.header {
    width: 100%;
    height: 64px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    background: #E2E9FF;
    transition: background-color .2s linear;
}

.header.shadow {
    background: #ffffff;
}

.header .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 1200px;
    margin: 0 auto;
    height: 100%;
}

.header .logo {
    height: 36px;
}

.header .navs {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
}

.header .nav-item {
    cursor: pointer;
    height: 100%;
    text-align: center;
    font-weight: 400;
    font-size: 16px;
    box-sizing: border-box;
}

.header .nav-item a {
    display: block;
    height: 100%;
    width: 100%;
    line-height: 64px;
    color: #1F1F1F;
    padding: 0 30px;
    box-sizing: border-box;
}

.header .nav-item a:hover {
    color: #6759FF;
}

.header .nav-item.active a {
    color: #6759FF;
    position: relative;
}
.header .nav-item.active a:before {
    content: "";
    display: block;
    height: 2px;
    background-color: #6759FF;
    position: absolute;
    bottom: 0;
    left: 16px;
    right: 16px;
}


.header .nav-item:last-child{
    margin-right: 0;
}


/* 头部导航 - 下拉菜单 */
.header-navs-dropdown {
    position: fixed;
    width: 100%;
    height: 520px;
    left: 0;
    box-shadow: 0 10px 50px 0 rgba(48, 48, 48, 0.1);
    background: linear-gradient( 180deg, #FCFCFC 0%, #FFFFFF 100%);
    z-index: 100;
    opacity: 1;
    top: 64px;
    overflow: hidden;
    display: none;
}

.header-navs-dropdown .custom-scrollbar {
    overflow-y: scroll;
}

.header-navs-dropdown.ing .custom-scrollbar::-webkit-scrollbar-thumb {
     background: linear-gradient( 180deg, #FCFCFC 0%, #FFFFFF 100%) !important;
 }

.header-navs-dropdown a.active {
    color: #6759FF !important;
}

.header-navs-dropdown * {
    box-sizing: border-box;
}

/* 头部导航栅格 */
.header-navs-dropdown .dropdown-grid {
    height: calc(100% - 32px);
    margin-top: 16px;
    display: flex;
    gap: 90px;
    justify-content: center;
    padding: 16px;
    overflow-y: scroll;
    overflow-x: hidden;
}
.header-navs-dropdown .dropdown-grid-col {
    padding-top: 8px;
    padding-bottom: 20px;
    padding-right: 8px;
    height: 100%;
    min-width: 254px;
}
.dropdown-grid-col-title {
    padding: 14px 4px;
    font-weight: bold;
    font-size: 18px;
    color: #1F1F1F;
    display: flex;
    justify-content: flex-start;
    align-content: center;
    border-bottom: 1px solid #F6F5FF;
    margin-bottom: 20px;
}
.dropdown-grid-col-title img {
    margin-right: 10px;
    width: 18px;
    height: 18px;
}

/* 折叠面板 */
.dropdown-grid-col .sub-title {
    cursor: pointer;
    font-size: 16px;
    color: #1F1F1F;
    display: flex;
    justify-content: space-between;
    align-items: center;
    line-height: 32px;
}
.dropdown-grid-col .sub-title .down-icon {
    width: 16px;
    height: 16px;
    margin-left: 32px;
    transition: .28s;
    transform: rotate(180deg);
}

.dropdown-grid-col .nLi.on-ing .down-icon,
.dropdown-grid-col .nLi.on .down-icon {
    transform: rotate(0deg);
}

.dropdown-grid-col .nLi + .nLi {
    margin-top: 8px;
}

.dropdown-grid-col ul .nLi .sub {
    display: none;
}

.dropdown-grid-col ul .nLi.on .sub {
    display: block;
}

.dropdown-grid-col .nLi .sub li {
    line-height: 32px;
}

.dropdown-grid-col ul .nLi .sub li a {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
    padding: 0 25px;
    font-size: 16px;
    color: #82878F;
}

.dropdown-grid-col ul .nLi .sub li a:hover,
.dropdown-grid-col .nLi a:hover {
    color: #6759ff;
}