:root{
      --bg:#f5f7fb;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --text:#132238;
      --muted:#5b6b7f;
      --line:#dbe4f0;
      --primary:#1f6bff;
      --primary-2:#00c2ff;
      --accent:#ffb347;
      --shadow:0 18px 50px rgba(25, 58, 120, .10);
      --shadow-soft:0 10px 24px rgba(25, 58, 120, .08);
      --radius:22px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(31,107,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(0,194,255,.09), transparent 26%),
        linear-gradient(180deg, #ffffff 0%, #f4f8ff 38%, #f5f7fb 100%);
      line-height:1.7;
    }
    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(18px);
      background: rgba(255,255,255,.82);
      border-bottom:1px solid rgba(219,228,240,.8);
    }
    .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:42px;height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:16px; letter-spacing:.4px}
    .brand-text span{display:block; font-size:12px; color:var(--muted)}
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:#30465f; padding:8px 10px; border-radius:999px}
    .nav-links a:hover,.nav-links a:focus{background:#eef4ff; color:var(--primary)}
    .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:11px 16px;
      font-weight:700; font-size:14px; cursor:pointer; transition:.25s ease;
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg, var(--primary), var(--primary-2)); color:#fff; box-shadow:0 12px 28px rgba(31,107,255,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 34px rgba(31,107,255,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:#bed0ef; transform:translateY(-1px)}
    .menu-toggle{display:none}
    .hero{
      padding:46px 0 24px;
      overflow:hidden;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:24px; align-items:stretch;
    }
    .hero-main, .hero-side, .card, .panel{
      background:var(--panel);
      border:1px solid rgba(219,228,240,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .hero-main{
      padding:30px;
      position:relative;
      background:
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(246,250,255,.96)),
        radial-gradient(circle at top right, rgba(31,107,255,.12), transparent 30%);
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:7px 12px;
      border-radius:999px; background:#eef5ff; color:var(--primary); font-size:13px; font-weight:700;
    }
    h1{margin:16px 0 14px; font-size:clamp(30px, 4.2vw, 54px); line-height:1.08; letter-spacing:-.6px}
    .lead{margin:0; color:var(--muted); font-size:16px; max-width:62ch}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin:22px 0 18px}
    .hero-points{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px; margin-top:18px}
    .point{padding:14px 15px; border-radius:18px; background:linear-gradient(180deg, #ffffff, #f7fbff); border:1px solid var(--line)}
    .point strong{display:block; font-size:15px}
    .point span{display:block; font-size:13px; color:var(--muted)}
    .hero-side{padding:22px; background:linear-gradient(180deg, #fff, #f7fbff)}
    .mini-grid{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px}
    .mini{
      padding:16px; border-radius:18px; background:linear-gradient(180deg, #fefefe, #f3f8ff);
      border:1px solid #e3ebf7; min-height:110px;
    }
    .mini strong{display:block; font-size:15px; margin-bottom:6px}
    .mini p{margin:0; color:var(--muted); font-size:13px}
    .section{padding:20px 0}
    .section-title{display:flex; justify-content:space-between; align-items:end; gap:16px; margin-bottom:14px}
    .section-title h2{margin:0; font-size:clamp(24px, 2.6vw, 36px); line-height:1.15}
    .section-title p{margin:0; color:var(--muted); max-width:60ch}
    .stats{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:16px}
    .stat{padding:20px; position:relative; overflow:hidden}
    .stat::after{content:""; position:absolute; inset:auto -24px -24px auto; width:88px; height:88px; border-radius:50%; background:radial-gradient(circle, rgba(31,107,255,.16), transparent 70%)}
    .stat strong{display:block; font-size:28px; line-height:1.1}
    .stat span{display:block; margin-top:6px; color:var(--muted); font-size:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px; font-size:18px}
    .card p,.card li{color:var(--muted)}
    .card ul{margin:0; padding-left:18px}
    .feature-top{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .chip{font-size:12px; padding:6px 10px; border-radius:999px; background:#eef5ff; color:var(--primary); font-weight:700}
    .flow{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:16px}
    .step{padding:18px; position:relative}
    .step .num{font-size:12px; color:var(--primary); font-weight:800; letter-spacing:.12em}
    .step h3{margin:10px 0 8px}
    .comparison-wrap{overflow:auto; border-radius:var(--radius); border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-soft)}
    table{width:100%; border-collapse:collapse; min-width:860px; background:#fff}
    th,td{padding:16px 14px; border-bottom:1px solid #e8eef7; vertical-align:top; text-align:left}
    th{background:#f4f8ff; color:#21324a; font-size:14px}
    td{color:var(--muted); font-size:14px}
    .scorebox{display:grid; grid-template-columns:.95fr 1.05fr; gap:16px}
    .rating{
      padding:22px; border-radius:var(--radius); background:linear-gradient(135deg, #133a7c, #1f6bff 58%, #00c2ff);
      color:#fff; box-shadow:0 20px 40px rgba(31,107,255,.22)
    }
    .rating .stars{font-size:22px; letter-spacing:4px; margin:8px 0}
    .rating .big{font-size:42px; font-weight:900; line-height:1}
    .rating p{margin:10px 0 0; color:rgba(255,255,255,.92)}
    .checklist{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px}
    .check{padding:16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .check strong{display:block; margin-bottom:4px}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 14px; border-radius:999px; background:#fff; border:1px solid var(--line); box-shadow:0 6px 16px rgba(25,58,120,.05); color:#31465d; font-size:14px}
    .panel{padding:20px}
    .split{display:grid; grid-template-columns:1fr 1fr; gap:16px}
    .media-row{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:12px}
    .ai-page-image{border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow-soft); background:#fff; width:100%; height:auto}
    .reviews{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .review .role{font-size:13px; color:var(--primary); font-weight:700}
    .review p{margin:0; color:var(--muted)}
    .faq details{background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow-soft); overflow:hidden}
    .faq details+details{margin-top:12px}
    .faq summary{list-style:none; cursor:pointer; padding:18px 18px; font-weight:700}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{padding:0 18px 18px; color:var(--muted)}
    .article-list{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .article{padding:18px}
    .article time{display:block; font-size:13px; color:var(--muted); margin-bottom:8px}
    .article a{font-weight:700}
    .form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .field{display:flex; flex-direction:column; gap:8px}
    .field label{font-size:14px; font-weight:700}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px;
      font:inherit; background:#fff; color:var(--text); outline:none;
    }
    .field textarea{min-height:128px; resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#99b8ff; box-shadow:0 0 0 4px rgba(31,107,255,.10)}
    .form-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:12px}
    .footer{
      margin-top:22px; background:#0f2344; color:#dbe8ff; padding:28px 0 18px
    }
    .footer a{color:#ffffff}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px}
    .footer h3{margin:0 0 10px; color:#fff}
    .footer p,.footer li{color:#d1def5}
    .footer ul{margin:0; padding-left:18px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12); margin-top:18px; padding-top:14px; font-size:13px; color:#b8c9e7}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:flex; flex-direction:column; gap:10px;
    }
    .float-btn{
      width:50px; height:50px; border-radius:16px; display:grid; place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--primary-2)); color:#fff;
      box-shadow:0 14px 30px rgba(31,107,255,.28); border:none; cursor:pointer;
    }
    .客服卡{
      position:fixed; right:18px; bottom:82px; width:min(320px, calc(100vw - 36px));
      background:#fff; border:1px solid var(--line); border-radius:20px; box-shadow:var(--shadow);
      padding:16px; display:none; z-index:59;
    }
    .客服卡.show{display:block}
    .客服卡 h4{margin:0 0 10px}
    .客服卡 .qr{display:grid; grid-template-columns:88px 1fr; gap:12px; align-items:center}
    .qr img{width:88px; height:88px; object-fit:cover; border-radius:14px; border:1px solid var(--line)}
    .muted{color:var(--muted)}
    .anchor-gap{scroll-margin-top:92px}
    .topline{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:12px}
    .service-strip{display:grid; grid-template-columns:repeat(5, minmax(0,1fr)); gap:12px}
    .service-strip .strip{padding:14px; border-radius:18px; background:#fff; border:1px solid var(--line); color:#33495f}
    .service-strip .strip strong{display:block; margin-bottom:4px}
    .timeline{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:12px}
    .timeline .t{padding:16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .timeline .t b{display:block; color:var(--primary); margin-bottom:6px}
    .table-card{padding:0}
    .table-card .head{padding:18px 20px 0}
    .mobile-only{display:none}
    .note{font-size:13px; color:var(--muted)}
    .banner-images{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px}
    .article-links{display:flex; flex-wrap:wrap; gap:10px}
    .article-links a{padding:8px 12px; border-radius:999px; background:#eef5ff; color:var(--primary); font-size:13px}
    @media (max-width: 1024px){
      .hero-grid,.scorebox,.split,.footer-grid{grid-template-columns:1fr}
      .stats,.grid-3,.flow,.reviews,.article-list,.service-strip,.timeline{grid-template-columns:repeat(2, minmax(0,1fr))}
      .media-row{grid-template-columns:repeat(2, minmax(0,1fr))}
    }
    @media (max-width: 760px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .nav-links,.nav-actions{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel{display:none; padding:0 0 14px}
      .mobile-panel.show{display:block}
      .mobile-panel a{display:block; padding:10px 0; color:#30465f; border-top:1px solid #eef2f7}
      .hero{padding-top:18px}
      .hero-main,.hero-side,.card,.panel{border-radius:18px}
      .hero-points,.mini-grid,.stats,.grid-3,.flow,.reviews,.article-list,.form-grid,.banner-images,.service-strip,.timeline,.checklist,.media-row{grid-template-columns:1fr}
      .section-title{flex-direction:column; align-items:flex-start}
      .mobile-only{display:block}
      .faq summary{padding-right:42px}
    }
    .reveal{opacity:0; transform:translateY(14px); transition:.55s ease}
    .reveal.in{opacity:1; transform:none}
    .backtop{position:fixed; right:18px; bottom:148px}