.nav-bar {
    display: flex;
    gap: 10px;
}

.navbar_item {
    position: relative;
    padding: 16px;
    font-size: 18px;
    cursor: pointer;
    color: #737373;
    white-space: nowrap;
}
.navbar_item.active {
    font-weight: bold;
    color: #171717;
}
.navbar_item:hover::after{
    transform: scaleX(1)
}  
.navbar_item::after {
    content: "";
    position: absolute;
    bottom: 0px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #CB0F22;
    transform: scaleX(0);
    /* 设置过渡效果 */
    transition: .3s
}
.active::after {
    transform: scaleX(1)
}

/* 手机 */
@media screen and (max-width:576px) {
    .nav-bar {
        overflow-y: scroll;
    }

    .navbar_item {
        padding: 12px;
        font-size: 14px;
    }
}

/* ipad */
@media screen and (max-width:1000px) {
    .navbar_item {
        font-size: 16px;
    }
}