styles/_anchor.scss

%header-anchor-link {
    position: relative;
    display: inline-block;
    top: 1px;
    padding: 5px 8px 0;
    text-decoration: none;

    &:after {
        position: absolute;
        display: none;
        bottom: 50%;
        margin-top: -8px;
        opacity: 0.5;
        width: 16px;
        height: 16px;
        background-image: url('data:image/png;base64,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');
        background-repeat: no-repeat;
        content: '';
    }
}