:root{
      --ink:#12223b;
      --muted:#5b6b82;
      --blue:#2169f5;
      --blue-dark:#1250c7;
      --cyan:#1cc7c9;
      --orange:#ff8b3d;
      --yellow:#ffd66b;
      --paper:#f5f9ff;
      --line:#dbe6f3;
      --white:#fff;
      --shadow:0 18px 50px rgba(31,76,139,.12);
      --radius:18px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:
        radial-gradient(circle at 6% 8%,rgba(33,105,245,.08),transparent 24rem),
        radial-gradient(circle at 94% 35%,rgba(28,199,201,.08),transparent 28rem),
        var(--paper);
      font-family:Inter,"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(var(--container),calc(100% - 40px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:20;
      background:rgba(255,255,255,.92);
      border-bottom:1px solid rgba(219,230,243,.9);
      backdrop-filter:blur(16px)
    }
    .header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;flex:none}
    .ai-page-logo{width:150px}
    .nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
    .nav-links a{padding:9px 13px;color:#41536d;font-size:14px;white-space:nowrap;border-radius:8px}
    .nav-links a:hover{background:#edf4ff;color:var(--blue)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:9px;padding:8px 10px;font-size:18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 19px;border-radius:10px;
      font-weight:700;border:1px solid transparent;cursor:pointer;
      transition:.25s ease;white-space:nowrap
    }
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(33,105,245,.22)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cfe0fa}
    .btn-light:hover{border-color:var(--blue);transform:translateY(-2px)}
    .hero{position:relative;overflow:hidden;padding:88px 0 70px;background:linear-gradient(135deg,#eef7ff 0%,#fff 54%,#ecfffb 100%)}
    .hero:after{content:"";position:absolute;width:340px;height:340px;border:42px solid rgba(255,214,107,.34);border-radius:50%;right:-110px;top:-100px}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:60px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:14px;font-weight:800;letter-spacing:1px}
    .eyebrow:before{content:"";width:28px;height:3px;background:var(--orange);border-radius:3px}
    h1,h2,h3{line-height:1.2;margin:0 0 18px;letter-spacing:0}
    h1{font-size:clamp(42px,6vw,72px);max-width:620px}
    h2{font-size:clamp(28px,4vw,42px)}
    h3{font-size:20px}
    .hero-copy{max-width:650px;color:var(--muted);font-size:18px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0}
    .hero-note{font-size:13px;color:#6f7d91}
    .signal-board{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .signal{padding:22px;background:#fff;border:1px solid #dce9f7;border-radius:16px;box-shadow:var(--shadow);animation:floatIn .7s both}
    .signal:nth-child(2){margin-top:24px;animation-delay:.1s}.signal:nth-child(3){animation-delay:.2s}.signal:nth-child(4){margin-top:24px;animation-delay:.3s}
    .signal strong{display:block;font-size:25px;color:var(--blue);margin-bottom:3px}
    .signal span{color:var(--muted);font-size:14px}
    @keyframes floatIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
    .section{padding:90px 0}
    .section.alt{background:rgba(255,255,255,.58)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head p{max-width:610px;color:var(--muted);margin:0}
    .kicker{color:var(--orange);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:1.4px}
    .intro-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start}
    .intro-text{font-size:18px;color:#40526d}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .feature{padding:18px 20px;background:#fff;border-left:4px solid var(--cyan);box-shadow:0 8px 22px rgba(31,76,139,.07);border-radius:10px}
    .feature strong{display:block;margin-bottom:4px}.feature span{color:var(--muted);font-size:14px}
    .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 8px 24px rgba(31,76,139,.06);transition:.25s ease}
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#e7f1ff;color:var(--blue);font-weight:900;margin-bottom:18px}
    .card p{color:var(--muted);font-size:14px;margin:0}
    .tag-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
    .tag{padding:6px 11px;border-radius:99px;background:#edf5ff;color:#2c62b5;font-size:13px}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid #c9dcf6}
    .step{position:relative;padding:28px 22px 10px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}.step:before{content:"";position:absolute;top:-9px;left:22px;width:15px;height:15px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px #fff}
    .step-number{font-size:13px;color:var(--blue);font-weight:800}.step p{color:var(--muted);font-size:14px}
    .solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .solution{padding:24px;background:linear-gradient(135deg,#fff,#f0f8ff);border:1px solid #d8e7f6;border-radius:14px}
    .solution h3{color:#164cae}.solution p{color:var(--muted);font-size:14px;margin:0}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 24px rgba(31,76,139,.06)}
    table{width:100%;min-width:760px;border-collapse:collapse}
    th,td{text-align:left;padding:17px 19px;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#edf5ff;color:#174da8;font-size:14px}.good{color:#0d927b;font-weight:700}
    .rating{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:24px}
    .rating-score{font-size:46px;font-weight:900;color:var(--blue);line-height:1}.stars{color:#ff9c24;letter-spacing:4px;font-size:23px}
    .rating p{color:var(--muted);margin:0}
    .match-grid{display:grid;grid-template-columns:1fr .85fr;gap:28px;align-items:start}
    .price-panel{background:#122d55;color:#fff;padding:32px;border-radius:18px;position:relative;overflow:hidden}
    .price-panel:after{content:"";position:absolute;right:-30px;bottom:-60px;width:180px;height:180px;border:28px solid rgba(28,199,201,.35);border-radius:50%}
    .price-panel h3{position:relative;z-index:1}.price-panel p{position:relative;z-index:1;color:#dbe9ff}
    .price-row{position:relative;z-index:1;display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.18);padding:14px 0;font-size:14px}
    form{display:grid;gap:15px;background:#fff;padding:28px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{font-size:14px;font-weight:700;color:#30445f}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid #cddbeb;border-radius:9px;padding:12px 13px;font:inherit;color:var(--ink);background:#fbfdff}
    textarea{min-height:120px;resize:vertical}.full{grid-column:1/-1}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .review p{color:#40526d;margin:0 0 18px}.review footer{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px}
    .case-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .case{min-height:210px;padding:28px;border-radius:18px;background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;justify-content:end;box-shadow:0 8px 24px rgba(31,76,139,.06)}
    .case.featured{background:linear-gradient(135deg,#2169f5,#1cbec1);color:#fff}.case.featured p{color:#e7fbff}
    .case p{color:var(--muted);font-size:14px;margin:0}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{display:block;padding:20px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .article small{color:var(--orange)}.article strong{display:block;margin-top:8px}.article:hover strong{color:var(--blue)}
    .faq-list{display:grid;gap:10px;max-width:900px}
    details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 19px}
    summary{cursor:pointer;font-weight:700;padding:17px 0;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{color:var(--muted);font-size:14px;margin:0 0 18px}
    .service-map{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .service-map span{padding:15px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:10px;color:#36516f;font-size:14px}
    .footer{background:#102946;color:#d8e6f8;padding:44px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:30px}
    .footer h3{font-size:16px;color:#fff}.footer p,.footer a{font-size:13px;color:#b7cbe3}.footer a:hover{color:#fff}
    .footer-links{display:grid;gap:7px}.qr{width:104px;border-radius:8px;margin-top:10px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:30px;padding-top:17px;font-size:12px;color:#99b0cc}
    .float-tools{position:fixed;right:18px;bottom:20px;z-index:15;display:grid;gap:9px}
    .float-tools a{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(33,105,245,.28);font-size:13px;font-weight:700}
    .reveal{opacity:0;transform:translateY(18px);transition:.65s ease}.reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:70px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);justify-content:flex-start}
      .nav-links.open{display:flex}.menu-toggle{display:block}.header-inner>.btn{display:none}
      .hero-grid,.intro-layout,.match-grid,.case-grid{grid-template-columns:1fr}
      .cards,.reviews{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(var(--container),calc(100% - 28px))}.section{padding:62px 0}.hero{padding:62px 0 50px}
      h1{font-size:44px}.section-head{display:block}.section-head p{margin-top:15px}
      .cards,.reviews,.article-grid,.solution-grid,.feature-list,.form-grid{grid-template-columns:1fr}
      .process{grid-template-columns:1fr;border-top:0}.step{border-right:0;border-top:1px solid var(--line);padding-left:28px}.step:before{top:-8px;left:0}
      .service-map{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.footer{padding-bottom:20px}
      .hero-actions .btn{width:100%}.signal-board{gap:10px}.signal{padding:17px}.signal strong{font-size:21px}
    }
    @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}