#div_btn_inner{ /*按钮部分内层，用于定位*/
            color:white; 
            text-shadow:1px 1px 1px #000;            
            width: 500px;
            padding-left: 430px;
        }

        .div_btn {
            position: fixed;
            cursor: pointer;  
            width: 42px; 
            height: 42px;
            border: 2px solid white;
            border-radius: 50%; 
            font-size: 1em;
            line-height: 40px;
            text-align: center; 
            z-index:999;
        } 
        #div_music {
            border: none;
            top: 30px; 
        }
        #div_record {
            top: 100px;
            background-color: rgba(0, 0, 0, 0.5);
        }
        #div_support{ 
            top: 170px; 
            background-color: rgba(0, 0, 0, 0.3);
        }        

        .div_music_tips{  
            position: fixed;
            top: 70px; 
            z-index:999;
        }
        .div_record_tips{  
            position: fixed;
            top: 140px;
            z-index:999;
        }

        .div_btn_big {
            position: fixed;
            cursor: pointer; 
            width: 52px; 
            background-color: rgba(112,128,144, 0.6); 
            border-radius: 5px; 
            padding: 10px 0px;
            font-size: 1.1em;
            line-height: 1.3em;
            text-align: center; 
            z-index:999;
        }
        #div_s_upload {
            top: 360px;
        }
        #div_s_sound {
            top: 440px;
        }
        #div_s_choose {
            top: 520px;
        }
        #div_s_qa {
            top: 600px;
        }

        @-webkit-keyframes music_play_rotate{
            0%{
                -webkit-transform:rotate(0deg);
            }
            100%{
                -webkit-transform:rotate(360deg);
            }
        }
        @-webkit-keyframes btn_rotate{ /*帮助按钮的动画*/
            0%  {
                -webkit-transform:rotate(0deg);
            }
            40% {
                -webkit-transform:rotate(0deg);
            }
            50% {
                -webkit-transform:rotate(30deg);
            }
            60% {
                -webkit-transform:rotate(0deg);
            }
            70% {
                -webkit-transform:rotate(30deg);
            }
            80% {
                -webkit-transform:rotate(0deg);
            }
            100% {
                -webkit-transform:rotate(0deg);
            }
        }