:root{--theme:#0B3D91;--ink:#242b34;--muted:#68717d;--line:#e5e8ec;--paper:#fff;--soft:#f5f7fa;--accent:#bd8a3c}
    *{box-sizing:border-box}
    body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%}
    button{font:inherit}
    .container{width:min(1200px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#202832;color:#dce1e7;font-size:12px}
    .topbar .container{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .topbar a{margin-left:18px;color:#dce1e7}
    .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:none;font-weight:750;font-size:19px;color:#202832}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 12px;font-size:14px;font-weight:600;white-space:nowrap}
    .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:100%;left:0;z-index:30;display:none;width:300px;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:0 16px 36px #17212b1c}
    .dropdown-panel a{display:block;padding:9px 8px;border-bottom:1px solid #f0f1f3;font-size:13px}
    .mega-menu{width:560px;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;left:0;right:0;top:-10px;height:10px}
    .mega-title{margin:0 0 10px;color:#59616c;font-size:13px;font-weight:700}
    .mega-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
    .mega-grid>a{min-width:0;padding:10px;border:1px solid #edf0f3;background:#fff;font-size:13px}
    .mega-grid strong,.mega-grid small{display:block}
    .mega-grid small{margin-top:4px;color:var(--muted);font-size:11px}
    .mega-grid .product-mini{display:grid;grid-template-columns:28px 1fr;gap:0 9px;align-items:center}
    .product-mini img{grid-row:span 2;width:28px;height:28px;object-fit:contain}
    .mega-footer{display:inline-block;margin-top:14px;color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;flex:none}
    .member-btn{font-size:13px;color:#4c5560}
    .open-btn{padding:9px 15px;background:var(--theme);color:white;font-size:13px;font-weight:700}
    .hamburger{display:none;width:40px;height:40px;padding:10px;border:1px solid var(--line);background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:#29313a;transition:transform .2s,opacity .2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;z-index:40;visibility:hidden;background:#151b22a6;opacity:0;transition:.2s}
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{position:fixed;top:0;right:0;z-index:41;width:min(390px,90vw);height:100dvh;overflow:auto;background:#fff;transform:translateX(100%);transition:transform .25s}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{position:sticky;top:0;display:flex;align-items:center;gap:12px;padding:16px;background:#fff;border-bottom:1px solid var(--line)}
    .drawer-head strong{flex:1;min-width:0;font-size:14px}
    .drawer-head>a{padding:7px 12px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{width:34px;height:34px;border:1px solid var(--line);background:#fff;font-size:23px;line-height:1;cursor:pointer}
    .drawer-menu{padding:8px 16px 24px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 4px;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font-size:14px;font-weight:650;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--muted)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 12px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 4px;color:#58616c;font-size:13px}
    .footer{margin-top:72px;background:#202832;color:#d8dde3}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding:46px 0 36px}
    .footer-grid h3{margin:0 0 14px;color:#fff;font-size:14px}
    .footer-grid a{display:block;margin:8px 0;color:#d8dde3;font-size:13px}
    .footer-grid p{margin:8px 0;color:#c2c9d1;font-size:13px}
    .footer-brand>strong{color:#fff;font-size:18px}
    .footer-bottom{padding:16px 0;border-top:1px solid #ffffff22;color:#b7c0ca;font-size:12px}
    .article-page{padding:34px 0 0}
    .article-layout{display:grid;grid-template-columns:minmax(0,820px) 300px;gap:48px;align-items:start}
    .article-main{min-width:0}
    .article-crumb{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px}
    .article-crumb a{color:var(--theme)}
    .article-heading{padding:24px 0 22px;border-bottom:1px solid var(--line)}
    .article-heading h1{margin:0 0 16px;color:#202832;font-size:clamp(27px,4vw,38px);line-height:1.35}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;color:var(--muted);font-size:13px}
    .article-meta span{display:inline-flex;gap:5px}
    .article-meta strong{color:#37414d;font-weight:600}
    .article-content{min-width:0;max-width:100%;padding:26px 0;color:#39424d;font-size:16px;line-height:1.9;overflow-wrap:anywhere}
    .article-content>*{max-width:100%}
    .article-content img,.article-content video{height:auto;max-width:100%}
    .article-content table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse}
    .article-content h2,.article-content h3{margin:1.6em 0 .7em;color:#252d36;line-height:1.4}
    .article-content blockquote{margin:22px 0;padding:14px 18px;border-left:3px solid var(--accent);background:#fbf8f2;color:#535b64}
    .article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}
    .article-tags strong{margin-right:3px}
    .article-tags a{padding:5px 10px;border:1px solid var(--line);color:#525c67}
    .article-pagination{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0 38px}
    .article-pagination a{min-width:0;padding:14px;border:1px solid var(--line);background:#fff}
    .article-pagination span{display:block;color:var(--muted);font-size:12px}
    .article-pagination strong{display:block;margin-top:5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}
    .article-sidebar{position:sticky;top:20px}
    .sidebar-block{margin-bottom:22px;padding:18px;border:1px solid var(--line);background:#fff}
    .sidebar-block h2{margin:0 0 14px;font-size:16px}
    .sidebar-note{padding:14px;background:#f7f8fa;color:#58616c;font-size:13px}
    .related-list{margin:0;padding:0;list-style:none}
    .related-list li+li{border-top:1px solid var(--line)}
    .related-list a{display:block;padding:12px 0;font-size:13px;line-height:1.55}
    .related-list small{display:block;margin-top:5px;color:var(--muted);font-size:11px}
    @media(max-width:1050px){.header-inner{gap:16px}.nav-link{padding:0 8px;font-size:13px}.member-btn{display:none}.article-layout{grid-template-columns:minmax(0,1fr) 270px;gap:28px}}
    @media(max-width:800px){.container{width:min(100% - 32px,680px)}.main-nav{display:none}.header-inner{min-height:66px}.header-btns{margin-left:auto}.hamburger{display:block}.open-btn{padding:8px 11px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.article-layout{grid-template-columns:minmax(0,1fr)}.article-sidebar{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.sidebar-block{margin:0}}
    @media(max-width:520px){.container{width:calc(100% - 28px)}.topbar .container{min-height:34px}.topbar .container>span:last-child{display:flex;gap:8px}.topbar a{margin:0;font-size:11px}.topbar .container>span:first-child{font-size:11px}.logo{font-size:16px}.logo img{width:30px;height:30px}.footer-grid{grid-template-columns:1fr;gap:18px;padding:34px 0 26px}.article-page{padding-top:24px}.article-heading{padding:18px 0}.article-content{padding:20px 0;font-size:15px}.article-pagination{grid-template-columns:1fr}.article-sidebar{grid-template-columns:1fr}.footer{margin-top:48px}}