:root{--bg: #f5f7fa;--surface: #ffffff;--surface-2: #f0f2f5;--border: #e3e7ee;--text: #1f2733;--text-2: #5b6572;--text-3: #8b95a3;--primary: #3b82f6;--primary-hover: #2f6fe0;--primary-soft: #e8f0fe;--danger: #ef4444;--danger-soft: #fee2e2;--warn: #f59e0b;--ok: #10b981;--radius: 10px;--shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);--shadow-lg: 0 10px 30px rgba(16, 24, 40, .12);--maxw: 1080px}@media (prefers-color-scheme: dark){:root{--bg: #0e1116;--surface: #161b22;--surface-2: #1c222b;--border: #262d38;--text: #e6edf3;--text-2: #9aa5b1;--text-3: #6b7684;--primary: #4f8ef7;--primary-hover: #6ba1f9;--primary-soft: #1d2b45;--danger-soft: #3a1d1d;--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .5)}}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100%}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit;font-size:15px;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 12px;outline:none;transition:border-color .15s,box-shadow .15s;width:100%}input:focus,textarea:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}textarea{resize:vertical;min-height:120px}.app{min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}.topbar{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--border)}.topbar-inner{display:flex;align-items:center;gap:16px;height:60px}.brand{font-size:18px;font-weight:700;display:flex;align-items:center;gap:8px;white-space:nowrap}.brand .logo{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,#3b82f6,#6366f1);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:15px}.nav-search{flex:1;max-width:420px;position:relative}.nav-search input{padding-left:34px}.nav-search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--text-3)}.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}.nav-links a,.nav-links button{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:8px;border:none;background:transparent;color:var(--text-2);font-size:14px;white-space:nowrap}.nav-links a:hover,.nav-links button:hover{background:var(--surface-2);color:var(--text)}.avatar{width:26px;height:26px;border-radius:50%;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;overflow:hidden;flex-shrink:0}.avatar img{width:100%;height:100%;object-fit:cover}.main{flex:1;padding:24px 0 60px}.page{display:flex;gap:24px;align-items:flex-start}.sidebar{width:180px;flex-shrink:0;position:sticky;top:84px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px}.sidebar a{display:block;padding:9px 12px;border-radius:8px;color:var(--text-2);font-size:14px;margin-bottom:2px}.sidebar a:hover{background:var(--surface-2);color:var(--text)}.sidebar a.active{background:var(--primary-soft);color:var(--primary);font-weight:600}.content{flex:1;min-width:0}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}.card+.card{margin-top:12px}.post-card{display:block;transition:border-color .15s,box-shadow .15s}.post-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg)}.post-card .title-row{display:flex;align-items:center;gap:8px}.post-card h3{margin:0;font-size:16px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.post-card .excerpt{margin:8px 0 12px;color:var(--text-2);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.post-meta{display:flex;align-items:center;gap:14px;color:var(--text-3);font-size:13px;flex-wrap:wrap}.post-meta .item{display:inline-flex;align-items:center;gap:4px}.badge{display:inline-flex;align-items:center;padding:1px 8px;border-radius:6px;font-size:12px;font-weight:500;background:var(--surface-2);color:var(--text-2);white-space:nowrap}.badge.pin{background:var(--danger-soft);color:var(--danger)}.badge.board,.badge.role{background:var(--primary-soft);color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:500;transition:background .15s,opacity .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--border)}.btn-ghost:hover{background:var(--surface-2)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:5px 10px;font-size:13px}.form{max-width:420px;margin:0 auto}.form h2{margin:0 0 4px}.form .sub{color:var(--text-3);font-size:14px;margin:0 0 24px}.form .field{margin-bottom:16px}.form label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px}.error{background:var(--danger-soft);color:var(--danger);border-radius:8px;padding:10px 14px;font-size:14px;margin-bottom:16px}.post-detail h1{margin:4px 0 12px;font-size:24px;line-height:1.35}.post-body{white-space:pre-wrap;word-break:break-word;font-size:15px;line-height:1.75;margin:20px 0}.actions-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.like-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-2)}.like-btn.liked{color:var(--primary);border-color:var(--primary);background:var(--primary-soft)}.comment{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--border)}.comment:last-child{border-bottom:none}.comment .body{flex:1;min-width:0}.comment .author{font-weight:600;font-size:14px}.comment .time{color:var(--text-3);font-size:12px;margin-left:8px}.comment .text{margin:4px 0 8px;word-break:break-word}.comment .foot{display:flex;align-items:center;gap:12px;color:var(--text-3);font-size:13px}.pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:20px}.empty{text-align:center;color:var(--text-3);padding:60px 20px}.empty .big{font-size:40px;margin-bottom:8px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}th{color:var(--text-3);font-weight:500;font-size:13px}.markdown-body{word-break:break-word;line-height:1.7}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin:1em 0 .5em;line-height:1.3}.markdown-body p{margin:.5em 0}.markdown-body ul,.markdown-body ol{padding-left:1.5em;margin:.5em 0}.markdown-body code{background:var(--surface-2);padding:1px 6px;border-radius:5px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em}.markdown-body pre{background:var(--surface-2);padding:12px 14px;border-radius:8px;overflow-x:auto}.markdown-body pre code{background:none;padding:0}.markdown-body blockquote{margin:.5em 0;padding:2px 14px;border-left:3px solid var(--primary);color:var(--text-2);background:var(--surface-2);border-radius:0 6px 6px 0}.markdown-body a{color:var(--primary)}.markdown-body table{border:1px solid var(--border);border-radius:8px;overflow:hidden}.markdown-body img{max-width:100%;border-radius:8px}.tag{display:inline-flex;align-items:center;padding:1px 8px;border-radius:6px;font-size:12px;background:var(--surface-2);color:var(--text-2);cursor:pointer;border:1px solid transparent}.tag:hover{border-color:var(--primary);color:var(--primary)}.notif-bell{position:relative}.notif-badge{position:absolute;top:2px;right:2px;min-width:16px;height:16px;border-radius:8px;background:var(--danger);color:#fff;font-size:11px;line-height:16px;text-align:center;padding:0 4px}.notif-dropdown{position:absolute;right:0;top:46px;width:340px;max-height:420px;overflow-y:auto;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-lg);z-index:200}.notif-item{display:flex;gap:8px;padding:10px 14px;border-bottom:1px solid var(--border);font-size:13px}.notif-item:last-child{border-bottom:none}.notif-item.unread{background:var(--primary-soft)}@media (max-width: 760px){.page{flex-direction:column}.sidebar{width:100%;position:static;display:flex;overflow-x:auto}.sidebar a{white-space:nowrap}.nav-links .hide-sm{display:none}}