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(15,23,42,.08)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;
  border-radius:12px;font-size:17px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--brand) 0%,var(--teal) 100%);
  box-shadow:0 6px 16px rgba(31,111,235,.28);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;flex:1}
.nav-link{
  position:relative;padding:9px 13px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--muted);
  transition:color .2s ease,background .2s ease;white-space:nowrap;
}
.nav-link:hover{color:var(--brand-dark);background:var(--brand-soft)}
.nav-link.is-active{color:var(--brand-dark);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.mega-wrap{position:relative}
.mega-toggle{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 16px;
  border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);
  font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.mega-toggle:hover{border-color:var(--brand);color:var(--brand-dark);box-shadow:var(--shadow-sm)}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:660px;
  background:#fff;border:1px solid var(--line);border-top:3px solid var(--brand);
  border-radius:18px;box-shadow:var(--shadow-lg);padding:24px;
  display:grid;grid-template-columns:1fr 1fr 1.25fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .15s ease,transform .15s ease,visibility .15s ease;
}
.mega-wrap:hover .mega-panel,.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h5{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--muted);margin-bottom:12px}
.mega-col a{display:block;padding:8px 10px;border-radius:9px;font-size:14px;color:var(--ink);transition:background .2s ease,color .2s ease}
.mega-col a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.mega-card{display:flex;align-items:center;gap:10px;padding:8px;border:1px solid var(--line);border-radius:12px;transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease}
.mega-card img{width:58px;height:44px;object-fit:cover;border-radius:9px;flex-shrink:0}
.mega-card span{font-size:13px;font-weight:600;line-height:1.5}
.mega-card:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.menu-btn{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);
  font-size:17px;cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand-dark)}
.mobile-nav{
  display:none;overflow:hidden;max-height:0;
  transition:max-height .3s ease;
  border-top:1px solid transparent;
}
.mobile-nav.is-open{max-height:640px;border-top-color:var(--line)}
.mobile-nav-inner{padding:14px 0 22px;display:grid;gap:6px}
.mobile-nav-inner .nav-link{padding:12px 14px;font-size:15px}
.mobile-group-title{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--muted);margin:14px 0 4px}

/* ---------- Buttons & badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn i{font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,235,.24)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(24,87,199,.30)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);transform:translateY(-2px)}
.btn-soft{background:var(--brand-soft);color:var(--brand-dark)}
.btn-soft:hover{background:#E1EDFF;transform:translateY(-2px)}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:11px}
.btn-block{width:100%}
.btn.is-disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none;transform:none;box-shadow:none}
.btn:focus-visible,.nav-link:focus-visible,.mega-toggle:focus-visible,.menu-btn:focus-visible,.faq-item summary:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(31,111,235,.30)
}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.6;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge-teal{background:var(--teal-soft);color:#0A8C81}
.badge-orange{background:#FFF1E7;color:#C75F16}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-title{font-size:clamp(25px,3vw,34px);line-height:1.28;font-weight:700}
.section-sub{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.85}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand-dark)}
.breadcrumb i{font-size:10px;opacity:.7}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;padding:64px 0 84px;
  background:#EAF3FF url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.88) 46%,rgba(238,245,255,.58) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hero-title{font-size:clamp(30px,4vw,50px);line-height:1.16;font-weight:700;margin:18px 0 0}
.hero-title em{font-style:normal;color:var(--brand-dark)}
.hero-lead{margin-top:20px;font-size:17px;line-height:1.9;color:#334155;max-width:620px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-note{margin-top:18px;font-size:13.5px;color:var(--muted)}
.version-card{
  background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:26px;
}
.version-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:18px;border-bottom:1px dashed var(--line)}
.version-no{font-size:30px;font-weight:700;color:var(--ink);line-height:1.2}
.version-card-top small{display:block;font-size:13px;color:var(--muted);font-weight:500;margin-top:4px}
.version-list{margin-top:18px;display:grid;gap:12px}
.version-list li{display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:14.5px}
.version-list li span:first-child{color:var(--muted)}
.version-list li span:last-child{font-weight:600;color:var(--ink)}
.version-card-foot{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap}

/* ---------- Stats band ---------- */
.stats-band{margin-top:-42px;position:relative;z-index:5}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;
}
.stat-item{padding:26px 24px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:none}
.stat-value{font-size:27px;font-weight:700;color:var(--brand-dark);line-height:1.3}
.stat-label{margin-top:6px;font-size:13.5px;color:var(--muted)}

/* ---------- Compare table ---------- */
.table-shell{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}
.table-scroll{overflow-x:auto}
.compare-table{width:100%;min-width:720px;border-collapse:collapse}
.compare-table th,.compare-table td{padding:18px 22px;text-align:left;font-size:15px;border-bottom:1px solid var(--line);vertical-align:top}
.compare-table thead th{background:var(--brand-soft);color:var(--brand-dark);font-weight:700;font-size:14.5px;white-space:nowrap}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr:hover td{background:#FAFCFF}
.compare-table td:first-child{font-weight:600;color:var(--ink);white-space:nowrap}
.col-new{color:var(--brand-dark);font-weight:600}
.col-old{color:var(--muted)}
.table-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;background:#FAFCFF;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}

/* ---------- Entry cards ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.entry-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#CFE0F8}
.entry-card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.entry-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.entry-card:hover .entry-card-media img{transform:scale(1.04)}
.entry-card-media .badge{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.94);color:var(--brand-dark);box-shadow:var(--shadow-sm)}
.entry-card-body{padding:24px;display:flex;flex-direction:column;flex:1;gap:14px}
.entry-card-body h3{font-size:19px;line-height:1.4}
.entry-card-body p{font-size:14.5px;color:var(--muted);line-height:1.85;margin:0}
.entry-meta{display:grid;gap:8px;font-size:13.5px;color:var(--muted)}
.entry-meta li{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px dashed var(--line)}
.entry-meta li:last-child{border-bottom:none}
.entry-meta b{color:var(--ink);font-weight:600}
.entry-card-body .btn{margin-top:auto}

/* ---------- Notice / split ---------- */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.split-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.split-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.split-media-tag{
  position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.95);
  border-radius:12px;padding:12px 16px;box-shadow:var(--shadow-sm);
}
.split-media-tag strong{display:block;font-size:14.5px}
.split-media-tag span{font-size:12.5px;color:var(--muted)}
.notice-list{display:grid;gap:14px;margin-top:26px}
.notice-list li{
  display:flex;gap:14px;padding:18px 20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.notice-list li:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#CFE0F8}
.notice-icon{
  flex-shrink:0;width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:16px;
}
.notice-text strong{display:block;font-size:15.5px;margin-bottom:4px}
.notice-text p{margin:0;font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- Steps ---------- */
.step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 22px;box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--teal));color:#fff;font-weight:700;font-size:15px;
  box-shadow:0 8px 18px rgba(31,111,235,.24);
}
.step-item h3{margin:18px 0 8px;font-size:17px}
.step-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.85}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;margin:0 auto}
.faq-list{display:grid;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#CFE0F8;box-shadow:var(--shadow)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;cursor:pointer;font-size:16px;font-weight:600;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  color:var(--brand);transition:transform .25s ease;flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 22px;font-size:14.5px;color:var(--muted);line-height:1.9}
.faq-body p{margin:0}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  position:relative;overflow:hidden;border-radius:26px;padding:56px 52px;
  background:linear-gradient(120deg,#1F6FEB 0%,#1857C7 58%,#0FB5A6 130%);
  box-shadow:0 26px 60px rgba(24,87,199,.28);
  display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:center;
}
.cta-inner::after{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.10);
}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,32px);line-height:1.3}
.cta-inner p{margin:16px 0 0;color:rgba(255,255,255,.88);font-size:16px;line-height:1.9;max-width:680px}
.cta-actions{position:relative;z-index:2;display:flex;flex-direction:column;gap:12px}
.cta-actions .btn-ghost{background:#fff;border-color:#fff;color:var(--brand-dark)}
.cta-actions .btn-ghost:hover{background:#EAF2FF}
.cta-actions .btn-line{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.55);color:#fff}
.cta-actions .btn-line:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer);color:#CBD6E8;padding:68px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2E7DF7,#0FB5A6)}
.footer-brand strong{color:#fff;font-size:17px}
.site-footer p{margin:0;font-size:14px;line-height:1.9;color:#94A6C2}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:#94A6C2;transition:color .2s ease}
.footer-links a:hover{color:#6FB0FF}
.footer-contact{display:grid;gap:10px}
.footer-contact li{font-size:14px;color:#94A6C2;line-height:1.8}
.footer-bottom{
  margin-top:52px;padding:22px 0 26px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  font-size:13px;color:#7D8FA9;
}

/* ---------- Sticky CTA ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  box-shadow:0 -10px 28px rgba(15,23,42,.10);
  backdrop-filter:blur(10px);
}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 0}
.sticky-text{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--muted);min-width:0}
.sticky-text strong{color:var(--ink);font-weight:600;white-space:nowrap}
.sticky-actions{display:flex;gap:10px;flex-shrink:0}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .mega-panel{width:600px}
  .header-inner{gap:18px}
}
@media (max-width:1024px){
  .main-nav{display:none}
  .mega-wrap{display:none}
  .menu-btn{display:inline-flex}
  .mobile-nav{display:block}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .split{grid-template-columns:1fr;gap:36px}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .step-list{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item:nth-child(2){border-right:none}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-inner{grid-template-columns:1fr;padding:44px 34px}
  .section{padding:76px 0}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .site-body{font-size:15.5px;padding-bottom:96px}
  .header-inner{min-height:66px}
  .brand-text{font-size:15.5px}
  .hero{padding:44px 0 68px}
  .section{padding:58px 0}
  .section-head{margin-bottom:32px}
  .entry-grid{grid-template-columns:1fr}
  .step-list{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .stat-item{border-right:none;border-bottom:1px solid var(--line)}
  .stat-item:last-child{border-bottom:none}
  .stats-band{margin-top:-30px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .sticky-inner{flex-direction:column;align-items:stretch;gap:10px}
  .sticky-actions{width:100%}
  .sticky-actions .btn{flex:1}
  .hero-actions .btn{flex:1 1 100%}
  .cta-band{padding:0 0 64px}
}
@media (max-width:520px){
  .hero-title{font-size:29px}
  .version-no{font-size:25px}
  .btn{height:47px;padding:0 18px;font-size:14.5px}
  .faq-item summary{font-size:15px;padding:17px 18px}
  .faq-body{padding:0 18px 18px}
  .cta-inner{padding:34px 22px;border-radius:20px}
}

/* roulang page: category4 */
:root{
  --primary:#1F6FEB;
  --primary-dark:#1857C7;
  --primary-light:#EEF5FF;
  --teal:#0FB5A6;
  --teal-light:#E6F8F6;
  --orange:#FF8A3D;
  --orange-light:#FFF2E8;
  --bg:#F6F9FD;
  --card:#FFFFFF;
  --ink:#0F172A;
  --muted:#64748B;
  --border:#E3ECF7;
  --footer:#0E1B33;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 32px rgba(24,87,199,.10);
  --shadow-hover:0 20px 46px rgba(24,87,199,.18);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0 0 96px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
h1{font-size:clamp(30px,4vw,52px);line-height:1.18;font-weight:700;letter-spacing:-.4px;}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.26;font-weight:700;}
h3{font-size:clamp(18px,1.8vw,22px);line-height:1.4;font-weight:600;}
p{font-size:16.5px;color:#334155;}
ul{list-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--primary-dark);}
img{max-width:100%;display:block;object-fit:cover;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:3px solid rgba(31,111,235,.35);outline-offset:2px;border-radius:8px;}

.container{max-width:1240px;margin:0 auto;padding:0 32px;}
.section{padding:92px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.6px;
  color:var(--primary);background:var(--primary-light);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.section-desc{color:var(--muted);font-size:16.5px;margin-top:14px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(15,23,42,.07);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;font-weight:700;font-size:20px;
  box-shadow:0 8px 20px rgba(31,111,235,.32);
}
.brand-text{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:-.2px;white-space:nowrap;}
.brand:hover .brand-text{color:var(--primary-dark);}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;
  padding:10px 14px;border-radius:10px;
  font-size:15.5px;font-weight:500;color:#3B4A61;
  white-space:nowrap;transition:background .18s ease,color .18s ease;
}
.nav-link:hover{background:var(--primary-light);color:var(--primary-dark);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--primary);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}

.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 14px;border-radius:10px;border:1px solid var(--border);
  background:#fff;color:#3B4A61;font-size:15px;font-weight:500;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.mega-trigger:hover{border-color:#C7DCFB;color:var(--primary);background:var(--primary-light);}
.mega-trigger svg{transition:transform .2s ease;}
.mega-wrap:hover .mega-trigger svg{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);
  width:720px;background:#fff;border:1px solid var(--border);
  border-radius:20px;box-shadow:0 26px 60px rgba(15,23,42,.16);
  padding:26px;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
}
.mega-panel::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:3px;
  border-radius:0 0 4px 4px;background:linear-gradient(90deg,var(--primary),var(--teal));
}
.mega-wrap:hover .mega-panel,
.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.05fr;gap:24px;}
.mega-col h5{
  font-size:12.5px;font-weight:700;letter-spacing:1px;color:var(--muted);
  text-transform:uppercase;margin-bottom:14px;
}
.mega-col a{
  display:block;padding:8px 10px;margin:0 -10px;border-radius:9px;
  font-size:15px;color:#334155;transition:background .16s ease,color .16s ease;
}
.mega-col a:hover{background:var(--primary-light);color:var(--primary-dark);}
.mega-card{
  display:block;border:1px solid var(--border);border-radius:14px;
  overflow:hidden;background:#fff;transition:transform .2s ease,box-shadow .2s ease;
}
.mega-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.mega-card img{width:100%;aspect-ratio:16/9;}
.mega-card span{display:block;padding:12px 14px;font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.5;}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--border);background:#fff;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#3B4A61;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#3B4A61;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.mobile-drawer{
  display:none;border-top:1px solid var(--border);background:#fff;
  padding:16px 32px 24px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;padding:14px 4px;font-size:16px;color:#334155;
  border-bottom:1px solid #F1F6FD;
}
.mobile-drawer a.is-active{color:var(--primary);font-weight:600;}
.mobile-drawer .drawer-cta{margin-top:18px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15.5px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(31,111,235,.28);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(24,87,199,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--primary);border-color:#C7DCFB;}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 18px;font-size:15px;border-radius:11px;}
.btn-lg{height:54px;padding:0 30px;font-size:16.5px;}
.btn-block{width:100%;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
}
.badge-blue{background:var(--primary-light);color:var(--primary-dark);}
.badge-teal{background:var(--teal-light);color:#0B8F84;}
.badge-orange{background:var(--orange-light);color:#C25E1C;}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:14px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb span.sep{margin:0 8px;color:#B6C6DA;}
.crumb strong{color:#334155;font-weight:600;}

/* ============ 分类 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;margin-top:20px;
  border-radius:26px;border:1px solid var(--border);
  background:#fff;box-shadow:var(--shadow);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(115deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.90) 46%,rgba(238,245,255,.62) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center right;
}
.hero-body{position:relative;padding:60px 56px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.hero-body h1{max-width:15em;}
.hero-lead{margin-top:20px;font-size:17px;color:#3B4A61;max-width:42em;}
.hero-points{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-figure{position:relative;border-radius:20px;overflow:hidden;box-shadow:0 22px 48px rgba(15,23,42,.18);}
.hero-figure img{width:100%;aspect-ratio:4/3;}
.hero-figure figcaption{
  position:absolute;left:16px;right:16px;bottom:16px;
  background:rgba(255,255,255,.94);border-radius:14px;padding:12px 16px;
  font-size:13.5px;color:#3B4A61;line-height:1.6;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.hero-figure figcaption b{color:var(--ink);}

/* ============ 知识库布局 ============ */
.kb-grid{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:40px;align-items:start;}
.kb-main{min-width:0;}
.anchor-target{scroll-margin-top:110px;}

.faq-group{
  background:#fff;border:1px solid var(--border);border-radius:20px;
  padding:30px 32px;box-shadow:0 6px 20px rgba(24,87,199,.05);
  margin-bottom:24px;transition:box-shadow .22s ease,transform .22s ease;
}
.faq-group:hover{box-shadow:var(--shadow);}
.faq-group-head{display:flex;align-items:center;gap:14px;margin-bottom:8px;}
.group-index{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:grid;place-items:center;font-size:15px;font-weight:700;
  background:var(--primary-light);color:var(--primary-dark);
}
.faq-group-head h2{font-size:21px;}
.faq-group > p.group-desc{color:var(--muted);font-size:15.5px;margin:6px 0 18px 52px;}

.faq-item{border-top:1px solid #EFF5FC;}
.faq-item:first-of-type{border-top:1px solid #EFF5FC;}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 44px 18px 0;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border-radius:9px;background:var(--primary-light);
  color:var(--primary-dark);font-size:18px;font-weight:600;
  display:grid;place-items:center;transition:background .18s ease,color .18s ease;
}
.faq-item[open] summary{color:var(--primary-dark);}
.faq-item[open] summary::after{content:"–";background:var(--primary);color:#fff;}
.faq-item summary:hover{color:var(--primary-dark);}
.faq-answer{padding:0 44px 20px 0;font-size:16px;color:#475569;}
.faq-answer p{font-size:16px;color:#475569;margin-bottom:10px;}
.faq-answer ul{margin:10px 0 4px;padding-left:0;}
.faq-answer li{
  position:relative;padding-left:22px;margin-bottom:8px;
  font-size:15.8px;color:#475569;
}
.faq-answer li::before{
  content:"";position:absolute;left:4px;top:12px;
  width:7px;height:7px;border-radius:50%;background:var(--teal);
}

/* ============ 侧栏 ============ */
.sidebar{position:sticky;top:104px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:#fff;border:1px solid var(--border);border-radius:18px;
  padding:22px;box-shadow:0 6px 20px rgba(24,87,199,.05);
}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:4px;height:16px;border-radius:3px;background:var(--primary);}
.toc-list a{
  display:flex;gap:10px;align-items:flex-start;
  padding:9px 10px;margin:0 -10px;border-radius:10px;
  font-size:15px;color:#3B4A61;line-height:1.55;
  transition:background .16s ease,color .16s ease;
}
.toc-list a:hover{background:var(--primary-light);color:var(--primary-dark);}
.toc-list .num{font-size:12.5px;font-weight:700;color:var(--primary);padding-top:3px;}
.reco-list a{
  display:block;padding:11px 12px;margin-bottom:8px;border-radius:12px;
  border:1px solid var(--border);background:#FBFDFF;
  font-size:15px;font-weight:500;color:#334155;
  transition:border-color .18s ease,background .18s ease,transform .18s ease;
}
.reco-list a:hover{border-color:#C7DCFB;background:var(--primary-light);color:var(--primary-dark);transform:translateX(3px);}
.reco-list a span{display:block;font-size:13px;color:var(--muted);margin-top:4px;font-weight:400;}
.tags{display:flex;flex-wrap:wrap;gap:9px;}
.tag{
  display:inline-block;padding:6px 13px;border-radius:999px;
  background:#F4F8FE;border:1px solid var(--border);
  font-size:13.5px;color:#47607F;transition:all .18s ease;
}
.tag:hover{background:var(--primary);border-color:var(--primary);color:#fff;}
.side-cta{
  background:linear-gradient(150deg,#0E1B33,#153063);
  border-radius:18px;padding:24px;color:#fff;border:none;
}
.side-cta h3{color:#fff;}
.side-cta h3::before{background:var(--teal);}
.side-cta p{color:#B9C8E2;font-size:14.5px;margin-bottom:16px;}
.side-cta .btn-primary{box-shadow:0 10px 24px rgba(31,111,235,.4);}
.side-figure{border-radius:18px;overflow:hidden;border:1px solid var(--border);background:#fff;}
.side-figure img{width:100%;aspect-ratio:16/9;}
.side-figure span{display:block;padding:14px 16px;font-size:14.5px;color:#3B4A61;line-height:1.6;}

/* ============ CTA 区块 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:26px;
  background:linear-gradient(120deg,#0E1B33 0%,#153063 58%,#1B4A9C 100%);
  padding:56px;display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,181,166,.36),transparent 68%);
}
.cta-band h2{color:#fff;}
.cta-band p{color:#BACAE3;margin-top:14px;max-width:46em;}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;}
.cta-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;}
.cta-figure{position:relative;z-index:1;border-radius:18px;overflow:hidden;box-shadow:0 24px 50px rgba(0,0,0,.3);}
.cta-figure img{width:100%;aspect-ratio:16/10;}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer);color:#C6D3E8;margin-top:96px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:38px;height:38px;font-size:18px;border-radius:11px;}
.footer-brand strong{color:#fff;font-size:17.5px;font-weight:700;}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.site-footer p{color:#9FB1CD;font-size:14.5px;line-height:1.85;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#9FB1CD;font-size:14.5px;transition:color .18s ease;}
.footer-links a:hover{color:var(--teal);}
.footer-contact li{color:#9FB1CD;font-size:14.5px;line-height:1.8;margin-bottom:10px;}
.footer-bottom{
  margin-top:48px;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:13.5px;color:#8496B4;
}

/* ============ 底部固定转化条 ============ */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--border);
  box-shadow:0 -10px 30px rgba(15,23,42,.10);
  backdrop-filter:blur(10px);
}
.sticky-bar .container{display:flex;align-items:center;gap:20px;height:72px;}
.sticky-bar .bar-text{font-size:15px;color:#334155;}
.sticky-bar .bar-text b{color:var(--ink);}
.sticky-bar .bar-actions{margin-left:auto;display:flex;gap:12px;}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .mega-panel{width:640px;}
}
@media (max-width:1024px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{gap:16px;height:70px;}
  .hero-body{grid-template-columns:1fr;padding:48px 40px;gap:32px;}
  .kb-grid{grid-template-columns:1fr;gap:28px;}
  .sidebar{position:static;}
  .cta-band{grid-template-columns:1fr;padding:44px 36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  body{font-size:16px;padding-bottom:120px;}
  .container{padding:0 16px;}
  .section{padding:60px 0;}
  .section-tight{padding:44px 0;}
  .hero-body{padding:36px 22px;}
  .faq-group{padding:22px 20px;border-radius:16px;}
  .faq-group > p.group-desc{margin-left:0;}
  .faq-item summary{padding:16px 40px 16px 0;font-size:15.8px;}
  .faq-answer{padding-right:8px;}
  .cta-band{padding:34px 22px;border-radius:20px;}
  .page-hero{border-radius:20px;}
  .sticky-bar .container{height:auto;padding:12px 16px;flex-direction:column;align-items:stretch;gap:10px;}
  .sticky-bar .bar-actions{margin-left:0;}
  .sticky-bar .bar-actions .btn{flex:1;}
  .sticky-bar .bar-text{text-align:center;font-size:14px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .site-footer{padding:48px 0 20px;margin-top:64px;}
}
@media (max-width:520px){
  .header-actions .btn-sm{display:none;}
  .brand-text{font-size:16.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .hero-figure figcaption{position:static;border-radius:0;background:#FBFDFF;}
}