:root{
      --bg:#f7f4ef;
      --bg2:#eef3fb;
      --card:#ffffff;
      --line:#e7e0d6;
      --text:#1f2a37;
      --muted:#667085;
      --brand:#2563eb;
      --brand2:#7c3aed;
      --accent:#f59e0b;
      --shadow:0 18px 40px rgba(34, 46, 77, .08);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 26%),
        radial-gradient(circle at top right, rgba(245,158,11,.09), transparent 20%),
        linear-gradient(180deg, var(--bg) 0%, #fbfaf7 46%, #f6f8fc 100%);
      min-width:320px;
    }
    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(160%) blur(14px);
      background:rgba(247,244,239,.82);
      border-bottom:1px solid rgba(231,224,214,.85);
    }
    .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 img{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand strong{display:block; font-size:18px; line-height:1.1}
    .brand span{display:block; font-size:12px; color:var(--muted); margin-top:3px}
    .menu-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); border-radius:14px; padding:10px 12px; font-size:14px}
    .nav-links{display:flex; flex-wrap:wrap; justify-content:flex-end; gap:10px 16px; align-items:center}
    .nav-links a{font-size:14px; color:#374151; padding:8px 10px; border-radius:999px; transition:.25s ease}
    .nav-links a:hover,.nav-links a:focus{background:rgba(37,99,235,.08); color:var(--brand)}
    .home-link{
      display:inline-flex; align-items:center; gap:6px;
      background:linear-gradient(135deg, var(--brand), var(--brand2));
      color:#fff !important; padding:10px 14px; border-radius:999px; box-shadow:0 10px 20px rgba(37,99,235,.18);
    }
    .hero{padding:36px 0 16px}
    .hero-grid{display:grid; grid-template-columns:1.3fr .9fr; gap:22px; align-items:stretch}
    .hero-card,.info-card,.feature-card,.review-card,.case-card,.faq-card,.form-card,.stat-card,.compare-card,.timeline-card,.table-card,.news-card,.help-card{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(231,224,214,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{padding:34px; position:relative; overflow:hidden}
    .hero-card:before,.hero-card:after{
      content:""; position:absolute; border-radius:999px; pointer-events:none;
      background:linear-gradient(135deg, rgba(37,99,235,.13), rgba(124,58,237,.08));
      filter:blur(4px);
    }
    .hero-card:before{width:260px; height:260px; right:-110px; top:-80px}
    .hero-card:after{width:180px; height:180px; right:80px; bottom:-90px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; font-size:13px; color:#0f766e; background:rgba(16,185,129,.1); padding:8px 12px; border-radius:999px}
    h1{margin:16px 0 14px; font-size:clamp(30px, 5vw, 54px); line-height:1.08; letter-spacing:-.03em}
    .hero p{margin:0; font-size:16px; line-height:1.8; color:#455468; max-width:58ch}
    .cta-row{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:transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg, var(--brand), var(--brand2)); color:#fff; box-shadow:0 14px 24px rgba(37,99,235,.18)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .hero-side{display:grid; gap:16px}
    .stat-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .stat-card{padding:18px}
    .stat-card b{display:block; font-size:28px; margin-bottom:4px}
    .stat-card span{font-size:13px; color:var(--muted)}
    .visual-panel{padding:18px; display:grid; gap:14px}
    .chip-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .chip{padding:8px 12px; border-radius:999px; background:linear-gradient(180deg,#fff, #f6f8ff); border:1px solid var(--line); font-size:13px; color:#334155}
    .section{padding:18px 0 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:14px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:68ch; line-height:1.7}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .feature-card,.review-card,.case-card,.faq-card,.form-card,.compare-card,.timeline-card,.table-card,.news-card,.help-card{padding:22px}
    .feature-card h3,.review-card h3,.case-card h3,.faq-card h3,.form-card h3,.compare-card h3,.timeline-card h3,.table-card h3,.news-card h3,.help-card h3{margin:0 0 10px; font-size:18px}
    .feature-card p,.review-card p,.case-card p,.form-card p,.compare-card p,.timeline-card p,.table-card p,.news-card p,.help-card p{margin:0; color:#4b5563; line-height:1.75}
    .icon{
      width:46px; height:46px; border-radius:14px; display:grid; place-items:center; margin-bottom:14px;
      background:linear-gradient(135deg, rgba(37,99,235,.12), rgba(245,158,11,.12)); color:var(--brand); font-weight:800;
    }
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step{padding:20px; border-radius:20px; background:linear-gradient(180deg,#fff,#fafafa); border:1px solid var(--line)}
    .step small{display:inline-flex; margin-bottom:12px; color:var(--brand); font-weight:700}
    .step h3{margin:0 0 8px; font-size:17px}
    .step p{margin:0; color:#526072; line-height:1.7}
    .table-wrap{overflow:auto; border-radius:18px; border:1px solid var(--line)}
    table{width:100%; border-collapse:collapse; min-width:760px; background:#fff}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f8fafc; color:#334155; font-size:14px}
    td{color:#475569; font-size:14px; line-height:1.65}
    .rating{font-weight:800; color:#0f766e}
    .stars{color:#f59e0b; font-size:18px; letter-spacing:2px}
    .accordion{display:grid; gap:12px}
    details{background:#fff; border:1px solid var(--line); border-radius:18px; overflow:hidden}
    summary{list-style:none; cursor:pointer; padding:18px 20px; font-weight:700; display:flex; justify-content:space-between; gap:14px}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 20px 18px; margin:0; color:#4b5563; line-height:1.8}
    .review-meta{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:14px}
    .review-role{color:var(--brand); font-weight:700; font-size:13px}
    .quote{font-size:15px; line-height:1.85; color:#425466}
    .case-list,.news-list,.tag-list,.link-list{display:flex; flex-wrap:wrap; gap:10px}
    .tag,.link-pill{padding:10px 14px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#334155; font-size:13px}
    .timeline{display:grid; gap:14px}
    .timeline-item{display:grid; grid-template-columns:auto 1fr; gap:14px; align-items:start}
    .dot{width:12px; height:12px; margin-top:8px; border-radius:50%; background:linear-gradient(135deg, var(--brand), var(--accent))}
    .table-mini{display:grid; gap:10px}
    .table-mini .row{display:grid; grid-template-columns:140px 1fr; gap:12px; padding:12px 0; border-bottom:1px dashed var(--line)}
    .table-mini .row:last-child{border-bottom:none}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    input,select,textarea{
      width:100%; border:1px solid #d7dce5; background:#fff; color:var(--text); border-radius:14px; padding:13px 14px;
      font:inherit; outline:none; transition:border-color .2s, box-shadow .2s;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(37,99,235,.55); box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    textarea{min-height:128px; resize:vertical}
    .full{grid-column:1/-1}
    .submit-row{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-top:4px}
    .foot{
      margin-top:24px; padding:26px 0 22px;
      border-top:1px solid rgba(231,224,214,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.42), rgba(255,255,255,.78));
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px}
    .footer-note{color:#526072; line-height:1.75; font-size:14px}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:9px 12px; border:1px solid var(--line); background:#fff; border-radius:999px; font-size:13px}
    .fixed-contact{
      position:fixed; right:16px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      display:inline-flex; align-items:center; justify-content:center; min-width:52px; height:52px;
      border-radius:16px; box-shadow:0 14px 28px rgba(15,23,42,.14); color:#fff; font-weight:700;
      background:linear-gradient(135deg, var(--brand), var(--brand2));
    }
    .backtop{background:#111827}
    .reveal{opacity:0; transform:translateY(18px); transition:opacity .55s ease, transform .55s ease}
    .reveal.show{opacity:1; transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.workflow,.footer-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start; flex-direction:column}
      .nav{position:relative}
      .menu-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:0; right:0; top:64px;
        flex-direction:column; align-items:flex-start; padding:14px; background:rgba(255,255,255,.98);
        border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex}
      .mobile-only{display:inline-flex}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .hero-card,.feature-card,.review-card,.case-card,.faq-card,.form-card,.compare-card,.timeline-card,.table-card,.news-card,.help-card,.visual-panel{padding:18px}
      .stat-grid{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      h1{font-size:30px}
    }