header#page_background {
  background: url(../img/joy/event_background.jpg) no-repeat center center;
  background-size: cover;
}
header#page_background::after {
  content: "EVENT";
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  letter-spacing: 0.05em;
  font-size: 4em;
  font-weight: bold;
}

header#page_background > nav.joy_nav > ul > li > a[href="joy_event.html"] {
  font-weight: bold;
  color: black;
  border-bottom: 3px solid black;
}

section.joy_event {
  width: 100%;
  overflow: hidden;
  margin: 3% 0;
}
section.joy_event > article.event_main {
  width: 70%;
  margin: 3% auto;
}
section.joy_event > article.event_main > p {
  width: 85%;
  margin: 3% auto;
  font-size: 3em;
  color: #777;
}
section.joy_event > article.event_main > p > span {
  color: #000;
  font-weight: bold;
}
section.joy_event > article.event_main > ul {
  width: 100%;
  overflow: hidden;
}

article.event_main > ul > li {
  width: 27.333%;
  margin: 3%;
  float: left;
}
article.event_main > ul > li > a {
  width: 100%;
  display: block;
}
article.event_main > ul > li > a > img {
  width: 100%;
  vertical-align: bottom;
}

section.joy_event > article.event_list {
  width: 60%;
  margin: 2% auto;
  overflow: hidden;
  border-top: 2px solid #666;
  border-bottom: 2px solid #666;
  padding: 1% 0;
}

article.event_list > div {
  width: 100%;
  overflow: hidden;
}
article.event_list > div > a {
  display: block;
  float: left;
  width: 50%;
  margin-right: 2.5%;
}
article.event_list > div > a > img {
  width: 100%;
}

article.event_list > div > div {
  width: 45%;
  float: left;
  margin-left: 2.5%;
  font-size: 1.1em;
}

article.event_list > div > div > a {
  font-size: 1.3em;
  font-weight: bold;
  color: black;
  line-height: 2.5em;
}
article.event_list > div > div > p {
  font-size: 1em;
  color: #666;
}
article.event_list > div > div > p > span {
  visibility: hidden;
}