/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* 主内容区域 */
.main-content {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    min-height: 500px;
}

/* 功能卡片网格 */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}

.card-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.card h3 {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: #2c3e50;
}

.card p {
    color: #7f8c8d;
    margin-bottom: 20px;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    min-width: 100px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(86, 171, 47, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, #3498db 0%, #74b9ff 100%);
    color: white;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f39c12 0%, #fdcb6e 100%);
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #95a5a6 0%, #bdc3c7 100%);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(149, 165, 166, 0.4);
}

/* 区域样式 */
.section {
    animation: fadeIn 0.5s ease-in;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #ecf0f1;
}

.section-header h2 {
    color: #2c3e50;
    font-size: 1.8em;
}

/* 表单样式 */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #7f8c8d;
    font-size: 0.9em;
}

.checkbox-label {
    display: inline-flex !important;
    align-items: center;
    margin-right: 20px;
    margin-bottom: 10px;
    font-weight: normal !important;
}

.checkbox-label input[type="checkbox"] {
    width: auto !important;
    margin-right: 8px;
}

.form-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 25px;
}

/* 结果显示区域 */
.result {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    display: none;
}

.result.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.result.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.result.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.result.loading {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* 数据列表样式 */
.data-list {
    margin-top: 25px;
}

.data-item {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.data-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.data-item h4 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.data-item-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.data-item-stats {
    display: flex;
    gap: 20px;
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9em;
    color: #7f8c8d;
}

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

/* 进度条样式 */
.progress-container {
    margin-top: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #ecf0f1;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.progress-text {
    margin-top: 10px;
    text-align: center;
    font-size: 0.9em;
    color: #7f8c8d;
}

/* 状态指示器 */
.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
}

.status-success { background-color: #27ae60; }
.status-error { background-color: #e74c3c; }
.status-warning { background-color: #f39c12; }
.status-info { background-color: #3498db; }

/* 底部样式 */
.footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: white;
    opacity: 0.8;
}

/* 工具提示 */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #2c3e50;
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9em;
    white-space: nowrap;
    z-index: 1000;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .data-item-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .data-item-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8em;
    }
    
    .card {
        padding: 20px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9em;
    }
}

/* 加载动画 */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

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

/* 文本对齐工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* 间距工具类 */
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }

/* 显示/隐藏工具类 */
.hidden { display: none !important; }
.visible { display: block !important; }