:root{--primary: #4e6ef2;--primary-hover: #3a56d4;--bg: #f5f6f9;--white: #ffffff;--text: #222;--text-secondary: #666;--text-light: #999;--border: #e8e8e8;--danger: #ff4757;--success: #2ed573;--shadow: 0 2px 8px rgba(0,0,0,.08);--radius: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1100px;margin:0 auto;padding:0 16px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border:none;border-radius:var(--radius);font-size:14px;cursor:pointer;transition:all .2s;font-family:inherit}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-outline{background:transparent;color:var(--primary);border:1px solid var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}.btn-sm{padding:4px 12px;font-size:13px}.btn-lg{padding:12px 28px;font-size:16px}.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:14px}.form-input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;transition:border-color .2s}.form-input:focus{outline:none;border-color:var(--primary)}textarea.form-input{min-height:120px;resize:vertical}.avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}.avatar-lg{width:64px;height:64px;font-size:24px}.avatar-sm{width:32px;height:32px;font-size:13px}.navbar{background:var(--white);box-shadow:var(--shadow);position:sticky;top:0;z-index:100}.navbar .container{display:flex;align-items:center;height:56px;gap:24px}.navbar .logo{font-size:22px;font-weight:700;color:var(--primary);text-decoration:none;flex-shrink:0}.navbar .search-box{flex:1;max-width:400px;position:relative}.navbar .search-box input{width:100%;padding:8px 16px;border:2px solid var(--border);border-radius:20px;font-size:14px;font-family:inherit}.navbar .search-box input:focus{outline:none;border-color:var(--primary)}.navbar .nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}.navbar .nav-link{color:var(--text-secondary);font-size:14px;cursor:pointer;position:relative}.navbar .nav-link:hover{color:var(--primary);text-decoration:none}.badge{position:absolute;top:-6px;right:-10px;background:var(--danger);color:#fff;font-size:11px;padding:1px 5px;border-radius:10px;min-width:16px;text-align:center}.post-card{display:flex;gap:16px;padding:16px 20px;border-bottom:1px solid var(--border);transition:background .15s}.post-card:last-child{border-bottom:none}.post-card:hover{background:#fafbfc}.post-card .post-main{flex:1;min-width:0}.post-card .post-title{font-size:16px;font-weight:600;color:var(--text);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.post-card .post-title:hover{color:var(--primary)}.post-card .post-preview{font-size:13px;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px}.post-meta{display:flex;align-items:center;gap:16px;font-size:12px;color:var(--text-light)}.post-stats{display:flex;flex-direction:column;align-items:center;padding:8px 16px;background:#f0f2f5;border-radius:var(--radius);font-size:13px;color:var(--text-secondary);min-width:60px}.post-stats .count{font-size:18px;font-weight:600;color:var(--text)}.post-detail .post-header{margin-bottom:20px}.post-detail .post-header h1{font-size:24px;margin-bottom:12px}.post-detail .post-author{display:flex;align-items:center;gap:12px;margin-bottom:20px}.post-detail .post-content{font-size:15px;line-height:1.8;white-space:pre-wrap;margin-bottom:20px}.post-detail .post-images{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px;margin-bottom:20px}.post-detail .post-images img{width:100%;border-radius:var(--radius);cursor:pointer}.post-actions{display:flex;gap:16px;padding:12px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:24px}.post-action-btn{display:flex;align-items:center;gap:4px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:14px;padding:6px 12px;border-radius:var(--radius);transition:all .2s;font-family:inherit}.post-action-btn:hover{background:#f0f2f5}.post-action-btn.active{color:var(--primary)}.comment-item{padding:16px 0;border-bottom:1px solid var(--border)}.comment-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.comment-author{font-weight:500;font-size:14px}.comment-time{font-size:12px;color:var(--text-light)}.comment-content{font-size:14px;margin-left:50px;margin-bottom:8px}.reply-item{margin-left:50px;padding:10px 0;border-bottom:1px solid #f0f0f0;font-size:14px}.reply-form{margin-left:50px;margin-top:8px}.reply-form input{width:100%;padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:inherit}.page-layout{display:grid;grid-template-columns:1fr 300px;gap:20px;padding:20px 0}.sidebar-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}.sidebar-card h3{font-size:15px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}.sidebar-item{padding:8px 0;display:flex;align-items:center;justify-content:space-between;font-size:14px}.auth-page{min-height:calc(100vh - 56px);display:flex;align-items:center;justify-content:center;padding:40px 16px}.auth-card{width:100%;max-width:400px;background:var(--white);border-radius:12px;box-shadow:var(--shadow);padding:40px}.auth-card h2{text-align:center;margin-bottom:24px;color:var(--primary)}.tag{display:inline-block;padding:2px 10px;background:#f0f2f5;border-radius:12px;font-size:12px;color:var(--text-secondary)}.tag-active{background:var(--primary);color:#fff}.pagination{display:flex;justify-content:center;gap:8px;padding:20px 0}.pagination button{padding:6px 14px;border:1px solid var(--border);background:var(--white);border-radius:var(--radius);cursor:pointer;font-size:14px}.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.pagination button:disabled{opacity:.5;cursor:default}.admin-layout{display:grid;grid-template-columns:200px 1fr;gap:20px;padding:20px 0}.admin-nav a{display:block;padding:10px 16px;color:var(--text-secondary);border-radius:var(--radius);margin-bottom:4px}.admin-nav a.active,.admin-nav a:hover{background:var(--primary);color:#fff;text-decoration:none}.stat-card{text-align:center;padding:24px}.stat-card .stat-number{font-size:32px;font-weight:700;color:var(--primary)}.stat-card .stat-label{font-size:14px;color:var(--text-secondary);margin-top:4px}.notif-item{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.notif-item.unread{background:#f0f4ff;margin:0 -16px;padding:12px 16px;border-radius:var(--radius)}.notif-text{flex:1;font-size:14px}.notif-text strong{color:var(--text)}.notif-time{font-size:12px;color:var(--text-light);margin-top:4px}@media (max-width: 768px){.page-layout,.admin-layout{grid-template-columns:1fr}.navbar .search-box{display:none}.post-card{flex-direction:column}.post-stats{flex-direction:row;gap:8px}}