:root{
      --主题色:#0B3D91;
      --深色:#10233f;
      --浅色:#f5f8fc;
      --边框:#dce5f0;
      --文字:#24354d;
      --次文字:#718096;
      --白色:#fff;
      --阴影:0 16px 44px rgba(16,35,63,.09);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--文字);background:#f7f9fc;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:var(--深色);color:#dce7f7;font-size:13px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid #e7edf5}
    .header-inner{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:inline-flex;align-items:center;gap:10px;color:var(--深色);font-weight:800;white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .logo span{font-size:19px}
    .main-nav{flex:1}
    .nav-list{display:flex;justify-content:center;align-items:stretch;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;height:78px;padding:0 14px;color:#34465f;font-size:15px;font-weight:600}
    .nav-link:hover,.nav-link:focus{color:var(--主题色)}
    .has-arrow:after{content:"";width:6px;height:6px;margin-left:8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:270px;padding:18px;background:#fff;border:1px solid var(--边框);border-radius:0 0 12px 12px;box-shadow:var(--阴影);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
    .mega-menu{width:720px}
    .mega-wide{width:900px}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;pointer-events:auto}
    .dropdown-panel a,.mega-categories a{display:block;padding:8px 10px;border-radius:7px;font-size:14px}
    .dropdown-panel a:hover,.mega-categories a:hover{background:#eef4fb;color:var(--主题色)}
    .dropdown-all,.mega-footer{display:block!important;margin-top:12px;padding-top:12px!important;border-top:1px solid var(--边框);color:var(--主题色);font-weight:700}
    .mega-title{margin:0 0 13px;color:var(--深色);font-size:16px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-width:0;padding:11px;border:1px solid #e4ebf4;border-radius:10px;background:#fbfdff}
    .mega-card:hover{border-color:#a9c0df;transform:translateY(-2px)}
    .mega-card img{width:30px;height:30px;object-fit:contain;margin-bottom:7px}
    .mega-card .video-thumb,.mega-card .product-thumb{width:100%;height:62px;object-fit:cover;border-radius:6px}
    .mega-card strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
    .mega-card p{margin:5px 0 0;color:var(--次文字);font-size:11px;line-height:1.5}
    .mega-meta{display:flex;justify-content:space-between;gap:5px;color:var(--次文字);font-size:10px}
    .mega-columns{display:grid;grid-template-columns:170px 1fr;gap:20px}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .account-btn{padding:9px 15px;border-radius:7px;background:var(--主题色);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;width:42px;height:38px;padding:8px;border:1px solid var(--边框);border-radius:7px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--深色);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;z-index:40;background:rgba(10,23,43,.48);opacity:0;visibility:hidden;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;z-index:41;top:0;right:0;width:min(360px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.25s;box-shadow:-10px 0 30px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--边框)}
    .drawer-head>a{margin-left:auto;padding:6px 11px;border-radius:5px;background:var(--主题色);color:#fff;font-size:13px}
    .drawer-close{border:0;background:transparent;color:#52627a;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf1f6;background:none;color:var(--深色);text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--次文字);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 7px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--次文字);font-size:14px}
    .footer{margin-top:70px;background:var(--深色);color:#bdcbe0}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;padding:52px 0 42px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{margin:8px 0;color:#9fb0c8;font-size:13px}
    .footer h3{margin:3px 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact p{margin:8px 0;font-size:13px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#91a4bf}
    .article-page{padding:42px 0 10px}
    .article-shell{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:30px;align-items:start}
    .article-main-card,.article-sidebar-card{background:#fff;border:1px solid var(--边框);border-radius:16px;box-shadow:0 8px 28px rgba(28,55,92,.05)}
    .article-main-card{padding:38px 44px}
    .article-kicker{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--主题色);font-size:13px;font-weight:700}
    .article-kicker:before{content:"";width:24px;height:2px;background:var(--主题色)}
    .article-title{margin:0;color:var(--深色);font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:-.02em}
    .article-meta{display:flex;flex-wrap:wrap;gap:16px;margin:18px 0 26px;padding-bottom:18px;border-bottom:1px solid var(--边框);color:var(--次文字);font-size:13px}
    .article-cover{width:100%;max-height:460px;object-fit:cover;border-radius:12px;margin:0 0 28px}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;color:#40536d;font-size:16px}
    .article-content>*{max-width:100%}
    .article-content h2,.article-content h3{color:var(--深色);line-height:1.4;margin:30px 0 13px}
    .article-content h2{font-size:24px;border-left:4px solid var(--主题色);padding-left:12px}
    .article-content h3{font-size:19px}
    .article-content p{margin:0 0 18px}
    .article-content img,.article-content video{max-width:100%;height:auto}
    .article-content table{max-width:100%;border-collapse:collapse}
    .article-content th,.article-content td{padding:9px 12px;border:1px solid var(--边框)}
    .article-content blockquote{margin:22px 0;padding:15px 20px;border-left:4px solid #8da8ce;background:#f2f6fb;color:#526982}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px;padding-top:20px;border-top:1px solid var(--边框)}
    .article-tags a{padding:5px 11px;border-radius:20px;background:#edf3fa;color:var(--主题色);font-size:12px}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
    .pager-item{padding:15px;border:1px solid var(--边框);border-radius:10px;background:#fff}
    .pager-item small{display:block;margin-bottom:5px;color:var(--次文字)}
    .pager-item.next{text-align:right}
    .sidebar-title{margin:0;padding:18px 20px;border-bottom:1px solid var(--边框);color:var(--深色);font-size:17px}
    .sidebar-list{padding:9px 20px 16px}
    .sidebar-list a{display:block;padding:12px 0;border-bottom:1px solid #edf1f6;font-size:14px}
    .sidebar-list a:last-child{border-bottom:0}
    .sidebar-list a:hover{color:var(--主题色)}
    .like-section{margin-top:30px}
    .like-title{margin:0 0 14px;color:var(--深色);font-size:21px}
    .like-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .like-card{padding:17px;background:#fff;border:1px solid var(--边框);border-radius:11px}
    .like-card h3{margin:0 0 8px;color:var(--深色);font-size:15px;line-height:1.45}
    .like-card p{margin:0;color:var(--次文字);font-size:12px}
    @media(max-width:1050px){
      .nav-link{padding:0 8px;font-size:13px}
      .header-inner{gap:14px}
      .mega-menu{left:auto;right:0;transform:none}
    }
    @media(max-width:800px){
      .container{width:min(100% - 28px,680px)}
      .topbar-inner{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;gap:8px}
      .topbar-contact{flex-direction:column;gap:0;text-align:right}
      .main-nav{display:none}
      .header-inner{height:68px}
      .header-btns{margin-left:auto}
      .hamburger{display:block}
      .article-page{padding-top:24px}
      .article-shell{display:block}
      .article-main-card{padding:25px 20px}
      .article-sidebar-card{margin-top:20px}
      .footer-main{grid-template-columns:1fr 1fr;gap:26px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin:5px 0}
      .like-grid{grid-template-columns:1fr}
    }
    @media(max-width:520px){
      .topbar-welcome{font-size:11px}
      .topbar-contact{font-size:11px}
      .logo span{font-size:16px}
      .account-btn{display:none}
      .article-title{font-size:29px}
      .article-meta{gap:9px;font-size:12px}
      .article-pager{grid-template-columns:1fr}
      .pager-item.next{text-align:left}
      .footer-main{grid-template-columns:1fr}
    }