:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f3f6ff;
      --text:#1f2a37;
      --muted:#5b6472;
      --line:#e4e8f0;
      --brand:#2f6bff;
      --brand-2:#ff6b8b;
      --brand-3:#12b8a6;
      --shadow:0 18px 45px rgba(26, 44, 90, .10);
      --radius:22px;
      --max: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(47,107,255,.12), transparent 32%),
        radial-gradient(circle at 92% 10%, rgba(255,107,139,.12), transparent 26%),
        linear-gradient(180deg,#f9fbff 0%, #f5f7fc 48%, #f7f8fc 100%);
    }
    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:saturate(160%) blur(14px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(228,232,240,.7);
    }
    .nav-wrap{
      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:10px;background:#fff;box-shadow:0 8px 20px rgba(47,107,255,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;line-height:1.15}
    .brand-text span{display:block;font-size:.84rem;color:var(--muted);margin-top:3px}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      width:42px;height:42px;border-radius:12px; box-shadow:0 8px 20px rgba(15,23,42,.05);
    }
    .nav{
      display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end;
    }
    .nav a{
      font-size:.95rem; color:#2c3643; padding:9px 10px; border-radius:10px;
      transition:.2s ease;
    }
    .nav a:hover{background:rgba(47,107,255,.08); color:var(--brand)}
    .nav .home-btn{
      background:linear-gradient(135deg,var(--brand),#5f8dff);
      color:#fff; padding:10px 14px; border-radius:999px;
      box-shadow:0 14px 28px rgba(47,107,255,.22);
    }
    .nav .home-btn:hover{transform:translateY(-1px); background:linear-gradient(135deg,#285ce0,#4f7eff)}
    .hero{
      position:relative;
      padding:34px 0 20px;
      overflow:hidden;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.22fr .78fr; gap:22px; align-items:stretch;
    }
    .hero-panel{
      background:linear-gradient(135deg, rgba(47,107,255,.98), rgba(18,184,166,.95) 56%, rgba(255,107,139,.92));
      color:#fff; border-radius:28px; padding:34px; box-shadow:var(--shadow); position:relative; overflow:hidden;
    }
    .hero-panel::before,.hero-panel::after{
      content:""; position:absolute; border-radius:50%; background:rgba(255,255,255,.12); filter:blur(8px);
    }
    .hero-panel::before{width:180px;height:180px; right:-50px; top:-30px}
    .hero-panel::after{width:220px;height:220px; left:-80px; bottom:-90px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:7px 12px; border-radius:999px; background:rgba(255,255,255,.14); font-size:.86rem}
    h1{margin:16px 0 14px; font-size:clamp(2rem, 5vw, 3.45rem); line-height:1.1; letter-spacing:-.03em}
    .hero-panel p{margin:0; font-size:1.04rem; line-height:1.8; max-width:58ch; opacity:.96}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:13px 18px; border-radius:14px; border:1px solid transparent;
      font-weight:700; transition:.22s ease; cursor:pointer;
    }
    .btn-primary{background:#fff; color:#1142b6; box-shadow:0 16px 30px rgba(8,32,95,.16)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-ghost{background:rgba(255,255,255,.1); color:#fff; border-color:rgba(255,255,255,.22)}
    .btn-ghost:hover{background:rgba(255,255,255,.18); transform:translateY(-2px)}
    .hero-side{
      display:grid; gap:16px;
    }
    .side-card{
      background:rgba(255,255,255,.84); border:1px solid rgba(228,232,240,.9); border-radius:24px; padding:20px;
      box-shadow:0 12px 30px rgba(31,42,55,.08);
    }
    .side-card h2,.section-title h2{margin:0 0 10px; font-size:1.4rem}
    .section-title p{margin:0; color:var(--muted); line-height:1.7}
    .metric-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:18px}
    .metric{
      background:rgba(255,255,255,.88); border:1px solid rgba(228,232,240,.8); border-radius:20px; padding:18px;
      box-shadow:0 10px 24px rgba(31,42,55,.06);
    }
    .metric strong{display:block; font-size:1.5rem; color:#152033}
    .metric span{display:block; color:var(--muted); margin-top:5px; font-size:.92rem; line-height:1.5}
    .section{padding:22px 0}
    .section-title{display:flex; align-items:flex-end; justify-content:space-between; gap:18px; margin-bottom:16px}
    .section-title .tag{display:inline-flex; padding:7px 12px; border-radius:999px; background:rgba(47,107,255,.10); color:#2756d6; font-size:.85rem; font-weight:700}
    .card-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .card,.quote,.faq-item,.article,.case,.contact-card,.compare-card,.price-card,.timeline-card{
      background:rgba(255,255,255,.9); border:1px solid rgba(228,232,240,.92); border-radius:22px; box-shadow:0 12px 30px rgba(31,42,55,.06);
    }
    .card{padding:20px}
    .card h3{margin:0 0 10px; font-size:1.08rem}
    .card p,.card li{color:var(--muted); line-height:1.75}
    .pill-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
    .pill{padding:7px 10px; border-radius:999px; background:var(--panel-2); color:#31415a; font-size:.84rem; border:1px solid #dfe8ff}
    .feature-layout{display:grid; grid-template-columns:1fr 1fr; gap:16px}
    .feature-list{display:grid; gap:12px}
    .feature-item{display:flex; gap:12px; align-items:flex-start; padding:14px 16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .bullet{width:10px;height:10px;border-radius:50%; margin-top:7px; background:linear-gradient(135deg,var(--brand),var(--brand-2))}
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{padding:20px; border-radius:20px; background:linear-gradient(180deg,#fff,#f9fbff); border:1px solid var(--line)}
    .step .num{font-weight:800; color:var(--brand); font-size:.9rem}
    .step h3{margin:10px 0 8px}
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff; box-shadow:0 12px 30px rgba(31,42,55,.05)}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:14px 16px; border-bottom:1px solid #edf1f7; text-align:left; vertical-align:top}
    th{background:#f6f9ff; color:#2a3950; font-size:.95rem}
    td{color:#445166}
    .score-badge{display:inline-flex; align-items:center; gap:6px; padding:8px 12px; border-radius:999px; background:rgba(18,184,166,.12); color:#106b62; font-weight:700}
    .review-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .quote{padding:20px}
    .quote .role{color:#2756d6; font-weight:700; font-size:.9rem}
    .quote p{margin:10px 0 0; color:var(--muted); line-height:1.75}
    .faq-list{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; display:flex; align-items:center; justify-content:space-between; gap:16px; text-align:left;
      border:0; background:#fff; padding:18px 20px; color:var(--text); font-weight:700; font-size:1rem; cursor:pointer;
    }
    .faq-a{padding:0 20px 18px; color:var(--muted); line-height:1.75; display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .article-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article{padding:18px}
    .article .meta{color:#667085; font-size:.88rem; margin-bottom:8px}
    .article h3{margin:0 0 8px; font-size:1.03rem}
    .contact-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:16px}
    .contact-card{padding:20px}
    .form{
      display:grid; grid-template-columns:repeat(2,1fr); gap:12px;
    }
    .form .full{grid-column:1 / -1}
    label{display:block; font-size:.92rem; margin:0 0 6px; color:#334155; font-weight:600}
    input,select,textarea{
      width:100%; border:1px solid #d9e0ec; background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none; transition:.2s ease;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7aa2ff; box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .mini-links{display:flex; flex-wrap:wrap; gap:10px}
    .mini-links a{padding:9px 12px;border-radius:12px;background:#fff;border:1px solid var(--line);color:#334155}
    .footer{
      margin-top:18px; padding:24px 0 28px; background:#f6f8fd; border-top:1px solid #e5e9f2; color:#31415a;
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:16px; align-items:start}
    .footer a{color:#1f57d6}
    .footer small{display:block; color:#667085; line-height:1.8}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px; display:flex; align-items:center; justify-content:center;
      background:linear-gradient(135deg,var(--brand),#5d8bff); color:#fff; box-shadow:0 14px 30px rgba(47,107,255,.24);
    }
    .kefu{
      position:fixed; left:16px; bottom:16px; z-index:60; width:min(300px, calc(100vw - 32px));
      background:rgba(255,255,255,.95); border:1px solid var(--line); border-radius:22px; padding:14px; box-shadow:var(--shadow);
    }
    .kefu h3{margin:0 0 10px; font-size:1rem}
    .kefu-grid{display:grid; grid-template-columns:96px 1fr; gap:12px; align-items:center}
    .kefu img{border-radius:14px; border:1px solid var(--line)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#3b4b63; box-shadow:0 8px 20px rgba(31,42,55,.04)}
    .marquee{
      display:grid; gap:12px;
    }
    .network-list{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .network-item{padding:14px 16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .fade-in{opacity:0; transform:translateY(16px); transition:.55s ease}
    .fade-in.show{opacity:1; transform:none}
    @media (max-width: 960px){
      .hero-grid,.contact-grid,.feature-layout,.footer-grid{grid-template-columns:1fr}
      .metric-grid,.card-grid,.workflow,.review-grid,.article-grid{grid-template-columns:repeat(2,1fr)}
      .nav-toggle{display:inline-flex; align-items:center; justify-content:center}
      .nav{display:none; width:100%; padding:10px 0 2px}
      .nav.open{display:flex}
      .nav-wrap{flex-wrap:wrap}
      .section-title{flex-direction:column; align-items:flex-start}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .hero-panel{padding:24px}
      .metric-grid,.card-grid,.workflow,.review-grid,.article-grid,.network-list{grid-template-columns:1fr}
      .form{grid-template-columns:1fr}
      .kefu{display:none}
      .floating{right:12px; bottom:12px}
      .nav a{width:100%}
    }