@charset "utf-8";
/* CSS Document */
/* 水素吸入の作用 */
#sec2 {
  background-image: url("images/sec2back.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover; /* または contain、必要に応じて */
  text-align: center;
  padding: 0;
  }
#sec2 h3 {
  font-size: clamp(28px, 4vw, 34px);
  margin: 30px 0 20px 0;
  color: #fff;
  line-height: 1.2em;
  text-shadow: 3px 3px 0 #5400b3, 10px 15px 7px #280050;
}
.akudama {
  color: #c89bff;
}
.flow-text {
  font-size: clamp(28px, 4vw, 38px);
  font-family: "source-han-sans-japanese", sans-serif;
  font-weight: 700;
  font-style: normal;
  margin: -40px 0 0 0;
  padding: 0 10px 15px 0;
}
.arrow {
  margin: 40px 0 0 0;
}
.flow-card {
  background-color: rgba(255, 255, 255, 0.8);
  color: #333;
  max-width: 740px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  border: solid 2px #fff;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  padding: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}
.flow-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.flow-card img {
  width: 180px;
  height: 180px;
  margin: 20px;
}
.flow-desc {
  text-align: left;
}
.flow-desc p {
  text-indent: -1.3em; /* 最初の行を左に引っ込める */
  padding-left: 1.3em;
  font-size: 18px;
  line-height: 26px;
}
.plus {
  display: block; /* ブロック要素にすることで改行して中央揃えに */
  text-align: center; /* この行だけ中央揃え */
  font-size: 1.5em; /* 通常の3倍サイズ */
  font-weight: bold; /* 太字 */
  padding: 0px 0 0px 0;
}
@media (max-width: 600px) {
  .flow-card {
    flex-direction: column;
    text-align: center;
    margin-left: 10%;
    margin-right: 10%;
  }
  .flow-card img {
    width: 60%;
    height: auto;
    margin: 40px 0 0 0;
  }
  .flow-desc {
    padding: 15px;
  }
}