* {
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
    font-family: Arial, "Microsoft Yahei", "Helvetica Neue", Helvetica, sans-serif;
}

body {
    width: 100%;
    overflow-x: hidden;
}

:root {
    --master-color: #27519B;
    --master-deep-color: #1C2953;
    --swiper-theme-color: #27519B;
}

.header {
    width: 100%;
    height: 138px;
    background: #FFF;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
    position: fixed;
    z-index: 9;
}

.pc_menu {
    width: 1400px;
    margin: 0 auto;
}

.pc_menu ul {
    display: flex;
    justify-content: space-around;
}

.pc_menu ul li {
    display: block;
    height: 138px;
    line-height: 138px;
}

.pc_menu ul li a {
    font-size: 20px;
    color: #4D4D4D;
    text-shadow: 0.5px 0 0 var(--master-color);
}

.pc_menu .active a {
    color: var(--master-color);
}

.pc_menu ul li a:hover {
    color: var(--master-color);
}

.head-menu-box-mobile,
.m-menu {
    display: none;
}

.logo {
    margin: 0 30px;
}

.logo img {
    width: auto;
    height: 100px;
    margin-top: 15px;
}

.footer {
    width: 100%;
    margin: 80px 0 50px 0;
    background: #FFF;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer_company {
    width: 90%;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer_company .empty_hr {
    width: 26%;
}

.footer_company .empty_hr hr {
    border: solid 2px #989898;
}

.footer_company_title {
    width: 48%;
    text-align: center;
    font-size: 40px;
    text-align: center;
    font-weight: bold;
    color: #CECECE;
    text-transform: uppercase;
}

.related_websites {
    width: 1400px;
    height: 100px;
    margin: 80px 0 60px 0;
    background: url(../imgs/logo.png) no-repeat;
    background-position: center bottom;
    background-size: auto 100px;
    display: flex;
    align-items: end;
    justify-content: end;
}

.related_websites_container {
    display: flex;
    flex-direction: column;
}

.related_websites_button {
    width: 220px;
    height: 48px;
    text-align: center;
    line-height: 48px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 48px;
    background: #FFF;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.related_websites_button:hover {
    cursor: pointer;
}

.related_websites_box {
    display: flex;
    flex-direction: column;
    width: 220px;
    margin-bottom: 20px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
    box-sizing: border-box;
    border-radius: 24px;
    display: none;
}

.related_websites_box a {
    display: block;
    width: 100%;
    height: 48px;
    line-height: 48px;
    color: #292929;
    background: #FFF;
    text-align: center;
}

.related_websites_box a:first-child {
    border-radius: 24px 24px 0 0;
}

.related_websites_box a:last-child {
    border-radius: 0 0 24px 24px;
}

.related_websites_box a:hover {
    color: #FFF;
    background: var(--master-color);
}

.footer_menu {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
}

.footer_menu ul {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.footer_menu ul .active a {
    color: #000;
    text-shadow: 0.1px 0 0 #000;
}

.footer_menu ul li a:hover {
    color: #000;
    text-shadow: 0.1px 0 0 #000;
}

.footer_menu ul li a {
    color: #989898;
    text-shadow: 0.1px 0 0 #989898;
    font-size: 20px;
    letter-spacing: 0.2px;
}

.copyright {
    width: 100%;
    margin: 0 auto;
    margin-top: 30px;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    color: #989898;
    display: flex;
    align-items: end;
    justify-content: center;
}

.banner {
    padding-top: 138px;
    width: 100%;
    height: 700px;
}

.banner img {
    width: 100%;
    height: 100%;
}

.home_about_us {
    width: 1272px;
    margin: 0 auto;
    margin-top: 120px;
    display: flex;
}

.home_about_us_left {
    width: 567px;
}

.home_about_us_left img {
    width: 100%;
}

.home_about_us_right {
    width: 705px;
    height: 645px;
}

.home_about_us_icon {
    width: 620px;
    display: flex;
    justify-content: end;
}

.home_about_us_content {
    width: 822px;
    height: 645px;
    background: #FFF;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    border-radius: 30px;
    margin: -28px 0 0 -116px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.home_about_us_content_container {
    width: 550px;
    height: 400px;
}

.home_about_us_title {
    font-size: 48px;
    font-weight: bold;
    color: var(--master-deep-color);
}

.home_about_us_company {
    text-transform: uppercase;
    font-weight: bold;
    color: var(--master-deep-color);
    font-size: 24px;
    margin: 30px 0 20px 0;
}

.home_about_us_text {
    font-size: 16px;
    line-height: 32px;
    max-height: 200px;
    overflow: hidden;
}

.home_about_us_button {
    width: 100%;
    margin-top: 40px;
    display: flex;
    justify-content: end;
}

.spin_button a:hover>img {
    animation: spin 300ms;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(90deg);
    }
}

.home_products {
    width: 100%;
    margin-top: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.common_title {
    width: 100%;
    text-align: center;
    font-size: 40px;
    font-weight: bold;
    color: var(--master-deep-color);
}

.home_products_list {
    width: 1450px;
    margin-top: 100px;
    display: flex;
    justify-content: space-between;
}

.home_product_block {
    width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.home_product_cover {
    width: 150px;
    height: 150px;
}

.home_product_cover img {
    width: 100%;
    height: 100%;
}

.home_product_title {
    width: 150px;
    min-height: 100px;
    font-size: 24px;
    line-height: 30px;
    font-weight: bold;
    margin-top: 30px;
    text-align: center;
    word-wrap: break-word;
}

.home_product_title a {
    color: var(--master-deep-color);
}

.home_products_button {
    width: 100%;
    text-align: center;
    margin: 50px 0;
}

.reputation {
    width: 100%;
    height: 436px;
    background: url(../imgs/home/3.png) no-repeat;
    background-position: center center;
    background-size: cover;
    color: #FFF;
    font-size: 44px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

.home_news_center {
    width: 100%;
    margin-top: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.home_news_bg {
    width: 1451px;
    height: 150px;
    margin-top: 100px;
    background: url(../imgs/home/4.jpg) no-repeat;
    background-size: cover;
    background-position: top left;
}

.home_news_list {
    width: 1442px;
    height: 670px;
    display: flex;
}

.home_news_block {
    width: 481px;
    height: 520px;
    border-left: solid 1px #EEE;
    border-right: solid 1px #EEE;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #595959;
}

.home_news_block:first-child {
    border-left: solid 2px #EEE;
}

.home_news_block:last-child {
    border-right: solid 2px #EEE;
}

.home_news_title {
    width: 400px;
    height: 32px;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 50px 0;
    text-align: center;
}

.home_news_title a {
    font-size: 32px;
    font-weight: bold;
    color: #575757;
}

.home_news_content {
    width: 380px;
    height: 100px;
    margin-top: 20px;
    font-size: 18px;
    line-height: 27px;
}

.home_news_date {
    width: 100%;
    text-align: center;
    margin: 70px 0 50px 0;
}

.home_news_button {
    display: none;
}

.home_news_block:hover>.home_news_button {
    display: block;
}

.home_news_block:hover>.home_news_title a {
    color: var(--master-color);
}

.home_contact_us {
    width: 1451px;
    height: 473px;
    margin: 50px auto 150px auto;
    background: #27519B;
    display: flex;
    align-items: center;
    justify-content: center;
}

.home_contact_us_container {
    width: 1100px;
    height: 250px;
    display: flex;
}

.home_contact_us_left {
    width: 800px;
    height: 250px;
}

.home_contact_us_right {
    width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.home_contact_us_right1 {
    font-size: 44px;
    font-weight: bold;
    color: #FFF;
}

.home_contact_us_right2 {
    font-size: 46px;
    font-weight: bold;
    color: #677EB2;
    margin-top: -16px;
}

.home_contact_us_row {
    width: 100%;
    color: #FFF;
    font-size: 24px;
    display: flex;
    margin-bottom: 16px;
}

.home_contact_us_row a {
    color: inherit;
}

.home_contact_us_row a:hover {
    text-decoration: underline;
    text-underline-offset: 8px;
}

.home_contact_us_row .label::after {
    content: ":";
}

.home_contact_us_row .label {
    display: block;
    width: 160px;
}

.profile_banner {
    background: url(../imgs/profile/banner.png) no-repeat;
    background-position: center center;
    background-size: cover;
    color: #FFF;
    font-size: 60px;
    font-weight: bold;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.subpage_common_title {
    margin: 0 auto;
    text-align: center;
    font-size: 48px;
    font-weight: bold;
    font-style: italic;
    color: var(--master-deep-color);
    border-bottom: solid 10px var(--master-deep-color);
}

.profile_title {
    width: 255px;
}

.our_commitment_title {
    width: 455px;
    margin-top: 120px;
}

.profile_company {
    font-size: 36px;
    font-weight: bold;
    text-transform: uppercase;
    margin: 80px 0 40px 0;
}

.profile_content {
    font-size: 22px;
    line-height: 33px;
}

.reputation_and_customer {
    width: 80%;
    height: 250px;
    margin: 40px auto 0 auto;
    display: flex;
}

.reputation_and_customer div {
    width: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.reputation_and_customer div img {
    width: 100px;
    height: auto;
}

.reputation_and_customer div span {
    font-weight: bold;
    color: #000;
    margin-top: 30px;
}

.reputation_and_customer_content {
    font-size: 24px;
    line-height: 36px;
    margin-bottom: 150px;
}

.products_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.products_title {
    width: 270px;
    margin-bottom: 120px;
}

.products_row {
    width: 1160px;
    height: 600px;
    margin: 50px auto;
    display: flex;
    justify-content: space-between;
}

.products_block {
    width: 555px;
    height: 599px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.products_series_title {
    width: 380px;
    text-align: center;
}

.products_series_title a {
    font-size: 32px;
    font-weight: bold;
    color: var(--master-color);
}

.products_series_title a:hover {
    color: var(--master-deep-color);
}

.products_series_list {
    min-width: 200px;
    max-width: 330px;
    height: 200px;
    margin-top: 25px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.products_series_list a {
    display: block;
    width: 100%;
    margin-top: 10px;
    color: var(--master-color);
    display: flex;
}

.products_series_list a:hover {
    color: var(--master-deep-color);
}

.products_series_list a span {
    display: block;
    padding-right: 10px;
    width: calc(90% - 10px);
    overflow: hidden;
}

.products_series_list a i {
    display: block;
    width: 10%;
}

.products_series_button {
    width: 350px;
    margin-top: 40px;
}

.products_series_button a {
    display: block;
    width: 100px;
    height: 45px;
    line-height: 45px;
    border-radius: 45px;
    text-align: center;
    background: var(--master-color);
    color: #FFF;
}

.products_series_button a:hover {
    background: var(--master-deep-color);
}

.how_to_use_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.how_to_use_title {
    width: 310px;
    margin-bottom: 70px;
}

.how_to_use_content {
    width: 100%;
    height: 100px;
    text-align: center;
    font-size: 18px;
    line-height: 24px;
    word-wrap: break-word;
}

.how_to_use_block {
    width: calc(100% - 120px);
    min-height: 200px;
    background-size: 50px;
    background-position: -2px -2px;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 24px;
    font-weight: bold;
    padding: 30px 60px;
    margin-bottom: 40px;
}

.how_to_use_block1 {
    border: solid 4px #5A77B9;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/01.png);
}

.how_to_use_block2 {
    border: solid 4px #0B58A7;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/02.png);
}

.how_to_use_block3 {
    border: solid 4px #192C72;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/03.png);
}

.how_to_use_block4 {
    border: solid 4px #1C2954;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/04.png);
}

.how_to_use_block5 {
    border: solid 4px #0B58A7;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/05.png);
}

.how_to_use_block6 {
    border: solid 4px #5A77BA;
    border-radius: 8px;
    background-image: url(../imgs/how-to-use/06.png);
}

.applications_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.applications_title {
    width: 355px;
    margin-bottom: 80px;
}

.applications_row {
    width: 100%;
    margin-top: 30px;
    display: flex;
    flex-direction: column;
}

.applications_row_title {
    color: var(--master-color);
    font-size: 28px;
    font-weight: bold;
}

.applications_row_content {
    font-size: 18px;
    line-height: 27px;
    color: #595959;
    margin-top: 15px;
}

.why_choose_us_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.why_choose_us_title {
    width: 420px;
    margin-bottom: 80px;
}

.why_choose_us_box {
    width: 1600px;
    height: 350px;
    margin: 0 auto;
    margin-top: 50px;
    display: flex;
    justify-content: space-between;
}

.why_choose_us_box img {
    width: auto;
    height: 100%;
}

.why_choose_us_line_box {
    width: 1000px;
    display: flex;
    flex-direction: column;
    justify-content: end;
}

.why_choose_us_line_box span {
    font-size: 44px;
    color: var(--master-color);
    text-shadow: 0.5px 0 0 var(--master-color);
    margin-bottom: 20px;
}

.why_choose_us_line_box .why_choose_us_text {
    font-size: 24px;
    color: #4D4D4D;
    line-height: 48px;
}

.storage_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.storage_title {
    width: 240px;
    margin-bottom: 80px;
}

.storage_content {
    width: 100%;
    font-size: 18px;
    line-height: 24px;
}

.blog_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.blog_title {
    width: 150px;
    margin-bottom: 80px;
}

.blog_block {
    width: 100%;
    height: 240px;
    margin: 50px 0;
    box-sizing: border-box;
    border: solid 1px #CECECE;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog_block:hover {
    border: solid 2px var(--master-deep-color);
}

.blog_block_preview {
    width: 1250px;
    height: 180px;
}

.blog_block_date {
    font-weight: bold;
    color: #767676;
    font-size: 18px;
    margin-top: 15px;
    letter-spacing: 1px;
}

.blog_block_title {
    width: 100%;
    font-size: 28px;
    margin: 30px 0 10px 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.blog_block_title a {
    color: var(--master-color);
}

.blog_block_title a:hover {
    color: var(--master-deep-color);
}


.blog_block_content {
    width: 100%;
    height: 50px;
    margin-top: 30px;
    font-size: 16px;
    line-height: 24px;
    word-wrap: break-word;
    overflow: hidden;
}

.contact_us_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.contact_us_title {
    width: 315px;
    margin-bottom: 80px;
}

.contact_us_info {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.contact_us_info_left {
    width: 300px;
    height: 414px;
}

.contact_us_info_right {
    width: calc(100% - 450px);
    height: 360px;
    margin-top: 27px;
}

.contact_us_info_rows {
    width: 100%;
    margin: 28px 0;
    font-size: 24px;
    font-weight: bold;
    color: var(--master-deep-color);
    display: flex;
}

.contact_us_info_rows span {
    display: block;
}

.contact_us_info_rows .label {
    width: 150px;
}

.contact_us_info_rows .label::after {
    content: ":";
}

.contact_us_info_rows span a {
    color: inherit;
}

.contact_us_info_rows span a:hover {
    color: var(--master-color);
}

.contact_us_content {
    width: 100%;
    margin: 120px 0;
    display: flex;
    flex-direction: column;
}

.contact_us_content p {
    width: 100%;
    text-align: center;
    font-size: 24px;
    line-height: 36px;
    text-shadow: 0.2px 0 0 var(--master-color);
    color: var(--master-color);
}

.where_we_are_title {
    width: 385px;
}

.contact_us_map {
    width: 100%;
    height: 620px;
    margin: 100px 0;
    border: solid 3px var(--master-deep-color);
}

.blog_detail_container {
    width: 1400px;
    margin: 100px auto;
    color: #595959;
}

.blog_detail_page_title {
    display: inline-block;
    max-width: 100%;
    word-break: break-all;
    border-bottom: 5px solid var(--master-deep-color);
}

.blog_detail_date {
    width: 100%;
    color: #4D4D4D;
    margin-top: 60px;
}

.blog_detail_title {
    width: 100%;
    margin: 20px 0;
    word-break: break-all;
    font-size: 28px;
    color: var(--master-deep-color);
}

.blog_detail_content {
    margin-top: 60px;
    font-size: 20px;
    line-height: 40px;
}

.blog_detail_return_button {
    width: 100%;
    margin-top: 90px;
}

.blog_detail_return_button a {
    display: block;
    width: 340px;
    height: 64px;
    line-height: 64px;
    text-align: center;
    margin: 0 auto;
    background: var(--master-color);
    color: #FFF;
    font-size: 28px;
    font-weight: bold;
    text-transform: uppercase;
    border-radius: 32px;
}

.products_series_container {
    width: 1300px;
    margin: 100px auto;
    color: #595959;
}

.products_series_in_title {
    margin: 0 auto;
    text-align: center;
    font-size: 48px;
    font-weight: bold;
    font-style: italic;
    color: var(--master-deep-color);
}

.title_underline_hr {
    width: 250px;
    margin: 20px auto 0 auto;
    border-top: solid 10px var(--master-deep-color);
}

.products_series_row {
    width: 100%;
    height: 550px;
    margin: 100px 0;
    display: flex;
    justify-content: space-between;
}

.products_series_block {
    width: 400px;
    height: 550px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.products_series_block:hover:hover {
    background: var(--master-color);
    transition: all 300ms;
}

.products_series_block:hover>* {
    color: #FFF;
}

.products_series_block:hover>.products_series_block_title a {
    color: #FFF;
}

.products_series_cover img {
    width: 189px;
    height: 189px;
}

.products_series_block_title {
    font-size: 20px;
    margin: 30px 0;
    width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

.products_series_block_title a {
    color: var(--master-color);
}

.products_series_content {
    width: 330px;
    height: 220px;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 18px;
    line-height: 36px;
    word-break: keep-all;
}

.products_series_content a {
    color: inherit;
}

.product_detail {
    width: 1405px;
    margin: 0 auto;
    margin-bottom: 100px;
}

.breadcrumb {
    width: 100%;
    margin-top: 40px;
}

.breadcrumb a {
    color: #000;
    font-weight: bold;
}

.breadcrumb a:hover {
    color: var(--master-color);
}

.product_detail_title_box {
    width: 100%;
    margin-top: 30px;
    padding-bottom: 10px;
    border-bottom: solid 1px #DDDDDD;
    display: flex;
    justify-content: space-between;
}

.product_detail_title {
    width: 800px;
    font-size: 33px;
    font-weight: bold;
    color: var(--master-color);
}

.product_detail_company {
    display: flex;
    flex-direction: column;
    align-items: end;
    justify-content: end;
    font-size: 24px;
    font-weight: bold;
    font-style: italic;
    color: #D8D8D8;
    background: -webkit-gradient(linear, left top, right top, color-stop(0, #D8D8D8), color-stop(.4, #D8D8D8), color-stop(.5, white), color-stop(.6, #D8D8D8), color-stop(1, #D8D8D8));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: flash 3s infinite;
    -webkit-animation: flash 3s infinite;
}

@keyframes flash {
    0% {
        background-position: -250px;
    }

    100% {
        background-position: 250px;
    }
}

.product_detail_cover {
    width: 270px;
    height: 270px;
    margin-top: 50px;
}

.product_detail_cover img {
    width: 270px;
    height: 270px;
}

.product_detail_modules {
    width: 100%;
}

.product_detail_modules_title {
    width: calc(100% - 20px);
    height: 50px;
    line-height: 50px;
    color: #FFF;
    background: var(--master-color);
    font-size: 22px;
    padding-left: 20px;
    font-weight: bold;
    margin: 30px 0 20px 0;
}

.table_container {
    width: 100%;
    margin: 20px 0;
    overflow-x: auto;
}

.normal_table {
    border-collapse: collapse;
    width: 100%;
}

.normal_table th,
.normal_table td {
    height: 30px;
    line-height: 30px;
    padding: 5px 15px;
    border: solid 1px #000;
    text-align: left;
}

.normal_table a {
    color: inherit;
}

.product_detail_content {
    font-size: 18px;
    line-height: 36px;
}

.product_detail_content a {
    color: inherit;
}

.product_detail_content a:hover {
    color: var(--master-color);
}

.quote_box {
    background: url(../imgs/quote.jpg) no-repeat;
    background-position: right bottom;
}

.product_detail_images {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
}

.product_detail_images img {
    width: 100%;
    margin-top: 20px;
}

.product_tab_toggle {
    width: 100%;
    margin: 10px 0;
    display: flex;
}

.product_tab_toggle div {
    width: 33.333333%;
    background: var(--master-color);
    color: #FFF;
    height: 50px;
    line-height: 50px;
    text-align: center;
    font-size: 20px;
    font-weight: bold;
}

.product_sub_selected {
    box-shadow: 5px 5px 5px rgba(39, 81, 155, 0.5);
    text-decoration: underline;
    text-underline-offset: 5px;
}

.product_tab_toggle div:hover {
    cursor: pointer;
}

.product_faq_q {
    color: #000;
}

.product_faq_a {
    color: #404040;
}

.product_faq_a a {
    color: var(--master-color);
}

.news_detail_return_btn {
    width: 100%;
    height: 50px;
    background: var(--master-deep-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product_detail_return_btn {
    width: 100%;
    margin-top: 100px;
    text-align: center;
}

.product_detail_return_btn a {
    display: block;
    width: 340px;
    height: 64px;
    margin: 0 auto;
    text-align: center;
    line-height: 64px;
    border-radius: 32px;
    background: var(--master-color);
    color: #FFF;
    font-size: 24px;
    font-weight: bold;
}

.product_detail_return_btn a:hover {
    background: var(--master-deep-color);
}

.product_detail_download_box {
    margin-top: 100px;
}

.product_detail_download_btn {
    width: 100%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background: var(--master-color);
    background-size: 2px 2px;
    background-position: right center;
    margin-top: 10px;
}

.product_detail_download_btn a {
    color: #FFF;
    font-size: 24px;
    font-weight: bold;
}

.product_detail_download_btn i {
    display: block;
    line-height: 50px;
    margin-right: 20px;
    float: right;
    color: #FFF;
    font-size: 24px;
}

.safety_infomation_box,
.synthenic_route_box,
.biological_activity_box {
    display: none;
}

@media screen and (max-width: 1600px) {
    .banner {
        height: 640px;
    }

    .footer_company_title {
        font-size: 38px;
    }

    .why_choose_us_box {
        width: 1400px;
        height: 300px;
        margin-top: 100px;
    }

    .why_choose_us_box img {
        width: 450px;
        height: 300px;
    }

    .why_choose_us_line_box {
        width: 850px;
    }
}

@media screen and (max-width: 1440px) {
    .header {
        height: 100px;
    }

    .pc_menu {
        width: 1300px;
    }

    .pc_menu ul li {
        height: 100px;
        line-height: 100px;
    }

    .logo img {
        height: 70px;
    }

    .banner {
        height: 520px;
        padding-top: 100px
    }

    .home_products_list {
        width: 1300px;
    }

    .home_news_bg {
        width: 1298px;
        height: 134px;
        background-size: contain;
    }

    .home_news_list {
        width: 1289px;
    }

    .related_websites {
        width: 1300px;
    }

    .footer_company_title {
        font-size: 33px;
    }

    .profile_container,
    .how_to_use_container,
    .applications_container,
    .why_choose_us_container,
    .storage_container,
    .blog_container,
    .contact_us_container {
        width: 1300px;
    }

    .why_choose_us_box {
        width: 1300px;
        height: 260px;
        margin-top: 50px;
    }

    .why_choose_us_box img {
        width: 390px;
        height: 260px;
    }

    .why_choose_us_line_box .why_choose_us_text {
        font-size: 20px;
        line-height: 40px;
    }

    .blog_block_preview {
        width: 1150px;
    }
}

@media screen and (max-width: 1366px) {
    .header {
        height: 90px;
    }

    .pc_menu {
        width: 1200px;
    }

    .pc_menu ul li {
        height: 90px;
        line-height: 90px;
    }

    .pc_menu ul li a {
        font-size: 16px;
    }

    .logo img {
        height: 60px;
    }

    .banner {
        height: 520px;
        padding-top: 90px
    }

    .home_about_us {
        width: 1200px;
    }

    .home_products_list {
        width: 1300px;
    }

    .home_news_bg {
        width: 1298px;
        height: 134px;
        background-size: contain;
    }

    .home_news_list {
        width: 1289px;
    }

    .related_websites {
        width: 1150px;
    }

    .footer_company_title {
        font-size: 30px;
    }

    .profile_container,
    .how_to_use_container,
    .applications_container,
    .why_choose_us_container,
    .storage_container,
    .blog_container,
    .contact_us_container,
    .products_container {
        width: 1150px;
    }
    .products_row{
        width: 1000px;
    }
    .products_block{
        width: 450px;
        height: 500px;
    }

    .why_choose_us_box {
        width: 1150px;
        height: 260px;
        margin-top: 75px;
    }

    .why_choose_us_box img {
        width: 390px;
        height: 260px;
    }

    .why_choose_us_line_box .why_choose_us_text {
        font-size: 18px;
        line-height: 36px;
    }

    .blog_block_preview {
        width: 1000px;
    }
    
    .why_choose_us_line_box {
        width: 650px;
    }
}