:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#f1f4ff;
      --text:#172033;
      --muted:#5e6a84;
      --line:#d9e0ef;
      --accent:#6a5cff;
      --accent-2:#ff4d8d;
      --accent-3:#08b6a5;
      --shadow:0 18px 50px rgba(26,35,74,.12);
      --radius:22px;
      --radius-sm:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(255,77,141,.10), transparent 24%),
      radial-gradient(circle at top right, rgba(106,92,255,.12), transparent 22%),
      linear-gradient(180deg,#fbfbfe 0%,#f6f7fb 100%);
      color:var(--text);line-height:1.65}
    a{color:var(--accent);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;background:rgba(251,251,254,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,224,239,.8)}
    .nav{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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:5px;border:1px solid var(--line);box-shadow:0 8px 22px rgba(26,35,74,.08)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand 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:var(--text);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:rgba(106,92,255,.08);color:var(--accent)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 14px 28px rgba(106,92,255,.22)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.section-box,.faq-item,.review,.article,.form-box,.timeline,.price-box,.compare,.network-box{background:var(--panel);border:1px solid rgba(217,224,239,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before{content:"";position:absolute;inset:auto -60px -70px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle, rgba(255,77,141,.25), transparent 62%)}
    .hero-main:after{content:"";position:absolute;inset:22px auto auto 22px;width:120px;height:120px;border-radius:28px;background:linear-gradient(135deg, rgba(106,92,255,.12), rgba(8,182,165,.10));transform:rotate(18deg)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(106,92,255,.08);color:var(--accent);font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0 0 20px;color:var(--muted);font-size:16px;max-width:58ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
    .point{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff, #f7f8ff);border:1px solid var(--line)}
    .point strong{display:block;font-size:20px}
    .point span{display:block;color:var(--muted);font-size:13px}
    .hero-side{padding:24px;background:linear-gradient(180deg,#fff 0%, #fbfbff 100%)}
    .side-stat{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .mini{padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(106,92,255,.08), rgba(255,77,141,.08));border:1px solid rgba(106,92,255,.12)}
    .mini strong{display:block;font-size:24px}
    .mini span{color:var(--muted);font-size:13px}
    .hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.1}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .card{padding:18px}
    .card h3{margin:12px 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted)}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg, rgba(106,92,255,.14), rgba(255,77,141,.14));color:var(--accent);font-weight:800}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .section-box{padding:22px}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f5f7ff);border:1px solid var(--line)}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:999px;align-items:center;justify-content:center;background:var(--accent);color:#fff;font-weight:800;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    table{width:100%;border-collapse:collapse;overflow:hidden}
    th,td{padding:14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f7ff;color:var(--text)}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:rgba(8,182,165,.1);color:#076d62;font-weight:700;font-size:12px}
    .compare-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .compare,.price-box,.network-box,.timeline{padding:22px}
    .score{font-size:42px;font-weight:900;line-height:1}
    .stars{color:#ffb300;font-size:22px;letter-spacing:2px}
    .faq-list{display:grid;gap:10px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px;background:#fff;border:0;color:var(--text);font-size:16px;font-weight:700;cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px;color:var(--muted)}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:16px}
    .reviews,.articles,.network,.pricing,.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review strong,.article strong{display:block;margin-bottom:8px}
    .review p,.article p{margin:0;color:var(--muted)}
    .article .meta{margin-top:12px;font-size:13px;color:var(--accent)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:28px 1fr;gap:12px;align-items:start}
    .dot{width:12px;height:12px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 0 0 6px rgba(106,92,255,.08)}
    .form-box form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    .field label{font-weight:700;font-size:14px}
    .field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:#fff;color:var(--text);font:inherit}
    .field textarea{min-height:120px;resize:vertical}
    .footer{padding:24px 0 30px;margin-top:8px;background:#f2f5fb;border-top:1px solid var(--line);color:var(--text)}
    .footer a{color:#24315a}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:14px}
    .footer small{color:var(--muted)}
    .float-contact{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-contact a,.backtop{width:52px;height:52px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:800;box-shadow:0 14px 28px rgba(106,92,255,.24);border:0}
    .backtop{opacity:0;pointer-events:none;transition:.25s}
    .backtop.show{opacity:1;pointer-events:auto}
    .floating-card{display:grid;gap:10px;align-content:start}
    .qrcode{width:140px;border-radius:18px;border:1px solid var(--line);padding:8px;background:#fff}
    .link-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .link-cloud a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text)}
    .mobile-panel{display:none}
    .scroll-appear{opacity:0;transform:translateY(16px);transition:.55s ease}
    .scroll-appear.in{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.compare-grid,.grid-4,.grid-3,.reviews,.articles,.network,.pricing,.contact-grid,.footer-grid{grid-template-columns:1fr 1fr}
      .steps{grid-template-columns:1fr 1fr 1fr}
    }
    @media (max-width: 768px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-panel{display:none;padding:0 0 16px}
      .mobile-panel.open{display:block}
      .mobile-panel a{display:block;padding:10px 0;color:var(--text);border-top:1px solid rgba(217,224,239,.65)}
      .hero-grid,.compare-grid,.grid-4,.grid-3,.reviews,.articles,.network,.pricing,.contact-grid,.footer-grid,.steps{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .hero-points{grid-template-columns:1fr}
      .side-stat{grid-template-columns:1fr 1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .table-wrap{font-size:14px}
    }