:root{
      --bg:#f6f9ff;
      --bg2:#ffffff;
      --card:#ffffff;
      --text:#10233d;
      --muted:#5b6b84;
      --line:#dce7f7;
      --brand:#1064ff;
      --brand2:#15c3ff;
      --accent:#ffb703;
      --soft:#edf5ff;
      --shadow:0 18px 50px rgba(16, 35, 61, .08);
      --radius:20px;
      --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",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(21,195,255,.16), transparent 24%),
        radial-gradient(circle at 88% 14%, rgba(16,100,255,.13), transparent 22%),
        linear-gradient(180deg,#f8fbff 0%, #f3f7fd 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(246,249,255,.84);
      border-bottom:1px solid rgba(220,231,247,.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:44px; height:44px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 24px rgba(16,35,61,.08)}
    .brand .name{font-size:18px; font-weight:800; letter-spacing:.5px}
    .brand .sub{font-size:12px; color:var(--muted); margin-top:3px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap}
    .nav-links a{font-size:14px; color:#314560; padding:8px 10px; border-radius:999px}
    .nav-links a:hover{background:rgba(16,100,255,.08); color:var(--brand)}
    .nav-actions{display:flex; align-items:center; gap:10px}
    .btn, .btn-ghost{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border-radius:999px; padding:12px 18px; font-weight:700; transition:.25s ease;
      border:1px solid transparent; cursor:pointer;
    }
    .btn{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; box-shadow:0 12px 30px rgba(16,100,255,.22)}
    .btn:hover{transform:translateY(-2px); box-shadow:0 18px 36px rgba(16,100,255,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:#bcd3f7; transform:translateY(-1px)}
    .menu-toggle{display:none; background:#fff; border:1px solid var(--line); border-radius:12px; padding:10px 12px; cursor:pointer}
    .hero{
      padding:54px 0 26px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:stretch;
    }
    .hero-main, .hero-side, .card, .panel, .faq-item, .review, .article, .pricing, .contact-box{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(220,231,247,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:8px 14px; border-radius:999px;
      background:linear-gradient(135deg, rgba(16,100,255,.12), rgba(21,195,255,.12)); color:#0b4ac5; font-weight:700; font-size:13px;
    }
    h1{font-size:clamp(32px, 5vw, 56px); line-height:1.08; margin:18px 0 14px; letter-spacing:-.03em}
    .lead{font-size:17px; line-height:1.8; color:var(--muted); max-width:56ch; margin:0}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-highlights{display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:26px}
    .mini{
      padding:16px; border-radius:16px; background:linear-gradient(180deg,#f8fbff,#eef6ff); border:1px solid #dfeafb
    }
    .mini b{display:block; font-size:18px; margin-bottom:6px}
    .mini span{font-size:13px; color:var(--muted); line-height:1.6}
    .hero-side{padding:22px; display:grid; gap:14px}
    .side-stat{padding:18px; border-radius:16px; background:linear-gradient(180deg,#fff,#f5f9ff); border:1px solid var(--line)}
    .side-stat .num{font-size:28px; font-weight:900; color:var(--brand)}
    .side-stat p{margin:6px 0 0; color:var(--muted); line-height:1.6}
    .section{padding:22px 0 4px}
    .section h2{font-size:clamp(24px, 3vw, 34px); margin:0 0 10px}
    .section .desc{margin:0 0 20px; color:var(--muted); line-height:1.75}
    .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{padding:20px}
    .card h3{margin:10px 0 8px; font-size:18px}
    .card p{margin:0; color:var(--muted); line-height:1.7}
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(16,100,255,.14), rgba(21,195,255,.14)); color:#0b4ac5; font-weight:900;
    }
    .metrics .card{background:linear-gradient(180deg,#fff,#f7fbff)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 14px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#284161; font-size:13px}
    .timeline{display:grid; gap:14px}
    .step{display:grid; grid-template-columns:56px 1fr; gap:14px; align-items:start; padding:18px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .step .n{width:56px; height:56px; border-radius:18px; display:grid; place-items:center; background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; font-weight:900}
    .step h3{margin:0 0 6px}
    .table-wrap{overflow-x:auto; background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow)}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:16px 14px; border-bottom:1px solid #edf2fb; text-align:left; vertical-align:top}
    th{background:#f7fbff; font-size:14px}
    .rating{display:flex; gap:4px; color:#ffb703}
    .panel{padding:20px}
    details{border-top:1px solid #edf2fb; padding:16px 0}
    details:first-child{border-top:none}
    summary{cursor:pointer; list-style:none; font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{color:var(--muted); line-height:1.75; margin:10px 0 0}
    .reviews .review{padding:20px}
    .review .who{display:flex; justify-content:space-between; gap:10px; margin-bottom:10px; font-weight:700}
    .review .role{color:var(--brand); font-size:13px}
    .review p{margin:0; color:var(--muted); line-height:1.75}
    .article-list{display:grid; gap:12px}
    .article{padding:18px 20px; display:flex; justify-content:space-between; gap:14px; align-items:center}
    .article small{color:var(--muted); display:block; margin-top:4px}
    .contact-box{padding:22px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:grid; gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px; font:inherit; color:var(--text); background:#fff; outline:none;
    }
    textarea{min-height:130px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#98befc; box-shadow:0 0 0 4px rgba(16,100,255,.08)}
    .footer{
      margin-top:22px; padding:26px 0 30px; border-top:1px solid rgba(220,231,247,.92); background:rgba(247,250,255,.9)
    }
    .footer-grid{display:grid; grid-template-columns:1.25fr .75fr; gap:18px}
    .footer a{color:#184dba}
    .float-tools{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-tools a, .float-tools button{
      width:48px; height:48px; border-radius:16px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow);
      display:grid; place-items:center; cursor:pointer; color:var(--brand); font-weight:800;
    }
    .floating-card{
      position:fixed; right:16px; bottom:76px; z-index:59; width:min(280px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); padding:16px; display:none;
    }
    .floating-card.open{display:block}
    .floating-card .qr{display:flex; gap:12px; align-items:center}
    .floating-card img{width:82px; height:82px; object-fit:cover; border-radius:14px; border:1px solid var(--line)}
    .muted{color:var(--muted)}
    .divider{height:1px; background:linear-gradient(90deg, transparent, #dfe8f8 20%, #dfe8f8 80%, transparent); margin:18px 0}
    .image-row{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .image-row img, .thumb img{border-radius:18px; border:1px solid var(--line); background:#fff}
    .thumb{display:grid; gap:12px}
    .anchor-top{display:flex; align-items:center; gap:10px; flex-wrap:wrap}
    .sticky-note{padding:14px 16px; border-radius:16px; background:linear-gradient(135deg, rgba(255,183,3,.12), rgba(16,100,255,.08)); border:1px solid rgba(255,183,3,.18); color:#6d4b00}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.footer-grid{grid-template-columns:1fr 1fr}
      .hero-highlights{grid-template-columns:1fr}
    }
    @media (max-width: 768px){
      .nav-links{display:none}
      .nav-links.open{display:flex; position:absolute; left:16px; right:16px; top:68px; flex-direction:column; background:#fff; border:1px solid var(--line); border-radius:18px; padding:12px; box-shadow:var(--shadow)}
      .menu-toggle{display:inline-flex}
      .hero{padding-top:28px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.footer-grid,.form-grid,.image-row{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .article{flex-direction:column; align-items:flex-start}
    }
    @keyframes riseIn{from{opacity:0; transform:translateY(14px)} to{opacity:1; transform:translateY(0)}}
    .reveal{animation:riseIn .7s ease both}
    .reveal:nth-child(2){animation-delay:.08s}
    .reveal:nth-child(3){animation-delay:.16s}
    .reveal:nth-child(4){animation-delay:.24s}
    .reveal:nth-child(5){animation-delay:.32s}