#web_bg{background-image: linear-gradient(-225deg, #CBBACC 0%, #2580B3 100%);

  background-image: linear-gradient(to top, #9890e3 0%, #b1f4cf 100%);

  background-image: linear-gradient(to top, #d9afd9 0%, #97d9e1 100%);

  background-image: linear-gradient(-225deg, #2CD8D5 0%, #C5C1FF 56%, #FFBAC3 100%);

  background-image: linear-gradient(-225deg, #5D9FFF 0%, #B8DCFF 48%, #6BBBFF 100%);

  background-image: linear-gradient(-225deg, #CBBACC 0%, #2580B3 100%);}

/* 页脚footer */
#footer {
  /* 与背景渐变效果一致*/
  background-image: linear-gradient(-225deg, #CBBACC 0%, #2580B3 100%);

  background-image: linear-gradient(to top, #9890e3 0%, #b1f4cf 100%);

  background-image: linear-gradient(to top, #d9afd9 0%, #97d9e1 100%);

  background-image: linear-gradient(-225deg, #2CD8D5 0%, #C5C1FF 56%, #FFBAC3 100%);

  background-image: linear-gradient(-225deg, #5D9FFF 0%, #B8DCFF 48%, #6BBBFF 100%);

  background-image: linear-gradient(-225deg, #CBBACC 0%, #2580B3 100%);
}

#footer:before {
  background-color: rgba(0, 0, 0, 0);
}