html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

.app-main {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 48px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    overflow: auto;
}

.app-main .iframe-main {
    border: none;
    flex-grow: 1;
    width: 100%;
    height: 100%;
}

.index-bottom {
    position: fixed;
    top: calc(100% - 48px);
    left: 0;
    right: 0;
    bottom: 0;
    font-size: 16px;
    color: #000000;
    line-height: 24px;
    background-color: #f5f5f5;
    padding: 12px 0;
}

.index-bottom a {
    display: inline-block;
    text-decoration: none;
    height: 20px;
    line-height: 20px;
    margin-right: 10px;
}

.index-bottom a img {
    float: left;
}

.index-bottom a p {
    float: left;
    height: 20px;
    line-height: 20px;
    margin: 0 0 0 5px;
    color: #939393;
}