/* roulang page: index */
:root{
      --bg:#f7fafd;
      --bg-soft:#eef5fc;
      --surface:#ffffff;
      --surface-strong:#fbfdff;
      --line:#dde7f0;
      --line-strong:#cfe0f2;
      --text:#1f2d3d;
      --muted:#5f7184;
      --soft:#7e8fa1;
      --primary:#3e7cbf;
      --primary-strong:#2f6aa8;
      --primary-soft:rgba(62,124,191,.08);
      --accent:#e98f72;
      --accent-soft:rgba(233,143,114,.12);
      --shadow:0 18px 50px rgba(31,45,61,.08);
      --shadow-hover:0 22px 58px rgba(31,45,61,.14);
      --radius-xl:28px;
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --side:112px;
      --container:1320px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(62,124,191,.08), transparent 26%),
        radial-gradient(circle at 90% 10%, rgba(233,143,114,.08), transparent 22%),
        linear-gradient(180deg, #fbfdff 0%, #f7fafd 100%);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      line-height:1.75;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.38;
      background-image:
        linear-gradient(rgba(221,231,240,.24) 1px, transparent 1px),
        linear-gradient(90deg, rgba(221,231,240,.24) 1px, transparent 1px);
      background-size:34px 34px;
      mask-image:linear-gradient(180deg, rgba(0,0,0,.55), transparent 88%);
    }
    a{
      color:inherit;
      text-decoration:none;
      transition:color .2s ease, transform .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    img{max-width:100%; display:block}
    button, input, textarea, select{
      font:inherit;
      color:inherit;
    }
    button{cursor:pointer}
    ::selection{background:rgba(62,124,191,.18); color:var(--text)}
    :focus-visible{
      outline:3px solid rgba(62,124,191,.22);
      outline-offset:3px;
    }

    .site-shell{
      min-height:100vh;
      position:relative;
    }
    .side-rail{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--side);
      padding:18px 14px 16px;
      background:rgba(234,242,250,.92);
      border-right:1px solid rgba(221,231,240,.9);
      backdrop-filter:saturate(140%) blur(10px);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      z-index:30;
    }
    .rail-top{
      display:flex;
      flex-direction:column;
      gap:18px;
    }
    .brand{
      display:flex;
      flex-direction:column;
      align-items:flex-start;
      gap:12px;
    }
    .brand-mark{
      width:54px;
      height:54px;
      border-radius:18px;
      background:linear-gradient(135deg, #3e7cbf 0%, #76a9e0 100%);
      box-shadow:0 14px 28px rgba(62,124,191,.22);
      position:relative;
      overflow:hidden;
      display:block;
    }
    .brand-mark span{
      position:absolute;
      border-radius:999px;
      background:rgba(255,255,255,.95);
    }
    .brand-mark .p1{width:8px;height:8px;left:14px;top:17px}
    .brand-mark .p2{width:8px;height:8px;left:27px;top:10px;opacity:.9}
    .brand-mark .p3{width:8px;height:8px;left:36px;top:28px;opacity:.82}
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:12px;
      border-radius:14px;
      border:1px solid rgba(255,255,255,.5);
      transform:rotate(6deg);
    }
    .brand-text strong{
      display:block;
      font-size:16px;
      line-height:1.2;
      letter-spacing:-.02em;
      color:var(--text);
    }
    .brand-text small{
      display:block;
      margin-top:4px;
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
    }
    .rail-nav{
      display:flex;
      flex-direction:column;
      gap:10px;
      padding-top:2px;
    }
    .nav-link{
      min-height:40px;
      padding:10px 12px;
      border-radius:16px;
      border:1px solid transparent;
      color:var(--muted);
      font-size:13px;
      line-height:1;
      text-align:center;
      background:transparent;
      display:inline-flex;
      align-items:center;
      justify-content:center;
    }
    .nav-link:hover{
      background:rgba(62,124,191,.08);
      color:var(--primary-strong);
      transform:translateY(-1px);
    }
    .nav-link.active{
      color:var(--primary-strong);
      background:rgba(255,255,255,.92);
      border-color:#cfe0f2;
      box-shadow:0 10px 26px rgba(31,45,61,.08);
    }
    .rail-foot{
      display:flex;
      flex-direction:column;
      gap:10px;
      align-items:flex-start;
      padding-top:16px;
      border-top:1px solid rgba(221,231,240,.95);
    }
    .age-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:6px 10px;
      border-radius:999px;
      background:var(--accent-soft);
      color:#b96449;
      font-size:12px;
      font-weight:700;
      letter-spacing:.06em;
    }
    .rail-foot small{
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
    }

    .page-content{
      margin-left:var(--side);
      min-height:100vh;
      position:relative;
    }
    .container{
      width:min(var(--container), calc(100% - 32px));
      margin:0 auto;
    }
    .main{
      padding:24px 0 0;
    }
    section{
      scroll-margin-top:92px;
    }
    .section{
      margin-top:88px;
    }
    .hero{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:40px;
      align-items:stretch;
      padding:34px;
      border-radius:var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255,255,255,.96), rgba(245,250,255,.96)),
        linear-gradient(180deg, #ffffff, #f7fafd);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero::before{
      content:"";
      position:absolute;
      inset:auto -140px -160px auto;
      width:360px;
      height:360px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.12), transparent 68%);
      pointer-events:none;
    }
    .hero-copy{
      position:relative;
      display:flex;
      flex-direction:column;
      justify-content:center;
      gap:18px;
      min-height:100%;
    }
    .kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      width:fit-content;
      padding:8px 14px;
      border-radius:999px;
      background:rgba(62,124,191,.08);
      color:var(--primary-strong);
      border:1px solid rgba(62,124,191,.12);
      font-size:13px;
      font-weight:700;
      letter-spacing:.02em;
    }
    .kicker::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:999px;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(233,143,114,.16);
      flex:0 0 auto;
    }
    .hero h1{
      margin:0;
      font-size:clamp(32px, 4.3vw, 56px);
      line-height:1.12;
      letter-spacing:-.04em;
      max-width:12ch;
    }
    .hero p{
      margin:0;
      color:var(--muted);
      font-size:17px;
      line-height:1.85;
      max-width:56ch;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:4px;
    }
    .btn{
      min-height:48px;
      padding:0 20px;
      border-radius:999px;
      border:1px solid transparent;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      font-weight:700;
      font-size:15px;
      white-space:nowrap;
      box-shadow:none;
    }
    .btn::after{
      content:"→";
      font-size:16px;
      transform:translateX(0);
      transition:transform .2s ease;
    }
    .btn:hover::after{transform:translateX(3px)}
    .btn-primary{
      background:var(--primary);
      color:#fff;
      box-shadow:0 14px 28px rgba(62,124,191,.18);
    }
    .btn-primary:hover{
      background:var(--primary-strong);
      transform:translateY(-2px);
      box-shadow:0 18px 32px rgba(62,124,191,.22);
    }
    .btn-secondary{
      background:#fff;
      color:var(--primary-strong);
      border-color:var(--line-strong);
    }
    .btn-secondary:hover{
      background:#f3f8fd;
      border-color:rgba(62,124,191,.32);
      transform:translateY(-2px);
      box-shadow:0 12px 24px rgba(31,45,61,.08);
    }
    .hero-note{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:2px;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      padding:7px 10px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:13px;
      line-height:1;
    }

    .hero-visual{
      display:grid;
      grid-template-rows:auto auto;
      gap:16px;
      align-content:stretch;
    }
    .preview-card,
    .mini-card,
    .info-card,
    .feature-main,
    .small-card,
    .news-panel,
    .compare-card,
    .cta,
    .footer-panel{
      border:1px solid var(--line);
      background:var(--surface);
      box-shadow:var(--shadow);
    }
    .preview-card{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-xl);
      padding:22px;
      min-height:100%;
    }
    .preview-card::before{
      content:"";
      position:absolute;
      inset:auto -16% -24% auto;
      width:210px;
      height:210px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.16), transparent 62%);
      pointer-events:none;
    }
    .preview-art{
      position:relative;
      height:170px;
      border-radius:20px;
      margin-bottom:18px;
      background:
        linear-gradient(135deg, rgba(62,124,191,.08), rgba(255,255,255,.96) 54%, rgba(233,143,114,.08)),
        linear-gradient(180deg, #edf4fb, #ffffff);
      border:1px solid #d8e4ee;
      overflow:hidden;
    }
    .preview-art::before{
      content:"";
      position:absolute;
      inset:18px;
      border-radius:16px;
      border:1px dashed rgba(62,124,191,.22);
    }
    .preview-art::after{
      content:"";
      position:absolute;
      inset:34px auto auto 18px;
      width:72%;
      height:1px;
      background:linear-gradient(90deg, rgba(62,124,191,.56), rgba(62,124,191,0));
      box-shadow:0 34px 0 rgba(62,124,191,.38), 0 68px 0 rgba(62,124,191,.22);
      transform:skewX(-18deg);
      opacity:.8;
    }
    .preview-meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      margin-bottom:12px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      background:var(--accent-soft);
      color:#b96449;
      font-size:12px;
      font-weight:700;
      line-height:1;
    }
    .meta-inline{
      color:var(--soft);
      font-size:12px;
      line-height:1.4;
      display:inline-flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
    }
    .meta-inline span{
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .meta-inline span + span::before{
      content:"";
      width:4px;
      height:4px;
      border-radius:50%;
      background:#c2cfdb;
    }
    .preview-title{
      margin:0 0 8px;
      font-size:20px;
      line-height:1.35;
      letter-spacing:-.02em;
    }
    .preview-text{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .preview-mini{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
    }
    .mini-card{
      border-radius:22px;
      padding:18px;
      position:relative;
      overflow:hidden;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .mini-card::before{
      content:"";
      position:absolute;
      inset:auto -12px -14px auto;
      width:88px;
      height:88px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.12), transparent 66%);
    }
    .mini-card h3{
      margin:0 0 10px;
      font-size:15px;
      line-height:1.4;
    }
    .mini-stat{
      font-size:30px;
      line-height:1;
      font-weight:800;
      letter-spacing:-.03em;
      color:var(--primary-strong);
      margin-bottom:6px;
    }
    .mini-card p{
      margin:0;
      font-size:13px;
      line-height:1.75;
      color:var(--muted);
    }
    .mini-card.accent{
      background:linear-gradient(180deg, rgba(62,124,191,.07), rgba(255,255,255,.96));
      border-color:#d5e4f4;
    }

    .trust-strip{
      display:grid;
      grid-template-columns:repeat(3, 1fr);
      gap:16px;
    }
    .info-card{
      border-radius:22px;
      padding:20px;
      display:flex;
      gap:14px;
      align-items:flex-start;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .icon-dot{
      width:42px;
      height:42px;
      border-radius:14px;
      background:linear-gradient(135deg, rgba(62,124,191,.12), rgba(62,124,191,.04));
      border:1px solid rgba(62,124,191,.12);
      display:grid;
      place-items:center;
      flex:0 0 auto;
      position:relative;
    }
    .icon-dot::before{
      content:"";
      width:11px;
      height:11px;
      border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 0 5px rgba(62,124,191,.14);
    }
    .info-card h3{
      margin:0 0 4px;
      font-size:16px;
      line-height:1.35;
    }
    .info-card p{
      margin:0;
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }

    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:24px;
    }
    .section-head h2{
      margin:0;
      font-size:clamp(26px, 3vw, 40px);
      line-height:1.14;
      letter-spacing:-.03em;
    }
    .section-head p{
      margin:8px 0 0;
      color:var(--muted);
      font-size:15px;
      line-height:1.8;
      max-width:58ch;
    }

    .feature-grid{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:18px;
      align-items:stretch;
    }
    .feature-main{
      border-radius:28px;
      padding:28px;
      background:
        linear-gradient(180deg, rgba(62,124,191,.06), rgba(255,255,255,.96)),
        #fff;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      overflow:hidden;
      position:relative;
      min-height:100%;
    }
    .feature-main::after{
      content:"";
      position:absolute;
      inset:auto -120px -120px auto;
      width:280px;
      height:280px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(233,143,114,.11), transparent 66%);
      pointer-events:none;
    }
    .feature-main .tag,
    .small-card .tag,
    .waterfall-body .tag,
    .news-feature .tag{
      display:inline-flex;
      align-items:center;
      width:fit-content;
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(62,124,191,.14);
      background:rgba(62,124,191,.07);
      color:var(--primary-strong);
      font-size:12px;
      font-weight:700;
      line-height:1;
    }
    .feature-main h3,
    .small-card h3{
      margin:12px 0 10px;
      font-size:20px;
      line-height:1.35;
      letter-spacing:-.02em;
    }
    .feature-main p,
    .small-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .feature-list{
      margin:20px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .feature-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
      color:var(--text);
      font-size:14px;
      line-height:1.75;
    }
    .feature-list li span{
      width:18px;
      height:18px;
      border-radius:50%;
      background:rgba(62,124,191,.1);
      color:var(--primary-strong);
      display:inline-grid;
      place-items:center;
      flex:0 0 auto;
      margin-top:3px;
      font-size:12px;
      font-weight:700;
    }
    .grid-cards{
      display:grid;
      grid-template-columns:repeat(2, 1fr);
      gap:18px;
    }
    .small-card{
      border-radius:22px;
      padding:20px;
      background:linear-gradient(180deg, #fff, #fbfdff);
      position:relative;
      overflow:hidden;
      min-height:100%;
    }
    .small-card::before{
      content:"";
      position:absolute;
      inset:auto -8px -10px auto;
      width:96px;
      height:96px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.08), transparent 68%);
    }
    .small-card.focus{
      grid-column:1 / -1;
      min-height:210px;
      background:linear-gradient(135deg, rgba(62,124,191,.08), rgba(255,255,255,.98));
      border-color:#d3e2f3;
    }
    .small-card .index{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:30px;
      height:30px;
      border-radius:10px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--primary-strong);
      font-weight:800;
      font-size:13px;
    }

    .news-panel{
      border-radius:28px;
      padding:30px;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .news-layout{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:20px;
    }
    .news-feature{
      border-radius:24px;
      padding:24px;
      background:
        linear-gradient(180deg, rgba(62,124,191,.06), rgba(255,255,255,.96));
      border:1px solid #d7e5f3;
      display:flex;
      flex-direction:column;
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .news-feature::before{
      content:"";
      position:absolute;
      inset:auto -18% -24% auto;
      width:220px;
      height:220px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.12), transparent 64%);
      pointer-events:none;
    }
    .news-feature h3{
      margin:14px 0 12px;
      font-size:24px;
      line-height:1.35;
      letter-spacing:-.03em;
      max-width:20ch;
    }
    .news-feature p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
      max-width:58ch;
    }
    .news-feature .meta-inline{
      margin-top:auto;
      padding-top:18px;
    }
    .news-list{
      display:grid;
      gap:12px;
    }
    .news-item{
      display:block;
      padding:18px;
      background:var(--bg);
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:0 10px 24px rgba(31,45,61,.04);
    }
    .news-item:hover{
      transform:translateY(-3px);
      border-color:#cfe0f2;
      box-shadow:0 16px 30px rgba(31,45,61,.09);
    }
    .news-item h3{
      margin:10px 0 8px;
      font-size:18px;
      line-height:1.4;
      letter-spacing:-.02em;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .news-item p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
      display:-webkit-box;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }

    .empty-state{
      padding:34px 24px;
      text-align:center;
      border-radius:24px;
      background:
        linear-gradient(180deg, rgba(62,124,191,.05), rgba(255,255,255,.96)),
        #fff;
      border:1px dashed #c8d8e8;
    }
    .empty-icon{
      width:64px;
      height:64px;
      margin:0 auto 14px;
      border-radius:20px;
      background:linear-gradient(135deg, rgba(62,124,191,.11), rgba(233,143,114,.08));
      border:1px solid rgba(62,124,191,.12);
      display:grid;
      place-items:center;
      position:relative;
    }
    .empty-icon::before,
    .empty-icon::after{
      content:"";
      position:absolute;
      border-radius:999px;
      background:rgba(62,124,191,.5);
    }
    .empty-icon::before{
      width:28px;
      height:2px;
      top:24px;
    }
    .empty-icon::after{
      width:2px;
      height:28px;
      left:31px;
      top:17px;
    }
    .empty-state h3{
      margin:0 0 8px;
      font-size:20px;
      line-height:1.35;
    }
    .empty-state p{
      margin:0 auto 18px;
      max-width:560px;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .empty-actions{
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:12px;
    }

    .waterfall{
      display:grid;
      grid-template-columns:repeat(4, 1fr);
      gap:18px;
      align-items:start;
    }
    .waterfall-card{
      border-radius:24px;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      display:flex;
      flex-direction:column;
      min-height:100%;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .waterfall-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-hover);
      border-color:#cfe0f2;
    }
    .waterfall-card:nth-child(2n){
      transform:translateY(14px);
    }
    .waterfall-card:nth-child(2n):hover{
      transform:translateY(10px);
    }
    .cover{
      min-height:170px;
      position:relative;
      overflow:hidden;
      background:
        linear-gradient(135deg, rgba(62,124,191,.14), rgba(255,255,255,.96) 58%, rgba(233,143,114,.1)),
        linear-gradient(180deg, #edf4fb, #ffffff);
      border-bottom:1px solid var(--line);
    }
    .cover::before{
      content:"";
      position:absolute;
      inset:18px;
      border-radius:18px;
      border:1px dashed rgba(62,124,191,.18);
    }
    .cover::after{
      content:"";
      position:absolute;
      inset:auto 18px 18px auto;
      width:72px;
      height:72px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(62,124,191,.14), transparent 64%);
    }
    .waterfall-body{
      padding:20px;
      display:flex;
      flex-direction:column;
      gap:12px;
      flex:1 1 auto;
    }
    .waterfall-body h3{
      margin:0;
      font-size:19px;
      line-height:1.4;
      letter-spacing:-.02em;
    }
    .waterfall-body p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }

    .compare{
      display:grid;
      grid-template-columns:repeat(2, 1fr);
      gap:18px;
    }
    .compare-card{
      border-radius:28px;
      padding:26px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }
    .compare-card.alt{
      background:linear-gradient(180deg, rgba(62,124,191,.06), rgba(255,255,255,.98));
      border-color:#d5e3f1;
    }
    .compare-card h3{
      margin:0;
      font-size:22px;
      line-height:1.3;
      letter-spacing:-.02em;
    }
    .compare-sub{
      margin:8px 0 0;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
    }
    .compare-list{
      list-style:none;
      padding:0;
      margin:20px 0 0;
      display:grid;
      gap:12px;
    }
    .compare-list li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      color:var(--muted);
      line-height:1.75;
      font-size:14px;
    }
    .mark{
      width:24px;
      height:24px;
      border-radius:8px;
      flex:0 0 auto;
      display:grid;
      place-items:center;
      font-weight:800;
      font-size:13px;
      margin-top:1px;
    }
    .mark.ok{
      background:rgba(62,124,191,.1);
      color:var(--primary-strong);
    }
    .mark.warn{
      background:rgba(233,143,114,.14);
      color:#b96449;
    }
    .compare-list strong{
      display:block;
      color:var(--text);
      font-size:14px;
      margin-bottom:2px;
    }

    .faq-grid{
      display:grid;
      gap:14px;
    }
    details.faq{
      border-radius:20px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    details.faq[open]{
      border-color:#cfe0f2;
      box-shadow:var(--shadow-hover);
    }
    summary{
      list-style:none;
      cursor:pointer;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:18px 20px;
      font-size:17px;
      font-weight:700;
      line-height:1.45;
      color:var(--text);
    }
    summary::-webkit-details-marker{display:none}
    summary .sign{
      width:32px;
      height:32px;
      border-radius:999px;
      background:#f1f7fd;
      color:var(--primary);
      display:grid;
      place-items:center;
      flex:0 0 auto;
      font-size:18px;
      transition:transform .2s ease, background-color .2s ease, color .2s ease;
    }
    details[open] summary .sign{
      background:rgba(62,124,191,.1);
      color:var(--primary-strong);
      transform:rotate(45deg);
    }
    details.faq .faq-body{
      padding:0 20px 18px;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
    }

    .cta{
      border-radius:28px;
      padding:30px;
      background:
        linear-gradient(135deg, rgba(62,124,191,.06), rgba(255,255,255,.96) 58%, rgba(233,143,114,.06)),
        #fff;
      display:grid;
      grid-template-columns:1fr .95fr;
      gap:20px;
      align-items:start;
    }
    .cta h2{
      margin:0 0 10px;
      font-size:clamp(26px, 3vw, 38px);
      line-height:1.15;
      letter-spacing:-.03em;
    }
    .cta p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.85;
    }
    .cta-meta{
      margin-top:14px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .form{
      border-radius:24px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 14px 32px rgba(31,45,61,.08);
      padding:22px;
    }
    .form-grid{
      display:grid;
      grid-template-columns:repeat(2, 1fr);
      gap:14px;
    }
    .field{
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .label{
      color:var(--muted);
      font-size:13px;
      font-weight:700;
      line-height:1.4;
    }
    .input,
    .textarea{
      width:100%;
      border-radius:14px;
      border:1px solid var(--line);
      background:#fff;
      padding:13px 14px;
      color:var(--text);
      box-shadow:none;
      transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease, background-color .2s ease;
    }
    .input::placeholder,
    .textarea::placeholder{
      color:#99a8b7;
    }
    .input:focus,
    .textarea:focus{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(62,124,191,.12);
      outline:none;
    }
    .textarea{
      min-height:130px;
      resize:vertical;
    }
    .form-actions{
      margin-top:14px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
    }
    .form-note{
      color:var(--muted);
      font-size:12px;
      line-height:1.7;
    }

    .footer{
      margin-top:88px;
      padding:0 0 34px;
    }
    .footer-panel{
      border-radius:28px;
      padding:26px 28px;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .footer-top{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:18px;
      align-items:start;
    }
    .footer h3{
      margin:0 0 10px;
      font-size:16px;
      line-height:1.4;
    }
    .footer p,
    .footer li,
    .footer a{
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:8px;
    }
    .footer-links a:hover{
      color:var(--primary-strong);
    }
    .footer-bottom{
      margin-top:22px;
      padding-top:18px;
      border-top:1px solid var(--line);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }

    .richtext{
      font-size:16px;
      line-height:1.9;
      color:var(--text);
    }
    .richtext h2,
    .richtext h3{
      line-height:1.35;
      letter-spacing:-.02em;
      margin:1.4em 0 .7em;
    }
    .richtext p{margin:0 0 18px}
    .richtext ul,
    .richtext ol{
      margin:0 0 18px 1.2em;
      padding:0;
    }
    .richtext li{margin:0 0 8px}
    .richtext blockquote{
      margin:0 0 22px;
      padding:16px 18px;
      border-left:4px solid rgba(62,124,191,.36);
      background:rgba(62,124,191,.05);
      border-radius:0 16px 16px 0;
      color:var(--muted);
    }
    .richtext figure{
      margin:0 0 22px;
      padding:14px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      box-shadow:0 10px 24px rgba(31,45,61,.06);
    }
    .richtext img{
      border-radius:14px;
      height:auto;
    }
    .richtext table{
      width:100%;
      border-collapse:collapse;
      margin:0 0 22px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      overflow:hidden;
    }
    .richtext th,
    .richtext td{
      border-bottom:1px solid var(--line);
      padding:12px 14px;
      text-align:left;
      vertical-align:top;
    }
    .richtext th{
      background:#f5f9fd;
      font-weight:700;
    }
    .richtext code{
      padding:2px 6px;
      border-radius:8px;
      background:#f1f7fd;
      border:1px solid #dbe8f5;
      color:#355f8f;
    }
    .richtext hr{
      border:0;
      border-top:1px solid var(--line);
      margin:28px 0;
    }

    .hint-inline{
      display:inline-flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      font-size:13px;
      color:var(--muted);
    }
    .hint-dot{
      width:6px;
      height:6px;
      border-radius:50%;
      background:var(--primary);
      display:inline-block;
    }

    @media (max-width: 1180px){
      :root{--side:96px}
      .hero,
      .cta{
        gap:28px;
      }
      .waterfall{
        grid-template-columns:repeat(2, 1fr);
      }
    }

    @media (max-width: 991px){
      .hero,
      .news-layout,
      .feature-grid,
      .compare,
      .cta,
      .footer-top{
        grid-template-columns:1fr;
      }
      .trust-strip{
        grid-template-columns:1fr;
      }
      .grid-cards{
        grid-template-columns:1fr 1fr;
      }
      .waterfall{
        grid-template-columns:1fr 1fr;
      }
      .footer-top{
        gap:20px;
      }
      .hero h1{
        max-width:none;
      }
    }

    @media (max-width: 767px){
      body::before{
        background-size:28px 28px;
      }
      .side-rail{
        position:sticky;
        top:0;
        inset:auto;
        width:100%;
        min-height:auto;
        padding:14px 16px;
        border-right:0;
        border-bottom:1px solid rgba(221,231,240,.95);
        flex-direction:column;
        gap:12px;
      }
      .page-content{
        margin-left:0;
      }
      .rail-top{
        flex-direction:row;
        align-items:center;
        justify-content:space-between;
        gap:14px;
      }
      .brand{
        flex-direction:row;
        align-items:center;
        gap:12px;
      }
      .brand-text small{
        margin-top:2px;
      }
      .rail-nav{
        flex-direction:row;
        overflow-x:auto;
        -webkit-overflow-scrolling:touch;
        padding-bottom:2px;
        gap:8px;
      }
      .rail-nav::-webkit-scrollbar{
        display:none;
      }
      .nav-link{
        flex:0 0 auto;
        min-height:38px;
        padding:10px 14px;
      }
      .rail-foot{
        display:none;
      }
      .container{
        width:min(100% - 24px, var(--container));
      }
      .main{
        padding-top:12px;
      }
      .hero{
        padding:24px 20px;
      }
      .hero h1{
        font-size:clamp(30px, 8vw, 40px);
      }
      .hero p{
        font-size:15px;
      }
      .section{
        margin-top:64px;
      }
      .news-panel,
      .footer-panel,
      .cta{
        padding:22px 18px;
      }
      .preview-mini,
      .grid-cards,
      .form-grid{
        grid-template-columns:1fr;
      }
      .small-card.focus{
        grid-column:auto;
        min-height:auto;
      }
      .waterfall{
        grid-template-columns:1fr;
      }
      .waterfall-card:nth-child(2n){
        transform:none;
      }
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .section-head p{
        max-width:none;
      }
      .form-actions{
        flex-direction:column;
        align-items:stretch;
      }
      .btn{
        width:100%;
      }
      .footer-bottom{
        flex-direction:column;
        align-items:flex-start;
      }
    }

    @media (max-width: 479px){
      .hero{
        padding:20px 16px;
      }
      .hero h1{
        font-size:30px;
      }
      .preview-card,
      .mini-card,
      .info-card,
      .feature-main,
      .small-card,
      .news-panel,
      .compare-card,
      .cta,
      .footer-panel{
        border-radius:22px;
      }
      .news-feature h3{
        font-size:22px;
      }
      summary{
        font-size:16px;
        padding:16px 16px;
      }
      .details.faq .faq-body{
        padding:0 16px 16px;
      }
      .news-item h3{
        font-size:17px;
      }
      .compare-card{
        padding:22px 18px;
      }
      .form{
        padding:18px 16px;
      }
    }

/* roulang page: article */
:root{
      --color-primary:#3E7CBF;
      --color-primary-dark:#2F6AA8;
      --color-primary-soft:#EAF2FA;
      --color-accent:#E98F72;
      --color-text:#1F2D3D;
      --color-muted:#64748B;
      --color-light:#F7FAFD;
      --color-white:#FFFFFF;
      --color-border:#DDE7F0;
      --color-border-strong:#CFE0F2;
      --shadow-soft:0 18px 50px rgba(31,45,61,.08);
      --shadow-card:0 14px 34px rgba(31,45,61,.10);
      --shadow-hover:0 22px 55px rgba(31,45,61,.14);
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --rail-width:108px;
      --container:1180px;
      --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    }

    *{
      box-sizing:border-box;
      margin:0;
      padding:0;
    }

    html{
      scroll-behavior:smooth;
      text-size-adjust:100%;
      -webkit-text-size-adjust:100%;
    }

    body{
      min-height:100vh;
      background:
        radial-gradient(circle at 82% 12%, rgba(62,124,191,.10), transparent 28%),
        radial-gradient(circle at 18% 78%, rgba(233,143,114,.08), transparent 26%),
        linear-gradient(180deg, #F7FAFD 0%, #FFFFFF 42%, #F7FAFD 100%);
      color:var(--color-text);
      font-family:var(--font-main);
      font-size:16px;
      line-height:1.75;
      overflow-x:hidden;
    }

    a{
      color:inherit;
      text-decoration:none;
      transition:color .22s ease, background .22s ease, border-color .22s ease, transform .22s ease, box-shadow .22s ease;
    }

    a:hover{
      color:var(--color-primary-dark);
    }

    img{
      max-width:100%;
      display:block;
    }

    button,
    input,
    textarea{
      font:inherit;
    }

    button{
      cursor:pointer;
      border:0;
      background:none;
    }

    :focus-visible{
      outline:3px solid rgba(62,124,191,.28);
      outline-offset:3px;
      border-radius:12px;
    }

    .page-shell{
      min-height:100vh;
      padding-left:var(--rail-width);
    }

    .side-rail{
      position:fixed;
      left:0;
      top:0;
      z-index:50;
      width:var(--rail-width);
      height:100vh;
      background:rgba(234,242,250,.92);
      border-right:1px solid var(--color-border);
      backdrop-filter:blur(16px);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      padding:22px 14px;
    }

    .rail-top{
      display:flex;
      flex-direction:column;
      gap:28px;
      min-height:0;
    }

    .brand{
      display:flex;
      flex-direction:column;
      align-items:center;
      gap:11px;
      padding:10px 6px 14px;
      border-radius:22px;
    }

    .brand:hover{
      background:rgba(255,255,255,.76);
      transform:translateY(-2px);
      box-shadow:0 10px 28px rgba(31,45,61,.08);
    }

    .brand-mark{
      position:relative;
      width:46px;
      height:46px;
      border-radius:17px;
      background:linear-gradient(145deg, #FFFFFF, #DDECF8);
      border:1px solid rgba(62,124,191,.18);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.95), 0 12px 25px rgba(62,124,191,.16);
      overflow:hidden;
    }

    .brand-mark::before{
      content:"";
      position:absolute;
      inset:10px 8px;
      border:2px solid rgba(62,124,191,.45);
      border-radius:8px;
    }

    .brand-mark span{
      position:absolute;
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--color-primary);
      box-shadow:0 0 0 5px rgba(62,124,191,.10);
    }

    .brand-mark .p1{left:11px;top:14px;}
    .brand-mark .p2{right:11px;top:20px;background:var(--color-accent);}
    .brand-mark .p3{left:20px;bottom:11px;}

    .brand-text{
      display:flex;
      align-items:center;
      flex-direction:column;
      text-align:center;
      gap:4px;
      writing-mode:vertical-rl;
    }

    .brand-text strong{
      font-size:14px;
      line-height:1.25;
      letter-spacing:.06em;
      color:var(--color-text);
      font-weight:800;
    }

    .brand-text small{
      font-size:10px;
      color:var(--color-muted);
      letter-spacing:.08em;
      line-height:1.2;
      max-height:150px;
    }

    .rail-nav{
      display:flex;
      flex-direction:column;
      gap:10px;
      align-items:center;
    }

    .nav-link{
      width:78px;
      min-height:42px;
      display:flex;
      align-items:center;
      justify-content:center;
      padding:9px 8px;
      border-radius:999px;
      color:#52657A;
      font-size:14px;
      font-weight:700;
      border:1px solid transparent;
    }

    .nav-link:hover{
      background:rgba(255,255,255,.78);
      border-color:var(--color-border-strong);
      transform:translateX(2px);
      color:var(--color-primary-dark);
    }

    .nav-link.active{
      color:var(--color-primary-dark);
      background:#FFFFFF;
      border-color:rgba(62,124,191,.20);
      box-shadow:0 10px 26px rgba(62,124,191,.12);
    }

    .rail-foot{
      display:flex;
      flex-direction:column;
      align-items:center;
      gap:8px;
      color:var(--color-muted);
      text-align:center;
    }

    .age-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:46px;
      height:30px;
      border-radius:999px;
      background:rgba(233,143,114,.12);
      color:#B96047;
      font-weight:800;
      border:1px solid rgba(233,143,114,.28);
    }

    .rail-foot small{
      font-size:11px;
      line-height:1.35;
    }

    .main-wrap{
      width:100%;
    }

    .container{
      width:min(calc(100% - 48px), var(--container));
      margin:0 auto;
    }

    .article-hero{
      position:relative;
      padding:58px 0 38px;
    }

    .article-hero::before{
      content:"";
      position:absolute;
      top:28px;
      right:4vw;
      width:210px;
      height:210px;
      background-image:
        linear-gradient(rgba(62,124,191,.13) 1px, transparent 1px),
        linear-gradient(90deg, rgba(62,124,191,.13) 1px, transparent 1px);
      background-size:20px 20px;
      border-radius:34px;
      transform:rotate(7deg);
      opacity:.45;
      pointer-events:none;
    }

    .breadcrumb{
      position:relative;
      z-index:1;
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:24px;
      color:var(--color-muted);
      font-size:14px;
    }

    .breadcrumb a{
      color:#52657A;
      font-weight:650;
    }

    .breadcrumb a:hover{
      color:var(--color-primary-dark);
      text-decoration:underline;
      text-underline-offset:4px;
    }

    .breadcrumb .sep{
      color:#A6B6C7;
    }

    .article-head-card{
      position:relative;
      z-index:1;
      background:rgba(255,255,255,.86);
      border:1px solid rgba(221,231,240,.95);
      border-radius:30px;
      box-shadow:var(--shadow-soft);
      padding:42px;
      overflow:hidden;
    }

    .article-head-card::after{
      content:"";
      position:absolute;
      right:-60px;
      bottom:-70px;
      width:220px;
      height:220px;
      border-radius:50%;
      background:linear-gradient(145deg, rgba(62,124,191,.12), rgba(233,143,114,.10));
      pointer-events:none;
    }

    .kicker-row{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:18px;
    }

    .badge{
      display:inline-flex;
      align-items:center;
      gap:7px;
      min-height:30px;
      padding:5px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:750;
      letter-spacing:.01em;
      border:1px solid rgba(62,124,191,.18);
      background:var(--color-primary-soft);
      color:var(--color-primary-dark);
    }

    .badge.orange{
      background:rgba(233,143,114,.12);
      color:#B96047;
      border-color:rgba(233,143,114,.24);
    }

    .article-title{
      max-width:920px;
      color:var(--color-text);
      font-size:clamp(30px, 4.2vw, 46px);
      line-height:1.18;
      font-weight:850;
      letter-spacing:-.03em;
      margin-bottom:20px;
    }

    .article-desc{
      max-width:860px;
      padding:18px 20px;
      border-left:4px solid var(--color-primary);
      border-radius:0 18px 18px 0;
      background:linear-gradient(90deg, rgba(234,242,250,.86), rgba(255,255,255,.70));
      color:#4E6176;
      font-size:17px;
      line-height:1.85;
      margin-bottom:24px;
    }

    .meta-grid{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      color:#617389;
      font-size:14px;
    }

    .meta-item{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 12px;
      border:1px solid var(--color-border);
      background:rgba(247,250,253,.82);
      border-radius:999px;
    }

    .meta-dot{
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--color-primary);
    }

    .reading-layout{
      display:grid;
      grid-template-columns:minmax(0, 780px) 330px;
      gap:34px;
      align-items:start;
      padding:34px 0 76px;
    }

    .content-card{
      background:rgba(255,255,255,.92);
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      padding:38px;
    }

    .adult-note{
      display:flex;
      gap:14px;
      align-items:flex-start;
      padding:18px 20px;
      margin-bottom:28px;
      border-radius:18px;
      background:rgba(233,143,114,.10);
      border:1px solid rgba(233,143,114,.24);
      color:#795242;
    }

    .adult-note strong{
      color:#B96047;
    }

    .note-icon{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:34px;
      height:34px;
      border-radius:12px;
      background:#FFFFFF;
      color:#B96047;
      font-weight:900;
      box-shadow:0 8px 18px rgba(233,143,114,.15);
    }

    .article-body{
      color:#25364A;
      font-size:17px;
      line-height:1.9;
      word-break:break-word;
    }

    .article-body > *:first-child{
      margin-top:0;
    }

    .article-body p{
      margin:0 0 20px;
    }

    .article-body h2{
      position:relative;
      margin:38px 0 18px;
      padding-top:8px;
      color:var(--color-text);
      font-size:28px;
      line-height:1.35;
      font-weight:820;
      letter-spacing:-.02em;
    }

    .article-body h2::before{
      content:"";
      display:block;
      width:46px;
      height:4px;
      border-radius:999px;
      background:linear-gradient(90deg, var(--color-primary), var(--color-accent));
      margin-bottom:12px;
    }

    .article-body h3{
      margin:30px 0 14px;
      color:#26384B;
      font-size:22px;
      line-height:1.4;
      font-weight:780;
    }

    .article-body h4{
      margin:24px 0 10px;
      font-size:19px;
      font-weight:760;
    }

    .article-body a{
      color:var(--color-primary-dark);
      font-weight:700;
      text-decoration:underline;
      text-underline-offset:4px;
      text-decoration-thickness:1px;
    }

    .article-body a:hover{
      color:#1F5E98;
      text-decoration-thickness:2px;
    }

    .article-body ul,
    .article-body ol{
      margin:0 0 22px 22px;
      padding-left:14px;
    }

    .article-body li{
      margin:8px 0;
      padding-left:4px;
    }

    .article-body blockquote{
      margin:28px 0;
      padding:22px 24px;
      border-left:5px solid var(--color-primary);
      border-radius:0 18px 18px 0;
      background:linear-gradient(90deg, rgba(234,242,250,.92), rgba(247,250,253,.72));
      color:#506277;
      font-weight:520;
    }

    .article-body figure{
      margin:30px 0;
    }

    .article-body figcaption{
      margin-top:10px;
      text-align:center;
      color:var(--color-muted);
      font-size:14px;
    }

    .article-body img{
      width:auto;
      max-width:100%;
      height:auto;
      border-radius:20px;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-card);
      margin:26px auto;
      background:var(--color-primary-soft);
    }

    .article-body table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      overflow:hidden;
      border:1px solid var(--color-border);
      border-radius:18px;
      margin:28px 0;
      font-size:15px;
      background:#FFFFFF;
    }

    .article-body th,
    .article-body td{
      padding:14px 16px;
      border-bottom:1px solid var(--color-border);
      text-align:left;
      vertical-align:top;
    }

    .article-body tr:last-child td{
      border-bottom:0;
    }

    .article-body th{
      background:var(--color-primary-soft);
      color:#2A5F93;
      font-weight:780;
    }

    .article-body code{
      padding:2px 7px;
      border-radius:8px;
      background:#EEF5FB;
      color:#2A5F93;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
      font-size:.92em;
    }

    .article-body pre{
      margin:26px 0;
      padding:20px;
      overflow:auto;
      border-radius:18px;
      background:#152538;
      color:#EAF2FA;
      box-shadow:var(--shadow-card);
    }

    .article-body pre code{
      padding:0;
      background:transparent;
      color:inherit;
    }

    .article-body hr{
      border:0;
      height:1px;
      background:linear-gradient(90deg, transparent, var(--color-border), transparent);
      margin:34px 0;
    }

    .not-found{
      text-align:center;
      padding:42px 18px;
      border:1px dashed var(--color-border-strong);
      border-radius:22px;
      background:linear-gradient(145deg, rgba(234,242,250,.78), rgba(255,255,255,.86));
    }

    .not-found h2{
      margin:0 0 10px;
      font-size:28px;
      color:var(--color-text);
    }

    .not-found p{
      color:var(--color-muted);
      margin-bottom:22px;
    }

    .sidebar{
      position:sticky;
      top:24px;
      display:flex;
      flex-direction:column;
      gap:18px;
    }

    .side-card{
      background:rgba(255,255,255,.90);
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      padding:24px;
      overflow:hidden;
    }

    .side-card h2,
    .side-card h3{
      margin-bottom:12px;
      font-size:20px;
      line-height:1.35;
      font-weight:820;
      color:var(--color-text);
    }

    .side-card p{
      color:var(--color-muted);
      font-size:14px;
      line-height:1.75;
    }

    .info-list{
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:14px;
      list-style:none;
    }

    .info-list li{
      display:flex;
      align-items:flex-start;
      gap:9px;
      color:#52657A;
      font-size:14px;
      line-height:1.6;
    }

    .check{
      flex:0 0 auto;
      width:18px;
      height:18px;
      margin-top:2px;
      border-radius:50%;
      background:rgba(62,124,191,.12);
      color:var(--color-primary-dark);
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-size:12px;
      font-weight:900;
    }

    .abstract-cover{
      position:relative;
      height:150px;
      margin:-4px -4px 18px;
      border-radius:20px;
      overflow:hidden;
      background:
        linear-gradient(135deg, rgba(62,124,191,.18), rgba(233,143,114,.12)),
        repeating-linear-gradient(45deg, rgba(255,255,255,.42) 0 8px, rgba(234,242,250,.62) 8px 16px);
      border:1px solid rgba(62,124,191,.13);
    }

    .abstract-cover::before,
    .abstract-cover::after{
      content:"";
      position:absolute;
      border-radius:999px;
      background:rgba(255,255,255,.78);
      box-shadow:0 12px 30px rgba(62,124,191,.14);
    }

    .abstract-cover::before{
      left:24px;
      top:35px;
      width:94px;
      height:16px;
    }

    .abstract-cover::after{
      right:28px;
      bottom:34px;
      width:54px;
      height:54px;
      border:12px solid rgba(62,124,191,.18);
      background:transparent;
    }

    .btn-row{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:20px;
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      font-weight:760;
      font-size:15px;
      border:1px solid transparent;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease;
    }

    .btn.primary{
      color:#FFFFFF;
      background:var(--color-primary);
      box-shadow:0 14px 28px rgba(62,124,191,.22);
    }

    .btn.primary:hover{
      color:#FFFFFF;
      background:var(--color-primary-dark);
      transform:translateY(-2px);
      box-shadow:0 18px 34px rgba(62,124,191,.28);
    }

    .btn.secondary{
      color:var(--color-primary-dark);
      background:#FFFFFF;
      border-color:var(--color-border-strong);
    }

    .btn.secondary:hover{
      background:var(--color-primary-soft);
      border-color:rgba(62,124,191,.35);
      transform:translateY(-2px);
    }

    .related-section{
      padding:0 0 78px;
    }

    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:24px;
      margin-bottom:24px;
    }

    .section-head h2{
      font-size:30px;
      line-height:1.25;
      letter-spacing:-.02em;
      color:var(--color-text);
      font-weight:850;
    }

    .section-head p{
      max-width:620px;
      color:var(--color-muted);
      line-height:1.75;
    }

    .related-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0, 1fr));
      gap:18px;
    }

    .related-card{
      position:relative;
      min-height:210px;
      padding:24px;
      border-radius:var(--radius-lg);
      border:1px solid var(--color-border);
      background:#FFFFFF;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }

    .related-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(62,124,191,.32);
    }

    .related-card::after{
      content:"";
      position:absolute;
      right:-28px;
      bottom:-32px;
      width:108px;
      height:108px;
      border-radius:30px;
      background:linear-gradient(145deg, rgba(62,124,191,.10), rgba(233,143,114,.10));
      transform:rotate(18deg);
    }

    .related-card .badge{
      margin-bottom:14px;
      position:relative;
      z-index:1;
    }

    .related-card h3{
      position:relative;
      z-index:1;
      margin-bottom:10px;
      font-size:20px;
      line-height:1.45;
      font-weight:820;
      color:var(--color-text);
    }

    .related-card p{
      position:relative;
      z-index:1;
      color:var(--color-muted);
      font-size:14px;
      line-height:1.75;
      margin-bottom:18px;
    }

    .text-link{
      position:relative;
      z-index:1;
      color:var(--color-primary-dark);
      font-weight:780;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }

    .text-link:hover{
      gap:10px;
      text-decoration:underline;
      text-underline-offset:4px;
    }

    .cta-section{
      padding:0 0 82px;
    }

    .cta-panel{
      position:relative;
      overflow:hidden;
      display:grid;
      grid-template-columns:minmax(0, 1.2fr) minmax(280px, .8fr);
      gap:28px;
      align-items:center;
      padding:34px;
      border-radius:30px;
      background:
        linear-gradient(135deg, rgba(234,242,250,.96), rgba(255,255,255,.96)),
        radial-gradient(circle at 86% 20%, rgba(233,143,114,.16), transparent 26%);
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-soft);
    }

    .cta-panel::before{
      content:"";
      position:absolute;
      inset:auto 24px 22px auto;
      width:170px;
      height:110px;
      border:1px solid rgba(62,124,191,.16);
      border-radius:26px;
      background-image:
        linear-gradient(rgba(62,124,191,.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(62,124,191,.12) 1px, transparent 1px);
      background-size:18px 18px;
      opacity:.58;
    }

    .cta-panel h2{
      position:relative;
      z-index:1;
      font-size:30px;
      line-height:1.3;
      margin-bottom:10px;
      font-weight:850;
    }

    .cta-panel p{
      position:relative;
      z-index:1;
      color:var(--color-muted);
      max-width:680px;
    }

    .mini-form{
      position:relative;
      z-index:1;
      display:grid;
      gap:12px;
      padding:20px;
      border-radius:22px;
      background:#FFFFFF;
      border:1px solid var(--color-border);
      box-shadow:0 16px 34px rgba(31,45,61,.08);
    }

    .mini-form label{
      display:grid;
      gap:6px;
      color:#52657A;
      font-size:13px;
      font-weight:700;
    }

    .mini-form input,
    .mini-form textarea{
      width:100%;
      border:1px solid var(--color-border);
      border-radius:14px;
      background:#FDFEFF;
      color:var(--color-text);
      padding:12px 13px;
      outline:none;
      transition:border-color .22s ease, box-shadow .22s ease, background .22s ease;
    }

    .mini-form textarea{
      min-height:82px;
      resize:vertical;
    }

    .mini-form input:focus,
    .mini-form textarea:focus{
      border-color:rgba(62,124,191,.68);
      box-shadow:0 0 0 4px rgba(62,124,191,.14);
      background:#FFFFFF;
    }

    .form-tip{
      color:var(--color-muted);
      font-size:12px;
      line-height:1.55;
    }

    .footer{
      padding:0 0 30px;
    }

    .footer-panel{
      width:min(calc(100% - 48px), var(--container));
      margin:0 auto;
      padding:30px;
      border-radius:30px 30px 0 0;
      background:rgba(234,242,250,.94);
      border:1px solid var(--color-border);
      box-shadow:0 -12px 38px rgba(31,45,61,.05);
    }

    .footer-top{
      display:grid;
      grid-template-columns:1.2fr .7fr 1fr;
      gap:30px;
      padding-bottom:22px;
      border-bottom:1px solid rgba(207,224,242,.9);
    }

    .footer h3{
      margin-bottom:10px;
      font-size:18px;
      font-weight:830;
      color:var(--color-text);
    }

    .footer p{
      color:#617389;
      font-size:14px;
      line-height:1.75;
    }

    .footer-links{
      list-style:none;
      display:grid;
      gap:8px;
    }

    .footer-links a{
      color:#52657A;
      font-weight:650;
    }

    .footer-links a:hover{
      color:var(--color-primary-dark);
      text-decoration:underline;
      text-underline-offset:4px;
    }

    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      padding-top:18px;
      color:#6D7E90;
      font-size:13px;
    }

    @media (max-width:1120px){
      :root{
        --rail-width:96px;
      }

      .container,
      .footer-panel{
        width:min(calc(100% - 36px), var(--container));
      }

      .reading-layout{
        grid-template-columns:minmax(0, 1fr);
      }

      .sidebar{
        position:static;
        display:grid;
        grid-template-columns:repeat(2, minmax(0, 1fr));
      }

      .side-card:last-child{
        grid-column:1 / -1;
      }

      .related-grid{
        grid-template-columns:repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width:900px){
      .article-head-card{
        padding:32px;
      }

      .content-card{
        padding:30px;
      }

      .cta-panel{
        grid-template-columns:1fr;
      }

      .footer-top{
        grid-template-columns:1fr 1fr;
      }
    }

    @media (max-width:767px){
      body{
        background:
          radial-gradient(circle at 80% 6%, rgba(62,124,191,.10), transparent 30%),
          linear-gradient(180deg, #F7FAFD 0%, #FFFFFF 48%, #F7FAFD 100%);
      }

      .page-shell{
        padding-left:0;
        padding-top:76px;
      }

      .side-rail{
        width:100%;
        height:76px;
        right:0;
        bottom:auto;
        flex-direction:row;
        align-items:center;
        padding:10px 14px;
        background:rgba(255,255,255,.94);
        border-right:0;
        border-bottom:1px solid var(--color-border);
        box-shadow:0 12px 28px rgba(31,45,61,.06);
      }

      .rail-top{
        width:100%;
        flex-direction:row;
        align-items:center;
        justify-content:space-between;
        gap:12px;
      }

      .brand{
        flex-direction:row;
        padding:7px 8px;
        gap:9px;
      }

      .brand-mark{
        width:40px;
        height:40px;
        border-radius:15px;
      }

      .brand-text{
        writing-mode:horizontal-tb;
        align-items:flex-start;
        text-align:left;
        gap:1px;
      }

      .brand-text strong{
        font-size:14px;
        white-space:nowrap;
      }

      .brand-text small{
        display:none;
      }

      .rail-nav{
        flex-direction:row;
        gap:6px;
        overflow-x:auto;
        max-width:52vw;
        justify-content:flex-end;
        padding-bottom:2px;
      }

      .nav-link{
        width:auto;
        min-width:max-content;
        min-height:38px;
        padding:8px 12px;
        font-size:13px;
      }

      .nav-link:hover{
        transform:translateY(-1px);
      }

      .rail-foot{
        display:none;
      }

      .article-hero{
        padding:30px 0 28px;
      }

      .article-hero::before{
        display:none;
      }

      .container,
      .footer-panel{
        width:min(calc(100% - 28px), var(--container));
      }

      .article-head-card{
        border-radius:24px;
        padding:26px 22px;
      }

      .article-desc{
        font-size:16px;
        padding:15px 16px;
      }

      .reading-layout{
        padding:22px 0 58px;
      }

      .content-card{
        border-radius:22px;
        padding:24px 20px;
      }

      .article-body{
        font-size:16px;
        line-height:1.86;
      }

      .article-body h2{
        font-size:24px;
      }

      .article-body h3{
        font-size:20px;
      }

      .article-body table{
        display:block;
        overflow-x:auto;
        white-space:nowrap;
      }

      .sidebar{
        grid-template-columns:1fr;
      }

      .side-card:last-child{
        grid-column:auto;
      }

      .related-grid{
        grid-template-columns:1fr;
      }

      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }

      .section-head h2,
      .cta-panel h2{
        font-size:26px;
      }

      .footer-top{
        grid-template-columns:1fr;
      }
    }

    @media (max-width:520px){
      .side-rail{
        height:auto;
        min-height:72px;
      }

      .page-shell{
        padding-top:72px;
      }

      .rail-nav{
        max-width:42vw;
      }

      .nav-link{
        padding:7px 10px;
      }

      .article-title{
        font-size:28px;
      }

      .kicker-row{
        gap:8px;
      }

      .badge,
      .meta-item{
        font-size:12px;
      }

      .adult-note{
        padding:16px;
      }

      .btn-row{
        flex-direction:column;
      }

      .btn{
        width:100%;
      }

      .cta-panel{
        padding:24px 18px;
        border-radius:24px;
      }

      .mini-form{
        padding:16px;
      }

      .footer-panel{
        padding:24px 18px;
        border-radius:24px 24px 0 0;
      }
    }