:root{
      --bg:#f5f8ff;
      --bg2:#edf3ff;
      --card:#ffffff;
      --text:#132033;
      --muted:#52637b;
      --line:#dbe4f3;
      --blue:#165dff;
      --blue2:#0f3fb8;
      --accent:#2f8cff;
      --gold:#ffb020;
      --green:#1aa67a;
      --shadow:0 18px 50px rgba(18,46,102,.10);
      --shadow2:0 10px 28px rgba(18,46,102,.08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(22,93,255,.10), transparent 32%),
        radial-gradient(circle at 85% 10%, rgba(47,140,255,.12), transparent 26%),
        linear-gradient(180deg, #f9fbff 0%, #eef4ff 100%);
      min-height:100vh;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header, main, footer{position:relative; z-index:1}
    .topbar{
      position:sticky; top:0; backdrop-filter:saturate(160%) blur(12px);
      background:rgba(245,248,255,.86); border-bottom:1px solid rgba(219,228,243,.9);
      z-index:50;
    }
    .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}
    .brand strong{display:block; font-size:16px; letter-spacing:.4px}
    .brand span{display:block; font-size:12px; color:var(--muted); margin-top:2px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:#27405f; padding:8px 10px; border-radius:10px; transition:.2s}
    .nav-links a:hover{background:#eaf1ff; color:var(--blue)}
    .nav-cta{display:flex; gap:10px; align-items:center}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:1px solid transparent; border-radius:999px; padding:11px 16px;
      font-weight:700; font-size:14px; cursor:pointer; transition:.22s ease;
      box-shadow:none;
    }
    .btn-primary{background:linear-gradient(135deg, var(--blue), #36a3ff); color:#fff; box-shadow:0 12px 26px rgba(22,93,255,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 30px rgba(22,93,255,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:#b9c9e6; transform:translateY(-2px)}
    .menu-btn{display:none; width:44px; height:44px; border-radius:14px; border:1px solid var(--line); background:#fff; align-items:center; justify-content:center}
    .menu-btn span,.menu-btn span::before,.menu-btn span::after{content:""; display:block; width:18px; height:2px; background:#28415f; border-radius:2px; position:relative}
    .menu-btn span::before{position:absolute; top:-6px}
    .menu-btn span::after{position:absolute; top:6px}
    .hero{
      padding:44px 0 24px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.3fr .9fr; gap:22px; align-items:stretch;
    }
    .hero-main{
      position:relative; overflow:hidden; background:
        linear-gradient(135deg, rgba(22,93,255,.98), rgba(20,61,168,.96));
      color:#fff; border-radius:28px; padding:34px;
      box-shadow:0 26px 60px rgba(16,48,120,.22);
    }
    .hero-main::before,.hero-main::after{
      content:""; position:absolute; border-radius:50%; background:rgba(255,255,255,.12); filter:blur(2px);
    }
    .hero-main::before{width:210px; height:210px; right:-70px; top:-60px}
    .hero-main::after{width:180px; height:180px; right:40px; bottom:-80px}
    .badge-row{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:18px}
    .badge{
      display:inline-flex; align-items:center; gap:8px; font-size:13px; color:#eaf1ff;
      background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.18);
      padding:8px 12px; border-radius:999px;
    }
    h1{font-size:clamp(30px, 4vw, 52px); line-height:1.08; margin:0 0 16px}
    .hero p{margin:0; max-width:58ch; color:rgba(255,255,255,.9); line-height:1.8; font-size:16px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-actions .btn-primary{background:#fff; color:var(--blue2)}
    .hero-actions .btn-primary:hover{background:#eef4ff}
    .hero-actions .btn-ghost{background:transparent; color:#fff; border-color:rgba(255,255,255,.24)}
    .hero-metrics{
      display:grid; grid-template-columns:repeat(2,1fr); gap:14px;
    }
    .mini-card,.info-card,.service-card,.case-card,.review-card,.faq-card,.article-card,.price-card,.step-card,.compare-card,.contact-card,.timeline-card,.network-card,.tag-card{
      background:rgba(255,255,255,.92); border:1px solid rgba(219,228,243,.9);
      border-radius:var(--radius); box-shadow:var(--shadow2);
    }
    .mini-card{padding:18px}
    .mini-card strong{display:block; font-size:22px; color:var(--blue2); margin-bottom:6px}
    .mini-card span{font-size:13px; color:var(--muted); line-height:1.6}
    section{padding:18px 0}
    .section-title{
      display:flex; align-items:end; justify-content:space-between; gap:14px; margin-bottom:16px;
    }
    .section-title h2{margin:0; font-size:clamp(22px, 2.5vw, 34px)}
    .section-title p{margin:0; color:var(--muted); line-height:1.7; max-width:64ch}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .info-card, .service-card, .case-card, .review-card, .faq-card, .article-card, .price-card, .step-card, .compare-card, .contact-card, .timeline-card, .network-card, .tag-card{padding:20px}
    .info-card h3,.service-card h3,.case-card h3,.review-card h3,.faq-card h3,.article-card h3,.price-card h3,.step-card h3,.compare-card h3,.contact-card h3,.timeline-card h3,.network-card h3{margin:0 0 10px; font-size:18px}
    .muted{color:var(--muted); line-height:1.75}
    .pill-list{display:flex; flex-wrap:wrap; gap:10px; margin-top:14px}
    .pill{font-size:13px; padding:7px 11px; background:#eef4ff; color:#23406a; border-radius:999px}
    .metrics-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .metric{
      background:linear-gradient(180deg,#fff, #f8fbff);
      border:1px solid var(--line); border-radius:18px; padding:18px;
    }
    .metric b{display:block; font-size:24px; color:var(--blue2)}
    .metric span{display:block; color:var(--muted); margin-top:6px; line-height:1.6}
    .services .service-card{position:relative; overflow:hidden}
    .services .service-card::after{
      content:""; position:absolute; inset:auto -30px -30px auto; width:92px; height:92px; border-radius:30px;
      background:linear-gradient(135deg, rgba(22,93,255,.10), rgba(54,163,255,.02));
    }
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center; margin-bottom:12px;
      background:linear-gradient(135deg, rgba(22,93,255,.14), rgba(54,163,255,.06)); color:var(--blue2); font-weight:800;
    }
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step-card{position:relative}
    .step-card .num{
      display:inline-grid; place-items:center; width:34px; height:34px; border-radius:50%;
      background:var(--blue); color:#fff; font-weight:800; margin-bottom:12px;
    }
    .table-wrap{overflow:auto; border-radius:20px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow2)}
    table{width:100%; border-collapse:collapse; min-width:900px}
    th,td{padding:16px 14px; text-align:left; border-bottom:1px solid #edf2fb; vertical-align:top}
    th{background:#f4f8ff; color:#1f3656; font-size:14px}
    td{color:#24364f; font-size:14px; line-height:1.7}
    .star{color:#ffb020; font-weight:800}
    .compare-highlight{
      background:linear-gradient(180deg,#f4f8ff,#ffffff); border:1px solid #cfe0ff;
    }
    .compare-score{font-size:42px; font-weight:900; color:var(--blue2); line-height:1}
    .compare-badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:14px}
    .small-note{font-size:13px; color:var(--muted)}
    .list{margin:0; padding:0; list-style:none}
    .list li{padding:10px 0; border-bottom:1px dashed #e3eaf6; color:#314968; line-height:1.7}
    .list li:last-child{border-bottom:none}
    .faq-item{border-top:1px solid #eef2f8}
    .faq-item:first-child{border-top:none}
    .faq-q{
      width:100%; background:none; border:none; padding:16px 0; font-size:15px; font-weight:700;
      color:#17304f; display:flex; align-items:center; justify-content:space-between; gap:12px; cursor:pointer; text-align:left;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; color:var(--muted); line-height:1.8}
    .faq-item.open .faq-a{max-height:220px; padding-bottom:16px}
    .faq-plus{color:var(--blue)}
    .reviews .review-card{display:flex; flex-direction:column; gap:12px}
    .review-top{display:flex; align-items:center; justify-content:space-between; gap:12px}
    .avatar{
      width:44px; height:44px; border-radius:14px; background:linear-gradient(135deg,var(--blue),#63b3ff);
      color:#fff; display:grid; place-items:center; font-weight:800;
    }
    .stars{color:#ffb020; letter-spacing:1px}
    .article-card .meta,.case-card .meta{font-size:12px; color:#6b7f97; margin-bottom:10px}
    .article-card h3,.case-card h3{margin-bottom:8px}
    .form{
      display:grid; grid-template-columns:repeat(2,1fr); gap:14px;
    }
    .field{display:flex; flex-direction:column; gap:8px}
    .field.full{grid-column:1 / -1}
    label{font-size:14px; font-weight:700; color:#27405f}
    input,select,textarea{
      width:100%; border:1px solid #d6e0ef; border-radius:14px; background:#fff; color:var(--text);
      padding:13px 14px; font:inherit; outline:none; transition:.2s;
    }
    input:focus,select:focus,textarea:focus{border-color:#7fb0ff; box-shadow:0 0 0 4px rgba(47,140,255,.12)}
    textarea{min-height:120px; resize:vertical}
    .footer{
      margin-top:16px; padding:24px 0 26px; background:#f0f5ff; border-top:1px solid #d9e4f4;
      color:#20344f;
    }
    .footer a{color:#154fca}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:18px; align-items:start}
    .footer small{color:#5d7088}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:6px 10px; background:#fff; border:1px solid #dce6f5; border-radius:999px; font-size:13px}
    .float-tools{
      position:fixed; right:16px; bottom:16px; display:flex; flex-direction:column; gap:10px; z-index:60;
    }
    .float-tools a,.float-tools button{
      width:48px; height:48px; border-radius:16px; border:none; background:var(--blue); color:#fff;
      display:grid; place-items:center; box-shadow:0 14px 30px rgba(22,93,255,.24); cursor:pointer;
    }
    .float-tools a:hover,.float-tools button:hover{transform:translateY(-2px)}
    .sidebar-cards{display:grid; gap:16px}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud .tag{padding:8px 12px; border-radius:999px; background:#eef4ff; color:#23406a; font-size:13px}
    .timeline{display:grid; gap:12px}
    .timeline-item{display:flex; gap:12px; align-items:flex-start}
    .dot{width:12px; height:12px; border-radius:50%; background:var(--blue); margin-top:8px; flex:0 0 auto}
    .network-list{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .network-item{padding:14px; border-radius:16px; background:#f7faff; border:1px solid #e1e9f6}
    .images-row{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .images-row img,.square-grid img{width:100%; border-radius:18px; object-fit:cover; background:#eef4ff; border:1px solid #dfe7f5}
    .images-row img{aspect-ratio:16/10}
    .square-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .square-grid img{aspect-ratio:1/1}
    .mobile-only{display:none}
    .content-wrap{display:grid; grid-template-columns:1.1fr .9fr; gap:16px}
    .sticky-note{
      background:linear-gradient(180deg,#fff, #f8fbff); border:1px solid var(--line); border-radius:20px; padding:20px;
    }
    .label{display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:700; color:#0f4fd6; background:#eaf1ff; padding:7px 10px; border-radius:999px}
    @media (max-width: 1024px){
      .hero-grid,.content-wrap,.footer-grid,.grid-4,.grid-3,.metrics-strip,.workflow,.images-row{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr}
      .hero-main{padding:28px}
    }
    @media (max-width: 768px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .hero-grid,.metrics-strip,.grid-4,.grid-3,.workflow,.content-wrap,.form,.images-row,.square-grid,.network-list{grid-template-columns:1fr}
      .hero{padding-top:26px}
      .hero-main{padding:24px; border-radius:24px}
      .hero p{font-size:15px}
      .section-title{flex-direction:column; align-items:flex-start}
      .table-wrap{border-radius:16px}
      .float-tools{right:12px; bottom:12px}
    }
    .mobile-menu{
      display:none; padding:0 0 14px;
    }
    .mobile-menu.open{display:block}
    .mobile-menu .panel{
      display:grid; gap:8px; padding:14px; background:#fff; border:1px solid var(--line); border-radius:18px;
      box-shadow:var(--shadow2)
    }
    .mobile-menu a{padding:10px 12px; border-radius:12px; background:#f7faff; color:#24415f}
    .reveal{opacity:0; transform:translateY(14px); transition:all .55s ease}
    .reveal.show{opacity:1; transform:none}