:root{
      --bg:#f7f6f2;
      --panel:#ffffff;
      --text:#1f2937;
      --muted:#6b7280;
      --line:rgba(17,24,39,.10);
      --shadow:0 10px 30px rgba(16,24,40,.06);
      --shadow2:0 6px 18px rgba(16,24,40,.08);
      --brand:#0f6fff;
      --brand2:#1b9e6b;
      --accent:#b7791f;
      --focus: rgba(15,111,255,.22);
      --radius:18px;
      --radius2:14px;
      --max:1120px;
    }
    *{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 CJK SC", sans-serif;
      color:var(--text);
      background:
        radial-gradient(900px 420px at 8% 0%, rgba(15,111,255,.10), transparent 55%),
        radial-gradient(820px 420px at 88% 8%, rgba(27,158,107,.10), transparent 58%),
        linear-gradient(#f8f7f3, #f6f5f0);
    }

    a{color:inherit}
    .skip{
      position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
    }
    .skip:focus{
      left:16px; top:16px; width:auto; height:auto; z-index:9999;
      background:#fff; border:1px solid var(--line); padding:10px 12px; border-radius:12px;
      box-shadow:var(--shadow2);
    }

    .container{
      max-width:var(--max);
      margin:0 auto;
      padding:0 18px;
    }

    header{
      position:sticky; top:0; z-index:20;
      background:rgba(247,246,242,.70);
      backdrop-filter: blur(10px);
      border-bottom:1px solid rgba(17,24,39,.06);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:12px 0;
    }
    .brand{
      display:flex; align-items:center; gap:12px; min-width:180px;
      text-decoration:none;
    }
    .logo{
      width:42px; height:42px; border-radius:14px;
      background: linear-gradient(135deg, rgba(15,111,255,.14), rgba(27,158,107,.14));
      border:1px solid rgba(17,24,39,.10);
      box-shadow:0 10px 24px rgba(15,111,255,.08);
      display:grid; place-items:center;
      font-weight:850; letter-spacing:.5px;
      color:#0b3b7a;
    }
    .brand-title{
      display:flex; flex-direction:column; gap:2px; line-height:1.15;
    }
    .brand-title strong{
      font-size:14px;
      letter-spacing:.2px;
    }
    .brand-title span{
      font-size:12px; color:var(--muted);
    }

    .nav-actions{
      display:flex; align-items:center; justify-content:flex-end; gap:10px;
      min-width:240px;
    }
    .menu-btn{
      border:1px solid var(--line);
      background:#fff;
      padding:10px 12px;
      border-radius:14px;
      box-shadow:0 8px 20px rgba(16,24,40,.05);
      cursor:pointer;
      display:none;
      font-weight:650;
      color:#111827;
    }
    .menu-btn:focus{outline:3px solid var(--focus); outline-offset:2px}
    .menu{
      display:flex; align-items:center; gap:16px;
    }
    .nav-link{
      text-decoration:none;
      color:#334155;
      font-weight:600;
      font-size:14px;
      padding:10px 10px;
      border-radius:12px;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }
    .nav-link:hover{
      background:rgba(15,111,255,.08);
      color:#0b3b7a;
      transform: translateY(-1px);
    }

    .cta{
      display:inline-flex; align-items:center; justify-content:center; gap:10px;
      text-decoration:none;
      padding:10px 14px;
      border-radius:14px;
      border:1px solid rgba(15,111,255,.22);
      background: linear-gradient(135deg, rgba(15,111,255,.12), rgba(15,111,255,.03));
      color:#0b3b7a;
      font-weight:750;
      font-size:14px;
      white-space:nowrap;
      box-shadow:0 10px 26px rgba(15,111,255,.10);
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .cta:hover{
      transform: translateY(-1px);
      box-shadow:0 14px 34px rgba(15,111,255,.14);
      background: linear-gradient(135deg, rgba(15,111,255,.18), rgba(27,158,107,.06));
    }
    .cta:focus{outline:3px solid var(--focus); outline-offset:2px}

    .mobile-panel{
      display:none;
      padding:10px 0 14px;
    }
    .mobile-panel .menu{
      flex-direction:column;
      align-items:stretch;
      gap:8px;
    }
    .mobile-panel .nav-link{padding:12px 12px}
    .mobile-panel .row{
      display:flex; gap:10px; flex-wrap:wrap; margin-top:10px;
    }
    .chip{
      display:inline-flex; align-items:center; gap:8px;
      padding:9px 12px; border-radius:999px;
      border:1px solid var(--line);
      background:#fff;
      text-decoration:none;
      font-weight:650; color:#1f2937;
      transition: transform .2s ease, background .2s ease;
    }
    .chip:hover{transform: translateY(-1px); background:rgba(255,255,255,.9)}
    .chip:focus{outline:3px solid var(--focus); outline-offset:2px}

    main{padding:26px 0 10px}

    .hero{
      position:relative;
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      background:
        radial-gradient(900px 420px at 20% 10%, rgba(15,111,255,.16), transparent 55%),
        radial-gradient(700px 360px at 80% 12%, rgba(27,158,107,.14), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.72));
      box-shadow: var(--shadow);
      overflow:hidden;
    }
    .hero-inner{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:18px;
      padding:22px;
      align-items:start;
    }
    .kicker{
      display:flex; gap:10px; flex-wrap:wrap; align-items:center;
      margin-bottom:10px;
    }
    .badge{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 10px; border-radius:999px;
      background:rgba(255,255,255,.75);
      border:1px solid rgba(17,24,39,.10);
      font-weight:700;
      font-size:13px;
      color:#0b3b7a;
      backdrop-filter: blur(6px);
    }
    .dot{
      width:9px; height:9px; border-radius:50%;
      background:linear-gradient(180deg, var(--brand), rgba(15,111,255,.35));
      box-shadow:0 8px 18px rgba(15,111,255,.22);
    }
    h1{
      margin:0 0 10px;
      font-size:34px;
      letter-spacing:-.6px;
      line-height:1.1;
    }
    .lead{
      margin:0 0 16px;
      color:#374151;
      font-size:15px;
      line-height:1.7;
      max-width:62ch;
    }
    .hero-actions{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      align-items:center;
      margin-top:14px;
    }
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:10px;
      padding:11px 14px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.12);
      background:#fff;
      text-decoration:none;
      font-weight:760;
      color:#111827;
      cursor:pointer;
      box-shadow:0 10px 24px rgba(16,24,40,.05);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
      user-select:none;
    }
    .btn:hover{transform: translateY(-1px); box-shadow:0 14px 30px rgba(16,24,40,.08); border-color:rgba(15,111,255,.22)}
    .btn:focus{outline:3px solid var(--focus); outline-offset:2px}
    .btn-primary{
      border-color: rgba(15,111,255,.22);
      background: linear-gradient(135deg, rgba(15,111,255,.14), rgba(15,111,255,.04));
      color:#0b3b7a;
    }
    .btn-ghost{
      background: rgba(255,255,255,.66);
    }
    .hero-side{
      display:flex; flex-direction:column; gap:12px;
      padding-left:2px;
    }
    .side-card{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(17,24,39,.10);
      border-radius:16px;
      padding:14px;
      box-shadow:0 10px 24px rgba(16,24,40,.04);
    }
    .side-title{
      margin:0 0 8px;
      font-size:14px;
      letter-spacing:.2px;
      color:#0f172a;
      font-weight:800;
    }
    .side-list{
      margin:0; padding:0; list-style:none;
      display:flex; flex-direction:column; gap:10px;
    }
    .side-item{
      display:flex; gap:10px; align-items:flex-start;
      color:#334155; font-size:13px; line-height:1.4;
    }
    .icon{
      width:26px; height:26px; border-radius:10px;
      background: linear-gradient(180deg, rgba(27,158,107,.14), rgba(27,158,107,.05));
      border:1px solid rgba(27,158,107,.25);
      display:grid; place-items:center;
      color:#0b5a3c;
      flex:0 0 auto;
      margin-top:1px;
    }

    .content-grid{
      display:grid;
      grid-template-columns: 1fr;
      gap:14px;
      margin-top:14px;
      align-items:start;
    }
    .section{
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      background: rgba(255,255,255,.78);
      box-shadow:0 12px 30px rgba(16,24,40,.05);
      overflow:hidden;
    }
    .section-inner{
      padding:18px;
    }
    .section-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap:12px;
      margin-bottom:12px;
    }
    h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.2px;
    }
    .sub{
      margin:0; color:var(--muted); font-size:13px; line-height:1.5;
    }

    .toc{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
    }
    .toc a{
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      text-decoration:none;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      transition: transform .2s ease, border-color .2s ease, background .2s ease;
    }
    .toc a:hover{
      transform: translateY(-1px);
      border-color: rgba(15,111,255,.25);
      background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.86));
    }
    .toc .left{
      display:flex; gap:10px; align-items:flex-start;
    }
    .toc .num{
      width:30px; height:30px; border-radius:12px;
      background: rgba(15,111,255,.10);
      border:1px solid rgba(15,111,255,.18);
      display:grid; place-items:center;
      color:#0b3b7a;
      font-weight:850; font-size:13px;
      flex:0 0 auto;
    }
    .toc .txt{
      display:flex; flex-direction:column; gap:3px;
    }
    .toc .txt strong{
      font-size:14px; color:#0f172a;
    }
    .toc .txt span{
      font-size:12.5px; color:var(--muted);
      line-height:1.35;
    }
    .toc .arrow{
      color:#94a3b8;
      font-weight:900;
      transition: transform .2s ease, color .2s ease;
      flex:0 0 auto;
    }
    .toc a:hover .arrow{transform: translateX(2px); color:#0b3b7a}

    .cards{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
    }
    .card{
      border-radius:var(--radius2);
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      padding:14px;
      box-shadow:0 10px 26px rgba(16,24,40,.04);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .card:hover{
      transform: translateY(-2px);
      border-color: rgba(15,111,255,.22);
      box-shadow:0 16px 40px rgba(16,24,40,.08);
    }
    .card h3{
      margin:0 0 8px;
      font-size:15px;
      letter-spacing:-.1px;
    }
    .card p{
      margin:0;
      color:#374151;
      font-size:14px;
      line-height:1.7;
    }
    .card .meta-row{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:10px;
      align-items:center;
    }
    .tag{
      display:inline-flex; align-items:center; gap:8px;
      padding:7px 10px;
      border-radius:999px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(248,250,252,.9);
      color:#334155;
      font-weight:650;
      font-size:12.5px;
    }
    .tag i{
      width:8px; height:8px; border-radius:50%;
      background: linear-gradient(180deg, rgba(15,111,255,.9), rgba(15,111,255,.25));
      display:inline-block;
    }

    .step-wrap{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
      align-items:start;
    }
    .steps{
      border-radius:var(--radius2);
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      padding:14px;
    }
    .step-list{
      margin:0; padding:0; list-style:none;
      display:flex; flex-direction:column; gap:12px;
    }
    .step{
      display:flex; gap:12px; align-items:flex-start;
    }
    .step .bubble{
      width:34px; height:34px; border-radius:14px;
      background: rgba(27,158,107,.10);
      border: 1px solid rgba(27,158,107,.22);
      color:#0b5a3c;
      display:grid; place-items:center;
      font-weight:900;
      flex:0 0 auto;
      margin-top:1px;
    }
    .step .body{
      display:flex; flex-direction:column; gap:4px;
    }
    .step .body strong{
      font-size:14px; color:#0f172a;
    }
    .step .body span{
      color:#374151; font-size:14px; line-height:1.65;
    }
    .note{
      border-radius:var(--radius2);
      border:1px solid rgba(17,24,39,.10);
      background:
        linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.82));
      padding:14px;
    }
    .note h3{margin:0 0 6px; font-size:15px}
    .note p{margin:0; color:#374151; font-size:14px; line-height:1.75}
    .note .call{
      margin-top:12px;
      display:flex; flex-wrap:wrap; gap:10px;
      align-items:center;
    }
    .small-link{
      text-decoration:none;
      display:inline-flex; align-items:center; gap:10px;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(15,111,255,.20);
      background: rgba(15,111,255,.06);
      color:#0b3b7a;
      font-weight:800;
      transition: transform .2s ease, background .2s ease;
      white-space:nowrap;
    }
    .small-link:hover{transform: translateY(-1px); background: rgba(15,111,255,.10)}
    .small-link:focus{outline:3px solid var(--focus); outline-offset:2px}

    .faq{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
    }
    details{
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      border-radius:16px;
      padding:10px 12px;
      box-shadow:0 10px 26px rgba(16,24,40,.04);
      transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    details[open]{
      border-color: rgba(15,111,255,.22);
      box-shadow:0 16px 40px rgba(16,24,40,.08);
      transform: translateY(-1px);
    }
    summary{
      cursor:pointer;
      list-style:none;
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
      padding:6px 2px;
      font-weight:850;
      color:#0f172a;
      outline:none;
    }
    summary::-webkit-details-marker{display:none}
    .sum-body{
      color:#0f172a;
      font-size:14.5px;
      line-height:1.45;
    }
    .plus{
      flex:0 0 auto;
      width:28px; height:28px;
      border-radius:12px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(248,250,252,.9);
      display:grid; place-items:center;
      color:#64748b;
      font-weight:900;
      transition: transform .2s ease, color .2s ease, border-color .2s ease;
      margin-top:-2px;
    }
    details[open] .plus{
      transform: rotate(45deg);
      color:#0b3b7a;
      border-color: rgba(15,111,255,.20);
    }
    .faq p{
      margin:0;
      padding:0 2px 10px;
      color:#374151;
      font-size:14px;
      line-height:1.75;
    }

    .inner-links{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top:12px;
    }
    .inline-a{
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      box-shadow:0 10px 26px rgba(16,24,40,.04);
      font-weight:780;
      color:#0f172a;
      transition: transform .2s ease, border-color .2s ease;
    }
    .inline-a:hover{transform: translateY(-1px); border-color: rgba(27,158,107,.25)}
    .inline-a:focus{outline:3px solid var(--focus); outline-offset:2px}

    .figure{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
      align-items:start;
    }
    .img-card{
      border-radius:var(--radius2);
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      padding:12px;
      box-shadow:0 10px 26px rgba(16,24,40,.04);
    }
    .img-wrap{
      border-radius:14px;
      overflow:hidden;
      border:1px solid rgba(17,24,39,.08);
      background: linear-gradient(180deg, rgba(15,111,255,.05), rgba(27,158,107,.03));
    }
    img{
      width:100%;
      max-width:100%;
      height:auto;
      display:block;
      object-fit:contain;
    }
    figcaption{
      margin-top:10px;
      color:#6b7280;
      font-size:13px;
      line-height:1.6;
    }

    .grid-2{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
      align-items:start;
    }

    footer{
      margin-top:18px;
      background: #ffffff;
      border-top:1px solid rgba(17,24,39,.08);
      padding:18px 0;
      color:#111827;
    }
    .footer-wrap{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .footer-top{
      display:flex; flex-direction:column; gap:10px;
      align-items:flex-start;
      justify-content:space-between;
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
    }
    .f-card{
      border-radius:16px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(248,250,252,.9);
      padding:14px;
    }
    .f-card h3{margin:0 0 8px; font-size:15px}
    .f-card p{margin:0; color:#374151; font-size:14px; line-height:1.75}
    .mono{
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
      font-size:12.5px;
      color:#0f172a;
    }
    .f-links{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top:10px;
    }
    .f-a{
      text-decoration:none;
      display:inline-flex; align-items:center; gap:10px;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      font-weight:800;
      transition: transform .2s ease, border-color .2s ease;
    }
    .f-a:hover{transform: translateY(-1px); border-color: rgba(15,111,255,.22)}
    .f-a:focus{outline:3px solid var(--focus); outline-offset:2px}

    .copyright{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
      justify-content:space-between;
      color:#6b7280;
      font-size:12.5px;
      margin-top:4px;
      padding-top:8px;
      border-top:1px solid rgba(17,24,39,.06);
    }

    .fade-in{
      opacity:0;
      transform: translateY(10px);
      animation: rise .55s ease forwards;
    }
    @keyframes rise{
      to{opacity:1; transform: translateY(0)}
    }
    @media (prefers-reduced-motion: reduce){
      .fade-in{animation:none; opacity:1; transform:none}
      .card:hover, .btn:hover, .toc a:hover, .inline-a:hover, .f-a:hover{transform:none}
      .nav-link:hover{transform:none}
      details[open]{transform:none}
    }

    @media (max-width: 900px){
      .hero-inner{grid-template-columns:1fr; padding:18px}
      h1{font-size:28px}
      .nav-actions{min-width:auto}
      .menu-btn{display:inline-flex}
      .menu{display:none}
      .mobile-panel{display:block}
      .nav-wrap{padding:10px 0}
    }
    @media (max-width: 520px){
      .container{padding:0 14px}
      .hero-inner{padding:16px}
      .section-inner{padding:14px}
      h1{font-size:24px}
      .cta{padding:10px 12px}
    }