body {
    font-family: 'Arial', sans-serif;
    background-color: #f8f9fa;
}
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.card {
    border: none;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.carousel-item img {
    height: 400px;
    object-fit: cover;
}
video {
    max-height: 400px;
}

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

/* 导航栏增强 */
.navbar {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

/* 容器背景 */
.container {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* 卡片增强 */
.card {
    border: none;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* 按钮增强 */
.btn-primary {
    background: linear-gradient(45deg, #007bff, #0056b3);
    border: none;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #004085);
    transform: scale(1.05);
}

/* 页脚增强 */
footer {
    background: linear-gradient(135deg, #333, #555);
    color: white;
}

.navbar-nav .nav-link {
    color: #800080 !important; /* 紫色 */
}
.navbar-brand {
    color: #800080 !important; /* 紫色 */
    font-weight: bold;
    font-size: 1.5rem;
}