:root{
      --bg:#12091f;
      --bg2:#1a1030;
      --card:#1d1235;
      --card2:#22183c;
      --line:rgba(255,255,255,.10);
      --text:#f3ecff;
      --muted:#c9bce6;
      --pink:#ff4fd8;
      --violet:#8f5bff;
      --cyan:#53e0ff;
      --gold:#ffd37a;
      --shadow:0 18px 50px rgba(0,0,0,.28);
      --radius:18px;
      --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",sans-serif;background:
      radial-gradient(circle at 10% 10%, rgba(255,79,216,.15), transparent 24%),
      radial-gradient(circle at 90% 15%, rgba(83,224,255,.12), transparent 20%),
      linear-gradient(180deg,var(--bg) 0%, #120d24 42%, #0f0a1b 100%);
      color:var(--text);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}
    header{position:sticky;top:0;z-index:50;background:rgba(16,10,29,.74);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.08)}
    .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;border-radius:12px;object-fit:contain;background:#fff;padding:4px;box-shadow:0 10px 24px rgba(255,79,216,.18)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;letter-spacing:.08em}
    .brand-text span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#e9ddff;opacity:.9}
    .nav-links a:hover,.nav-links a:focus{color:#fff}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:11px 16px;font-weight:700;border:1px solid transparent;transition:.25s ease;cursor:pointer}
    .btn{background:linear-gradient(135deg,var(--pink),var(--violet));color:#fff;box-shadow:0 14px 28px rgba(255,79,216,.18)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 18px 32px rgba(255,79,216,.26)}
    .btn-outline{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12);color:#fff}
    .btn-outline:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.28)}
    .menu-toggle{display:none}
    main{overflow:hidden}
    section{padding:72px 0}
    .hero{padding:64px 0 54px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.panel,.faq-item,.review,.article,.timeline li,.price-box,.compare-box,.form-box{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.03));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy:before{content:"";position:absolute;inset:-2px;background:radial-gradient(circle at 20% 10%,rgba(255,79,216,.18),transparent 28%),radial-gradient(circle at 80% 0%,rgba(83,224,255,.14),transparent 26%);pointer-events:none}
    .hero-copy > *{position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.09);color:#f5eaff;font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,54px);line-height:1.08}
    .lead{font-size:16px;color:var(--muted);max-width:62ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 18px}
    .trust{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);font-size:13px;color:#efe7ff}
    .hero-panel{padding:26px;display:grid;gap:16px}
    .metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric{padding:18px;border-radius:16px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08)}
    .metric strong{display:block;font-size:26px;color:#fff}
    .metric span{font-size:13px;color:var(--muted)}
    .hero-note{padding:16px;border-radius:16px;background:rgba(83,224,255,.08);border:1px solid rgba(83,224,255,.18);color:#e8fbff}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:24px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,36px)}
    .section-head p{margin:0;color:var(--muted);max-width:60ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card,.panel,.compare-box,.form-box{padding:22px}
    .card h3,.panel h3,.review h3,.article h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p,.article p,.faq-item p{margin:0;color:var(--muted)}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,79,216,.18),rgba(83,224,255,.16));border:1px solid rgba(255,255,255,.08);margin-bottom:14px}
    .subtle{color:#f0d9ff}
    .timeline{margin:0;padding:0;list-style:none;display:grid;gap:12px}
    .timeline li{padding:18px 18px 18px 20px;position:relative}
    .timeline li:before{content:"";position:absolute;left:10px;top:24px;width:8px;height:8px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 4px rgba(255,79,216,.18)}
    .timeline strong{display:block;margin-bottom:6px}
    .table-wrap{overflow:auto;border-radius:16px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:760px;background:rgba(255,255,255,.04)}
    th,td{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.08);text-align:left;vertical-align:top;color:#f5efff}
    th{background:rgba(255,255,255,.06)}
    td{color:var(--muted)}
    .rating{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
    .stars{color:var(--gold);letter-spacing:2px}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 20px;background:transparent;border:0;color:#fff;font-size:16px;font-weight:700;cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-item.open .faq-a{max-height:220px;padding-bottom:18px}
    .reviews,.articles,.pricing,.service-net,.tag-cloud{display:grid;gap:16px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .review .role{font-size:13px;color:#ead9ff}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:rgba(255,79,216,.12);color:#ffdff7;font-size:12px;border:1px solid rgba(255,79,216,.18)}
    .articles .article{display:grid;gap:10px}
    .article .more{color:#ffd7fb;font-weight:700}
    .pricing{grid-template-columns:repeat(3,minmax(0,1fr))}
    .price-box ul{margin:14px 0 0;padding-left:18px;color:var(--muted)}
    .service-net{grid-template-columns:repeat(4,minmax(0,1fr))}
    .tag-cloud{grid-template-columns:repeat(5,minmax(0,1fr))}
    .tag{padding:12px 14px;border-radius:14px;text-align:center;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);color:#f4e9ff}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;color:#f2e8ff}
    input,select,textarea{width:100%;border-radius:14px;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.04);padding:13px 14px;color:#fff;outline:none}
    textarea{min-height:120px;resize:vertical}
    input::placeholder,textarea::placeholder{color:#bcaed9}
    input:focus,select:focus,textarea:focus{border-color:rgba(255,79,216,.45);box-shadow:0 0 0 4px rgba(255,79,216,.12)}
    footer{padding:28px 0 34px;border-top:1px solid rgba(255,255,255,.08);background:rgba(10,7,18,.92)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:start}
    .footer-grid p,.footer-grid a{color:#d9caee}
    .footer-grid a:hover{color:#fff}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .fab{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--pink),var(--violet));color:#fff;box-shadow:var(--shadow);border:0}
    .kefu{position:fixed;left:16px;bottom:16px;z-index:60;background:rgba(20,12,38,.9);border:1px solid rgba(255,255,255,.10);border-radius:18px;padding:12px;display:grid;gap:10px;width:168px;box-shadow:var(--shadow)}
    .kefu img{border-radius:12px}
    .kefu span{font-size:12px;color:#eadcff}
    .reveal{opacity:0;transform:translateY(18px);transition:.65s ease}
    .reveal.visible{opacity:1;transform:none}
    .mobile-menu{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.pricing,.service-net,.tag-cloud,.footer-grid{grid-template-columns:1fr 1fr}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 760px){
      .nav-links,.nav-actions{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 16px}
      .mobile-menu.open{display:block}
      .mobile-menu .stack{display:grid;gap:10px;padding:14px 0 6px}
      .hero-grid,.grid-3,.grid-4,.pricing,.service-net,.tag-cloud,.footer-grid,.form-grid{grid-template-columns:1fr}
      section{padding:56px 0}
      .hero{padding-top:34px}
      .hero-copy{padding:24px}
      .metrics{grid-template-columns:1fr 1fr}
      .kefu{width:150px}
    }