/* roulang page: index */
:root{
    --brand:#1F5BE0;
    --brand-dark:#16409F;
    --brand-soft:#EEF3FF;
    --brand-hover:#1748BC;
    --gold:#F2A63B;
    --gold-deep:#B8730F;
    --gold-soft:rgba(242,166,59,.14);
    --coral:#FF5A5F;
    --bg:#F6F8FC;
    --card:#FFFFFF;
    --ink:#0B1220;
    --text:#41506B;
    --muted:#7A88A3;
    --line:#E6EBF5;
    --edge:#E9EEF8;
    --r-kv:24px;
    --r-card:16px;
    --r-btn:12px;
    --sh-1:0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
    --sh-2:0 2px 4px rgba(11,18,32,.06), 0 18px 34px -14px rgba(11,18,32,.26);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    font-weight:400;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
  img{display:block;max-width:100%;height:auto}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input,textarea{font:inherit}
  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }
  .num{font-variant-numeric:tabular-nums}

  /* 容器 */
  .container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  @media (min-width:1440px){.container-x{max-width:1280px}}
  @media (max-width:1023px){.container-x{padding:0 20px}}
  @media (max-width:639px){.container-x{padding:0 16px}}

  /* 顶部信息条 */
  .topbar{background:#0B1220;color:#C7D3E8;font-size:13px;line-height:1.4}
  .topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;padding-top:6px;padding-bottom:6px}
  .topbar-left{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden}
  .topbar-domain{color:#fff;font-weight:600;letter-spacing:.2px}
  .topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.24);flex:0 0 auto}
  .topbar-right{display:flex;align-items:center;gap:18px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}
  .topbar-right::-webkit-scrollbar{display:none}
  .topbar-right a{color:#C7D3E8}
  .topbar-right a:hover{color:#fff}
  @media (max-width:639px){
    .topbar-inner{overflow-x:auto;scrollbar-width:none}
    .topbar-inner::-webkit-scrollbar{display:none}
  }

  /* 主导航 */
  .site-header{
    position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
    transition:box-shadow .22s ease;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px -12px rgba(11,18,32,.28)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .brand-mark{width:38px;height:38px;flex:0 0 auto}
  .brand-text{display:flex;flex-direction:column;line-height:1.2}
  .brand-name{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
  .brand-sub{font-size:11px;color:var(--muted);letter-spacing:.4px}
  .nav-list{display:flex;align-items:center;gap:2px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:68px;padding:0 11px;
    font-size:15px;color:var(--text);border-radius:8px;white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:11px;right:11px;bottom:8px;height:2px;border-radius:2px;
    background:var(--brand);transform:scaleX(0);transform-origin:center;transition:transform .18s ease;
  }
  .nav-link:hover{color:var(--brand);background:var(--brand-soft)}
  .nav-link.active{color:var(--ink);font-weight:700}
  .nav-link.active::after{transform:scaleX(1)}
  .nav-cta{display:inline-flex;align-items:center;gap:6px;height:42px;padding:0 18px;border-radius:var(--r-btn);
    background:var(--brand);color:#fff;font-size:14px;font-weight:600;box-shadow:0 1px 2px rgba(11,18,32,.06)}
  .nav-cta:hover{background:var(--brand-hover);transform:translateY(-1px)}
  .nav-cta:active{transform:translateY(0)}
  .burger{display:none;width:46px;height:46px;align-items:center;justify-content:center;border-radius:12px;border:1px solid var(--edge);background:#fff}
  .burger:hover{background:var(--brand-soft);border-color:#D7DFF0}
  .burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;position:relative}
  .burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink);border-radius:2px}
  .burger span::before{top:-6px}
  .burger span::after{top:6px}
  @media (max-width:1180px){
    .nav-link{padding:0 8px;font-size:14px}
    .brand-sub{display:none}
  }
  @media (max-width:1023px){
    .nav-list,.nav-cta{display:none}
    .burger{display:inline-flex}
  }

  /* 抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.4);opacity:0;visibility:hidden;
    transition:opacity .22s ease,visibility .22s ease;z-index:80;
  }
  .drawer-mask.open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:82%;max-width:360px;background:#fff;z-index:90;
    transform:translateX(100%);transition:transform .26s ease;display:flex;flex-direction:column;
    box-shadow:-12px 0 32px -18px rgba(11,18,32,.35);overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
  .drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--edge);display:flex;align-items:center;justify-content:center;color:var(--muted)}
  .drawer-close:hover{background:var(--brand-soft);color:var(--brand)}
  .drawer-nav{padding:12px 12px 0}
  .drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:0 12px;border-radius:10px;font-size:15px;color:var(--text)}
  .drawer-link:hover{background:var(--brand-soft);color:var(--brand)}
  .drawer-link.active{color:var(--brand);font-weight:700;background:var(--brand-soft)}
  .drawer-foot{margin-top:auto;padding:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}

  /* Hero */
  .hero{position:relative;overflow:hidden;background:#fff}
  .hero-bg{
    position:absolute;inset:0;background-image:url(/assets/images/backpic/back-1.png);
    background-size:cover;background-position:center;opacity:1;
  }
  .hero-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(102deg, rgba(255,255,255,.97) 0%, rgba(238,243,255,.94) 46%, rgba(31,91,224,.10) 100%);
  }
  .hero-arc{
    position:absolute;right:-8%;bottom:-38%;width:640px;height:640px;border-radius:50%;
    border:2px solid rgba(31,91,224,.10);pointer-events:none;
  }
  .hero-arc.two{right:6%;bottom:-30%;width:420px;height:420px;border-color:rgba(242,166,59,.12)}
  .hero-grid{
    position:relative;display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center;
    min-height:600px;padding:56px 0 64px;
  }
  .pill{
    display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
    background:#fff;border:1px solid #D7DFF0;color:var(--brand);font-size:13px;font-weight:600;
  }
  .pill-dot{width:6px;height:6px;border-radius:50%;background:var(--gold)}
  .hero h1{
    margin-top:18px;font-size:clamp(30px,4.4vw,46px);line-height:1.2;font-weight:800;color:var(--ink);
    letter-spacing:-.4px;
  }
  .hero-sub{margin-top:14px;font-size:17px;color:var(--text);max-width:34em}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  .hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;font-size:13px;color:var(--muted)}
  .hero-points li{display:flex;align-items:center;gap:8px}
  .hero-points b{color:var(--ink);font-weight:700}
  .hero-points .dot{width:5px;height:5px;border-radius:50%;background:#C7D3E8}
  .hero-media{position:relative}
  .hero-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-kv);border:6px solid #fff;box-shadow:var(--sh-2)}
  .hero-float{
    position:absolute;left:16px;bottom:16px;display:flex;align-items:center;gap:10px;
    background:rgba(255,255,255,.96);border:1px solid var(--edge);border-radius:14px;padding:10px 14px;
    box-shadow:var(--sh-1);backdrop-filter:saturate(120%);
  }
  .hero-float-dot{width:8px;height:8px;border-radius:50%;background:#2FBF71;box-shadow:0 0 0 4px rgba(47,191,113,.16);flex:0 0 auto}
  .hero-float-title{font-size:13px;font-weight:700;color:var(--ink);line-height:1.3}
  .hero-float-sub{font-size:12px;color:var(--muted);line-height:1.3}
  @media (max-width:1023px){
    .hero-grid{grid-template-columns:1fr;gap:32px;min-height:auto;padding:40px 0 48px}
    .hero-media{order:2}
  }
  @media (max-width:639px){
    .hero-grid{padding:28px 0 36px;max-height:70vh;max-height:none}
    .hero-sub{font-size:16px}
    .hero-actions .btn{flex:1 1 100%}
  }

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;
    border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;
    border:1px solid transparent;white-space:nowrap;transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
  .btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
  .btn-outline{background:#fff;color:var(--brand);border-color:#D7DFF0}
  .btn-outline:hover{border-color:var(--brand);background:#F3F7FF;transform:translateY(-1px)}
  .btn-outline:active{transform:translateY(0)}
  .btn-white{background:#fff;color:var(--brand);box-shadow:var(--sh-1)}
  .btn-white:hover{background:#EEF3FF;transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-white:active{transform:translateY(0)}
  .btn-ghost{background:transparent;color:var(--brand);padding:0 8px;height:auto}
  .btn-ghost:hover{text-decoration:underline;text-decoration-color:var(--brand);text-decoration-thickness:2px;text-underline-offset:4px}
  .link-underline{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;font-size:14px}
  .link-underline:hover{text-decoration:underline;text-decoration-color:var(--brand);text-decoration-thickness:2px;text-underline-offset:4px}

  /* 通用板块 */
  .section{padding:80px 0}
  .section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
  .section h2{font-size:clamp(23px,2.6vw,31px);line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.2px}
  .section-desc{margin-top:10px;font-size:15px;color:var(--muted);max-width:44em}
  .eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:1px;margin-bottom:10px}
  @media (max-width:1023px){.section{padding:56px 0}}
  @media (max-width:639px){
    .section{padding:40px 0}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  }

  /* 卡片 */
  .card{
    background:var(--card);border:1px solid var(--edge);border-radius:var(--r-card);box-shadow:var(--sh-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;overflow:hidden;display:flex;flex-direction:column;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,91,224,.16)}
  .card-media{position:relative;overflow:hidden;background:#F1F4FA}
  .card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
  .card:hover .card-media img{transform:scale(1.03)}
  .card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .card-title{font-size:18px;line-height:1.45;font-weight:600;color:var(--ink)}
  .card-text{font-size:14px;line-height:1.7;color:var(--text)}
  .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:4px}

  /* 徽章 */
  .badge{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;font-size:13px;font-weight:600;line-height:1;white-space:nowrap}
  .badge-brand{background:rgba(31,91,224,.08);color:var(--brand)}
  .badge-gold{background:var(--gold-soft);color:var(--gold-deep)}
  .badge-muted{background:#F1F4FA;color:var(--muted)}
  .badge-live{background:rgba(255,90,95,.10);color:#D93B40}

  /* 截断 */
  .clamp-1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

  /* 数据条 */
  .stat-card{
    background:#fff;border:1px solid var(--edge);border-radius:var(--r-card);padding:22px 20px;
    transition:transform .2s ease,border-color .2s ease;
  }
  .stat-card:hover{transform:translateY(-2px);border-color:rgba(31,91,224,.18)}
  .stat-num{font-size:27px;font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:-.5px}
  .stat-num em{font-style:normal;font-size:14px;font-weight:600;color:var(--muted);margin-left:4px}
  .stat-label{margin-top:6px;font-size:13px;color:var(--muted)}

  /* 栏目介绍 */
  .feature-row{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--line)}
  .feature-row:last-child{border-bottom:0;padding-bottom:0}
  .feature-row:first-child{padding-top:0}
  .feature-index{
    flex:0 0 auto;width:38px;height:38px;border-radius:999px;display:flex;align-items:center;justify-content:center;
    background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;
  }
  .feature-thumb{width:96px;height:72px;border-radius:12px;object-fit:cover;flex:0 0 auto;background:#F1F4FA}
  .feature-title{font-size:17px;font-weight:600;color:var(--ink);line-height:1.5}
  .feature-text{margin-top:4px;font-size:14px;color:var(--text)}
  .hero-side-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-kv);box-shadow:var(--sh-1)}
  @media (max-width:639px){
    .feature-thumb{display:none}
  }

  /* 权益卡 */
  .perk-icon{
    width:44px;height:44px;border-radius:12px;background:var(--gold-soft);color:var(--gold-deep);
    display:flex;align-items:center;justify-content:center;flex:0 0 auto;
  }
  .perk-num{margin-top:auto;font-size:22px;font-weight:800;color:var(--gold-deep);font-variant-numeric:tabular-nums;letter-spacing:-.4px}
  .perk-num em{font-style:normal;font-size:13px;font-weight:600;color:var(--muted);margin-left:4px}

  /* 进度 */
  .progress-wrap{background:#fff;border:1px solid var(--edge);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1)}
  .progress-item{padding:16px 0;border-bottom:1px solid var(--line)}
  .progress-item:last-child{border-bottom:0;padding-bottom:0}
  .progress-item:first-child{padding-top:0}
  .progress-track{height:8px;border-radius:999px;background:var(--line);overflow:hidden}
  .progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand) 0%,var(--gold) 100%);transition:width .6s ease}
  .progress-pct{font-size:14px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}

  /* CTA 带 */
  .cta-band{
    position:relative;overflow:hidden;border-radius:20px;background:var(--brand);color:#fff;
    padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  }
  .cta-band::before{
    content:"";position:absolute;right:-60px;top:-120px;width:360px;height:360px;border-radius:50%;
    border:2px solid rgba(255,255,255,.10);
  }
  .cta-band::after{
    content:"";position:absolute;right:120px;bottom:-160px;width:260px;height:260px;border-radius:50%;
    border:2px solid rgba(255,255,255,.08);
  }
  .cta-band h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.35;position:relative}
  .cta-band p{margin-top:8px;font-size:15px;color:rgba(255,255,255,.85);position:relative;max-width:38em}
  .cta-band .btn{position:relative;flex:0 0 auto}
  @media (max-width:767px){
    .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px}
    .cta-band .btn{width:100%}
  }

  /* 列表行 */
  .list-row{
    display:flex;gap:16px;align-items:center;padding:16px;border:1px solid var(--edge);border-radius:var(--r-card);
    background:#fff;transition:background-color .18s ease,border-color .18s ease,transform .18s ease;
  }
  .list-row:hover{background:#F7FAFF;border-color:rgba(31,91,224,.18)}
  .list-row-img{width:120px;height:80px;border-radius:12px;object-fit:cover;flex:0 0 auto;background:#F1F4FA}
  .list-row-arrow{flex:0 0 auto;color:var(--brand);font-size:18px;transition:transform .18s ease}
  .list-row:hover .list-row-arrow{transform:translateX(4px)}
  @media (max-width:639px){
    .list-row-img{width:88px;height:66px}
  }

  /* 空态 */
  .empty-state{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;padding:48px 20px;border:1px dashed var(--edge);border-radius:var(--r-card);background:#fff}
  .empty-title{font-size:16px;font-weight:600;color:var(--ink)}
  .empty-text{font-size:14px;color:var(--muted)}

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--edge);border-radius:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
  .faq-item + .faq-item{margin-top:12px}
  .faq-item.open{border-color:rgba(31,91,224,.24);box-shadow:var(--sh-1)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
    padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink);min-height:56px;
  }
  .faq-q:hover{background:#F7FAFF}
  .faq-icon{
    flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid #D7DFF0;color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;
    transition:transform .18s ease,background-color .18s ease;
  }
  .faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-soft);border-color:rgba(31,91,224,.3)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
  .faq-a-inner{padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--text)}

  /* 链接矩阵 */
  .matrix{background:#fff;border:1px solid var(--edge);border-radius:var(--r-kv);padding:36px}
  .matrix h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px}
  .matrix a{display:block;font-size:14px;color:var(--text);padding:6px 0}
  .matrix a:hover{color:var(--brand)}

  /* 页脚 */
  .site-footer{background:#0B1220;color:#9FB0CC;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:60px 0 40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand-name{font-size:16px;font-weight:800;color:#fff;letter-spacing:.2px}
  .footer-text{font-size:13px;line-height:1.8;color:#8A9BB8}
  .footer-domain{margin-top:12px;font-size:13px;color:#C7D3E8}
  .footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
  .footer-links a{display:block;font-size:13px;color:#9FB0CC;padding:6px 0}
  .footer-links a:hover{color:#fff}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7F8FA8}
  .to-top{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:10px;border:1px solid rgba(255,255,255,.16);color:#C7D3E8}
  .to-top:hover{background:rgba(255,255,255,.08);color:#fff}
  @media (max-width:1023px){
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
  }
  @media (max-width:639px){
    .footer-grid{grid-template-columns:1fr;gap:28px;padding:36px 0 24px}
  }

  /* 表单 */
  .form-label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
  .form-input{
    width:100%;height:46px;border-radius:12px;border:1px solid #D7DFF0;background:#fff;
    padding:0 14px;font-size:15px;color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease;
  }
  .form-input::placeholder{color:var(--muted)}
  .form-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,91,224,.12)}

  /* 滚动条 */
  @media (min-width:1024px){
    ::-webkit-scrollbar{width:10px;height:10px}
    ::-webkit-scrollbar-track{background:transparent}
    ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px;border:2px solid transparent;background-clip:content-box}
    ::-webkit-scrollbar-thumb:hover{background:#AFC0DF;background-clip:content-box}
  }

/* roulang page: category1 */
:root{
    --brand:#1F5BE0;
    --brand-dark:#16409F;
    --brand-hover:#1748BC;
    --brand-soft:#EEF3FF;
    --amber:#F2A63B;
    --amber-deep:#A96A12;
    --coral:#FF5A5F;
    --page:#F6F8FC;
    --card:#FFFFFF;
    --ink:#0B1220;
    --text:#41506B;
    --muted:#7A88A3;
    --line:#E6EBF5;
    --stroke:#E9EEF8;
    --input:#D7DFF0;
    --r-kv:24px;
    --r-card:16px;
    --r-btn:12px;
    --shadow-base:0 1px 2px rgba(11,18,32,.06),0 8px 24px -12px rgba(11,18,32,.18);
    --shadow-hover:0 2px 4px rgba(11,18,32,.07),0 16px 32px -14px rgba(11,18,32,.24);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--page);
    color:var(--text);
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    font-weight:400;
  }
  h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
  p{margin:0}
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block;height:auto}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
  .num{font-variant-numeric:tabular-nums}

  /* 容器 */
  .container-x{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 24px;
  }
  @media (min-width:1440px){
    .container-x{max-width:1280px}
  }
  @media (max-width:1023px){
    .container-x{padding:0 20px}
  }
  @media (max-width:640px){
    .container-x{padding:0 16px}
  }

  /* 顶部信息条 */
  .topbar{
    background:var(--ink);
    color:#C6D2E8;
    font-size:13px;
    line-height:1;
  }
  .topbar-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:38px;
    padding-top:8px;
    padding-bottom:8px;
  }
  .topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
  .topbar-domain{
    display:inline-flex;
    align-items:center;
    padding:3px 10px;
    border-radius:999px;
    background:rgba(255,255,255,.09);
    color:#EAF0FB;
    font-weight:600;
    font-variant-numeric:tabular-nums;
    white-space:nowrap;
  }
  .topbar-note{
    color:#9FB0CC;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .topbar-right{display:flex;align-items:center;gap:20px;flex-wrap:nowrap}
  .topbar-right a{
    color:#C6D2E8;
    white-space:nowrap;
    padding:4px 0;
    transition:color .18s ease;
  }
  .topbar-right a:hover{color:#FFFFFF;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--brand)}
  @media (max-width:1023px){
    .topbar-inner{
      overflow-x:auto;
      scrollbar-width:none;
      justify-content:flex-start;
      gap:20px;
    }
    .topbar-inner::-webkit-scrollbar{display:none}
    .topbar-note{display:none}
  }

  /* 主导航 */
  .mainnav{
    position:sticky;
    top:0;
    z-index:60;
    background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .mainnav.is-scrolled{box-shadow:0 6px 20px -14px rgba(11,18,32,.35)}
  .mainnav-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    min-height:72px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-name{
    font-size:17px;
    font-weight:800;
    color:var(--ink);
    letter-spacing:.2px;
    white-space:nowrap;
  }
  .nav-links{
    display:flex;
    align-items:center;
    gap:2px;
    flex-wrap:nowrap;
  }
  .nav-links a{
    position:relative;
    display:inline-flex;
    align-items:center;
    min-height:44px;
    padding:0 12px;
    font-size:15px;
    color:var(--text);
    border-radius:8px;
    white-space:nowrap;
    transition:color .18s ease,background-color .18s ease;
  }
  .nav-links a:hover{color:var(--brand);background:var(--brand-soft)}
  .nav-links a.is-active{
    color:var(--brand);
    font-weight:700;
  }
  .nav-links a.is-active::after{
    content:"";
    position:absolute;
    left:12px;
    right:12px;
    bottom:6px;
    height:2px;
    border-radius:2px;
    background:var(--brand);
  }
  .nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:46px;
    padding:0 20px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  }
  .btn-primary{
    background:var(--brand);
    color:#fff;
    box-shadow:var(--shadow-base);
  }
  .btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--shadow-hover)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{
    background:#fff;
    color:var(--brand);
    border-color:var(--input);
  }
  .btn-ghost:hover{border-color:var(--brand);background:#F3F7FF}
  .btn-white{
    background:#fff;
    color:var(--brand);
    box-shadow:0 10px 26px -12px rgba(11,18,32,.5);
  }
  .btn-white:hover{background:#F3F7FF;transform:translateY(-1px)}
  .btn-sm{min-height:40px;padding:0 16px;font-size:14px}
  .hamburger{
    display:none;
    width:44px;
    height:44px;
    border-radius:10px;
    align-items:center;
    justify-content:center;
    border:1px solid var(--stroke);
    background:#fff;
  }
  .hamburger:hover{background:var(--brand-soft)}
  .hamburger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px}
  .hamburger span + span{margin-top:6px}

  /* 抽屉 */
  .drawer-mask{
    position:fixed;
    inset:0;
    background:rgba(11,18,32,.4);
    opacity:0;
    visibility:hidden;
    transition:opacity .22s ease,visibility .22s ease;
    z-index:80;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:82%;
    max-width:360px;
    background:#fff;
    transform:translateX(100%);
    transition:transform .26s ease;
    z-index:90;
    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:16px}
  .drawer-close{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--stroke);
    display:inline-flex;align-items:center;justify-content:center;font-size:20px;color:var(--muted);
  }
  .drawer-close:hover{background:var(--brand-soft);color:var(--brand)}
  .drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:18px}
  .drawer-nav a{
    display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
    font-size:16px;color:var(--text);
  }
  .drawer-nav a:hover{background:var(--brand-soft);color:var(--brand)}
  .drawer-nav a.is-active{color:var(--brand);font-weight:700;background:var(--brand-soft)}
  .drawer-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}

  @media (max-width:1023px){
    .nav-links{display:none}
    .nav-actions .btn-primary{display:none}
    .hamburger{display:inline-flex}
    .mainnav-inner{min-height:64px}
  }

  /* 面包屑 */
  .breadcrumb{padding:20px 0 0}
  .breadcrumb ol{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
  .breadcrumb a{color:var(--muted)}
  .breadcrumb a:hover{color:var(--brand);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
  .breadcrumb .sep{color:#C7D3E8}
  .breadcrumb .current{color:var(--ink);font-weight:600}

  /* 页头 */
  .page-head{padding:28px 0 0}
  .page-head-inner{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:24px;
    flex-wrap:wrap;
  }
  .page-head h1{font-size:clamp(30px,4.4vw,48px);font-weight:800;line-height:1.2}
  .page-sub{margin-top:10px;color:var(--muted);font-size:15px}
  .page-stat{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 14px;
    border-radius:999px;
    background:#fff;
    border:1px solid var(--stroke);
    font-size:13px;
    color:var(--muted);
    white-space:nowrap;
  }
  .page-stat strong{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}

  /* 板块 */
  .section{padding:56px 0 0}
  .section:last-of-type{padding-bottom:0}
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:20px;
    margin-bottom:24px;
  }
  .section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700}
  .section-head p{margin-top:8px;font-size:14px;color:var(--muted)}
  .link-more{
    font-size:14px;
    font-weight:600;
    color:var(--brand);
    white-space:nowrap;
  }
  .link-more:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}

  /* 导读卡 */
  .lead-card{
    display:grid;
    grid-template-columns:7fr 5fr;
    gap:0;
    background:#fff;
    border:1px solid var(--stroke);
    border-radius:var(--r-kv);
    overflow:hidden;
    box-shadow:var(--shadow-base);
  }
  .lead-body{padding:32px}
  .lead-body h3{font-size:20px;font-weight:700;margin-bottom:12px}
  .lead-body p{font-size:16px;color:var(--text);line-height:1.8}
  .lead-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
  .chip{
    display:inline-flex;
    align-items:center;
    padding:5px 12px;
    border-radius:999px;
    background:var(--brand-soft);
    color:var(--brand);
    font-size:13px;
    font-weight:600;
  }
  .chip-amber{background:rgba(242,166,59,.14);color:var(--amber-deep)}
  .lead-media{position:relative;min-height:280px}
  .lead-media img{width:100%;height:100%;object-fit:cover;object-position:center}
  @media (max-width:1023px){
    .lead-card{grid-template-columns:1fr}
    .lead-media{min-height:220px;order:-1}
    .lead-body{padding:24px}
  }

  /* 条目列表：横向行 */
  .entry-list{
    background:#fff;
    border:1px solid var(--stroke);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-base);
    overflow:hidden;
  }
  .entry-row + .entry-row{border-top:1px solid var(--line)}
  .row-link{
    display:grid;
    grid-template-columns:160px 1fr 24px;
    align-items:center;
    gap:20px;
    padding:16px 20px;
    transition:background-color .18s ease;
  }
  .row-link:hover{background:#F7FAFF}
  .row-thumb{
    width:160px;
    height:110px;
    object-fit:cover;
    border-radius:12px;
    background:#F1F4FA;
  }
  .row-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
  .row-time{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
  .row-title{font-size:18px;font-weight:600;line-height:1.45}
  .row-desc{
    margin-top:6px;
    font-size:14px;
    color:var(--muted);
    line-height:1.7;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .row-link:hover .row-title{color:var(--brand)}
  .row-arrow{
    font-size:18px;
    color:var(--brand);
    transition:transform .18s ease;
    line-height:1;
  }
  .row-link:hover .row-arrow{transform:translateX(4px)}
  .badge{
    display:inline-flex;
    align-items:center;
    padding:3px 10px;
    border-radius:999px;
    font-size:13px;
    font-weight:600;
    background:var(--brand-soft);
    color:var(--brand);
  }
  .badge-amber{background:rgba(242,166,59,.14);color:var(--amber-deep)}
  @media (max-width:640px){
    .row-link{
      grid-template-columns:96px 1fr;
      grid-template-areas:"thumb body" "thumb arrow";
      gap:12px;
      padding:14px;
    }
    .row-thumb{width:96px;height:72px;grid-area:thumb}
    .row-body{grid-area:body}
    .row-arrow{grid-area:arrow;justify-self:end;font-size:16px}
    .row-title{font-size:16px}
    .row-desc{-webkit-line-clamp:2;font-size:13px}
  }

  /* 对比卡 */
  .compare-grid{display:grid;grid-template-columns:6fr 6fr;gap:24px}
  .plain-card{
    background:#fff;
    border:1px solid var(--stroke);
    border-radius:var(--r-card);
    padding:24px;
  }
  .plain-card h3{font-size:18px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:10px}
  .dot{width:10px;height:10px;border-radius:999px;background:var(--brand);flex-shrink:0}
  .dot-amber{background:var(--amber)}
  .num-list li{
    display:flex;
    gap:12px;
    padding:10px 0;
    border-bottom:1px dashed var(--line);
    font-size:15px;
    color:var(--text);
  }
  .num-list li:last-child{border-bottom:0;padding-bottom:0}
  .num-list .idx{
    flex-shrink:0;
    width:24px;height:24px;border-radius:999px;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
    margin-top:3px;
  }
  .num-list .idx-amber{background:rgba(242,166,59,.16);color:var(--amber-deep)}
  @media (max-width:1023px){
    .compare-grid{grid-template-columns:1fr;gap:16px}
  }

  /* FAQ */
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{
    background:#fff;
    border:1px solid var(--stroke);
    border-radius:12px;
    overflow:hidden;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .faq-item:hover{border-color:#D5E0F5}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:18px 20px;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--ink);
    min-height:44px;
  }
  .faq-icon{
    flex-shrink:0;
    width:28px;height:28px;border-radius:999px;
    border:1px solid var(--input);
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--brand);
    font-size:16px;
    line-height:1;
    transition:transform .18s ease,background-color .18s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--brand-soft);border-color:var(--brand)}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .22s ease;
  }
  .faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

  /* CTA 带 */
  .cta-band{
    position:relative;
    margin-top:56px;
    background:var(--brand);
    border-radius:20px;
    overflow:hidden;
    padding:40px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    box-shadow:0 20px 44px -24px rgba(31,91,224,.7);
  }
  .cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,28px);font-weight:700}
  .cta-band p{color:rgba(255,255,255,.82);margin-top:10px;font-size:15px;max-width:640px}
  .cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}
  .cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
  .cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
  .cta-deco{
    position:absolute;
    right:-60px;
    top:-70px;
    width:400px;
    height:400px;
    opacity:.09;
    pointer-events:none;
  }
  @media (max-width:1023px){
    .cta-band{flex-direction:column;align-items:flex-start;padding:28px}
    .cta-band .cta-actions{width:100%}
    .cta-band .btn{flex:1 1 100%}
  }

  /* 页脚 */
  .site-footer{
    margin-top:64px;
    background:var(--ink);
    color:#AEBBD3;
    padding:56px 0 24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1fr;
    gap:32px;
    padding-bottom:32px;
    border-bottom:1px solid rgba(255,255,255,.1);
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand-name{color:#fff;font-size:16px;font-weight:800;letter-spacing:.2px}
  .footer-text{font-size:14px;line-height:1.8;color:#9AA9C4}
  .footer-domain{font-size:13px;color:#7F90AD;margin-top:10px;font-variant-numeric:tabular-nums}
  .footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-links a{font-size:14px;color:#AEBBD3;transition:color .18s ease}
  .footer-links a:hover{color:#fff;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--brand)}
  .footer-bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    padding-top:20px;
    font-size:13px;
    color:#7F90AD;
  }
  .to-top{color:#C6D2E8}
  .to-top:hover{color:#fff;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
  @media (max-width:1023px){
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  }
  @media (max-width:640px){
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .site-footer{padding-top:40px}
  }

  /* 滚动条 */
  @media (min-width:1024px){
    ::-webkit-scrollbar{width:10px;height:10px}
    ::-webkit-scrollbar-track{background:transparent}
    ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px;border:2px solid var(--page)}
    ::-webkit-scrollbar-thumb:hover{background:#B4C3DE}
  }

/* roulang page: article */
:root{
  --brand:#1F5BE0;
  --brand-dark:#16409F;
  --brand-hover:#1748BC;
  --brand-light:#EEF3FF;
  --amber:#F2A63B;
  --amber-deep:#A96A0B;
  --coral:#FF5A5F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --ink:#0B1220;
  --text:#41506B;
  --muted:#7A88A3;
  --line:#E6EBF5;
  --stroke:#E9EEF8;
  --stroke-strong:#D7DFF0;
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
  --sh-2:0 2px 6px rgba(11,18,32,.08), 0 18px 38px -18px rgba(11,18,32,.30);
  --sec:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
h1,h2,h3{color:var(--ink);margin:0}
ul,ol{margin:0}
.num{font-variant-numeric:tabular-nums}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container-x{max-width:1280px}}
@media (max-width:640px){.container-x{padding:0 16px}}
.section{padding:var(--sec) 0}
@media (max-width:1023px){.section{padding:56px 0}}
@media (max-width:640px){.section{padding:40px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3}
.section-sub{margin:8px 0 0;font-size:14px;color:var(--muted)}
.text-link{color:var(--brand);font-weight:600;font-size:14px;padding:6px 0}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}

/* 顶部信息条 */
.topbar{background:#0B1220;color:#B9C6DE;font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:18px;min-height:38px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}
.topbar-inner::-webkit-scrollbar{display:none}
.topbar-domain{color:#fff;font-weight:700;letter-spacing:.4px}
.topbar-note{color:#8C9CB9}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:16px}
.topbar-right a{color:#C9D4EA;padding:6px 0;transition:color .18s ease}
.topbar-right a:hover{color:#fff}

/* 主导航 */
.mainnav{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.mainnav.is-scrolled{box-shadow:0 8px 24px -16px rgba(11,18,32,.28)}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text);transition:color .18s ease,background-color .18s ease}
.nav-links a:hover{color:var(--brand);background:var(--brand-light)}
.nav-links a.active{color:var(--brand);font-weight:700}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:-15px;height:2px;border-radius:2px;background:var(--brand)}
.nav-cta{flex:0 0 auto}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--stroke-strong);background:#fff;border-radius:12px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .nav-inner{min-height:62px}
  .brand-name{font-size:15px}
}

/* 抽屉 */
.drawer{position:fixed;top:0;right:0;height:100%;width:82%;max-width:360px;background:#fff;z-index:80;transform:translateX(100%);transition:transform .28s ease;padding:20px 18px 28px;overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink)}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--stroke-strong);background:#fff;font-size:20px;line-height:1;color:var(--text)}
.drawer-links{display:flex;flex-direction:column}
.drawer-links a{padding:14px 10px;border-bottom:1px solid var(--line);font-size:15px;font-weight:600;color:var(--ink);min-height:44px;display:flex;align-items:center}
.drawer-links a.active{color:var(--brand)}
.drawer-links a:hover{background:#F7FAFF;color:var(--brand)}
.drawer-cta{margin-top:16px;width:100%}
.drawer-note{font-size:13px;color:var(--muted);margin:12px 0 0}
.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.4);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:70}
.drawer-mask.open{opacity:1;visibility:visible}
@media (min-width:1024px){.drawer,.drawer-mask{display:none}}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:12px;font-size:15px;font-weight:600;border:1px solid transparent;transition:all .18s ease;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--stroke-strong)}
.btn-ghost:hover{border-color:var(--brand);background:#F3F7FF}
.btn-white{background:#fff;color:var(--brand)}
.btn-white:hover{background:#F3F7FF;transform:translateY(-1px);box-shadow:var(--sh-2)}

/* 徽章 */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:13px;font-weight:600}
.badge-brand{background:rgba(31,91,224,.08);color:var(--brand)}
.badge-amber{background:rgba(242,166,59,.16);color:var(--amber-deep)}

/* 面包屑 */
.crumbs-bar{background:#fff;border-bottom:1px solid var(--line)}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:14px 0;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--text)}
.crumbs a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.crumbs .sep{color:#C3CDE0}
.crumbs .cur{color:var(--ink);font-weight:600}

/* 文章布局 */
.article-shell{padding:40px 0 var(--sec)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.article-main{max-width:780px;min-width:0}
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
@media (max-width:1023px){
  .article-shell{padding:28px 0 56px}
  .article-grid{grid-template-columns:1fr;gap:32px}
  .article-side{position:static}
}

.article-head{margin-bottom:24px}
.article-head h1{font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.32;margin:14px 0 0;letter-spacing:.2px}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:16px;font-size:13px;color:var(--muted)}
.article-meta .meta-item{display:inline-flex;align-items:center}
.article-meta > * + *::before{content:"·";margin-right:10px;color:#C3CDE0}
.article-cover{margin:0 0 32px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--stroke);background:#F1F4FA}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

.article-body{font-size:17px;line-height:1.85;color:var(--text);word-break:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:26px;font-weight:700;line-height:1.4;margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand);scroll-margin-top:100px}
.article-body h3{font-size:20px;font-weight:600;line-height:1.5;margin:28px 0 12px;scroll-margin-top:100px}
.article-body blockquote{margin:24px 0;padding:20px;background:var(--brand-light);border-left:4px solid var(--brand);border-radius:12px;color:var(--text)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em}
.article-body li{margin:.4em 0;line-height:1.8}
.article-body ol{list-style:decimal}
.article-body ul{list-style:disc}
.article-body li::marker{color:var(--brand);font-weight:600}
.article-body img{border-radius:16px;margin:24px auto;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.article-body table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;margin:24px 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap}
.article-body th{background:#F7FAFF;color:var(--ink);font-weight:600}
.article-body code{background:#F1F4FA;border-radius:6px;padding:2px 6px;font-size:15px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}

.empty-state{background:#fff;border:1px dashed var(--stroke-strong);border-radius:var(--r-md);padding:48px 24px;text-align:center}
.empty-state svg{margin:0 auto 16px}
.empty-title{font-size:16px;font-weight:600;color:var(--ink);margin:0 0 6px}
.empty-sub{font-size:14px;color:var(--muted);margin:0 0 20px}

.article-foot{margin-top:40px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
.article-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;background:#F1F4FA;color:var(--text);font-size:13px}
.tag:hover{background:var(--brand-light);color:var(--brand)}
.article-actions{display:flex;gap:10px;flex-wrap:wrap}
.article-actions .btn{height:42px;font-size:14px;padding:0 16px}

/* 侧栏卡 */
.side-card{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-md);padding:20px}
.side-card h3{font-size:15px;font-weight:700;margin:0 0 14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand)}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-link{display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--text);line-height:1.5;border-left:2px solid transparent}
.toc-link:hover{background:#F7FAFF;color:var(--brand)}
.toc-link.active{color:var(--brand);font-weight:600;background:var(--brand-light);border-left-color:var(--brand)}
.side-list{display:flex;flex-direction:column}
.side-row{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.side-row:last-child{border-bottom:none;padding-bottom:0}
.side-row img{width:96px;height:72px;object-fit:cover;border-radius:12px;flex:0 0 auto;background:#F1F4FA}
.side-row .row-title{font-size:15px;font-weight:600;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-row .row-meta{font-size:13px;color:var(--muted);margin-top:6px}
.side-row:hover .row-title{color:var(--brand)}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media (max-width:1023px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.related-grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;display:flex;flex-direction:column}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,91,224,.12)}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#F1F4FA}
.card-body{padding:18px 20px 20px}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{margin:8px 0 0;font-size:14px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:13px;color:var(--muted)}
.card-arrow{color:var(--brand);font-weight:600}
.card:hover .card-arrow{transform:translateX(4px);transition:transform .18s ease}

/* 返回与 CTA 带 */
.back-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.cta-band{position:relative;overflow:hidden;background:var(--brand);border-radius:20px;padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.cta-band::before{content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;border:2px solid rgba(255,255,255,.16);opacity:.6}
.cta-band::after{content:"";position:absolute;right:60px;bottom:-90px;width:200px;height:200px;border-radius:50%;border:2px solid rgba(255,255,255,.14);opacity:.5}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,26px);font-weight:700;position:relative;z-index:1}
.cta-band p{color:rgba(255,255,255,.86);margin:8px 0 0;font-size:15px;max-width:640px;position:relative;z-index:1}
.cta-band .btn{position:relative;z-index:1;flex:0 0 auto}
@media (max-width:768px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 20px}
  .cta-band .btn{width:100%}
}

/* 页脚 */
.site-footer{background:#0B1220;color:#B9C6DE;padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;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;gap:28px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-name{font-size:16px;font-weight:800;color:#fff}
.footer-text{font-size:14px;line-height:1.8;color:#97A6C2;margin:0}
.footer-domain{font-size:13px;color:#7E8EAC;margin:10px 0 0}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin:0 0 14px}
.footer-links{display:flex;flex-direction:column;gap:4px}
.footer-links a{font-size:14px;color:#B9C6DE;padding:6px 0;transition:color .18s ease}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:20px;font-size:13px;color:#8A99B6}
.to-top{color:#C9D4EA;font-weight:600}
.to-top:hover{color:#fff}

@media (min-width:1024px){
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px}
}

/* roulang page: category3 */
:root{
  --brand:#1F5BE0;
  --brand-dark:#16409F;
  --brand-hover:#1748BC;
  --brand-mist:#EEF3FF;
  --amber:#F2A63B;
  --amber-deep:#8A5A12;
  --amber-soft:rgba(242,166,59,.14);
  --coral:#FF5A5F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --title:#0B1220;
  --text:#41506B;
  --muted:#7A88A3;
  --line:#E6EBF5;
  --stroke:#E9EEF8;
  --stroke-strong:#D7DFF0;
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
  --sh-2:0 2px 6px rgba(11,18,32,.08), 0 18px 40px -18px rgba(11,18,32,.28);
  --sp-section:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.75;font-weight:400}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部信息条 */
.topbar{background:#0B1220;color:#C8D4EC;font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:16px;min-height:38px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
.topbar-inner::-webkit-scrollbar{display:none}
.topbar-domain{color:#fff;font-weight:600;letter-spacing:.02em}
.topbar-note{color:#8FA1C4}
.topbar-right{display:flex;gap:18px;margin-left:auto}
.topbar-right a{color:#C8D4EC;transition:color .18s}
.topbar-right a:hover{color:#fff}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s}
.site-header.is-stuck{box-shadow:0 8px 24px -16px rgba(11,18,32,.3)}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-name{font-size:17px;font-weight:800;color:var(--title);letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.main-nav a{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;border-radius:8px;font-size:15px;color:var(--text);white-space:nowrap;transition:color .18s,background .18s}
.main-nav a:hover{color:var(--brand);background:var(--brand-mist)}
.main-nav a.is-active{color:var(--brand-dark);font-weight:700}
.main-nav a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--brand);border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:10px;color:var(--title);transition:background .18s}
.nav-toggle:hover{background:var(--brand-mist)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:var(--r-sm);font-size:15px;font-weight:600;transition:background .18s,border-color .18s,transform .18s,box-shadow .18s,color .18s;border:1px solid transparent}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--stroke-strong)}
.btn-ghost:hover{background:#F3F7FF;border-color:var(--brand);transform:translateY(-1px)}
.btn-white{background:#fff;color:var(--brand);box-shadow:var(--sh-1)}
.btn-white:hover{background:#F3F7FF;transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.link-more{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.link-more:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(11,18,32,.4);opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;z-index:80}
.drawer{position:fixed;top:0;right:0;height:100%;width:82%;max-width:340px;background:#fff;z-index:90;transform:translateX(100%);transition:transform .24s ease;padding:20px;overflow-y:auto;box-shadow:-12px 0 32px -18px rgba(11,18,32,.4)}
body.drawer-open .drawer{transform:none}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;font-weight:800;color:var(--title)}
.drawer-close{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--title);border:1px solid var(--stroke)}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px}
.drawer-nav a{padding:12px 12px;border-radius:10px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);transition:background .18s,color .18s}
.drawer-nav a:hover{background:#F7FAFF;color:var(--brand)}
.drawer-nav a.is-active{color:var(--brand-dark);font-weight:700;background:var(--brand-mist)}

/* 页面头 */
.page-head{background:linear-gradient(180deg,#E9F0FF 0%,rgba(246,248,252,0) 100%);padding:28px 0 40px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.breadcrumb .sep{color:#C7D3E8}
.breadcrumb .current{color:var(--title);font-weight:600}
.pill{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;background:#fff;border:1px solid var(--stroke);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:16px}
.page-head h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
.page-head-sub{margin-top:14px;font-size:16px;color:var(--text);max-width:660px}
.page-head-meta{margin-top:16px;display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.page-head-meta b{color:var(--title);font-weight:700}

/* 区块 */
.section{padding:var(--sp-section) 0}
.section-tight{padding-top:0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.8vw,30px);font-weight:700}
.section-head p{margin-top:8px;font-size:15px;color:var(--muted);max-width:620px}
.card{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r-md);box-shadow:var(--sh-1);transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,91,224,.14)}

/* 导读卡 7:5 */
.guide{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center;background:#fff;border:1px solid var(--stroke);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1)}
.guide h2{font-size:clamp(23px,2.6vw,28px);margin-bottom:14px}
.guide p{font-size:16px;line-height:1.8;color:var(--text)}
.guide-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.guide-list li{display:flex;gap:10px;font-size:15px;color:var(--text)}
.guide-list li::before{content:"";flex:none;width:8px;height:8px;margin-top:9px;border-radius:50%;background:var(--brand);opacity:.8}
.guide-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);background:#F1F4FA}

/* 榜单 */
.rank-list{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.rank-row{display:grid;grid-template-columns:76px 72px 1fr auto;gap:20px;align-items:center;padding:22px 26px;border-bottom:1px solid var(--line);transition:background .18s}
.rank-row:last-child{border-bottom:0}
.rank-row:hover{background:#F7FAFF}
.rank-no{font-size:34px;font-weight:800;line-height:1;color:rgba(31,91,224,.22);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.rank-thumb{width:72px;height:72px;border-radius:var(--r-sm);object-fit:cover;background:#F1F4FA}
.rank-body h3{font-size:18px;font-weight:600;margin-bottom:6px}
.rank-body p{font-size:14px;color:var(--muted);line-height:1.7}
.rank-tail{display:flex;align-items:center;gap:14px;flex-shrink:0}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap}
.badge-brand{background:var(--brand-mist);color:var(--brand-dark)}
.badge-amber{background:var(--amber-soft);color:var(--amber-deep)}
.rank-arrow{color:var(--brand);font-size:18px;line-height:1;transition:transform .18s}
.rank-row:hover .rank-arrow{transform:translateX(4px)}

/* 对比卡 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-md);padding:26px}
.compare-card h3{font-size:19px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.compare-dot{width:10px;height:10px;border-radius:50%;flex:none}
.dot-blue{background:var(--brand)}
.dot-amber{background:var(--amber)}
.compare-card ol{display:flex;flex-direction:column;gap:12px;counter-reset:cp}
.compare-card ol li{position:relative;padding-left:30px;font-size:15px;color:var(--text);line-height:1.7}
.compare-card ol li::before{counter-increment:cp;content:counter(cp,decimal-leading-zero);position:absolute;left:0;top:0;font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums}
.compare-card.alt ol li::before{color:var(--amber-deep)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-sm);overflow:hidden;transition:border-color .18s,box-shadow .18s}
.faq-item.is-open{border-color:rgba(31,91,224,.24);box-shadow:var(--sh-1)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--title);min-height:56px}
.faq-icon{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--stroke-strong);display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:16px;line-height:1;transition:transform .18s,border-color .18s}
.faq-item.is-open .faq-icon{transform:rotate(180deg);border-color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* CTA */
.cta-band{position:relative;overflow:hidden;border-radius:20px;background:var(--brand-dark);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;color:#fff}
.cta-band::before{content:"";position:absolute;right:-70px;top:-90px;width:320px;height:320px;border:2px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none}
.cta-band::after{content:"";position:absolute;right:60px;bottom:-140px;width:260px;height:260px;border:2px dashed rgba(255,255,255,.12);border-radius:50%;pointer-events:none}
.cta-copy{position:relative;z-index:1;max-width:640px}
.cta-copy h2{color:#fff;font-size:clamp(22px,2.6vw,28px);margin-bottom:10px}
.cta-copy p{color:rgba(255,255,255,.82);font-size:15px}
.cta-band .btn{position:relative;z-index:1;flex-shrink:0}

/* 页脚 */
.site-footer{background:#0B1220;color:#B9C6DF;margin-top:80px;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-name{color:#fff;font-size:16px;font-weight:800;letter-spacing:.01em}
.footer-text{font-size:14px;line-height:1.8;color:#93A3C0}
.footer-domain{font-size:13px;color:#7FA8FF;margin-top:10px}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a{color:#B9C6DF;transition:color .18s}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:13px;color:#8296B6;flex-wrap:wrap}
.to-top{color:#C8D4EC}
.to-top:hover{color:#fff}

/* 滚动条 */
@media (min-width:1024px){
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px}
}

/* 响应式 */
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .nav-actions .btn-primary{display:none}
  .guide{grid-template-columns:1fr;gap:24px;padding:26px}
  .guide-media{order:-1}
  .rank-row{grid-template-columns:58px 72px 1fr;gap:16px;padding:20px}
  .rank-tail{grid-column:2 / -1;justify-content:flex-start;margin-top:4px}
  .footer-grid{grid-template-columns:1fr 1fr}
  :root{--sp-section:56px}
}
@media (max-width:767px){
  .container-x{padding:0 20px}
  .compare{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px}
  .cta-band .btn{width:100%}
  .rank-no{font-size:28px}
}
@media (max-width:639px){
  .container-x{padding:0 16px}
  :root{--sp-section:40px}
  .nav-inner{min-height:62px}
  .brand-name{font-size:15px}
  .rank-row{grid-template-columns:44px 56px 1fr;gap:12px;padding:18px 16px}
  .rank-thumb{width:56px;height:56px}
  .rank-body h3{font-size:16px}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:40px 0 20px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category2 */
:root{
  --brand:#1F5BE0;
  --brand-dark:#16409F;
  --brand-hover:#1748BC;
  --brand-soft:#EEF3FF;
  --amber:#F2A63B;
  --amber-deep:#9A6208;
  --coral:#FF5A5F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --title:#0B1220;
  --text:#41506B;
  --muted:#7A88A3;
  --line:#E6EBF5;
  --border:#E9EEF8;
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --pill:999px;
  --shadow:0 1px 2px rgba(11,18,32,.06),0 8px 24px -12px rgba(11,18,32,.18);
  --shadow-hover:0 2px 4px rgba(11,18,32,.08),0 16px 34px -16px rgba(11,18,32,.26);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:200;}
.skip-link:focus{left:0;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container-x{max-width:1280px;}}

/* ============ 顶部信息条 ============ */
.topbar{background:#0B1220;color:#C9D4E8;font-size:13px;}
.topbar-inner{
  width:100%;max-width:1200px;margin:0 auto;padding:0 24px;
  min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  overflow-x:auto;white-space:nowrap;
}
@media (min-width:1440px){.topbar-inner{max-width:1280px;}}
.topbar-left{display:flex;align-items:center;gap:12px;}
.topbar-domain{color:#fff;font-weight:700;letter-spacing:.03em;}
.topbar-tip{color:#8FA2C0;}
.topbar-right{display:flex;align-items:center;gap:18px;}
.topbar-right a{color:#C9D4E8;transition:color .16s ease;}
.topbar-right a:hover{color:#fff;}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 26px -18px rgba(11,18,32,.42);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;height:70px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-name{font-size:17px;font-weight:800;color:var(--title);letter-spacing:.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:2px;}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;height:42px;
  padding:0 12px;font-size:14.5px;font-weight:500;color:#33415C;
  border-radius:10px;transition:color .16s ease,background .16s ease;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft);}
.main-nav a.active{color:var(--brand);font-weight:700;}
.main-nav a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  border-radius:2px;background:var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;transition:.16s ease;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft);}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--title);border-radius:2px;position:relative;}
.nav-toggle span::before,
.nav-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--title);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .16s ease,background .16s ease,box-shadow .16s ease,border-color .16s ease,color .16s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow);}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#D7DFF0;}
.btn-ghost:hover{border-color:var(--brand);background:#F3F7FF;}
.btn-light{background:#fff;color:var(--brand);}
.btn-light:hover{background:#F0F5FF;transform:translateY(-1px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.12);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.text-link{color:var(--brand);font-weight:600;font-size:14px;position:relative;}
.text-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.text-link:hover::after{transform:scaleX(1);}

/* ============ 移动端抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,18,32,.4);z-index:120;opacity:0;
  transition:opacity .22s ease;
}
.drawer-mask.show{opacity:1;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;background:#fff;z-index:130;
  transform:translateX(102%);transition:transform .26s ease;display:flex;flex-direction:column;
  padding:20px;overflow-y:auto;box-shadow:-18px 0 40px -24px rgba(11,18,32,.4);
}
.drawer.show{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-head span{font-size:15px;font-weight:800;color:var(--title);}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:#fff;font-size:20px;line-height:1;cursor:pointer;}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:16px 0;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;min-height:46px;padding:0 12px;
  border-radius:12px;font-size:15px;font-weight:500;color:#33415C;transition:.16s ease;
}
.drawer-nav a:hover{background:var(--brand-soft);color:var(--brand);}
.drawer-nav a.active{background:var(--brand-soft);color:var(--brand);font-weight:700;}
.drawer-cta{width:100%;margin-top:6px;}
.drawer-meta{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.8;}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);padding:20px 0 4px;}
.breadcrumb a{transition:color .16s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#B9C4D8;}
.breadcrumb .now{color:var(--text);font-weight:600;}

/* ============ 分类页头 ============ */
.cat-hero{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--line);}
.cat-hero::before{
  content:"";position:absolute;width:520px;height:520px;right:-180px;top:-240px;
  border:1.5px solid rgba(31,91,224,.10);border-radius:50%;pointer-events:none;
}
.cat-hero::after{
  content:"";position:absolute;width:780px;height:780px;right:-340px;top:-390px;
  border:1.5px solid rgba(31,91,224,.06);border-radius:50%;pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:2;padding:36px 0 44px;}
.pill-label{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
  border-radius:var(--pill);background:var(--brand-soft);color:var(--brand);
  font-size:13px;font-weight:600;
}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.2;font-weight:800;letter-spacing:-.01em;
  margin:16px 0 12px;
}
.cat-hero .lead{font-size:16px;color:var(--text);max-width:720px;}
.cat-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);}
.cat-stat{font-size:13px;color:var(--muted);}
.cat-stat strong{
  display:block;font-size:20px;font-weight:800;color:var(--title);
  font-variant-numeric:tabular-nums;line-height:1.4;
}

/* ============ 板块 ============ */
.section{padding:80px 0;}
.section-tight{padding:56px 0;}
.section-head{margin-bottom:24px;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;}
.section-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:760px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}

/* ============ 卡片 ============ */
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--shadow);overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(31,91,224,.12);}
.card-media{position:relative;aspect-ratio:16/9;background:#F1F4FA;border-radius:var(--r-md) var(--r-md) 0 0;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:22px;}
.card-body h3{font-size:18px;line-height:1.45;font-weight:600;}
.card-body p{margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--muted);}

/* ============ 徽章 ============ */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--pill);font-size:12.5px;font-weight:600;letter-spacing:.01em;}
.badge-brand{background:rgba(31,91,224,.08);color:var(--brand);}
.badge-amber{background:rgba(242,166,59,.14);color:var(--amber-deep);}

.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

/* ============ 导读卡（7:5） ============ */
.guide-card{
  display:grid;grid-template-columns:7fr 5fr;gap:0;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--shadow);overflow:hidden;
}
.guide-text{padding:36px;}
.guide-text h2{font-size:clamp(20px,2.3vw,26px);line-height:1.35;}
.guide-text p{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--text);}
.guide-points{display:flex;flex-direction:column;gap:12px;margin-top:22px;}
.guide-point{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text);}
.guide-point i{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-style:normal;margin-top:3px;
}
.guide-media{position:relative;background:#F1F4FA;min-height:280px;}
.guide-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}

/* ============ 两列大卡条目区 ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.entry-card .card-body{padding:24px;}
.entry-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;}
.entry-meta{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* ============ 要点 / 注意事项 ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:26px;}
.compare-card h3{font-size:18px;font-weight:600;display:flex;align-items:center;gap:10px;}
.compare-card h3 em{
  font-style:normal;width:28px;height:28px;border-radius:10px;display:inline-flex;
  align-items:center;justify-content:center;font-size:13px;font-weight:700;
  background:var(--brand-soft);color:var(--brand);
}
.compare-card.alt h3 em{background:rgba(242,166,59,.16);color:var(--amber-deep);}
.compare-list{margin-top:18px;display:flex;flex-direction:column;}
.compare-list li{
  display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);
  font-size:14.8px;line-height:1.7;color:var(--text);
}
.compare-list li:first-child{border-top:0;padding-top:6px;}
.compare-list li span{
  flex:0 0 auto;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
  font-size:13.5px;padding-top:2px;
}
.compare-card.alt .compare-list li span{color:var(--amber-deep);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden;transition:border-color .18s ease;}
.faq-item:hover{border-color:rgba(31,91,224,.22);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--title);cursor:pointer;min-height:44px;
}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid #D7DFF0;
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  transition:transform .18s ease,border-color .18s ease;
}
.faq-icon svg{width:12px;height:12px;}
.faq-item.open .faq-icon{transform:rotate(180deg);border-color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-item.open .faq-a{max-height:340px;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted);}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--brand);border-radius:20px;
  padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  color:#fff;
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;right:-140px;top:-200px;
  border:1.5px solid rgba(255,255,255,.18);border-radius:50%;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;width:620px;height:620px;right:-240px;top:-300px;
  border:1.5px solid rgba(255,255,255,.10);border-radius:50%;pointer-events:none;
}
.cta-band-inner{position:relative;z-index:2;}
.cta-band h2{color:#fff;font-size:clamp(20px,2.4vw,26px);line-height:1.4;}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.86);max-width:600px;}
.cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{background:#0B1220;color:#9FB0CC;padding:56px 0 0;margin-top:80px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand-name{color:#fff;font-size:16px;font-weight:700;}
.footer-text{font-size:14px;line-height:1.8;color:#8798B5;margin:0 0 10px;}
.footer-domain{font-size:13px;color:#6F82A3;margin:0;font-variant-numeric:tabular-nums;}
.footer-title{font-size:15px;color:#fff;font-weight:600;margin:0 0 14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#9FB0CC;transition:color .16s ease;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  margin-top:40px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;font-size:13px;color:#7D8EAD;flex-wrap:wrap;
}
.to-top{color:#C9D4E8;transition:color .16s ease;}
.to-top:hover{color:#fff;}
.mt-3{margin-top:12px;}

/* ============ 滚动条 ============ */
@media (min-width:1024px){
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px;}
  ::-webkit-scrollbar-track{background:transparent;}
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .main-nav a{padding:0 9px;font-size:14px;}
  .nav-actions .btn{display:none;}
}
@media (max-width:1023px){
  .container-x{padding:0 20px;}
  .topbar-inner{padding:0 20px;}
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .guide-card{grid-template-columns:1fr;}
  .guide-media{min-height:240px;position:relative;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
  .cta-actions{width:100%;flex-wrap:wrap;}
}
@media (max-width:767px){
  .grid-2{grid-template-columns:1fr;gap:20px;}
  .compare{grid-template-columns:1fr;gap:20px;}
  .cat-hero-inner{padding:28px 0 36px;}
  .guide-text{padding:26px;}
  .card-body{padding:20px;}
  .compare-card{padding:20px;}
}
@media (max-width:639px){
  .container-x{padding:0 16px;}
  .topbar-inner{padding:0 16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .section{padding:40px 0;}
  .section-tight{padding:32px 0;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-band{padding:26px;border-radius:16px;}
  .cta-actions .btn{width:100%;}
  .cat-stats{gap:20px;}
}

/* roulang page: category4 */
:root{
  --brand:#1F5BE0;
  --brand-deep:#16409F;
  --brand-mist:#EEF3FF;
  --brand-hover:#1748BC;
  --amber:#F2A63B;
  --amber-deep:#A96A05;
  --amber-soft:rgba(242,166,59,.12);
  --coral:#FF5A5F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --title:#0B1220;
  --text:#41506B;
  --muted:#7A88A3;
  --line:#E6EBF5;
  --stroke:#E9EEF8;
  --input:#D7DFF0;
  --r-xl:24px;
  --r-lg:16px;
  --r-sm:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
  --sh-2:0 2px 6px rgba(11,18,32,.08), 0 18px 36px -16px rgba(11,18,32,.26);
  --sec:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-weight:400;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container-x{max-width:1280px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:#0B1220;color:#B9C6DE;font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:40px}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.topbar-domain{color:#FFFFFF;font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums}
.topbar-note{color:#8B9BB8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-right a{color:#C9D6EE;transition:color .16s ease}
.topbar-right a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ---------- 主导航 ---------- */
.main-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.main-header.is-stuck{box-shadow:0 6px 20px -14px rgba(11,18,32,.4)}
.nav-inner{display:flex;align-items:center;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:36px;height:36px;flex:0 0 auto}
.brand-name{font-size:17px;font-weight:800;color:var(--title);letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.main-nav a{position:relative;display:inline-block;padding:8px 10px;font-size:15px;color:var(--text);border-radius:8px;white-space:nowrap;transition:color .16s ease,background-color .16s ease}
.main-nav a:hover{color:var(--brand);background:var(--brand-mist)}
.main-nav a.active{color:var(--title);font-weight:700}
.main-nav a.active::after{content:"";position:absolute;left:10px;right:10px;bottom:-4px;height:2px;background:var(--brand);border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{display:none;width:46px;height:46px;align-items:center;justify-content:center;border:1px solid var(--stroke);background:#fff;border-radius:var(--r-sm);cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--title);border-radius:2px;position:relative;transition:.2s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--title);border-radius:2px;transition:.2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:var(--r-sm);font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background-color .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease,transform .16s ease;white-space:nowrap}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:var(--r-sm)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--input)}
.btn-ghost:hover{border-color:var(--brand);background:#F3F7FF}
.btn-block{width:100%}
.btn-light{background:#fff;color:var(--brand)}
.btn-light:hover{background:#F3F7FF;transform:translateY(-1px)}
.link-arrow{color:var(--brand);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:13px;font-weight:600;line-height:1.6}
.badge-brand{background:rgba(31,91,224,.08);color:var(--brand)}
.badge-amber{background:var(--amber-soft);color:var(--amber-deep)}
.badge-line{background:#fff;border:1px solid var(--stroke);color:var(--muted);font-weight:500}

/* ---------- 面包屑 ---------- */
.crumb{padding:20px 0 0}
.crumb-list{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.crumb-list a{color:var(--muted);transition:color .16s ease}
.crumb-list a:hover{color:var(--brand)}
.crumb-sep{color:#C3CDE0}

/* ---------- 分类页头 ---------- */
.page-head{padding:28px 0 8px}
.page-head-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.page-title{font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
.page-sub{margin-top:10px;font-size:16px;color:var(--muted);max-width:620px}
.page-stat{display:flex;align-items:center;gap:18px;font-size:13px;color:var(--muted);padding:10px 16px;background:#fff;border:1px solid var(--stroke);border-radius:var(--r-sm)}
.page-stat b{color:var(--title);font-size:15px;font-variant-numeric:tabular-nums}

/* ---------- 板块 ---------- */
.section{padding-top:var(--sec)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.section-title{font-size:clamp(24px,3vw,30px);font-weight:700;letter-spacing:-.01em}
.section-desc{margin-top:8px;font-size:15px;color:var(--muted);max-width:640px}
.section-more{font-size:14px;font-weight:600;color:var(--brand)}
.section-more:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ---------- 导读卡 ---------- */
.lead-card{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center;background:#fff;border:1px solid var(--stroke);border-radius:var(--r-xl);padding:28px;box-shadow:var(--sh-1)}
.lead-card h2{font-size:24px;font-weight:700;margin-bottom:12px}
.lead-card p{font-size:16px;line-height:1.8}
.lead-points{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px}
.lead-media{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;background:#F1F4FA}
.lead-media img{width:100%;height:100%;object-fit:cover}

/* ---------- 图文左右交替 ---------- */
.alt-list{display:flex;flex-direction:column;gap:32px}
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;background:#fff;border:1px solid var(--stroke);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.alt-row:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,91,224,.12)}
.alt-row.reverse .alt-media{order:2}
.alt-media{position:relative;border-radius:var(--r-sm);overflow:hidden;aspect-ratio:16/9;background:#F1F4FA}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.alt-row:hover .alt-media img{transform:scale(1.03)}
.alt-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.alt-body p{font-size:15px;line-height:1.8;color:var(--text)}
.alt-tip{margin-top:14px;display:flex;gap:10px;align-items:flex-start;padding:10px 14px;background:var(--brand-mist);border-radius:var(--r-sm);font-size:14px;color:#2C4270}
.alt-tip::before{content:"";flex:0 0 auto;width:4px;align-self:stretch;min-height:18px;background:var(--amber);border-radius:2px}
.alt-index{display:inline-flex;align-items:center;justify-content:center;height:26px;min-width:38px;padding:0 10px;border-radius:var(--r-pill);background:rgba(31,91,224,.08);color:var(--brand);font-size:13px;font-weight:700;margin-bottom:12px;font-variant-numeric:tabular-nums}

/* ---------- 两栏说明卡 ---------- */
.pair-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pair-card{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-lg);padding:24px}
.pair-card h3{font-size:18px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.pair-card h3::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--brand)}
.pair-card.amber h3::before{background:var(--amber)}
.pair-list li{position:relative;padding-left:26px;font-size:15px;line-height:1.8;margin-bottom:12px}
.pair-list li:last-child{margin-bottom:0}
.pair-list li::before{content:"";position:absolute;left:6px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.pair-card.amber .pair-list li::before{background:var(--amber)}
.pair-list li b{color:var(--title)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--stroke);border-radius:var(--r-sm);overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item.open{border-color:rgba(31,91,224,.2);box-shadow:var(--sh-1)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--title);cursor:pointer;line-height:1.6}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--input);position:relative;transition:transform .18s ease,border-color .18s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;transform:translate(-50%,-50%)}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px;transition:opacity .18s ease}
.faq-item.open .faq-icon{border-color:var(--brand);transform:rotate(180deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--brand-deep);border-radius:20px;padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;color:#fff}
.cta-band::before{content:"";position:absolute;right:-80px;top:-90px;width:320px;height:320px;border:2px solid rgba(255,255,255,.16);border-radius:50%;pointer-events:none}
.cta-band::after{content:"";position:absolute;right:70px;bottom:-140px;width:260px;height:260px;border:2px dashed rgba(242,166,59,.28);border-radius:50%;pointer-events:none}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,28px);font-weight:700;position:relative}
.cta-band p{margin-top:10px;font-size:15px;color:#C9D9F6;max-width:620px;position:relative}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative}

/* ---------- 抽屉 ---------- */
.drawer{position:fixed;top:0;right:0;width:82%;max-width:360px;height:100%;background:#fff;z-index:90;transform:translateX(102%);transition:transform .24s ease;padding:22px 20px;overflow-y:auto;box-shadow:-12px 0 40px -20px rgba(11,18,32,.4)}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;font-weight:700;color:var(--title)}
.drawer-close{width:44px;height:44px;border:1px solid var(--stroke);background:#fff;border-radius:var(--r-sm);cursor:pointer;font-size:18px;color:var(--title);line-height:1}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{padding:12px 12px;border-radius:var(--r-sm);font-size:15px;color:var(--text);transition:background-color .16s ease,color .16s ease}
.drawer-nav a:hover{background:var(--brand-mist);color:var(--brand)}
.drawer-nav a.active{background:var(--brand-mist);color:var(--brand);font-weight:700}
.drawer-foot{border-top:1px solid var(--line);padding-top:16px;font-size:14px;color:var(--muted);line-height:1.9}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);opacity:0;visibility:hidden;transition:opacity .22s ease;z-index:80}
.overlay.open{opacity:1;visibility:visible}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:var(--sec);background:#0B1220;color:#93A3BF;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-name{font-size:17px;font-weight:800;color:#fff}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-text{font-size:14px;line-height:1.9;color:#8A9AB6}
.footer-domain{margin-top:10px;font-size:13px;color:#6E7E9A;font-variant-numeric:tabular-nums}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:#A9B7D0;transition:color .16s ease}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
.footer-bottom{margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.09);display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:#7E8EA9;flex-wrap:wrap}
.to-top{color:#A9B7D0}
.to-top:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}

/* ---------- 滚动条 ---------- */
@media (min-width:1024px){
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px;border:2px solid var(--bg)}
  ::-webkit-scrollbar-thumb:hover{background:#AEBEDC}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container-x{padding:0 24px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions .btn{display:none}
  .nav-inner{justify-content:space-between;height:64px}
  :root{--sec:56px}
  .lead-card{grid-template-columns:1fr;gap:22px}
  .lead-media{order:-1;aspect-ratio:16/9}
  .alt-row{grid-template-columns:1fr;gap:20px}
  .alt-row.reverse .alt-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 26px}
}
@media (max-width:767px){
  .topbar-inner{overflow-x:auto;scrollbar-width:none}
  .topbar-inner::-webkit-scrollbar{display:none}
  .topbar-note{display:none}
  .pair-grid{grid-template-columns:1fr}
  .page-head-top{flex-direction:column;align-items:flex-start;gap:16px}
  .page-stat{width:100%;justify-content:space-between}
}
@media (max-width:639px){
  :root{--sec:40px}
  .container-x{padding:0 16px}
  .alt-row{padding:18px}
  .footer-grid{grid-template-columns:1fr}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
}

/* roulang page: category5 */
:root{
  --brand:#1F5BE0;
  --brand-dark:#16409F;
  --brand-hover:#1748BC;
  --mist:#EEF3FF;
  --amber:#F2A63B;
  --amber-deep:#B36F12;
  --coral:#FF5A5F;
  --page:#F6F8FC;
  --card:#FFFFFF;
  --title:#0B1220;
  --text:#41506B;
  --muted:#7A88A3;
  --line:#E6EBF5;
  --stroke:#E9EEF8;
  --stroke-strong:#D7DFF0;
  --r-kv:24px;
  --r-card:16px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
  --sh-2:0 2px 4px rgba(11,18,32,.07), 0 18px 40px -16px rgba(11,18,32,.24);
  --sec:80px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--page);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){
  .container-x{max-width:1280px;}
}
@media (max-width:1023px){
  .container-x{padding-left:20px;padding-right:20px;}
}
@media (max-width:639px){
  .container-x{padding-left:16px;padding-right:16px;}
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:#0B1220;
  min-height:38px;
  display:flex;
  align-items:center;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
}
.topbar-left{
  display:flex;
  align-items:center;
  gap:12px;
  color:#AEB9CE;
  font-size:13px;
  white-space:nowrap;
}
.topbar-domain{
  color:#fff;
  font-weight:600;
  letter-spacing:.02em;
}
.topbar-note{
  color:#8C99B2;
  border-left:1px solid rgba(255,255,255,.14);
  padding-left:12px;
}
.topbar-right{
  display:flex;
  align-items:center;
  gap:18px;
  font-size:13px;
  white-space:nowrap;
  overflow-x:auto;
  scrollbar-width:none;
}
.topbar-right::-webkit-scrollbar{display:none;}
.topbar-right a{
  color:#C8D2E6;
  padding:4px 0;
  transition:color .18s ease;
}
.topbar-right a:hover{color:#fff;}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
}
.navbar{
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled .navbar{
  box-shadow:0 8px 24px -16px rgba(11,18,32,.28), 0 1px 0 var(--line);
}
.navbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:70px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-name{
  font-size:17px;
  font-weight:800;
  color:var(--title);
  letter-spacing:.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex-wrap:nowrap;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 12px;
  border-radius:8px;
  font-size:15px;
  color:var(--text);
  white-space:nowrap;
  transition:color .18s ease, background-color .18s ease;
}
.nav-link:hover{
  color:var(--brand);
  background:var(--mist);
}
.nav-link.active{
  color:var(--brand);
  font-weight:700;
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}
.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.hamburger{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--stroke);
  border-radius:12px;
  background:#fff;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.hamburger span{
  display:block;
  width:22px;
  height:2px;
  border-radius:2px;
  background:var(--title);
}
.hamburger:hover{border-color:var(--brand);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 20px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  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-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-primary{
  background:var(--brand);
  color:#fff;
  box-shadow:var(--sh-1);
}
.btn-primary:hover{
  background:var(--brand-hover);
  transform:translateY(-1px);
  box-shadow:var(--sh-2);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:#fff;
  color:var(--brand);
  border-color:var(--stroke-strong);
}
.btn-ghost:hover{
  border-color:var(--brand);
  background:#F3F7FF;
  transform:translateY(-1px);
}
.btn-on-dark{
  background:#fff;
  color:var(--brand);
}
.btn-on-dark:hover{
  background:#F3F7FF;
  transform:translateY(-1px);
}
.btn:focus-visible,
.nav-link:focus-visible,
.hamburger:focus-visible,
.faq-q:focus-visible,
a:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:10px;
}
.text-link{
  color:var(--brand);
  font-size:14px;
  font-weight:600;
  border-bottom:2px solid transparent;
  padding-bottom:2px;
  transition:border-color .18s ease;
}
.text-link:hover{border-color:var(--brand);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  background:rgba(31,91,224,.08);
  color:var(--brand);
}
.badge-amber{
  background:rgba(242,166,59,.14);
  color:var(--amber-deep);
}
.badge-plain{
  background:#F2F5FB;
  color:var(--muted);
}
.badge-coral{
  background:rgba(255,90,95,.1);
  color:#C93B3F;
}
.pill-tag{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:var(--mist);
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  border:1px solid rgba(31,91,224,.14);
}

/* ---------- 面包屑 ---------- */
.crumbs{
  padding:18px 0 0;
}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs a{color:var(--muted);transition:color .18s ease;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#C3CCDD;}
.crumbs .current{color:var(--title);font-weight:600;}

/* ---------- 通用区块 ---------- */
.section{padding-top:var(--sec);}
.section-tight{padding-top:56px;}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:24px;
}
.sec-title{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.3;
  font-weight:700;
  color:var(--title);
}
.sec-sub{
  margin-top:8px;
  font-size:15px;
  color:var(--muted);
}
.card{
  background:var(--card);
  border:1px solid var(--stroke);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:rgba(31,91,224,.18);
}

/* ---------- 分类页头 ---------- */
.page-head{
  padding-top:26px;
  display:grid;
  grid-template-columns:8fr 4fr;
  gap:32px;
  align-items:end;
}
.page-head h1{
  font-size:clamp(30px,4.4vw,48px);
  line-height:1.2;
  font-weight:800;
  color:var(--title);
  letter-spacing:-.01em;
}
.page-head .lead{
  margin-top:14px;
  font-size:16px;
  color:var(--text);
  max-width:620px;
}
.head-stat{
  text-align:right;
  font-size:13px;
  color:var(--muted);
  line-height:1.9;
}
.head-stat .num-strong{
  display:block;
  font-size:26px;
  font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
}

/* ---------- 导读卡 ---------- */
.guide{
  margin-top:32px;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:0;
  overflow:hidden;
  border-radius:var(--r-kv);
  background:#fff;
  border:1px solid var(--stroke);
  box-shadow:var(--sh-1);
}
.guide-body{
  padding:36px 34px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:16px;
}
.guide-body h2{
  font-size:clamp(20px,2.2vw,27px);
  line-height:1.35;
  font-weight:700;
  color:var(--title);
}
.guide-body p{font-size:15.5px;color:var(--text);}
.guide-list{display:flex;flex-direction:column;gap:10px;margin-top:4px;}
.guide-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  color:var(--text);
}
.guide-list li::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-top:10px;
  border-radius:50%;
  background:var(--amber);
}
.guide-media{
  position:relative;
  min-height:300px;
  background:#F1F4FA;
}
.guide-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/11;
}

/* ---------- 紧凑三列小卡 ---------- */
.tight-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.tight-card{
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:14px;
  overflow:hidden;
  padding:16px;
  box-shadow:0 1px 2px rgba(11,18,32,.05);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.tight-card:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 30px -18px rgba(11,18,32,.28);
  border-color:rgba(31,91,224,.22);
}
.tight-thumb{
  border-radius:10px;
  overflow:hidden;
  background:#F1F4FA;
  aspect-ratio:16/9;
}
.tight-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.tight-card:hover .tight-thumb img{transform:scale(1.03);}
.tight-card h3{
  font-size:15.5px;
  line-height:1.5;
  font-weight:600;
  color:var(--title);
}
.tight-card p{
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tight-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  margin-top:auto;
  padding-top:10px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--muted);
}

/* ---------- 两栏对比卡 ---------- */
.rule-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.rule-card{
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:var(--r-card);
  padding:26px 24px;
}
.rule-card h3{
  font-size:19px;
  font-weight:700;
  color:var(--title);
  margin-bottom:14px;
}
.rule-card ol{
  counter-reset:rule;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.rule-card ol li{
  counter-increment:rule;
  position:relative;
  padding-left:34px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--text);
}
.rule-card ol li::before{
  content:counter(rule,decimal-leading-zero);
  position:absolute;
  left:0;
  top:1px;
  width:24px;
  height:24px;
  border-radius:999px;
  background:var(--mist);
  color:var(--brand);
  font-size:12px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  font-variant-numeric:tabular-nums;
}
.rule-card.alt ol li::before{
  background:rgba(242,166,59,.16);
  color:var(--amber-deep);
}

/* ---------- FAQ ---------- */
.faq-wrap{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.faq-item:hover{border-color:rgba(31,91,224,.22);}
.faq-item.open{box-shadow:var(--sh-1);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--title);
  cursor:pointer;
  min-height:44px;
}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:24px;
  height:24px;
  border-radius:999px;
  border:1px solid var(--stroke-strong);
  transition:transform .18s ease, border-color .18s ease;
}
.faq-icon i{
  position:absolute;
  left:50%;
  top:50%;
  background:var(--brand);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon .bar-h{width:11px;height:2px;}
.faq-icon .bar-v{width:2px;height:11px;transition:opacity .18s ease;}
.faq-item.open .faq-icon{transform:rotate(180deg);border-color:var(--brand);}
.faq-item.open .faq-icon .bar-v{opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .18s ease;
}
.faq-a p{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  background:linear-gradient(120deg,#1F5BE0 0%,#16409F 100%);
  padding:40px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  color:#fff;
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-90px;
  top:-90px;
  width:340px;
  height:340px;
  border-radius:50%;
  border:2px solid rgba(255,255,255,.16);
  pointer-events:none;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:60px;
  bottom:-140px;
  width:280px;
  height:280px;
  border-radius:50%;
  border:2px solid rgba(255,255,255,.12);
  pointer-events:none;
}
.cta-band h2{
  font-size:clamp(20px,2.2vw,27px);
  font-weight:700;
  line-height:1.35;
  position:relative;
  z-index:1;
}
.cta-band p{
  margin-top:10px;
  font-size:14.5px;
  color:rgba(255,255,255,.82);
  max-width:560px;
  position:relative;
  z-index:1;
}
.cta-actions{
  position:relative;
  z-index:1;
  display:flex;
  gap:12px;
  flex-shrink:0;
}
.btn-outline-light{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.5);
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.12);
  border-color:#fff;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec);
  background:#0B1220;
  color:#AEB9CE;
  padding-top:56px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
}
.footer-brand-name{
  font-size:16px;
  font-weight:800;
  color:#fff;
}
.footer-text{
  margin-top:12px;
  font-size:13.5px;
  line-height:1.8;
  color:#8C99B2;
}
.footer-domain{
  margin-top:10px;
  font-size:13px;
  color:#6F7D96;
}
.footer-title{
  font-size:14px;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  font-size:14px;
  color:#AEB9CE;
  transition:color .18s ease, transform .18s ease;
}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:#7A88A3;
}
.to-top{
  color:#C8D2E6;
  transition:color .18s ease;
}
.to-top:hover{color:#fff;}

/* ---------- 移动端抽屉 ---------- */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(11,18,32,.4);
  opacity:0;
  visibility:hidden;
  transition:opacity .22s ease, visibility .22s ease;
  z-index:80;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:82%;
  max-width:360px;
  background:#fff;
  transform:translateX(100%);
  transition:transform .26s ease;
  z-index:90;
  display:flex;
  flex-direction:column;
  padding:20px;
  overflow-y:auto;
}
.drawer.show{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  width:44px;
  height:44px;
  border:1px solid var(--stroke);
  border-radius:12px;
  background:#fff;
  font-size:20px;
  color:var(--title);
  cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-nav{
  display:flex;
  flex-direction:column;
  padding:14px 0;
  gap:2px;
}
.drawer-nav a{
  display:flex;
  align-items:center;
  min-height:46px;
  padding:0 12px;
  border-radius:10px;
  font-size:15px;
  color:var(--text);
  transition:background-color .18s ease, color .18s ease;
}
.drawer-nav a:hover{background:var(--mist);color:var(--brand);}
.drawer-nav a.active{color:var(--brand);font-weight:700;background:var(--mist);}
.drawer-cta{margin-top:auto;padding-top:18px;display:flex;flex-direction:column;gap:10px;}
.drawer-contact{
  font-size:13px;
  color:var(--muted);
  line-height:1.8;
  padding-top:12px;
  border-top:1px solid var(--line);
  margin-top:14px;
}

/* ---------- 滚动条 ---------- */
@media (min-width:1024px){
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:transparent;}
  ::-webkit-scrollbar-thumb{background:#C7D3E8;border-radius:999px;border:2px solid transparent;background-clip:padding-box;}
  ::-webkit-scrollbar-thumb:hover{background:#AFBFDB;background-clip:padding-box;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sec:72px;}
}
@media (max-width:1023px){
  :root{--sec:56px;}
  .main-nav{display:none;}
  .hamburger{display:inline-flex;}
  .page-head{grid-template-columns:1fr;gap:16px;align-items:start;}
  .head-stat{text-align:left;}
  .guide{grid-template-columns:1fr;}
  .guide-media{min-height:240px;order:-1;}
  .tight-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rule-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px;}
  .cta-actions{width:100%;}
}
@media (max-width:639px){
  :root{--sec:40px;}
  body{font-size:15.5px;}
  .topbar-note{display:none;}
  .navbar-inner{height:62px;gap:12px;}
  .brand-name{font-size:15px;}
  .nav-actions .btn{display:none;}
  .page-head h1{font-size:clamp(26px,7vw,34px);}
  .guide-body{padding:24px 20px;}
  .tight-grid{grid-template-columns:1fr;gap:14px;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}