.big_in_centr {
    max-width: 100%;
    margin: 20px auto;
    display: block;
}
.user_guide {
    border: 1px solid #818181;
    background-color: #ececec;
    border-radius: 5px;
    margin: 20px auto;
    position: relative;
    padding: 20px 20px 20px 45px;
}
.user_guide .number {
    position: absolute;
    color: white;
    font-family: arial;
    font-weight: bold;
    font-size: 18px;
    width: 25px;
    border-radius: 3px;
    background-image: linear-gradient(to top, #32005f 0%, #6e00ce 100%);
    left: 10px;
    text-align: center;
    padding: 2px 0;
}
.user_guide .title {
    font-size: 17pt;
    font-family: arial;
    font-weight: bold;
    margin-bottom: 20px;
}
.user_guide p:first-of-type {
    margin-top: 0;
}
.user_guide p:last-of-type {
    margin-bottom: 0;
}
.user_guide .right_img {
    float: right;
    margin-left: 25px;
    margin-bottom: 15px;
    clear: both;
    max-width: 60%;
}
.to_top {
    position: fixed;
    right: calc(50% - 650px);
    bottom: 100px;
    background-color: #000000a8;
    border-radius: 50%;
    width: 73px;
    cursor: pointer;
}
.to_top img {
    display: block;
    margin: auto;
}
#guide-menu {
    position: relative;
    max-width: 820px;
    margin: auto;
}
.move_to {
    position: absolute;
    height: 25px;
    width: 25px;
    cursor: pointer;
}
@media screen and (max-width: 1330px) {
    .to_top {
        right: 10px;
    }
}
.shortcuts {
    font-family: arial;
    font-size: 13pt;
    border: 5px solid #999999;
    background-color: white;
    border-spacing: 0;
    margin: 20px auto 0 auto;
}
.shortcuts tr td:first-child {
    padding: 15px 0;
    width: 300px;
    text-indent: 20px;
}
.shortcuts td {
    padding: 15px 0;
    width: 220px;
}
@media (max-width: 992px) {
    .move_to {
        display: none;
    }
}
@media (max-width: 768px) {
    .user_guide {
        padding: 15px 15px 15px 40px;
    }
    .user_guide .number {
        font-size: 16px;
        width: 22px;
        left: 8px;
    }
    .user_guide .title {
        font-size: 15pt;
        margin-bottom: 15px;
    }
    .user_guide .right_img {
        margin-left: 10px;
        margin-bottom: 0;
    }
    .to_top {
        bottom: 20px;
    }
    .shortcuts {
        font-size: 12pt;
    }
    .shortcuts tr td:first-child {
        padding: 7px;
        width: 240px;
        text-indent: 0;
    }
    .shortcuts td {
        padding: 7px 3px;
        width: 200px;
    }
}
@media (max-width: 425px) {
    .shortcuts {
        font-size: 11pt;
    }
    .shortcuts tr td:first-child {
        padding: 7px 3px;
    }
    .user_guide .title {
        font-size: 13pt;
        margin-bottom: 5px;
    }
    .user_guide .right_img {
        max-width: 50%;
    }
}