.top_mark {
  font-family: "Noto Serif";
  padding: 2.5rem 0;
  border-width: 0 0 0 0;
  border-style: solid;
  border-color: black;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  background-color: #000;
  color: #fff;
  font-weight: 700;
}

.title_main {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  line-height: 3rem;
}

.title-menu {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.2em;
  text-align: center;
}

.video-container {
  position: relative;
  width: 100%;
  top: 50%;
  left: 0%;
  padding-bottom: 56.25%;
  padding-top: 0px;
  height: 0;
  overflow: hidden;
}

.video-container iframe,
.video-container object,
.video-container embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

@media screen and (min-width: 768px) {
  .top_mark {
    padding: 2rem 0;
  }

  .title_main {
    font-size: 3.5rem;
    line-height: 6rem;
  }

  .title-menu {
    font-size: 1.5rem;
  }
}

.red {
  color: red;
}

.blue {
  color: blue;
}

.bold {
  font-weight: 700;
}

.underline {
  text-decoration: underline;
}

.align-right {
  text-align: right;
}

.CTA_button {
  margin: 2rem 0;
}

@media screen and (min-width:768px) {
  .pc_img-70 {
    width: 70%;
  }

  .pc_img-60 {
    width: 60%;
  }

  .pc_img-50 {
    width: 50%;
  }

  .pc_img-40 {
    width: 40%;
  }

  .CTA_button {
    margin: 4rem 0;
  }
}