:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#f9fbff;
      --text:#1c2430;
      --muted:#5f6b7a;
      --line:#dce4f0;
      --brand:#5b5ef7;
      --brand2:#00b8d9;
      --accent:#ff5ca8;
      --gold:#ffcb6b;
      --shadow:0 18px 50px rgba(35,49,84,.10);
      --shadow2:0 12px 24px rgba(29,38,60,.08);
      --radius:22px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(91,94,247,.10), transparent 24%),
        radial-gradient(circle at top right, rgba(0,184,217,.10), transparent 22%),
        linear-gradient(180deg, #fbfcff 0%, #f4f7fc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.84);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(220,228,240,.75);
    }
    .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;box-shadow:var(--shadow2);padding:4px}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:4px}
    .nav-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px 10px;align-items:center}
    .nav-links a{
      font-size:14px;padding:10px 12px;border-radius:999px;color:var(--text);
      transition:.25s ease;background:transparent;
    }
    .nav-links a:hover{background:#eef3ff;color:#25324a}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 16px;border-radius:14px;border:1px solid transparent;
      font-weight:700;transition:.25s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#7a5cff);color:#fff;box-shadow:0 14px 28px rgba(91,94,247,.24)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 18px 34px rgba(91,94,247,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#bfcaf0;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{
      padding:36px 0 24px;
      position:relative;
      overflow:hidden;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch;
    }
    .hero-copy,.hero-side,.card,.section-card,.faq-item,.review-card,.metric,.case-item,.article-item,.price-box,.timeline-item,.contact-box,.footer-box,.compare-table-wrap,.service-pill,.network-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(220,228,240,.88);
      box-shadow:var(--shadow2);
      border-radius:var(--radius);
    }
    .hero-copy{
      padding:30px;
      position:relative;
      overflow:hidden;
    }
    .hero-copy:before{
      content:"";position:absolute;inset:auto -20% -30% auto;width:260px;height:260px;border-radius:50%;
      background:radial-gradient(circle, rgba(0,184,217,.16), transparent 68%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:linear-gradient(90deg, rgba(91,94,247,.12), rgba(0,184,217,.12));
      color:#3a4a68;font-weight:700;font-size:13px;
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero-copy p{margin:0;color:var(--muted);line-height:1.85;font-size:16px;max-width:62ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .metric{padding:18px}
    .metric strong{display:block;font-size:26px;line-height:1;color:#24324b}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .side-highlights{display:grid;gap:12px}
    .service-pill{padding:14px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center}
    .service-pill b{font-size:15px}
    .service-pill span{font-size:13px;color:var(--muted)}
    .section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:14px;align-items:end;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px;line-height:1.1}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .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,.section-card,.review-card,.price-box,.contact-box,.network-card,.case-item,.article-item,.timeline-item,.compare-table-wrap{padding:22px}
    .card h3,.section-card h3,.review-card h3,.case-item h3,.article-item h3,.timeline-item h3,.price-box h3,.contact-box h3,.network-card h3{margin:0 0 10px;font-size:18px}
    .card p,.section-card p,.review-card p,.case-item p,.article-item p,.timeline-item p,.price-box p,.contact-box p,.network-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg, rgba(91,94,247,.12), rgba(0,184,217,.12));
      color:#334066;font-weight:800;
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#31415d;font-size:13px;box-shadow:0 6px 16px rgba(29,38,60,.04)
    }
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      position:relative;padding:20px 18px 18px;background:rgba(255,255,255,.9);
      border:1px solid rgba(220,228,240,.9);border-radius:20px;box-shadow:var(--shadow2)
    }
    .step-num{
      width:34px;height:34px;border-radius:50%;display:grid;place-items:center;margin-bottom:12px;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;
    }
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f6f8ff;color:#24324b;font-size:14px}
    td{color:var(--text);font-size:14px;line-height:1.65}
    .good{color:#0a8f5b;font-weight:700}
    .bad{color:#c45b1a;font-weight:700}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 20px;
      display:flex;justify-content:space-between;gap:14px;align-items:center;
      font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;color:var(--muted);line-height:1.8}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .faq-q{color:#22314f}
    .reviews,.cases,.articles,.network,.pricing,.timeline,.compare,.contact{display:grid;gap:16px}
    .review-meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
    .stars{color:#f3b500;letter-spacing:1px}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#eef7ff;color:#26476d;font-size:12px;font-weight:700}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-box strong{display:block;font-size:28px;margin:10px 0;color:#20304a}
    .price-box ul{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .price-box li{color:var(--muted);line-height:1.6}
    .price-box li:before{content:"• ";color:var(--brand);font-weight:800}
    .article-item small{color:#7b8797}
    .footer{
      margin-top:18px;
      padding:22px 0 26px;
      border-top:1px solid rgba(220,228,240,.9);
      background:rgba(255,255,255,.68);
    }
    .footer-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:start}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:10px;background:#f5f7fd;border:1px solid var(--line);color:#30405b;font-size:13px}
    .float-box{
      position:fixed;right:18px;bottom:18px;z-index:80;display:grid;gap:10px
    }
    .float-box a,.float-box button{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-width:52px;min-height:52px;padding:0 14px;border-radius:16px;border:1px solid var(--line);
      background:#fff;box-shadow:var(--shadow2);color:#24324b;font-weight:700;cursor:pointer
    }
    .mini-qr{
      display:flex;gap:14px;align-items:center
    }
    .mini-qr img{width:92px;height:92px;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#fff}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .form-grid .full{grid-column:1 / -1}
    label{display:block;font-size:13px;font-weight:700;color:#34415a;margin-bottom:8px}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#98aaf0;box-shadow:0 0 0 4px rgba(91,94,247,.08)}
    textarea{min-height:118px;resize:vertical}
    .subtle{color:var(--muted);font-size:13px;line-height:1.7}
    .compare-card{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .rating-box{
      padding:20px;border-radius:20px;background:linear-gradient(135deg, rgba(91,94,247,.10), rgba(0,184,217,.10));
      border:1px solid rgba(91,94,247,.18)
    }
    .rating-box strong{display:block;font-size:40px;line-height:1;margin:8px 0;color:#23314b}
    .scroll-table{overflow:auto;border-radius:18px}
    .scroll-table::-webkit-scrollbar{height:10px}
    .scroll-table::-webkit-scrollbar-thumb{background:#ccd5ea;border-radius:999px}
    .mobile-only{display:none}
    .reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-3,.process,.price-grid,.compare-card,.footer-inner,.grid-2{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:76px;flex-direction:column;align-items:flex-start;
        padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav.open{position:relative}
      .nav-actions .btn-ghost{display:none}
      .hero-copy,.hero-side,.card,.section-card,.review-card,.price-box,.contact-box,.network-card,.case-item,.article-item,.timeline-item,.compare-table-wrap{padding:18px}
      .hero-stats{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
      .desktop-table{display:none}
    }