/* roulang page: index */
:root{
    --brand:#1A66E0;
    --brand-weak:#E8F0FE;
    --accent:#FF7A3C;
    --teal:#12B3A6;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --ink:#0E1B2E;
    --ink-2:#5A6B85;
    --line:#E4E9F2;
    --radius-sm:10px;
    --radius:16px;
    --radius-lg:24px;
    --shadow:0 2px 8px rgba(16,40,80,.06);
    --shadow-hover:0 12px 32px rgba(16,40,80,.12);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.75;
    letter-spacing:.01em;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,select,textarea{font:inherit;color:inherit;}
  button{cursor:pointer;border:none;background:none;}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
  @media (min-width:640px){.container{padding-left:24px;padding-right:24px;}}

  /* 导航 */
  .site-header{position:sticky;top:12px;z-index:60;padding:0 16px;}
  .nav-shell{
    max-width:1200px;margin:0 auto;height:66px;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:0 12px 0 20px;
    background:rgba(255,255,255,.82);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border:1px solid var(--line);
    border-radius:999px;
    box-shadow:var(--shadow);
  }
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:.01em;white-space:nowrap;}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;flex:0 0 auto;
    background:linear-gradient(135deg,var(--brand) 0%,#4A8BF0 100%);
    color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  }
  .brand-text{max-width:220px;overflow:hidden;text-overflow:ellipsis;}
  .nav-menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
  .nav-menu a{
    display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:999px;
    font-size:14.5px;color:var(--ink-2);transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-menu a:hover{background:var(--brand-weak);color:var(--brand);}
  .nav-menu a.active{background:var(--brand);color:#fff;font-weight:600;}
  .nav-cta{
    display:inline-flex;align-items:center;gap:6px;height:42px;padding:0 20px;border-radius:999px;
    background:var(--accent);color:#fff;font-size:14.5px;font-weight:600;
    box-shadow:0 6px 16px rgba(255,122,60,.28);transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  }
  .nav-cta:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,60,.32);}
  .nav-cta:active{transform:scale(.98);}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
    align-items:center;justify-content:center;background:#fff;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;}
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}
  .mobile-panel{
    display:none;max-width:1200px;margin:10px auto 0;background:#fff;border:1px solid var(--line);
    border-radius:20px;box-shadow:var(--shadow-hover);padding:10px;list-style:none;
  }
  .mobile-panel.open{display:block;}
  .mobile-panel a{display:flex;align-items:center;height:44px;padding:0 14px;border-radius:14px;font-size:15px;color:var(--ink-2);}
  .mobile-panel a:hover,.mobile-panel a.active{background:var(--brand-weak);color:var(--brand);font-weight:600;}

  /* 通用板块与标题 */
  .section{padding-top:64px;padding-bottom:64px;}
  @media (min-width:768px){.section{padding-top:80px;padding-bottom:80px;}}
  @media (min-width:1024px){.section{padding-top:96px;padding-bottom:96px;}}
  .section-head{max-width:720px;margin-bottom:36px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
    background:var(--brand-weak);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:14px;
  }
  h1,h2,h3,h4{margin:0;line-height:1.3;}
  h1{font-size:clamp(28px,5vw,46px);font-weight:700;line-height:1.2;letter-spacing:-.01em;}
  h2{font-size:clamp(22px,3vw,32px);font-weight:700;}
  h3{font-size:19px;font-weight:600;}
  .lead{color:var(--ink-2);font-size:16.5px;margin-top:14px;}
  .mark{position:relative;white-space:nowrap;}
  .mark::after{
    content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;border-radius:6px;
    background:rgba(255,122,60,.22);z-index:-1;
  }

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;height:50px;padding:0 26px;
    border-radius:999px;font-size:15.5px;font-weight:600;transition:all .2s ease-out;
  }
  .btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,60,.28);}
  .btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.32);}
  .btn-primary:active{transform:scale(.98);}
  .btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);}
  .btn-ghost:hover{background:var(--brand-weak);transform:translateY(-2px);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-sm{height:42px;padding:0 20px;font-size:14.5px;}

  /* Hero */
  .hero{padding-top:40px;padding-bottom:56px;position:relative;overflow:hidden;}
  .hero::before{
    content:"";position:absolute;top:-160px;left:-120px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(26,102,224,.10) 0%,rgba(26,102,224,0) 70%);
  }
  .hero-grid{position:relative;display:grid;gap:36px;align-items:center;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .hero-note{font-size:13.5px;color:var(--ink-2);margin-top:16px;}
  .trust-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:36px;padding-top:26px;border-top:1px solid var(--line);}
  .trust-item{display:flex;flex-direction:column;gap:2px;}
  .trust-num{font-size:20px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;}
  .trust-label{font-size:12.5px;color:var(--ink-2);}
  .hero-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-hover);}
  .hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
  .hero-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(255,255,255,.06) 0%,rgba(14,27,46,.18) 100%);
  }
  .hero-badge{
    position:absolute;left:18px;bottom:18px;z-index:2;background:rgba(255,255,255,.94);
    border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);font-size:13.5px;color:var(--ink);
  }
  @media (min-width:1024px){
    .hero{padding-top:56px;padding-bottom:72px;}
    .hero-grid{grid-template-columns:7fr 5fr;gap:48px;}
  }

  /* 痛点卡 */
  .grid-2{display:grid;gap:16px;grid-template-columns:1fr;}
  @media (min-width:768px){.grid-2{grid-template-columns:repeat(2,1fr);gap:24px;}}
  @media (min-width:1024px){.grid-2.lg-4{grid-template-columns:repeat(4,1fr);}}
  .pain-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    padding:24px;box-shadow:var(--shadow);transition:all .2s ease-out;
  }
  .pain-card:hover{border-color:var(--brand);transform:translateY(-4px);box-shadow:var(--shadow-hover);}
  .pain-num{
    width:40px;height:40px;border-radius:12px;background:var(--brand-weak);color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;margin-bottom:16px;
  }
  .pain-card h3{margin-bottom:8px;}
  .pain-card p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.7;}

  /* 方案卡 */
  .plan-grid{display:grid;gap:20px;grid-template-columns:1fr;}
  @media (min-width:1024px){
    .plan-grid{grid-template-columns:repeat(3,1fr);grid-template-rows:auto auto;gap:24px;}
    .plan-large{grid-column:span 2;grid-row:span 2;}
  }
  .plan-card{
    position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:all .2s ease-out;
  }
  .plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
  .plan-large{
    background:linear-gradient(160deg,#fff 0%,#F4F8FF 100%);
    border-color:#D6E3FA;padding:30px;
  }
  .plan-icon{
    width:48px;height:48px;border-radius:14px;background:var(--brand-weak);color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:18px;
  }
  .plan-card h3{margin-bottom:10px;}
  .plan-card p{margin:0 0 16px;color:var(--ink-2);font-size:14.5px;}
  .plan-list{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:10px;}
  .plan-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-2);}
  .plan-list li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;background:var(--brand);
  }
  .plan-link{margin-top:auto;display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14.5px;}
  .plan-link:hover{gap:10px;}
  .ribbon{
    position:absolute;top:18px;right:18px;background:var(--accent);color:#fff;font-size:12.5px;font-weight:600;
    padding:4px 12px;border-radius:999px;
  }
  .plan-large .plan-list{grid-template-columns:1fr;}
  @media (min-width:640px){.plan-large .plan-list{grid-template-columns:repeat(2,1fr);}}

  /* 数据带 */
  .stats-band{
    background:linear-gradient(120deg,#134FBA 0%,#1A66E0 60%,#2E7BEA 100%);
    border-radius:var(--radius-lg);padding:36px 24px;color:#fff;
    box-shadow:0 16px 40px rgba(16,60,140,.24);
  }
  .stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
  .stat-item{position:relative;padding-right:8px;}
  .stat-num{font-size:clamp(26px,4vw,38px);font-weight:700;font-variant-numeric:tabular-nums;line-height:1.1;color:#fff;}
  .stat-num em{font-style:normal;color:#FFD9C4;}
  .stat-label{font-size:13px;color:rgba(255,255,255,.82);margin-top:8px;}
  @media (min-width:1024px){
    .stats-band{padding:44px 40px;}
    .stats-grid{grid-template-columns:repeat(4,1fr);}
    .stat-item:not(:last-child)::after{
      content:"";position:absolute;right:-12px;top:6px;bottom:6px;width:1px;background:rgba(255,255,255,.22);
    }
  }

  /* 分类卡 */
  .cat-grid{display:grid;gap:20px;grid-template-columns:1fr;}
  @media (min-width:640px){.cat-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.cat-grid{grid-template-columns:repeat(4,1fr);gap:24px;}}
  .cat-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
    display:flex;flex-direction:column;box-shadow:var(--shadow);transition:all .2s ease-out;
  }
  .cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
  .cat-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .cat-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
  .cat-card h3{font-size:17px;}
  .cat-card:hover h3{color:var(--brand);}
  .cat-body p{margin:0;font-size:13.8px;color:var(--ink-2);flex:1;}
  .cat-more{font-size:13.5px;color:var(--brand);font-weight:600;}

  /* 资讯列表 */
  .post-grid{display:grid;gap:20px;grid-template-columns:1fr;}
  @media (min-width:768px){.post-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
  .post-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
    display:flex;flex-direction:column;box-shadow:var(--shadow);transition:all .2s ease-out;
  }
  .post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
  .post-thumb{position:relative;}
  .post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .post-badge{
    position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--brand);
    font-size:12.5px;font-weight:600;padding:4px 10px;border-radius:999px;border:1px solid rgba(26,102,224,.18);
  }
  .post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .post-body h3{
    font-size:16.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
    overflow:hidden;transition:color .2s ease-out;
  }
  .post-card:hover h3{color:var(--brand);}
  .post-body p{
    margin:0;color:var(--ink-2);font-size:13.8px;line-height:1.7;flex:1;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-meta{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-2);
  }
  .post-meta .arrow{color:var(--brand);font-weight:600;}
  .empty-state{
    grid-column:1/-1;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);
    padding:48px 24px;text-align:center;
  }
  .empty-state .ico{
    width:56px;height:56px;border-radius:16px;background:var(--brand-weak);color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 16px;
  }
  .empty-state p{margin:0 0 18px;color:var(--ink-2);font-size:14.5px;}

  /* FAQ */
  .faq-wrap{max-width:900px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;text-align:left;font-size:16px;font-weight:600;background:none;transition:background .2s ease-out;
  }
  .faq-q:hover{background:#FAFBFE;}
  .faq-sign{
    flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--brand-weak);color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;transition:transform .25s ease-out;
  }
  .faq-item.open .faq-sign{transform:rotate(45deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
  .faq-a p{margin:0;padding:0 22px 22px;color:var(--ink-2);font-size:15px;line-height:1.8;}

  /* CTA 与隐私条 */
  .cta-band{
    background:var(--brand-weak);border:1px solid #D6E3FA;border-radius:var(--radius-lg);
    padding:36px 24px;display:flex;flex-direction:column;gap:22px;align-items:flex-start;
  }
  @media (min-width:1024px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px;}
    .cta-band .cta-text{max-width:640px;}
  }
  .cta-band h2{margin-bottom:10px;}
  .cta-band p{margin:0;color:var(--ink-2);font-size:15px;}
  .privacy-bar{
    display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;
    font-size:13px;color:var(--ink-2);text-align:center;padding:22px 16px 0;
  }
  .privacy-bar a{color:var(--brand);font-weight:600;}

  /* 表单弹层 */
  .modal{position:fixed;inset:0;z-index:120;display:none;}
  .modal.open{display:flex;align-items:flex-end;justify-content:center;}
  @media (min-width:640px){.modal.open{align-items:center;}}
  .modal-mask{position:absolute;inset:0;background:rgba(14,27,46,.5);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);}
  .modal-panel{
    position:relative;width:100%;max-width:520px;background:#fff;padding:28px 24px 26px;
    border-radius:24px 24px 0 0;box-shadow:0 -10px 40px rgba(16,40,80,.24);max-height:92vh;overflow-y:auto;
  }
  @media (min-width:640px){.modal-panel{border-radius:24px;padding:32px;}}
  .drag-bar{width:44px;height:5px;border-radius:999px;background:var(--line);margin:0 auto 18px;}
  @media (min-width:640px){.drag-bar{display:none;}}
  .modal-close{
    position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:50%;background:#F2F5FA;
    display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink-2);
  }
  .modal-close:hover{background:var(--brand-weak);color:var(--brand);}
  .field{margin-bottom:16px;}
  .field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;}
  .field input,.field select,.field textarea{
    width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:14.5px;
    background:#FBFCFE;transition:border-color .2s ease-out,background .2s ease-out;
  }
  .field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);background:#fff;outline:none;}
  .field textarea{min-height:96px;resize:vertical;}
  .check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-2);margin:4px 0 18px;}
  .check-row input{width:18px;height:18px;flex:0 0 auto;margin-top:2px;accent-color:var(--brand);}
  .form-tip{font-size:12.5px;color:var(--ink-2);margin-top:12px;text-align:center;}
  .submit-btn{width:100%;}

  /* 页脚 */
  .site-footer{background:#0E1B2E;color:#C3CEDF;margin-top:24px;padding:56px 0 24px;font-size:14px;}
  .footer-grid{display:grid;gap:32px;grid-template-columns:1fr;}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}}
  .site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
  .site-footer p{margin:0;line-height:1.8;color:#9EACC4;font-size:13.5px;}
  .footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:14px;}
  .footer-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
  .footer-list a{color:#C3CEDF;font-size:13.5px;transition:color .2s ease-out;}
  .footer-list a:hover{color:#fff;}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:#8595AE;
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;}
  .tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;background:rgba(255,255,255,.08);color:#C3CEDF;font-size:12.5px;}

  @media (max-width:1023px){
    .nav-menu,.nav-shell .nav-cta{display:none;}
    .nav-toggle{display:flex;}
    .brand-text{max-width:150px;font-size:15px;}
  }
  @media (max-width:519px){
    .hero-media img{aspect-ratio:16/12;}
    .trust-row{grid-template-columns:1fr;gap:12px;}
    .stat-num{font-size:26px;}
  }

/* roulang page: article */
:root{
    --brand:#1A66E0;
    --brand-weak:#E8F0FE;
    --accent:#FF7A3C;
    --teal:#12B3A6;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --ink:#0E1B2E;
    --ink-2:#5A6B85;
    --line:#E4E9F2;
    --radius-card:16px;
    --radius-panel:24px;
    --shadow-1:0 2px 8px rgba(16,40,80,.06);
    --shadow-2:0 12px 32px rgba(16,40,80,.12);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body.site-body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
  ul,ol{list-style:none;margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:640px){.container{padding:0 24px}}

  /* ============ 悬浮胶囊导航 ============ */
  .site-header{position:sticky;top:0;z-index:60;padding:12px 0}
  .nav-shell{
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:10px 12px 10px 16px;
    background:rgba(255,255,255,.82);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border:1px solid var(--line);
    border-radius:999px;
    box-shadow:var(--shadow-1);
  }
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--ink);white-space:nowrap}
  .brand-mark{
    width:34px;height:34px;flex:0 0 34px;
    border-radius:11px;
    background:linear-gradient(135deg,var(--brand),#4a8bfb);
    color:#fff;font-size:17px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(26,102,224,.28);
  }
  .nav-menu{display:flex;align-items:center;gap:2px}
  .nav-menu a{
    display:block;padding:9px 14px;border-radius:999px;
    font-size:14.5px;color:var(--ink-2);
    transition:background-color .2s ease-out,color .2s ease-out;
    white-space:nowrap;
  }
  .nav-menu a:hover{background:var(--brand-weak);color:var(--brand)}
  .nav-menu a.active{background:var(--brand);color:#fff;font-weight:600}
  .nav-cta{
    display:inline-flex;align-items:center;gap:8px;
    padding:10px 18px;border-radius:999px;
    background:var(--accent);color:#fff;
    font-size:14.5px;font-weight:600;
    box-shadow:0 8px 20px rgba(255,122,60,.28);
    transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
    white-space:nowrap;
  }
  .nav-cta:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,122,60,.34)}
  .nav-cta:active{transform:scale(.98)}
  .nav-toggle{
    display:none;width:40px;height:40px;flex:0 0 40px;
    border-radius:999px;background:var(--brand-weak);
    position:relative;
  }
  .nav-toggle span,
  .nav-toggle span::before,
  .nav-toggle span::after{
    position:absolute;left:50%;width:18px;height:2px;border-radius:2px;
    background:var(--brand);transform:translateX(-50%);
    transition:transform .2s ease-out,opacity .2s ease-out;
  }
  .nav-toggle span{top:19px}
  .nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
  .nav-toggle span::after{content:"";top:6px;left:0;transform:none}
  .nav-toggle.is-open span{background:transparent}
  .nav-toggle.is-open span::before{transform:rotate(45deg);top:0}
  .nav-toggle.is-open span::after{transform:rotate(-45deg);top:0}

  @media (max-width:1023px){
    .nav-menu{
      position:absolute;top:calc(100% + 10px);left:0;right:0;
      flex-direction:column;align-items:stretch;gap:2px;
      background:#fff;border:1px solid var(--line);border-radius:20px;
      padding:10px;box-shadow:var(--shadow-2);
      display:none;
    }
    .nav-menu.open{display:flex}
    .nav-menu a{padding:12px 16px;font-size:15px}
    .nav-toggle{display:block}
  }
  @media (max-width:640px){
    .nav-cta{display:none}
    .brand-text{font-size:15px;max-width:52vw;overflow:hidden;text-overflow:ellipsis}
  }

  /* ============ 通用组件 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 24px;border-radius:999px;
    font-size:15px;font-weight:600;
    transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out;
  }
  .btn:active{transform:scale(.98)}
  .btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(255,122,60,.26)}
  .btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.32)}
  .btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
  .btn-ghost:hover{background:var(--brand-weak);transform:translateY(-2px)}
  .btn-soft{background:var(--brand-weak);color:var(--brand)}
  .btn-soft:hover{filter:brightness(.97);transform:translateY(-2px)}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    background:var(--brand-weak);color:var(--brand);
    font-size:13px;font-weight:600;
  }
  .tag{
    display:inline-flex;align-items:center;
    padding:6px 12px;border-radius:999px;
    background:#fff;border:1px solid var(--line);
    font-size:13px;color:var(--ink-2);
    transition:border-color .2s ease-out,color .2s ease-out;
  }
  .tag:hover{border-color:var(--brand);color:var(--brand)}
  .tag-row{display:flex;flex-wrap:wrap;gap:8px}

  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--ink-2);margin-bottom:16px;
  }
  .crumb a{transition:color .2s ease-out}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{color:#c3cddd}
  .crumb .current{color:var(--ink-2);max-width:62vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  .sec-head{margin-bottom:24px}
  .sec-head h2{font-size:clamp(22px,3vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
  .sec-head p{margin-top:10px;color:var(--ink-2);font-size:15px}

  /* ============ 文章头部 ============ */
  .page-main{padding:26px 0 40px}
  .article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;align-items:start}
  @media (min-width:1024px){
    .article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:36px}
  }
  .article-col{min-width:0}

  .article-head{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-panel);
    padding:26px 22px;
    box-shadow:var(--shadow-1);
    margin-bottom:22px;
  }
  @media (min-width:768px){.article-head{padding:34px 36px}}
  .article-head h1{
    font-size:clamp(25px,4.2vw,38px);
    line-height:1.26;
    font-weight:700;
    letter-spacing:-.015em;
    margin:16px 0 16px;
  }
  .meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-2)}
  .meta-line .dot{width:4px;height:4px;border-radius:50%;background:#cbd6e6}

  /* ============ 正文排版 ============ */
  .article-body{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-panel);
    padding:26px 22px;
    box-shadow:var(--shadow-1);
    overflow-wrap:break-word;
  }
  @media (min-width:768px){.article-body{padding:42px 46px}}
  .article-body p{font-size:16.5px;line-height:1.9;color:#22314a;margin:0 0 1.15em}
  .article-body h2{
    font-size:clamp(20px,2.6vw,26px);
    font-weight:700;line-height:1.35;
    margin:1.9em 0 .8em;
    padding-left:14px;
    border-left:4px solid var(--brand);
    scroll-margin-top:120px;
  }
  .article-body h2:first-child{margin-top:0}
  .article-body h3{font-size:19px;font-weight:600;line-height:1.5;margin:1.6em 0 .6em}
  .article-body h4{font-size:16.5px;font-weight:600;margin:1.4em 0 .5em}
  .article-body ul{margin:0 0 1.2em}
  .article-body ul li{
    position:relative;padding-left:22px;margin-bottom:.6em;
    font-size:16px;line-height:1.85;color:#22314a;
  }
  .article-body ul li::before{
    content:"";position:absolute;left:3px;top:.7em;
    width:8px;height:8px;border-radius:3px;background:var(--brand);
  }
  .article-body ol{counter-reset:artli;margin:0 0 1.2em}
  .article-body ol li{
    position:relative;padding-left:34px;margin-bottom:.65em;
    font-size:16px;line-height:1.85;color:#22314a;
    counter-increment:artli;
  }
  .article-body ol li::before{
    content:counter(artli);
    position:absolute;left:0;top:.22em;
    width:22px;height:22px;border-radius:8px;
    background:var(--brand-weak);color:var(--brand);
    font-size:12.5px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
  }
  .article-body blockquote{
    margin:1.6em 0;padding:18px 22px;
    background:var(--brand-weak);
    border-left:3px solid var(--brand);
    border-radius:0 14px 14px 0;
    color:#2c3f5c;font-size:16px;line-height:1.85;
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:14px;margin:1.6em auto;max-width:100%}
  .article-body figure{margin:1.6em 0}
  .article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:10px}
  .article-body a{color:var(--brand);border-bottom:1px solid rgba(26,102,224,.35);transition:border-color .2s ease-out}
  .article-body a:hover{border-bottom-color:var(--brand)}
  .article-body strong{font-weight:600;color:var(--ink)}
  .article-body table{width:100%;border-collapse:collapse;font-size:14.5px;margin:1.6em 0}
  .article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
  .article-body th{background:var(--brand-weak);font-weight:600;color:var(--ink)}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
  @media (max-width:640px){
    .article-body table{display:block;overflow-x:auto;white-space:nowrap}
    .article-body th,.article-body td{padding:9px 11px}
  }
  .empty-state{
    text-align:center;padding:44px 20px;border:1px dashed var(--line);border-radius:18px;background:#fbfcfe;
  }
  .empty-state strong{display:block;font-size:19px;font-weight:700;margin-bottom:10px}
  .empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:20px}

  /* ============ 文末操作区 ============ */
  .post-foot{
    display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
    background:var(--surface);border:1px solid var(--line);border-radius:20px;
    padding:20px 22px;margin-top:22px;box-shadow:var(--shadow-1);
  }
  .post-foot .label{font-size:13px;color:var(--ink-2);margin-bottom:8px}
  .share-row{display:flex;gap:10px;flex-wrap:wrap}
  .share-btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:10px 18px;border-radius:999px;
    background:var(--brand-weak);color:var(--brand);
    font-size:14px;font-weight:600;
    transition:transform .2s ease-out,filter .2s ease-out;
  }
  .share-btn:hover{transform:translateY(-2px);filter:brightness(.97)}

  .pager{display:grid;grid-template-columns:1fr;gap:16px;margin-top:22px}
  @media (min-width:768px){.pager{grid-template-columns:1fr 1fr}}
  .pager-item{
    display:block;background:var(--surface);
    border:1px solid var(--line);border-radius:18px;
    padding:20px 22px;box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .pager-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#cfe0fb}
  .pager-item .kicker{font-size:12.5px;color:var(--ink-2);letter-spacing:.06em}
  .pager-item strong{display:block;font-size:16.5px;font-weight:600;line-height:1.5;margin:8px 0 6px}
  .pager-item:hover strong{color:var(--brand)}
  .pager-item span.desc{font-size:14px;color:var(--ink-2);line-height:1.7}

  /* ============ 相关推荐 ============ */
  .rec-section{margin-top:44px}
  .rec-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media (min-width:640px){.rec-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.rec-grid{grid-template-columns:repeat(3,1fr)}}
  .rec-card{
    display:block;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out;
  }
  .rec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
  .rec-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-weak)}
  .rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
  .rec-card:hover .rec-thumb img{transform:scale(1.05)}
  .rec-body{padding:18px 20px 22px}
  .rec-body h3{font-size:16.5px;font-weight:600;line-height:1.5;margin:10px 0 8px;transition:color .2s ease-out}
  .rec-card:hover .rec-body h3{color:var(--brand)}
  .rec-body p{font-size:14px;color:var(--ink-2);line-height:1.7}
  .rec-meta{margin-top:14px;font-size:12.5px;color:#8695ad;display:flex;justify-content:space-between;gap:10px}

  /* ============ 侧栏 ============ */
  .article-side{display:none}
  @media (min-width:1024px){
    .article-side{display:block}
    .side-sticky{position:sticky;top:96px}
  }
  .side-card{
    background:var(--surface);border:1px solid var(--line);
    border-radius:20px;padding:20px;box-shadow:var(--shadow-1);
    margin-bottom:20px;
  }
  .side-card h3{
    font-size:15.5px;font-weight:700;margin-bottom:14px;
    display:flex;align-items:center;gap:8px;
  }
  .side-card h3::before{
    content:"";width:6px;height:16px;border-radius:4px;background:var(--brand);display:inline-block;
  }
  .toc-list a{
    display:block;padding:8px 12px;border-radius:10px;
    font-size:14px;color:var(--ink-2);line-height:1.5;
    border-left:2px solid transparent;
    transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  }
  .toc-list a:hover{background:var(--brand-weak);color:var(--brand)}
  .toc-list a.active{background:var(--brand-weak);color:var(--brand);font-weight:600;border-left-color:var(--brand)}
  .side-links a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:11px 2px;font-size:14.5px;color:var(--ink-2);
    border-bottom:1px solid var(--line);
    transition:color .2s ease-out,padding-left .2s ease-out;
  }
  .side-links li:last-child a{border-bottom:0}
  .side-links a:hover{color:var(--brand);padding-left:6px}
  .side-links a::after{content:"→";font-size:14px;color:#b9c6da}
  .side-note{font-size:13.5px;color:var(--ink-2);line-height:1.7;margin-bottom:14px}

  /* ============ CTA 横条 ============ */
  .cta-band{
    margin-top:44px;
    background:var(--brand-weak);
    border:1px solid #d5e3fb;
    border-radius:var(--radius-panel);
    padding:30px 24px;
    display:flex;flex-wrap:wrap;gap:22px;
    align-items:center;justify-content:space-between;
  }
  @media (min-width:768px){.cta-band{padding:36px 40px}}
  .cta-band h2{font-size:clamp(20px,2.6vw,27px);font-weight:700;line-height:1.35}
  .cta-band p{margin-top:10px;color:#41567a;font-size:15px;max-width:520px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ============ 表单弹层 ============ */
  .modal-mask{
    position:fixed;inset:0;z-index:120;
    background:rgba(14,27,46,.5);
    -webkit-backdrop-filter:blur(4px);
    backdrop-filter:blur(4px);
    display:none;align-items:center;justify-content:center;
    padding:16px;
  }
  .modal-mask.open{display:flex}
  .modal-panel{
    position:relative;width:100%;max-width:520px;
    background:#fff;border-radius:24px;
    padding:30px 26px;max-height:90vh;overflow:auto;
    box-shadow:0 24px 60px rgba(9,20,40,.28);
    animation:popIn .22s ease-out;
  }
  @keyframes popIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
  .modal-close{
    position:absolute;top:14px;right:14px;
    width:36px;height:36px;border-radius:999px;
    background:#f1f4fa;color:var(--ink-2);font-size:18px;line-height:1;
    display:flex;align-items:center;justify-content:center;
    transition:background-color .2s ease-out,color .2s ease-out;
  }
  .modal-close:hover{background:var(--brand-weak);color:var(--brand)}
  .modal-panel h3{font-size:21px;font-weight:700;margin-bottom:8px}
  .modal-panel .sub{font-size:14px;color:var(--ink-2);margin-bottom:20px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:8px;color:#2b3c58}
  .field input,.field select,.field textarea{
    width:100%;padding:12px 14px;
    border:1px solid var(--line);border-radius:12px;
    font-size:15px;font-family:inherit;color:var(--ink);
    background:#fbfcfe;
    transition:border-color .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out;
  }
  .field textarea{min-height:96px;resize:vertical}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;background:#fff;border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(26,102,224,.14);
  }
  .check-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:18px}
  .check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand);flex:0 0 18px}
  .check-row span{font-size:13.5px;color:var(--ink-2);line-height:1.7}
  .form-tip{font-size:13.5px;color:var(--teal);margin-top:12px;display:none}
  .form-tip.show{display:block}
  @media (max-width:640px){
    .modal-mask{align-items:flex-end;padding:0}
    .modal-panel{border-radius:24px 24px 0 0;max-height:92vh;padding:26px 20px 30px}
    .modal-panel::before{
      content:"";display:block;width:44px;height:4px;border-radius:999px;
      background:#dbe3ef;margin:-8px auto 16px;
    }
  }

  /* ============ 页脚 ============ */
  .site-footer{background:#0E1B2E;color:#c7d2e4;margin-top:64px;padding:56px 0 24px}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:30px}
  @media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
  .footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:14px}
  .footer-brand .brand-mark{background:linear-gradient(135deg,var(--brand),#4a8bfb)}
  .site-footer p{font-size:14px;line-height:1.8;color:#a9b6cc}
  .site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
  .footer-list li{margin-bottom:10px}
  .footer-list a,.footer-list span{font-size:14.5px;color:#c7d2e4;transition:color .2s ease-out}
  .footer-list a:hover{color:#fff}
  .site-footer .tag{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:#dbe4f2}
  .site-footer .tag:hover{border-color:rgba(255,255,255,.4);color:#fff}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    border-top:1px solid rgba(255,255,255,.12);
    margin-top:36px;padding-top:20px;
    font-size:13px;color:#8f9db5;
  }

/* roulang page: category1 */
:root{
  --brand:#1A66E0;
  --brand-weak:#E8F0FE;
  --accent:#FF7A3C;
  --teal:#12B3A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --ink:#0E1B2E;
  --ink-2:#5A6B85;
  --line:#E4E9F2;
  --radius-card:16px;
  --radius-panel:24px;
  --shadow-1:0 2px 8px rgba(16,40,80,.06);
  --shadow-2:0 12px 32px rgba(16,40,80,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
html body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{line-height:1.28;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media (min-width:640px){.container{padding:0 24px;}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0;}
.nav-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:18px;
  min-height:64px;
  padding:10px 12px 10px 18px;
  border-radius:999px;
  background:rgba(255,255,255,.85);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  box-shadow:0 4px 18px rgba(16,40,80,.07);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,#1A66E0,#3F86EE);
  color:#fff;font-weight:700;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(26,102,224,.28);
}
.brand-text{font-weight:700;font-size:16px;letter-spacing:.2px;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-menu a{
  display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.nav-menu a:hover{background:var(--brand-weak);color:var(--brand);}
.nav-menu a.active{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(26,102,224,.25);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:999px;flex:0 0 auto;
  background:var(--accent);color:#fff;font-weight:600;font-size:14.5px;
  box-shadow:0 8px 20px rgba(255,122,60,.26);
  transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.nav-cta:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,60,.3);}
.nav-cta:active{transform:scale(.98);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:999px;
  border:1px solid var(--line);background:#fff;margin-left:auto;
  align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:background .2s ease-out;}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .25s ease-out,top .25s ease-out;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}

@media (max-width:1023px){
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-menu{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:12px;background:#fff;border:1px solid var(--line);
    border-radius:20px;box-shadow:0 18px 44px rgba(16,40,80,.16);
    display:none;margin-left:0;
  }
  .nav-menu.open{display:flex;}
  .nav-menu a{padding:13px 16px;font-size:15px;}
}
@media (max-width:520px){
  .brand-text{font-size:14px;}
  .brand-mark{width:30px;height:30px;font-size:15px;border-radius:10px;}
  .nav-shell{padding:8px 10px 8px 14px;min-height:58px;}
}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
@media (min-width:768px){.section{padding:80px 0;}}
@media (min-width:1024px){.section{padding:92px 0;}}
.section-head{max-width:760px;margin-bottom:36px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-weak);color:var(--brand);
  font-size:13px;font-weight:600;letter-spacing:.4px;
}
.section-title{font-size:clamp(22px,3vw,32px);font-weight:700;letter-spacing:-.3px;margin-top:16px;}
.section-desc{margin-top:14px;color:var(--ink-2);font-size:16px;line-height:1.8;}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#E9F1FE 0%,#F6F8FD 100%);
  border-bottom:1px solid var(--line);
  padding:38px 0 48px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(26,102,224,.12) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:18px;}
.breadcrumb a{transition:color .2s ease-out;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#B9C4D6;}
.breadcrumb .current{color:var(--ink-2);}
.hero-title{
  font-size:clamp(28px,5vw,44px);
  font-weight:700;line-height:1.2;letter-spacing:-.6px;
  max-width:860px;
}
.hero-sub{margin-top:16px;max-width:720px;font-size:17px;line-height:1.85;color:var(--ink-2);}
.hero-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;
  font-size:15px;font-weight:600;
  transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out,background-color .2s ease-out;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(255,122,60,.26);}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.3);}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-weak);}
.btn:active{transform:scale(.98);}
.btn-block{width:100%;}
.trust-row{
  display:flex;flex-wrap:wrap;gap:26px;
  margin-top:30px;padding-top:22px;
  border-top:1px solid rgba(26,102,224,.16);
}
.trust-item{display:flex;align-items:baseline;gap:10px;font-size:14px;color:var(--ink-2);}
.trust-num{font-size:19px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;}

/* ---------- 介绍区 ---------- */
.intro-grid{display:grid;gap:28px;}
@media (min-width:1024px){.intro-grid{grid-template-columns:1.35fr 1fr;align-items:start;}}
.prose p{font-size:16px;line-height:1.9;color:var(--ink-2);}
.prose p + p{margin-top:16px;}
.prose strong{color:var(--ink);font-weight:600;}
.check-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);
  padding:26px;box-shadow:var(--shadow-1);
}
.check-card h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.check-card .hint{font-size:13px;color:var(--ink-2);margin-bottom:12px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:var(--ink-2);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-dot{
  flex:0 0 auto;width:24px;height:24px;border-radius:8px;
  background:var(--brand-weak);color:var(--brand);
  font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.check-list strong{display:block;color:var(--ink);font-weight:600;font-size:15px;margin-bottom:2px;}

/* ---------- 条目卡片（左图右文） ---------- */
.entry-grid{display:grid;gap:24px;}
@media (min-width:768px){.entry-grid{grid-template-columns:repeat(2,1fr);}}
.entry-card{
  display:grid;grid-template-columns:210px 1fr;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CFE0FB;}
.entry-card img{width:100%;height:100%;min-height:180px;object-fit:cover;}
.entry-body{padding:22px;display:flex;flex-direction:column;}
.entry-body h3{font-size:18px;font-weight:600;}
.entry-body p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--ink-2);}
.entry-foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.entry-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.entry-card:hover .entry-link span{transform:translateX(3px);}
.entry-link span{transition:transform .2s ease-out;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  font-size:12.5px;font-weight:500;
  background:var(--brand-weak);color:var(--brand);
}
.tag-teal{background:rgba(18,179,166,.12);color:#0E9188;}
@media (max-width:639px){
  .entry-card{grid-template-columns:1fr;}
  .entry-card img{height:172px;min-height:0;}
}

/* ---------- 数据带 ---------- */
.stat-band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#124A96 0%,#1A66E0 100%);
  border-radius:var(--radius-panel);
  padding:38px 26px;color:#fff;
  display:grid;gap:26px;grid-template-columns:repeat(2,1fr);
}
.stat-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%);
}
@media (min-width:768px){
  .stat-band{grid-template-columns:repeat(4,1fr);padding:42px 34px;}
  .stat-item{border-left:1px solid rgba(255,255,255,.2);padding-left:22px;}
  .stat-item:first-child{border-left:0;padding-left:0;}
}
.stat-item{position:relative;z-index:1;}
.stat-num{font-size:clamp(26px,3.4vw,38px);font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums;}
.stat-label{margin-top:8px;font-size:13px;color:rgba(255,255,255,.82);line-height:1.6;}

/* ---------- FAQ ---------- */
.faq-list{
  background:var(--surface);border:1px solid var(--line);
  border-radius:20px;overflow:hidden;box-shadow:var(--shadow-1);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:background-color .2s ease-out;
}
.faq-q:hover{background:rgba(232,240,254,.6);}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:9px;
  background:var(--brand-weak);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;line-height:1;
  transition:transform .25s ease-out,background-color .25s ease-out,color .25s ease-out;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-a p{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#E9F1FE 0%,#F8FAFE 100%);
  border:1px solid #DCE7FB;border-radius:var(--radius-panel);
  padding:38px 28px;
  display:grid;gap:22px;
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:1fr auto;align-items:center;padding:44px 40px;}
}
.cta-band h2{font-size:clamp(21px,2.6vw,28px);font-weight:700;}
.cta-band p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.8;max-width:640px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0E1B2E;color:#C6D2E4;margin-top:72px;padding:56px 0 0;}
.footer-grid{display:grid;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:14px;}
.site-footer p{font-size:14px;line-height:1.85;color:#9FB0C8;}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px;}
.footer-list li{margin-bottom:10px;font-size:14px;color:#9FB0C8;}
.footer-list a{color:#9FB0C8;transition:color .2s ease-out;}
.footer-list a:hover{color:#fff;}
.site-footer .tag{background:rgba(255,255,255,.08);color:#C6D2E4;}
.footer-bottom{
  margin-top:40px;border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8296B2;
}

/* ---------- 表单弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:100;
  display:none;align-items:center;justify-content:center;padding:20px;
  background:rgba(14,27,46,.5);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}
.modal-mask.open{display:flex;}
.modal-panel{
  position:relative;width:100%;max-width:520px;
  background:#fff;border-radius:var(--radius-panel);
  padding:30px;box-shadow:0 30px 70px rgba(14,27,46,.32);
  max-height:90vh;overflow:auto;
}
.modal-close{
  position:absolute;top:16px;right:16px;
  width:34px;height:34px;border-radius:999px;
  background:var(--bg);color:var(--ink-2);
  display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.modal-close:hover{background:var(--brand-weak);color:var(--brand);}
.modal-panel h3{font-size:20px;font-weight:700;padding-right:40px;}
.modal-panel .modal-sub{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.75;}
.field{margin-top:14px;}
.field label{display:block;font-size:13.5px;color:var(--ink-2);font-weight:500;margin-bottom:6px;}
.field input,
.field select,
.field textarea{
  width:100%;padding:11px 14px;border-radius:12px;
  border:1px solid var(--line);background:#FBFCFE;
  font-size:15px;color:var(--ink);font-family:inherit;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{min-height:96px;resize:vertical;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(26,102,224,.14);
}
.check-row{display:flex;gap:10px;align-items:flex-start;margin-top:16px;font-size:13.5px;color:var(--ink-2);line-height:1.7;}
.check-row input[type="checkbox"]{width:18px;height:18px;margin-top:2px;accent-color:var(--brand);flex:0 0 auto;}
.form-tip{margin-top:12px;font-size:13px;color:var(--teal);display:none;}
.form-tip.show{display:block;}
@media (max-width:639px){
  .modal-panel{border-radius:24px 24px 20px 20px;padding:24px;}
}

/* roulang page: category2 */
:root{
  --brand:#1A66E0;
  --brand-weak:#E8F0FE;
  --brand-deep:#0F4BB0;
  --accent:#FF7A3C;
  --teal:#12B3A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --ink:#0E1B2E;
  --ink-2:#5A6B85;
  --line:#E4E9F2;
  --radius-s:10px;
  --radius-card:16px;
  --radius-panel:24px;
  --shadow-1:0 2px 8px rgba(16,40,80,.06);
  --shadow-2:0 12px 32px rgba(16,40,80,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  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;border:0;background:none;color:inherit;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:min(1200px,calc(100% - 32px));margin-inline:auto;}
.section{padding:56px 0;}
@media(min-width:768px){.section{padding:76px 0;}}
@media(min-width:1024px){.section{padding:92px 0;}}

/* ============ 导航 ============ */
.nav-shell{
  position:sticky;
  top:12px;
  z-index:60;
  width:min(1200px,calc(100% - 32px));
  margin:12px auto 0;
  display:flex;
  align-items:center;
  gap:14px;
  padding:10px 14px 10px 16px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 8px 26px rgba(16,40,80,.08);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;flex:0 0 auto;color:var(--ink);}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),#4A8BF0);
  color:#fff;font-size:17px;font-weight:700;letter-spacing:.5px;flex:0 0 auto;
}
.brand-text{white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-menu a{
  display:inline-block;padding:9px 14px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-2);
  transition:background .2s ease,color .2s ease;
}
.nav-menu a:hover{background:var(--brand-weak);color:var(--brand);}
.nav-menu a.active{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(26,102,224,.28);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;background:var(--accent);color:#fff;
  font-size:14.5px;font-weight:600;white-space:nowrap;
  box-shadow:0 8px 18px rgba(255,122,60,.28);
  transition:filter .2s ease,transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 12px 24px rgba(255,122,60,.34);}
.nav-cta:active{transform:scale(.98);}
.nav-toggle{display:none;width:42px;height:42px;border-radius:999px;border:1px solid var(--line);background:#fff;place-items:center;}
.nav-toggle span{display:block;position:relative;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background .2s ease;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s ease;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-shell.is-open .nav-toggle span{background:transparent;}
.nav-shell.is-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
.nav-shell.is-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}

@media(max-width:1023px){
  .nav-shell{flex-wrap:wrap;}
  .nav-toggle{display:grid;margin-left:auto;}
  .nav-cta{padding:9px 14px;font-size:13.5px;}
  .nav-menu{
    display:none;
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:12px;background:#fff;border:1px solid var(--line);
    border-radius:20px;box-shadow:var(--shadow-2);
  }
  .nav-shell.is-open .nav-menu{display:flex;}
  .nav-menu a{padding:12px 14px;font-size:15px;}
}
@media(max-width:560px){
  .brand-text{display:none;}
  .nav-cta span:last-child{display:none;}
  .nav-cta{padding:9px 14px;}
}

/* ============ 分类页 Hero ============ */
.page-hero{
  position:relative;
  padding:44px 0 46px;
  min-height:236px;
  background-image:linear-gradient(180deg,rgba(243,247,254,.95),rgba(232,240,254,.94)),url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(26,102,224,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(26,102,224,.07) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(circle at 78% 30%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 78% 30%,#000 0%,transparent 72%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb{font-size:13px;color:var(--ink-2);margin-bottom:16px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.breadcrumb a{color:var(--ink-2);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#B6C2D6;}
.breadcrumb .current{color:var(--ink);font-weight:600;}
.page-hero h1{
  font-size:clamp(26px,4.2vw,40px);line-height:1.25;font-weight:700;letter-spacing:.2px;
  max-width:820px;
}
.page-hero-lead{margin-top:14px;max-width:760px;font-size:16.5px;color:var(--ink-2);line-height:1.8;}
.hero-meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;}

/* ============ 通用小组件 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  background:var(--brand-weak);color:var(--brand);
  font-size:12.5px;font-weight:600;letter-spacing:.2px;
}
.tag.tag-teal{background:rgba(18,179,166,.12);color:#0C8C81;}
.tag.tag-accent{background:rgba(255,122,60,.13);color:#D65A1F;}
.badge-outline{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--ink-2);font-size:12.5px;
}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.6px;color:var(--brand);
  text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;display:inline-block;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  transition:filter .2s ease,transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 22px rgba(255,122,60,.28);}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.34);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-weak);transform:translateY(-2px);}
.btn-ghost:active{transform:scale(.98);}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}

/* ============ 介绍段落 ============ */
.intro-grid{display:grid;gap:24px;}
@media(min-width:960px){.intro-grid{grid-template-columns:1.45fr 1fr;gap:48px;align-items:start;}}
.intro-copy p{color:#33445E;font-size:16.5px;line-height:1.85;margin-bottom:18px;}
.intro-copy p:last-child{margin-bottom:0;}
.intro-copy strong{color:var(--ink);font-weight:700;}
.intro-side{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);
  padding:26px;box-shadow:var(--shadow-1);
}
.intro-side h3{font-size:18px;font-weight:700;margin-bottom:16px;}
.check-list li{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px;color:#33445E;}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list .dot{
  flex:0 0 auto;width:20px;height:20px;border-radius:50%;
  background:var(--brand-weak);color:var(--brand);
  display:grid;place-items:center;font-size:12px;font-weight:700;margin-top:3px;
}

/* ============ 交替图文列表 ============ */
.alt-list{display:flex;flex-direction:column;gap:44px;}
@media(min-width:768px){.alt-list{gap:64px;}}
.alt-row{display:grid;gap:22px;align-items:center;}
@media(min-width:900px){
  .alt-row{grid-template-columns:1.02fr 1fr;gap:56px;}
  .alt-row.is-reverse .alt-media{order:2;}
  .alt-row.is-reverse .alt-body{order:1;}
}
.alt-media{position:relative;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);}
.alt-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease;}
.alt-row:hover .alt-media img{transform:scale(1.04);}
.alt-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,27,46,0) 55%,rgba(14,27,46,.28));}
.alt-index{
  position:absolute;left:16px;top:16px;z-index:2;
  padding:5px 14px;border-radius:999px;background:rgba(255,255,255,.9);
  color:var(--brand);font-size:12.5px;font-weight:700;letter-spacing:.6px;
}
.alt-body h3{font-size:22px;font-weight:700;line-height:1.35;margin:14px 0 12px;}
.alt-body p{color:var(--ink-2);font-size:16px;line-height:1.85;}
.alt-points{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.alt-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#33445E;}
.alt-points li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:2px;
  background:var(--brand);margin-top:10px;
}
.alt-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:20px;
  color:var(--brand);font-size:15px;font-weight:600;transition:gap .2s ease,color .2s ease;
}
.alt-link:hover{gap:14px;color:var(--brand-deep);}

/* ============ 数据带 ============ */
.data-band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#1558C6 0%,#1A66E0 55%,#2E7BEF 100%);
  border-radius:var(--radius-panel);
  padding:38px 26px;
  box-shadow:0 18px 42px rgba(21,88,198,.24);
}
.data-band::after{
  content:"";position:absolute;right:-60px;top:-80px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.09);
}
.data-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,1fr);gap:26px 12px;}
@media(min-width:768px){.data-grid{grid-template-columns:repeat(4,1fr);}}
.data-item{text-align:center;padding:6px 8px;position:relative;}
@media(min-width:768px){
  .data-item:not(:last-child)::after{
    content:"";position:absolute;right:0;top:12%;height:76%;width:1px;background:rgba(255,255,255,.2);
  }
}
.data-num{font-size:clamp(26px,3.4vw,38px);font-weight:700;color:#fff;line-height:1.15;font-variant-numeric:tabular-nums;}
.data-num small{font-size:.5em;font-weight:600;margin-left:2px;}
.data-label{margin-top:8px;font-size:13px;color:rgba(255,255,255,.82);}

/* ============ 步骤条 ============ */
.steps{position:relative;display:flex;flex-direction:column;gap:28px;padding-left:6px;}
.steps::before{
  content:"";position:absolute;left:22px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(26,102,224,.12));
}
.step{position:relative;display:grid;grid-template-columns:44px 1fr;gap:18px;align-items:start;}
.step-num{
  position:relative;z-index:1;width:44px;height:44px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);color:var(--brand);
  display:grid;place-items:center;font-weight:700;font-size:14px;
  box-shadow:0 6px 16px rgba(26,102,224,.14);
}
.step-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:20px 22px;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease;}
.step-body:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.step-body h3{font-size:17.5px;font-weight:700;margin-bottom:8px;}
.step-body p{font-size:14.8px;color:var(--ink-2);line-height:1.8;}

/* ============ FAQ ============ */
.faq-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);box-shadow:var(--shadow-1);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:background .2s ease;
}
.faq-q:hover{background:rgba(232,240,254,.55);}
.faq-q .plus{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--brand-weak);color:var(--brand);
  display:grid;place-items:center;font-size:16px;line-height:1;
  transition:transform .25s ease,background .25s ease,color .25s ease;
}
.faq-item.is-open .plus{transform:rotate(45deg);background:var(--brand);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a p{padding:0 24px 22px;color:var(--ink-2);font-size:15px;line-height:1.85;}

/* ============ CTA 横条 ============ */
.cta-band{
  background:linear-gradient(135deg,#E8F0FE 0%,#F3F7FE 60%,#EAF6F5 100%);
  border:1px solid #D8E5FA;
  border-radius:var(--radius-panel);
  padding:34px 28px;
  display:grid;gap:22px;align-items:center;
}
@media(min-width:900px){.cta-band{grid-template-columns:1fr auto;padding:40px 44px;gap:32px;}}
.cta-band h2{font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.35;}
.cta-band p{margin-top:10px;color:var(--ink-2);font-size:15.5px;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 弹层表单 ============ */
.modal-mask{
  position:fixed;inset:0;z-index:100;display:none;
  align-items:center;justify-content:center;padding:20px;
  background:rgba(14,27,46,.5);
  -webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);
}
.modal-mask.is-open{display:flex;}
.modal-panel{
  width:100%;max-width:520px;max-height:90vh;overflow-y:auto;
  background:#fff;border-radius:var(--radius-panel);
  padding:30px;position:relative;box-shadow:0 28px 60px rgba(14,27,46,.3);
}
.modal-close{
  position:absolute;right:16px;top:16px;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;color:var(--ink-2);font-size:18px;
  transition:background .2s ease,color .2s ease;
}
.modal-close:hover{background:var(--brand-weak);color:var(--brand);}
.modal-panel h3{font-size:21px;font-weight:700;padding-right:34px;}
.modal-panel .modal-sub{margin-top:8px;font-size:14px;color:var(--ink-2);}
.form-grid{margin-top:22px;display:grid;gap:16px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:#33445E;margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;
  background:#FBFCFE;font-size:15px;color:var(--ink);font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:96px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(26,102,224,.14);
}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-2);line-height:1.7;}
.consent input{width:18px;height:18px;accent-color:var(--brand);margin-top:2px;flex:0 0 auto;}
.consent a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.form-submit{width:100%;}
.form-note{font-size:12.5px;color:var(--ink-2);text-align:center;}
@media(max-width:640px){
  .modal-mask{align-items:flex-end;padding:0;}
  .modal-panel{max-width:none;border-radius:24px 24px 0 0;padding:26px 20px 30px;}
}

/* ============ 页脚 ============ */
.site-footer{background:#0E1B2E;color:#C7D2E4;padding:60px 0 26px;margin-top:20px;}
.footer-grid{display:grid;gap:32px;}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:16px;}
.site-footer p{font-size:14px;line-height:1.8;color:#9DB0CB;}
.footer-grid h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-list li{margin-bottom:11px;font-size:14px;color:#9DB0CB;}
.footer-list a{color:#9DB0CB;transition:color .2s ease;}
.footer-list a:hover{color:#fff;}
.site-footer .tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.site-footer .tag{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:#C7D2E4;font-weight:500;}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7C8DA9;
}

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

/* roulang page: category3 */
:root{
    --brand:#1A66E0;
    --brand-weak:#E8F0FE;
    --accent:#FF7A3C;
    --teal:#12B3A6;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --ink:#0E1B2E;
    --ink-2:#5A6B85;
    --line:#E4E9F2;
    --radius-card:16px;
    --radius-panel:24px;
    --shadow-1:0 2px 8px rgba(16,40,80,.06);
    --shadow-2:0 12px 32px rgba(16,40,80,.12);
  }

  *,*::before,*::after{box-sizing:border-box}

  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
  }

  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  ul,ol{margin:0;padding:0;list-style:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input,select,textarea{font:inherit;color:inherit}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px}

  body .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 16px;
  }
  @media (min-width:640px){
    body .container{padding:0 24px}
  }

  /* ---------- 悬浮胶囊导航 ---------- */
  .site-header{
    position:sticky;
    top:12px;
    z-index:60;
    padding:12px 0 4px;
  }
  .nav-shell{
    position:relative;
    display:flex;
    align-items:center;
    gap:14px;
    padding:8px 10px 8px 16px;
    background:rgba(255,255,255,.86);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border:1px solid var(--line);
    border-radius:999px;
    box-shadow:0 6px 24px rgba(16,40,80,.08);
  }
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    display:grid;
    place-items:center;
    width:34px;height:34px;
    border-radius:11px;
    background:linear-gradient(135deg,#1A66E0,#3D86F0);
    color:#fff;
    font-size:17px;
    font-weight:700;
    box-shadow:0 4px 12px rgba(26,102,224,.32);
  }
  .brand-text{font-size:16px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
  .nav-menu{
    display:flex;
    align-items:center;
    gap:2px;
    margin:0 0 0 auto;
  }
  .nav-menu a{
    display:inline-block;
    padding:8px 14px;
    border-radius:999px;
    font-size:14.5px;
    color:var(--ink-2);
    transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-menu a:hover{background:var(--brand-weak);color:var(--brand)}
  .nav-menu a.active{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(26,102,224,.28)}
  .nav-cta{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:9px 18px;
    border-radius:999px;
    background:var(--accent);
    color:#fff;
    font-size:14.5px;
    font-weight:600;
    box-shadow:0 6px 18px rgba(255,122,60,.3);
    transition:transform .2s ease-out,filter .2s ease-out,box-shadow .2s ease-out;
  }
  .nav-cta:hover{filter:brightness(.94);transform:translateY(-1px)}
  .nav-cta:active{transform:scale(.98)}
  .nav-toggle{
    display:none;
    width:42px;height:42px;
    border-radius:999px;
    background:var(--brand-weak);
    align-items:center;
    justify-content:center;
    flex-shrink:0;
  }
  .nav-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--brand)}
  .nav-toggle span::before,
  .nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--brand);
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}

  @media (max-width:1023px){
    .nav-shell{padding:8px 10px}
    .nav-toggle{display:inline-flex;margin-left:auto}
    .nav-cta{display:none}
    .nav-menu{
      position:absolute;
      left:0;right:0;
      top:calc(100% + 8px);
      display:none;
      flex-direction:column;
      align-items:stretch;
      gap:4px;
      padding:10px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--shadow-2);
    }
    .nav-menu a{padding:12px 14px;border-radius:14px;font-size:15px}
    .nav-shell.nav-open .nav-menu{display:flex}
  }
  @media (max-width:520px){
    .brand-text{font-size:14px}
    .brand-mark{width:30px;height:30px;font-size:15px;border-radius:10px}
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:13px 26px;
    border-radius:999px;
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out,filter .2s ease-out;
  }
  .btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 24px rgba(255,122,60,.3)}
  .btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.34)}
  .btn-ghost{background:#fff;color:var(--brand);border-color:rgba(26,102,224,.4)}
  .btn-ghost:hover{background:var(--brand-weak);transform:translateY(-2px)}
  .btn:active{transform:scale(.98)}
  .btn[disabled]{opacity:.4;cursor:not-allowed}

  /* ---------- 窄幅页头 ---------- */
  .page-hero{
    position:relative;
    overflow:hidden;
    padding:20px 0 52px;
    background:
      radial-gradient(760px 260px at 88% -20%,rgba(26,102,224,.14),transparent 70%),
      linear-gradient(180deg,#EEF4FF 0%,#F7F9FE 100%);
    border-bottom:1px solid var(--line);
  }
  .page-hero::before{
    content:"";
    position:absolute;inset:0;
    background-image:
      linear-gradient(var(--line) 1px,transparent 1px),
      linear-gradient(90deg,var(--line) 1px,transparent 1px);
    background-size:46px 46px;
    opacity:.35;
    -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
    mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
    pointer-events:none;
  }
  .page-hero .container{position:relative;z-index:1}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:18px}
  .breadcrumb a{color:var(--ink-2)}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:#B6C2D6}
  .breadcrumb .current{color:var(--ink-2)}
  .hero-title{
    margin:0 0 14px;
    max-width:840px;
    font-size:clamp(26px,4.6vw,42px);
    line-height:1.22;
    font-weight:700;
    letter-spacing:-.3px;
  }
  .hero-title em{font-style:normal;color:var(--brand);box-shadow:inset 0 -.28em 0 rgba(26,102,224,.16)}
  .hero-lead{margin:0 0 24px;max-width:720px;font-size:16.5px;color:var(--ink-2)}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
  .hero-facts{display:flex;flex-wrap:wrap;gap:10px}
  .hero-facts li{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 14px;
    border-radius:999px;
    background:rgba(255,255,255,.9);
    border:1px solid var(--line);
    font-size:13.5px;
    color:var(--ink-2);
  }
  .hero-facts b{color:var(--brand);font-weight:700}

  /* ---------- 板块 ---------- */
  .section{padding:56px 0}
  @media (min-width:768px){.section{padding:76px 0}}
  @media (min-width:1024px){.section{padding:92px 0}}
  .section-head{max-width:780px;margin-bottom:32px}
  .section-title{margin:0 0 12px;font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700}
  .section-sub{margin:0;font-size:16px;color:var(--ink-2)}
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    margin-bottom:16px;
    padding:6px 14px;
    border-radius:999px;
    background:var(--brand-weak);
    color:var(--brand);
    font-size:13px;
    font-weight:600;
    letter-spacing:.06em;
  }

  /* ---------- 介绍区 ---------- */
  .intro-grid{display:grid;gap:32px;align-items:center}
  @media (min-width:1024px){.intro-grid{grid-template-columns:1.05fr .95fr;gap:52px}}
  .intro-text p{margin:0 0 16px;font-size:16px;color:#38485F}
  .intro-text p:last-of-type{margin-bottom:0}
  .intro-points{display:grid;gap:12px;margin-top:24px}
  .intro-points li{display:flex;gap:10px;font-size:15px;color:var(--ink)}
  .intro-points li::before{content:"";flex:0 0 auto;width:8px;height:8px;margin-top:8px;border-radius:3px;background:var(--brand)}
  .intro-media img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
    border-radius:14px;
    box-shadow:var(--shadow-1);
  }

  /* ---------- 数据带 ---------- */
  .stat-band{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:22px 8px;
    padding:28px 20px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-panel);
    box-shadow:var(--shadow-1);
  }
  @media (min-width:768px){
    .stat-band{grid-template-columns:repeat(4,1fr);padding:34px 24px}
  }
  .stat-cell{position:relative;text-align:center}
  @media (min-width:768px){
    .stat-cell + .stat-cell::before{
      content:"";
      position:absolute;left:0;top:14%;height:72%;width:1px;background:var(--line);
    }
  }
  .stat-num{
    font-size:clamp(28px,4vw,38px);
    font-weight:700;
    line-height:1.1;
    color:var(--brand);
    font-variant-numeric:tabular-nums;
  }
  .stat-num em{font-style:normal;margin-left:2px;font-size:.6em;color:var(--accent)}
  .stat-label{margin-top:8px;font-size:13px;color:var(--ink-2)}

  /* ---------- 内容网格 + 侧栏 ---------- */
  .content-grid{display:grid;gap:28px}
  @media (min-width:1024px){
    .content-grid{grid-template-columns:minmax(0,1fr) 316px;gap:36px;align-items:start}
  }
  .card-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1280px){.card-grid{grid-template-columns:repeat(3,1fr)}}

  .mini-card{
    display:flex;
    flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(26,102,224,.35)}
  .mini-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-weak)}
  .mini-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
  .mini-card:hover .mini-thumb img{transform:scale(1.04)}
  .mini-body{display:flex;flex-direction:column;gap:8px;flex:1;padding:16px 16px 18px}
  .mini-badge{
    align-self:flex-start;
    padding:3px 10px;
    border-radius:999px;
    background:var(--brand-weak);
    border:1px solid rgba(26,102,224,.16);
    color:var(--brand);
    font-size:12px;
    font-weight:600;
  }
  .mini-card h3{margin:0;font-size:16.5px;line-height:1.45;font-weight:600}
  .mini-body p{margin:0;font-size:14px;line-height:1.7;color:var(--ink-2)}
  .mini-points{display:grid;gap:6px;margin-top:4px}
  .mini-points li{display:flex;gap:8px;font-size:13px;color:var(--ink-2)}
  .mini-points li::before{content:"✓";color:var(--teal);font-weight:700}

  .side-col{display:grid;gap:20px}
  @media (min-width:1024px){.side-col{position:sticky;top:96px}}
  .side-card{
    padding:22px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:var(--shadow-1);
  }
  .side-card h3{margin:0 0 14px;font-size:16px;font-weight:700}
  .check-list{display:grid;gap:10px}
  .check-list li{display:flex;gap:10px;font-size:14px;line-height:1.6;color:var(--ink-2)}
  .check-list .dot{
    position:relative;
    flex:0 0 auto;
    width:18px;height:18px;
    margin-top:3px;
    border-radius:6px;
    background:var(--brand-weak);
    border:1px solid rgba(26,102,224,.2);
  }
  .check-list .dot::after{
    content:"";
    position:absolute;left:5px;top:5px;
    width:6px;height:6px;
    border-radius:2px;
    background:var(--brand);
  }
  .side-links{display:grid;gap:2px}
  .side-links a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    padding:11px 12px;
    border-radius:12px;
    font-size:14.5px;
    color:var(--ink);
    transition:background .2s ease-out,color .2s ease-out;
  }
  .side-links a:hover{background:rgba(232,240,254,.75);color:var(--brand)}
  .side-note{
    padding:20px;
    background:linear-gradient(180deg,#F1F6FF,#FFFFFF);
    border:1px dashed rgba(26,102,224,.35);
    border-radius:20px;
  }
  .side-note p{margin:0 0 14px;font-size:14px;line-height:1.7;color:var(--ink-2)}
  .side-note p:last-of-type{margin-bottom:0}

  /* ---------- FAQ ---------- */
  .faq-list{
    max-width:900px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-panel);
    overflow:hidden;
    box-shadow:var(--shadow-1);
  }
  .faq-item + .faq-item{border-top:1px solid var(--line)}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:20px 22px;
    text-align:left;
    font-size:16px;
    font-weight:600;
    transition:background .2s ease-out;
  }
  .faq-q:hover{background:rgba(232,240,254,.6)}
  .faq-icon{
    flex:0 0 auto;
    display:grid;
    place-items:center;
    width:26px;height:26px;
    border-radius:999px;
    background:var(--brand-weak);
    color:var(--brand);
    font-size:17px;
    line-height:1;
    transition:transform .25s ease-out,background .2s ease-out,color .2s ease-out;
  }
  .faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
  .faq-a p{
    max-width:760px;
    margin:0;
    padding:0 22px 22px;
    font-size:15px;
    line-height:1.85;
    color:var(--ink-2);
  }
  .faq-item.open .faq-a{max-height:560px}

  /* ---------- CTA ---------- */
  .cta-band{
    display:grid;
    gap:22px;
    align-items:center;
    padding:34px 24px;
    background:linear-gradient(120deg,#E9F1FF 0%,#F3F7FF 58%,#FFF2E9 100%);
    border:1px solid rgba(26,102,224,.16);
    border-radius:var(--radius-panel);
  }
  @media (min-width:900px){
    .cta-band{grid-template-columns:1fr auto;padding:44px 42px;gap:32px}
  }
  .cta-band h2{margin:0 0 10px;font-size:clamp(20px,2.6vw,28px);font-weight:700;line-height:1.32}
  .cta-band p{margin:0;max-width:660px;font-size:15.5px;color:var(--ink-2)}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:8px;
    padding:56px 0 24px;
    background:#0E1B2E;
    color:#C9D4E6;
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:40px}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:17px;font-weight:700;color:#fff}
  .site-footer h4{margin:0 0 14px;font-size:15px;font-weight:600;color:#fff}
  .site-footer p{margin:0 0 10px;font-size:14px;line-height:1.8;color:#93A4C0}
  .footer-list{display:grid;gap:10px}
  .footer-list a,.footer-list span{font-size:14px;color:#A9B8D2}
  .footer-list a{transition:color .2s ease-out}
  .footer-list a:hover{color:#fff}
  .tag-row{display:flex;flex-wrap:wrap;gap:8px}
  .tag{
    padding:4px 10px;
    border-radius:999px;
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.12);
    font-size:12px;
    color:#C9D4E6;
  }
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:10px;
    margin-top:36px;
    padding-top:20px;
    border-top:1px solid rgba(255,255,255,.1);
    font-size:13px;
    color:#8798B6;
  }

  /* ---------- 弹层 ---------- */
  .modal-mask{
    position:fixed;
    inset:0;
    z-index:200;
    display:none;
    align-items:center;
    justify-content:center;
    padding:20px;
    background:rgba(14,27,46,.5);
    -webkit-backdrop-filter:blur(4px);
    backdrop-filter:blur(4px);
  }
  .modal-mask.open{display:flex}
  .modal-panel{
    position:relative;
    width:100%;
    max-width:520px;
    max-height:90vh;
    overflow:auto;
    padding:30px;
    background:#fff;
    border-radius:var(--radius-panel);
    box-shadow:0 24px 60px rgba(14,27,46,.3);
  }
  .modal-close{
    position:absolute;
    right:16px;top:16px;
    display:grid;
    place-items:center;
    width:34px;height:34px;
    border-radius:999px;
    background:var(--bg);
    color:var(--ink-2);
    font-size:18px;
    transition:background .2s ease-out,color .2s ease-out;
  }
  .modal-close:hover{background:var(--brand-weak);color:var(--brand)}
  .modal-panel h3{margin:0 0 8px;font-size:20px;font-weight:700}
  .modal-sub{margin:0 0 20px;font-size:14px;color:var(--ink-2)}
  .form-field{margin-bottom:16px}
  .form-field label{display:block;margin-bottom:6px;font-size:13.5px;font-weight:600}
  .form-field input,
  .form-field select,
  .form-field textarea{
    width:100%;
    padding:11px 14px;
    background:#FBFCFE;
    border:1px solid var(--line);
    border-radius:12px;
    font-size:14.5px;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .form-field textarea{min-height:96px;resize:vertical}
  .form-field input:focus,
  .form-field select:focus,
  .form-field textarea:focus{
    outline:none;
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(26,102,224,.15);
  }
  .form-check{display:flex;align-items:flex-start;gap:10px;margin-bottom:18px;font-size:13px;color:var(--ink-2)}
  .form-check input{flex:0 0 auto;width:18px;height:18px;margin-top:2px;accent-color:var(--brand)}
  .form-check a{color:var(--brand)}
  .form-submit{width:100%;justify-content:center}
  .form-tip{margin:12px 0 0;font-size:13px;color:var(--teal);min-height:18px}
  .drawer-bar{display:none}
  body.modal-open{overflow:hidden}
  @media (max-width:640px){
    .modal-mask{align-items:flex-end;padding:0}
    .modal-panel{max-width:none;max-height:88vh;padding:26px 20px 30px;border-radius:24px 24px 0 0}
    .drawer-bar{display:block;width:44px;height:4px;margin:0 auto 16px;border-radius:999px;background:var(--line)}
  }

/* roulang page: category4 */
:root{
    --brand:#1A66E0;
    --brand-weak:#E8F0FE;
    --accent:#FF7A3C;
    --teal:#12B3A6;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --ink:#0E1B2E;
    --ink-2:#5A6B85;
    --line:#E4E9F2;
    --radius-sm:10px;
    --radius:16px;
    --radius-lg:24px;
    --pill:999px;
    --shadow-1:0 2px 8px rgba(16,40,80,.06);
    --shadow-2:0 12px 32px rgba(16,40,80,.12);
    --maxw:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  .site-body{
    margin:0;
    padding:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  .site-body img{display:block;max-width:100%;height:auto;}
  .site-body a{text-decoration:none;color:inherit;}
  .site-body button{font-family:inherit;border:none;background:none;cursor:pointer;}
  .site-body ul,.site-body ol{margin:0;padding:0;list-style:none;}
  .site-body h1,.site-body h2,.site-body h3,.site-body h4,.site-body p{margin:0;}
  .site-body :focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

  .container{
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding-left:16px;
    padding-right:16px;
  }
  @media (min-width:640px){
    .container{padding-left:24px;padding-right:24px;}
  }

  /* ---------- 悬浮胶囊导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    padding:12px 0 6px;
    background:linear-gradient(180deg,rgba(245,247,251,.96) 60%,rgba(245,247,251,0));
    backdrop-filter:blur(6px);
  }
  .nav-shell{
    position:relative;
    display:flex;
    align-items:center;
    gap:16px;
    min-height:64px;
    padding:8px 10px 8px 14px;
    background:rgba(255,255,255,.86);
    backdrop-filter:blur(14px);
    border:1px solid var(--line);
    border-radius:var(--pill);
    box-shadow:0 6px 24px rgba(16,40,80,.08);
  }
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex-shrink:0;
  }
  .brand-mark{
    display:grid;
    place-items:center;
    width:38px;
    height:38px;
    border-radius:12px;
    background:linear-gradient(140deg,var(--brand),#4c8bf0);
    color:#fff;
    font-size:17px;
    font-weight:700;
    letter-spacing:-.5px;
  }
  .brand-text{
    font-size:16px;
    font-weight:700;
    color:var(--ink);
    white-space:nowrap;
  }
  .nav-menu{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
  }
  .nav-menu li{display:block;}
  .nav-menu a{
    display:block;
    padding:9px 14px;
    font-size:14.5px;
    color:var(--ink-2);
    border-radius:var(--pill);
    white-space:nowrap;
    transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-menu a:hover{background:var(--brand-weak);color:var(--brand);}
  .nav-menu a.active{
    background:var(--brand);
    color:#fff;
    font-weight:600;
    box-shadow:0 6px 16px rgba(26,102,224,.28);
  }
  .nav-cta{
    display:inline-flex;
    align-items:center;
    gap:6px;
    flex-shrink:0;
    padding:11px 20px;
    background:var(--accent);
    color:#fff;
    font-size:14.5px;
    font-weight:600;
    border-radius:var(--pill);
    box-shadow:0 8px 20px rgba(255,122,60,.28);
    transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  }
  .nav-cta:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,60,.34);}
  .nav-cta:active{transform:scale(.98);}
  .nav-toggle{
    display:none;
    width:44px;
    height:44px;
    border-radius:50%;
    border:1px solid var(--line);
    background:#fff;
    place-items:center;
    flex-shrink:0;
  }
  .nav-toggle span,
  .nav-toggle span::before,
  .nav-toggle span::after{
    content:"";
    display:block;
    width:18px;
    height:2px;
    border-radius:2px;
    background:var(--ink);
    transition:transform .2s ease-out,opacity .2s ease-out;
  }
  .nav-toggle span::before{transform:translateY(-6px);}
  .nav-toggle span::after{transform:translateY(4px);}
  .nav-shell.open .nav-toggle span{background:transparent;}
  .nav-shell.open .nav-toggle span::before{transform:translateY(0) rotate(45deg);}
  .nav-shell.open .nav-toggle span::after{transform:translateY(-2px) rotate(-45deg);}

  @media (max-width:1023px){
    .nav-shell{flex-wrap:wrap;justify-content:space-between;border-radius:28px;}
    .brand-text{font-size:15px;}
    .nav-toggle{display:grid;}
    .nav-cta{padding:10px 16px;font-size:13.5px;}
    .nav-menu{
      order:5;
      display:none;
      flex-direction:column;
      align-items:stretch;
      gap:2px;
      width:100%;
      margin-left:0;
      padding:10px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--shadow-2);
    }
    .nav-shell.open .nav-menu{display:flex;}
    .nav-menu a{padding:12px 14px;font-size:15px;border-radius:14px;}
  }
  @media (max-width:520px){
    .brand-text{max-width:120px;white-space:normal;line-height:1.2;font-size:14px;}
    .nav-cta span:first-child{display:none;}
    .nav-cta{padding:11px 14px;}
  }

  /* ---------- 通用组件 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 26px;
    font-size:15px;
    font-weight:600;
    border-radius:var(--pill);
    transition:filter .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out;
  }
  .btn-primary{
    background:var(--accent);
    color:#fff;
    box-shadow:0 10px 24px rgba(255,122,60,.28);
  }
  .btn-primary:hover{filter:brightness(.94);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,60,.34);}
  .btn-primary:active{transform:scale(.98);}
  .btn-ghost{
    background:#fff;
    color:var(--brand);
    border:1.5px solid var(--brand);
  }
  .btn-ghost:hover{background:var(--brand-weak);transform:translateY(-2px);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-brand{
    background:var(--brand);
    color:#fff;
    box-shadow:0 10px 24px rgba(26,102,224,.24);
  }
  .btn-brand:hover{filter:brightness(.93);transform:translateY(-2px);}

  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:6px 14px;
    font-size:13px;
    font-weight:600;
    color:var(--brand);
    background:var(--brand-weak);
    border-radius:var(--pill);
  }
  .badge-teal{color:#0a7f76;background:#e2f6f4;}
  .tag{
    display:inline-block;
    padding:5px 12px;
    font-size:12.5px;
    color:var(--ink-2);
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--pill);
    margin:0 6px 8px 0;
  }
  .tag-row{display:flex;flex-wrap:wrap;}

  .section{padding:56px 0;}
  @media (min-width:768px){.section{padding:72px 0;}}
  @media (min-width:1024px){.section{padding:88px 0;}}

  .sec-head{max-width:760px;margin-bottom:32px;}
  .sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .h2{
    font-size:clamp(22px,3vw,32px);
    line-height:1.3;
    font-weight:700;
    letter-spacing:-.3px;
    color:var(--ink);
  }
  .sec-sub{
    margin-top:12px;
    font-size:16px;
    color:var(--ink-2);
    line-height:1.8;
  }
  .eyebrow{
    display:inline-block;
    margin-bottom:12px;
    font-size:13px;
    font-weight:700;
    letter-spacing:.16em;
    color:var(--brand);
    text-transform:uppercase;
  }

  /* ---------- 内页窄幅 Hero ---------- */
  .hero-narrow{
    position:relative;
    overflow:hidden;
    padding:48px 0 44px;
    background:
      radial-gradient(680px 280px at 88% -10%,rgba(26,102,224,.14),transparent 70%),
      linear-gradient(180deg,#EDF3FE 0%,#F5F7FB 100%);
    border-bottom:1px solid var(--line);
  }
  .hero-narrow::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:linear-gradient(rgba(26,102,224,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(26,102,224,.05) 1px,transparent 1px);
    background-size:44px 44px;
    opacity:.6;
    pointer-events:none;
  }
  .hero-narrow .container{position:relative;z-index:2;}
  .hero-narrow-inner{max-width:840px;}
  .hero-title{
    margin-top:16px;
    font-size:clamp(28px,5vw,44px);
    line-height:1.2;
    font-weight:700;
    letter-spacing:-.6px;
    color:var(--ink);
  }
  .hero-title em{
    font-style:normal;
    color:var(--brand);
    background:linear-gradient(180deg,transparent 62%,rgba(255,122,60,.28) 62%);
  }
  .hero-lead{
    margin-top:16px;
    font-size:clamp(15px,1.6vw,17px);
    line-height:1.85;
    color:var(--ink-2);
    max-width:720px;
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:26px;
  }
  .hero-meta{
    display:flex;
    flex-wrap:wrap;
    gap:10px 26px;
    margin-top:28px;
    padding-top:20px;
    border-top:1px dashed rgba(26,102,224,.22);
  }
  .hero-meta-item{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13.5px;
    color:var(--ink-2);
  }
  .dot{
    width:8px;height:8px;border-radius:50%;
    background:var(--teal);
    flex-shrink:0;
  }

  /* ---------- 面包屑 ---------- */
  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    padding:16px 0 0;
    font-size:13px;
    color:var(--ink-2);
  }
  .breadcrumb a{color:var(--brand);}
  .breadcrumb a:hover{text-decoration:underline;}
  .breadcrumb .sep{color:#c3cddd;}
  .breadcrumb .current{color:var(--ink-2);}

  /* ---------- 介绍段落 ---------- */
  .intro-grid{
    display:grid;
    gap:28px;
    grid-template-columns:1fr;
  }
  @media (min-width:1024px){
    .intro-grid{grid-template-columns:1.35fr 1fr;gap:48px;align-items:start;}
  }
  .intro-text p{
    font-size:16px;
    line-height:1.95;
    color:#26364f;
    margin-bottom:18px;
  }
  .intro-text p:last-child{margin-bottom:0;}
  .intro-text strong{color:var(--ink);}
  .intro-aside{
    padding:26px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-1);
  }
  .intro-aside h3{
    font-size:18px;
    font-weight:600;
    margin-bottom:14px;
  }
  .check-list li{
    position:relative;
    padding-left:26px;
    margin-bottom:12px;
    font-size:15px;
    line-height:1.75;
    color:var(--ink-2);
  }
  .check-list li::before{
    content:"";
    position:absolute;
    left:0;
    top:8px;
    width:10px;
    height:10px;
    border-radius:3px;
    background:var(--brand-weak);
    border:2px solid var(--brand);
  }
  .intro-aside .btn{margin-top:18px;width:100%;}

  /* ---------- 时间轴排查步骤 ---------- */
  .timeline{
    position:relative;
    padding-top:8px;
  }
  .timeline::before{
    content:"";
    position:absolute;
    left:23px;
    top:20px;
    bottom:26px;
    width:2px;
    background:linear-gradient(180deg,var(--brand) 0%,rgba(26,102,224,.18) 100%);
  }
  .tl-item{
    position:relative;
    padding:0 0 26px 74px;
  }
  .tl-item:last-child{padding-bottom:0;}
  .tl-dot{
    position:absolute;
    left:0;
    top:0;
    width:48px;
    height:48px;
    display:grid;
    place-items:center;
    background:#fff;
    border:1px solid var(--line);
    border-radius:14px;
    box-shadow:var(--shadow-1);
    font-size:15px;
    font-weight:700;
    color:var(--brand);
    font-variant-numeric:tabular-nums;
  }
  .tl-item:hover .tl-dot{border-color:var(--brand);box-shadow:0 8px 20px rgba(26,102,224,.16);}
  .tl-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:22px 24px;
    box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .tl-item:hover .tl-card{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#d7e3fb;}
  .tl-card h3{
    font-size:18px;
    font-weight:600;
    margin-bottom:8px;
  }
  .tl-card p{
    font-size:15px;
    line-height:1.85;
    color:var(--ink-2);
  }
  .tl-note{
    display:inline-flex;
    align-items:center;
    gap:6px;
    margin-top:12px;
    padding:5px 12px;
    font-size:12.5px;
    color:#0a7f76;
    background:#e2f6f4;
    border-radius:var(--pill);
  }
  @media (max-width:520px){
    .timeline::before{left:19px;}
    .tl-item{padding-left:58px;}
    .tl-dot{width:40px;height:40px;border-radius:12px;font-size:13.5px;}
    .tl-card{padding:18px;}
  }

  /* ---------- 卡片网格 ---------- */
  .card-grid{
    display:grid;
    gap:20px;
    grid-template-columns:1fr;
  }
  @media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
  .card{
    display:flex;
    flex-direction:column;
    gap:12px;
    padding:24px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d7e3fb;}
  .card-icon{
    display:grid;
    place-items:center;
    width:46px;
    height:46px;
    border-radius:13px;
    background:var(--brand-weak);
    color:var(--brand);
    font-size:19px;
    font-weight:700;
  }
  .card h3{font-size:18px;font-weight:600;line-height:1.45;}
  .card p{font-size:15px;line-height:1.8;color:var(--ink-2);}
  .card .card-foot{
    margin-top:auto;
    padding-top:14px;
    border-top:1px solid var(--line);
    font-size:13.5px;
    color:var(--brand);
    font-weight:600;
  }

  /* ---------- 图文区块 ---------- */
  .split{
    display:grid;
    gap:28px;
    grid-template-columns:1fr;
    align-items:center;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:24px;
    box-shadow:var(--shadow-1);
  }
  @media (min-width:768px){
    .split{grid-template-columns:1fr 1fr;gap:40px;padding:32px;}
  }
  .split-media{
    border-radius:14px;
    overflow:hidden;
    background:var(--brand-weak);
    aspect-ratio:16/10;
  }
  .split-media img{width:100%;height:100%;object-fit:cover;}
  .split-body h3{font-size:22px;font-weight:700;margin-bottom:12px;}
  .split-body p{font-size:15.5px;line-height:1.9;color:var(--ink-2);margin-bottom:16px;}
  .mini-list li{
    display:flex;
    gap:10px;
    align-items:flex-start;
    margin-bottom:10px;
    font-size:15px;
    line-height:1.7;
    color:var(--ink);
  }
  .mini-list li span.ic{
    flex-shrink:0;
    width:22px;height:22px;
    display:grid;place-items:center;
    border-radius:7px;
    background:var(--brand-weak);
    color:var(--brand);
    font-size:12px;
    font-weight:700;
    margin-top:3px;
  }

  /* ---------- 数据带 ---------- */
  .stats{
    background:linear-gradient(120deg,#1A66E0 0%,#2a7bec 100%);
    border-radius:var(--radius-lg);
    padding:32px 24px;
    box-shadow:0 18px 40px rgba(26,102,224,.22);
  }
  .stats-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:24px 12px;
  }
  @media (min-width:1024px){
    .stats-grid{grid-template-columns:repeat(4,1fr);gap:12px;}
  }
  .stat{
    text-align:center;
    padding:6px 6px;
  }
  .stat + .stat{border-left:1px solid rgba(255,255,255,.22);}
  @media (max-width:1023px){
    .stat:nth-child(odd){border-left:none;}
  }
  .stat-num{
    font-size:clamp(28px,3.4vw,38px);
    font-weight:700;
    color:#fff;
    line-height:1.15;
    font-variant-numeric:tabular-nums;
    letter-spacing:-.5px;
  }
  .stat-num small{font-size:15px;font-weight:600;margin-left:3px;}
  .stat-label{
    margin-top:8px;
    font-size:13px;
    color:rgba(255,255,255,.82);
    line-height:1.6;
  }

  /* ---------- FAQ ---------- */
  .faq{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-1);
  }
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    width:100%;
    padding:20px 24px;
    text-align:left;
    font-size:16.5px;
    font-weight:600;
    color:var(--ink);
    transition:background .2s ease-out,color .2s ease-out;
  }
  .faq-q:hover{background:rgba(232,240,254,.55);color:var(--brand);}
  .faq-icon{
    position:relative;
    flex-shrink:0;
    width:26px;
    height:26px;
    border-radius:50%;
    background:var(--brand-weak);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    width:12px;
    height:2px;
    border-radius:2px;
    background:var(--brand);
    transform:translate(-50%,-50%);
    transition:transform .25s ease-out,opacity .25s ease-out;
  }
  .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);}
  .faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(0);opacity:0;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s ease-out;
  }
  .faq-a p{
    padding:0 24px 22px;
    font-size:15px;
    line-height:1.85;
    color:var(--ink-2);
    max-width:860px;
  }
  .faq-item.open .faq-a{max-height:420px;}

  /* ---------- CTA 横条 ---------- */
  .cta-bar{
    display:grid;
    gap:22px;
    align-items:center;
    padding:32px 28px;
    background:linear-gradient(120deg,#E8F0FE 0%,#F6F9FF 62%,#FFF3EC 100%);
    border:1px solid #d9e6fd;
    border-radius:var(--radius-lg);
  }
  @media (min-width:1024px){
    .cta-bar{grid-template-columns:1fr auto;padding:40px 44px;}
  }
  .cta-bar h2{
    font-size:clamp(21px,2.6vw,28px);
    font-weight:700;
    line-height:1.35;
  }
  .cta-bar p{
    margin-top:10px;
    font-size:15.5px;
    color:var(--ink-2);
    line-height:1.8;
    max-width:640px;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  .privacy-note{
    margin-top:18px;
    font-size:13px;
    color:var(--ink-2);
    line-height:1.8;
  }
  .privacy-note a{color:var(--brand);font-weight:600;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:24px;
    background:#0E1B2E;
    color:#c8d4e6;
    padding:56px 0 26px;
  }
  .footer-grid{
    display:grid;
    gap:32px;
    grid-template-columns:1fr;
  }
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}}
  .footer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    font-weight:700;
    color:#fff;
    margin-bottom:14px;
  }
  .site-footer p{font-size:14px;line-height:1.85;color:#9fb0c8;}
  .site-footer h4{
    font-size:15px;
    font-weight:600;
    color:#fff;
    margin-bottom:16px;
  }
  .footer-list li{margin-bottom:10px;font-size:14px;}
  .footer-list a{color:#a9bacf;transition:color .2s ease-out;}
  .footer-list a:hover{color:#fff;}
  .site-footer .tag{
    background:rgba(255,255,255,.06);
    border-color:rgba(255,255,255,.14);
    color:#b7c6da;
  }
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
    align-items:center;
    margin-top:40px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;
    color:#8fa1ba;
  }

  /* ---------- 弹层 ---------- */
  .modal{
    position:fixed;
    inset:0;
    z-index:120;
    display:none;
  }
  .modal.open{display:block;}
  .modal-mask{
    position:absolute;
    inset:0;
    background:rgba(14,27,46,.5);
    backdrop-filter:blur(4px);
  }
  .modal-panel{
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    width:calc(100% - 32px);
    max-width:520px;
    max-height:88vh;
    overflow-y:auto;
    padding:28px;
    background:#fff;
    border-radius:var(--radius-lg);
    box-shadow:0 30px 70px rgba(10,25,50,.35);
  }
  @media (max-width:520px){
    .modal-panel{
      left:0;
      right:0;
      top:auto;
      bottom:0;
      transform:none;
      width:100%;
      max-width:none;
      border-radius:24px 24px 0 0;
      padding:22px 20px 26px;
    }
    .modal-panel::before{
      content:"";
      display:block;
      width:44px;
      height:4px;
      border-radius:99px;
      background:#dbe3ef;
      margin:-6px auto 14px;
    }
  }
  .modal-panel h3{font-size:20px;font-weight:700;margin-bottom:6px;}
  .modal-panel .modal-sub{font-size:14px;color:var(--ink-2);line-height:1.7;margin-bottom:20px;}
  .modal-close{
    position:absolute;
    right:16px;
    top:16px;
    width:34px;
    height:34px;
    border-radius:50%;
    background:#f1f5fb;
    color:var(--ink-2);
    font-size:18px;
    line-height:1;
    display:grid;
    place-items:center;
  }
  .modal-close:hover{background:var(--brand-weak);color:var(--brand);}
  .field{margin-bottom:14px;}
  .field label{
    display:block;
    margin-bottom:6px;
    font-size:13.5px;
    font-weight:600;
    color:var(--ink);
  }
  .field input,
  .field select,
  .field textarea{
    width:100%;
    padding:11px 14px;
    font-size:15px;
    font-family:inherit;
    color:var(--ink);
    background:#F7F9FD;
    border:1px solid var(--line);
    border-radius:12px;
    transition:border-color .2s ease-out,background .2s ease-out;
  }
  .field textarea{min-height:96px;resize:vertical;}
  .field input:focus,
  .field select:focus,
  .field textarea:focus{
    outline:none;
    border-color:var(--brand);
    background:#fff;
  }
  .agree{
    display:flex;
    gap:10px;
    align-items:flex-start;
    margin:4px 0 18px;
    font-size:13px;
    color:var(--ink-2);
    line-height:1.7;
  }
  .agree input{
    width:18px;
    height:18px;
    margin-top:2px;
    accent-color:var(--brand);
    flex-shrink:0;
  }
  .modal-panel .btn{width:100%;}

  .sr-only{
    position:absolute;
    width:1px;height:1px;
    padding:0;margin:-1px;
    overflow:hidden;
    clip:rect(0,0,0,0);
    white-space:nowrap;
    border:0;
  }