#intro {
  background-image: url(../img/sub/guide/bg.jpg);
}

/* ----- content start ----- */
#content .imgs {
  width: 100%;
  overflow: hidden;
}

#con .first {
  margin-bottom: 100px;
}

#con .text_box {
  width: 100%;
  font-size: 2rem;
}

#con .text_box .color {
  color: #ff5050;
  font-weight: 800;
}

#con .text_box .bold {
  font-weight: 800;
}

#con button {
  display: block;
  float: right;
  width: 300px;
  height: 60px;
  margin-top: 50px;
  line-height: 60px;
  border: 1px solid #ccc;
  background-color: transparent;
}

#con button a {
  display: block;
  font-size: 18px;
  color: #999;
  font-weight: 600;
}

#con button:hover {
  background-color: #555;
  border: 1px solid #555;
  transition: all 0.3s;
}

#con button a:hover {
  color: #fff;
  transition: all 0.3s;
}

.con_bg {
  display: block;
  width: 100%;
  height: 300px;
  background-image: url(../img/sub/guide/period.jpg);
  background-attachment: fixed;
  background-position: center 25%;
  opacity: 0.8;
}

@media screen and (max-width:720px) {
  #con .text_box {
    font-size: 1.8rem;
    line-height: 2.4rem;
  }

  #con .first {
    margin-bottom: 80px;
  }
}

@media screen and (max-width:520px) {
  #con .text_box {
    font-size: 1.6rem;
    line-height: 2rem;
  }

  #con .first {
    margin-bottom: 50px;
  }

  #con button {
    height: 50px;
    line-height: 50px;
    float: none;
    margin: auto;
    margin-top: 30px;
  }

  #con button a {
    font-size: 1.6rem;
  }
}