:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f2f6ff;
      --text:#1f2a37;
      --muted:#5b6576;
      --line:#e4e8f1;
      --brand1:#6a5cff;
      --brand2:#ff6b6b;
      --brand3:#25c2a0;
      --brand4:#f7b731;
      --shadow:0 16px 40px rgba(31,42,55,.08);
      --radius:22px;
      --radius-sm:16px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(106,92,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(255,107,107,.08), transparent 24%),
        linear-gradient(180deg,#ffffff 0%, #f8faff 34%, #f5f7fc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:40;
      backdrop-filter:blur(14px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(228,232,241,.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; box-shadow:0 8px 20px rgba(31,42,55,.08)}
    .brand-text{display:flex; flex-direction:column; line-height:1.15}
    .brand-text strong{font-size:18px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap}
    .nav-links a{font-size:14px; color:#344054; padding:8px 0; position:relative}
    .nav-links a::after{content:""; position:absolute; left:0; bottom:2px; width:0; height:2px; background:linear-gradient(90deg,var(--brand1),var(--brand2)); transition:.25s}
    .nav-links a:hover::after{width:100%}
    .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:11px 18px; font-weight:700; cursor:pointer;
      transition:.25s ease; white-space:nowrap;
    }
    .btn-primary{color:#fff; background:linear-gradient(135deg,var(--brand1),#7f8cff 46%,var(--brand2))}
    .btn-secondary{background:#fff; border-color:var(--line); color:var(--text)}
    .btn:hover{transform:translateY(-2px); box-shadow:0 14px 28px rgba(31,42,55,.12)}
    .menu-btn{display:none}
    .hero{
      padding:28px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:22px; align-items:stretch;
    }
    .hero-main{
      position:relative; overflow:hidden;
      background:
        linear-gradient(135deg, rgba(106,92,255,.08), rgba(255,255,255,.92) 32%, rgba(37,194,160,.08)),
        #fff;
      border:1px solid rgba(228,232,241,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:34px;
      min-height:420px;
    }
    .hero-main::before,.hero-main::after{
      content:""; position:absolute; border-radius:50%; filter:blur(6px); opacity:.7; pointer-events:none;
    }
    .hero-main::before{width:180px;height:180px;background:rgba(106,92,255,.12); right:-40px; top:-30px}
    .hero-main::after{width:220px;height:220px;background:rgba(255,107,107,.10); left:-80px; bottom:-80px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 14px; border-radius:999px;
      background:rgba(106,92,255,.10); color:#4338ca; font-size:13px; font-weight:700;
      position:relative; z-index:1;
    }
    h1{margin:16px 0 12px; font-size:clamp(30px,4vw,52px); line-height:1.08; letter-spacing:-.03em}
    .hero p{margin:0; color:var(--muted); line-height:1.8; font-size:16px; max-width:60ch; position:relative; z-index:1}
    .hero-cta{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px; position:relative; z-index:1}
    .hero-pills{display:flex; flex-wrap:wrap; gap:10px; margin-top:22px; position:relative; z-index:1}
    .pill{padding:8px 12px; border-radius:999px; background:#f5f7ff; border:1px solid #e2e8ff; color:#3f3f74; font-size:13px}
    .hero-aside{
      display:grid; gap:16px;
    }
    .glass-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(228,232,241,.92);
      border-radius:24px;
      box-shadow:var(--shadow);
      padding:22px;
    }
    .glass-card h2,.section-title h2{margin:0 0 10px; font-size:26px; line-height:1.2}
    .glass-card p,.section-subtitle{margin:0; color:var(--muted); line-height:1.75}
    .metric-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .metric{
      background:linear-gradient(180deg,#fff, #f8faff);
      border:1px solid var(--line);
      border-radius:18px; padding:16px;
      min-height:106px;
    }
    .metric strong{display:block; font-size:28px; line-height:1; margin-bottom:10px}
    .metric span{color:var(--muted); font-size:13px; line-height:1.6}
    .section{padding:20px 0}
    .section-title{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:16px}
    .section-title small{color:#6b7280; font-weight:700; letter-spacing:.08em; text-transform:uppercase}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
      padding:22px;
      box-shadow:0 12px 30px rgba(31,42,55,.05);
      transition:.24s ease;
    }
    .card:hover{transform:translateY(-4px); box-shadow:0 18px 40px rgba(31,42,55,.10)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0; color:var(--muted); line-height:1.75}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:9px 12px; border-radius:999px; background:#f6f8ff; border:1px solid #e3e8ff; color:#394150; font-size:13px}
    .split{
      display:grid; grid-template-columns:1.03fr .97fr; gap:16px; align-items:start;
    }
    .list{
      display:grid; gap:12px;
    }
    .list-item{
      display:flex; gap:12px; align-items:flex-start;
      padding:14px 0; border-bottom:1px solid var(--line)
    }
    .list-item:last-child{border-bottom:none; padding-bottom:0}
    .dot{
      width:28px;height:28px;border-radius:10px; flex:none;
      display:grid;place-items:center; color:#fff; font-weight:800;
      background:linear-gradient(135deg,var(--brand1),var(--brand2));
    }
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{
      position:relative;
      padding:20px; background:linear-gradient(180deg,#fff, #f9fbff);
      border:1px solid var(--line); border-radius:20px;
    }
    .step strong{display:inline-flex; width:34px;height:34px; border-radius:12px; background:rgba(106,92,255,.12); color:#4f46e5; align-items:center; justify-content:center; margin-bottom:12px}
    .step h3{margin:0 0 8px}
    table{
      width:100%; border-collapse:separate; border-spacing:0; overflow:hidden;
      border:1px solid var(--line); border-radius:20px; background:#fff;
    }
    th,td{padding:14px 16px; text-align:left; vertical-align:top; border-bottom:1px solid var(--line)}
    th{background:#f7f9ff; font-size:14px}
    tr:last-child td{border-bottom:none}
    .table-wrap{overflow:auto; border-radius:20px}
    .compare{
      display:grid; grid-template-columns:.82fr 1.18fr; gap:16px;
    }
    .scorebox{
      background:linear-gradient(135deg, rgba(106,92,255,.08), rgba(255,107,107,.08), rgba(37,194,160,.08));
      border:1px solid #e6ebff;
      border-radius:24px;
      padding:24px;
    }
    .score{font-size:48px; font-weight:900; line-height:1; margin:8px 0}
    .stars{color:#f4b400; letter-spacing:2px; font-size:22px}
    .mini{color:var(--muted); line-height:1.8}
    .review{display:grid; gap:12px}
    .review-top{display:flex; align-items:center; justify-content:space-between; gap:12px}
    .avatar{
      width:44px; height:44px; border-radius:50%;
      display:grid; place-items:center; color:#fff; font-weight:800;
      background:linear-gradient(135deg,var(--brand1),var(--brand3));
      flex:none;
    }
    .review-head{display:flex; align-items:center; gap:12px}
    .review small{color:#6b7280}
    .faq details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px 18px;
      box-shadow:0 10px 24px rgba(31,42,55,.04);
    }
    .faq details + details{margin-top:12px}
    .faq summary{cursor:pointer; font-weight:700; list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:12px 0 0; color:var(--muted); line-height:1.75}
    .form{
      display:grid; gap:14px;
    }
    .field-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:block; font-weight:700; margin-bottom:8px; font-size:14px}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px;
      background:#fff; color:var(--text); outline:none; font:inherit;
      transition:border-color .2s, box-shadow .2s;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#9aa8ff; box-shadow:0 0 0 4px rgba(106,92,255,.10)}
    .footer{
      margin-top:22px;
      background:#f4f6fb;
      border-top:1px solid var(--line);
      color:var(--text);
    }
    .footer a{color:#243b76}
    .footer .container{padding:24px 0}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px; align-items:start}
    .fine{color:var(--muted); line-height:1.7; font-size:14px}
    .post-list{display:grid; gap:10px}
    .post-list a{
      padding:12px 14px; border-radius:14px; background:#fff; border:1px solid var(--line);
      display:flex; justify-content:space-between; gap:12px; color:#273449
    }
    .post-list a:hover{border-color:#c8d2ff}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:50; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:18px; display:grid; place-items:center;
      color:#fff; background:linear-gradient(135deg,var(--brand1),var(--brand2));
      box-shadow:0 14px 30px rgba(106,92,255,.24);
    }
    .float-panel{
      position:fixed; right:16px; bottom:78px; width:min(320px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:22px; box-shadow:var(--shadow);
      padding:16px; display:none;
    }
    .float-panel.open{display:block}
    .qrcode{display:flex; gap:14px; align-items:center}
    .qrcode img{width:92px; height:92px; object-fit:cover; border-radius:16px; border:1px solid var(--line)}
    .backtop{position:fixed; left:16px; bottom:16px; z-index:50}
    .scrolltop{
      width:52px;height:52px;border:none;border-radius:18px;background:#fff;border:1px solid var(--line);
      box-shadow:0 10px 26px rgba(31,42,55,.08); cursor:pointer;
    }
    .reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .reveal.show{opacity:1; transform:translateY(0)}
    .hero-images{display:grid; gap:12px; margin-top:16px}
    .hero-images img{display:none}
    .mobile-only{display:none}
    @media (max-width: 1080px){
      .hero-grid,.split,.compare,.footer-grid,.grid-4,.grid-3,.workflow{grid-template-columns:1fr 1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .field-grid,.grid-2{grid-template-columns:1fr}
      .hero-main{min-height:auto}
    }
    @media (max-width: 720px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .hero{padding-top:18px}
      .hero-grid,.split,.compare,.footer-grid,.grid-4,.grid-3,.workflow{grid-template-columns:1fr}
      .nav{padding:12px 0}
      .brand-text strong{font-size:16px}
      .hero-main{padding:22px; border-radius:22px}
      .glass-card,.card,.step,.scorebox{padding:18px}
      h1{font-size:30px}
      .section-title{flex-direction:column; align-items:flex-start}
      .nav-actions .btn-secondary{display:none}
      .mobile-only{display:inline-flex}
      .table-wrap{overflow-x:auto}
    }
    .mobile-nav{
      display:none;
      padding:0 0 14px;
    }
    .mobile-nav.open{display:block}
    .mobile-nav a{
      display:block; padding:12px 0; border-top:1px solid rgba(228,232,241,.75); color:#2f3a4f
    }