html{
    /*
    这样当
    100vw=1920px时，font-size为16px;
    100vw=960px时，font-size为13px;
    */
    font-size: calc(0.3125vw + 10px);
    color: #333333;
}

body{
    position: relative;
}

.wrapper {
    width: 100%;
    /*
    wrapper-width = 75vw + 160px
    这样当100vw = 1920px时，width为1600px
    这样当100vw = 960px时，width为880px;

    960px k = 720px;
    k = 75vw
    */

    height: 100%;
    max-width: calc(75vw + 160px);
    margin-left: auto;
    margin-right: auto;
}

.wrapper.wider{
    /*
    当100vw=1920px时  两侧边距为30px * 2
    当100vw=960px时  两侧边距为20px * 2
    即，两侧边距为calc(1.04167vw + 10px)
     */
    max-width: calc(100% - 1.04167vw - 10px);
}

body>section{
    position: relative;
}

body>section>.wrapper{
    height: 100%;
    position: relative;

    display: flex;
    flex-direction: column;
}

.site-header{
    width: 100%;
    height: 4.375rem;

    left: 0;
    top: 0;

    background: white;
    position: fixed;
    z-index: 800;
}

.site-logo{
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex: 0 0 12.5rem;
}

.site-logo img{
    width: 100%;
    display: block;
}

.site-nav ul.menu-level-2{
    visibility: hidden;
    position: absolute;
}

.page-ctn{
    margin-top: 4.375rem;
    overflow-x: hidden;
}

.site-header .wrapper{
    display: flex;
}

.site-nav{
    flex-basis: calc(100% - 28rem);
    flex-shrink: 1;
    flex-grow: 0;

    padding-left: 3rem;
    justify-content: center;
}

.site-nav ul{
    display: flex;
    width: 100%;
    height: 100%;
    justify-content: center;
}

.site-nav li.menu-level-2 a{
    padding-left: 1.25rem;
    padding-right: 1.25rem;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.site-nav li.menu-level-2:hover, .site-nav li.menu-level-2.active{
    position: relative;
}

.site-nav li::before{
    content: "";
    position: absolute;
    width: calc(100% - 2.5rem);
    height: 2px;
    left: 1.25rem;
    top: 0;
    background: #e31019;
    display: none;
}


.site-nav li.menu-level-2:hover::before, .site-nav li.menu-level-2.active::before{
    display: block;
}

.right-link{
    flex: 0 0 15.5rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.right-link>*{
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    cursor: pointer;
    width: 3.375rem;
    position: relative;
}

.right-link>*:hover .icon-desc, .right-link>*.active .icon-desc{
    color: #e31019;
}

.right-link>*::before{
    content: "";
    background: center/1.375rem 1.375rem no-repeat;
    width: 1.375rem;
    height: 1.375rem;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: .875rem;
}

.right-link .icon-desc{
    font-size: 10px;
    position: absolute;

    text-align: center;
    width: 180%;
    left: -40%;
    transform: scale(0.75);
    transform-origin: center top;

    top: 2.75rem;
}

.right-link .search{
    padding-right: .625rem;
    width: 3rem;
}

.right-link .search::before{
    background-image: url("../images/icons/search.svg");
}

.right-link .language::before{
    background-image: url("../images/icons/language.svg");
}

.right-link .members::before{
    background-image: url("../images/icons/members.svg");
}

.right-link .mail::before{
    background-image: url("../images/icons/mailbox.svg");
}

.right-link .search:hover{
    padding-right: .625rem;
    width: 3rem;
}

.right-link .search:hover::before{
    background-image: url("../images/icons/search_red.svg");
}

.right-link .language:hover::before{
    background-image: url("../images/icons/language_red.svg");
}

.right-link .members:hover::before{
    background-image: url("../images/icons/members_red.svg");
}

.right-link .mail:hover::before{
    background-image: url("../images/icons/mailbox_red.svg");
}

.btn-solid-rect{
    background: #e31019;
    border: none;
    color: white;
    font-size: 1em;
    line-height: 1.625em;
    padding: .75em 3.5em;
    display: block;
}

.btn-solid-rect:hover{
    background-color: #e9161f;
    color: white;
}



.btn-close {
    position: absolute;
    width: 3.75rem;
    height: 3.75rem;
    background-color: #e31019;
    cursor: pointer;
}

.btn-close:hover {
    background-color: #e9161f;
}

.btn-close::before, .btn-close::after {
    content: "";
    width: 0.06rem;
    height: 1.125rem;
    background-color: white;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
}

.btn-close::before {
    transform: rotate(45deg);
}

.btn-close::after {
    transform: rotate(-45deg);
}

.btn-close:hover::before {
    transform: scale(1.25) rotate(45deg);
}

.btn-close:hover::after {
    transform: scale(1.25) rotate(-45deg);
}

.layout-area{
    max-width: 100%;
}

.site-footer{
    display: flex;
    flex-direction: column;
}

.copyright{
    color: white;
    background-color: rgba(0, 0, 0, .5);
}

.copyright .wrapper{
    line-height: 1.75rem;
    padding-top: 1rem;
    padding-bottom: 1rem;

    display: flex;
    justify-content: space-between;
}

.copyright .right{
    display: flex;
    height: 100%;
    align-items: stretch;
}

.copyright .right a{
    padding: 0 0.9375rem
}

.copyright .right a:last-child{
    padding-right: 0;
}

.header-cover{
    height: 20vw;
    width: 100%;
    position: relative;
}

.site-nav li.menu-level-2.active{
    color: #e31019;
}

.header-cover img{
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 190;
}

.header-cover.with-mask{
    color: white;
}

.header-cover.with-mask::before{
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, .5), transparent);
    z-index: 195;
}

.header-cover.with-mask.full-mask::before{
    background: none rgba(0, 0, 0, .4);
}

.header-cover .wrapper{
    position: relative;
    z-index: 240;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.header-cover .wrapper>*{
    max-width: 40rem;
}

.header-cover.with-mask .wrapper{
    color: white;
}

.header-cover h1 {
    font-size: 2.5rem;
    margin-bottom: 1.125rem;
}

.shoulder-nav-inner{
    background-color: #f7f7f7;
}

.shoulder-nav .mainmenu{
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    height: 100%;
}

.shoulder-nav .mainmenu a{
    display: flex;
    align-items: center;
    height: 100%;
    padding: 0 1.12rem;
}
.shoulder-nav .mainmenu li:first-of-type a{
    padding-left: 0;
}

.shoulder-nav .wrapper{
    position: relative;
}

.shoulder-nav .breadcrumbs{
    position: absolute;
    right: 0;
    display: flex;
    top: calc(100% + 1rem);
    color: #999;
    transition: .2s;
}

.shoulder-nav .breadcrumbs .sep{
    margin-left: .5em;
    margin-right: .5em;
}

.following .breadcrumbs{
    top: 1.125rem;
    color: #666;
}

.breadcrumbs li:last-child .sep{
    display: none;
}

.section-title{
    color: #e31019;
    font-size: 2.5rem;
    line-height: 3rem;
    margin-bottom: 1.5rem;
}

.section-title-small{
    color: #333;
    font-size: 2rem;
    line-height: 3.75rem;
    margin-bottom: 1.875rem;
}

.section-back{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    object-fit: cover;
    z-index: 190;
}

footer{
    background-color: #414141;
    color: white;
}

.copyright{
    color: #bcbcbc
}

.footer-row-1 .wrapper{
    padding-top: 2.25rem;
    padding-bottom: 2.25rem;
    display: flex;
}

footer .social-media{
    flex: 0 0 20rem;
}
nav.footer-nav{
    flex-basis: calc(100% - 20rem);
    flex-shrink: 0;
    flex-grow: 0;
}

nav.footer-nav>ul{
    display: flex;
}

nav.footer-nav>ul>li{
    flex: 0 0 20%;
}

nav.footer-nav>ul>li>a{
    font-weight: 500;
}

nav.footer-nav ul.menu-level-2, .media-list{
    font-size: .875rem;
    margin-top: 1rem;
    color: #bcbcbc;
}

nav.footer-nav ul.menu-level-2 a{
    display: inline-block;
    line-height: 1.5rem;
}

.media-list{
    display: flex;
    margin-top: 1rem;
    flex-wrap: wrap;
    margin-right: calc( -10rem / 3 + 2.75rem);
    margin-left: calc( -10rem / 3 + 2.75rem);
}

.media-list a{
    flex: 0 0 5rem;
    /* margin-right: calc( 20rem / 3 - 5.5rem); */

    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0.2rem;
    position: relative;
}
.media-list a:hover{
    background-color: rgba(0, 0, 0, .1);
    color: inherit;
}


.media-list a .qrcode{
    position: absolute;
    display: block;
    width: 206%;
    height: auto;
    top: -30%;
    left: 50%;
    opacity: 0;
    visibility: hidden;
    transition: .3s;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
    z-index: 9;
}

.media-list a:hover .qrcode{
    left: calc(100%);
    opacity: 1;
    visibility: visible;
}

.media-list a .icon{
    height: 1.875rem;
    width: 1.875rem;
    border: 0.125rem solid #959595;
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: .5rem;
}


.media-list a .icon img{
    max-height: 1rem;
    max-width: 1rem;
}

.shoulder-nav.follow-scroll{
    position: relative;
    z-index: 750;
}

.shoulder-nav.following{
    height: 3.75rem;
}

.shoulder-nav-inner{
    width: 100%;
    height: 3.75rem;
}

.shoulder-nav.follow-scroll.following .shoulder-nav-inner{
    position: fixed;
    top: 4.375rem;
    left: 0;
}

.shoulder-nav .active, .shoulder-nav .scroll-active{
    color: #e31019;
}

.follow-scroll .shoulder-nav-inner::after{
    content: "";
    position: absolute;
    width: 100%;
    height: 4rem;
    top: 100%;
    left: 0;
    background: linear-gradient(to bottom, black, transparent);
    opacity: 0;
    transition: .3s;
    visibility: hidden;
    z-index: 300;
}

.following .shoulder-nav-inner::after{
    opacity: .15;
    visibility: visible;
}


.intro-ctn{
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.intro-cover{
    position: absolute;
    width: 50%;
    height: 100%;
    right: 0;
    top: 0;
    z-index: 215;
}

.intro-cover::after{
    content: "";
    position: absolute;
    width: 25%;
    height: 50%;
    bottom: 0;
    right: 100%;
    background-color: #e31019;
}

.intro-cover img{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    object-fit: cover;
}

.intro-box{
    width: 57.5%;
    margin-top: 5rem;
    margin-bottom: 4.5rem;
    position: relative;
    z-index: 240;
    background-color: #f7f7f7;
    padding: 3.375rem 3.5rem;
}

.intro-box .layout-area{
    display: flex;
    flex-direction: column;
}

.intro-box h3{
    font-size: 1.875rem;
    line-height: 3rem;
    margin-bottom: .25rem;
}

.intro-box p{
    margin-top: .75rem;
    margin-bottom: .75rem;
}

ul.expandable-list{
}

.expandable-list li{
    position: relative;
    cursor: pointer;
    border-top: 1px solid #dcdcdc;
}

.expandable-list li:last-of-type{
    border-bottom: 1px solid #dcdcdc;
}

.expandable-list li::after{
    content: "";
    width: 2.25rem;
    height: 2.25rem;
    position: absolute;
    top: calc((5.5rem - 2.25rem) / 2);
    left: 1.75rem;

    background: url("../images/icons/expand_gray.png") center/contain no-repeat;
}

.expandable-list li:hover::after{
    background-image: url("../images/icons/expand_red.png")
}

.expandable-list li.expanded::after{
    background-image: url("../images/icons/expanded.png")
}

.expandable-list li:hover .title, .expandable-list li.expanded .title{
    color: #e31019;
}

.expandable-list li .title{
    font-size: 1.25rem;
    padding: 1.75rem 5.625rem 1.75rem 6.75rem;
    height: 5.5rem;
    line-height: 2rem;
}

.expandable-list li .content{
    padding-left: 6.75rem;
    padding-right: 5.625rem;
    padding-bottom: 2.5rem;
    display: none;
}

.expandable-list li.expanded .content{
    display: block;
}

.expandable-list li h3{
    color: #e31019;
    margin-top: 1.5rem;
    margin-bottom: 0;
}

.expandable-list li h3:first-child{
    margin-top: 0;
}

.expandable-list li p{
    color: #666;
    margin: 0;
}

.yiiPager{
    display: flex;
    justify-content: center;
    align-items: stretch;
    height: 2.75rem;
}

.yiiPager .first, .yiiPager .last{
    display: none;
}

.yiiPager li{
    flex: 0 0 2.75rem;
    margin: 0 0.3125rem;
    position: relative;
}

.yiiPager a{
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    padding: 0.75rem;
    line-height: 1.25rem;
    border-radius: 50%;
    border: 1px solid #d7d7d7;
    color: #000;
    position: relative;
}

.yiiPager a:hover{
    border-color: #e31019;
    color: #e31019;
}

.yiiPager .selected a{
    border: none;
    color: white;
    background-color: #e31019;
}


.yiiPager .previous a,
.yiiPager .next a{
    background-color: #d7d7d7;
}

.yiiPager .hidden::after{
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(255, 255, 255, .5);
    z-index: 240;
}

.previous a::before, .next a::before{
    content: "";
    width: 0.5625rem;
    height: 0.875rem;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    background: center/contain no-repeat;
}

.previous a::before{
    background-image: url("../images/icons/page_prev.png");
}

.next a::before{
    background-image: url("../images/icons/page_next.png");
}

.previous a:hover::before{
    background-image: url("../images/icons/page_prev_red.png");
}

.next a:hover::before{
    background-image: url("../images/icons/page_next_red.png");
}

.img-swiper .swiper-slide{
    flex-basis: 100%;
    flex-grow: 0;
    flex-shrink: 0;
}

.img-swiper .swiper-slide img{
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-swiper .swiper-button-prev{
    top: 0;
    left: 0;
    width: 5rem;
    height: 100%;
    margin-top: 0;
    background: none;
}

.img-swiper .swiper-button-next{
    top: 0;
    right: 0;
    width: 5rem;
    height: 100%;
    margin-top: 0;
    background: none;
}

.img-swiper .swiper-button-prev::after, .img-swiper .swiper-button-next::after{
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to left, transparent, rgba(0, 0, 0, .5));
    transition: .3s;
    opacity: 0;
    z-index: 210;
}

.img-swiper .swiper-button-next::after{
    background: linear-gradient(to right, transparent, rgba(0, 0, 0, .5));
}

.img-swiper .swiper-button-prev:hover::after,
.img-swiper .swiper-button-next:hover::after{
    opacity: 1;
}

.img-swiper .swiper-button-prev::before, .img-swiper .swiper-button-next::before{
    content: "";
    position: absolute;
    width: 0.875rem;
    height: 1.625rem;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    background: url("../images/icons/solution_prev.png") center/contain no-repeat;
    z-index: 240;
}

.img-swiper .swiper-button-next::before{
    background: url("../images/icons/solution_next.png") center/contain no-repeat;
}

.popup-submenu-list{
    width: 100%;
    height: 0;
    position: fixed;
    left: 0;
    top: 4.375rem;
    z-index: 810;
}

/*
1920=>960
960=>600

960=>360

k=.375
b = 240
*/

.popup-submenu{
    position: absolute;
    background-color: white;
    border: 1px solid #d3d3d3;
    width: calc(30vw + 180px);
}

.popup-submenu{
    display: flex;
    counter-increment: marginLeft 1;
    left: 0;
    right: 0;
    margin: auto;
}

.popup-submenu .left{
    flex: 0 0 67%;
}

.popup-submenu .right{
    flex: 0 0 33%;
}

.popup-submenu:nth-child(1){
    left: -10%;
}

.popup-submenu:nth-child(2){
    left: 0;
}

.popup-submenu:nth-child(3){
    left: 10%;
}

.popup-submenu:nth-child(4){
    left: 20%;
}

.popup-submenu:nth-child(5){
    left: 30%;
}

.popup-submenu{
    padding: 2.25rem;
}

.popup-submenu .left{
    padding-right: 2.25rem;
    border-right: 1px solid #d3d3d3;
    color: #666666;

    display: flex;
    flex-direction: column;
}

.popup-submenu h2{
    font-size: 2.5rem;
    color: #111;
    margin-bottom: .75rem;
}
.popup-submenu .left p{
    line-height: 1.5rem;
    min-height: 4.5rem;
}
.popup-submenu .left .layout-area{
    margin-bottom: 1rem;
}

.popup-submenu .right{
    padding-left: 2.25rem;
}

.popup-submenu .view-more{
    display: block;
    width: 3.75rem;
    height: 3.75rem;
    background: url("../images/icons/arrow_right_small_white.png") #e31019 center/0.9375rem 0.625rem no-repeat ;
    align-items: flex-end;
    margin-top: auto;
    margin-bottom: 0;
}

.popup-submenu .view-more:hover{
    background-color: #e9161f;
}

.popup-submenu .right ul li{
    counter-increment: itemIndex;
    color: #333333;
    position: relative;
}
.popup-submenu .right ul li a::before{
    content: "";
    position: absolute;
    width: 2px;
    height: 1em;
    background: #e31019;
    left: -1em;
    top: 0;
    bottom: 0;
    margin: auto;
}

.popup-submenu .right ul li a{
    display: block;
    line-height: 1.5rem;
    padding-top: .5rem;
    padding-bottom: .5rem;
}
.popup-submenu .right ul li:first-child{
    margin-top: -.5rem;
}
.popup-submenu .right ul li:last-child{
    margin-bottom: -.5rem;
}

.right-link>*:hover .drop-list{
    visibility: visible;
    opacity: 1;
}

.language{
    position: relative;
}

.drop-list{
    position: absolute;
    width: 11.25rem;
    background-color: #f1f2f2;
    z-index: 808;
    right: calc((3.375rem - 11.25rem) / 2);
    top: 4.375rem;
    padding-top: .5rem;
    padding-bottom: .5rem;
    visibility: hidden;
    opacity: 0;
    transition: .3s;
}

.drop-list::before{
    content: "";
    top: -.875rem;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    height: 0;
    width: 0;
    border-bottom: .875rem solid #f1f2f2;
    border-left: .875rem solid transparent;
    border-right: .875rem solid transparent;
}

.drop-list a{
    line-height: 1.5rem;
    padding-top: .5rem;
    padding-bottom: .5rem;
    text-align: center;
    display: block;
}

.members .drop-list{
    width: 18rem;
    right: 0;
    position: fixed;
}

.site-header .search-box{
    background-color: #f1f2f2;
}

.site-header .search-box .wrapper{
    padding: 2.75rem 0;
}

.input-form{
    width: 100%;
    position: relative;
}

.site-header .search-box input{
    font-size: 2.5rem;
    padding: .75rem 5rem .75rem 3rem;
    display: block;
    width: 100%;
    border: none;
    border-bottom: 1px solid #939598;
    background: url("../images/icons/search_red.svg") transparent 0 55%/1.375rem 1.375rem no-repeat;
}

.site-header .search-box input:focus{
    border-bottom: 1px solid #e31019;
}

.site-header .search-box input::-webkit-input-placeholder{
    color: #939598;
}

.site-header .search-box button{
    position: absolute;
    border: none;
    width: 3.75rem;
    height: 3.75rem;
    background: url("../images/icons/arrow_right_small_white.png") #e31019 center/.9375rem .625rem no-repeat;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    cursor: pointer;
}

.site-header .search-box button:hover{
    background-color: #e9161f;
}

.site-header .search-box{
    position: relative;
}

.site-header .search-box::before{
    content: "";
    top: -.875rem;
    position: absolute;
    right: 1.25rem;
    height: 0;
    width: 0;
    border-bottom: .875rem solid #f1f2f2;
    border-left: .875rem solid transparent;
    border-right: .875rem solid transparent;
}

.search.active::before{
    background-image: url("../images/icons/search_red.svg");
}

.mobile-menu-toggle{
    display: none;
}

.mobile-menu-toggle::after{
    content: "";
    width: 1.375rem;
    height: 1.125rem;
    background: linear-gradient(to bottom, #111 2px,
    transparent 2px, transparent calc(50% - 1px),
    #111 calc(50% - 1px), #111 calc(50% + 1px),
    transparent calc(50% + 1px), transparent calc(100% - 2px),
    #111 calc(100% - 2px)
    );
}


nav .btn-mobile-close{
    position: absolute;
    width: 4.25rem;
    height: 4.25rem;
    top: 0;
    right: 0;
    object-fit: cover;
    background-color: #e31019;
    cursor: pointer;
    display: none;
}

nav .btn-mobile-close:hover{
    background-color: #e9161f;
}

nav .btn-mobile-close::before, nav .btn-mobile-close::after{
    content: "";
    width: 0.2rem;
    height: 1.5rem;
    background-color: white;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
}

nav .btn-mobile-close::before{
    transform: rotate(45deg);
}

nav .btn-mobile-close::after{
    transform: rotate(-45deg);
}

.btn-back{
    line-height: 2.5em;
    padding-left: 1em;
    padding-right: 1em;
    background-color: #e31019;
    color: white;
    display: inline-block;
    cursor: pointer;
}

.btn-back:hover{
    background-color: #e9161f;
}

.btn-back-ctn{
    margin-bottom: 30px;
}