:root{
      --bg:#f6f8fc;
      --bg-2:#eef4ff;
      --card:#ffffff;
      --card-2:#f9fbff;
      --text:#172033;
      --muted:#5f6b82;
      --line:#dbe4f3;
      --brand:#4b63ff;
      --brand-2:#00c2ff;
      --brand-3:#9b5cff;
      --success:#15b79e;
      --shadow:0 18px 48px rgba(28,45,99,.10);
      --shadow-soft:0 10px 30px rgba(28,45,99,.08);
      --radius:20px;
      --radius-sm:14px;
      --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(75,99,255,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(0,194,255,.12), transparent 24%),
        linear-gradient(180deg, #fdfefe 0%, var(--bg) 35%, #f3f7ff 100%);
      min-height:100vh;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,228,243,.8);
    }
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain}
    .brand-text{display:flex;flex-direction:column;line-height:1.15}
    .brand-text strong{font-size:18px;letter-spacing:.4px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .nav-menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav-menu a{font-size:14px;color:#33415c;padding:8px 0;position:relative}
    .nav-menu a::after{
      content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:999px;
      background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:.25s ease;
    }
    .nav-menu a:hover::after,.nav-menu a:focus-visible::after{width:100%}
    .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;font-size:14px;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      cursor:pointer;white-space:nowrap;
    }
    .btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-soft)}
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-3));
      box-shadow:0 12px 30px rgba(75,99,255,.24);
    }
    .btn-ghost{background:#fff;border-color:var(--line);color:#24314f}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:#22314e;
    }

    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card{
      background:linear-gradient(180deg, rgba(255,255,255,.94), rgba(248,250,255,.98));
      border:1px solid rgba(219,228,243,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:50%;filter:blur(12px);pointer-events:none;
    }
    .hero-main::before{width:260px;height:260px;right:-80px;top:-90px;background:radial-gradient(circle, rgba(0,194,255,.22), transparent 62%)}
    .hero-main::after{width:220px;height:220px;right:80px;bottom:-110px;background:radial-gradient(circle, rgba(155,92,255,.20), transparent 62%)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:rgba(75,99,255,.08);color:#3550d6;font-weight:700;font-size:13px;
      border:1px solid rgba(75,99,255,.14);
    }
    h1{margin:18px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .meta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
    .chip{
      display:inline-flex;align-items:center;gap:8px;
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#31415f;font-size:13px;box-shadow:0 6px 18px rgba(22,34,58,.05)
    }
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:16px}
    .mini-panel{
      background:linear-gradient(135deg, rgba(75,99,255,.10), rgba(0,194,255,.08));
      border:1px solid rgba(75,99,255,.14);
      border-radius:18px;padding:18px;
    }
    .mini-panel h3{margin:0 0 8px;font-size:18px}
    .mini-panel ul{margin:0;padding-left:18px;color:#40506d;line-height:1.8;font-size:14px}
    .stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
    .stat-card{
      background:rgba(255,255,255,.9);border:1px solid var(--line);
      border-radius:18px;padding:16px;box-shadow:0 10px 28px rgba(26,42,80,.06)
    }
    .stat-card strong{display:block;font-size:26px;line-height:1;color:#172033}
    .stat-card span{display:block;margin-top:8px;font-size:13px;color:var(--muted);line-height:1.5}

    main{padding:12px 0 34px}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(22px,3vw,32px)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7;font-size:14px}
    .section-card{padding:22px}
    .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:linear-gradient(180deg,#fff,#fbfcff);
      border:1px solid var(--line);
      border-radius:18px;padding:18px;box-shadow:0 10px 22px rgba(27,41,78,.05);
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
      height:100%;
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow-soft);border-color:#c9d6f0}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#31415f}
    .icon-box{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(75,99,255,.14), rgba(0,194,255,.12));
      color:#2d46cf;margin-bottom:12px;font-size:20px
    }
    .timeline{display:grid;gap:14px}
    .timeline-item{
      display:grid;grid-template-columns:92px 1fr;gap:16px;align-items:flex-start;
      padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff;
    }
    .timeline-item b{color:#31415f}
    .timeline-item span{color:var(--muted);font-size:14px;line-height:1.7}
    .comparison-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:#fff}
    .comparison-wrap{overflow-x:auto}
    .comparison-table th,.comparison-table td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top;font-size:14px}
    .comparison-table th{background:#f4f7ff;text-align:left;color:#263451}
    .comparison-table tr:last-child td{border-bottom:none}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
    .badge.good{background:rgba(21,183,158,.10);color:#0f8e76}
    .badge.high{background:rgba(75,99,255,.10);color:#3550d6}
    .badge.warm{background:rgba(255,160,67,.12);color:#b56400}
    .accordion{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden;
    }
    .faq-q{
      width:100%;text-align:left;border:0;background:transparent;padding:16px 18px;
      display:flex;align-items:center;justify-content:space-between;gap:12px;
      font-size:15px;font-weight:700;color:#22314e;cursor:pointer;
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;color:var(--muted);padding:0 18px}
    .faq-item.open .faq-a{padding:0 18px 16px;max-height:180px}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:transform .25s ease}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#fafcff);border:1px solid var(--line);
    }
    .review-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
    .stars{color:#f2b01e;letter-spacing:1px}
    .review p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .review strong{display:block;margin-top:12px;font-size:14px;color:#22314e}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-list{display:grid;gap:12px}
    .article{
      display:flex;justify-content:space-between;gap:16px;align-items:flex-start;
      padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff;
    }
    .article b{display:block;margin-bottom:6px}
    .article span{color:var(--muted);font-size:13px;line-height:1.6}
    .article a{color:#3550d6;font-weight:700;font-size:13px;white-space:nowrap}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#22314e}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8aa3ff;box-shadow:0 0 0 4px rgba(75,99,255,.10)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1 / -1}
    .footer{
      margin-top:10px;padding:22px 0 24px;
      background:#edf3ff;border-top:1px solid var(--line);color:#24314f
    }
    .footer a{color:#2746cf}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px;align-items:flex-start}
    .footer small{color:#5e6d88;line-height:1.8}
    .fixed-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px;
    }
    .tool{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:#fff;
      border:1px solid var(--line);box-shadow:var(--shadow-soft);cursor:pointer;color:#24314f
    }
    .floating-contact{
      position:fixed;left:16px;bottom:16px;z-index:60;
      background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;
      padding:14px;max-width:260px;
    }
    .floating-contact h4{margin:0 0 10px;font-size:15px}
    .floating-contact p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .floating-contact .mini-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
    .mini-links a{font-size:12px;padding:7px 10px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);color:#294070}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease, transform .55s ease}
    .scroll-reveal.visible{opacity:1;transform:translateY(0)}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-3,.review-grid,.articles,.footer-grid{grid-template-columns:1fr 1fr}
      .stat-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 768px){
      .nav-menu{display:none}
      .nav-menu.open{
        display:grid;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:14px;gap:8px;box-shadow:var(--shadow);
      }
      .menu-toggle{display:inline-flex}
      .hero{padding-top:22px}
      .hero-grid,.grid-2,.grid-3,.review-grid,.articles,.footer-grid,.form-grid,.timeline-item{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .stat-grid{grid-template-columns:1fr 1fr}
      .hero-main{padding:22px}
      .hero-actions,.nav-actions{flex-wrap:wrap}
      .floating-contact{max-width:unset;left:12px;right:12px;bottom:78px}
      .fixed-tools{right:12px;bottom:12px}
      .mobile-only{display:inline-flex}
    }