:root{
      --ink:#172033;
      --muted:#657086;
      --paper:#fffaf6;
      --white:#ffffff;
      --orange:#ff6b35;
      --pink:#f43f7a;
      --blue:#1769e0;
      --cyan:#27b5b0;
      --yellow:#ffc857;
      --line:#eadfd8;
      --shadow:0 18px 45px rgba(38,39,62,.09);
      --radius:18px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"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% - 36px));margin:0 auto}
    .topbar{background:var(--ink);color:#fff;font-size:13px}
    .topbar .container{display:flex;justify-content:space-between;gap:18px;padding:8px 0}
    header{position:sticky;top:0;z-index:20;background:rgba(255,250,246,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(234,223,216,.8)}
    .nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;flex:0 0 auto}
    .ai-page-logo{width:142px;max-height:42px;object-fit:contain}
    .nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
    .nav-links a{font-size:13px;padding:8px 9px;color:#39445a;white-space:nowrap}
    .nav-links a:hover{color:var(--orange)}
    .nav-action{background:var(--orange);color:#fff!important;border-radius:999px!important;padding:9px 15px!important;margin-left:8px;box-shadow:0 8px 20px rgba(255,107,53,.25)}
    .menu-toggle{display:none;border:0;background:var(--ink);color:#fff;border-radius:8px;padding:9px 12px;font-size:18px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(125deg,#fff4e7 0%,#ffe8ed 48%,#e9f5ff 100%);padding:92px 0 82px}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none}
    .hero:before{width:290px;height:290px;right:-90px;top:-100px;background:var(--yellow);border-radius:44% 56% 62% 38%;transform:rotate(25deg);opacity:.75}
    .hero:after{width:220px;height:220px;left:-100px;bottom:-110px;background:var(--cyan);border-radius:50%;opacity:.45}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;color:var(--orange);font-weight:700;letter-spacing:.08em;font-size:13px;text-transform:uppercase}
    .eyebrow:before,.section-kicker:before{content:"";width:28px;height:4px;background:var(--pink);margin-right:10px;border-radius:5px}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.12;letter-spacing:0;margin:18px 0 22px;max-width:760px}
    .hero-copy{font-size:19px;color:#49566b;max-width:650px;margin:0 0 28px}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid transparent;border-radius:10px;padding:12px 20px;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(23,32,51,.13)}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-dark{background:var(--ink);color:#fff}
    .btn-light{background:#fff;color:var(--ink);border-color:var(--line)}
    .hero-panel{background:rgba(255,255,255,.76);border:1px solid rgba(255,255,255,.9);box-shadow:var(--shadow);padding:26px;border-radius:24px}
    .hero-panel h2{font-size:22px;margin:0 0 17px}
    .signal{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .signal-item{background:#fff;padding:16px;border-left:4px solid var(--blue);border-radius:10px}
    .signal-item strong{display:block;font-size:25px;line-height:1.2}
    .signal-item span{color:var(--muted);font-size:13px}
    .section{padding:82px 0}
    .section.alt{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
    .section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:10px 0 0}
    .section-head p{max-width:540px;color:var(--muted);margin:0}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:stretch}
    .intro-copy{font-size:18px;color:#4c596d}
    .marker-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:25px}
    .marker{padding:17px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .marker b{display:block;color:var(--blue);font-size:22px}
    .accent-panel{background:var(--ink);color:#fff;border-radius:24px;padding:30px;position:relative;overflow:hidden}
    .accent-panel:after{content:"";position:absolute;width:180px;height:180px;right:-60px;bottom:-70px;background:var(--pink);border-radius:50%;opacity:.75}
    .accent-panel h3{position:relative;z-index:1;font-size:28px;margin:0 0 18px}
    .accent-panel p{position:relative;z-index:1;color:#d6dbe5}
    .tag-row{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px;margin-top:25px}
    .tag{border:1px solid rgba(255,255,255,.3);padding:6px 10px;border-radius:999px;font-size:13px}
    .cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s ease}
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#ffc5b1}
    .card h3{font-size:19px;margin:0 0 9px}
    .card p{color:var(--muted);font-size:14px;margin:0}
    .icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#fff0e9;color:var(--orange);font-weight:800;font-size:20px;margin-bottom:15px}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .service-card{padding:25px;background:#fff;border-top:5px solid var(--orange);border-radius:4px 4px 16px 16px;box-shadow:0 8px 24px rgba(38,39,62,.05)}
    .service-card:nth-child(3n+2){border-color:var(--blue)}
    .service-card:nth-child(3n){border-color:var(--pink)}
    .service-card h3{margin:0 0 8px}
    .service-card p{color:var(--muted);font-size:14px;margin:0}
    .service-card small{display:block;color:var(--orange);font-weight:700;margin-bottom:8px}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--yellow)}
    .step{padding:24px 18px 10px;border-right:1px solid var(--line);position:relative}
    .step:last-child{border-right:0}
    .step-num{width:34px;height:34px;background:var(--pink);color:#fff;border-radius:50%;display:grid;place-items:center;font-weight:800;margin-bottom:16px}
    .step h3{font-size:17px;margin:0 0 7px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .solution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .solution{background:#fff;padding:24px;border-radius:14px;border:1px solid var(--line)}
    .solution h3{margin:0 0 8px}
    .solution p{margin:0;color:var(--muted);font-size:14px}
    .network{display:flex;flex-wrap:wrap;gap:10px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:18px}
    .network span{padding:9px 14px;background:#f1f6ff;color:#214d9d;border-radius:8px;font-size:14px}
    .media-strip{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;margin-top:26px}
    .media-strip figure{margin:0;border-radius:16px;overflow:hidden;background:#fff;border:1px solid var(--line)}
    .media-strip img{width:100%;aspect-ratio:16/8;object-fit:cover}
    .media-strip figcaption{padding:12px 15px;font-size:13px;color:var(--muted)}
    .rating-box{display:flex;align-items:center;gap:20px;background:var(--ink);color:#fff;border-radius:20px;padding:24px;margin-bottom:22px}
    .rating-number{font-size:48px;line-height:1;color:var(--yellow);font-weight:800}
    .stars{color:var(--yellow);font-size:25px;letter-spacing:3px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:16px}
    table{width:100%;min-width:760px;border-collapse:collapse}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#fff1e9;color:#742d18}
    td:first-child{font-weight:700}
    .yes{color:#078b68;font-weight:700}
    .testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .quote{background:#fff;border:1px solid var(--line);padding:22px;border-radius:16px}
    .quote p{color:#4e5b70;margin:0 0 17px;font-size:14px}
    .quote footer{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:13px;font-weight:700}
    .avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case{background:#fff;border-radius:16px;padding:24px;border-bottom:5px solid var(--cyan);box-shadow:0 8px 24px rgba(38,39,62,.05)}
    .case:nth-child(2){border-color:var(--orange)}
    .case:nth-child(3){border-color:var(--pink)}
    .case h3{margin:0 0 8px}
    .case p{font-size:14px;color:var(--muted);margin:0}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .article-list a{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:10px}
    .article-list a:hover{border-color:var(--orange);color:var(--orange)}
    .article-list span{font-size:12px;color:var(--muted);white-space:nowrap}
    .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 18px}
    summary{cursor:pointer;padding:17px 0;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";float:right;color:var(--orange);font-size:20px}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 17px;color:var(--muted);font-size:14px}
    .form-section{background:linear-gradient(135deg,#fff0e6,#e9f4ff)}
    .form-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:35px;align-items:start}
    .contact-info h2{font-size:38px;line-height:1.2;margin:12px 0}
    .contact-info p{color:var(--muted)}
    .contact-list{display:grid;gap:12px;margin-top:24px}
    .contact-list div{background:#fff;padding:12px 15px;border-radius:9px;border-left:4px solid var(--blue)}
    form{background:#fff;padding:26px;border-radius:18px;box-shadow:var(--shadow)}
    .form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
    input,select,textarea{width:100%;border:1px solid #d9dfe8;border-radius:8px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
    input:focus,select:focus,textarea:focus{outline:3px solid rgba(23,105,224,.13);border-color:var(--blue)}
    textarea{min-height:125px;resize:vertical}
    .field{margin-bottom:15px}
    .form-submit{width:100%;border:0}
    .join-band{display:flex;justify-content:space-between;align-items:center;gap:25px;background:var(--pink);color:#fff;border-radius:20px;padding:28px 32px}
    .join-band h2{margin:0;font-size:28px}
    .join-band p{margin:5px 0 0;color:#ffe6ed}
    .join-band .btn{background:#fff;color:var(--pink)}
    footer{background:var(--ink);color:#fff;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:28px}
    footer h3{font-size:16px;margin:0 0 13px}
    footer p,footer a{color:#c8ced9;font-size:13px}
    footer a:hover{color:#fff}
    .footer-links{display:grid;gap:7px}
    .copyright{border-top:1px solid #394355;margin-top:30px;padding-top:16px;color:#aeb6c5;font-size:12px;display:flex;justify-content:space-between;gap:16px}
    .float-help{position:fixed;right:18px;bottom:20px;z-index:15;background:var(--orange);color:#fff;border-radius:50px;padding:11px 16px;box-shadow:0 9px 25px rgba(255,107,53,.3);font-size:13px;font-weight:700}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1080px){
      .nav-links a{padding-left:6px;padding-right:6px;font-size:12px}
      .cards{grid-template-columns:repeat(2,1fr)}
      .hero-grid,.intro-grid,.form-grid{grid-template-columns:1fr}
      .hero-panel{max-width:680px}
    }
    @media(max-width:760px){
      .topbar .container{justify-content:center;text-align:center}
      .topbar .container span:last-child{display:none}
      .nav-wrap{min-height:62px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:18px;right:18px;top:68px;background:#fff;padding:10px;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px;align-items:stretch}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:10px;font-size:13px}
      .nav-action{margin:0}
      .hero{padding:64px 0 58px}
      .hero-copy{font-size:16px}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .marker-list,.service-grid,.solution-grid,.testimonials,.case-grid,.faq-list,.article-list{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr;border-top:0}
      .step{border-right:0;border-bottom:1px solid var(--line);padding:18px 0}
      .media-strip{grid-template-columns:1fr}
      .rating-box{align-items:flex-start;flex-direction:column;gap:8px}
      .form-row{grid-template-columns:1fr}
      .join-band{display:block;padding:24px}
      .join-band .btn{margin-top:17px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:5px}
    }
    @media(prefers-reduced-motion:reduce){
      *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }