.hi_lo {
    width: 452px;
    margin: 10px auto;
    text-align: center;
    color: #8895BB;
    font-family: sans-serif;
}
.hi_lo .card {
    width: 100px;
    height: 150px;
    background-color: #C3C9DC;
    border-radius: 15px;
    text-align: center;
    line-height: 130px;
    border: 4px solid;
    font-size: 40px;
    display: inline-block;
}
.hi_lo .arrow-box {
    display: inline-block;
    width: 55px;
    vertical-align: top;
    padding-top: 30px;
    margin: 0 30px 0;
    font-size: 30px;
}
.hi_lo .higher {
    width: 0;
    height: 0;
    border-left: 30px solid transparent;
    border-right: 30px solid transparent;
    border-bottom: 50px solid;
    color: #C3C9DC;
}
.hi_lo .lower {
    width: 0;
    height: 0;
    border-left: 30px solid transparent;
    border-right: 30px solid transparent;
    border-top: 50px solid;
    color: #C3C9DC;
}
.hi_lo .higher:hover, .hi_lo .lower:hover {
    color: #8895BB;
    cursor: pointer;
}
.hidden { opacity: 0; }