:root{--bg:#f7f8fc;--panel:#ffffff;--panel2:#f1f5ff;--text:#172033;--muted:#5f6b85;--line:#d9e0f2;--pri:#4c6fff;--pri2:#7a5cff;--acc:#20c997;--shadow:0 18px 50px rgba(40,60,120,.12);--radius:22px}
    *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,rgba(76,111,255,.12),transparent 28%),radial-gradient(circle at right top,rgba(122,92,255,.12),transparent 22%),var(--bg);color:var(--text)}
    a{color:var(--pri);text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(247,248,252,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,224,242,.7)}
    .topbar{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:4px;box-shadow:0 8px 24px rgba(76,111,255,.14)}
    .brand h1,.brand .site-title{margin:0;font-size:18px;line-height:1.1}.brand small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
    nav{display:flex;align-items:center;gap:14px}.nav-links{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{padding:8px 10px;border-radius:999px;color:var(--text);font-size:14px}.nav-links a:hover{background:#eef3ff;color:var(--pri)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s ease;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;box-shadow:0 14px 30px rgba(76,111,255,.24)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(40,60,120,.12)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:34px 0 20px}
    .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch}
    .hero-card,.panel{background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(255,255,255,.88));border:1px solid rgba(217,224,242,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
    .hero-card:before{width:240px;height:240px;background:radial-gradient(circle,rgba(76,111,255,.18),transparent 70%);right:-70px;top:-80px}
    .hero-card:after{width:180px;height:180px;background:radial-gradient(circle,rgba(32,201,151,.16),transparent 70%);left:-60px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef4ff;color:#3550d6;font-weight:700;font-size:13px}
    .hero h2{margin:18px 0 14px;font-size:clamp(32px,4vw,54px);line-height:1.05;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{padding:14px;border-radius:18px;background:#f7f9ff;border:1px solid #e4ebff}
    .point strong{display:block;font-size:18px}.point span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .hero-side{display:grid;gap:16px}
    .metric-grid,.card-grid,.step-grid,.review-grid,.article-grid,.network-grid,.pricing-grid,.tag-cloud{display:grid;gap:14px}
    .metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin-top:18px}
    .metric,.feature,.step,.review,.article,.faq-item,.compare,.contact-card,.panel{background:rgba(255,255,255,.92);border:1px solid rgba(217,224,242,.92);border-radius:20px}
    .metric{padding:18px}.metric b{display:block;font-size:24px}.metric span{display:block;color:var(--muted);margin-top:6px;font-size:14px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}.section-head h3{margin:0;font-size:28px}.section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
    .feature{padding:20px}.feature h4,.step h4,.review h4,.article h4,.contact-card h4{margin:0 0 10px;font-size:18px}
    .feature p,.step p,.review p,.article p,.contact-card p{margin:0;color:var(--muted);line-height:1.75}
    .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.chip{padding:7px 10px;border-radius:999px;background:#f2f6ff;color:#3550d6;font-size:13px}
    .step-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
    .step{padding:18px;position:relative}.step .num{width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:20px;border:1px solid rgba(217,224,242,.9);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:840px} th,td{padding:14px 16px;border-bottom:1px solid #edf1fb;text-align:left;vertical-align:top} th{background:#f5f7ff;color:#2a3550;font-size:14px} td{color:var(--text);font-size:14px;line-height:1.7}
    .rating{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef9f4;color:#0f7f5f;font-weight:700}
    .timeline{display:grid;gap:12px}.timeline .item{display:grid;grid-template-columns:92px 1fr;gap:14px;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline .item b{color:#3550d6}
    .faq-item{overflow:hidden}.faq-q{width:100%;padding:18px 20px;background:transparent;border:0;color:var(--text);font-size:16px;font-weight:700;text-align:left;display:flex;justify-content:space-between;gap:12px;cursor:pointer}.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}.faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
    .review{padding:20px}.review .role{color:var(--pri);font-weight:700;font-size:13px;margin-bottom:8px}
    .article-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
    .article{padding:18px}
    .tag-cloud{grid-template-columns:repeat(4,minmax(0,1fr))}.tags{display:flex;flex-wrap:wrap;gap:10px}.tags a{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text)}
    .contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:16px;align-items:start}
    .contact-card{padding:22px}.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.form .full{grid-column:1/-1}
    input,select,textarea{width:100%;padding:13px 14px;border:1px solid #cfd8ef;border-radius:14px;background:#fff;color:var(--text);font:inherit;outline:none} textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7a91ff;box-shadow:0 0 0 4px rgba(76,111,255,.12)}
    .footer{margin-top:10px;padding:20px 0 26px;border-top:1px solid rgba(217,224,242,.85);background:#f3f6ff;color:#20304c}
    .footer a{color:#2948cc}.footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px}.footer small{color:#596784}
    .float-tools{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}.float-tools a,.float-tools button{width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:0 12px 28px rgba(40,60,120,.16);display:grid;place-items:center;cursor:pointer}
    .qr{display:flex;align-items:center;gap:14px}.qr img{width:90px;height:90px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .media-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .media-row img{border-radius:18px;border:1px solid var(--line);background:#fff}
    .service-pills{display:flex;flex-wrap:wrap;gap:10px}.service-pills span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #dfe7fb}
    .hidden-mobile{display:block}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .scroll-reveal.in{opacity:1;transform:none}
    @media (max-width: 1024px){.hero-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}.metric-grid,.card-grid,.step-grid,.review-grid,.article-grid,.tag-cloud{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-points{grid-template-columns:1fr}.hidden-mobile{display:none}.nav-links{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}.nav-links.open{display:flex;flex-direction:column;align-items:stretch}.menu-toggle{display:inline-flex}.topbar{position:relative}}
    @media (max-width: 720px){.container{width:min(100% - 22px,1180px)} .hero-card{padding:22px}.hero h2{font-size:30px}.section-head{flex-direction:column;align-items:start}.metric-grid,.card-grid,.step-grid,.review-grid,.article-grid,.tag-cloud,.form{grid-template-columns:1fr}.timeline .item{grid-template-columns:1fr}.media-row{grid-template-columns:1fr}.nav-cta .btn-secondary{display:none}}