:root{
      --bg:#f5f7fb;
      --panel:#ffffff;
      --panel-2:#f9fbff;
      --line:#dce6f2;
      --text:#15314d;
      --muted:#58708a;
      --brand:#1e78ff;
      --brand-2:#23c8b9;
      --accent:#ffb020;
      --shadow:0 18px 50px rgba(21,49,77,.10);
      --shadow-soft:0 10px 28px rgba(21,49,77,.08);
      --radius:22px;
      --max: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(30,120,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(35,200,185,.10), transparent 26%),
        linear-gradient(180deg,#ffffff 0%, #f6f9ff 28%, #f4f7fb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(255,255,255,.82);
      border-bottom:1px solid rgba(220,230,242,.7);
    }
    .header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;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;border:1px solid var(--line);padding:6px;box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    .nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav a:hover{background:#eef5ff;color:var(--brand)}
    .nav .cta{background:linear-gradient(135deg,var(--brand),#4f92ff);color:#fff;box-shadow:0 10px 20px rgba(30,120,255,.22)}
    .nav .cta:hover{transform:translateY(-1px);background:linear-gradient(135deg,#1568e8,#3e84ff)}
    .hero{padding:38px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-side,.card,.section,.faq-item,.review,.article,.service-card,.metric,.price-card,.timeline-item,.compare-card,.form-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(220,230,242,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy::before{
      content:"";position:absolute;inset:-2px auto auto -2px;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(30,120,255,.18), rgba(30,120,255,0) 68%);
      pointer-events:none;
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eef6ff;border:1px solid #d5e6ff;color:#2256ad;
      padding:8px 12px;border-radius:999px;font-size:13px;font-weight:600}
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:60ch}
    .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;border:1px solid transparent;font-weight:700;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#3c8dff);color:#fff;box-shadow:0 14px 28px rgba(30,120,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:26px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f8fbff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:22px}
    .stat span{display:block;margin-top:6px;font-size:12px;color:var(--muted);line-height:1.5}
    .hero-side{padding:18px}
    .side-top{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .mini-card{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#ffffff);border:1px solid var(--line)}
    .mini-card h3{margin:0 0 8px;font-size:15px}
    .mini-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .mini-card .num{font-weight:800;color:var(--brand);font-size:20px}
    .side-banner{margin-top:12px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .side-banner .ai-page-image{width:100%;aspect-ratio:16/10;object-fit:cover}
    .section{padding:28px;margin-top:22px}
    .section h2{margin:0 0 10px;font-size:clamp(24px,2.3vw,34px);line-height:1.15}
    .section p.section-desc{margin:0 0 20px;color:var(--muted);line-height:1.8}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card,.compare-card,.review,.article,.timeline-item,.price-card{padding:20px}
    .service-card h3,.review h3,.article h3,.timeline-item h3,.compare-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.review p,.article p,.timeline-item p,.compare-card p,.price-card p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#f3f8ff;border:1px solid var(--line);color:#35597b;font-size:13px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;border-bottom:1px solid #ebf1f7;text-align:left;vertical-align:top;font-size:14px}
    th{background:#f7fbff;color:#183a5f}
    tr:last-child td{border-bottom:none}
    .rating{
      display:flex;align-items:center;gap:12px;flex-wrap:wrap;
      padding:16px 18px;border-radius:18px;background:linear-gradient(135deg,#eff7ff,#ffffff);border:1px solid #d8e7ff;margin-bottom:16px
    }
    .rating strong{font-size:18px}
    .stars{color:#ffb020;letter-spacing:2px;font-size:18px}
    .metrics{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .metric{padding:18px;text-align:center}
    .metric strong{display:block;font-size:28px;color:var(--brand)}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.6}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{position:relative}
    .timeline-item .step{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--brand),#55a3ff);color:#fff;font-weight:800;margin-bottom:12px}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 18px;background:#fff;border:none;color:var(--text);font-size:16px;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;color:var(--muted);padding:0 18px}
    .faq-item.active .faq-a{max-height:220px;padding:0 18px 18px}
    .reviews,.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review .role{display:inline-block;margin-bottom:10px;color:#2a5ea8;font-size:13px;font-weight:700}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-card{padding:22px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:14px;font-weight:700}
    .field input,.field select,.field textarea{
      width:100%;padding:13px 14px;border:1px solid #dbe6f2;border-radius:14px;background:#fff;color:var(--text);font:inherit;outline:none;
    }
    .field textarea{min-height:118px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#7fb2ff;box-shadow:0 0 0 4px rgba(30,120,255,.08)}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
    .footer{margin-top:22px;padding:24px 0 30px;background:#0f2136;color:#d5e3f2}
    .footer a{color:#ffffff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:start}
    .footer .container{width:min(var(--max),calc(100% - 32px))}
    .footer .brand-text span,.footer p,.footer li{color:#a9bed4}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .footer .ai-page-logo{width:48px;height:48px;background:#fff;border-radius:12px;padding:6px}
    .footer-bottom{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#a9bed4}
    .float-tools{position:fixed;right:16px;bottom:16px;z-index:70;display:grid;gap:10px}
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:none;display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,var(--brand),#48a0ff);color:#fff;box-shadow:0 14px 24px rgba(30,120,255,.24);cursor:pointer
    }
    .float-panel{
      position:fixed;right:16px;bottom:78px;z-index:69;width:310px;max-width:calc(100vw - 32px);
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:16px;display:none
    }
    .float-panel.open{display:block}
    .float-panel h3{margin:0 0 10px}
    .qr{border:1px dashed #d7e4f5;border-radius:18px;padding:10px;background:#fbfdff}
    .center-note{color:var(--muted);font-size:13px;line-height:1.7}
    .muted{color:var(--muted)}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .list li{padding-left:18px;position:relative;color:var(--muted);line-height:1.75}
    .list li::before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));position:absolute;left:0;top:.7em}
    .article .meta{font-size:13px;color:#2f6fc3;font-weight:700;margin-bottom:8px}
    .sticky-anchor{scroll-margin-top:92px}
    @media (max-width: 1080px){
      .hero-grid,.grid-3,.reviews,.articles,.metrics,.timeline,.footer-grid,.split{grid-template-columns:1fr 1fr}
      .hero-stats{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .header-inner{flex-wrap:wrap}
      .nav-toggle{display:inline-flex}
      .nav{display:none;width:100%;justify-content:flex-start;padding:8px 0 2px}
      .nav.open{display:flex}
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.metrics,.timeline,.footer-grid,.split,.form-grid,.hero-stats{grid-template-columns:1fr}
      .hero-copy{padding:24px}
      .section{padding:22px}
      .nav a{padding:9px 10px;background:#f7fbff;border:1px solid #e4edf8}
      .float-panel{width:280px}
      table{min-width:760px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
    .reveal.show{opacity:1;transform:none}
    .service-card:hover,.review:hover,.article:hover,.timeline-item:hover,.compare-card:hover,.price-card:hover,.metric:hover,.hero-side:hover{transform:translateY(-3px);transition:transform .2s ease,box-shadow .2s ease;box-shadow:var(--shadow)}
    .kicker{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
    .kicker .mini{padding:8px 11px;border-radius:999px;background:#eef8ff;border:1px solid #d5e7ff;color:#2a5ea8;font-size:12px;font-weight:700}
    .top-box{padding:18px;border-radius:18px;background:linear-gradient(135deg,#f6fbff,#ffffff);border:1px solid var(--line)}