:root{
      --bg:#f4f8ff;
      --bg2:#fffaf4;
      --card:#ffffff;
      --card2:#f9fbff;
      --text:#12304a;
      --muted:#5c6f82;
      --line:#dce6f3;
      --primary:#2f6bff;
      --primary2:#5ad1ff;
      --accent:#ff8a5c;
      --accent2:#7a7cff;
      --shadow:0 16px 40px rgba(28, 61, 110, .10);
      --radius:20px;
      --radius-sm:14px;
      --max:1200px;
    }
    *{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;
      color:var(--text);
      background:
        radial-gradient(circle at 15% 10%, rgba(90,209,255,.18), transparent 22%),
        radial-gradient(circle at 85% 12%, rgba(255,138,92,.16), transparent 20%),
        linear-gradient(180deg, #f7fbff 0%, #f6f9ff 42%, #fffdf8 100%);
      line-height:1.7;
    }
    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:50;
      backdrop-filter:saturate(160%) blur(12px);
      background:rgba(247,251,255,.82);
      border-bottom:1px solid rgba(220,230,243,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      padding:12px 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 10px 24px rgba(47,107,255,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:1rem; letter-spacing:.5px}
    .brand-text span{display:block; color:var(--muted); font-size:.88rem}
    .nav-actions{display:flex; align-items:center; gap:10px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap}
    .nav-links a{color:#27415a; font-size:.95rem; padding:8px 10px; border-radius:10px}
    .nav-links a:hover{background:rgba(47,107,255,.08); color:var(--primary)}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:1px solid transparent; border-radius:999px; padding:12px 18px;
      font-weight:700; transition:.25s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff; box-shadow:0 12px 28px rgba(47,107,255,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 34px rgba(47,107,255,.28)}
    .btn-ghost{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-ghost:hover{border-color:#bed1ee; transform:translateY(-1px)}
    .menu-toggle{display:none; background:#fff; border:1px solid var(--line); border-radius:12px; padding:10px 12px}
    .hero{
      padding:42px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:22px; align-items:stretch;
    }
    .hero-card{
      background:
        linear-gradient(135deg, rgba(47,107,255,.12), rgba(90,209,255,.08) 45%, rgba(255,255,255,.96)),
        linear-gradient(180deg, #fff, #fff);
      border:1px solid rgba(191,210,235,.7);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:28px;
      position:relative;
      overflow:hidden;
    }
    .hero-card:before,.hero-card:after{
      content:""; position:absolute; border-radius:50%;
      filter:blur(2px); pointer-events:none;
    }
    .hero-card:before{width:220px;height:220px;background:rgba(90,209,255,.18);right:-70px;top:-40px}
    .hero-card:after{width:180px;height:180px;background:rgba(255,138,92,.14);left:-70px;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(47,107,255,.08);color:var(--primary);font-weight:700;font-size:.88rem}
    h1{margin:14px 0 12px; font-size:clamp(2rem, 4vw, 3.5rem); line-height:1.08}
    .hero p{margin:0; color:var(--muted); font-size:1.02rem; max-width:60ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 18px}
    .hero-points{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:12px; margin-top:18px}
    .mini{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(220,230,243,.9);
      border-radius:18px; padding:14px;
    }
    .mini strong{display:block; font-size:1.02rem}
    .mini span{color:var(--muted); font-size:.9rem}
    .side-stack{display:grid; gap:16px}
    .side-card{
      background:var(--card); border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); padding:20px;
    }
    .stat-grid{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:14px}
    .stat{
      padding:16px; border-radius:18px; background:linear-gradient(180deg, #fff, #f8fbff); border:1px solid var(--line);
    }
    .stat strong{display:block; font-size:1.35rem; color:var(--primary)}
    .stat span{color:var(--muted); font-size:.9rem}
    .section{padding:18px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:clamp(1.45rem, 2vw, 2.1rem)}
    .section-head p{margin:0; color:var(--muted); max-width:62ch}
    .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:var(--card); border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); padding:22px;
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .card:hover{transform:translateY(-3px); box-shadow:0 20px 44px rgba(28,61,110,.14); border-color:#c9d8ea}
    .card h3{margin:0 0 10px; font-size:1.08rem}
    .card p{margin:0; color:var(--muted)}
    .icon{
      width:46px; height:46px; border-radius:14px; display:grid; place-items:center; margin-bottom:14px;
      background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(255,138,92,.12));
      color:var(--primary); font-weight:900;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#29435c; font-size:.92rem}
    .workflow{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:14px}
    .step{
      position:relative; background:linear-gradient(180deg,#fff,#f7fbff); border:1px solid var(--line); border-radius:22px; padding:20px;
    }
    .step-num{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent2));color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}
    .compare{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow)}
    table{width:100%; border-collapse:collapse; min-width:820px; background:#fff}
    th,td{padding:16px 14px; text-align:left; border-bottom:1px solid #edf2f8; vertical-align:top}
    th{background:#f7fbff; color:#29435c; font-size:.95rem}
    td{color:#314b62}
    .badge{display:inline-flex; align-items:center; padding:6px 10px; border-radius:999px; background:rgba(47,107,255,.08); color:var(--primary); font-weight:700; font-size:.85rem}
    .scorebox{
      border:1px solid rgba(47,107,255,.16); background:linear-gradient(135deg, rgba(47,107,255,.08), rgba(255,138,92,.06), #fff); border-radius:24px; padding:22px;
    }
    .score{
      display:flex; align-items:center; gap:16px; flex-wrap:wrap;
    }
    .score strong{font-size:2.2rem; color:var(--primary)}
    .faq details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px 18px; box-shadow:var(--shadow)
    }
    .faq{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:14px}
    .faq summary{cursor:pointer; font-weight:700; list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:10px 0 0; color:var(--muted)}
    .reviews{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .review .name{font-weight:800}
    .review .role{color:var(--muted); font-size:.9rem; margin-bottom:10px}
    .articles{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
    .article-item{padding:18px; border-radius:20px; border:1px solid var(--line); background:linear-gradient(180deg,#fff,#f7fbff)}
    .article-item a{color:var(--text); font-weight:700}
    .article-item p{margin:8px 0 0; color:var(--muted); font-size:.95rem}
    .form-wrap{
      display:grid; grid-template-columns:1.05fr .95fr; gap:16px; align-items:start;
    }
    form{
      display:grid; gap:12px; background:#fff; border:1px solid var(--line); border-radius:24px; padding:22px; box-shadow:var(--shadow)
    }
    label{font-weight:700; font-size:.95rem}
    input,select,textarea{
      width:100%; border:1px solid #d8e4f0; background:#fbfdff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none; transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8bb1ff; box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    textarea{min-height:120px; resize:vertical}
    .contact-panel{
      display:grid; gap:14px;
    }
    .contact-item{padding:18px; border-radius:20px; border:1px solid var(--line); background:#fff}
    .contact-item strong{display:block; margin-bottom:6px}
    .footer{
      margin-top:10px; padding:24px 0 28px; background:#f2f7fd; border-top:1px solid var(--line); color:#29435c
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:16px}
    .footer a{color:#244f96}
    .footer small{color:#5b7187}
    .service-net{display:flex; flex-wrap:wrap; gap:10px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center; background:linear-gradient(135deg,var(--primary),var(--accent2)); color:#fff; box-shadow:0 14px 30px rgba(47,107,255,.28)
    }
    .toast-link{
      position:fixed; left:16px; bottom:16px; z-index:60; max-width:240px; background:#fff; border:1px solid var(--line); border-radius:18px; padding:14px; box-shadow:var(--shadow)
    }
    .toast-link a{color:var(--primary); font-weight:800}
    .mobile-only{display:none}
    .section-anchor{scroll-margin-top:92px}
    .table-note{margin-top:10px;color:var(--muted);font-size:.92rem}
    .img-card{display:grid; gap:12px}
    .img-card .ai-page-image{width:100%; border-radius:18px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow)}
    .split-list{display:grid; gap:10px}
    .split-list div{display:flex; gap:10px; align-items:flex-start; color:var(--muted)}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));margin-top:.5em;flex:none}
    .spacer{height:4px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.workflow,.reviews,.articles,.form-wrap,.footer-grid{grid-template-columns:1fr}
      .faq{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-only{display:block}
    }
    .mobile-nav{
      display:none; padding:0 0 14px;
    }
    .mobile-nav.open{display:block}
    .mobile-nav .nav-links{
      display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:8px;
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:12px;
    }
    .mobile-nav .nav-links a{background:#f8fbff}
    .reveal{opacity:0; transform:translateY(16px); transition:.55s ease}
    .reveal.visible{opacity:1; transform:none}