:root{
      --bg:#f6f7fb;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#5b6777;
      --border:rgba(15,23,42,.10);
      --shadow: 0 10px 30px rgba(15,23,42,.06);
      --accent:#1f6feb;
      --accent2:#7c3aed;
      --ring: rgba(31,111,235,.25);
      --ok:#0f766e;
      --warn:#b45309;
    }
    *{box-sizing:border-box}
    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;
      background: radial-gradient(900px 500px at 20% -10%, rgba(124,58,237,.10), transparent 55%),
                  radial-gradient(700px 400px at 90% 0%, rgba(31,111,235,.10), transparent 55%),
                  linear-gradient(#fbfcff, var(--bg));
      color:var(--text);
      line-height:1.6;
    }
    a{color:inherit}
    .container{
      width:100%;
      max-width: 1060px;
      margin:0 auto;
      padding: 0 18px;
    }
    header{
      position:sticky;
      top:0;
      z-index:20;
      backdrop-filter: blur(10px);
      background: rgba(246,247,251,.72);
      border-bottom: 1px solid rgba(15,23,42,.07);
    }
    .nav-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding: 14px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width: 180px;
    }
    .logo{
      width:36px;height:36px;border-radius:12px;
      background: linear-gradient(135deg, rgba(31,111,235,.95), rgba(124,58,237,.95));
      box-shadow: 0 10px 24px rgba(31,111,235,.18);
      display:flex;align-items:center;justify-content:center;
      color:#fff;font-weight:800;
      letter-spacing:-.5px;
      user-select:none;
    }
    .brand-title{
      display:flex;flex-direction:column;gap:2px;
    }
    .brand-title strong{
      font-size:14px;
      letter-spacing:.2px;
    }
    .brand-title span{
      font-size:12px;
      color:var(--muted);
    }
    nav{
      display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end;
    }
    .nav-links{
      display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end;
    }
    .nav-links a{
      text-decoration:none;
      font-size:13px;
      color: var(--muted);
      padding: 8px 10px;
      border-radius: 12px;
      border: 1px solid transparent;
      transition: background .2s ease, border-color .2s ease, transform .2s ease;
      white-space:nowrap;
    }
    .nav-links a:hover{
      background: rgba(31,111,235,.06);
      border-color: rgba(31,111,235,.12);
      color:#1d4ed8;
      transform: translateY(-1px);
    }
    .cta{
      display:flex;align-items:center;gap:10px;
    }
    .btn{
      appearance:none;
      border:none;
      border-radius: 14px;
      padding: 10px 14px;
      font-weight:700;
      font-size:13px;
      cursor:pointer;
      transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
      text-decoration:none;
      display:inline-flex;
      align-items:center;
      gap:10px;
      user-select:none;
    }
    .btn-primary{
      background: linear-gradient(135deg, rgba(31,111,235,.98), rgba(124,58,237,.92));
      color:#fff;
      box-shadow: 0 14px 30px rgba(31,111,235,.18);
    }
    .btn-primary:hover{transform: translateY(-1px); box-shadow: 0 18px 38px rgba(31,111,235,.22);}
    .btn-ghost{
      background: rgba(255,255,255,.7);
      border: 1px solid rgba(15,23,42,.10);
      color:#1f2937;
    }
    .btn-ghost:hover{transform: translateY(-1px); border-color: rgba(31,111,235,.18); box-shadow: 0 10px 26px rgba(15,23,42,.07);}
    .hero{
      padding: 28px 0 18px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 16px;
      align-items:stretch;
    }
    .hero-card{
      background: linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.75));
      border: 1px solid rgba(15,23,42,.09);
      border-radius: 20px;
      box-shadow: var(--shadow);
      padding: 22px;
      position:relative;
      overflow:hidden;
    }
    .hero-card:before{
      content:"";
      position:absolute;
      inset:-2px;
      background: radial-gradient(600px 240px at 20% 0%, rgba(31,111,235,.18), transparent 55%),
                  radial-gradient(460px 220px at 85% 30%, rgba(124,58,237,.14), transparent 55%);
      pointer-events:none;
      opacity:.95;
    }
    .hero-card > *{position:relative; z-index:1}
    h1{
      margin:0;
      font-size: 28px;
      line-height:1.25;
      letter-spacing:-.6px;
    }
    .sub{
      margin-top:10px;
      color:var(--muted);
      font-size:14px;
      max-width: 56ch;
    }
    .hero-actions{
      margin-top: 16px;
      display:flex;
      flex-wrap:wrap;
      gap: 10px;
      align-items:center;
    }
    .pill-row{
      margin-top: 16px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .pill{
      border-radius: 999px;
      padding: 9px 12px;
      font-size: 13px;
      color:#243244;
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.7);
      display:inline-flex;
      align-items:center;
      gap:10px;
    }
    .dot{
      width:10px;height:10px;border-radius:50%;
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      box-shadow: 0 10px 18px rgba(31,111,235,.15);
    }
    .side-card{
      background: rgba(255,255,255,.82);
      border: 1px solid rgba(15,23,42,.09);
      border-radius: 20px;
      box-shadow: 0 10px 28px rgba(15,23,42,.05);
      padding: 18px;
      display:flex;
      flex-direction:column;
      gap: 12px;
      overflow:hidden;
      position:relative;
    }
    .side-card:after{
      content:"";
      position:absolute;
      right:-60px; top:-60px;
      width: 160px; height:160px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, rgba(31,111,235,.25), transparent 60%);
      pointer-events:none;
    }
    .side-card > *{position:relative; z-index:1}
    .side-title{
      display:flex;align-items:flex-start;gap:12px;
    }
    .badge{
      width:38px;height:38px;border-radius: 14px;
      background: rgba(31,111,235,.10);
      border: 1px solid rgba(31,111,235,.18);
      display:flex;align-items:center;justify-content:center;
      color:#1d4ed8;
      flex:0 0 auto;
      font-weight:800;
    }
    .side-title strong{font-size:14px}
    .side-title span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .quick-steps{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .quick-steps li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding: 10px 10px;
      border-radius: 16px;
      border: 1px solid rgba(15,23,42,.08);
      background: rgba(255,255,255,.65);
      transition: transform .16s ease, border-color .16s ease, background .16s ease;
    }
    .quick-steps li:hover{
      transform: translateY(-1px);
      border-color: rgba(31,111,235,.18);
      background: rgba(255,255,255,.85);
    }
    .step-num{
      width:26px;height:26px;border-radius: 10px;
      background: rgba(31,111,235,.12);
      border: 1px solid rgba(31,111,235,.18);
      display:flex;align-items:center;justify-content:center;
      font-size:12px;font-weight:800;color:#1d4ed8;
      flex:0 0 auto;
      margin-top:2px;
    }
    .quick-steps b{font-size:13px}
    .quick-steps p{margin:4px 0 0; color:var(--muted); font-size:13px}
    main{padding: 12px 0 26px}
    .section{
      margin-top: 14px;
    }
    .grid-2{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .block-title{
      display:flex;align-items:center;justify-content:space-between;gap:10px;
      margin-bottom: 10px;
    }
    .block-title h2{
      margin:0;
      font-size: 16px;
      letter-spacing:-.2px;
    }
    .hint{
      font-size:12px;color:var(--muted);
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.7);
      padding: 7px 10px;
      border-radius: 999px;
      white-space:nowrap;
    }
    .card{
      background: rgba(255,255,255,.86);
      border: 1px solid rgba(15,23,42,.09);
      border-radius: 18px;
      padding: 16px;
      box-shadow: 0 10px 24px rgba(15,23,42,.04);
    }
    .list{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap: 12px;
    }
    .item{
      display:flex;
      gap: 12px;
      align-items:flex-start;
      padding: 12px;
      border-radius: 16px;
      border: 1px solid rgba(15,23,42,.08);
      background: rgba(255,255,255,.65);
    }
    .icon{
      width:34px;height:34px;border-radius: 14px;
      display:flex;align-items:center;justify-content:center;
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(31,111,235,.08);
      color:#1d4ed8;
      flex:0 0 auto;
      font-weight:900;
    }
    .item h3{
      margin:0;
      font-size:14px;
      letter-spacing:-.2px;
    }
    .item p{
      margin:6px 0 0;
      color:var(--muted);
      font-size:13px;
    }
    .callout{
      border-radius: 18px;
      padding: 16px;
      border: 1px solid rgba(15,23,42,.10);
      background: linear-gradient(180deg, rgba(31,111,235,.08), rgba(255,255,255,.70));
      display:flex;
      gap: 12px;
      align-items:flex-start;
    }
    .callout .mark{
      width:38px;height:38px;border-radius: 16px;
      display:flex;align-items:center;justify-content:center;
      background: rgba(124,58,237,.10);
      border: 1px solid rgba(124,58,237,.18);
      color:#6d28d9;
      font-weight:900;
      flex:0 0 auto;
    }
    .callout strong{
      display:block;
      font-size:14px;
      margin-top:2px;
    }
    .callout span{
      display:block;
      color:var(--muted);
      font-size:13px;
      margin-top:6px;
    }
    .divider{
      height:1px;
      background: rgba(15,23,42,.10);
      margin: 16px 0;
    }
    details{
      border-radius: 18px;
      border: 1px solid rgba(15,23,42,.09);
      background: rgba(255,255,255,.82);
      padding: 12px 14px;
      box-shadow: 0 10px 24px rgba(15,23,42,.03);
      transition: transform .15s ease, border-color .15s ease;
    }
    details[open]{
      border-color: rgba(31,111,235,.20);
      transform: translateY(-1px);
    }
    summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap: 12px;
      font-weight:800;
      font-size:14px;
      letter-spacing:-.2px;
      color:#1f2937;
    }
    summary::-webkit-details-marker{display:none}
    .chev{
      width:22px;height:22px;border-radius: 10px;
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.65);
      display:flex;align-items:center;justify-content:center;
      flex:0 0 auto;
      color: var(--muted);
      transition: transform .18s ease;
      margin-top:1px;
    }
    details[open] .chev{transform: rotate(180deg)}
    details .answer{
      margin-top:10px;
      color:var(--muted);
      font-size:13px;
    }
    .faq-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .form-card{
      padding: 16px;
      border-radius: 18px;
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.86);
      box-shadow: 0 10px 24px rgba(15,23,42,.04);
      overflow:hidden;
      position:relative;
    }
    .form-card:before{
      content:"";
      position:absolute;
      inset:-2px;
      background: radial-gradient(520px 200px at 20% 0%, rgba(31,111,235,.12), transparent 60%),
                  radial-gradient(420px 220px at 100% 20%, rgba(124,58,237,.10), transparent 60%);
      pointer-events:none;
    }
    .form-card > *{position:relative; z-index:1}
    .form-top{
      display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap;
      margin-bottom: 10px;
    }
    .form-top h2{margin:0;font-size:16px;letter-spacing:-.2px}
    .form-top p{margin:6px 0 0;color:var(--muted);font-size:13px;max-width: 60ch}
    form{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-top: 12px;
    }
    .field{
      display:flex;flex-direction:column;gap:7px;
    }
    .field.wide{grid-column: 1 / -1}
    label{
      font-size:12px;
      color: var(--muted);
      font-weight:700;
    }
    input, textarea{
      width:100%;
      border-radius: 14px;
      border: 1px solid rgba(15,23,42,.12);
      background: rgba(255,255,255,.9);
      padding: 11px 12px;
      font-size:14px;
      color: var(--text);
      outline: none;
      transition: box-shadow .15s ease, border-color .15s ease, transform .15s ease;
    }
    textarea{min-height: 96px; resize: vertical}
    input:focus, textarea:focus{
      border-color: rgba(31,111,235,.35);
      box-shadow: 0 0 0 4px var(--ring);
    }
    .form-actions{
      grid-column: 1 / -1;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap: 12px;
      margin-top: 2px;
      flex-wrap:wrap;
    }
    .fineprint{
      color: var(--muted);
      font-size:12px;
      margin:0;
      max-width: 56ch;
    }
    .submit-row{
      display:flex;align-items:center;gap:10px;
    }
    .btn-submit{
      background: linear-gradient(135deg, rgba(31,111,235,.98), rgba(124,58,237,.92));
      color:#fff;
      border: 0;
      border-radius: 14px;
      padding: 12px 16px;
      font-weight:900;
      font-size:14px;
      cursor:pointer;
      box-shadow: 0 14px 30px rgba(31,111,235,.18);
      transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
      display:inline-flex;
      align-items:center;
      gap:10px;
      user-select:none;
    }
    .btn-submit:hover{transform: translateY(-1px); box-shadow: 0 18px 38px rgba(31,111,235,.22);}
    .btn-submit:disabled{opacity:.65; cursor:not-allowed; transform:none; box-shadow:none}
    .status{
      font-size:12px;
      color: var(--muted);
      min-height: 18px;
    }
    .status.ok{color: var(--ok); font-weight:800}
    .status.err{color: #b91c1c; font-weight:800}
    footer{
      background: #eef1f7;
      border-top: 1px solid rgba(15,23,42,.08);
      padding: 16px 0 22px;
      margin-top: 8px;
    }
    .footer-inner{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap: 14px;
      flex-wrap:wrap;
    }
    .foot-left{
      min-width: 240px;
      display:flex;flex-direction:column;gap:8px;
    }
    .foot-left strong{font-size:14px}
    .foot-left span{color:var(--muted); font-size:12px}
    .foot-links{
      display:flex;flex-wrap:wrap; gap: 10px;
      align-items:center;
      justify-content:flex-end;
    }
    .foot-links a{
      text-decoration:none;
      font-size:12px;
      color: var(--muted);
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.65);
      padding: 8px 10px;
      border-radius: 999px;
      transition: transform .15s ease, border-color .15s ease;
      white-space:nowrap;
    }
    .foot-links a:hover{transform: translateY(-1px); border-color: rgba(31,111,235,.18); color:#1d4ed8}
    @media (max-width: 900px){
      .hero-grid{grid-template-columns:1fr; }
      .faq-grid{grid-template-columns:1fr}
      .grid-2{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .nav-links{display:none}
    }