:root{
      --bg:#f6f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#1f2a37;
      --muted:#617084;
      --line:#dbe5f3;
      --brand:#1b66ff;
      --brand2:#00b8d9;
      --accent:#ffb000;
      --shadow:0 18px 50px rgba(31,42,55,.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(1200px 500px at 15% 0%, rgba(27,102,255,.10), transparent 55%),
        radial-gradient(900px 420px at 85% 8%, rgba(0,184,217,.10), transparent 50%),
        linear-gradient(180deg, var(--bg) 0%, #fbfcff 100%);
      line-height:1.65;
    }
    a{color:var(--brand);text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{
      position:sticky;top:0;z-index:80;
      backdrop-filter:blur(18px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,229,243,.7);
    }
    .topbar{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;padding:12px 0;
    }
    .brand{display:flex;align-items:center;gap:14px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(27,102,255,.12)}
    .brand strong{display:block;font-size:1.06rem;letter-spacing:.4px}
    .brand span{display:block;font-size:.88rem;color:var(--muted)}
    nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
    .nav-links a,.nav-cta a,.btn,.btn-ghost,.tag,.pill{
      border-radius:999px;
      padding:10px 14px;
      transition:.25s ease;
      border:1px solid transparent;
      font-size:.95rem;
      white-space:nowrap;
    }
    .nav-links a{color:#2b3a4d}
    .nav-links a:hover,.nav-links a:focus{background:#fff;border-color:var(--line);box-shadow:0 10px 24px rgba(31,42,55,.08)}
    .nav-cta a,.btn{
      background:linear-gradient(135deg,var(--brand),#3f7cff);
      color:#fff;
      box-shadow:0 14px 24px rgba(27,102,255,.18);
    }
    .nav-cta a:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 18px 30px rgba(27,102,255,.22)}
    .nav-toggle{
      display:none;border:none;background:#fff;border:1px solid var(--line);color:var(--text);
      padding:10px 12px;border-radius:14px;box-shadow:0 8px 20px rgba(31,42,55,.06)
    }
    main{display:block}
    section{padding:34px 0}
    .hero{padding:30px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch
    }
    .hero-card,.panel,.card,.review,.faq-item,.article-card,.compare-card,.quote-card,.form-card,.timeline-card{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(219,229,243,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{padding:34px;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;right:-70px;top:-80px;background:radial-gradient(circle, rgba(0,184,217,.20), transparent 65%)}
    .hero-card:after{width:280px;height:280px;right:6%;bottom:-150px;background:radial-gradient(circle, rgba(27,102,255,.12), transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eaf2ff;color:#1c54d4;border:1px solid #d5e3ff;padding:7px 12px;border-radius:999px;font-size:.88rem;font-weight:600}
    h1{font-size:clamp(2rem,4vw,3.65rem);line-height:1.05;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{color:var(--muted);font-size:1.03rem;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn-ghost{
      background:#fff;color:#1f2a37;border:1px solid var(--line);
    }
    .btn-ghost:hover,.nav-links a:hover,.tag:hover{transform:translateY(-1px)}
    .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .pill,.tag{
      background:#f4f8ff;border:1px solid #dce8ff;color:#24406b;font-weight:600
    }
    .hero-side{display:grid;gap:14px}
    .hero-side .mini{
      padding:22px;border-radius:22px;background:linear-gradient(180deg,#fff, #f7fbff);
      border:1px solid var(--line);box-shadow:var(--shadow)
    }
    .stats{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px
    }
    .stat{
      padding:22px 18px;position:relative;overflow:hidden
    }
    .stat b{display:block;font-size:1.55rem;margin-bottom:6px}
    .stat span{color:var(--muted);font-size:.92rem}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:18px}
    .section-head h2{margin:0;font-size:clamp(1.45rem,2.3vw,2.2rem)}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .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,.review,.article-card,.compare-card,.faq-item,.form-card,.timeline-card{padding:22px}
    .card h3,.review h3,.article-card h3,.compare-card h3,.timeline-card h3{margin:0 0 10px;font-size:1.08rem}
    .card p,.review p,.article-card p,.compare-card p,.timeline-card p{margin:0;color:var(--muted)}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(27,102,255,.12), rgba(0,184,217,.14));
      color:#1346bd;font-weight:800;margin-bottom:14px
    }
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      padding:22px;background:#fff;border:1px solid var(--line);border-radius:22px;position:relative
    }
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:999px;align-items:center;justify-content:center;background:#eaf2ff;color:#1d5fe5;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:24px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:16px 14px;border-bottom:1px solid #edf2f9;text-align:left;vertical-align:top}
    th{background:#f6f9ff;font-size:.95rem}
    td{color:#334155}
    .rating{color:#d97706;font-weight:700}
    .check{color:#0f9d58;font-weight:700}
    .x{color:#d14343;font-weight:700}
    .quote{font-size:1.08rem;color:#20304a}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-card .k{font-size:.88rem;color:#1c54d4;font-weight:700}
    .showcase{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
    .showcase .big{grid-column:span 7}
    .showcase .small{grid-column:span 5;display:grid;gap:16px}
    .image-card{
      overflow:hidden;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)
    }
    .image-card img{width:100%;height:auto}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card time{color:#7b8797;font-size:.9rem}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-btn{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
      background:transparent;border:none;padding:20px 22px;font-size:1rem;color:var(--text);text-align:left
    }
    .faq-btn span{font-weight:700}
    .faq-panel{max-height:0;overflow:hidden;transition:max-height .3s ease}
    .faq-panel div{padding:0 22px 20px;color:var(--muted)}
    .faq-item.active .faq-panel{max-height:240px}
    .faq-item.active .chev{transform:rotate(180deg)}
    .chev{transition:transform .25s ease}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:block;font-size:.95rem;font-weight:700;margin-bottom:8px}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid #d8e2f0;
      background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#7fb0ff;box-shadow:0 0 0 4px rgba(27,102,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer-top{
      display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start
    }
    footer{
      margin-top:10px;padding:28px 0 24px;border-top:1px solid var(--line);
      background:linear-gradient(180deg,#f2f6fd,#edf2fb);color:#233044
    }
    footer a{color:#1d57d2}
    .footer-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:18px;color:#56657a;font-size:.92rem}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:90;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:50px;height:50px;border-radius:16px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),#3f7cff);color:#fff;box-shadow:0 14px 26px rgba(27,102,255,.22)
    }
    .floating button{cursor:pointer}
    .floating a:hover,.floating button:hover{transform:translateY(-2px)}
    .mobile-only{display:none}
    .service-net{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .service-net .card{min-height:100%}
    .split-note{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .table-note{margin-top:12px;color:var(--muted);font-size:.92rem}
    .kpi-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .mini-list{display:grid;gap:10px;padding-left:0;list-style:none;margin:0}
    .mini-list li{display:flex;gap:10px;align-items:flex-start;color:#304155}
    .mini-list li:before{content:"•";color:var(--brand);font-weight:900;line-height:1.2}
    .center{text-align:center}
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease}
    .reveal.show{opacity:1;transform:none}
    .avatar-row{display:flex;align-items:center;gap:10px;margin-top:14px}
    .avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#dfeaff,#eef8ff);display:grid;place-items:center;font-weight:800;color:#2050c5}
    .rating-line{display:flex;align-items:center;gap:10px;margin:10px 0 4px}
    .stars{color:#f59e0b;letter-spacing:2px}
    .brand-links{display:flex;flex-wrap:wrap;gap:10px}
    .brand-links a{padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#28405f}
    .brand-links a:hover{border-color:#b9cdf7;box-shadow:0 10px 22px rgba(31,42,55,.08)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.process,.timeline,.articles,.service-net,.footer-top,.showcase{grid-template-columns:1fr}
      .showcase .big,.showcase .small{grid-column:auto}
      .stats{grid-template-columns:repeat(2,1fr)}
      .topbar{position:relative}
      nav{display:none;position:absolute;left:0;right:0;top:100%;background:rgba(246,248,252,.98);padding:14px 16px;border-bottom:1px solid var(--line);box-shadow:0 14px 28px rgba(31,42,55,.08)}
      nav.open{display:block}
      .nav-links{display:grid;grid-template-columns:repeat(2,1fr);width:100%}
      .nav-links a,.nav-cta a{width:100%;text-align:center}
      .nav-toggle{display:inline-grid;place-items:center}
      .desktop-home{display:none}
      .mobile-only{display:block}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      section{padding:24px 0}
      .hero-card{padding:24px}
      .stats{grid-template-columns:1fr}
      .nav-links{grid-template-columns:1fr}
      h1{font-size:2rem}
      .hero-actions{display:grid;grid-template-columns:1fr}
      .floating{right:12px;bottom:12px}
    }