:root{
      --bg:#fff8f7;
      --bg2:#fff2f2;
      --card:#ffffff;
      --line:#f0d7d7;
      --text:#2d1f22;
      --muted:#6d5860;
      --accent:#f04f8c;
      --accent2:#ff7aa8;
      --accent3:#b91f59;
      --shadow:0 18px 40px rgba(176, 56, 95, .10);
      --radius:20px;
      --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(255,122,168,.16), transparent 28%),
        radial-gradient(circle at 80% 10%, rgba(240,79,140,.12), transparent 26%),
        linear-gradient(180deg,var(--bg),#fff);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(255,248,247,.82);
      border-bottom:1px solid rgba(240,215,215,.85);
    }
    .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;border:1px solid var(--line);padding:4px}
    .brand h1{font-size:18px;line-height:1.1;margin:0}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .navlinks{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;align-items:center}
    .navlinks a{
      font-size:14px;color:#49353d;padding:8px 10px;border-radius:999px;transition:.25s;
    }
    .navlinks a:hover,.navlinks a:focus{background:#fff;border-color:var(--line);box-shadow:var(--shadow)}
    .nav-actions{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:14px;padding:12px 16px;
      font-weight:700;transition:.25s;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent3));color:#fff;box-shadow:0 14px 30px rgba(240,79,140,.24)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .menu-toggle{display:none}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.faq-item,.form-card,.testimonial,.article,.compare,.timeline-item,.price-box{
      background:var(--card);border:1px solid rgba(240,215,215,.9);border-radius:var(--radius);box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:999px;pointer-events:none;
      background:linear-gradient(135deg, rgba(240,79,140,.16), rgba(255,122,168,.06));
    }
    .hero-main:before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-main:after{width:120px;height:120px;right:130px;bottom:-40px}
    .badge{display:inline-flex;align-items:center;gap:8px;background:rgba(240,79,140,.10);color:var(--accent3);padding:7px 12px;border-radius:999px;font-size:13px;font-weight:700}
    .hero h2{font-size:clamp(32px,4vw,54px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:62ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff6f8);border:1px solid var(--line)}
    .stat strong{display:block;font-size:22px;color:var(--accent3)}
    .stat span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:16px}
    .hero-side .mini{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff8fb,#fff);border:1px solid var(--line)
    }
    .mini h3{margin:0 0 8px;font-size:16px}
    .mini ul{margin:0;padding-left:18px;color:var(--muted)}
    .mini li{margin:6px 0}
    .section{padding:14px 0 0}
    .section h3,.section h2{margin:0 0 12px}
    .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:72ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .card{padding:18px}
    .card h4{margin:8px 0 8px;font-size:17px}
    .card p,.card li{color:var(--muted);margin:0}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(240,79,140,.14), rgba(255,122,168,.08));color:var(--accent3);font-weight:900
    }
    .pill-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#5e464e;font-size:13px}
    .dual{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .list-check{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .list-check li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
    .list-check li:before{content:"✓";color:var(--accent3);font-weight:900}
    .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 12px;border-bottom:1px solid #f4e1e1;text-align:left;vertical-align:top}
    th{background:#fff6f8;color:#3a232b}
    .score{color:var(--accent3);font-weight:800}
    details{background:#fff;border-radius:16px;border:1px solid var(--line);padding:0 16px}
    summary{cursor:pointer;padding:16px 0;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px;color:var(--muted)}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .testimonial .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .tag{font-size:12px;color:var(--accent3);background:rgba(240,79,140,.10);padding:5px 10px;border-radius:999px}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:18px;display:grid;grid-template-columns:80px 1fr;gap:14px;align-items:start}
    .timeline-item strong{color:var(--accent3)}
    .pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price-box{padding:20px}
    .price-box .num{font-size:30px;font-weight:900;color:var(--accent3)}
    .form-card{padding:22px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:grid;gap:8px;font-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid #e9d5d8;border-radius:14px;background:#fff;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(240,79,140,.65);box-shadow:0 0 0 4px rgba(240,79,140,.08)}
    .full{grid-column:1/-1}
    .footer{
      margin-top:18px;padding:26px 0 18px;border-top:1px solid rgba(240,215,215,.9);
      background:linear-gradient(180deg, rgba(255,248,247,.6), rgba(255,244,246,.95));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .footer a{color:#4a2d36}
    .footer small,.footer p{color:var(--muted)}
    .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-help{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .fixed-help a,.backtop{
      width:50px;height:50px;border-radius:16px;display:grid;place-items:center;
      box-shadow:0 14px 28px rgba(176,56,95,.16);background:linear-gradient(135deg,var(--accent),var(--accent3));color:#fff;border:0
    }
    .backtop{cursor:pointer}
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.dual,.pricing,.footer-grid,.faq-grid{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .nav{flex-wrap:wrap}
      .navlinks{display:none;width:100%}
      .navlinks.open{display:flex}
      .menu-toggle{display:inline-flex}
      .mobile-only{display:inline-flex}
      .hero-main{padding:24px}
      .hero-stats{grid-template-columns:1fr}
    }