:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f1f6ff;
      --text:#162033;
      --muted:#5f6d84;
      --line:#dce4f2;
      --brand:#2563eb;
      --brand-2:#7c3aed;
      --accent:#12b8a6;
      --warm:#f59e0b;
      --shadow:0 18px 40px rgba(21, 41, 77, .09);
      --shadow-2:0 10px 28px rgba(37, 99, 235, .14);
      --radius:20px;
      --radius-sm:14px;
      --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(124,58,237,.09), transparent 30%),
        radial-gradient(circle at top right, rgba(18,184,166,.10), transparent 26%),
        linear-gradient(180deg, #f8fbff 0%, #f6f8fc 100%);
      overflow-x:hidden;
    }
    a{color:var(--brand);text-decoration:none}
    a:hover{color:#1746b1}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar, header, main, footer{position:relative}
    .nav{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(14px);
      background:rgba(248,251,255,.78);
      border-bottom:1px solid rgba(220,228,242,.8);
    }
    .nav-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:40px;height:40px;object-fit:contain;border-radius:10px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.06);padding:4px}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem;line-height:1.1}
    .brand-text span{display:block;font-size:.88rem;color:var(--muted);margin-top:3px}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:10px 12px;border-radius:12px;font-weight:700
    }
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{color:var(--text);font-weight:600;font-size:.95rem}
    .nav-links a:hover{color:var(--brand)}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, color .22s ease;
      cursor:pointer;white-space:nowrap
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:var(--shadow-2)}
    .btn-light{background:#fff;color:var(--text);border:1px solid var(--line)}
    .hero{padding:38px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel,.faq-item,.review,.timeline-item,.metric,.compare-box,.article-item,.step,.service-card,.match-box,.pricing-card,.contact-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(220,228,242,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px; position:relative; overflow:hidden}
    .hero-main:before,.hero-side:before{
      content:""; position:absolute; inset:auto -20% -30% auto; width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(37,99,235,.16), transparent 66%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      background:linear-gradient(135deg, rgba(37,99,235,.10), rgba(124,58,237,.10));
      color:#24428a;border:1px solid rgba(37,99,235,.12);
      padding:8px 12px;border-radius:999px;font-size:.88rem;font-weight:700
    }
    h1{margin:14px 0 12px;font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:1.02rem;line-height:1.78}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .point{
      background:linear-gradient(180deg, #f8fbff, #ffffff);
      border:1px solid var(--line); border-radius:16px; padding:14px
    }
    .point strong{display:block;font-size:1.1rem}
    .point span{display:block;color:var(--muted);font-size:.88rem;margin-top:5px;line-height:1.5}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start;position:relative;overflow:hidden}
    .side-kpi{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{padding:16px;background:linear-gradient(180deg,#fff, #f8fbff)}
    .metric strong{display:block;font-size:1.35rem}
    .metric span{display:block;color:var(--muted);font-size:.86rem;margin-top:6px;line-height:1.5}
    .side-badge{
      display:flex;align-items:center;justify-content:space-between;gap:10px;
      background:linear-gradient(135deg, rgba(18,184,166,.10), rgba(37,99,235,.08));
      border:1px solid rgba(18,184,166,.18); padding:14px 16px; border-radius:16px
    }
    .side-badge b{display:block}
    .side-badge small{color:var(--muted)}
    .section{padding:20px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(1.45rem,2.5vw,2.1rem)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card,.panel,.service-card,.step,.review,.article-item,.faq-item,.compare-box,.pricing-card,.contact-card,.match-box{padding:18px}
    .card h3,.service-card h3,.step h3,.review h3,.article-item h3,.pricing-card h3,.contact-card h3,.match-box h3{margin:0 0 8px;font-size:1.08rem}
    .card p,.service-card p,.step p,.review p,.article-item p,.pricing-card p,.contact-card p,.match-box p{margin:0;color:var(--muted);line-height:1.72}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#274166;font-weight:600;font-size:.92rem
    }
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-item{padding:18px;position:relative}
    .timeline-item .num{
      display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:12px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;margin-bottom:12px
    }
    .compare-wrap,.faq-list,.reviews,.articles{display:grid;gap:16px}
    .compare-box{overflow:hidden}
    table{width:100%;border-collapse:collapse}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#23314d}
    .score{font-weight:800;color:#0f7a5d}
    .mobile-scroll{overflow-x:auto}
    details.faq-item{padding:0}
    details.faq-item summary{
      list-style:none; cursor:pointer; padding:18px; font-weight:700; display:flex; align-items:center; justify-content:space-between; gap:14px
    }
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item .faq-content{padding:0 18px 18px;color:var(--muted);line-height:1.75}
    .review-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
    .review .role{color:#2c4a7c;font-weight:700;font-size:.92rem}
    .stars{color:#f59e0b;letter-spacing:1px;font-size:1rem}
    .article-item{display:flex;flex-direction:column;gap:10px}
    .article-item .meta{font-size:.88rem;color:var(--muted)}
    .pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .pricing-card{position:relative;overflow:hidden}
    .pricing-card.featured{border-color:rgba(37,99,235,.28);box-shadow:0 18px 40px rgba(37,99,235,.14)}
    .price{font-size:2rem;font-weight:900;margin:8px 0 6px}
    .price small{font-size:.88rem;color:var(--muted);font-weight:600}
    .list{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.65}
    .list li:before{content:"✦";color:var(--brand);font-weight:900;margin-top:1px}
    .contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .fields{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    input,select,textarea{
      width:100%; padding:13px 14px; border:1px solid var(--line); border-radius:14px;
      background:#fff; color:var(--text); font:inherit; outline:none
    }
    textarea{min-height:130px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(37,99,235,.55); box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    .contact-list{display:grid;gap:12px}
    .contact-item{
      display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line)
    }
    .contact-item strong{display:block}
    .contact-item span{display:block;color:var(--muted);margin-top:4px;line-height:1.55}
    .qrcode{max-width:160px;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .footer{
      margin-top:8px;padding:22px 0 28px;border-top:1px solid rgba(220,228,242,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(245,248,252,.92))
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px}
    .footer, .footer a, .footer p, .footer li, .footer small{color:#32435f}
    .footer h3{margin:0 0 10px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .fine{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:16px;border:none;box-shadow:var(--shadow-2);
      display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:18px;cursor:pointer
    }
    .floating .small{width:auto;padding:0 14px;font-weight:800}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease, transform .55s ease}
    .scroll-reveal.in-view{opacity:1;transform:translateY(0)}
    .hero-main,.hero-side,.card,.service-card,.step,.review,.article-item,.faq-item,.compare-box,.pricing-card,.contact-card,.match-box,.timeline-item{transition:transform .22s ease, box-shadow .22s ease}
    .hero-main:hover,.hero-side:hover,.card:hover,.service-card:hover,.step:hover,.review:hover,.article-item:hover,.pricing-card:hover,.contact-card:hover,.match-box:hover,.timeline-item:hover{transform:translateY(-3px)}
    .subtle{color:var(--muted)}
    .home-link{font-weight:800}
    .hero .home-link{display:inline-flex;margin-top:14px}
    .label{display:inline-block;font-size:.82rem;font-weight:800;color:#35558e;background:#eef4ff;border:1px solid #dbe7ff;padding:6px 10px;border-radius:999px}
    .mini-title{font-size:.92rem;font-weight:800;color:#345}
    .seo-box{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .seo-item{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .seo-item strong{display:block;margin-bottom:6px}
    .center{text-align:center}
    .muted{color:var(--muted)}
    @media (max-width: 1024px){
      .hero-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
      .service-grid,.grid-4,.pricing-grid,.timeline{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .menu-toggle{display:inline-flex}
      .nav-links{display:none; width:100%; padding:12px 0 2px; flex-direction:column; align-items:flex-start}
      .nav-links.open{display:flex}
      .nav-inner{flex-wrap:wrap}
      .nav-cta{width:100%; justify-content:flex-start; flex-wrap:wrap}
      .grid-3,.grid-4,.service-grid,.pricing-grid,.timeline,.fields,.seo-box{grid-template-columns:1fr}
      .hero{padding-top:20px}
      .hero-main,.hero-side{padding:20px}
      h1{font-size:2rem}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-scroll table{min-width:860px}
      th,td{font-size:.92rem}
      .floating .small{display:none}
    }