:root{--theme:#0B3D91;--ink:#101318;--muted:#68717d;--line:#dfe4ea;--paper:#f5f6f8;--white:#fff}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.6}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#0c1118;color:#c9d1db;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-info{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;font-size:19px;letter-spacing:.02em}
    .logo img{width:38px;height:38px;object-fit:contain}
    .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:76px;padding:0 15px;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-visible{color:var(--theme)}
    .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:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:310px;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 50px #1013181c;border-radius:0 0 12px 12px;opacity:0;visibility:hidden;transition:.2s ease}
    .mega-menu{width:650px}
    .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:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a{display:block;padding:9px 4px;border-bottom:1px solid #edf0f3;font-size:14px}
    .dropdown-panel>a:hover,.mega-card:hover{color:var(--theme)}
    .mega-heading{margin:0 0 14px;font-size:15px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
    .mega-card{display:flex;flex-direction:column;gap:3px;padding:11px;border:1px solid #e5e9ee;border-radius:8px;background:#fbfcfd;min-height:76px}
    .mega-card strong{font-size:13px}
    .mega-card small{color:var(--muted);font-size:11px;line-height:1.4}
    .mega-card img{width:22px;height:22px;object-fit:contain}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-link{font-size:13px;color:var(--theme);font-weight:700}
    .open-link{padding:9px 15px;background:var(--theme);color:#fff;border-radius:5px;font-size:13px;font-weight:700}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--ink);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:#07101c99;opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;z-index:41;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:13px}
    .drawer-close{border:0;background:none;font-size:27px;line-height:1;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f3;background:none;text-align:left;font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#0d131b;color:#b9c3ce;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
    .footer-brand{color:#fff;font-weight:800;font-size:20px;margin-bottom:12px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer p{margin:7px 0;font-size:13px}
    .footer-grid a{display:block;margin:7px 0;color:#b9c3ce;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:18px;border-top:1px solid #26313d;font-size:12px}
    .category-page{padding:68px 0 0}
    .category-intro{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:32px;padding-bottom:26px;border-bottom:1px solid var(--line)}
    .category-kicker{margin:0 0 8px;color:var(--theme);font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
    .category-intro h1{margin:0;font-size:clamp(32px,5vw,58px);line-height:1.05;letter-spacing:-.04em}
    .category-intro p{max-width:480px;margin:0;color:var(--muted);font-size:15px}
    .article-list{display:grid;gap:18px}
    .article-card{display:grid;grid-template-columns:300px 1fr;gap:25px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 24px #10131808;transition:.2s}
    .article-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px #10131812}
    .article-cover{min-height:205px;background:#e9edf2;border-radius:8px;overflow:hidden}
    .article-cover img{width:100%;height:100%;min-height:205px;object-fit:cover}
    .article-body{min-width:0;padding:3px 8px 4px 0}
    .article-label{display:inline-block;margin-bottom:9px;color:var(--theme);font-size:12px;font-weight:800}
    .article-body h2{margin:0 0 10px;font-size:24px;line-height:1.3}
    .article-summary{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;margin:0 0 15px;color:#59636e;font-size:14px;line-height:1.8}
    .article-meta{display:flex;flex-wrap:wrap;gap:13px;color:#7b858f;font-size:12px}
    .article-tags{margin-top:12px;color:var(--theme);font-size:12px}
    .read-more{display:inline-block;margin-top:15px;color:var(--theme);font-size:13px;font-weight:800}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:34px}
    .pagination a{min-width:36px;padding:7px 11px;border:1px solid var(--line);background:#fff;border-radius:5px;text-align:center;font-size:13px}
    .pagination a.active,.pagination a:hover{background:var(--theme);border-color:var(--theme);color:#fff}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{height:68px;gap:12px}
      .nav-link{height:68px}
      .logo{min-width:0}
      .member-link{display:none}
      .category-intro{display:block}
      .category-intro p{margin-top:18px}
    }
    @media(max-width:650px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{display:block;padding:8px 0}
      .topbar-info{gap:12px;margin-top:3px}
      .open-link{padding:8px 10px}
      .category-page{padding-top:42px}
      .article-card{grid-template-columns:1fr;padding:12px;gap:16px}
      .article-cover,.article-cover img{min-height:190px;height:190px}
      .article-body{padding:0 4px 8px}
      .article-body h2{font-size:21px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }