/* roulang page: index */
:root{
    --brand:#0F6FCE;
    --brand-hover:#0C5CAF;
    --brand-soft:#E8F2FD;
    --accent:#FF7A45;
    --accent-hover:#F1632C;
    --accent-soft:#FFF1EB;
    --success:#12B886;
    --warn:#E5484D;
    --ink:#0F1F33;
    --muted:#5B6E84;
    --faint:#8A9AAC;
    --line:#E2E9F2;
    --page:#F4F7FB;
    --surf:#FFFFFF;
    --deep:#102A43;
    --shadow-card:0 1px 2px rgba(15,31,51,.04),0 8px 24px rgba(15,31,51,.06);
    --shadow-hover:0 12px 32px rgba(15,31,51,.10);
    --shadow-cta:0 8px 20px rgba(255,122,69,.28);
    --radius-card:16px;
    --radius-ctrl:10px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--page);
    color:var(--ink);
    font-family:'PingFang SC','HarmonyOS Sans','Noto Sans SC','Microsoft YaHei','Inter',system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit}
  ul,ol{margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  ::selection{background:rgba(15,111,206,.18);color:var(--ink)}
  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
  }
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#CBD8E6;border-radius:999px;border:3px solid transparent;background-clip:content-box}
  ::-webkit-scrollbar-thumb:hover{background:#AFC4DA;background-clip:content-box;border:3px solid transparent}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:768px){.container{padding:0 24px}}
  @media (min-width:1024px){.container{padding:0 32px}}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .18s ease-out;
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-card)}
  .nav-wrap{display:flex;align-items:center;gap:14px;height:64px}
  @media (max-width:1023px){.nav-wrap{height:56px}}

  .logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
    display:flex;align-items:center;justify-content:center;flex:0 0 auto;
    box-shadow:0 6px 14px rgba(15,111,206,.26);
  }
  .logo-text{font-size:16px;font-weight:700;letter-spacing:-.2px;color:var(--ink);white-space:nowrap}
  @media (max-width:420px){.logo-text{font-size:14px}}

  .nav-channels{display:none;align-items:center;gap:2px;margin-left:20px;flex:1 1 auto}
  @media (min-width:1024px){.nav-channels{display:flex}}
  .nav-link{
    position:relative;padding:8px 12px;border-radius:8px;font-size:15px;color:var(--muted);
    transition:color .18s ease-out,background-color .18s ease-out;
  }
  @media (hover:hover){.nav-link:hover{color:var(--brand);background:var(--brand-soft)}}
  .nav-link:active{background:#D9E9FB}
  .nav-link.is-active{color:var(--brand);font-weight:600}
  .nav-link.is-active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
    border-radius:2px;background:var(--brand);
  }

  .nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
  .nav-search{
    display:none;align-items:center;gap:8px;height:40px;width:220px;padding:0 14px;
    border:1px solid var(--line);border-radius:999px;background:var(--page);
    transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;
  }
  @media (min-width:1024px){.nav-search{display:flex}}
  .nav-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(15,111,206,.14)}
  .nav-search svg{flex:0 0 auto;color:var(--faint)}
  .nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink)}

  .nav-text-btn{
    display:none;padding:8px 10px;font-size:15px;color:var(--muted);border-radius:8px;
    transition:color .18s ease-out,background-color .18s ease-out;
  }
  @media (min-width:1024px){.nav-text-btn{display:inline-flex}}
  @media (hover:hover){.nav-text-btn:hover{color:var(--brand);background:var(--brand-soft)}}

  .nav-cta{display:none}
  @media (min-width:768px){.nav-cta{display:inline-flex}}

  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
    border:1px solid var(--line);border-radius:var(--radius-ctrl);background:#fff;color:var(--ink);
    cursor:pointer;transition:border-color .18s ease-out,background-color .18s ease-out;
  }
  @media (min-width:1024px){.nav-toggle{display:none}}
  @media (hover:hover){.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}}

  /* 抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(15,31,51,.42);z-index:70;
    opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:360px;z-index:80;background:#fff;
    transform:translateX(100%);transition:transform .24s ease-out;
    display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
  .drawer-close{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
    display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);
  }
  .drawer-links{display:grid;gap:4px;margin-bottom:20px}
  .drawer-links a{
    padding:12px 12px;border-radius:10px;font-size:15px;color:var(--muted);
    display:flex;align-items:center;justify-content:space-between;
  }
  .drawer-links a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
  .drawer-search{
    display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;margin-bottom:18px;
    border:1px solid var(--line);border-radius:var(--radius-ctrl);background:var(--page);
  }
  .drawer-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px}
  .drawer-actions{display:grid;gap:10px;margin-top:auto}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:40px;padding:0 18px;border-radius:var(--radius-ctrl);border:1px solid transparent;
    font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
    transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-cta)}
  @media (hover:hover){.btn-accent:hover{background:var(--accent-hover)}}
  .btn-accent:active{background:#DE5620}
  .btn-ghost{background:#fff;color:var(--brand);border-color:#C7DDF5}
  @media (hover:hover){.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}}
  .btn-ghost:active{background:#D9E9FB}
  .btn-brand{background:var(--brand);color:#fff}
  @media (hover:hover){.btn-brand:hover{background:var(--brand-hover)}}
  .btn-brand:active{background:#0A4E96}
  .btn-lg{height:48px;padding:0 24px;font-size:16px}
  .btn-sm{height:36px;padding:0 14px;font-size:14px}
  .btn-block{width:100%}

  /* ---------- Hero ---------- */
  .hero{
    position:relative;overflow:hidden;padding:48px 0 40px;
    background:linear-gradient(135deg,rgba(15,111,206,.06),rgba(15,111,206,0) 62%),var(--page);
  }
  @media (min-width:1024px){.hero{padding:72px 0 56px}}
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
    background-image:radial-gradient(rgba(15,111,206,.9) 1px,transparent 1px);
    background-size:24px 24px;
  }
  .hero-grid{position:relative;display:grid;gap:32px;align-items:center}
  @media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px}}
  .pill{
    display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;
  }
  .pill-dot{width:6px;height:6px;border-radius:50%;background:var(--success);flex:0 0 auto}
  .hero h1{
    font-size:32px;line-height:1.2;font-weight:600;letter-spacing:-.5px;margin-top:18px;
  }
  @media (min-width:1024px){.hero h1{font-size:44px}}
  .hero-sub{font-size:16px;line-height:1.7;color:var(--muted);margin-top:16px;max-width:30em}
  @media (min-width:1024px){.hero-sub{font-size:19px}}
  .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;list-style:none}
  .hero-trust li{position:relative;padding-left:24px;font-size:14px;color:var(--muted);line-height:24px}
  .hero-trust li::before{
    content:"";position:absolute;left:0;top:4px;width:16px;height:16px;border-radius:50%;
    background:var(--brand-soft);border:1px solid #C7DDF5;
  }
  .hero-trust li::after{
    content:"";position:absolute;left:5px;top:8px;width:4px;height:7px;
    border-right:1.6px solid var(--brand);border-bottom:1.6px solid var(--brand);
    transform:rotate(42deg);
  }
  .hero-visual img{
    width:100%;height:300px;object-fit:cover;border-radius:20px;
    box-shadow:var(--shadow-card);border:1px solid var(--line);
  }
  @media (min-width:768px){.hero-visual img{height:380px}}
  @media (min-width:1024px){.hero-visual img{height:420px}}

  .stat-bar{
    position:relative;margin-top:40px;display:grid;grid-template-columns:repeat(2,1fr);
    gap:1px;background:var(--line);border:1px solid var(--line);
    border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  }
  @media (min-width:768px){.stat-bar{grid-template-columns:repeat(4,1fr);margin-top:56px}}
  .stat{background:#fff;padding:20px 18px}
  .stat strong{display:block;font-size:24px;font-weight:700;color:var(--brand);line-height:1.2}
  @media (min-width:1024px){.stat strong{font-size:28px}}
  .stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px}

  /* ---------- 板块 ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-white{background:#fff}
  .section-head{max-width:740px;margin-bottom:32px}
  .section-head .eyebrow{
    display:inline-block;font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.06em;
  }
  .section-head h2{font-size:26px;font-weight:600;line-height:1.3;letter-spacing:-.3px;margin-top:10px}
  @media (min-width:1024px){.section-head h2{font-size:32px}}
  .section-head p{margin-top:12px;color:var(--muted)}
  .section-head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}

  /* 功能分组 */
  .feature-stack{display:grid;gap:56px}
  @media (min-width:1024px){.feature-stack{gap:80px}}
  .feature-split{display:grid;gap:24px;align-items:center}
  @media (min-width:1024px){
    .feature-split{grid-template-columns:1fr 1fr;gap:56px}
    .feature-split.reverse .feature-media{grid-column:1;grid-row:1}
    .feature-split.reverse .feature-copy{grid-column:2;grid-row:1}
  }
  .feature-index{
    display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
    border-radius:12px;background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:16px;
  }
  .feature-copy h3{font-size:19px;font-weight:600;margin-top:16px;line-height:1.4}
  @media (min-width:1024px){.feature-copy h3{font-size:21px}}
  .feature-copy > p{margin-top:10px;color:var(--muted);font-size:15px}
  .check-list{list-style:none;display:grid;gap:10px;margin-top:18px}
  .check-list li{position:relative;padding-left:28px;font-size:15px;color:var(--muted);line-height:26px}
  .check-list li::before{
    content:"";position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;
    background:var(--brand-soft);
  }
  .check-list li::after{
    content:"";position:absolute;left:6px;top:9px;width:4px;height:8px;
    border-right:1.8px solid var(--brand);border-bottom:1.8px solid var(--brand);
    transform:rotate(42deg);
  }
  .feature-media img{
    width:100%;height:240px;object-fit:cover;border-radius:var(--radius-card);
    border:1px solid var(--line);box-shadow:var(--shadow-card);
  }
  @media (min-width:768px){.feature-media img{height:300px}}
  @media (min-width:1024px){.feature-media img{height:340px}}

  /* 使用场景 */
  .scene-track{display:flex;gap:16px;overflow-x:auto;padding-bottom:14px;scroll-snap-type:x mandatory}
  @media (min-width:768px){
    .scene-track{display:grid;grid-template-columns:1fr 1fr;gap:24px;overflow:visible;padding-bottom:0}
    .scene-track > *:nth-child(2){margin-top:44px}
  }
  .scene-card{
    flex:0 0 84%;scroll-snap-align:start;background:#fff;border:1px solid var(--line);
    border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card);
    display:flex;flex-direction:column;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  @media (hover:hover){
    .scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.35)}
  }
  .scene-tag{
    display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
    background:var(--accent-soft);color:var(--accent-hover);font-size:12px;font-weight:600;
    align-self:flex-start;
  }
  .scene-card h3{font-size:18px;font-weight:600;margin-top:14px;line-height:1.45}
  .scene-card p{margin-top:10px;color:var(--muted);font-size:15px;flex:1 1 auto}
  .scene-link{
    margin-top:18px;display:inline-flex;align-items:center;gap:6px;
    color:var(--brand);font-size:14px;font-weight:600;
  }
  @media (hover:hover){.scene-card:hover .scene-link{color:var(--brand-hover)}}

  /* 案例 */
  .case-grid{display:grid;gap:20px}
  @media (min-width:1024px){
    .case-grid{grid-template-columns:1.25fr 1fr;gap:24px}
    .case-main{grid-row:span 2}
  }
  .case-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  @media (hover:hover){
    .case-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.35)}
  }
  .case-card img{width:100%;object-fit:cover;border-bottom:1px solid var(--line)}
  .case-main img{height:220px}
  .case-small img{height:140px}
  @media (min-width:1024px){.case-main img{height:300px}}
  .case-body{padding:22px;display:flex;flex-direction:column;flex:1 1 auto}
  .case-body h3{font-size:18px;font-weight:600;line-height:1.45}
  .case-body p{margin-top:10px;color:var(--muted);font-size:15px;flex:1 1 auto}
  .case-points{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
  .case-points span{font-size:13px;color:var(--muted)}
  .case-points strong{color:var(--brand);font-size:16px;font-weight:700;margin-right:4px}

  /* 方案 */
  .plan-grid{display:grid;gap:20px;align-items:start}
  @media (min-width:768px){.plan-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
  .plan{
    position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    padding:28px 22px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  .plan.is-featured{border-color:var(--brand);box-shadow:0 16px 40px rgba(15,111,206,.14)}
  @media (min-width:768px){.plan.is-featured{transform:scale(1.045);z-index:1}}
  @media (hover:hover){
    .plan:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
    .plan.is-featured:hover{transform:translateY(-2px) scale(1.045)}
  }
  .plan-badge{
    position:absolute;top:-12px;left:22px;padding:4px 12px;border-radius:999px;
    background:var(--accent);color:#fff;font-size:12px;font-weight:600;box-shadow:var(--shadow-cta);
  }
  .plan h3{font-size:18px;font-weight:600}
  .plan-desc{margin-top:8px;font-size:13px;color:var(--muted)}
  .plan-price{margin-top:18px;display:flex;align-items:flex-end;gap:6px}
  .plan-price strong{font-size:30px;font-weight:700;color:var(--ink);line-height:1;letter-spacing:-.5px}
  .plan-price span{font-size:13px;color:var(--faint);padding-bottom:2px}
  .plan-list{list-style:none;display:grid;gap:10px;margin:20px 0 24px}
  .plan-list li{position:relative;padding-left:24px;font-size:14px;color:var(--muted);line-height:24px}
  .plan-list li::before{
    content:"";position:absolute;left:0;top:6px;width:14px;height:14px;border-radius:50%;
    background:var(--brand-soft);
  }
  .plan-list li::after{
    content:"";position:absolute;left:4.5px;top:9px;width:4px;height:7px;
    border-right:1.6px solid var(--brand);border-bottom:1.6px solid var(--brand);
    transform:rotate(42deg);
  }
  .plan .btn{margin-top:auto}
  .plan-note{
    margin-top:24px;padding:16px 20px;border:1px solid var(--line);border-radius:var(--radius-card);
    background:#fff;font-size:14px;color:var(--muted);
  }

  /* 最新信息 */
  .post-grid{list-style:none;display:grid;gap:20px}
  @media (min-width:640px){.post-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr)}}
  .post-card{
    height:100%;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  @media (hover:hover){
    .post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.35)}
  }
  .post-card-link{display:flex;flex-direction:column;height:100%}
  .post-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,rgba(15,111,206,.08),rgba(15,111,206,.02));overflow:hidden}
  .post-cover img{width:100%;height:100%;object-fit:cover}
  .post-body{padding:20px;display:flex;flex-direction:column;flex:1 1 auto}
  .badge{
    display:inline-flex;align-items:center;align-self:flex-start;padding:3px 10px;border-radius:8px;
    background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;
  }
  .post-body h3{
    margin-top:12px;font-size:17px;font-weight:600;line-height:1.5;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-body p{
    margin-top:10px;color:var(--muted);font-size:14px;line-height:1.7;flex:1 1 auto;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-meta{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
    font-size:13px;color:var(--faint);
  }
  .post-meta .arrow{color:var(--brand);font-weight:600}
  .empty-state{
    background:#fff;border:1px dashed #CBD8E6;border-radius:var(--radius-card);
    padding:48px 24px;text-align:center;color:var(--muted);
  }
  .empty-state svg{margin:0 auto 14px;color:var(--faint)}
  .empty-state p{font-size:15px}
  .empty-state .btn{margin-top:18px}

  /* FAQ */
  .faq-list{border-top:1px solid var(--line);max-width:900px}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 2px;font-size:16px;font-weight:600;line-height:1.5;cursor:pointer;list-style:none;
    transition:color .18s ease-out;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary .chev{flex:0 0 auto;color:var(--faint);transition:transform .18s ease-out}
  @media (hover:hover){.faq-item summary:hover{color:var(--brand)}}
  .faq-item[open] summary{color:var(--brand)}
  .faq-item[open] summary .chev{transform:rotate(180deg)}
  .faq-body{
    margin:0 0 16px;padding:16px 20px;border-radius:var(--radius-ctrl);
    background:#F7FBFF;color:var(--muted);font-size:15px;line-height:1.75;
  }

  /* 底部 CTA */
  .cta-band{
    background:linear-gradient(135deg,rgba(15,111,206,.12),rgba(15,111,206,.04)),var(--brand-soft);
    border-radius:20px;padding:34px 28px;display:flex;flex-wrap:wrap;gap:20px;
    align-items:center;justify-content:space-between;
  }
  .cta-band h2{font-size:22px;font-weight:600;line-height:1.35}
  @media (min-width:1024px){.cta-band h2{font-size:26px}}
  .cta-band p{margin-top:8px;color:var(--muted);font-size:15px}

  /* 页脚 */
  .site-footer{background:var(--deep);color:#fff;padding:56px 0 26px;margin-top:8px}
  .footer-grid{display:grid;gap:32px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
  .footer-brand .logo-text{color:#fff}
  .footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:34em}
  .footer-brand .btn{margin-top:18px}
  .footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
  .footer-links{list-style:none;display:grid;gap:10px}
  .footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color .18s ease-out}
  @media (hover:hover){.footer-links a:hover{color:#fff}}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:13px;color:rgba(255,255,255,.52);
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    html{scroll-behavior:auto}
  }

/* roulang page: article */
:root{
  --brand:#0F6FCE;
  --brand-hover:#0C5CAF;
  --brand-soft:#E8F2FD;
  --accent:#FF7A45;
  --accent-hover:#F1632C;
  --accent-soft:#FFF1EB;
  --success:#12B886;
  --warn:#E5484D;
  --ink:#0F1F33;
  --muted:#5B6E84;
  --faint:#8A9AAC;
  --line:#E2E9F2;
  --page:#F4F7FB;
  --surf:#FFFFFF;
  --deep:#102A43;
  --r-card:16px;
  --r-img:12px;
  --r-ctrl:10px;
  --sh-card:0 1px 2px rgba(15,31,51,.04), 0 8px 24px rgba(15,31,51,.06);
  --sh-hover:0 12px 32px rgba(15,31,51,.10);
  --sh-cta:0 8px 20px rgba(255,122,69,.28);
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3}
ul,ol{margin:0}
::selection{background:rgba(15,111,206,.16)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#CBD6E3;border-radius:999px;border:2px solid var(--page)}
::-webkit-scrollbar-track{background:transparent}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow var(--ease)}
.site-header.is-scrolled{box-shadow:var(--sh-card)}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
@media (max-width:1023px){.header-inner{height:56px;gap:12px}}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink)}
.logo-mark{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,#0F6FCE,#3E93DF);color:#fff;display:grid;place-items:center;flex:0 0 auto}
.logo-text{font-size:17px;font-weight:600;letter-spacing:.2px;white-space:nowrap}
@media (max-width:520px){.logo-text{font-size:15px}}
.nav-channels{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{position:relative;padding:8px 12px;font-size:15px;color:var(--muted);border-radius:8px;transition:color var(--ease),background-color var(--ease)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--brand)}
@media (hover:hover){.nav-link:hover{color:var(--ink);background:var(--brand-soft)}}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search .search-icon{position:absolute;left:12px;color:var(--faint);pointer-events:none}
.nav-search input{height:40px;width:232px;padding:0 16px 0 36px;border-radius:999px;border:1px solid var(--line);background:#F8FAFD;color:var(--ink);font-size:14px;transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease)}
.nav-search input::placeholder{color:var(--faint)}
.nav-search input:focus{outline:none;background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,206,.14)}
.nav-login{padding:9px 12px;font-size:15px;color:var(--muted);border-radius:8px;transition:color var(--ease),background-color var(--ease)}
@media (hover:hover){.nav-login:hover{color:var(--brand);background:var(--brand-soft)}}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--ink);cursor:pointer}
@media (max-width:1023px){
  .nav-channels{display:none}
  .nav-search{display:none}
  .nav-login{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:520px){
  .header-actions .btn-accent{height:38px;padding:0 12px;font-size:14px}
}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-ctrl);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-cta)}
@media (hover:hover){.btn-accent:hover{background:var(--accent-hover);transform:translateY(-1px)}}
.btn-accent:active{background:#DE5620;transform:none}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
@media (hover:hover){.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}}
.btn-outline:active{transform:none;background:var(--brand-soft)}
.btn-soft{background:var(--brand-soft);color:var(--brand-hover)}
@media (hover:hover){.btn-soft:hover{background:#D7E9FB}}
.btn-sm{height:38px;padding:0 14px;font-size:14px}
.btn:disabled{opacity:.45;pointer-events:none}
.btn svg{flex:0 0 auto}

/* ---------- 抽屉 ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(15,31,51,.42);z-index:70;opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease)}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;z-index:80;width:84vw;max-width:360px;height:100%;background:#fff;padding:18px;overflow-y:auto;transform:translateX(103%);transition:transform 220ms ease-out;box-shadow:-12px 0 40px rgba(15,31,51,.16)}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--muted);cursor:pointer}
.drawer-nav{padding:14px 0;display:grid;gap:4px}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;padding:13px 12px;border-radius:10px;font-size:16px;color:var(--ink);transition:background-color var(--ease),color var(--ease)}
@media (hover:hover){.drawer-nav a:hover{background:var(--brand-soft);color:var(--brand-hover)}}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;background:var(--brand-soft)}
.drawer-form{padding-top:14px;border-top:1px solid var(--line)}
.drawer-form input{width:100%;height:44px;padding:0 14px;border-radius:var(--r-ctrl);border:1px solid var(--line);background:#F8FAFD;font-size:15px}
.drawer-form input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(15,111,206,.14)}
.drawer-actions{display:grid;gap:10px;margin-top:16px}
body.is-locked{overflow:hidden}

/* ---------- 主区 ---------- */
.page-main{padding:24px 0 0}
@media (min-width:768px){.page-main{padding:32px 0 0}}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:18px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;list-style:none;margin:0;padding:0;font-size:13px;color:var(--faint);gap:6px}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px;min-width:0}
.breadcrumb li+li::before{content:"›";color:var(--faint);margin-right:2px}
.breadcrumb a{color:var(--muted);transition:color var(--ease)}
@media (hover:hover){.breadcrumb a:hover{color:var(--brand)}}
.breadcrumb .is-current{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--faint)}
@media (max-width:520px){.breadcrumb .is-current{max-width:150px}}

/* ---------- 文章布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:28px}
@media (min-width:1024px){.article-layout{grid-template-columns:minmax(0,1fr) 268px;gap:44px}}
.article-shell{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:20px}
@media (min-width:768px){.article-shell{padding:32px}}
@media (min-width:1024px){.article-shell{padding:40px 44px 44px}}

.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 11px;border-radius:999px;background:var(--brand-soft);color:var(--brand-hover);font-size:12.5px;font-weight:600}
.article-title{font-size:28px;line-height:1.32;letter-spacing:-.2px;margin:14px 0 16px;color:var(--ink)}
@media (min-width:1024px){.article-title{font-size:36px}}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;padding:0 0 22px;margin:0 0 26px;border-bottom:1px solid var(--line);font-size:13px;color:var(--faint)}
.article-meta li{display:inline-flex;align-items:center;gap:6px}
.article-meta svg{color:var(--faint)}

/* ---------- 正文排版 ---------- */
.article-body{max-width:820px;font-size:16.5px;line-height:1.85;color:#20344A}
@media (min-width:1024px){.article-body{font-size:17px}}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:21px;line-height:1.45;margin:40px 0 14px;padding-left:12px;border-left:4px solid var(--brand);color:var(--ink)}
@media (min-width:1024px){.article-body h2{font-size:24px}}
.article-body h3{font-size:18px;margin:28px 0 10px;color:var(--ink)}
@media (min-width:1024px){.article-body h3{font-size:19px}}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.2em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body ul li::marker{color:var(--brand)}
.article-body ol li::marker{color:var(--brand);font-weight:600}
.article-body strong{font-weight:600;color:var(--ink)}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
@media (hover:hover){.article-body a:hover{color:var(--brand-hover)}}
.article-body blockquote{margin:0 0 1.3em;padding:16px 18px;background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;color:#22405F}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:0 auto 10px}
.article-body figure{margin:0 0 1.4em}
.article-body figcaption{font-size:13px;color:var(--faint);text-align:center;line-height:1.7}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15px;background:#fff}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body thead th{background:var(--brand-soft);color:#17456F;font-weight:600}
.article-body tbody tr:nth-child(even){background:#F7FAFD}
.article-body pre{margin:0 0 1.4em;padding:16px;background:#F5F8FC;border:1px solid var(--line);border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.65}
.article-body code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.94em}
.article-body hr{border:none;border-top:1px solid var(--line);margin:34px 0}

.empty-state{padding:48px 20px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);background:#FBFDFF}
.empty-state svg{color:var(--brand);margin:0 auto 14px}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--muted);font-size:15px;margin:0 0 20px}

/* ---------- 侧栏 ---------- */
.aside{display:none}
@media (min-width:1024px){.aside{display:block}}
.aside-inner{position:sticky;top:88px;display:grid;gap:16px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:20px}
.aside-title{font-size:15px;font-weight:600;margin:0 0 12px;display:flex;align-items:center;gap:8px;color:var(--ink)}
.aside-title::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand)}
.aside-list{list-style:none;padding:0;display:grid;gap:10px;font-size:14px;color:var(--muted);line-height:1.7}
.aside-list li{display:flex;gap:8px;align-items:flex-start}
.aside-list svg{flex:0 0 auto;margin-top:4px;color:var(--success)}
.aside-links{list-style:none;padding:0;display:grid;gap:8px;font-size:14px}
.aside-links a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;color:var(--ink);transition:border-color var(--ease),background-color var(--ease),color var(--ease)}
@media (hover:hover){.aside-links a:hover{border-color:rgba(15,111,206,.35);background:var(--brand-soft);color:var(--brand-hover)}}

/* ---------- 相关推荐 ---------- */
.section{padding:56px 0 0}
@media (min-width:1024px){.section{padding:72px 0 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.section-title{font-size:24px;letter-spacing:-.2px}
@media (min-width:1024px){.section-title{font-size:28px}}
.section-sub{margin:8px 0 0;color:var(--muted);font-size:15px;line-height:1.7}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:15px;font-weight:600;transition:color var(--ease),gap var(--ease)}
@media (hover:hover){.text-link:hover{color:var(--brand-hover);gap:10px}}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;list-style:none;padding:0;margin:0}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);height:100%;display:flex;flex-direction:column}
@media (hover:hover){.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:rgba(15,111,206,.2)}}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;background:linear-gradient(135deg,#E8F2FD,#F4F7FB)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:18px;line-height:1.45;color:var(--ink)}
.card-text{font-size:14.5px;line-height:1.75;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--faint)}

.related-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* ---------- CTA 带 ---------- */
.cta-band{margin-top:56px;background:var(--brand-soft);border-radius:var(--r-card);padding:26px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
@media (min-width:768px){.cta-band{padding:30px 32px}}
.cta-band h2{font-size:20px;margin:0 0 6px;color:#12456F}
.cta-band p{margin:0;font-size:14.5px;color:#3A6489;line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#fff;margin-top:72px;padding:56px 0 22px}
@media (min-width:1024px){.site-footer{padding:64px 0 26px}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}}
.footer-logo{color:#fff}
.footer-desc{color:rgba(255,255,255,.72);font-size:14px;line-height:1.8;margin:14px 0 18px;max-width:330px}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin:0 0 14px}
.footer-links{list-style:none;padding:0;display:grid;gap:10px;font-size:14px}
.footer-links a{color:rgba(255,255,255,.74);transition:color var(--ease)}
@media (hover:hover){.footer-links a:hover{color:#fff}}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);line-height:1.7}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .card:hover,.btn:hover{transform:none !important}
}

/* roulang page: category1 */
:root{
    --brand:#0F6FCE;
    --brand-hover:#0C5CAF;
    --brand-soft:#E8F2FD;
    --accent:#FF7A45;
    --accent-hover:#F1632C;
    --accent-soft:#FFF1EB;
    --success:#12B886;
    --warn:#E5484D;
    --ink:#0F1F33;
    --muted:#5B6E84;
    --faint:#8A9AAC;
    --line:#E2E9F2;
    --page:#F4F7FB;
    --surf:#FFFFFF;
    --deep:#102A43;
    --radius-card:16px;
    --radius-img:14px;
    --radius-ctrl:10px;
    --shadow-card:0 1px 2px rgba(15,31,51,.04), 0 8px 24px rgba(15,31,51,.06);
    --shadow-hover:0 12px 32px rgba(15,31,51,.10);
    --shadow-cta:0 8px 20px rgba(255,122,69,.28);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--page);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",Inter,system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  body.no-scroll{overflow:hidden}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul,ol{padding:0;list-style:none}
  ::selection{background:rgba(15,111,206,.16);color:var(--ink)}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:768px){.container{padding:0 24px}}
  @media (min-width:1024px){.container{padding:0 32px}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border:1px solid transparent;
    border-radius:var(--radius-ctrl);font-size:15px;font-weight:600;
    cursor:pointer;white-space:nowrap;
    transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
  }
  .btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-cta)}
  .btn-primary{background:var(--brand);color:#fff}
  .btn-ghost{background:#fff;color:var(--brand);border-color:rgba(15,111,206,.35)}
  .btn-line{background:#fff;color:var(--ink);border-color:var(--line)}
  .btn-sm{height:38px;padding:0 14px;font-size:14px}
  @media (hover:hover){
    .btn-accent:hover{background:var(--accent-hover)}
    .btn-primary:hover{background:var(--brand-hover)}
    .btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
    .btn-line:hover{border-color:var(--brand);color:var(--brand)}
    .btn:hover{transform:translateY(-1px)}
  }
  .btn:active{transform:translateY(0);filter:brightness(.96)}
  .btn[disabled]{opacity:.45;pointer-events:none}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease-out;
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-card)}
  .nav-inner{display:flex;align-items:center;gap:20px;height:64px}
  .logo{display:inline-flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:var(--ink);white-space:nowrap}
  .logo-mark{
    width:32px;height:32px;flex:0 0 auto;border-radius:10px;
    background:var(--brand-soft);color:var(--brand);
    display:inline-flex;align-items:center;justify-content:center;
  }
  .logo-text{letter-spacing:.2px}

  .nav-channels{display:flex;align-items:center;gap:2px;margin-left:6px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:38px;
    padding:0 12px;border-radius:var(--radius-ctrl);
    font-size:15px;color:var(--muted);
    transition:color .18s ease-out,background-color .18s ease-out;
  }
  .nav-link.is-active{color:var(--brand);font-weight:600}
  .nav-link.is-active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
    border-radius:2px;background:var(--brand);
  }
  @media (hover:hover){
    .nav-link:hover{color:var(--brand);background:var(--brand-soft)}
  }

  .nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
  .search-box{position:relative;display:flex;align-items:center}
  .search-box svg{position:absolute;left:13px;color:var(--faint);pointer-events:none}
  .search-box input{
    width:220px;height:40px;padding:0 14px 0 38px;
    border:1px solid var(--line);border-radius:999px;background:#fff;
    font-size:14px;color:var(--ink);
    transition:border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .search-box input::placeholder{color:var(--faint)}
  .search-box input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,206,.14)}

  .nav-toggle{
    display:none;width:44px;height:44px;align-items:center;justify-content:center;
    border:1px solid var(--line);border-radius:var(--radius-ctrl);background:#fff;color:var(--ink);
    cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out;
  }
  @media (hover:hover){.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}}

  /* 移动端抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(15,31,51,.45);
    opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;z-index:60;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:360px;
    background:#fff;z-index:70;padding:20px;overflow-y:auto;
    transform:translateX(102%);transition:transform .22s ease-out;
    display:flex;flex-direction:column;gap:18px;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
  .drawer-close{
    width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-ctrl);
    background:#fff;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  }
  .drawer-links{display:flex;flex-direction:column;gap:4px}
  .drawer-links .nav-link{height:46px;justify-content:flex-start;width:100%}
  .drawer-links .nav-link.is-active::after{display:none}
  .drawer-actions{display:flex;flex-direction:column;gap:10px}
  .drawer .search-box input{width:100%}

  @media (max-width:1023px){
    .nav-channels{display:none}
    .search-box.nav-search{display:none}
    .nav-login{display:none}
    .nav-toggle{display:inline-flex}
    .nav-inner{height:56px;gap:12px}
  }
  @media (max-width:639px){
    .nav-cta{padding:0 12px;font-size:14px;height:40px}
    .logo-text{font-size:15px}
  }

  /* ---------- 页面横幅 ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    background-image:
      radial-gradient(rgba(15,111,206,.04) 1px, transparent 1px),
      linear-gradient(135deg, rgba(244,247,251,.95), rgba(232,242,253,.88)),
      url('/assets/images/backpic/back-1.png');
    background-size:18px 18px, cover, cover;
    background-position:0 0, center, center;
    border-bottom:1px solid var(--line);
  }
  .page-hero-inner{padding:40px 0 48px}
  @media (min-width:1024px){.page-hero-inner{padding:56px 0 64px}}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--faint);flex-wrap:wrap}
  .breadcrumb a{color:var(--muted)}
  @media (hover:hover){.breadcrumb a:hover{color:var(--brand)}}
  .breadcrumb .sep{color:var(--faint)}
  .breadcrumb .current{color:var(--ink);font-weight:600}

  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    height:30px;padding:0 14px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:600;
  }
  .page-hero h1{
    margin-top:18px;
    font-size:32px;font-weight:600;line-height:1.25;letter-spacing:.2px;
    max-width:820px;
  }
  @media (min-width:1024px){.page-hero h1{font-size:44px;line-height:1.2}}
  .hero-sub{
    margin-top:16px;max-width:760px;
    font-size:16px;line-height:1.75;color:var(--muted);
  }
  @media (min-width:1024px){.hero-sub{font-size:19px}}
  .hero-anchors{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .hero-anchors a{
    display:inline-flex;align-items:center;gap:6px;
    height:38px;padding:0 16px;border-radius:999px;
    background:#fff;border:1px solid var(--line);
    font-size:14px;color:var(--muted);
    transition:border-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out;
  }
  @media (hover:hover){
    .hero-anchors a:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-card)}
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{max-width:760px;margin-bottom:32px}
  .section-head h2{font-size:26px;font-weight:600;line-height:1.3}
  @media (min-width:1024px){.section-head h2{font-size:32px}}
  .section-head p{margin-top:14px;color:var(--muted);font-size:16px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;color:var(--brand);
    letter-spacing:.4px;margin-bottom:10px;
  }
  .eyebrow::before{content:"";width:16px;height:2px;border-radius:2px;background:var(--brand)}
  section[id]{scroll-margin-top:84px}

  /* ---------- 左文右图 / 右文左图 ---------- */
  .split{display:grid;gap:28px;align-items:center}
  @media (min-width:1024px){
    .split{grid-template-columns:7fr 5fr;gap:48px}
    .split.reverse{grid-template-columns:5fr 7fr}
    .split.reverse .split-media{order:-1}
  }
  .split-media{
    border-radius:var(--radius-img);overflow:hidden;
    border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-card);
  }
  .split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
  .lead-text{color:var(--muted);font-size:16px;line-height:1.8}

  .check-list{margin-top:22px;display:flex;flex-direction:column;gap:14px}
  .check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--ink);line-height:1.7}
  .check-icon{
    flex:0 0 auto;width:24px;height:24px;margin-top:3px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    display:inline-flex;align-items:center;justify-content:center;
  }

  /* ---------- 编号准备卡 ---------- */
  .prep-list{display:flex;flex-direction:column;gap:16px;margin-top:24px}
  .prep-item{
    display:flex;gap:16px;padding:20px;background:#fff;
    border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    transition:box-shadow .18s ease-out,transform .18s ease-out,border-color .18s ease-out;
  }
  @media (hover:hover){
    .prep-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.2)}
  }
  .prep-no{
    font-size:15px;font-weight:600;color:var(--brand);
    font-variant-numeric:tabular-nums;
    width:38px;height:38px;flex:0 0 auto;border-radius:12px;
    background:var(--brand-soft);display:inline-flex;align-items:center;justify-content:center;
  }
  .prep-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
  .prep-item p{font-size:15px;color:var(--muted);line-height:1.7}

  /* ---------- 竖线文字卡 ---------- */
  .line-cards{display:grid;gap:16px;margin-top:8px}
  @media (min-width:640px){.line-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
  .line-card{
    position:relative;background:#fff;border:1px solid var(--line);
    border-radius:var(--radius-card);padding:20px 20px 20px 26px;
    box-shadow:var(--shadow-card);
    transition:box-shadow .18s ease-out,transform .18s ease-out,border-color .18s ease-out;
  }
  .line-card::before{
    content:"";position:absolute;left:12px;top:20px;bottom:20px;width:4px;border-radius:4px;background:var(--brand);
  }
  @media (hover:hover){
    .line-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.2)}
  }
  .line-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
  .line-card p{font-size:15px;color:var(--muted);line-height:1.72}

  /* ---------- 行式对比条 ---------- */
  .compare-rows{border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;overflow:hidden;box-shadow:var(--shadow-card)}
  .compare-row{display:grid;gap:8px;padding:20px 22px;border-top:1px solid var(--line)}
  .compare-row:first-child{border-top:none}
  @media (min-width:900px){
    .compare-row{grid-template-columns:200px 1fr;align-items:center;gap:24px}
  }
  .compare-tag{
    display:inline-flex;align-items:center;gap:8px;
    font-size:14px;font-weight:600;color:var(--brand);
  }
  .compare-tag span{
    width:28px;height:28px;border-radius:9px;background:var(--brand-soft);
    display:inline-flex;align-items:center;justify-content:center;font-size:12px;
  }
  .compare-row p{font-size:15.5px;color:var(--muted);line-height:1.75}

  /* ---------- 数据条 ---------- */
  .metric-strip{
    display:grid;gap:16px;margin-top:8px;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    padding:24px;box-shadow:var(--shadow-card);
  }
  @media (min-width:768px){.metric-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;padding:28px 32px}}
  .metric{border-top:2px solid var(--brand-soft);padding-top:16px}
  @media (min-width:768px){.metric{border-top:none;border-left:2px solid var(--brand-soft);padding:4px 0 4px 20px}}
  .metric:first-child{border-left:none;padding-left:0}
  .metric strong{
    display:block;font-size:30px;font-weight:600;color:var(--brand);
    font-variant-numeric:tabular-nums;line-height:1.2;
  }
  .metric span{display:block;margin-top:6px;font-size:15px;color:var(--muted);line-height:1.7}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:820px}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:first-child{border-top:1px solid var(--line)}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:18px 0;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-arrow{flex:0 0 auto;color:var(--brand);transition:transform .18s ease-out}
  .faq-item[open] .faq-arrow{transform:rotate(180deg)}
  .faq-body{
    background:#F7FBFF;border:1px solid var(--line);border-radius:12px;
    padding:16px 20px;margin:0 0 18px;
    font-size:15.5px;color:var(--muted);line-height:1.78;
  }
  @media (hover:hover){.faq-item summary:hover{color:var(--brand)}}

  /* ---------- CTA 带 ---------- */
  .cta-band{
    background:var(--brand-soft);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  }
  .cta-inner{
    display:flex;flex-direction:column;gap:18px;align-items:flex-start;
    padding:32px 0;
  }
  @media (min-width:900px){
    .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:38px 0}
  }
  .cta-inner h2{font-size:22px;font-weight:600}
  @media (min-width:1024px){.cta-inner h2{font-size:26px}}
  .cta-inner p{margin-top:8px;color:var(--muted);font-size:15.5px;max-width:640px}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--deep);color:rgba(255,255,255,.82)}
  .footer-grid{display:grid;gap:32px;padding:48px 0 36px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:60px 0 44px}}
  .footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
  .footer-logo{color:#fff}
  .footer-logo .logo-mark{background:rgba(255,255,255,.12);color:#fff}
  .footer-desc{font-size:14.5px;color:rgba(255,255,255,.66);line-height:1.75;max-width:340px}
  .footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-links a{font-size:14.5px;color:rgba(255,255,255,.7);transition:color .18s ease-out}
  @media (hover:hover){.footer-links a:hover{color:#fff}}
  .footer-bottom{
    display:flex;flex-direction:column;gap:8px;
    padding:18px 0 28px;border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:rgba(255,255,255,.55);
  }
  @media (min-width:900px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important}
    html{scroll-behavior:auto}
  }

/* roulang page: category2 */
:root{
  --brand:#0F6FCE;
  --brand-hover:#0C5CAF;
  --brand-soft:#E8F2FD;
  --accent:#FF7A45;
  --accent-hover:#F1632C;
  --accent-soft:#FFF1EB;
  --success:#12B886;
  --warn:#E5484D;
  --ink:#0F1F33;
  --muted:#5B6E84;
  --faint:#8A9AAC;
  --line:#E2E9F2;
  --page:#F4F7FB;
  --surf:#FFFFFF;
  --deep:#102A43;
  --r-card:16px;
  --r-ctrl:10px;
  --sh-card:0 1px 2px rgba(15,31,51,.04), 0 8px 24px rgba(15,31,51,.06);
  --sh-hover:0 12px 32px rgba(15,31,51,.10);
  --sh-cta:0 8px 20px rgba(255,122,69,.28);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'PingFang SC','HarmonyOS Sans','Noto Sans SC','Microsoft YaHei','Inter',system-ui,sans-serif;
  background:var(--page);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:var(--brand-soft);color:var(--brand-hover);}
*::-webkit-scrollbar{width:10px;height:10px;}
*::-webkit-scrollbar-thumb{background:#CFDCEA;border-radius:999px;border:3px solid transparent;background-clip:content-box;}
*::-webkit-scrollbar-thumb:hover{background:#B4C7DB;background-clip:content-box;}
*::-webkit-scrollbar-track{background:transparent;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right: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 .18s ease-out;}
.site-header.is-scrolled{box-shadow:var(--sh-card);}
.header-inner{display:flex;align-items:center;gap:14px;height:56px;}
@media (min-width:1024px){.header-inner{height:64px;gap:20px;}}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:32px;height:32px;border-radius:10px;background:var(--brand-soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;flex:none;}
.logo-text{font-size:16px;font-weight:600;letter-spacing:.2px;white-space:nowrap;}
@media (max-width:520px){.logo-text{font-size:14px;letter-spacing:0;}}
.nav-channels{display:none;}
@media (min-width:1024px){.nav-channels{display:flex;align-items:center;gap:2px;margin-left:6px;}}
.nav-link{position:relative;display:inline-flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-ctrl);font-size:15px;color:var(--muted);transition:color .18s ease-out,background-color .18s ease-out;}
@media (hover:hover){.nav-link:hover{color:var(--brand);background:var(--brand-soft);}}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--brand);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px;}
.search-box{display:none;align-items:center;gap:8px;height:40px;padding:0 14px;background:#fff;border:1px solid var(--line);border-radius:999px;transition:border-color .18s ease-out,box-shadow .18s ease-out;}
@media (min-width:1024px){.search-box{display:flex;width:228px;}}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);}
.search-box svg{color:var(--faint);flex:none;}
.search-box input{width:100%;border:0;outline:0;background:transparent;font-size:14px;}
.search-box input::placeholder{color:var(--faint);}
.search-box.is-block{display:flex;width:100%;}
.btn-text{display:none;align-items:center;height:40px;padding:0 12px;border-radius:var(--r-ctrl);font-size:15px;color:var(--muted);transition:color .18s ease-out,background-color .18s ease-out;}
@media (min-width:1024px){.btn-text{display:inline-flex;}}
@media (hover:hover){.btn-text:hover{color:var(--brand);background:var(--brand-soft);}}
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-ctrl);background:#fff;border:1px solid var(--line);cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out;}
@media (hover:hover){.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}}
@media (min-width:1024px){.menu-toggle{display:none;}}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-ctrl);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-cta);}
@media (hover:hover){.btn-accent:hover{background:var(--accent-hover);}}
.btn-accent:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
@media (hover:hover){.btn-ghost:hover{background:var(--brand-soft);}}
.btn-ghost:active{transform:translateY(1px);}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:90;pointer-events:none;}
.drawer-backdrop{position:absolute;inset:0;background:rgba(15,31,51,.42);opacity:0;transition:opacity .22s ease-out;}
.drawer-inner{position:absolute;top:0;right:0;width:min(86vw,380px);height:100%;background:#fff;box-shadow:-12px 0 32px rgba(15,31,51,.12);transform:translateX(100%);transition:transform .22s ease-out;display:flex;flex-direction:column;gap:18px;padding:18px 20px 28px;overflow-y:auto;}
.drawer.is-open{pointer-events:auto;}
.drawer.is-open .drawer-backdrop{opacity:1;}
.drawer.is-open .drawer-inner{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{width:44px;height:44px;border-radius:var(--r-ctrl);border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);}
.drawer-nav{display:grid;gap:8px;}
.drawer-nav .nav-link{width:100%;justify-content:flex-start;padding:12px 14px;background:#F7FAFD;border:1px solid var(--line);}
.drawer-nav .nav-link.is-active{background:var(--brand-soft);border-color:rgba(15,111,206,.24);}
.drawer-nav .nav-link.is-active::after{display:none;}
.drawer-actions{display:grid;gap:10px;margin-top:auto;}

/* ---------- 页面横幅 ---------- */
.page-hero{position:relative;overflow:hidden;background-image:linear-gradient(135deg,rgba(15,111,206,.06),rgba(255,255,255,0));border-bottom:1px solid var(--line);}
.page-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.16;}
.page-hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(15,111,206,.35) 1px,transparent 1px);background-size:26px 26px;opacity:.05;}
.hero-banner{position:relative;z-index:1;padding:36px 0 44px;}
@media (min-width:1024px){.hero-banner{padding:64px 0 68px;}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--muted);}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px;}
.breadcrumb li+li::before{content:"›";color:var(--faint);}
.breadcrumb a{color:var(--muted);transition:color .18s ease-out;}
@media (hover:hover){.breadcrumb a:hover{color:var(--brand);}}
.breadcrumb .current{color:var(--ink);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-top:20px;padding:5px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;}
.banner-title{margin:16px 0 14px;font-size:32px;line-height:1.2;font-weight:600;max-width:860px;letter-spacing:.2px;}
@media (min-width:1024px){.banner-title{font-size:44px;}}
.banner-lead{margin:0;max-width:780px;font-size:16px;line-height:1.7;color:var(--muted);}
@media (min-width:1024px){.banner-lead{font-size:19px;}}
.anchor-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.anchor-nav a{display:inline-flex;align-items:center;height:40px;padding:0 16px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);font-size:14px;transition:color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;}
@media (hover:hover){.anchor-nav a:hover{color:var(--brand);border-color:var(--brand);box-shadow:var(--sh-card);}}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:96px 0;}}
.section-tight{padding:48px 0;}
@media (min-width:1024px){.section-tight{padding:72px 0;}}
.section-head{max-width:780px;margin-bottom:30px;}
.section-head h2{margin:12px 0 12px;font-size:26px;line-height:1.25;font-weight:600;}
@media (min-width:1024px){.section-head h2{font-size:32px;}}
.section-head p{color:var(--muted);font-size:16px;}
.label-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;}

/* ---------- 对照表 ---------- */
.spec-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;}
.spec-scroll{overflow-x:auto;}
.spec-table{width:100%;min-width:680px;border-collapse:collapse;text-align:left;}
.spec-table th,.spec-table td{padding:16px 20px;border-bottom:1px solid var(--line);font-size:15px;vertical-align:top;}
.spec-table thead th{background:#F7FAFD;color:var(--muted);font-size:13px;font-weight:600;white-space:nowrap;}
.spec-table tbody tr:last-child td{border-bottom:0;}
.spec-table tbody tr{transition:background-color .18s ease-out;}
@media (hover:hover){.spec-table tbody tr:hover{background:#F7FBFF;}}
.spec-table tbody tr.is-key{background:#F7FBFF;}
.cell-strong{display:block;font-weight:600;color:var(--ink);margin-bottom:2px;}
.cell-hint{display:block;font-size:13px;color:var(--faint);}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;}
.tag-brand{background:var(--brand-soft);color:var(--brand);}
.tag-accent{background:var(--accent-soft);color:var(--accent-hover);}
.tag-safe{background:rgba(18,184,134,.12);color:#0E9470;}
.spec-note{margin-top:14px;font-size:13px;color:var(--faint);}

/* ---------- 图文卡网格 ---------- */
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:760px){.card-grid{grid-template-columns:repeat(2,1fr);gap:24px;}}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
@media (hover:hover){.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:rgba(15,111,206,.2);}}
.card-media{width:100%;aspect-ratio:16/9;object-fit:cover;background:linear-gradient(135deg,var(--brand-soft),#F7FBFF);}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px 22px 22px;flex:1;}
.card-body h3{font-size:18px;font-weight:600;line-height:1.45;}
.card-body p{color:var(--muted);font-size:15px;}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--faint);}
.card-meta .arrow{color:var(--brand);display:inline-flex;transition:transform .18s ease-out;}
@media (hover:hover){.card:hover .card-meta .arrow{transform:translateX(2px);}}

/* ---------- 核对清单 ---------- */
.check-list{display:grid;gap:14px;}
.check-list li{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:16px 20px;box-shadow:var(--sh-card);}
.check-list strong{display:block;font-size:17px;font-weight:600;margin-bottom:4px;}
.check-list span{color:var(--muted);font-size:15px;}

/* ---------- FAQ ---------- */
.faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;}
.faq-item+.faq-item{border-top:1px solid var(--line);}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;padding:18px 22px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .chev{flex:none;color:var(--brand);transition:transform .18s ease-out;}
.faq-item[open] summary{color:var(--brand);}
.faq-item[open] summary .chev{transform:rotate(180deg);}
.faq-panel{padding:0 22px 20px;background:#F7FBFF;color:var(--muted);font-size:15px;line-height:1.8;}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--brand-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cta-inner{display:flex;flex-direction:column;align-items:flex-start;gap:18px;padding:36px 0;}
@media (min-width:900px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 0;}}
.cta-inner h2{font-size:22px;font-weight:600;line-height:1.3;}
@media (min-width:1024px){.cta-inner h2{font-size:26px;}}
.cta-inner p{margin-top:8px;color:var(--muted);font-size:15px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#fff;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;}}
.footer-logo .logo-text{color:#fff;}
.footer-logo .logo-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-desc{margin:14px 0 18px;max-width:340px;color:rgba(255,255,255,.68);font-size:14px;line-height:1.75;}
.footer-title{margin:0 0 14px;font-size:15px;font-weight:600;color:#fff;}
.footer-links{display:grid;gap:10px;}
.footer-links a{color:rgba(255,255,255,.7);font-size:14px;transition:color .18s ease-out;}
@media (hover:hover){.footer-links a:hover{color:#fff;}}
.footer-bottom{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;margin-top:44px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.6);}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
    --brand:#0F6FCE;
    --brand-hover:#0C5CAF;
    --brand-soft:#E8F2FD;
    --accent:#FF7A45;
    --accent-hover:#F1632C;
    --accent-soft:#FFF1EB;
    --success:#12B886;
    --warn:#E5484D;
    --ink:#0F1F33;
    --muted:#5B6E84;
    --faint:#8A9AAC;
    --line:#E2E9F2;
    --page:#F4F7FB;
    --surf:#FFFFFF;
    --deep:#102A43;
    --radius-card:16px;
    --radius-ctrl:10px;
    --radius-lg:20px;
    --shadow-card:0 1px 2px rgba(15,31,51,.04), 0 8px 24px rgba(15,31,51,.06);
    --shadow-hover:0 12px 32px rgba(15,31,51,.10);
    --shadow-cta:0 8px 20px rgba(255,122,69,.28);
    --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei","Inter",system-ui,-apple-system,sans-serif;
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::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:1.75;
    color:var(--ink);
    background:var(--page);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:600}
  p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  [id]{scroll-margin-top:84px}
  ::selection{background:var(--brand-soft);color:var(--brand-hover)}

  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media(min-width:768px){.container{padding:0 24px}}
  @media(min-width:1024px){.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 var(--ease);
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-card)}
  .header-inner{display:flex;align-items:center;gap:18px;height:64px}

  .logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;
    background:var(--brand-soft);color:var(--brand);
    display:flex;align-items:center;justify-content:center;
    border:1px solid rgba(15,111,206,.16);
    flex-shrink:0;
  }
  .logo-text{font-size:16px;font-weight:600;letter-spacing:.2px;color:var(--ink);white-space:nowrap}

  .nav-channels{display:flex;align-items:center;gap:2px;margin-left:6px}
  .nav-link{
    position:relative;
    display:inline-flex;align-items:center;height:64px;
    padding:0 14px;font-size:15px;color:var(--muted);
    transition:color .18s var(--ease);
  }
  @media(hover:hover){.nav-link:hover{color:var(--brand)}}
  .nav-link.is-active{color:var(--brand);font-weight:600}
  .nav-link.is-active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:0;
    height:2px;border-radius:2px;background:var(--brand);
  }

  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

  .search-box{
    display:flex;align-items:center;gap:8px;
    width:220px;height:40px;padding:0 14px;
    border:1px solid var(--line);border-radius:999px;background:#F7FAFD;
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
  }
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,206,.14);background:#fff}
  .search-box svg{flex-shrink:0;color:var(--faint)}
  .search-box input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
  .search-box input::placeholder{color:var(--faint)}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;
    border-radius:var(--radius-ctrl);border:1px solid transparent;
    font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
    transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
  }
  .btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-cta)}
  .btn-outline{background:#fff;color:var(--brand);border-color:rgba(15,111,206,.38)}
  .btn-quiet{background:transparent;color:var(--ink);padding:0 14px;font-weight:500}
  .btn-block{width:100%}
  @media(hover:hover){
    .btn:hover{transform:translateY(-1px)}
    .btn-accent:hover{background:var(--accent-hover)}
    .btn-outline:hover{border-color:var(--brand);background:var(--brand-soft)}
    .btn-quiet:hover{color:var(--brand);background:var(--brand-soft)}
  }
  .btn:active{transform:translateY(0);filter:brightness(.97)}
  .btn[disabled]{opacity:.45;pointer-events:none}

  .menu-toggle{
    display:none;width:44px;height:44px;
    border-radius:var(--radius-ctrl);border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;cursor:pointer;color:var(--ink);
    transition:border-color .18s var(--ease),color .18s var(--ease);
  }
  @media(hover:hover){.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}}

  @media(max-width:1100px){
    .search-box{width:180px}
    .nav-link{padding:0 10px}
    .nav-link.is-active::after{left:10px;right:10px}
  }
  @media(max-width:1023px){
    .nav-channels{display:none}
    .search-box{display:none}
    .btn-quiet{display:none}
    .menu-toggle{display:inline-flex}
  }
  @media(max-width:639px){
    .header-inner{height:56px;gap:12px}
    .header-actions .btn-accent{display:none}
    .logo-text{font-size:15px}
  }

  /* ============ 抽屉导航 ============ */
  .drawer-mask{
    position:fixed;inset:0;z-index:80;
    background:rgba(15,31,51,.42);
    opacity:0;visibility:hidden;
    transition:opacity .2s var(--ease),visibility .2s var(--ease);
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(78vw,344px);
    background:#fff;
    display:flex;flex-direction:column;gap:20px;
    padding:20px;overflow-y:auto;
    transform:translateX(102%);
    transition:transform .24s var(--ease);
    box-shadow:-12px 0 32px rgba(15,31,51,.12);
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
  .drawer-close{
    width:40px;height:40px;border-radius:var(--radius-ctrl);
    border:1px solid var(--line);background:#fff;cursor:pointer;
    display:flex;align-items:center;justify-content:center;color:var(--muted);
  }
  .drawer-search{width:100%}
  .drawer-nav{display:grid;gap:6px}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;padding:0 14px;border-radius:var(--radius-ctrl);
    font-size:15px;color:var(--muted);
    transition:background-color .18s var(--ease),color .18s var(--ease);
  }
  .drawer-link.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
  .drawer-actions{display:grid;gap:10px;margin-top:auto}

  /* ============ 分类页横幅 ============ */
  .category-banner{
    position:relative;
    padding:44px 0 40px;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(102deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.92) 44%,rgba(232,242,253,.72) 100%),
      url('/assets/images/backpic/back-2.png');
    background-size:cover,cover;
    background-position:center,center;
    overflow:hidden;
  }
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--muted);margin-bottom:18px;
  }
  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
  .breadcrumb li{display:inline-flex;align-items:center;gap:8px}
  .breadcrumb a{color:var(--muted);transition:color .18s var(--ease)}
  @media(hover:hover){.breadcrumb a:hover{color:var(--brand)}}
  .breadcrumb .sep{color:var(--faint)}
  .breadcrumb .current{color:var(--ink);font-weight:500}

  .banner-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:600;margin-bottom:16px;
  }
  .banner-title{
    font-size:clamp(28px,4.2vw,42px);
    font-weight:600;line-height:1.22;
    letter-spacing:-.4px;
    max-width:820px;
  }
  .banner-desc{
    margin-top:16px;max-width:660px;
    font-size:16px;line-height:1.8;color:var(--muted);
  }
  @media(min-width:1024px){.banner-desc{font-size:17px}}
  .banner-anchors{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .chip{
    display:inline-flex;align-items:center;gap:6px;
    min-height:40px;padding:0 16px;border-radius:999px;
    border:1px solid var(--line);background:#fff;
    font-size:14px;color:var(--muted);
    transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
  }
  @media(hover:hover){
    .chip:hover{color:var(--brand);border-color:rgba(15,111,206,.45);background:var(--brand-soft)}
  }
  @media(max-width:639px){
    .category-banner{padding:32px 0 30px}
    .banner-desc{font-size:15px}
  }

  /* ============ 通用板块 ============ */
  .section{padding:56px 0}
  @media(min-width:1024px){.section{padding:88px 0}}
  .section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

  .section-head{max-width:740px;margin-bottom:32px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:600;margin-bottom:14px;
  }
  .section-head h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.2px}
  .section-head p{margin-top:12px;color:var(--muted);font-size:16px}

  /* ============ 问题类型 ============ */
  .issue-grid{display:grid;grid-template-columns:1fr;gap:16px}
  @media(min-width:768px){.issue-grid{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){.issue-grid{grid-template-columns:repeat(4,1fr)}}
  .issue-card{
    position:relative;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    padding:22px 20px 22px 26px;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .issue-card::before{
    content:"";position:absolute;left:0;top:20px;bottom:20px;width:4px;
    border-radius:0 4px 4px 0;background:var(--brand);
  }
  .issue-card h3{font-size:17px;margin-bottom:8px}
  .issue-card p{font-size:14px;color:var(--muted);line-height:1.72}
  @media(hover:hover){
    .issue-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.22)}
  }

  /* ============ 步骤时间轴 ============ */
  .timeline{position:relative;max-width:920px}
  .step{
    position:relative;
    display:grid;grid-template-columns:56px 1fr;gap:20px;
    padding-bottom:28px;
  }
  .step:last-child{padding-bottom:0}
  .step:not(:last-child)::before{
    content:"";position:absolute;left:27.5px;top:60px;bottom:0;width:1px;
    background:var(--line);
  }
  .step-num{
    width:56px;height:56px;border-radius:50%;
    background:#fff;border:1px solid var(--brand);color:var(--brand);
    display:flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:600;font-variant-numeric:tabular-nums;
    position:relative;z-index:1;
  }
  .step-body{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    padding:22px 24px;
    transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  @media(hover:hover){
    .step-body:hover{box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.2)}
  }
  .step-body h3{font-size:18px;margin-bottom:10px}
  .step-body > p{color:var(--muted);font-size:15px;line-height:1.8}
  .step-points{margin-top:12px;display:grid;gap:8px}
  .step-points li{position:relative;padding-left:20px;font-size:14px;color:var(--muted);line-height:1.75}
  .step-points li::before{
    content:"";position:absolute;left:0;top:9px;
    width:8px;height:8px;border-radius:50%;
    background:var(--brand-soft);border:1.5px solid var(--brand);
  }
  .step-img{
    margin-top:16px;width:100%;height:190px;object-fit:cover;
    border-radius:12px;border:1px solid var(--line);
  }
  @media(max-width:639px){
    .step{grid-template-columns:40px 1fr;gap:14px;padding-bottom:22px}
    .step-num{width:40px;height:40px;font-size:15px}
    .step:not(:last-child)::before{left:19.5px;top:44px}
    .step-body{padding:18px 16px}
    .step-img{height:150px}
  }

  /* ============ FAQ ============ */
  .faq-list{
    max-width:920px;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);overflow:hidden;
  }
  .faq-item + .faq-item{border-top:1px solid var(--line)}
  .faq-q{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;cursor:pointer;
    font-size:16px;font-weight:600;color:var(--ink);
    list-style:none;
    transition:background-color .18s var(--ease);
  }
  .faq-q::-webkit-details-marker{display:none}
  @media(hover:hover){.faq-q:hover{background:#F7FBFF}}
  .faq-icon{flex-shrink:0;color:var(--brand);transition:transform .18s var(--ease)}
  details[open] .faq-icon{transform:rotate(180deg)}
  .faq-a{
    background:#F7FBFF;border-top:1px solid var(--line);
    padding:16px 22px 20px;
    font-size:15px;line-height:1.8;color:var(--muted);
  }
  @media(max-width:639px){
    .faq-q{padding:16px;font-size:15px}
    .faq-a{padding:14px 16px 18px}
  }

  /* ============ 下一步入口 ============ */
  .next-grid{display:grid;gap:16px}
  @media(min-width:768px){.next-grid{grid-template-columns:repeat(3,1fr)}}
  .next-card{
    display:flex;flex-direction:column;gap:10px;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);padding:22px;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .next-card h3{font-size:17px}
  .next-card p{font-size:14px;color:var(--muted);line-height:1.75;flex:1}
  .next-card .arrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--brand);
  }
  @media(hover:hover){
    .next-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(15,111,206,.24)}
  }

  /* ============ CTA 横条 ============ */
  .cta-band{
    background:linear-gradient(120deg,var(--brand-soft) 0%,#F7FBFF 100%);
    border:1px solid rgba(15,111,206,.16);
    border-radius:var(--radius-lg);
    padding:28px 32px;
    display:flex;flex-wrap:wrap;align-items:center;gap:20px;justify-content:space-between;
  }
  .cta-band h2{font-size:clamp(20px,2.4vw,26px)}
  .cta-band p{margin-top:8px;font-size:15px;color:var(--muted);max-width:580px}
  @media(max-width:639px){
    .cta-band{padding:22px 18px}
  }

  /* ============ 页脚 ============ */
  .site-footer{background:var(--deep);color:rgba(255,255,255,.72);margin-top:56px}
  .site-footer .container{padding-top:56px;padding-bottom:26px}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:36px}
  @media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}}

  .footer-logo{margin-bottom:0}
  .footer-logo .logo-text{color:#fff}
  .footer-logo .logo-mark{
    background:rgba(255,255,255,.10);
    border-color:rgba(255,255,255,.18);
    color:#fff;
  }
  .footer-desc{
    margin:16px 0 20px;max-width:330px;
    font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);
  }
  .footer-title{font-size:15px;color:#fff;margin-bottom:16px}
  .footer-links{display:grid;gap:10px}
  .footer-links a{
    font-size:14px;color:rgba(255,255,255,.72);
    transition:color .18s var(--ease);
  }
  @media(hover:hover){.footer-links a:hover{color:#fff}}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    padding-top:20px;
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;color:rgba(255,255,255,.56);
  }

  @media(prefers-reduced-motion:reduce){
    *,*::before,*::after{transition:none !important;animation:none !important}
    html{scroll-behavior:auto}
  }