* {
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", sans-serif;
  line-height: 1.6;
  background: #f8f8f8;
  color: #333;
  word-wrap: break-word;
}

html {
  font-size: 100%;
  line-height: 1.5;
  color: #383838;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: 1em;
}

h1 {
  font-size: 36px;
  line-height: 1.2;
} /* 48px */

h2 {
  font-size: 27px;
  line-height: 1.5;
} /* 48px */

h3 {
  font-size: 24px;
  line-height: 1.5;
  letter-spacing: 0.1em;
} /* 24px */

ul,
ol {
  list-style: none;
}
img {
  vertical-align: middle;
  max-width: 100%;
  height: auto;
  margin-bottom: 0;
  padding-bottom: 0;
}
figure {
  margin-bottom: 0;
  padding-bottom: 0;
}
p {
  line-height: 2em;
  margin-bottom: 1em;
}

body {
  font-family: "游ゴシック", YuGothic, "Hiragino Kaku Gothic ProN",
    "Hiragino Kaku Gothic Pro", "ＭＳ ゴシック", sans-serif;
  font-family: "zen-maru-gothic", sans-serif;
  font-weight: 500;
  font-style: normal;
}

a {
  text-decoration: none;
  color: #383838;
  transition: 0.4s ease-in-out;
}

a:hover {
  opacity: 0.5;
  filter: alpha(opacity=60);
}

img {
  width: 100%;
  margin-bottom: 1em;
}

/*pc sp*/
.sp {
  display: none;
}

/* text */

.left {
  text-align: left;
}

.right {
  text-align: right;
}

.center {
  text-align: center;
}

.bold {
  font-weight: bold;
}

.small {
  font-weight: normal;
  font-size: 0.8em;
}

/*flex*/
.flex_container_sp {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  flex-wrap: wrap;
}

.flex_center {
  align-items: center;
}

.flex_re {
  flex-direction: row-reverse;
}

.flex_bottom {
  align-items: flex-end; /* 下揃え */
}

.flex_half_sp {
  width: 46%;
  margin: 2%;
  box-sizing: border-box;
  position: relative;
}

.flex_3_sp {
  width: 31%;
  margin: 1%;
  box-sizing: border-box;
}

/*header*/

header {
  background: rgb(243, 0, 0);
  padding: 1em 2em;
  color: #fff;
}

p.company {
  font-size: 0.8em;
  letter-spacing: 0.1em;
  padding-bottom: 0;
  margin-bottom: 0;
}

p.project {
  font-weight: bold;
  font-size: 1em;
}

p.capacity {
  background: white;
  border-radius: 100px;
  display: inline-block;
  color: rgb(243, 0, 0);
  font-weight: bold;
  padding: 0 2em;
  font-size: 1em;
}

header h1 {
  font-size: 6.4vw;
  margin-bottom: 0.5em;
  line-height: 1.5em;
}

header h1 span {
  font-size: 0.6em;
  padding-bottom: 2em;
}

header p.catch1 {
  margin-bottom: 0.3em;
  font-weight: bold;
  font-size: 2vh;
}

header p.bg_catch {
  background: white;
  color: rgb(243, 0, 0);
  display: inline-block;
  padding-left: 1em;
  padding-right: 1em;
  font-weight: bold;
  margin-bottom: 4em;
}

header p.place {
  font-size: 0.8em;
  font-weight: bold;
}

.header_info {
  padding-top: 6em;
  padding-bottom: 10em;
}

.date p {
  font-family: "din-condensed", sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 13vw;
  line-height: 1em;
  margin-bottom: 0;
}

.date {
  max-width: 60vw;
  margin-bottom: 1em;
}

.flex_date_left {
  margin-right: 3%;
  box-sizing: border-box;
}

.flex_date_right {
  font-size: 1em;
  width: 40%;
  box-sizing: border-box;
}

.flex_date_right p {
  font-size: 5vw;
}

p.free {
  position: absolute;
  top: 1em;
  right: 1em;
  width: 100px;
  height: 100px;
  border: 2px solid #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 20px;
  font-weight: bold;
  line-height: 1.2;
  z-index: 1000;
  animation: swing 2s infinite ease-in-out;
}

/* スムーズな揺れ（sin波のような動き） */
@keyframes swing {
  0% {
    transform: rotate(20deg);
  }
  50% {
    transform: rotate(35deg);
  }
  100% {
    transform: rotate(20deg);
  }
}

/*main*/

section {
  padding: 5em 2em 5em 2em;
}

section h2 {
  line-height: 1.2em;
}

section p {
  font-size: 0.9em;
  line-height: 1.7em;
}

.box {
  padding-top: 3em;
  padding-bottom: 5em;
}

.box h2 {
  font-size: 1.65em;
}

.box p {
  line-height: 1.8em;
}

p.catch {
  font-size: 1.2em;
  font-weight: bold;
  margin-bottom: 0.5em;
}

.contents {
  padding: 5em 2em 5em 2em;
  background: rgb(243, 0, 0);
  color: #fff;
}

.contents_box {
  border-top: 1px solid #fff;
  border-bottom: 1px solid #fff;
  padding-top: 2em;
  margin-bottom: 5em;
}

.contents img {
  margin-bottom: 1.5em;
}

.contents h3 {
  margin-bottom: 0.5em;
  border-bottom: dotted 1px #fff;
  padding-bottom: 0.3em;
  line-height: 1em;
}

.contents h4 {
  font-size: 1.05em;
}

.contents h3 span {
  font-family: "din-condensed", sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 2em;
  margin-right: 0.2em;
}

.contents p {
  margin-bottom: 3em;
}

.contents table {
  text-align: left;
}

.contents table th {
  white-space: nowrap;
  vertical-align: top;
}

.lecturer {
  padding-bottom: 0;
  position: relative;
  top: 2.7em;
  z-index: -1;
}

.lecturer h2 {
  background: black;
  color: #fff;
  display: inline-block;
  font-size: 1.1em;
  padding: 0.3em 1em;
  margin-bottom: 0.5em;
}

.lecturer h3 {
  font-size: 1.2em;
  margin-bottom: 0.1em;
}

.lecturer p {
  line-height: 1.8em;
}

.lecturer p.name {
  font-size: 1.2em;
  font-weight: bold;
}

.lecturer p.name span {
  font-size: 0.8em;
  margin-right: 1em;
}

.image-placeholder {
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}

p.cta-button {
  background: #ff8000;
  color: #fff;
  text-align: center;
  font-size: 1.3em;
  width: 320px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 100px;
  position: fixed;
  bottom: 0em;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2);
  z-index: 999;
  overflow: hidden; /* ✨光エフェクトをはみ出させない */
}

p.cta-button a {
  color: #fff;
  display: block;
  padding: 0.3em 1em;
  position: relative;
  z-index: 1;
}
p.cta-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.4) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-20deg);
  animation: shine 1.8s ease-out 0.5s 1; /* ← ここで1回だけ光る設定 */
  z-index: 0;
}

/* ✨キラリ動作アニメーション */
@keyframes shine {
  0% {
    left: -75%;
  }
  100% {
    left: 125%;
  }
}

footer {
  background: rgb(243, 0, 0);
  color: #fff;
  margin-bottom: 0;
  padding: 5em 2em 3em 2em;
  text-align: center;
}

footer h2 {
  font-size: 1.2em;
}

footer p {
  line-height: 1.5em;
}

.sns {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  flex-wrap: wrap;
  max-width: 250px;
  margin: 2em auto;
  justify-content: center;
}

.sns figure {
  width: 15%;
  margin: 9%;
}

ul.sns li img {
  width: 100%;
}

@media screen and (min-width: 768px) {
  section {
    padding: 5em 8em 5em 8em;
  }

  p.company {
    font-size: 1em;
  }

  p.project {
    font-weight: bold;
    font-size: 1.3em;
  }

  header p.catch1 {
    font-size: 3vh;
  }

  header h1 {
    font-size: 7vw;
  }
  header p.bg_catch {
    font-size: 3vh;
  }

  header p.place {
    font-size: 1.1em;
    font-weight: bold;
  }

  .header_info {
    padding-top: 3em;
  }

  header p.bg_catch {
    margin-bottom: 3em;
  }

  .date p {
    font-family: "din-condensed", sans-serif;
    font-weight: 400;
    font-style: normal;
    font-size: 10vw;
    line-height: 1em;
    margin-bottom: 0;
  }

  .date {
    max-width: 70vw;
  }

  .date p {
    font-size: 13vw;
  }
  .date {
    max-width: 60vw;
    margin-bottom: 1em;
  }

  .flex_date_left {
    margin-right: 3%;
  }

  .flex_date_right {
    width: 40%;
  }

  .flex_date_right p {
    font-size: 5vw;
  }

  .flex_date_right p {
    font-size: 5vw;
  }
  p.free {
    width: 150px;
    height: 150px;
    font-size: 40px;
  }

  /*main*/
  section {
    margin-left: 0em;
    margin-right: 0em;
    padding: 0;
    padding: 5em 3em 5em 3em;
  }

  .contents {
    margin-left: 0em;
    margin-right: 0em;
  }

  .box {
  }

  section h2 {
    font-size: 2.5em;
    margin-bottom: 0.2em;
  }

  section h3 {
    font-size: 1.8em;
  }

  section.contents h4 {
    font-size: 1.3em;
  }

  section p,
  section table {
    font-size: 1.1em;
  }
  section.contents .flex_right_pc {
    margin-bottom: 5em;
  }

  section.contents img {
    margin-bottom: 3em;
  }

  p.catch {
    font-size: 1.5em;
    line-height: 1.4em;
  }

  .box h2 {
    font-size: 2.7em;
  }

  .box img {
    margin-top: 1em;
  }

  .contents_inner,
  .lecture {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .image-placeholder {
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
  }

  .lecturer h3 {
    font-size: 1.4em;
    margin-bottom: 0.1em;
  }

  .lecturer p.name {
    font-size: 1.3em;
  }

  /*footer*/
  footer {
    padding-left: 8em;
    padding-right: 8em;
  }

  footer h2 {
    font-size: 1.5em;
    letter-spacing: 0.1em;
  }

  footer p {
    line-height: 2em;
  }
}

@media screen and (min-width: 1024px) {
  /*flex*/
  .flex_container_pc {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    flex-wrap: wrap;
  }

  .flex_half_pc {
    width: 46%;
    margin: 2%;
    box-sizing: border-box;
    position: relative;
  }

  .flex_left_pc {
    width: 36%;
    margin: 2%;
    box-sizing: border-box;
    position: relative;
  }
  .flex_right_pc {
    width: 56%;
    margin: 2%;
    box-sizing: border-box;
    position: relative;
  }

  .flex_3_pc {
    width: 29%;
    margin: 2%;
    box-sizing: border-box;
    position: relative;
  }
  /*header*/
  header h1 {
    font-size: 5.5vw;
    margin-bottom: 0.2em;
  }

  .header_info {
    padding-top: 2em;
  }

  p.free {
    width: 210px;
    height: 210px;
    font-size: 50px;
  }

  /*main*/

  .contents_inner,
  .lecture {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  section.contents .flex_right_pc {
    margin-bottom: 0em;
  }

  .lecturer {
    position: static;
  }

  p.cta-button {
    font-size: 1.7em;
    width: 400px;
  }

  section table {
    font-size: 1.6em;
  }
}

@media screen and (min-width: 1440px) {
  /*header*/
  header p.catch1 {
    font-size: 1.8em;
  }

  header h1 {
    font-size: 4.5em;
    margin-bottom: 0.2em;
  }

  header p.bg_catch {
    font-size: 1.8em;
    margin-bottom: 1em;
  }
  .header_inner {
    max-width: 1300px;
    margin-left: auto;
    margin-right: auto;
  }

  .header_info {
    padding-top: 2em;
  }

  p.free {
    top: 1em;
    right: 2em;
  }

  .date {
    max-width: 700px;
  }

  .date p {
    font-size: 8em;
  }

  .flex_date_right p {
    font-size: 3em;
  }

  /*main*/
  section {
    margin-left: 0em;
    margin-right: 0em;
    padding: 0;
    padding: 5em 3em 5em 3em;
  }

  .contents_inner {
    padding: 5em 3em 5em 3em;
  }

  section p {
    font-size: 1.3em;
  }
  p.catch {
    font-size: 2.5em;
  }
  .box h2 {
    font-size: 3.5em;
  }

  .contents h3 {
    font-size: 2.5em;
  }

  .contents .contents_box h4 {
    font-size: 1.8em;
  }

  .lecturer h3 {
    font-size: 1.8em;
  }

  .lecturer p.name {
    font-size: 1.7em;
  }

  /*footer*/
  footer h2 {
    font-size: 2em;
  }
}

/*animation*/
.animation {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* アクティブ時に表示 */
.animation.active {
  opacity: 1;
  transform: translateY(0);
}

.blur {
  opacity: 0;
  filter: blur(10px);
  transition: opacity 1s ease-out, filter 1s ease-out;
}

.blur.active {
  opacity: 1;
  filter: blur(0);
}