:root {
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --bg-page: #f5f7fa;
    --bg-sidebar: #1e1f2c;
    --bg-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-light: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.2s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg-page); color: var(--text-primary); line-height: 1.5; -webkit-font-smoothing: antialiased; }
.app-layout { display: flex; min-height: 100vh; }

/* ========== 左侧菜单栏优化 ========== */
/* 宽度从 280px 改为 240px */
.sidebar { 
    width: 240px; 
    background: var(--bg-sidebar); 
    color: #e2e8f0; 
    display: flex; 
    flex-direction: column; 
    transition: var(--transition); 
    position: fixed; 
    left: 0; 
    top: 0; 
    bottom: 0; 
    z-index: 100; 
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}
.sidebar.collapsed { width: 80px; }

/* 头部区域压缩 */
.sidebar-header { 
    padding: 20px 16px; 
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.logo-full { display: flex; align-items: center; gap: 10px; }
.logo-full i { font-size: 24px; color: var(--primary); }
.logo-full span { font-size: 18px; font-weight: 700; letter-spacing: -0.5px; color: white; }
.logo-mini { display: none; justify-content: center; }
.logo-mini i { font-size: 24px; color: var(--primary); }
.collapsed .logo-full { display: none; }
.collapsed .logo-mini { display: flex; }

/* 导航菜单项间距减小 */
.sidebar-nav { 
    flex: 1; 
    padding: 16px 12px; 
    display: flex; 
    flex-direction: column; 
    gap: 4px; 
}
.nav-item { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    padding: 10px 12px; 
    color: #9ca3af; 
    text-decoration: none; 
    border-radius: 10px; 
    transition: var(--transition); 
    white-space: nowrap; 
}
.nav-item i { width: 20px; font-size: 18px; text-align: center; }
.nav-item:hover { background: rgba(255, 255, 255, 0.05); color: white; }
.nav-item.active { background: rgba(59, 130, 246, 0.15); color: var(--primary-light); }
.nav-item.active i { color: var(--primary); }
.collapsed .nav-item span { display: none; }
.collapsed .nav-item { justify-content: center; padding: 10px; }

/* 底部用户区域压缩 */
.sidebar-footer { padding: 16px 12px; border-top: 1px solid rgba(255, 255, 255, 0.06); }
.user-info-full { display: flex; flex-direction: column; gap: 2px; }
.user-name { color: white; font-weight: 500; font-size: 14px; }
.user-role { font-size: 11px; color: #6b7280; }
.user-info-mini { display: none; justify-content: center; font-size: 20px; }
.collapsed .user-info-full { display: none; }
.collapsed .user-info-mini { display: flex; }

/* 主内容区域左边距相应调整 */
.main-content { 
    flex: 1; 
    margin-left: 240px; 
    transition: var(--transition); 
    min-height: 100vh; 
    display: flex; 
    flex-direction: column; 
}
.sidebar.collapsed + .main-content { margin-left: 80px; }

/* ========== 以下为原始样式（未修改） ========== */
.top-bar { 
    height: 70px; 
    background: white; 
    border-bottom: 1px solid var(--border-light); 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 0 24px; 
    position: sticky; 
    top: 0; 
    z-index: 50; 
    backdrop-filter: blur(8px); 
    background: rgba(255, 255, 255, 0.8); 
}
.top-bar-left { display: flex; align-items: center; gap: 20px; }
.toggle-sidebar { 
    background: none; 
    border: none; 
    font-size: 22px; 
    color: var(--text-secondary); 
    cursor: pointer; 
    width: 40px; 
    height: 40px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    border-radius: 12px; 
    transition: var(--transition); 
}
.toggle-sidebar:hover { background: var(--bg-page); color: var(--text-primary); }
.page-title { font-size: 20px; font-weight: 600; color: var(--text-primary); }
.top-bar-right { display: flex; align-items: center; gap: 20px; }
.header-actions { display: flex; gap: 8px; }
.icon-btn { 
    background: none; 
    border: none; 
    width: 40px; 
    height: 40px; 
    border-radius: 12px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 18px; 
    color: var(--text-secondary); 
    cursor: pointer; 
    transition: var(--transition); 
}
.icon-btn:hover { background: var(--bg-page); color: var(--text-primary); }
.user-dropdown { display: flex; align-items: center; gap: 12px; }
.user-avatar { width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: flex; align-items: center; justify-content: center; color: white; font-weight: 600; font-size: 16px; text-transform: uppercase; }
.logout-link { color: var(--text-secondary); font-size: 18px; transition: var(--transition); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 12px; }
.logout-link:hover { background: #fee2e2; color: #ef4444; }
.content-wrapper { padding: 24px; flex: 1; }
.card { background: var(--bg-card); border-radius: var(--radius-xl); box-shadow: var(--shadow-md); padding: 24px; border: 1px solid rgba(0, 0, 0, 0.02); }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.card-header h2 { font-size: 18px; font-weight: 600; color: var(--text-primary); }
.filter-bar { background: white; border-radius: var(--radius-lg); padding: 20px; margin-bottom: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); }
.filter-form { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; }
.filter-group { display: flex; flex-direction: column; gap: 6px; }
.filter-group label { font-size: 13px; font-weight: 500; color: var(--text-secondary); }
.filter-control { padding: 10px 14px; border: 1px solid var(--border-light); border-radius: 10px; font-size: 14px; min-width: 160px; background: white; transition: var(--transition); font-family: inherit; }
.filter-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1); }
.btn { padding: 10px 20px; border-radius: 10px; font-weight: 500; font-size: 14px; border: none; cursor: pointer; transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; background: white; border: 1px solid var(--border-light); color: var(--text-primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: #ef4444; border-color: #ef4444; color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.table-responsive { overflow-x: auto; border-radius: var(--radius-lg); }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 1200px; }
.data-table th { text-align: left; padding: 14px 16px; background: #f9fafb; font-weight: 600; color: var(--text-secondary); border-bottom: 1px solid var(--border-light); white-space: nowrap; }
.data-table td { padding: 16px; border-bottom: 1px solid var(--border-light); color: var(--text-primary); }
.data-table tbody tr { transition: var(--transition); }
.data-table tbody tr:hover { background: #fafbfc; }
.badge { padding: 4px 10px; border-radius: 30px; font-size: 12px; font-weight: 500; }
.badge-success { background: #dcfce7; color: #166534; }
.link-url { max-width: 250px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--primary); text-decoration: none; }
.link-url:hover { text-decoration: underline; }
.pagination { display: flex; justify-content: space-between; align-items: center; margin-top: 24px; }
.pagination-controls { display: flex; align-items: center; gap: 8px; }
.page-size-select { padding: 8px 12px; border: 1px solid var(--border-light); border-radius: 10px; background: white; }
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 1000; opacity: 0; visibility: hidden; transition: var(--transition); }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: white; border-radius: var(--radius-xl); width: 480px; max-width: 90%; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-lg); transform: scale(0.95); transition: var(--transition); }
.modal-overlay.active .modal { transform: scale(1); }
.modal-header { padding: 20px 24px; border-bottom: 1px solid var(--border-light); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { font-size: 18px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-secondary); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border-light); display: flex; justify-content: flex-end; gap: 12px; }
.form-row { margin-bottom: 20px; }
.form-label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 14px; }
.form-label.required::after { content: " *"; color: #ef4444; }
.form-input { width: 100%; padding: 12px 14px; border: 1px solid var(--border-light); border-radius: 12px; font-size: 14px; transition: var(--transition); font-family: inherit; }
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1); }
.form-hint { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
@media (max-width: 768px) {
    .sidebar { width: 80px; }
    .sidebar .logo-full, .sidebar .nav-item span, .sidebar .user-info-full { display: none; }
    .sidebar .logo-mini, .sidebar .user-info-mini { display: flex; }
    .main-content { margin-left: 80px; }
    .filter-form { flex-direction: column; align-items: stretch; }
    .filter-control { width: 100%; }
}