:root{--theme:#0B3D91;--ink:#10233f;--muted:#66758b;--line:#dce5ef;--soft:#f4f8fc;--white:#fff;--accent:#36b8e8}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7faff;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:auto}
    .topbar{background:#07172d;color:#b9c9dc;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}.topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid #e7edf4}
    .header-inner{height:76px;display:flex;align-items:center;gap:35px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;color:var(--theme);font-size:20px;font-weight:800}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}.nav-list{display:flex;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}.nav-link{display:block;padding:25px 14px;color:#31435e;font-size:15px;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 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;z-index:30;visibility:hidden;opacity:0;transform:translate(-50%,8px);transition:.2s ease;background:#fff;border:1px solid #e1eaf3;box-shadow:0 18px 45px #0b26421c}
    .dropdown-panel{width:250px;padding:12px;border-radius:0 0 12px 12px}.dropdown-panel a{display:block;padding:9px 12px;font-size:14px}.dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .mega-menu{width:min(850px,90vw);padding:22px;border-radius:0 0 16px 16px}
    .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;transform:translate(-50%,0)}
    .mega-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:15px}.mega-heading strong{font-size:17px}.mega-heading span{font-size:12px;color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:grid;grid-template-columns:42px 1fr;gap:0 10px;padding:12px;border:1px solid var(--line);border-radius:10px}
    .mega-card:hover{border-color:var(--accent);background:#f8fcff}.mega-card img{grid-row:span 3;width:42px;height:42px;object-fit:contain}
    .mega-card strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mega-card small{display:block;color:var(--muted);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-footer{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);color:var(--theme);font-size:13px}
    .header-btns{display:flex;align-items:center;gap:12px}.member-link{color:var(--theme);font-size:14px;font-weight:700}.account-link{padding:9px 17px;border-radius:20px;background:var(--theme);color:#fff;font-size:13px}
    .hamburger{display:none;width:40px;height:40px;padding:9px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}.hamburger span{display:block;height:2px;margin:5px 0;background:var(--theme);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;z-index:40;background:#06162b99;opacity:0;visibility:hidden;transition:.2s}.drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;z-index:50;width:min(370px,88vw);overflow:auto;background:#fff;transform:translateX(100%);transition:.25s ease}.mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line)}.drawer-head strong{flex:1;color:var(--theme)}.drawer-head a{padding:5px 13px;border-radius:16px;background:var(--theme);color:#fff;font-size:13px}.drawer-close{border:0;background:none;font-size:28px;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf1f5;background:none;text-align:left;color:var(--ink);cursor:pointer}.drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}.drawer-toggle.active:after{content:"−"}.drawer-submenu{display:none;padding:5px 0 8px 15px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .article-page{padding:58px 0 80px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:start}
    .article-main,.article-side{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 28px #16365b09}
    .article-main{padding:clamp(24px,5vw,58px)}.article-kicker{display:inline-flex;padding:5px 12px;border-radius:20px;background:#eaf6fd;color:#087fae;font-size:13px;font-weight:700}
    .article-main h1{margin:17px 0 15px;font-size:clamp(30px,4vw,50px);line-height:1.2;letter-spacing:-.03em;color:#0a1d37}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;padding-bottom:24px;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}.article-meta strong{color:var(--theme)}
    .article-cover{width:100%;max-height:480px;object-fit:cover;margin:28px 0;border-radius:12px;background:#edf4fa}
    .article-summary{padding:18px 20px;border-left:4px solid var(--accent);background:#f2f8fc;color:#40536d;font-size:17px}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;color:#263951;font-size:16px}.article-content img,.article-content table{max-width:100%}.article-content h2{margin:32px 0 12px;color:var(--theme);font-size:25px}.article-content h3{margin:25px 0 8px;font-size:20px}.article-content p{margin:16px 0}.article-content blockquote{margin:24px 0;padding:15px 20px;background:var(--soft);border-radius:8px;color:#52647b}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}.article-tags a{padding:5px 11px;border-radius:16px;background:#edf3f8;color:#58708d;font-size:12px}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px}.article-pager a{padding:15px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:14px}.article-pager a:hover{border-color:var(--accent);color:var(--theme)}
    .article-side{padding:22px;position:sticky;top:20px}.article-side h2{margin:0 0 18px;font-size:19px;color:var(--theme)}.side-list{display:grid;gap:14px}.side-item{display:block;padding-bottom:14px;border-bottom:1px solid #edf1f5}.side-item strong{display:block;font-size:14px;line-height:1.5}.side-item small{display:block;margin-top:4px;color:var(--muted);font-size:12px}
    .side-cta{margin-top:22px;padding:18px;border-radius:12px;background:linear-gradient(135deg,#0b3d91,#126ca9);color:#fff}.side-cta strong{display:block;font-size:17px}.side-cta p{margin:6px 0 14px;color:#d9effb;font-size:13px}.side-cta a{display:inline-block;padding:7px 13px;border-radius:18px;background:#fff;color:var(--theme);font-size:13px}
    .footer{padding:55px 0 20px;background:#07172d;color:#b9c9dc}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:35px}.footer-brand strong{color:#fff;font-size:20px}.footer p{margin:12px 0;font-size:13px}.footer h3{margin:0 0 13px;color:#fff;font-size:15px}.footer-grid>div:not(.footer-brand) a,.footer-grid>div:not(.footer-brand) span{display:block;margin:7px 0;font-size:13px}.footer a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:15px;margin-top:35px;padding-top:18px;border-top:1px solid #ffffff1a;font-size:12px}
    @media(max-width:960px){.header-inner{gap:15px}.main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}.mega-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.article-side{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar .container{display:block;padding:7px 0}.topbar-links{gap:12px}.header-inner{height:66px}.logo{font-size:17px}.logo img{width:30px;height:30px}.member-link{display:none}.account-link{padding:7px 12px}.article-page{padding:28px 0 50px}.article-main{padding:22px 18px;border-radius:12px}.article-main h1{font-size:31px}.article-summary{font-size:15px}.article-content{font-size:15px}.article-pager{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}.mega-grid{grid-template-columns:1fr}}