:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel2:#f2f5ff;
      --text:#172033;
      --muted:#5d6782;
      --line:#e4e8f3;
      --brand:#2f6bff;
      --brand2:#ff5a7a;
      --brand3:#12b3a8;
      --shadow:0 18px 50px rgba(31,55,122,.08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 26%),
      radial-gradient(circle at top right, rgba(255,90,122,.10), transparent 20%),
      linear-gradient(180deg,#f9fbff 0%,#f5f7fd 38%,#f7f8fc 100%);
      color:var(--text);line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--container));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid rgba(228,232,243,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 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;padding:4px;border:1px solid var(--line)}
    .brand-text strong{display:block;font-size:1rem;letter-spacing:.5px}
    .brand-text span{display:block;color:var(--muted);font-size:.86rem}
    .menu{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:.92rem;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .menu a:hover,.menu a:focus{background:rgba(47,107,255,.10);color:var(--text)}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border-radius:999px;border:1px solid transparent;font-weight:700;transition:.22s;cursor:pointer;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#6c8cff);color:#fff;box-shadow:0 10px 24px rgba(47,107,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-1px)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel{background:rgba(255,255,255,.86);border:1px solid rgba(228,232,243,.92);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:999px;filter:blur(0)}
    .hero-main:before{width:220px;height:220px;background:radial-gradient(circle, rgba(47,107,255,.16), transparent 62%);right:-40px;top:-44px}
    .hero-main:after{width:160px;height:160px;background:radial-gradient(circle, rgba(255,90,122,.16), transparent 62%);left:-44px;bottom:-30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(47,107,255,.10);color:#2249cc;border:1px solid rgba(47,107,255,.14);padding:8px 12px;border-radius:999px;font-size:.88rem;font-weight:700}
    h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;margin:16px 0 14px}
    .lead{font-size:1.05rem;color:var(--muted);max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 22px}
    .hero-highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .mini-stat{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff, #f6f8ff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:1.1rem}
    .mini-stat span{color:var(--muted);font-size:.88rem}
    .hero-side{padding:24px;display:grid;gap:14px}
    .side-card{padding:18px;border-radius:18px;background:linear-gradient(135deg,#0f1f45,#2748a7);color:#fff}
    .side-card h2,.side-card h3{margin:0 0 8px}
    .side-card p{margin:0;color:rgba(255,255,255,.82)}
    .side-list{display:grid;gap:10px}
    .side-list .item{padding:13px 14px;border-radius:14px;background:#f6f8ff;border:1px solid var(--line)}
    section{padding:18px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-title h2{margin:0;font-size:1.55rem}
    .section-title p{margin:0;color:var(--muted)}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{padding:18px}
    .card h3{margin:0 0 8px;font-size:1.05rem}
    .card p{margin:0;color:var(--muted)}
    .tag-cloud,.service-network,.article-list,.faq-list,.timeline,.review-grid{display:grid;gap:12px}
    .chip{display:inline-flex;padding:8px 10px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);font-size:.9rem;color:#304165}
    .metric{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
    .metric strong{font-size:1.6rem}
    .metric span{color:var(--muted);font-size:.88rem}
    .steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative;padding:18px 16px 16px 16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step:before{counter-increment:step;content:counter(step);display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--brand2),#ff8a5c);color:#fff;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:.95rem}
    th{background:#f8faff}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .stars{color:#ffb400;letter-spacing:2px;font-size:1.1rem}
    .accordion{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
    summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 18px 18px;margin:0;color:var(--muted)}
    .reviews .card,.articles .card,.cases .card{height:100%}
    .quote{font-size:.95rem;color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:grid;gap:8px}
    label{font-weight:700;font-size:.93rem}
    input,select,textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7b9dff;box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
    .footer{margin-top:18px;padding:24px 0 30px;background:#101828;color:#d7def5}
    .footer a{color:#ffffff}
    .footer .container{display:grid;gap:18px}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer h3{margin:0 0 10px;color:#fff}
    .footer p,.footer li,.footer span{color:#d7def5}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .floating{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}
    .float-btn{width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),#6f8bff);color:#fff;box-shadow:0 14px 26px rgba(47,107,255,.26)}
    .backtop{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .fade-up{opacity:0;transform:translateY(18px);transition:.55s ease}
    .fade-up.in{opacity:1;transform:none}
    .kefu-pop{display:grid;gap:10px}
    .ai-page-image{border-radius:16px;border:1px solid var(--line)}
    .latest-links,.friendly-links{display:flex;flex-wrap:wrap;gap:10px}
    .latest-links a,.friendly-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .section-soft{background:linear-gradient(180deg,rgba(255,255,255,.0),rgba(255,255,255,.36))}
    .split{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.steps,.footer-top,.split{grid-template-columns:1fr}
      .menu{display:none}
      .nav-toggle{display:inline-flex}
      .menu.open{display:flex;position:absolute;left:16px;right:16px;top:68px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}
      .hero-main{padding:24px}
      .hero-highlights,.form-grid{grid-template-columns:1fr}
      .nav{position:relative}
    }