@charset "utf-8";
*{
  margin:0;
  padding: 0;
}

html{
  font-size: 16px;
  font-family: 游ゴシック体, 'Yu Gothic', YuGothic, 'ヒラギノ角ゴシック Pro', 'Hiragino Kaku Gothic Pro', メイリオ, Meiryo, 'ＭＳ Ｐゴシック', 'MS PGothic', sans-serif;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

header {
  width: 100%;
  height: 150px;
  position: relative;
  background: #436798;
}

main {
  width: 800px;
  margin: 0 auto;
  margin-top: 60px;
  margin-bottom: 80px;
}

.header__ttl {
  line-height: 150px;
  font-size: 2.5rem;
  color: #fff;
  text-align: center;
  font-weight: 500;
}

.dl__list {
  margin-bottom: 20px;
}

.dl__ttl {
  font-size: 1rem;
  color: #000;
  font-weight: 500;
}

.dl__subttl {
  display: block;
  font-size: 24px;
  font-weight: 600;
  color: #233c5d;
  text-align: center;
  margin-bottom: 16px;
}

.dl__acmenu--2020,
.dl__acmenu--2021,
.dl__acmenu--2022,
.dl__acmenu--2023 {
  display: block;
  position: relative;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(178, 203, 214, 0.4);
  border-radius: 10px;
  padding: 20px;
  width: 100%;
  margin-bottom: 20px;
  box-sizing: border-box;
}

.dl__wrap {
  display: block;
  position: relative;
  padding: 20px;
  width: 100%;
  border-bottom: 1px solid #efefef;
  box-sizing: border-box;
}

.dl__inner--2020,
.dl__inner--2021,
.dl__inner--2022,
.dl__inner--2023 {
  display: none;
  position: relative;
}

.dl__acmenu--2020:after,
.dl__acmenu--2021:after,
.dl__acmenu--2022:after,
.dl__acmenu--2023:after {
  content: "";
  display: inline-block;
  position: absolute;
  top: 34px;
  right: 30px;
  width: 10px;
  height: 10px;
  border-right: 3px solid #c5c5c5;
  border-bottom: 3px solid #c5c5c5;
  transform: translateY(-50%) rotate(45deg);
  transition: .3s;
}

.dl__acmenu--2020.open:after,
.dl__acmenu--2021.open:after,
.dl__acmenu--2022.open:after,
.dl__acmenu--2023.open:after {
  transform: rotate(225deg);
}

.dl__btn {
  display: inline-block;
  position: absolute;
  top: 20px;
  right: 20px;
  width: 200px;
  height: 45px;
  line-height: 45px;
  text-align: center;
  color: #fff;
  background: #dc5125;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  transition: 0.3s;
  border: 2px solid #dc5125;
  box-sizing: border-box;
}

.dl__btn:link, .dl__btn:visited {
  text-decoration: none;
  color: #fff;
}

.dl__btn:hover {
  color: #dc5125;
  background: #fff;
  border: 2px solid #dc5125;
}

.l_movie_thumb {
  margin-bottom: 40px;
}

.l_movie_thumb iframe {
  display: block;
  width: 640px;
  height: 360px;
  margin: 0 auto;
}

@media screen and (max-width:768px) {

header {
  width: 100%;
  height: 100px;
  position: relative;
  background: #436798;
}

.header__ttl {
  line-height: 100px;
  font-size: 1.4rem;
  color: #fff;
  text-align: center;
  font-weight: 500;
}

main {
  width: 90%;
  margin: 0 auto;
  margin-top: 40px;
  margin-bottom: 60px;
}

.dl__wrap {
  display: block;
  position: relative;
  padding: 20px;
  width: 100%;
  border-bottom: 1px solid #efefef;
  box-sizing: border-box;
}

.dl__ttl {
  font-size: 1rem;
  color: #000;
  font-weight: 500;
  text-align: center;
  margin-bottom: 10px;
}

.dl__subttl {
  display: block;
  font-size: 20px;
  font-weight: 600;
  color: #233c5d;
  text-align: left;
  margin-bottom: 10px;
}

.dl__btn {
  display: block;
  position: relative;
  top: 0;
  right: 0;
  width: 200px;
  margin: 0 auto;
}

.dl__acmenu--2020,
.dl__acmenu--2021,
.dl__acmenu--2022,
.dl__acmenu--2023 {
  display: block;
  position: relative;
  width: 100%;
  margin-bottom: 20px;
  box-sizing: border-box;
}

.l_movie_thumb iframe {
  display: block;
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

}