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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    background: #f5f7fa;
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 24px;
    font-weight: 600;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-nickname {
    font-size: 14px;
}

.user-coins {
    font-size: 14px;
    background: rgba(255, 255, 255, 0.15);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 500;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 主内容区 */
.main-content {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.container {
    width: 100%;
}

/* 欢迎区域 */
.welcome-section {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.welcome-section h2 {
    color: #333;
    font-size: 28px;
    margin-bottom: 12px;
}

.welcome-section p {
    color: #666;
    font-size: 16px;
}

/* 模块卡片区域 */
.modules-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.module-card {
    background: white;
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 2px solid transparent;
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

.module-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.module-card h3 {
    color: #333;
    font-size: 20px;
    margin-bottom: 8px;
}

.module-card p {
    color: #666;
    font-size: 14px;
}

/* 统计概览 */
.stats-overview {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.stats-overview h3 {
    color: #333;
    font-size: 22px;
    margin-bottom: 24px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eaf6 100%);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: scale(1.05);
}

.stat-value {
    font-size: 36px;
    font-weight: 600;
    color: #667eea;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .welcome-section h2 {
        font-size: 24px;
    }

    .modules-section {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 20px 10px;
    }

    .welcome-section {
        padding: 24px 16px;
    }

    .module-card {
        padding: 24px 16px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}