/* roulang page: index */
:root{
  --primary:#1D5FD0;
  --primary-hover:#16489F;
  --primary-tint:#E8F0FE;
  --accent:#FF7A2A;
  --accent-tint:#FFF1E7;
  --ink:#16202E;
  --muted:#5A6A80;
  --border:#E4EAF3;
  --divider:#EFF3F9;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --ok:#12A67A;
  --warn:#E8A33D;
  --err:#DC3B45;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(22,32,46,.04), 0 8px 24px rgba(29,95,208,.06);
  --sh-hover:0 2px 4px rgba(22,32,46,.05), 0 14px 32px rgba(29,95,208,.12);
  --sh-float:0 4px 8px rgba(22,32,46,.06), 0 22px 48px rgba(29,95,208,.16);
  --pad-sec:88px;
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",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);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:solid;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease,box-shadow .18s ease,transform .18s ease;}
a:hover{color:var(--primary-hover);}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:0;font-weight:700;color:var(--ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
::selection{background:var(--primary-tint);color:var(--primary-hover);}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.nums{font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--border);box-shadow:0 1px 2px rgba(22,32,46,.04),0 6px 18px rgba(29,95,208,.06);}
.nav-wrap{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:38px;height:38px;border-radius:10px;flex:0 0 auto;
  border:2px solid var(--primary);background:var(--primary-tint);
  color:var(--primary-hover);display:grid;place-items:center;
  font-weight:700;font-size:15px;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:700;color:var(--ink);}
.brand-text span{font-size:11.5px;color:var(--muted);letter-spacing:.02em;}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:auto;}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border:1px solid var(--border);border-radius:var(--r-pill);
  background:#fff;color:var(--muted);font-size:14.5px;font-weight:500;
  white-space:nowrap;
}
.chip:hover{border-color:rgba(29,95,208,.35);color:var(--primary);background:var(--bg);}
.chip.active{background:var(--primary-tint);border-color:rgba(29,95,208,.55);color:var(--primary-hover);font-weight:600;}
.nav-cta{margin-left:24px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;line-height:1;
  border:1px solid transparent;transition:all .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(29,95,208,.22);}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(29,95,208,.28);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(29,95,208,.2);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-tint);color:var(--primary-hover);}
.btn-ghost:active{transform:translateY(1px);}
.btn-warm{background:var(--accent);color:#fff;}
.btn-warm:hover{background:#E86A1C;color:#fff;transform:translateY(-1px);}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);
  border-radius:var(--r-btn);background:#fff;align-items:center;justify-content:center;
}
.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;}
.drawer{display:none;}

/* ============ 通用板块 ============ */
main{display:block;}
.section{padding:var(--pad-sec) 0;}
.section-tight{padding:64px 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.sec-title{font-size:27px;font-weight:600;position:relative;padding-left:16px;}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary);}
.sec-sub{color:var(--muted);font-size:15px;margin-top:10px;max-width:640px;}
.sec-link{font-size:15px;font-weight:600;white-space:nowrap;}
.sec-link::after{content:"→";margin-left:6px;transition:margin-left .18s ease;}
.sec-link:hover::after{margin-left:10px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--accent-tint);color:#B7521C;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  background:var(--primary-tint);color:var(--primary-hover);font-size:12.5px;font-weight:600;
}
.tag-warm{background:var(--accent-tint);color:#B7521C;}

/* ============ Hero ============ */
.hero{background:#fff;border-bottom:1px solid var(--divider);position:relative;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(to right,rgba(29,95,208,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(29,95,208,.05) 1px,transparent 1px);
  background-size:56px 56px;opacity:.5;pointer-events:none;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
}
.hero::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent) 55%,var(--primary-tint));}
.hero-grid{
  position:relative;display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;
  min-height:548px;padding:72px 0 76px;
}
.hero-copy h1{font-size:42px;font-weight:700;margin:20px 0 18px;max-width:15em;}
.hero-sub{font-size:17px;color:var(--muted);max-width:30em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.trust-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;margin-top:38px;
  border-top:1px solid var(--divider);padding-top:22px;
}
.trust-item{padding:0 22px;border-left:1px solid var(--divider);}
.trust-item:first-child{padding-left:0;border-left:0;}
.trust-item b{display:block;font-size:19px;font-weight:700;color:var(--primary-hover);}
.trust-item span{display:block;font-size:13px;color:var(--muted);margin-top:2px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--border);box-shadow:var(--sh-card);background:#E9EEF6;
}
.hero-flag{
  position:absolute;left:-14px;bottom:22px;display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-pill);
  padding:8px 16px 8px 8px;box-shadow:var(--sh-float);font-size:13.5px;font-weight:600;color:var(--ink);
}
.hero-flag i{
  width:28px;height:28px;border-radius:50%;background:var(--primary-tint);color:var(--primary-hover);
  display:grid;place-items:center;font-style:normal;font-weight:700;font-size:13px;
}

/* ============ 通道条 ============ */
.channel-bar{background:var(--ink);color:#D9E2F0;}
.channel-bar .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-top:0;padding-bottom:0;}
.channel-cell{padding:26px 24px 26px 0;border-right:1px dashed rgba(217,226,240,.18);}
.channel-cell:last-child{border-right:0;}
.channel-cell b{display:block;color:#fff;font-size:16px;font-weight:600;margin-bottom:6px;}
.channel-cell span{font-size:13.5px;line-height:1.7;color:#9FB0C6;display:block;}
.channel-cell em{font-style:normal;color:var(--accent);font-weight:700;margin-right:6px;font-variant-numeric:tabular-nums;}

/* ============ 三步上手 ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:32px;}
.steps::before{
  content:"";position:absolute;top:22px;left:6%;right:6%;height:2px;
  background-image:linear-gradient(to right,rgba(29,95,208,.35) 6px,transparent 6px);
  background-size:14px 2px;background-repeat:repeat-x;
}
.step{position:relative;background:transparent;padding-top:0;}
.step-num{
  position:relative;z-index:1;width:46px;height:46px;border-radius:50%;
  background:#fff;border:2px solid var(--primary);color:var(--primary-hover);
  display:grid;place-items:center;font-weight:700;font-size:17px;font-variant-numeric:tabular-nums;
  box-shadow:0 6px 16px rgba(29,95,208,.14);
}
.step h3{font-size:19px;font-weight:600;margin:20px 0 10px;}
.step p{color:var(--muted);font-size:15px;}
.step .mini-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;}
.step .mini-link::after{content:"↗";margin-left:5px;font-size:12px;}

/* ============ 图文案例 ============ */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:42px 0;border-top:1px solid var(--divider);}
.case-row:first-of-type{border-top:0;padding-top:0;}
.case-row.flip .case-media{order:2;}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--border);box-shadow:var(--sh-card);background:#E9EEF6;}
.case-body h3{font-size:22px;font-weight:600;margin:14px 0 12px;}
.case-body p{color:var(--muted);}
.case-points{margin-top:18px;display:grid;gap:10px;}
.case-points li{position:relative;padding-left:26px;font-size:15px;color:var(--ink);}
.case-points li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(-45deg);
}
.metric-strip{
  margin-top:16px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-card);overflow:hidden;
}
.metric{padding:26px 22px;border-left:1px solid var(--divider);}
.metric:first-child{border-left:0;}
.metric b{display:block;font-size:28px;font-weight:700;color:var(--primary-hover);font-variant-numeric:tabular-nums;}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted);}

/* ============ 资讯列表 ============ */
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.post-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);overflow:hidden;transition:all .2s ease;position:relative;
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(29,95,208,.3);box-shadow:var(--sh-hover);}
.post-link{display:block;color:inherit;height:100%;}
.post-link:hover{color:inherit;}
.post-cover{position:relative;background:#E9EEF6;}
.post-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.post-cover .tag{position:absolute;left:14px;top:14px;background:#fff;box-shadow:0 2px 8px rgba(22,32,46,.1);}
.post-body{padding:20px 22px 22px;}
.post-body h3{font-size:18px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{margin-top:10px;color:var(--muted);font-size:14.5px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--divider);font-size:13px;color:var(--muted);}
.post-meta .arrow{color:var(--primary);font-weight:700;transition:transform .18s ease;}
.post-card:hover .post-meta .arrow{transform:translateX(4px);}
.empty-state{
  grid-column:1/-1;background:#fff;border:1px dashed var(--border);border-radius:var(--r-lg);
  padding:52px 24px;text-align:center;color:var(--muted);
}
.empty-state .ph{
  width:96px;height:64px;margin:0 auto 18px;border-radius:var(--r-md);
  background:linear-gradient(180deg,#EDF2F9,#E4EAF3);border:1px solid var(--border);
}
.empty-state a{font-weight:600;display:inline-block;margin-top:12px;}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:320px 1fr;gap:56px;align-items:start;}
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--border);color:var(--primary);display:grid;place-items:center;
  font-size:18px;font-weight:500;transition:all .2s ease;
}
.faq-item[open] summary::after{content:"−";background:var(--primary-tint);border-color:rgba(29,95,208,.4);}
.faq-item summary:hover{color:var(--primary-hover);}
.faq-body{padding:0 4px 24px;color:var(--muted);line-height:1.85;font-size:15px;}
.faq-aside{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-card);padding:26px;}
.faq-aside h3{font-size:18px;font-weight:600;}
.faq-aside p{margin-top:10px;color:var(--muted);font-size:14.5px;}
.faq-aside ul{margin-top:18px;display:grid;gap:10px;font-size:14.5px;}
.faq-aside li{display:flex;gap:10px;align-items:flex-start;color:var(--ink);}
.faq-aside li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:9px;}

/* ============ CTA ============ */
.cta-band{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);padding:44px;display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;
}
.cta-band h2{font-size:26px;font-weight:600;}
.cta-band .lead{margin-top:14px;color:var(--muted);}
.cta-points{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;}
.lead-form{display:grid;gap:16px;}
.field{display:grid;gap:8px;}
.field label{font-size:14px;font-weight:600;color:var(--ink);}
.field input,.field textarea{
  width:100%;min-height:46px;padding:12px 14px;border:1px solid var(--border);
  border-radius:var(--r-btn);background:#fff;transition:all .18s ease;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:#9AA9BC;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(29,95,208,.12);
}
.field .hint{font-size:13px;color:var(--muted);}
.field.error input,.field.error textarea{border-color:var(--err);}
.field.error .hint{color:var(--err);}
.field.success input{border-color:var(--ok);}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--muted);}
.form-success{
  display:none;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--r-btn);
  background:rgba(18,166,122,.1);color:#0C7D5C;font-size:14px;font-weight:600;
}
.form-success.show{display:flex;}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;}
.footer-brand b{display:block;font-size:17px;font-weight:700;margin-bottom:12px;}
.footer-brand p{color:var(--muted);font-size:14.5px;max-width:30em;}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-col ul{display:grid;gap:12px;}
.footer-col a,.footer-col li{color:var(--muted);font-size:14.5px;}
.footer-col a:hover{color:var(--primary);}
.footer-col .addr{display:block;line-height:1.8;}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--divider);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--muted);
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{max-width:1120px;}
  .hero-grid{gap:40px;}
}
@media (max-width:1024px){
  :root{--pad-sec:64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;min-height:0;padding:56px 0 60px;}
  .hero-copy h1{font-size:34px;max-width:20em;}
  .hero-visual img{aspect-ratio:16/9;}
  .channel-bar .container{grid-template-columns:repeat(2,1fr);}
  .channel-cell{padding:22px 20px 22px 0;}
  .channel-cell:nth-child(2){border-right:0;}
  .channel-cell:nth-child(1),.channel-cell:nth-child(2){border-bottom:1px dashed rgba(217,226,240,.18);}
  .steps{grid-template-columns:1fr;gap:28px;}
  .steps::before{display:none;}
  .step{display:grid;grid-template-columns:46px 1fr;gap:18px;align-items:start;padding-bottom:24px;border-bottom:1px solid var(--divider);}
  .step h3{margin-top:6px;}
  .step-body{grid-column:2;}
  .case-row{grid-template-columns:1fr;gap:28px;padding:34px 0;}
  .case-row.flip .case-media{order:0;}
  .metric-strip{grid-template-columns:repeat(2,1fr);}
  .metric:nth-child(3){border-left:0;border-top:1px solid var(--divider);}
  .metric:nth-child(4){border-top:1px solid var(--divider);}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .nav-chips{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-cta{display:none;}
  .drawer{
    display:block;position:fixed;inset:64px 0 auto 0;z-index:55;
    background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--sh-float);
    padding:16px 24px 24px;transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .2s ease;
  }
  .drawer.open{transform:translateY(0);opacity:1;visibility:visible;}
  .drawer ul{display:grid;gap:4px;}
  .drawer a{
    display:flex;align-items:center;justify-content:space-between;min-height:48px;
    padding:0 14px;border-radius:var(--r-btn);color:var(--ink);font-size:15.5px;font-weight:500;border:1px solid transparent;
  }
  .drawer a:hover{background:var(--bg);color:var(--primary);}
  .drawer a.active{background:var(--primary-tint);border-color:rgba(29,95,208,.4);color:var(--primary-hover);font-weight:600;}
  .drawer a .arw{color:var(--muted);font-size:14px;}
  .drawer .btn{width:100%;margin-top:14px;}
}
@media (max-width:768px){
  :root{--pad-sec:48px;}
  .section-tight{padding:48px 0;}
  .container{padding:0 20px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
  .sec-title{font-size:22px;}
  .hero-copy h1{font-size:29px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .trust-bar{gap:0;}
  .trust-item{flex:1 1 50%;padding:0 16px;margin-bottom:14px;}
  .trust-item:nth-child(odd){padding-left:0;border-left:0;}
  .trust-item b{font-size:17px;}
  .post-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-band{padding:24px;}
  .case-body h3{font-size:19px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand-text span{display:none;}
  .channel-bar .container{grid-template-columns:1fr;}
  .channel-cell{border-right:0;border-bottom:1px dashed rgba(217,226,240,.18);padding:20px 0;}
  .channel-cell:last-child{border-bottom:0;}
  .metric-strip{grid-template-columns:1fr;}
  .metric{border-left:0;border-top:1px solid var(--divider);}
  .metric:first-child{border-top:0;}
  .hero-flag{left:8px;bottom:10px;font-size:12.5px;}
  .lead-form .form-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --primary:#1D5FD0;
  --primary-hover:#16489F;
  --primary-tint:#E8F0FE;
  --accent:#FF7A2A;
  --accent-tint:#FFF1E7;
  --text:#16202E;
  --text-2:#5A6A80;
  --text-3:#98A4B5;
  --border:#E4EAF3;
  --line:#EFF3F9;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --ok:#12A67A;
  --warn:#E8A33D;
  --err:#DC3B45;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 8px 24px rgba(29,95,208,.06);
  --shadow-hover:0 2px 4px rgba(22,32,46,.05), 0 14px 32px rgba(29,95,208,.12);
  --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:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;color:var(--text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:0 2px 10px rgba(22,32,46,.05);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:var(--r-btn);
  background:var(--primary);color:#fff;font-size:19px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:700;letter-spacing:0;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-2);letter-spacing:1px;}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:auto;}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--border);background:#fff;
  color:var(--text-2);font-size:14px;font-weight:500;white-space:nowrap;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.chip:hover{border-color:rgba(29,95,208,.2);color:var(--primary);background:#F5F8FC;}
.chip.active{background:rgba(29,95,208,.08);border-color:var(--primary);color:var(--primary);font-weight:600;}
.header-cta{margin-left:24px;flex:0 0 auto;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--border);
  background:#fff;border-radius:var(--r-btn);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:rgba(29,95,208,.3);background:#F5F8FC;}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-drawer{
  border-top:1px solid var(--line);background:#fff;
  padding:12px 24px 20px;display:flex;flex-direction:column;gap:4px;
}
.drawer-item{
  display:flex;align-items:center;justify-content:space-between;height:48px;
  padding:0 12px;border-radius:var(--r-btn);color:var(--text);font-size:15px;font-weight:500;
  border-bottom:1px solid var(--line);
}
.drawer-item:hover{background:#F5F8FC;color:var(--primary);}
.drawer-item .arw{color:var(--text-3);}
.drawer-cta{margin-top:12px;width:100%;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(29,95,208,.18);}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-tint);color:var(--primary-hover);}
.btn-ghost:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:24px 0 18px;font-size:13px;color:var(--text-2);
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .bc-cat{color:var(--text-2);}
.breadcrumb .bc-cur{color:var(--text-3);}

/* ---------- article ---------- */
.article-shell{
  max-width:840px;margin:0 auto 0;background:var(--card);
  border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);padding:40px 52px 48px;
}
.article-head{display:flex;flex-direction:column;gap:14px;}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;height:24px;
  padding:0 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:var(--primary-tint);color:var(--primary);
}
.article-head h1{font-size:34px;font-weight:700;line-height:1.32;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-2);}
.article-meta .dot{color:var(--text-3);}
.article-cover{margin:24px 0 0;}
.article-cover img{
  width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--border);background:#EEF2F8;
}
.article-body{
  max-width:760px;margin:32px auto 0;font-size:16px;line-height:1.85;color:var(--text);
}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:26px;font-weight:600;margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;width:4px;height:22px;border-radius:2px;background:var(--primary);
}
.article-body h3{font-size:19px;font-weight:600;margin:32px 0 12px;}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 1.2em;}
.article-body ul{padding-left:20px;}
.article-body ul li{position:relative;padding-left:16px;margin-bottom:8px;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--primary);
}
.article-body ol{padding-left:24px;list-style:decimal;}
.article-body ol li{margin-bottom:8px;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--bg);
  border-left:3px solid var(--primary);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{max-width:100%;height:auto;border-radius:var(--r-md);border:1px solid var(--border);margin:24px auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-2);margin-top:8px;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-hover);}
.article-body table{
  width:100%;border-collapse:collapse;display:block;overflow-x:auto;
  font-size:15px;margin:24px 0;
}
.article-body table th,.article-body table td{
  border:1px solid var(--border);padding:10px 14px;text-align:left;white-space:nowrap;
}
.article-body table th{background:var(--bg);font-weight:600;}
.article-body table tbody tr:nth-child(even){background:#FAFCFF;}
.article-body code{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:2px 6px;font-size:14px;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* ---------- empty state ---------- */
.empty-state{
  text-align:center;padding:40px 20px;background:var(--bg);
  border:1px dashed var(--border);border-radius:var(--r-lg);
}
.empty-state .empty-title{font-size:20px;font-weight:600;margin-bottom:8px;}
.empty-state .empty-desc{color:var(--text-2);font-size:15px;margin-bottom:20px;}

/* ---------- article foot ---------- */
.article-foot{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
  max-width:760px;margin:40px auto 0;padding-top:24px;border-top:1px solid var(--line);
}
.foot-card{
  display:flex;flex-direction:column;gap:6px;padding:16px 18px;
  border:1px solid var(--border);border-radius:var(--r-md);background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.foot-card:hover{border-color:rgba(29,95,208,.15);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.foot-card .fc-k{font-size:12px;color:var(--text-2);}
.foot-card .fc-t{font-size:16px;font-weight:600;color:var(--text);}

/* ---------- related ---------- */
.related{max-width:840px;margin:32px auto 0;}
.related h2{font-size:20px;margin-bottom:14px;}
.related-list{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.related-list li + li{border-top:1px solid var(--line);}
.related-list a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;color:var(--text);font-size:15px;font-weight:500;
  transition:background .18s ease,color .18s ease;
}
.related-list a:hover{background:var(--bg);color:var(--primary);}
.related-list .arw{color:var(--text-3);flex:0 0 auto;}

/* ---------- CTA band ---------- */
.cta-band{margin-top:64px;padding:40px 0 8px;}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);padding:32px 36px;
}
.cta-inner h2{font-size:24px;margin-bottom:8px;}
.cta-inner p{color:var(--text-2);font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{margin-top:72px;background:#fff;border-top:1px solid var(--border);}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;
  padding:56px 0 32px;
}
.footer-brand b{display:block;font-size:17px;font-weight:700;margin-bottom:10px;}
.footer-brand p{color:var(--text-2);font-size:14px;line-height:1.8;max-width:380px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:var(--text-2);font-size:14px;transition:color .18s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-col .addr{color:var(--text-2);font-size:13px;line-height:1.7;display:block;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 0 28px;border-top:1px solid var(--line);
  color:var(--text-2);font-size:13px;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .header-cta{margin-left:16px;}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:20px;}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;gap:28px;}
}
@media (max-width:900px){
  .nav-chips{display:none;}
  .header-cta{display:none;}
  .nav-toggle{display:flex;}
  .article-shell{padding:32px 28px 36px;}
  .article-head h1{font-size:30px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .article-head h1{font-size:27px;}
  .article-body{font-size:15px;line-height:1.85;}
  .article-body h2{font-size:21px;margin:32px 0 14px;}
  .article-body h3{font-size:17px;margin:26px 0 10px;}
  .article-foot{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:40px 0 24px;}
  .footer-brand{grid-column:1 / -1;}
  .cta-band{margin-top:48px;}
  .cta-inner{padding:24px 20px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
}
@media (max-width:520px){
  .brand-text em{display:none;}
  .article-shell{padding:24px 18px 28px;border-radius:var(--r-md);}
  .article-head h1{font-size:24px;}
  .article-meta{font-size:12px;gap:8px;}
  .article-cover{margin-top:18px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .related-list a{padding:14px 16px;font-size:14px;}
}

/* roulang page: category1 */
:root{
  --primary:#1D5FD0;
  --primary-hover:#16489F;
  --primary-tint:#E8F0FE;
  --primary-08:rgba(29,95,208,.08);
  --primary-15:rgba(29,95,208,.15);
  --primary-20:rgba(29,95,208,.20);
  --accent:#FF7A2A;
  --accent-tint:#FFF1E7;
  --ink:#16202E;
  --muted:#5A6A80;
  --line:#E4EAF3;
  --divider:#EFF3F9;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --success:#12A67A;
  --success-tint:rgba(18,166,122,.10);
  --warn:#E8A33D;
  --warn-tint:rgba(232,163,61,.10);
  --error:#DC3B45;
  --error-tint:rgba(220,59,69,.10);
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(22,32,46,.04), 0 8px 24px rgba(29,95,208,.06);
  --sh-hover:0 2px 4px rgba(22,32,46,.05), 0 14px 32px rgba(29,95,208,.12);
  --sh-pop:0 4px 8px rgba(22,32,46,.06), 0 24px 48px rgba(29,95,208,.16);
  --sp:8px;
  --font:-apple-system, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", 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);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--card);
  letter-spacing:0;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-hover);}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;letter-spacing:0;}
p{margin:0 0 16px;text-indent:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}
@media (max-width:1024px){.container{padding:0 20px;}}
@media (max-width:520px){.container{padding:0 16px;}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(22,32,46,.04), 0 8px 24px rgba(29,95,208,.06);
}
.header-inner{
  display:flex;align-items:center;
  height:64px;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  flex:0 0 auto;
  box-shadow:0 4px 12px rgba(29,95,208,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text b{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:0;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);margin-top:2px;}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:auto;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#fff;color:var(--muted);
  font-size:14px;font-weight:500;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
  white-space:nowrap;
}
.chip:hover{background:var(--bg);border-color:var(--primary-20);color:var(--primary);}
.chip.active{
  background:var(--primary-08);
  border-color:var(--primary);
  color:var(--primary);
  font-weight:600;
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:24px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .16s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(29,95,208,.22);}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(29,95,208,.26);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(29,95,208,.20);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-08);color:var(--primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;
  color:var(--ink);
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--primary-20);background:var(--bg);}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s ease,top .2s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:12px 0 20px;
  box-shadow:var(--sh-pop);
}
.mobile-drawer.open{display:block;}
.mobile-drawer ul{display:flex;flex-direction:column;}
.mobile-drawer li a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 24px;
  color:var(--ink);font-size:15px;font-weight:500;
  border-bottom:1px solid var(--divider);
}
.mobile-drawer li a::after{content:"›";color:var(--muted);font-size:18px;line-height:1;}
.mobile-drawer li a.active{color:var(--primary);background:var(--primary-08);}
.mobile-drawer .drawer-cta{padding:16px 24px 0;}
.mobile-drawer .drawer-cta .btn{width:100%;}
@media (max-width:1024px){
  .brand-text em{display:none;}
}
@media (max-width:768px){
  .nav-chips{display:none;}
  .header-actions .btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:56px;gap:12px;}
  .header-actions{margin-left:auto;}
}

/* ---------- 小 Hero ---------- */
.page-hero{
  position:relative;
  background:var(--bg);
  border-top:1px solid rgba(29,95,208,.18);
  border-bottom:1px solid var(--line);
  padding:56px 0 52px;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(29,95,208,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29,95,208,.045) 1px, transparent 1px);
  background-size:52px 52px;
}
.page-hero .container{position:relative;z-index:1;}
.pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--primary-08);color:var(--primary);
  font-size:12px;font-weight:600;letter-spacing:0;
  margin-bottom:16px;
}
.page-hero h1{
  font-size:clamp(28px,3.4vw,40px);
  font-weight:700;
  max-width:900px;
  margin-bottom:14px;
}
.page-hero .hero-sub{
  font-size:17px;color:var(--muted);
  max-width:720px;margin:0;
}
@media (max-width:768px){
  .page-hero{padding:40px 0 36px;}
  .page-hero .hero-sub{font-size:15px;}
}

/* ---------- 面包屑 ---------- */
.breadcrumb-wrap{border-bottom:1px solid var(--divider);background:#fff;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding:14px 0;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#C3CEDD;}
.breadcrumb .current{color:#93A1B5;}

/* ---------- 主体两栏 ---------- */
.layout{
  display:grid;
  grid-template-columns:3fr 9fr;
  gap:40px;
  align-items:start;
  padding:48px 0 16px;
}
.toc{
  position:sticky;top:88px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:20px;
  box-shadow:var(--sh-card);
}
.toc-title{
  font-size:13px;font-weight:600;color:var(--muted);
  letter-spacing:.04em;
  padding-bottom:12px;margin-bottom:8px;
  border-bottom:1px solid var(--divider);
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;
  border-radius:var(--r-sm);
  font-size:14px;color:var(--muted);
  border-left:2px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.toc-list a:hover{background:var(--bg);color:var(--primary);}
.toc-list a.active{
  background:var(--primary-08);
  color:var(--primary);
  font-weight:600;
  border-left-color:var(--primary);
}
.toc-list a .idx{
  font-size:12px;color:#A9B6C8;font-weight:600;min-width:16px;
}
.toc-list a.active .idx{color:var(--primary);}
.content{min-width:0;}

/* ---------- 内容节 ---------- */
.doc-section{
  padding-bottom:40px;
  margin-bottom:40px;
  border-bottom:1px solid var(--divider);
  scroll-margin-top:90px;
}
.doc-section:last-of-type{border-bottom:0;margin-bottom:8px;}
.doc-section h2{
  position:relative;
  font-size:clamp(21px,2vw,26px);
  font-weight:600;
  padding-left:14px;
  margin-bottom:20px;
}
.doc-section h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;
  border-radius:2px;background:var(--primary);
}
.doc-section h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.doc-section p{color:#31445C;}
.doc-lead{font-size:16px;color:var(--muted);}

.num-list{counter-reset:none;margin:8px 0 20px;}
.num-list li{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:16px;
  padding:18px 0;
  border-bottom:1px solid var(--divider);
}
.num-list li:first-child{border-top:1px solid var(--divider);}
.num-list .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:var(--r-sm);
  background:var(--primary-08);color:var(--primary);
  font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.num-list.warm .num{background:var(--accent-tint);color:#D9601A;}
.num-list p{margin:0;color:var(--muted);font-size:15px;}
.num-list h3{font-size:17px;margin-bottom:6px;}

.doc-figure{margin:24px 0 8px;}
.doc-figure img{
  width:100%;border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg);
  aspect-ratio:16/9;object-fit:cover;
}
.doc-figure figcaption{
  text-align:center;font-size:13px;color:var(--muted);margin-top:10px;
}
.callout{
  background:var(--bg);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:16px 20px;
  margin:20px 0;
  color:#31445C;
  font-size:15px;
}
.callout strong{color:var(--ink);}

/* ---------- FAQ ---------- */
.faq-list{margin-top:4px;}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:first-child{border-top:1px solid var(--divider);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 2px;
  font-size:17px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
  transition:color .18s ease;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--primary);}
.faq-q::after{
  content:"+";
  flex:0 0 auto;
  width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-08);color:var(--primary);
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .2s ease,background .2s ease;
}
.faq-item[open] .faq-q::after{content:"−";background:var(--primary);color:#fff;}
.faq-a{padding:0 2px 20px;color:var(--muted);font-size:15px;line-height:1.8;}

/* ---------- 交叉链接 ---------- */
.crosslinks{padding:8px 0 48px;}
.cross-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;margin-top:20px;
}
.cross-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  color:var(--ink);
}
.cross-card:hover{
  transform:translateY(-2px);
  border-color:var(--primary-15);
  box-shadow:var(--sh-hover);
  color:var(--ink);
}
.cross-card .thumb{background:var(--bg);aspect-ratio:16/9;overflow:hidden;}
.cross-card .thumb img{width:100%;height:100%;object-fit:cover;}
.cross-body{padding:20px 22px 22px;}
.cross-body .badge{margin-bottom:12px;}
.cross-body h3{font-size:19px;margin-bottom:8px;}
.cross-body p{color:var(--muted);font-size:14px;margin:0;}
.cross-body .more{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:16px;font-size:14px;font-weight:600;color:var(--primary);
}
.cross-card:hover .more span{transform:translateX(3px);}
.cross-body .more span{transition:transform .2s ease;display:inline-block;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:6px;
  background:var(--primary-08);color:var(--primary);
  font-size:12px;font-weight:600;
}
.badge.warm{background:var(--accent-tint);color:#D9601A;}

/* ---------- CTA 条 ---------- */
.cta-band{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background-image:linear-gradient(rgba(245,248,252,.95),rgba(245,248,252,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  padding:40px;
  margin-bottom:64px;
  box-shadow:var(--sh-card);
}
.cta-inner{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:40px;
  align-items:start;
}
.cta-inner h2{font-size:clamp(21px,2vw,26px);margin-bottom:12px;}
.cta-inner .cta-desc{color:var(--muted);font-size:15px;margin:0 0 20px;}
.cta-points{display:flex;flex-direction:column;gap:10px;}
.cta-points li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:#31445C;
}
.cta-points li::before{
  content:"";flex:0 0 auto;
  width:16px;height:16px;margin-top:4px;border-radius:50%;
  background:var(--success-tint);
  border:1px solid rgba(18,166,122,.35);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.4l3 3 6-6.4' fill='none' stroke='%2312A67A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size:12px;background-position:center;background-repeat:no-repeat;
}
.cta-form{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh-card);
}
.field{margin-bottom:16px;}
.field label{
  display:block;font-size:13px;font-weight:600;color:var(--muted);
  margin-bottom:6px;
}
.field input,.field select,.field textarea{
  width:100%;
  min-height:46px;
  padding:11px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:#fff;
  color:var(--ink);
  font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
  appearance:none;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7;}
.field select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5l5-5' fill='none' stroke='%235A6A80' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  background-size:12px;
  padding-right:36px;
}
.field input::placeholder,.field textarea::placeholder{color:#A9B6C8;}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#CFDAE8;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(29,95,208,.12);
}
.field.error input,.field.error textarea{border-color:var(--error);box-shadow:0 0 0 3px var(--error-tint);}
.field.success input,.field.success textarea{border-color:var(--success);box-shadow:0 0 0 3px var(--success-tint);}
.field-msg{font-size:13px;margin:6px 0 0;color:var(--muted);min-height:0;}
.field.error .field-msg{color:var(--error);}
.field.success .field-msg{color:var(--success);}
.form-foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:4px;}
.form-foot .btn{flex:1 1 auto;min-width:140px;}
.form-note{font-size:12px;color:#93A1B5;margin:12px 0 0;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#fff;
  border-top:1px solid var(--line);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:32px;
}
.footer-brand b{display:block;font-size:17px;font-weight:700;margin-bottom:12px;}
.footer-brand p{color:var(--muted);font-size:14px;margin:0;max-width:340px;line-height:1.8;}
.footer-col h4{
  font-size:15px;font-weight:600;margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  color:var(--muted);font-size:14px;
  transition:color .18s ease;
  display:inline-block;min-height:22px;
}
.footer-col a:hover{color:var(--primary);}
.footer-col .addr{color:var(--muted);font-size:13px;line-height:1.7;display:block;}
.footer-bottom{
  margin-top:44px;
  border-top:1px solid var(--divider);
  padding:20px 0 26px;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
@media (max-width:1024px){
  .layout{grid-template-columns:1fr;gap:28px;padding:32px 0 8px;}
  .toc{position:static;padding:14px 16px;border-radius:var(--r-md);}
  .toc-title{padding-bottom:10px;margin-bottom:10px;}
  .toc-list{
    flex-direction:row;gap:8px;overflow-x:auto;
    padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    mask-image:linear-gradient(to right,#000 88%,transparent 100%);
    -webkit-mask-image:linear-gradient(to right,#000 88%,transparent 100%);
  }
  .toc-list::-webkit-scrollbar{display:none;}
  .toc-list a{
    white-space:nowrap;
    border-left:0;
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    padding:7px 14px;
  }
  .toc-list a.active{border-color:var(--primary);}
  .toc-list a .idx{display:none;}
  .crosslinks{padding-bottom:36px;}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:32px 24px;margin-bottom:48px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  .doc-section{padding-bottom:32px;margin-bottom:32px;}
  .num-list li{grid-template-columns:40px 1fr;gap:12px;padding:16px 0;}
  .cross-grid{grid-template-columns:1fr;gap:20px;}
  .faq-q{font-size:16px;padding:16px 2px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (max-width:520px){
  .doc-section h2{font-size:21px;}
  .cta-band{padding:26px 18px;}
  .cta-form{padding:20px 16px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .page-hero h1{font-size:28px;}
}

/* roulang page: category2 */
:root{
  --primary:#1D5FD0;
  --primary-hover:#16489F;
  --primary-tint:#E8F0FE;
  --accent:#FF7A2A;
  --accent-tint:#FFF1E7;
  --ink:#16202E;
  --muted:#5A6A80;
  --border:#E4EAF3;
  --line:#EFF3F9;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --ok:#12A67A;
  --warn:#E8A33D;
  --err:#DC3B45;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(22,32,46,.04), 0 8px 24px rgba(29,95,208,.06);
  --sh-hover:0 2px 4px rgba(22,32,46,.05), 0 14px 32px rgba(29,95,208,.12);
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",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);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary-hover)}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--card);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.scrolled{border-bottom-color:var(--border);box-shadow:0 1px 2px rgba(22,32,46,.04),0 8px 24px rgba(29,95,208,.06)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:700;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:15px;color:var(--ink);font-weight:700}
.brand-text i{font-style:normal;font-size:11px;color:var(--muted)}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:12px}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--border);background:#fff;
  color:var(--muted);font-size:14px;font-weight:500;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.chip:hover{background:var(--bg);border-color:rgba(29,95,208,.2);color:var(--primary)}
.chip.active{background:rgba(29,95,208,.08);border-color:var(--primary);color:var(--primary);font-weight:600}
.header-cta{margin-left:auto;display:flex;align-items:center;gap:12px}
.menu-btn{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--border);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .18s ease,background-color .18s ease;
}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:background-color .18s ease}
.menu-btn:hover{border-color:rgba(29,95,208,.24);background:var(--bg)}
.menu-btn[aria-expanded="true"]{background:var(--primary-tint);border-color:var(--primary)}
.menu-btn[aria-expanded="true"] span{background:var(--primary)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.open{display:block}
.mobile-drawer .drawer-inner{padding:8px 0 20px}
.mobile-drawer ul li a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 4px;font-size:15px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-drawer ul li a::after{content:"›";color:var(--muted);font-size:18px;line-height:1}
.mobile-drawer ul li a.active{color:var(--primary);font-weight:600}
.mobile-drawer ul li a.active::after{color:var(--primary)}
.drawer-cta{margin-top:18px}
.drawer-cta .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(29,95,208,.18)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:rgba(29,95,208,.08);color:var(--primary-hover)}
.btn-ghost:active{background:rgba(29,95,208,.14)}
.btn-sm{height:40px;min-height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 小 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--bg) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--border);
}
.page-hero::before{content:"";position:absolute;inset:0;background:rgba(245,248,252,.92)}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(29,95,208,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(29,95,208,.05) 1px,transparent 1px);
  background-size:34px 34px;
}
.page-hero-inner{position:relative;z-index:2;padding:66px 24px 58px}
.eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--accent-tint);color:#B44A0C;
  font-size:12px;font-weight:600;
}
.page-hero h1{font-size:38px;font-weight:700;margin:16px 0 14px;max-width:800px}
.hero-sub{font-size:16px;color:var(--muted);max-width:680px;line-height:1.8}
.hero-meta{display:flex;flex-wrap:wrap;margin-top:24px}
.hero-meta span{position:relative;padding:0 16px;font-size:13px;color:var(--muted)}
.hero-meta span:first-child{padding-left:0}
.hero-meta span + span::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:var(--border);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;padding:15px 0;font-size:13px;color:var(--muted)}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li:not(:last-child)::after{content:"/";margin:0 10px;color:#C6D2E4}
.breadcrumb li[aria-current] {color:var(--muted)}
.breadcrumb li a{color:var(--muted)}
.breadcrumb li a:hover{color:var(--primary)}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:28px;font-weight:600}
.section-head p{margin-top:12px;color:var(--muted);font-size:16px}
.section-title{font-size:28px;font-weight:600;margin-bottom:32px}

/* ---------- 步骤大卡 ---------- */
.step-list{display:flex;flex-direction:column;gap:22px}
.step-card{
  display:grid;grid-template-columns:96px 1fr;gap:24px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);padding:28px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-2px);border-color:rgba(29,95,208,.15);box-shadow:var(--sh-hover)}
.step-no{
  font-size:46px;font-weight:700;line-height:1;color:rgba(29,95,208,.12);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.step-body h3{font-size:20px;font-weight:600}
.step-body > p{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.85}
.step-body > p:first-of-type{color:#3C4A5E}
.step-figure{
  margin:20px 0 0;border:1px solid var(--border);border-radius:var(--r-md);
  overflow:hidden;background:var(--bg);
}
.step-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.step-figure figcaption{padding:11px 16px;font-size:13px;color:var(--muted);background:#fff;border-top:1px solid var(--line)}

/* ---------- 章节左右导航 ---------- */
.step-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px}
.step-nav-item{
  display:flex;flex-direction:column;gap:6px;padding:20px 22px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--sh-card);color:var(--ink);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-nav-item:hover{transform:translateY(-2px);border-color:rgba(29,95,208,.2);box-shadow:var(--sh-hover);color:var(--ink)}
.step-nav-item.next{text-align:right}
.step-nav-label{font-size:12px;color:var(--muted)}
.step-nav-title{font-size:15px;font-weight:600;color:var(--ink)}

/* ---------- 卡点速查 ---------- */
.check-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.check-layout{display:grid;grid-template-columns:320px 1fr;gap:48px;align-items:start}
.check-intro h2{font-size:26px;font-weight:600}
.check-intro p{margin-top:14px;color:var(--muted);font-size:15px;line-height:1.85}
.check-list li{
  display:grid;grid-template-columns:36px 1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.check-list li:first-child{padding-top:0}
.check-list li:last-child{border-bottom:0;padding-bottom:0}
.check-num{
  width:32px;height:32px;border-radius:var(--r-sm);background:var(--primary-tint);
  color:var(--primary);display:grid;place-items:center;font-size:13px;font-weight:700;
}
.check-item h3{font-size:17px;font-weight:600}
.check-item p{margin-top:8px;color:var(--muted);font-size:15px;line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding:16px 4px;font-size:17px;font-weight:600;
  color:var(--ink);cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--primary-tint);color:var(--primary);
  display:grid;place-items:center;font-size:16px;font-weight:600;line-height:1;
  transition:background-color .2s ease,color .2s ease;
}
.faq-item[open] summary::after{content:"−";background:var(--primary);color:#fff}
.faq-answer{padding:0 4px 22px;color:var(--muted);font-size:15px;line-height:1.85;max-width:760px}

/* ---------- 交叉链接 ---------- */
.cross-section{background:var(--bg)}
.cross-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cross-card{
  display:flex;flex-direction:column;gap:10px;padding:26px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);color:var(--ink);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.cross-card:hover{transform:translateY(-2px);border-color:rgba(29,95,208,.2);box-shadow:var(--sh-hover);color:var(--ink)}
.cross-tag{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);background:var(--primary-tint);color:var(--primary);
  font-size:12px;font-weight:600;
}
.cross-card h3{font-size:19px;font-weight:600}
.cross-card p{color:var(--muted);font-size:15px;line-height:1.8}
.cross-more{margin-top:6px;font-size:14px;font-weight:600;color:var(--primary)}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:40px;border:1px solid var(--border);border-radius:var(--r-lg);
  background:#fff;
  background-image:linear-gradient(90deg,rgba(29,95,208,.06),rgba(255,122,42,.05));
  box-shadow:var(--sh-card);
}
.cta-text h2{font-size:24px;font-weight:600}
.cta-text p{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px;line-height:1.8}
.cta-actions{display:flex;gap:12px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--border);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand b{display:block;font-size:17px;font-weight:700}
.footer-brand p{margin-top:12px;color:var(--muted);font-size:14px;line-height:1.85;max-width:330px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li:last-child{margin-bottom:0}
.footer-col ul li a{color:var(--muted);font-size:14px;display:inline-flex;min-height:24px;align-items:center}
.footer-col ul li a:hover{color:var(--primary)}
.addr{display:block;color:var(--muted);font-size:13px;line-height:1.75}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:20px 0;border-top:1px solid var(--line);color:var(--muted);font-size:13px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:64px 0}
  .page-hero h1{font-size:34px}
  .check-layout{grid-template-columns:1fr;gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:32px}
}
@media (max-width:860px){
  .nav-chips,.header-cta .btn{display:none}
  .menu-btn{display:flex}
  .header-inner{gap:12px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .page-hero-inner{padding:48px 20px 42px}
  .page-hero h1{font-size:29px}
  .hero-sub{font-size:15px}
  .section{padding:48px 0}
  .section-head h2,.section-title{font-size:22px}
  .check-intro h2{font-size:21px}
  .step-card{grid-template-columns:1fr;gap:12px;padding:22px}
  .step-no{font-size:34px}
  .step-body h3{font-size:18px}
  .step-nav{grid-template-columns:1fr;gap:14px;margin-top:30px}
  .step-nav-item.next{text-align:left}
  .cross-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px;gap:22px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .faq-item summary{font-size:16px;min-height:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .site-footer{padding-top:48px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .page-hero h1{font-size:26px}
  .hero-meta span{padding:0 10px;font-size:12px}
  .btn{height:44px;font-size:14px;padding:0 18px}
  .brand-text i{display:none}
  .footer-bottom{flex-direction:column;gap:8px}
}