:root{
      --ink:#18243a;
      --muted:#617087;
      --blue:#2563eb;
      --cyan:#12b8c9;
      --orange:#ff7a45;
      --yellow:#ffc857;
      --line:#dfe7f1;
      --soft:#f4f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(34,70,120,.11);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7fbff;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% - 40px));margin:0 auto}
    .topbar{background:#13243f;color:#e9f1fc;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .topbar a{color:#bfeaf0}
    header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(223,231,241,.9);backdrop-filter:blur(14px)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;min-width:180px}
    .ai-page-logo{width:136px}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:14px;font-weight:600;padding:8px 10px;color:#44546b;transition:.25s}
    .nav-links a:hover{color:var(--blue)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:11px 18px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(37,99,235,.25)}
    .menu-toggle{display:none;background:#eef4fb;border:0;border-radius:9px;padding:10px;color:var(--ink);font-size:20px}
    .hero{position:relative;overflow:hidden;padding:76px 0 58px;background:linear-gradient(125deg,#eff8ff 0%,#fff8ed 51%,#eefdf8 100%)}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero:before{width:360px;height:360px;right:-130px;top:-140px;background:rgba(18,184,201,.18)}
    .hero:after{width:260px;height:260px;left:-120px;bottom:-130px;background:rgba(255,200,87,.24)}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(290px,.82fr);gap:54px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#0a7e91;font-size:14px;font-weight:800;letter-spacing:1px}
    .eyebrow:before{content:"";width:28px;height:3px;border-radius:3px;background:var(--orange)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.13;letter-spacing:0;margin:18px 0 22px;max-width:680px}
    .hero h1 span{color:var(--blue)}
    .hero-copy{font-size:18px;color:#56657b;max-width:650px;margin:0 0 28px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .button.secondary{background:#fff;color:var(--blue);border:1px solid #b9cbea}
    .hero-panel{padding:24px;border:1px solid rgba(255,255,255,.9);background:rgba(255,255,255,.78);border-radius:22px;box-shadow:var(--shadow)}
    .panel-title{font-size:17px;font-weight:800;margin:0 0 16px}
    .signal-list{display:grid;gap:12px}
    .signal{display:flex;align-items:flex-start;gap:12px;padding:13px 0;border-bottom:1px solid #e5edf5}
    .signal:last-child{border-bottom:0}
    .signal-mark{display:grid;place-items:center;width:29px;height:29px;border-radius:8px;background:#e7f8f4;color:#087c70;font-weight:800;flex:none}
    .signal strong{display:block;font-size:15px}
    .signal small{display:block;color:var(--muted);font-size:13px}
    .metrics{margin-top:34px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .metric{background:#fff;border:1px solid var(--line);padding:17px;border-radius:14px}
    .metric strong{display:block;font-size:27px;color:var(--blue);line-height:1.2}
    .metric span{font-size:13px;color:var(--muted)}
    section{padding:82px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:0 0 8px}
    .section-head p{color:var(--muted);max-width:650px;margin:0}
    .kicker{color:var(--orange);font-size:13px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase}
    .about{background:#fff}
    .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
    .about-lead{font-size:22px;line-height:1.55;margin:0 0 18px;font-weight:700}
    .about-text{color:var(--muted);margin:0}
    .capability-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .capability{padding:18px;background:var(--soft);border-left:4px solid var(--cyan);border-radius:8px}
    .capability strong{display:block;margin-bottom:3px}
    .capability span{font-size:14px;color:var(--muted)}
    .services{background:linear-gradient(180deg,#f7fbff 0%,#eef8fa 100%)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:.25s}
    .service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#a9dbe2}
    .service-card h3{font-size:18px;margin:0 0 8px}
    .service-card p{font-size:14px;color:var(--muted);margin:0}
    .service-icon{font-size:24px;color:var(--orange);margin-bottom:8px}
    .wide-band{background:#13243f;color:#fff}
    .wide-band .section-head p{color:#b7c8df}
    .wide-band .kicker{color:#61d5d6}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid rgba(255,255,255,.22)}
    .step{position:relative;padding:24px 20px 0;border-right:1px solid rgba(255,255,255,.2)}
    .step:last-child{border-right:0}
    .step-num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--orange);color:#fff;font-weight:800;margin-bottom:13px}
    .step h3{font-size:17px;margin:0 0 5px}
    .step p{font-size:13px;color:#b7c8df;margin:0}
    .solution-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:start}
    .solution-list{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    .solution-list div{padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .solution-list strong{display:block;font-size:16px}
    .solution-list span{color:var(--muted);font-size:13px}
    .network{padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px}
    .network h3{margin:0 0 12px}
    .tags{display:flex;flex-wrap:wrap;gap:8px}
    .tag{padding:7px 11px;border-radius:7px;background:#edf4ff;color:#315ca0;font-size:13px}
    .tag:nth-child(3n){background:#fff0e8;color:#a74a25}
    .tag:nth-child(4n){background:#e8faf3;color:#14745d}
    .showcase{background:#fff}
    .visual-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .visual-grid figure{margin:0;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .visual-grid img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .visual-grid figcaption{padding:13px 16px;color:var(--muted);font-size:14px}
    .visual-grid figure:last-child img{aspect-ratio:1/1}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
    th{background:#edf5ff;color:#245aa4;font-weight:800}
    tr:last-child td{border-bottom:0}
    .rating{display:flex;align-items:center;gap:18px;padding:20px 0}
    .rating strong{font-size:34px;color:var(--orange)}
    .stars{color:#f0a728;font-size:23px;letter-spacing:3px}
    .reviews{background:#f1f7fc}
    .review-grid{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{margin:0 0 16px;color:#53647a;font-size:14px}
    .review footer{color:var(--ink);font-size:13px;font-weight:800}
    .review footer span{color:var(--muted);font-weight:400;margin-left:7px}
    .pricing{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:stretch}
    .price-note{background:linear-gradient(135deg,#2364e8,#12aeb5);color:#fff;border-radius:16px;padding:28px}
    .price-note h3{font-size:26px;margin:0 0 10px}
    .price-note p{color:#e6f8ff;margin:0 0 22px}
    .price-note .button{background:#fff;color:#1555bc}
    .price-list{display:grid;gap:10px}
    .price-item{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:15px 18px;border:1px solid var(--line);border-radius:10px;background:#fff}
    .price-item span{color:var(--muted);font-size:14px}
    .price-item strong{color:#1262ba}
    .faq{background:#fff}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}
    details{border-bottom:1px solid var(--line);padding:8px 0}
    summary{cursor:pointer;padding:10px 0;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:14px}
    summary:after{content:"+";color:var(--blue);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 12px;color:var(--muted);font-size:14px}
    .articles{background:#f5f9fd}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:20px;background:#fff;border:1px solid var(--line);border-radius:13px}
    .article small{color:var(--orange);font-weight:700}
    .article h3{font-size:17px;margin:8px 0}
    .article p{font-size:14px;color:var(--muted);margin:0 0 13px}
    .text-link{color:var(--blue);font-weight:700;font-size:14px}
    .contact{background:linear-gradient(120deg,#fff8ef,#effaff)}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;align-items:start}
    .contact-info h2{font-size:38px;line-height:1.2;margin:8px 0 15px}
    .contact-info p{color:var(--muted)}
    .contact-list{display:grid;gap:8px;color:#43546b;font-size:14px}
    .contact-form{background:#fff;padding:24px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    label{display:grid;gap:6px;font-size:13px;font-weight:700;color:#40516a}
    label.full{grid-column:1/-1}
    input,select,textarea{width:100%;border:1px solid #cbd8e6;border-radius:8px;padding:11px 12px;font:inherit;color:var(--ink);background:#fbfdff}
    textarea{min-height:110px;resize:vertical}
    .form-submit{margin-top:16px}
    .qr{display:flex;gap:14px;align-items:center;margin-top:20px}
    .qr img{width:82px;border-radius:8px;border:1px solid var(--line)}
    footer{background:#13243f;color:#dbe8f7;padding:42px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:30px}
    footer h3{color:#fff;font-size:17px;margin:0 0 12px}
    footer p,footer li{color:#aebfd5;font-size:13px;margin:0}
    footer ul{list-style:none;padding:0;margin:0;display:grid;gap:7px}
    .friend-links{display:flex;flex-wrap:wrap;gap:8px}
    .friend-links a{color:#c9f2ef;font-size:13px}
    .copyright{border-top:1px solid rgba(255,255,255,.16);margin-top:30px;padding-top:16px;color:#9cafc5;font-size:12px;display:flex;justify-content:space-between;gap:16px}
    .float-contact{position:fixed;right:20px;bottom:22px;z-index:15;background:var(--orange);color:#fff;border-radius:50px;padding:12px 17px;box-shadow:0 12px 24px rgba(255,122,69,.3);font-weight:800;font-size:14px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1000px){
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:70px;background:#fff;padding:12px;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px}
      .nav-links.open{display:grid;grid-template-columns:repeat(3,1fr)}
      .nav-links a{text-align:center}
      .menu-toggle{display:block}
      .nav-cta{display:none}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .workflow{grid-template-columns:repeat(3,1fr);gap:20px;border-top:0}
      .step{border-right:0;border-top:1px solid rgba(255,255,255,.22);padding-top:20px}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{font-size:12px}
      .topbar .container span{display:none}
      .hero{padding:54px 0 42px}
      .hero-grid,.about-grid,.solution-grid,.pricing,.contact-grid{grid-template-columns:1fr;gap:26px}
      h1{font-size:42px}
      .hero-copy{font-size:16px}
      .metrics{grid-template-columns:repeat(2,1fr)}
      section{padding:58px 0}
      .section-head{display:block}
      .section-head p{margin-top:10px}
      .capability-list,.solution-list,.faq-grid{grid-template-columns:1fr}
      .service-grid,.review-grid,.article-grid{grid-template-columns:1fr}
      .visual-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr 1fr}
      .form-grid{grid-template-columns:1fr}
      label.full{grid-column:auto}
      .footer-grid{grid-template-columns:1fr;gap:22px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:6px}
      .nav-links.open{grid-template-columns:1fr 1fr}
      .float-contact{right:14px;bottom:14px}
    }