.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../img/background/116763500_p0.jpg') no-repeat center center fixed;
    background-size: cover;
	/* 使用滤镜来模糊背景 */
	-webkit-filter: blur(5px);
	filter: blur(5px);
	z-index: -1; /* 确保背景在内容之后 */
}