/* roulang page: index */
:root{
  --primary:#1D4ED8;
  --primary-dark:#1E40AF;
  --primary-light:#EAF0FF;
  --accent:#F59E0B;
  --accent-light:#FEF3C7;
  --accent-dark:#B45309;
  --support:#0EA5A4;
  --support-light:#CCFBF1;
  --support-dark:#0F766E;
  --bg:#F5F7FB;
  --block:#F0F4FA;
  --card:#FFFFFF;
  --border:#E3E8F0;
  --line:#EDF1F7;
  --dark:#0F1D3D;
  --title:#131A24;
  --text:#33415C;
  --muted:#5A6B80;
  --weak:#8A98AB;
  --danger:#D92D20;
  --success:#12A150;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:16px;
  --shadow-1:0 1px 2px rgba(19,26,36,.04), 0 8px 24px -10px rgba(29,78,216,.14);
  --shadow-2:0 14px 34px -12px rgba(29,78,216,.22);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow-2);transform:translateY(-2px);}
.btn-primary:active{transform:scale(.98);}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px);}
.btn-outline:active{transform:scale(.98);}
.btn-accent{background:var(--accent);color:var(--title);box-shadow:0 10px 24px -12px rgba(245,158,11,.6);}
.btn-accent:hover{background:#E08C0A;transform:translateY(-2px);}
.btn-accent:active{transform:scale(.98);}
.btn:focus-visible,.link-arrow:focus-visible,.nav-link:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,78,216,.35);border-radius:var(--radius-btn);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;transition:gap .18s ease,color .18s ease;}
.link-arrow::after{content:"\f061";font-family:"Font Awesome 6 Free";font-weight:900;font-size:11px;transition:transform .18s ease;}
.link-arrow:hover{color:var(--primary-dark);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;line-height:1.6;}
.badge-accent{background:var(--accent-light);color:var(--accent-dark);}
.badge-support{background:var(--support-light);color:var(--support-dark);}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px -14px rgba(19,26,36,.35);border-color:var(--border);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px;}
.nav-left,.nav-right{display:flex;align-items:center;gap:26px;flex:1 1 0;}
.nav-right{justify-content:flex-end;gap:22px;}
.nav-link{position:relative;font-size:15px;color:var(--text);font-weight:500;padding:6px 0;transition:color .18s ease;white-space:nowrap;}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:center;transition:transform .2s ease;}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--primary);font-weight:700;}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:4px 8px;border-radius:12px;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:19px;font-weight:800;color:var(--title);letter-spacing:-.3px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--weak);letter-spacing:.4px;}
.nav-cta{padding:10px 18px;font-size:14px;}
.burger{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--border);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.burger span{display:block;width:20px;height:2px;background:var(--title);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
  border-bottom:1px solid var(--border);box-shadow:0 18px 32px -20px rgba(19,26,36,.4);
  padding:8px 24px 20px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-link{display:flex;align-items:center;height:48px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);}
.mobile-panel a.m-link.is-active{color:var(--primary);font-weight:700;}
.mobile-panel .m-cta{margin-top:16px;width:100%;}

main{padding-top:72px;}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);padding:56px 0 64px;border-bottom:1px solid var(--line);}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.hero-copy .badge{margin-bottom:18px;}
.hero-title{font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:800;letter-spacing:-.5px;color:var(--title);margin:0 0 18px;}
.hero-sub{font-size:17px;color:var(--muted);max-width:520px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 22px;}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);}
.trust-item .dot{width:7px;height:7px;border-radius:50%;background:var(--support);flex:0 0 auto;}
.hero-visual{position:relative;border-radius:var(--radius-img);overflow:visible;}
.hero-visual img{
  width:100%;height:340px;object-fit:cover;border-radius:var(--radius-img);
  border:6px solid var(--primary-light);background:var(--primary-light);
}
.float-card{
  position:absolute;right:-10px;bottom:-22px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-card);box-shadow:var(--shadow-2);padding:16px 20px;display:flex;align-items:center;gap:14px;
}
.float-num{font-size:32px;font-weight:800;color:var(--primary);line-height:1;font-variant-numeric:tabular-nums;}
.float-label{font-size:13px;color:var(--muted);line-height:1.5;}

/* ---------- sections ---------- */
.section{padding:80px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:var(--block);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-title{font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;color:var(--title);margin:0 0 10px;}
.sec-desc{font-size:15px;color:var(--muted);max-width:720px;margin:0;}

/* ---------- ladder ---------- */
.ladder{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.ladder::before{
  content:"";position:absolute;top:34px;left:8%;right:8%;border-top:2px dashed #C9D6F5;z-index:0;
}
.ladder-item{
  position:relative;z-index:1;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px 22px;box-shadow:var(--shadow-1);transition:transform .18s ease,box-shadow .18s ease;
}
.ladder-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.ladder-item.lv1{background:#EAF0FF;}
.ladder-item.lv2{background:#DCE6FF;}
.ladder-item.lv3{background:#C7D7FF;}
.ladder-item.lv4{background:var(--primary);border-color:var(--primary);}
.ladder-item.lv4 .ladder-name,.ladder-item.lv4 .ladder-points li{color:#fff;}
.ladder-item.lv4 .ladder-num{color:#fff;}
.ladder-item.lv4 .ladder-cta{color:#fff;}
.ladder-num{font-size:28px;font-weight:800;line-height:1;color:var(--primary);font-variant-numeric:tabular-nums;margin-bottom:12px;display:block;}
.ladder-name{font-size:14px;font-weight:700;color:var(--title);margin:0 0 12px;letter-spacing:.2px;}
.ladder-points{display:flex;flex-direction:column;gap:8px;margin-bottom:18px;}
.ladder-points li{font-size:13px;color:var(--muted);line-height:1.6;padding-left:14px;position:relative;}
.ladder-points li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--support);}
.ladder-cta{display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:700;color:var(--primary);}
.ladder-cta::after{content:"\f061";font-family:"Font Awesome 6 Free";font-weight:900;font-size:10px;transition:transform .18s ease;}
.ladder-item:hover .ladder-cta::after{transform:translateX(3px);}
.ladder-item.lv4 .badge{position:absolute;top:-12px;right:16px;}

/* ---------- plans ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;align-items:start;}
.plan-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:26px 22px;
  box-shadow:var(--shadow-1);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease;
}
.plan-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.plan-card.featured{border:1.5px solid var(--primary);box-shadow:var(--shadow-2);margin-top:-12px;padding-top:34px;position:relative;}
.plan-card.featured .badge{position:absolute;top:-13px;left:22px;}
.plan-name{font-size:17px;font-weight:700;color:var(--title);margin:0 0 12px;}
.plan-price{display:flex;align-items:baseline;gap:6px;margin-bottom:6px;}
.plan-price .p-num{font-size:36px;font-weight:800;color:var(--primary);line-height:1;font-variant-numeric:tabular-nums;}
.plan-price .p-unit{font-size:13px;color:var(--muted);}
.plan-cycle{font-size:13px;color:var(--weak);margin-bottom:20px;}
.plan-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;flex:1;}
.plan-list li{display:flex;align-items:flex-start;gap:9px;font-size:14px;color:var(--text);line-height:1.6;}
.plan-list li i{font-size:13px;margin-top:5px;flex:0 0 auto;}
.plan-list li .ok{color:var(--support-dark);}
.plan-list li .no{color:#C3CBD9;}
.plan-list li.off{color:var(--weak);}
.plan-card .btn{width:100%;}

/* ---------- promo band ---------- */
.promo-band{background:var(--dark);color:#fff;padding:36px 0;}
.promo-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;}
.promo-left{display:flex;align-items:center;gap:24px;flex-wrap:wrap;}
.countdown{display:flex;gap:10px;}
.cd-box{
  width:60px;height:60px;border:1.5px solid var(--accent);border-radius:12px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(245,158,11,.08);
}
.cd-num{font-size:22px;font-weight:800;line-height:1;color:#fff;font-variant-numeric:tabular-nums;}
.cd-label{font-size:11px;color:rgba(255,255,255,.7);margin-top:4px;}
.promo-title{font-size:20px;font-weight:700;margin:0 0 6px;color:#fff;}
.promo-desc{font-size:14px;color:rgba(255,255,255,.72);margin:0;}

/* ---------- post grid ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.post-thumb{position:relative;display:block;background:var(--primary-light);}
.post-thumb img{width:100%;height:180px;object-fit:cover;}
.post-badge{
  position:absolute;top:12px;left:12px;background:var(--primary-light);color:var(--primary);
  font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;
}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.post-title{font-size:17px;font-weight:600;color:var(--title);line-height:1.5;margin:0 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-title a:hover{color:var(--primary);}
.post-excerpt{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--weak);}

/* ---------- empty ---------- */
.empty-state{background:#fff;border:1px dashed var(--border);border-radius:var(--radius-card);padding:48px 24px;text-align:center;}
.empty-icon{
  width:96px;height:96px;border-radius:28px;background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:34px;margin:0 auto 20px;
}
.empty-title{font-size:17px;font-weight:700;color:var(--title);margin:0 0 8px;}
.empty-desc{font-size:14px;color:var(--muted);margin:0;}

/* ---------- form ---------- */
.form-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;}
.info-item{display:flex;gap:14px;margin-bottom:26px;}
.info-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:17px;flex:0 0 auto;
}
.info-title{font-size:16px;font-weight:700;color:var(--title);margin:0 0 6px;}
.info-text{font-size:14px;color:var(--muted);margin:0;}
.form-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:32px;box-shadow:var(--shadow-1);}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field-group{margin-bottom:18px;}
.label{display:block;font-size:14px;font-weight:600;color:var(--title);margin-bottom:8px;}
.field{
  width:100%;height:44px;padding:0 12px;border:1px solid var(--border);border-radius:var(--radius-btn);
  background:#fff;font-size:15px;color:var(--text);font-family:inherit;transition:border-color .18s ease,box-shadow .18s ease;
}
.field::placeholder{color:var(--weak);}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(29,78,216,.18);}
textarea.field{height:auto;min-height:120px;padding:12px;line-height:1.7;resize:vertical;}
select.field{appearance:none;background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%235A6B80' d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:12px;padding-right:36px;}
.checkbox-row{display:flex;align-items:flex-start;gap:9px;margin:6px 0 20px;}
.checkbox-row input{width:16px;height:16px;margin-top:5px;accent-color:var(--primary);flex:0 0 auto;}
.checkbox-row span{font-size:13px;color:var(--muted);line-height:1.7;}
.checkbox-row a{color:var(--primary);font-weight:600;}
.field-error{border-color:var(--danger)!important;}
.error-text{display:none;font-size:13px;color:var(--danger);margin-top:6px;}
.error-text.show{display:block;}
.form-note{font-size:13px;color:var(--weak);margin-top:14px;text-align:center;}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--title);line-height:1.6;
}
.faq-q .faq-icon{
  width:24px;height:24px;border-radius:50%;background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:12px;flex:0 0 auto;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a-inner{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.8;}

/* ---------- cta band ---------- */
.cta-band{background:var(--primary-light);border-radius:var(--radius-card);padding:44px;text-align:center;}
.cta-title{font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--title);margin:0 0 12px;line-height:1.35;}
.cta-desc{font-size:15px;color:var(--muted);max-width:640px;margin:0 auto 26px;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:56px 0 0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-brand .brand-mark{background:#fff;color:var(--dark);}
.foot-brand-name{font-size:18px;font-weight:800;color:#fff;}
.foot-text{font-size:13px;line-height:1.8;color:rgba(255,255,255,.62);margin:0;}
.foot-title{font-size:15px;font-weight:700;color:#fff;margin:0 0 16px;}
.foot-links{display:flex;flex-direction:column;gap:12px;}
.foot-link{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s ease;}
.foot-link:hover{color:#fff;}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;font-size:13px;color:rgba(255,255,255,.55);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-left,.nav-right .nav-link{display:none;}
  .nav-right{flex:0 0 auto;gap:12px;}
  .nav-inner{justify-content:space-between;}
  .brand{order:-1;}
  .burger{display:flex;}
  .nav-cta{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual img{height:290px;}
  .ladder{grid-template-columns:repeat(2,1fr);}
  .ladder::before{display:none;}
  .plan-grid{grid-template-columns:repeat(2,1fr);}
  .plan-card.featured{margin-top:0;}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .form-grid{grid-template-columns:1fr;gap:32px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .promo-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  .wrap{padding:0 18px;}
  .site-header .nav-inner{height:60px;}
  main{padding-top:60px;}
  .brand-name{font-size:16px;}
  .brand-sub{display:none;}
  .hero{padding:36px 0 48px;}
  .section{padding:56px 0;}
  .section.tight{padding:48px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .hero-visual img{height:220px;}
  .float-card{right:10px;bottom:-18px;padding:12px 16px;}
  .float-num{font-size:26px;}
  .post-grid{grid-template-columns:1fr;}
  .plan-grid{grid-template-columns:1fr;}
  .ladder{grid-template-columns:1fr;}
  .field-row{grid-template-columns:1fr;}
  .form-card{padding:22px;}
  .cta-band{padding:32px 20px;}
  .promo-band{padding:28px 0;}
  .cd-box{width:50px;height:50px;}
  .countdown{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;}
  .promo-title{font-size:18px;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:519px){
  .hero-title{font-size:28px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .ladder-item{padding:20px 18px;}
}

/* roulang page: article */
:root{
  --primary:#1D4ED8;
  --primary-dark:#1E40AF;
  --primary-light:#EAF0FF;
  --accent:#F59E0B;
  --accent-light:#FEF3C7;
  --accent-dark:#B45309;
  --support:#0EA5A4;
  --support-light:#CCFBF1;
  --support-dark:#0F766E;
  --bg:#F5F7FB;
  --bg-alt:#F0F4FA;
  --card:#FFFFFF;
  --border:#E3E8F0;
  --line:#EDF1F7;
  --ink:#131A24;
  --text:#33415C;
  --muted:#5A6B80;
  --faint:#8A98AB;
  --dark:#0F1D3D;
  --danger:#D92D20;
  --success:#12A150;
  --r-card:14px;
  --r-btn:10px;
  --shadow-sm:0 1px 2px rgba(19,26,36,.04), 0 8px 24px -10px rgba(29,78,216,.14);
  --shadow-lg:0 14px 34px -12px rgba(29,78,216,.22);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
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;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:0 6px 22px -14px rgba(19,26,36,.35);}
.head-inner{display:flex;align-items:center;gap:28px;height:72px;}
.nav-left{flex:1 1 0;display:flex;align-items:center;gap:26px;}
.nav-right{flex:1 1 0;display:flex;align-items:center;justify-content:flex-end;gap:26px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(150deg,var(--primary),#3B6BEA);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;letter-spacing:-.5px;
  box-shadow:0 6px 16px -8px rgba(29,78,216,.75);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:18px;font-weight:800;color:var(--ink);letter-spacing:-.3px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.6px;}
.nav-link{
  position:relative;font-size:14.5px;color:var(--text);font-weight:500;
  padding:6px 0;white-space:nowrap;transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--primary);font-weight:700;}
.nav-link.active::after{transform:scaleX(1);}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--border);
  border-radius:10px;background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:.22s ease;}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.open span:nth-child(2){opacity:0;}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;}
.mobile-panel.open{display:block;}
.mobile-panel a{
  display:flex;align-items:center;height:48px;padding:0 24px;
  font-size:15px;color:var(--text);border-bottom:1px solid var(--line);
}
.mobile-panel a:hover{background:var(--primary-light);color:var(--primary);}
.mobile-panel .mobile-cta{margin:16px 24px;height:44px;justify-content:center;border-bottom:0;border-radius:10px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1.5px 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:3px solid rgba(29,78,216,.35);outline-offset:2px;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow-lg);transform:translateY(-2px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-ghost:hover{background:var(--primary-light);}
.btn-ghost:active{transform:scale(.98);}
.btn-accent{background:var(--accent);color:var(--ink);}
.btn-accent:hover{background:#E08C08;box-shadow:0 14px 30px -14px rgba(245,158,11,.85);transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.link-more{color:var(--primary);font-size:14.5px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-more i{transition:transform .18s ease;}
.link-more:hover i{transform:translateX(4px);}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--primary-light);color:var(--primary);
}
.badge-accent{background:var(--accent-light);color:var(--accent-dark);}
.badge-support{background:var(--support-light);color:var(--support-dark);}

/* ---------- page head ---------- */
.page-head{
  background:#fff;border-bottom:1px solid var(--border);
  padding:26px 0 34px;
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--faint);margin-bottom:16px;
}
.breadcrumb a{color:var(--muted);transition:color .18s ease;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#CBD5E1;}
.breadcrumb .cur{color:var(--primary);font-weight:600;}
.article-title{
  font-size:clamp(26px,3.6vw,42px);
  line-height:1.32;font-weight:800;letter-spacing:-.5px;
  color:var(--ink);max-width:900px;margin:14px 0 18px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--faint);
}
.article-meta .dot{width:1px;height:12px;background:#D8E0EC;}
.article-meta i{color:var(--faint);font-size:12px;}

/* ---------- article layout ---------- */
.article-main{max-width:880px;margin:0 auto;padding:40px 24px 0;}
.article-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:32px 26px;box-shadow:var(--shadow-sm);
}
.article-cover{border-radius:12px;overflow:hidden;margin-bottom:28px;}
.article-cover img{width:100%;height:auto;aspect-ratio:16/8;object-fit:cover;}
.article-body{font-size:16.5px;line-height:1.85;color:var(--text);}
.article-body p{margin:0 0 18px;}
.article-body h2{
  position:relative;font-size:clamp(21px,2.5vw,26px);font-weight:700;
  color:var(--ink);line-height:1.4;margin:38px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;width:4px;height:18px;
  background:var(--primary);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:600;color:var(--ink);margin:26px 0 12px;}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:22px 0 10px;}
.article-body img{border-radius:12px;margin:24px auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--faint);text-align:center;margin-top:10px;}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 18px;}
.article-body li{margin:8px 0;line-height:1.9;}
.article-body ul li::marker{color:var(--primary);}
.article-body ol li::marker{color:var(--primary);font-weight:700;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--bg);
  border-left:3px solid var(--primary);border-radius:0 10px 10px 0;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(29,78,216,.32);}
.article-body a:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark);}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left;}
.article-body th{background:var(--bg-alt);color:var(--ink);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0;}
.article-body code{background:var(--bg-alt);border-radius:6px;padding:2px 6px;font-size:14px;color:var(--primary-dark);}
.tag-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:34px;padding-top:24px;border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13px;color:var(--faint);}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  font-size:13px;background:var(--bg-alt);color:var(--muted);border:1px solid var(--border);
  transition:.18s ease;
}
.tag:hover{background:var(--primary-light);color:var(--primary);border-color:#D6E0FA;}

/* ---------- empty ---------- */
.empty-state{
  text-align:center;padding:56px 24px;background:#fff;
  border:1px solid var(--border);border-radius:var(--r-card);
}
.empty-icon{
  width:76px;height:76px;margin:0 auto 18px;border-radius:22px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:30px;
}
.empty-title{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.empty-text{font-size:15px;color:var(--muted);margin-bottom:22px;}

/* ---------- related ---------- */
.related-section{padding:56px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.section-head h2{font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--ink);letter-spacing:-.3px;}
.section-head p{font-size:14.5px;color:var(--muted);margin-top:8px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.content-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;flex-direction:column;
}
.content-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#D6E0FA;}
.content-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--primary-light);}
.content-card .thumb img{width:100%;height:100%;object-fit:cover;}
.content-card .thumb .badge{position:absolute;left:12px;top:12px;}
.content-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.content-card h3{font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;margin-bottom:10px;}
.content-card p{
  font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.content-card .meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--faint);
}

/* ---------- cta band ---------- */
.cta-band{padding:64px 0 72px;}
.cta-inner{
  position:relative;overflow:hidden;border-radius:18px;
  padding:44px 40px;
  background:linear-gradient(120deg,#EAF0FF 0%,#F5F7FB 55%,#FEF3C7 100%);
  border:1px solid #DCE4F5;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:rgba(29,78,216,.07);
}
.cta-copy{position:relative;z-index:1;max-width:620px;}
.cta-copy h2{font-size:clamp(22px,2.8vw,30px);font-weight:800;color:var(--ink);letter-spacing:-.4px;margin-bottom:10px;}
.cta-copy p{font-size:15px;color:var(--muted);}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:56px 0 0;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand .brand-mark{background:var(--primary);}
.foot-brand-name{font-size:17px;font-weight:700;color:#fff;}
.foot-text{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:360px;}
.foot-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.foot-links{display:flex;flex-direction:column;gap:11px;}
.foot-link{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s ease;}
.foot-link:hover{color:#fff;}
.foot-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;align-items:center;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-left,.nav-right .nav-link{display:none;}
  .head-inner{height:64px;justify-content:space-between;gap:12px;}
  .nav-right{flex:0 0 auto;}
  .nav-cta{display:none;}
  .burger{display:flex;}
  .brand-sub{display:none;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:767px){
  .wrap{padding:0 16px;}
  .article-main{padding:28px 16px 0;}
  .article-card{padding:22px 16px;border-radius:12px;}
  .article-title{font-size:24px;}
  .page-head{padding:18px 0 26px;}
  .related-section{padding:44px 0 0;}
  .cta-band{padding:48px 0 56px;}
  .cta-inner{padding:30px 22px;border-radius:14px;}
  .cta-actions .btn{width:100%;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:560px){
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .foot-grid{grid-template-columns:minmax(0,1fr);}
  .article-body{font-size:16px;}
  .article-body table{display:block;overflow-x:auto;}
}

/* roulang page: category1 */
:root{
  --primary:#1D4ED8;--primary-dark:#1E40AF;--primary-light:#EAF0FF;
  --accent:#F59E0B;--accent-light:#FEF3C7;--accent-deep:#B45309;
  --support:#0EA5A4;--support-light:#CCFBF1;--support-deep:#0F766E;
  --bg:#F5F7FB;--bg-alt:#F0F4FA;--card:#FFFFFF;
  --border:#E3E8F0;--divider:#EDF1F7;
  --ink:#131A24;--text:#33415C;--muted:#5A6B80;--weak:#8A98AB;
  --danger:#D92D20;--success:#12A150;--dark:#0F1D3D;
  --r-card:14px;--r-btn:10px;--r-input:10px;--r-img:16px;
  --sh:0 1px 2px rgba(19,26,36,.04),0 8px 24px -10px rgba(29,78,216,.14);
  --sh-hover:0 14px 34px -12px rgba(29,78,216,.22);
  --t:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:56px 0}
.section-alt{background:var(--bg-alt)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-light);border-radius:999px;padding:5px 14px;letter-spacing:.2px}
.h1{font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:800;letter-spacing:-.5px;color:var(--ink)}
.h2{font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;color:var(--ink)}
.h3{font-size:20px;line-height:1.4;font-weight:600;color:var(--ink)}
.lead{font-size:17px;color:var(--muted);max-width:760px}
.body-p{font-size:16px;line-height:1.85;color:var(--text);max-width:760px;margin-top:16px}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head p{margin-top:12px;color:var(--muted);font-size:16px}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:70;background:#fff;border-bottom:1px solid var(--divider);transition:box-shadow var(--t)}
.site-header.scrolled{box-shadow:0 6px 22px -14px rgba(19,26,36,.4)}
.header-inner{max-width:1240px;margin:0 auto;padding:0 24px;height:72px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}
.nav-left,.nav-right{display:flex;align-items:center;gap:4px}
.nav-right{justify-content:flex-end}
.nav-link{position:relative;font-size:14.5px;color:var(--text);padding:10px 12px;border-radius:8px;transition:color var(--t);white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--primary);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.brand{display:flex;align-items:center;gap:10px;justify-self:center}
.brand-mark{width:28px;height:28px;border-radius:9px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700;flex:0 0 28px}
.brand-name{display:block;font-size:19px;font-weight:700;color:var(--ink);line-height:1.2;letter-spacing:-.2px;white-space:nowrap}
.brand-sub{display:block;font-size:11px;color:var(--weak);line-height:1.5}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 24px;border-radius:var(--r-btn);border:1.5px solid transparent;font-size:15px;font-weight:600;line-height:1;cursor:pointer;transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 12px 26px -12px rgba(29,78,216,.65);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.98)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-light)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#E08C08;box-shadow:0 12px 26px -14px rgba(245,158,11,.7);transform:translateY(-1px)}
.nav-cta{padding:10px 18px;font-size:14.5px;min-height:40px}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px}
.burger{display:none;width:44px;height:44px;border:0;background:transparent;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;border-radius:10px;margin-left:6px}
.burger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{display:none;background:#fff;border-top:1px solid var(--divider);padding:6px 24px 22px}
.mobile-panel.open{display:block}
.mobile-link{display:flex;align-items:center;height:48px;font-size:15px;color:var(--text);border-bottom:1px solid var(--divider)}
.mobile-link.is-active{color:var(--primary);font-weight:600}
.mobile-cta{width:100%;margin-top:18px}

/* 面包屑 */
.crumb{font-size:13px;color:var(--weak);padding:20px 0 0}
.crumb a{color:var(--weak)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{margin:0 8px;color:#C3CCD9}
.crumb .now{color:var(--primary)}

/* Hero */
.hero{padding:32px 0 60px}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.hero-sub{margin-top:18px;font-size:18px;line-height:1.75;color:var(--muted);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.trust{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--support-deep);background:var(--support-light);border-radius:999px;padding:5px 13px}
.trust.blue{color:var(--primary);background:var(--primary-light)}
.hero-media{position:relative;border-radius:var(--r-img);overflow:visible}
.hero-media-frame{border-radius:var(--r-img);overflow:hidden;border:1px solid #C9D8FF;box-shadow:var(--sh);background:var(--primary-light)}
.hero-media-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.float-card{position:absolute;right:-14px;bottom:-18px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--sh-hover);padding:14px 18px;display:flex;align-items:center;gap:12px}
.float-num{font-size:28px;font-weight:800;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1}
.float-txt{font-size:13px;color:var(--muted);line-height:1.5}

/* 简介条 */
.intro-band{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:28px 32px;box-shadow:var(--sh);display:flex;gap:20px;align-items:flex-start}
.intro-band i{color:var(--primary);font-size:22px;margin-top:6px}
.intro-band p{font-size:16px;color:var(--text);max-width:900px}

/* 图文交替 */
.zigzag{display:flex;flex-direction:column;gap:72px}
.zigzag-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.zigzag-row.reverse .zigzag-media{order:2}
.zigzag-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh);background:var(--primary-light)}
.zigzag-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.zigzag-copy .h3{margin-bottom:4px}
.point-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.point-list li{display:flex;gap:10px;font-size:15px;color:var(--text);align-items:flex-start}
.point-list i{color:var(--primary);margin-top:7px;font-size:12px}
.link-btn{display:inline-flex;align-items:center;gap:6px;margin-top:22px;font-size:15px;font-weight:600;color:var(--primary)}
.link-btn i{transition:transform var(--t);font-size:12px}
.link-btn:hover i{transform:translateX(4px)}
.img-cap{font-size:13px;color:var(--weak);margin-top:10px}

/* 设备卡 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CBD9F8}
.icon-box{width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:grid;place-items:center;font-size:18px;margin-bottom:16px}
.card h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.75}
.badge{display:inline-flex;align-items:center;font-size:13px;font-weight:600;border-radius:999px;padding:4px 10px;background:var(--primary-light);color:var(--primary)}
.badge.accent{background:var(--accent-light);color:var(--accent-deep)}
.badge.support{background:var(--support-light);color:var(--support-deep)}

/* 排查区 */
.check-panel{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:22px}
.check-item{display:flex;gap:14px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px;box-shadow:0 1px 2px rgba(19,26,36,.03)}
.check-item .n{width:26px;height:26px;flex:0 0 26px;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;margin-top:3px}
.check-item h4{font-size:15.5px;font-weight:600;color:var(--ink);margin-bottom:4px}
.check-item p{font-size:14px;color:var(--muted);line-height:1.7}
.media-card{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh)}
.media-card img{width:100%;aspect-ratio:16/12;object-fit:cover}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);margin-bottom:14px;overflow:hidden;transition:border-color var(--t),box-shadow var(--t)}
.faq-item.open{border-color:#C4D5FA;box-shadow:var(--sh)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;padding:14px 22px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer}
.faq-q .ic{width:26px;height:26px;flex:0 0 26px;border-radius:8px;background:var(--primary-light);color:var(--primary);display:grid;place-items:center;font-size:13px;transition:transform var(--t),background var(--t),color var(--t)}
.faq-item.open .faq-q .ic{transform:rotate(180deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* 相关分类胶囊 */
.pill-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:14.5px;color:var(--text);transition:all var(--t)}
.pill:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh)}
.pill.is-current{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

/* CTA 条 */
.cta-band{background:var(--primary-light);border:1px solid #CFDDFB;border-radius:18px;padding:38px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.cta-band h2{font-size:clamp(21px,2.4vw,27px);font-weight:700;color:var(--ink)}
.cta-band p{margin-top:10px;font-size:15.5px;color:var(--muted);max-width:640px}

/* 页脚 */
.site-footer{background:var(--dark);color:#fff;margin-top:8px;padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{background:#fff;color:var(--dark)}
.foot-brand-name{font-size:18px;font-weight:700;color:#fff}
.foot-text{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:340px}
.foot-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-link{font-size:14px;color:rgba(255,255,255,.7);transition:color var(--t)}
a.foot-link:hover{color:#fff}
.foot-bottom{margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.6)}

@media (max-width:1023px){
  .nav-left,.nav-right .nav-link,.nav-cta{display:none}
  .burger{display:inline-flex}
  .header-inner{grid-template-columns:1fr auto;height:60px;gap:8px}
  .brand{justify-self:start}
  .brand-name{font-size:17px}
  .hero-grid,.check-panel{grid-template-columns:1fr;gap:36px}
  .zigzag-row{grid-template-columns:1fr;gap:26px}
  .zigzag-row.reverse .zigzag-media{order:0}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 24px}
}
@media (max-width:640px){
  .section{padding:52px 0}
  .wrap{padding:0 18px}
  .card-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .float-card{position:static;margin-top:14px;right:auto;bottom:auto}
  .hero{padding:20px 0 44px}
  .intro-band{padding:22px;flex-direction:column;gap:12px}
  .zigzag{gap:56px}
  .trust-row{gap:8px}
  .btn{width:100%}
  .hero-actions{flex-direction:column}
  .cta-band .btn{width:100%}
}

/* roulang page: category2 */
:root{
    --primary:#1D4ED8;
    --primary-dark:#1E40AF;
    --primary-light:#EAF0FF;
    --accent:#F59E0B;
    --accent-light:#FEF3C7;
    --accent-text:#B45309;
    --support:#0EA5A4;
    --support-light:#CCFBF1;
    --support-text:#0F766E;
    --bg:#F5F7FB;
    --block:#F0F4FA;
    --card:#FFFFFF;
    --border:#E3E8F0;
    --line:#EDF1F7;
    --text:#131A24;
    --text2:#33415C;
    --muted:#5A6B80;
    --weak:#8A98AB;
    --dark:#0F1D3D;
    --err:#D92D20;
    --ok:#12A150;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --sh:0 1px 2px rgba(19,26,36,.04),0 8px 24px -10px rgba(29,78,216,.14);
    --sh-hover:0 14px 34px -12px rgba(29,78,216,.22);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--text2);
    background:var(--bg);
    overflow-x:hidden;
  }
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}
  img{max-width:100%;display:block;}
  a{text-decoration:none;color:inherit;}
  button,input,select,textarea{font-family:inherit;font-size:inherit;}
  .num{font-variant-numeric:tabular-nums;}

  /* 容器 */
  .wrap{max-width:1200px;margin:0 auto;padding:0 24px;}

  /* 顶部导航 */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 1px 2px rgba(19,26,36,.04);
  }
  .nav-wrap{
    max-width:1200px;margin:0 auto;padding:0 24px;
    display:flex;align-items:center;justify-content:space-between;
    gap:20px;height:72px;
  }
  .nav-left,.nav-right{display:flex;align-items:center;gap:22px;flex:1 1 0;min-width:0;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;
    font-size:14.5px;color:var(--text2);
    padding:8px 2px;white-space:nowrap;
    transition:color .18s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--primary);border-radius:2px;
    transform:scaleX(0);transform-origin:center;
    transition:transform .18s ease;
  }
  .nav-link:hover{color:var(--primary);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--primary);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}

  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:28px;height:28px;border-radius:9px;flex:0 0 28px;
    background:var(--primary);color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-size:15px;font-weight:700;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-name{font-size:19px;font-weight:800;color:var(--text);letter-spacing:-.3px;white-space:nowrap;}
  .brand-sub{font-size:11px;color:var(--weak);letter-spacing:.3px;white-space:nowrap;}

  .burger{
    display:none;width:44px;height:44px;flex:0 0 44px;
    border:1px solid var(--border);background:#fff;border-radius:10px;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
    cursor:pointer;transition:background .18s ease,border-color .18s ease;
  }
  .burger:hover{background:var(--primary-light);border-color:var(--primary-light);}
  .burger span{width:18px;height:2px;background:var(--text2);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
  .burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .burger.is-open span:nth-child(2){opacity:0;}
  .burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .mobile-panel{display:none;background:#fff;border-top:1px solid var(--line);}
  .mobile-panel.is-open{display:block;}
  .mobile-panel a.m-link{
    display:flex;align-items:center;height:48px;padding:0 24px;
    font-size:15px;color:var(--text2);border-bottom:1px solid var(--line);
  }
  .mobile-panel a.m-link.is-active{color:var(--primary);font-weight:600;background:var(--primary-light);}
  .mobile-cta{padding:16px 24px 20px;}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    border:1.5px solid transparent;cursor:pointer;
    transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
  }
  .btn:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;}
  .btn-primary{background:var(--primary);color:#fff;}
  .btn-primary:hover{background:var(--primary-dark);box-shadow:0 12px 26px -12px rgba(29,78,216,.6);transform:translateY(-1px);}
  .btn-primary:active{transform:scale(.98);}
  .btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary);}
  .btn-ghost:hover{background:var(--primary-light);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-accent{background:var(--accent);color:#131A24;}
  .btn-accent:hover{background:#E08E06;box-shadow:0 12px 26px -12px rgba(245,158,11,.7);transform:translateY(-1px);}
  .btn-block{width:100%;}
  .nav-cta{height:40px;padding:0 20px;font-size:14.5px;}

  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--primary);font-size:14.5px;font-weight:600;
  }
  .link-arrow i{transition:transform .18s ease;font-size:12px;}
  .link-arrow:hover i{transform:translateX(4px);}

  /* 面包屑 */
  .crumbs{
    max-width:1200px;margin:0 auto;padding:20px 24px 0;
    font-size:13px;color:var(--weak);display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  }
  .crumbs a{color:var(--weak);}
  .crumbs a:hover{color:var(--primary);}
  .crumbs .cur{color:var(--primary);font-weight:600;}

  /* 区块 */
  .section{padding:56px 0;}
  .section--alt{background:var(--block);}
  .sec-head{max-width:760px;margin-bottom:32px;}
  .sec-head h2{
    font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;color:var(--text);
    margin-top:14px;letter-spacing:-.3px;
  }
  .sec-head p{margin-top:14px;color:var(--muted);font-size:16px;}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    background:var(--primary-light);color:var(--primary);
    border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600;
  }
  .badge-accent{background:var(--accent-light);color:var(--accent-text);}
  .badge-safe{background:var(--support-light);color:var(--support-text);}

  /* Hero */
  .hero{
    background:#fff;
    border-bottom:1px solid var(--line);
    padding:52px 0 64px;
  }
  .hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
  .hero h1{
    font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:800;
    color:var(--text);letter-spacing:-.5px;margin-top:18px;
  }
  .hero h1 em{font-style:normal;color:var(--primary);}
  .hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:var(--muted);max-width:620px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
  .trust-item{
    display:inline-flex;align-items:center;gap:7px;
    font-size:13px;color:var(--text2);
    background:var(--bg);border:1px solid var(--border);
    border-radius:999px;padding:7px 14px;
  }
  .trust-item i{color:var(--support);font-size:12px;}
  .hero-media{position:relative;}
  .hero-media img{
    width:100%;height:340px;object-fit:cover;
    border-radius:16px;border:1px solid var(--primary-light);
  }
  .float-card{
    position:absolute;right:-8px;bottom:-22px;
    background:#fff;border:1px solid var(--border);border-radius:14px;
    box-shadow:var(--sh);padding:16px 20px;min-width:170px;
  }
  .float-card .fc-num{font-size:26px;font-weight:800;color:var(--primary);line-height:1.2;font-variant-numeric:tabular-nums;}
  .float-card .fc-label{font-size:13px;color:var(--muted);margin-top:4px;}

  /* 简介条 */
  .intro-band{background:#fff;padding:40px 0 8px;}
  .intro-box{
    display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:flex-start;
    background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:24px;
  }
  .intro-box i{color:var(--primary);font-size:22px;margin-top:4px;}
  .intro-box p{font-size:16px;color:var(--text2);max-width:760px;}

  /* 要点卡 */
  .pcard{
    display:flex;gap:16px;align-items:flex-start;
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--r-card);padding:22px;box-shadow:var(--sh);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .pcard:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D5DFF2;}
  .pcard-ico{
    flex:0 0 46px;width:46px;height:46px;border-radius:12px;
    background:var(--primary-light);color:var(--primary);
    display:flex;align-items:center;justify-content:center;font-size:18px;
  }
  .pcard-title{font-size:17px;font-weight:600;color:var(--text);line-height:1.4;}
  .pcard-text{margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted);}

  /* 侧栏 */
  .side-card{
    background:#fff;border:1px solid var(--border);border-radius:14px;
    padding:22px;box-shadow:var(--sh);margin-bottom:20px;
  }
  .side-title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:14px;}
  .side-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:11px 0;border-bottom:1px dashed var(--line);
    font-size:14.5px;color:var(--text2);transition:color .18s ease;
  }
  .side-link:last-child{border-bottom:0;padding-bottom:0;}
  .side-link span{font-size:12px;color:var(--weak);font-variant-numeric:tabular-nums;}
  .side-link:hover{color:var(--primary);}
  .side-cta{background:var(--primary-light);border-color:#D6E1FF;}
  .side-cta p{font-size:14px;color:var(--text2);line-height:1.75;margin-bottom:16px;}
  .side-cta .side-title{margin-bottom:10px;}

  @media (min-width:1024px){
    .side{position:sticky;top:92px;}
  }

  /* 设备对照 */
  .media-card{
    border-radius:16px;overflow:hidden;border:1px solid var(--border);
    box-shadow:var(--sh);background:#fff;
  }
  .media-card img{width:100%;height:360px;object-fit:cover;}
  .device-list{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
  .device-row{
    display:flex;align-items:flex-start;gap:14px;
    background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px;
    transition:transform .18s ease,box-shadow .18s ease;
  }
  .device-row:hover{transform:translateY(-2px);box-shadow:var(--sh);}
  .device-row i{color:var(--primary);font-size:16px;margin-top:4px;width:20px;text-align:center;}
  .device-row h3{font-size:15px;font-weight:600;color:var(--text);}
  .device-row p{font-size:14px;color:var(--muted);margin-top:4px;line-height:1.7;}

  /* FAQ */
  .faq-list{max-width:880px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:14px;
    margin-bottom:14px;overflow:hidden;box-shadow:var(--sh);
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .faq-item.open{border-color:#D5DFF2;box-shadow:var(--sh-hover);}
  .faq-q{
    width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:16px 22px;background:none;border:0;cursor:pointer;
    font-size:16px;font-weight:600;color:var(--text);text-align:left;line-height:1.5;
  }
  .faq-q:focus-visible{outline:3px solid rgba(29,78,216,.28);outline-offset:-3px;}
  .faq-ico{
    flex:0 0 26px;width:26px;height:26px;border-radius:999px;
    background:var(--primary-light);color:var(--primary);
    display:flex;align-items:center;justify-content:center;
    font-size:12px;transition:transform .22s ease,background .22s ease;
  }
  .faq-item.open .faq-ico{background:var(--primary);color:#fff;transform:rotate(180deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
  .faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--muted);}

  /* 相关分类 */
  .cat-strip{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;}
  .pill{
    display:inline-flex;align-items:center;gap:8px;
    height:44px;padding:0 20px;border-radius:999px;
    background:#fff;border:1px solid var(--border);
    font-size:14.5px;color:var(--text2);font-weight:600;
    transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
  }
  .pill i{font-size:12px;color:var(--primary);}
  .pill:hover{background:var(--primary-light);border-color:var(--primary-light);color:var(--primary);transform:translateY(-2px);}

  /* CTA 条 */
  .cta-band{background:var(--primary-light);border-top:1px solid #DAE4FF;border-bottom:1px solid #DAE4FF;}
  .cta-inner{
    display:flex;align-items:center;justify-content:space-between;gap:32px;
    padding:44px 0;flex-wrap:wrap;
  }
  .cta-inner h2{font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--text);line-height:1.35;letter-spacing:-.3px;}
  .cta-inner p{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px;}

  /* 页脚 */
  .site-footer{background:var(--dark);color:#fff;padding:56px 0 0;margin-top:0;}
  .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
  .foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .foot-brand .brand-mark{background:var(--primary);}
  .foot-brand-name{font-size:18px;font-weight:700;color:#fff;}
  .foot-text{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:360px;}
  .foot-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
  .foot-links{display:flex;flex-direction:column;gap:12px;}
  .foot-link{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s ease;}
  .foot-link:hover{color:#fff;}
  .foot-bottom{
    margin-top:44px;padding:20px 0;
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.55);
  }

  /* 响应式 */
  @media (max-width:1023px){
    .nav-wrap{height:60px;gap:12px;}
    .nav-left{display:none;}
    .nav-right{flex:0 0 auto;}
    .nav-right .nav-link,.nav-right .nav-cta{display:none;}
    .burger{display:flex;}
    .brand-name{font-size:17px;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .hero-media img{height:280px;}
    .float-card{position:static;margin-top:16px;display:inline-block;}
    .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  }
  @media (max-width:767px){
    .wrap{padding:0 16px;}
    .nav-wrap{padding:0 16px;}
    .crumbs{padding:16px 16px 0;}
    .section{padding:48px 0;}
    .hero{padding:36px 0 48px;}
    .brand-sub{display:none;}
    .intro-box{grid-template-columns:1fr;gap:12px;padding:20px;}
    .media-card img{height:240px;}
    .cta-inner{padding:36px 0;}
    .foot-grid{grid-template-columns:1fr;}
    .foot-bottom{flex-direction:column;gap:8px;}
    .hero-actions .btn{width:100%;}
  }
  @media (max-width:520px){
    .hero h1{font-size:28px;}
    .pcard{padding:18px;gap:14px;}
    .pcard-ico{flex:0 0 40px;width:40px;height:40px;font-size:16px;border-radius:10px;}
    .pill{width:100%;justify-content:center;}
  }

/* roulang page: category3 */
:root{
  --primary:#1D4ED8;
  --primary-dark:#1E40AF;
  --primary-soft:#EAF0FF;
  --accent:#F59E0B;
  --accent-soft:#FEF3C7;
  --accent-deep:#B45309;
  --support:#0EA5A4;
  --support-soft:#CCFBF1;
  --support-deep:#0F766E;
  --error:#D92D20;
  --success:#12A150;
  --bg:#F5F7FB;
  --bg-alt:#F0F4FA;
  --card:#FFFFFF;
  --line:#E3E8F0;
  --line-soft:#EDF1F7;
  --ink:#131A24;
  --text:#33415C;
  --muted:#5A6B80;
  --faint:#8A98AB;
  --dark:#0F1D3D;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(19,26,36,.04), 0 8px 24px -10px rgba(29,78,216,.14);
  --shadow-hover:0 14px 34px -12px rgba(29,78,216,.22);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.3;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(19,26,36,.03);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  min-height:72px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:4px;}
.nav-right{justify-content:flex-end;gap:8px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 10px;
  font-size:14.5px;
  color:var(--text);
  border-radius:8px;
  white-space:nowrap;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;left:10px;right:10px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--primary);font-weight:700;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-link:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;}

.brand{
  display:flex;align-items:center;gap:10px;
  justify-self:center;
  color:var(--ink);
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:10px;
  background:var(--primary);color:#fff;
  font-weight:800;font-size:17px;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:18px;font-weight:800;letter-spacing:-.3px;color:var(--ink);}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.2px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 24px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-sm);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.btn:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:var(--shadow-hover);transform:translateY(-1px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark);}
.btn-ghost:active{transform:scale(.98);}
.btn-accent{background:var(--accent);color:var(--ink);}
.btn-accent:hover{background:#E08C05;color:var(--ink);box-shadow:0 12px 26px -12px rgba(245,158,11,.6);transform:translateY(-1px);}
.btn-accent:active{transform:scale(.98);}
.nav-cta{padding:10px 18px;font-size:14px;}

.burger{
  display:none;
  width:44px;height:44px;flex-direction:column;
  justify-content:center;align-items:center;gap:5px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  cursor:pointer;
}
.burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--ease),opacity var(--ease);}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.open span:nth-child(2){opacity:0;}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line-soft);}
.mobile-panel.open{display:block;}
.mobile-panel .m-link{
  display:flex;align-items:center;
  min-height:48px;padding:0 24px;
  font-size:15px;color:var(--text);
  border-bottom:1px solid var(--line-soft);
}
.mobile-panel .m-link:hover{background:var(--primary-soft);color:var(--primary);}
.mobile-panel .m-link.is-active{color:var(--primary);font-weight:700;}
.mobile-panel .m-cta{display:block;margin:16px 24px 20px;text-align:center;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-size:13px;color:var(--faint);
  display:flex;align-items:center;gap:8px;justify-content:center;
  flex-wrap:wrap;
  margin-bottom:22px;
}
.breadcrumb a{color:var(--faint);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .cur{color:var(--primary);font-weight:600;}

/* ---------- Hero（纯文字居中） ---------- */
.hero-plain{
  position:relative;
  padding:64px 0 60px;
  background:#fff;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.hero-plain::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.11;
}
.hero-plain>.wrap{position:relative;}
.hero-inner{max-width:820px;margin:0 auto;text-align:center;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;
}
.badge-support{background:var(--support-soft);color:var(--support-deep);}
.badge-accent{background:var(--accent-soft);color:var(--accent-deep);}
.hero-inner h1{
  font-size:clamp(30px,4.4vw,46px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.5px;
  margin:20px 0 18px;
}
.hero-lead{
  font-size:17px;color:var(--muted);
  max-width:680px;margin:0 auto 28px;
}
.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-marks{display:flex;justify-content:center;flex-wrap:wrap;gap:10px 26px;font-size:14px;color:var(--muted);}
.hero-marks li{display:flex;align-items:center;gap:8px;}
.dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--support);flex:0 0 auto;
}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0;}
.section-alt{background:var(--bg-alt);}
.section-white{background:#fff;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-title{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.3px;margin-bottom:12px;}
.section-sub{font-size:16px;color:var(--muted);margin:0;}

/* ---------- 流程步骤条 ---------- */
.steps{
  position:relative;
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
  padding-top:56px;
}
.steps::before{
  content:"";
  position:absolute;top:20px;left:8%;right:8%;height:2px;
  background:repeating-linear-gradient(90deg,#C9D6F5 0 8px,transparent 8px 16px);
}
.step{
  position:relative;z-index:1;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 20px;
  box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.step-num{
  position:absolute;top:-48px;left:20px;
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--primary-soft);
  color:var(--primary);
  font-weight:800;font-size:15px;
  border:2px solid #fff;
  box-shadow:0 0 0 2px var(--primary-soft);
}
.step:last-child .step-num{background:var(--accent-soft);color:var(--accent-deep);box-shadow:0 0 0 2px var(--accent-soft);}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.75;margin:0;}

/* ---------- 半宽图文卡 ---------- */
.half-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.half-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease);
}
.half-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.half-card figure{margin:0;position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--primary-soft);}
.half-card figure img{width:100%;height:100%;object-fit:cover;}
.half-card .half-body{padding:24px;flex:1;display:flex;flex-direction:column;}
.half-card h3{font-size:19px;font-weight:600;margin-bottom:10px;}
.half-card p{font-size:15px;color:var(--muted);margin-bottom:16px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--primary);
  margin-top:auto;
}
.text-link::after{content:"→";transition:transform var(--ease);}
.text-link:hover::after{transform:translateX(4px);}

/* ---------- 要点清单 ---------- */
.notes{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.note{
  display:flex;gap:16px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.note:hover{border-color:#C9D6F5;box-shadow:var(--shadow-hover);}
.note-idx{
  flex:0 0 auto;
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);
  font-weight:800;font-size:14px;
}
.note h3{font-size:16.5px;font-weight:600;margin-bottom:6px;}
.note p{margin:0;font-size:14.5px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{max-width:920px;margin:0 auto;}
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item.open{border-color:#C9D6F5;box-shadow:var(--shadow);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;min-height:56px;
  padding:8px 22px;
  background:none;border:0;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);
  text-align:left;
}
.faq-q:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:-3px;}
.faq-sign{position:relative;width:18px;height:18px;flex:0 0 auto;transition:transform var(--ease);}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--primary);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-sign::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-sign::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.open .faq-sign{transform:rotate(180deg);}
.faq-item.open .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.faq-item.open .faq-a{max-height:420px;}
.faq-a p{padding:0 22px 20px;margin:0;font-size:15px;color:var(--muted);}

/* ---------- 相关分类 ---------- */
.pills{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.pill{
  display:inline-flex;align-items:center;
  padding:11px 20px;
  border-radius:999px;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:14px;font-weight:600;
  border:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),transform var(--ease);
}
.pill:hover{background:#fff;border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--primary-soft);
  border:1px solid #D7E1FF;
  border-radius:20px;
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);font-weight:700;margin-bottom:8px;}
.cta-band p{margin:0;color:var(--muted);font-size:15.5px;max-width:620px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);margin-top:8px;}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding:56px 0 32px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand-name{color:#fff;font-size:17px;font-weight:800;}
.site-footer .brand-mark{background:#fff;color:var(--dark);}
.foot-text{font-size:14px;color:rgba(255,255,255,.6);line-height:1.8;margin:0;max-width:360px;}
.foot-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;}
.foot-links{display:flex;flex-direction:column;gap:2px;}
.foot-link{display:block;color:rgba(255,255,255,.7);font-size:14px;padding:4px 0;transition:color var(--ease);}
.foot-link:hover{color:#fff;}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .header-inner{display:flex;justify-content:space-between;align-items:center;min-height:60px;gap:12px;}
  .brand{order:-1;justify-self:start;}
  .brand-name{font-size:16.5px;}
  .brand-sub{display:none;}
  .nav-left{display:none;}
  .nav-right .nav-link,.nav-right .nav-cta{display:none;}
  .burger{display:inline-flex;}
  .section{padding:56px 0;}
  .steps{grid-template-columns:repeat(2,1fr);gap:18px;padding-top:48px;}
  .steps::before{display:none;}
  .step-num{top:-42px;}
  .half-cards{grid-template-columns:1fr;}
  .notes{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 24px;}
}
@media (min-width:1024px){
  .mobile-panel{display:none !important;}
}
@media (max-width:639px){
  .wrap{padding:0 16px;}
  .hero-plain{padding:44px 0 44px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .steps{grid-template-columns:1fr;}
  .section{padding:48px 0;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}

/* roulang page: category4 */
:root{
    --primary:#1D4ED8;
    --primary-dark:#1E40AF;
    --primary-light:#EAF0FF;
    --accent:#F59E0B;
    --accent-light:#FEF3C7;
    --accent-deep:#B45309;
    --support:#0EA5A4;
    --support-light:#CCFBF1;
    --support-deep:#0F766E;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --surface-alt:#F0F4FA;
    --border:#E3E8F0;
    --line:#EDF1F7;
    --ink:#131A24;
    --text:#33415C;
    --muted:#5A6B80;
    --faint:#8A98AB;
    --deep:#0F1D3D;
    --danger:#D92D20;
    --success:#12A150;
    --radius-card:14px;
    --radius-btn:10px;
    --radius-img:16px;
    --shadow-soft:0 1px 2px rgba(19,26,36,.04), 0 8px 24px -10px rgba(29,78,216,.14);
    --shadow-hover:0 14px 34px -12px rgba(29,78,216,.22);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:var(--bg);
    overflow-x:hidden;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
  ul,ol{list-style:none;}
  a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;}
  .num{font-variant-numeric:tabular-nums;}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  @media (max-width:640px){ .wrap{padding:0 16px;} }

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:#fff;
    border-bottom:1px solid var(--border);
    transition:box-shadow .2s ease;
  }
  .site-header.scrolled{box-shadow:0 6px 22px -14px rgba(19,26,36,.32);}
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    height:72px;gap:16px;
  }
  .nav-left,.nav-right{display:flex;align-items:center;gap:22px;flex:1 1 0;min-width:0;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;
    font-size:14.5px;
    color:var(--text);
    white-space:nowrap;
    padding:6px 0;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
    background:var(--primary);border-radius:2px;
    transform:scaleX(0);transform-origin:center;
    transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--primary);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--primary);font-weight:700;}
  .nav-link.active::after{transform:scaleX(1);}
  .brand{
    display:flex;align-items:center;gap:10px;
    flex:0 0 auto;
    padding:4px 8px;
    border-radius:12px;
  }
  .brand-mark{
    width:28px;height:28px;border-radius:9px;
    background:var(--primary);color:#fff;
    display:grid;place-items:center;
    font-size:15px;font-weight:700;
    flex:0 0 auto;
  }
  .brand-txt{display:flex;flex-direction:column;line-height:1.15;}
  .brand-name{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:-.3px;white-space:nowrap;}
  .brand-sub{font-size:11px;color:var(--faint);white-space:nowrap;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;
    padding:12px 24px;
    border:1.5px solid transparent;
    cursor:pointer;
    transition:all .18s ease;
    min-height:44px;
    line-height:1.2;
  }
  .btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
  .btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);box-shadow:var(--shadow-hover);}
  .btn-primary:active{transform:scale(.98);}
  .btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);}
  .btn-outline:hover{background:var(--primary-light);}
  .btn-accent{background:var(--accent);color:var(--ink);border-color:var(--accent);}
  .btn-accent:hover{background:#E08C08;border-color:#E08C08;box-shadow:var(--shadow-hover);}
  .btn:focus-visible,a:focus-visible,button:focus-visible{
    outline:none;box-shadow:0 0 0 3px rgba(29,78,216,.35);
  }
  .nav-cta{padding:10px 20px;font-size:14.5px;}
  .burger{
    display:none;
    width:44px;height:44px;
    background:#fff;border:1px solid var(--border);border-radius:10px;
    padding:0;cursor:pointer;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
  }
  .burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
  .burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .burger.open span:nth-child(2){opacity:0;}
  .burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .mobile-panel{
    display:none;
    background:#fff;
    border-top:1px solid var(--line);
    box-shadow:0 18px 30px -20px rgba(19,26,36,.4);
  }
  .mobile-panel.open{display:block;}
  .mobile-panel a{
    display:flex;align-items:center;
    min-height:48px;padding:0 24px;
    font-size:15px;color:var(--text);
    border-bottom:1px solid var(--line);
  }
  .mobile-panel a.active{color:var(--primary);font-weight:700;background:var(--primary-light);}
  .mobile-panel .m-cta{
    margin:16px 24px 20px;justify-content:center;
    background:var(--primary);color:#fff;border-radius:var(--radius-btn);
    border-bottom:0;font-weight:600;
  }
  @media (max-width:1023px){
    .nav-left,.nav-right .nav-link,.nav-right .nav-cta{display:none;}
    .nav-right{flex:0 0 auto;}
    .burger{display:flex;}
    .brand-name{font-size:16px;}
    .brand-sub{display:none;}
    .header-inner{height:60px;}
  }

  /* ---------- breadcrumb ---------- */
  .crumb{
    border-bottom:1px solid var(--line);
    background:#fff;
  }
  .crumb-inner{
    display:flex;align-items:center;gap:8px;
    font-size:13px;color:var(--faint);
    height:46px;flex-wrap:wrap;
  }
  .crumb-inner a:hover{color:var(--primary);}
  .crumb-sep{color:#C3CDDB;}
  .crumb-current{color:var(--primary);font-weight:600;}

  /* ---------- hero ---------- */
  .hero-center{
    position:relative;
    padding:72px 0 68px;
    text-align:center;
    background:
      linear-gradient(180deg, rgba(245,247,251,.93), rgba(245,247,251,.99)),
      url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-bottom:1px solid var(--border);
  }
  .pill{
    display:inline-flex;align-items:center;gap:6px;
    background:var(--primary-light);color:var(--primary);
    font-size:13px;font-weight:600;
    padding:5px 14px;border-radius:999px;
  }
  .hero-center h1{
    margin-top:20px;
    font-size:clamp(30px,4.4vw,46px);
    line-height:1.25;
    font-weight:800;
    letter-spacing:-.5px;
    color:var(--ink);
  }
  .hero-sub{
    max-width:760px;margin:18px auto 0;
    font-size:17px;line-height:1.85;color:var(--muted);
  }
  .hero-actions{
    display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
    margin-top:30px;
  }
  .trust-row{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:center;
    margin-top:28px;
  }
  .trust-item{
    display:inline-flex;align-items:center;gap:8px;
    background:#fff;border:1px solid var(--border);border-radius:999px;
    padding:7px 16px;font-size:13.5px;color:var(--text);
  }
  .trust-item i{color:var(--support);font-size:13px;}

  /* ---------- sections ---------- */
  .section{padding:64px 0;}
  .section.alt{background:var(--surface-alt);}
  .section-head{max-width:760px;}
  .section-head.center{margin:0 auto;text-align:center;}
  .eyebrow{
    display:inline-block;
    font-size:13px;font-weight:600;color:var(--primary);
    background:var(--primary-light);border-radius:999px;padding:4px 12px;
  }
  .section-head h2{
    margin-top:14px;
    font-size:clamp(24px,3vw,32px);
    line-height:1.3;font-weight:700;color:var(--ink);
    letter-spacing:-.3px;
  }
  .section-head p{margin-top:14px;font-size:16px;color:var(--muted);}
  @media (max-width:640px){ .section{padding:52px 0;} }

  /* ---------- stat strip ---------- */
  .stat-strip{
    display:grid;grid-template-columns:repeat(4,1fr);
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    box-shadow:var(--shadow-soft);
    overflow:hidden;
  }
  .stat-cell{
    padding:26px 22px;
    border-right:1px solid var(--line);
  }
  .stat-cell:last-child{border-right:0;}
  .stat-num{
    font-size:30px;font-weight:800;color:var(--primary);
    line-height:1.1;letter-spacing:-.5px;
  }
  .stat-num span{font-size:15px;font-weight:600;margin-left:3px;color:var(--primary);}
  .stat-label{margin-top:8px;font-size:14px;color:var(--muted);}
  @media (max-width:900px){
    .stat-strip{grid-template-columns:repeat(2,1fr);}
    .stat-cell:nth-child(2){border-right:0;}
    .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
  }
  @media (max-width:520px){
    .stat-cell{padding:20px 16px;}
    .stat-num{font-size:25px;}
  }

  /* ---------- icon grid ---------- */
  .icon-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
    margin-top:36px;
  }
  .icon-cell{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    padding:24px;
    box-shadow:var(--shadow-soft);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .icon-cell:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D5DEF0;}
  .icon-badge{
    width:40px;height:40px;border-radius:12px;
    background:var(--primary-light);color:var(--primary);
    display:grid;place-items:center;font-size:17px;
  }
  .icon-cell h3{
    margin-top:16px;font-size:17px;font-weight:600;color:var(--ink);
  }
  .icon-cell p{
    margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--muted);
  }
  @media (max-width:1023px){ .icon-grid{grid-template-columns:repeat(2,1fr);} }
  @media (max-width:640px){ .icon-grid{grid-template-columns:1fr;gap:16px;} }

  /* ---------- wide feature card ---------- */
  .feature-wide{
    display:grid;grid-template-columns:1fr 1fr;
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    box-shadow:var(--shadow-soft);overflow:hidden;
    margin-top:36px;
  }
  .feature-media{
    min-height:100%;
    background:var(--primary-light);
  }
  .feature-media img{
    width:100%;height:100%;min-height:320px;object-fit:cover;
  }
  .feature-body{padding:40px;}
  .feature-body h3{
    font-size:22px;font-weight:700;color:var(--ink);
  }
  .feature-body p{margin-top:14px;font-size:15.5px;color:var(--muted);}
  .feature-list{margin-top:20px;display:grid;gap:12px;}
  .feature-list li{
    display:flex;gap:10px;align-items:flex-start;
    font-size:15px;color:var(--text);
  }
  .feature-list i{color:var(--primary);margin-top:5px;font-size:13px;}
  @media (max-width:900px){
    .feature-wide{grid-template-columns:1fr;}
    .feature-media img{min-height:220px;}
    .feature-body{padding:26px;}
  }

  /* ---------- faq ---------- */
  .faq-list{margin-top:32px;display:grid;gap:14px;max-width:900px;margin-left:auto;margin-right:auto;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    box-shadow:var(--shadow-soft);overflow:hidden;
  }
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:56px;padding:14px 22px;
    background:none;border:0;cursor:pointer;text-align:left;
    font-size:15.5px;font-weight:600;color:var(--ink);
  }
  .faq-q:hover{color:var(--primary);}
  .faq-sign{
    flex:0 0 auto;width:26px;height:26px;border-radius:8px;
    background:var(--primary-light);color:var(--primary);
    display:grid;place-items:center;font-size:13px;
    transition:transform .22s ease,background-color .22s ease;
  }
  .faq-item.open .faq-sign{transform:rotate(180deg);}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .28s ease;
  }
  .faq-a p{
    padding:0 22px 20px;
    font-size:15px;line-height:1.8;color:var(--muted);
  }

  /* ---------- related tags ---------- */
  .related-bar{
    display:flex;flex-wrap:wrap;gap:12px;
    margin-top:30px;
  }
  .tag-pill{
    display:inline-flex;align-items:center;gap:8px;
    background:#fff;border:1px solid var(--border);border-radius:999px;
    padding:10px 20px;font-size:14.5px;color:var(--text);
    transition:all .18s ease;
  }
  .tag-pill:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);}
  .tag-pill.current{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600;}

  /* ---------- cta ---------- */
  .cta-band{
    background:var(--primary-light);
    border-top:1px solid var(--border);
    border-bottom:1px solid var(--border);
    padding:56px 0;
  }
  .cta-inner{
    display:flex;align-items:center;justify-content:space-between;gap:28px;
    flex-wrap:wrap;
  }
  .cta-inner h2{
    font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--ink);line-height:1.35;
  }
  .cta-inner p{margin-top:10px;font-size:15.5px;color:var(--muted);max-width:640px;}

  /* ---------- footer ---------- */
  .site-footer{background:var(--deep);color:rgba(255,255,255,.72);padding:56px 0 0;}
  .foot-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
    padding-bottom:36px;
  }
  .foot-brand{display:flex;align-items:center;gap:10px;}
  .foot-brand .brand-mark{background:#fff;color:var(--deep);}
  .foot-brand-name{font-size:18px;font-weight:800;color:#fff;letter-spacing:-.3px;}
  .foot-text{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:360px;}
  .foot-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
  .foot-links{display:grid;gap:11px;}
  .foot-link{font-size:14px;color:rgba(255,255,255,.7);}
  a.foot-link:hover{color:#fff;}
  .foot-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    border-top:1px solid rgba(255,255,255,.12);
    padding:20px 0 26px;
    font-size:13px;color:rgba(255,255,255,.6);
  }
  @media (max-width:900px){
    .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  }
  @media (max-width:640px){
    .foot-grid{grid-template-columns:1fr;gap:28px;}
    .foot-bottom{flex-direction:column;gap:8px;}
  }