.card{
    width: 550px;
    height: 350px;
    margin: 50px auto;
    border-radius: 30px;
    background-color: #99d3e7;
    box-shadow: 0px 20px 70px 0px rgba(0, 0, 0, 0.21);
    position: relative;
    overflow: hidden;
}
.card .card_back{
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    margin-top: -139px;
    z-index: 1;
}
.card.card_back p{
    margin: 0 20px;
}
.card .card_up .img{
    position: absolute;
    width: 30%;
    height: 170px;
    z-index: 3;
    text-align: center;
    border-top-left-radius: 30px;
    border-top-right-radius: 30px;
    transition: .5s ease-in-out;
}
.card_on .card_up{
    height: 25px;
    box-shadow: 0 0 30px #cfd8dc;
}
.card .card_up .card_text{
    height:290px;
    width: 362px; /*调整滚动条位置*/
    overflow-y: scroll; /*y轴滚动条*/
    position: absolute;
    top: 14px;
    left: 188px;
    /*right: 230px;*/
    color: #011218;
    transition: .5s ease-in-out;
}

/*定义滚动条样式（高宽及背景）*/
::-webkit-scrollbar {
    width: 6px;   /* 滚动条宽度， width：对应竖滚动条的宽度  height：对应横滚动条的高度*/
    background: #007acc;
}
/*定义滚动条轨道（凹槽）样式*/
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);    /* 较少使用 */
    border-radius: 3px;
}
/*定义滑块 样式*/
::-webkit-scrollbar-thumb {
    border-radius: 3px;
    height: 100px;    /* 滚动条滑块长度 */
    background-color: #ccc;
}
.card_on .card_up .card_text{
    top: 40px;
}


.card .card_up .card_text h2{
    margin: 0;
    font-size: 25px;
    font-weight: 600;
}
.card .card_up .card_text p{
    margin: 0;
    font-size: 16px;
    color: #011218;
}

.card_on .card_up .card_add{
    transform: rotate(360deg) scale(.5);
    top: 273px;
}
.card .card_down{
    color: #fff;
    background: linear-gradient(0deg, rgba(0, 172, 238, 1) 0%, rgba(2, 126, 251, 1) 100%);
    position: absolute;
    bottom: 0px;
    width: 100%;
    height: 45px;
    z-index: 2;
    border-bottom-left-radius: 30px;
    border-bottom-right-radius: 30px;
}



.card_on .card_down{
    height: 50px;
    box-shadow: 0 0 30px cadetblue;
}
.card .card_down div{
    text-align: center;
    margin-top: 10px;
    font-size: 18px;
    color: #151b24;
}

.card .card_up .card_add i{
    color: #fff;
    font-size: 48px;
    line-height: 50px;
}


/* 未访问的链接 */
.card .card_down a:link {
    color: #FF0000;
}

/* 已访问的链接 */
.card .card_down a:visited {
    color: #00FF00;
}

/* 鼠标悬停链接 */
.card .card_down a:hover {
    color: #FF00FF;
    font-size: 15pt;
    font-weight: bold;
}

/* 已选择的链接 */
.card .card_down a:active {
    color: #0000FF;
}