.idadrstiyjau {
 width: 100%;
  height: 100vh;
  background-image: url('../img/haikei_2.jpg')!important;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: right;
    }

.box-design17 {
  margin: 40px auto 20px;
  padding: 30px 20px 10px 20px;
  border: 2px solid #4c9ac0;
    background-color: rgba(255, 255, 255, 0.1); /* 背景色 */
  border: 1px solid rgba(255, 255, 255, 0.4); /* ボーダー */
  border-right-color: rgba(255, 255, 255, 0.2);
  border-bottom-color: rgba(255, 255, 255, 0.2);
  -webkit-backdrop-filter: blur(20px); /* ぼかしエフェクト */
  backdrop-filter: blur(20px);
  box-shadow: 0 5px 20px rgba(255, 152, 79, 0.5); /* 薄い影 */
}
.box-design17-ttl {
  background-color: #8a9b0f;
  color: #fff;
  border-radius: 100vh;
  padding: 10px 1.5em;
  margin: -55px 0 0 0;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  font-size: 20px;
  font-weight: bold;
  text-align: center;
}
.box-design17-ttl::after {
  content: '';
  position: absolute;
  bottom: -25px;
  left: 50%;
  transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  border: 15px solid transparent;
  width: 0;
  height: 0;
  border-top-color: #8a9b0f;

}