/* 帮助遮罩层 */
main .help_box {
    width: 100%;
    height: calc(100% - 100px);
    background: rgba(0, 0, 0, 0.4);
    color: #ffffff;
    font-size: 12px;
    position: fixed;
    top: 50px;
    left: 0px;
    z-index: 101;
    display: none;
}

main .help_box::before {
    content: '';
    width: 100%;
    height: 50px;
    background: transparent;
    position: fixed;
    top: 0px;
    left: 0px;
    z-index: 101;
}

main .help_box::after {
    content: '';
    width: 100%;
    height: 50px;
    background: transparent;
    position: fixed;
    bottom: 0px;
    left: 0px;
    z-index: 101;
}

main .help_box .help_close_btn {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 10px 20px;
    border-radius: 40px;
    border: 1px solid #ffffff;
    cursor: pointer;
}

main .help_box .icon_help_help {
    position: absolute;
    top: 30px;
    right: 160px;
}

main .help_box .icon_help_help::before {
    content: '';
    height: 20px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    top: -30px;
    right: 5px;
}

main .help_box .icon_help_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -12px;
    right: 1px;
}

main .help_box .icon_zoom_help {
    position: absolute;
    top: 60px;
    right: 125px;
}

main .help_box .icon_zoom_help::before {
    content: '';
    height: 50px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    top: -60px;
    right: 5px;
}

main .help_box .icon_zoom_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -12px;
    right: 1px;
}

main .help_box .icon_play_help {
    position: absolute;
    top: 90px;
    right: 90px;
}

main .help_box .icon_play_help::before {
    content: '';
    height: 80px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    top: -90px;
    right: 5px;
}

main .help_box .icon_play_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -12px;
    right: 1px;
}

main .help_box .icon_sound_help {
    position: absolute;
    top: 120px;
    right: 55px;
}

main .help_box .icon_sound_help::before {
    content: '';
    height: 110px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    top: -120px;
    right: 5px;
}

main .help_box .icon_sound_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -12px;
    right: 1px;
}

main .help_box .icon_full_help {
    position: absolute;
    top: 150px;
    right: 20px;
}

main .help_box .icon_full_help::before {
    content: '';
    height: 140px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    top: -150px;
    right: 5px;
}

main .help_box .icon_full_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -12px;
    right: 1px;
}

main .help_box .icon_catalogue_help {
    position: absolute;
    bottom: 30px;
    left: calc(50% - 170px);
}

main .help_box .icon_catalogue_help::before {
    content: '';
    height: 20px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -30px;
    right: 5px;
}

main .help_box .icon_catalogue_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    right: 1px;
}

main .help_box .icon_left_2_help {
    position: absolute;
    bottom: 60px;
    left: calc(50% - 130px);
}

main .help_box .icon_left_2_help::before {
    content: '';
    height: 50px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -60px;
    right: 4px;
}

main .help_box .icon_left_2_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    right: 1px;
}

main .help_box .icon_left_help {
    position: absolute;
    bottom: 90px;
    left: calc(50% - 90px);
}

main .help_box .icon_left_help::before {
    content: '';
    height: 80px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -90px;
    right: 4px;
}

main .help_box .icon_left_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    right: 1px;
}

main .help_box .page_number_input_help {
    position: absolute;
    bottom: 150px;
    left: calc(50% - 45px);
}

main .help_box .page_number_input_help::before {
    content: '';
    height: 140px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -150px;
    right: calc(50% - 1px);
}

main .help_box .page_number_input_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    right: calc(50% - 4px);
}

main .help_box .icon_right_help {
    position: absolute;
    bottom: 90px;
    right: calc(50% - 90px);
}

main .help_box .icon_right_help::before {
    content: '';
    height: 80px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -90px;
    left: 4px;
}

main .help_box .icon_right_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    left: 1px;
}

main .help_box .icon_right_2_help {
    position: absolute;
    bottom: 60px;
    right: calc(50% - 140px);
}

main .help_box .icon_right_2_help::before {
    content: '';
    height: 50px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -60px;
    left: 4px;
}

main .help_box .icon_right_2_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    left: 1px;
}


main .help_box .icon_more_help {
    position: absolute;
    bottom: 30px;
    right: calc(50% - 182px);
}

main .help_box .icon_more_help::before {
    content: '';
    height: 20px;
    width: 1px;
    background: #ffffff;
    position: absolute;
    bottom: -30px;
    left: 5px;
}

main .help_box .icon_more_help::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    bottom: -12px;
    left: 1px;
}