/* roulang page: index */
:root{
  --ink:#101A2E;--muted:#5B6880;--brand:#2C56C4;--brand-600:#22449E;--brand-50:#EEF3FE;
  --accent:#E0813A;--accent-50:#FCF1E7;--line:#E3E8F2;--line-strong:#CFDAF0;
  --bg:#FFFFFF;--bg-soft:#F6F8FC;--bg-warm:#FBFAF7;
  --radius:16px;--radius-lg:24px;--radius-sm:10px;
  --shadow:0 1px 2px rgba(16,26,46,.04),0 8px 24px -12px rgba(16,26,46,.10);
  --shadow-hover:0 14px 32px -14px rgba(16,26,46,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-soft{background:var(--bg-soft)}
.section-warm{background:var(--bg-warm)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s var(--ease)}
.site-header.scrolled{box-shadow:0 8px 22px -16px rgba(16,26,46,.35)}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:baseline;gap:6px;font-size:19px;font-weight:700;letter-spacing:.2px;color:var(--ink);white-space:nowrap}
.brand:hover .brand-mark{color:var(--brand)}
.brand-mark{transition:color .18s var(--ease)}
.brand-sub{font-size:12px;font-weight:500;color:var(--muted);letter-spacing:.4px}
.main-nav{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--muted);transition:color .18s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:18px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink);margin-left:auto;transition:border-color .18s var(--ease),color .18s var(--ease)}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:12px 0 20px}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:block;padding:12px 0;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:600;line-height:1;transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(34,68,158,.9)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand)}
.text-link i{transition:transform .2s var(--ease)}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}
.text-link:hover i{transform:translateX(4px)}

/* ---------- Badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;background:var(--brand-50);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.3px}
.badge-accent{background:var(--accent-50);color:var(--accent)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;background:var(--accent-50);color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.4px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:76px 0 84px;background:radial-gradient(120% 90% at 8% 0%,rgba(44,86,196,.055),rgba(255,255,255,0) 62%)}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.hero-copy{grid-column:span 7}
.hero-media{grid-column:span 5;position:relative}
.hero-title{font-size:clamp(28px,4.6vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.6px;margin:18px 0 0}
.hero-title .hl{color:var(--brand)}
.hero-sub{max-width:560px;margin:18px 0 0;font-size:18px;line-height:1.8;color:var(--muted)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-trust{display:flex;flex-wrap:wrap;align-items:center;gap:0;margin-top:30px;font-size:13px;color:var(--muted)}
.hero-trust span{padding:0 16px;line-height:1.4}
.hero-trust span:first-child{padding-left:0}
.hero-trust span+span{border-left:1px solid var(--line)}
.hero-media img{width:100%;height:420px;object-fit:cover;border-radius:20px}
.stat-float{position:absolute;left:-14px;bottom:26px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;box-shadow:var(--shadow);min-width:190px}
.stat-float-num{font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--brand);line-height:1.3}
.stat-float-text{font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:2px}

/* ---------- Claim bar ---------- */
.claim-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.claim-list{display:grid;grid-template-columns:repeat(4,1fr);padding:22px 0}
.claim-item{padding:0 18px;font-size:15px;color:var(--muted);text-align:center;border-left:1px solid var(--line)}
.claim-item:first-child{border-left:0}
.claim-item b{color:var(--ink);font-weight:600}

/* ---------- Section head ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-title{font-size:30px;font-weight:700;line-height:1.35;margin:0;letter-spacing:-.3px}
.section-sub{margin:10px 0 0;font-size:16px;color:var(--muted);max-width:640px}

/* ---------- Story ---------- */
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.story-block{margin-bottom:34px}
.story-block:last-child{margin-bottom:0}
.story-num{font-size:13px;font-weight:700;letter-spacing:1.4px;color:var(--accent);font-variant-numeric:tabular-nums}
.story-h{font-size:22px;font-weight:700;line-height:1.45;margin:8px 0 10px}
.story-p{margin:0;font-size:16px;line-height:1.85;color:var(--muted)}
.story-media img{width:100%;height:420px;object-fit:cover;border-radius:var(--radius)}

/* ---------- Feature cards ---------- */
.feature-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:24px}
.feature-aside{display:grid;gap:24px;align-content:start}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);display:block}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.card:hover .card-title{color:var(--brand)}
.card-img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-body{padding:24px}
.card-title{font-size:20px;font-weight:700;line-height:1.5;margin:12px 0 0;transition:color .2s var(--ease);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-desc{margin:10px 0 0;font-size:15px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;font-size:13px;color:var(--muted)}
.mini-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:block;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
.mini-card:hover{transform:translateY(-2px);border-color:var(--line-strong);background:#fff;box-shadow:var(--shadow-hover)}
.mini-card:hover .mini-title{color:var(--brand)}
.mini-title{font-size:18px;font-weight:700;line-height:1.5;margin:12px 0 0;transition:color .2s var(--ease)}
.mini-desc{margin:8px 0 0;font-size:14.5px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- News list ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 44px}
.news-item{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);transition:transform .2s var(--ease)}
.news-item:hover{transform:translateY(-2px)}
.news-item:hover .news-title{color:var(--brand)}
.news-thumb{flex:none;width:160px;height:110px;border-radius:12px;object-fit:cover;background:var(--bg-soft)}
.news-body{min-width:0}
.news-title{font-size:17px;font-weight:600;line-height:1.55;margin:8px 0 0;transition:color .2s var(--ease);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{margin:6px 0 0;font-size:14px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.news-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:13px}
.news-item:hover .news-link i{transform:translateX(4px)}
.news-link i{transition:transform .2s var(--ease)}
.empty-state{border:1px dashed var(--line);border-radius:var(--radius);padding:52px 24px;text-align:center;color:var(--muted)}
.empty-state i{font-size:26px;color:var(--line-strong);display:block;margin-bottom:12px}
.empty-state p{margin:0 0 18px;font-size:15px}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.step:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.step-num{font-size:13px;font-weight:700;letter-spacing:1.2px;color:var(--accent);font-variant-numeric:tabular-nums}
.step-title{font-size:18px;font-weight:700;margin:10px 0 8px}
.step-text{margin:0;font-size:14.5px;color:var(--muted);line-height:1.75}

/* ---------- Metrics & logo wall ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.metric{padding:28px 16px;text-align:center;border-left:1px solid var(--line)}
.metric:first-child{border-left:0}
.metric-num{font-size:34px;font-weight:600;line-height:1.2;color:var(--brand);font-variant-numeric:tabular-nums}
.metric-label{font-size:13px;color:var(--muted);margin-top:6px}
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:36px}
.logo-cell{opacity:.55;border:1px solid var(--line);border-radius:12px;padding:20px 8px;text-align:center;font-size:14px;color:var(--muted);background:#fff;transition:opacity .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.logo-cell:hover{opacity:1;transform:translateY(-2px);border-color:var(--line-strong);color:var(--ink)}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;gap:16px;padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;transition:color .18s var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-q::-webkit-details-marker{display:none}
.faq-index{font-size:13px;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums;flex:none}
.faq-icon{margin-left:auto;flex:none;font-size:14px;color:var(--brand);transition:transform .2s var(--ease)}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-a{margin:0;padding:0 0 22px 34px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-card{position:relative;background:var(--brand-50);border-radius:var(--radius-lg);padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;overflow:hidden}
.cta-card::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:64px;background:var(--accent);border-radius:0 4px 4px 0}
.cta-title{font-size:26px;font-weight:700;line-height:1.4;margin:0}
.cta-text{margin:12px 0 0;font-size:15px;color:var(--muted);line-height:1.8}
.subscribe{display:flex;gap:12px}
.input{width:100%;height:48px;padding:0 16px;border:1px solid #D8E0EE;border-radius:var(--radius-sm);background:#fff;color:var(--ink);font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.input::placeholder{color:#9AA6BC}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(44,86,196,.2)}
.form-note{margin:12px 0 0;font-size:12.5px;color:var(--muted)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:baseline;gap:6px;font-size:18px;font-weight:700;color:#fff}
.footer-brand span.sub{font-size:12px;font-weight:500;color:rgba(255,255,255,.6)}
.footer-desc{margin:14px 0 0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.65);max-width:320px}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.5);margin:0 0 16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.75);padding:6px 0;transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-col p{margin:0 0 10px;font-size:14px;color:rgba(255,255,255,.65);line-height:1.8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 0;font-size:13px;color:rgba(255,255,255,.55)}

/* ---------- Mobile tab ---------- */
.mobile-tab{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -6px 18px -14px rgba(16,26,46,.35);height:calc(60px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);align-items:center;justify-content:space-around}
.tab-item{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;font-size:10px;color:var(--muted);padding:8px 6px;transition:color .18s var(--ease)}
.tab-item i{font-size:18px;line-height:1}
.tab-item.is-active{color:var(--brand);font-weight:600}
.tab-item.is-active::after{content:"";position:absolute;top:2px;width:4px;height:4px;border-radius:50%;background:var(--brand)}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .main-nav{gap:18px}
  .nav-link{font-size:14.5px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-tab{display:flex}
  body{padding-bottom:76px}
  .section{padding:64px 0}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr}
  .hero-copy,.hero-media{grid-column:1 / -1}
  .hero-media{margin-top:32px}
  .hero-media img{height:300px}
  .stat-float{left:12px;bottom:12px}
  .claim-list{grid-template-columns:repeat(2,1fr);gap:18px 0}
  .claim-item:nth-child(3){border-left:0}
  .story-grid{grid-template-columns:1fr;gap:32px}
  .story-media img{height:320px}
  .feature-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr;gap:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(3){border-left:0}
  .metric{border-top:1px solid var(--line)}
  .metric:nth-child(1),.metric:nth-child(2){border-top:0}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .cta-card{grid-template-columns:1fr;padding:36px 28px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .section-title{font-size:24px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  body{font-size:16px}
  .hero-title{font-size:clamp(26px,7.6vw,32px)}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-trust{gap:6px 0}
  .hero-trust span{font-size:12.5px;padding:0 10px}
  .hero-media img{height:220px}
  .stat-float{padding:10px 14px;min-width:150px}
  .stat-float-num{font-size:18px}
  .news-item{flex-direction:column;gap:12px}
  .news-thumb{width:100%;height:auto;aspect-ratio:16/9}
  .steps{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-title{font-size:21px}
  .subscribe{flex-direction:column}
  .subscribe .btn{width:100%}
  .faq-a{padding-left:0}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --ink:#101A2E;
  --muted:#5B6880;
  --brand:#2C56C4;
  --brand-600:#22449E;
  --brand-50:#EEF3FE;
  --accent:#E0813A;
  --accent-50:#FCF1E7;
  --line:#E3E8F2;
  --line-strong:#CFDAF0;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FC;
  --bg-warm:#FBFAF7;
  --radius:16px;
  --radius-lg:24px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(16,26,46,.04),0 8px 24px -12px rgba(16,26,46,.10);
  --shadow-hover:0 14px 32px -14px rgba(16,26,46,.18);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.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}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(16,26,46,.45)}
.header-inner{height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:baseline;gap:7px;flex-shrink:0}
.brand .brand-main{font-size:18px;font-weight:700;letter-spacing:.4px;color:var(--ink)}
.brand .brand-sub{font-size:12px;font-weight:500;color:var(--muted);letter-spacing:.6px}
.brand:hover .brand-main{color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:72px;
  font-size:15px;color:var(--muted);white-space:nowrap;
}
.nav-link:hover{color:var(--brand)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:16px;margin-left:8px}
.header-actions .text-link{font-size:14px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.header-actions .text-link:hover{color:var(--brand)}
.header-actions .text-link i{font-size:12px;transition:transform var(--ease)}
.header-actions .text-link:hover i{transform:translateX(3px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--brand-600)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost:active{background:var(--brand-50)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#C9712D;transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0)}

.nav-toggle-input{position:absolute;opacity:0;pointer-events:none;width:0;height:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
  background:#fff;margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 24px 22px}
.mobile-drawer a{display:block;padding:12px 0;font-size:15px;color:var(--muted);border-bottom:1px solid var(--line)}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600}
.mobile-drawer .btn{margin-top:16px}
#navToggle:checked ~ .mobile-drawer{display:block}
#navToggle:checked ~ .header-inner .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
#navToggle:checked ~ .header-inner .nav-toggle span:nth-child(2){opacity:0}
#navToggle:checked ~ .header-inner .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 页头 ---------- */
.page-hero{position:relative;overflow:hidden;padding:56px 0 0;border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.png) center right / cover no-repeat;
  opacity:.13;pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,#fff 34%,rgba(255,255,255,.86) 58%,rgba(255,255,255,.55) 100%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);
  font-size:12px;font-weight:600;letter-spacing:.4px;
}
.badge-accent{background:var(--accent-50);color:var(--accent)}
.page-hero h1{
  font-size:clamp(28px,4.2vw,40px);
  font-weight:700;line-height:1.28;letter-spacing:-.2px;
  margin:18px 0 14px;max-width:820px;
}
.page-hero h1 .hl{color:var(--brand)}
.page-lead{font-size:16px;color:var(--muted);max-width:660px}
.hero-rule{margin-top:34px;height:1px;background:var(--line)}

/* ---------- 指标条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;box-shadow:var(--shadow);
  margin-top:-28px;position:relative;z-index:5;
  overflow:hidden;
}
.metric{padding:22px 24px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric .value{font-size:32px;font-weight:600;line-height:1.1;font-variant-numeric:tabular-nums;color:var(--ink)}
.metric .value small{font-size:14px;font-weight:600;color:var(--muted);margin-left:4px}
.metric .label{font-size:13px;color:var(--muted);margin-top:8px}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0}
.section-soft{background:var(--bg-soft)}
.section-warm{background:var(--bg-warm)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:30px;letter-spacing:-.3px}
.section-head p{font-size:15px;color:var(--muted);margin-top:10px;max-width:640px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;
}
.text-link i{font-size:12px;transition:transform var(--ease)}
.text-link:hover{text-decoration:underline}
.text-link:hover i{transform:translateX(4px)}

/* ---------- 筛选条 ---------- */
.filter-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  flex-wrap:wrap;margin-bottom:28px;
}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:13px;font-weight:600;cursor:pointer;
  display:inline-flex;align-items:center;
  transition:all var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff}
.chip.is-on:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.sort-note{font-size:13px;color:var(--muted)}
.sort-note strong{color:var(--ink);font-weight:600}

/* ---------- 指引列表 ---------- */
.guide-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.guide-item{
  display:flex;gap:16px;padding:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.guide-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.guide-item:hover .guide-title{color:var(--brand)}
.guide-thumb{
  flex:0 0 160px;width:160px;height:110px;border-radius:12px;overflow:hidden;
  background:var(--bg-soft);
}
.guide-thumb img{width:100%;height:100%;object-fit:cover}
.guide-body{min-width:0;display:flex;flex-direction:column}
.guide-meta-top{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:999px;font-size:11px;font-weight:600;
  background:var(--brand-50);color:var(--brand);
}
.tag-accent{background:var(--accent-50);color:var(--accent)}
.guide-title{
  font-size:16px;font-weight:600;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ease);
}
.guide-desc{
  font-size:13px;line-height:1.75;color:var(--muted);margin-top:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.guide-foot{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  margin-top:auto;padding-top:10px;font-size:12px;color:var(--muted);
}
.guide-foot .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong)}
.guide-foot i{font-size:11px;transition:transform var(--ease)}
.guide-item:hover .guide-foot i{transform:translateX(3px)}

.list-foot{display:flex;justify-content:center;margin-top:36px}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.step:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-no{
  font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
  letter-spacing:1px;
}
.step h3{font-size:17px;margin:12px 0 10px;font-weight:600;line-height:1.45}
.step p{font-size:13px;color:var(--muted);line-height:1.8}
.step-line{margin-top:16px;height:3px;width:36px;border-radius:2px;background:var(--accent)}

/* ---------- 对比表 ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  box-shadow:var(--shadow);overflow:hidden;
}
.table-scroll{overflow-x:auto}
table.spec{width:100%;border-collapse:collapse;min-width:680px;font-size:14px}
table.spec thead th{
  background:var(--bg-soft);text-align:left;font-weight:600;font-size:13px;
  color:var(--muted);letter-spacing:.4px;padding:14px 20px;
  border-bottom:1px solid var(--line);white-space:nowrap;
}
table.spec tbody td{padding:16px 20px;border-bottom:1px solid var(--line);color:var(--ink);vertical-align:top}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:hover td{background:#FAFBFE}
table.spec td.name{font-weight:600;white-space:nowrap}
table.spec td.time{font-variant-numeric:tabular-nums;font-weight:600;color:var(--brand);white-space:nowrap}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  padding:24px;box-shadow:var(--shadow);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.scene:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.scene-icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:17px;
}
.scene h3{font-size:16px;font-weight:600;margin:16px 0 8px}
.scene p{font-size:13px;color:var(--muted);line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item .idx{font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;flex:0 0 28px}
.faq-item .plus{
  margin-left:auto;flex:0 0 16px;width:16px;height:16px;position:relative;
  transition:transform var(--ease);
}
.faq-item .plus::before,.faq-item .plus::after{
  content:"";position:absolute;background:var(--muted);border-radius:2px;
}
.faq-item .plus::before{left:0;top:7px;width:16px;height:2px}
.faq-item .plus::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-item[open] summary{color:var(--brand)}
.faq-answer{padding:0 0 24px 44px;font-size:15px;line-height:1.85;color:var(--muted);max-width:820px}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-50);border-radius:var(--radius-lg);
  padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:32px;bottom:32px;width:4px;
  background:var(--accent);border-radius:2px;
}
.cta-band h2{font-size:24px;letter-spacing:-.2px;padding-left:16px}
.cta-band p{font-size:14px;color:var(--muted);margin-top:10px;padding-left:16px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;margin-top:96px;padding-top:64px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand{display:flex;align-items:baseline;gap:7px;margin-bottom:16px}
.footer-brand span:first-child{font-size:18px;font-weight:700}
.footer-brand .sub{font-size:12px;color:rgba(255,255,255,.62)}
.footer-desc{font-size:13px;line-height:1.9;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:1.2px;color:rgba(255,255,255,.5);
  margin-bottom:18px;text-transform:uppercase;
}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.78);
  padding:6px 0;transition:color var(--ease),transform var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-col a i{font-size:11px;margin-left:6px}
.footer-col p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.62);margin-bottom:10px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:rgba(255,255,255,.55);flex-wrap:wrap;
}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 18px -14px rgba(16,26,46,.5);
  padding-bottom:env(safe-area-inset-bottom);
  height:calc(60px + env(safe-area-inset-bottom));
}
.mobile-tab ul{display:grid;grid-template-columns:repeat(5,1fr);height:60px}
.mobile-tab a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:10px;color:var(--muted);position:relative;
}
.mobile-tab a i{font-size:19px;line-height:1;color:var(--muted);transition:color var(--ease)}
.mobile-tab a.on{color:var(--brand);font-weight:600}
.mobile-tab a.on i{color:var(--brand)}
.mobile-tab a.on::after{
  content:"";position:absolute;top:6px;width:3px;height:3px;border-radius:50%;background:var(--brand);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav{display:none}
  .header-actions{display:none}
  .nav-toggle{display:flex}
  .mobile-tab{display:block}
  body{padding-bottom:76px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .guide-list{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .page-hero{padding-top:40px}
  .page-hero h1{font-size:26px}
  .metrics{margin-top:0;border-radius:14px}
  .metric{padding:18px 18px}
  .metric .value{font-size:26px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .section-head h2{font-size:24px}
  .guide-item{flex-direction:column;gap:14px}
  .guide-thumb{width:100%;height:auto;flex:none;aspect-ratio:16/9}
  .steps{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .faq-answer{padding-left:0}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-footer{margin-top:64px;padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:519px){
  .chips{gap:8px}
  .chip{height:34px;padding:0 14px;font-size:12px}
  .brand .brand-main{font-size:16px}
  .brand .brand-sub{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* roulang page: article */
:root{
  --ink:#101A2E;
  --muted:#5B6880;
  --brand:#2C56C4;
  --brand-600:#22449E;
  --brand-50:#EEF3FE;
  --accent:#E0813A;
  --accent-50:#FCF1E7;
  --line:#E3E8F2;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FC;
  --bg-warm:#FBFAF7;
  --radius:16px;
  --radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(16,26,46,.04), 0 8px 24px -12px rgba(16,26,46,.10);
  --shadow-hover:0 14px 32px -14px rgba(16,26,46,.18);
  --ease:cubic-bezier(.22,.68,.28,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{margin:0;padding:0;-webkit-text-size-adjust:100%;}
.site-body{
  margin:0;padding:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;line-height:1.85;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .19s var(--ease);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- 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 var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(16,26,46,.5);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
.brand{display:inline-flex;align-items:baseline;gap:9px;text-decoration:none;color:var(--ink);}
.brand-main{font-size:19px;font-weight:700;letter-spacing:.01em;line-height:1;}
.brand-sub{font-size:12px;color:var(--muted);font-weight:400;border-left:1px solid var(--line);padding-left:9px;line-height:1;}
.main-nav{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-block;padding:24px 12px;
  font-size:15px;color:var(--muted);text-decoration:none;line-height:1.2;
  transition:color .18s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:16px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;text-decoration:none;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(44,86,196,.9);}
.btn-primary:active{transform:none;box-shadow:none;}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-secondary:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-secondary:active{transform:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--ink);text-decoration:none;
  transition:color .18s var(--ease);
}
.btn-text i{font-size:12px;transition:transform .18s var(--ease);}
.btn-text:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.btn-text:hover i{transform:translateX(4px);}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink);font-size:16px;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{position:fixed;inset:0;z-index:90;display:none;}
.mobile-drawer.is-open{display:block;}
.drawer-mask{position:absolute;inset:0;background:rgba(16,26,46,.45);}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:84%;max-width:340px;
  background:#fff;padding:20px;overflow-y:auto;
  box-shadow:-16px 0 40px -24px rgba(16,26,46,.5);
  display:flex;flex-direction:column;gap:20px;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--muted);cursor:pointer;font-size:15px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  display:block;padding:13px 12px;border-radius:10px;
  font-size:15px;color:var(--ink);text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.drawer-nav a:hover{background:var(--brand-50);color:var(--brand);}
.drawer-nav a.is-active{background:var(--brand-50);color:var(--brand);font-weight:600;}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:none;background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 20px -16px rgba(16,26,46,.5);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-item{
  position:relative;flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:10px;color:var(--muted);text-decoration:none;line-height:1.2;
  transition:color .18s var(--ease);
}
.tab-item i{font-size:19px;}
.tab-item:hover{color:var(--brand);}
.tab-item.is-active{color:var(--brand);font-weight:600;}
.tab-item.is-active::before{
  content:"";position:absolute;top:7px;width:6px;height:6px;border-radius:50%;background:var(--brand);
}

/* ---------- 文章页主体 ---------- */
.article-page{padding-top:40px;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);line-height:1.6;
}
.breadcrumb a{color:var(--muted);text-decoration:none;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C3CCDE;}
.breadcrumb .current{color:var(--ink);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);font-size:12px;font-weight:600;line-height:1;letter-spacing:.02em;
}
.badge-accent{background:var(--accent-50);color:var(--accent);}
.article-head{margin-top:20px;padding-bottom:26px;border-bottom:1px solid var(--line);}
.article-title{
  margin:14px 0 0;
  font-size:clamp(26px,4.2vw,36px);line-height:1.32;font-weight:700;letter-spacing:-.01em;
  color:var(--ink);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;
  margin-top:16px;font-size:13.5px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.meta-dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:#C3CCDE;}
.share-group{display:flex;align-items:center;gap:8px;margin-left:auto;}
.share-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:14px;cursor:pointer;text-decoration:none;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.share-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50);}
.share-btn.is-done{border-color:var(--accent);color:var(--accent);background:var(--accent-50);}

.article-layout{
  display:grid;grid-template-columns:minmax(0,1.95fr) minmax(0,1fr);
  gap:48px;padding:34px 0 56px;align-items:start;
}
.article-main{min-width:0;}
.article-lead{
  margin:0 0 30px;padding:4px 0 4px 18px;
  border-left:3px solid var(--brand);
  font-size:15px;line-height:1.85;color:var(--muted);
}
.article-body{
  max-width:720px;
  font-size:17px;line-height:1.9;color:#1B2540;
  word-break:break-word;
}
.article-body p{margin:0 0 20px;}
.article-body h1,
.article-body h2{
  position:relative;
  font-size:24px;font-weight:700;line-height:1.45;color:var(--ink);
  margin:40px 0 16px;padding-left:16px;
}
.article-body h1::before,
.article-body h2::before{
  content:"";position:absolute;left:0;top:9px;width:4px;height:18px;border-radius:2px;background:var(--brand);
}
.article-body h3{
  font-size:19px;font-weight:600;line-height:1.5;color:var(--ink);
  margin:28px 0 12px;
}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;}
.article-body ul,
.article-body ol{margin:0 0 20px;padding-left:22px;}
.article-body ul{list-style:none;padding-left:18px;}
.article-body ul li{position:relative;padding-left:16px;margin-bottom:8px;line-height:1.8;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.article-body ol li{margin-bottom:8px;line-height:1.8;list-style:decimal;}
.article-body blockquote{
  margin:24px 0;padding:20px 24px;
  background:var(--bg-soft);border-left:3px solid var(--line);
  border-radius:0 12px 12px 0;color:#33405C;font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:12px;margin:24px auto;height:auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15.5px;line-height:1.7;
}
.article-body th,
.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;}
.article-body th{background:var(--bg-soft);font-weight:600;color:var(--ink);}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-600);}
.article-body strong{font-weight:600;color:var(--ink);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

.empty-state{
  border:1px dashed var(--line);border-radius:16px;
  padding:48px 24px;text-align:center;background:var(--bg-soft);
}
.empty-state i{font-size:26px;color:#B9C4D8;display:block;margin-bottom:14px;}
.empty-state p{margin:0 0 18px;font-size:15px;color:var(--muted);}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;min-width:0;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:20px;box-shadow:var(--shadow-sm);
}
.side-title{
  margin:0 0 14px;font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.04em;
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;}
.toc-link{
  display:block;padding:9px 12px;border-radius:0 8px 8px 0;
  border-left:2px solid transparent;
  font-size:14px;color:var(--muted);text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.toc-link:hover{background:var(--bg-soft);color:var(--brand);}
.toc-link.is-active{background:var(--brand-50);color:var(--brand);border-left-color:var(--brand);font-weight:600;}
.mini-item{padding:12px 0;border-bottom:1px solid var(--line);}
.mini-item:first-of-type{padding-top:0;}
.mini-item:last-child{border-bottom:0;padding-bottom:0;}
.mini-item a{display:block;font-size:14.5px;font-weight:600;color:var(--ink);text-decoration:none;line-height:1.5;}
.mini-item a:hover{color:var(--brand);}
.mini-item span{display:block;margin-top:4px;font-size:12.5px;color:var(--muted);font-weight:400;line-height:1.6;}
.side-btn{width:100%;}
.side-card.is-cta{background:var(--brand-50);border-color:#DCE6FB;box-shadow:none;}
.side-card.is-cta p{margin:0 0 12px;font-size:14.5px;color:#2B3A5C;line-height:1.7;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);text-decoration:none;
}
.link-arrow i{font-size:11px;transition:transform .18s var(--ease);}
.link-arrow:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px;}
.link-arrow:hover i{transform:translateX(4px);}

/* ---------- 板块通用 ---------- */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  margin-bottom:28px;flex-wrap:wrap;
}
.section-title{margin:0;font-size:clamp(22px,3vw,28px);line-height:1.35;font-weight:700;color:var(--ink);}
.section-sub{margin:8px 0 0;font-size:14.5px;color:var(--muted);line-height:1.7;}
.related-section{padding:56px 0;border-top:1px solid var(--line);background:#fff;}
.post-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(--line);border-radius:16px;overflow:hidden;
  box-shadow:var(--shadow-sm);text-decoration:none;color:inherit;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CFDAF0;}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s var(--ease);}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;align-items:flex-start;}
.post-title{
  margin:0;font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s var(--ease);
}
.post-card:hover .post-title{color:var(--brand);}
.post-desc{
  margin:0;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{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* ---------- FAQ ---------- */
.faq-section{padding:56px 0;background:var(--bg-soft);}
.faq-wrap{max-width:860px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  display:flex;align-items:center;gap:14px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;line-height:1.6;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-num{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.04em;}
.faq-icon{
  margin-left:auto;font-size:13px;color:var(--brand);flex:0 0 auto;
  transition:transform .2s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-item[open] .faq-q{color:var(--brand);}
.faq-a{padding:0 0 20px 34px;font-size:15.5px;line-height:1.8;color:var(--muted);}
.faq-a p{margin:0 0 12px;}
.faq-a p:last-child{margin-bottom:0;}

/* ---------- CTA 横条 ---------- */
.cta-wrap{padding:56px 0;}
.cta-band{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--brand-50);border-radius:var(--radius-lg);
  padding:32px 36px 32px 44px;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:46px;background:var(--accent);border-radius:0 4px 4px 0;
}
.cta-band h3{margin:0 0 8px;font-size:20px;font-weight:700;color:var(--ink);line-height:1.4;}
.cta-band p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.25fr;gap:40px;}
.footer-brand{display:flex;align-items:baseline;gap:8px;font-size:18px;font-weight:700;color:#fff;line-height:1.2;}
.footer-brand .sub{font-size:12px;color:rgba(255,255,255,.58);font-weight:400;border-left:1px solid rgba(255,255,255,.18);padding-left:8px;}
.footer-desc{margin:16px 0 0;font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:330px;}
.footer-col h4{margin:0 0 16px;font-size:13px;font-weight:600;letter-spacing:.14em;color:rgba(255,255,255,.5);}
.footer-col a{
  display:block;padding:6px 0;font-size:14.5px;color:rgba(255,255,255,.78);text-decoration:none;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-col a:hover{color:#fff;}
.footer-col a i{margin-left:6px;font-size:11px;}
.footer-col p{margin:0 0 10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:22px 0 26px;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav,.header-actions{display:none;}
  .nav-toggle{display:inline-flex;}
  .mobile-tabbar{display:flex;}
  .site-body{padding-bottom:76px;}
  .header-inner{height:64px;}
  .article-layout{grid-template-columns:1fr;gap:32px;padding:28px 0 44px;}
  .article-side{position:static;}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .site-body{font-size:16px;line-height:1.8;}
  .article-page{padding-top:24px;}
  .article-title{font-size:26px;}
  .article-meta{gap:8px 10px;font-size:13px;}
  .share-group{margin-left:0;width:100%;margin-top:4px;}
  .breadcrumb .current{max-width:100%;white-space:normal;}
  .article-body{font-size:16.5px;line-height:1.85;}
  .article-body h2{font-size:21px;margin:32px 0 14px;}
  .article-body h3{font-size:18px;}
  .post-grid{grid-template-columns:1fr;}
  .post-thumb{aspect-ratio:16/9;}
  .related-section,.faq-section,.cta-wrap{padding:44px 0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 24px 26px 28px;}
  .cta-band::before{height:36px;}
  .cta-band .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{margin-top:36px;font-size:12.5px;}
  .faq-q{font-size:15px;padding:18px 0;}
  .faq-a{padding-left:0;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .post-card:hover,.article-card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
    --ink:#101A2E;
    --muted:#5B6880;
    --brand:#2C56C4;
    --brand-600:#22449E;
    --brand-50:#EEF3FE;
    --accent:#E0813A;
    --accent-50:#FCF1E7;
    --line:#E3E8F2;
    --bg:#FFFFFF;
    --bg-soft:#F6F8FC;
    --bg-warm:#FBFAF7;
    --radius:16px;
    --radius-lg:24px;
    --shadow-sm:0 1px 2px rgba(16,26,46,.04),0 8px 24px -12px rgba(16,26,46,.10);
    --shadow-md:0 14px 32px -14px rgba(16,26,46,.18);
    --ease:cubic-bezier(.4,0,.2,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
    font-size:17px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
  }
  h1,h2,h3,h4,p,figure{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input{font-family:inherit;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  /* ============ 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 var(--ease);
  }
  .site-header.is-scrolled{box-shadow:0 8px 22px -18px rgba(16,26,46,.45);}
  .header-inner{display:flex;align-items:center;gap:28px;min-height:72px;}
  .logo{display:flex;flex-direction:column;line-height:1.15;flex-shrink:0;padding:2px 0;}
  .logo-main{font-size:19px;font-weight:700;letter-spacing:.6px;color:var(--ink);}
  .logo-sub{font-size:11px;letter-spacing:2.4px;color:var(--muted);margin-top:3px;}
  .logo:hover .logo-main{color:var(--brand);}
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:72px;
    padding:0 13px;font-size:15px;font-weight:500;color:var(--muted);
    transition:color .18s var(--ease);white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:13px;right:13px;bottom:14px;height:2px;
    background:var(--brand);border-radius:2px;
    transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
  }
  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--ink);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}
  .header-actions{display:flex;align-items:center;gap:16px;flex-shrink:0;}
  .nav-toggle{
    display:none;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;margin-left:auto;border-radius:10px;
    border:1px solid var(--line);background:#fff;align-items:center;
    transition:border-color .18s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--brand);}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.is-open span:nth-child(2){opacity:0;}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:6px 0 18px;}
  .mobile-drawer.is-open{display:block;}
  .mobile-drawer a{
    display:block;padding:13px 24px;font-size:16px;color:var(--ink);
    border-bottom:1px solid var(--line);transition:background-color .18s var(--ease),color .18s var(--ease);
  }
  .mobile-drawer a:hover{background:var(--bg-soft);color:var(--brand);}
  .mobile-drawer a.is-active{color:var(--brand);font-weight:600;background:var(--brand-50);}
  .mobile-drawer .drawer-cta{padding:16px 24px 0;}

  /* ============ 按钮与通用件 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 22px;border-radius:10px;
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:background-color .18s var(--ease),color .18s var(--ease),
               border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  }
  .btn-sm{height:40px;padding:0 16px;font-size:14px;}
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);}
  .btn-primary:active{transform:none;}
  .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
  .btn-ghost:active{background:var(--brand-50);}
  .link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);transition:color .18s var(--ease);}
  .link-arrow i{font-size:12px;transition:transform .2s var(--ease);}
  .link-arrow:hover{text-decoration:underline;text-underline-offset:4px;}
  .link-arrow:hover i{transform:translateX(4px);}
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;
    border-radius:999px;background:var(--brand-50);color:var(--brand);
    font-size:12px;font-weight:600;letter-spacing:.4px;white-space:nowrap;
  }
  .badge-accent{background:var(--accent-50);color:var(--accent);}

  /* ============ 页头 ============ */
  .page-head{
    position:relative;overflow:hidden;
    background:var(--bg-soft);
    padding:72px 0 44px;
    border-bottom:1px solid var(--line);
  }
  .page-head::before{
    content:"";position:absolute;inset:0;
    background:url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
    opacity:.12;pointer-events:none;
  }
  .page-head-inner{position:relative;max-width:860px;}
  .page-head h1{
    margin-top:18px;
    font-size:clamp(28px,4.6vw,40px);
    font-weight:700;line-height:1.25;letter-spacing:-.6px;
  }
  .page-head-desc{margin-top:14px;font-size:16px;line-height:1.8;color:var(--muted);max-width:660px;}
  .page-head-line{margin-top:30px;height:1px;background:var(--line);}

  /* ============ 板块 ============ */
  .section{padding:96px 0;}
  .section-soft{background:var(--bg-soft);}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px;}
  .section-head h2{font-size:30px;font-weight:700;line-height:1.3;letter-spacing:-.3px;}
  .section-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:640px;line-height:1.8;}

  /* ============ 精选大卡 ============ */
  .feature-card{
    display:grid;grid-template-columns:5fr 7fr;
    background:#fff;border:1px solid var(--line);border-radius:24px;
    overflow:hidden;box-shadow:var(--shadow-sm);
    transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .feature-card:hover{box-shadow:var(--shadow-md);border-color:#CFDAF0;}
  .feature-media{position:relative;min-height:340px;background:var(--bg-soft);}
  .feature-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
  .feature-body{padding:44px;display:flex;flex-direction:column;justify-content:center;}
  .feature-body h2{margin-top:16px;font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.3px;}
  .feature-body p{margin-top:16px;font-size:16px;line-height:1.85;color:var(--muted);}
  .feature-body .link-arrow{margin-top:24px;align-self:flex-start;}

  /* ============ 卡片网格 ============ */
  .card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .card{
    display:flex;flex-direction:column;background:#fff;
    border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;box-shadow:var(--shadow-sm);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#CFDAF0;}
  .card-media{aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft);}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
  .card:hover .card-media img{transform:scale(1.03);}
  .card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .card-body h3{font-size:19px;font-weight:600;line-height:1.45;transition:color .18s var(--ease);}
  .card:hover .card-body h3{color:var(--brand);}
  .card-body p{
    font-size:14.5px;line-height:1.75;color:var(--muted);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .grid-more{display:flex;justify-content:center;margin-top:44px;}

  /* ============ 流程 ============ */
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
  .step{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:28px 24px;box-shadow:var(--shadow-sm);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .step:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#CFDAF0;}
  .step-num{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1.2px;font-variant-numeric:tabular-nums;}
  .step h3{margin-top:14px;font-size:19px;font-weight:600;line-height:1.45;}
  .step p{margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--muted);}

  /* ============ FAQ ============ */
  .faq{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item summary{
    display:flex;align-items:center;gap:16px;
    padding:22px 0;font-size:16px;font-weight:600;line-height:1.6;
    cursor:pointer;list-style:none;transition:color .18s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand);}
  .faq-index{font-size:13px;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums;min-width:26px;}
  .faq-icon{margin-left:auto;font-size:13px;color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease);}
  .faq-item[open] summary .faq-icon{transform:rotate(45deg);color:var(--brand);}
  .faq-item[open] summary{color:var(--brand);}
  .faq-answer{padding:0 46px 24px 42px;font-size:15.5px;line-height:1.9;color:var(--muted);}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
    background:var(--brand-50);border-radius:var(--radius-lg);
    padding:44px 48px;
  }
  .cta-band::before{
    content:"";position:absolute;left:0;top:44px;bottom:44px;width:4px;
    background:var(--accent);border-radius:0 4px 4px 0;
  }
  .cta-band h2{font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.3px;}
  .cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted);max-width:580px;}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink);color:#fff;padding:72px 0 0;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
  .footer-brand{display:flex;flex-direction:column;line-height:1.2;font-size:20px;font-weight:700;letter-spacing:.6px;}
  .footer-brand .sub{font-size:11px;letter-spacing:2.4px;color:rgba(255,255,255,.55);font-weight:500;margin-top:5px;}
  .footer-desc{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:330px;}
  .footer-col h4{font-size:13px;letter-spacing:1.8px;color:rgba(255,255,255,.5);font-weight:600;margin-bottom:18px;}
  .footer-col a{display:block;font-size:14.5px;color:rgba(255,255,255,.78);padding:6px 0;transition:color .18s var(--ease);}
  .footer-col a:hover{color:#fff;}
  .footer-col a i{margin-left:6px;font-size:12px;transition:transform .2s var(--ease);}
  .footer-col a:hover i{transform:translateX(4px);}
  .footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);margin-bottom:10px;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    padding:22px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.5);
  }

  /* ============ 移动底部 Tab ============ */
  .mobile-tab{
    position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    box-shadow:0 -8px 20px -16px rgba(16,26,46,.5);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobile-tab ul{display:grid;grid-template-columns:repeat(5,1fr);height:60px;}
  .mobile-tab a{
    position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:4px;font-size:10px;color:var(--muted);transition:color .18s var(--ease);
  }
  .mobile-tab i{font-size:18px;line-height:1;}
  .mobile-tab a:hover{color:var(--brand);}
  .mobile-tab a.is-active{color:var(--brand);font-weight:600;}
  .mobile-tab a.is-active::after{
    content:"";position:absolute;top:7px;width:3px;height:3px;border-radius:50%;background:var(--brand);
  }

  /* ============ 响应式 ============ */
  @media (min-width:1024px){
    .nav-toggle{display:none;}
    .mobile-drawer{display:none !important;}
  }
  @media (max-width:1023px){
    .main-nav{display:none;}
    .header-actions{display:none;}
    .nav-toggle{display:flex;}
    .mobile-tab{display:block;}
    body{padding-bottom:76px;}
    .card-grid{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:900px){
    .feature-card{grid-template-columns:1fr;}
    .feature-media{min-height:auto;aspect-ratio:16/9;}
    .feature-body{padding:28px;}
    .feature-body h2{font-size:22px;}
    .cta-band{grid-template-columns:1fr;padding:32px 28px;}
    .cta-band::before{top:32px;bottom:32px;}
    .cta-band h2{font-size:22px;}
  }
  @media (max-width:768px){
    .container{padding:0 20px;}
    .section{padding:56px 0;}
    .page-head{padding:52px 0 34px;}
    .section-head h2{font-size:24px;}
    .section-head{margin-bottom:28px;}
    .faq-answer{padding-left:0;padding-right:0;}
    .footer-bottom{flex-direction:column;gap:8px;}
  }
  @media (max-width:640px){
    .card-grid{grid-template-columns:1fr;}
    .steps{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:40px;}
    .site-footer{padding-top:56px;}
    .btn{width:100%;}
    .cta-actions .btn{width:100%;}
    .feature-body .link-arrow{align-self:flex-start;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: category3 */
:root{
  --ink:#101A2E;
  --muted:#5B6880;
  --brand:#2C56C4;
  --brand-600:#22449E;
  --brand-50:#EEF3FE;
  --accent:#E0813A;
  --accent-50:#FCF1E7;
  --line:#E3E8F2;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FC;
  --bg-warm:#FBFAF7;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,26,46,.04),0 8px 24px -12px rgba(16,26,46,.10);
  --shadow-hover:0 14px 32px -14px rgba(16,26,46,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.tnum{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(16,26,46,.35);}
.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.15;flex-shrink:0;}
.logo .brand-main{font-size:18px;font-weight:700;letter-spacing:.5px;color:var(--ink);}
.logo .brand-sub{font-size:11px;letter-spacing:2.4px;color:var(--muted);margin-top:2px;}
.main-nav{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:72px;
  padding:0 14px;font-size:15px;color:var(--muted);
  transition:color .2s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:16px;flex-shrink:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -14px rgba(44,86,196,.9);}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);}
.btn-primary:active{background:var(--brand-600);transform:none;}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-ghost:active{background:var(--brand-50);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand);}
.link-arrow i{transition:transform .2s var(--ease);font-size:13px;}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px;}
.link-arrow:hover i{transform:translateX(4px);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  color:var(--ink);align-items:center;justify-content:center;font-size:16px;background:#fff;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:#fff;
  padding:12px 0 20px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line);
}
.mobile-panel a:last-child{border-bottom:0;}
.mobile-panel a.is-active{color:var(--brand);font-weight:600;}
.mobile-panel a i{color:var(--muted);font-size:12px;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;background:var(--bg-soft);
  border-bottom:1px solid var(--line);
  padding:64px 0 52px;
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.12;pointer-events:none;
}
.page-hero-inner{position:relative;max-width:820px;}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);
  font-size:12px;font-weight:600;letter-spacing:.6px;
}
.badge-accent{background:var(--accent-50);color:var(--accent);}
.page-hero h1{
  margin-top:18px;
  font-size:clamp(28px,4.2vw,42px);
  line-height:1.25;font-weight:700;letter-spacing:-.3px;
}
.page-hero .lead{
  margin-top:16px;font-size:18px;line-height:1.8;color:var(--muted);max-width:640px;
}
.hero-divider{margin-top:32px;height:1px;background:var(--line);}
.crumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:16px;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#B7C2D6;}
.crumb .now{color:var(--ink);}

/* ---------- spec strip ---------- */
.spec-strip{padding:40px 0 0;}
.spec-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:#fff;box-shadow:var(--shadow-card);overflow:hidden;
}
.spec-item{padding:26px 24px;border-right:1px solid var(--line);}
.spec-item:last-child{border-right:0;}
.spec-num{font-size:30px;font-weight:600;line-height:1.2;letter-spacing:-.5px;color:var(--ink);}
.spec-num small{font-size:14px;font-weight:600;color:var(--muted);margin-left:4px;}
.spec-label{margin-top:6px;font-size:13px;color:var(--muted);}

/* ---------- section basics ---------- */
.section{padding:72px 0;}
.section-soft{background:var(--bg-soft);}
.section-head{max-width:720px;margin-bottom:8px;}
.section-head h2{font-size:30px;font-weight:700;line-height:1.35;letter-spacing:-.3px;}
.section-head p{margin-top:12px;color:var(--muted);font-size:16px;}
.section-kicker{
  font-size:13px;font-weight:600;letter-spacing:1.6px;color:var(--brand);
  text-transform:uppercase;margin-bottom:10px;
}

/* ---------- zig zag ---------- */
.zig-list{display:flex;flex-direction:column;}
.zig{
  display:grid;grid-template-columns:repeat(12,1fr);gap:48px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.zig:first-child{padding-top:8px;}
.zig:last-child{border-bottom:0;padding-bottom:8px;}
.zig-media{grid-column:span 6;position:relative;}
.zig-media .frame{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  aspect-ratio:16/10;background:var(--bg-soft);
}
.zig-media .frame img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.zig:hover .zig-media .frame img{transform:scale(1.02);}
.zig-body{grid-column:span 6;}
.zig.is-reverse .zig-media{order:2;}
.zig.is-reverse .zig-body{order:1;}
.zig-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--accent-50);color:var(--accent);
  font-size:15px;font-weight:600;letter-spacing:.5px;
}
.zig-body h3{margin-top:18px;font-size:22px;font-weight:700;line-height:1.45;letter-spacing:-.2px;}
.zig-body p{margin-top:14px;font-size:16px;line-height:1.85;color:var(--muted);}
.zig-body p strong{color:var(--ink);font-weight:600;}
.zig-points{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.zig-points li{
  position:relative;padding-left:20px;font-size:15px;line-height:1.75;color:var(--ink);
}
.zig-points li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:999px;background:var(--brand);
}
.zig-body .link-arrow{margin-top:22px;}

/* ---------- device matrix ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;}
.matrix-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.matrix-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CFDAF0;}
.matrix-card .icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;
}
.matrix-card h3{margin-top:18px;font-size:19px;font-weight:600;}
.matrix-card .meta{margin-top:6px;font-size:13px;color:var(--muted);}
.matrix-card ul{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.matrix-card ul li{
  display:flex;gap:10px;font-size:15px;line-height:1.7;color:var(--muted);
  padding-top:10px;border-top:1px solid var(--line);
}
.matrix-card ul li:first-child{padding-top:0;border-top:0;}
.matrix-card ul li span.k{color:var(--ink);font-weight:600;flex-shrink:0;min-width:64px;}

/* ---------- checklist ---------- */
.check-wrap{
  margin-top:40px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:36px;box-shadow:var(--shadow-card);
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px 40px;
}
.check-item{display:flex;gap:14px;}
.check-item .dot{
  flex-shrink:0;width:28px;height:28px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;
  margin-top:2px;
}
.check-item h4{font-size:16px;font-weight:600;}
.check-item p{margin-top:4px;font-size:15px;line-height:1.75;color:var(--muted);}

/* ---------- cta bar ---------- */
.cta-bar{
  margin:0 0 72px;
  background:var(--brand-50);border-radius:var(--radius-lg);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  border:1px solid #DCE6FA;
}
.cta-bar .accent-bar{width:4px;height:44px;border-radius:999px;background:var(--accent);flex-shrink:0;}
.cta-bar .txt{display:flex;align-items:center;gap:20px;flex:1;}
.cta-bar h2{font-size:22px;font-weight:700;line-height:1.45;}
.cta-bar p{margin-top:6px;font-size:15px;color:var(--muted);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;flex-direction:column;line-height:1.2;}
.footer-brand span:first-child{font-size:18px;font-weight:700;letter-spacing:.5px;}
.footer-brand .sub{font-size:11px;letter-spacing:2.4px;color:rgba(255,255,255,.55);margin-top:4px;}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:300px;}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:1.4px;text-transform:uppercase;
  color:rgba(255,255,255,.5);margin-bottom:18px;
}
.footer-col a{
  display:block;font-size:15px;color:rgba(255,255,255,.78);
  padding:6px 0;transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);margin-bottom:10px;}
.footer-col a i{margin-left:8px;font-size:12px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 18px -16px rgba(16,26,46,.5);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:60px;font-size:10px;color:var(--muted);position:relative;
  transition:color .2s var(--ease);
}
.mobile-tab a i{font-size:18px;line-height:1;}
.mobile-tab a.is-active{color:var(--brand);font-weight:600;}
.mobile-tab a.is-active::after{
  content:"";position:absolute;top:8px;width:3px;height:3px;border-radius:999px;background:var(--brand);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .main-nav,.header-actions .btn-ghost{display:none;}
  .nav-toggle{display:inline-flex;}
  .mobile-tab{display:flex;}
  body{padding-bottom:76px;}
  .section{padding:56px 0;}
  .zig{gap:28px;padding:44px 0;}
  .zig-media,.zig-body{grid-column:span 12;}
  .zig.is-reverse .zig-media{order:0;}
  .zig.is-reverse .zig-body{order:0;}
  .spec-grid{grid-template-columns:repeat(2,1fr);}
  .spec-item:nth-child(2){border-right:0;}
  .spec-item:nth-child(1),.spec-item:nth-child(2){border-bottom:1px solid var(--line);}
  .matrix-grid{grid-template-columns:1fr 1fr;}
  .check-wrap{grid-template-columns:1fr;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:28px;margin-bottom:56px;}
  .cta-bar .btn{width:100%;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .page-hero{padding:44px 0 40px;}
  .page-hero .lead{font-size:16px;}
  .section-head h2{font-size:24px;}
  .zig-body h3{font-size:20px;}
  .spec-num{font-size:26px;}
  .matrix-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category4 */
:root{
  --ink:#101A2E;
  --muted:#5B6880;
  --brand:#2C56C4;
  --brand-600:#22449E;
  --brand-50:#EEF3FE;
  --accent:#E0813A;
  --accent-50:#FCF1E7;
  --line:#E3E8F2;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FC;
  --bg-warm:#FBFAF7;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,26,46,.04),0 8px 24px -12px rgba(16,26,46,.10);
  --shadow-hover:0 14px 32px -14px rgba(16,26,46,.18);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.page-body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
::selection{background:var(--brand-50);color:var(--brand-600)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(16,26,46,.45)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:baseline;gap:6px;flex-shrink:0}
.brand-main{font-size:19px;font-weight:700;letter-spacing:.3px;color:var(--ink)}
.brand-sub{font-size:12.5px;font-weight:500;color:var(--muted);letter-spacing:.4px}
.brand:hover .brand-main{color:var(--brand)}
.brand:focus-visible{outline:2px solid var(--brand);outline-offset:4px;border-radius:6px}
.main-nav{display:flex;align-items:center;gap:26px;height:72px;margin-left:20px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:100%;
  font-size:15px;color:var(--muted);white-space:nowrap;
  transition:color .18s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:4px;border-radius:4px}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;background:var(--brand);border-radius:2px 2px 0 0;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:18px}
.link-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--brand);
  transition:color .18s ease;
}
.link-text i{font-size:11px;transition:transform .2s ease}
.link-text:hover{text-decoration:underline;text-underline-offset:4px}
.link-text:hover i{transform:translateX(4px)}
.link-text:focus-visible{outline:2px solid var(--brand);outline-offset:4px;border-radius:4px}
.link-text:active{color:var(--brand-600)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(44,86,196,.9)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 移动端抽屉按钮 ---------- */
.nav-toggle{
  display:none;width:42px;height:42px;margin-left:auto;
  align-items:center;justify-content:center;border:1px solid var(--line);
  border-radius:var(--radius-btn);color:var(--ink);
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:12px 0 18px}
.mobile-drawer.is-open{display:block}
.mobile-drawer .container{display:flex;flex-direction:column;gap:2px}
.mobile-drawer a{
  padding:12px 4px;font-size:15px;color:var(--muted);border-bottom:1px solid var(--line);
  transition:color .18s ease;
}
.mobile-drawer a:last-of-type{border-bottom:0}
.mobile-drawer a:hover{color:var(--brand)}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600}
.mobile-drawer .btn{margin-top:14px}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0;font-size:13px;color:var(--muted)}
.crumb-bar ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb-bar li{display:flex;align-items:center;gap:8px}
.crumb-bar li + li::before{content:"/";color:#C3CCDC}
.crumb-bar a{transition:color .18s ease}
.crumb-bar a:hover{color:var(--brand)}
.crumb-bar span[aria-current]{color:var(--ink);font-weight:600}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;overflow:hidden;
  background:var(--bg-soft);
  border-bottom:1px solid var(--line);
  padding:44px 0 56px;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.12;
}
.page-head .container{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--accent-50);color:var(--accent);
  font-size:12.5px;font-weight:600;letter-spacing:.4px;
}
.page-head h1{
  margin-top:18px;
  font-size:clamp(28px,4.6vw,42px);
  line-height:1.28;font-weight:700;letter-spacing:-.5px;
  max-width:820px;
}
.page-lead{
  margin-top:16px;max-width:640px;
  font-size:17px;line-height:1.85;color:var(--muted);
}
.head-meta{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:28px;
  padding-top:22px;border-top:1px solid var(--line);
}
.head-meta div{display:flex;align-items:baseline;gap:8px}
.head-meta strong{
  font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;
  color:var(--brand);letter-spacing:-.5px;
}
.head-meta span{font-size:13px;color:var(--muted)}

/* ---------- 主体两栏 ---------- */
.faq-layout{
  display:grid;grid-template-columns:264px minmax(0,1fr);
  gap:56px;align-items:start;
  padding:64px 0 88px;
}

/* ---------- 左侧目录 ---------- */
.aside-box{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 18px;
  box-shadow:var(--shadow-card);
}
.aside-title{
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;
  padding:0 8px 12px;
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:8px;
  font-size:14.5px;color:var(--muted);
  border-left:2px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.toc-list a .num{
  font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;color:#9AA6BC;
}
.toc-list a:hover{background:var(--bg-soft);color:var(--ink)}
.toc-list a.is-active{
  background:var(--brand-50);color:var(--brand);
  border-left-color:var(--brand);font-weight:600;
}
.toc-list a.is-active .num{color:var(--brand)}
.toc-list a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.aside-card{
  margin-top:18px;padding-top:18px;border-top:1px solid var(--line);
}
.aside-card figure{
  border-radius:12px;overflow:hidden;aspect-ratio:16/10;background:var(--bg-soft);
}
.aside-card img{width:100%;height:100%;object-fit:cover}
.aside-card p{
  margin-top:12px;font-size:13.5px;line-height:1.75;color:var(--muted);
}
.aside-card .link-text{margin-top:10px;font-size:13.5px}

/* ---------- 右侧分组 ---------- */
.group{margin-bottom:64px;scroll-margin-top:96px}
.group:last-of-type{margin-bottom:56px}
.group-head{display:flex;align-items:center;gap:14px;margin-bottom:10px}
.group-num{
  flex:none;display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;
  background:var(--brand-50);color:var(--brand);
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.group h2{font-size:24px;font-weight:700;letter-spacing:-.3px;line-height:1.4}
.group-desc{color:var(--muted);font-size:15px;line-height:1.8;margin-bottom:20px;max-width:640px}

.index-list{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);
}
.index-item{
  display:flex;align-items:center;gap:16px;
  padding:16px 22px;border-bottom:1px solid var(--line);
  transition:background-color .18s ease;
}
.index-item:last-child{border-bottom:0}
.index-item:hover{background:var(--bg-soft)}
.index-item:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.index-item .idx{
  flex:none;width:26px;font-size:13px;font-weight:600;
  font-variant-numeric:tabular-nums;color:#9AA6BC;
}
.index-item .label{
  font-size:15.5px;line-height:1.7;color:var(--ink);
  transition:color .18s ease;
}
.index-item .arrow{
  margin-left:auto;flex:none;font-size:12px;color:#B6C1D4;
  transition:transform .2s ease,color .2s ease;
}
.index-item:hover .label{color:var(--brand)}
.index-item:hover .arrow{color:var(--brand);transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-block{
  margin-top:8px;
}
.faq-intro{padding-bottom:8px}
.faq-intro h2{font-size:24px;font-weight:700;letter-spacing:-.3px}
.faq-intro p{margin-top:8px;color:var(--muted);font-size:15px;max-width:640px}
.faq-list{border-top:1px solid var(--line);margin-top:16px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;gap:14px;
  padding:20px 4px;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.faq-item summary .idx{
  flex:none;font-size:13px;font-weight:600;color:#9AA6BC;
  font-variant-numeric:tabular-nums;
}
.faq-item summary .plus{
  position:relative;margin-left:auto;flex:none;
  width:20px;height:20px;transition:transform .2s ease;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-item summary .plus::before{left:9px;top:2px;width:2px;height:16px}
.faq-item summary .plus::after{top:9px;left:2px;height:2px;width:16px}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item .faq-answer{
  padding:0 44px 22px 44px;
  font-size:15.5px;line-height:1.85;color:var(--muted);
}
.faq-item .faq-answer p + p{margin-top:12px}

/* ---------- CTA 横条 ---------- */
.cta-band{
  margin-top:64px;
  background:var(--brand-50);
  border-radius:var(--radius-lg);
  padding:32px 32px 32px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:30px;bottom:30px;width:4px;
  background:var(--accent);border-radius:0 4px 4px 0;
}
.cta-band h3{font-size:20px;font-weight:700;letter-spacing:-.2px}
.cta-band p{margin-top:6px;font-size:14.5px;color:var(--muted);line-height:1.8;max-width:520px}
.cta-band .btn{flex:none}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding-top:64px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex;align-items:baseline;gap:6px}
.footer-brand span:first-child{font-size:19px;font-weight:700;letter-spacing:.3px}
.footer-brand .sub{font-size:12.5px;font-weight:500;color:rgba(255,255,255,.62);letter-spacing:.4px}
.footer-desc{margin-top:14px;max-width:320px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.66)}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:rgba(255,255,255,.55);margin-bottom:16px;
}
.footer-col a{
  display:block;font-size:14.5px;color:rgba(255,255,255,.78);
  padding:6px 0;transition:color .18s ease;
}
.footer-col a i{font-size:11px;margin-left:6px;transition:transform .2s ease}
.footer-col a:hover{color:#fff}
.footer-col a:hover i{transform:translateX(3px)}
.footer-col a:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:4px}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);margin-bottom:10px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:22px 0 28px;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 移动底部 Tab ---------- */
.tabbar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav,.header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:64px}
  .brand-main{font-size:17.5px}
  .brand-sub{font-size:11.5px}
  .faq-layout{grid-template-columns:1fr;gap:36px;padding:40px 0 64px}
  .aside-box{position:static;padding:14px}
  .aside-title{padding:0 4px 10px}
  .toc-list{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
  .toc-list::-webkit-scrollbar{display:none}
  .toc-list a{
    flex:none;white-space:nowrap;border-left:0;
    border:1px solid var(--line);border-radius:999px;
    padding:7px 14px;font-size:13.5px;
  }
  .toc-list a.is-active{border-color:var(--brand)}
  .aside-card{display:none}
  .page-head{padding:32px 0 42px}
  .head-meta{gap:20px}
  .group{margin-bottom:48px;scroll-margin-top:80px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px 28px 28px;gap:20px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-desc{max-width:none}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    height:calc(60px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    box-shadow:0 -10px 24px -20px rgba(16,26,46,.6);
  }
  .tab-item{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:3px;font-size:10px;color:var(--muted);position:relative;
    transition:color .18s ease;
  }
  .tab-item i{font-size:18px;line-height:1}
  .tab-item:hover,.tab-item:active{color:var(--brand)}
  .tab-item:focus-visible{outline:2px solid var(--brand);outline-offset:-3px;border-radius:8px}
  .tab-item.is-active{color:var(--brand);font-weight:600}
  .tab-item.is-active::after{
    content:"";position:absolute;top:7px;right:calc(50% - 15px);
    width:4px;height:4px;border-radius:50%;background:var(--brand);
  }
  body.page-body{padding-bottom:76px}
}

@media (max-width:640px){
  .container{padding:0 20px}
  .page-head h1{letter-spacing:-.3px}
  .page-lead{font-size:15.5px}
  .head-meta{flex-direction:column;gap:10px;padding-top:18px;margin-top:20px}
  .head-meta div{justify-content:flex-start}
  .group h2,.faq-intro h2{font-size:20px}
  .group-desc{font-size:14px}
  .index-item{padding:14px 16px;gap:12px;align-items:flex-start}
  .index-item .label{font-size:14.5px}
  .index-item .arrow{margin-top:6px}
  .faq-item summary{font-size:15px;padding:16px 2px}
  .faq-item .faq-answer{padding:0 12px 18px 30px;font-size:14.5px}
  .cta-band h3{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .btn{height:46px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}