.text-gray-1 {color: #757575;}
.text-gray-2 {color: #929292;}
.text-gray-3 {color: #B8B8B8;}
.text-gray-4 {color: #636363;}
.text-gray-5 {color: #4F4F4F;}
main {background-color: #F9f9f9;}
.bg-gray-default {background-color: #C4C4C4;}
.article-title::after {
    text-decoration: none;
}
.is-new-tag {
    color: #E73828;
    border: 1px solid #E73828;
    box-sizing: border-box;
    border-radius: 2px;
    padding: 0 12px;
    line-height: 1.5;
    margin-right: 10px;
    min-width: 54px;
}
.catetory-tag {
    color: #FFFFFF;
    padding: 2px 7px;
    background: rgba(231, 56, 40, 0.49);
    border-radius: 4px;
    min-width: 58px;
    min-height: 23px;
}


/* 自定义tab切换样式  begin */
.nav-tabs {border-color:  #C5C5C5;overflow: hidden;}
.nav-tabs .nav-item {padding: 13px 5px;}
.nav-tabs .nav-item:first-child {margin-left: 0px;}
.nav-item:hover {text-decoration: none;color: #E73828;font-weight: bold;}
.nav-tabs .nav-item.active {color: #E73828;font-weight: bold;border-left: none;border-right: none;border-top: none;position: relative;}
.nav-tabs .nav-item.active::after {content: '';width: 100%;height: 3px;background-color: #E73828;position: absolute;bottom: 0;left: 0;}
/* 自定义tab切换样式  end */


/* 知识社区侧边栏 begin */
.form-control.search-input {border: none;box-shadow: none;}
.form-control.search-input::placeholder {font-size: 16px;display: flex;align-items: center;color: #636363;opacity: 0.5;}
.aside_search-input-container {border: 1px solid #C0C0C0;box-sizing: border-box;border-radius: 33px;position: relative;overflow: hidden;}
.aside_search-input-container::before {content: '';width: 24px;height: 24px;background-image: url('https://images.wondershare.com/modao/assets/images-2021/website-construction/common/search-icon-1.svg');position: absolute;left: 1rem;top: 50%;transform: translateY(-50%);}
.aside_h4_text::after {content: '';width: 100%;height: 1px;background-color:  #595959;position: absolute;bottom: -1px;left: 0;}
.aside_list .aside_item {position: relative;margin: 1.5rem 0;}
.aside_list .aside_item::before {content: '';width: 4px;height: 4px;background: #E73828;border-radius: 50%;position: absolute;right: calc(100% + 1rem);top: 50%;transform: translateY(-50%);}
/* 知识社区侧边栏 begin */