:root{
      --bg:#f6f8fc;
      --surface:#ffffff;
      --surface-2:#f1f5ff;
      --text:#13213a;
      --muted:#5a6a84;
      --line:rgba(19,33,58,.12);
      --primary:#165dff;
      --primary-2:#7a5cff;
      --accent:#ff4d8d;
      --accent-2:#ffb84d;
      --good:#16a34a;
      --shadow:0 18px 50px rgba(17, 34, 68, .10);
      --shadow-2:0 12px 24px rgba(17, 34, 68, .08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,141,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(22,93,255,.10), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f6f8fc 28%, #f7f9fd 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(1.2) blur(16px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(19,33,58,.08);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:76px; padding:10px 0;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 20px rgba(0,0,0,.08)}
    .brand-text{display:flex; flex-direction:column; min-width:0}
    .brand-text strong{font-size:1rem; letter-spacing:.4px}
    .brand-text span{font-size:.82rem; color:var(--muted)}
    .nav-toggle{display:none; border:0; background:var(--surface); color:var(--text); border-radius:14px; padding:10px 12px; box-shadow:var(--shadow-2)}
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:.95rem; color:#2b3950; padding:8px 10px; border-radius:999px; transition:.25s ease}
    .nav-links a:hover{background:rgba(22,93,255,.08); color:var(--primary)}
    .nav-cta{display:inline-flex; align-items:center; gap:10px; background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff !important; padding:11px 16px !important; box-shadow:0 12px 26px rgba(22,93,255,.22)}
    .nav-cta:hover{transform:translateY(-1px)}
    main{padding-bottom:8px}
    section{padding:28px 0}
    .hero{padding:28px 0 16px}
    .hero-card{
      position:relative; overflow:hidden;
      background:
        linear-gradient(135deg, rgba(22,93,255,.96), rgba(122,92,255,.92) 58%, rgba(255,77,141,.92));
      color:#fff; border-radius:30px; box-shadow:var(--shadow);
      padding:34px 26px;
    }
    .hero-card:before,.hero-card:after{
      content:""; position:absolute; border-radius:50%; pointer-events:none; opacity:.26;
      background:radial-gradient(circle, rgba(255,255,255,.95), transparent 62%);
      filter:blur(4px)
    }
    .hero-card:before{width:220px;height:220px;right:-70px;top:-60px}
    .hero-card:after{width:180px;height:180px;left:-60px;bottom:-60px}
    .hero-grid{display:grid; grid-template-columns:1.25fr .75fr; gap:24px; align-items:stretch; position:relative; z-index:1}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:7px 12px; border-radius:999px; background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.20); font-size:.86rem}
    h1{margin:.7rem 0 1rem; font-size:clamp(2rem, 4vw, 3.7rem); line-height:1.08; letter-spacing:-.02em}
    .hero p{margin:0; max-width:58ch; font-size:1.04rem; color:rgba(255,255,255,.92)}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:10px;
      border-radius:14px; padding:13px 18px; font-weight:700; border:1px solid transparent;
      transition:.25s ease; cursor:pointer
    }
    .btn-primary{background:#fff; color:#17306a}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 14px 28px rgba(0,0,0,.16)}
    .btn-secondary{background:rgba(255,255,255,.12); color:#fff; border-color:rgba(255,255,255,.20)}
    .btn-secondary:hover{background:rgba(255,255,255,.18); transform:translateY(-2px)}
    .hero-stats{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; align-content:stretch}
    .stat{
      background:rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.18);
      border-radius:22px; padding:18px 16px; min-height:110px
    }
    .stat strong{display:block; font-size:1.8rem; line-height:1.1; margin-bottom:6px}
    .stat span{font-size:.92rem; color:rgba(255,255,255,.9)}
    .ticker{
      display:flex; flex-wrap:wrap; gap:10px; margin-top:18px
    }
    .pill{padding:8px 12px; border-radius:999px; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.16); font-size:.88rem}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:18px}
    .section-head h2{margin:0; font-size:clamp(1.4rem, 2.6vw, 2.2rem); line-height:1.15}
    .section-head p{margin:0; color:var(--muted); max-width:70ch}
    .grid-4{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
    .card,.panel,.review,.faq-item,.article,.price-box,.timeline-item,.contact-box,.compare-box,.service-net{
      background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow-2)
    }
    .card{padding:22px}
    .card h3,.panel h3,.review h3,.compare-box h3{margin:0 0 8px; font-size:1.08rem}
    .card p,.panel p,.review p{margin:0; color:var(--muted)}
    .icon-badge{
      width:46px; height:46px; display:grid; place-items:center; border-radius:14px;
      background:linear-gradient(135deg, rgba(22,93,255,.12), rgba(255,77,141,.12));
      color:var(--primary); margin-bottom:14px; font-size:1.2rem
    }
    .soft{
      background:linear-gradient(180deg, rgba(22,93,255,.05), rgba(255,77,141,.04));
      border:1px solid rgba(22,93,255,.10)
    }
    .section-bg{background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.78)); border-top:1px solid rgba(19,33,58,.05); border-bottom:1px solid rgba(19,33,58,.05)}
    .about-wrap{display:grid; grid-template-columns:1.1fr .9fr; gap:16px; align-items:start}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
    .tag-cloud span{background:#fff; border:1px solid var(--line); padding:8px 12px; border-radius:999px; color:#21314f; font-size:.88rem}
    .media-frame{overflow:hidden; border-radius:26px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-2)}
    .media-frame .stack{display:grid; grid-template-columns:1fr 1fr; gap:12px; padding:12px}
    .media-frame img{border-radius:18px; width:100%; height:auto; object-fit:cover}
    .feature-list{display:grid; gap:10px; margin-top:14px}
    .feature-list div{display:flex; gap:10px; align-items:flex-start; color:#21314f}
    .feature-list b{color:var(--primary)}
    .steps{counter-reset:step}
    .step{
      padding:22px; position:relative; overflow:hidden
    }
    .step:before{
      counter-increment:step; content:counter(step, decimal-leading-zero);
      position:absolute; right:18px; top:14px; font-size:2rem; font-weight:800; color:rgba(22,93,255,.12)
    }
    .step .label{display:inline-flex; margin-bottom:10px; color:var(--primary); font-weight:700}
    .compare{overflow:hidden}
    .table-wrap{overflow:auto; border-radius:20px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:14px 16px; text-align:left; border-bottom:1px solid rgba(19,33,58,.08); vertical-align:top}
    th{background:#f5f8ff; color:#1b2a49}
    td{color:#33415f}
    .rating{font-size:1.1rem; color:#ff8a00; font-weight:800}
    .highlight-row td{background:rgba(22,93,255,.05)}
    .accordion{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; border:0; background:transparent; padding:18px 20px; display:flex; align-items:center; justify-content:space-between;
      text-align:left; font:inherit; color:var(--text); cursor:pointer
    }
    .faq-q span{font-weight:700}
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-item.active .faq-a{max-height:220px; padding-bottom:18px}
    .faq-item.active .chev{transform:rotate(180deg)}
    .faq-a p{margin:0; color:var(--muted)}
    .chev{transition:.25s ease; color:var(--muted)}
    .reviews .review{padding:20px}
    .avatar{
      width:42px; height:42px; border-radius:50%; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(22,93,255,.12), rgba(255,77,141,.12)); color:var(--primary); font-weight:800
    }
    .review-top{display:flex; align-items:center; gap:12px; margin-bottom:12px}
    .review small{color:var(--muted)}
    .articles{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .article{padding:20px; display:flex; flex-direction:column; gap:10px}
    .article .meta{color:var(--muted); font-size:.88rem}
    .article a.more{color:var(--primary); font-weight:700}
    .contact-grid{display:grid; grid-template-columns:1fr .86fr; gap:16px; align-items:start}
    form{display:grid; gap:14px}
    .field{display:grid; gap:8px}
    label{font-weight:700; color:#20304e}
    input,select,textarea{
      width:100%; border:1px solid rgba(19,33,58,.14); background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; outline:none; transition:.2s ease; font:inherit
    }
    textarea{min-height:128px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(22,93,255,.45); box-shadow:0 0 0 4px rgba(22,93,255,.10)}
    .form-actions{display:flex; gap:12px; flex-wrap:wrap}
    .footer{
      margin-top:8px; padding:28px 0 34px; background:#0d1b38; color:#eaf0ff;
      border-top:1px solid rgba(255,255,255,.08)
    }
    .footer a{color:#ffffff}
    .footer .muted{color:rgba(234,240,255,.72)}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr .9fr; gap:18px}
    .footer .links{display:flex; flex-wrap:wrap; gap:10px}
    .footer .links a{padding:8px 12px; background:rgba(255,255,255,.08); border-radius:999px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .floating a,.floating button{
      width:48px; height:48px; border-radius:16px; border:0; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff; box-shadow:0 14px 28px rgba(22,93,255,.28); cursor:pointer
    }
    .backtop{opacity:0; transform:translateY(10px); pointer-events:none; transition:.25s ease}
    .backtop.show{opacity:1; transform:translateY(0); pointer-events:auto}
    .floating-card{
      position:fixed; left:16px; bottom:16px; z-index:60; background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); padding:12px; width:min(300px, calc(100vw - 32px))
    }
    .floating-card .row{display:flex; gap:12px; align-items:center}
    .floating-card img{width:84px; height:84px; object-fit:cover; border-radius:14px; border:1px solid var(--line)}
    .floating-card .txt{min-width:0}
    .floating-card strong{display:block; margin-bottom:4px}
    .floating-card p{margin:0; color:var(--muted); font-size:.9rem}
    .mobile-only{display:none}
    .scroll-note{font-size:.92rem; color:var(--muted)}
    .gallery{
      display:grid; grid-template-columns:1.1fr .9fr; gap:16px
    }
    .gallery .right{display:grid; gap:16px}
    .quote{border-left:4px solid var(--primary); padding-left:14px; color:#2b3950}
    .price-list{display:grid; gap:12px}
    .price-row{display:flex; justify-content:space-between; gap:16px; padding:14px 16px; background:#fff; border:1px solid var(--line); border-radius:16px}
    .timeline{display:grid; gap:12px}
    .timeline-item{padding:18px 18px 18px 22px; position:relative}
    .timeline-item:before{content:""; position:absolute; left:12px; top:22px; width:8px; height:8px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--accent))}
    .timeline-item h3{margin-left:10px}
    .timeline-item p{margin-left:10px}
    .service-net{padding:20px}
    .service-net .nodes{display:flex; flex-wrap:wrap; gap:10px}
    .service-net .nodes span{padding:10px 12px; border-radius:999px; background:linear-gradient(135deg, rgba(22,93,255,.08), rgba(255,77,141,.08)); color:#1e2d4a; border:1px solid rgba(22,93,255,.12)}
    .mobile-article-links{display:none}
    .reveal{opacity:0; transform:translateY(14px); transition:.55s ease}
    .reveal.show{opacity:1; transform:none}
    @media (max-width: 980px){
      .hero-grid,.about-wrap,.contact-grid,.gallery,.footer-grid,.grid-4,.grid-3,.grid-2,.articles{grid-template-columns:1fr}
      .nav-toggle{display:inline-grid; place-items:center}
      .nav-links{
        display:none; width:100%; padding:12px 0 4px; justify-content:flex-start
      }
      .nav-links.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .hero-card{padding:24px 18px}
      .floating-card{display:none}
      .mobile-only{display:block}
      .mobile-article-links{display:grid; gap:10px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 22px))}
      section{padding:22px 0}
      .section-head{flex-direction:column; align-items:flex-start}
      .hero-actions,.form-actions,.ticker{gap:10px}
      .btn{width:100%}
      .hero-stats{grid-template-columns:1fr}
      .media-frame .stack{grid-template-columns:1fr}
      th,td{padding:12px}
      .floating{right:12px; bottom:12px}
    }