:root{
      --bg:#f7f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#132238;
      --muted:#5b6780;
      --line:#dce5f4;
      --primary:#2e6bff;
      --primary2:#7c4dff;
      --accent:#00c2ff;
      --shadow:0 18px 50px rgba(28,57,120,.10);
      --shadow2:0 10px 30px rgba(20,40,80,.12);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(46,107,255,.10), transparent 30%),
        radial-gradient(circle at top right, rgba(0,194,255,.10), transparent 26%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 45%, #f4f8ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(255,255,255,.82);
      border-bottom:1px solid rgba(220,229,244,.9);
    }
    .topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    nav{display:flex;align-items:center;gap:16px}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:#24344f;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:#eef4ff;color:var(--primary)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;transition:.25s;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 26px rgba(46,107,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(46,107,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:rgba(46,107,255,.35);color:var(--primary)}
    main{padding:22px 0 0}
    section{padding:24px 0}
    .hero{
      padding:28px 0 22px;
    }
    .hero-shell{
      position:relative;overflow:hidden;border:1px solid rgba(220,229,244,.9);
      background:
        linear-gradient(135deg, rgba(46,107,255,.06), rgba(124,77,255,.06)),
        linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,248,252,.92));
      border-radius:30px;box-shadow:var(--shadow);
      padding:28px;
    }
    .hero-shell::before,.hero-shell::after{
      content:"";position:absolute;border-radius:999px;pointer-events:none;
      background:radial-gradient(circle, rgba(0,194,255,.26), transparent 70%);
      filter:blur(4px);animation:float 8s ease-in-out infinite;
    }
    .hero-shell::before{width:220px;height:220px;top:-70px;right:-60px}
    .hero-shell::after{width:160px;height:160px;bottom:-40px;left:38%}
    @keyframes float{50%{transform:translateY(10px) translateX(-8px)}}
    .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:24px;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eff5ff;color:#2457d6;font-size:13px;font-weight:700}
    h1{margin:14px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.04em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px}
    .trust-row span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#334461;font-size:13px}
    .hero-card{
      background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow2)
    }
    .hero-card h2{margin:0 0 12px;font-size:18px}
    .mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{
      background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid #e4ebf7;border-radius:18px;padding:16px
    }
    .metric strong{display:block;font-size:24px;color:var(--primary);line-height:1}
    .metric span{display:block;margin-top:8px;font-size:13px;color:var(--muted);line-height:1.5}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .card{
      background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);
      box-shadow:var(--shadow2);padding:18px;transition:.25s;position:relative;overflow:hidden
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 30px rgba(20,40,80,.14)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,rgba(46,107,255,.12),rgba(0,194,255,.12));color:var(--primary);font-weight:800
    }
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#eef4ff;border:1px solid #dbe5ff;color:#27457d;font-size:13px}
    .soft-panel{background:linear-gradient(180deg,#fbfdff,#f2f7ff);border:1px solid #dde8fb;border-radius:26px;padding:20px}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px}
    .num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800}
    .compare-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf2fa;text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#21324b;font-size:14px}
    td{color:var(--muted);font-size:14px;line-height:1.7}
    tr:nth-child(even) td{background:#fcfdff}
    .badge-score{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:#eef5ff;color:#1f4cc3;font-weight:800}
    .faq{display:grid;gap:12px}
    details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px;box-shadow:var(--shadow2)
    }
    summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:#1f2e45}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px;color:var(--muted);line-height:1.8}
    .review{
      display:flex;flex-direction:column;gap:12px
    }
    .review .top{display:flex;justify-content:space-between;gap:10px;align-items:center}
    .stars{color:#ffb400;letter-spacing:1px;font-size:14px}
    .tagline{font-size:12px;color:#5f6d85;background:#eef4ff;border:1px solid #dce6f7;padding:6px 10px;border-radius:999px}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:7px}
    label{font-size:14px;font-weight:700;color:#20324b}
    input,select,textarea{
      width:100%;border:1px solid #d7e1ef;background:#fff;color:var(--text);border-radius:14px;
      padding:13px 14px;font:inherit;outline:none;transition:.2s
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(46,107,255,.6);box-shadow:0 0 0 4px rgba(46,107,255,.10)}
    textarea{min-height:128px;resize:vertical}
    .footer{
      margin-top:10px;padding:24px 0 30px;border-top:1px solid rgba(220,229,244,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.6), rgba(244,248,255,.96));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px}
    .footer a{color:#2448a8}
    .footer small{color:#61728d;line-height:1.7}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:10px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:50px;height:50px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:var(--shadow2)
    }
    .service-card{
      position:fixed;right:18px;bottom:78px;z-index:60;width:min(320px,calc(100vw - 36px));
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:14px;display:none
    }
    .service-card.open{display:block}
    .service-card .qr{display:flex;gap:12px;align-items:center}
    .service-card .qr img{width:92px;height:92px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .service-card h3{margin:0 0 8px;font-size:16px}
    .muted{color:var(--muted)}
    .subtle{font-size:13px;color:#64748b}
    .article-list{display:grid;gap:12px}
    .article-list a{
      display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 16px;border-radius:16px;
      border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)
    }
    .article-list a:hover{border-color:rgba(46,107,255,.35)}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .image-box{border-radius:22px;overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)}
    .image-box img{width:100%;height:auto;display:block}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#34495f;font-size:13px}
    .price-list{display:grid;gap:12px}
    .price-item{display:flex;justify-content:space-between;gap:14px;padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .price-item strong{display:block;color:#20324b}
    .price-item span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
    .anchor{scroll-margin-top:96px}
    .mobile-only{display:none}
    @media (max-width: 960px){
      .hero-grid,.grid-4,.grid-3,.form-grid,.footer-grid,.two-col{grid-template-columns:1fr}
      nav{display:none}
      .nav-toggle{display:inline-flex}
      nav.open{
        display:flex;flex-direction:column;align-items:stretch;gap:14px;
        position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--line);
        border-radius:20px;padding:14px;box-shadow:var(--shadow)
      }
      .nav-links{flex-direction:column;align-items:stretch}
      .nav-links a,.nav-cta .btn{width:100%;justify-content:center}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }