.manual nav {
    background: #ededed;
    padding: 10px;
    margin-bottom: 5px;
}
.manual nav a {
    margin-right: 15px;
    text-decoration: none;
    color: #007bff;
}

.scroll {scroll-behavior: smooth; overflow-y:scroll;height: calc(100vh - 280px);height: calc(100dvh - 280px); padding: 0 10px;}
.goup_base {
    display: flex;
    justify-content: right;
}
.goup {margin: 5px;display: none;width: 60px;height: 25px;box-sizing: border-box;background: #b1fd84;border-radius: 25px;text-align: center;letter-spacing: -1px;font-size: 85%;text-decoration: none;color: #2b00ff;opacity: 0.6;position: fixed;z-index: 1;bottom: 75px;
    transition: bottom 3s ease;}
.goup {bottom: 50px;}
.goup::before {content: "";display: block;border-top: 2px solid #1e1e1e;border-right: 2px solid #1e1e1e;width: 20%;height: 50%;top: 30%;left: 0;right: 0;margin: auto;position: absolute;transform: rotate(-45deg);}
.goup:hover {opacity: 1;}
.indent{padding-left: 20px;}