:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --ink:#182033;
      --muted:#5a647a;
      --line:#dce3f1;
      --brand:#5b7cff;
      --brand2:#7d4cff;
      --brand3:#23c7b8;
      --accent:#ff8d5c;
      --shadow:0 18px 50px rgba(32,45,86,.10);
      --radius:20px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at top left, rgba(91,124,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(35,199,184,.10), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 36%, #f5f7fd 100%);
      line-height:1.6;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(12px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(220,227,241,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 10px 26px rgba(61,84,139,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem;letter-spacing:.5px}
    .brand-text span{display:block;font-size:.82rem;color:var(--muted)}
    .nav-links{
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end;
      font-size:.95rem;color:#2c3550;
    }
    .nav-links a{padding:8px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:4px;width:0;height:2px;border-radius:999px;
      background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.22s ease;
    }
    .nav-links a:hover::after,.nav-links a:focus::after{width:100%}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:12px 18px;
      font-weight:700;cursor:pointer;transition:.22s ease;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 24px rgba(91,124,255,.25)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(91,124,255,.32)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#c4cde4}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer}
    .menu-toggle span{display:block;width:20px;height:2px;background:#27324b;margin:4px 0;border-radius:999px}

    .hero{padding:34px 0 18px}
    .hero-shell{
      border:1px solid rgba(220,227,241,.9);
      background:
        linear-gradient(135deg, rgba(255,255,255,.96), rgba(240,245,255,.92)),
        radial-gradient(circle at 12% 18%, rgba(255,141,92,.12), transparent 20%),
        radial-gradient(circle at 85% 25%, rgba(35,199,184,.12), transparent 18%);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:stretch;
      padding:34px;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(91,124,255,.08);color:#3e57c7;border:1px solid rgba(91,124,255,.18);
      padding:8px 12px;border-radius:999px;font-size:.88rem;font-weight:700;
    }
    .hero h1{margin:16px 0 14px;font-size:clamp(2rem,4vw,3.6rem);line-height:1.1;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:1.05rem;max-width:62ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{
      display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px
    }
    .mini-stat{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;
      box-shadow:0 10px 28px rgba(40,59,105,.06)
    }
    .mini-stat strong{display:block;font-size:1.25rem}
    .mini-stat span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}
    .hero-aside{
      display:flex;flex-direction:column;gap:14px
    }
    .hero-panel{
      background:linear-gradient(180deg,#ffffff, #f7f9ff);
      border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 12px 24px rgba(35,45,86,.06)
    }
    .hero-panel h3{margin:0 0 10px;font-size:1.05rem}
    .badge-row{display:flex;flex-wrap:wrap;gap:8px}
    .badge{
      padding:7px 10px;border-radius:999px;background:rgba(91,124,255,.08);color:#3b4dc2;
      border:1px solid rgba(91,124,255,.16);font-size:.86rem
    }
    .hero-signal{
      display:grid;grid-template-columns:1fr 1fr;gap:12px
    }
    .signal{
      padding:14px;border-radius:18px;background:linear-gradient(135deg,rgba(91,124,255,.08),rgba(35,199,184,.08));
      border:1px solid rgba(91,124,255,.14)
    }
    .signal strong{display:block;font-size:1.05rem}
    .signal span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}

    main{padding-bottom:22px}
    section{padding:20px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h2{margin:0;font-size:clamp(1.4rem,2.2vw,2rem)}
    .section-title p{margin:0;color:var(--muted);max-width:62ch}

    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .card{
      background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
      box-shadow:0 12px 28px rgba(29,40,77,.05);padding:18px;transition:.22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(29,40,77,.10)}
    .stat strong{display:block;font-size:1.5rem;margin-bottom:6px}
    .stat span{color:var(--muted);font-size:.92rem}

    .service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .service-item{
      padding:18px;border-radius:22px;background:
        linear-gradient(180deg,#fff, #fbfcff);
      border:1px solid var(--line);
    }
    .service-item h3{margin:0 0 8px;font-size:1.05rem}
    .service-item p{margin:0;color:var(--muted)}
    .service-item .tagline{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}

    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .step{
      position:relative;padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line)
    }
    .step .num{
      width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
      color:#fff;font-weight:800;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-bottom:12px
    }
    .step h3{margin:0 0 8px;font-size:1rem}
    .step p{margin:0;color:var(--muted);font-size:.93rem}

    .table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:0 12px 28px rgba(29,40,77,.05)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top}
    th{background:#f8faff;color:#28324a;font-size:.95rem}
    td{color:#445067}
    tr:last-child td{border-bottom:none}

    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#384360}
    .compare-highlight{
      background:linear-gradient(135deg, rgba(91,124,255,.09), rgba(255,141,92,.10));
      border:1px solid rgba(91,124,255,.16);
      border-radius:24px;padding:20px
    }
    .score{
      display:flex;align-items:center;gap:14px;flex-wrap:wrap
    }
    .score .star{
      font-size:1.1rem;color:#d79a00;background:#fff;border:1px solid #f0dd9c;border-radius:999px;padding:8px 12px
    }

    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline .card{position:relative}
    .timeline .card::before{
      content:"";position:absolute;left:18px;top:18px;width:10px;height:10px;border-radius:50%;background:var(--brand3)
    }
    .timeline .card{padding-left:34px}

    .faq{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .faq-item{
      border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden
    }
    .faq-q{
      width:100%;text-align:left;border:none;background:#fff;padding:16px 18px;font-size:1rem;font-weight:700;color:var(--ink);
      display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer
    }
    .faq-a{padding:0 18px 16px;color:var(--muted);display:none}
    .faq-item.active .faq-a{display:block}

    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .avatar{
      width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(91,124,255,.18),rgba(35,199,184,.18));
      display:inline-flex;align-items:center;justify-content:center;font-weight:800;color:#30417d
    }
    .review p{margin:0;color:#475066}
    .review .role{color:var(--muted);font-size:.9rem}

    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article h3{margin:0 0 10px;font-size:1.02rem}
    .article p{margin:0;color:var(--muted)}
    .article .more{display:inline-flex;margin-top:14px;color:#3c54d2;font-weight:700}

    .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px;align-items:start}
    form{
      display:grid;grid-template-columns:repeat(2,1fr);gap:12px
    }
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1 / -1}
    label{font-weight:700;font-size:.93rem}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--ink);
      outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#94a8ff;box-shadow:0 0 0 4px rgba(91,124,255,.10)}
    textarea{min-height:120px;resize:vertical}
    .form-note{color:var(--muted);font-size:.9rem;margin-top:8px}
    .contact-side .card + .card{margin-top:14px}
    .qrcode{display:flex;gap:14px;align-items:center}
    .qrcode img{width:116px;height:116px;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#fff}
    .small-links{display:flex;flex-wrap:wrap;gap:10px}
    .small-links a{padding:8px 10px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#33405f;font-size:.92rem}

    .footer{
      margin-top:18px;padding:20px 0 24px;border-top:1px solid rgba(220,227,241,.9);
      background:#f4f7fe;color:#263149
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .footer h3{margin:0 0 12px;font-size:1rem}
    .footer p,.footer a,.footer li{color:#38445d}
    .footer ul{margin:0;padding-left:18px}
    .footer .copyright{margin-top:16px;padding-top:14px;border-top:1px solid #dde4f4;color:#5a657c;font-size:.92rem}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{display:inline-flex;padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}

    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand2));
      color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 16px 30px rgba(91,124,255,.3)
    }
    .float-kefu{
      position:fixed;left:18px;bottom:18px;z-index:60;
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px 14px;box-shadow:var(--shadow)
    }
    .float-kefu strong{display:block;font-size:.95rem}
    .float-kefu span{display:block;color:var(--muted);font-size:.86rem;margin-top:2px}

    .reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    .anchor-title{display:flex;align-items:center;gap:10px}
    .anchor-title i{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand3),var(--brand))}
    .scrollbar-x{overflow-x:auto}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:9px 12px;border-radius:999px;background:linear-gradient(135deg,#fff, #f8fbff);
      border:1px solid var(--line);color:#405069
    }

    @media (max-width: 1080px){
      .hero-grid,.contact-grid,.footer-grid,.grid-4,.grid-3,.grid-2,.reviews,.articles,.faq,.timeline,.process{grid-template-columns:1fr 1fr}
      .service-list{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .hero-signal{grid-template-columns:1fr}
      .process{grid-template-columns:1fr 1fr}
      .timeline{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:10px
      }
      .nav-links.show{display:flex}
      .menu-toggle{display:inline-flex}
      .nav-actions .btn-ghost{display:none}
      .hero-grid,.contact-grid,.footer-grid,.grid-4,.grid-3,.grid-2,.reviews,.articles,.faq,.timeline,.process{grid-template-columns:1fr}
      .hero-grid{padding:24px}
      .hero p{font-size:1rem}
      .section-title{flex-direction:column;align-items:flex-start}
      form{grid-template-columns:1fr}
      table{min-width:760px}
      .floating{right:12px;bottom:12px}
      .float-kefu{left:12px;bottom:12px;max-width:220px}
      .hero-cta .btn{width:100%}
    }