.app-header {
    width: 1920px;
    height: 70px;
    position: fixed;
    top: 0;
    left: 50%;
    z-index: 9999;
    transform: translateX(-50%);
    background-color: rgba(255, 255, 255, .7);
    border-bottom: 1px solid #e6e6e6;
    transition: background-color .3s;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 1);
}

.app-header .pc-wrap {
    align-items: center;
    height: 100%;
}

.app-header .app-logo {
    width: 188px;
    height: 70px;
}

.app-header .app-logo img {
    object-fit: contain;
}

.nav-item-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    flex: 1;
    height: 40px;
}

.nav-item-wrapper > li {
    width: auto;
    position: relative;
}

.nav-item-wrapper > li > a {
    display: block;
    height: 70px;
    line-height: 70px;
    width: 86px;
    text-align: center;
    font-size: 14px;
    color: #333333;
    transition: background-color .3s;
}

.nav-item-wrapper > li:first-child a {
    width: 56px;
}

.nav-item-wrapper > li.active > a {
    color: #FFFFFF !important;
    background-color: #2667EB;
}

.nav-item-wrapper > li:hover > a {
    color: #2667EB;
}

.user-handle-module {
    height: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex-wrap: nowrap;
}

.user-handle-module .search-btn {
    display: block;
    width: 72px;
    height: 38px;
    line-height: 38px;
    text-align: center;
    background-color: #2667eb;
    border-radius: 8px;
    font-size: 14px;
    color: #ffffff;
}

.user-handle-module .search-btn:hover {
    background-color: #135bec;
}

.submenu-list {
    position: absolute;
    top: 71px;
    left: 0;
    z-index: 99;
    display: none;
    box-shadow: 0 0 6px rgba(0, 0, 0, .05);
}

.nav-item-wrapper > li:hover .submenu-list {
    display: block;
}