body {
    font-size: 12px;
    line-height: 150%;
    text-align: center
}

.chess_box,
.menu_dy,
.menu_qj {
    display: none
}

.menu_box {
    display: none1;
    width: 316px;
    height: 232px;
    padding-top: 190px;
    background: #2b1b0769;
    margin: 60px auto 0;
}

.menu_box button {
    width: 214px;
    height: 46px;
    text-align: center;
    line-height: 46px;
    background: #FFA433;
    display: block;
    margin: 10px 0 10px 45px;
    font: normal 18px/46px "微软雅黑";
    color: #31190d;
    cursor: pointer;
}

.menu_box button:hover {
    background: #31190d;
    color: #FFA433;
}

.menu_info {
    background: #463521;
    color: #FFF;
    padding: 5px 10px;
    line-height: 190%;
    text-align: left;
    width: 194px;
    margin: 10px 0 10px 45px;
}

.menu_fh {
    width: 14px;
    height: 14px;
    float: right;
    cursor: pointer
}

/* 先手/后手选择区域样式 */
.player_side_selection {
    margin-bottom: 15px;
    padding: 5px;
    border-bottom: 1px solid #5a4632;
}

.player_side_text {
    margin-top: 5px;
    font-weight: bold;
    color: #FFA433;
}

h4 {
    margin: 10px 0 5px;
    color: #FFA433;
}

.bn_box input {
    font: normal 14px/46px "微软雅黑";
    margin: 3px 5px 0;
    padding: 2px;
    width: 100px
}