*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--text:#172033;--muted:#667085;--border:#e5e7eb;--light:#f8fafc;--white:#fff;--code:#111827}
html{scroll-behavior:smooth}
body{font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#f6f8fb;line-height:1.7}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,calc(100% - 32px));margin:auto}
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{font-size:22px;font-weight:800;white-space:nowrap}.logo span{color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:5px}
.main-nav>a,.drop-btn{border:0;background:transparent;padding:10px 11px;color:#344054;font:inherit;cursor:pointer;border-radius:7px}
.main-nav>a:hover,.drop-btn:hover{background:#eff6ff;color:var(--primary)}
.dropdown{position:relative}.dropdown-menu{display:none;position:absolute;top:calc(100% + 4px);left:0;width:215px;padding:8px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 12px 35px rgba(15,23,42,.12)}
.dropdown:hover .dropdown-menu{display:block}.dropdown-menu a{display:block;padding:9px 11px;border-radius:7px;color:#475467}.dropdown-menu a:hover{background:#eff6ff;color:var(--primary)}
.menu-toggle{display:none;border:0;background:transparent;font-size:25px;cursor:pointer}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start;padding:42px 0 60px}
.article-content,.sidebar-box{background:#fff;border:1px solid var(--border);border-radius:12px}
.article-content{padding:42px}
.breadcrumb{display:flex;gap:8px;color:var(--muted);font-size:14px;margin-bottom:25px}.breadcrumb a{color:var(--primary)}
.article-category{display:inline-block;background:#eff6ff;color:var(--primary);font-size:13px;font-weight:700;padding:5px 11px;border-radius:999px;margin-bottom:13px}
.article-header h1{font-size:clamp(32px,4vw,48px);line-height:1.15;letter-spacing:-1px;margin-bottom:18px}
.article-intro{font-size:18px;color:var(--muted);max-width:760px}
.article-meta{display:flex;gap:10px;flex-wrap:wrap;color:#667085;font-size:14px;margin-top:18px}
.article-content>p{color:#344054;font-size:17px;margin:22px 0}
.article-content h2{font-size:27px;line-height:1.3;margin:40px 0 14px}
.article-content pre{overflow-x:auto;background:var(--code);color:#e5e7eb;padding:20px;border-radius:9px;margin:18px 0 25px;font-size:14px;line-height:1.6}
.article-content code{font-family:Consolas,Monaco,monospace}
.tip-box{background:#f0fdf4;border-left:4px solid #16a34a;padding:15px 18px;margin:22px 0;color:#166534}
.article-ad,.sidebar-ad{min-height:90px;border:1px dashed #cbd5e1;background:#fafafa;display:flex;justify-content:center;align-items:center;color:#98a2b3;font-size:11px;letter-spacing:1px}
.article-ad{margin:30px 0}
.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:35px;padding-top:25px;border-top:1px solid var(--border)}
.article-tags a{background:#f2f4f7;color:#475467;padding:6px 11px;border-radius:6px;font-size:13px}
.article-tags a:hover{background:#eff6ff;color:var(--primary)}
.share-box{margin-top:30px;padding:20px;background:var(--light);border-radius:10px;display:flex;align-items:center;justify-content:space-between;gap:15px}
.share-buttons{display:flex;gap:8px}.share-buttons button,.share-buttons a{border:1px solid var(--border);background:#fff;padding:7px 13px;border-radius:6px;cursor:pointer;font:inherit}.share-buttons button:hover,.share-buttons a:hover{color:var(--primary);border-color:#bfdbfe}
.sidebar{position:sticky;top:95px}.sidebar-box{padding:21px;margin-bottom:20px}.sidebar-box h3{font-size:18px;margin-bottom:15px}
.sidebar-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.sidebar-heading a{font-size:12px;color:var(--primary);font-weight:700;white-space:nowrap}
.search-box form{display:flex;gap:7px}.search-box input{min-width:0;flex:1;border:1px solid var(--border);border-radius:7px;padding:10px;outline:none}.search-box input:focus{border-color:#93c5fd}.search-box button{border:0;background:var(--primary);color:#fff;border-radius:7px;padding:0 13px;cursor:pointer}.search-box button:hover{background:var(--primary-dark)}
.blog-list{list-style:none}.blog-list li{border-bottom:1px solid #eef0f3}.blog-list li:last-child{border-bottom:0}.blog-list a{display:block;padding:11px 0;color:#475467;font-size:14px;line-height:1.45}.blog-list a:hover,.blog-list a.active{color:var(--primary)}
.category-list{display:flex;flex-wrap:wrap;gap:8px}.category-list a{background:#f2f4f7;color:#475467;padding:6px 10px;border-radius:6px;font-size:13px}.category-list a:hover{background:#eff6ff;color:var(--primary)}
.sidebar-ad{min-height:250px}
.site-footer{background:#101828;color:#d0d5dd;padding-top:45px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:35px}.footer-logo{color:#fff;font-size:21px;font-weight:800;margin-bottom:10px}.footer-grid p{color:#98a2b3;max-width:400px}.footer-grid h4{color:#fff;margin-bottom:12px}.footer-grid a{display:block;color:#98a2b3;margin:7px 0;font-size:14px}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid #344054;text-align:center;padding:18px;color:#98a2b3;font-size:13px}
@media(max-width:900px){.main-nav{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 15px 35px rgba(15,23,42,.12);padding:10px;flex-direction:column;align-items:stretch}.main-nav.show{display:flex}.main-nav>a,.drop-btn{width:100%;text-align:left}.dropdown-menu{position:static;display:block;width:auto;border:0;box-shadow:none;padding:0 0 5px 15px}.menu-toggle{display:block}.article-layout{grid-template-columns:1fr}.sidebar{position:static;order:2}.article-content{order:1}}
@media(max-width:600px){.container{width:min(100% - 22px,1180px)}.article-layout{padding:25px 0 40px;gap:20px}.article-content{padding:24px 18px}.article-header h1{font-size:32px}.article-intro{font-size:16px}.article-content h2{font-size:23px;margin-top:32px}.article-content>p{font-size:16px}.share-box{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr;gap:25px}}