/* roulang page: index */
:root{
    --brand:#1C4FD9;
    --brand-deep:#143C9E;
    --brand-soft:#EAF0FE;
    --accent:#0E9F8E;
    --accent-soft:#E6F6F3;
    --spark:#F2792B;
    --ink:#0F172A;
    --muted:#475569;
    --faint:#94A3B8;
    --line:#E2E8F0;
    --divider:#EEF2F7;
    --alt:#F5F8FD;
    --radius:16px;
    --radius-lg:20px;
    --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
    --shadow-hover:0 16px 40px -16px rgba(28,79,217,.22);
    --container:1200px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:#fff;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;height:auto;border:0;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p,blockquote,figure{margin:0;}
  ::selection{background:var(--brand-soft);color:var(--brand-deep);}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
  @media (min-width:768px){ .container{padding:0 32px;} }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 28px;border-radius:10px;
    font-size:15px;font-weight:600;line-height:1;
    border:1px solid transparent;white-space:nowrap;cursor:pointer;
    transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
  .btn-ghost:hover{background:var(--brand-soft);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;}
  .btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}
  .btn-lg{height:52px;}
  .btn-nav{height:42px;padding:0 20px;font-size:14px;display:none;}
  @media (min-width:1024px){ .btn-nav{display:inline-flex;} }
  .btn-block{width:100%;}

  .text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:15px;font-weight:600;transition:color .2s ease;}
  .text-link .arrow{display:inline-block;transition:transform .2s ease;}
  .text-link:hover{color:var(--brand-deep);}
  .text-link:hover .arrow{transform:translateX(4px);}
  .text-link:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:3px;border-radius:4px;}

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .25s ease;
  }
  .site-header.is-scrolled{box-shadow:0 6px 22px -18px rgba(15,23,42,.45);}
  .header-bar{display:flex;align-items:center;height:68px;gap:16px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{position:relative;width:22px;height:22px;border-radius:6px;background:var(--brand);flex:0 0 auto;}
  .brand-mark::after{content:"";position:absolute;left:5px;right:5px;bottom:5px;height:3px;border-radius:2px;background:var(--accent);}
  .brand-name{font-size:19px;font-weight:800;letter-spacing:0;color:var(--ink);}
  .nav-main{display:none;align-items:center;gap:2px;margin-left:28px;}
  @media (min-width:1024px){ .nav-main{display:flex;} }
  .nav-item{
    position:relative;display:inline-flex;align-items:center;height:68px;padding:0 13px;
    font-size:15px;color:var(--muted);transition:color .2s ease;
  }
  .nav-item:hover{color:var(--brand);}
  .nav-item.is-active{color:var(--brand);font-weight:600;}
  .nav-item.is-active::after{
    content:"";position:absolute;left:13px;right:13px;bottom:20px;height:2px;border-radius:2px;background:var(--brand);
  }
  .nav-item:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:-4px;border-radius:6px;}
  .header-right{margin-left:auto;display:flex;align-items:center;gap:10px;}
  .nav-toggle{
    width:44px;height:44px;border-radius:10px;display:inline-flex;flex-direction:column;
    align-items:center;justify-content:center;gap:5px;transition:background-color .2s ease;
  }
  .nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
  .nav-toggle:hover{background:var(--alt);}
  .nav-toggle:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;}
  @media (min-width:1024px){ .nav-toggle{display:none;} }

  .drawer{
    position:fixed;left:0;right:0;top:68px;bottom:0;z-index:70;background:#fff;
    display:flex;flex-direction:column;padding:8px 20px 40px;overflow-y:auto;
    opacity:0;transform:translateY(-8px);pointer-events:none;
    transition:opacity .22s ease,transform .22s ease;
  }
  .drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
  @media (min-width:1024px){ .drawer{display:none;} }
  .drawer-link{display:block;font-size:19px;font-weight:600;line-height:56px;color:var(--ink);border-bottom:1px solid var(--divider);}
  .drawer-link.is-active{color:var(--brand);}
  .drawer-link:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:-2px;border-radius:6px;}
  .drawer-foot{margin-top:auto;padding-top:28px;}
  .drawer-contact{margin-top:14px;font-size:14px;color:var(--faint);}

  /* ---------- Hero ---------- */
  .hero{padding:48px 0 64px;background:#fff;}
  @media (min-width:768px){ .hero{padding:60px 0 76px;} }
  @media (min-width:1024px){ .hero{padding:72px 0 92px;} }
  .hero-grid{display:grid;gap:40px;}
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:repeat(12,1fr);gap:32px;align-items:center;}
    .hero-text{grid-column:span 6;}
    .hero-visual{grid-column:span 6;}
  }
  .hero-eyebrow{
    display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:600;letter-spacing:.06em;
    border:1px solid #d3e0fb;
  }
  .hero-title{
    margin-top:20px;
    font-size:clamp(30px,4.2vw,48px);
    line-height:1.18;
    font-weight:800;
    letter-spacing:0;
    color:var(--ink);
  }
  .hero-sub{margin-top:18px;max-width:560px;font-size:16.5px;line-height:1.85;color:var(--muted);}
  @media (min-width:768px){ .hero-sub{font-size:17px;} }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .hero-trust{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:30px;}
  .hero-trust li{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);}
  .trust-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:0 0 auto;}
  .hero-visual{position:relative;}
  .hero-img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:var(--radius-lg);background:var(--brand-soft);
  }
  .hero-float{
    position:absolute;left:18px;bottom:18px;
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:16px 22px;box-shadow:var(--shadow-card);
    display:flex;flex-direction:column;
  }
  .hero-float strong{font-size:30px;line-height:1.1;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;}
  .hero-float span{margin-top:4px;font-size:13px;color:var(--muted);}

  /* ---------- 通用板块 ---------- */
  .section{padding:56px 0;}
  @media (min-width:768px){ .section{padding:72px 0;} }
  @media (min-width:1024px){ .section{padding:96px 0;} }
  .section-alt{background:var(--alt);}

  .section-head{max-width:720px;margin-bottom:32px;}
  .section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .section-head.center .section-label{padding-left:0;}
  .section-head.center .section-label::before{display:none;}
  .section-label{
    position:relative;display:inline-block;padding-left:14px;
    font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand);margin-bottom:10px;
  }
  .section-label::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:4px;height:14px;border-radius:2px;
    background:linear-gradient(180deg,var(--brand) 0 50%,var(--accent) 50% 100%);
  }
  .section-title{font-size:clamp(23px,2.6vw,34px);line-height:1.3;font-weight:700;color:var(--ink);}
  .section-desc{margin-top:14px;font-size:16px;line-height:1.8;color:var(--muted);max-width:640px;}
  .section-head.center .section-desc{margin-left:auto;margin-right:auto;}
  .section-head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:32px;}
  .section-head-row .section-head{margin-bottom:0;}

  /* ---------- 卖点三连 ---------- */
  .feature-row{display:grid;gap:24px;}
  @media (min-width:768px){ .feature-row{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .feature-row{grid-template-columns:5fr 4fr 3fr;} }
  .feature-card{
    display:flex;flex-direction:column;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:26px 24px;box-shadow:var(--shadow-card);
    transition:box-shadow .25s ease,transform .25s ease;
  }
  .feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .feature-num{
    font-size:34px;line-height:1;font-weight:800;color:var(--accent);
    font-variant-numeric:tabular-nums;margin-bottom:18px;
  }
  .feature-card h3{font-size:20px;font-weight:600;line-height:1.45;margin-bottom:10px;color:var(--ink);}
  .feature-card p{font-size:15px;line-height:1.85;color:var(--muted);}
  .feature-card-lg{padding:32px 28px;}
  .feature-card-lg h3{font-size:22px;}

  /* ---------- 场景 / 流程 ---------- */
  .scene-grid{display:grid;gap:36px;}
  @media (min-width:1024px){ .scene-grid{grid-template-columns:repeat(2,1fr);gap:56px;align-items:center;} }
  .scene-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:18px;background:var(--brand-soft);
  }
  .step-list{margin-top:28px;}
  .step-item{position:relative;display:flex;gap:18px;padding-bottom:26px;}
  .step-item:last-child{padding-bottom:0;}
  .step-item:not(:last-child)::before{
    content:"";position:absolute;left:19px;top:44px;bottom:4px;width:1px;background:var(--line);
  }
  .step-index{
    flex:0 0 40px;width:40px;height:40px;border-radius:50%;
    background:var(--accent-soft);border:1px solid #cfe9e4;color:var(--accent);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
  }
  .step-item h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:6px;color:var(--ink);}
  .step-item p{font-size:15px;line-height:1.8;color:var(--muted);}

  /* ---------- 资讯列表（CMS 区） ---------- */
  .news-grid{display:grid;gap:24px;grid-template-columns:1fr;}
  @media (min-width:768px){ .news-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1280px){ .news-grid{grid-template-columns:repeat(3,1fr);} }
  .news-card{
    display:flex;flex-direction:column;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:box-shadow .25s ease,transform .25s ease;
  }
  .news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .news-thumb{display:block;overflow:hidden;aspect-ratio:16/10;background:var(--brand-soft);}
  .news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .news-card:hover .news-thumb img{transform:scale(1.03);}
  .news-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1;}
  .news-title{
    font-size:18px;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 .2s ease;
  }
  .news-card:hover .news-title{color:var(--brand);}
  .news-summary{
    font-size:14px;line-height:1.7;color:var(--muted);
    display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-meta{
    margin-top:auto;padding-top:6px;display:flex;align-items:center;justify-content:space-between;
    gap:12px;font-size:13px;color:var(--faint);font-variant-numeric:tabular-nums;
  }
  .news-meta .meta-more{color:var(--brand);font-weight:600;}
  @media (min-width:768px){
    .news-card-wide{grid-column:1 / -1;flex-direction:row;}
    .news-card-wide .news-thumb{flex:0 0 46%;aspect-ratio:auto;min-height:260px;}
    .news-card-wide .news-body{padding:28px 32px;}
    .news-card-wide .news-title{font-size:22px;}
    .news-card-wide .news-summary{font-size:15px;-webkit-line-clamp:3;}
  }
  .badge{
    display:inline-flex;align-items:center;align-self:flex-start;
    height:24px;padding:0 10px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.04em;
    background:var(--brand-soft);color:var(--brand-deep);border:1px solid #d3e0fb;
  }
  .badge-accent{background:var(--accent-soft);color:#0B7C6E;border-color:#cfe9e4;}
  .empty-state{
    background:var(--alt);border:1px dashed var(--line);border-radius:var(--radius);
    padding:56px 24px;text-align:center;color:var(--muted);font-size:15px;
  }
  .empty-icon{
    width:44px;height:44px;margin:0 auto 14px;border-radius:12px;
    background:var(--brand-soft);border:1px solid #d3e0fb;
    display:flex;align-items:center;justify-content:center;color:var(--brand);font-weight:800;font-size:16px;
  }

  /* ---------- 社会认同 ---------- */
  .stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 24px;}
  @media (min-width:768px){ .stat-row{grid-template-columns:repeat(4,1fr);} }
  .stat strong{
    display:block;font-size:clamp(30px,3.2vw,40px);line-height:1.1;font-weight:800;
    color:var(--brand);font-variant-numeric:tabular-nums;
  }
  .stat-line{width:24px;height:3px;border-radius:2px;background:var(--spark);margin:12px 0 8px;}
  .stat span{font-size:14px;color:var(--muted);}

  .partner-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:52px;}
  @media (min-width:640px){ .partner-row{grid-template-columns:repeat(4,1fr);} }
  .partner{
    display:flex;align-items:center;justify-content:center;text-align:center;
    height:64px;padding:0 12px;border-radius:12px;background:#fff;border:1px solid var(--line);
    font-size:14px;color:var(--faint);
    filter:grayscale(100%);opacity:.78;
    transition:filter .25s ease,opacity .25s ease,box-shadow .25s ease,color .25s ease;
  }
  .partner:hover{filter:none;opacity:1;color:var(--muted);box-shadow:var(--shadow-card);}

  .quote-grid{display:grid;gap:24px;margin-top:48px;}
  @media (min-width:768px){ .quote-grid{grid-template-columns:repeat(2,1fr);align-items:start;} }
  .quote-card{
    position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:30px 28px 26px;box-shadow:var(--shadow-card);
  }
  @media (min-width:768px){ .quote-grid > :nth-child(2){margin-top:32px;} }
  .quote-card::before{
    content:"\201C";position:absolute;top:14px;left:22px;
    font-family:Georgia,"Times New Roman",serif;font-size:48px;line-height:1;color:var(--brand-soft);
  }
  .quote-card p{position:relative;font-size:15px;line-height:1.9;color:var(--muted);}
  .quote-author{margin-top:18px;padding-top:16px;border-top:1px solid var(--divider);font-size:14px;font-weight:600;color:var(--ink);}
  .quote-author span{display:block;margin-top:2px;font-size:13px;font-weight:400;color:var(--faint);}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:880px;margin:0 auto;}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:first-child{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--brand);}
  .faq-q:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;border-radius:6px;}
  .faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--spark);border-radius:2px;
    transition:transform .25s ease,opacity .25s ease;
  }
  .faq-icon::before{left:0;top:9px;width:20px;height:2px;}
  .faq-icon::after{left:9px;top:0;width:2px;height:20px;}
  .faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
  .faq-a p{padding:0 0 22px;max-width:760px;font-size:15px;line-height:1.85;color:var(--muted);}

  /* ---------- CTA 带 ---------- */
  .cta-band{
    background:var(--brand);color:#fff;border-radius:var(--radius-lg);
    padding:40px 28px;display:grid;gap:24px;
  }
  @media (min-width:1024px){ .cta-band{grid-template-columns:1fr auto;align-items:center;padding:52px 48px;gap:40px;} }
  .cta-band h2{font-size:clamp(21px,2.3vw,30px);line-height:1.35;font-weight:700;color:#fff;}
  .cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.82);}
  .cta-band .btn{background:#fff;color:var(--brand);}
  .cta-band .btn:hover{background:var(--brand-soft);}
  .cta-band .btn:focus-visible{outline:2px solid rgba(255,255,255,.65);outline-offset:2px;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#0F172A;color:#94A3B8;padding:56px 0 0;}
  .footer-grid{display:grid;gap:34px;grid-template-columns:1fr;}
  @media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;} }
  .footer-brand{grid-column:1 / -1;}
  @media (min-width:1024px){ .footer-brand{grid-column:auto;} }
  .footer-brand .brand-name{color:#fff;}
  .footer-intro{margin-top:16px;max-width:320px;font-size:14px;line-height:1.9;color:#94A3B8;}
  .footer-contact{margin-top:16px;font-size:14px;line-height:2;color:#94A3B8;}
  .footer-contact a{color:#CBD5E1;transition:color .2s ease;}
  .footer-contact a:hover{color:#fff;}
  .footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
  .footer-links a{
    display:block;font-size:14px;line-height:2.2;color:#94A3B8;
    transition:color .2s ease;
  }
  .footer-links a:hover{color:#fff;}
  .footer-links a:focus-visible{outline:2px solid rgba(255,255,255,.45);outline-offset:2px;border-radius:4px;}
  .footer-bottom{
    margin-top:46px;border-top:1px solid rgba(255,255,255,.08);
    padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:13px;color:#64748B;
  }

  /* ---------- 移动端吸底条 ---------- */
  .mobile-bar{
    position:fixed;left:0;right:0;bottom:0;z-index:80;
    display:flex;align-items:center;gap:12px;
    background:#fff;border-top:1px solid var(--line);
    box-shadow:0 -8px 24px -16px rgba(15,23,42,.5);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    transform:translateY(110%);transition:transform .2s ease;
  }
  .mobile-bar.is-visible{transform:none;}
  @media (min-width:768px){ .mobile-bar{display:none;} }
  .mobile-bar p{
    flex:1;min-width:0;margin:0;font-size:14px;color:var(--muted);
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .mobile-bar .btn{height:44px;padding:0 18px;font-size:14px;flex:0 0 auto;}
  @media (max-width:767px){ body{padding-bottom:76px;} }

/* roulang page: category1 */
:root{
  --brand:#1C4FD9;
  --brand-dark:#143C9E;
  --brand-light:#EAF0FE;
  --accent:#0E9F8E;
  --accent-light:#E6F6F3;
  --spark:#F2792B;
  --ink:#0F172A;
  --ink-2:#475569;
  --ink-3:#94A3B8;
  --line:#E2E8F0;
  --line-2:#EEF2F7;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FD;
  --r-card:16px;
  --r-lg:20px;
  --r-btn:10px;
  --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
  --shadow-hover:0 16px 40px -16px rgba(28,79,217,.22);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{list-style:none;padding:0;}
::selection{background:var(--brand-light);color:var(--brand-dark);}

body .container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){
  body .container{padding:0 32px;}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{
  box-shadow:0 10px 26px -20px rgba(15,23,42,.45);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:68px;
}
.header-left{
  display:flex;
  align-items:center;
  gap:38px;
  min-width:0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:800;
  letter-spacing:0;
  color:var(--ink);
  white-space:nowrap;
}
.brand-mark{
  width:22px;
  height:22px;
  border-radius:7px;
  background:linear-gradient(135deg,var(--brand) 0 55%,var(--accent) 55% 100%);
  box-shadow:0 6px 12px -6px rgba(28,79,217,.6);
  flex:none;
}
.nav-main{
  display:flex;
  align-items:center;
  gap:26px;
}
.nav-item{
  position:relative;
  display:inline-block;
  padding:22px 0;
  font-size:15px;
  color:var(--ink-2);
  white-space:nowrap;
  transition:color .2s ease;
}
.nav-item:hover{color:var(--brand);}
.nav-item.is-active{
  color:var(--brand);
  font-weight:600;
}
.nav-item.is-active::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}
.header-right{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
}
.icon-btn{
  width:44px;
  height:44px;
  border-radius:var(--r-btn);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-2);
  border:1px solid var(--line);
  background:#fff;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-light);background:var(--brand-light);}
.icon-btn:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;}
.menu-toggle{
  width:44px;
  height:44px;
  border-radius:var(--r-btn);
  display:none;
  align-items:center;
  justify-content:center;
  color:var(--ink);
  border:1px solid var(--line);
  background:#fff;
}
.menu-toggle:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;}

/* 移动抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:#fff;
  padding:20px 20px calc(28px + env(safe-area-inset-bottom));
  display:flex;
  flex-direction:column;
  transform:translateY(-102%);
  visibility:hidden;
  transition:transform .3s ease,visibility .3s ease;
  overflow-y:auto;
}
.drawer.is-open{
  transform:translateY(0);
  visibility:visible;
}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.drawer-nav{margin-top:12px;}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:56px;
  font-size:18px;
  color:var(--ink);
  border-bottom:1px solid var(--line-2);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-nav a span.arrow{color:var(--ink-3);font-size:16px;}
.drawer-foot{margin-top:auto;padding-top:24px;}
.drawer-foot p{font-size:14px;color:var(--ink-2);line-height:2;}

/* ============ 按钮系统 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--r-btn);
  font-size:16px;
  font-weight:600;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{
  background:var(--brand);
  color:#fff;
}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
.btn-primary:active{transform:none;}
.btn-outline{
  background:#fff;
  color:var(--brand);
  border:1px solid var(--brand);
}
.btn-outline:hover{background:var(--brand-light);}
.btn-white{
  background:#fff;
  color:var(--brand);
}
.btn-white:hover{background:var(--brand-light);transform:translateY(-1px);}
.btn:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;}
.btn-sm{height:42px;padding:0 20px;font-size:15px;}
.btn-lg{height:52px;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-size:15px;
  font-weight:600;
}
.link-more svg{transition:transform .2s ease;}
.link-more:hover svg{transform:translateX(4px);}
.link-more:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;border-radius:4px;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.04em;
  font-weight:600;
  background:var(--brand-light);
  color:var(--brand-dark);
  border:1px solid #D6E1FB;
}
.badge-accent{
  background:var(--accent-light);
  color:#0B7C6E;
  border-color:#CBE9E3;
}
.badge-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:38px;
  height:26px;
  padding:0 10px;
  border-radius:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  background:var(--accent-light);
  color:#0B7C6E;
  border:1px solid #CBE9E3;
}

/* ============ Hero ============ */
.hero{
  background:linear-gradient(180deg,var(--bg-alt) 0%,#FFFFFF 100%);
  padding:36px 0 72px;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-2);
  margin-bottom:28px;
  flex-wrap:wrap;
}
.crumb a{color:var(--ink-2);transition:color .2s ease;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--ink-3);}
.crumb .now{color:var(--ink);font-weight:600;}
.hero-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:40px;
  align-items:center;
}
.hero-copy{grid-column:span 6;}
.hero-media{grid-column:span 6;}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  font-weight:600;
  color:var(--brand);
  margin-bottom:16px;
}
.hero-eyebrow::before{
  content:"";
  width:22px;
  height:4px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand) 0 55%,var(--accent) 55% 100%);
}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.18;
  font-weight:800;
  letter-spacing:0;
  color:var(--ink);
  margin-bottom:18px;
}
.hero-sub{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-2);
  max-width:34em;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:12px 26px;
}
.trust-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-2);
}
.trust-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  flex:none;
}
.hero-figure{
  position:relative;
  height:430px;
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--brand-light);
  box-shadow:var(--shadow-card);
}
.hero-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-track{
  height:4px;
  width:120px;
  border-radius:2px;
  margin-top:44px;
  background:linear-gradient(90deg,var(--brand) 0 55%,var(--accent) 55% 100%);
}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{
  position:relative;
  padding-left:18px;
  margin-bottom:40px;
  max-width:740px;
}
.section-head::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:4px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--brand) 0 55%,var(--accent) 55% 100%);
}
.section-head .eyebrow{
  display:block;
  font-size:12px;
  letter-spacing:.08em;
  font-weight:600;
  color:var(--brand);
  margin-bottom:8px;
}
.section-head h2{
  font-size:clamp(26px,3vw,38px);
  line-height:1.3;
  font-weight:700;
  color:var(--ink);
  margin-bottom:12px;
}
.section-head p{
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
}

/* ============ 图文能力卡 ============ */
.feature-list{display:flex;flex-direction:column;gap:56px;}
.feature-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:center;
}
.feature-row.reverse .feature-media{order:2;}
.feature-media{
  border-radius:18px;
  overflow:hidden;
  background:var(--brand-light);
  aspect-ratio:4 / 3;
  box-shadow:var(--shadow-card);
}
.feature-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.feature-row:hover .feature-media img{transform:scale(1.03);}
.feature-body h3{
  font-size:22px;
  line-height:1.45;
  font-weight:600;
  color:var(--ink);
  margin:14px 0 12px;
}
.feature-body p{
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  margin-bottom:18px;
}

/* ============ 规格对比条 ============ */
.spec-bar{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.spec-col{
  padding:32px 28px;
}
.spec-col + .spec-col{border-left:1px solid var(--line);}
.spec-col h3{
  font-size:19px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:6px;
}
.spec-col .spec-note{
  font-size:14px;
  color:var(--ink-3);
  margin-bottom:18px;
}
.spec-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:15px;
  line-height:1.9;
  color:var(--ink-2);
  padding:6px 0;
}
.spec-list li::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
  margin-top:12px;
  flex:none;
}
.spec-col.is-key h3{color:var(--brand);}
.spec-col.is-key .spec-list li::before{background:var(--spark);}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-q:focus-visible{outline:2px solid rgba(28,79,217,.35);outline-offset:2px;border-radius:6px;}
.faq-icon{
  position:relative;
  width:18px;
  height:18px;
  flex:none;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--spark);
  border-radius:2px;
  transition:transform .28s ease,opacity .28s ease;
}
.faq-icon::before{left:50%;top:0;width:2px;height:18px;transform:translateX(-50%);}
.faq-icon::after{top:50%;left:0;height:2px;width:18px;transform:translateY(-50%);}
.faq-item.is-open .faq-icon::before{transform:translateX(-50%) scaleY(0);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-a p{
  font-size:15px;
  line-height:1.85;
  color:var(--ink-2);
  padding:0 4px 24px;
}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--brand);
  border-radius:var(--r-lg);
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  color:#fff;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.35;
  font-weight:700;
  color:#fff;
  margin-bottom:10px;
}
.cta-band p{
  font-size:16px;
  line-height:1.8;
  color:rgba(255,255,255,.82);
  max-width:38em;
}

/* ============ 页脚 ============ */
.footer-track{
  height:4px;
  background:linear-gradient(90deg,var(--brand) 0 50%,var(--accent) 50% 100%);
}
.site-footer{
  background:#0F172A;
  color:#94A3B8;
  padding:64px 0 28px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .brand{color:#fff;}
.footer-intro{
  line-height:1.9;
  margin:18px 0;
  max-width:30em;
}
.footer-contact{line-height:2.2;margin:0;}
.footer-contact a{color:#94A3B8;transition:color .2s ease;}
.footer-contact a:hover{color:#fff;}
.footer-title{
  color:#fff;
  font-size:14px;
  font-weight:600;
  margin-bottom:14px;
}
.footer-links a{
  display:block;
  color:#94A3B8;
  line-height:2.2;
  transition:color .2s ease;
}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;
  color:#64748B;
  flex-wrap:wrap;
}

/* ============ 移动吸底条 ============ */
.mobile-cta{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:none;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:60px;
  padding:8px 16px calc(8px + env(safe-area-inset-bottom));
  background:#fff;
  border-top:1px solid var(--line);
  box-shadow:0 -8px 22px -16px rgba(15,23,42,.6);
}
.mobile-cta span{
  font-size:14px;
  color:var(--ink-2);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-main{display:none;}
  .menu-toggle{display:inline-flex;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-copy,.hero-media{grid-column:span 1;}
  .hero-figure{height:320px;}
  .section{padding:72px 0;}
  .feature-row{gap:32px;}
  .feature-row.reverse .feature-media{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:span 2;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .hero{padding:24px 0 56px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-figure{height:260px;}
  .feature-row{grid-template-columns:1fr;gap:24px;}
  .feature-media{aspect-ratio:16 / 10;}
  .spec-bar{grid-template-columns:1fr;}
  .spec-col{padding:24px 8px;}
  .spec-col + .spec-col{border-left:0;border-top:1px solid var(--line);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-band .btn{width:100%;}
  .mobile-cta{display:flex;}
  body{padding-bottom:72px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-brand{grid-column:span 1;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .header-left{gap:16px;}
  .brand{font-size:17px;}
  .header-right .btn{display:none;}
  .hero h1{font-size:28px;}
}

/* roulang page: article */
:root{
  --brand:#1C4FD9;
  --brand-dark:#143C9E;
  --brand-light:#EAF0FE;
  --accent:#0E9F8E;
  --accent-light:#E6F6F3;
  --spark:#F2792B;
  --ink:#0F172A;
  --ink-soft:#475569;
  --ink-mute:#94A3B8;
  --line:#E2E8F0;
  --line-soft:#EEF2F7;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FD;
  --radius:16px;
  --radius-lg:20px;
  --radius-sm:10px;
  --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
  --shadow-hover:0 16px 40px -16px rgba(28,79,217,.22);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--font);
  font-size:16px;line-height:1.75;
  color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
[hidden]{display:none !important;}

:focus-visible{outline:2px solid rgba(28,79,217,.38);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){ .container{padding:0 32px;} }

/* ============ 品牌标识 ============ */
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  position:relative;width:24px;height:24px;border-radius:7px;
  background:var(--brand);overflow:hidden;flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;left:-4px;bottom:-7px;width:24px;height:14px;
  background:var(--accent);transform:rotate(-38deg);
}
.brand-name{font-size:20px;font-weight:700;letter-spacing:0;color:var(--ink);}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:70;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -16px rgba(15,23,42,.35);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.nav-main{display:none;align-items:center;gap:4px;margin-left:6px;}
.nav-item{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  font-size:15px;color:var(--ink-soft);border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-item:hover{color:var(--brand);background:var(--brand-light);}
.nav-item.is-active{color:var(--brand);font-weight:600;}
.nav-item.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;
  color:var(--ink-soft);cursor:pointer;transition:.2s;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(28,79,217,.4);background:var(--brand-light);}
.menu-toggle{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;
  color:var(--ink);cursor:pointer;transition:.2s;
}
.menu-toggle:hover{border-color:rgba(28,79,217,.4);color:var(--brand);}
@media (min-width:1024px){
  .nav-main{display:flex;}
  .menu-toggle{display:none;}
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
.btn-primary:active{transform:none;background:var(--brand-dark);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-light);transform:translateY(-1px);}
.btn-white{background:#fff;color:var(--brand);}
.btn-white:hover{background:#F0F5FF;transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn:disabled{background:var(--line);color:var(--ink-mute);cursor:not-allowed;transform:none;}

/* 阅读进度条 */
.progress-track{position:absolute;left:0;right:0;bottom:-1px;height:3px;background:transparent;}
.progress-fill{display:block;height:100%;width:0;background:var(--brand);transition:width .12s linear;}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;top:68px;left:0;right:0;bottom:0;z-index:90;
  background:#fff;padding:20px;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
  overflow-y:auto;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:none;}
.drawer-link{
  display:flex;align-items:center;height:56px;font-size:19px;font-weight:500;
  color:var(--ink);border-bottom:1px solid var(--line-soft);
}
.drawer-link.is-active{color:var(--brand);font-weight:600;}
.drawer-cta{width:100%;margin-top:24px;}
.drawer-contact{margin-top:20px;font-size:14px;line-height:2;color:var(--ink-mute);}
@media (min-width:1024px){
  .mobile-drawer{display:none;}
}

/* ============ 面包屑 ============ */
.article-main{padding:32px 0 0;}
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:14px;color:var(--ink-soft);margin-bottom:28px;
}
.crumbs a{transition:color .2s;}
.crumbs a:hover{color:var(--brand);}
.crumb-sep{color:#CBD5E1;}
.crumb-current{color:var(--ink-mute);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-head{max-width:820px;margin:0 auto 32px;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  font-size:12px;letter-spacing:.04em;border-radius:999px;
  color:var(--brand-dark);background:var(--brand-light);border:1px solid rgba(28,79,217,.18);
}
.article-title{
  font-size:clamp(26px,3.4vw,38px);line-height:1.34;font-weight:800;
  color:var(--ink);margin:16px 0 18px;letter-spacing:0;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:14px;color:var(--ink-mute);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#CBD5E1;}

.article-cover{
  max-width:960px;margin:0 auto 44px;border-radius:18px;overflow:hidden;
  border:1px solid var(--line);background:var(--brand-light);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ============ 正文排版 ============ */
.article-layout{display:grid;grid-template-columns:1fr;gap:48px;justify-content:center;}
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,760px) 240px;}
}
.article-body{
  max-width:760px;width:100%;margin:0 auto;
  font-size:17px;line-height:1.9;color:var(--ink);
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:clamp(21px,2.2vw,26px);font-weight:700;line-height:1.4;
  margin:2.4em 0 .8em;padding-left:14px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.5;margin:1.8em 0 .6em;}
.article-body h4{font-size:17px;font-weight:600;margin:1.5em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1.3em 1.4em;padding:0;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin:0 0 .5em;line-height:1.85;}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;background:var(--bg-alt);
  border-left:3px solid var(--accent);border-radius:0 12px 12px 0;
  color:var(--ink-soft);font-size:16px;
}
.article-body img{border-radius:12px;margin:1.6em auto;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--ink-mute);text-align:center;margin-top:10px;}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand);}
.article-body strong{font-weight:600;color:var(--brand-dark);}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0;
  font-variant-numeric:tabular-nums;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body thead th{background:var(--brand-light);color:var(--brand-dark);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FAFCFF;}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:2.4em 0;}
@media (max-width:768px){
  .article-body{font-size:16px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}

/* 侧边目录 */
.article-toc{display:none;}
@media (min-width:1280px){
  .article-toc{
    display:block;position:sticky;top:96px;align-self:start;
    border-left:2px solid var(--line-soft);padding-left:18px;
  }
}
.toc-title{font-size:13px;letter-spacing:.06em;color:var(--ink-mute);margin-bottom:12px;}
.toc-list{display:flex;flex-direction:column;gap:8px;}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;color:var(--ink-soft);
  transition:color .2s ease;border-left:2px solid transparent;padding-left:2px;
}
.toc-list a:hover{color:var(--brand);}

/* 无内容空态 */
.empty-box{
  background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);
  padding:48px 32px;text-align:center;
}
.empty-box h2{font-size:22px;font-weight:700;margin:0 0 12px;padding:0;border-left:0;}
.empty-box p{font-size:15px;color:var(--ink-soft);margin:0 0 24px;}
.empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:14px;
  background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;
}

/* 标签与文末 */
.article-tags{
  max-width:760px;margin:44px auto 0;display:flex;flex-wrap:wrap;gap:10px;
  align-items:center;
}
.article-tags .tag-label{font-size:13px;color:var(--ink-mute);margin-right:4px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  font-size:13px;border-radius:999px;color:var(--ink-soft);
  background:var(--bg-alt);border:1px solid var(--line);transition:.2s;
}
.tag:hover{color:var(--brand);border-color:rgba(28,79,217,.35);background:var(--brand-light);}

.runway-line{
  position:relative;max-width:760px;height:4px;margin:48px auto;
  background:var(--line-soft);border-radius:2px;overflow:hidden;
}
.runway-line::before{content:"";position:absolute;left:0;top:0;width:96px;height:100%;background:var(--brand);}
.runway-line::after{content:"";position:absolute;left:76px;top:0;width:48px;height:100%;background:var(--accent);}

.article-foot{
  max-width:760px;margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.article-foot .note{font-size:14px;color:var(--ink-mute);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);
}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover::after{transform:translateX(4px);}

/* ============ CTA ============ */
.cta-wrap{padding:64px 0 72px;}
.cta-band{
  background:var(--brand);border-radius:var(--radius-lg);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.4;margin:0 0 10px;}
.cta-band p{color:rgba(255,255,255,.84);font-size:15px;line-height:1.8;margin:0;max-width:560px;}
@media (max-width:640px){
  .cta-band{padding:32px 24px;}
  .cta-band .btn{width:100%;}
}

/* ============ 页脚 ============ */
.site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
@media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr;gap:32px;} }
@media (max-width:640px){ .footer-grid{grid-template-columns:1fr;} }
.site-footer .brand-name{color:#fff;}
.footer-intro{font-size:14px;line-height:1.9;color:#94A3B8;margin:16px 0;}
.footer-contact{font-size:14px;line-height:2;color:#94A3B8;}
.footer-contact a{color:#94A3B8;transition:color .2s;}
.footer-contact a:hover{color:#fff;}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin:0 0 16px;}
.footer-links{display:flex;flex-direction:column;}
.footer-links a{font-size:14px;line-height:2.2;color:#94A3B8;transition:color .2s;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(148,163,184,.18);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:#64748B;
}

/* roulang page: category2 */
:root{
  --brand:#1C4FD9; --brand-dark:#143C9E; --brand-light:#EAF0FE;
  --accent:#0E9F8E; --accent-light:#E6F6F3; --accent-deep:#0B7A6E;
  --spark:#F2792B;
  --ink:#0F172A; --ink-2:#475569; --ink-3:#94A3B8;
  --line:#E2E8F0; --line-soft:#EEF2F7;
  --bg:#FFFFFF; --bg-alt:#F5F8FD;
  --radius-card:16px; --radius-lg:20px; --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
  --shadow-hover:0 16px 40px -16px rgba(28,79,217,.22);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:17px; line-height:1.8; color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;background:var(--brand-light)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid rgba(28,79,217,.5);outline-offset:2px}
body.drawer-open{overflow:hidden}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky; top:0; z-index:60; background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(15,23,42,.45)}
.nav-wrap{display:flex;align-items:center;min-height:68px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
.brand-mark{
  position:relative;width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  overflow:hidden;
}
.brand-mark::before,.brand-mark::after{
  content:"";position:absolute;left:6px;height:3px;border-radius:2px;
}
.brand-mark::before{top:8px;width:18px;background:#fff}
.brand-mark::after{bottom:8px;width:12px;background:var(--accent)}
.brand-name{font-size:19px;font-weight:800;letter-spacing:0;color:var(--ink)}
.nav-main{display:flex;align-items:center;gap:4px;flex:1 1 auto}
.nav-item{
  position:relative;padding:9px 12px;font-size:15px;color:var(--ink-2);
  border-radius:8px;transition:color .2s ease;white-space:nowrap;
}
.nav-item::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-item:hover{color:var(--brand)}
.nav-item:hover::after{transform:scaleX(1)}
.nav-item.is-active{color:var(--brand);font-weight:600}
.nav-item.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-search{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);
  transition:all .2s ease;background:#fff;
}
.nav-search:hover{border-color:#C7D5F5;color:var(--brand);background:var(--brand-light)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink);font-size:17px;background:#fff;
}
.nav-toggle:hover{border-color:#C7D5F5;color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none;background:var(--brand-dark)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-outline:hover{background:var(--brand-light)}
.btn-outline:active{background:#DCE7FD}
.btn-lg{height:52px;padding:0 32px;font-size:16px}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);
  font-size:15px;font-weight:600;min-height:44px;
}
.btn-text i{transition:transform .2s ease}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;background:var(--accent-light);
  color:var(--accent-deep);border:1px solid #C7E9E3;
}
.badge-brand{background:var(--brand-light);color:var(--brand-dark);border-color:#D8E3FB}

/* ---------- 跑道装饰线 ---------- */
.track-line{position:relative;display:inline-block;width:46px;height:8px;flex:0 0 auto}
.track-line::before{content:"";position:absolute;left:0;top:0;width:34px;height:4px;border-radius:2px;background:var(--brand)}
.track-line::after{content:"";position:absolute;right:0;bottom:0;width:20px;height:4px;border-radius:2px;background:var(--accent)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:#fff;display:none;
  flex-direction:column;padding:0 24px 32px;overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer-head{display:flex;align-items:center;justify-content:space-between;min-height:68px;border-bottom:1px solid var(--line)}
.drawer-nav{display:flex;flex-direction:column;padding-top:12px}
.drawer-item{
  font-size:19px;font-weight:600;color:var(--ink);line-height:56px;
  border-bottom:1px solid var(--line-soft);
}
.drawer-item.is-active{color:var(--brand)}
.drawer-foot{margin-top:auto;padding-top:28px;display:flex;flex-direction:column;gap:16px}
.drawer-contact{font-size:14px;color:var(--ink-2);line-height:1.9}

/* ---------- Hero ---------- */
.hero-solution{
  padding:64px 0 84px;
  background:linear-gradient(180deg,#F5F8FD 0%,#FFFFFF 100%);
}
.hero-center{max-width:820px;margin:0 auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;
  font-weight:600;color:var(--brand);
}
.hero-solution h1{
  font-size:clamp(30px,4.4vw,52px);line-height:1.18;font-weight:800;
  margin-top:18px;letter-spacing:0;
}
.hero-sub{
  max-width:640px;margin:18px auto 0;font-size:17px;line-height:1.85;color:var(--ink-2);
}
.hero-actions{margin-top:32px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-points{
  margin-top:26px;display:flex;gap:26px;justify-content:center;flex-wrap:wrap;
  font-size:14px;color:var(--ink-2);
}
.hero-points li{display:inline-flex;align-items:center;gap:8px}
.hero-points i{color:var(--accent)}
.hero-visual{margin-top:48px}
.hero-visual img{
  width:100%;height:clamp(230px,38vw,440px);object-fit:cover;
  border-radius:var(--radius-lg);box-shadow:var(--shadow-card);
}

/* ---------- 板块 ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px}
.section-head.is-center{margin:0 auto;text-align:center}
.section-head .label{
  display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;
  font-weight:600;color:var(--brand);
}
.section-head.is-center .label{justify-content:center}
.section-head h2{
  font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700;margin-top:14px;
}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px}

/* ---------- 三段图文 ---------- */
.zigzag{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.zigzag-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:18px;box-shadow:var(--shadow-card);
}
.zigzag-body h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;font-weight:700;margin-top:14px}
.zigzag-body p{margin-top:14px;color:var(--ink-2);font-size:16px}
.zigzag-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.zigzag-list li{position:relative;padding-left:24px;font-size:15px;color:var(--ink-2)}
.zigzag-list li::before{
  content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--accent-light);border:2px solid var(--accent);
}
.zigzag-body .btn-text{margin-top:20px}
.zigzag.is-reverse .zigzag-media{order:2}

/* ---------- 流程条 ---------- */
.flow{display:grid;grid-template-columns:repeat(5,1fr);margin-top:52px}
.flow-step{position:relative;padding:0 14px;text-align:center}
.flow-step:not(:last-child)::after{
  content:"";position:absolute;top:24px;left:calc(50% + 34px);right:calc(-50% + 34px);
  height:2px;background:#D8E3FB;
}
.flow-dot{
  position:relative;z-index:2;width:48px;height:48px;margin:0 auto;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid #D8E3FB;color:var(--brand);
  font-weight:700;font-size:16px;font-variant-numeric:tabular-nums;
  box-shadow:0 6px 18px -12px rgba(28,79,217,.5);
}
.flow-step h3{margin-top:18px;font-size:17px;font-weight:600}
.flow-step p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--ink-2)}

/* ---------- 数据条 ---------- */
.stats-band{display:grid;grid-template-columns:repeat(3,1fr);margin-top:44px}
.stat-item{text-align:center;padding:10px 24px}
.stat-item + .stat-item{border-left:1px solid var(--line)}
.stat-num{
  font-size:clamp(32px,4vw,42px);font-weight:800;line-height:1.1;
  color:var(--brand);font-variant-numeric:tabular-nums;
}
.stat-line{width:24px;height:3px;border-radius:2px;background:var(--spark);margin:14px auto 12px}
.stat-label{font-size:14px;color:var(--ink-2)}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--brand-light);border-radius:var(--radius-lg);
  padding:40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);line-height:1.35;font-weight:700}
.cta-band p{margin-top:12px;font-size:15px;color:var(--ink-2);max-width:620px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-name{color:#fff}
.footer-intro{margin-top:16px;font-size:14px;line-height:1.9;max-width:320px}
.footer-contact{margin-top:16px;font-size:14px;line-height:2}
.footer-contact a{color:#94A3B8;transition:color .2s ease}
.footer-contact a:hover{color:#fff}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin:0 0 12px}
.footer-links{display:flex;flex-direction:column}
.footer-links a{font-size:14px;line-height:2.2;color:#94A3B8;transition:color .2s ease}
.footer-links a:hover{color:#fff}
.footer-links span{font-size:14px;line-height:2.2;color:#64748B}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;
  font-size:13px;color:#64748B;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .zigzag{gap:44px}
}
@media (max-width:1023px){
  .nav-main,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .hero-solution{padding:48px 0 64px}
  .section{padding:72px 0}
  .zigzag{grid-template-columns:1fr;gap:28px}
  .zigzag.is-reverse .zigzag-media{order:0}
  .flow{grid-template-columns:1fr;gap:22px}
  .flow-step{display:grid;grid-template-columns:48px 1fr;gap:16px;text-align:left;padding:0}
  .flow-step::after{display:none}
  .flow-step h3{margin-top:2px}
  .flow-step p{margin-top:4px}
  .flow-dot{margin:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  body{font-size:16px}
  .section{padding:56px 0}
  .hero-sub{font-size:16px}
  .stats-band{grid-template-columns:1fr;gap:28px;margin-top:32px}
  .stat-item + .stat-item{border-left:0;border-top:1px solid var(--line);padding-top:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category3 */
:root{
    --brand:#1C4FD9;
    --brand-dark:#143C9E;
    --brand-light:#EAF0FE;
    --accent:#0E9F8E;
    --accent-light:#E6F6F3;
    --spark:#F2792B;
    --text:#0F172A;
    --text-2:#475569;
    --text-3:#94A3B8;
    --border:#E2E8F0;
    --divider:#EEF2F7;
    --bg-alt:#F5F8FD;
    --radius-card:16px;
    --radius-lg:20px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
    --shadow-hover:0 16px 40px -16px rgba(28,79,217,.22);
    --container:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
    font-size:17px;
    line-height:1.8;
    color:var(--text);
    background:#FFFFFF;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
  ul,ol{padding:0;list-style:none;}
  :focus-visible{outline:2px solid rgba(28,79,217,.55);outline-offset:2px;border-radius:6px;}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
  @media (min-width:768px){.container{padding:0 32px;}}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;background:#FFFFFF;
    border-bottom:1px solid var(--border);
    transition:box-shadow .22s ease;
  }
  .site-header.is-scrolled{box-shadow:0 1px 0 rgba(15,23,42,.04),0 10px 26px -20px rgba(15,23,42,.55);}
  .header-inner{display:flex;align-items:center;gap:20px;height:68px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{position:relative;width:26px;height:26px;border-radius:8px;background:var(--brand);overflow:hidden;flex-shrink:0;}
  .brand-mark::after{content:"";position:absolute;left:-5px;bottom:7px;width:36px;height:4px;background:var(--accent);transform:rotate(-30deg);}
  .brand-name{font-size:18px;font-weight:800;letter-spacing:0;color:var(--text);}

  .nav-main{display:none;}
  @media (min-width:1024px){
    .nav-main{display:flex;align-items:center;gap:2px;margin-left:6px;}
  }
  .nav-item{position:relative;display:inline-flex;align-items:center;height:68px;padding:0 12px;font-size:15px;font-weight:500;color:var(--text-2);transition:color .18s ease;}
  .nav-item:hover{color:var(--brand);}
  .nav-item.is-active{color:var(--brand);font-weight:700;}
  .nav-item.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:20px;height:2px;border-radius:2px;background:var(--brand);}

  .header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
  .icon-btn{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text-2);transition:all .18s ease;}
  .icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-light);}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 26px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;white-space:nowrap;
    border:1px solid transparent;cursor:pointer;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
  .btn-primary:active{transform:none;background:var(--brand-dark);}
  .btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand);}
  .btn-ghost:hover{background:var(--brand-light);}
  .btn-ghost:active{background:var(--brand-light);}
  .btn-light{background:rgba(255,255,255,.94);color:var(--brand-dark);border-color:rgba(255,255,255,.94);}
  .btn-light:hover{background:#fff;transform:translateY(-1px);}
  .btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}
  .btn-sm{height:44px;padding:0 18px;font-size:14px;}

  .menu-toggle{width:44px;height:44px;display:grid;place-items:center;gap:5px;border:1px solid var(--border);border-radius:10px;background:#fff;}
  .menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s ease,opacity .2s ease;}
  .menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  @media (min-width:1024px){.menu-toggle{display:none;}}

  .mobile-drawer{
    display:none;position:fixed;top:68px;left:0;right:0;bottom:0;
    background:#fff;z-index:55;overflow-y:auto;padding:8px 20px 48px;
    border-top:1px solid var(--divider);
  }
  .mobile-drawer.is-open{display:block;}
  .drawer-link{display:flex;align-items:center;height:56px;font-size:19px;font-weight:600;color:var(--text);border-bottom:1px solid var(--divider);}
  .drawer-link.is-active{color:var(--brand);}
  .drawer-foot{margin-top:28px;display:grid;gap:14px;}
  .drawer-contact{font-size:14px;color:var(--text-2);line-height:2;}
  .drawer-contact a{color:var(--text-2);}
  body.drawer-open{overflow:hidden;}

  /* ============ Hero ============ */
  .hero-cat3{position:relative;display:flex;align-items:flex-end;min-height:560px;background:#0F172A;overflow:hidden;}
  .hero-cat3-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
  .hero-cat3-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.20) 0%,rgba(15,23,42,.55) 52%,rgba(15,23,42,.84) 100%);}
  .hero-cat3-inner{position:relative;z-index:2;width:100%;padding:96px 0 64px;}
  .hero-cat3-panel{
    max-width:760px;border-radius:var(--radius-lg);
    padding:34px 30px 32px;
    background:linear-gradient(135deg,rgba(15,23,42,.86),rgba(20,60,158,.62));
    border:1px solid rgba(255,255,255,.12);
  }
  .hero-cat3 h1{
    font-size:clamp(30px,4.4vw,52px);line-height:1.18;font-weight:800;letter-spacing:0;
    color:#fff;margin:16px 0 18px;
  }
  .hero-lead{font-size:17px;line-height:1.85;color:rgba(255,255,255,.86);max-width:640px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .badge-glass{
    display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
    font-size:12px;letter-spacing:.04em;color:#fff;
    background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);
  }
  @media (max-width:767px){
    .hero-cat3{min-height:520px;}
    .hero-cat3-inner{padding:72px 0 44px;}
    .hero-cat3-panel{padding:26px 20px 26px;}
  }

  /* ============ 数据条 ============ */
  .stats-section{position:relative;z-index:6;margin-top:-60px;padding:0;}
  .stats-strip{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);padding:30px 12px;
  }
  .stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px 12px;}
  @media (min-width:768px){.stats-grid{grid-template-columns:repeat(4,1fr);}}
  .stat{text-align:center;padding:0 8px;}
  .stat + .stat{border-left:1px solid var(--divider);}
  @media (max-width:767px){
    .stat:nth-child(odd){border-left:0;}
    .stat:nth-child(3){border-left:0;}
  }
  .stat-num{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--brand);line-height:1.2;font-variant-numeric:tabular-nums;}
  .stat-line{width:24px;height:3px;border-radius:2px;background:var(--spark);margin:10px auto 10px;}
  .stat-label{font-size:14px;color:var(--text-2);}
  @media (max-width:767px){.stats-section{margin-top:-40px;}}

  /* ============ 区块与分段标题 ============ */
  .section{padding:88px 0;}
  .section-alt{background:var(--bg-alt);}
  .section-tight{padding:72px 0 88px;}
  @media (max-width:1023px){.section{padding:72px 0;}.section-tight{padding:60px 0 72px;}}
  @media (max-width:767px){.section{padding:56px 0;}.section-tight{padding:48px 0 56px;}}

  .sec-head{max-width:760px;margin-bottom:36px;}
  .sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .sec-label{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;font-weight:700;color:var(--brand);}
  .rail{position:relative;width:4px;height:16px;border-radius:2px;background:var(--brand);flex-shrink:0;}
  .rail::after{content:"";position:absolute;left:0;top:6px;width:4px;height:16px;border-radius:2px;background:var(--accent);opacity:.9;}
  .sec-title{font-size:clamp(24px,3.2vw,34px);line-height:1.3;font-weight:700;color:var(--text);margin:14px 0 12px;}
  .sec-desc{font-size:16px;line-height:1.8;color:var(--text-2);}

  /* ============ 案例混合网格 ============ */
  .case-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:1024px){
    .case-grid{grid-template-columns:repeat(12,1fr);gap:28px;}
    .case-card--lg{grid-column:span 8;grid-row:span 2;}
    .case-card--sm{grid-column:span 4;}
  }
  .case-card{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .case-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(28,79,217,.24);}
  .case-link{display:block;height:100%;}
  .case-media{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s ease;background:var(--brand-light);}
  .case-card--lg .case-media{aspect-ratio:16/9;}
  .case-card:hover .case-media{transform:scale(1.03);}
  .case-body{padding:24px;}
  .case-card--lg .case-body{padding:28px;}
  .case-body h3{font-size:20px;line-height:1.5;font-weight:700;color:var(--text);margin:14px 0 10px;transition:color .2s ease;}
  .case-card:hover .case-body h3{color:var(--brand);}
  .case-body p{font-size:15px;line-height:1.8;color:var(--text-2);}
  .case-card--lg .case-body p{font-size:16px;}

  .badge{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
    font-size:12px;letter-spacing:.04em;font-weight:600;
    background:var(--brand-light);color:var(--brand-dark);border:1px solid rgba(28,79,217,.18);
  }
  .badge-accent{background:var(--accent-light);color:#0B7E70;border-color:rgba(14,159,142,.22);}

  .link-more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--brand);}
  .link-more .arrow{transition:transform .2s ease;}
  .case-card:hover .link-more .arrow{transform:translateX(4px);}

  /* ============ 流程 ============ */
  .flow{display:grid;grid-template-columns:1fr;gap:26px;margin-top:8px;}
  @media (min-width:768px){.flow{grid-template-columns:repeat(5,1fr);gap:20px;}}
  .flow-step{position:relative;padding-top:44px;}
  .flow-step::before{content:"";position:absolute;top:16px;left:36px;right:-20px;height:2px;background:var(--divider);}
  .flow-step:last-child::before{display:none;}
  .flow-dot{
    position:absolute;top:6px;left:0;width:30px;height:30px;border-radius:50%;
    display:grid;place-items:center;font-size:13px;font-weight:700;
    background:var(--brand-light);color:var(--brand-dark);
    border:1px solid rgba(28,79,217,.26);z-index:2;font-variant-numeric:tabular-nums;
  }
  .flow-title{font-size:17px;font-weight:700;color:var(--text);margin-bottom:8px;}
  .flow-desc{font-size:14px;line-height:1.8;color:var(--text-2);}
  @media (max-width:767px){
    .flow-step{padding-top:0;padding-left:44px;}
    .flow-step::before{top:30px;left:14px;right:auto;width:2px;height:calc(100% + 26px);}
    .flow-dot{top:0;left:0;}
  }

  /* ============ 引语 ============ */
  .quote-block{max-width:880px;margin:0 auto;border-left:4px solid var(--spark);padding:6px 0 6px 28px;}
  .quote-text{font-size:clamp(19px,2.3vw,22px);line-height:1.75;font-weight:600;color:var(--text);}
  .quote-source{margin-top:16px;font-size:14px;color:var(--text-3);}

  /* ============ CTA ============ */
  .cta-band{
    background:var(--brand-light);border-radius:var(--radius-lg);
    padding:36px 26px;display:flex;flex-direction:column;gap:22px;
  }
  @media (min-width:768px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:48px;gap:40px;}
  }
  .cta-title{font-size:clamp(22px,2.8vw,30px);line-height:1.35;font-weight:700;color:var(--text);}
  .cta-desc{margin-top:10px;font-size:16px;line-height:1.8;color:var(--text-2);max-width:640px;}

  /* ============ 页脚 ============ */
  .site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 28px;font-size:14px;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
  @media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
  .footer-brand .brand-name{color:#fff;}
  .footer-intro{line-height:1.9;margin:16px 0 14px;color:#94A3B8;}
  .footer-contact{line-height:2.1;color:#94A3B8;}
  .footer-contact a{color:#94A3B8;transition:color .2s ease;}
  .footer-contact a:hover{color:#fff;}
  .footer-title{font-size:14px;font-weight:600;color:#fff;margin:0 0 12px;}
  .footer-links a{display:block;font-size:14px;line-height:2.2;color:#94A3B8;transition:color .2s ease;}
  .footer-links a:hover{color:#fff;}
  .footer-bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid rgba(148,163,184,.2);
    display:flex;flex-direction:column;gap:8px;font-size:13px;color:#64748B;
  }
  @media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

  @media (max-width:767px){
    .brand-name{font-size:17px;}
    .header-inner{height:64px;}
    .mobile-drawer{top:64px;}
  }

/* roulang page: category4 */
:root{
    --brand:#1C4FD9;
    --brand-dark:#143C9E;
    --brand-light:#EAF0FE;
    --accent:#0E9F8E;
    --accent-light:#E6F6F3;
    --spark:#F2792B;
    --ink:#0F172A;
    --ink-soft:#475569;
    --ink-mute:#94A3B8;
    --line:#E2E8F0;
    --line-soft:#EEF2F7;
    --bg:#FFFFFF;
    --bg-alt:#F5F8FD;
    --radius:16px;
    --radius-lg:20px;
    --radius-sm:10px;
    --shadow-1:0 1px 2px rgba(15,23,42,.04), 0 10px 30px -14px rgba(15,23,42,.14);
    --shadow-2:0 16px 40px -16px rgba(28,79,217,.22);
    --container:1200px;
    --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{list-style:none;padding:0;}
  .num,.stat-num,.flow-num,.spec-table td{font-variant-numeric:tabular-nums;}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
  @media (min-width:768px){.container{padding:0 32px;}}

  :focus-visible{outline:2px solid rgba(28,79,217,.45);outline-offset:2px;}

  /* ============ 导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:70;
    background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .25s ease;
  }
  .site-header.is-scrolled{
    box-shadow:0 1px 0 rgba(15,23,42,.03), 0 10px 26px -20px rgba(15,23,42,.45);
  }
  .nav-wrap{
    display:flex;align-items:center;gap:36px;
    height:68px;
  }
  .brand{
    display:inline-flex;align-items:center;gap:10px;
    font-size:19px;font-weight:700;color:var(--ink);letter-spacing:0;
    min-height:44px;
  }
  .brand-mark{
    position:relative;width:28px;height:28px;border-radius:9px;
    background:var(--brand);flex:0 0 28px;
  }
  .brand-mark::before{
    content:"";position:absolute;left:6px;right:6px;top:7px;height:4px;border-radius:2px;background:#fff;opacity:.95;
  }
  .brand-mark::after{
    content:"";position:absolute;left:6px;bottom:7px;width:11px;height:4px;border-radius:2px;background:var(--accent);
  }
  .nav-main{display:flex;align-items:center;gap:26px;}
  .nav-item{
    position:relative;
    display:inline-flex;align-items:center;min-height:44px;
    font-size:15px;color:var(--ink-soft);
    transition:color .2s ease;
    white-space:nowrap;
  }
  .nav-item:hover{color:var(--brand);}
  .nav-item.is-active{color:var(--brand);font-weight:600;}
  .nav-item.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;border-radius:2px;background:var(--brand);
  }
  .nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
  .icon-btn{
    width:44px;height:44px;border-radius:var(--radius-sm);
    border:1px solid var(--line);background:#fff;color:var(--ink-soft);
    display:inline-flex;align-items:center;justify-content:center;
    cursor:pointer;transition:all .2s ease;
  }
  .icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-light);}
  .icon-btn:active{transform:translateY(1px);}

  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:var(--radius-sm);
    border:1px solid var(--line);background:#fff;cursor:pointer;
    align-items:center;justify-content:center;color:var(--ink);
  }
  .nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
  .nav-toggle span{
    display:block;position:relative;width:20px;height:2px;border-radius:2px;background:currentColor;
  }
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:currentColor;
  }
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}

  .drawer{
    display:none;position:fixed;left:0;right:0;top:68px;bottom:0;z-index:65;
    background:#fff;overflow-y:auto;padding:16px 20px calc(28px + env(safe-area-inset-bottom));
  }
  .drawer.is-open{display:block;}
  .drawer-link{
    display:block;font-size:19px;font-weight:500;color:var(--ink);
    padding:16px 4px;border-bottom:1px solid var(--line-soft);
  }
  .drawer-link.is-active{color:var(--brand);}
  .drawer-contact{margin-top:24px;font-size:14px;line-height:2;color:var(--ink-mute);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 28px;border-radius:var(--radius-sm);
    font-size:15px;font-weight:600;letter-spacing:0;
    border:1px solid transparent;cursor:pointer;
    transition:all .2s ease;text-align:center;
  }
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
  .btn-primary:active{transform:none;background:var(--brand-dark);}
  .btn-outline{background:#fff;color:var(--brand);border-color:var(--brand);}
  .btn-outline:hover{background:var(--brand-light);transform:translateY(-1px);}
  .btn-outline:active{transform:none;}
  .btn-lg{height:52px;padding:0 32px;}
  .btn-sm{height:44px;padding:0 20px;font-size:14px;}
  .btn-block{width:100%;}
  .btn:disabled{opacity:.45;cursor:not-allowed;transform:none;}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--brand);font-size:15px;font-weight:600;min-height:44px;
  }
  .btn-text .arw{transition:transform .2s ease;}
  .btn-text:hover .arw{transform:translateX(4px);}

  /* ============ 徽章 / 标签 ============ */
  .badge{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    font-size:12px;letter-spacing:.04em;font-weight:600;border-radius:999px;
    background:var(--accent-light);color:#0B7A6C;border:1px solid #BFE4DE;
  }
  .badge-brand{background:var(--brand-light);color:var(--brand-dark);border-color:#CBD9F7;}
  .badge-spark{background:#FEF0E5;color:#C25F16;border-color:#F8D8BE;}

  /* ============ Hero（窄栏文档流） ============ */
  .hero{
    padding:clamp(48px,6vw,76px) 0 clamp(40px,5vw,60px);
    background:#fff;
  }
  .hero-inner{max-width:880px;margin:0 auto;}
  .hero h1{
    font-size:clamp(28px,3.8vw,44px);
    line-height:1.22;font-weight:800;letter-spacing:0;margin:18px 0 18px;
  }
  .hero-lead{
    font-size:17px;line-height:1.85;color:var(--ink-soft);max-width:760px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .hero-meta{
    display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:28px;
    font-size:13px;color:var(--ink-mute);
  }
  .hero-meta span{display:inline-flex;align-items:center;gap:8px;}
  .hero-meta span::before{
    content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);
  }
  .hero-rule{
    position:relative;width:140px;height:4px;border-radius:2px;background:var(--brand);margin-top:34px;
  }
  .hero-rule::after{
    content:"";position:absolute;left:0;top:10px;width:72px;height:4px;border-radius:2px;background:var(--accent);
  }

  /* ============ 通用区块 ============ */
  .section{padding:clamp(56px,7vw,92px) 0;}
  .section-alt{background:var(--bg-alt);}
  .sec-kicker{
    display:inline-flex;align-items:center;
    font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand);
  }
  .sec-kicker::before{
    content:"";width:4px;height:16px;margin-right:10px;border-radius:2px;
    background:linear-gradient(to bottom,var(--brand) 0 60%,var(--accent) 60% 100%);
  }
  .sec-title{
    font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700;color:var(--ink);
    margin-top:14px;
  }
  .sec-desc{margin-top:14px;font-size:16px;color:var(--ink-soft);max-width:680px;}

  /* ============ 文档双栏 ============ */
  .doc-layout{
    display:grid;grid-template-columns:200px minmax(0,1fr);gap:56px;align-items:start;
  }
  .doc-toc{position:sticky;top:96px;}
  .toc-title{
    font-size:13px;font-weight:600;color:var(--ink);letter-spacing:.04em;
    padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:12px;
  }
  .toc-list{display:flex;flex-direction:column;}
  .toc-list a{
    font-size:14px;line-height:2.1;color:var(--ink-soft);border-left:2px solid transparent;
    padding-left:12px;min-height:44px;display:flex;align-items:center;
    transition:all .2s ease;
  }
  .toc-list a:hover{color:var(--brand);border-left-color:var(--brand);background:var(--brand-light);}

  .doc-body{max-width:820px;}
  .doc-body p{font-size:17px;line-height:1.9;color:var(--ink-soft);margin-bottom:1.2em;}
  .doc-body h2{
    position:relative;
    font-size:clamp(22px,2.5vw,30px);line-height:1.35;font-weight:700;color:var(--ink);
    margin:2.4em 0 .8em;padding-left:16px;
    scroll-margin-top:96px;
  }
  .doc-body h2:first-child{margin-top:0;}
  .doc-body h2::before{
    content:"";position:absolute;left:0;top:.22em;width:4px;height:1em;border-radius:2px;background:var(--brand);
  }
  .doc-body h3{font-size:20px;line-height:1.45;font-weight:600;color:var(--ink);margin:1.8em 0 .6em;}
  .doc-body ul{margin:0 0 1.4em;}
  .doc-body ul li{
    position:relative;padding-left:22px;font-size:16px;line-height:1.85;color:var(--ink-soft);margin-bottom:8px;
  }
  .doc-body ul li::before{
    content:"";position:absolute;left:3px;top:.72em;width:7px;height:7px;border-radius:50%;
    background:var(--accent-light);border:1.5px solid var(--accent);
  }
  .doc-figure{margin:28px 0;}
  .doc-figure img{width:100%;border-radius:12px;object-fit:cover;aspect-ratio:16/10;}
  .doc-figure figcaption{font-size:13px;line-height:1.7;color:var(--ink-mute);text-align:center;margin-top:10px;}

  .note-box{
    border-left:3px solid var(--accent);background:var(--bg-alt);
    padding:20px 22px;border-radius:0 12px 12px 0;margin:0 0 1.6em;
  }
  .note-box p{margin-bottom:0;font-size:15px;line-height:1.8;}

  /* ============ 流程步骤 ============ */
  .flow{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin:28px 0 8px;}
  .flow-step{position:relative;padding-top:4px;}
  .flow-step:not(:last-child)::after{
    content:"";position:absolute;left:48px;right:-18px;top:26px;height:2px;background:var(--line);
  }
  .flow-num{
    position:relative;z-index:1;
    width:36px;height:36px;border-radius:999px;
    background:var(--brand-light);border:1px solid #CBD9F7;color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
  }
  .flow-name{margin-top:12px;font-size:16px;font-weight:600;color:var(--ink);}
  .flow-text{margin-top:6px;font-size:14px;line-height:1.75;color:var(--ink-soft);}

  /* ============ 规格表 ============ */
  .table-scroll{overflow-x:auto;margin:8px 0 28px;border-radius:12px;}
  .spec-table{width:100%;min-width:520px;border-collapse:collapse;font-size:15px;}
  .spec-table th,.spec-table td{
    border:1px solid var(--line);padding:12px 14px;text-align:left;line-height:1.7;
  }
  .spec-table th{background:var(--brand-light);color:var(--ink);font-weight:600;}
  .spec-table td{color:var(--ink-soft);}
  .spec-table tbody tr:nth-child(even){background:#F9FBFE;}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:880px;margin:0 auto;}
  .faq-list{margin-top:32px;border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-h{margin:0;font-size:inherit;font-weight:inherit;}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
    padding:22px 0;background:none;border:0;text-align:left;cursor:pointer;
    font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--brand);}
  .faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--spark);border-radius:2px;
  }
  .faq-icon::before{left:0;top:9px;width:20px;height:2px;}
  .faq-icon::after{left:9px;top:0;width:2px;height:20px;transition:transform .25s ease;}
  .faq-item.is-open .faq-icon::after{transform:scaleY(0);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
  .faq-a-inner{
    padding:0 0 22px;max-width:760px;font-size:15px;line-height:1.8;color:var(--ink-soft);
  }

  /* ============ 相关入口 ============ */
  .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px;}
  .link-card{
    display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:24px;box-shadow:var(--shadow-1);transition:all .25s ease;
  }
  .link-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#C7D8F8;}
  .link-card h3{font-size:19px;font-weight:600;color:var(--ink);margin:12px 0 8px;transition:color .2s ease;}
  .link-card:hover h3{color:var(--brand);}
  .link-card p{font-size:14px;line-height:1.75;color:var(--ink-soft);margin-bottom:14px;}

  /* ============ CTA 带 ============ */
  .cta-band{
    background:var(--brand-light);
    border-radius:var(--radius-lg);
    padding:clamp(28px,4vw,48px);
    display:flex;align-items:center;justify-content:space-between;
    gap:28px;flex-wrap:wrap;
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;font-weight:700;color:var(--ink);}
  .cta-band p{margin-top:12px;font-size:16px;line-height:1.8;color:var(--ink-soft);max-width:640px;}

  /* ============ 页脚 ============ */
  .site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 28px;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
  .footer-brand .brand{color:#fff;}
  .footer-intro{margin:18px 0;font-size:14px;line-height:1.9;color:#94A3B8;max-width:320px;}
  .footer-contact{margin:0;font-size:14px;line-height:2;color:#94A3B8;}
  .footer-contact a{color:#E2E8F0;border-bottom:1px solid rgba(255,255,255,.25);}
  .footer-contact a:hover{color:#fff;}
  .footer-title{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px;letter-spacing:.02em;}
  .footer-links a{
    display:block;font-size:14px;line-height:2.2;color:#94A3B8;transition:color .2s ease;
  }
  .footer-links a:hover{color:#fff;}
  .footer-links span{display:block;font-size:14px;line-height:2.2;color:#64748B;}
  .footer-bottom{
    margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:#64748B;
  }

  /* ============ 响应式 ============ */
  @media (max-width:1279px){
    .related-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:1023px){
    .nav-main,.nav-tools{display:none;}
    .nav-toggle{display:inline-flex;}
    .doc-layout{grid-template-columns:1fr;gap:28px;}
    .doc-toc{position:static;top:auto;}
    .toc-title{margin-bottom:10px;}
    .toc-list{
      flex-direction:row;gap:10px;overflow-x:auto;padding-bottom:8px;
      -webkit-overflow-scrolling:touch;
    }
    .toc-list a{
      flex:0 0 auto;border:1px solid var(--line);border-radius:999px;
      padding:0 16px;min-height:38px;font-size:13px;background:#fff;
    }
    .toc-list a:hover{border-color:var(--brand);background:var(--brand-light);}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .footer-brand{grid-column:1 / -1;}
    .footer-intro{max-width:none;}
  }
  @media (max-width:767px){
    .hero{padding-top:36px;}
    .hero-actions{gap:12px;}
    .hero-actions .btn{width:100%;}
    .flow{grid-template-columns:1fr;gap:22px;}
    .flow-step:not(:last-child)::after{display:none;}
    .flow-step{padding-left:48px;padding-top:0;position:relative;}
    .flow-num{position:absolute;left:0;top:2px;}
    .flow-name{margin-top:0;}
    .related-grid{grid-template-columns:1fr;}
    .faq-q{font-size:16px;padding:18px 0;}
    .cta-band{flex-direction:column;align-items:flex-start;}
    .cta-band .btn{width:100%;}
  }
  @media (max-width:519px){
    .footer-grid{grid-template-columns:1fr;}
    .brand{font-size:17px;}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    *{transition-duration:.01ms !important;}
  }