/* =======================================================
* #sub_main
* ======================================================= */
#sub_main .sub_bg {
  background: url(../images/bg_social.jpg) no-repeat center/cover;
}

/* =======================================================
* #action
* ======================================================= */
.action_block {
  margin-bottom: 100px;
}

.action_block img {
  margin: 30px auto;
  width: 600px;
}

@media screen and (max-width:768px) {
  .action_block {
    margin-bottom: 50px;
  }

  #action h2 {
    font-size: 2.2rem;
  }

  #action h2::before {
    top: 19px;
  }

  .action_block img {
    margin: 10px auto;
  }
}