:root{
      --bg:#fbf7f1;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#5b6576;
      --brand:#0b3a2a;
      --brand2:#0a67d0;
      --line:rgba(17,24,39,.10);
      --shadow:0 10px 30px rgba(17,24,39,.08);
      --shadow2:0 6px 18px rgba(17,24,39,.10);
      --radius:18px;
      --radius2:14px;
      --ring:rgba(10,103,208,.28);
      --focus:#0a67d0;
      --cta1:#0b3a2a;
      --cta2:#0a67d0;
    }
    *{box-sizing:border-box}
    html,body{height:100%}
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC", sans-serif;
      background:
        radial-gradient(1200px 600px at 15% 5%, rgba(10,103,208,.10), rgba(10,103,208,0) 60%),
        radial-gradient(900px 520px at 80% 15%, rgba(11,58,42,.10), rgba(11,58,42,0) 55%),
        linear-gradient(180deg, #fbf7f1 0%, #ffffff 55%, #fbf7f1 100%);
      color:var(--text);
    }
    a{color:inherit}
    .container{
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
    }

    .skip{
      position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
    }
    .skip:focus{
      left:16px; top:16px; width:auto; height:auto; z-index:9999;
      background:#fff; padding:10px 12px; border-radius:12px; box-shadow:var(--shadow2);
      outline:2px solid var(--focus);
    }

    header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter: blur(10px);
      background: rgba(251,247,241,.72);
      border-bottom: 1px solid rgba(17,24,39,.08);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:14px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width: 140px;
    }
    .logo{
      width:38px; height:38px;
      border-radius:12px;
      background: linear-gradient(145deg, rgba(11,58,42,1) 0%, rgba(10,103,208,1) 100%);
      color:#fff;
      display:flex; align-items:center; justify-content:center;
      font-weight:800;
      letter-spacing:.5px;
      box-shadow: 0 10px 20px rgba(10,103,208,.18);
      position:relative;
      overflow:hidden;
    }
    .logo::after{
      content:"";
      position:absolute; inset:-40% -10% auto -10%;
      height:90px;
      transform: rotate(15deg);
      background: linear-gradient(90deg, rgba(255,255,255,.0), rgba(255,255,255,.55), rgba(255,255,255,.0));
      animation: shine 3.8s ease-in-out infinite;
      opacity:.55;
    }
    @keyframes shine{
      0%,35%{transform:translateX(-55px) rotate(15deg); opacity:.0}
      55%{opacity:.55}
      85%,100%{transform:translateX(120px) rotate(15deg); opacity:.0}
    }
    .brand-text{
      display:flex; flex-direction:column; line-height:1.1;
    }
    .brand-text strong{font-size:14px; letter-spacing:.2px}
    .brand-text span{font-size:12px; color:var(--muted); margin-top:3px}

    .nav{
      display:flex;
      align-items:center;
      gap:16px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .nav a{
      text-decoration:none;
      font-size:14px;
      color:var(--muted);
      padding:8px 10px;
      border-radius:12px;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }
    .nav a:hover{
      background: rgba(10,103,208,.08);
      color:#0b3a2a;
      transform: translateY(-1px);
    }
    .nav .cta{
      display:flex; align-items:center; gap:10px;
      margin-left:6px;
    }
    .btn{
      appearance:none;
      border:1px solid transparent;
      background:#fff;
      color:#0b3a2a;
      padding:10px 14px;
      border-radius:14px;
      text-decoration:none;
      display:inline-flex;
      align-items:center;
      gap:10px;
      font-weight:700;
      font-size:14px;
      box-shadow: 0 10px 25px rgba(17,24,39,.06);
      transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
      white-space:nowrap;
    }
    .btn:hover{
      transform: translateY(-1px);
      box-shadow: 0 14px 35px rgba(17,24,39,.10);
      background:#fff;
      border-color: rgba(10,103,208,.18);
    }
    .btn-primary{
      background: linear-gradient(145deg, rgba(11,58,42,1) 0%, rgba(10,103,208,1) 100%);
      color:#fff;
      border-color: rgba(255,255,255,.12);
      box-shadow: 0 16px 45px rgba(10,103,208,.18);
    }
    .btn-primary:hover{
      box-shadow: 0 18px 55px rgba(10,103,208,.24);
    }
    .btn:focus, .nav a:focus, .chip:focus, .accordion button:focus, input:focus, select:focus, textarea:focus{
      outline: 2px solid var(--ring);
      outline-offset:2px;
    }

    .mobile-toggle{
      display:none;
      border:1px solid rgba(17,24,39,.12);
      background:#fff;
      border-radius:14px;
      padding:10px 12px;
      cursor:pointer;
      box-shadow: 0 10px 25px rgba(17,24,39,.06);
      transition: transform .15s ease, box-shadow .15s ease;
    }
    .mobile-toggle:hover{
      transform: translateY(-1px);
      box-shadow: 0 14px 35px rgba(17,24,39,.10);
    }
    .burger{
      width:18px; height:12px; position:relative;
    }
    .burger span{
      position:absolute; left:0; right:0;
      height:2px; background:rgba(31,41,55,.75);
      border-radius:999px;
      transition: transform .2s ease, top .2s ease, opacity .2s ease;
    }
    .burger span:nth-child(1){top:0}
    .burger span:nth-child(2){top:5px}
    .burger span:nth-child(3){top:10px}
    .mobile-toggle[aria-expanded="true"] .burger span:nth-child(1){top:5px; transform: rotate(45deg)}
    .mobile-toggle[aria-expanded="true"] .burger span:nth-child(2){opacity:0}
    .mobile-toggle[aria-expanded="true"] .burger span:nth-child(3){top:5px; transform: rotate(-45deg)}

    .mobile-panel{
      display:none;
      padding-bottom:14px;
    }
    .mobile-panel.open{display:block}
    .mobile-panel .mobile-links{
      display:flex;
      flex-direction:column;
      gap:8px;
      padding: 10px 0 6px;
      border-top:1px solid rgba(17,24,39,.08);
    }
    .mobile-panel .mobile-links a{
      color:var(--text);
      text-decoration:none;
      background:#fff;
      border:1px solid rgba(17,24,39,.10);
      padding:12px 12px;
      border-radius:14px;
      font-weight:700;
    }
    .mobile-panel .mobile-actions{
      display:flex;
      gap:12px;
      margin-top:12px;
      flex-wrap:wrap;
    }
    .mobile-panel .mobile-actions .btn{flex:1; justify-content:center}

    .hero{
      padding: 26px 0 16px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-card{
      background: linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.96));
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-card::before{
      content:"";
      position:absolute; inset:-1px;
      background:
        radial-gradient(800px 220px at 18% 10%, rgba(10,103,208,.18), rgba(10,103,208,0) 60%),
        radial-gradient(600px 220px at 80% 0%, rgba(11,58,42,.16), rgba(11,58,42,0) 60%);
      pointer-events:none;
      opacity:.9;
    }
    .hero-inner{
      position:relative;
      padding: 22px 22px 18px;
      height:100%;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:16px;
    }
    .hero-title{
      margin:0;
      font-size: clamp(22px, 3.2vw, 34px);
      letter-spacing:-.5px;
      line-height:1.15;
    }
    .hero-sub{
      margin:10px 0 0;
      color:var(--muted);
      font-size:14px;
      line-height:1.6;
      max-width: 62ch;
    }
    .hero-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      margin-top:14px;
    }
    .hero-metas{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:6px;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:10px;
      padding:10px 12px;
      border-radius: 999px;
      background: rgba(255,255,255,.72);
      border:1px solid rgba(17,24,39,.10);
      color:#113;
      font-weight:800;
      font-size:13px;
      user-select:none;
      transition: transform .18s ease, background .18s ease, border-color .18s ease;
    }
    .chip:hover{
      transform: translateY(-1px);
      border-color: rgba(10,103,208,.22);
      background: rgba(255,255,255,.92);
    }
    .chip i{
      width:10px; height:10px; border-radius:50%;
      background: linear-gradient(145deg, rgba(11,58,42,1), rgba(10,103,208,1));
      box-shadow: 0 10px 18px rgba(10,103,208,.16);
    }
    .hero-side{
      background: rgba(255,255,255,.92);
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 16px;
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .side-top{
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:flex-start;
    }
    .side-top h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .side-note{
      margin:6px 0 0;
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
    }
    .price-box{
      border-radius: 16px;
      border:1px dashed rgba(10,103,208,.30);
      background: linear-gradient(180deg, rgba(10,103,208,.06), rgba(10,103,208,.02));
      padding: 12px 12px;
    }
    .price-row{
      display:flex;
      align-items:baseline;
      gap:10px;
      flex-wrap:wrap;
    }
    .price{
      font-weight:900;
      font-size: 26px;
      letter-spacing:-.6px;
      color: #0b3a2a;
    }
    .price-tip{
      color:var(--muted);
      font-weight:700;
      font-size:13px;
      line-height:1.4;
    }
    .price-list{
      display:grid;
      gap:10px;
      margin-top:10px;
    }
    .bullet{
      display:flex; gap:10px;
      align-items:flex-start;
    }
    .bullet b{
      width:22px; height:22px; border-radius:9px;
      display:flex; align-items:center; justify-content:center;
      background: rgba(10,103,208,.10);
      border:1px solid rgba(10,103,208,.20);
      color:#0a67d0;
      flex:0 0 auto;
      font-size:12px;
    }
    .bullet span{
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
    }

    .section{
      padding: 14px 0;
    }
    .section h2{
      margin: 0 0 10px;
      font-size: 18px;
      letter-spacing: -.2px;
    }
    .grid-3{
      display:grid;
      grid-template-columns: repeat(3, 1fr);
      gap:12px;
      align-items:start;
    }
    .card{
      background: rgba(255,255,255,.92);
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius2);
      padding: 14px;
      box-shadow: 0 10px 25px rgba(17,24,39,.05);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
      position:relative;
      overflow:hidden;
    }
    .card:hover{
      transform: translateY(-2px);
      box-shadow: var(--shadow2);
      border-color: rgba(10,103,208,.18);
    }
    .card h3{
      margin:0;
      font-size:15px;
      letter-spacing:-.1px;
    }
    .card p{
      margin:8px 0 0;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .card .tag{
      margin-top:10px;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 10px;
      border-radius:999px;
      background: rgba(11,58,42,.06);
      border:1px solid rgba(11,58,42,.12);
      color:#0b3a2a;
      font-weight:800;
      font-size:12px;
      user-select:none;
    }
    .card .tag .dot{
      width:8px; height:8px; border-radius:50%;
      background: linear-gradient(145deg, rgba(11,58,42,1), rgba(10,103,208,1));
      display:inline-block;
    }

    .anchor-toc{
      background: rgba(255,255,255,.92);
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius);
      box-shadow: 0 10px 25px rgba(17,24,39,.05);
      padding: 14px;
    }
    .toc-top{
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px; flex-wrap:wrap;
    }
    .toc-top p{
      margin:6px 0 0;
      color:var(--muted);
      font-size:13px; line-height:1.6;
      max-width: 60ch;
    }
    .toc-list{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:10px;
      margin-top:12px;
    }
    .toc-list a{
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      font-weight:800;
      font-size:13px;
      color:var(--text);
    }
    .toc-list a:hover{
      transform: translateY(-1px);
      border-color: rgba(10,103,208,.20);
      background: rgba(10,103,208,.04);
    }
    .toc-list a span{
      color:var(--muted);
      font-weight:800;
      font-size:12px;
    }
    .toc-list a .arrow{
      width:30px; height:30px; border-radius:12px;
      border:1px solid rgba(10,103,208,.18);
      display:flex; align-items:center; justify-content:center;
      background: rgba(10,103,208,.06);
      flex:0 0 auto;
      color:#0a67d0;
      transition: transform .18s ease;
    }
    .toc-list a:hover .arrow{transform: translateX(2px)}

    .two-col{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:14px;
      align-items:start;
    }
    .list{
      margin:10px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:10px;
    }
    .list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
    }
    .check{
      width:22px; height:22px;
      border-radius:9px;
      background: rgba(11,58,42,.08);
      border:1px solid rgba(11,58,42,.14);
      color:#0b3a2a;
      display:flex; align-items:center; justify-content:center;
      flex:0 0 auto;
      font-weight:900;
      font-size:12px;
      margin-top:2px;
    }
    .list b{
      display:block;
      font-size:14px;
      letter-spacing:-.1px;
    }
    .list span{
      display:block;
      margin-top:4px;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }

    .steps{
      display:grid;
      gap:10px;
      margin-top:10px;
    }
    .step{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
    }
    .num{
      width:36px; height:36px;
      border-radius:14px;
      background: linear-gradient(145deg, rgba(11,58,42,1), rgba(10,103,208,1));
      color:#fff;
      display:flex; align-items:center; justify-content:center;
      font-weight:900;
      box-shadow: 0 16px 35px rgba(10,103,208,.18);
      flex:0 0 auto;
    }
    .step h3{
      margin:2px 0 0;
      font-size:14px;
    }
    .step p{
      margin:6px 0 0;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }

    .accordion{
      background: rgba(255,255,255,.92);
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius);
      box-shadow: 0 10px 25px rgba(17,24,39,.05);
      overflow:hidden;
    }
    .accordion details{
      border-top:1px solid rgba(17,24,39,.08);
    }
    .accordion details:first-child{border-top:none}
    .accordion summary{
      list-style:none;
      cursor:pointer;
      padding: 14px 14px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
      font-weight:900;
      font-size:14px;
      letter-spacing:-.1px;
    }
    .accordion summary::-webkit-details-marker{display:none}
    .acc-left{
      display:flex; gap:10px; align-items:flex-start;
      line-height:1.5;
    }
    .qmark{
      width:26px; height:26px;
      border-radius:11px;
      background: rgba(10,103,208,.08);
      border:1px solid rgba(10,103,208,.18);
      color:#0a67d0;
      display:flex; align-items:center; justify-content:center;
      font-weight:900;
      flex:0 0 auto;
      margin-top:1px;
    }
    .chev{
      width:34px; height:34px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      display:flex; align-items:center; justify-content:center;
      color:var(--muted);
      flex:0 0 auto;
      transition: transform .2s ease;
      margin-top:-2px;
    }
    details[open] .chev{transform: rotate(180deg)}
    .accordion .acc-body{
      padding: 0 14px 14px;
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }
    .acc-body a{
      color:#0a67d0;
      text-decoration:none;
      font-weight:900;
    }
    .acc-body a:hover{text-decoration:underline}

    .cta-strip{
      background: linear-gradient(180deg, rgba(11,58,42,.05), rgba(10,103,208,.04));
      border:1px solid rgba(17,24,39,.10);
      border-radius: var(--radius);
      box-shadow: 0 10px 25px rgba(17,24,39,.05);
      padding: 16px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
    }
    .cta-strip h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.2px;
    }
    .cta-strip p{
      margin:6px 0 0;
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
      max-width: 62ch;
    }
    .cta-strip .actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      align-items:center;
      justify-content:flex-end;
    }
    .cta-strip .actions .btn{justify-content:center}

    footer{
      margin-top: 10px;
      background: #0b3a2a;
      color: #eaf2ef;
      border-top: 1px solid rgba(255,255,255,.10);
    }
    footer .foot-inner{
      padding: 18px 0 10px;
    }
    .foot-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:start;
    }
    .foot-card{
      background: rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.12);
      border-radius: 16px;
      padding: 14px;
    }
    .foot-card h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.2px;
      color:#fff;
    }
    .foot-card p{
      margin:8px 0 0;
      color: rgba(234,242,239,.86);
      font-size:13px;
      line-height:1.75;
    }
    .foot-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:12px;
    }
    .foot-links a{
      color:#eaf2ef;
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      background: rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
      font-weight:900;
      font-size:13px;
      transition: transform .18s ease, background .18s ease;
    }
    .foot-links a:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.12);
    }
    .qr-wrap{
      display:flex;
      gap:12px;
      align-items:center;
      justify-content:space-between;
      flex-wrap:wrap;
    }
    .qr-block{
      display:flex;
      flex-direction:column;
      gap:8px;
      min-width: 170px;
    }
    .qr-block .label{
      color: rgba(234,242,239,.88);
      font-size:13px;
      font-weight:900;
    }
    .qr-img{
      width:110px;
      aspect-ratio:1/1;
      border-radius:16px;
      background: rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
      padding:8px;
      display:flex;
      align-items:center;
      justify-content:center;
    }
    .qr-img img{
      width:100%;
      height:auto;
      border-radius:12px;
      display:block;
    }
    .foot-bottom{
      padding: 10px 0 18px;
      color: rgba(234,242,239,.80);
      font-size:12px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      flex-wrap:wrap;
    }
    .inline-code{
      font-weight:900;
      color:#fff;
      background: rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.14);
      padding:6px 10px;
      border-radius:999px;
    }

    .fade-in{
      opacity:0;
      transform: translateY(10px);
      animation: up .6s ease-out forwards;
    }
    @keyframes up{
      to{opacity:1; transform: translateY(0)}
    }

    @media (max-width: 980px){
      .hero-grid{grid-template-columns: 1fr; }
      .grid-3{grid-template-columns: 1fr; }
      .two-col{grid-template-columns: 1fr; }
      .toc-list{grid-template-columns: 1fr;}
      .foot-grid{grid-template-columns: 1fr;}
      .mobile-toggle{display:inline-flex; align-items:center; gap:10px}
      .nav{display:none}
      .mobile-panel{display:none}
    }
    @media (prefers-reduced-motion: reduce){
      .fade-in{animation:none}
      .logo::after{animation:none}
      .btn,.card,.nav a,.chip{transition:none}
      .chip:hover,.card:hover,.btn:hover,.nav a:hover{transform:none}
    }