:root{
      --bg:#f6f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#142033;
      --muted:#5b6b84;
      --line:#dbe4f0;
      --brand:#5a67ff;
      --brand2:#12c2e9;
      --brand3:#8a5cff;
      --accent:#ffb547;
      --ok:#18a76d;
      --shadow:0 18px 50px rgba(25, 42, 86, .10);
      --shadow2:0 12px 28px rgba(25, 42, 86, .08);
      --radius:22px;
      --radius2:16px;
      --max: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;
      background:
        radial-gradient(circle at top left, rgba(90,103,255,.16), transparent 22%),
        radial-gradient(circle at top right, rgba(18,194,233,.14), transparent 18%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 36%, #f8fbff 100%);
      color:var(--text);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(255,255,255,.72);
      border-bottom:1px solid rgba(219,228,240,.8);
    }
    .topbar{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 8px 20px rgba(90,103,255,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem;letter-spacing:.3px}
    .brand-text span{display:block;font-size:.82rem;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;padding:10px 12px;font-size:14px}
    nav{display:flex;align-items:center;gap:16px}
    .nav-links{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.92rem;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{background:rgba(90,103,255,.10);color:var(--brand)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:.25s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);color:#fff;box-shadow:0 14px 28px rgba(90,103,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(90,103,255,.28)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    main{display:block}
    section{padding:76px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.84rem;font-weight:700;color:var(--brand)}
    .eyebrow::before{content:"";width:10px;height:10px;border-radius:999px;background:linear-gradient(135deg,var(--brand2),var(--brand3));box-shadow:0 0 0 6px rgba(90,103,255,.08)}
    h1,h2,h3{line-height:1.2;margin:0}
    h1{font-size:clamp(2rem,4vw,4rem);letter-spacing:-.03em}
    h2{font-size:clamp(1.5rem,2.8vw,2.3rem)}
    h3{font-size:1.15rem}
    p{margin:0;color:var(--muted)}
    .hero{padding:28px 0 64px;position:relative}
    .hero-inner{
      display:grid;grid-template-columns:1.18fr .82fr;gap:28px;align-items:stretch
    }
    .hero-card{
      position:relative;overflow:hidden;border-radius:28px;background:
        radial-gradient(circle at 20% 20%, rgba(90,103,255,.20), transparent 25%),
        radial-gradient(circle at 80% 0%, rgba(18,194,233,.18), transparent 18%),
        linear-gradient(135deg, #ffffff 0%, #f7f9ff 100%);
      border:1px solid rgba(219,228,240,.9);box-shadow:var(--shadow);padding:34px
    }
    .hero-card::after{
      content:"";position:absolute;inset:auto -80px -80px auto;width:210px;height:210px;border-radius:50%;
      background:radial-gradient(circle, rgba(138,92,255,.22), transparent 65%);
      pointer-events:none
    }
    .hero h1{max-width:10ch}
    .hero-lead{margin-top:16px;font-size:1.05rem;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .chip{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:999px;background:rgba(90,103,255,.08);color:#34466b;font-size:.88rem;border:1px solid rgba(90,103,255,.14)}
    .hero-side{
      display:grid;grid-template-rows:auto auto;gap:18px
    }
    .glass-card{
      background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(245,248,255,.92));
      border:1px solid rgba(219,228,240,.92);border-radius:24px;box-shadow:var(--shadow2);padding:22px
    }
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .metric{
      background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line);border-radius:20px;padding:18px;
      box-shadow:0 10px 22px rgba(26,42,86,.05)
    }
    .metric strong{display:block;font-size:1.5rem;color:var(--text)}
    .metric span{display:block;font-size:.88rem;color:var(--muted);margin-top:4px}
    .stat-list{display:grid;gap:12px;margin-top:12px}
    .stat-item{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:7px;background:linear-gradient(135deg,var(--brand2),var(--brand3))}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .card{
      background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow2);padding:24px;transition:.25s ease
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .feature-icon{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;color:#fff;font-weight:800;
      background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 12px 24px rgba(90,103,255,.20);margin-bottom:14px
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#30415f;font-size:.88rem}
    .section-bg{background:linear-gradient(180deg, rgba(255,255,255,.2), rgba(241,246,255,.9));border-top:1px solid rgba(219,228,240,.6);border-bottom:1px solid rgba(219,228,240,.6)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{position:relative}
    .step .num{font-size:.82rem;font-weight:800;color:var(--brand);margin-bottom:10px}
    .compare-wrap{overflow:auto;border-radius:24px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 18px;text-align:left;border-bottom:1px solid #edf2f8;vertical-align:top}
    th{background:#f7faff;color:#24324a;font-size:.92rem}
    td{color:#34435d}
    .check{color:var(--ok);font-weight:800}
    .score{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .score .stars{color:#ffb400;font-size:1.05rem;letter-spacing:2px}
    .highlight{
      padding:16px 18px;border-radius:18px;background:linear-gradient(135deg, rgba(90,103,255,.08), rgba(18,194,233,.10));
      border:1px solid rgba(90,103,255,.14)
    }
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:start;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline-item strong{color:var(--brand)}
    .pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .price{
      position:relative;overflow:hidden
    }
    .price .value{font-size:2rem;font-weight:900;color:var(--text);margin:8px 0}
    .price ul{padding-left:18px;margin:14px 0 0;color:var(--muted)}
    .reco{
      border:1px solid rgba(90,103,255,.24);
      background:linear-gradient(180deg,#fff, #f7f9ff);
      box-shadow:0 18px 40px rgba(90,103,255,.10)
    }
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .avatar{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand3));color:#fff;display:grid;place-items:center;font-weight:800}
    .faq{display:grid;gap:12px}
    .faq-item{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden;box-shadow:0 8px 20px rgba(25,42,86,.05)}
    .faq-q{
      width:100%;padding:18px 20px;background:transparent;border:0;color:var(--text);text-align:left;font-size:1rem;font-weight:700;
      display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer
    }
    .faq-q span{color:var(--brand)}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px;color:var(--muted)}
    .faq-item.open .faq-a{max-height:240px;padding-bottom:18px}
    .faq-item.open .icon{transform:rotate(45deg)}
    .icon{transition:.25s ease}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    form{display:grid;gap:14px}
    label{display:block;font-size:.92rem;font-weight:700;color:#2b3954;margin-bottom:7px}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;padding:13px 14px;
      outline:none;transition:.2s ease;font:inherit
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(90,103,255,.5);box-shadow:0 0 0 4px rgba(90,103,255,.10)}
    textarea{min-height:128px;resize:vertical}
    .submit-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .note{font-size:.88rem;color:var(--muted)}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .article-item{padding:16px 18px;border-radius:18px;background:#fff;border:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}
    .article-item small{display:block;color:var(--muted);margin-top:4px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    footer{
      background:linear-gradient(180deg,#152033 0%, #0f1727 100%);
      color:#d8e1f0;margin-top:0
    }
    footer a{color:#f0f5ff}
    .footer-inner{padding:36px 0}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}
    .footer-box{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:22px;padding:22px}
    .footer-box p,.footer-box li,.footer-box small{color:#c7d2e4}
    .footer-box ul{margin:12px 0 0;padding-left:18px}
    .kefu-float,.top-float{
      position:fixed;right:18px;z-index:60;display:grid;gap:10px
    }
    .kefu-float{bottom:18px}
    .top-float{bottom:124px}
    .float-btn{
      width:52px;height:52px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 26px rgba(90,103,255,.28);border:0;cursor:pointer
    }
    .float-panel{
      position:absolute;right:62px;bottom:0;width:min(280px, calc(100vw - 100px));
      background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:16px;display:none
    }
    .float-panel.open{display:block}
    .qr{display:grid;gap:10px}
    .qr img{width:100%;border-radius:14px;border:1px solid var(--line)}
    .fade-in{opacity:0;transform:translateY(16px);transition:.55s ease}
    .fade-in.show{opacity:1;transform:none}
    .muted{color:var(--muted)}
    .banner-img{border-radius:22px;border:1px solid var(--line);box-shadow:var(--shadow2)}
    .mini-list{display:grid;gap:10px}
    .mini-list div{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line)}
    @media (max-width: 980px){
      .hero-inner,.grid-3,.grid-2,.steps,.pricing,.reviews,.footer-grid,.form-grid,.article-list,.metrics{grid-template-columns:1fr 1fr}
      .hero-inner{grid-template-columns:1fr}
      .metrics{grid-template-columns:repeat(2,1fr)}
      .hero h1{max-width:none}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 720px){
      .nav-toggle{display:inline-flex}
      nav{position:relative}
      .nav-links{
        position:absolute;right:0;top:54px;min-width:min(92vw,420px);
        background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px;
        display:none;flex-direction:column;align-items:stretch;gap:6px
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px;background:#f7faff}
      .topbar{padding:12px 0}
      section{padding:62px 0}
      .hero-card{padding:24px}
      .hero-actions,.hero-badges,.submit-row,.footer-links{flex-direction:column;align-items:stretch}
      .grid-3,.grid-2,.steps,.pricing,.reviews,.footer-grid,.form-grid,.article-list,.metrics{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .kefu-float,.top-float{right:12px}
      .float-panel{width:min(270px, calc(100vw - 86px))}
    }