:root{
  --bg:#fafbfc; --card:#fff; --border:#e5e7eb; --text:#1f2937; --muted:#6b7280;
  --primary:#ef4444; --primary-d:#dc2626; --accent:#3b82f6; --tag-bg:#fef3c7; --tag-tx:#92400e;
  --code-bg:#1e1e2e; --code-tx:#cdd6f4;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* Header */
.sticky-top{position:sticky;top:0;z-index:100}
.header{background:#fff;border-bottom:1px solid var(--border);padding:16px 24px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.header-inner{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.logo{font-size:20px;font-weight:700;display:flex;align-items:center;gap:8px}
.logo .badge{background:var(--primary);color:#fff;font-size:11px;padding:2px 8px;border-radius:10px;font-weight:600}
.stats{display:flex;gap:16px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.stats b{color:var(--text)}
.stats .stat-tut{color:#10b981}
.stats .stat-ski{color:#8b5cf6}
.stats .stat-ppt{color:#f59e0b}

/* Tabs */
.tabs{display:flex;gap:4px;background:#fff;border-bottom:1px solid var(--border);padding:0 24px}
.tabs-inner{max-width:1400px;margin:0 auto;display:flex;gap:4px;width:100%}
.tab{padding:14px 20px;font-size:14px;color:var(--muted);border-bottom:2px solid transparent;transition:all .15s}
.tab:hover{color:var(--text)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.tab .count{background:#f3f4f6;padding:1px 7px;border-radius:10px;font-size:11px;margin-left:4px}
.tab.active .count{background:var(--primary);color:#fff}

/* Container */
.container{max-width:1400px;margin:0 auto;padding:24px}
.view{display:none}
.view.active{display:block}

/* Filter bar */
.filter-bar{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap;align-items:center}
.filter-btn{padding:6px 14px;border-radius:20px;background:#fff;border:1px solid var(--border);font-size:13px;color:var(--muted)}
.filter-btn.active{background:var(--text);color:#fff;border-color:var(--text)}
.search{flex:1;min-width:200px;padding:8px 14px;border:1px solid var(--border);border-radius:20px;font-size:14px;min-width:200px}

/* Post grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.post-card{background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;cursor:pointer;transition:all .2s}
.post-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.post-card .thumb{width:100%;aspect-ratio:3/4;background:#f3f4f6;overflow:hidden;position:relative}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.post-card .thumb-fallback{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:32px}
.post-card .track-tag{position:absolute;top:8px;left:8px;padding:3px 8px;border-radius:4px;font-size:11px;color:#fff;font-weight:600}
.track-tutorial .track-tag{background:#10b981}
.track-skill .track-tag{background:#8b5cf6}
.track-ppt .track-tag{background:#f59e0b}
.post-card .body{padding:12px}
.post-card .title{font-size:14px;font-weight:600;line-height:1.4;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.post-card .meta{display:flex;gap:8px;margin-top:8px;font-size:11px;color:var(--muted);flex-wrap:wrap}
.post-card .meta .chip{background:#f3f4f6;padding:2px 6px;border-radius:4px}
.post-card .badges{position:absolute;top:8px;right:8px;display:flex;gap:4px}
.post-card .badge-ico{background:rgba(0,0,0,.6);color:#fff;border-radius:4px;padding:2px 6px;font-size:10px}

/* Detail */
.detail-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:1000;display:none;overflow-y:auto}
.detail-overlay.show{display:block}
.detail-modal{max-width:900px;margin:40px auto;background:#fff;border-radius:12px;overflow:hidden}
.detail-header{padding:20px 24px;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:1}
.detail-close{float:right;font-size:24px;color:var(--muted);line-height:1}
.detail-title{font-size:20px;font-weight:700;line-height:1.3;margin-right:30px}
.detail-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.detail-tags .tag{background:var(--tag-bg);color:var(--tag-tx);padding:3px 10px;border-radius:12px;font-size:12px}
.detail-body{padding:24px}
.detail-section{margin-bottom:28px}
.detail-section h3{font-size:15px;font-weight:600;margin-bottom:12px;color:var(--text);padding-bottom:6px;border-bottom:1px solid var(--border)}
.detail-body-text{white-space:pre-wrap;font-size:14px;line-height:1.8;color:#374151}
.detail-images{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.detail-images img{width:100%;border-radius:8px;cursor:pointer}
.detail-images .img-wrap{position:relative}
.detail-images .img-label{position:absolute;bottom:4px;left:4px;background:rgba(0,0,0,.6);color:#fff;font-size:11px;padding:2px 6px;border-radius:4px}
.code-block{background:var(--code-bg);color:var(--code-tx);padding:16px;border-radius:8px;overflow-x:auto;font-family:"SF Mono",Consolas,monospace;font-size:12.5px;line-height:1.6;max-height:500px;overflow-y:auto;white-space:pre}
.code-block .lang{color:#a6accd;float:right;font-size:11px}
.demo-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.demo-box{background:#f9fafb;border:1px solid var(--border);border-radius:8px;padding:12px;font-size:13px}
.demo-box h4{font-size:12px;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}
.slide-list{display:flex;flex-direction:column;gap:8px}
.slide-item{background:#f9fafb;border-left:3px solid var(--accent);padding:10px 14px;border-radius:4px}
.slide-item .slide-title{font-weight:600;font-size:14px}
.slide-item .slide-bullets{margin-top:6px;font-size:12px;color:#4b5563;padding-left:16px}
.slide-item .slide-bullets li{margin-bottom:2px}
.md-download{display:inline-block;background:#f59e0b;color:#fff;padding:8px 16px;border-radius:6px;font-size:13px;font-weight:600;margin-bottom:12px}
.md-download:hover{text-decoration:none;background:#d97706}
.md-actions{display:flex;gap:8px;margin-bottom:14px}
.md-toggle{padding:8px 14px;border-radius:6px;font-size:13px;border:1px solid var(--border);color:var(--muted);background:#fff}
.md-toggle.active{background:var(--text);color:#fff;border-color:var(--text)}

/* Markdown 文档渲染 */
.md-doc{background:#fff;border:1px solid var(--border);border-radius:10px;padding:28px 32px;font-size:14.5px;line-height:1.85;color:#2b2f38}
.md-doc h1{font-size:23px;font-weight:800;margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid #f59e0b;color:#111827}
.md-doc h2{font-size:17.5px;font-weight:700;margin:26px 0 10px;padding:8px 12px;background:linear-gradient(90deg,#fff7ed,#fff);border-left:4px solid #f59e0b;border-radius:0 6px 6px 0;color:#92400e}
.md-doc h3{font-size:15px;font-weight:700;margin:16px 0 6px;color:#374151}
.md-doc p{margin:8px 0}
.md-doc ul,.md-doc ol{margin:8px 0;padding-left:24px}
.md-doc li{margin:4px 0}
.md-doc li>ul,.md-doc li>ol{margin:4px 0}
.md-doc blockquote{margin:12px 0;padding:10px 16px;background:#fefce8;border-left:4px solid #eab308;border-radius:0 6px 6px 0;color:#713f12;font-size:13.5px}
.md-doc blockquote p{margin:3px 0}
.md-doc hr{border:none;border-top:1px dashed #d1d5db;margin:20px 0}
.md-doc strong{color:#111827;font-weight:700}
.md-doc code{background:#f3f4f6;padding:1px 6px;border-radius:4px;font-family:"SF Mono",Consolas,monospace;font-size:12.5px;color:#be185d}
.md-doc a{color:#2563eb}
.md-raw{background:var(--code-bg);color:var(--code-tx);padding:20px;border-radius:8px;font-family:"SF Mono",Consolas,monospace;font-size:12.5px;line-height:1.7;white-space:pre-wrap;word-break:break-word;max-height:600px;overflow-y:auto;margin:0}

/* Flow view */
.flow-container{background:#fff;border-radius:12px;padding:32px;border:1px solid var(--border)}
.flow-step{display:grid;grid-template-columns:80px 1fr;gap:24px;padding:20px 0;border-bottom:1px dashed var(--border);position:relative}
.flow-step:last-child{border-bottom:none}
.flow-num{font-size:48px;font-weight:800;color:var(--primary);opacity:.15;text-align:center;line-height:1}
.flow-step-content h3{font-size:18px;font-weight:700;margin-bottom:6px}
.flow-step-content .script{font-family:monospace;background:#f3f4f6;padding:2px 8px;border-radius:4px;font-size:12px;color:var(--accent)}
.flow-step-content .meta-row{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin:8px 0}
.flow-step-content .meta-row b{color:var(--text)}
.flow-step-content .stats-row{display:flex;gap:12px;margin:10px 0}
.flow-step-content .stat-pill{background:#eff6ff;color:#1e40af;padding:4px 12px;border-radius:12px;font-size:12px}
.flow-step-content .purpose{font-size:14px;color:#4b5563;line-height:1.6}
.flow-arrow{text-align:center;color:var(--muted);font-size:20px;margin:-8px 0}

/* Code 弹窗 */
.code-overlay{display:none;position:fixed;inset:0;z-index:1500;background:rgba(0,0,0,.55);backdrop-filter:blur(3px)}
.code-overlay.show{display:flex;align-items:center;justify-content:center;padding:20px}
.code-modal{background:var(--code-bg);border-radius:14px;width:100%;max-width:960px;max-height:88vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.4)}
.code-modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:#181825;border-bottom:1px solid #313244}
.code-modal-title{color:#a6accd;font-size:14px;font-weight:600}
.code-modal-actions{display:flex;align-items:center;gap:12px}
.code-copy-btn{background:var(--primary);color:#fff;border:none;padding:6px 14px;border-radius:18px;font-size:12px;cursor:pointer;font-weight:600}
.code-copy-btn:hover{opacity:.85}
.code-copy-btn.copied{background:#46b981}
.code-close{color:#6c7086;font-size:24px;cursor:pointer;line-height:1}
.code-close:hover{color:#fff}
.code-modal-body{display:flex;flex:1;overflow:hidden}
.code-sidebar{width:220px;flex-shrink:0;background:#181825;padding:8px 0;overflow-y:auto}
.code-sidebar::-webkit-scrollbar{width:6px}
.code-sidebar::-webkit-scrollbar-thumb{background:#313244;border-radius:3px}
.script-item{padding:9px 14px;cursor:pointer;font-family:monospace;font-size:12px;color:#a6accd;border-left:3px solid transparent;word-break:break-all}
.script-item:hover{background:#211f2b}
.script-item.active{background:#211f2b;border-left-color:var(--primary);color:#fff}
.script-item .size{font-size:10px;color:#6c7086;float:right;margin-left:4px}
.code-main{flex:1;display:flex;flex-direction:column;overflow:hidden}
.code-file-bar{padding:10px 16px;background:#181825;border-bottom:1px solid #313244;font-family:monospace;font-size:12px;color:#a6accd;flex-shrink:0}
.code-scroll{flex:1;overflow:auto;background:var(--code-bg)}
.code-scroll::-webkit-scrollbar{width:8px;height:8px}
.code-scroll::-webkit-scrollbar-thumb{background:#313244;border-radius:4px}
.code-table{width:100%;border-collapse:collapse;font-family:"SF Mono",Consolas,monospace;font-size:12.5px}
.code-table tr{line-height:1.6}
.code-table td:first-child{width:42px;min-width:42px;text-align:right;padding:0 10px 0 12px;color:#54515e;user-select:none;white-space:nowrap;vertical-align:top}
.code-table td:last-child{padding:0 16px 0 8px;color:var(--code-tx);white-space:pre;tab-size:4}

.empty{padding:60px 20px;text-align:center;color:var(--muted)}

@media(max-width:768px){
  .stats{display:none}
  .tabs-inner{overflow-x:auto}
  .code-sidebar{width:160px}
  .code-modal{max-width:100%;max-height:92vh}
}