:root{
      --bg:#f6f8fc;
      --bg2:#eef3fb;
      --card:#ffffff;
      --text:#10213a;
      --muted:#5f6f87;
      --line:#dbe4f0;
      --primary:#5a63ff;
      --primary2:#19c2ff;
      --accent:#8b5cf6;
      --gold:#f0b44c;
      --shadow:0 18px 50px rgba(24,40,82,.10);
      --shadow2:0 8px 24px rgba(24,40,82,.08);
      --radius:22px;
      --radius2:16px;
      --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(90,99,255,.11), transparent 28%),
        radial-gradient(circle at top right, rgba(25,194,255,.12), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 45%, #f5f8fd 100%);
      min-height:100vh;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:40;
      backdrop-filter:blur(16px);
      background:rgba(250,252,255,.78);
      border-bottom:1px solid rgba(219,228,240,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:78px;
    }
    .brand{display:flex; align-items:center; gap:14px; min-width:0}
    .brand .ai-page-logo{width:44px; height:44px; border-radius:12px; object-fit:contain; background:#fff; padding:6px; box-shadow:var(--shadow2)}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; letter-spacing:.4px}
    .brand-text span{display:block; font-size:12px; color:var(--muted); margin-top:3px}
    .nav-links{display:flex; flex-wrap:wrap; align-items:center; gap:10px 14px}
    .nav-links a{font-size:14px; color:var(--text); padding:9px 12px; border-radius:999px; transition:.25s ease}
    .nav-links a:hover{background:#edf2ff; color:#3447d4}
    .nav-cta{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:11px 18px;
      font-weight:600; cursor:pointer; transition:.25s ease; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff; box-shadow:0 14px 28px rgba(90,99,255,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 18px 36px rgba(90,99,255,.28)}
    .btn-ghost{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-ghost:hover{border-color:#b9c8e3; transform:translateY(-2px)}
    .menu-toggle{display:none; width:44px; height:44px; border-radius:12px; border:1px solid var(--line); background:#fff; align-items:center; justify-content:center}
    .menu-toggle span{width:18px; height:2px; background:var(--text); position:relative; display:block}
    .menu-toggle span::before,.menu-toggle span::after{content:""; position:absolute; left:0; width:18px; height:2px; background:var(--text)}
    .menu-toggle span::before{top:-6px}.menu-toggle span::after{top:6px}
    .hero{
      padding:42px 0 24px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.35fr .9fr; gap:22px; align-items:stretch;
    }
    .hero-main{
      padding:34px; border-radius:28px; background:
        linear-gradient(135deg, rgba(255,255,255,.90), rgba(244,248,255,.94)),
        radial-gradient(circle at 15% 15%, rgba(90,99,255,.16), transparent 28%),
        radial-gradient(circle at 82% 18%, rgba(25,194,255,.16), transparent 24%),
        radial-gradient(circle at 80% 82%, rgba(139,92,246,.14), transparent 24%);
      border:1px solid rgba(219,228,240,.9); box-shadow:var(--shadow);
      position:relative; overflow:hidden;
    }
    .hero-main::after{
      content:""; position:absolute; inset:auto -120px -120px auto; width:280px; height:280px; border-radius:50%;
      background:radial-gradient(circle, rgba(25,194,255,.22), transparent 68%);
      pointer-events:none;
    }
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:#eef4ff; color:#4052b8; font-size:13px; font-weight:600}
    h1{margin:18px 0 12px; font-size:clamp(32px, 5vw, 56px); line-height:1.08; letter-spacing:-.03em}
    .hero p{margin:0; font-size:16px; line-height:1.8; color:var(--muted); max-width:60ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-points{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:12px; margin-top:26px}
    .mini{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px;
      box-shadow:0 10px 20px rgba(24,40,82,.05)
    }
    .mini b{display:block; font-size:18px; margin-bottom:4px}
    .mini span{font-size:13px; color:var(--muted); line-height:1.6}
    .hero-side{
      display:grid; gap:14px; align-content:start;
    }
    .side-card{
      background:linear-gradient(180deg,#ffffff 0%, #f8fbff 100%);
      border:1px solid var(--line); border-radius:24px; padding:22px; box-shadow:var(--shadow2)
    }
    .side-card h2{font-size:18px; margin:0 0 10px}
    .side-card ul{margin:0; padding-left:18px; color:var(--muted); line-height:1.8}
    .side-card li{margin:5px 0}
    .metric-strip{
      margin-top:18px; display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:14px
    }
    .metric{
      background:rgba(255,255,255,.85); border:1px solid var(--line); border-radius:20px; padding:18px; box-shadow:var(--shadow2)
    }
    .metric strong{display:block; font-size:24px; line-height:1.1}
    .metric span{display:block; margin-top:6px; color:var(--muted); font-size:13px; line-height:1.6}
    section{padding:26px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:62ch; line-height:1.7}
    .grid-3{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:16px}
    .card{
      background:rgba(255,255,255,.9); border:1px solid var(--line); border-radius:var(--radius);
      padding:22px; box-shadow:var(--shadow2); transition:.25s ease
    }
    .card:hover{transform:translateY(-4px); box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px; font-size:18px}
    .card p{margin:0; color:var(--muted); line-height:1.75}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 14px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#334; font-size:13px}
    .timeline{display:grid; gap:12px}
    .step{display:grid; grid-template-columns:54px 1fr; gap:14px; align-items:start; padding:18px; border-radius:20px; border:1px solid var(--line); background:#fff}
    .step i{width:54px; height:54px; border-radius:18px; display:grid; place-items:center; font-style:normal; font-weight:700; color:#fff; background:linear-gradient(135deg,var(--primary),var(--accent))}
    .step b{display:block; margin-bottom:6px}
    .step span{color:var(--muted); line-height:1.7}
    .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:880px}
    th,td{padding:16px 18px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f6f8ff; font-size:14px}
    td{color:#324158; line-height:1.7}
    .highlight{color:#273bcb; font-weight:700}
    .badge{display:inline-flex; align-items:center; gap:6px; padding:7px 11px; border-radius:999px; background:#eef4ff; color:#3040b0; font-size:12px; font-weight:600}
    .review-grid{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; margin-bottom:12px}
    .review .role{color:var(--muted); font-size:13px}
    .stars{color:#f0b44c; letter-spacing:1px}
    .articles{display:grid; gap:12px}
    .article{
      display:flex; justify-content:space-between; gap:12px; align-items:center;
      padding:16px 18px; border-radius:18px; background:#fff; border:1px solid var(--line)
    }
    .article a{font-weight:600}
    .article span{color:var(--muted); font-size:13px}
    .form-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:16px}
    form{display:grid; gap:12px}
    label{display:grid; gap:8px; font-size:14px; color:#23324d}
    input,select,textarea{
      width:100%; padding:13px 14px; border-radius:14px; border:1px solid #ced8e6; background:#fff; color:var(--text);
      font:inherit; outline:none; transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#7b86ff; box-shadow:0 0 0 4px rgba(90,99,255,.12)}
    textarea{min-height:124px; resize:vertical}
    .helper-box{
      border-radius:24px; padding:22px; background:
        linear-gradient(135deg, rgba(90,99,255,.08), rgba(25,194,255,.08)),
        #fff; border:1px solid var(--line)
    }
    .helper-box h3{margin:0 0 10px}
    .helper-list{margin:0; padding-left:18px; color:var(--muted); line-height:1.8}
    .faq{display:grid; gap:12px}
    .faq-item{border:1px solid var(--line); border-radius:18px; background:#fff; overflow:hidden}
    .faq-q{
      width:100%; background:none; border:0; padding:18px 18px; text-align:left; font:inherit; color:var(--text);
      display:flex; align-items:center; justify-content:space-between; gap:10px; cursor:pointer
    }
    .faq-q span{font-weight:600}
    .faq-q i{font-style:normal; transition:.25s ease}
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; color:var(--muted); line-height:1.8; padding:0 18px}
    .faq-item.active .faq-a{padding:0 18px 18px; max-height:260px}
    .faq-item.active .faq-q i{transform:rotate(45deg)}
    .footer{
      margin-top:18px;
      padding:26px 0 34px;
      background:linear-gradient(180deg, rgba(245,248,253,0) 0%, #eef3fb 18%, #edf2f8 100%);
      border-top:1px solid rgba(219,228,240,.9);
      color:var(--text);
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:16px}
    .footer a{color:#2036b9}
    .footer small{color:var(--muted); line-height:1.7}
    .qr{display:flex; gap:14px; align-items:center}
    .qr img{width:110px; height:110px; object-fit:cover; border-radius:14px; border:1px solid var(--line); background:#fff}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:45; display:grid; gap:10px
    }
    .float-btn{
      width:48px; height:48px; border-radius:16px; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent)); color:#fff; box-shadow:0 16px 32px rgba(90,99,255,.24)
    }
    .float-panel{
      position:fixed; right:18px; bottom:78px; z-index:44; width:min(320px, calc(100vw - 36px));
      background:#fff; border:1px solid var(--line); border-radius:22px; box-shadow:var(--shadow); padding:16px;
      display:none
    }
    .float-panel.show{display:block}
    .float-panel h3{margin:0 0 10px; font-size:16px}
    .float-panel p{margin:0 0 12px; color:var(--muted); line-height:1.7; font-size:14px}
    .float-panel .contact-line{display:grid; gap:8px; font-size:14px}
    .reveal{opacity:0; transform:translateY(16px); transition:all .6s ease}
    .reveal.visible{opacity:1; transform:translateY(0)}
    .menu-panel{display:none}
    @media (max-width: 1100px){
      .hero-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
      .review-grid,.grid-3,.metric-strip,.hero-points{grid-template-columns:repeat(2, minmax(0,1fr))}
    }
    @media (max-width: 820px){
      .nav-links,.nav-cta{display:none}
      .menu-toggle{display:inline-flex}
      .menu-panel{display:none; padding:0 0 14px}
      .menu-panel.show{display:block}
      .menu-panel .panel-inner{
        display:grid; gap:8px; padding:14px 0 0
      }
      .menu-panel a,.menu-panel .btn{justify-content:flex-start; width:100%}
      .section-head{flex-direction:column; align-items:flex-start}
      .review-grid,.grid-3,.grid-2,.metric-strip,.hero-points{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .card,.side-card{padding:18px}
      .article{align-items:flex-start; flex-direction:column}
    }