:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f3f6ff;
      --text:#172033;
      --muted:#5c667a;
      --line:#e4e8f2;
      --primary:#5a62ff;
      --primary-2:#00b3a8;
      --accent:#ff7a59;
      --warm:#fff4e8;
      --shadow:0 14px 40px rgba(19, 32, 61, .08);
      --shadow-2:0 10px 30px rgba(73, 84, 139, .14);
      --radius:18px;
      --radius-sm:14px;
      --container: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 20% 0%, rgba(90,98,255,.10), transparent 28%),
        radial-gradient(circle at 90% 10%, rgba(0,179,168,.10), transparent 22%),
        linear-gradient(180deg,#ffffff 0%,#f7f8fc 22%,#f6f8ff 100%);
      line-height:1.65;
    }
    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(180%) blur(14px);
      background:rgba(247,248,252,.84);
      border-bottom:1px solid rgba(228,232,242,.8);
    }
    .nav{
      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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 6px 18px rgba(16,24,40,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;letter-spacing:.5px}
    .brand-text span{display:block;font-size:.85rem;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav-links a{font-size:.95rem;color:var(--text);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:#eef2ff;color:var(--primary)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:11px 18px;
      font-weight:700;cursor:pointer;transition:.25s;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#7b5cff);color:#fff;box-shadow:0 10px 24px rgba(90,98,255,.24)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 30px rgba(90,98,255,.3)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#c9d2f6;transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px;align-items:center;justify-content:center}
    .hero{
      padding:42px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.soft-card,.price-card,.review-card,.case-card,.faq-item,.form-card,.article-card,.compare-card,.stat-card,.process-step,.service-card,.timeline-item{
      background:var(--panel);border:1px solid rgba(228,232,242,.9);border-radius:var(--radius);box-shadow:var(--shadow);
    }
    .hero-main{
      padding:34px;position:relative;overflow:hidden;
      background:
        linear-gradient(135deg, rgba(90,98,255,.08), rgba(0,179,168,.07)),
        linear-gradient(180deg,#fff,#fbfcff);
    }
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;right:-80px;top:-70px;background:radial-gradient(circle, rgba(255,122,89,.22), transparent 60%)}
    .hero-main:after{width:180px;height:180px;right:80px;bottom:-80px;background:radial-gradient(circle, rgba(0,179,168,.16), transparent 62%)}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(90,98,255,.1);color:var(--primary);padding:8px 12px;border-radius:999px;font-weight:700;font-size:.88rem}
    h1{margin:16px 0 12px;font-size:clamp(2rem,5vw,3.5rem);line-height:1.1;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:1.02rem;max-width:56ch}
    .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:26px}
    .point{
      padding:14px 14px 13px;border-radius:16px;background:rgba(255,255,255,.74);border:1px solid rgba(228,232,242,.9)
    }
    .point strong{display:block;font-size:1.03rem}
    .point span{display:block;color:var(--muted);font-size:.9rem;margin-top:4px}
    .hero-side{padding:20px;background:linear-gradient(180deg,#ffffff,#f7faff)}
    .hero-side h2{margin:0 0 10px;font-size:1.15rem}
    .hero-side ul{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .hero-side li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
    .dot{width:10px;height:10px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--primary-2));margin-top:8px;flex:none}
    .section{padding:18px 0 8px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.65rem}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .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}
    .stat-card,.service-card,.review-card,.case-card,.article-card,.price-card,.compare-card,.soft-card,.form-card{padding:20px}
    .stat-card{background:linear-gradient(180deg,#fff,#f9fbff)}
    .stat-card strong{display:block;font-size:1.8rem;line-height:1}
    .stat-card span{display:block;margin-top:8px;color:var(--muted)}
    .service-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3{margin:0 0 8px;font-size:1.08rem}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .tag{padding:6px 10px;border-radius:999px;background:#f2f5ff;color:#44507a;font-size:.85rem;border:1px solid #e4e8f7}
    .service-card p,.case-card p,.review-card p,.article-card p,.price-card p,.soft-card p{margin:0;color:var(--muted)}
    .feature-list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:9px}
    .feature-list li{display:flex;gap:10px;color:var(--text)}
    .feature-list li:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:9px;flex:none}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{padding:18px}
    .timeline-item .num{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:12px;background:linear-gradient(135deg,rgba(90,98,255,.14),rgba(0,179,168,.16));color:var(--primary);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:780px}
    th,td{padding:14px 14px;text-align:left;border-bottom:1px solid #edf1f7;vertical-align:top}
    th{background:#f7f9ff;font-weight:800}
    tr:last-child td{border-bottom:none}
    .rating{
      display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:8px
    }
    .stars{color:#ff9f2e;letter-spacing:2px;font-size:1.1rem}
    .highlight-box{
      padding:18px;border-radius:18px;background:linear-gradient(135deg, rgba(255,122,89,.08), rgba(90,98,255,.08));border:1px solid rgba(228,232,242,.9)
    }
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:none;border:none;text-align:left;font-size:1rem;font-weight:800;color:var(--text);display:flex;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);display:none}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .chev{transform:rotate(180deg)}
    .chev{transition:.25s;color:var(--muted)}
    .comments-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card .role{display:inline-flex;padding:6px 10px;border-radius:999px;background:#f5f7ff;color:#4a57a8;font-size:.84rem;font-weight:700;margin-bottom:12px}
    .review-card .meta{margin-top:12px;color:var(--muted);font-size:.9rem}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card .date{font-size:.88rem;color:var(--muted);margin-top:12px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-weight:700;font-size:.94rem}
    input,select,textarea{
      width:100%;border:1px solid #dfe5f2;border-radius:14px;background:#fff;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s
    }
    input:focus,select:focus,textarea:focus{border-color:#8b95ff;box-shadow:0 0 0 4px rgba(90,98,255,.12)}
    textarea{min-height:118px;resize:vertical}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
    .note{color:var(--muted);font-size:.92rem}
    .footer{
      margin-top:18px;padding:28px 0 24px;background:#eef2ff;border-top:1px solid #dde4f5;color:#23304a
    }
    .footer a{color:#253b86}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .footer small,.footer p{color:#42506a}
    .footer h3{margin:0 0 12px;font-size:1.05rem;color:#16213a}
    .footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}
    .footer-bottom{margin-top:18px;padding-top:16px;border-top:1px solid #d9e0f2;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    .float-box{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-box a,.float-box button{
      width:52px;height:52px;border-radius:16px;border:1px solid #d9e0f2;background:#fff;box-shadow:var(--shadow-2);display:flex;align-items:center;justify-content:center;cursor:pointer
    }
    .backtop{display:none}
    .floating-panel{
      position:fixed;right:16px;bottom:82px;z-index:59;width:min(320px, calc(100vw - 32px));
      background:#fff;border:1px solid #dfe5f2;border-radius:18px;box-shadow:var(--shadow);padding:14px;display:none
    }
    .floating-panel.open{display:block}
    .kefu-card{display:flex;gap:12px;align-items:center}
    .kefu-card img{width:90px;height:90px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .kefu-card strong{display:block}
    .kefu-card span{display:block;color:var(--muted);font-size:.9rem}
    .mobile-only{display:none}
    .image-strip{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .image-strip img,.square-img img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .sticky-anchors{display:flex;flex-wrap:wrap;gap:10px}
    .anchor-pill{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.9rem}
    .fade-up{animation:fadeUp .7s ease both}
    @keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.comments-grid,.articles,.footer-grid,.timeline,.image-strip{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .nav-cta .btn-ghost{display:none}
    }
    @media (max-width: 720px){
      .container{width:min(var(--container), calc(100% - 20px))}
      .hero{padding-top:20px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.comments-grid,.articles,.footer-grid,.timeline,.image-strip,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav{min-height:68px}
      .nav-cta .btn{padding:10px 14px}
      .stat-card,.service-card,.review-card,.case-card,.article-card,.price-card,.compare-card,.soft-card,.form-card,.timeline-item{padding:16px}
      .footer-links{grid-template-columns:1fr}
    }