:root{
      --bg:#f5f8f4;
      --surface:#ffffff;
      --surface-2:#f1f8ef;
      --text:#193021;
      --muted:#5d6f60;
      --line:#d8e7d8;
      --brand:#18c65b;
      --brand-2:#0da24a;
      --accent:#0f7a39;
      --shadow:0 16px 40px rgba(24,198,91,.10);
      --shadow-2:0 10px 24px rgba(17,54,26,.08);
      --radius:20px;
      --radius-sm:14px;
      --container: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 top left, rgba(24,198,91,.11), transparent 28%),
        radial-gradient(circle at top right, rgba(13,162,74,.08), transparent 24%),
        linear-gradient(180deg, #f8fbf7 0%, #f4f8f4 48%, #f6faf6 100%);
      line-height:1.7;
    }
    a{color:var(--accent);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:40;
      backdrop-filter: blur(14px);
      background:rgba(245,248,244,.84);
      border-bottom:1px solid rgba(216,231,216,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      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; box-shadow:var(--shadow-2)}
    .brand h2{margin:0; font-size:1.02rem; line-height:1.2}
    .brand p{margin:2px 0 0; font-size:.84rem; color:var(--muted)}
    .nav-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); padding:10px 12px; border-radius:12px}
    .nav-links{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:.95rem; color:var(--text); padding:8px 10px; border-radius:10px}
    .nav-links a:hover,.nav-links a:focus{background:var(--surface-2)}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:999px; border:1px solid transparent;
      font-weight:700; transition:.22s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#36e06f); color:#083018; box-shadow:0 12px 26px rgba(24,198,91,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 30px rgba(24,198,91,.28)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-secondary:hover{transform:translateY(-2px); border-color:#b7d7bc; box-shadow:var(--shadow-2)}
    .hero{
      padding:44px 0 24px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:24px; align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(135deg, rgba(255,255,255,.9), rgba(241,248,239,.95));
      border:1px solid rgba(216,231,216,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:30px;
      overflow:hidden;
      position:relative;
    }
    .hero-card::before,.hero-card::after{
      content:""; position:absolute; border-radius:50%;
      background:rgba(24,198,91,.10); filter:blur(2px);
    }
    .hero-card::before{width:180px;height:180px; right:-60px; top:-40px}
    .hero-card::after{width:130px;height:130px; right:55px; bottom:-50px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:7px 12px;
      border-radius:999px; background:#e8f8ec; color:var(--accent); font-size:.9rem; font-weight:700;
      border:1px solid #cfe9d3;
    }
    h1{margin:16px 0 12px; font-size:clamp(2rem, 4vw, 3.7rem); line-height:1.12; letter-spacing:-.02em}
    .hero p{margin:0; color:var(--muted); font-size:1.02rem; max-width:62ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .point{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px;
    }
    .point strong{display:block; font-size:1.02rem}
    .point span{display:block; margin-top:4px; color:var(--muted); font-size:.92rem}
    .hero-side{
      display:grid; gap:16px;
    }
    .quick-panel,.metrics,.service-tags,.price-box,.timeline-box,.help-box,.form-card,.review-card,.case-card,.compare-card,.faq-card,.article-card,.network-card,.about-card,.skills-card{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow-2);
    }
    .quick-panel{padding:22px}
    .quick-panel h3,.section-title h2{margin:0 0 10px; font-size:1.55rem}
    .quick-panel p{margin:0 0 14px; color:var(--muted)}
    .mini-list{display:grid; gap:10px}
    .mini-list div{display:flex; align-items:flex-start; gap:10px; padding:10px 0; border-top:1px dashed #dfeadd}
    .mini-list div:first-child{border-top:none; padding-top:0}
    .badge{display:inline-flex; align-items:center; gap:6px; font-size:.82rem; font-weight:700; color:var(--accent); background:#edf9f0; padding:6px 10px; border-radius:999px}
    .section{padding:22px 0}
    .section-title{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:16px}
    .section-title p{margin:0; color:var(--muted); max-width:68ch}
    .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}
    .metrics{padding:18px}
    .metrics .num{font-size:1.9rem; font-weight:900; color:var(--accent)}
    .metrics p{margin:8px 0 0; color:var(--muted)}
    .card{padding:20px}
    .card h3{margin:10px 0 8px; font-size:1.08rem}
    .card p{margin:0; color:var(--muted)}
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg,#e8f9ed,#d7f3df); color:var(--accent); font-weight:900;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:10px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:var(--text); font-size:.92rem}
    .flow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{
      padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff, #f7fbf7); border:1px solid var(--line); position:relative;
    }
    .step b{display:inline-flex; width:34px; height:34px; border-radius:50%; align-items:center; justify-content:center; background:#e8f8ec; color:var(--accent); margin-bottom:10px}
    .table-wrap{overflow:auto; border-radius:18px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:14px 14px; text-align:left; border-bottom:1px solid #edf2ee; vertical-align:top}
    th{background:#f3faf4; color:#0e311a; font-size:.95rem}
    td{color:#24402b}
    tr:hover td{background:#fbfefb}
    .rating{display:flex; align-items:center; gap:10px; flex-wrap:wrap}
    .stars{color:#12ad4f; letter-spacing:2px; font-size:1.05rem}
    details{
      background:#fff; border:1px solid var(--line); border-radius:16px; padding:0 16px;
      box-shadow:var(--shadow-2)
    }
    details summary{cursor:pointer; padding:16px 0; font-weight:700; list-style:none}
    details summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px; color:var(--muted)}
    .reviews .review-card,.case-card,.article-card,.network-card,.about-card,.skills-card,.help-box,.form-card,.price-box,.timeline-box,.faq-card{padding:20px}
    .review-meta{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:12px}
    .avatar{width:42px; height:42px; border-radius:50%; background:linear-gradient(135deg,#dff6e6,#bfeccc); display:grid; place-items:center; color:var(--accent); font-weight:900}
    .quote{color:var(--muted); margin:0}
    .case-thumb{
      width:100%; aspect-ratio:16/9; border-radius:16px; overflow:hidden; background:#eef7ef; margin-bottom:14px;
    }
    .case-thumb img{width:100%; height:100%; object-fit:cover}
    .list{margin:0; padding-left:18px; color:var(--muted)}
    .list li{margin:8px 0}
    .timeline{display:grid; gap:12px}
    .timeline-item{display:flex; gap:14px; align-items:flex-start; padding:14px; border-radius:16px; background:#fff; border:1px solid var(--line)}
    .timeline-item .dot{width:12px; height:12px; border-radius:50%; margin-top:7px; background:var(--brand); box-shadow:0 0 0 6px rgba(24,198,91,.12)}
    .price-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .price{padding:20px; border-radius:20px; background:linear-gradient(180deg,#fff,#f7fbf7); border:1px solid var(--line)}
    .price strong{display:block; font-size:1.4rem; color:var(--accent); margin:8px 0}
    .support-grid{display:grid; grid-template-columns:1fr 1fr; gap:16px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    input,select,textarea{
      width:100%; padding:13px 14px; border:1px solid #cfe0d0; border-radius:14px; background:#fff; color:var(--text); outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--brand); box-shadow:0 0 0 4px rgba(24,198,91,.12)}
    .full{grid-column:1 / -1}
    .footer{
      margin-top:24px; padding:24px 0 18px; border-top:1px solid var(--line); background:#eff6ef;
      color:var(--text);
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:16px; align-items:start}
    .footer small,.footer p,.footer a{color:var(--text)}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 10px; border-radius:999px; background:#fff; border:1px solid var(--line)}
    .fixed-actions{
      position:fixed; right:16px; bottom:16px; z-index:50; display:grid; gap:10px;
    }
    .fab,.top-btn{
      width:52px; height:52px; border-radius:50%; border:none; display:grid; place-items:center; box-shadow:var(--shadow);
      background:linear-gradient(135deg,var(--brand),#43e477); color:#083018; font-weight:900; cursor:pointer
    }
    .top-btn{background:#fff; border:1px solid var(--line)}
    .fab-panel{
      position:absolute; right:0; bottom:64px; width:min(280px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:14px; box-shadow:var(--shadow);
      display:none;
    }
    .fab-panel.open{display:block}
    .fab-panel img{width:100%; border-radius:14px; margin:10px 0}
    .scroll-reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .scroll-reveal.visible{opacity:1; transform:none}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.flow,.price-grid,.support-grid,.grid-3{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:16px; right:16px; top:70px; background:#fff; border:1px solid var(--line);
        border-radius:18px; padding:12px; box-shadow:var(--shadow); flex-direction:column; align-items:stretch;
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 12px}
      .hero{padding-top:22px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.flow,.price-grid,.support-grid,.footer-grid,.hero-points,.form-grid{grid-template-columns:1fr}
      .hero-card{padding:22px}
      .section-title{flex-direction:column; align-items:flex-start}
      .mobile-only{display:inline-flex}
      .desktop-only{display:none}
      .fixed-actions{right:12px; bottom:12px}
    }