:root{
      --bg:#f5f7fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --card2:#f8fbff;
      --text:#17304d;
      --muted:#5b6b80;
      --line:#dbe5f2;
      --brand:#2d6bff;
      --brand2:#00c2ff;
      --accent:#7b61ff;
      --good:#14b86a;
      --warn:#ffb020;
      --shadow:0 18px 45px rgba(25,49,90,.10);
      --radius:22px;
      --radius-sm:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 10%, rgba(45,107,255,.10), transparent 25%),
        radial-gradient(circle at 90% 15%, rgba(0,194,255,.10), transparent 22%),
        linear-gradient(180deg, #f9fbff 0%, #f4f7fd 45%, #f7f9ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--max));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(18px);
      background:rgba(245,248,255,.82);
      border-bottom:1px solid rgba(219,229,242,.7);
    }
    .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 img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 18px rgba(45,107,255,.10)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem;letter-spacing:.5px}
    .brand-text span{display:block;font-size:.82rem;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.94rem;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s ease}
    .nav-links a:hover,.nav-links a:focus{color:var(--text);background:rgba(45,107,255,.10)}
    .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:12px 18px;font-weight:700;transition:.25s ease;cursor:pointer;
      box-shadow:none;
    }
    .btn-primary{
      color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2));
      box-shadow:0 12px 25px rgba(45,107,255,.22);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(45,107,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#b9cae2;box-shadow:0 10px 24px rgba(25,49,90,.08)}
    .menu-toggle{display:none}
    .hero{
      padding:48px 0 20px;
      position:relative;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:"";position:absolute;inset:auto;border-radius:50%;
      pointer-events:none;filter:blur(10px);
    }
    .hero::before{width:320px;height:320px;left:-120px;top:30px;background:radial-gradient(circle, rgba(0,194,255,.20), transparent 62%)}
    .hero::after{width:360px;height:360px;right:-140px;top:10px;background:radial-gradient(circle, rgba(123,97,255,.18), transparent 62%)}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;position:relative;z-index:1}
    .hero-copy,.hero-panel,.card,.section-box,.faq-item,.review,.article-item,.compare-table,.form-card,.timeline-item{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(219,229,242,.85);
      box-shadow:var(--shadow);
      backdrop-filter:blur(10px);
    }
    .hero-copy{
      border-radius:32px;padding:30px;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 14px;border-radius:999px;background:rgba(45,107,255,.10);color:var(--brand);
      font-weight:700;font-size:.9rem;
    }
    h1{font-size:clamp(2rem,4vw,3.55rem);line-height:1.08;margin:18px 0 14px;letter-spacing:-.03em}
    .lead{font-size:1.05rem;line-height:1.8;color:var(--muted);margin:0 0 22px;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{
      padding:14px 15px;border-radius:18px;background:linear-gradient(180deg,#fff,#f6f9ff);
      border:1px solid var(--line)
    }
    .mini-stat b{display:block;font-size:1.05rem;margin-bottom:4px}
    .mini-stat span{font-size:.88rem;color:var(--muted);line-height:1.5}
    .hero-panel{
      border-radius:32px;padding:22px;display:flex;flex-direction:column;gap:14px;
      background:
        linear-gradient(180deg, rgba(255,255,255,.94), rgba(245,249,255,.88)),
        radial-gradient(circle at 20% 20%, rgba(0,194,255,.10), transparent 28%),
        radial-gradient(circle at 80% 0%, rgba(123,97,255,.10), transparent 24%);
    }
    .panel-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .panel-chip{padding:8px 12px;border-radius:999px;background:#edf5ff;color:var(--brand);font-weight:700;font-size:.86rem}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat-card,.card,.review,.article-item,.faq-item,.timeline-item,.form-card,.compare-table{border-radius:var(--radius)}
    .stat-card{padding:16px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .stat-card .num{font-size:1.45rem;font-weight:800;color:var(--text)}
    .stat-card .txt{font-size:.9rem;color:var(--muted);line-height:1.5;margin-top:6px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:clamp(1.45rem,2vw,2.15rem)}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:70ch}
    .section-box{border-radius:28px;padding:22px}
    .cards-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .cards-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .cards-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .card{padding:18px;transition:.25s ease}
    .card:hover,.review:hover,.article-item:hover,.faq-item:hover,.timeline-item:hover{transform:translateY(-3px)}
    .card h3,.review h3,.article-item h3,.timeline-item h3{margin:0 0 8px;font-size:1.05rem}
    .card p,.review p,.article-item p,.timeline-item p,.section-box li{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(45,107,255,.12),rgba(0,194,255,.12));
      color:var(--brand);font-weight:800;margin-bottom:12px
    }
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#f0f5ff;border:1px solid #dce8ff;color:#3155a5;font-size:.88rem}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .timeline-item{padding:18px;border:1px solid var(--line);background:#fff}
    .timeline-item .step{font-weight:800;color:var(--brand);margin-bottom:8px}
    .table-wrap{overflow-x:auto;border-radius:24px}
    table{width:100%;border-collapse:collapse;min-width:820px;background:#fff}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f8ff;color:var(--text);font-size:.95rem}
    td{color:var(--muted);line-height:1.7}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .stars{color:#ffb020;font-size:1.15rem;letter-spacing:2px}
    .pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .price-card{padding:20px;border-radius:24px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .price-card strong{font-size:1.6rem;display:block;margin:6px 0;color:var(--text)}
    .price-card small{color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;border:none;background:transparent;color:var(--text);
      padding:18px 20px;font-size:1rem;font-weight:700;text-align:left;cursor:pointer;
      display:flex;justify-content:space-between;align-items:center;gap:16px
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
    .faq-a > div{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:220px}
    .faq-item.open .faq-q span{transform:rotate(45deg)}
    .faq-q span{font-size:1.4rem;color:var(--brand);transition:.25s ease}
    .review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .review{padding:18px}
    .review .role{font-size:.88rem;color:var(--brand);font-weight:700;margin-bottom:8px}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article-item{padding:18px}
    .article-meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:.88rem;margin-bottom:10px}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .form-card{padding:22px}
    .form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}
    .field label{font-weight:700;font-size:.94rem}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;
      background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#9bc0ff;box-shadow:0 0 0 4px rgba(45,107,255,.10)}
    textarea{min-height:120px;resize:vertical}
    .contact-box{
      padding:22px;border-radius:28px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--line)
    }
    .contact-line{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}
    .contact-line:last-child{border-bottom:none}
    .qrcode{width:118px;height:118px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff;padding:8px}
    .qrcode img{width:100%;height:100%;object-fit:cover}
    .footer{
      margin-top:18px;padding:24px 0 34px;border-top:1px solid rgba(219,229,242,.9);
      background:linear-gradient(180deg,rgba(245,248,255,.92),rgba(238,243,255,.96));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:start}
    .footer small,.footer p,.footer a{color:var(--muted)}
    .footer a:hover{color:var(--brand)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .float-bar{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;
      box-shadow:0 12px 24px rgba(45,107,255,.26);border:none;cursor:pointer
    }
    .backtop{opacity:0;pointer-events:none;transform:translateY(8px);transition:.25s ease}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .mobile-only{display:none}
    .muted{color:var(--muted)}
    .inline-links a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
    .gallery{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
    }
    .gallery .img-card{border-radius:24px;overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    .gallery .img-card img{width:100%;height:auto;display:block}
    @media (max-width: 980px){
      .hero-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
      .cards-4,.cards-3,.cards-2,.review-grid,.article-list,.timeline,.pricing{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:74px;flex-direction:column;
        background:rgba(255,255,255,.98);padding:12px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav.open .nav-cta{display:flex;position:absolute;right:16px;top:18px}
      .nav{position:relative;padding-right:52px}
    }
    @media (max-width: 720px){
      .cards-4,.cards-3,.cards-2,.review-grid,.article-list,.timeline,.pricing,.grid-2,.form-row,.gallery{grid-template-columns:1fr}
      .hero-copy,.hero-panel,.section-box,.form-card,.contact-box{padding:18px;border-radius:24px}
      h1{font-size:2rem}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}