:root{--bg-primary:#ffffff;--bg-secondary:#f9fafb;--bg-tertiary:#f3f4f6;--bg-hover:#f3f4f6;--bg-active:#eff6ff;--bg-code:#f8fafc;--text-primary:#111827;--text-secondary:#4b5563;--text-tertiary:#9ca3af;--text-inverse:#ffffff;--border-primary:#e5e7eb;--border-secondary:#f3f4f6;--border-focus:#3b82f6;--accent:#3b82f6;--accent-hover:#2563eb;--accent-light:#eff6ff;--accent-border:#bfdbfe;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--shadow-xs:0 1px 2px 0 rgba(0, 0, 0, 0.05);--shadow-sm:0 1px 3px 0 rgba(0, 0, 0, 0.1),0 1px 2px -1px rgba(0, 0, 0, 0.1);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.1),0 2px 4px -2px rgba(0, 0, 0, 0.1);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.1),0 4px 6px -4px rgba(0, 0, 0, 0.1);--radius-sm:6px;--radius:8px;--radius-md:10px;--radius-lg:12px;--header-h:64px;--sidebar-w:280px;--toc-w:240px;--content-max:800px;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--font-mono:"SF Mono",Monaco,"Cascadia Code","Roboto Mono",Consolas,"Courier New",monospace;--transition:all 0.2s cubic-bezier(0.4, 0, 0.2, 1)}
[data-theme=dark]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-hover:#334155;--bg-active:#1e3a8a;--bg-code:#1e293b;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-tertiary:#64748b;--text-inverse:#0f172a;--border-primary:#334155;--border-secondary:#1e293b;--border-focus:#3b82f6;--accent:#3b82f6;--accent-hover:#60a5fa;--accent-light:#1e3a8a;--accent-border:#1e40af;--shadow-xs:0 1px 2px 0 rgba(0, 0, 0, 0.3);--shadow-sm:0 1px 3px 0 rgba(0, 0, 0, 0.4),0 1px 2px -1px rgba(0, 0, 0, 0.4);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.5),0 2px 4px -2px rgba(0, 0, 0, 0.4);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.6),0 4px 6px -4px rgba(0, 0, 0, 0.5)}
*,::after,::before{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:15px;line-height:1.6;color:var(--text-primary);background:var(--bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s ease,color .3s ease}
[tabindex],a,button,input{outline:0;-webkit-tap-highlight-color:transparent}
[tabindex]:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:0 0}
::selection{background:var(--accent-light);color:var(--accent)}
.doc-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:var(--bg-primary);border-bottom:1px solid var(--border-primary);z-index:100;transition:var(--transition)}
.header-left{display:flex;align-items:center;gap:16px;min-width:0}
.menu-toggle{display:none;width:40px;height:40px;border-radius:var(--radius);align-items:center;justify-content:center;color:var(--text-secondary);transition:var(--transition)}
.menu-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}
.menu-toggle svg{width:22px;height:22px}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;font-size:18px;color:var(--text-primary);letter-spacing:-.02em}
.logo-mark{width:32px;height:32px;border-radius:var(--radius);background:linear-gradient(135deg,var(--accent) 0,#8b5cf6 100%);display:flex;align-items:center;justify-content:center;color:var(--text-inverse);flex-shrink:0;box-shadow:var(--shadow-sm)}
.logo-mark svg{width:18px;height:18px}
.header-right{display:flex;align-items:center;gap:8px}
.header-link{padding:8px 16px;font-size:14px;font-weight:500;color:var(--text-secondary);border-radius:var(--radius);transition:var(--transition)}
.header-link:hover{background:var(--bg-hover);color:var(--text-primary)}
.header-link.active{background:var(--accent-light);color:var(--accent)}
.theme-toggle{width:40px;height:40px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:var(--transition)}
.theme-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}
.theme-toggle svg{width:20px;height:20px}
.doc-layout{display:flex;padding-top:var(--header-h);min-height:100vh}
.doc-sidebar{position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--sidebar-w);background:var(--bg-primary);border-right:1px solid var(--border-primary);display:flex;flex-direction:column;z-index:90;transition:var(--transition)}
.sidebar-search{padding:20px;border-bottom:1px solid var(--border-primary)}
.search-box{position:relative;display:flex;align-items:center;gap:8px}
.search-box svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--text-tertiary);pointer-events:none;transition:var(--transition)}
.search-input{width:100%;height:44px;padding:0 16px 0 40px;font-size:14px;color:var(--text-primary);background:var(--bg-secondary);border:2px solid var(--border-primary);border-radius:var(--radius);transition:var(--transition)}
.search-input::placeholder{color:var(--text-tertiary)}
.search-input:focus{outline:0;background:var(--bg-primary);border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}
.search-input:focus+svg{color:var(--accent)}
.search-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--accent);border-radius:var(--radius-sm);color:var(--text-inverse);transition:var(--transition)}
.search-btn:hover{background:var(--accent-hover)}
.search-btn svg{width:16px;height:16px;position:static;transform:none}
.search-input{padding-right:48px}
.cate-filter{margin-top:16px}
.cate-filter-list{display:flex;flex-wrap:wrap;gap:8px;padding:0 20px 20px 20px;border-bottom:1px solid var(--border-primary)}
.cate-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:500;color:var(--text-secondary);background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius);transition:var(--transition);cursor:pointer}
.cate-tag:hover{background:var(--bg-hover);border-color:var(--accent);color:var(--accent)}
.cate-tag.active{background:var(--accent);border-color:var(--accent);color:var(--text-inverse)}
.cate-count{font-size:11px;font-weight:600;padding:1px 6px;background:rgba(255,255,255,.2);border-radius:10px}
.cate-tag:not(.active) .cate-count{background:var(--bg-tertiary);color:var(--text-tertiary)}
.cate-more{display:flex;align-items:center;gap:4px;margin-top:12px;padding:6px 12px;font-size:13px;font-weight:500;color:var(--accent);background:0 0;border:1px dashed var(--border-primary);border-radius:var(--radius);transition:var(--transition);cursor:pointer}
.cate-more:hover{background:var(--accent-light);border-color:var(--accent)}
.cate-more svg{width:14px;height:14px;transition:transform .2s}
.cate-more.expanded svg{transform:rotate(180deg)}
.sidebar-nav{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:8px 12px}
.sidebar-nav::-webkit-scrollbar{width:6px}
.sidebar-nav::-webkit-scrollbar-track{background:0 0}
.sidebar-nav::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:3px}
.sidebar-nav::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}
.sidebar-group{margin-bottom:8px}
.group-label{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;font-size:13px;font-weight:600;color:var(--text-secondary);text-align:left;user-select:none}
.group-label .group-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.group-label .group-count{font-size:12px;font-weight:600;color:var(--text-tertiary);background:var(--bg-tertiary);padding:2px 8px;border-radius:10px;margin-left:auto}
.group-list{overflow:hidden}
.group-item{display:block;padding:10px 12px 10px 24px;margin:2px 0;font-size:14px;color:var(--text-secondary);border-radius:var(--radius);border-left:3px solid transparent;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:var(--transition);cursor:pointer}
.group-item:hover{background:var(--bg-hover);color:var(--text-primary)}
.group-item.active{color:var(--accent);background:var(--accent-light);font-weight:600}
.search-empty,.sidebar-empty{display:none;padding:40px 20px;text-align:center;font-size:14px;color:var(--text-tertiary)}
.doc-main{flex:1;margin-left:var(--sidebar-w);margin-right:var(--toc-w);min-width:0;display:flex;justify-content:center}
.doc-content{width:100%;max-width:var(--content-max);padding:48px 48px 80px}
.doc-breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-tertiary);margin-bottom:24px}
.doc-breadcrumb .sep{color:var(--border-primary)}
.doc-breadcrumb a{color:var(--accent);transition:var(--transition)}
.doc-breadcrumb a:hover{text-decoration:underline}
.doc-title{font-size:36px;font-weight:700;line-height:1.2;letter-spacing:-.02em;margin-bottom:20px;color:var(--text-primary)}
.doc-meta{display:flex;flex-wrap:wrap;align-items:center;gap:20px;padding-bottom:28px;margin-bottom:36px;border-bottom:1px solid var(--border-primary);font-size:14px;color:var(--text-tertiary)}
.doc-meta-item{display:flex;align-items:center;gap:8px}
.doc-meta-item svg{width:16px;height:16px}
.doc-body{font-size:16px;color:var(--text-primary);word-wrap:break-word;line-height:1.75}
.doc-body>:first-child{margin-top:0}
.doc-body h1,.doc-body h2,.doc-body h3,.doc-body h4,.doc-body h5,.doc-body h6{line-height:1.35;font-weight:600;scroll-margin-top:calc(var(--header-h) + 24px);position:relative;color:var(--text-primary)}
.doc-body h1{font-size:28px;margin:48px 0 20px}
.doc-body h2{font-size:24px;margin:40px 0 18px;padding-bottom:12px;border-bottom:1px solid var(--border-primary)}
.doc-body h3{font-size:20px;margin:32px 0 16px}
.doc-body h4{font-size:18px;margin:28px 0 14px}
.doc-body .heading-anchor{position:absolute;left:-28px;top:50%;transform:translateY(-50%);opacity:0;color:var(--text-tertiary);font-weight:400;font-size:.9em;transition:var(--transition);padding:2px 6px;border-radius:var(--radius-sm)}
.doc-body h1:hover .heading-anchor,.doc-body h2:hover .heading-anchor,.doc-body h3:hover .heading-anchor,.doc-body h4:hover .heading-anchor{opacity:1}
.doc-body .heading-anchor:hover{color:var(--accent);background:var(--accent-light)}
.doc-body p{margin:18px 0}
.doc-body a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;transition:var(--transition)}
.doc-body a:hover{border-bottom-color:var(--accent)}
.doc-body ol,.doc-body ul{margin:18px 0;padding-left:32px}
.doc-body li{margin:8px 0}
.doc-body li>ol,.doc-body li>ul{margin:8px 0}
.doc-body blockquote{margin:24px 0;padding:20px 24px;border-left:4px solid var(--accent);background:var(--accent-light);border-radius:0 var(--radius) var(--radius) 0;color:var(--text-secondary)}
.doc-body blockquote p{margin:8px 0}
.doc-body :not(pre)>code{font-family:var(--font-mono);font-size:.875em;padding:3px 8px;background:var(--bg-code);border:1px solid var(--border-primary);border-radius:var(--radius-sm);color:var(--danger)}
.doc-body .code-block{position:relative;margin:28px 0;border:1px solid var(--border-primary);border-radius:var(--radius);overflow:hidden;background:var(--bg-code);box-shadow:var(--shadow-sm)}
.doc-body .code-block .code-lang{position:absolute;top:0;left:0;padding:6px 16px;font-size:12px;font-family:var(--font-mono);color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.05em;background:#f3f4f6;border-right:1px solid #e5e7eb;border-bottom:1px solid #e5e7eb;border-bottom-right-radius:var(--radius-sm)}
.doc-body .code-block .copy-btn{position:absolute;top:12px;right:12px;display:flex;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:500;color:var(--text-secondary);background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius);transition:var(--transition);z-index:2}
.doc-body .code-block .copy-btn:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-light)}
.doc-body .code-block .copy-btn.copied{color:var(--success);border-color:var(--success)}
.doc-body .code-block .copy-btn svg{width:14px;height:14px}
.doc-body pre{margin:0;padding:48px 20px 20px;overflow-x:auto;font-family:var(--font-mono);font-size:14px;line-height:1.7;background-color:#f8fafc}
.doc-body pre code{font-family:var(--font-mono);background:0 0;padding:0;border:none}
.doc-body pre::-webkit-scrollbar{height:8px}
.doc-body pre::-webkit-scrollbar-track{background:var(--bg-tertiary)}
.doc-body pre::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:4px}
.doc-body .table-wrap{overflow-x:auto;margin:28px 0}
.doc-body table{width:100%;border-collapse:collapse;font-size:14px;border:1px solid var(--border-primary);border-radius:var(--radius);overflow:hidden}
.doc-body td,.doc-body th{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border-primary);border-right:1px solid var(--border-primary)}
.doc-body td:last-child,.doc-body th:last-child{border-right:none}
.doc-body tr:last-child td{border-bottom:none}
.doc-body th{background:var(--bg-tertiary);font-weight:600;color:var(--text-primary)}
.doc-body tbody tr:hover{background:var(--bg-hover)}
.doc-body img{max-width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--border-primary);margin:24px 0;box-shadow:var(--shadow-sm)}
.doc-body hr{border:none;border-top:1px solid var(--border-primary);margin:48px 0}
.doc-empty-tip{color:var(--text-tertiary);padding:32px 0}
.doc-toc{position:fixed;top:calc(var(--header-h) + 48px);right:0;width:var(--toc-w);padding:0 24px;max-height:calc(100vh - var(--header-h) - 96px);overflow-y:auto}
.doc-toc::-webkit-scrollbar{width:4px}
.doc-toc::-webkit-scrollbar-thumb{background:var(--border-primary)}
.toc-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-tertiary);margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border-primary)}
.toc-list{list-style:none}
.toc-list li{margin:2px 0}
.toc-link{display:block;padding:8px 12px;font-size:13px;line-height:1.5;color:var(--text-secondary);border-left:3px solid transparent;border-radius:0 var(--radius) var(--radius) 0;transition:var(--transition);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer}
.toc-link.level-3{padding-left:28px;font-size:12.5px}
.toc-link:hover{color:var(--text-primary);background:var(--bg-hover)}
.toc-link.active{color:var(--accent);border-left-color:var(--accent);background:var(--accent-light);font-weight:600}
.toc-empty{font-size:13px;color:var(--text-tertiary);padding:16px 12px}
.doc-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:120px 0;gap:24px}
.spinner{width:44px;height:44px;border:3px solid var(--border-primary);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}
}
.doc-loading p{color:var(--text-tertiary);font-size:15px}
.doc-state{text-align:center;padding:100px 20px}
.doc-state .state-icon{width:72px;height:72px;margin:0 auto 24px;color:var(--text-tertiary)}
.doc-state h2{font-size:24px;margin-bottom:12px;color:var(--text-primary)}
.doc-state p{color:var(--text-tertiary);font-size:16px}
.doc-state .retry-btn{margin-top:28px;padding:12px 28px;font-size:15px;font-weight:600;color:var(--text-inverse);background:var(--accent);border-radius:var(--radius);transition:var(--transition)}
.doc-state .retry-btn:hover{background:var(--accent-hover);box-shadow:var(--shadow-md)}
.fade-in{animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}
to{opacity:1;transform:none}
}
.sidebar-mask{display:none;position:fixed;inset:var(--header-h) 0 0 0;background:rgba(0,0,0,.4);z-index:89;opacity:0;transition:opacity .2s}
.sidebar-mask.show{display:block;opacity:1}
@media (max-width:1200px){.doc-toc{display:none}
.doc-main{margin-right:0}
}
@media (max-width:900px){:root{--content-max:100%}
.menu-toggle{display:flex}
.doc-main{margin-left:0}
.doc-content{padding:32px 24px 64px}
.doc-sidebar{transform:translateX(-100%);transition:transform .25s ease;box-shadow:var(--shadow-lg);width:min(320px,85vw)}
.doc-sidebar.open{transform:translateX(0)}
.doc-title{font-size:28px}
.header-link.hide-sm{display:none}
}
@media (max-width:480px){.doc-header{padding:0 16px}
.doc-content{padding:24px 16px 56px}
.doc-title{font-size:24px}
.doc-body{font-size:15px}
.doc-body h1{font-size:24px}
.doc-body h2{font-size:20px}
}
.search-box .search-cate-filter{position:absolute;right:8px;top:50%;transform:translateY(-50%);z-index:1}
.search-box .search-cate-filter select{height:32px;padding:0 12px;font-size:13px;border:1px solid var(--border-primary);border-radius:var(--radius);background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;outline:0;transition:var(--transition)}
.search-box .search-cate-filter select:focus{border-color:var(--accent)}
.sidebar-empty strong{color:var(--accent)}
.search-highlight{background:#fef3c7;color:#92400e;padding:0 3px;border-radius:3px;font-weight:500}
[data-theme=dark] .search-highlight{background:#78350f;color:#fef3c7}