:root{
      --bg:#f5f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#122033;
      --muted:#5f6b7c;
      --line:#dfe6f2;
      --primary:#2558ff;
      --primary2:#7b5cff;
      --accent:#16c7b7;
      --warm:#ffb54d;
      --shadow:0 18px 50px rgba(25, 45, 98, .10);
      --radius:22px;
      --radius-sm:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 12%, rgba(37,88,255,.08), transparent 24%),
        radial-gradient(circle at 88% 14%, rgba(123,92,255,.10), transparent 24%),
        radial-gradient(circle at 75% 88%, rgba(22,199,183,.08), transparent 22%),
        linear-gradient(180deg, #f8fbff 0%, #f4f7fb 34%, #f6f8fc 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(14px);
      background:rgba(245,247,251,.80);
      border-bottom:1px solid rgba(223,230,242,.9);
    }
    .header-inner{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:76px;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{
      width:46px; height:46px; object-fit:contain; border-radius:14px; background:#fff; box-shadow:0 10px 24px rgba(37,88,255,.12); padding:6px;
    }
    .brand-text{display:flex; flex-direction:column; min-width:0}
    .brand-text strong{font-size:1.02rem; letter-spacing:.04em}
    .brand-text span{font-size:.84rem; color:var(--muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
    .nav-wrap{display:flex; align-items:center; gap:12px}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:var(--card); color:var(--text);
      border-radius:14px; padding:10px 12px; box-shadow:0 8px 20px rgba(18,32,51,.05);
    }
    nav.primary-nav{display:flex; align-items:center; gap:16px; flex-wrap:wrap}
    nav.primary-nav a{font-size:.92rem; color:#32465e; padding:8px 10px; border-radius:999px; transition:.25s ease}
    nav.primary-nav a:hover, nav.primary-nav a.active{background:rgba(37,88,255,.10); color:var(--primary)}
    .cta-btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:0; border-radius:999px; padding:12px 18px; font-weight:700;
      color:#fff; background:linear-gradient(135deg, var(--primary), var(--primary2));
      box-shadow:0 14px 28px rgba(37,88,255,.24); transition:.25s ease;
      white-space:nowrap;
    }
    .cta-btn:hover{transform:translateY(-2px); box-shadow:0 18px 34px rgba(37,88,255,.28)}
    .ghost-btn{
      display:inline-flex; align-items:center; justify-content:center;
      border:1px solid rgba(37,88,255,.20); color:var(--primary); background:#fff;
      border-radius:999px; padding:11px 16px; font-weight:700;
    }
    .hero{
      padding:36px 0 22px;
    }
    .hero-shell{
      position:relative; overflow:hidden;
      background:
        linear-gradient(135deg, rgba(255,255,255,.92), rgba(238,243,255,.90)),
        linear-gradient(135deg, rgba(37,88,255,.06), rgba(123,92,255,.06));
      border:1px solid rgba(223,230,242,.95);
      border-radius:32px;
      box-shadow:var(--shadow);
      padding:34px;
    }
    .hero-shell::before,.hero-shell::after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:radial-gradient(circle, rgba(37,88,255,.14), transparent 68%);
      filter:blur(4px);
    }
    .hero-shell::before{width:260px;height:260px; right:-90px; top:-60px}
    .hero-shell::after{width:180px;height:180px; left:-60px; bottom:-60px; background:radial-gradient(circle, rgba(22,199,183,.12), transparent 68%)}
    .hero-grid{
      position:relative; display:grid; grid-template-columns:1.1fr .9fr; gap:28px; align-items:center;
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:7px 12px; border-radius:999px; background:rgba(37,88,255,.10); color:var(--primary); font-weight:700; font-size:.88rem;
    }
    h1{margin:14px 0 14px; font-size:clamp(2rem, 4.4vw, 3.6rem); line-height:1.12}
    .hero p{margin:0; color:#405269; font-size:1.04rem; max-width:60ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-points{display:flex; flex-wrap:wrap; gap:10px; margin-top:22px}
    .mini-pill{
      padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line);
      color:#3f5169; font-size:.92rem; box-shadow:0 10px 20px rgba(18,32,51,.04)
    }
    .hero-panel{
      display:grid; gap:14px;
    }
    .hero-card{
      background:linear-gradient(180deg, #ffffff, #f8fbff);
      border:1px solid rgba(223,230,242,.95);
      border-radius:24px; padding:18px;
      box-shadow:0 14px 30px rgba(25,45,98,.08);
    }
    .hero-card h3{margin:0 0 10px; font-size:1.05rem}
    .hero-stat{
      display:grid; grid-template-columns:repeat(2,1fr); gap:12px;
    }
    .stat{
      border-radius:18px; padding:14px; background:linear-gradient(180deg, rgba(37,88,255,.08), rgba(123,92,255,.06)); border:1px solid rgba(37,88,255,.08)
    }
    .stat strong{display:block; font-size:1.25rem}
    .stat span{font-size:.86rem; color:var(--muted)}
    .section{padding:24px 0}
    .section-head{display:flex; justify-content:space-between; gap:18px; align-items:end; margin-bottom:16px}
    .section-head h2{margin:0; font-size:1.65rem}
    .section-head p{margin:0; color:var(--muted); max-width:66ch}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{
      background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
      box-shadow:0 12px 28px rgba(18,32,51,.05); padding:20px;
      transition:.25s ease;
    }
    .card:hover{transform:translateY(-4px); box-shadow:0 18px 34px rgba(18,32,51,.10)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0; color:var(--muted)}
    .metric{display:flex; gap:14px; align-items:flex-start}
    .metric .icon{
      width:44px;height:44px;border-radius:14px; flex:0 0 auto;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(37,88,255,.12), rgba(123,92,255,.12));
      color:var(--primary); font-size:1.1rem;
    }
    .metric strong{display:block; font-size:1.3rem}
    .metric span{color:var(--muted); font-size:.92rem}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{
      padding:9px 12px; border:1px solid var(--line); background:#fff; border-radius:999px; color:#31435a;
      font-size:.92rem;
    }
    .service-list{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .service-item{
      padding:18px; border-radius:20px; background:linear-gradient(180deg, #fff, #f9fbff); border:1px solid var(--line)
    }
    .service-item strong{display:block; margin-bottom:8px}
    .service-item ul{margin:0; padding-left:18px; color:var(--muted)}
    .timeline{display:grid; gap:14px}
    .step{
      display:grid; grid-template-columns:72px 1fr; gap:14px; align-items:start;
      padding:18px; background:#fff; border:1px solid var(--line); border-radius:20px;
    }
    .step .num{
      width:72px; height:72px; border-radius:20px; display:grid; place-items:center; font-weight:800;
      background:linear-gradient(135deg, rgba(37,88,255,.12), rgba(22,199,183,.12)); color:var(--primary);
    }
    .comparison{
      overflow:auto; border-radius:20px; border:1px solid var(--line); background:#fff;
    }
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f8fbff; color:#213248; font-size:.95rem}
    .good{color:#067a5a; font-weight:700}
    .warn{color:#a06a00; font-weight:700}
    .rating{
      display:grid; gap:12px;
      grid-template-columns:1.1fr .9fr;
    }
    .score-box{
      padding:22px; border-radius:24px; background:linear-gradient(135deg, rgba(37,88,255,.08), rgba(123,92,255,.08));
      border:1px solid rgba(37,88,255,.12)
    }
    .score-stars{font-size:1.3rem; letter-spacing:.12em; color:#ff9b1f}
    .score-num{font-size:2.5rem; font-weight:900; line-height:1; margin:10px 0 6px}
    .review-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review{
      position:relative; padding:20px; border-radius:22px; background:linear-gradient(180deg, #ffffff, #f8fbff);
      border:1px solid var(--line);
    }
    .review .role{color:var(--primary); font-weight:700; margin-bottom:8px}
    .review .stars{color:#ff9b1f; margin-bottom:10px}
    .review p{margin:0 0 12px; color:#425569}
    .review .name{color:var(--muted); font-size:.92rem}
    .gallery{
      display:grid; grid-template-columns:1.2fr .8fr; gap:16px;
    }
    .media-stack{display:grid; gap:16px}
    .media-card{
      overflow:hidden; border-radius:24px; border:1px solid var(--line); background:#fff;
    }
    .media-card img{width:100%; height:auto}
    .media-card .caption{padding:16px 18px; color:var(--muted)}
    .news-list{display:grid; gap:12px}
    .news-item{
      display:flex; justify-content:space-between; gap:16px; align-items:center;
      padding:16px 18px; border:1px solid var(--line); background:#fff; border-radius:18px;
    }
    .news-item span{color:var(--muted); font-size:.92rem}
    .footer{
      margin-top:18px;
      border-top:1px solid rgba(223,230,242,.95);
      background:#f7faff;
      color:#223246;
    }
    .footer a{color:#2448c7}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr .9fr; gap:18px; padding:24px 0}
    .footer small{color:#5a6679}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{
      padding:8px 10px; border:1px solid var(--line); border-radius:999px; background:#fff; color:#32465e;
    }
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .floating a, .floating button{
      width:48px; height:48px; border-radius:50%;
      border:1px solid rgba(37,88,255,.15);
      background:#fff; color:var(--primary); box-shadow:0 14px 30px rgba(25,45,98,.14);
      display:grid; place-items:center; cursor:pointer; font-weight:800;
    }
    .floating .contact{
      width:auto; min-width:48px; padding:0 14px; border-radius:999px; font-size:.92rem; gap:8px; display:flex; align-items:center;
    }
    .modal{
      position:fixed; inset:0; background:rgba(10,20,34,.45); display:none; align-items:center; justify-content:center; z-index:70; padding:16px;
    }
    .modal.open{display:flex}
    .modal-panel{
      width:min(720px, 100%); background:#fff; border-radius:24px; padding:20px; box-shadow:0 30px 80px rgba(0,0,0,.25)
    }
    .modal-grid{display:grid; grid-template-columns:220px 1fr; gap:18px; align-items:center}
    .faq details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px 18px;
    }
    .faq details + details{margin-top:12px}
    .faq summary{cursor:pointer; list-style:none; font-weight:700}
    .faq summary::-webkit-details-marker{display:none}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:grid; gap:8px}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px; font:inherit; color:var(--text);
      background:#fff; outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(37,88,255,.45); box-shadow:0 0 0 4px rgba(37,88,255,.08)}
    textarea{min-height:120px; resize:vertical}
    .span-2{grid-column:span 2}
    .submit-row{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-top:8px}
    .anchor-space{scroll-margin-top:96px}
    .mobile-menu{
      display:none; padding:12px 0 18px;
    }
    .mobile-menu nav{display:grid; grid-template-columns:repeat(2,1fr); gap:10px}
    .mobile-menu a{padding:10px 12px; border-radius:14px; background:#fff; border:1px solid var(--line); color:#32465e}
    .scroll-top{opacity:0; visibility:hidden; transform:translateY(10px); transition:.25s ease}
    .scroll-top.show{opacity:1; visibility:visible; transform:none}
    .reveal{opacity:0; transform:translateY(16px); transition:.55s ease}
    .reveal.visible{opacity:1; transform:none}
    .price-box{
      display:grid; grid-template-columns:repeat(3,1fr); gap:16px;
    }
    .price{
      padding:18px; border-radius:20px; background:#fff; border:1px solid var(--line)
    }
    .price strong{display:block; font-size:1.25rem}
    .price em{font-style:normal; color:var(--primary); font-weight:800}
    @media (max-width: 1024px){
      .hero-grid,.gallery,.rating,.footer-grid,.grid-4,.grid-3,.review-grid,.price-box{grid-template-columns:1fr 1fr}
      .service-list{grid-template-columns:1fr}
    }
    @media (max-width: 780px){
      .header-inner{flex-wrap:wrap; padding:12px 0}
      .nav-wrap{margin-left:auto}
      nav.primary-nav{display:none}
      .nav-toggle{display:inline-grid}
      .mobile-menu.show{display:block}
      .hero-shell{padding:22px}
      .hero-grid,.gallery,.rating,.footer-grid,.grid-4,.grid-3,.grid-2,.review-grid,.price-box,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .modal-grid{grid-template-columns:1fr}
      .span-2{grid-column:auto}
      .cta-btn,.ghost-btn{width:100%}
      .hero-actions{display:grid}
      .submit-row{display:grid}
    }