:root{
      --ink:#172033;
      --muted:#657084;
      --line:#e6eaf2;
      --paper:#f7f9fc;
      --white:#fff;
      --blue:#315be8;
      --cyan:#13b9c8;
      --pink:#f25591;
      --orange:#ff9b4a;
      --dark:#17233f;
      --shadow:0 18px 50px rgba(37,57,105,.1);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background: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(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(230,234,242,.9);backdrop-filter:blur(14px)}
    .nav-bar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px;white-space:nowrap}
    .brand img{width:38px;height:38px;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:#48546a;padding:8px 9px;transition:color .2s}
    .nav-links a:hover{color:var(--blue)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .menu-toggle{display:none;border:0;background:#eef3ff;color:var(--blue);font-size:22px;border-radius:10px;width:42px;height:42px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:10px;padding:12px 19px;font-size:14px;font-weight:700;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(49,91,232,.2)}
    .btn-primary{background:var(--blue);color:#fff}
    .btn-secondary{background:#eaf0ff;color:var(--blue)}
    .btn-light{background:#fff;color:var(--blue)}
    .hero{position:relative;overflow:hidden;background:linear-gradient(125deg,#edf3ff 0%,#fff8fb 52%,#edfbfa 100%);padding:74px 0 62px}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);opacity:.55;pointer-events:none}
    .hero:before{width:330px;height:330px;background:#d9e5ff;right:-100px;top:-90px}
    .hero:after{width:220px;height:220px;background:#ffdbea;left:-90px;bottom:-90px}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:55px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1px}
    .eyebrow:before{content:"";width:28px;height:3px;background:linear-gradient(90deg,var(--blue),var(--pink));border-radius:3px}
    h1,h2,h3{line-height:1.25;margin:0 0 16px}
    h1{font-size:clamp(38px,5vw,64px);letter-spacing:0;margin-top:15px}
    h2{font-size:clamp(27px,3.2vw,40px)}
    h3{font-size:19px}
    .hero p{max-width:650px;color:#56647b;font-size:17px;margin:0 0 28px}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
    .hero-visual{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}
    .signal{background:rgba(255,255,255,.84);border:1px solid rgba(255,255,255,.8);border-radius:16px;padding:20px;box-shadow:var(--shadow);animation:float 5s ease-in-out infinite}
    .signal:nth-child(2){transform:translateY(24px);animation-delay:.5s}
    .signal:nth-child(3){animation-delay:1s}
    .signal:nth-child(4){transform:translateY(24px);animation-delay:1.5s}
    .signal strong{display:block;font-size:28px;color:var(--blue);line-height:1.2}
    .signal span{font-size:13px;color:var(--muted)}
    @keyframes float{50%{transform:translateY(-5px)}}
    .section{padding:86px 0}
    .section.alt{background:#fff}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-head p{max-width:580px;color:var(--muted);margin:0}
    .section-kicker{color:var(--pink);font-weight:800;font-size:13px;margin-bottom:9px}
    .intro-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:start}
    .intro-copy{font-size:17px;color:#536078}
    .metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric{padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .metric b{display:block;font-size:30px;color:var(--blue)}
    .metric span{font-size:13px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service{background:#fff;padding:23px;border:1px solid var(--line);border-radius:14px;transition:transform .25s,box-shadow .25s}
    .service:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service .icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#eaf0ff,#ffeaf3);color:var(--blue);font-size:20px;margin-bottom:18px}
    .service p,.case p,.review p,.step p{color:var(--muted);font-size:14px;margin:0}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:flow}
    .step{position:relative;padding:25px 18px 20px;background:#fff;border-top:3px solid var(--blue);border-radius:12px;box-shadow:0 8px 30px rgba(34,55,100,.06)}
    .step:before{counter-increment:flow;content:"0" counter(flow);display:block;font-size:26px;color:var(--pink);font-weight:800;margin-bottom:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 14px;border:1px solid #d9e2fb;border-radius:999px;background:#f5f8ff;color:#42537b;font-size:14px}
    .solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .solution{padding:24px;border-radius:16px;background:linear-gradient(145deg,#fff,#f5f8ff);border:1px solid #e2e8f7}
    .solution h3{color:#223b87}
    .comparison{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;min-width:760px;border-collapse:collapse}
    th,td{text-align:left;padding:17px 18px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#f3f6ff;color:#304b9d}
    tr:last-child td{border-bottom:0}
    .rating{display:flex;align-items:center;gap:20px;margin-bottom:22px}
    .rating strong{font-size:42px;color:var(--pink);line-height:1}
    .stars{color:#ffad22;letter-spacing:3px;font-size:20px}
    .case-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case,.review,.article{background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden}
    .case-media{aspect-ratio:16/9;overflow:hidden;background:#eef2fa}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body,.review-body,.article-body{padding:20px}
    .case-body small,.article small{color:var(--pink);font-weight:700}
    .review{padding:22px}
    .review-top{display:flex;justify-content:space-between;gap:12px;margin-bottom:12px}
    .review-top b{font-size:15px}
    .review-top span{color:#ffab21;font-size:13px}
    .article a{color:var(--blue);font-weight:700}
    .article p{font-size:14px;color:var(--muted);margin:8px 0 0}
    .price-band{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch}
    .price-panel{padding:28px;border-radius:18px;color:#fff;background:linear-gradient(135deg,#243f9b,#315be8 54%,#13b9c8)}
    .price-panel h2{max-width:500px}
    .price-panel p{color:#e3ebff}
    .price-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:20px 0}
    .price-list span{padding:11px 12px;border:1px solid rgba(255,255,255,.25);border-radius:8px;color:#f3f6ff;font-size:13px}
    .network{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .network-box{background:#fff;border:1px solid var(--line);padding:25px;border-radius:15px}
    .network-box ul{padding-left:20px;margin:10px 0 0;color:var(--muted)}
    .faq{max-width:900px;margin:0 auto}
    details{background:#fff;border-bottom:1px solid var(--line);padding:19px 4px}
    summary{cursor:pointer;font-weight:700;list-style:none;padding-right:28px;position:relative}
    summary:after{content:"+";position:absolute;right:5px;color:var(--blue);font-size:22px;top:-4px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin:12px 35px 2px 0}
    .form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:25px;align-items:start}
    .contact-panel{background:var(--dark);color:#fff;padding:30px;border-radius:18px}
    .contact-panel p{color:#d6def2}
    .contact-line{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:14px}
    .contact-line:last-child{border:0}
    .contact-line a{color:#a9c0ff}
    .form-box{background:#fff;padding:25px;border:1px solid var(--line);border-radius:18px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    label{font-size:13px;color:#526078;font-weight:700}
    input,select,textarea{width:100%;font:inherit;border:1px solid #dce2ee;border-radius:9px;padding:12px 13px;margin-top:6px;outline:0;background:#fbfcff;color:var(--ink)}
    input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(49,91,232,.1)}
    .full{grid-column:1/-1}
    textarea{min-height:125px;resize:vertical}
    .form-note{font-size:12px;color:var(--muted);margin:12px 0 0}
    .footer{background:#111b31;color:#dbe3f2;padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}
    .footer h3{color:#fff;font-size:16px}
    .footer p,.footer a{color:#aebbd3;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 15px}
    .copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;font-size:12px;color:#8e9bb5}
    .float-actions{position:fixed;right:20px;bottom:20px;z-index:15;display:flex;flex-direction:column;gap:9px}
    .float-actions a{width:45px;height:45px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(49,91,232,.3);font-size:19px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1050px){
      .nav-links a{padding:8px 6px;font-size:12px}
      .service-grid{grid-template-columns:repeat(3,1fr)}
      .process{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:780px){
      .container{width:min(100% - 28px,620px)}
      .nav-bar{min-height:66px}
      .menu-toggle{display:block}
      .nav-actions{display:none}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:70px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:10px 12px;border-bottom:1px solid #eef1f6}
      .nav-links a:last-child{border-bottom:0}
      .hero{padding:55px 0 48px}
      .hero-grid,.intro-layout,.price-band,.network,.form-layout{grid-template-columns:1fr}
      .hero-visual{margin-top:12px}
      .section{padding:62px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .service-grid,.solution-grid,.case-grid,.review-grid,.article-grid{grid-template-columns:1fr 1fr}
      .process{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      h1{font-size:39px}
      .hero-visual{gap:9px}
      .signal{padding:15px}
      .signal strong{font-size:23px}
      .service-grid,.solution-grid,.case-grid,.review-grid,.article-grid,.process,.form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .footer-grid{grid-template-columns:1fr}
      .float-actions{right:13px;bottom:13px}
    }