:root{
      --bg:#fff7fb;
      --bg2:#fff0f6;
      --card:#ffffff;
      --text:#23162a;
      --muted:#6d5a6f;
      --line:#f1d4e0;
      --brand:#ff4d8d;
      --brand2:#c82d63;
      --accent:#7a5cff;
      --shadow:0 16px 40px rgba(184,56,104,.12);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#ffe5ef 0,#fff7fb 30%,#fff 100%);color:var(--text)}
    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:40;background:rgba(255,247,251,.88);backdrop-filter:blur(10px);border-bottom:1px solid rgba(241,212,224,.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:0 8px 20px rgba(255,77,141,.12)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#4d3550;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:#ffe1ec;color:var(--brand2)}
    .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:999px;padding:12px 18px;font-weight:700;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7db0);color:#fff;box-shadow:0 12px 26px rgba(255,77,141,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(255,77,141,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#f3a6bf;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:42px 0 20px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.panel,.review,.faq-item,.article,.metric,.service,.step,.compare,.timeline,.price,.network,.quote,.form-wrap{background:var(--card);border:1px solid rgba(241,212,224,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;background:rgba(255,77,141,.08);filter:blur(6px)}
    .hero-main:before{width:220px;height:220px;right:-70px;top:-60px}
    .hero-main:after{width:160px;height:160px;right:120px;bottom:-60px;background:rgba(122,92,255,.10)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#ffe3ee;color:var(--brand2);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.06}
    .lead{margin:0;color:#4c3c51;font-size:16px;line-height:1.9;max-width:60ch}
    .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 24px;padding:0;list-style:none}
    .hero-points li{padding:10px 14px;border-radius:999px;background:#fff4f8;color:#4b3044;border:1px solid #f5d4e2;font-size:14px}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px}
    .hero-side{padding:24px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{padding:18px}
    .metric .num{font-size:28px;font-weight:800;color:var(--brand2);line-height:1}
    .metric .txt{margin-top:8px;font-size:13px;color:var(--muted);line-height:1.6}
    .side-note{margin-top:16px;padding:16px;border-radius:18px;background:linear-gradient(135deg,#fff0f6,#fff);border:1px dashed #f3bfd0;color:#5a415a;line-height:1.8}
    .section{padding:18px 0 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:0 0 16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:58ch;line-height:1.8}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service,.step,.article,.review,.price,.network,.timeline,.compare,.panel{padding:20px}
    .service h3,.step h3,.article h3,.review h3,.price h3,.network h3,.timeline h3{margin:0 0 10px;font-size:18px}
    .service p,.step p,.article p,.review p,.price p,.network p,.timeline p{margin:0;color:var(--muted);line-height:1.8}
    .tagcloud{display:flex;flex-wrap:wrap;gap:10px}
    .tagcloud span{padding:9px 12px;border-radius:999px;background:#fff2f7;border:1px solid #f4ccdd;color:#5a3f56;font-size:13px}
    .timeline-list{display:grid;gap:12px}
    .timeline-item{display:flex;gap:14px;align-items:flex-start;padding:14px;border-radius:16px;background:#fff8fb;border:1px solid #f4d8e3}
    .dot{width:11px;height:11px;border-radius:50%;background:linear-gradient(135deg,var(--brand),#ff8db8);margin-top:6px;flex:0 0 auto}
    .table-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #f3e1e8;vertical-align:top}
    th{background:#fff4f8;color:#40253a}
    td{color:#4f3c52}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#eef2ff;color:#4c3b7a;font-size:12px;font-weight:700}
    .compare .rating{display:flex;align-items:center;gap:8px;margin:10px 0 14px;color:var(--brand2);font-weight:800}
    .stars{letter-spacing:2px}
    .faq-list{display:grid;gap:12px}
    .faq-item summary{list-style:none;cursor:pointer;font-weight:700;color:#35233b;padding:2px 0}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .ans{color:var(--muted);line-height:1.9;margin-top:10px}
    .review .meta{margin-top:14px;color:#7d6480;font-size:13px}
    .article .meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
    .form-wrap{padding:22px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:13px;font-weight:700;color:#533d55;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid #e7ccd8;border-radius:14px;padding:14px 14px;background:#fff;color:#2f1f30;font:inherit;outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#ff8ab4;box-shadow:0 0 0 4px rgba(255,77,141,.10)}
    textarea{min-height:126px;resize:vertical}
    .footer{margin-top:18px;padding:24px 0 28px;background:#fff3f8;border-top:1px solid var(--line);color:#503b53}
    .footer a{color:#7f2d57}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px}
    .mini{font-size:13px;color:var(--muted);line-height:1.8}
    .fixed-help{position:fixed;right:16px;bottom:16px;z-index:45;display:flex;flex-direction:column;gap:10px}
    .floating-btn{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),#ff84b1);color:#fff;box-shadow:0 14px 24px rgba(255,77,141,.28)}
    .backtop{position:fixed;right:16px;bottom:74px;z-index:45;opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .fade-up{opacity:0;transform:translateY(16px);transition:all .7s ease}
    .fade-up.visible{opacity:1;transform:none}
    .menu-panel{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 768px){
      .nav-links,.nav-actions{display:none}
      .menu-toggle{display:inline-flex}
      .menu-panel{display:block;max-height:0;overflow:hidden;transition:max-height .3s ease;background:#fff5f9;border-top:1px solid var(--line)}
      .menu-panel.open{max-height:520px}
      .menu-panel .inner{padding:12px 0 16px;display:grid;gap:8px}
      .menu-panel a{padding:10px 12px;border-radius:12px;background:#fff;border:1px solid #f4d8e3}
      .hero-grid,.grid-4,.grid-3,.footer-grid,form{grid-template-columns:1fr}
      .hero-main,.hero-side,.service,.step,.article,.review,.price,.network,.timeline,.compare,.panel,.form-wrap{padding:18px}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:34px}
    }