:root{
      --bg:#f7f4ee;
      --bg2:#f3f7fb;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#5b6472;
      --line:#e5e7eb;
      --brand:#1f5eff;
      --brand2:#8b5cf6;
      --brand3:#ff8a5b;
      --shadow:0 18px 40px rgba(31,41,55,.08);
      --shadow2:0 10px 22px rgba(31,41,55,.10);
      --radius:20px;
      --radius2:28px;
      --container: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(31,94,255,.10), transparent 28%),
        radial-gradient(circle at 85% 8%, rgba(139,92,246,.12), transparent 20%),
        linear-gradient(180deg, #fcfbf8 0%, #f7f4ee 35%, #f5f7fb 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:var(--brand); text-decoration:none}
    img{display:block; max-width:100%}
    .container{max-width:var(--container); margin:0 auto; padding:0 20px}
    .site-header{
      position:sticky; top:0; z-index:30;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(255,255,255,.76);
      border-bottom:1px solid rgba(229,231,235,.8);
    }
    .header-inner{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:76px;
    }
    .brand{
      display:flex; align-items:center; gap:12px; min-width:0;
    }
    .brand .ai-page-logo{width:42px; height:42px; object-fit:contain}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; line-height:1.2}
    .brand-text span{display:block; font-size:12px; color:var(--muted)}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:10px 12px; box-shadow:var(--shadow2);
    }
    .nav{
      display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end;
    }
    .nav a{color:var(--text); font-size:14px; padding:8px 0; position:relative}
    .nav a::after{
      content:""; position:absolute; left:0; bottom:0; width:100%; height:2px;
      background:linear-gradient(90deg,var(--brand),var(--brand2)); transform:scaleX(0);
      transform-origin:left; transition:.25s ease;
    }
    .nav a:hover::after{transform:scaleX(1)}
    .hero{
      padding:56px 0 26px;
      position:relative;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:""; position:absolute; border-radius:50%; filter:blur(20px); pointer-events:none;
    }
    .hero::before{width:260px; height:260px; background:rgba(31,94,255,.12); top:-80px; right:-60px}
    .hero::after{width:180px; height:180px; background:rgba(255,138,91,.14); left:-70px; top:180px}
    .hero-grid{
      display:grid; grid-template-columns:1.25fr .75fr; gap:24px; align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.faq-item,.quote,.article,.price-card{
      background:rgba(255,255,255,.88); border:1px solid rgba(229,231,235,.95);
      box-shadow:var(--shadow); border-radius:var(--radius2);
    }
    .hero-main{padding:34px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; font-size:13px; color:#1743c7;
      background:linear-gradient(90deg, rgba(31,94,255,.10), rgba(139,92,246,.10));
      border:1px solid rgba(31,94,255,.12); padding:8px 12px; border-radius:999px;
    }
    h1{margin:16px 0 14px; font-size:clamp(32px,4vw,54px); line-height:1.08; letter-spacing:-.02em}
    .hero p{margin:0; color:var(--muted); font-size:16px; max-width:62ch}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:24px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border-radius:14px; padding:13px 18px; font-weight:700; border:1px solid transparent;
      transition:.25s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{
      color:#fff; background:linear-gradient(135deg,var(--brand),var(--brand2));
      box-shadow:0 14px 28px rgba(31,94,255,.22);
    }
    .btn-primary:hover,.btn-secondary:hover,.nav-btn:hover,.submit:hover{transform:translateY(-2px)}
    .btn-secondary{
      color:var(--text); background:#fff; border-color:var(--line);
    }
    .hero-side{padding:24px; display:grid; gap:14px}
    .metric{
      padding:16px; border-radius:18px; background:linear-gradient(180deg, #fff, #f8fbff);
      border:1px solid #edf1f7;
    }
    .metric strong{display:block; font-size:24px}
    .metric span{color:var(--muted); font-size:13px}
    .metrics{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:22px}
    .section{padding:24px 0}
    .section-head{display:flex; justify-content:space-between; gap:14px; align-items:end; margin-bottom:18px}
    .section-head h2{margin:0; font-size:clamp(24px,2.4vw,36px); line-height:1.15}
    .section-head p{margin:0; color:var(--muted); max-width:68ch}
    .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:22px}
    .card h3{margin:10px 0 8px; font-size:18px}
    .card p,.card li,.panel p,.article p,.quote p{color:var(--muted)}
    .icon{
      width:46px; height:46px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(31,94,255,.12), rgba(255,138,91,.16));
      color:#173ec8; font-weight:800;
    }
    .chips{display:flex; flex-wrap:wrap; gap:10px; margin-top:10px}
    .chip{
      padding:8px 12px; border:1px solid var(--line); border-radius:999px; background:#fff;
      font-size:13px; color:#334155;
    }
    .timeline{display:grid; gap:14px}
    .step{
      display:grid; grid-template-columns:56px 1fr; gap:14px; align-items:start;
      padding:18px; border-radius:18px; background:#fff; border:1px solid var(--line);
    }
    .step .num{
      width:56px; height:56px; border-radius:16px; display:grid; place-items:center; font-weight:800; color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand3));
    }
    .table-wrap{overflow-x:auto; border-radius:20px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:16px 14px; border-bottom:1px solid #edf1f7; text-align:left; vertical-align:top}
    th{background:#f8fbff; color:#0f172a; font-size:14px}
    td{color:#334155}
    .rating{display:flex; gap:4px; color:#f59e0b; font-size:20px}
    .highlight{
      background:linear-gradient(135deg, rgba(31,94,255,.08), rgba(139,92,246,.08));
      border:1px solid rgba(31,94,255,.12);
    }
    .faq{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; border:0; background:transparent; padding:18px 20px; font-size:16px; font-weight:700; color:var(--text);
      display:flex; justify-content:space-between; align-items:center; text-align:left; cursor:pointer;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .3s ease; padding:0 20px}
    .faq-item.active .faq-a{padding-bottom:18px; max-height:160px}
    .faq-item.active .faq-q{background:#f8fbff}
    .reviews .quote{padding:20px}
    .quote .meta{display:flex; justify-content:space-between; gap:10px; margin-top:14px; color:#475569; font-size:13px}
    .articles{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article{padding:20px}
    .article .tag{display:inline-block; padding:6px 10px; border-radius:999px; background:#f1f5ff; color:#2541cc; font-size:12px; margin-bottom:12px}
    .form{
      display:grid; gap:14px
    }
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    input,select,textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:14px 14px; font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(31,94,255,.55); box-shadow:0 0 0 4px rgba(31,94,255,.08)}
    .footer{
      margin-top:22px; padding:30px 0 18px; background:#0f172a; color:#e5e7eb;
    }
    .footer a{color:#dbeafe}
    .footer-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:20px}
    .footer small,.footer p{color:#cbd5e1}
    .footer .chip{background:rgba(255,255,255,.06); color:#e5e7eb; border-color:rgba(255,255,255,.12)}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:40; display:grid; gap:10px;
    }
    .floating a,.floating button{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center; border:0; cursor:pointer;
      box-shadow:var(--shadow2); background:#fff; color:var(--text);
    }
    .floating .cta{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff}
    .mobile-panel{display:none}
    .fade-in{opacity:0; transform:translateY(16px); transition:.55s ease}
    .fade-in.show{opacity:1; transform:none}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .services-flow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .mini{
      padding:16px; border:1px solid var(--line); background:#fff; border-radius:18px;
    }
    .mini strong{display:block; margin-bottom:6px}
    .network{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .avatar-list{display:flex; gap:10px; flex-wrap:wrap}
    .avatar{
      padding:10px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#334155; font-size:13px;
    }
    .price-card{padding:18px}
    .price{font-size:30px; font-weight:800; color:#111827}
    .subtle{color:var(--muted); font-size:13px}
    @media (max-width: 960px){
      .hero-grid,.grid-3,.grid-2,.articles,.footer-grid,.network,.services-flow,.metrics,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:start}
      .nav-toggle{display:inline-flex}
      .nav{display:none}
      .nav.open{display:flex; flex-direction:column; align-items:flex-start; padding:14px 0 18px}
      .mobile-panel{display:block}
    }
    @media (max-width: 640px){
      .hero{padding-top:30px}
      .hero-main{padding:24px}
      .hero-actions,.chips{gap:10px}
      .btn{width:100%}
      .btn-secondary,.btn-primary{justify-content:center}
      .step{grid-template-columns:1fr}
      .step .num{width:48px; height:48px}
      .floating{right:12px; bottom:12px}
      .floating a,.floating button{width:48px; height:48px; border-radius:14px}
    }