/* roulang page: index */
:root{
    --ink:#0F1B24;
    --ink-2:#54687A;
    --ink-3:#8A9AA8;
    --line:#E3EAF0;
    --line-soft:#EDF2F6;
    --paper:#F5F8FA;
    --card:#FFFFFF;
    --blue:#17557A;
    --blue-deep:#103F5C;
    --blue-soft:#EEF5FA;
    --blue-line:#B3CFE3;
    --amber:#E39A2E;
    --amber-deep:#C9861F;
    --ok:#2F9E7A;
    --warn:#C4553D;
    --r-card:16px;
    --r-img:12px;
    --r-pill:999px;
    --shadow-card:0 4px 18px rgba(16,63,92,.08);
    --shadow-hover:0 14px 34px rgba(16,63,92,.14);
    --shadow-nav:0 8px 28px rgba(16,63,92,.10);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    background:var(--paper);
    color:var(--ink);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;font-size:inherit;}
  h1,h2,h3,h4,p,figure,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}
  ::selection{background:rgba(23,85,122,.14);}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

  /* ============ 悬浮胶囊导航 ============ */
  .site-header{position:fixed;top:16px;left:0;right:0;z-index:90;padding:0 20px;transition:top .22s ease;}
  .site-header.is-scrolled{top:10px;}
  .nav-shell{
    max-width:1140px;margin:0 auto;position:relative;
    display:flex;align-items:center;gap:26px;
    padding:8px 10px 8px 20px;
    border-radius:var(--r-pill);
    background:rgba(255,255,255,.86);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border:1px solid var(--line);
    box-shadow:var(--shadow-nav);
    transition:background .22s ease, box-shadow .22s ease;
  }
  .site-header.is-scrolled .nav-shell{background:rgba(255,255,255,.96);box-shadow:var(--shadow-hover);}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:7px;background:var(--blue);}
  .brand-mark::after{content:"";position:absolute;right:5px;top:6px;width:6px;height:12px;border-radius:2px;background:#fff;opacity:.92;}
  .brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--blue-deep);white-space:nowrap;}

  .nav-menu{display:flex;align-items:center;gap:28px;margin-left:auto;}
  .nav-menu a{position:relative;display:inline-block;padding:8px 0;font-size:15px;color:var(--ink-2);transition:color .18s ease;}
  .nav-menu a::after{content:"";position:absolute;left:0;bottom:2px;height:2px;width:0;border-radius:2px;background:var(--blue);transition:width .18s ease;}
  .nav-menu a:hover{color:var(--blue);}
  .nav-menu a:hover::after{width:100%;}
  .nav-menu a[aria-current="page"]{color:var(--blue);font-weight:600;}
  .nav-menu a[aria-current="page"]::after{width:100%;}
  .nav-cta-item{display:none;}

  .nav-toggle{
    display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    width:44px;height:44px;margin-left:auto;border-radius:var(--r-pill);
    background:#fff;border:1px solid var(--line);cursor:pointer;transition:background .18s ease;
  }
  .nav-toggle:hover{background:var(--blue-soft);}
  .nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--blue);transition:transform .2s ease,opacity .2s ease;}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 28px;border-radius:var(--r-pill);
    font-size:15px;font-weight:600;line-height:1;cursor:pointer;
    border:1px solid transparent;transition:background .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn-primary{background:var(--amber);color:#1A1206;box-shadow:0 8px 20px rgba(227,154,46,.26);}
  .btn-primary:hover{background:var(--amber-deep);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18);}
  .btn-ghost{background:#fff;border-color:var(--blue-line);color:var(--blue);border-radius:var(--r-img);}
  .btn-ghost:hover{border-color:var(--blue);background:var(--blue-soft);}
  .btn:focus-visible{outline:2px solid var(--blue);outline-offset:3px;}
  .nav-cta{height:40px;padding:0 22px;font-size:14px;flex-shrink:0;}

  .link-more{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--blue);}
  .link-more em{font-style:normal;transition:transform .18s ease;}
  .link-more:hover em{transform:translateX(3px);}
  .link-more:focus-visible{outline:2px solid var(--blue);outline-offset:4px;border-radius:6px;}

  .badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;padding:4px 12px;border-radius:var(--r-pill);background:var(--blue-soft);color:var(--blue);}
  .badge-amber{background:rgba(227,154,46,.16);color:var(--amber-deep);}

  /* ============ 首屏 ============ */
  .hero{position:relative;overflow:hidden;padding:152px 0 100px;}
  .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center top;opacity:.5;}
  .hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(180deg,rgba(245,248,250,.88) 0%,rgba(245,248,250,.94) 58%,var(--paper) 100%);
  }
  .hero .container{position:relative;z-index:2;}
  .hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--blue);background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;}
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--amber);}
  .hero h1{
    margin:18px 0 18px;
    font-size:clamp(30px,4.2vw,52px);
    font-weight:700;line-height:1.15;letter-spacing:-.01em;color:var(--ink);
  }
  .hero-sub{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:520px;margin-bottom:30px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
  .hero-trust{display:flex;flex-wrap:wrap;gap:24px;font-size:14px;color:var(--ink-2);}
  .hero-trust li{display:flex;align-items:center;gap:8px;}
  .hero-trust li::before{
    content:"✓";display:inline-flex;align-items:center;justify-content:center;
    width:18px;height:18px;border-radius:50%;background:var(--blue-soft);
    color:var(--blue);font-size:11px;font-weight:700;line-height:1;
  }
  .hero-visual{position:relative;}
  .hero-photo{margin:0;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);background:#DCE7EF;aspect-ratio:16/11;}
  .hero-photo img{width:100%;height:100%;object-fit:cover;}
  .hero-float{
    position:absolute;left:-18px;bottom:-26px;width:min(290px,86%);
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:18px 20px;box-shadow:var(--shadow-hover);
  }
  .hero-float-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--blue-deep);margin-bottom:10px;}
  .hero-float-title::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--amber);}
  .hero-float ul{display:grid;gap:8px;font-size:13.5px;color:var(--ink-2);}
  .hero-float li{position:relative;padding-left:15px;}
  .hero-float li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:2px;background:var(--blue-line);}

  /* ============ 通用板块 ============ */
  .section{padding:96px 0;}
  .section-alt{background:#fff;}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:42px;}
  .section-head h2{
    position:relative;padding-left:18px;margin-bottom:12px;
    font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em;color:var(--ink);
  }
  .section-head h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:2px;background:var(--blue);}
  .section-sub{font-size:15.5px;color:var(--ink-2);max-width:640px;}

  /* ============ 流程时间线 ============ */
  .flow-track{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
  .flow-track::before{content:"";position:absolute;left:6%;right:6%;top:22px;height:2px;background:#D8E7F2;}
  .flow-node{position:relative;}
  .flow-dot{
    position:relative;z-index:1;display:flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:14px;background:var(--blue);color:#fff;
    font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
    box-shadow:0 6px 16px rgba(23,85,122,.22);
  }
  .flow-node.is-key .flow-dot{background:var(--amber);color:#1A1206;box-shadow:0 6px 16px rgba(227,154,46,.3);}
  .flow-node h3{font-size:18px;font-weight:600;margin:18px 0 8px;color:var(--ink);}
  .flow-node p{font-size:14.5px;line-height:1.75;color:var(--ink-2);}

  /* ============ 能力亮点 ============ */
  .cap-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch;}
  .cap-main,.cap-side{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease;}
  .cap-main:hover,.cap-side:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .cap-main{overflow:hidden;display:flex;flex-direction:column;}
  .cap-photo{margin:0;aspect-ratio:16/9;overflow:hidden;background:#DCE7EF;}
  .cap-photo img{width:100%;height:100%;object-fit:cover;}
  .cap-main-body{padding:26px 28px 30px;}
  .cap-main-body h3{font-size:21px;font-weight:600;margin:12px 0 12px;color:var(--ink);}
  .cap-main-body p{font-size:15px;line-height:1.85;color:var(--ink-2);}
  .cap-side{padding:28px;}
  .cap-side h3{font-size:20px;font-weight:600;margin-bottom:20px;color:var(--ink);}
  .cap-list{display:grid;gap:18px;}
  .cap-list li{position:relative;padding-left:20px;}
  .cap-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;background:var(--blue);opacity:.75;}
  .cap-list strong{display:block;font-size:15.5px;font-weight:600;color:var(--ink);margin-bottom:3px;}
  .cap-list span{font-size:14px;line-height:1.75;color:var(--ink-2);}
  .cap-strip{
    margin-top:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
    background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px 34px;box-shadow:var(--shadow-card);
  }
  .cap-strip > div + div{border-left:1px solid var(--line-soft);padding-left:24px;}
  .stat-num{font-size:34px;font-weight:700;line-height:1.1;color:var(--blue);font-variant-numeric:tabular-nums;}
  .stat-label{font-size:14px;color:var(--ink-2);margin-top:8px;}

  /* ============ 方案对比 ============ */
  .plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
  .plan{
    position:relative;overflow:hidden;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:30px 24px 26px;box-shadow:var(--shadow-card);
    transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .plan::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:var(--blue-soft);}
  .plan:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .plan.is-featured{border:2px solid var(--amber);box-shadow:var(--shadow-hover);margin-top:-8px;}
  .plan.is-featured::before{background:var(--amber);}
  .plan h3{font-size:20px;font-weight:700;margin:14px 0 10px;color:var(--ink);}
  .plan-desc{font-size:14.5px;line-height:1.75;color:var(--ink-2);min-height:52px;}
  .plan-divider{height:1px;background:var(--line-soft);margin:20px 0;}
  .plan-list{display:grid;gap:12px;font-size:14.5px;color:var(--ink-2);margin-bottom:26px;}
  .plan-list li{position:relative;padding-left:26px;line-height:1.7;}
  .plan-list li::before{
    content:"✓";position:absolute;left:0;top:1px;
    display:inline-flex;align-items:center;justify-content:center;
    width:18px;height:18px;border-radius:50%;background:var(--blue-soft);color:var(--blue);
    font-size:11px;font-weight:700;line-height:1;
  }
  .plan .btn{width:100%;}

  /* ============ 最新信息 ============ */
  .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .news-card{
    display:flex;flex-direction:column;gap:12px;height:100%;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--shadow-card);
    transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--blue-line);}
  .news-card:focus-visible{outline:2px solid var(--blue);outline-offset:3px;}
  .news-card h3{font-size:17.5px;font-weight:600;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .news-card p{font-size:14px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--ink-3);}
  .news-meta .arrow{color:var(--blue);font-weight:600;transition:transform .18s ease;}
  .news-card:hover .news-meta .arrow{transform:translateX(3px);}
  .empty-state{
    min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
    text-align:center;padding:36px 24px;background:#fff;border:1px dashed #C9D9E5;border-radius:var(--r-card);
  }
  .empty-state p{font-size:15px;color:var(--ink-2);}

  /* ============ FAQ ============ */
  .faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    min-height:56px;padding:18px 24px;cursor:pointer;
    font-size:16px;font-weight:600;color:var(--ink);list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{content:"+";flex-shrink:0;font-size:20px;line-height:1;color:var(--blue);transition:transform .2s ease;}
  .faq-item[open]{border-color:var(--blue-line);box-shadow:var(--shadow-card);}
  .faq-item[open] summary::after{transform:rotate(45deg);}
  .faq-item summary:focus-visible{outline:2px solid var(--blue);outline-offset:-3px;border-radius:var(--r-card);}
  .faq-answer{padding:0 24px 24px;font-size:15px;line-height:1.9;color:var(--ink-2);}

  /* ============ 结尾 CTA ============ */
  .cta-band{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
    background:var(--blue-soft);border-radius:24px;padding:48px 52px;
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3;color:var(--blue-deep);margin-bottom:10px;}
  .cta-band p{font-size:15.5px;color:var(--ink-2);max-width:560px;}

  /* ============ 页脚 ============ */
  .site-footer{margin-top:96px;background:var(--blue-deep);color:#fff;border-radius:24px 24px 0 0;padding:64px 0 26px;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
  .footer-brand .brand-text{color:#fff;}
  .footer-brand .brand-mark{background:#fff;}
  .footer-brand .brand-mark::after{background:var(--blue-deep);}
  .footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin:16px 0 18px;max-width:280px;}
  .domain-chip{display:inline-block;font-size:13px;letter-spacing:.04em;padding:6px 14px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.22);color:var(--blue-line);}
  .footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
  .footer-col ul{display:grid;gap:11px;font-size:14px;color:rgba(255,255,255,.72);}
  .footer-col a{color:rgba(255,255,255,.72);transition:color .18s ease;}
  .footer-col a:hover{color:var(--blue-line);text-decoration:underline;}
  .footer-col a:focus-visible{outline:2px solid var(--blue-line);outline-offset:3px;border-radius:4px;}
  .footer-bottom{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
    padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:rgba(255,255,255,.58);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1023px){
    .container{padding:0 24px;}
    .hero{padding:132px 0 84px;}
    .hero-grid{grid-template-columns:1fr;gap:44px;}
    .hero-sub{max-width:none;}
    .cap-grid{grid-template-columns:1fr;}
    .plans{grid-template-columns:1fr;max-width:560px;margin:0 auto;}
    .plan.is-featured{margin-top:0;}
    .news-grid{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
    .section{padding:72px 0;}
    .cta-band{padding:40px 36px;}
  }
  @media (max-width:860px){
    .nav-menu{display:none;}
    .nav-toggle{display:flex;}
    .nav-cta{display:none;}
    .nav-menu.is-open{
      position:absolute;left:0;right:0;top:calc(100% + 10px);
      display:flex;flex-direction:column;align-items:stretch;gap:0;margin:0;
      background:#fff;border:1px solid var(--line);border-radius:20px;
      box-shadow:var(--shadow-hover);padding:10px;
    }
    .nav-menu.is-open li{border-bottom:1px solid var(--line-soft);}
    .nav-menu.is-open li:last-child{border-bottom:0;}
    .nav-menu.is-open a{display:flex;align-items:center;min-height:48px;padding:0 14px;font-size:16px;border-radius:12px;}
    .nav-menu.is-open a::after{display:none;}
    .nav-menu.is-open a[aria-current="page"]{background:var(--blue-soft);}
    .nav-menu.is-open .nav-cta-item{display:block;border-bottom:0;padding-top:8px;}
    .nav-menu.is-open .nav-cta-item .btn{width:100%;}
  }
  @media (max-width:767px){
    .container{padding:0 20px;}
    .section{padding:56px 0;}
    .hero{padding:118px 0 64px;}
    .hero-float{position:static;width:100%;margin-top:16px;}
    .hero-actions{gap:12px;}
    .hero-actions .btn{flex:1 1 auto;}
    .hero-trust{gap:16px 20px;font-size:13.5px;}
    .flow-track{grid-template-columns:1fr;gap:0;}
    .flow-track::before{left:21px;right:auto;top:0;bottom:34px;width:2px;height:auto;}
    .flow-node{padding-left:64px;padding-bottom:30px;}
    .flow-node .flow-dot{position:absolute;left:0;top:0;}
    .flow-node h3{margin-top:6px;}
    .news-grid{grid-template-columns:1fr;}
    .cap-strip{grid-template-columns:1fr;gap:20px;padding:26px 22px;}
    .cap-strip > div + div{border-left:0;padding-left:0;border-top:1px solid var(--line-soft);padding-top:20px;}
    .cta-band{padding:32px 24px;border-radius:20px;}
    .cta-band .btn{width:100%;}
    .faq-item summary{padding:16px 18px;font-size:15px;gap:14px;}
    .faq-answer{padding:0 18px 20px;font-size:14.5px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .site-footer{margin-top:64px;border-radius:20px 20px 0 0;padding:48px 0 24px;}
    .brand-text{font-size:15.5px;}
    .cap-main-body{padding:22px 20px 26px;}
    .cap-side{padding:22px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: article */
:root{
    --brand:#17557A;
    --brand-deep:#103F5C;
    --brand-soft:#EEF5FA;
    --brand-line:#B3CFE3;
    --amber:#E39A2E;
    --amber-dark:#C9861F;
    --amber-ink:#1A1206;
    --bg:#F5F8FA;
    --card:#FFFFFF;
    --ink:#0F1B24;
    --muted:#54687A;
    --faint:#8A9AA8;
    --line:#E3EAF0;
    --line-soft:#EDF2F6;
    --ok:#2F9E7A;
    --warn:#C4553D;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:20px;
    --r-xl:24px;
    --r-pill:999px;
    --shadow-card:0 4px 18px rgba(16,63,92,.08);
    --shadow-hover:0 14px 34px rgba(16,63,92,.14);
    --shadow-nav:0 8px 28px rgba(16,63,92,.10);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    padding-top:104px;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:17px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:none;}
  a{color:var(--brand);text-decoration:none;}
  a:hover{color:var(--brand-deep);}
  button{font-family:inherit;}
  ul,ol{padding-left:0;margin:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  ::selection{background:rgba(227,154,46,.28);}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 32px;
  }

  /* ============ 悬浮胶囊导航 ============ */
  .site-header{
    position:fixed;
    top:16px;
    left:0;
    right:0;
    z-index:60;
    padding:0 24px;
    transition:top .25s ease;
  }
  .site-header.is-scrolled{top:10px;}
  .nav-shell{
    max-width:1140px;
    margin:0 auto;
    display:flex;
    align-items:center;
    gap:24px;
    padding:10px 12px 10px 20px;
    border-radius:var(--r-pill);
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    box-shadow:var(--shadow-nav);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:box-shadow .25s ease,background .25s ease;
  }
  .is-scrolled .nav-shell{
    background:rgba(255,255,255,.96);
    box-shadow:var(--shadow-hover);
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    color:var(--brand-deep);
    font-weight:700;
    font-size:17px;
    letter-spacing:-.01em;
    white-space:nowrap;
  }
  .brand:hover{color:var(--brand);}
  .brand-mark{
    width:24px;
    height:24px;
    border-radius:7px;
    background:var(--brand);
    position:relative;
    flex:0 0 auto;
  }
  .brand-mark::after{
    content:"";
    position:absolute;
    right:4px;
    top:50%;
    transform:translateY(-50%);
    width:7px;
    height:11px;
    background:#fff;
    border-radius:2px;
  }
  .brand-text{display:inline-block;}
  .nav-menu{
    display:flex;
    align-items:center;
    gap:26px;
    margin-left:auto;
    margin-right:6px;
  }
  .nav-menu > li > a{
    position:relative;
    display:inline-block;
    padding:8px 2px;
    color:var(--muted);
    font-size:15px;
    font-weight:500;
    transition:color .18s ease;
  }
  .nav-menu > li > a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:2px;
    width:0;
    height:2px;
    border-radius:2px;
    background:var(--brand);
    transition:width .18s ease;
  }
  .nav-menu > li > a:hover{color:var(--brand);}
  .nav-menu > li > a:hover::after{width:100%;}
  .nav-menu > li > a[aria-current="page"]{color:var(--brand);font-weight:600;}
  .nav-menu > li > a[aria-current="page"]::after{width:100%;}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 26px;
    border-radius:var(--r-pill);
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    line-height:1;
    cursor:pointer;
    transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease;
    white-space:nowrap;
  }
  .btn:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
  }
  .btn-primary{
    background:var(--amber);
    color:var(--amber-ink);
    box-shadow:0 6px 16px rgba(227,154,46,.26);
  }
  .btn-primary:hover{background:var(--amber-dark);color:var(--amber-ink);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(26,18,6,.22);}
  .btn-ghost{
    background:#fff;
    color:var(--brand);
    border:1px solid var(--brand-line);
    border-radius:var(--r-sm);
  }
  .btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-deep);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-light{
    background:#fff;
    color:var(--brand-deep);
    border-radius:var(--r-sm);
    border:1px solid rgba(255,255,255,.6);
  }
  .btn-light:hover{background:var(--brand-soft);color:var(--brand-deep);}
  .nav-cta{margin-left:auto;}
  .nav-toggle{
    display:none;
    width:44px;
    height:44px;
    margin-left:auto;
    padding:0;
    border:1px solid var(--line);
    border-radius:var(--r-sm);
    background:#fff;
    cursor:pointer;
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:5px;
  }
  .nav-toggle span{
    display:block;
    width:18px;
    height:2px;
    border-radius:2px;
    background:var(--brand-deep);
    transition:transform .2s ease,opacity .2s ease;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ============ 面包屑 ============ */
  .crumb-bar{
    padding:8px 0 0;
    font-size:14px;
    color:var(--faint);
    line-height:1.6;
  }
  .crumb-bar ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;}
  .crumb-bar li{display:inline-flex;align-items:center;gap:6px;min-width:0;}
  .crumb-bar li + li::before{content:"/";color:var(--line);}
  .crumb-bar a{color:var(--muted);}
  .crumb-bar a:hover{color:var(--brand);text-decoration:underline;}
  .crumb-current{
    color:var(--muted);
    max-width:340px;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
  }

  /* ============ 文章头部 ============ */
  .article-head{
    padding:22px 0 34px;
    border-bottom:1px solid var(--line);
  }
  .badge-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;}
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:var(--r-pill);
    background:var(--brand-soft);
    color:var(--brand);
    font-size:13px;
    font-weight:600;
    line-height:1.6;
  }
  .badge-amber{background:rgba(227,154,46,.16);color:#8A5A0C;}
  .badge-line{background:#fff;border:1px solid var(--line);color:var(--muted);font-weight:500;}
  h1.article-title{
    font-size:clamp(26px,3.6vw,40px);
    font-weight:700;
    line-height:1.28;
    letter-spacing:-.01em;
    color:var(--ink);
    max-width:900px;
  }
  .article-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    margin-top:18px;
    font-size:14px;
    color:var(--faint);
    font-variant-numeric:tabular-nums;
  }
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line);display:inline-block;}
  .head-note{
    margin-top:18px;
    max-width:720px;
    font-size:15px;
    color:var(--muted);
    line-height:1.8;
  }

  /* ============ 主体两栏 ============ */
  .article-main{padding:46px 0 20px;}
  .article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 336px;
    gap:48px;
    align-items:start;
  }

  .article-body{
    max-width:720px;
    font-size:17px;
    line-height:1.9;
    color:#1B2A36;
    word-break:break-word;
  }
  .article-body > *:first-child{margin-top:0;}
  .article-body p{margin:0 0 20px;}
  .article-body h2{
    position:relative;
    margin:40px 0 16px;
    padding-left:16px;
    font-size:clamp(21px,2.2vw,26px);
    font-weight:700;
    line-height:1.4;
    color:var(--ink);
  }
  .article-body h2::before{
    content:"";
    position:absolute;
    left:0;
    top:6px;
    width:4px;
    height:22px;
    border-radius:2px;
    background:var(--brand);
  }
  .article-body h3{
    margin:28px 0 12px;
    font-size:19px;
    font-weight:600;
    line-height:1.5;
    color:var(--brand-deep);
  }
  .article-body h4{
    margin:22px 0 10px;
    font-size:17px;
    font-weight:600;
    color:var(--ink);
  }
  .article-body ul,.article-body ol{
    margin:0 0 20px;
    padding-left:22px;
    list-style:disc;
  }
  .article-body ol{list-style:decimal;}
  .article-body li{margin-bottom:10px;}
  .article-body li::marker{color:var(--brand);}
  .article-body blockquote{
    margin:24px 0;
    padding:18px 22px;
    border-left:3px solid var(--amber);
    background:var(--bg);
    border-radius:0 var(--r-sm) var(--r-sm) 0;
    color:var(--muted);
  }
  .article-body blockquote p:last-child{margin-bottom:0;}
  .article-body img{
    border-radius:var(--r-sm);
    margin:24px 0 10px;
  }
  .article-body figure{margin:24px 0;}
  .article-body figcaption{
    margin-top:8px;
    font-size:13px;
    color:var(--faint);
    text-align:center;
  }
  .article-body a{
    color:var(--brand);
    border-bottom:1px solid rgba(23,85,122,.28);
  }
  .article-body a:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep);}
  .article-body table{
    width:100%;
    display:block;
    overflow-x:auto;
    border-collapse:collapse;
    margin:22px 0;
    font-size:15px;
    border:1px solid var(--line);
    border-radius:var(--r-sm);
  }
  .article-body th,.article-body td{
    padding:11px 14px;
    border-bottom:1px solid var(--line-soft);
    text-align:left;
  }
  .article-body th{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;}
  .article-body tbody tr:nth-child(even){background:#F9FBFC;}
  .article-body strong{color:var(--brand-deep);font-weight:600;}
  .article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0;}

  .empty-state{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-card);
    padding:44px 28px;
    text-align:center;
  }
  .empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px;padding-left:0;}
  .empty-state h2::before{display:none;}
  .empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px;}

  /* ============ 侧栏 ============ */
  .side-stack{
    position:sticky;
    top:110px;
    display:flex;
    flex-direction:column;
    gap:20px;
  }
  .side-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-card);
    padding:22px;
  }
  .side-title{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    font-weight:700;
    color:var(--brand-deep);
    letter-spacing:.02em;
    margin-bottom:14px;
  }
  .side-title::before{
    content:"";
    width:6px;
    height:6px;
    border-radius:2px;
    background:var(--amber);
  }
  .toc-list{display:flex;flex-direction:column;gap:2px;counter-reset:toc;}
  .toc-list a{
    display:block;
    padding:7px 10px 7px 12px;
    border-left:2px solid var(--line);
    font-size:14px;
    line-height:1.6;
    color:var(--muted);
    transition:color .18s ease,border-color .18s ease,background .18s ease;
  }
  .toc-list a:hover{
    color:var(--brand);
    border-left-color:var(--brand);
    background:var(--brand-soft);
  }
  .side-note{
    background:var(--brand-deep);
    color:#E6F0F7;
    border:none;
    border-radius:var(--r-md);
    box-shadow:0 10px 26px rgba(16,63,92,.22);
    padding:24px;
  }
  .side-note h3{
    font-size:17px;
    font-weight:700;
    color:#fff;
    margin-bottom:10px;
  }
  .side-note p{
    font-size:14px;
    line-height:1.85;
    color:rgba(230,240,247,.82);
    margin-bottom:18px;
  }
  .side-note .btn{width:100%;height:44px;font-size:14px;}

  .rel-list{display:flex;flex-direction:column;}
  .rel-list a{
    display:flex;
    align-items:flex-start;
    gap:10px;
    padding:12px 0;
    border-bottom:1px solid var(--line-soft);
    color:var(--ink);
    font-size:14px;
    line-height:1.65;
    transition:color .18s ease;
  }
  .rel-list a:last-child{border-bottom:none;padding-bottom:0;}
  .rel-list a:first-child{padding-top:0;}
  .rel-list a:hover{color:var(--brand);}
  .rel-list .arrow{
    margin-left:auto;
    color:var(--brand-line);
    transition:transform .18s ease,color .18s ease;
    flex:0 0 auto;
  }
  .rel-list a:hover .arrow{transform:translateX(3px);color:var(--brand);}

  /* ============ 底部标签与前后导航 ============ */
  .article-foot{
    max-width:720px;
    margin-top:44px;
    padding-top:26px;
    border-top:1px solid var(--line);
  }
  .tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:28px;}
  .tag-row span.label{font-size:13px;color:var(--faint);margin-right:4px;}
  .pn-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:16px;
  }
  .pn-card{
    display:flex;
    flex-direction:column;
    gap:8px;
    padding:20px 22px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-card);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .pn-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-hover);
    border-color:var(--brand-line);
  }
  .pn-card:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
  .pn-label{font-size:13px;color:var(--faint);}
  .pn-title{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:16px;
    font-weight:600;
    color:var(--brand-deep);
    line-height:1.5;
  }
  .pn-card.next{align-items:flex-end;text-align:right;}
  .pn-card.next .pn-title{justify-content:flex-end;color:var(--brand);}
  .back-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    margin-top:22px;
    font-size:15px;
    font-weight:600;
    color:var(--brand);
  }
  .back-link span{transition:transform .18s ease;}
  .back-link:hover span{transform:translateX(-3px);}

  /* ============ 相关内容 ============ */
  .related-section{padding:72px 0 0;}
  .section-head{
    display:flex;
    flex-wrap:wrap;
    align-items:flex-end;
    justify-content:space-between;
    gap:16px;
    margin-bottom:32px;
  }
  .section-head h2{
    position:relative;
    padding-left:16px;
    font-size:clamp(22px,2.6vw,30px);
    font-weight:700;
    line-height:1.3;
    color:var(--ink);
  }
  .section-head h2::before{
    content:"";
    position:absolute;
    left:0;
    top:7px;
    width:4px;
    height:22px;
    border-radius:2px;
    background:var(--brand);
  }
  .section-head p{font-size:15px;color:var(--muted);max-width:520px;margin-top:8px;}
  .text-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:15px;
    font-weight:600;
    color:var(--brand);
  }
  .text-link span{transition:transform .18s ease;}
  .text-link:hover span{transform:translateX(3px);}

  .card-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
  }
  .card{
    display:flex;
    flex-direction:column;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-card);
    overflow:hidden;
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-line);}
  .card:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
  .card-thumb{
    position:relative;
    aspect-ratio:16/9;
    overflow:hidden;
    background:linear-gradient(135deg,#DCE9F1,#EEF5FA);
  }
  .card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .card:hover .card-thumb img{transform:scale(1.04);}
  .card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
  .card-body h3{
    font-size:17px;
    font-weight:600;
    line-height:1.55;
    color:var(--ink);
  }
  .card-body p{
    font-size:14px;
    line-height:1.75;
    color:var(--muted);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .card-foot{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    margin-top:auto;
    padding-top:14px;
    border-top:1px solid var(--line-soft);
    font-size:13px;
    color:var(--faint);
    font-variant-numeric:tabular-nums;
  }
  .card-foot .arrow{color:var(--brand);transition:transform .18s ease;}
  .card:hover .card-foot .arrow{transform:translateX(3px);}

  /* ============ CTA 带 ============ */
  .cta-section{padding:72px 0 0;}
  .cta-band{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    padding:40px 44px;
    background:var(--brand-soft);
    border:1px solid #DCEAF4;
    border-radius:var(--r-xl);
  }
  .cta-band h2{
    font-size:clamp(21px,2.4vw,27px);
    font-weight:700;
    line-height:1.35;
    color:var(--brand-deep);
    margin-bottom:8px;
  }
  .cta-band p{font-size:15px;color:var(--muted);line-height:1.8;max-width:560px;}

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:88px;
    background:var(--brand-deep);
    color:#fff;
    border-radius:var(--r-xl) var(--r-xl) 0 0;
    padding:56px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:40px;
  }
  .footer-brand .brand{color:#fff;font-size:17px;}
  .footer-brand .brand:hover{color:#B3CFE3;}
  .footer-brand .brand-mark{background:#fff;}
  .footer-brand .brand-mark::after{background:var(--brand);}
  .footer-desc{
    margin-top:14px;
    font-size:14px;
    line-height:1.8;
    color:rgba(255,255,255,.72);
    max-width:280px;
  }
  .domain-chip{
    display:inline-block;
    margin-top:16px;
    padding:5px 12px;
    border-radius:var(--r-pill);
    background:rgba(255,255,255,.1);
    border:1px solid rgba(255,255,255,.16);
    font-size:13px;
    color:rgba(255,255,255,.8);
    letter-spacing:.02em;
  }
  .footer-col h4{
    font-size:14px;
    font-weight:600;
    color:#fff;
    margin-bottom:16px;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col li,.footer-col a{
    font-size:14px;
    color:rgba(255,255,255,.72);
    line-height:1.7;
  }
  .footer-col a:hover{color:#B3CFE3;text-decoration:underline;}
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    margin-top:40px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;
    color:rgba(255,255,255,.6);
    font-variant-numeric:tabular-nums;
  }
  .footer-bottom span:last-child{text-align:right;}

  /* ============ 响应式 ============ */
  @media (max-width:1024px){
    .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;}
    .side-stack{position:static;top:auto;display:grid;grid-template-columns:1fr 1fr;gap:16px;}
    .side-note{grid-column:1 / -1;}
    .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:900px){
    body{padding-top:96px;}
    .nav-menu{
      position:absolute;
      top:calc(100% + 10px);
      left:0;
      right:0;
      display:none;
      flex-direction:column;
      align-items:stretch;
      gap:4px;
      margin:0;
      padding:12px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--r-lg);
      box-shadow:var(--shadow-hover);
    }
    .nav-menu.is-open{display:flex;}
    .nav-menu > li > a{
      display:block;
      padding:12px 14px;
      height:48px;
      line-height:24px;
      border-radius:var(--r-sm);
      font-size:15px;
    }
    .nav-menu > li > a::after{display:none;}
    .nav-menu > li > a:hover,.nav-menu > li > a[aria-current="page"]{background:var(--brand-soft);}
    .nav-menu > li > a[aria-current="page"]{font-weight:600;}
    .nav-cta-item{display:block;margin-top:8px;}
    .nav-cta-item .btn{width:100%;}
    .nav-cta{display:none;}
    .nav-toggle{display:flex;}
    .nav-shell{position:relative;}
    .container{padding:0 24px;}
  }
  @media (max-width:768px){
    body{padding-top:88px;font-size:16px;}
    .article-main{padding:34px 0 10px;}
    .article-head{padding:18px 0 26px;}
    .article-body{font-size:16px;line-height:1.88;}
    .side-stack{grid-template-columns:1fr;}
    .card-grid{grid-template-columns:1fr;}
    .pn-grid{grid-template-columns:1fr;}
    .pn-card.next{align-items:flex-start;text-align:left;}
    .pn-card.next .pn-title{justify-content:flex-start;}
    .cta-band{padding:28px;flex-direction:column;align-items:flex-start;}
    .cta-band .btn{width:100%;}
    .related-section,.cta-section{padding-top:52px;}
    .site-footer{margin-top:64px;padding:40px 0 24px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .footer-bottom span:last-child{text-align:left;}
    .crumb-current{max-width:180px;}
  }
  @media (max-width:520px){
    .container{padding:0 20px;}
    .site-header{padding:0 16px;}
    .brand-text{font-size:15px;max-width:180px;overflow:hidden;text-overflow:ellipsis;}
    .btn{height:46px;padding:0 20px;font-size:14px;}
    .article-body h2{padding-left:14px;}
    .section-head h2{padding-left:14px;}
    .side-card{padding:18px;}
    .side-note{padding:20px;}
    .card-body{padding:18px;}
    .badge{font-size:12px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;}
  }

/* roulang page: category1 */
:root{
    --blue:#17557A;
    --blue-deep:#103F5C;
    --amber:#E39A2E;
    --amber-deep:#C9861F;
    --bg:#F5F8FA;
    --card:#FFFFFF;
    --ink:#0F1B24;
    --muted:#54687A;
    --muted-3:#8A9AA8;
    --line:#E3EAF0;
    --line-soft:#EDF2F6;
    --tint:#EEF5FA;
    --border-blue:#B3CFE3;
    --ok:#2F9E7A;
    --warn:#C4553D;
    --r12:12px;
    --r16:16px;
    --r20:20px;
    --r24:24px;
    --rpill:999px;
    --shadow-card:0 4px 18px rgba(16,63,92,.08);
    --shadow-hover:0 14px 34px rgba(16,63,92,.14);
    --shadow-nav:0 8px 28px rgba(16,63,92,.10);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body.page-body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  .page-body img{max-width:100%;display:block;}
  .page-body a{color:var(--blue);text-decoration:none;}
  .page-body ul,.page-body ol{margin:0;padding:0;list-style:none;}
  .page-body h1,.page-body h2,.page-body h3,.page-body h4{margin:0;line-height:1.25;font-weight:700;}
  .page-body p{margin:0;}
  .page-body button{font-family:inherit;}
  .skip-link{
    position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;
    padding:10px 18px;border-radius:0 0 var(--r12) 0;z-index:200;
  }
  .skip-link:focus{left:0;}
  .page-body .container{
    width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px;
  }
  .page-main{display:block;}

  /* ============ 悬浮胶囊导航 ============ */
  .site-header{
    position:fixed;top:16px;left:0;right:0;z-index:90;
    padding:0 20px;
    transition:top .25s ease;
  }
  .site-header.is-scrolled{top:10px;}
  .nav-shell{
    position:relative;
    max-width:1140px;margin:0 auto;
    display:flex;align-items:center;gap:14px;
    padding:10px 12px 10px 20px;
    background:rgba(255,255,255,.86);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border:1px solid var(--line);
    border-radius:var(--rpill);
    box-shadow:var(--shadow-nav);
    transition:background .25s ease,box-shadow .25s ease;
  }
  .site-header.is-scrolled .nav-shell{
    background:rgba(255,255,255,.96);
    box-shadow:0 12px 34px rgba(16,63,92,.16);
  }
  .brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
  .brand-mark{
    position:relative;width:24px;height:24px;border-radius:7px;
    background:var(--blue);flex:0 0 auto;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);
  }
  .brand-mark::after{
    content:"";position:absolute;right:5px;top:7px;width:8px;height:10px;
    background:var(--bg);border-radius:2px;
  }
  .brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}
  .nav-menu{
    display:flex;align-items:center;gap:2px;margin-left:auto;
  }
  .nav-menu > li > a:not(.btn){
    position:relative;display:inline-block;
    padding:8px 12px;font-size:15px;color:var(--muted);
    border-radius:var(--r12);
    transition:color .18s ease;
  }
  .nav-menu > li > a:not(.btn)::after{
    content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
    background:var(--blue);border-radius:2px;
    transform:scaleX(0);transform-origin:left center;
    transition:transform .18s ease;
  }
  .nav-menu > li > a:not(.btn):hover{color:var(--blue);}
  .nav-menu > li > a:not(.btn):hover::after{transform:scaleX(1);}
  .nav-menu > li > a[aria-current="page"]{color:var(--blue);font-weight:600;}
  .nav-menu > li > a[aria-current="page"]::after{transform:scaleX(1);}
  .nav-menu > li > a:focus-visible{outline:2px solid var(--blue);outline-offset:2px;}
  .nav-cta-item{display:none;}
  .nav-toggle{
    display:none;width:44px;height:44px;border:1px solid var(--line);
    background:#fff;border-radius:var(--r12);cursor:pointer;
    padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--blue);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .nav-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:2px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 28px;border-radius:var(--rpill);
    font-size:15px;font-weight:600;line-height:1;
    border:1px solid transparent;cursor:pointer;
    text-decoration:none;white-space:nowrap;
    transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
  }
  .btn-primary{background:var(--amber);color:#1A1206;box-shadow:0 6px 18px rgba(227,154,46,.26);}
  .btn-primary:hover{background:var(--amber-deep);color:#1A1206;transform:translateY(-1px);box-shadow:0 10px 24px rgba(227,154,46,.32);}
  .btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18);}
  .btn-ghost{background:#fff;color:var(--blue);border-color:var(--border-blue);border-radius:var(--r12);}
  .btn-ghost:hover{background:var(--tint);border-color:var(--blue);}
  .btn-ghost:active{background:#E4EFF7;}
  .btn-link{
    display:inline-flex;align-items:center;gap:8px;color:var(--blue);
    font-size:15px;font-weight:600;padding:6px 0;
  }
  .btn-link .arrow{transition:transform .18s ease;display:inline-block;}
  .btn-link:hover .arrow{transform:translateX(3px);}
  .btn:focus-visible,.btn-link:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:var(--r12);}
  .btn[disabled]{opacity:.45;cursor:not-allowed;}

  /* ============ 页头 ============ */
  .page-hero{
    position:relative;
    padding:118px 0 56px;
    background-image:linear-gradient(rgba(245,248,250,.88),rgba(245,248,250,.88)),url('/assets/images/backpic/back-1.png');
    background-size:cover;
    background-position:center;
    border-bottom:1px solid var(--line-soft);
  }
  .breadcrumb{
    display:flex;align-items:center;flex-wrap:wrap;gap:8px;
    font-size:14px;color:var(--muted-3);margin-bottom:12px;
  }
  .breadcrumb a{color:var(--muted);}
  .breadcrumb a:hover{color:var(--blue);text-decoration:underline;}
  .breadcrumb span[aria-current]{color:var(--muted);}
  .hero-head-grid{
    display:grid;grid-template-columns:minmax(0,1fr) 320px;
    gap:40px;align-items:end;
  }
  .page-hero h1{
    font-size:clamp(30px,4vw,46px);
    letter-spacing:-.01em;line-height:1.18;color:var(--ink);
    max-width:760px;
  }
  .hero-sub{
    margin-top:18px;font-size:17px;color:var(--muted);max-width:640px;
  }
  .hero-badge-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r16);
    padding:20px 22px;box-shadow:var(--shadow-card);
  }
  .hero-badge-card .hb-label{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.04em;color:var(--blue);
    background:var(--tint);border-radius:var(--rpill);padding:4px 12px;
  }
  .hero-badge-card .hb-value{
    display:block;margin-top:12px;font-size:26px;font-weight:700;color:var(--blue);
    font-variant-numeric:tabular-nums;line-height:1.2;
  }
  .hero-badge-card .hb-note{margin-top:6px;font-size:14px;color:var(--muted);}

  /* ============ 通用板块 ============ */
  .section{padding:88px 0;}
  .section-head{max-width:720px;margin-bottom:36px;}
  .section-head h2{
    position:relative;padding-left:16px;
    font-size:clamp(24px,3vw,34px);line-height:1.28;color:var(--ink);
  }
  .section-head h2::before{
    content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;
    background:var(--blue);border-radius:2px;
  }
  .section-head p{margin-top:12px;color:var(--muted);font-size:16px;max-width:640px;}

  /* ============ 主从布局 ============ */
  .split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:40px;align-items:start;}

  /* ============ 时间线 ============ */
  .timeline{position:relative;padding-left:60px;}
  .timeline::before{
    content:"";position:absolute;left:19px;top:12px;bottom:12px;width:2px;
    background:#D8E7F2;border-radius:2px;
  }
  .step{position:relative;padding-bottom:28px;}
  .step:last-child{padding-bottom:0;}
  .step-num{
    position:absolute;left:-60px;top:0;
    width:40px;height:40px;border-radius:var(--r12);
    background:var(--blue);color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
    box-shadow:0 6px 16px rgba(23,85,122,.22);
  }
  .step.is-key .step-num{box-shadow:0 0 0 2px var(--amber),0 6px 16px rgba(23,85,122,.22);}
  .step-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r16);
    padding:24px;box-shadow:var(--shadow-card);
    transition:box-shadow .2s ease,transform .2s ease;
  }
  .step-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .step-card h3{font-size:20px;color:var(--ink);}
  .step-card p{margin-top:10px;color:var(--muted);font-size:15.5px;line-height:1.85;}
  .step-figure{margin-top:16px;border-radius:var(--r12);overflow:hidden;border:1px solid var(--line-soft);}
  .step-figure img{width:100%;height:auto;object-fit:cover;aspect-ratio:16/9;}
  .step-figure figcaption{
    font-size:13px;color:var(--muted-3);padding:8px 12px;background:#fff;text-align:center;
    border-top:1px solid var(--line-soft);
  }
  .step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;line-height:1;padding:6px 12px;border-radius:var(--rpill);
    background:var(--tint);color:var(--blue);font-weight:600;
  }
  .badge-amber{background:#FDF3E3;color:#8A5A12;}

  /* ============ 侧栏 ============ */
  .side{position:sticky;top:100px;display:flex;flex-direction:column;gap:18px;}
  .side-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r16);
    padding:20px;box-shadow:var(--shadow-card);
  }
  .side-card h3{font-size:15px;color:var(--ink);letter-spacing:.01em;}
  .side-card h3 + *{margin-top:12px;}
  .side-nav li + li{margin-top:4px;}
  .side-nav a{
    display:flex;align-items:center;gap:8px;
    padding:8px 10px;border-radius:var(--r12);font-size:14px;color:var(--muted);
    transition:background .18s ease,color .18s ease;
  }
  .side-nav a::before{
    content:"";width:6px;height:6px;border-radius:2px;background:var(--border-blue);flex:0 0 auto;
  }
  .side-nav a:hover{background:var(--tint);color:var(--blue);}
  .side-nav a:hover::before{background:var(--blue);}
  .side-nav a:focus-visible{outline:2px solid var(--blue);outline-offset:2px;}
  .side-cta{
    background:var(--blue-deep);border-radius:var(--r16);padding:24px 20px;color:#fff;
    box-shadow:var(--shadow-card);
  }
  .side-cta h3{font-size:18px;color:#fff;}
  .side-cta p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.78);line-height:1.8;}
  .side-cta .btn{margin-top:18px;width:100%;}
  .tip-list li{
    display:flex;gap:10px;font-size:14px;color:var(--muted);line-height:1.7;
  }
  .tip-list li + li{margin-top:12px;}
  .tip-dot{
    flex:0 0 auto;width:18px;height:18px;border-radius:50%;
    border:1px solid var(--border-blue);color:var(--blue);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:11px;font-weight:700;margin-top:3px;
  }

  /* ============ 小卡矩阵 ============ */
  .matrix{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .matrix-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r16);
    padding:24px;box-shadow:var(--shadow-card);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .matrix-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--border-blue);}
  .matrix-icon{
    width:44px;height:44px;border-radius:var(--r12);
    background:var(--tint);display:flex;align-items:center;justify-content:center;
  }
  .matrix-icon svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
  .matrix-card h3{margin-top:16px;font-size:19px;color:var(--ink);}
  .matrix-card p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.8;}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:880px;}
  .faq-list{display:flex;flex-direction:column;gap:12px;}
  .faq-item{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r16);
    box-shadow:var(--shadow-card);overflow:hidden;
    transition:box-shadow .2s ease,border-color .2s ease;
  }
  .faq-item:hover{box-shadow:var(--shadow-hover);border-color:var(--border-blue);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:16px;padding:16px 24px;min-height:56px;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:focus-visible{outline:2px solid var(--blue);outline-offset:-2px;}
  .faq-q{font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;}
  .faq-icon{
    position:relative;width:20px;height:20px;flex:0 0 auto;
    transition:transform .22s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--blue);border-radius:2px;
  }
  .faq-icon::before{left:0;right:0;top:9px;height:2px;}
  .faq-icon::after{top:0;bottom:0;left:9px;width:2px;}
  .faq-item[open] .faq-icon{transform:rotate(45deg);}
  .faq-a{padding:0 24px 24px;color:var(--muted);font-size:15px;line-height:1.9;}
  .faq-a p + p{margin-top:12px;}

  /* ============ CTA 带 ============ */
  .cta-band{
    background:var(--tint);border-radius:var(--r24);
    padding:44px;display:flex;align-items:center;justify-content:space-between;
    gap:32px;flex-wrap:wrap;
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,30px);color:var(--ink);line-height:1.3;}
  .cta-band p{margin-top:10px;color:var(--muted);font-size:16px;max-width:560px;}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:96px;background:var(--blue-deep);color:#fff;
    border-radius:var(--r24) var(--r24) 0 0;
    padding:56px 0 24px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;
  }
  .site-footer .brand-text{color:#fff;}
  .site-footer .brand-mark{background:#fff;}
  .site-footer .brand-mark::after{background:var(--blue-deep);}
  .footer-desc{margin-top:14px;font-size:14px;color:rgba(255,255,255,.76);line-height:1.8;max-width:260px;}
  .domain-chip{
    display:inline-block;margin-top:14px;padding:5px 12px;border-radius:var(--rpill);
    font-size:12.5px;color:rgba(255,255,255,.86);
    border:1px solid rgba(255,255,255,.24);letter-spacing:.02em;
  }
  .footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600;}
  .footer-col li{font-size:14px;color:rgba(255,255,255,.74);line-height:1.9;}
  .footer-col li + li{margin-top:6px;}
  .footer-col a{color:rgba(255,255,255,.74);}
  .footer-col a:hover{color:#B3CFE3;text-decoration:underline;}
  .footer-col a:focus-visible{outline:2px solid #B3CFE3;outline-offset:2px;border-radius:4px;}
  .footer-bottom{
    margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.62);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1024px){
    .split{grid-template-columns:1fr;gap:32px;}
    .side{position:static;}
    .hero-head-grid{grid-template-columns:1fr;gap:24px;align-items:start;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
    .section{padding:72px 0;}
  }
  @media (max-width:860px){
    .nav-menu{
      display:none;
    }
    .nav-menu.is-open{
      display:flex;flex-direction:column;align-items:stretch;gap:2px;
      position:absolute;left:12px;right:12px;top:calc(100% + 10px);
      background:#fff;border:1px solid var(--line);border-radius:var(--r20);
      box-shadow:var(--shadow-hover);padding:12px;margin:0;
    }
    .nav-menu.is-open > li > a:not(.btn){
      display:flex;align-items:center;min-height:48px;padding:0 14px;font-size:15.5px;
    }
    .nav-menu.is-open > li > a:not(.btn)::after{display:none;}
    .nav-menu.is-open > li > a[aria-current="page"]{background:var(--tint);}
    .nav-cta{display:none;}
    .nav-menu.is-open .nav-cta-item{display:block;margin-top:8px;}
    .nav-menu.is-open .nav-cta-item .btn{width:100%;}
    .nav-toggle{display:inline-flex;margin-left:auto;}
    .brand-text{font-size:16px;}
  }
  @media (max-width:768px){
    .page-body .container{padding-left:20px;padding-right:20px;}
    .page-hero{padding:104px 0 44px;}
    .section{padding:56px 0;}
    .matrix{grid-template-columns:1fr;}
    .cta-band{padding:28px;flex-direction:column;align-items:flex-start;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1 1 auto;}
    .timeline{padding-left:52px;}
    .step-num{left:-52px;width:36px;height:36px;border-radius:10px;font-size:14px;}
    .timeline::before{left:17px;}
    .footer-grid{grid-template-columns:1fr;gap:24px;}
    .footer-bottom{justify-content:flex-start;}
  }
  @media (max-width:520px){
    .page-hero h1{font-size:26px;}
    .hero-sub{font-size:15.5px;}
    .step-card{padding:20px;}
    .faq-item summary{padding:14px 18px;}
    .faq-a{padding:0 18px 20px;}
    .site-footer{margin-top:64px;padding-top:40px;}
  }

/* roulang page: category2 */
:root{
  --blue:#17557A;
  --blue-deep:#103F5C;
  --blue-soft:#EEF5FA;
  --blue-line:#B3CFE3;
  --amber:#E39A2E;
  --amber-deep:#C9861F;
  --paper:#F5F8FA;
  --card:#FFFFFF;
  --ink:#0F1B24;
  --ink-2:#54687A;
  --ink-3:#8A9AA8;
  --line:#E3EAF0;
  --line-2:#EDF2F6;
  --ok:#2F9E7A;
  --warn:#C4553D;
  --radius-12:12px;
  --radius-16:16px;
  --radius-20:20px;
  --radius-24:24px;
  --radius-pill:999px;
  --shadow-card:0 4px 18px rgba(16,63,92,.08);
  --shadow-hover:0 14px 34px rgba(16,63,92,.14);
  --shadow-nav:0 8px 28px rgba(16,63,92,.10);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
::selection{background:rgba(23,85,122,.16)}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:16px;left:0;right:0;
  z-index:80;
  padding:0 20px;
  transition:top .25s ease;
}
.site-header.is-scrolled{top:10px}
.nav-shell{
  position:relative;
  max-width:1140px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 20px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  box-shadow:var(--shadow-nav);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.96);
  box-shadow:0 12px 34px rgba(16,63,92,.16);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--blue);
  white-space:nowrap;
  letter-spacing:-.01em;
}
.brand-mark{
  width:24px;height:24px;
  border-radius:7px;
  background:var(--blue);
  position:relative;
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  right:5px;top:5px;
  width:8px;height:8px;
  background:#fff;
  border-radius:2px;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-menu > li > a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--ink-2);
  border-radius:var(--radius-pill);
  transition:color .18s ease;
}
.nav-menu > li > a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--blue);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
}
.nav-menu > li > a:hover{color:var(--blue)}
.nav-menu > li > a:hover::after{transform:scaleX(1)}
.nav-menu > li > a[aria-current="page"]{color:var(--blue);font-weight:600}
.nav-menu > li > a[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta-item{display:none}
.nav-cta{flex:0 0 auto}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--blue);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 28px;
  border-radius:var(--radius-pill);
  font-size:15.5px;
  font-weight:600;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:var(--amber);
  color:#1A1206;
  box-shadow:0 6px 16px rgba(227,154,46,.28);
}
.btn-primary:hover{background:var(--amber-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(26,18,6,.22)}
.btn-ghost{
  background:#fff;
  color:var(--blue);
  border:1px solid var(--blue-line);
  border-radius:var(--radius-12);
  min-height:48px;
}
.btn-ghost:hover{background:var(--blue-soft);border-color:var(--blue)}
.btn-ghost:active{transform:translateY(1px)}
.btn-on-dark{
  background:transparent;
  color:#fff;
  border:1px solid rgba(255,255,255,.42);
  border-radius:var(--radius-12);
}
.btn-on-dark:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-line{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--blue);
  font-weight:600;
  font-size:15px;
}
.btn-line .arrow{transition:transform .18s ease}
.btn-line:hover .arrow{transform:translateX(3px)}

/* ---------- 面包屑与页头 ---------- */
.crumbs{
  font-size:14px;
  color:var(--ink-2);
  margin-bottom:14px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
}
.crumbs a{color:var(--ink-2);transition:color .18s ease}
.crumbs a:hover{color:var(--blue)}
.crumbs .sep{color:var(--ink-3)}
.crumbs .current{color:var(--ink)}

.page-hero{padding:132px 0 12px}
.hero-grid{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:52px;
  align-items:center;
}
.hero-copy h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.15;
  margin-bottom:18px;
  color:var(--ink);
}
.hero-copy h1 .kw{
  display:block;
  color:var(--blue);
}
.hero-sub{
  font-size:17px;
  color:var(--ink-2);
  max-width:560px;
}
.hero-badges{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 14px;
  font-size:13px;
  font-weight:500;
  color:var(--blue);
  background:var(--blue-soft);
  border:1px solid #DCEBF5;
  border-radius:var(--radius-pill);
  white-space:nowrap;
}
.badge .dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--blue);
  flex:0 0 auto;
}
.hero-media{
  position:relative;
  border-radius:var(--radius-16);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  border:1px solid var(--line);
  background:#fff;
}
.hero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.hero-media .media-tag{
  position:absolute;
  left:16px;bottom:16px;
  padding:8px 14px;
  font-size:13px;
  font-weight:600;
  color:var(--blue-deep);
  background:rgba(255,255,255,.92);
  border-radius:var(--radius-pill);
  box-shadow:var(--shadow-card);
}

/* ---------- 分组手风琴区 ---------- */
.section{padding:64px 0}
.faq-wrap{
  max-width:880px;
  margin:0 auto;
}
.faq-group + .faq-group{margin-top:72px}
.group-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:22px;
}
.group-num{
  font-size:28px;
  font-weight:700;
  color:var(--blue-line);
  font-variant-numeric:tabular-nums;
  line-height:1;
  flex:0 0 auto;
}
.group-head h2{
  font-size:clamp(22px,2.6vw,30px);
  color:var(--ink);
}
.group-desc{
  margin:-10px 0 22px 44px;
  font-size:15px;
  color:var(--ink-2);
}
.acc-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-16);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.acc-item + .acc-item{margin-top:12px}
.acc-item:hover{
  box-shadow:var(--shadow-hover);
  border-color:#D6E5EF;
}
.acc-item.is-open{border-color:#CFE3F0}
.acc-btn{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:16px 24px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink);
  border-radius:var(--radius-16);
}
.acc-btn:hover{color:var(--blue)}
.acc-ico{
  position:relative;
  width:20px;height:20px;
  flex:0 0 auto;
  transition:transform .28s ease;
}
.acc-ico::before,
.acc-ico::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--blue);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.acc-ico::before{width:14px;height:2px}
.acc-ico::after{width:2px;height:14px}
.acc-item.is-open .acc-ico{transform:rotate(45deg)}
.acc-panel{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.acc-item.is-open .acc-panel{max-height:600px}
.acc-panel p{
  padding:0 24px 24px;
  font-size:15px;
  line-height:1.9;
  color:var(--ink-2);
}

/* ---------- 深色提示条 ---------- */
.notice-bar{
  display:flex;
  align-items:center;
  gap:20px;
  margin:56px 0;
  padding:24px 28px;
  background:var(--blue-deep);
  border-radius:var(--radius-16);
  color:#fff;
  box-shadow:0 16px 40px rgba(16,63,92,.22);
}
.notice-ico{
  flex:0 0 auto;
  width:40px;height:40px;
  border-radius:12px;
  background:rgba(227,154,46,.22);
  border:1px solid rgba(227,154,46,.5);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:19px;
  color:var(--amber);
}
.notice-text{flex:1 1 auto}
.notice-text strong{
  display:block;
  font-size:16px;
  font-weight:600;
  margin-bottom:4px;
  color:#fff;
}
.notice-text span{
  display:block;
  font-size:14.5px;
  line-height:1.8;
  color:rgba(255,255,255,.78);
}
.notice-bar .btn{flex:0 0 auto}

/* ---------- 快速链接卡 ---------- */
.quick-wrap{max-width:880px;margin:0 auto}
.quick-title{
  font-size:clamp(22px,2.6vw,28px);
  margin-bottom:10px;
}
.quick-sub{
  font-size:15px;
  color:var(--ink-2);
  margin-bottom:24px;
}
.quick-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.quick-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:20px 22px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-16);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.quick-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
  border-color:#D6E5EF;
}
.quick-card .qc-label{
  font-size:15px;
  font-weight:600;
  color:var(--ink);
}
.quick-card .qc-meta{
  display:block;
  font-size:13px;
  color:var(--ink-3);
  margin-top:2px;
}
.quick-card .qc-arrow{
  color:var(--blue);
  font-weight:700;
  transition:transform .18s ease;
}
.quick-card:hover .qc-arrow{transform:translateX(3px)}

/* ---------- CTA 与表单 ---------- */
.cta-band{
  background:var(--blue-soft);
  border:1px solid #DCEBF5;
  border-radius:var(--radius-24);
  padding:44px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
  align-items:start;
}
.cta-copy h2{
  font-size:clamp(24px,3vw,34px);
  margin-bottom:14px;
}
.cta-copy p{
  color:var(--ink-2);
  font-size:16px;
  max-width:460px;
}
.cta-points{
  margin-top:24px;
  display:grid;
  gap:10px;
}
.cta-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14.5px;
  color:var(--ink-2);
}
.cta-points .tick{
  flex:0 0 auto;
  width:18px;height:18px;
  margin-top:3px;
  border-radius:50%;
  background:var(--blue);
  color:#fff;
  font-size:11px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-20);
  box-shadow:var(--shadow-card);
  padding:28px;
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1 / -1}
.field label{
  font-size:14px;
  color:var(--ink-2);
  font-weight:500;
}
.field input,
.field select,
.field textarea{
  width:100%;
  min-height:48px;
  padding:11px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-12);
  background:#fff;
  font-size:15px;
  color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field input::placeholder,
.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--blue);
  box-shadow:0 0 0 3px rgba(23,85,122,.12);
}
.check-row{
  grid-column:1 / -1;
  display:flex;
  align-items:flex-start;
  gap:9px;
  font-size:13.5px;
  color:var(--ink-2);
  margin-top:2px;
}
.check-row input{
  width:16px;height:16px;
  margin-top:4px;
  accent-color:var(--blue);
  flex:0 0 auto;
}
.form-actions{grid-column:1 / -1;display:flex;flex-direction:column;gap:10px}
.form-actions .btn{width:100%}
.form-hint{font-size:13px;color:var(--ink-3)}
.form-msg{
  grid-column:1 / -1;
  font-size:14px;
  color:var(--ok);
  background:#F0FAF6;
  border:1px solid #CBEDDF;
  border-radius:var(--radius-12);
  padding:10px 14px;
  display:none;
}
.form-msg.is-show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:80px;
  background:var(--blue-deep);
  color:#fff;
  border-radius:var(--radius-24) var(--radius-24) 0 0;
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
}
.site-footer .brand{color:#fff;font-size:17px}
.site-footer .brand-mark{background:#fff}
.site-footer .brand-mark::after{background:var(--blue-deep)}
.footer-desc{
  margin:14px 0 16px;
  font-size:14px;
  color:rgba(255,255,255,.72);
  line-height:1.8;
  max-width:280px;
}
.domain-chip{
  display:inline-block;
  padding:5px 12px;
  font-size:13px;
  letter-spacing:.02em;
  color:#B3CFE3;
  border:1px solid rgba(179,207,227,.36);
  border-radius:var(--radius-pill);
  font-variant-numeric:tabular-nums;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:10px}
.footer-col li{
  font-size:14px;
  color:rgba(255,255,255,.72);
  line-height:1.7;
}
.footer-col a{color:rgba(255,255,255,.72);transition:color .18s ease}
.footer-col a:hover{color:#B3CFE3;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13.5px;
  color:rgba(255,255,255,.56);
  font-variant-numeric:tabular-nums;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-grid{gap:36px}
  .quick-grid{grid-template-columns:1fr 1fr}
  .cta-band{grid-template-columns:1fr;gap:28px;padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-menu{
    position:absolute;
    top:calc(100% + 10px);
    left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin-left:0;
    padding:12px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-20);
    box-shadow:var(--shadow-hover);
  }
  .nav-menu.is-open{display:flex}
  .nav-menu > li > a{
    display:block;
    min-height:48px;
    padding:12px 16px;
    font-size:16px;
    border-radius:var(--radius-12);
  }
  .nav-menu > li > a::after{display:none}
  .nav-menu > li > a:hover,
  .nav-menu > li > a[aria-current="page"]{background:var(--blue-soft)}
  .nav-cta-item{display:block;margin-top:6px}
  .nav-cta-item .btn{width:100%}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-media{order:2}
  .page-hero{padding-top:120px}
  .notice-bar{flex-wrap:wrap}
  .notice-bar .btn{width:100%}
}
@media (max-width:768px){
  .container{padding:0 24px}
  .section{padding:52px 0}
  .faq-group + .faq-group{margin-top:56px}
  .quick-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:560px){
  .container{padding:0 20px}
  .site-header{padding:0 12px;top:12px}
  .nav-shell{padding:8px 8px 8px 14px;gap:10px}
  .brand{font-size:15.5px}
  .brand-text{max-width:190px;overflow:hidden;text-overflow:ellipsis}
  .page-hero{padding-top:112px}
  .hero-copy h1{font-size:30px}
  .hero-sub{font-size:16px}
  .acc-btn{padding:14px 18px;font-size:15.5px}
  .acc-panel p{padding:0 18px 20px;font-size:14.5px}
  .cta-band{padding:26px;border-radius:var(--radius-20)}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr}
  .notice-bar{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}