/* roulang page: index */
:root{
  --brand-50:#EEF3FE;--brand-100:#DCE6FD;--brand-200:#BDD0FA;--brand-500:#3A6BE8;--brand-600:#2554D6;--brand-700:#1B3FA8;
  --orange-50:#FFF3E8;--orange-500:#FF7A1A;--orange-600:#E9650A;
  --teal-50:#E7F7F4;--teal-500:#12A594;
  --danger:#E5484D;
  --ink:#0F172A;--text:#334155;--muted:#64748B;--border:#E2E8F0;--divider:#F1F5F9;--bg:#FFFFFF;--bg-alt:#F7F9FC;
  --r-card:16px;--r-img:12px;--r-btn:10px;--r-pill:999px;--r-block:24px;
  --shadow-1:0 1px 2px rgba(15,23,42,.05);
  --shadow-2:0 10px 24px -12px rgba(15,23,42,.18);
  --shadow-brand:0 16px 32px -16px rgba(37,84,214,.35);
  --container:1200px;
}
*,*::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","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;font-variant-numeric:tabular-nums;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:.2px;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-tight{padding-top:0}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--brand-600);letter-spacing:.6px;margin-bottom:10px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:30px;font-weight:700}
.section-sub{font-size:15px;color:var(--muted);margin-top:10px;max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600)}
.text-link .arrow{transition:transform .2s}
.text-link:hover .arrow{transform:translateX(2px)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);transition:box-shadow .25s ease,background .25s ease}
.site-header.is-scrolled{box-shadow:var(--shadow-1);background:rgba(255,255,255,.96)}
.nav-grid{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;height:72px}
.nav-side{display:flex;align-items:center;gap:6px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;font-size:15px;font-weight:500;color:var(--text);border-radius:8px;transition:color .2s,background .2s}
.nav-link:hover{color:var(--brand-600);background:var(--brand-50)}
.nav-link.is-active{color:var(--brand-600);font-weight:700}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand-600)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;font-weight:800;font-size:18px;box-shadow:var(--shadow-brand)}
.brand-text{font-size:17px;font-weight:800;letter-spacing:.2px;white-space:nowrap}
.nav-cta{height:40px;padding:0 18px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:10px;background:#fff;align-items:center;justify-content:center;cursor:pointer;justify-self:end}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--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(--ink);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-panel{display:none;border-top:1px solid var(--border);background:#fff}
.mobile-panel.is-open{display:block;animation:panelIn .18s ease both}
@keyframes panelIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.mobile-panel a.m-row{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 20px;font-size:15px;color:var(--text);border-bottom:1px solid var(--divider)}
.mobile-panel a.m-row:hover{background:var(--brand-50);color:var(--brand-600)}
.m-panel-cta{padding:16px 20px 22px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none!important}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{background:#1F49C0;color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.2)}
.btn-promo{background:var(--orange-500);color:#fff}
.btn-promo:hover{background:var(--orange-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(233,101,10,.8)}
.btn-promo:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.2)}
.btn-ghost{background:#fff;border-color:var(--brand-200);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-plain{background:transparent;color:var(--brand-600)}
.btn-plain:hover{background:var(--brand-50)}
.btn-pill{border-radius:var(--r-pill)}
.btn-block{width:100%}

/* badges */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 11px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1.7}
.badge-orange{background:var(--orange-50);color:var(--orange-600)}
.badge-brand{background:var(--brand-50);color:var(--brand-600)}
.badge-teal{background:var(--teal-50);color:var(--teal-500)}
.badge-gray{background:var(--divider);color:#475569}

/* hero */
.hero{position:relative;overflow:hidden;background:#fff;padding:72px 0 88px}
.hero::before{content:"";position:absolute;right:-160px;top:-120px;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(58,107,232,.08),rgba(58,107,232,0) 70%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.hero-copy{grid-column:span 6}
.hero-visual{grid-column:span 6;position:relative}
.hero h1{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.25}
.hero-sub{font-size:17px;color:var(--muted);margin-top:18px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:30px;padding-top:24px;border-top:1px solid var(--divider)}
.hero-trust li{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:7px}
.hero-trust b{font-size:15px;color:var(--ink);font-weight:800}
.dot{width:7px;height:7px;border-radius:50%;background:var(--teal-500);display:inline-block}
.hero-img{width:100%;border-radius:var(--r-card);box-shadow:var(--shadow-2);aspect-ratio:16/11;object-fit:cover}
.hero-float{position:absolute;left:-24px;bottom:-28px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-2);padding:16px 18px;min-width:268px}
.hero-float p{font-size:13px;color:var(--muted);margin:8px 0 10px}
.cd-row{display:flex;gap:8px}
.cd-block{min-width:54px;padding:8px 10px;background:#fff;border:1px solid var(--border);border-radius:10px;text-align:center;box-shadow:var(--shadow-1)}
.cd-num{font-size:22px;font-weight:800;color:var(--orange-500);line-height:1.15}
.cd-label{font-size:11px;color:var(--muted);margin-top:2px}

/* trust bar */
.trust-bar{border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);background:#fff}
.trust-list{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-item{padding:28px 24px;border-right:1px solid var(--divider)}
.trust-item:last-child{border-right:0}
.trust-item b{display:block;font-size:24px;font-weight:800;color:var(--brand-600)}
.trust-item span{font-size:14px;color:var(--muted);display:block;margin-top:4px}

/* tiers */
.tier-stack{position:relative}
.tier-stack::before{content:"";position:absolute;left:26px;top:20px;bottom:20px;width:2px;background:var(--brand-100);z-index:0}
.tier{position:relative;z-index:1;display:grid;grid-template-columns:52px 1fr auto;gap:22px;align-items:flex-start;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.tier:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200)}
.tier+.tier{margin-top:20px}
.tier:nth-child(1){margin-right:140px}
.tier:nth-child(2){margin-right:96px}
.tier:nth-child(3){margin-right:48px}
.tier-index{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--brand-50);color:var(--brand-600);font-size:19px;font-weight:800;border:2px solid #fff;box-shadow:var(--shadow-1)}
.tier h3{font-size:19px;font-weight:700}
.tier .tier-for{font-size:13px;color:var(--muted);margin-top:4px}
.tier-points{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:14px}
.tier-points li{font-size:14px;color:var(--text);display:flex;gap:8px;align-items:flex-start}
.tier-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-top:9px;flex:none}
.tier-side{display:flex;flex-direction:column;align-items:flex-end;gap:12px;text-align:right}

/* compare */
.compare-wrap{overflow-x:auto;background:#fff;border:1px solid var(--border);border-radius:var(--r-block);box-shadow:var(--shadow-1)}
table.compare{width:100%;border-collapse:collapse;min-width:880px}
table.compare th,table.compare td{padding:0 18px;height:52px;text-align:center;border-bottom:1px solid var(--divider);font-size:15px}
table.compare thead th{height:auto;padding:18px;position:sticky;top:72px;background:#fff;vertical-align:top;border-bottom:1px solid var(--border);z-index:5}
table.compare thead th:first-child{text-align:left}
table.compare tbody th{text-align:left;font-weight:600;color:var(--text);background:var(--bg-alt);width:180px}
table.compare td.rec{background:var(--brand-50)}
table.compare thead th.rec{background:var(--brand-50);border-top:3px solid var(--orange-500)}
.col-name{font-size:17px;font-weight:700;color:var(--ink);display:block}
.col-price{font-size:32px;font-weight:800;color:var(--brand-600);line-height:1.2;margin-top:8px}
.col-price small{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px}
.col-note{font-size:13px;color:var(--muted);margin-top:6px;display:block}
.yes{color:var(--teal-500);font-weight:800}
.no{color:#94A3B8;font-weight:700}
.compare-foot{padding:18px 20px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;border-top:1px solid var(--border);background:#fff}
.compare-cards{display:none}

/* countdown band */
.band{background:var(--brand-50);border-radius:var(--r-block);padding:32px;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;position:relative;overflow:hidden}
.band::after{content:"";position:absolute;right:-40px;bottom:-60px;width:220px;height:220px;border-radius:50%;background:repeating-radial-gradient(circle,rgba(58,107,232,.10) 0 1px,transparent 1px 12px);pointer-events:none}
.band-title{font-size:22px;font-weight:800;color:var(--ink)}
.band p.band-desc{font-size:14px;color:var(--muted);margin-top:8px}
.band-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;position:relative;z-index:1}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.step{display:flex;gap:14px;align-items:flex-start}
.step-num{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#fff;border:1px solid var(--brand-200);color:var(--brand-600);font-weight:800;font-size:14px}
.step h4{font-size:16px;font-weight:700}
.step p{font-size:14px;color:var(--muted);margin-top:4px}

/* cms cards */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-1);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;display:flex;flex-direction:column;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200)}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover}
.card-cover-ph{aspect-ratio:16/9;width:100%;background:var(--brand-50);display:grid;place-items:center;color:var(--brand-200);font-weight:800;letter-spacing:2px}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:17px;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.card-desc{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);padding-top:10px;border-top:1px solid var(--divider)}
.empty-state{padding:48px 24px;text-align:center;background:#fff;border:1px dashed var(--border);border-radius:var(--r-card)}
.empty-icon{width:52px;height:52px;border-radius:14px;background:var(--brand-50);display:grid;place-items:center;margin:0 auto 14px;color:var(--brand-500);font-size:22px}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:14px}

/* form */
.form-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start}
.form-aside{grid-column:span 5}
.form-card{grid-column:span 7;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-2);padding:28px;position:relative}
.form-corner{position:absolute;top:-12px;left:24px}
.assure{display:flex;gap:12px;margin-top:20px}
.assure-icon{flex:none;width:32px;height:32px;border-radius:10px;background:var(--teal-50);color:var(--teal-500);display:grid;place-items:center;font-weight:800;font-size:14px}
.assure h4{font-size:15px;font-weight:700}
.assure p{font-size:13px;color:var(--muted)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field .req{color:var(--danger);margin-left:2px}
.control{width:100%;height:48px;padding:0 14px;border:1px solid var(--border);border-radius:var(--r-btn);background:#fff;transition:border-color .18s ease,box-shadow .18s ease}
textarea.control{height:auto;padding:12px 14px;min-height:104px;resize:vertical;line-height:1.7}
.control:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(37,84,214,.15)}
.control.is-error{border-color:var(--danger)}
.err{font-size:13px;color:var(--danger);margin-top:6px;display:none}
.err.show{display:block}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted)}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand-600)}
.form-success{display:none;border-left:3px solid var(--teal-500);background:var(--teal-50);border-radius:12px;padding:16px 18px;font-size:14px;color:#0F766E}
.form-success.show{display:block}

/* faq */
.faq-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:start}
.faq-col{grid-column:span 8}
.faq-side{grid-column:span 4}
details.faq{background:#fff;border:1px solid var(--border);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .2s,box-shadow .2s}
details.faq[open]{border-color:var(--brand-200);box-shadow:var(--shadow-1)}
details.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink);position:relative}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary .q{flex:none;width:24px;height:24px;border-radius:50%;background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:800;display:grid;place-items:center}
details.faq summary .chev{margin-left:auto;transition:transform .2s ease;color:var(--muted);font-size:14px}
details.faq[open] summary .chev{transform:rotate(180deg)}
details.faq[open] summary::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;background:var(--brand-600);border-radius:2px}
.faq-body{padding:0 20px 20px 58px;font-size:15px;color:var(--muted);line-height:1.85}
.side-card{background:var(--brand-50);border-radius:var(--r-card);padding:26px;position:sticky;top:96px}
.side-card h3{font-size:18px;font-weight:700}
.side-card p{font-size:14px;color:#475569;margin-top:10px}
.side-card ul{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.side-card li{font-size:14px;color:#475569;display:flex;gap:8px}
.side-card li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-top:9px;flex:none}

/* cta band */
.cta-band{background:var(--brand-50);border-radius:var(--r-block);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:26px;font-weight:800}
.cta-band p{font-size:15px;color:#475569;margin-top:8px}

/* footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:270px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-col a,.footer-col li{display:block;font-size:14px;color:var(--muted);margin-bottom:10px}
.footer-col a:hover{color:var(--brand-600)}
.footer-bottom{margin-top:48px;border-top:1px solid var(--border);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand-600)}

/* back to top */
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-2);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .25s ease;z-index:70;color:var(--brand-600);font-size:16px}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

@media (max-width:1279px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:28px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .nav-side{display:none}
  .nav-toggle{display:flex}
  .nav-grid{grid-template-columns:1fr auto 1fr;height:60px}
  .brand-text{font-size:15px}
  .hero{padding:48px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-copy,.hero-visual{grid-column:span 1}
  .hero-float{position:static;margin-top:18px;left:auto;bottom:auto;min-width:0}
  .band{grid-template-columns:1fr;padding:26px}
  .band-actions{justify-content:flex-start}
  .steps{grid-template-columns:1fr;gap:18px}
  .form-aside,.form-card{grid-column:span 12}
  .faq-col,.faq-side{grid-column:span 12}
  .side-card{position:static}
  .tier{grid-template-columns:44px 1fr;gap:16px}
  .tier-side{align-items:flex-start;text-align:left;grid-column:2}
  .tier:nth-child(1),.tier:nth-child(2),.tier:nth-child(3){margin-right:0}
  .compare-cards{display:grid;grid-template-columns:1fr;gap:18px}
  .compare-wrap{display:none}
  table.compare thead th{position:static}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .section-head h2{font-size:24px}
  .trust-list{grid-template-columns:1fr 1fr}
  .trust-item{border-bottom:1px solid var(--divider)}
  .trust-item:nth-child(2n){border-right:0}
  .cta-band{padding:28px}
  .cta-band h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:span 2}
  .two-col{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .band-actions .btn{width:100%}
}
@media (max-width:519px){
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:span 1}
  .trust-list{grid-template-columns:1fr}
  .trust-item{border-right:0}
}

/* roulang page: article */
:root{
    --brand-50:#EEF3FE;
    --brand-100:#DCE6FD;
    --brand-200:#BDD0FA;
    --brand-500:#3A6BE8;
    --brand-600:#2554D6;
    --brand-700:#1B3FA8;
    --orange-50:#FFF3E8;
    --orange-500:#FF7A1A;
    --orange-600:#E9650A;
    --teal-500:#12A594;
    --teal-50:#E7F7F4;
    --red-500:#E5484D;
    --ink:#0F172A;
    --text:#334155;
    --muted:#64748B;
    --border:#E2E8F0;
    --line:#F1F5F9;
    --bg:#FFFFFF;
    --bg-soft:#F7F9FC;
    --r-card:16px;
    --r-img:12px;
    --r-btn:10px;
    --r-block:24px;
    --shadow-1:0 1px 2px rgba(15,23,42,.05);
    --shadow-2:0 10px 24px -12px rgba(15,23,42,.18);
    --shadow-brand:0 16px 32px -16px rgba(37,84,214,.35);
    --gap:24px;
    --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.75;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;}
a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
.num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

/* ============ 导航 ============ */
.site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(255,255,255,.96);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-grid{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    gap:16px;
    height:72px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
    position:relative;
    font-size:15px;
    font-weight:500;
    color:var(--text);
    padding:6px 0;
    white-space:nowrap;
    text-decoration:none;
    transition:color .18s ease;
}
.nav-link::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-2px;
    height:2px;
    border-radius:2px;
    background:var(--brand-600);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand-600);text-decoration:none;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-600);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    text-decoration:none;
    justify-self:center;
}
.brand:hover{text-decoration:none;}
.brand-mark{
    width:34px;height:34px;
    border-radius:10px;
    background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
    color:#fff;
    font-size:17px;
    font-weight:800;
    display:flex;align-items:center;justify-content:center;
    box-shadow:var(--shadow-brand);
    flex:0 0 auto;
}
.brand-text{
    font-size:17px;
    font-weight:800;
    color:var(--ink);
    letter-spacing:.2px;
    white-space:nowrap;
}
.nav-cta{height:40px;padding:0 20px;font-size:14px;}
.nav-toggle{
    display:none;
    width:42px;height:42px;
    border-radius:10px;
    border:1px solid var(--border);
    background:#fff;
    position:relative;
    justify-self:end;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
    position:absolute;
    left:50%;
    width:18px;height:2px;
    border-radius:2px;
    background:var(--ink);
    transform:translateX(-50%);
    transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";left:0;top:-6px;transform:none;}
.nav-toggle span::after{content:"";left:0;top:6px;transform:none;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}
.mobile-panel{
    display:none;
    border-top:1px solid var(--line);
    background:#fff;
    padding:8px 20px 20px;
}
.mobile-panel.is-open{display:block;animation:panelIn .18s ease-out;}
@keyframes panelIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:translateY(0);}}
.m-row{
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:48px;
    font-size:15px;
    color:var(--text);
    border-bottom:1px solid var(--line);
    text-decoration:none;
}
.m-row:hover{color:var(--brand-600);text-decoration:none;}
.m-row span{color:var(--muted);}
.m-panel-cta{margin-top:16px;}

/* ============ 按钮 ============ */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:44px;
    padding:0 22px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    line-height:1;
    text-decoration:none;
    border:1px solid transparent;
    transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
    white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:#1F49BE;transform:translateY(-1px);box-shadow:var(--shadow-brand);}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.2);}
.btn-promo{background:var(--orange-500);color:#fff;}
.btn-promo:hover{background:var(--orange-600);transform:translateY(-1px);box-shadow:0 14px 26px -14px rgba(233,101,10,.6);}
.btn-promo:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.2);}
.btn-secondary{background:#fff;border-color:var(--brand-200);color:var(--brand-600);}
.btn-secondary:hover{background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-50);}
.btn-pill{border-radius:999px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}
.link-arrow{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--brand-600);
}
.link-arrow i{transition:transform .16s ease;font-size:12px;}
.link-arrow:hover i{transform:translateX(2px);}

/* ============ 徽章 ============ */
.badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    height:26px;
    padding:0 12px;
    border-radius:999px;
    font-size:13px;
    font-weight:600;
    line-height:1;
}
.badge-brand{background:var(--brand-50);color:var(--brand-700);}
.badge-orange{background:var(--orange-50);color:var(--orange-600);}
.badge-teal{background:var(--teal-50);color:var(--teal-500);}
.badge-grey{background:var(--line);color:var(--muted);}

/* ============ 面包屑 ============ */
.breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
    font-size:14px;
    color:var(--muted);
    padding:22px 0 0;
}
.breadcrumb a{color:var(--muted);text-decoration:none;}
.breadcrumb a:hover{color:var(--brand-600);text-decoration:none;}
.breadcrumb .sep{width:1px;height:12px;background:var(--border);}
.breadcrumb .now{color:var(--ink);font-weight:600;}

/* ============ 文章头 ============ */
.article-hero{padding:26px 0 40px;background:#fff;}
.article-hero-inner{max-width:820px;margin:0 auto;}
.article-h1{
    font-size:clamp(28px,4vw,44px);
    line-height:1.25;
    font-weight:800;
    margin-top:18px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.article-meta{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:10px 22px;
    margin-top:22px;
    font-size:14px;
    color:var(--muted);
}
.article-meta .m-item{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--brand-500);font-size:13px;}
.article-lede{
    margin-top:22px;
    font-size:16px;
    line-height:1.85;
    color:var(--muted);
    padding-left:16px;
    border-left:3px solid var(--brand-200);
}

/* ============ 正文 ============ */
.article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr);
    gap:40px;
    padding-bottom:72px;
}
.article-main{min-width:0;}
.article-shell{
    max-width:820px;
    margin:0 auto;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--r-block);
    box-shadow:var(--shadow-1);
    padding:44px 48px 40px;
}
.article-body{
    font-size:17px;
    line-height:1.9;
    color:var(--text);
    word-break:break-word;
}
.article-body > * + *{margin-top:18px;}
.article-body p{margin:0 0 18px;}
.article-body h2{
    position:relative;
    font-size:24px;
    line-height:1.4;
    font-weight:700;
    color:var(--ink);
    margin:40px 0 16px;
    padding-left:16px;
}
.article-body h2::before{
    content:"";
    position:absolute;
    left:0;top:8px;
    width:4px;height:20px;
    border-radius:2px;
    background:var(--brand-600);
}
.article-body h3{
    font-size:18px;
    font-weight:700;
    color:var(--ink);
    margin:30px 0 12px;
}
.article-body h4{font-size:16px;font-weight:700;color:var(--ink);margin:24px 0 10px;}
.article-body a{color:var(--brand-600);font-weight:500;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:4px;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px;}
.article-body ul li::before{
    content:"";
    position:absolute;
    left:4px;top:13px;
    width:7px;height:7px;
    border-radius:50%;
    background:var(--brand-500);
}
.article-body ol{counter-reset:li;padding-left:0;}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:li;}
.article-body ol li::before{
    content:counter(li);
    position:absolute;
    left:0;top:4px;
    width:20px;height:20px;
    border-radius:6px;
    background:var(--brand-50);
    color:var(--brand-700);
    font-size:12px;
    font-weight:700;
    display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
    margin:24px 0;
    padding:20px 22px;
    background:var(--bg-soft);
    border-left:3px solid var(--brand-600);
    border-radius:0 var(--r-img) var(--r-img) 0;
    color:var(--text);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
    border-radius:var(--r-img);
    margin:24px auto;
    box-shadow:var(--shadow-1);
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
    text-align:center;
    font-size:13px;
    color:var(--muted);
    margin-top:10px;
}
.article-body table{
    width:100%;
    border-collapse:collapse;
    font-size:15px;
    min-width:560px;
}
.article-body .table-wrap{
    overflow-x:auto;
    border:1px solid var(--border);
    border-radius:var(--r-img);
    margin:24px 0;
}
.article-body thead th{
    background:var(--bg-soft);
    color:var(--ink);
    font-weight:700;
    text-align:left;
}
.article-body th,.article-body td{
    padding:14px 16px;
    border-bottom:1px solid var(--line);
    line-height:1.7;
}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body code{
    background:var(--brand-50);
    color:var(--brand-700);
    padding:2px 6px;
    border-radius:6px;
    font-size:15px;
}
.article-body hr{border:0;border-top:1px solid var(--border);margin:32px 0;}

/* 正文提示卡 */
.article-tip{
    display:flex;
    gap:14px;
    align-items:flex-start;
    background:var(--brand-50);
    border:1px solid var(--brand-100);
    border-radius:var(--r-card);
    padding:18px 20px;
    margin:26px 0;
}
.article-tip i{color:var(--brand-600);font-size:18px;margin-top:3px;}
.article-tip p{margin:0;font-size:14px;line-height:1.8;color:var(--brand-700);}

/* 空态 */
.empty-state{
    text-align:center;
    padding:56px 24px;
    background:var(--bg-soft);
    border:1px dashed var(--border);
    border-radius:var(--r-card);
}
.empty-state i{font-size:30px;color:var(--brand-200);}
.empty-state p{margin:14px 0 20px;font-size:14px;color:var(--muted);}

/* ============ 文末区 ============ */
.article-foot{max-width:820px;margin:0 auto;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;}
.tag-pill{
    display:inline-flex;
    align-items:center;
    height:32px;
    padding:0 14px;
    border-radius:999px;
    background:var(--bg-soft);
    border:1px solid var(--border);
    font-size:13px;
    color:var(--muted);
    text-decoration:none;
    transition:all .16s ease;
}
.tag-pill:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-700);text-decoration:none;}
.pn-grid{
    display:grid;
    grid-template-columns:5fr 7fr;
    gap:20px;
    margin-top:32px;
}
.pn-card{
    display:block;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--r-card);
    padding:20px 22px;
    box-shadow:var(--shadow-1);
    text-decoration:none;
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200);text-decoration:none;}
.pn-card span{font-size:13px;color:var(--muted);}
.pn-card strong{display:block;margin-top:8px;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;}

.section-title-row{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:16px;
    margin-bottom:22px;
}
.section-title-row h2{font-size:24px;font-weight:700;}
.related-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
}
.post-card{
    display:flex;
    flex-direction:column;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    text-decoration:none;
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200);text-decoration:none;}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50);}
.post-thumb img{width:100%;height:100%;object-fit:cover;}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-body h3{
    font-size:17px;
    font-weight:600;
    line-height:1.55;
    color:var(--ink);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.post-body p{
    font-size:14px;
    line-height:1.75;
    color:var(--muted);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.post-meta{margin-top:auto;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;}

/* ============ 侧栏目录 ============ */
.article-aside{display:none;}
.aside-inner{position:sticky;top:96px;}
.aside-card{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--r-card);
    padding:22px;
    box-shadow:var(--shadow-1);
}
.aside-card h3{font-size:15px;font-weight:700;margin-bottom:14px;}
.toc-list a{
    display:block;
    padding:8px 0;
    font-size:14px;
    color:var(--muted);
    text-decoration:none;
    border-bottom:1px solid var(--line);
    line-height:1.6;
}
.toc-list a:last-child{border-bottom:0;}
.toc-list a:hover{color:var(--brand-600);text-decoration:none;}
.aside-cta{
    margin-top:20px;
    background:linear-gradient(160deg,var(--brand-600),var(--brand-700));
    border-radius:var(--r-card);
    padding:22px;
    color:#fff;
}
.aside-cta h3{color:#fff;font-size:16px;margin-bottom:8px;}
.aside-cta p{font-size:13px;line-height:1.75;color:rgba(255,255,255,.82);margin-bottom:16px;}

/* ============ CTA 带 ============ */
.cta-band{
    background:var(--brand-50);
    border-radius:var(--r-block);
    padding:40px 44px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    margin:0 auto 72px;
    max-width:1200px;
}
.cta-band h2{font-size:26px;line-height:1.4;font-weight:700;max-width:620px;}
.cta-band p{margin-top:10px;font-size:14px;color:var(--muted);}
.cta-band .btn{flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--border);padding:56px 0 0;}
.footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
    gap:32px;
    padding-bottom:40px;
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--muted);max-width:250px;line-height:1.8;}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:16px;}
.footer-col a,.footer-col p{
    display:block;
    font-size:14px;
    color:var(--muted);
    line-height:1.9;
    text-decoration:none;
}
.footer-col a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
    border-top:1px solid var(--border);
    padding:20px 0 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--brand-600);}

/* ============ 回到顶部 ============ */
.back-top{
    position:fixed;
    right:24px;
    bottom:24px;
    width:44px;height:44px;
    border-radius:50%;
    background:#fff;
    box-shadow:var(--shadow-2);
    border:1px solid var(--border);
    color:var(--brand-600);
    display:flex;align-items:center;justify-content:center;
    opacity:0;
    pointer-events:none;
    transform:translateY(10px);
    transition:all .2s ease;
    z-index:70;
}
.back-top.is-show{opacity:1;pointer-events:auto;transform:translateY(0);}
.back-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}

/* ============ 响应式 ============ */
@media (min-width:1280px){
    .article-layout{grid-template-columns:minmax(0,1fr) 260px;}
    .article-aside{display:block;}
}
@media (min-width:1024px){
    .site-header.is-scrolled{background:#fff;}
}
@media (max-width:1023px){
    .nav-side{display:none;}
    .nav-grid{grid-template-columns:auto 1fr auto;}
    .brand{justify-self:start;margin-left:12px;}
    .brand-text{font-size:15px;max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
    .nav-toggle{display:block;}
    .nav-grid{height:64px;}
    .cta-band{flex-direction:column;align-items:flex-start;padding:32px 28px;margin-bottom:56px;}
    .cta-band .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:28px;}
}
@media (max-width:900px){
    .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .pn-grid{grid-template-columns:1fr;}
}
@media (max-width:767px){
    .nav-grid{height:60px;}
    .brand-text{font-size:14px;max-width:150px;}
    .brand-mark{width:30px;height:30px;font-size:15px;border-radius:9px;}
    .article-hero{padding:20px 0 28px;}
    .article-shell{padding:26px 20px 28px;border-radius:var(--r-card);}
    .article-body{font-size:16px;line-height:1.85;}
    .article-body h2{font-size:20px;}
    .related-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
    .footer-brand{grid-column:1 / -1;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .back-top{right:16px;bottom:16px;}
}
@media (max-width:520px){
    .article-meta{gap:8px 16px;}
    .footer-grid{grid-template-columns:1fr;}
    .cta-band{border-radius:var(--r-card);padding:26px 20px;}
    .cta-band h2{font-size:21px;}
}

/* roulang page: category1 */
:root{
  --brand-50:#EEF3FE;
  --brand-100:#DCE6FD;
  --brand-200:#BDD0FA;
  --brand-500:#3A6BE8;
  --brand-600:#2554D6;
  --brand-700:#1B3FA8;
  --orange-50:#FFF3E8;
  --orange-500:#FF7A1A;
  --orange-600:#E9650A;
  --teal:#12A594;
  --teal-50:#E7F7F4;
  --red:#E5484D;
  --ink:#0F172A;
  --text:#334155;
  --muted:#64748B;
  --line:#E2E8F0;
  --divider:#F1F5F9;
  --bg-alt:#F7F9FC;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-block:24px;
  --sh1:0 1px 2px rgba(15,23,42,.05);
  --sh2:0 10px 24px -12px rgba(15,23,42,.18);
  --shb:0 16px 32px -16px rgba(37,84,214,.35);
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:130px}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:#fff;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh1)}
.nav-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  column-gap:12px;
  height:72px;
}
.nav-side{display:flex;align-items:center;gap:4px;min-width:0}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end;gap:8px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 10px;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  border-radius:8px;
  white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-50);text-decoration:none}
.nav-link.is-active{color:var(--brand-600)}
.nav-link.is-active::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:800}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;flex:none;
  display:grid;place-items:center;
  border-radius:10px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;font-size:17px;font-weight:800;
  box-shadow:0 6px 14px -8px rgba(37,84,214,.7);
}
.brand-text{font-size:16px;letter-spacing:.2px;white-space:nowrap}
.nav-cta{height:40px;padding:0 18px;font-size:14px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:10px;
  grid-column:3;justify-self:end;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{position:relative}
.nav-toggle span::before{content:"";position:absolute;top:-6px;left:0}
.nav-toggle span::after{content:"";position:absolute;top:6px;left:0}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{
  display:none;
  position:absolute;left:0;right:0;top:100%;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh2);
  padding:8px 20px 20px;
}
.m-row{
  display:flex;align-items:center;justify-content:space-between;
  height:48px;
  font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--divider);
}
.m-row:hover{color:var(--brand-600);text-decoration:none}
.m-row span{color:var(--muted);font-weight:400}
.m-panel-cta{margin-top:16px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px -12px rgba(37,84,214,.9)}
.btn-primary:hover{background:#2049bd;color:#fff;transform:translateY(-1px);box-shadow:var(--shb)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.25)}
.btn-secondary{background:#fff;border-color:var(--brand-200);color:var(--brand-600)}
.btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(0)}
.btn-light{background:#fff;color:var(--brand-600)}
.btn-light:hover{background:#fff;color:var(--brand-700);transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(15,23,42,.5)}
.btn-ghost{background:transparent;color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-600)}
.btn-pill{border-radius:999px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.4;
  white-space:nowrap;
}
.badge-brand{background:var(--brand-50);color:var(--brand-700)}
.badge-orange{background:var(--orange-50);color:var(--orange-600)}
.badge-teal{background:var(--teal-50);color:var(--teal)}
.badge-gray{background:var(--divider);color:var(--muted)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:14px;color:var(--muted);
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:#CBD5E1}
.breadcrumb .current{color:var(--text);font-weight:600}

/* ---------- 分类页头 ---------- */
.cat-hero{
  background:var(--bg-alt);
  border-bottom:1px solid var(--line);
  padding:40px 0 64px;
  position:relative;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(58,107,232,.08),transparent 65%);
  pointer-events:none;
}
.hero-title{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.25;
  font-weight:800;
  color:var(--ink);
  letter-spacing:.2px;
  margin-top:16px;
}
.hero-sub{
  font-size:17px;color:var(--muted);margin-top:16px;max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust-list{
  display:flex;flex-wrap:wrap;gap:12px 28px;
  margin-top:34px;padding-top:24px;border-top:1px solid var(--line);
}
.trust-item{display:flex;align-items:baseline;gap:8px}
.trust-item b{
  font-size:20px;font-weight:800;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:.2px;
}
.trust-item span{font-size:13px;color:var(--muted)}
.hero-figure{
  border-radius:var(--r-img);
  overflow:hidden;
  box-shadow:var(--sh2);
  border:1px solid var(--line);
  background:#fff;
}
.hero-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-img);
}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:72px;z-index:40;
  background:#fff;
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;gap:10px;
  padding:12px 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-chip{
  flex:none;
  padding:8px 16px;
  border-radius:999px;
  background:var(--bg-alt);
  border:1px solid transparent;
  color:var(--text);
  font-size:14px;font-weight:600;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.anchor-chip:hover{background:var(--brand-50);color:var(--brand-600);border-color:var(--brand-200);text-decoration:none}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.sec-head{max-width:720px}
.sec-eyebrow{
  display:inline-block;
  font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--brand-600);text-transform:uppercase;
}
.sec-title{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.32;
  font-weight:700;
  color:var(--ink);
  margin-top:12px;
  letter-spacing:.2px;
}
.sec-desc{font-size:16px;color:var(--muted);margin-top:14px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:48px}
.timeline::before{
  content:"";position:absolute;
  left:23px;top:10px;bottom:10px;
  width:2px;background:var(--brand-100);border-radius:2px;
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:48px 1fr;
  column-gap:20px;
  margin-bottom:20px;
}
.tl-item:last-child{margin-bottom:0}
.tl-num{
  width:48px;height:48px;
  display:grid;place-items:center;
  border-radius:50%;
  background:#fff;
  border:2px solid var(--brand-200);
  color:var(--brand-600);
  font-size:15px;font-weight:800;
  font-variant-numeric:tabular-nums;
  position:relative;z-index:1;
}
.tl-body{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-body:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:var(--brand-200)}
.tl-title{
  font-size:19px;font-weight:700;color:var(--ink);line-height:1.4;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.tl-text{font-size:15px;color:var(--text);margin-top:12px}
.tl-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  margin-top:16px;padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:13px;color:var(--muted);
}
.tl-meta b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}

@media (min-width:1024px){
  .timeline::before{left:calc(50% - 1px)}
  .tl-item{grid-template-columns:1fr 56px 1fr;column-gap:0;align-items:center;margin-bottom:24px}
  .tl-num{grid-column:2;grid-row:1;justify-self:center;width:56px;height:56px}
  .tl-body{grid-column:3;grid-row:1;margin-left:24px}
  .tl-item:nth-child(even) .tl-body{grid-column:1;grid-row:1;margin-left:0;margin-right:24px}
}

/* ---------- 入口卡 ---------- */
.entry-card{
  display:flex;flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:var(--brand-200)}
.entry-card h3{font-size:20px;font-weight:700;color:var(--ink);margin-top:14px}
.entry-card p{font-size:15px;color:var(--muted);margin-top:12px}
.entry-card .entry-foot{margin-top:auto;padding-top:22px}
.entry-list{margin-top:18px;display:grid;gap:10px}
.entry-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;color:var(--text);
}
.entry-list li::before{
  content:"";position:absolute;left:4px;top:10px;
  width:6px;height:6px;border-radius:50%;background:var(--brand-500);
}
.entry-card-main{
  background:linear-gradient(160deg,var(--brand-600),var(--brand-700));
  border-color:transparent;
  color:#fff;
  box-shadow:var(--shb);
}
.entry-card-main:hover{border-color:transparent}
.entry-card-main h3{color:#fff}
.entry-card-main p{color:rgba(255,255,255,.82)}
.entry-card-main .entry-list li{color:rgba(255,255,255,.92)}
.entry-card-main .entry-list li::before{background:#fff}
.entry-card-main .badge{background:rgba(255,255,255,.16);color:#fff}
.entry-index{
  font-size:13px;font-weight:700;letter-spacing:1.2px;
  color:var(--brand-600);
}
.entry-card-main .entry-index{color:rgba(255,255,255,.75)}

/* ---------- 提示条 ---------- */
.notice-bar{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--orange-50);
  border:1px solid #FFE0C6;
  border-radius:var(--r-card);
  padding:20px 24px;
  margin-top:32px;
}
.notice-icon{
  flex:none;width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--orange-500);color:#fff;
  font-size:15px;font-weight:800;line-height:1;
}
.notice-bar p{font-size:15px;color:#8A4A12}
.notice-bar strong{color:#7A3E08}

/* ---------- FAQ ---------- */
.faq-list{margin-top:40px;border-top:1px solid var(--line)}
.faq-item{
  position:relative;
  padding-left:16px;
  border-bottom:1px solid var(--line);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;
  width:2px;border-radius:2px;background:transparent;
  transition:background .2s ease;
}
.faq-item[open]::before{background:var(--brand-600)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:20px 44px 20px 0;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:""}
.faq-item summary:hover{color:var(--brand-600)}
.faq-item summary::after{
  content:"";position:absolute;right:10px;top:27px;
  width:8px;height:8px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-answer{
  font-size:15px;color:var(--muted);
  padding:0 44px 22px 0;
  line-height:1.85;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  border-radius:var(--r-block);
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
}
.cta-band h2{
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.4;font-weight:700;color:var(--ink);
  max-width:640px;
}
.cta-band p{font-size:14px;color:var(--muted);margin-top:10px}

/* ---------- 相关分类胶囊 ---------- */
.pill-row{display:flex;flex-wrap:wrap;gap:12px}
.pill-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;
  border-radius:999px;
  border:1px solid var(--brand-200);
  background:#fff;
  color:var(--brand-600);
  font-size:14px;font-weight:600;
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.pill-link:hover{background:var(--brand-50);border-color:var(--brand-500);color:var(--brand-700);text-decoration:none;transform:translateY(-2px)}
.pill-link .arrow{transition:transform .18s ease}
.pill-link:hover .arrow{transform:translateX(2px)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-alt);
  border-top:1px solid var(--line);
  padding:56px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;
  gap:32px;
}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:240px;line-height:1.7}
.footer-col h4{
  font-size:14px;font-weight:700;color:var(--ink);
  margin-bottom:14px;letter-spacing:.2px;
}
.footer-col a{
  display:block;
  font-size:14px;color:var(--muted);
  margin-bottom:10px;
}
.footer-col a:hover{color:var(--brand-600)}
.footer-col p{font-size:14px;color:var(--muted);margin-bottom:8px;line-height:1.7}
.footer-bottom{
  margin-top:44px;
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand-600)}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh2);
  color:var(--brand-600);
  opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease,background .18s ease,color .18s ease,transform .18s ease;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-side{display:none}
  .nav-toggle{display:grid}
  .nav-grid{height:60px}
  .brand-text{font-size:15px}
  .mobile-panel{display:block;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .18s ease,transform .18s ease,visibility .18s ease}
  .mobile-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .anchor-bar{top:60px}
  .section{padding:72px 0}
  .cat-hero{padding:32px 0 48px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta-band{padding:32px}
}
@media (max-width:639px){
  .section{padding:56px 0}
  .brand-text{font-size:14px}
  .hero-actions .btn{width:100%}
  .entry-card{padding:22px}
  .tl-body{padding:20px}
  .cta-band{padding:26px;border-radius:20px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
  .notice-bar{padding:18px}
}

/* roulang page: category2 */
:root{
  --brand-50:#EEF3FE;--brand-100:#DCE6FD;--brand-200:#BDD0FA;--brand-500:#3A6BE8;--brand-600:#2554D6;--brand-700:#1B3FA8;
  --orange-50:#FFF3E8;--orange-500:#FF7A1A;--orange-600:#E9650A;
  --teal-500:#12A594;--teal-50:#E7F7F4;
  --red-500:#E5484D;
  --ink:#0F172A;--text:#334155;--muted:#64748B;--line:#E2E8F0;--line-soft:#F1F5F9;--bg-soft:#F7F9FC;
  --radius-card:16px;--radius-img:12px;--radius-btn:10px;--radius-wrap:24px;
  --shadow-1:0 1px 2px rgba(15,23,42,.05);
  --shadow-2:0 10px 24px -12px rgba(15,23,42,.18);
  --shadow-brand:0 16px 32px -16px rgba(37,84,214,.35);
  --section-pad:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;background:#FFFFFF;color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--brand-600);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:var(--section-pad) 0}
.section-soft{background:var(--bg-soft)}
.section-brand{background:var(--brand-50)}
.nums{font-variant-numeric:tabular-nums}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line-soft);transition:box-shadow .2s ease,background-color .2s ease}
.site-header.is-scrolled{box-shadow:var(--shadow-1);background:rgba(255,255,255,.96)}
.nav-grid{position:relative;display:flex;align-items:center;justify-content:space-between;height:72px}
.nav-side{display:flex;align-items:center;gap:26px}
.nav-link{font-size:15px;color:var(--text);font-weight:500;padding:6px 2px;position:relative;transition:color .18s ease}
.nav-link:hover{color:var(--brand-600);text-decoration:none}
.nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:22px;height:2px;border-radius:2px;background:var(--brand-600)}
.brand{position:absolute;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:8px}
.brand:hover{text-decoration:none}
.brand-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:16px;flex:none}
.brand-text{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
.nav-cta{height:38px;padding:0 18px;font-size:14px}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line-soft)}
.mobile-panel.is-open{display:block;animation:panelIn .18s ease}
@keyframes panelIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.m-row{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 20px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line-soft)}
.m-row:hover{background:var(--brand-50);text-decoration:none}
.m-row span{color:var(--muted)}
.m-panel-cta{padding:14px 20px 18px}
@media (max-width:1023px){
  .nav-grid{height:60px}
  .nav-side{display:none}
  .nav-toggle{display:flex}
  .brand-mark{width:28px;height:28px;font-size:14px}
  .brand-text{font-size:13px}
}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;line-height:1;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:#1F49BD;transform:translateY(-1px);box-shadow:var(--shadow-brand)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.28)}
.btn-outline{background:#fff;border-color:var(--brand-200);color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-promo{background:var(--orange-500);color:#fff}
.btn-promo:hover{background:var(--orange-600);transform:translateY(-1px);box-shadow:0 16px 32px -16px rgba(233,101,10,.45)}
.btn-ghost{background:transparent;color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50)}
.btn-pill{border-radius:999px}
.btn-block{width:100%}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-600);font-size:15px}
.text-link::after{content:"→";transition:transform .18s ease}
.text-link:hover{text-decoration:none}
.text-link:hover::after{transform:translateX(3px)}

/* 徽章与标签 */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6}
.badge-brand{background:var(--brand-50);color:var(--brand-700)}
.badge-orange{background:var(--orange-50);color:var(--orange-600)}
.badge-teal{background:var(--teal-50);color:var(--teal-500)}
.badge-grey{background:var(--bg-soft);color:var(--muted)}
.chip{display:inline-flex;align-items:center;padding:8px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text);font-size:14px;font-weight:500;transition:all .18s ease;white-space:nowrap}
.chip:hover{border-color:var(--brand-200);color:var(--brand-600);background:var(--brand-50);text-decoration:none;transform:translateY(-1px)}

/* 面包屑 */
.crumb{padding:22px 0 4px;font-size:14px;color:var(--muted)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"";width:1px;height:12px;background:var(--line);display:inline-block}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-600)}
.crumb .current{color:var(--ink);font-weight:600}

/* 分类页头 */
.cat-hero{padding:36px 0 64px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-soft) 100%)}
.cat-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cat-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:800;color:var(--ink);letter-spacing:.3px;margin:16px 0 14px}
.cat-hero .lead{font-size:18px;color:var(--text);line-height:1.7;max-width:520px}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 22px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:13px;color:var(--muted)}
.hero-facts li{display:flex;align-items:center;gap:7px}
.hero-facts li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal-500);flex:none}
.cat-hero-media{position:relative}
.cat-hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);box-shadow:var(--shadow-2);border:1px solid var(--line)}
.cat-hero-media figcaption{position:absolute;left:16px;bottom:16px;right:16px;background:rgba(255,255,255,.94);border-radius:12px;padding:12px 16px;font-size:13px;color:var(--text);box-shadow:var(--shadow-1);border:1px solid var(--line-soft)}
@media (max-width:1023px){
  .cat-hero{padding:24px 0 48px}
  .cat-hero-grid{grid-template-columns:1fr;gap:30px}
  .cat-hero-media{order:-1}
}

/* 锚点条 */
.anchor-bar{position:sticky;top:72px;z-index:40;background:#fff;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line)}
.anchor-inner{display:flex;align-items:center;gap:12px;padding:12px 20px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-label{font-size:13px;color:var(--muted);font-weight:600;flex:none;padding-right:6px;border-right:1px solid var(--line)}
@media (max-width:1023px){.anchor-bar{top:60px}}

/* 板块标题 */
.section-head{max-width:720px;margin-bottom:40px}
.section-head .eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--brand-600);letter-spacing:.6px;margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:.2px}
.section-head p{margin-top:12px;font-size:16px;color:var(--muted)}

/* 交替图文 */
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.alt-row+.alt-row{margin-top:72px}
.alt-row.reverse .alt-media{order:2}
.alt-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);box-shadow:var(--shadow-2);border:1px solid var(--line)}
.alt-copy .step-num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);font-weight:800;font-size:15px;font-variant-numeric:tabular-nums}
.alt-copy h3{font-size:22px;line-height:1.4;font-weight:700;color:var(--ink);margin:16px 0 12px}
.alt-copy p{font-size:16px;line-height:1.8}
.tick-list{margin:18px 0 20px;display:grid;gap:10px}
.tick-list li{position:relative;padding-left:26px;font-size:15px;color:var(--text)}
.tick-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--teal-500);font-weight:800;font-size:14px}
@media (max-width:1023px){
  .alt-row{grid-template-columns:1fr;gap:24px}
  .alt-row.reverse .alt-media{order:0}
  .alt-row+.alt-row{margin-top:48px}
}

/* 核验清单 */
.checklist-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-2);overflow:hidden}
.checklist{padding:8px 0}
.checklist li{display:flex;align-items:flex-start;gap:14px;min-height:44px;padding:14px 24px;border-bottom:1px solid var(--line-soft);font-size:15px;color:var(--text)}
.checklist li:last-child{border-bottom:none}
.check-box{width:20px;height:20px;border-radius:6px;border:1.5px solid var(--brand-200);background:var(--brand-50);flex:none;margin-top:3px;position:relative}
.check-box::after{content:"";position:absolute;left:6px;top:2px;width:5px;height:10px;border-right:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);transform:rotate(42deg)}
.checklist-foot{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:18px 24px;background:var(--bg-soft);border-top:1px solid var(--line);font-size:14px;color:var(--muted)}

/* Bento 网格 */
.bento{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto;gap:24px}
.bento-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200)}
.bento-card h3{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px;line-height:1.4}
.bento-card p{font-size:15px;line-height:1.8}
.bento-main{grid-row:span 2;background:var(--brand-600);border-color:var(--brand-600);color:#fff;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow-brand)}
.bento-main h3,.bento-main p{color:#fff}
.bento-main .badge{background:rgba(255,255,255,.18);color:#fff}
.bento-main ol{margin-top:22px;display:grid;gap:14px;counter-reset:bm}
.bento-main ol li{counter-increment:bm;position:relative;padding-left:36px;font-size:15px;color:#EAF0FE;line-height:1.7}
.bento-main ol li::before{content:counter(bm);position:absolute;left:0;top:1px;width:24px;height:24px;border-radius:50%;background:rgba(255,255,255,.2);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}
.bento-list{margin-top:14px;display:grid;gap:8px}
.bento-list li{font-size:14px;color:var(--muted);padding-left:18px;position:relative}
.bento-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);opacity:.6}
@media (max-width:900px){
  .bento{grid-template-columns:1fr;grid-template-rows:auto}
  .bento-main{grid-row:auto}
}

/* 提示条 */
.notice-bar{display:flex;gap:14px;align-items:flex-start;padding:18px 22px;border-radius:var(--radius-card);background:var(--teal-50);border-left:4px solid var(--teal-500);font-size:14px;color:var(--text)}
.notice-bar strong{color:var(--ink)}

/* CTA 带 */
.cta-band{background:linear-gradient(180deg,var(--brand-50),#fff);border-top:1px solid var(--brand-100);border-bottom:1px solid var(--brand-100)}
.cta-inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;padding:56px 0}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--ink);line-height:1.35}
.cta-inner p{margin-top:8px;font-size:15px;color:var(--muted)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* 相关分类 */
.related-wrap{padding:56px 0 24px}
.related-wrap h2{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:18px}
.related{display:flex;flex-wrap:wrap;gap:12px}

/* 页脚 */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:64px 0 0;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand .brand{position:static;transform:none;margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--muted);max-width:230px;line-height:1.7}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--muted);margin-bottom:10px;transition:color .18s ease}
.footer-col a:hover{color:var(--brand-600);text-decoration:none}
.footer-col p{font-size:14px;color:var(--muted);margin-bottom:10px;line-height:1.7}
.footer-bottom{margin-top:44px;border-top:1px solid var(--line);padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--muted)}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand-600)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

/* 回到顶部 */
.to-top{position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-2);display:flex;align-items:center;justify-content:center;color:var(--brand-600);font-size:16px;cursor:pointer;opacity:0;visibility:hidden;transition:all .22s ease;z-index:70}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

@media (max-width:1023px){
  :root{--section-pad:72px}
}
@media (max-width:640px){
  :root{--section-pad:56px}
  body{font-size:15px}
  .btn{height:48px;width:100%}
  .cat-hero-actions .btn,.cta-actions .btn{width:100%}
  .cta-inner{padding:44px 0}
}

/* roulang page: category4 */
:root{
  --brand-50:#EEF3FE;--brand-100:#DCE6FD;--brand-200:#BDD0FA;--brand-500:#3A6BE8;--brand-600:#2554D6;--brand-700:#1B3FA8;
  --orange-50:#FFF3E8;--orange-500:#FF7A1A;--orange-600:#E9650A;
  --teal-500:#12A594;--teal-50:#E7F7F4;--red-500:#E5484D;
  --ink:#0F172A;--body-c:#334155;--muted:#64748B;--line:#E2E8F0;--soft:#F1F5F9;--page:#FFFFFF;--alt:#F7F9FC;
  --r-card:16px;--r-img:12px;--r-btn:10px;--r-input:10px;--r-pill:999px;--r-block:24px;
  --sh1:0 1px 2px rgba(15,23,42,.05);
  --sh2:0 10px 24px -12px rgba(15,23,42,.18);
  --shb:0 16px 32px -16px rgba(37,84,214,.35);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--page);color:var(--body-c);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;letter-spacing:.1px;
}
img{max-width:100%;display:block;border-radius:var(--r-img);object-fit:cover}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease,text-decoration-color .18s ease}
a:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:.3px;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.num{font-variant-numeric:tabular-nums}
.mix-gap{padding:0 2px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease,background-color .2s ease}
.site-header.is-scrolled{box-shadow:var(--sh1);background:rgba(255,255,255,.96)}
.nav-grid{position:relative;display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.nav-side{display:none;align-items:center;gap:22px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:var(--body-c);padding:6px 2px;white-space:nowrap}
.nav-link:hover{color:var(--brand-600);text-decoration:none}
.nav-link.is-active{color:var(--brand-600);font-weight:700}
.nav-link.is-active::after{content:"";position:absolute;left:2px;right:2px;bottom:-2px;height:2px;border-radius:2px;background:var(--brand-600)}
.brand{position:absolute;left:50%;transform:translateX(-50%);display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand-600),var(--brand-500));color:#fff;font-weight:800;font-size:17px;box-shadow:var(--shb)}
.brand-text{font-size:15px;font-weight:800;color:var(--ink);white-space:nowrap}
.nav-cta{height:38px;padding:0 16px;font-size:14px}
.nav-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);align-items:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);content:"";position:relative}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:6px 20px 18px}
.mobile-panel.is-open{display:block;animation:panelIn .18s ease forwards}
@keyframes panelIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.m-row{display:flex;align-items:center;justify-content:space-between;height:48px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--soft)}
.m-row:hover{color:var(--brand-600);text-decoration:none}
.m-row span{color:var(--muted)}
.m-panel-cta{padding-top:14px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;text-decoration:none;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.14)}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh1)}
.btn-primary:hover{background:var(--brand-700);box-shadow:var(--shb)}
.btn-promo{background:var(--orange-500);color:#fff}
.btn-promo:hover{background:var(--orange-600);box-shadow:0 16px 32px -16px rgba(233,101,10,.45)}
.btn-outline{background:#fff;color:var(--brand-600);border:1px solid var(--brand-200)}
.btn-outline:hover{border-color:var(--brand-500);background:var(--brand-50)}
.btn-ghost{background:transparent;color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50)}
.btn-pill{border-radius:var(--r-pill)}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600)}
.text-link svg{transition:transform .18s ease}
.text-link:hover svg{transform:translateX(2px)}

/* ---------- badges / chips ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;line-height:1.6}
.badge-brand{background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-200)}
.badge-orange{background:var(--orange-50);color:var(--orange-600)}
.badge-teal{background:var(--teal-50);color:var(--teal-500)}
.badge-gray{background:var(--soft);color:#475569}
.chip{display:inline-flex;align-items:center;height:38px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;color:var(--body-c);font-size:14px;font-weight:600;transition:all .18s ease}
.chip:hover{border-color:var(--brand-200);color:var(--brand-600);text-decoration:none;transform:translateY(-1px)}
.chip.is-on{background:var(--brand-600);border-color:var(--brand-600);color:#fff}

/* ---------- breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{width:1px;height:12px;background:var(--line);display:inline-block}
.breadcrumb .cur{color:var(--ink);font-weight:600}

/* ---------- page head ---------- */
.page-head{padding:48px 0 64px;background:var(--alt);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(58,107,232,.10),transparent 68%)}
.page-head-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
.page-head h1{font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:800;margin:14px 0 12px}
.lead{font-size:16.5px;color:var(--body-c);max-width:520px}
.page-head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.head-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:30px;padding-top:22px;border-top:1px dashed var(--line)}
.head-stats li{font-size:13px;color:var(--muted)}
.head-stats strong{display:block;font-size:20px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums}
.page-head-media{margin:0}
.page-head-media img{width:100%;aspect-ratio:4/3;border-radius:var(--r-img);box-shadow:var(--sh2)}

/* ---------- search band ---------- */
.search-band{padding:40px 0 8px;background:#fff}
.search-box{display:flex;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh2);padding:16px}
.search-box input{height:48px;width:100%;border:1px solid var(--line);border-radius:var(--r-input);padding:0 16px;font-size:15px;color:var(--ink);background:#fff;transition:border-color .18s ease,box-shadow .18s ease}
.search-box input::placeholder{color:#94A3B8}
.search-box input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(37,84,214,.15);outline:none}
.search-tip{font-size:13px;color:var(--muted);margin-top:12px}
.search-tip b{color:var(--brand-700);font-weight:600}
.anchor-row{display:flex;gap:10px;overflow-x:auto;padding:22px 0 4px;scrollbar-width:thin}
.anchor-row::-webkit-scrollbar{height:6px}
.anchor-row::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}

/* ---------- hot list ---------- */
.hot-band{padding:64px 0}
.hot-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
.hot-media{margin:0;position:relative}
.hot-media img{width:100%;aspect-ratio:16/9;box-shadow:var(--sh2)}
.hot-media figcaption{position:absolute;left:14px;bottom:14px;background:rgba(255,255,255,.94);border-radius:var(--r-pill);padding:6px 14px;font-size:12.5px;font-weight:600;color:var(--brand-700)}
.section-head{margin-bottom:28px;max-width:680px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3}
.section-head p{font-size:15px;color:var(--muted);margin-top:10px}
.hot-list ol{display:flex;flex-direction:column;gap:18px}
.hot-item{display:grid;grid-template-columns:32px 1fr;gap:14px;align-items:center}
.hot-rank{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--brand-50);color:var(--brand-700);font-weight:800;font-size:14px;font-variant-numeric:tabular-nums}
.hot-item:nth-child(1) .hot-rank{background:var(--orange-500);color:#fff}
.hot-item:nth-child(2) .hot-rank{background:var(--orange-50);color:var(--orange-600)}
.hot-item:nth-child(3) .hot-rank{background:var(--brand-100);color:var(--brand-700)}
.hot-title{font-size:15.5px;font-weight:600;color:var(--ink);display:block}
.hot-title:hover{color:var(--brand-600);text-decoration:none}
.hot-bar{position:relative;height:6px;border-radius:999px;background:var(--soft);margin-top:8px;overflow:hidden}
.hot-bar i{position:absolute;left:0;top:0;bottom:0;border-radius:999px;background:linear-gradient(90deg,var(--brand-500),var(--brand-600))}
.hot-meta{font-size:12.5px;color:var(--muted);margin-top:6px;font-variant-numeric:tabular-nums}

/* ---------- faq ---------- */
.faq-section{padding:64px 0 88px;background:var(--alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.faq-columns{display:grid;grid-template-columns:1fr;gap:8px 48px;align-items:start}
.faq-group{padding:24px 0;border-top:1px solid var(--soft)}
.faq-group:first-child{border-top:0}
.faq-group h3{font-size:19px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:6px}
.faq-group h3::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--brand-600)}
.faq-group .group-note{font-size:13px;color:var(--muted);margin:0 0 8px 14px}
.faq-item{border:0}
.faq-item summary{display:flex;align-items:flex-start;gap:12px;padding:14px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;list-style:none;transition:color .18s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:""}
.faq-item summary:hover{color:var(--brand-600)}
.faq-item summary .q-icon{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:800;display:grid;place-items:center;margin-top:2px}
.faq-item summary .arrow{margin-left:auto;flex:0 0 auto;z-index:1;position:relative;transition:transform .2s ease;color:var(--muted);margin-top:4px}
.faq-item[open] summary{color:var(--brand-700);padding-left:12px;border-left:2px solid var(--brand-600)}
.faq-item[open] summary .arrow{transform:rotate(180deg);color:var(--brand-600)}
.faq-body{padding:0 0 16px 34px;font-size:15px;color:var(--body-c);line-height:1.85}
.faq-item[open] .faq-body{animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
.faq-empty{display:none;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px;text-align:center;margin-top:24px}
.faq-empty.is-on{display:block}
.faq-empty p{font-size:14px;color:var(--muted);margin-bottom:14px}

/* ---------- contact band ---------- */
.contact-band{padding:88px 0 96px}
.contact-card{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--r-block);padding:32px;display:grid;grid-template-columns:1fr;gap:24px;align-items:center}
.contact-card h2{font-size:clamp(20px,2.4vw,26px);line-height:1.35;margin-bottom:10px}
.contact-card p{font-size:15px;color:var(--body-c);max-width:620px}
.contact-list{display:flex;flex-wrap:wrap;gap:22px;margin-top:18px}
.contact-list li{font-size:13px;color:var(--muted)}
.contact-list strong{display:block;font-size:17px;font-weight:800;color:var(--brand-700);font-variant-numeric:tabular-nums}
.contact-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- related cats ---------- */
.related-cats{padding:0 0 88px}
.mini-title{font-size:14px;font-weight:700;color:var(--muted);letter-spacing:.6px;margin-bottom:16px}
.chip-row{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- cta band ---------- */
.cta-band{background:var(--alt);border-top:1px solid var(--line);padding:56px 0}
.cta-inner{display:flex;flex-direction:column;gap:20px;align-items:flex-start;justify-content:space-between}
.cta-inner h2{font-size:clamp(20px,2.5vw,28px);line-height:1.35}
.cta-inner p{font-size:14.5px;color:var(--muted);margin-top:8px}

/* ---------- footer ---------- */
.site-footer{background:var(--alt);border-top:1px solid var(--line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:260px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-col a,.footer-col p{display:block;font-size:14px;color:#5B6B84;margin-bottom:10px}
.footer-col a:hover{color:var(--brand-600)}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--muted)}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand-600)}

/* ---------- to top ---------- */
.to-top{position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--sh2);display:grid;place-items:center;color:var(--brand-600);opacity:0;pointer-events:none;transform:translateY(10px);transition:all .22s ease;z-index:70}
.to-top.is-on{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

/* ---------- responsive ---------- */
@media (min-width:640px){
  .search-box{flex-direction:row}
  .search-box input{flex:1}
  .search-box .btn{flex:0 0 auto;min-width:132px}
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .cta-inner{flex-direction:row;align-items:center}
}
@media (min-width:1024px){
  :root{--sec:96px}
  .nav-side{display:flex}
  .nav-toggle{display:none}
  .mobile-panel{display:none!important}
  .page-head{padding:64px 0 80px}
  .page-head-grid{grid-template-columns:7fr 5fr;gap:48px}
  .hot-grid{grid-template-columns:5fr 7fr;gap:48px}
  .hot-band{padding:88px 0}
  .faq-columns{grid-template-columns:repeat(2,1fr)}
  .contact-card{grid-template-columns:1fr auto;padding:44px}
  .contact-actions{justify-content:flex-end}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr 1fr}
  .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center}
}
@media (min-width:1280px){
  .container{max-width:1200px}
}
@media (max-width:1023px){
  .brand-text{font-size:13.5px}
  .nav-grid{height:60px}
  .site-header{padding-top:0}
}
@media (max-width:767px){
  .page-head h1{font-size:26px}
  .head-stats{gap:18px}
  .faq-body{padding-left:0}
  .contact-card{padding:24px}
}

/* roulang page: category3 */
:root{
  --brand-50:#EEF3FE; --brand-100:#DCE6FD; --brand-200:#BDD0FA;
  --brand-500:#3A6BE8; --brand-600:#2554D6; --brand-700:#1B3FA8;
  --orange-50:#FFF3E8; --orange-500:#FF7A1A; --orange-600:#E9650A;
  --teal:#12A594; --teal-50:#E7F7F4; --red:#E5484D;
  --ink:#0F172A; --body:#334155; --muted:#64748B;
  --line:#E2E8F0; --soft:#F1F5F9; --bg-alt:#F7F9FC;
  --r-card:16px; --r-img:12px; --r-btn:10px; --r-block:24px;
  --shadow-1:0 1px 2px rgba(15,23,42,.05);
  --shadow-2:0 10px 24px -12px rgba(15,23,42,.18);
  --shadow-brand:0 16px 32px -16px rgba(37,84,214,.35);
  --sec-py:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:#fff;color:var(--body);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,p,ul,ol,figure,fieldset{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
a{color:var(--brand-600);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-700);}
::selection{background:var(--brand-100);color:var(--ink);}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:var(--sec-py) 0;}
.section-alt{background:var(--bg-alt);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-title{font-size:30px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:.2px;}
.section-desc{font-size:14px;color:var(--muted);margin-top:8px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand-600);background:var(--brand-50);border-radius:999px;padding:6px 14px;}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,filter .16s ease;}
.btn:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,23,42,.16);}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:#2149bd;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-brand);}
.btn-promo{background:var(--orange-500);color:#fff;}
.btn-promo:hover{background:var(--orange-600);color:#fff;transform:translateY(-1px);box-shadow:0 16px 32px -16px rgba(233,101,10,.5);}
.btn-outline{background:#fff;border-color:var(--brand-200);color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-700);}
.btn-pill{border-radius:999px;}
.btn-block{width:100%;}
.btn-sm{height:38px;font-size:14px;padding:0 16px;}
.btn[disabled]{opacity:.4;pointer-events:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);}
.link-arrow span{transition:transform .16s ease;}
.link-arrow:hover span{transform:translateX(2px);}

.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:700;line-height:1;}
.badge-new{background:var(--orange-500);color:#fff;}
.badge-time{background:var(--orange-50);color:var(--orange-600);}
.badge-brand{background:var(--brand-50);color:var(--brand-600);}
.badge-ok{background:var(--teal-50);color:var(--teal);}
.badge-cat{background:var(--soft);color:#475569;}

/* ---------- 顶部公告条 ---------- */
.announce{background:var(--orange-50);color:var(--orange-600);font-size:13px;height:34px;display:flex;align-items:center;position:relative;}
.announce .container{display:flex;align-items:center;gap:10px;}
.announce b{font-weight:700;}
.announce-close{position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:16px;line-height:1;color:var(--orange-600);opacity:.7;}
.announce-close:hover{opacity:1;}
.announce.is-hidden{display:none;}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:70;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease,background-color .2s ease;}
.site-header.is-scrolled{box-shadow:var(--shadow-1);background:#fff;}
.nav-grid{display:flex;align-items:center;height:72px;position:relative;}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{margin-right:auto;padding-right:210px;}
.nav-right{margin-left:auto;padding-left:210px;}
.nav-link{font-size:15px;font-weight:500;color:var(--body);padding:6px 2px;position:relative;}
.nav-link:hover{color:var(--brand-600);}
.nav-link.is-active{color:var(--brand-600);font-weight:700;}
.nav-link.is-active::after{content:"";position:absolute;left:2px;right:2px;bottom:-6px;height:2px;border-radius:2px;background:var(--brand-600);}
.brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:10px;}
.brand:hover .brand-text{color:var(--brand-600);}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand-600),var(--brand-500));color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:var(--shadow-brand);}
.brand-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.2px;transition:color .16s ease;}
.nav-cta{margin-left:6px;}
.nav-toggle{display:none;width:44px;height:44px;margin-left:auto;border-radius:10px;align-items:center;justify-content:center;}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);position:relative;border-radius:2px;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-panel{display:none;}
.mobile-panel.is-open{display:block;animation:panelIn .18s ease;}
@keyframes panelIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:translateY(0);}}
.m-row{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 20px;font-size:15px;color:var(--body);border-bottom:1px solid var(--soft);}
.m-row:last-of-type{border-bottom:0;}
.m-row:hover{background:var(--brand-50);color:var(--brand-600);}
.m-row.is-active{color:var(--brand-600);font-weight:700;}
.m-panel-cta{padding:16px 20px 20px;}

/* ---------- 面包屑 ---------- */
.crumb{padding:20px 0 0;font-size:14px;color:var(--muted);}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.crumb li{display:flex;align-items:center;gap:10px;}
.crumb li+li::before{content:"";width:1px;height:12px;background:var(--line);display:inline-block;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-600);}
.crumb .current{color:var(--ink);font-weight:600;}

/* ---------- 分类页头 ---------- */
.cat-hero{padding:32px 0 56px;}
.cat-hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;}
.cat-hero h1{font-size:clamp(28px,4vw,42px);line-height:1.25;font-weight:800;color:var(--ink);letter-spacing:.2px;margin:16px 0 14px;}
.cat-hero p.lead{font-size:16px;color:var(--body);max-width:520px;}
.cat-hero-media{position:relative;}
.cat-hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--shadow-2);}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:13px;font-weight:700;color:var(--ink);box-shadow:var(--shadow-2);}
.hero-tag em{font-style:normal;color:var(--orange-600);}
.cat-hero-facts{display:flex;flex-wrap:wrap;gap:28px;margin-top:26px;}
.cat-hero-facts div{min-width:104px;}
.cat-hero-facts b{display:block;font-size:24px;font-weight:800;color:var(--ink);}
.cat-hero-facts span{font-size:13px;color:var(--muted);}

/* ---------- 锚点条 ---------- */
.anchor-bar{position:sticky;top:72px;z-index:50;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.anchor-scroll{display:flex;gap:10px;align-items:center;padding:12px 0;overflow-x:auto;scrollbar-width:none;}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-chip{flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;background:var(--soft);color:#475569;font-size:14px;font-weight:600;transition:background-color .16s ease,color .16s ease;}
.anchor-chip:hover{background:var(--brand-50);color:var(--brand-600);}
.anchor-chip.is-on{background:var(--brand-600);color:#fff;}

/* ---------- 倒计时条 ---------- */
.countdown-band{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--r-block);padding:26px 28px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cd-left{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.cd-label-main{font-size:15px;font-weight:700;color:var(--ink);}
.cd-label-main small{display:block;font-size:13px;font-weight:500;color:var(--muted);margin-top:2px;}
.countdown{display:flex;gap:10px;}
.cd-block{width:64px;background:#fff;border-radius:12px;box-shadow:var(--shadow-1);padding:8px 0;text-align:center;}
.cd-num{display:block;font-size:24px;font-weight:800;color:var(--orange-600);line-height:1.15;}
.cd-unit{display:block;font-size:12px;color:var(--muted);}
.cd-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 优惠卡网格 ---------- */
.promo-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.promo-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:24px;display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;}
.promo-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-200);}
.promo-card .corner{position:absolute;top:-11px;left:22px;}
.promo-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);margin-bottom:18px;}
.promo-card h3{font-size:19px;font-weight:700;color:var(--ink);line-height:1.4;}
.promo-card .p-desc{font-size:14px;color:var(--muted);margin-top:8px;min-height:44px;}
.promo-points{display:flex;flex-direction:column;gap:8px;margin:16px 0;}
.promo-points li{display:flex;gap:8px;font-size:14px;color:var(--body);}
.promo-points li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-top:9px;}
.price-row{display:flex;align-items:flex-end;gap:10px;margin-top:auto;padding-top:16px;border-top:1px dashed var(--line);}
.price-row .now{font-size:32px;font-weight:800;color:var(--orange-500);line-height:1;}
.price-row .now i{font-style:normal;font-size:16px;font-weight:700;margin-right:2px;}
.price-row .was{font-size:14px;color:var(--muted);text-decoration:line-through;}
.valid-line{font-size:13px;color:var(--muted);margin:10px 0 16px;}

/* ---------- 对比小表 ---------- */
.cmp-wrap{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);background:#fff;}
.cmp-table{width:100%;border-collapse:collapse;}
.cmp-table th,.cmp-table td{padding:16px 20px;text-align:center;font-size:14px;border-bottom:1px solid var(--soft);}
.cmp-table thead th{background:var(--bg-alt);color:var(--ink);font-size:15px;font-weight:700;}
.cmp-table tbody th{text-align:left;color:var(--body);font-weight:600;background:#fff;}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-table .col-hot{background:var(--brand-50);}
.cmp-table thead .col-hot{background:var(--brand-100);color:var(--brand-700);}
.cmp-yes{color:var(--teal);font-weight:700;}
.cmp-no{color:#94A3B8;}
.cmp-cards{display:none;flex-direction:column;gap:16px;}

/* ---------- 规则折叠 ---------- */
.rule-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.rule-list details{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-1);overflow:hidden;}
.rule-list summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);}
.rule-list summary::-webkit-details-marker{display:none;}
.rule-list summary::before{content:counter(ruleIdx);counter-increment:ruleIdx;flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:700;display:grid;place-items:center;}
.rule-list{counter-reset:ruleIdx;}
.rule-list summary .chev{margin-left:auto;color:var(--muted);transition:transform .2s ease;}
.rule-list details[open] summary{background:var(--brand-50);}
.rule-list details[open] summary .chev{transform:rotate(180deg);}
.rule-body{padding:0 22px 22px 62px;font-size:15px;color:var(--body);}
.rule-body p+p{margin-top:10px;}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--brand-50);border-radius:var(--r-block);padding:48px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-band h2{font-size:28px;line-height:1.3;font-weight:700;color:var(--ink);}
.cta-band p{font-size:15px;color:var(--body);margin-top:10px;max-width:640px;}

/* ---------- 相关分类胶囊 ---------- */
.rel-band{background:var(--bg-alt);border-top:1px solid var(--line);padding:36px 0;}
.rel-flex{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.rel-flex strong{font-size:14px;color:var(--ink);font-weight:700;margin-right:4px;}
.rel-chip{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;background:#fff;border:1px solid var(--line);border-radius:999px;font-size:14px;font-weight:600;color:var(--body);}
.rel-chip:hover{border-color:var(--brand-200);color:var(--brand-600);box-shadow:var(--shadow-1);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:230px;}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.footer-col a{display:block;font-size:14px;color:#64748B;padding:5px 0;}
.footer-col a:hover{color:var(--brand-600);}
.footer-col p{font-size:14px;color:#64748B;padding:4px 0;}
.footer-bottom{margin-top:48px;border-top:1px solid var(--line);padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--brand-600);}

/* ---------- 回到顶部 ---------- */
#toTop{position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;background:#fff;box-shadow:var(--shadow-2);color:var(--brand-600);display:grid;place-items:center;opacity:0;pointer-events:none;transition:opacity .2s ease,background-color .2s ease,color .2s ease;z-index:80;}
#toTop.is-show{opacity:1;pointer-events:auto;}
#toTop:hover{background:var(--brand-600);color:#fff;}

@media (max-width:1279px){
  .nav-left{padding-right:170px;}
  .nav-right{padding-left:170px;}
}
@media (max-width:1023px){
  :root{--sec-py:72px;}
  .nav-side{display:none;}
  .nav-toggle{display:flex;}
  .nav-grid{height:60px;}
  .brand{position:static;transform:none;margin-right:auto;}
  .brand-text{font-size:15px;max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .cat-hero-grid{grid-template-columns:1fr;gap:28px;}
  .promo-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .anchor-bar{top:60px;}
  .cmp-table{display:none;}
  .cmp-cards{display:flex;}
  .cta-band{padding:36px;}
}
@media (max-width:767px){
  :root{--sec-py:56px;}
  .section-title{font-size:24px;}
  .cat-hero{padding:20px 0 40px;}
  .cat-hero h1{font-size:26px;}
  .promo-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .countdown-band{padding:20px;gap:18px;}
  .cd-block{width:56px;}
  .cd-num{font-size:20px;}
  .cta-band{padding:28px 22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .cat-hero-facts{gap:18px;}
  .cat-hero-facts b{font-size:20px;}
  .btn{height:44px;padding:0 18px;}
  .btn-block-mobile{width:100%;}
  .cd-actions{width:100%;}
  .cd-actions .btn{width:100%;}
  .rule-body{padding-left:22px;}
  .footer-grid{grid-template-columns:1fr;}
}