:root{
      --ink:#172332;
      --muted:#5d6a76;
      --paper:#f7faf8;
      --white:#fff;
      --line:#dce8e4;
      --cyan:#00b8b0;
      --lime:#b7ee37;
      --violet:#6a5cff;
      --orange:#ff8d3a;
      --deep:#12232c;
      --shadow:0 18px 45px rgba(20,55,57,.11);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"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% - 40px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,250,248,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .nav-wrap{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand strong{font-size:20px;letter-spacing:0;color:var(--ink)}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:13px;color:#465762;padding:8px 9px;transition:.25s}
    .nav-links a:hover{color:var(--cyan)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s}
    .nav-cta{background:var(--ink);color:#fff;padding:10px 16px;border-radius:9px;margin-left:10px;font-size:13px}
    .button{padding:13px 21px;border-radius:10px;background:var(--cyan);color:#fff;box-shadow:0 10px 20px rgba(0,184,176,.2)}
    .button:hover,.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(19,39,44,.18)}
    .button.alt{background:var(--lime);color:#172332}
    .button.ghost{background:transparent;border:1px solid var(--cyan);color:var(--cyan);box-shadow:none}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:20px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:var(--deep);color:#fff;padding:92px 0 78px}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none}
    .hero:before{width:280px;height:280px;border:1px solid rgba(183,238,55,.38);right:8%;top:22px;border-radius:50%;box-shadow:0 0 0 28px rgba(0,184,176,.07),0 0 0 58px rgba(183,238,55,.04)}
    .hero:after{width:8px;height:120px;background:var(--lime);right:18%;bottom:20px;transform:rotate(34deg);box-shadow:28px 15px 0 var(--cyan)}
    .hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:55px;align-items:center;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--lime);font-size:13px;font-weight:700;letter-spacing:1px}
    .eyebrow:before{content:"";width:26px;height:3px;background:var(--lime)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.1;margin:18px 0 22px;letter-spacing:0}
    .hero p{max-width:650px;color:#d8e6e2;font-size:18px;margin:0 0 29px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px}
    .hero .button.ghost{color:#e4fff5;border-color:#7cdcd1}
    .signal-board{border-left:2px solid var(--lime);padding-left:22px}
    .signal-board h2{font-size:22px;margin:0 0 18px;color:#fff}
    .signal-list{display:grid;gap:12px}
    .signal-item{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.17);padding-bottom:11px;color:#d8e6e2}
    .signal-item b{color:var(--lime);font-size:18px}
    .section{padding:82px 0}
    .section.tint{background:#edf7f3}
    .section.dark{background:var(--deep);color:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:30px}
    .section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.2;margin:9px 0 0}
    .section-head p{max-width:560px;color:var(--muted);margin:0}
    .dark .section-head p{color:#bdcfca}
    .kicker{font-size:13px;color:var(--cyan);font-weight:800;letter-spacing:1px}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:-31px;position:relative;z-index:2}
    .stat{background:var(--white);padding:23px;border:1px solid var(--line);border-top:4px solid var(--cyan);box-shadow:var(--shadow)}
    .stat strong{display:block;font-size:31px;color:var(--ink);line-height:1.2}
    .stat span{font-size:13px;color:var(--muted)}
    .intro-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:55px;align-items:start}
    .intro-grid h3{font-size:28px;line-height:1.35;margin:0 0 16px}
    .intro-grid p{color:var(--muted)}
    .proof-line{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:24px}
    .proof-line div{border-left:3px solid var(--lime);padding-left:14px}
    .proof-line b{display:block;font-size:19px}
    .proof-line span{font-size:13px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .service{background:var(--white);padding:23px;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
    .service:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service .num{color:var(--violet);font-weight:800;font-size:14px}
    .service h3{font-size:19px;margin:10px 0 7px}
    .service p{font-size:14px;color:var(--muted);margin:0}
    .tag-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}
    .tag{padding:7px 12px;border:1px solid #b9d9d2;border-radius:99px;background:#f8fffb;font-size:13px;color:#31545a}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--lime)}
    .step{padding:23px 15px 10px;border-right:1px solid var(--line);position:relative}
    .step:last-child{border-right:0}
    .step b{display:block;color:var(--cyan);font-size:13px;margin-bottom:12px}
    .step h3{font-size:18px;margin:0 0 7px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .case-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:18px}
    .case{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
    .case-media{aspect-ratio:16/8;overflow:hidden;background:#e6f0ed}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:20px}
    .case-body h3{margin:0 0 7px;font-size:20px}
    .case-body p{margin:0;color:var(--muted);font-size:14px}
    .compare-wrap{display:grid;grid-template-columns:250px 1fr;gap:30px;align-items:start}
    .score{background:var(--ink);color:#fff;padding:27px;border-left:5px solid var(--lime)}
    .score strong{display:block;font-size:48px;line-height:1;color:var(--lime)}
    .score span{color:#d3e2dd;font-size:14px}
    .table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line)}
    table{border-collapse:collapse;width:100%;min-width:680px}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#e7f5f0;color:#23464b}
    td:first-child{font-weight:700}
    .stars{color:var(--orange);letter-spacing:2px;font-size:20px}
    .network{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .network-card{padding:25px;background:var(--white);border-left:4px solid var(--violet);border-radius:12px}
    .network-card h3{margin:0 0 8px}
    .network-card p{margin:0;color:var(--muted);font-size:14px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{background:#fff;padding:22px;border:1px solid var(--line);transition:.25s}
    .review p{margin:0 0 16px;color:#43535c;font-size:14px}
    .review footer{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
    .review b{color:var(--ink)}
    .match-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
    .timeline{border-left:2px solid var(--cyan);padding-left:22px;display:grid;gap:22px}
    .timeline h3{margin:0;font-size:18px}
    .timeline p{margin:3px 0 0;color:var(--muted);font-size:14px}
    form{display:grid;gap:13px}
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    input,select,textarea{font:inherit;width:100%;border:1px solid #cbded9;background:#fff;border-radius:8px;padding:12px 13px;color:var(--ink);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,184,176,.12)}
    .form-note{font-size:12px;color:var(--muted);margin:0}
    .faq-list{display:grid;gap:10px;max-width:920px}
    details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 18px}
    summary{cursor:pointer;list-style:none;padding:17px 28px 17px 0;font-weight:700;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--cyan);font-size:23px;top:12px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;border-top:1px solid var(--line);padding:13px 0 6px;margin:0 0 8px}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{background:#fff;border-top:4px solid var(--orange);padding:22px;border-radius:10px}
    .article small{color:var(--orange);font-weight:700}
    .article h3{font-size:18px;margin:10px 0}
    .article p{color:var(--muted);font-size:14px;margin:0 0 15px}
    .article a{color:var(--cyan);font-weight:700;font-size:14px}
    .contact-strip{display:flex;justify-content:space-between;align-items:center;gap:25px;background:var(--lime);padding:30px 34px;border-radius:14px}
    .contact-strip h2{margin:0;font-size:28px;line-height:1.25}
    .contact-strip p{margin:7px 0 0;color:#334c43}
    .footer{background:#10222c;color:#d8e6e2;padding:48px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:35px}
    .footer h3{color:#fff;margin:0 0 12px}
    .footer p{font-size:14px;color:#b8ccc7;margin:6px 0}
    .footer a{color:#d8e6e2;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:9px 16px}
    .qr{width:108px;border-radius:8px;margin-top:8px}
    .copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:18px;color:#9bb1ae;font-size:12px}
    .float-contact{position:fixed;right:18px;bottom:20px;z-index:15;background:var(--violet);color:#fff;padding:12px 15px;border-radius:99px;box-shadow:0 10px 25px rgba(66,55,170,.28);font-weight:700;font-size:13px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s 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(2,1fr)}
      .stats{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,600px)}
      .nav-wrap{min-height:66px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:72px;background:#fff;padding:12px;border:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{width:50%;padding:9px 7px}
      .nav-cta{margin:7px 0 0;width:100%;text-align:center}
      .hero{padding:68px 0 58px}
      .hero-grid,.intro-grid,.compare-wrap,.match-grid{grid-template-columns:1fr;gap:30px}
      .hero p{font-size:16px}
      .section{padding:60px 0}
      .section-head{display:block}
      .section-head p{margin-top:14px}
      .process{grid-template-columns:1fr;border-top:0;border-left:2px solid var(--lime)}
      .step{border-right:0;border-bottom:1px solid var(--line);padding:16px 16px 16px 20px}
      .case-grid,.reviews,.article-grid,.network{grid-template-columns:1fr}
      .contact-strip{display:block;padding:25px}
      .contact-strip .button{margin-top:18px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      h1{font-size:42px}
    }
    @media(prefers-reduced-motion:reduce){
      *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }