* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', Arial, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #fff;
    min-height: 100vh;
}

/* 头部样式 */
.header {
    background: rgba(20, 20, 20, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.logo {
    display: inline-block;
    padding: 15px 30px;
    background: #d32f2f;
    color: white;
    font-weight: bold;
    font-size: 16px;
}

.title {
    display: inline-block;
    padding: 15px 30px;
    font-size: 18px;
    color: #fff;
}

.nav {
    display: inline-block;
    float: right;
}

.nav-item {
    display: inline-block;
    padding: 15px 20px;
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border-bottom-color: #4CAF50;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* 页面标题 */
.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 10px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
    color: #999;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* 标签页 */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: #fff;
    border-bottom-color: #4CAF50;
}

/* 内容区域 */
.content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

/* 面板 */
.panel {
    background: rgba(30, 30, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.panel:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.panel-title {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

/* 表单 */
.form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: #ccc;
    font-size: 13px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.select {
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    color: #fff;
    font-size: 14px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #4CAF50;
    background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder {
    color: #666;
}

/* 按钮 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-success {
    background: #4CAF50;
    color: white;
}

.btn-success:hover {
    background: #45a049;
}

.btn-primary {
    background: #2196F3;
    color: white;
}

.btn-primary:hover {
    background: #1976D2;
}

.btn-warning {
    background: #FF9800;
    color: white;
}

.btn-warning:hover {
    background: #F57C00;
}

.btn-danger {
    background: #f44336;
    color: white;
}

.btn-danger:hover {
    background: #d32f2f;
}

/* 选择框 */
.select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content {
        grid-template-columns: 1fr;
    }
    
    .nav {
        display: none;
    }
    
    .page-header h1 {
        font-size: 28px;
    }
}

/* 消息提示 */
.message {
    padding: 12px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 14px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-success {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid #4CAF50;
    color: #4CAF50;
}

.message-error {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid #f44336;
    color: #f44336;
}

.message-info {
    background: rgba(33, 150, 243, 0.2);
    border: 1px solid #2196F3;
    color: #2196F3;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.table th {
    background: rgba(255, 255, 255, 0.05);
    color: #ccc;
    font-weight: 500;
    font-size: 13px;
    text-transform: uppercase;
}

.table td {
    color: #fff;
    font-size: 14px;
}

.table tr:hover {
    background: rgba(255, 255, 255, 0.03);
}