/* 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* 登录界面样式 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    padding: 40px;
    animation: fadeIn 0.5s ease;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: #4a6ee0;
    font-size: 28px;
    margin-bottom: 10px;
}

.login-header p {
    opacity: 0.9;
    font-size: 1.1em;
}

/* 登录表单样式 */
.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 14px;
}

.login-form input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: #4a6ee0;
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.1);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #4a6ee0 0%, #3a5ed0 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 110, 224, 0.3);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.login-error {
    background: #fee;
    color: #e74c3c;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    border: 1px solid #fcc;
    display: none;
}

/* 主应用容器 */
.app-container {
    display: none;
}

.app-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 24px;
    color: #4a6ee0;
}

.logo h1 {
    font-size: 20px;
    color: #333;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #4a6ee0, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.logout-btn {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    color: #666;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.logout-btn:hover {
    background: #e9ecef;
    color: #333;
}

.main-content {
    max-width: 1400px;
    margin: 30px auto;
    padding: 0 20px;
}

/* 标签页样式 */
.tabs-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    overflow: hidden;
}

.tabs-header {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    padding: 0 20px;
    overflow-x: auto;
}

.tab-btn {
    padding: 15px 25px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 15px;
    font-weight: 500;
    color: #6c757d;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn:hover {
    color: #495057;
    background: #e9ecef;
}

.tab-btn.active {
    color: #4a6ee0;
    border-bottom-color: #4a6ee0;
    background: white;
}

.tab-content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 25px;
    margin-bottom: 25px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f2f5;
}

.card-header h2 {
    color: #333;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-actions {
    display: flex;
    gap: 10px;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: #4a6ee0;
    color: white;
}

.btn-primary:hover {
    background: #3a5ed0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 110, 224, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-info:hover {
    background: #138496;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #495057;
    font-size: 14px;
}

.form-label.required::after {
    content: " *";
    color: #e74c3c;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s;
    background: #f8f9fa;
}

.form-control:focus {
    outline: none;
    border-color: #4a6ee0;
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.1);
    background: white;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    margin-top: 20px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 1000px;
}

.data-table thead {
    background: #f8f9fa;
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #495057;
    border-bottom: 2px solid #dee2e6;
    white-space: nowrap;
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #dee2e6;
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* 搜索和过滤 */
.search-container {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
}

.search-input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 14px;
}

.filter-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.filter-select {
    padding: 10px 15px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    background: white;
    font-size: 14px;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
    padding: 20px;
}

.page-btn {
    padding: 8px 15px;
    border: 1px solid #dee2e6;
    background: white;
    color: #495057;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.page-btn:hover:not(:disabled) {
    background: #f8f9fa;
}

.page-btn.active {
    background: #4a6ee0;
    color: white;
    border-color: #4a6ee0;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: white;
    border-radius: 10px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown 0.3s ease;
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: #333;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #6c757d;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.modal-close:hover {
    background: #f8f9fa;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 20px 25px;
    border-top: 1px solid #e9ecef;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 加载状态 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #4a6ee0;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    backdrop-filter: blur(3px);
}

.loading-overlay.active {
    display: flex;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #4a6ee0;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-left: 4px solid #4a6ee0;
}

.stat-card h3 {
    color: #6c757d;
    font-size: 14px;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-card .value {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.stat-card .trend {
    font-size: 14px;
    color: #28a745;
    display: flex;
    align-items: center;
    gap: 5px;
}

.stat-card .trend.down {
    color: #dc3545;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 20px;
    color: #dee2e6;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #495057;
}

.empty-state p {
    margin-bottom: 20px;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-content {
        padding: 0 15px;
        margin: 20px auto;
    }
    
    .tabs-header {
        padding: 0 10px;
    }
    
    .tab-btn {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .tab-content {
        padding: 20px 15px;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        padding: 0 15px;
    }
    
    .logo h1 {
        font-size: 18px;
    }
    
    .login-box {
        padding: 30px 20px;
    }
}