html,body{
    background: -webkit-linear-gradient(left, red , blue); /* Safari 5.1 - 6.0 */
  background: -o-linear-gradient(right, red, blue); /* Opera 11.1 - 12.0 */
  background: -moz-linear-gradient(right, red, blue); /* Firefox 3.6 - 15 */
  background: linear-gradient(to right, red , blue); /* 标准的语法 */
}

.headermaintitle{
    color: pink;
}

#blogTitle h1{
    text-align: center;
    font-size: 2em;
font-weight: bold;
}

#footer{
    color: pink;
}