:root{
      --red:#e9343f;
      --red-dark:#b91f2c;
      --ink:#241f20;
      --muted:#6e6668;
      --cream:#fff8f4;
      --paper:#ffffff;
      --line:#eadbd6;
      --gold:#e9a44b;
      --teal:#167d79;
      --shadow:0 18px 45px rgba(97,35,37,.11);
      --container:min(1180px,calc(100% - 36px));
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:var(--container);margin:0 auto}
    .topbar{background:#231c1d;color:#fff;font-size:13px}
    .topbar-inner{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .topbar a{color:#ffd9cf}
    header{position:sticky;top:0;z-index:20;background:rgba(255,248,244,.96);border-bottom:1px solid var(--line);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:12px;flex:none}
    .ai-page-logo{width:132px}
    .brand-copy{font-size:12px;color:var(--muted);border-left:1px solid var(--line);padding-left:12px;line-height:1.35}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:14px;padding:9px 10px;color:#463d3e;border-radius:7px}
    .nav-links a:hover{background:#ffe5de;color:var(--red-dark)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;font-weight:700;border-radius:7px;padding:12px 19px;transition:.25s ease}
    .nav-cta,.button-primary{background:var(--red);color:#fff;box-shadow:0 8px 18px rgba(233,52,63,.22)}
    .nav-cta:hover,.button-primary:hover{background:var(--red-dark);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 11px;font-size:20px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:#fff0ea;padding:78px 0 66px;border-bottom:1px solid var(--line)}
    .hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(233,52,63,.18);transform:rotate(16deg);pointer-events:none}
    .hero:before{width:430px;height:430px;right:-120px;top:-160px;border-radius:42px}
    .hero:after{width:250px;height:250px;left:-120px;bottom:-150px;border-radius:50%}
    .hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--red-dark);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:16px}
    .eyebrow:before{content:"";width:25px;height:3px;background:var(--red);border-radius:2px}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.1;letter-spacing:0;margin-bottom:22px;max-width:700px}
    h2{font-size:clamp(27px,3vw,42px);line-height:1.2;margin-bottom:15px}
    h3{line-height:1.3}
    .hero-copy{font-size:18px;color:#5d5152;max-width:650px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 31px}
    .button-secondary{background:#fff;border:1px solid #dfc7c2;color:var(--ink)}
    .button-secondary:hover{border-color:var(--red);color:var(--red)}
    .hero-notes{display:flex;flex-wrap:wrap;gap:10px;color:#684c4e;font-size:13px}
    .hero-notes span{padding:6px 10px;border:1px solid #edc7bf;background:rgba(255,255,255,.62);border-radius:5px}
    .signal-board{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .signal-card{background:#fff;border:1px solid #f0d7d1;padding:22px;border-radius:9px;box-shadow:var(--shadow);animation:rise .7s both}
    .signal-card:nth-child(2){margin-top:24px;animation-delay:.12s}
    .signal-card:nth-child(3){animation-delay:.2s}
    .signal-card:nth-child(4){margin-top:24px;animation-delay:.28s}
    .signal-card strong{display:block;font-size:30px;color:var(--red);line-height:1.1;margin-bottom:5px}
    .signal-card small{color:var(--muted)}
    .section{padding:82px 0}
    .section-alt{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px}
    .section-head p{max-width:560px;color:var(--muted);margin-bottom:0}
    .section-kicker{font-size:13px;font-weight:bold;color:var(--red);letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start}
    .intro-panel{padding:31px;background:#fff;border-left:5px solid var(--red);box-shadow:var(--shadow)}
    .intro-panel p{color:#594e50}
    .check-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;padding:0;margin:22px 0 0;list-style:none}
    .check-list li:before{content:"✓";color:var(--red);font-weight:bold;margin-right:9px}
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .feature-card{background:#fff;border:1px solid var(--line);padding:23px;border-radius:8px;transition:.25s}
    .feature-card:hover,.review-card:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#e9aaa2}
    .feature-card h3{font-size:19px;margin:13px 0 8px}
    .feature-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .feature-mark{width:38px;height:38px;display:grid;place-items:center;background:#ffe2db;color:var(--red);font-weight:bold;border-radius:50%}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .service-card{background:#fff;padding:20px;border-top:3px solid var(--red);border-radius:6px;box-shadow:0 7px 22px rgba(74,35,30,.06)}
    .service-card h3{font-size:17px;margin:0 0 7px}
    .service-card p{font-size:13px;color:var(--muted);margin:0}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:steps}
    .step{position:relative;padding:22px 18px;border-top:2px solid #efb4aa}
    .step:before{counter-increment:steps;content:"0" counter(steps);display:block;color:var(--red);font-size:14px;font-weight:bold;margin-bottom:16px}
    .step:not(:last-child):after{content:"→";position:absolute;right:-8px;top:18px;color:#d49c96;font-size:24px}
    .step h3{font-size:17px;margin-bottom:7px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .industry{padding:24px;background:#2a2223;color:#fff;border-radius:8px;min-height:150px;position:relative;overflow:hidden}
    .industry:nth-child(2n){background:var(--red)}
    .industry h3{margin:0 0 8px;font-size:19px}
    .industry p{color:#f7deda;font-size:14px;margin:0}
    .industry:nth-child(2n) p{color:#fff0eb}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-item{background:#fff;padding:22px;border-bottom:3px solid var(--gold)}
    .timeline-item b{color:var(--red);font-size:13px}
    .timeline-item h3{font-size:18px;margin:8px 0}
    .timeline-item p{font-size:13px;color:var(--muted);margin:0}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
    .tag-cloud span{padding:7px 12px;border:1px solid #e8c7bf;background:#fff;color:#694f50;border-radius:4px;font-size:13px}
    .media-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .media-large{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .media-large img,.media-small img{width:100%;border-radius:7px;border:1px solid var(--line)}
    .media-small{background:#fff;padding:14px;border:1px solid var(--line)}
    .media-small p{font-size:14px;color:var(--muted);margin:12px 0 0}
    .comparison{overflow-x:auto;background:#fff;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{text-align:left;padding:16px;border-bottom:1px solid #f0e1dd;font-size:14px}
    th{background:#fff0eb;color:#613f40}
    td:first-child{font-weight:bold}
    .rating{display:flex;align-items:center;gap:20px;margin-bottom:24px;flex-wrap:wrap}
    .rating strong{font-size:42px;color:var(--red)}
    .stars{color:#e79b25;letter-spacing:3px;font-size:21px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .review-card{background:#fff;padding:22px;border:1px solid var(--line);transition:.25s}
    .review-card p{font-size:14px;color:#544a4b}
    .review-card footer{font-size:13px;color:var(--red-dark);font-weight:bold}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .case-card{background:#fff;border:1px solid var(--line);overflow:hidden;transition:.25s}
    .case-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .case-content{padding:18px}
    .case-content h3{margin:0 0 7px;font-size:18px}
    .case-content p{font-size:13px;color:var(--muted);margin:0}
    .price-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .price-box{background:#2a2223;color:#fff;padding:30px;border-radius:8px}
    .price-box h3{font-size:24px;margin-bottom:10px}
    .price-box p{color:#e9ceca}
    .price-list{list-style:none;padding:0;margin:20px 0 0}
    .price-list li{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.15);display:flex;justify-content:space-between;gap:10px}
    .price-list b{color:#ffd38d}
    .articles{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .article-link{background:#fff;padding:18px;border:1px solid var(--line);min-height:130px}
    .article-link b{display:block;color:var(--red);font-size:13px;margin-bottom:8px}
    .article-link span{font-size:14px;font-weight:bold}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px}
    details{background:#fff;border:1px solid var(--line);padding:17px 18px}
    summary{font-weight:bold;cursor:pointer;padding-right:20px}
    details p{color:var(--muted);font-size:14px;margin:12px 0 0}
    .contact-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:32px;align-items:start}
    .contact-info{background:#2a2223;color:#fff;padding:30px;border-radius:8px}
    .contact-info h2{color:#fff}
    .contact-info p{color:#e8cfcb}
    .contact-info dl{margin:25px 0 0}
    .contact-info dt{font-size:12px;color:#e9a49c;margin-top:14px}
    .contact-info dd{margin:2px 0 0}
    .contact-info img{width:150px;margin-top:18px;border-radius:5px}
    form{background:#fff;padding:28px;border:1px solid var(--line)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{display:block;font-size:13px;font-weight:bold;color:#4b4142}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid #decac5;border-radius:5px;background:#fffdfc;padding:12px;font:inherit;color:var(--ink)}
    textarea{min-height:125px;resize:vertical}
    .full{grid-column:1/-1}
    footer{background:#231c1d;color:#f8e7e3;padding:48px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
    footer h3{color:#fff;margin:0 0 13px;font-size:17px}
    footer p,footer li,footer a{font-size:13px;color:#cfb9b6}
    footer ul{list-style:none;padding:0;margin:0;display:grid;gap:7px}
    footer a:hover{color:#fff}
    .footer-bottom{border-top:1px solid #493b3b;margin-top:34px;padding-top:18px;font-size:12px;color:#a88f8d;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
    .float-service{position:fixed;right:18px;bottom:18px;z-index:15;background:var(--red);color:#fff;padding:12px 15px;border-radius:6px;box-shadow:0 8px 22px rgba(95,24,27,.25);font-size:13px}
    .to-top{position:fixed;right:18px;bottom:72px;width:38px;height:38px;border:0;border-radius:50%;background:#fff;color:var(--red);box-shadow:var(--shadow);cursor:pointer;opacity:0;pointer-events:none;transition:.2s}
    .to-top.show{opacity:1;pointer-events:auto}
    .reveal{opacity:0;transform:translateY(18px);transition:.65s ease}
    .reveal.visible{opacity:1;transform:none}
    @keyframes rise{from{opacity:0;transform:translateY(15px)}to{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)}
      .articles{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:780px){
      :root{--container:min(100% - 28px,680px)}
      .topbar-inner{padding:7px 0;align-items:flex-start}
      .topbar-inner span:last-child{display:none}
      .nav-wrap{min-height:64px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:64px;background:#fff8f4;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);align-items:stretch}
      .nav-links.open{display:grid}
      .nav-links a{padding:10px 12px}
      .nav-cta{display:none}
      .hero{padding:55px 0 48px}
      .hero-grid,.intro-grid,.media-grid,.price-layout,.contact-layout{grid-template-columns:1fr;gap:28px}
      h1{font-size:42px}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .feature-grid,.industry-grid,.case-grid,.reviews{grid-template-columns:1fr 1fr}
      .service-grid{grid-template-columns:1fr 1fr}
      .process{grid-template-columns:1fr 1fr;gap:14px}
      .step:not(:last-child):after{display:none}
      .timeline{grid-template-columns:1fr 1fr}
      .articles{grid-template-columns:1fr 1fr}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:500px){
      .brand-copy{display:none}
      .hero-actions .button{width:100%}
      .signal-board,.feature-grid,.industry-grid,.case-grid,.reviews,.service-grid,.timeline,.articles,.footer-grid{grid-template-columns:1fr}
      .signal-card:nth-child(2),.signal-card:nth-child(4){margin-top:0}
      .check-list{grid-template-columns:1fr}
      .process{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      h1{font-size:38px}
      .hero-copy{font-size:16px}
      .media-large{grid-template-columns:1fr}
    }