:root{--bg:#f6f8fc;--panel:#ffffff;--panel2:#f2f6ff;--line:#dce4f2;--text:#152033;--muted:#5f6b85;--brand:#316bff;--brand2:#7b4dff;--accent:#19c6d1;--glow:0 18px 60px rgba(49,107,255,.16);--radius:20px}
    *{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;background:radial-gradient(circle at top left,#eef4ff 0,#f7f9fd 35%,#f5f7fb 100%);color:var(--text)}
    a{color:var(--brand);text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(246,248,252,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,228,242,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
    .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;padding:5px;box-shadow:var(--glow)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .navlinks{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .navlinks a,.navlinks button{border:1px solid var(--line);background:#fff;color:var(--text);padding:9px 12px;border-radius:999px;font-size:14px;cursor:pointer;transition:.25s ease}
    .navlinks a:hover,.navlinks button:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(49,107,255,.12);border-color:#bcd0ff}
    .menu-btn{display:none}
    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:18px;align-items:stretch}
    .hero-main{background:linear-gradient(135deg,rgba(49,107,255,.12),rgba(123,77,255,.08) 40%,rgba(25,198,209,.08));border:1px solid rgba(120,145,210,.22);border-radius:28px;padding:34px;position:relative;overflow:hidden;box-shadow:var(--glow)}
    .hero-main:before,.hero-main:after{content:"";position:absolute;inset:auto auto 16px -20px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(25,198,209,.22),transparent 65%);filter:blur(8px);animation:float 8s ease-in-out infinite}
    .hero-main:after{inset:18px -40px auto auto;width:220px;height:220px;background:radial-gradient(circle,rgba(123,77,255,.18),transparent 68%);animation-duration:10s}
    @keyframes float{50%{transform:translateY(-10px)}}
    .eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.7);border:1px solid rgba(120,145,210,.22);font-size:13px;color:#29406d}
    h1{font-size:clamp(30px,4vw,54px);line-height:1.08;margin:18px 0 14px;max-width:12ch}
    .lead{font-size:17px;line-height:1.75;color:#283a59;max-width:62ch;margin:0 0 22px}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:8px 0 0}
    .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:.25s ease}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 28px rgba(49,107,255,.28)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-1px)}
    .hero-side{display:grid;gap:14px}
    .mini-card,.panel{background:rgba(255,255,255,.82);border:1px solid rgba(220,228,242,.9);border-radius:22px;box-shadow:0 14px 40px rgba(20,39,80,.08)}
    .mini-card{padding:18px}
    .mini-card h3,.section-title h2{margin:0 0 10px}
    .mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .stat b{display:block;font-size:26px;margin-bottom:4px}
    .stat span{color:var(--muted);font-size:13px}
    section{padding:16px 0 4px}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin:10px 0 16px}
    .section-title p{margin:0;color:var(--muted);max-width:66ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 30px rgba(20,39,80,.06);transition:.25s ease}
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(49,107,255,.12)}
    .card h3{margin:0 0 10px;font-size:18px}.card p{margin:0;color:var(--muted);line-height:1.7}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}.tag{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#2b3d5d;font-size:13px}
    .media{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .media .card{overflow:hidden}.media .ai-page-image{width:100%;border-radius:16px;margin:0 0 14px}
    .timeline{display:grid;gap:12px}.step{display:flex;gap:14px;align-items:flex-start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:20px}
    .num{flex:0 0 34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800}
    .compare,.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:22px}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7faff;color:#20314d}
    .accent{color:#0b7b96;font-weight:700}
    .faq{display:grid;gap:12px}.faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 18px;overflow:hidden}
    .faq summary{list-style:none;cursor:pointer;padding:16px 0;font-weight:700}
    .faq summary::-webkit-details-marker{display:none}.faq .ans{padding:0 0 16px;color:var(--muted);line-height:1.75}
    .review{display:grid;gap:12px}.quote{padding:18px;border-left:4px solid var(--brand);background:linear-gradient(180deg,#fff,#f7f9ff);border-radius:16px;color:#35455f}
    .review .meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
    .articles{display:grid;gap:12px}.article-list{display:grid;gap:10px}.article-list a{display:flex;justify-content:space-between;gap:12px;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:16px;color:var(--text)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field{display:grid;gap:8px}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #cfd9eb;background:#fff;color:var(--text);font:inherit}
    textarea{min-height:120px;resize:vertical}.submit{width:100%}
    .footer{margin-top:22px;padding:24px 0 30px;background:#fff;border-top:1px solid var(--line);color:#23324d}
    .footer a{color:#2457d6}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .float-tools{position:fixed;right:14px;bottom:14px;display:grid;gap:10px;z-index:60}
    .float-tools a,.backtop{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:none;box-shadow:0 12px 26px rgba(49,107,255,.28);cursor:pointer}
    .kefu{position:fixed;left:14px;bottom:14px;z-index:60;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:0 12px 26px rgba(20,39,80,.12);width:min(220px,calc(100vw - 28px))}
    .kefu img{border-radius:12px}.reveal{opacity:0;transform:translateY(16px);transition:.6s ease}.reveal.in{opacity:1;transform:none}
    @media (max-width: 960px){.hero-grid,.grid-3,.grid-4,.media,.footer-grid{grid-template-columns:1fr}.navlinks{display:none}.menu-btn{display:inline-flex}.nav.open .navlinks{display:flex;position:absolute;left:16px;right:16px;top:64px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--glow)}.nav{position:relative;align-items:center}.form-grid{grid-template-columns:1fr}.kefu{max-width:180px}}