.blinking1b {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
}

.blinking2a {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
}

.blinking2b {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
  -webkit-animation-delay: 0.2s;
  -moz-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

.blinking2c {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
  -webkit-animation-delay: 0.4s;
  -moz-animation-delay: 0.4s;
  animation-delay: 0.4s;
}

.blinking2c {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
  -webkit-animation-delay: 0.6s;
  -moz-animation-delay: 0.6s;
  animation-delay: 0.6s;
}

.blinking2d {
  -webkit-animation: blink 0.5s ease-in-out infinite alternate;
  -moz-animation: blink 0.5s ease-in-out infinite alternate;
  animation: blink 0.5s ease-in-out infinite alternate;
  -webkit-animation-delay: 0.8s;
  -moz-animation-delay: 0.8s;
  animation-delay: 0.8s;
}

.heading {
  font-size: 4rem;
  font-weight: bold;
}

.h_color01 {
  /* Bright Violet */
  color: #8A2BE2;
}

.h_color02 {
  /* Light Blue */
  color: #007FFF;
}

.h_color03 {
  /* Green */
  color: #008000;
}

.h_color04 {
  /* Yellow Green */
  color: #9ACD32;
}

.h_color05 {
  /* Yellow */
  color: #FFFF00;
}

.h_color06 {
  /* Orange */
  color: #FFA500;
}

.h_color07 {
  /* Red */
  color: #FF0000;
}

.heading {
  display: flex;
  justify-content: center;
}

.content {
  margin-left: auto;
  margin-right: auto;
  width: 60%;
  text-align: center;
}

.content p {
  font-size: 1.2rem;
  line-height: 1.5;
}

.checklist {
  margin-top: 3rem;
  margin-bottom: 6rem;
  margin-left: auto;
  margin-right: auto;
  width: 300px;
  border: 2px solid #9ACD32;
  background-color: #222222;
  padding: 1rem 2rem 1rem 3rem;
}

.checklist ul {
  list-style-type: circle;
  padding: 0;
  margin: 0;
  margin-top: 10px;
  text-align: left;
}

.checklist ul li {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.li-link {
  margin-top: 10px;
  font-size: 1.1rem;
}
.li-link a, .li-link a:visited, .li-link a:hover, .li-link a:active {
  color: #00cccc;
  text-decoration: underline;
}

.arrow-border {
  padding-top: 4rem;
  padding-bottom: 4rem;
}
.arrow-border2 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.arrow-border3 {
  padding-top: 18rem;
  padding-bottom: 4rem;
}
/* 昔の緑色リンクに対応 */
.green-link2 a,
.green-link2 a:link,
.green-link2 a:visited {
  color: #00FF00;
}

.go-home-text {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

/* ===============================
   Windows風「帰る」ボタン
   =============================== */

/* 1. ベース（要素の性質・サイズ） */
.go-home-button {
  display: inline-block;
  width: 120px;
  /* ← 固定幅（お好みで調整） */
  box-sizing: border-box;
  /* padding込みで幅固定 */

  padding: 4px 0;
  text-align: center;

  font-family: "MS UI Gothic", "Tahoma", "Arial", sans-serif;
  font-size: 12px;
  color: #000;
  text-decoration: none;

  cursor: default;
}

/* 2. 見た目（通常状態） */
.go-home-button {
  background-color: #d4d0c8;
  /* Win95/98グレー */

  border-top: 2px solid #ffffff;
  border-left: 2px solid #ffffff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #404040;
}

/* 3. hover（控えめ） */
.go-home-button:hover {
  background-color: #e0ddd5;
}

/* 4. active（押し込まれた状態） */
.go-home-button:active {
  border-top: 2px solid #404040;
  border-left: 2px solid #404040;
  border-right: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;

  padding-top: 5px;
  /* 押した分ズラす */
  padding-bottom: 3px;
}

/* 5. focus（キーボード操作用・当時風） */
.go-home-button:focus {
  outline: 1px dotted #000;
  outline-offset: -4px;
}