body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Arial', sans-serif;
}

/* 导航栏样式 - 支持深色主题 */
.navbar.navbar-dark {
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.navbar.navbar-dark .navbar-brand,
.navbar.navbar-dark .navbar-nav .nav-link,
.navbar.navbar-dark .navbar-text {
    color: white !important;
    font-weight: 600 !important;
    text-shadow: none !important;
}

.navbar.navbar-dark .navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
    background-color: rgba(255, 255, 255, 0.1) !important;
    border-radius: 5px;
}

.navbar.navbar-dark .navbar-nav .nav-link.active {
    color: white !important;
    font-weight: bold !important;
    background-color: rgba(255, 255, 255, 0.15) !important;
    border-radius: 5px;
}

/* 深色导航栏汉堡菜单样式 */
.navbar.navbar-dark .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.3) !important;
}

.navbar.navbar-dark .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

.analytics-header {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 3rem 0;
    text-align: center;
    margin-bottom: 2rem;
    margin-top: 20px;
    border-radius: 0 0 30px 30px;
}

.analytics-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.analytics-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.insight-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

/* 确保insight-card内部所有文字都是白色 */
.insight-card * {
    color: white !important;
}

.insight-card .text-muted {
    color: rgba(255, 255, 255, 0.8) !important;
}

.insight-card small {
    color: rgba(255, 255, 255, 0.9) !important;
}

.metric-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.metric-card:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.metric-value {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.metric-label {
    color: #6c757d;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.progress-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.recommendation-card {
    border-left: 4px solid;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 0 15px 15px 0;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

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

.recommendation-urgent { border-left-color: #dc3545; }
.recommendation-high { border-left-color: #fd7e14; }
.recommendation-medium { border-left-color: #ffc107; }
.recommendation-low { border-left-color: #28a745; }

.prediction-card {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #333;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
}

.chart-container {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin: 1rem 0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.insight-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0.25rem;
}

.insight-excellent { background: #d4edda; color: #155724; }
.insight-good { background: #d1ecf1; color: #0c5460; }
.insight-average { background: #fff3cd; color: #856404; }
.insight-poor { background: #f8d7da; color: #721c24; }

.trend-indicator {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: bold;
    margin: 0.5rem;
}

.trend-improving { background: #d4edda; color: #155724; }
.trend-stable { background: #d1ecf1; color: #0c5460; }
.trend-declining { background: #f8d7da; color: #721c24; }

.btn-analytics {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-analytics:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    color: white;
}

.section-title {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    font-weight: bold;
    color: #333;
}

.section-title i {
    margin-right: 0.5rem;
    color: #667eea;
}