.OI {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: block !important;
    position: fixed;
    z-index: 99999999;
    top: 0;
    left: 0;
}

.OI button {
    padding: 0;
    margin: 0;
}

.OI_shade {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: #000000;
    color: #ffffff;
    opacity: 0.5;
    filter: alpha(opacity=50);
    z-index: 99990;
}

.OI_operate .c {
    position: absolute;
    bottom: 30px;
    width: 180px;
    left: 0;
    right: 0;
    margin: auto;
    z-index: 99992;
    font-size: 0;
}

.OI_operate .l,
.OI_operate .r {
    position: absolute;
    top: 50%;
    bottom: 50%;
    margin-top: -25px;
    z-index: 99992;
}

.OI_operate .l {
    left: 30px;
}

.OI_operate .r {
    right: 30px;
}

.OI_operate img {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    cursor: move;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
    z-index: 99991;
}

.OI_operate .rt.OI_btn.btn {
    position: absolute;
    right: 0;
    top: 0;
    z-index: 99992;
    background: transparent;
    cursor: pointer;
    border: none;
}

.OI_operate .btn.OI_page {
    display: inline-block;
    width: 50px;
    height: 50px;
    padding: 0;
    margin: 0;
    border-radius: 50%;
    text-align: center;
    color: #FFFFFF;
    background: #292929;
    border: none;
    cursor: pointer;
    outline: none;
}

.OI_operate .btn.OI_page i {
    vertical-align: middle;
}

.OI_operate .btn.OI_page.active,
.OI_operate .btn.OI_page:hover {
    background: #4ea0f4;
    -webkit-transition: background 0.3s ease;
    -moz-transition: background 0.3s ease;
    -ms-transition: background 0.3s ease;
    -o-transition: background 0.3s ease;
    transition: background 0.3s ease;
}

.OI_operate .btn.OI_btn {
    padding: 0;
    margin: 0;
    width: 45px;
    height: 45px;
    line-height: 45px;
    text-align: center;
    background: #181818;
    color: #FFFFFF;
    border: none;
    position: relative;
    z-index: 9;
    cursor: pointer;
}

.OI_operate .btn.OI_btn:hover:before,
.btn.OI_btn.active:before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 38px;
    height: 38px;
    line-height: 38px;
    background: #303030;
    z-index: -9;
}

.OI_operate .btn.OI_btn i {
    font-size: 20px;
    vertical-align: middle;
}