:root{
      --bg:#f7f4ef;
      --bg2:#fffaf3;
      --card:#ffffff;
      --text:#1d2433;
      --muted:#5d6678;
      --line:#e8dfd2;
      --brand:#ff4d6d;
      --brand2:#4c6fff;
      --brand3:#ff9f1c;
      --shadow:0 18px 45px rgba(25, 34, 52, .08);
      --shadow2:0 10px 26px rgba(255, 77, 109, .12);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,109,.10), transparent 24%),
        radial-gradient(circle at 85% 10%, rgba(76,111,255,.08), transparent 28%),
        linear-gradient(180deg, var(--bg2), var(--bg));
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(12px);
      background:rgba(255,250,243,.82);
      border-bottom:1px solid rgba(232,223,210,.8);
    }
    .header-inner,.nav-wrap,.hero-inner,.metrics,.split,.grid-3,.grid-4,.footer-grid,.topline,.service-rail{display:flex;gap:18px}
    .header-inner{align-items:center;justify-content:space-between;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:var(--shadow2)}
    .brand strong{display:block;font-size:1.02rem}
    .brand span{display:block;font-size:.84rem;color:var(--muted)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    nav{display:flex;align-items:center;gap:14px}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
    .nav-links a{
      font-size:.93rem;color:#314055;
      padding:9px 11px;border-radius:999px;border:1px solid transparent;
      transition:.2s ease;
    }
    .nav-links a:hover,.nav-links a:focus{background:#fff;border-color:var(--line);transform:translateY(-1px)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:.22s ease;cursor:pointer;line-height:1;
      box-shadow:var(--shadow2);
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line);box-shadow:none}
    .btn:hover{transform:translateY(-2px)}
    .hero{padding:30px 0 18px}
    .hero-inner{
      align-items:stretch;justify-content:space-between;flex-wrap:wrap;
      background:linear-gradient(135deg, rgba(255,255,255,.92), rgba(255,241,244,.88));
      border:1px solid rgba(255,77,109,.10);
      border-radius:28px;padding:24px;box-shadow:var(--shadow);position:relative;overflow:hidden;
    }
    .hero-inner:before,.hero-inner:after{
      content:"";position:absolute;border-radius:50%;pointer-events:none
    }
    .hero-inner:before{width:240px;height:240px;background:rgba(76,111,255,.10);right:-60px;top:-80px}
    .hero-inner:after{width:180px;height:180px;background:rgba(255,159,28,.12);left:-70px;bottom:-80px}
    .hero-copy{flex:1 1 520px;min-width:0;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#324159;font-size:.88rem;margin-bottom:14px}
    h1{margin:0 0 14px;font-size:clamp(2rem,4vw,3.5rem);line-height:1.1;letter-spacing:-.02em}
    .lead{font-size:1.06rem;line-height:1.8;color:var(--muted);margin:0 0 18px;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}
    .hero-notes{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .pill{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.9rem;color:#344055}
    .hero-panel{flex:0 1 360px;min-width:290px;align-self:stretch;background:linear-gradient(180deg,#fff,#fff8f8);border:1px solid var(--line);border-radius:24px;padding:18px;z-index:1}
    .mini-stat{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px}
    .stat strong{display:block;font-size:1.35rem}
    .stat span{font-size:.86rem;color:var(--muted)}
    section{padding:22px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
    .section-head h2{margin:0;font-size:1.6rem}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.75}
    .card{
      background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--radius);
      box-shadow:var(--shadow);padding:18px;transition:.22s ease;
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 20px 42px rgba(25,34,52,.11)}
    .grid-3,.grid-4{display:grid;gap:16px}
    .grid-3{grid-template-columns:repeat(3,1fr)}
    .grid-4{grid-template-columns:repeat(4,1fr)}
    .metrics .card strong{display:block;font-size:1.7rem;margin-bottom:6px}
    .metrics .card span{color:var(--muted)}
    .badge{display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;background:#fff4f7;color:#b11f46;border:1px solid #ffd0db;font-size:.84rem;margin-bottom:10px}
    .feature-list,.timeline,.faq-list,.article-list,.tag-cloud,.service-list{display:grid;gap:12px}
    .feature-item,.article-item,.faq-item,.timeline-item,.review-item{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px
    }
    .feature-item h3,.article-item h3,.review-item h3{margin:0 0 8px;font-size:1.05rem}
    .feature-item p,.article-item p,.review-item p,.timeline-item p{margin:0;color:var(--muted);line-height:1.75}
    .split{align-items:start;display:grid;grid-template-columns:1.05fr .95fr;gap:18px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#fff6f0;color:#2a3242;font-size:.95rem}
    td{color:#394659}
    .highlight-row td{background:#fff9fb;font-weight:700}
    .progress{height:10px;background:#f0e7de;border-radius:999px;overflow:hidden}
    .progress > span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:999px}
    .timeline{grid-template-columns:repeat(4,1fr)}
    .timeline-item{position:relative;min-height:132px}
    .timeline-item .step{font-weight:800;color:var(--brand);margin-bottom:8px}
    .review-item .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .stars{color:#ff9f1c;letter-spacing:2px}
    details.faq-item summary{cursor:pointer;font-weight:700;list-style:none}
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item[open]{border-color:#ffb5c4;box-shadow:var(--shadow2)}
    details.faq-item .answer{margin-top:10px;color:var(--muted);line-height:1.8}
    .articles-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .article-meta{display:flex;gap:10px;flex-wrap:wrap;color:#7a8497;font-size:.9rem;margin-top:10px}
    .tag-cloud{grid-template-columns:repeat(4,minmax(0,1fr))}
    .tag{padding:12px 14px;border-radius:14px;background:linear-gradient(180deg,#fff,#fff7f3);border:1px solid var(--line);text-align:center;font-weight:700;color:#344055}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    input,select,textarea{
      width:100%;border:1px solid #dcd3c6;background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#ff91a5;box-shadow:0 0 0 4px rgba(255,77,109,.09)}
    .form-full{grid-column:1/-1}
    .form-card .btn{width:100%}
    .side-panel{background:linear-gradient(180deg,#fff, #fff7fa);border:1px solid var(--line);border-radius:22px;padding:18px}
    .service-rail{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .service-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
    .service-box strong{display:block;margin-bottom:8px}
    .footer{
      margin-top:8px;padding:22px 0 28px;border-top:1px solid rgba(232,223,210,.85);
      background:rgba(255,250,243,.86);color:#2b3443
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px;align-items:start}
    .footer a{color:#2b4dd6}
    .footer small,.footer p{color:#516072;line-height:1.8}
    .float-bar{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px;
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),#ff835c);color:#fff;box-shadow:var(--shadow2);cursor:pointer
    }
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .kefu-card{
      position:fixed;right:16px;bottom:84px;z-index:61;width:280px;max-width:calc(100vw - 32px);
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:14px;
      display:none
    }
    .kefu-card.show{display:block;animation:fadeUp .22s ease}
    .kefu-card img{border-radius:16px;border:1px solid var(--line)}
    .kefu-card .close{position:absolute;top:10px;right:10px;border:none;background:#fff;border-radius:999px;cursor:pointer}
    .to-top{display:none}
    .to-top.show{display:grid}
    .nav-panel{display:none}
    .anchor{scroll-margin-top:96px}
    .center{text-align:center}
    @keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.visible{opacity:1;transform:translateY(0)}
    @media (max-width: 980px){
      .grid-4,.grid-3,.split,.timeline,.articles-grid,.footer-grid{grid-template-columns:1fr 1fr}
      .tag-cloud{grid-template-columns:repeat(2,minmax(0,1fr))}
      nav{display:none}
      .menu-btn{display:inline-flex}
      .nav-panel{display:block;max-height:0;overflow:hidden;transition:max-height .3s ease;border-top:1px solid transparent}
      .nav-panel.open{max-height:520px;border-top-color:var(--line)}
      .nav-panel .nav-links{padding:12px 0 4px}
    }
    @media (max-width: 720px){
      .grid-4,.grid-3,.split,.timeline,.articles-grid,.footer-grid,.form-grid,.mini-stat,.service-rail{grid-template-columns:1fr}
      .hero-inner{padding:18px}
      .hero-panel{min-width:0}
      .header-inner{gap:12px}
      .brand strong{font-size:.98rem}
      .brand span{font-size:.8rem}
      h1{font-size:1.9rem}
      .lead{font-size:1rem}
      .float-bar{right:12px;bottom:12px}
    }