:root{
      --bg0:#f7f8fb;
      --bg1:#eef2ff;
      --card:#ffffffcc;
      --card2:#ffffff;
      --text:#0f172a;
      --muted:#475569;
      --muted2:#6b7280;
      --line:rgba(15,23,42,.10);
      --shadow: 0 18px 50px rgba(15,23,42,.10);
      --shadow2: 0 10px 28px rgba(15,23,42,.10);
      --brand1:#22c3ff;
      --brand2:#8a5cff;
      --brand3:#00d6a3;
      --focus:#1d4ed8;
      --radius:18px;
      --radius2:26px;
      --container: 1120px;
    }
    *{box-sizing:border-box}
    html,body{height:100%}
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC","Hiragino Sans GB","Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 600px at 10% -10%, rgba(34,195,255,.22), transparent 60%),
        radial-gradient(900px 520px at 90% 0%, rgba(138,92,255,.20), transparent 55%),
        radial-gradient(800px 460px at 70% 80%, rgba(0,214,163,.12), transparent 58%),
        linear-gradient(180deg, var(--bg1), var(--bg0) 55%, #ffffff 100%);
      overflow-x:hidden;
    }
    a{color:inherit}
    .container{
      width:100%;
      max-width:var(--container);
      margin:0 auto;
      padding:0 20px;
    }
    header{
      position:sticky;
      top:0;
      z-index:30;
      backdrop-filter: blur(10px);
      background: linear-gradient(180deg, rgba(247,248,251,.75), rgba(247,248,251,.55));
      border-bottom:1px solid rgba(15,23,42,.08);
    }
    .nav{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:14px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width: 120px;
    }
    .logo{
      width:44px;height:44px;
      border-radius:14px;
      background:
        radial-gradient(12px 12px at 30% 30%, rgba(255,255,255,.95), rgba(255,255,255,.15) 60%),
        linear-gradient(135deg, rgba(34,195,255,.95), rgba(138,92,255,.95));
      box-shadow: 0 12px 26px rgba(138,92,255,.22), 0 10px 22px rgba(34,195,255,.18);
      display:grid;place-items:center;
      border:1px solid rgba(255,255,255,.55);
    }
    .logo span{
      font-weight:900;
      letter-spacing:1px;
      color:#071022;
      text-shadow: 0 1px 0 rgba(255,255,255,.55);
      font-size:18px;
    }
    .brand-title{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-title strong{font-size:14px}
    .brand-title em{
      font-style:normal;
      font-size:12px;
      color:var(--muted);
      margin-top:4px;
      white-space:nowrap;
    }

    .nav-right{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .nav-links a{
      text-decoration:none;
      padding:9px 10px;
      border-radius:12px;
      border:1px solid transparent;
      color:rgba(15,23,42,.86);
      font-size:13px;
      transition: transform .18s ease, background .18s ease, border-color .18s ease;
    }
    .nav-links a:hover{
      background: rgba(255,255,255,.6);
      border-color: rgba(15,23,42,.10);
      transform: translateY(-1px);
    }
    .cta{
      display:flex;
      align-items:center;
      gap:10px;
      margin-left:4px;
    }
    .btn{
      appearance:none;
      border:1px solid rgba(15,23,42,.12);
      background: rgba(255,255,255,.68);
      color:var(--text);
      padding:10px 14px;
      border-radius:14px;
      font-weight:700;
      font-size:13px;
      cursor:pointer;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
      box-shadow: 0 10px 22px rgba(15,23,42,.08);
      text-decoration:none;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      white-space:nowrap;
    }
    .btn:hover{transform: translateY(-1px); border-color: rgba(15,23,42,.18); background: rgba(255,255,255,.88)}
    .btn.primary{
      border-color: rgba(34,195,255,.35);
      background: linear-gradient(135deg, rgba(34,195,255,.95), rgba(138,92,255,.92));
      color:#06101f;
      box-shadow: 0 16px 40px rgba(138,92,255,.22), 0 12px 26px rgba(34,195,255,.18);
    }
    .btn.primary:hover{box-shadow: 0 18px 50px rgba(138,92,255,.26), 0 12px 28px rgba(34,195,255,.22)}
    .btn .dot{
      width:10px;height:10px;border-radius:50%;
      background: radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,.2) 40%), rgba(7,16,35,.2);
      border:1px solid rgba(255,255,255,.55);
      box-shadow: inset 0 0 0 2px rgba(7,16,35,.08);
    }
    .hamburger{
      display:none;
      width:44px;height:44px;border-radius:14px;
      border:1px solid rgba(15,23,42,.12);
      background: rgba(255,255,255,.7);
      cursor:pointer;
      align-items:center;
      justify-content:center;
      transition: transform .18s ease, background .18s ease;
    }
    .hamburger:hover{transform: translateY(-1px); background: rgba(255,255,255,.92)}
    .hamburger .bars{
      width:18px;height:12px; position:relative;
    }
    .hamburger .bars span{
      position:absolute; left:0; right:0;
      height:2px; background: rgba(15,23,42,.85);
      border-radius:2px;
      transition: transform .2s ease, top .2s ease, opacity .2s ease;
    }
    .hamburger .bars span:nth-child(1){top:0}
    .hamburger .bars span:nth-child(2){top:5px}
    .hamburger .bars span:nth-child(3){top:10px}
    .hamburger[data-open="true"] .bars span:nth-child(1){top:5px; transform: rotate(45deg)}
    .hamburger[data-open="true"] .bars span:nth-child(2){opacity:0}
    .hamburger[data-open="true"] .bars span:nth-child(3){top:5px; transform: rotate(-45deg)}

    .mobile-menu{
      display:none;
      padding:10px 0 16px;
    }
    .mobile-menu .stack{
      display:flex; flex-direction:column; gap:10px;
      padding-top:8px;
    }
    .mobile-menu a{
      text-decoration:none;
      padding:12px 12px;
      border:1px solid rgba(15,23,42,.10);
      border-radius:14px;
      background: rgba(255,255,255,.72);
      font-weight:700;
      font-size:14px;
      color: rgba(15,23,42,.9);
    }

    .hero{
      padding:26px 0 6px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-main{
      position:relative;
      border-radius: var(--radius2);
      padding:22px;
      background:
        linear-gradient(180deg, rgba(255,255,255,.72), rgba(255,255,255,.58)),
        radial-gradient(900px 420px at 12% 0%, rgba(34,195,255,.18), transparent 55%),
        radial-gradient(900px 420px at 90% 10%, rgba(138,92,255,.16), transparent 55%);
      border:1px solid rgba(15,23,42,.10);
      box-shadow: var(--shadow);
      overflow:hidden;
      min-height: 260px;
    }
    .spark{
      position:absolute; inset:-2px;
      background:
        radial-gradient(420px 240px at var(--x,30%) var(--y,20%), rgba(255,255,255,.8), rgba(255,255,255,.0) 55%),
        conic-gradient(from 210deg at 50% 50%, rgba(34,195,255,.35), rgba(138,92,255,.35), rgba(0,214,163,.22), rgba(34,195,255,.35));
      opacity:.12;
      filter:saturate(120%);
      transform: translateZ(0);
      pointer-events:none;
    }
    .hero-content{
      position:relative;
      display:flex;
      flex-direction:column;
      gap:14px;
    }
    .kicker{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.72);
      font-weight:800;
      font-size:12px;
      color: rgba(15,23,42,.88);
    }
    .pill i{
      width:10px;height:10px;border-radius:50%;
      background: linear-gradient(135deg, var(--brand1), var(--brand2));
      box-shadow: 0 10px 20px rgba(34,195,255,.2);
      display:inline-block;
    }
    h1{
      margin:0;
      font-size: clamp(22px, 3.2vw, 34px);
      letter-spacing:-.02em;
      line-height:1.15;
    }
    .lead{
      margin:0;
      color: var(--muted);
      font-size:14.5px;
      line-height:1.7;
      max-width: 62ch;
    }
    .hero-actions{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      align-items:center;
      margin-top:4px;
    }
    .mini-cards{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:6px;
    }
    .mini{
      flex: 1 1 190px;
      min-width: 160px;
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.70);
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .mini:hover{
      transform: translateY(-2px);
      box-shadow: 0 18px 40px rgba(15,23,42,.10);
      border-color: rgba(15,23,42,.16);
    }
    .mini .t{font-weight:900; font-size:13px}
    .mini .d{margin-top:6px; color:var(--muted2); font-size:12.8px; line-height:1.55}
    .hero-side{
      border-radius: var(--radius2);
      padding:18px;
      border:1px solid rgba(15,23,42,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.58));
      box-shadow: var(--shadow2);
      overflow:hidden;
      position:relative;
      min-height: 260px;
    }
    .side-top{
      display:flex; align-items:flex-start; justify-content:space-between; gap:10px;
      margin-bottom:12px;
    }
    .side-top h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.01em;
    }
    .status{
      padding:8px 10px;
      border-radius:14px;
      background: rgba(34,195,255,.10);
      border:1px solid rgba(34,195,255,.25);
      font-weight:900;
      font-size:12px;
      color: rgba(15,23,42,.92);
      white-space:nowrap;
    }
    .side-list{
      display:flex; flex-direction:column; gap:10px;
      margin-top:10px;
    }
    .check{
      display:flex; gap:10px; align-items:flex-start;
      padding:12px 12px;
      border-radius:16px;
      background: rgba(255,255,255,.72);
      border:1px solid rgba(15,23,42,.10);
    }
    .check svg{flex:0 0 auto; margin-top:2px}
    .check strong{font-size:13.5px}
    .check p{margin:6px 0 0; color:var(--muted); font-size:12.8px; line-height:1.6}
    .side-foot{
      margin-top:12px;
      padding-top:12px;
      border-top:1px dashed rgba(15,23,42,.12);
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .side-foot .row{
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      color:var(--muted);
      font-size:12.8px;
    }
    .side-foot .row strong{color:rgba(15,23,42,.92)}
    .side-foot a{ text-decoration:none; }

    .section{
      padding: 14px 0 6px;
    }
    .grid-2{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:16px;
      align-items:start;
    }
    .card{
      border-radius: var(--radius);
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.70);
      box-shadow: 0 10px 28px rgba(15,23,42,.07);
      overflow:hidden;
    }
    .card-inner{padding:16px}
    .card h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.01em;
    }
    .card p{
      margin:10px 0 0;
      color:var(--muted);
      line-height:1.75;
      font-size:14px;
    }

    .toc{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .toc-head{
      display:flex; align-items:center; justify-content:space-between; gap:10px;
      padding-bottom:12px;
      border-bottom:1px solid rgba(15,23,42,.08);
    }
    .toc-head .right{
      display:flex; align-items:center; gap:8px; color:var(--muted);
      font-size:12.8px;
      white-space:nowrap;
    }
    .toc-head .badge{
      width:10px;height:10px;border-radius:50%;
      background: linear-gradient(135deg, rgba(0,214,163,.95), rgba(34,195,255,.9));
      box-shadow: 0 10px 24px rgba(0,214,163,.18);
    }
    .toc-list{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
    }
    .toc-list a{
      text-decoration:none;
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.72);
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .toc-list a:hover{
      transform: translateY(-2px);
      border-color: rgba(15,23,42,.18);
      background: rgba(255,255,255,.92);
    }
    .toc-list .label{
      font-weight:900;
      font-size:13.5px;
      color: rgba(15,23,42,.92);
    }
    .toc-list .arrow{
      width:28px;height:28px;border-radius:10px;
      display:grid;place-items:center;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(34,195,255,.08);
      color: rgba(15,23,42,.9);
      flex:0 0 auto;
    }

    main{padding-bottom: 24px;}
    .content{
      margin-top:14px;
      padding-top:2px;
    }
    .content h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.01em;
    }
    .article-sections{
      display:flex; flex-direction:column; gap:14px;
    }
    .article-block{
      padding:16px;
      border-radius: var(--radius);
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.72);
      box-shadow: 0 10px 28px rgba(15,23,42,.07);
      overflow:hidden;
    }
    .article-block .headline{
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
      margin-bottom:10px;
    }
    .article-block h2{margin:0}
    .tag{
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(138,92,255,.22);
      background: rgba(138,92,255,.10);
      font-weight:900;
      font-size:12px;
      color: rgba(15,23,42,.9);
      white-space:nowrap;
    }
    .article-block ol{
      margin:10px 0 0;
      padding-left:18px;
      color:var(--muted);
      line-height:1.8;
      font-size:14px;
    }
    .article-block li{margin:8px 0}
    .note{
      margin:10px 0 0;
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(0,214,163,.22);
      background: rgba(0,214,163,.08);
      color: rgba(15,23,42,.9);
      line-height:1.7;
      font-size:13.8px;
    }
    .split{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:12px;
      margin-top:12px;
    }
    .fact{
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.68);
    }
    .fact strong{display:block; font-size:13.5px}
    .fact span{display:block; margin-top:7px; color:var(--muted); font-size:13.2px; line-height:1.65}

    .faq{
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:10px;
    }
    details{
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.70);
      overflow:hidden;
      transition: border-color .18s ease, background .18s ease, transform .18s ease;
    }
    details[open]{
      border-color: rgba(34,195,255,.35);
      background: rgba(255,255,255,.92);
      transform: translateY(-1px);
    }
    summary{
      cursor:pointer;
      list-style:none;
      padding:14px 14px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
      font-weight:900;
      color: rgba(15,23,42,.92);
      font-size:14.2px;
    }
    summary::-webkit-details-marker{display:none}
    .sum-right{
      width:28px;height:28px;border-radius:10px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(34,195,255,.08);
      display:grid;place-items:center;
      flex:0 0 auto;
      margin-top:2px;
      transition: transform .22s ease;
    }
    details[open] .sum-right{transform: rotate(45deg)}
    .faq-body{
      padding:0 14px 14px 14px;
      color:var(--muted);
      line-height:1.8;
      font-size:14px;
    }
    .faq-body a{
      color:#0b5bd3;
      text-decoration:none;
      border-bottom:1px solid rgba(11,91,211,.35);
    }
    .faq-body a:hover{border-bottom-color: rgba(11,91,211,.7)}
    .conclude{
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .conclude p{
      margin:0;
      color:var(--muted);
      line-height:1.8;
      font-size:14.2px;
    }
    .inner-link{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.72);
    }
    .inner-link .left strong{
      display:block;
      font-size:13.8px;
    }
    .inner-link .left span{
      display:block;
      margin-top:6px;
      color:var(--muted);
      font-size:12.9px;
      line-height:1.6;
    }
    .inner-link .go{
      width:44px;height:44px;border-radius:16px;
      border:1px solid rgba(34,195,255,.35);
      background: linear-gradient(135deg, rgba(34,195,255,.20), rgba(138,92,255,.14));
      display:grid;place-items:center;
      flex:0 0 auto;
    }

    .image-wrap{
      margin-top:10px;
      border-radius: var(--radius);
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.70);
      overflow:hidden;
      box-shadow: 0 10px 28px rgba(15,23,42,.07);
    }
    .image-inner{
      padding:12px;
    }
    .image-frame{
      border-radius:16px;
      overflow:hidden;
      border:1px solid rgba(15,23,42,.08);
      background: rgba(255,255,255,.8);
    }
    img{
      width:100%;
      height:auto;
      display:block;
      object-fit:contain;
    }
    .img-alt{
      padding:10px 2px 2px;
      color:var(--muted2);
      font-size:12.7px;
      line-height:1.6;
    }

    footer{
      background: linear-gradient(180deg, rgba(255,255,255,.35), rgba(255,255,255,.75));
      border-top:1px solid rgba(15,23,42,.08);
      padding:18px 0;
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:start;
    }
    .foot-card{
      border-radius: var(--radius);
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.78);
      padding:14px;
    }
    .foot-card h2{
      margin:0;
      font-size:15.5px;
    }
    .kv{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
      margin-top:10px;
      color:var(--muted);
      font-size:13.8px;
      line-height:1.75;
    }
    .kv b{color: rgba(15,23,42,.92)}
    .qr-row{
      display:flex;
      gap:14px;
      align-items:flex-start;
      margin-top:10px;
      flex-wrap:wrap;
    }
    .qr{
      flex:0 0 auto;
      width:92px;
      border-radius:16px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.9);
      padding:8px;
    }
    .qr img{border-radius:10px}
    .links{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top:10px;
    }
    .chip{
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.72);
      font-weight:900;
      font-size:13px;
      color: rgba(15,23,42,.92);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      display:inline-flex; align-items:center; gap:10px;
    }
    .chip:hover{transform: translateY(-2px); border-color: rgba(15,23,42,.18); background: rgba(255,255,255,.95)}
    .fineprint{
      margin-top:12px;
      color:var(--muted2);
      font-size:12.6px;
      line-height:1.7;
    }
    .copyright{
      margin-top:12px;
      color:var(--muted2);
      font-size:12.6px;
      text-align:center;
    }

    @media (max-width: 980px){
      .hero-grid{grid-template-columns: 1fr; }
      .hero-side{min-height: unset}
      .grid-2{grid-template-columns: 1fr}
      .split{grid-template-columns: 1fr}
      .footer-grid{grid-template-columns: 1fr}
      .nav-links{display:none}
      .hamburger{display:flex}
      .mobile-menu{display:block}
    }

    @media (prefers-reduced-motion: reduce){
      *{scroll-behavior:auto !important}
      .btn, .mini, details, .toc-list a, .chip, .nav-links a{transition:none !important}
    }
    html{scroll-behavior:smooth}
    .fade-in{
      opacity:0;
      transform: translateY(10px);
      animation: up .55s ease forwards;
    }
    @keyframes up{
      to{opacity:1; transform: translateY(0)}
    }