body {
    font-family: 'Microsoft YaHei', sans-serif;
    padding-top: 56px;
}

.carousel-item {
    height: 500px;
    background-color: #777;
}

.carousel-item img {
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    background-color: rgba(0,0,0,0.6);
    padding: 20px;
    border-radius: 5px;
    bottom: 100px;
}

@media (max-width: 768px) {
    .carousel-item {
        height: 300px;
    }
    
    .carousel-caption {
        bottom: 20px;
    }
}

.card {
    transition: all 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}


/* 返回顶部按钮样式 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #007bff;
    color: white;
    text-align: center;
    line-height: 50px;
    cursor: pointer;
    z-index: 999;
}

/* 导航栏滚动效果 */
.navbar-scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}