:root{
      --theme:#0B3D91;
      --theme-dark:#082b68;
      --ink:#142238;
      --muted:#64748b;
      --line:#d9e2ef;
      --soft:#f3f7fc;
      --white:#fff;
      --shadow:0 16px 40px rgba(16,45,87,.1);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7faff;font-family:"Microsoft YaHei","PingFang SC",Arial,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:0 auto}

    .topbar{background:#092c65;color:#dbe8ff;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:#fff}

    .header{position:relative;background:#fff;border-bottom:1px solid var(--line);z-index:20}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--theme);white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 14px;font-size:14px;font-weight:600;color:#26364e;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);visibility:hidden;opacity:0;pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:.2s;z-index:30}
    .dropdown-panel{width:260px;padding:10px}
    .dropdown-panel a{display:block;padding:10px 12px;border-radius:6px;font-size:13px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .mega-menu{width:min(780px,calc(100vw - 30px));padding:20px}
    .nav-item:hover .dropdown-panel,.nav-item:focus-within .dropdown-panel,.nav-item:hover .mega-menu,.nav-item:focus-within .mega-menu{visibility:visible;opacity:1;pointer-events:auto}
    .mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .mega-title{font-size:13px;font-weight:800;color:var(--theme);margin-bottom:11px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:17px}
    .mega-card{min-width:0;padding:11px;border:1px solid var(--line);border-radius:7px;background:#fbfdff}
    .mega-card:hover{border-color:var(--theme);background:#f4f8ff}
    .mega-card img{width:30px;height:30px;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;padding-top:13px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:8px;white-space:nowrap}
    .member-btn,.open-btn{padding:9px 13px;border-radius:5px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme);border:1px solid #b8cbe7}
    .open-btn{color:#fff;background:var(--theme)}
    .hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:5px;cursor:pointer}
    .hamburger span{display:block;width:21px;height:2px;margin:4px auto;background:var(--theme);transition:.2s}

    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(5,20,45,.48);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(360px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.25s;z-index:50;box-shadow:-10px 0 30px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:18px 20px;background:var(--theme);color:#fff;font-weight:700}
    .drawer-head>a{margin-left:auto;color:#fff}
    .drawer-close{border:0;background:transparent;color:#fff;font-size:26px;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 var(--line);background:transparent;text-align:left;font:inherit;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--muted);font-size:18px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:3px 0 7px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;font-size:13px;color:var(--muted)}

    .tag-page{padding:58px 0 90px}
    .tag-hero{text-align:center;padding:10px 20px 38px}
    .tag-kicker{display:inline-block;padding:5px 11px;border-radius:20px;background:#e5efff;color:var(--theme);font-size:12px;font-weight:800}
    .tag-hero h1{margin:15px 0 8px;font-size:clamp(30px,5vw,48px);line-height:1.15;color:#102d5c}
    .tag-hero p{margin:0 auto;color:var(--muted);font-size:15px}
    .tag-count{margin-top:14px;color:var(--theme);font-size:13px;font-weight:700}
    .tag-content{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:28px;align-items:start}
    .tag-articles{display:grid;gap:16px}
    .tag-article{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 6px 18px rgba(16,45,87,.05)}
    .tag-article img{width:210px;height:145px;object-fit:cover;border-radius:6px;background:#e9f0f8}
    .tag-article h2{margin:5px 0 8px;font-size:20px;line-height:1.35;color:#142f61}
    .tag-article h2 a:hover{color:var(--theme)}
    .article-meta{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:12px}
    .article-summary{margin:8px 0;color:#53657e;font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .article-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px;color:var(--theme);font-size:12px}
    .article-tags span{padding:3px 8px;background:#eff5ff;border-radius:4px}
    .read-link{display:inline-block;margin-top:12px;color:var(--theme);font-size:13px;font-weight:800}
    .tag-sidebar{padding:22px;background:#fff;border:1px solid var(--line);border-radius:8px}
    .tag-sidebar h2{margin:0 0 14px;font-size:18px;color:#17386e}
    .tag-sidebar p{margin:0 0 16px;color:var(--muted);font-size:13px}
    .tag-side-links{display:flex;flex-wrap:wrap;gap:8px}
    .tag-side-links a{padding:7px 10px;border:1px solid #cbd9ed;border-radius:4px;color:var(--theme);font-size:12px}
    .pagination{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
    .pagination a{min-width:36px;padding:7px 11px;text-align:center;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--muted);font-size:13px}
    .pagination a:hover,.pagination a.active{border-color:var(--theme);background:var(--theme);color:#fff}

    .footer{background:#0b2148;color:#c8d7ee;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
    .footer p{margin:7px 0;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div>a{display:block;margin:8px 0;color:#c8d7ee;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);font-size:12px;color:#9eb2d0}

    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns .member-btn{display:none}
      .tag-content{grid-template-columns:1fr}
      .tag-sidebar{order:-1}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:7px 0;display:block;font-size:11px}
      .topbar .container>span{display:block}
      .topbar a{margin:0 12px 0 0}
      .header-inner{min-height:66px;gap:10px}
      .logo{font-size:16px}
      .open-btn{padding:8px 10px;font-size:12px}
      .tag-page{padding:35px 0 60px}
      .tag-article{grid-template-columns:1fr;gap:13px}
      .tag-article img{width:100%;height:190px}
      .tag-article h2{font-size:18px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
      .footer-brand{grid-column:1/-1}
      .mega-grid{grid-template-columns:1fr 1fr}
    }