:root{
      --bg1:#fbf7f1;
      --bg2:#ffffff;
      --text:#1f2937;
      --muted:#5b6776;
      --card:#ffffff;
      --border:rgba(17,24,39,.10);
      --shadow:0 10px 30px rgba(17,24,39,.08);
      --brand1:#0f766e;
      --brand2:#2563eb;
      --ring:rgba(37,99,235,.20);
      --radius:16px;
    }
    *{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",sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 600px at 15% -10%, rgba(37,99,235,.10), transparent 55%),
        radial-gradient(900px 520px at 90% 10%, rgba(15,118,110,.12), transparent 55%),
        linear-gradient(180deg, var(--bg1), var(--bg2) 55%);
    }
    a{color:inherit}
    .container{
      width:100%;
      max-width:1040px;
      margin:0 auto;
      padding:0 18px;
    }

    header{
      position:sticky;
      top:0;
      z-index:10;
      background:rgba(251,247,241,.72);
      backdrop-filter:saturate(160%) blur(10px);
      border-bottom:1px solid rgba(17,24,39,.06);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:14px 0;
      gap:14px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
    }
    .logo{
      width:38px;height:38px;border-radius:12px;
      background:linear-gradient(135deg, rgba(37,99,235,.95), rgba(15,118,110,.95));
      box-shadow:0 10px 25px rgba(37,99,235,.18);
      position:relative;
      overflow:hidden;
    }
    .logo:after{
      content:"";
      position:absolute; inset:-30%;
      background:linear-gradient(90deg, rgba(255,255,255,.0), rgba(255,255,255,.35), rgba(255,255,255,.0));
      transform:rotate(20deg);
      animation:shine 6s ease-in-out infinite;
    }
    @keyframes shine{
      0%,45%{transform:translateX(-30%) rotate(20deg); opacity:.0}
      55%{opacity:.9}
      85%{transform:translateX(35%) rotate(20deg); opacity:.0}
      100%{opacity:.0}
    }
    .brand-title{
      display:flex;
      flex-direction:column;
      line-height:1.05;
      min-width:0;
    }
    .brand-title strong{
      font-size:14px;
      letter-spacing:.2px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-title span{
      font-size:12px;
      color:var(--muted);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .nav-actions{
      display:flex; align-items:center; gap:10px;
    }
    .nav-links{
      display:none;
      gap:18px;
      align-items:center;
      padding:0;
      margin:0;
      list-style:none;
    }
    .nav-links a{
      text-decoration:none;
      font-size:13px;
      color:var(--muted);
      transition:color .2s ease;
      white-space:nowrap;
    }
    .nav-links a:hover{color:var(--text)}
    .btn{
      appearance:none;
      border:1px solid rgba(17,24,39,.14);
      background:#fff;
      color:var(--text);
      border-radius:12px;
      padding:10px 14px;
      font-weight:650;
      font-size:13px;
      cursor:pointer;
      transition:transform .08s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
      display:inline-flex;
      align-items:center;
      gap:8px;
      box-shadow:0 6px 18px rgba(17,24,39,.06);
      user-select:none;
    }
    .btn:active{transform:translateY(1px)}
    .btn:focus{outline:none; box-shadow:0 0 0 4px var(--ring), 0 6px 18px rgba(17,24,39,.06)}
    .btn-primary{
      border-color:rgba(37,99,235,.25);
      background:linear-gradient(180deg, rgba(37,99,235,.12), rgba(37,99,235,.05));
    }
    .btn-ghost{
      background:transparent;
      box-shadow:none;
    }

    main{padding:26px 0 0}
    .hero{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:stretch;
      padding:18px 0 10px;
    }
    .hero-card{
      background:linear-gradient(180deg, rgba(255,255,255,.86), rgba(255,255,255,.70));
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      padding:22px 20px;
      position:relative;
      overflow:hidden;
      min-height:280px;
    }
    .hero-card:before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(600px 260px at 18% 0%, rgba(37,99,235,.18), transparent 55%),
        radial-gradient(520px 250px at 90% 15%, rgba(15,118,110,.16), transparent 55%);
      pointer-events:none;
      opacity:.95;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:flex;
      flex-direction:column;
      height:100%;
    }
    .kicker{
      display:flex; align-items:center; gap:10px;
      color:var(--muted);
      font-size:13px;
      margin-bottom:10px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 10px;
      border-radius:999px;
      border:1px solid rgba(17,24,39,.10);
      background:rgba(255,255,255,.66);
      box-shadow:0 8px 20px rgba(17,24,39,.06);
      max-width:100%;
    }
    .dot{
      width:9px;height:9px;border-radius:50%;
      background:linear-gradient(135deg, var(--brand2), var(--brand1));
      box-shadow:0 0 0 4px rgba(37,99,235,.12);
      flex:0 0 auto;
    }
    h1{
      margin:0;
      font-size:28px;
      line-height:1.25;
      letter-spacing:-.3px;
    }
    .lead{
      margin:12px 0 0;
      color:var(--muted);
      font-size:14.5px;
      line-height:1.7;
      max-width:62ch;
    }
    .hero-cta{
      margin-top:auto;
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      padding-top:16px;
    }
    .micro{
      font-size:12px;
      color:var(--muted);
      margin-top:10px;
      line-height:1.6;
    }

    .side-panel{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      box-shadow:0 10px 25px rgba(17,24,39,.06);
      padding:16px;
      display:flex;
      flex-direction:column;
      gap:12px;
      min-height:280px;
    }
    .side-title{
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
    }
    .side-title h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .badge{
      font-size:12px;
      color:#0f3a3a;
      background:rgba(15,118,110,.10);
      border:1px solid rgba(15,118,110,.22);
      padding:7px 10px;
      border-radius:999px;
      white-space:nowrap;
    }
    .steps{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .step{
      display:flex; gap:10px; align-items:flex-start;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.08);
      background:rgba(255,255,255,.7);
      transition:transform .12s ease, border-color .2s ease;
    }
    .step:hover{
      transform:translateY(-1px);
      border-color:rgba(37,99,235,.22);
    }
    .num{
      width:26px;height:26px;border-radius:10px;
      display:flex;align-items:center;justify-content:center;
      background:linear-gradient(180deg, rgba(37,99,235,.18), rgba(37,99,235,.08));
      border:1px solid rgba(37,99,235,.25);
      color:#0b3a82;
      font-weight:800;
      flex:0 0 auto;
      font-size:12px;
      margin-top:1px;
    }
    .step b{display:block; font-size:13.5px}
    .step p{margin:4px 0 0; color:var(--muted); font-size:12.8px; line-height:1.6}

    section{padding:10px 0}
    .grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
      align-items:start;
    }
    .card{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      box-shadow:0 10px 24px rgba(17,24,39,.05);
      padding:18px 16px;
      overflow:hidden;
      position:relative;
    }
    .card h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .card p{
      margin:10px 0 0;
      color:var(--muted);
      line-height:1.75;
      font-size:14px;
    }
    .divider{
      height:1px;
      background:rgba(17,24,39,.08);
      margin:14px 0;
    }
    .checklist{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .check{
      display:flex; gap:10px; align-items:flex-start;
    }
    .check svg{margin-top:2px; flex:0 0 auto}
    .check b{font-size:13.5px}
    .check span{
      display:block;
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
      margin-top:4px;
    }

    .faq-card{padding:16px 16px}
    .faq-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap:10px;
      margin-bottom:10px;
    }
    .faq-head h2{margin:0; font-size:16px}
    .faq-head .hint{
      color:var(--muted);
      font-size:12.5px;
      line-height:1.4;
      text-align:right;
    }

    details{
      border:1px solid rgba(17,24,39,.08);
      background:rgba(255,255,255,.72);
      border-radius:14px;
      padding:12px 12px;
      margin-top:10px;
      transition:border-color .2s ease, transform .12s ease;
    }
    details[open]{border-color:rgba(37,99,235,.25)}
    details summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      font-weight:750;
      font-size:14px;
    }
    details summary::-webkit-details-marker{display:none}
    .chev{
      width:28px;height:28px;border-radius:10px;
      border:1px solid rgba(17,24,39,.10);
      background:rgba(255,255,255,.7);
      display:flex;align-items:center;justify-content:center;
      transition:transform .18s ease;
      flex:0 0 auto;
    }
    details[open] .chev{transform:rotate(180deg)}
    details .faq-body{
      margin-top:10px;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
    }

    footer{
      margin-top:10px;
      background:linear-gradient(180deg, rgba(255,255,255,.65), rgba(255,255,255,.88));
      border-top:1px solid rgba(17,24,39,.07);
    }
    .footer-wrap{
      padding:18px 0 22px;
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .footer-top{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .footer-top .col{
      flex:1 1 260px;
      min-width:0;
    }
    .fine{
      color:var(--muted);
      font-size:12.8px;
      line-height:1.7;
      margin:8px 0 0;
    }
    .related{
      margin-top:2px;
      padding:16px 16px;
      background:rgba(255,255,255,.78);
      border:1px solid rgba(17,24,39,.08);
      border-radius:var(--radius);
      box-shadow:0 10px 22px rgba(17,24,39,.05);
    }
    .related h2{
      margin:0 0 10px;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .related-grid{
      display:grid;
      grid-template-columns:repeat(3, 1fr);
      gap:10px;
    }
    .rel-item a{
      display:flex; flex-direction:column;
      gap:6px;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.08);
      background:rgba(255,255,255,.72);
      text-decoration:none;
      transition:transform .12s ease, border-color .2s ease;
      min-height:62px;
    }
    .rel-item a:hover{
      transform:translateY(-1px);
      border-color:rgba(15,118,110,.25);
    }
    .rel-item b{
      font-size:13.2px;
      letter-spacing:-.1px;
      line-height:1.35;
    }
    .rel-item em{
      font-style:normal;
      color:var(--muted);
      font-size:12.2px;
      line-height:1.3;
    }

    .copyright{
      color:var(--muted);
      font-size:12.5px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      flex-wrap:wrap;
      padding-top:4px;
    }
    .toplink{
      text-decoration:none;
      color:var(--muted);
      font-size:12.5px;
      padding:8px 10px;
      border-radius:12px;
      border:1px solid rgba(17,24,39,.08);
      background:rgba(255,255,255,.72);
      transition:border-color .2s ease, color .2s ease, transform .12s ease;
      display:inline-flex;
      align-items:center;
      gap:8px;
    }
    .toplink:hover{border-color:rgba(37,99,235,.22); color:var(--text); transform:translateY(-1px)}
    .visually-hidden{
      position:absolute!important;
      width:1px;height:1px;
      padding:0;margin:-1px;
      overflow:hidden;clip:rect(0,0,0,0);
      white-space:nowrap;border:0;
    }

    .fade-in{
      animation:fadeUp .55s ease both;
    }
    @keyframes fadeUp{
      from{opacity:0; transform:translateY(8px)}
      to{opacity:1; transform:translateY(0)}
    }

    @media (max-width: 900px){
      .hero{grid-template-columns:1fr; gap:14px}
      .side-panel{min-height:auto}
      .grid{grid-template-columns:1fr}
      .related-grid{grid-template-columns:repeat(2, 1fr)}
      .nav-links{display:none}
    }
    @media (min-width: 901px){
      .nav-links{display:flex}
    }