.header {
    width: 100%;
    height: 180px;
    background-color: #0168b5;
}

.copy-header {
    width: 100%;
    background-color: #0168b5;
    position: fixed;
    transform: translateY(-50px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    width: 1200px;
    margin: 0 auto;
}

.friend-link {
    height: 30px;
}

.link-container {
    height: 30px;
    width: 400px;
    float: right;
    display: flex;
}

.link-item {
    font-size: 14px;
    color: #fff;
    line-height: 30px;
    margin: 0 10px;
    position: relative;
}

.link-item:nth-child(1)::after, .link-item:nth-child(2)::after {
    content: "";
    width: 1px;
    height: 15px;
    position: absolute;
    color: #fff;
    background: #fff;
    top: 8px;
    right: -10px;
}

.logo-container-header {
    display: flex;
    align-items: center;
    height: 100px;
    justify-content: space-between;
}

.logo {
    margin-left: 28px;
    height: 100px;
    width: 400px;
    background: url("https://www.csust.edu.cn/jyjjh/images/nav/tupian.png") no-repeat;
}

.logo-font {
    height: 100px;
    width: 510px;
    background: url("https://www.csust.edu.cn/jyjjh/images/nav/logo-font.jpg") no-repeat;
}

.nav-contenxt {
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-item {
    display: block;
    cursor: pointer;
    color: #fff;
    font-size: 14px;
    height: 50px;
    line-height: 50px;
    width: 150px;
    text-align: center;
    z-index: 1000;
    position: relative;
}

.nav-item a {
    color: #fff;
font-size: 14px;
}

.nav-item:hover {
    background-color: #1e88e5;
}

.sub-container {
    visibility: hidden;
    position: absolute;
    background-color: rgba(44,102,175,.4);
    transform: scaleY(0);
    transform-origin: top;
    transition: all 0.26s ease;
    opacity: 0;
    width: 100%;
}

.nav-item:hover .sub-container{
    visibility: visible;
    opacity: 1;
    transform: scaleY(1);  
}

.sub-item {
    display: block;
    text-align: center;
}


.search {
    width: 100%;
    position: relative;
    display: flex;
    background-color: hsla(0, 0%, 100%, .15);
    border-radius: 10px;
}

.searchTerm {
    width: 100%;
    border: none;
    border-right: none;
    padding: 0 15px;
    border-radius: 5px 0 0 5px;
    outline: none;
    color: #fff;
    background: transparent;
}

.searchTerm:focus {
    color: #fff;
}

.searchButton {
    width: 40px;
    height: 36px;
    border: none;
    background: transparent;
    text-align: center;
    color: #fff;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    font-size: 20px;
}

/*调整大小查看搜索栏的变化*/
.wrap {
    width: 80%;
}


.searchTerm::placeholder {
    color: #fff;
}

.search-container {
    width: 350px;
}