/* 一下均为自增加样式 */
.navbar-navigation-root-link {
    min-width: 70px;
}

.up-nav {
    position: absolute;
    top: 0px;
    right: 160px;
    min-width: 350px;
    height: 20px;
}

.up-ul {
    display: flex;
}

.up-ul li {
    padding: 0 10px;
    min-width: 60px;
    text-align: center;
}

.up-ul li a {
    min-width: 60px;
    font-size: 12px;
    color: #fff;
    font-weight: normal;

}

.up-ul li a:hover {
    color: rgba(255, 255, 255, 0.6);
}

.mask {
    width: 100%;
    height: 65%;
    z-index: 2;
    position: absolute;
    background: linear-gradient(to bottom, #103d9f, rgba(255, 255, 255, 0));
    top: 0;
    left: 0;
}

.dropdown {
    position: relative;
    background-image: linear-gradient(#fff, #fff);
    background-position: center 90%;
    background-size: 0 2px;
    background-repeat: no-repeat;
    transition: .3s;
}

.dropdown:hover {
    background-size: 100% 2px;
}

.dropdown-content {
    position: absolute;
    /* background-color: #f9f9f9; */
    background-color: #2B3033;
    opacity: 0.9;
    min-width: 118px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
    top: 55px;
    left: 0px;
    /* 让盒子先沿着y轴缩放到0 也就是隐藏了 */
    transform: scaleY(0);
    /* 我们需要将盒子从上面滑动下来 设置一下缩放的中心点即可 设置到最上面的中间位置 */
    transform-origin: 50% 0;
    /* 设置过渡 */
    transition: all 0.3s;
}

.dropdown-content a {
    color: #fff;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: center;
}

.dropdown-content a:hover {
    background-color: #a0a0a0
        /* background-color: #f1f1f1 */
}

.dropdown:hover .dropdown-content {
    transform: scaleY(1);
}

.big-title {
    position: relative;
    z-index: 3;
}