/* 给导航栏设置背景颜色 */
.navbar {
    display: flex;
    justify-content: center;
}

/* 给导航栏中的链接设置颜色 */
.navbar a {
    color: #f2f2f2;
    padding: 14px 16px;
    text-decoration: none;
    border-radius: 4px;
    border: 1px solid transparent;
}

/* 鼠标移动到链接上时的效果 */
.navbar a:hover {
    background-color: #ddd;
    color: black;
}

/* 选中的标签的样式 */
.navbar a.active {
    background-color: #f3c120;
    color: white;
}


.card-cover {
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
}

ul {
    display: flex;
    justify-content: center;
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.nav-pills li a {
    color: black;
}

.nav-pills li a:hover {
    color: #ecb204;
}