:root{
      --bg0:#fbfaf7;
      --bg1:#f3f5f7;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#5b6777;
      --line:#e6e7ea;
      --brand:#1f6feb;
      --brand2:#0b5bd3;
      --warn:#b45309;
      --ok:#067647;
      --shadow: 0 10px 30px rgba(17,24,39,.08);
      --shadow2: 0 6px 18px rgba(17,24,39,.08);
      --r12: 12px;
      --r16: 16px;
      --r20: 20px;
      --container: 1120px;
    }
    *{box-sizing:border-box}
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(800px 420px at 15% 5%, rgba(31,111,235,.10), transparent 60%),
        radial-gradient(700px 360px at 85% 0%, rgba(11,91,211,.10), transparent 55%),
        linear-gradient(180deg, var(--bg0), var(--bg1) 55%, #ffffff 100%);
      line-height:1.6;
      overflow-x:hidden;
    }
    a{color:inherit}
    .container{
      width:100%;
      max-width:var(--container);
      margin:0 auto;
      padding:0 18px;
    }
    header{
      position:sticky;
      top:0;
      z-index:30;
      backdrop-filter:saturate(140%) blur(10px);
      background:rgba(251,250,247,.72);
      border-bottom:1px solid rgba(230,231,234,.75);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:12px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:160px;
    }
    .logo{
      width:36px;
      height:36px;
      border-radius:12px;
      background:
        radial-gradient(18px 18px at 30% 30%, rgba(255,255,255,.85), rgba(255,255,255,0) 60%),
        linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 10px 25px rgba(31,111,235,.25);
      flex:0 0 auto;
      position:relative;
      overflow:hidden;
    }
    .logo::after{
      content:"";
      position:absolute;
      inset:-30% -50% auto auto;
      width:60px;height:60px;
      background:rgba(255,255,255,.35);
      transform:rotate(25deg);
      filter: blur(1px);
      animation:sheen 3.6s ease-in-out infinite;
    }
    @keyframes sheen{
      0%,55%{transform:translateX(0) rotate(25deg); opacity:.0}
      65%{opacity:.55}
      100%{transform:translateX(-80px) rotate(25deg); opacity:0}
    }
    .brand-title{
      display:flex;
      flex-direction:column;
      line-height:1.15;
    }
    .brand-title strong{
      font-size:14px;
      letter-spacing:.2px;
    }
    .brand-title span{
      font-size:12px;
      color:var(--muted);
    }
    nav .menu{
      display:flex;
      gap:18px;
      align-items:center;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .menu 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;
      outline: none;
    }
    .menu a:hover{
      background:rgba(31,111,235,.08);
      color:#1f3a63;
      transform:translateY(-1px);
    }
    .cta{
      display:flex;
      gap:10px;
      align-items:center;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      padding:10px 14px;
      border-radius:14px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.7);
      color:#111827;
      text-decoration:none;
      font-size:14px;
      transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
      user-select:none;
      white-space:nowrap;
    }
    .btn:hover{
      transform:translateY(-1px);
      box-shadow:var(--shadow2);
      border-color:rgba(31,111,235,.25);
    }
    .btn-primary{
      border-color:rgba(31,111,235,.35);
      background: linear-gradient(180deg, rgba(31,111,235,.10), rgba(31,111,235,.03));
    }
    .btn-solid{
      border-color:transparent;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      color:#fff;
      box-shadow: 0 14px 26px rgba(31,111,235,.22);
    }
    .btn-solid:hover{
      box-shadow: 0 18px 34px rgba(31,111,235,.28);
      border-color:transparent;
    }
    .icon{
      width:18px;height:18px;
      display:inline-block;
    }

    .hero{
      padding:26px 0 10px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-card{
      border:1px solid rgba(230,231,234,.9);
      background: linear-gradient(180deg, rgba(255,255,255,.9), rgba(255,255,255,.76));
      border-radius:var(--r20);
      box-shadow: var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-card::before{
      content:"";
      position:absolute;
      inset:-2px auto auto -2px;
      width:260px;height:260px;
      background: radial-gradient(circle at 30% 30%, rgba(31,111,235,.18), rgba(31,111,235,0) 62%);
      pointer-events:none;
      transform:translateZ(0);
    }
    .hero-inner{
      padding:24px;
      display:flex;
      flex-direction:column;
      gap:14px;
      height:100%;
      position:relative;
    }
    .kicker{
      display:flex;
      gap:10px;
      align-items:center;
      flex-wrap:wrap;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(31,111,235,.20);
      background: rgba(31,111,235,.06);
      color:#16406d;
      font-size:13px;
      white-space:nowrap;
    }
    .dot{
      width:8px;height:8px;border-radius:50%;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 0 0 4px rgba(31,111,235,.14);
    }
    h1{
      margin:0;
      font-size:34px;
      letter-spacing:-.6px;
      line-height:1.15;
    }
    .sub{
      margin:0;
      color:var(--muted);
      font-size:15px;
      max-width:62ch;
    }
    .hero-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      align-items:center;
      margin-top:4px;
    }
    .mini-grid{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
    }
    .side-card{
      border:1px solid rgba(230,231,234,.9);
      background: rgba(255,255,255,.78);
      border-radius:var(--r20);
      box-shadow: 0 10px 24px rgba(17,24,39,.06);
      padding:18px;
      display:flex;
      flex-direction:column;
      gap:10px;
      position:relative;
      overflow:hidden;
    }
    .side-card::after{
      content:"";
      position:absolute;
      inset:auto -60px -80px auto;
      width:220px;height:220px;
      background: radial-gradient(circle at 40% 40%, rgba(180,83,9,.14), rgba(180,83,9,0) 60%);
      pointer-events:none;
    }
    .side-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
    }
    .side-title h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(180,83,9,.25);
      background: rgba(180,83,9,.07);
      color:#7c2d12;
      font-size:12px;
      white-space:nowrap;
    }
    .steps{
      display:flex;
      flex-direction:column;
      gap:10px;
      position:relative;
      z-index:1;
    }
    .step{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:10px 12px;
      border-radius:16px;
      border:1px solid rgba(230,231,234,.9);
      background: rgba(255,255,255,.62);
      transition: transform .15s ease, box-shadow .15s ease;
    }
    .step:hover{
      transform:translateY(-2px);
      box-shadow:0 14px 26px rgba(17,24,39,.08);
    }
    .num{
      width:26px;height:26px;
      border-radius:10px;
      background: rgba(31,111,235,.10);
      border:1px solid rgba(31,111,235,.22);
      display:flex;align-items:center;justify-content:center;
      color:#15406c;
      font-weight:700;
      font-size:13px;
      flex:0 0 auto;
    }
    .step b{
      display:block;
      font-size:14px;
      margin-bottom:2px;
    }
    .step span{
      display:block;
      color:var(--muted);
      font-size:13px;
    }

    main{
      padding:14px 0 28px;
    }
    .section{
      margin-top:14px;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:14px;
      margin-bottom:12px;
    }
    .section-head h2{
      margin:0;
      font-size:20px;
      letter-spacing:-.3px;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      max-width:48ch;
    }

    .grid-3{
      display:grid;
      grid-template-columns: repeat(3, 1fr);
      gap:12px;
    }
    .card{
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.8);
      border-radius:var(--r20);
      padding:16px;
      box-shadow: 0 10px 22px rgba(17,24,39,.05);
      transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
      position:relative;
      overflow:hidden;
    }
    .card:hover{
      transform:translateY(-2px);
      box-shadow: 0 18px 34px rgba(17,24,39,.10);
      border-color: rgba(31,111,235,.22);
    }
    .card h3{
      margin:0 0 8px 0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .card .tag{
      display:inline-flex;
      margin-top:12px;
      padding:7px 10px;
      border-radius:999px;
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.6);
      color:#3b4a5c;
      font-size:12px;
      gap:8px;
      align-items:center;
      white-space:nowrap;
    }
    .spark{
      width:10px;height:10px;border-radius:3px;
      background: linear-gradient(135deg, rgba(31,111,235,.85), rgba(11,91,211,.85));
      box-shadow: 0 0 0 4px rgba(31,111,235,.12);
    }

    .compare{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:12px;
      align-items:stretch;
    }
    .panel{
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.8);
      border-radius:var(--r20);
      padding:16px;
      box-shadow: 0 10px 22px rgba(17,24,39,.05);
      position:relative;
      overflow:hidden;
    }
    .panel h3{
      margin:0 0 10px 0;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .panel ul{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:10px 12px;
      border-radius:16px;
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.62);
    }
    .li i{
      width:20px;height:20px;
      border-radius:8px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-style:normal;
      flex:0 0 auto;
      margin-top:1px;
      color:#fff;
      background: rgba(31,111,235,.85);
    }
    .li b{display:block;font-size:14px;margin-bottom:2px}
    .li span{display:block;color:var(--muted);font-size:13px}
    .panel.neg .li i{background: rgba(180,83,9,.95)}
    .panel::after{
      content:"";
      position:absolute;
      inset:auto -120px -140px auto;
      width:340px;height:340px;
      background: radial-gradient(circle at 30% 30%, rgba(31,111,235,.12), rgba(31,111,235,0) 62%);
      pointer-events:none;
    }
    .panel.neg::after{
      background: radial-gradient(circle at 30% 30%, rgba(180,83,9,.12), rgba(180,83,9,0) 62%);
    }

    .faq{
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.82);
      border-radius:var(--r20);
      box-shadow: 0 10px 22px rgba(17,24,39,.05);
      padding:8px;
      overflow:hidden;
    }
    details{
      border-top:1px solid rgba(230,231,234,.95);
      padding:12px 12px;
      border-radius:0;
      background: transparent;
    }
    details:first-child{border-top:none}
    summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:4px 6px;
      outline:none;
    }
    summary::-webkit-details-marker{display:none}
    .q{
      font-size:15px;
      font-weight:700;
      letter-spacing:-.2px;
    }
    .chev{
      width:30px;height:30px;
      border-radius:12px;
      border:1px solid rgba(230,231,234,.95);
      display:flex;align-items:center;justify-content:center;
      background: rgba(255,255,255,.65);
      transition: transform .2s ease, border-color .2s ease;
      flex:0 0 auto;
    }
    details[open] .chev{
      transform: rotate(180deg);
      border-color: rgba(31,111,235,.25);
    }
    .a{
      color:var(--muted);
      font-size:14px;
      padding:10px 6px 6px;
      max-width:78ch;
    }

    .form-area{
      border:1px solid rgba(230,231,234,.95);
      background: linear-gradient(180deg, rgba(255,255,255,.85), rgba(255,255,255,.72));
      border-radius:var(--r20);
      box-shadow: 0 10px 24px rgba(17,24,39,.06);
      padding:16px;
      overflow:hidden;
      position:relative;
    }
    .form-area::before{
      content:"";
      position:absolute;
      inset:-2px auto auto -2px;
      width:260px;height:260px;
      background: radial-gradient(circle at 30% 30%, rgba(31,111,235,.15), rgba(31,111,235,0) 62%);
      pointer-events:none;
    }
    .form-wrap{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns: 1.05fr .95fr;
      gap:14px;
      align-items:start;
    }
    .form-copy h2{
      margin:0 0 8px 0;
      font-size:20px;
      letter-spacing:-.3px;
    }
    .form-copy p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    form{
      display:flex;
      flex-direction:column;
      gap:10px;
      align-items:stretch;
    }
    .field-row{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:10px;
    }
    label{
      display:flex;
      flex-direction:column;
      gap:7px;
      font-size:13px;
      color:#334155;
    }
    input, select{
      appearance:none;
      width:100%;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(230,231,234,.98);
      background: rgba(255,255,255,.82);
      color:var(--text);
      outline:none;
      font-size:14px;
      transition: border-color .18s ease, box-shadow .18s ease;
    }
    textarea{
      width:100%;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(230,231,234,.98);
      background: rgba(255,255,255,.82);
      color:var(--text);
      outline:none;
      font-size:14px;
      resize:vertical;
      min-height:100px;
      transition: border-color .18s ease, box-shadow .18s ease;
    }
    input:focus, select:focus, textarea:focus{
      border-color: rgba(31,111,235,.45);
      box-shadow: 0 0 0 4px rgba(31,111,235,.12);
    }
    .form-actions{
      display:flex;
      gap:10px;
      align-items:center;
      justify-content:flex-end;
      flex-wrap:wrap;
      margin-top:2px;
    }
    .hint{
      font-size:12px;
      color:var(--muted);
      line-height:1.35;
      margin-right:auto;
      max-width:42ch;
    }
    .status{
      font-size:13px;
      color:var(--muted);
      display:none;
      align-items:center;
      gap:10px;
      padding:10px 12px;
      border-radius:16px;
      border:1px solid rgba(230,231,234,.95);
      background: rgba(255,255,255,.65);
    }
    .status.show{display:flex}
    .status.ok{border-color: rgba(6,118,71,.25); color:#0f5132; background: rgba(6,118,71,.06)}
    .status.err{border-color: rgba(180,83,9,.25); color:#7c2d12; background: rgba(180,83,9,.06)}
    .spinner{
      width:18px;height:18px;border-radius:50%;
      border:2px solid rgba(31,111,235,.25);
      border-top-color: rgba(31,111,235,1);
      animation:spin .9s linear infinite;
    }
    @keyframes spin{to{transform:rotate(360deg)}}
    .sr-only{
      position:absolute;
      width:1px;height:1px;
      padding:0;margin:-1px;
      overflow:hidden;clip:rect(0,0,0,0);
      white-space:nowrap;border:0;
    }

    footer{
      background: #f6f7f9;
      border-top:1px solid rgba(230,231,234,.9);
      padding:18px 0 26px;
      margin-top:16px;
    }
    .foot-wrap{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
    }
    .foot-left{
      display:flex;
      flex-direction:column;
      gap:6px;
      color:#1f2937;
    }
    .foot-left strong{
      font-size:14px;
    }
    .foot-left span{
      color:var(--muted);
      font-size:13px;
      max-width:60ch;
    }
    .foot-links{
      display:flex;
      gap:14px;
      flex-wrap:wrap;
      align-items:center;
      justify-content:flex-end;
    }
    .foot-links a{
      text-decoration:none;
      color:var(--muted);
      font-size:13px;
      padding:8px 10px;
      border-radius:12px;
      border:1px solid transparent;
      transition: background .2s ease, border-color .2s ease, transform .2s ease;
    }
    .foot-links a:hover{
      background:#fff;
      border-color: rgba(230,231,234,.95);
      transform: translateY(-1px);
      color:#314155;
    }

    .to-top{
      position:fixed;
      right:16px;
      bottom:16px;
      z-index:60;
      opacity:0;
      transform: translateY(8px);
      pointer-events:none;
      transition: opacity .2s ease, transform .2s ease;
    }
    .to-top.show{
      opacity:1;
      transform: translateY(0);
      pointer-events:auto;
    }

    @media (max-width: 980px){
      .hero-grid{grid-template-columns: 1fr; }
      h1{font-size:30px}
      .grid-3{grid-template-columns: 1fr}
      .compare{grid-template-columns: 1fr}
      .form-wrap{grid-template-columns: 1fr}
      .field-row{grid-template-columns: 1fr}
      nav .menu{display:none}
    }