#blogTitle {
    height: 200px;
    width: 850px;
    margin: 0 auto;
    clear: both;
    background: transparent url(https://dynamic-image.yesky.com/740x-/uploadImages/2017/048/58/BS7I2UDK2C11_800x1200.jpg) no-repeat top center;
    position: relative;
    background-size:100%;
    text-align: center;
    margin-bottom: 20px;
}
#topicList{width:auto !important}