.under_line {
    text-align: center;
    width: 58px;
    border-bottom: 4px solid red;
    margin: 6px auto;
}

.white_point {
    width: 15px;
    height: 15px;
    background-color: white;
    border-radius: 50%;
}

html {
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    color: #333333;
}

.location {
    display: flex;
    align-items: center;
    justify-content: left;
    border-bottom: 2px solid rgb(245, 245, 245);
    height: 40px;
    margin-bottom: 30px;
}

.location .container {
    /*font-size: 10px;*/
    text-align: left;
    font-size: 13px;
}

.title {
    font-weight: bold;
    font-size: 30px;
    margin-bottom: 0;
}

.sub_title {
    color: #484848;
    font-size: 16px;
}

/*排名*/
.index_rank_title {
    text-align: center;
}

.index_rank_ad_container {
    display: flex;
    justify-content: center;
    align-items: Center;
    text-align: center;
    margin-top: 25px;
}

.index_rank_ad_item {
    text-align: center;
    border-right: 1px solid #E4E4E4;
    height: 250px;
}

.index_rank_ad_item:hover {
    color: white;
    background-color: #367FDB;
}

.index_rank_ad_item:last-child {
    border-right: 0;
}

.index_rank_ad_item img {
    text-align: center;
    margin-top: 10px;
    width: 80px;
}

.index_rank_ad_item_title {
    font-size: 18px;

}

.index_rank_ad_item_desc {
    font-size: 12px;
    text-align: left;
    letter-spacing: 2px
}

/*computer*/
.computer_container {
    width: 100%;
    position: relative;
    margin-bottom: 80px;
}

.computer_content_container {
   
}

.computer_content_title {
    color: #333333;
    font-weight: bold;
    font-size: 35px;
}

.computer_content_desc {
    margin-top: 25px;
    margin-bottom: 25px;
    color: #333333;
    line-height: 32px;
}

.computer_content_container button {
    background-color: #EF3B0A;
    font-weight: bold;
}

/*轮播图*/
#certify img {
    border: 3px solid #E9E9E9;
    border-radius: 5px;
}

.certify_btn {
    display: flex;
    justify-content: center;
    align-items: Center;
    height: 200px;

}

.certify_btn button {
    background-color: transparent;
    color: #EF3B0A;
}

/*分页*/
.pagination > li > a {
    margin-left: 28px;
    border-radius: 5px;
    border-color: #333333;
    color: #333333;
}

.pagination > li > a:hover {
    color: white;
    background-color: red;
    border-color: red;
}

.pagination > .active > a, .pagination > .active > span, .pagination > .active > a:hover, .pagination > .active > span:hover, .pagination > .active > a:focus, .pagination > .active > span:focus {
    color: white;
    background-color: red;
    border-color: red;
}

/*卡片反转*/
.content {
    display: flex;
    margin: 20px auto;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    /*max-width: 100%;*/
}

.heading {
    width: 100%;
    margin-left: 1rem;
    font-weight: 900;
    font-size: 1.618rem;
    text-transform: uppercase;
    letter-spacing: .1ch;
    line-height: 1;
    padding-bottom: .5em;
    margin-bottom: 1rem;
    position: relative;
}

.heading:after {
    display: block;
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #1a9be6, #1a57e6);
    bottom: 0;
}

.description {
    width: 100%;
    margin-top: 0;
    margin-left: 1rem;
    margin-bottom: 3rem;
}

.card {
    color: inherit;
    cursor: pointer;
    /*width: calc(33% - 2rem);*/
    /*min-width: calc(33% - 2rem);*/
    height: 350px;
    min-height: 350px;
    perspective: 1000px;
    margin: 1rem;
    position: relative;
}

/*@media screen and (max-width: 800px) {*/
/*    .card {*/
/*        width: calc(50% - 2rem);*/
/*    }*/
/*}*/

/*@media screen and (max-width: 500px) {*/
/*    .card {*/
/*        width: 100%;*/
/*    }*/
/*}*/

.front,
.back {
    display: flex;
    /*border-radius: 6px;*/
    background-position: center;
    background-size: cover;
    text-align: center;
    justify-content: center;
    align-items: center;
    position: absolute;
    height: 100%;
    width: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform-style: preserve-3d;
    transition: ease-in-out 600ms;
}

.front {
    background-size: cover;
    padding: 2rem;
    font-size: 1.618rem;
    font-weight: 600;
    color: #fff;
    overflow: hidden;
    font-family: Poppins, sans-serif;
}

.front:before {
    position: absolute;
    display: block;
    content: '';
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /*background: linear-gradient(135deg, #1a9be6, #1a57e6);*/
    opacity: .25;
    z-index: -1;
}

.card:hover .front {
    transform: rotateY(180deg);
}

.card:nth-child(even):hover .front {
    transform: rotateY(-180deg);
}

.back {
    background: #fff;
    transform: rotateY(-180deg);
    padding: 0 0.8em;
}

.card:hover .back {
    transform: rotateY(0deg);
}

.card:nth-child(even) .back {
    transform: rotateY(180deg);
}

.card:nth-child(even):hover .back {
    transform: rotateY(0deg);
}

.button {
    transform: translateZ(40px);
    cursor: pointer;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    font-weight: bold;
    color: #fff;
    padding: .5em 1em;
    border-radius: 100px;
    font: inherit;
    background: linear-gradient(135deg, #1a9be6, #1a57e6);
    border: none;
    position: relative;
    transform-style: preserve-3d;
    transition: 300ms ease;
}

.button:before {
    transition: 300ms ease;
    position: absolute;
    display: block;
    content: '';
    transform: translateZ(-40px);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    height: calc(100% - 20px);
    width: calc(100% - 20px);
    border-radius: 100px;
    left: 10px;
    top: 16px;
    box-shadow: 0 0 10px 10px rgba(26, 87, 230, 0.25);
    background-color: rgba(26, 87, 230, 0.25);
}

.button:hover {
    transform: translateZ(55px);
}

.button:hover:before {
    transform: translateZ(-55px);
}

.button:active {
    transform: translateZ(20px);
}

.button:active:before {
    transform: translateZ(-20px);
    top: 12px;
}