:root{--theme:#0B3D91;--ink:#10213f;--muted:#62708a;--line:#dce4ef;--paper:#f5f8fc;--white:#fff;--accent:#e7a93b}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);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}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#071a3b;color:#dce8ff;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{margin-left:18px;color:#dce8ff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;font-weight:800;color:var(--theme);font-size:18px}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 14px;color:#253653;font-size:15px;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:calc(100% + 1px);left:50%;transform:translateX(-50%);display:none;background:#fff;border:1px solid var(--line);box-shadow:0 18px 50px rgba(16,33,63,.14);border-radius:0 0 8px 8px}
    .dropdown-panel{width:260px;padding:12px}
    .dropdown-panel a{display:block;padding:9px 10px;border-bottom:1px solid #edf1f6;font-size:14px}
    .dropdown-panel a:last-child{color:var(--theme);font-weight:700;border-bottom:0}
    .mega-menu{width:650px;padding:20px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{display:block}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-14px;left:0;right:0;height:14px}
    .mega-title{margin:0 0 12px;color:var(--theme);font-size:13px;font-weight:800}
    .mega-title:not(:first-child){margin-top:18px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:10px;border:1px solid #e7edf5;border-radius:6px;background:#fbfcfe;min-width:0}
    .mega-card:hover{border-color:#9db5dc;background:#f2f6fd}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:6px}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis}
    .mega-card strong{font-size:13px;white-space:nowrap}
    .mega-card small{margin-top:3px;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:16px;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:8px;flex:0 0 auto}
    .member-btn,.open-btn{padding:8px 13px;border-radius:4px;font-size:13px;font-weight:700;white-space:nowrap}
    .member-btn{color:var(--theme);border:1px solid #b8c9e5}
    .open-btn{color:#fff;background:var(--theme)}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);background:#fff;border-radius:4px;cursor:pointer;padding:9px}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--theme);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{display:none;position:fixed;inset:0;z-index:30;background:rgba(3,16,39,.52)}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:31;top:0;right:-360px;width:min(360px,88vw);height:100vh;overflow:auto;background:#fff;transition:right .25s ease;box-shadow:-10px 0 30px rgba(0,0,0,.18)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head>a{margin-left:auto;padding:5px 9px;background:var(--theme);color:#fff;border-radius:3px;font-size:13px}
    .drawer-close{border:0;background:none;color:var(--ink);font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:8px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;text-align:left;border:0;border-bottom:1px solid #edf1f6;background:none;color:var(--ink);font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-weight:700}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px;border-bottom:1px solid #edf1f6}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#071a3b;color:#cbd8ef}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding:46px 0 36px}
    .footer strong{color:#fff;font-size:20px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:8px 0;font-size:13px}
    .footer a{display:block;margin:8px 0;color:#cbd8ef;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-brand p{color:#aebed9}
    .footer-bottom{padding:17px 0;border-top:1px solid rgba(255,255,255,.14);color:#aebed9;font-size:12px}
    .article-page{padding:46px 0 20px}
    .article-shell{display:grid;grid-template-columns:minmax(0,780px) 280px;gap:38px;align-items:start}
    .article-main{min-width:0;background:#fff;border:1px solid var(--line);padding:36px 42px;border-radius:8px}
    .article-breadcrumb{margin-bottom:18px;color:var(--muted);font-size:13px}
    .article-breadcrumb a{color:var(--theme)}
    .article-title{margin:0 0 16px;color:#0c2349;font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:12px 22px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
    .article-cover{width:100%;max-height:430px;object-fit:cover;margin:24px 0;border-radius:5px}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;color:#293a56;font-size:16px}
    .article-content p{margin:0 0 1.2em}
    .article-content h2{margin:2em 0 .7em;padding-left:13px;border-left:4px solid var(--accent);color:#102b59;font-size:25px}
    .article-content h3{margin:1.5em 0 .6em;color:var(--theme);font-size:20px}
    .article-content img,.article-content table{max-width:100%;height:auto}
    .article-content table{border-collapse:collapse}
    .article-content td,.article-content th{padding:8px;border:1px solid var(--line)}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
    .article-tags a{padding:4px 10px;background:#edf3fc;color:var(--theme);border-radius:3px;font-size:12px}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
    .article-pager a{padding:13px 15px;border:1px solid var(--line);border-radius:5px;font-size:13px}
    .article-pager a:last-child{text-align:right}
    .article-pager span{display:block;color:var(--muted);font-size:11px;margin-bottom:4px}
    .article-side{position:sticky;top:20px}
    .side-panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px;margin-bottom:18px}
    .side-panel h2{margin:0 0 14px;padding-bottom:11px;border-bottom:2px solid var(--theme);font-size:17px}
    .like-list{list-style:none;padding:0;margin:0}
    .like-list li{padding:11px 0;border-bottom:1px solid #edf1f6}
    .like-list li:last-child{border-bottom:0}
    .like-list a{display:block;font-size:14px;line-height:1.5}
    .like-list small{display:block;margin-top:4px;color:var(--muted);font-size:11px}
    .side-cta{background:var(--theme);color:#fff;border-radius:8px;padding:20px}
    .side-cta h2{margin:0 0 8px;font-size:18px}
    .side-cta p{margin:0 0 15px;color:#dce8ff;font-size:13px}
    .side-cta a{display:inline-block;padding:8px 13px;background:#fff;color:var(--theme);border-radius:4px;font-size:13px;font-weight:700}
    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .article-shell{grid-template-columns:minmax(0,1fr)}
      .article-side{position:static;display:grid;grid-template-columns:1fr 1fr;gap:18px}
      .side-panel,.side-cta{margin-bottom:0}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{display:block;padding:7px 0}
      .topbar .container>span{display:block}
      .topbar a{margin:0 14px 0 0}
      .header-inner{min-height:66px;gap:10px}
      .header-btns{margin-left:auto}
      .member-btn{display:none}
      .open-btn{padding:7px 9px}
      .article-page{padding-top:24px}
      .article-main{padding:24px 18px}
      .article-title{font-size:29px}
      .article-content{font-size:15px}
      .article-pager{grid-template-columns:1fr}
      .article-pager a:last-child{text-align:left}
      .article-side{display:block}
      .side-panel,.side-cta{margin-bottom:18px}
      .footer{margin-top:38px}
      .footer-grid{grid-template-columns:1fr;gap:22px;padding:32px 0 25px}
    }