:root {
      --ink:#172033;
      --muted:#68738a;
      --paper:#fffaf5;
      --white:#fff;
      --line:#eadfd8;
      --pink:#f24786;
      --orange:#ff784d;
      --yellow:#ffc857;
      --blue:#315efb;
      --mint:#d9f4e8;
      --soft:#fff0e8;
      --shadow:0 18px 50px rgba(41,35,53,.1);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:min(1160px,calc(100% - 36px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:20;background:rgba(255,250,245,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;gap:12px;flex:none;font-weight:800;font-size:20px}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
    .nav-links a{padding:9px 10px;color:#4c566b;font-size:13px;transition:.2s}
    .nav-links a:hover{color:var(--pink)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:9px;padding:12px 18px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer;transition:.2s;box-shadow:0 8px 18px rgba(49,94,251,.2)}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(49,94,251,.28)}
    .menu-button{display:none;background:transparent;border:1px solid var(--line);border-radius:8px;padding:9px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;padding:92px 0 74px;background:linear-gradient(135deg,#fff6ed 0%,#ffe7ef 52%,#e5efff 100%);border-bottom:1px solid var(--line)}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none;border-radius:50%;filter:blur(1px)}
    .hero:before{width:300px;height:300px;background:rgba(242,71,134,.18);right:-90px;top:-90px}
    .hero:after{width:220px;height:220px;background:rgba(255,200,87,.2);left:-100px;bottom:-100px}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:58px;align-items:center}
    .eyebrow{display:inline-flex;padding:7px 12px;border-radius:30px;background:#172033;color:#fff;font-size:12px;font-weight:700;letter-spacing:1px}
    h1{font-size:clamp(38px,6vw,72px);line-height:1.08;margin:20px 0 22px;max-width:720px;letter-spacing:0}
    h2{font-size:clamp(28px,4vw,44px);line-height:1.16;margin:0 0 15px;letter-spacing:0}
    h3{font-size:20px;line-height:1.3;margin:0 0 10px}
    p{margin:0 0 14px;color:var(--muted)}
    .hero-copy{font-size:18px;max-width:650px}
    .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .button.alt{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
    .hero-panel{background:#172033;color:#fff;border-radius:24px;padding:26px;box-shadow:var(--shadow);transform:rotate(1deg)}
    .hero-panel h3{color:#fff}
    .panel-label{font-size:12px;color:#b9c4e3;text-transform:uppercase;letter-spacing:1px}
    .signal{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:20px 0}
    .signal div{padding:16px;background:#24304a;border-left:4px solid var(--yellow);border-radius:10px}
    .signal strong{display:block;font-size:27px;color:#fff}
    .signal span{font-size:12px;color:#c6cee0}
    .section{padding:82px 0}
    .section.tint{background:#fff3e9}
    .section.blue{background:#e9efff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-head p{max-width:600px}
    .kicker{color:var(--pink);font-size:13px;font-weight:800;letter-spacing:1.5px;margin-bottom:8px}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:35px}
    .stat{background:#fff;border:1px solid var(--line);padding:22px;border-radius:14px}
    .stat strong{display:block;font-size:32px;color:var(--blue);line-height:1.1}
    .stat span{color:var(--muted);font-size:13px}
    .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
    .accent-box{padding:28px;border-radius:18px;background:var(--blue);color:#fff;box-shadow:var(--shadow)}
    .accent-box p{color:#e7edff}
    .accent-box ul{padding-left:20px;margin:20px 0 0}
    .accent-box li{margin:9px 0}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service{background:#fff;border:1px solid var(--line);padding:22px;border-radius:14px;transition:.25s}
    .service:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f6a4b9}
    .service .icon{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:var(--soft);color:var(--pink);font-weight:800;margin-bottom:18px}
    .service p{font-size:14px}
    .tag-list{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}
    .tag{padding:8px 12px;border:1px solid #b9c8f7;background:#f4f6ff;color:#3150bd;border-radius:7px;font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--pink);margin-top:28px}
    .step{position:relative;padding:28px 18px 10px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-num{position:absolute;top:-18px;left:18px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--pink);color:#fff;font-weight:800}
    .step p{font-size:14px}
    .solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .solution{padding:25px;background:#fff;border-radius:14px;border:1px solid var(--line)}
    .solution strong{color:var(--orange)}
    .network{display:grid;grid-template-columns:1fr 1.5fr;gap:26px;align-items:start}
    .network-list{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
    .network-list span{background:#fff;border:1px solid var(--line);padding:13px 10px;text-align:center;border-radius:8px;font-size:13px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#172033;color:#fff;font-weight:700}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:700;color:var(--ink)}
    .rating{display:flex;align-items:center;gap:18px;background:#172033;color:#fff;padding:25px;border-radius:16px;margin-bottom:20px}
    .rating strong{font-size:40px;color:var(--yellow);line-height:1}
    .stars{color:var(--yellow);font-size:24px;letter-spacing:3px}
    .price-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .price-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .price-card.featured{background:var(--orange);color:#fff;border-color:var(--orange)}
    .price-card.featured p,.price-card.featured li{color:#fff}
    .price-card ul{padding-left:19px;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:14px;overflow:hidden}
    .case-media{aspect-ratio:16/9;background:#f8eee8;overflow:hidden}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:20px}
    .case-body small{color:var(--pink);font-weight:700}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{background:#fff;border:1px solid var(--line);padding:22px;border-radius:14px}
    .review p{font-size:14px;color:#48546b}
    .review strong{font-size:14px}
    .review span{display:block;color:var(--pink);font-size:12px;margin-top:5px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:17px 18px}
    summary{cursor:pointer;font-weight:700;padding-right:18px}
    details p{margin:12px 0 0;font-size:14px}
    .article-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
    .article{background:#fff;border:1px solid var(--line);padding:16px;border-radius:10px;min-height:100px;font-size:14px}
    .article:hover{border-color:var(--pink);color:var(--pink)}
    .form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px}
    .form-card{background:#fff;padding:28px;border-radius:16px;border:1px solid var(--line)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{font-size:13px;font-weight:700;display:block}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid #d9d5d1;border-radius:8px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
    textarea{min-height:130px;resize:vertical}
    .full{grid-column:1/-1}
    .contact-list{display:grid;gap:12px;margin-top:22px}
    .contact-item{padding:15px 18px;background:#fff;border-left:4px solid var(--orange);border-radius:8px}
    .contact-item strong{display:block}
    .contact-item span{font-size:14px;color:var(--muted)}
    .join{background:var(--blue);color:#fff;border-radius:20px;padding:35px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .join p{color:#e4eaff}
    .join .button{background:var(--yellow);color:#172033;box-shadow:none}
    .footer{background:#172033;color:#fff;padding:42px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:30px}
    .footer p,.footer a{color:#c8d0df;font-size:13px}
    .footer h3{font-size:16px;color:#fff}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-bottom{border-top:1px solid #38435c;margin-top:30px;padding-top:18px;color:#9ca8be;font-size:12px;display:flex;justify-content:space-between;gap:15px}
    .qr{width:110px;background:#fff;padding:6px;border-radius:8px}
    .float-contact{position:fixed;right:20px;bottom:20px;z-index:15;background:var(--pink);color:#fff;border-radius:50px;padding:13px 18px;font-weight:700;box-shadow:0 10px 25px rgba(242,71,134,.3)}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:var(--paper);padding:14px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
      .nav-links.open{display:grid;grid-template-columns:repeat(3,1fr)}
      .nav-links a{padding:10px}
      .menu-button{display:block}
      .nav-cta{display:none}
      .hero-grid,.intro-grid,.network,.form-layout{grid-template-columns:1fr}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .stats{grid-template-columns:repeat(2,1fr)}
      .workflow{grid-template-columns:repeat(3,1fr);border-top:0;gap:20px}
      .step{border:1px solid var(--line);border-radius:12px;background:#fff;padding-top:30px}
      .step-num{top:12px}
      .network-list{grid-template-columns:repeat(3,1fr)}
      .article-grid{grid-template-columns:repeat(3,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 26px,1160px)}
      .hero{padding:64px 0 55px}
      .section{padding:58px 0}
      h1{font-size:42px}
      .section-head{display:block}
      .service-grid,.solution-grid,.case-grid,.reviews,.faq-grid,.price-grid{grid-template-columns:1fr}
      .stats{gap:9px}
      .stat{padding:16px}
      .stat strong{font-size:25px}
      .workflow{grid-template-columns:1fr 1fr}
      .network-list{grid-template-columns:repeat(2,1fr)}
      .article-grid{grid-template-columns:1fr 1fr}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .join{display:block;padding:26px}
      .join .button{margin-top:12px}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{display:block}
      .float-contact{right:12px;bottom:12px}
    }