:root{
      --pink:#e92f70;
      --pink-deep:#b71959;
      --rose:#fff0f5;
      --ink:#262332;
      --muted:#6d6878;
      --line:#eadde5;
      --paper:#fffafd;
      --soft:#f8f4f7;
      --navy:#18263c;
      --mint:#d8f1e7;
      --orange:#ffb35c;
      --shadow:0 18px 50px rgba(74,28,61,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:min(1180px,calc(100% - 36px));margin:0 auto}
    .topline{background:var(--navy);color:#fff;font-size:13px;padding:8px 0}
    .topline .container{display:flex;justify-content:space-between;gap:16px;align-items:center}
    header{position:sticky;top:0;z-index:20;background:rgba(255,250,253,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(233,47,112,.12)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:11px;min-width:180px;font-weight:800;font-size:20px;color:var(--navy)}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:13px;color:#4d4653;padding:8px 9px;transition:.25s}
    .nav-links a:hover{color:var(--pink)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:999px;background:var(--pink);color:#fff;font-weight:700;padding:12px 20px;box-shadow:0 9px 22px rgba(233,47,112,.22);transition:transform .2s,box-shadow .2s,background .2s;cursor:pointer}
    .nav-cta{white-space:nowrap;font-size:13px}
    .button:hover,.nav-cta:hover{transform:translateY(-2px);background:var(--pink-deep);box-shadow:0 12px 28px rgba(233,47,112,.3)}
    .button.secondary{background:#fff;color:var(--pink-deep);border:1px solid #f0b6cb;box-shadow:none}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;color:var(--navy);font-size:20px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff5f8 0%,#fffafd 48%,#f2f9f6 100%);padding:78px 0 68px}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero:before{width:360px;height:360px;background:rgba(233,47,112,.10);right:-130px;top:-130px}
    .hero:after{width:220px;height:220px;background:rgba(255,179,92,.17);left:-90px;bottom:-90px}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--pink-deep);font-weight:800;font-size:14px;letter-spacing:.04em;margin-bottom:15px}
    .eyebrow:before{content:"";width:28px;height:3px;border-radius:3px;background:var(--pink)}
    h1,h2,h3{line-height:1.25;margin:0 0 16px;color:var(--navy)}
    h1{font-size:clamp(38px,6vw,68px);letter-spacing:0}
    h2{font-size:clamp(28px,4vw,42px)}
    h3{font-size:20px}
    .hero-copy{font-size:18px;color:var(--muted);max-width:650px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}
    .hero-note{font-size:13px;color:#756c78}
    .hero-panel{background:#fff;border:1px solid #f0dce5;border-radius:26px;padding:24px;box-shadow:var(--shadow);transform:rotate(1deg)}
    .panel-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:17px}
    .panel-head strong{color:var(--navy)}
    .status{color:#17825b;background:var(--mint);border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}
    .flow-row{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px dashed #eadfe5}
    .flow-row:last-child{border:0}
    .flow-icon{width:34px;height:34px;border-radius:10px;background:var(--rose);color:var(--pink);display:grid;place-items:center;font-weight:800}
    .flow-row span{font-size:14px;color:var(--muted)}
    .metrics{padding:22px 0;background:#fff;border-bottom:1px solid var(--line)}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .metric{padding:17px 20px;border-left:3px solid var(--pink)}
    .metric strong{display:block;font-size:28px;color:var(--navy)}
    .metric span{color:var(--muted);font-size:13px}
    section{padding:86px 0}
    .section-head{max-width:720px;margin-bottom:34px}
    .section-head p{color:var(--muted);margin:0}
    .kicker{font-size:13px;color:var(--pink-deep);font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}
    .about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
    .about-lead{font-size:22px;color:var(--navy);font-weight:700}
    .about-points{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .point{padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .point b{display:block;margin-bottom:6px;color:var(--navy)}
    .point p{margin:0;font-size:14px;color:var(--muted)}
    .service-section{background:#fff1f6}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{background:#fff;border:1px solid #f3d7e2;padding:22px;border-radius:16px;transition:.25s}
    .service-card:hover,.case:hover,.quote:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service-card .num{color:var(--pink);font-size:13px;font-weight:800}
    .service-card h3{font-size:18px;margin:8px 0}
    .service-card p{font-size:14px;color:var(--muted);margin:0}
    .wide-band{background:var(--navy);color:#fff}
    .wide-band h2,.wide-band h3{color:#fff}
    .wide-band p{color:#d9dce5}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:38px}
    .step{position:relative;padding:0 20px 0 0}
    .step:not(:last-child):after{content:"→";position:absolute;right:15px;top:12px;color:var(--pink);font-size:25px}
    .step-index{width:42px;height:42px;border-radius:12px;background:var(--pink);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:15px}
    .step p{font-size:14px;margin:0}
    .industry-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .industry{padding:25px;background:#fff;border:1px solid var(--line);border-radius:16px}
    .industry ul{padding-left:19px;margin:12px 0 0;color:var(--muted);font-size:14px}
    .tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
    .tag{background:#fff;border:1px solid #f2c2d3;border-radius:999px;padding:7px 12px;font-size:13px;color:var(--pink-deep)}
    .network{background:#fff8ef}
    .network-box{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:center}
    .network-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .network-item{background:#fff;padding:16px;border-radius:12px;border:1px solid #f1dfca}
    .network-item strong{display:block;color:var(--navy)}
    .network-item span{font-size:13px;color:var(--muted)}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.25s}
    .case-media{aspect-ratio:16/9;background:#f3e4eb;overflow:hidden}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:19px}
    .case-body p{font-size:14px;color:var(--muted);margin:0}
    .compare-wrap{display:grid;grid-template-columns:.7fr 1.3fr;gap:30px;align-items:start}
    .score{background:var(--pink);color:#fff;padding:30px;border-radius:20px}
    .score h3{color:#fff;margin-bottom:8px}
    .score strong{font-size:58px;line-height:1}
    .stars{letter-spacing:4px;color:#ffd477;font-size:24px;margin:10px 0}
    .table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:16px}
    table{width:100%;border-collapse:collapse;min-width:650px}
    th,td{text-align:left;padding:15px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#fff4f7;color:var(--navy)}
    td:last-child{color:var(--pink-deep);font-weight:700}
    .pricing{background:#f4f8f7}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-card{background:#fff;padding:25px;border:1px solid #d9ebe4;border-radius:16px}
    .price-card strong{font-size:28px;color:var(--navy)}
    .price-card p{font-size:14px;color:var(--muted)}
    .price-card.featured{border:2px solid var(--pink);position:relative}
    .price-card.featured:before{content:"更适合团队";position:absolute;right:18px;top:18px;background:var(--rose);color:var(--pink-deep);padding:4px 9px;border-radius:999px;font-size:12px}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{background:#fff;border:1px solid var(--line);padding:22px;border-radius:16px;transition:.25s}
    .quote p{font-size:15px;margin:0 0 18px}
    .quote footer{font-size:13px;color:var(--muted)}
    .quote footer strong{display:block;color:var(--navy)}
    .help-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}
    details{border-bottom:1px solid var(--line);padding:17px 0}
    summary{cursor:pointer;font-weight:700;color:var(--navy);list-style:none;padding-right:25px;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--pink);font-size:22px;top:-4px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin:12px 0 0}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:21px;background:#fff;border-top:4px solid var(--pink);box-shadow:0 8px 25px rgba(31,24,37,.06)}
    .article span{font-size:12px;color:var(--pink-deep)}
    .article h3{font-size:18px;margin:9px 0}
    .article p{font-size:14px;color:var(--muted);margin:0}
    .contact-section{background:linear-gradient(135deg,#fff0f5,#fff9f0)}
    .contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:38px;align-items:start}
    .contact-info{display:grid;gap:12px;margin-top:24px}
    .contact-item{background:#fff;border:1px solid var(--line);padding:15px 17px;border-radius:12px}
    .contact-item strong{display:block;color:var(--navy)}
    .contact-item span{font-size:14px;color:var(--muted)}
    form{background:#fff;border:1px solid var(--line);padding:25px;border-radius:18px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{font-size:13px;font-weight:700;color:var(--navy)}
    input,select,textarea{display:block;width:100%;margin-top:7px;padding:12px 13px;border:1px solid #dfd4dc;border-radius:10px;background:#fff;color:var(--ink);font:inherit;font-size:14px}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin:12px 0}
    footer{background:var(--navy);color:#fff;padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:30px}
    footer h3{color:#fff;font-size:18px}
    footer p,footer a{color:#cdd2dc;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px 16px}
    .copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:16px;color:#aeb6c2;font-size:12px}
    .float-contact{position:fixed;right:18px;bottom:20px;z-index:15}
    .float-contact button{border:0;background:var(--pink);color:#fff;border-radius:50%;width:56px;height:56px;font-size:22px;box-shadow:0 10px 28px rgba(233,47,112,.35);cursor:pointer}
    .qr-pop{display:none;position:absolute;right:0;bottom:68px;width:190px;background:#fff;padding:12px;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);color:var(--navy);font-size:13px;text-align:center}
    .qr-pop img{margin:8px auto 0;width:150px}
    .qr-pop.show{display:block}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1050px){
      .nav-links a{padding:7px 5px;font-size:12px}
      .service-grid{grid-template-columns:repeat(3,1fr)}
      .hero-grid{gap:30px}
    }
    @media(max-width:800px){
      .topline .container{justify-content:center;text-align:center}
      .topline span:last-child{display:none}
      .nav-wrap{min-height:68px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:18px;right:18px;top:68px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:9px 10px}
      .nav-cta{display:none}
      .hero{padding:58px 0 52px}
      .hero-grid,.about-grid,.network-box,.compare-wrap,.contact-grid,.help-grid{grid-template-columns:1fr}
      .hero-panel{transform:none}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      section{padding:62px 0}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .workflow{grid-template-columns:1fr;gap:22px}
      .step{padding:0 0 0 58px}
      .step-index{position:absolute;left:0;top:0}
      .step:not(:last-child):after{content:"↓";right:auto;left:13px;top:50px}
      .case-grid,.quote-grid,.articles{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      .container{width:min(100% - 28px,1180px)}
      h1{font-size:39px}
      .hero-copy{font-size:16px}
      .about-points,.industry-grid,.network-list,.price-grid,.case-grid,.quote-grid,.articles,.footer-grid{grid-template-columns:1fr}
      .service-grid{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .button{width:100%}
      .hero-actions{display:grid}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }