body {
background: rgba(12, 100, 129, 1) url('https://img2018.cnblogs.com/blog/1400642/201905/1400642-20190510101626650-652570916.jpg') fixed no-repeat; //修改背景图片
background-position: 50% 5%; 
background-size: cover;
}

.day{
background: rgba(255, 255, 255, 0.3);
}
.header{
background: rgba(255, 255, 255, 0);
height: 100px;
width: 1300px;
//opacity:0.5;
}
.headerText{
text-align:left;
float:left;
padding-left: 50px;
}
#main{
width: 1300px;
}
#mytopmenu{
background-image: url();
width: 1060px;
}
#leftcontent{
//float:none;
background: rgba(255, 255, 255, 0);
}
#leftcontentcontainer{
background: rgba(255, 255, 255, 0.3);
}
#centercontent{
width: 1060px;
background: rgba(255, 255, 255, 0.3);
}
.entrylist{
background: rgba(255, 255, 255, 0.3);
}
.post,.gallery,.feedbackItem,.feedbackListSubtitle,.comment_textarea{
background: rgba(255, 255, 255, 0.3) ;
}

/* 定制公告栏时钟位置 */
#clockdiv {
    /* left, center, right */
    text-align: center;
}