:root{--red:#bd1931;--red-dark:#85152a;--ink:#20242b;--muted:#626a73;--line:#e7e4e2;--paper:#fff;--soft:#fff7f5;--pink:#f8e8e8;--green:#1c6b55;--max:1160px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:82px}
    body{margin:0;background:#fff;color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    button,input,select,textarea{font:inherit}
    img{max-width:100%;height:auto}
    .container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;gap:10px;flex:none}
    .brand img{display:block;width:44px;max-height:44px;object-fit:contain}
    .brand strong{font-size:17px}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{padding:9px 10px;color:#41454b;font-size:13px;white-space:nowrap;transition:color .2s}
    .nav-links a:hover{color:var(--red)}
    .nav-cta,.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid var(--red);background:var(--red);color:#fff;padding:11px 18px;font-weight:700;border-radius:4px;transition:transform .2s,background .2s,box-shadow .2s}
    .nav-cta{white-space:nowrap;font-size:13px}
    .button:hover,.nav-cta:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 8px 18px #85152a24}
    .button.secondary{background:#fff;color:var(--red)}
    .button.secondary:hover{background:var(--soft)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 11px;border-radius:4px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(115deg,#fff8f6 0%,#fff 55%,#f8eeee 100%);border-bottom:1px solid #f0dfdf}
    .hero:after{content:"";position:absolute;width:420px;height:420px;border:1px solid #d89ba433;border-radius:50%;right:-130px;top:-180px;box-shadow:0 0 0 36px #d89ba415,0 0 0 72px #d89ba40c;pointer-events:none}
    .hero-inner{position:relative;z-index:1;min-height:510px;padding-block:78px 48px;display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
    .eyebrow{margin:0 0 15px;color:var(--red);font-size:13px;font-weight:800;letter-spacing:.08em}
    h1{max-width:700px;margin:0;font-size:clamp(38px,5vw,62px);line-height:1.14}
    .hero-copy{max-width:650px;margin:22px 0 26px;color:#50565e;font-size:17px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero-note{margin:16px 0 0;color:var(--muted);font-size:13px}
    .hero-panel{padding:25px 26px;background:#fff;border:1px solid #ecd6d8;box-shadow:12px 12px 0 #bd19310c;position:relative}
    .hero-panel h2{margin:0 0 17px;font-size:17px}
    .model-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .model-cloud span{padding:6px 9px;background:#fff5f3;border:1px solid #f0dedc;color:#4e3437;font-size:12px}
    .hero-panel p{margin:18px 0 0;color:var(--muted);font-size:13px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
    .metric{padding:22px 18px;border-right:1px solid var(--line)}
    .metric:last-child{border:0}
    .metric strong{display:block;color:var(--red);font-size:22px}
    .metric span{font-size:13px;color:var(--muted)}
    section.content-section{padding:76px 0}
    .section-head{max-width:720px;margin-bottom:32px}
    .section-head h2{margin:0 0 10px;font-size:clamp(26px,3vw,38px);line-height:1.25}
    .section-head p{margin:0;color:var(--muted)}
    .about-band{background:#fcf8f7}
    .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
    .about-grid p{margin:0 0 15px;color:#4e555d}
    .about-points{display:grid;grid-template-columns:1fr 1fr;gap:0 22px;border-top:1px solid var(--line)}
    .about-points div{padding:14px 0;border-bottom:1px solid var(--line)}
    .about-points strong{display:block;font-size:14px}
    .about-points span{color:var(--muted);font-size:13px}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service{padding:20px;border:1px solid var(--line);border-top:3px solid var(--red);background:#fff;transition:transform .22s,box-shadow .22s}
    .service:hover{transform:translateY(-4px);box-shadow:0 10px 24px #28202812}
    .service h3{margin:0 0 8px;font-size:17px}
    .service p{margin:0;color:var(--muted);font-size:14px}
    .service .tag{display:inline-block;margin-top:13px;color:var(--red);font-size:12px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .step{padding:22px 20px 24px;border-right:1px solid var(--line)}
    .step:last-child{border:0}
    .step b{display:block;margin-bottom:10px;color:var(--red);font-size:13px}
    .step h3{margin:0 0 6px;font-size:17px}
    .step p{margin:0;color:var(--muted);font-size:13px}
    .industry{background:#fff7f5}
    .industry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .industry-item{padding:17px;border-left:3px solid var(--red);background:#fff}
    .industry-item strong{display:block;margin-bottom:5px}
    .industry-item span{color:var(--muted);font-size:13px}
    .network-layout{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center}
    .network-layout p{color:var(--muted)}
    .network-tags{display:flex;flex-wrap:wrap;gap:9px}
    .network-tags span{padding:8px 12px;border:1px solid var(--line);background:#fff;font-size:13px}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .case{border:1px solid var(--line);background:#fff}
    .case img{display:block;width:100%;aspect-ratio:16/8;object-fit:cover;background:#f3eeee}
    .case-body{padding:19px}
    .case-body h3{margin:0 0 6px;font-size:17px}
    .case-body p{margin:0;color:var(--muted);font-size:14px}
    .case-square{display:grid;grid-template-columns:160px 1fr;align-items:center;gap:20px;margin-top:18px;padding:18px;border:1px solid var(--line)}
    .case-square img{width:160px;aspect-ratio:1;object-fit:cover}
    .case-square h3{margin:0 0 6px}
    .case-square p{margin:0;color:var(--muted);font-size:14px}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:19px;border:1px solid var(--line);background:#fff}
    .review p{margin:0 0 17px;color:#444b52;font-size:14px}
    .review strong{display:block;font-size:13px}
    .review span{color:var(--muted);font-size:12px}
    .compare{background:#fcf8f7}
    .scoreline{display:flex;align-items:center;gap:15px;margin-bottom:22px}
    .scoreline strong{font-size:32px;color:var(--red)}
    .stars{color:#d79722;letter-spacing:2px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff}
    table{width:100%;min-width:720px;border-collapse:collapse;text-align:left}
    th,td{padding:13px 15px;border-bottom:1px solid var(--line);font-size:13px}
    th{background:#f7eeee;color:#38393c}
    td:first-child{font-weight:700}
    .good{color:var(--green);font-weight:700}
    .price-note{padding:15px 18px;background:#fff4f1;border-left:3px solid var(--red);color:#555;font-size:13px;margin-top:15px}
    .match-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:start}
    .match-grid p{color:var(--muted)}
    form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700}
    input,select,textarea{width:100%;padding:11px 12px;border:1px solid #d9d6d4;background:#fff;border-radius:3px;color:var(--ink)}
    textarea{min-height:110px;resize:vertical}
    input:focus,select:focus,textarea:focus{outline:2px solid #bd193133;border-color:var(--red)}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line)}
    summary{position:relative;list-style:none;padding:17px 38px 17px 0;font-weight:700;cursor:pointer}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:5px;top:13px;color:var(--red);font-size:22px}
    details[open] summary:after{content:"−"}
    details p{margin:0;padding:0 34px 17px 0;color:var(--muted);font-size:14px}
    .articles{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
    .article{padding:16px;border:1px solid var(--line);min-height:106px;display:flex;flex-direction:column;justify-content:space-between;transition:border-color .2s}
    .article:hover{border-color:var(--red)}
    .article span{color:var(--muted);font-size:12px}
    .article strong{font-size:14px}
    .footer{background:#f6f1f0;color:#292b30;border-top:1px solid #e5d9d8}
    .footer-main{padding:32px 0;display:grid;grid-template-columns:1fr 1fr;gap:30px}
    .footer h2{font-size:18px;margin:0 0 10px}
    .footer p{margin:5px 0;color:#555b61;font-size:13px}
    .footer-links{display:flex;gap:9px 16px;flex-wrap:wrap;margin-top:11px}
    .footer-links a{font-size:13px;color:#4e5359;text-decoration:underline;text-decoration-color:#cbbfc0;text-underline-offset:3px}
    .qr{width:116px;display:block;margin-top:10px;border:1px solid var(--line);background:#fff}
    .copyright{padding:13px 0;border-top:1px solid #e2d9d8;color:#666;font-size:12px}
    .float-contact{position:fixed;z-index:15;right:18px;bottom:22px;display:flex;flex-direction:column;gap:8px}
    .float-contact a{display:block;padding:10px 13px;background:var(--red);color:#fff;font-size:12px;box-shadow:0 4px 14px #5c152322}
    .back-top{position:fixed;right:19px;bottom:118px;z-index:14;border:1px solid var(--line);background:#fff;color:var(--ink);width:40px;height:40px;display:none;cursor:pointer}
    .back-top.visible{display:block}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
    .reveal.in-view{opacity:1;transform:none}
    @media(max-width:980px){
      .nav{flex-wrap:wrap;padding-block:10px}
      .nav-links{order:3;width:100%;justify-content:flex-start}
      .nav-links a{padding:7px 8px}
      .nav-cta{margin-left:auto}
      .hero-inner{gap:30px}
      .industry-grid{grid-template-columns:repeat(2,1fr)}
      .articles{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:700px){
      .container{width:min(var(--max),calc(100% - 30px))}
      .nav{min-height:64px;flex-wrap:nowrap}
      .brand img{width:38px}
      .brand strong{font-size:15px}
      .menu-toggle{display:block}
      .nav-cta{padding:9px 11px;font-size:12px;margin-left:auto}
      .nav-links{display:none;position:absolute;left:0;right:0;top:63px;width:auto;padding:8px 15px 14px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 10px 18px #0000000c}
      .nav-links.open{display:grid;grid-template-columns:1fr 1fr}
      .nav-links a{padding:9px 8px}
      .hero-inner{min-height:auto;padding:58px 0 30px;grid-template-columns:1fr;gap:28px}
      h1{font-size:42px}
      .hero-copy{font-size:15px}
      .hero-panel{max-width:520px}
      .metrics{grid-template-columns:1fr 1fr}
      .metric{padding:15px;border-bottom:1px solid var(--line)}
      .metric:nth-child(2){border-right:0}
      .metric:nth-child(3),.metric:nth-child(4){border-bottom:0}
      section.content-section{padding:54px 0}
      .about-grid,.network-layout,.match-grid{grid-template-columns:1fr;gap:23px}
      .service-grid{grid-template-columns:1fr 1fr}
      .workflow{grid-template-columns:1fr 1fr}
      .step:nth-child(2){border-right:0}
      .step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .review-grid{grid-template-columns:1fr 1fr}
      .footer-main{grid-template-columns:1fr}
      .float-contact{right:10px;bottom:12px}
      .back-top{right:12px;bottom:105px}
    }
    @media(max-width:460px){
      .hero-actions .button{width:100%}
      .service-grid,.industry-grid,.review-grid{grid-template-columns:1fr}
      .case-grid{grid-template-columns:1fr}
      .case-square{grid-template-columns:100px 1fr;gap:13px;padding:12px}
      .case-square img{width:100px}
      .articles{grid-template-columns:1fr 1fr}
      .about-points{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .field.full{grid-column:auto}
      .metric strong{font-size:19px}
      .scoreline{align-items:flex-start;flex-direction:column;gap:2px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}
      .reveal{opacity:1;transform:none}
    }