themes/docsy/assets/scss/_nav.scss

//
// Main navbar
//
$primary: #fff;
.td-navbar-cover {
    background: $primary;
    &.navbar-bg-onscroll .nav-link {
        text-shadow: none;
    }
}

.td-navbar {
    background: $primary;
    min-height: 4rem;
    margin: 0;
    z-index: 199;
    display: flex;
    justify-content: space-between;
    .navbar-nav-wrapper{
        .nav-item {
            &:last-child{
                .nav-link {
                    &::before{
                        content:'CN';
                        background: #F8F9FA;
                        border-radius: 8px;
                        display: inline-block;
                        padding: 1px 3px;
                        margin-right: 4px;
                    }
                }
            }
        }
    }

    @include media-breakpoint-up(md) {
        position: fixed;
        top: 0;
        width: 100%;
    }
    .navbar-brand {
        text-transform: none;
        .nav-link {
            display: inline-block;
            margin-right: -30px;
        }
        svg {
            display: inline-block;
            margin: 0 10px;
        }
        img {
            display: inline-block;
            margin: 0 10px;
        }

    }
    .nav-link {
        text-transform: none;
        font-weight: $font-weight-bold;
        color: $fontColor;
    }
    .td-search-input {
        border: none;
        @include placeholder {
            color: $navbar-dark-color;
        }
    }
    .search-input-box {
        width: 250px;
        .link {
            height: 36px;
            line-height: 36px;
            padding-left: 16px;
            float: right;
            .link-name {
                color: #909094;
            }
        }
    }

    .dropdown {
        &:hover {
            .dropdown-menu {
                visibility: visible;
                opacity: 1;
                transform: scaleX(1);
            }
        }
        &-menu {
            box-shadow: 0px 3px 9px 0px rgba(0, 0, 0, 0.12);
            padding: 15px;
            border: 0;
            left: -225px;
            top: 36px;
            border-radius: 0;
            display: block;
            visibility: hidden;
            transition: .3s ease;
            opacity: 0;
            transform: scale(.8);
            background: white;
            &:hover {
                color: blue;
                background: white;
            }
            &:focus {
                color: blue;
            }
        }
        &.blog {
            .dropdown-menu {
                left: 0;
            }
        }
    }
    @include media-breakpoint-down(md) {
        padding-right: .5rem;
        padding-left: .75rem;
        .td-navbar-nav-scroll {
            max-width: 100%;
            height: 2.5rem;
            font-size: .875rem;
            .nav-link {
                padding-right: .25rem;
                padding-left: 0;
            }
            .navbar-nav {
                white-space: nowrap;
                -webkit-overflow-scrolling: touch;
            }
        }
    }
}

@supports (backdrop-filter:none) or (-webkit-backdrop-filter:none) {
    .td-navbar {
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(15px);
        background: hsla(0, 0%, 100%, .8);
    }
}