.dit{display: inline-table;}
.about-menu {
    width: 200px;
    border: 1px solid #ccc;
    float: left;
}
.about-menu>div{ height: 50px; line-height: 50px; text-align: center; font-weight: 500;}
.about-menu>div:hover{ background-color: #f5f5f5;}
.about-menu>div:not(:last-child){ border-bottom: 1px solid #ccc;}
.about-menu .active {
    background-color: #f5f5f5;
    color: #d12225;
    border-left: 2px solid #d12225;
}
/*text-indent: 2em;*/
.about-content{padding: 40px 20px;width:960px;font-weight: 500; border: 1px solid #ccc;margin-left: 220px; min-height: 500px; line-height: 180%; text-align: left; }
.about-content img {
    max-width: 100%;
    display: table;
    margin: 8px auto;
}