@media screen and (min-width: 1200px) { #top { position: fixed; width: 100vw; z-index: 1; }
  .main_box { padding-top: 76px; padding-bottom: 50px; min-height: 500px; background: url("../images/ml/n_bg.jpg") no-repeat center 76px; }
  .main_box .box_main { width: 1200px; margin: 18px auto; }
  .main_box .box_main .mu_top_btn { display: block; margin: 30px auto; width: 262px; height: 67px; background: url("../images/ml/n_btn.png") no-repeat center center; cursor: pointer; }
  .main_box .box_main.box_btn { position: relative; }
  .main_box .box_main.box_btn > .to_see_pdf { position: absolute; width: 94px; height: 36px; bottom: 20px; right: 86px; background: #037DC0; border-radius: 2px; line-height: 36px; color: #fff; text-align: center; font-size: 14px; cursor: pointer; } }
@media screen and (max-width: 1199px) { .main_box { padding-top: 13.2vw; padding-bottom: 6.667vw; min-height: 66.667vw; background: url("../images/ml/pn_bg.jpg") no-repeat center 13.2vw; background-size: 100vw; }
  .main_box .box_main { width: 100vw; margin: 2vw auto; }
  .main_box .box_main > img { width: 94.667vw; margin: 0 auto; }
  .main_box .box_main .mu_top_btn { display: block; margin: 4vw auto; width: 42.933vw; height: 12vw; background: url("../images/ml/pn_btn.png") no-repeat center center; background-size: 42.933vw; cursor: pointer; }
  .main_box .box_main.box_btn { position: relative; }
  .main_box .box_main.box_btn > .to_see_pdf { position: absolute; width: 21.333vw; height: 8vw; bottom: 9.333vw; right: 10.667vw; background: #037DC0; border-radius: 1.333vw; line-height: 8vw; color: #fff; text-align: center; font-size: 3.2vw; cursor: pointer; } }