:root{
      --bg:#f6f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#162033;
      --muted:#5e6a82;
      --line:#dde6f4;
      --brand:#1677ff;
      --brand2:#08c6d1;
      --brand3:#7b5cff;
      --ok:#19a974;
      --warn:#ff9f1a;
      --shadow:0 18px 48px rgba(20,44,92,.08);
      --radius:22px;
      --radius2:16px;
      --container: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(--text);
      background:
        radial-gradient(circle at 20% 0%, rgba(22,119,255,.12), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(8,198,209,.14), transparent 24%),
        linear-gradient(180deg, #fbfdff 0%, var(--bg) 50%, #f8fbff 100%);
      line-height:1.65;
    }
    a{color:var(--brand);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:40;
      backdrop-filter: blur(14px);
      background:rgba(251,253,255,.84);
      border-bottom:1px solid rgba(221,230,244,.85);
    }
    .nav{
      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:46px;height:46px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;border:1px solid var(--line)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 12px;font-weight:600;
    }
    .nav-links{
      display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:flex-end;
      font-size:14px;
    }
    .nav-links a{color:var(--text);padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a:focus{background:#edf4ff;color:var(--brand)}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.price-table,.faq-item,.quote,.form-wrap,.timeline,.compare,.article-box,.intro-box,.mini-card{
      background:var(--card);border:1px solid rgba(221,230,244,.9);box-shadow:var(--shadow);border-radius:var(--radius)
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;right:-70px;top:-90px;background:radial-gradient(circle, rgba(22,119,255,.18), transparent 62%)}
    .hero-main::after{width:180px;height:180px;right:40px;bottom:-90px;background:radial-gradient(circle, rgba(8,198,209,.18), transparent 65%)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:linear-gradient(135deg, rgba(22,119,255,.12), rgba(8,198,209,.12));
      color:#0f4ed8;font-weight:700;font-size:13px
    }
    h1{margin:18px 0 12px;font-size:clamp(30px,4.8vw,54px);line-height:1.08;letter-spacing:-.03em}
    .hero-main p{margin:0;color:var(--muted);font-size:16px;max-width:64ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
      cursor:pointer
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand3));color:#fff;box-shadow:0 16px 30px rgba(22,119,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .tag{padding:8px 12px;border-radius:999px;background:#f3f7ff;color:#24406d;border:1px solid #dce8ff;font-size:13px}
    .hero-side{padding:22px}
    .side-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
    .metric{padding:15px;border-radius:18px;background:linear-gradient(180deg,#fbfdff,#f3f7ff);border:1px solid var(--line)}
    .metric strong{display:block;font-size:22px;line-height:1.1}
    .metric span{color:var(--muted);font-size:13px}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li,.intro-box p,.quote p,.faq-item p,.article-box p,.panel p,.form-wrap p{color:var(--muted)}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(22,119,255,.12), rgba(123,92,255,.12));
      color:#174ecb;font-weight:800;margin-bottom:12px
    }
    .list{margin:0;padding-left:18px}
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid var(--line)}
    .step b{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:10px;background:#eaf2ff;color:#0f4ed8;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:17px}
    .compare{padding:16px;overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f8ff;font-size:14px}
    .star{color:#ffb400;font-weight:800}
    .pill{display:inline-flex;align-items:center;padding:5px 10px;border-radius:999px;background:#eaf7f1;color:#06724f;font-size:12px;font-weight:700}
    .panel{padding:20px}
    .panel-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    .cloud{display:flex;flex-wrap:wrap;gap:10px}
    .cloud span{padding:9px 12px;border-radius:999px;background:#f4f7fd;border:1px solid var(--line);font-size:13px}
    .price-table{padding:18px;overflow:auto}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;text-align:left;background:#fff;border:0;padding:18px 20px;color:var(--text);font-size:16px;font-weight:700;
      display:flex;justify-content:space-between;align-items:center;cursor:pointer
    }
    .faq-a{padding:0 20px 18px;display:none}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q .arrow{transform:rotate(180deg)}
    .faq-q .arrow{transition:transform .2s ease;color:var(--muted)}
    .quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{padding:20px}
    .quote .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .quote .name{font-weight:800}
    .quote .role{color:var(--muted);font-size:13px}
    .timeline{padding:20px}
    .timeline-list{display:grid;gap:14px}
    .time-item{display:grid;grid-template-columns:110px 1fr;gap:12px;align-items:start;padding:14px 0;border-bottom:1px dashed var(--line)}
    .time-item:last-child{border-bottom:0;padding-bottom:0}
    .time-item .time{font-weight:800;color:#1247bd}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-box{padding:18px}
    .article-box h3{margin:0 0 10px;font-size:17px}
    .article-box .meta{font-size:13px;color:var(--muted);margin-bottom:8px}
    .form-wrap{padding:22px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:grid;gap:8px;font-weight:700;font-size:14px}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text);
      font:inherit;outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#93bcff;box-shadow:0 0 0 4px rgba(22,119,255,.08)}
    .contact-grid{display:grid;grid-template-columns:1fr .8fr;gap:16px;align-items:start}
    footer{
      margin-top:14px;background:#0f1c34;color:#d9e5ff;border-top:1px solid rgba(255,255,255,.1)
    }
    footer a{color:#9fd0ff}
    .footer-inner{padding:28px 0}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .footer-card h3,.footer-card h4{margin:0 0 12px;color:#fff}
    .footer-card p{color:#c8d7f3}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:rgba(255,255,255,.06)}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      border:0;border-radius:999px;box-shadow:0 14px 32px rgba(13,31,60,.18);cursor:pointer
    }
    .floating a{
      display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800
    }
    .top-btn{width:46px;height:46px;background:#fff;color:var(--brand);border:1px solid var(--line)}
    .mobile-only{display:none}
    .gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .media{
      padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);display:grid;gap:10px
    }
    .media img{width:100%;border-radius:14px;aspect-ratio:16/9;object-fit:cover}
    .media small{color:var(--muted)}
    .intro-box{padding:22px}
    .split-note{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .mini-card{padding:16px}
    .rating{
      display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:#fff7e8;border:1px solid #ffe0ad;color:#8a5a00;font-weight:800
    }
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .55s ease, transform .55s ease}
    .reveal.show{opacity:1;transform:translateY(0)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.flow,.quotes,.articles,.footer-grid,.panel-grid,.contact-grid{grid-template-columns:1fr}
      .split-note,.gallery,.form-grid,.time-item{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:70px;flex-direction:column;align-items:flex-start;
        background:#fff;padding:14px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .hero{padding-top:18px}
      .hero-main{padding:24px}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }