.top-search {
    margin-top: 0;
    height: 100px;
    background-color: white;
    border-bottom: 1px solid rgb(240,240,240);
}

.help-center-title {
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 0;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
}

.top-search-box {
    position: absolute;
    top: 50%;
    left: 308px;
    transform: translate(0, -50%);
    width: 592px;
    height: 48px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
}

.top-input-box {
    display: flex;
    align-items: center;
    position: relative;
    flex: auto;
}

.clear-input {
    right: 16px;
    cursor: pointer;
    background-image: url(/images/support/service/clear-input.svg);
    width: 16px;
    height: 16px;
    background-repeat: no-repeat;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    display: none;
}
.top-input-search-img {
    opacity: .25;
    left: 16px;
    background-image: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTYiIGhlaWdodD0iMTYiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiPjxkZWZzPjxwYXRoIGQ9Ik04LjEyMyAxMS44MTRhNS41IDUuNSAwIDExMSAwdjQuNjE5YTEgMSAwIDAxLTEtMXYtMy42MnptLjUtLjk2NGE0LjUgNC41IDAgMTAwLTkgNC41IDQuNSAwIDAwMCA5eiIgaWQ9ImEiLz48L2RlZnM+PHVzZSBmaWxsLW9wYWNpdHk9Ii44NSIgdHJhbnNmb3JtPSJyb3RhdGUoLTQ1IDguNjIzIDguNjM4KSIgeGxpbms6aHJlZj0iI2EiIGZpbGwtcnVsZT0iZXZlbm9kZCIvPjwvc3ZnPg==);
    width: 16px;
    height: 16px;
    background-repeat: no-repeat;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}
.top-input {
    padding: 12px 40px;
    width: 100%;
    height: 48px;
    background-color: #fff;
    border-radius: 4px 0 0 4px;
    font-size: 16px;
    line-height: 20px;
    letter-spacing: -.02em;
    color: rgba(0,0,0,.85);
    text-align: left;
    position: relative;
    box-sizing: border-box;
    transition: all .3s ease;
    border: 1px solid rgba(0,0,0,.15);
    border-right: 0 solid transparent;
    -webkit-appearance: none;
}
.top-input::placeholder {
    color: rgb(195,195,195);
}
.top-input:focus {
    border-color: rgb(0,112,213);
}
.top-search-button {
    border-radius: 0 4px 4px 0;
    height: 48px;
    font-size: 16px;
    line-height: 20px;
    letter-spacing: -.02em;
    background-color: #0070d5;
    color: #fff;
    border: none;
    padding: 12px 16px;
    cursor: pointer;
    white-space: nowrap;
    transition: all .3s ease;
}
.top-search-button:hover {
    background-color: rgb(36,144,227);
}
.search-content {
    border-top: 0px solid rgba(0,0,0,.06);
    font-size: 0;
    margin: 0 auto 0;
    max-width: 1200px;
    padding: 24px 0 64px;
    width: calc(100% - 48px);
}
.search-left-menu {
    display: inline-block;
    font-size: 14px;
    height: auto;
    position: sticky;
    top: 125px;
    vertical-align: top;
    width: 272px;
}
.search-right-content {
    display: inline-block;
    font-size: 14px;
    margin-left: 32px;
    vertical-align: top;
    width: calc(100% - 304px);
}
.knowledge-menu-list .nav-menu{
    background: #f5f5f5;
    border: none;
    padding: 16px 0;
    position: relative;
}
.nav-level1 .single-category span {
    padding-left: 24px;
    padding-right: 24px;
}
.nav-level2 .single-category span{
    padding-left: 48px;
    padding-right: 24px;
}
.nav-level3 .single-category span{
    padding-left: 72px;
    padding-right: 24px;
}
.single-category span {
    display: inline-block;
    width: 100%;
    height: 100%;
}

.single-category {
    display: block;
    line-height: 20px;
    padding-top: 12px;
    padding-bottom: 12px;
    width: 100%;
    cursor: pointer;
    position: relative;
}
.selected-category > .single-category{
    font-weight: bold;  
}
.selected-category > .single-category .down-arrow img{
    transform: rotate(180deg);
}
.selected-category > .single-category span {
    color: black;
}
.nav-level2, .nav-level3 {
    display: none;
}
.selected-category > .nav-level2,
.selected-category > .nav-level3 {
    display: block;
}
.single-category:hover {
    background-color: rgb(240, 240, 240);
}
.down-arrow {
    position: absolute;
    top: 50%;
    height: 100%;
    width: 40px;
    right: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(0, -50%);
}
.down-arrow img.rotate360 {
    transform: rotate(360deg) !important;
}
.down-arrow img.rotate180 {
    transform: rotate(180deg) !important;
}

.search-result {
    font-size: 12px;
    color: rgba(0,0,0,0.45);
}
.search-result.no-result {
    font-size: 16px;
}
.article-item {
    display: block;
    padding: 24px 0;
}
.article-item:not(:last-child) {
    border-bottom: 1px solid rgb(235, 235, 235);
}
.article-title:hover {
    text-decoration: underline;
}
.article-title {
    font-size: 18px;
    color: black;
}
.article-desc {
    font-size: 14px;
    line-height: 20px;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    color: rgba(0,0,0,0.65);
    margin-top: 8px;
}
.article-desc em,
.article-item h2 b {
    font-weight: bold;
    color: red;
}
.applicable-product {
    margin-top: 8px;
    font-size: 12px;
    color: rgba(0,0,0,0.45);
}
.applicable-product span {
    color: inherit;
    font-size: inherit;
}
.pagination {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 24px;
}
.pagination .page-box {
    display: flex;
    align-items: center;
    justify-content: center;
}
.prev-page, .next-page {
    cursor: pointer;
}
.prev-page {
    margin-right: 15px;
}
.next-page {
    margin-left: 15px;
}
.not-allow {
    cursor: not-allowed;
}

.page-input {
    border: 0px solid rgba(0,0,0,.15);
    border-radius: 4px;
    font-size: 14px;
    height: 24px;
    padding: 0;
    text-align: center;
    transition: all .3s ease;
    width: 30px;
}
.page-box .devide {
    margin: 0 10px 0 0;
}