:root{
      --theme:#0B3D91;
      --ink:#14213d;
      --muted:#667085;
      --line:#e5eaf2;
      --paper:#ffffff;
      --soft:#f4f7fb;
      --accent:#e8b44d;
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:"PingFang SC","Microsoft YaHei",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:#081b3d;color:#d8e5ff;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#d8e5ff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 18px rgba(16,35,70,.05)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--theme);font-size:19px;font-weight:800}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{list-style:none;padding:0;margin:0;display:flex;align-items:stretch;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 13px;color:#263858;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;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%) translateY(8px);width:300px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:0 18px 45px rgba(20,42,85,.15);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:620px}
    .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;height:12px;top:-12px}
    .panel-title{margin:0 0 12px;color:var(--theme);font-size:14px;font-weight:800}
    .panel-list{display:grid;gap:8px}
    .panel-list a{display:block;padding:6px 8px;border-radius:8px;color:#45546e;font-size:13px}
    .panel-list a:hover{background:#eef4ff;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:9px;min-width:0;padding:10px;border:1px solid #edf0f5;border-radius:10px}
    .mega-card:hover{border-color:#b8ccef;background:#f8fbff}
    .mega-card img{width:38px;height:38px;object-fit:contain;border-radius:7px;background:#f2f5fa;flex:0 0 auto}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:12px;color:#263858}
    .mega-card small{font-size:10px;color:#8490a3;line-height:1.6}
    .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:10px;flex-shrink:0}
    .member-link,.open-link{padding:9px 13px;border-radius:8px;font-size:13px}
    .member-link{color:var(--theme);border:1px solid #c8d6ee}
    .open-link{background:var(--theme);color:#fff}
    .hamburger{display:none;width:42px;height:40px;border:0;background:transparent;cursor:pointer;padding:8px}
    .hamburger span{display:block;width:24px;height:2px;margin:5px auto;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:rgba(3,18,45,.48);opacity:0;visibility:hidden;transition:.25s;z-index:50}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.3s;z-index:51;overflow:auto;box-shadow:-15px 0 35px rgba(0,0,0,.16)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:70px;padding:0 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head span{margin-right:auto}
    .drawer-head a{font-size:13px;color:var(--theme)}
    .drawer-close{border:0;background:transparent;font-size:28px;color:#69768b;cursor:pointer}
    .drawer-menu{padding:12px 20px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;color:#243653;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:#8090a9}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{max-height:0;overflow:hidden;transition:max-height .25s;padding-left:14px}
    .drawer-submenu.open{max-height:600px}
    .drawer-submenu a{display:block;padding:9px 0;color:#66748b;font-size:13px}
    .footer{margin-top:70px;background:#091b3b;color:#b8c7df}
    .footer .container{padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
    .footer-brand{margin-bottom:12px;color:#fff;font-size:20px;font-weight:800}
    .footer p{margin:7px 0;color:#a9b9d2;font-size:13px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#91a5c4}
    .article-page{padding:42px 0 0}
    .article-layout{display:grid;grid-template-columns:minmax(0,780px) 300px;gap:34px;align-items:start}
    .article-main,.article-sidebar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(20,42,85,.04)}
    .article-main{padding:38px 44px}
    .article-kicker{display:inline-flex;padding:5px 11px;border-radius:999px;background:#eaf1ff;color:var(--theme);font-size:12px;font-weight:700}
    .article-title{margin:16px 0 12px;font-size:clamp(28px,4vw,42px);line-height:1.25;letter-spacing:-.02em;color:#12284e}
    .article-meta{display:flex;flex-wrap:wrap;gap:16px;padding-bottom:23px;border-bottom:1px solid var(--line);color:#7d899c;font-size:13px}
    .article-cover{margin:28px 0;border-radius:13px;overflow:hidden;background:#eef3fa}
    .article-cover img{width:100%;max-height:430px;object-fit:cover}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;color:#35445e;font-size:16px}
    .article-content p{margin:0 0 1.2em}
    .article-content h2,.article-content h3{color:#142d59;line-height:1.4;margin:1.7em 0 .7em}
    .article-content h2{font-size:25px;border-left:4px solid var(--theme);padding-left:12px}
    .article-content h3{font-size:20px}
    .article-content img,.article-content table{max-width:100%;height:auto}
    .article-content blockquote{margin:22px 0;padding:15px 20px;border-left:4px solid var(--accent);background:#fff9eb;color:#66552e}
    .article-content a{color:var(--theme);text-decoration:underline}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}
    .article-tags a{padding:5px 10px;border-radius:999px;background:#f0f4fa;color:#52617a;font-size:12px}
    .article-sidebar{padding:22px;position:sticky;top:20px}
    .sidebar-title{margin:0 0 15px;color:#172e57;font-size:17px}
    .sidebar-list{display:grid;gap:13px}
    .sidebar-item{display:block;padding-bottom:13px;border-bottom:1px solid #edf0f5}
    .sidebar-item strong{display:block;color:#334462;font-size:13px;line-height:1.55}
    .sidebar-item small{display:block;margin-top:4px;color:#8a96a8;font-size:11px}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
    .pager-item{min-width:0;padding:14px;border:1px solid var(--line);border-radius:11px;background:#fbfcfe}
    .pager-item:last-child{text-align:right}
    .pager-label{display:block;margin-bottom:4px;color:#8995a8;font-size:12px}
    .pager-item strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--theme);font-size:13px}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .article-layout{grid-template-columns:1fr}
      .article-sidebar{position:static}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;padding:9px 0;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:66px;gap:10px}
      .logo span{font-size:16px}
      .member-link,.open-link{display:none}
      .article-page{padding-top:22px}
      .article-main{padding:24px 18px}
      .article-title{font-size:29px}
      .article-meta{gap:8px 13px}
      .article-content{font-size:15px}
      .article-pager{grid-template-columns:1fr}
      .pager-item:last-child{text-align:left}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:5px}
      .mega-menu,.dropdown-panel{display:none}
    }