:root{--theme:#0B3D91;--ink:#101827;--muted:#6d7b90;--line:#dfe6ef;--soft:#f4f7fb;--white:#fff;--accent:#27d6e8}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f5f8fc;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.6}
    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{height:38px;background:#07152d;color:#b8c9e4;font-size:12px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#b8c9e4}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid #e7edf5}
    .header-inner{height:78px;display:flex;align-items:center;gap:42px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:#0b2045;font-weight:800;font-size:18px}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;height:78px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative;display:flex;align-items:center}
    .nav-link{display:flex;align-items:center;height:78px;padding:0 14px;color:#34445d;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:.2s ease;background:#fff;border:1px solid #e4eaf2;box-shadow:0 18px 42px rgba(18,39,72,.16);border-radius:0 0 8px 8px}
    .dropdown-panel{width:290px;padding:18px}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;height:12px;top:-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;transform:translate(-50%,0)}
    .dropdown-title,.mega-heading{margin-bottom:10px;color:#102b59;font-size:13px;font-weight:800}
    .dropdown-panel>a{display:block;padding:8px 0;border-bottom:1px solid #edf1f6;color:#506078;font-size:13px}
    .dropdown-panel>a:last-child{border:0;color:var(--theme);font-weight:700}
    .mega-menu{width:720px;padding:24px}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
    .mega-list{display:grid;gap:8px}
    .mega-list>a{display:flex;align-items:center;gap:10px;padding:7px;border-radius:5px}
    .mega-list>a:hover{background:#f3f7fc}
    .mega-list img{width:30px;height:30px;object-fit:contain;border-radius:4px;background:#f0f4f9}
    .mega-list>a>span{min-width:0}
    .mega-item-title,.mega-item-meta{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-item-title{color:#243653;font-size:13px;font-weight:700}
    .mega-item-meta{color:#8190a5;font-size:11px}
    .mega-categories{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
    .mega-categories a{padding:8px 10px;background:#f4f7fb;border-radius:4px;color:#52627b;font-size:12px}
    .mega-tools{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0}
    .mega-tools span{padding:5px 8px;background:#eef5ff;color:var(--theme);border-radius:3px;font-size:11px}
    .mega-footer{display:inline-block;margin-top:10px;color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{color:var(--theme);font-size:13px;font-weight:700}
    .account-btn{padding:9px 16px;border-radius:4px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;width:40px;height:40px;padding:9px;border:1px solid #dbe4f0;background:#fff;border-radius:4px;cursor:pointer}
    .hamburger span{display:block;width:20px;height:2px;margin:4px auto;background:#17345f;transition:.2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;z-index:40;background:rgba(4,17,38,.55);opacity:0;visibility:hidden;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;z-index:41;width:min(380px,88vw);overflow:auto;background:#fff;transform:translateX(100%);transition:.25s;box-shadow:-10px 0 30px rgba(5,22,50,.2)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head>a{margin-left:auto;padding:6px 13px;background:var(--theme);color:#fff;border-radius:4px;font-size:13px}
    .drawer-close{border:0;background:none;color:#65738a;font-size:26px;line-height:1;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:15px 0;border:0;border-bottom:1px solid #edf1f6;background:none;color:#263956;text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:#8290a5;font-size:18px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{max-height:0;overflow:hidden;transition:.25s;padding-left:14px}
    .drawer-submenu.open{max-height:700px}
    .drawer-submenu a{display:block;padding:9px 0;color:#687991;font-size:13px}
    .footer{margin-top:80px;background:#07152d;color:#afbdd2}
    .footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:42px;padding:54px 0 42px}
    .footer-brand img{width:38px;height:38px;object-fit:contain;margin-bottom:14px}
    .footer h3{margin:0 0 8px;color:#fff;font-size:18px}
    .footer h4{margin:0 0 15px;color:#fff;font-size:14px}
    .footer p{max-width:270px;margin:0;color:#8fa2bd;font-size:13px}
    .footer-links,.footer-contact{display:grid;gap:9px;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.1);color:#8294af;font-size:12px}
    .category-page{padding:58px 0 10px}
    .page-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px;padding-bottom:24px;border-bottom:1px solid var(--line)}
    .heading-kicker{margin:0 0 8px;color:var(--theme);font-size:12px;font-weight:800;letter-spacing:1px}
    .page-heading h1{margin:0;color:#102a54;font-size:34px;line-height:1.25}
    .page-intro{max-width:520px;margin:0;color:var(--muted);font-size:14px}
    .article-list{display:grid;gap:18px}
    .article-card{display:grid;grid-template-columns:300px minmax(0,1fr);min-width:0;overflow:hidden;background:#fff;border:1px solid #e2e9f2;border-radius:7px;box-shadow:0 8px 24px rgba(24,54,92,.05);transition:.2s}
    .article-card:hover{border-color:#b8cce6;box-shadow:0 12px 28px rgba(24,54,92,.1);transform:translateY(-2px)}
    .article-cover{min-height:210px;background:#dfe8f3}
    .article-cover img{width:100%;height:100%;min-height:210px;object-fit:cover}
    .article-body{min-width:0;padding:23px 28px}
    .article-label{display:inline-block;margin-bottom:9px;color:var(--theme);font-size:12px;font-weight:800}
    .article-title{display:block;margin:0 0 10px;color:#142e58;font-size:21px;line-height:1.4}
    .article-summary{display:-webkit-box;overflow:hidden;margin:0 0 15px;color:#68788e;font-size:14px;line-height:1.8;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .article-meta{display:flex;flex-wrap:wrap;gap:7px 18px;margin-bottom:16px;color:#8a98aa;font-size:12px}
    .article-tags{display:inline-flex;flex-wrap:wrap;gap:6px;margin-right:16px;color:#708099;font-size:12px}
    .article-tags span{padding:3px 8px;border:1px solid #dce5f0;border-radius:3px}
    .article-actions{display:flex;align-items:center;flex-wrap:wrap;gap:14px}
    .read-more{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800}
    .read-more:after{content:"→";font-size:16px}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:38px}
    .pagination a{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 12px;border:1px solid #dce5ef;border-radius:4px;background:#fff;color:#60718b;font-size:13px}
    .pagination a:hover,.pagination a.active{border-color:var(--theme);background:var(--theme);color:#fff}
    @media (max-width:1050px){
      .header-inner{gap:18px}
      .logo{min-width:155px}
      .nav-link{padding:0 8px}
      .mega-menu{width:680px}
    }
    @media (max-width:820px){
      .container{width:min(100% - 30px,620px)}
      .topbar{height:auto;padding:9px 0}
      .topbar-inner{height:auto;align-items:flex-start;gap:4px;flex-direction:column}
      .topbar-links{gap:14px}
      .header-inner{height:68px}
      .main-nav{display:none}
      .header-btns{margin-left:auto}
      .member-link{display:none}
      .hamburger{display:block}
      .category-page{padding-top:38px}
      .page-heading{display:block;margin-bottom:22px}
      .page-heading h1{font-size:29px}
      .page-intro{margin-top:12px}
      .article-card{grid-template-columns:1fr}
      .article-cover,.article-cover img{height:220px;min-height:220px}
      .article-body{padding:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding:40px 0 30px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }
    @media (max-width:500px){
      .footer-grid{grid-template-columns:1fr}
      .article-cover,.article-cover img{height:190px;min-height:190px}
      .article-title{font-size:18px}
      .article-summary{font-size:13px}
    }