@charset "utf-8";
#wakatteinai main {
  font-family: "Shippori Mincho", serif;
  font-weight: 400;
  font-style: normal;
}
/* スマホ用ページ上部へ戻るボタン */
#purchase #pageTop,
#goods_modal #pageTop {
  z-index: 99;
}
/* スマホ用フッター前マージン除去 */
#purchase ul.spFooter,
#goods_modal ul.spFooter {
  margin-top: 0;
}

/* 色指定 */
:root {
  --layout_content_width: 1080px;
  --layout_bg_expand_width: 1920px;

  --main_bg_outer: #eef3f8;
  --main_bg_inner: #ffffff;

  --wakatte_blue: #0068b7;
  --wakatte_green: #009b6b;
  --wakatte_red: #e13837;
  --wakatte_purple: #92308d;
  --wakatte_black: #031d36;
  --wakatte_navy: #002367;
  --kv_intro_rotate: -3deg;

  --yellow_marker: rgba(255, 255, 0, 0.5);
}

/* アクセシビリティ */
button:focus-visible {
  outline: 2px solid currentColor;
}

/* SPだけで改行させる */
br.sp {
  display: none;
}

/* =====================================
   Base Styles (HTML登場順)
===================================== */

/* キービジュアル */
#kv_area {
  height: 550px;
  background: conic-gradient(
    var(--wakatte_blue) 0deg 90deg,
    var(--wakatte_green) 90deg 180deg,
    var(--wakatte_red) 180deg 270deg,
    var(--wakatte_purple) 270deg 360deg
  );
}
#kv_area .kv_inner {
  width: 100%;
  margin: 0 auto;
  position: relative;
}
#kv_area .kv_inner img {
  width: 100%;
  height: auto;
  display: block;
}
.kv_intro_area {
  box-sizing: border-box;
  width: 100%;
  height: 189px;
  overflow: hidden;
  /*
  background-image: url(../images/kv_band.svg);
  background-size: 1500px auto;
  background-position: center top;
  background-repeat: no-repeat;
  */
  padding-top: 30px;
}
.kv_intro {
  width: fit-content;
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.kv_intro p {
  transform: rotate(var(--kv_intro_rotate));
  transform-origin: left top;
  font-weight: 600; /* semibold */
  color: white;
}
.kv_intro .intro_sp {
  display: none;
}
.kv_intro p.intro_weak {
  position: relative;
  z-index: 0;
  display: block;
  width: fit-content;
  font-size: 20px;
  margin: 0;
}
.kv_intro p.intro_strong {
  position: relative;
  z-index: 1;
  display: block;
  width: fit-content;
  font-size: 23px;
  margin: -0.44em 0 0 9em;
}
.kv_intro p.intro_weak::before,
.kv_intro p.intro_strong::before {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  height: 2.5em;
  box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.5);
  z-index: -1;
}
.kv_intro p.intro_weak::before {
  /* 左右に１文字ずつ余白 */
  left: -1em;
  right: -1em;
  background: linear-gradient(
    to right,
    var(--wakatte_red) 0%,
    var(--wakatte_purple) 28%,
    var(--wakatte_blue) 56.1%,
    var(--wakatte_green) 101%
  );
}
.kv_intro p.intro_strong::before {
  /* 左右に１文字ずつ余白 */
  left: -1.5em;
  right: -1em;
  background: linear-gradient(
    to right,
    var(--wakatte_purple) -0.5%,
    var(--wakatte_blue) 33%,
    var(--wakatte_green) 86.6%
  );
}
.kv_intro p .emphasis {
  display: inline;
  font-size: 40px;
  font-weight: 800; /* extrabold */
  text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.28);
  /*
  color: var(--wakatte_red);
  background-image: linear-gradient(var(--yellow_marker), var(--yellow_marker));
  background-repeat: no-repeat;
  background-size: 100% 32px;
  background-position: 0 100%;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  */
}
.kv_question {
  position: relative;
  margin: -50px auto 0 auto;
  width: 250px;
  height: 370px;
  opacity: 0;
  transform: translateY(16px);
  animation: kv-question-fade-in 900ms ease-out 1100ms forwards;
}
.kv_question img {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes kv-question-fade-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .kv_question,
  .kv_snowflake,
  .kv_zebra,
  .kv_earth,
  .kv_snowflake_balloon,
  .kv_zebra_balloon,
  .kv_earth_balloon {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

.kv_logo {
  position: absolute;
  top: 200px;
  left: 50%;
  transform: translateX(-50%);
  width: 364px;
  height: 293px;
  filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.6));
}
.kv_snowflake {
  position: absolute;
  top: 220px;
  left: calc((50% - 130px) * 151 / 410);
  width: 130px;
  height: 130px;
  opacity: 0;
  transform: translateY(16px);
  animation: kv-snowflake-fade-in 800ms ease-out 300ms forwards;
}
.kv_snowflake_balloon {
  position: absolute;
  top: 149px;
  left: calc((50% - 130px) * 151 / 410 - 40px);
  width: 208px;
  height: 66px;
  opacity: 0;
  transform: translateY(-18px);
  animation: kv-snowflake-balloon-drop 700ms ease-out 1140ms forwards;
}
.kv_zebra {
  position: absolute;
  top: 347px;
  left: -215px;
  width: 460px;
  height: 315px;
  opacity: 0;
  transform: translateY(16px);
  animation: kv-zebra-fade-in 800ms ease-out 360ms forwards;
}
.kv_zebra_balloon {
  position: absolute;
  top: 487px;
  left: 135px;
  width: 212px;
  height: 40px;
  opacity: 0;
  transform: translateX(28px);
  animation: kv-zebra-balloon-slide 700ms ease-out 1180ms forwards;
}
.kv_earth {
  position: absolute;
  top: 75px;
  right: -52px;
  width: 380px;
  height: 380px;
  opacity: 0;
  transform: translateY(16px);
  animation: kv-earth-rise-in 900ms ease-out 420ms forwards;
}
.kv_earth_balloon {
  position: absolute;
  top: 459px;
  right: 25px;
  width: 192px;
  height: 66px;
  opacity: 0;
  transform: translateY(20px);
  animation: kv-earth-balloon-rise 700ms ease-out 1220ms forwards;
}

@keyframes kv-snowflake-fade-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kv-zebra-fade-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kv-earth-rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kv-snowflake-balloon-drop {
  from {
    opacity: 0;
    transform: translateY(-18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kv-zebra-balloon-slide {
  from {
    opacity: 0;
    transform: translateX(28px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes kv-earth-balloon-rise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* メイン背景: 1920pxまでは中央背景を拡張し、それ以上は左右余白を増やす */
#content_area {
  box-sizing: border-box;
  width: 100%;
  background-color: var(--wakatte_blue);
  background-image: url(../images/bg_question.svg);
  background-size: 100px auto;
  background-repeat: repeat;
  background-position: center top;
  margin: 0 auto;
  padding: 40px;
}
.content_inner {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--layout_content_width);
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.9);
}

/* 導入 */
.intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  font-weight: 500; /* medium */
  font-size: 18px;
  padding-top: 35px;
}
.intro_stronger {
  font-size: 26px;
  font-weight: 700; /* bold */
  position: relative;
  display: inline-block;
  text-decoration: none;
}
.intro_stronger::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  height: 8px;
  /*
    Original SVG (before URL encoding):
    <svg xmlns='http://www.w3.org/2000/svg' width='24' height='8' viewBox='0 0 24 8'>
      <path d='M-1 4 C3 0 7 0 11 4 C15 8 19 8 23 4 C27 0 31 0 35 4' fill='none' stroke='#e8423d' stroke-width='2'/>
    </svg>
  */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='8' viewBox='0 0 24 8'%3E%3Cpath d='M-1 4 C3 0 7 0 11 4 C15 8 19 8 23 4 C27 0 31 0 35 4' fill='none' stroke='%23e8423d' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 24px 8px;
  background-position: left center;
  pointer-events: none;
}
.intro_subtle {
  font-size: 16px;
  font-weight: 400; /* regular */
  margin-top: 32px;
}

/* 例示 */
.example_area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  padding: 24px 0 48px;
}

.example {
  width: min(100%, 920px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.example.reverse {
  flex-direction: row-reverse;
}
.ex1_soil,
.ex2_moon,
.ex3_dream {
  position: relative;
  overflow: visible;
  flex: 0 0 auto;
  max-width: 100%;
  height: auto;
}
.ex1_soil,
.ex3_dream {
  width: 420px;
  aspect-ratio: 3 / 2;
}
.ex1_soil::before,
.ex1_soil::after {
  content: "";
  position: absolute;
  left: 42px;
  top: -64px;
  width: 78px;
  height: calc(78px * 370 / 250);
  -webkit-mask: url("../images/kv_question.svg") no-repeat center / contain;
  mask: url("../images/kv_question.svg") no-repeat center / contain;
  transform: rotate(-6.3deg);
  pointer-events: none;
}

.ex1_soil::before {
  background-color: rgba(0, 0, 0, 0.3);
  transform: translate(4px, 5px) rotate(-6.3deg);
  filter: blur(3px);
  opacity: 0.4;
}

.ex1_soil::after {
  background-color: var(--wakatte_green);
}
.ex2_moon {
  width: 280px;
  aspect-ratio: 1;
}
.ex2_moon::before,
.ex2_moon::after {
  content: "";
  position: absolute;
  left: 261px;
  top: -17px;
  width: 48px;
  height: calc(48px * 370 / 250);
  -webkit-mask: url("../images/kv_question.svg") no-repeat center / contain;
  mask: url("../images/kv_question.svg") no-repeat center / contain;
  pointer-events: none;
}

.ex2_moon::before {
  background-color: rgba(0, 0, 0, 0.3);
  transform: translate(4px, 5px) rotate(23deg);
  filter: blur(3px);
  opacity: 0.4;
}

.ex2_moon::after {
  background-color: var(--wakatte_red);
  transform: rotate(23deg);
}
.ex3_dream::before,
.ex3_dream::after {
  content: "";
  position: absolute;
  left: 282px;
  top: 251px;
  width: 46px;
  height: calc(46px * 370 / 250);
  -webkit-mask: url("../images/kv_question.svg") no-repeat center / contain;
  mask: url("../images/kv_question.svg") no-repeat center / contain;
  pointer-events: none;
}

.ex3_dream::before {
  background-color: rgba(0, 0, 0, 0.3);
  transform: translate(4px, 5px) rotate(10deg);
  filter: blur(3px);
  opacity: 0.4;
}

.ex3_dream::after {
  background-color: var(--wakatte_purple);
  transform: rotate(10deg);
}
.ex1_soil img,
.ex2_moon img,
.ex3_dream img {
  width: 100%;
  height: auto;
  display: block;
}

html.js-enabled .ex1_soil,
html.js-enabled .ex2_moon,
html.js-enabled .ex3_dream {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 700ms ease-out,
    transform 700ms ease-out;
  will-change: opacity, transform;
}

html.js-enabled .ex1_soil.is-visible,
html.js-enabled .ex2_moon.is-visible,
html.js-enabled .ex3_dream.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html.js-enabled .ex1_soil::before,
html.js-enabled .ex2_moon::before,
html.js-enabled .ex3_dream::before,
html.js-enabled .ex1_soil::after,
html.js-enabled .ex2_moon::after,
html.js-enabled .ex3_dream::after {
  opacity: 0;
  transition: opacity 500ms ease-out 450ms;
}

html.js-enabled .ex1_soil.is-visible::before,
html.js-enabled .ex2_moon.is-visible::before,
html.js-enabled .ex3_dream.is-visible::before {
  opacity: 0.4;
}

html.js-enabled .ex1_soil.is-visible::after,
html.js-enabled .ex2_moon.is-visible::after,
html.js-enabled .ex3_dream.is-visible::after {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  html.js-enabled .ex1_soil,
  html.js-enabled .ex2_moon,
  html.js-enabled .ex3_dream {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html.js-enabled .ex1_soil::before,
  html.js-enabled .ex2_moon::before,
  html.js-enabled .ex3_dream::before {
    opacity: 0.4;
    transition: none;
  }

  html.js-enabled .ex1_soil::after,
  html.js-enabled .ex2_moon::after,
  html.js-enabled .ex3_dream::after {
    opacity: 1;
    transition: none;
  }
}
/*
.example > img {
  width: 220px;
  max-width: 35%;
  height: auto;
  flex: 0 0 auto;
}
*/
.example_caption {
  position: relative;
  font-size: 20px;
  font-weight: 600; /* semibold */
  line-height: 1.6;
  margin: 0;
  background-color: #ffffff;
  /*
  border: 3px solid var(--wakatte_blue);
  */
  border-radius: 1.25em;
  padding: 1.5em 2em;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.example_caption::before,
.example_caption::after {
  content: "";
  position: absolute;
}

.example_caption::before {
  left: -2.5em;
  top: 50%;
  width: 3em;
  height: 4px;
  background-color: #ffffff;
}

.example_caption::after {
  left: -3em;
  top: calc(50% - 0.5em + 2px);
  width: 1em;
  height: 1em;
  border-radius: 50%;
  background-color: #ffffff;
}

.example.reverse .example_caption::before {
  left: auto;
  right: -2.5em;
}

.example.reverse .example_caption::after {
  left: auto;
  right: -3em;
}
.ex_strong {
  font-size: 26px;
  font-weight: 800; /* extrabold */
  display: inline;
  background-image: linear-gradient(var(--yellow_marker), var(--yellow_marker));
  background-repeat: no-repeat;
  background-size: 100% 20px;
  background-position: 0 100%;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* 構成 */
.structure_area {
  padding-top: 2em;
}
.structure_intro {
  position: relative;
  isolation: isolate;
  text-align: center;
  font-size: 18px;
  line-height: 1.75;
  font-weight: 400; /* regular */
  margin-bottom: 4em;
}
.structure_intro::before {
  content: "";
  position: absolute;
  top: -34px;
  right: 96px;
  width: 200px;
  height: 300px;
  background-image: url("../images/bg_sunflower.png");
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 0.2;
  z-index: -1;
  pointer-events: none;
}
.structure_strong {
  font-weight: 800; /* extrabold */
}
h3 {
  width: 360px;
  margin: 2em auto 1em;
  text-align: center;
  font-size: 20px;
  line-height: 2.5;
  border-top: 1px solid black;
  border-bottom: 1px solid black;
  background-color: rgba(255, 255, 255, 0.5);
}
.structure_copy {
  text-align: center;
  font-size: 20px;
  font-weight: 400; /* regular */
}
.structure_copy .strong_number {
  font-size: 34px;
  font-weight: 700; /* bold */
  color: var(--wakatte_red);
}
.structures {
  --structure_gap: calc(32px + 63px);
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--structure_gap);
  margin-top: calc(3em + 63px);
  position: relative;
  padding: 0 1em;
}
.structures::before {
  content: "";
  position: absolute;
  top: calc(33.333% - 136px);
  left: 24px;
  width: 240px;
  height: 280px;
  background-image: url("../images/bg_heart.png");
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 0.2;
  pointer-events: none;
}
.structures::after {
  content: "";
  position: absolute;
  top: calc(66.666% - 32px);
  right: 20px;
  width: 284px;
  height: 276px;
  background-image: url("../images/bg_sun.png");
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 0.2;
  pointer-events: none;
}
.structure {
  width: 80%;
  border: 3px solid var(--wakatte_navy);
  background-color: #ffffff;
  padding: 0.5em 1.5em 1.5em;
  position: relative;
  z-index: 1;
}
.structure > * {
  position: relative;
}
.structure_number {
  position: absolute;
  top: -63px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 60px;
  border-radius: 60px 60px 0 0;
  background-color: var(--wakatte_navy);
  color: white;
  font-size: 40px;
  font-weight: 700; /* bold */
  display: flex;
  align-items: center;
  justify-content: center;
}

.structure h4 {
  font-size: 20px;
  font-weight: 800; /* extrabold */
  text-align: center;
  line-height: 2.5;
  color: var(--wakatte_navy);
}
.structure_text {
  font-size: 16px;
  line-height: 1.75;
  font-weight: 500; /* medium */
  text-align: center;
  margin-bottom: 1.5em;
}
.structure_image {
  width: 100%;
  margin: 0 auto;
  height: auto;
  border: 1px solid var(--wakatte_black);
}
.structure_image img {
  width: 100%;
  height: auto;
}

/* 掲載テーマ */
.index_area {
  padding: 2.5em clamp(20px, 4vw, 48px) 2.5em;
}

.recommendation_area + .index_area {
  padding-top: 0;
}

.recommendation_area + .index_area .index_summary {
  margin-top: -2em;
}

.index_area + .closing_area {
  margin-top: 1.5em;
}

/* アコーディオン */
.index_accordion {
  /* ブラウザデフォルトのmarginをリセット */
  margin: 0;
}

.index_accordion[open] .index_list {
  animation: index-accordion-open 300ms ease-out both;
}

@keyframes index-accordion-open {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.index_summary {
  /* h3と同じ見た目 */
  display: block;
  position: relative;
  width: min(360px, calc(100% - 2em));
  margin: 2em auto 2em;
  text-align: center;
  font-size: 20px;
  font-weight: 400;
  line-height: 2.5;
  border-bottom: 1px solid black;
  /*
  border-top: 1px solid black;
  background-color: rgba(255, 255, 255, 0.5);
  */
  font-family: "Shippori Mincho", serif;
  cursor: pointer;
  list-style: none; /* Safariの三角消去 */
  user-select: none;
}

/* Chromeの三角消去 */
.index_summary::-webkit-details-marker {
  display: none;
}

.index_summary::after {
  content: "";
  position: absolute;
  right: 0.75em;
  top: 50%;
  width: 0.5em;
  height: 0.5em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-75%) rotate(45deg);
  transition: transform 200ms ease;
}

.index_accordion[open] .index_summary::after {
  transform: translateY(-25%) rotate(-135deg);
}

.index_intro {
  position: relative;
  isolation: isolate;
  text-align: center;
  font-size: 18px;
  line-height: 1.75;
  font-weight: 400; /* regular */
  margin-bottom: 4em;
}

.index_list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  font-family: "Zen Maru Gothic", sans-serif;
}

.index_volume {
  padding: 0;
}

.index_title {
  margin: 0;
  padding-bottom: 0.5em;
  font-size: 22px;
  font-weight: 700;
  color: var(--wakatte_navy);
  text-align: center;
}

.index_genre_group + .index_genre_group {
  margin-top: 2px;
}

.index_genre_group {
  --index-genre-color: var(--wakatte_navy);
  --index-genre-tint: 18%;
  --index-genre-bg: color-mix(
    in srgb,
    var(--index-genre-color) var(--index-genre-tint),
    white
  );
  display: flex;
  margin: 0 auto;
  align-items: stretch;
  gap: 0;
  max-width: 40em;
}

.index_genre_group_living {
  --index-genre-color: var(--wakatte_green);
}

.index_genre_group_human {
  --index-genre-color: var(--wakatte_blue);
}

.index_genre_group_earth {
  --index-genre-color: var(--wakatte_red);
}

.index_genre_group_weather {
  --index-genre-color: #44a392;
}

.index_genre_group_space {
  --index-genre-color: var(--wakatte_purple);
}

.index_genre {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  color: var(--index-genre-color);
  background-color: transparent;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-shrink: 0;
  letter-spacing: 0.1em;
}
.index_tag {
  display: inline-block;
  padding: 1.25em 0.25em;
  background-color: white;
  border-radius: 1.5em 0 0 1.5em;
}

.index_sublist {
  margin: 0;
  padding-left: 0;
  list-style: none;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.index_sublist li {
  display: grid;
  grid-template-columns: 22em minmax(0, 1fr);
  column-gap: 0.9em;
  align-items: center;
  font-size: 16px;
  line-height: 1.8;
  margin-top: 0;
  padding: 0.45em 0.8em;
  background-color: rgba(0, 0, 0, 0.05);
  background-color: var(--index-genre-bg);
  border-left: 4px solid var(--index-genre-color);
}

.index_item_main {
  display: block;
  min-width: 0;
  max-width: 22em;
}

.index_item_relation {
  margin-top: 0;
  font-size: 0.82em;
  line-height: 1.5;
  font-weight: 500;
  color: var(--index-genre-color);
  color: color-mix(in srgb, var(--index-genre-color) 88%, black);
  white-space: normal;
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 0.3em;
  row-gap: 0;
  padding-left: 2.3em;
}

.index_rel_chunk {
  white-space: nowrap;
}

.index_item_relation::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2em;
  height: 2em;
  background-color: var(--index-genre-color);
  -webkit-mask-image: url("../images/icon_link.svg");
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  -webkit-mask-position: center;
  mask-image: url("../images/icon_link.svg");
  mask-repeat: no-repeat;
  mask-size: contain;
  mask-position: center;
}

@media only screen and (max-width: 780px) {
  .index_sublist li {
    grid-template-columns: 1fr;
    row-gap: 0.25em;
    align-items: start;
  }

  .index_item_relation {
    white-space: normal;
  }

  .index_rel_chunk {
    white-space: normal;
  }
}

/* 商品情報 */
.spec_area {
  padding: 4em 0 2em;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(260px, 410px) max-content;
  grid-template-rows: auto auto auto auto auto;
  grid-auto-flow: row;
  align-items: start;
  justify-content: center;
  column-gap: clamp(16px, 2.2vw, 32px);
  grid-template-areas:
    "h3_area h3_area"
    "books_area spec_note_area"
    "books_area spec_list_area"
    "books_area purchase_button_area"
    "flyer_area .";
}
.spec_area h3 {
  grid-area: h3_area;
  margin: 2em auto 2em;
}
.books {
  grid-area: books_area;
  display: flex;
  gap: 10px;
}
.flyer {
  grid-area: flyer_area;
  justify-self: end;
}
.flyer p {
  display: inline-block;
  font-size: 16px;
  font-weight: 500; /* medium */
  border-bottom: 1px solid #999999;
}
.flyer p::after {
  content: "";
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-left: 0.35em;
  vertical-align: -0.1em;
  background-color: currentColor;
  -webkit-mask-image: url("../images/icon_pdf_link.svg");
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  -webkit-mask-position: center;
  mask-image: url("../images/icon_pdf_link.svg");
  mask-repeat: no-repeat;
  mask-size: contain;
  mask-position: center;
}
.spec_note {
  grid-area: spec_note_area;
  font-size: 16px;
  font-weight: 400; /* regular */
}
.book_title {
  font-size: 18px;
  font-weight: 700; /* bold */
}
.book_author {
  font-size: 16px;
  font-weight: 600; /* semibold */
  margin-top: 8px;
}

.spec_list {
  grid-area: spec_list_area;
  font-size: 16px;
  font-weight: 600; /* semibold */
  margin-top: 16px;
}

.purchase_button {
  grid-area: purchase_button_area;
  align-self: end;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 160px;
  height: 40px;
  font-family: "Zen Maru Gothic", sans-serif;
  font-weight: 500; /* medium */
  font-style: normal;
  color: var(--wakatte_black);
  border-radius: 20px;
  border: 1px solid var(--wakatte_black);
  background-color: #ffffff;
  cursor: pointer;
}

/* 推薦 */
.recommendation_area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5em;
  padding: 0em 1em 3em;
}
.recommendation_balloon {
  position: relative;
  max-width: 608px;
  background-color: #ffffff;
  border-radius: 1.5em;
  padding: 1.5em 2em;
  font-size: 16px;
  line-height: 1.75;
  font-family: "Zen Maru Gothic", sans-serif;
}
.recommendation_balloon::after {
  content: "";
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 24px;
  background-color: #ffffff;
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}
.recommendation_balloon .emphasis {
  font-weight: 600;
  background-image: linear-gradient(var(--yellow_marker), var(--yellow_marker));
  background-repeat: no-repeat;
  background-size: 100% 10px;
  background-position: 0 100%;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* クロージング */
.closing_area {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 1.5em;
  padding-bottom: 4em;
}
.closing_copy {
  position: relative;
  transform: rotate(-6deg);
  width: 362px;
  height: 76px;
  font-size: 26px;
  line-height: 1.5;
  font-weight: 800; /* extrabold */
  text-align: center;
}
html.js-enabled .closing_copy {
  transform: rotate(-6deg);
}

html.js-enabled .closing_area {
  opacity: 0;
  transform: scale(0.72);
  transform-origin: center center;
}

html.js-enabled .closing_area.is-visible {
  animation: closing-copy-zoom-in 700ms ease-out forwards;
}

html.js-enabled .closing_charactor img {
  transform: translateY(0) rotate(0deg);
  transform-origin: center bottom;
}

.closing_copy::before,
.closing_copy::after {
  content: "";
  position: absolute;
  top: 0;
  width: 88px;
  height: 1px;
  background-color: currentColor;
}
.closing_copy::before {
  left: 0;
  transform: rotate(60deg);
  transform-origin: left top;
}
.closing_copy::after {
  right: 0;
  transform: rotate(-60deg);
  transform-origin: right top;
}

@keyframes closing-copy-zoom-in {
  0% {
    opacity: 0;
    transform: scale(0.72);
  }

  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  html.js-enabled .closing_copy {
    transform: rotate(-6deg);
  }

  html.js-enabled .closing_area {
    opacity: 1;
    transform: none;
  }

  html.js-enabled .closing_area.is-visible {
    animation: none;
  }
}

/* お問い合わせ */
.wk_contact_area {
  padding-bottom: 4em;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.5em;
  font-size: 16px;
  font-weight: 400; /* regular */
}
.contact_copy {
  line-height: 1.75;
  margin-bottom: 0.5em;
}
.contact_to,
.contact_tel {
  line-height: 1;
}

/* =====================================
   Responsive
===================================== */

/* <= 1024px */
@media only screen and (max-width: 1024px) {
  /* キービジュアル */
  #kv_area {
    height: 470px;
    --kv_scale: calc(470 / 550);
  }
  /*
  .kv_intro {
    max-width: calc(100vw - 64px);
  }
  .kv_intro p.intro_weak {
    margin-left: 0;
  }

  .kv_intro p.intro_strong {
    margin-left: 180px;
  }
*/
  .kv_question {
    margin-top: calc(-75px * var(--kv_scale));
    width: calc(250px * var(--kv_scale));
    height: calc(370px * var(--kv_scale));
  }

  .kv_logo {
    width: calc(364px * var(--kv_scale));
    height: auto;
    top: calc(190px * var(--kv_scale));
  }

  .kv_snowflake {
    top: calc(220px * var(--kv_scale));
    left: calc((50% - calc(130px * var(--kv_scale))) * 151 / 410);
    width: calc(130px * var(--kv_scale));
    height: calc(130px * var(--kv_scale));
  }

  .kv_snowflake_balloon {
    top: calc(149px * var(--kv_scale));
    left: calc(
      (50% - calc(130px * var(--kv_scale))) * 151 / 410 -
        calc(40px * var(--kv_scale))
    );
    width: calc(208px * var(--kv_scale));
    height: calc(66px * var(--kv_scale));
  }

  .kv_zebra {
    top: calc(347px * var(--kv_scale));
    left: calc(-215px * var(--kv_scale));
    width: calc(460px * var(--kv_scale));
    height: calc(315px * var(--kv_scale));
  }

  .kv_zebra_balloon {
    top: calc(487px * var(--kv_scale));
    left: calc(135px * var(--kv_scale));
    width: calc(212px * var(--kv_scale));
    height: calc(40px * var(--kv_scale));
  }

  .kv_earth {
    top: calc(75px * var(--kv_scale));
    right: calc(-52px * var(--kv_scale));
    width: calc(380px * var(--kv_scale));
    height: calc(380px * var(--kv_scale));
  }

  .kv_earth_balloon {
    top: calc(459px * var(--kv_scale));
    right: calc(25px * var(--kv_scale));
    width: calc(192px * var(--kv_scale));
    height: calc(66px * var(--kv_scale));
  }

  /* コンテンツ共通 */
  #content_area {
    padding: 24px;
  }

  .content_inner {
    width: 100%;
  }

  /* 構成 */
  .structure {
    width: min(92%, 860px);
  }

  /* 商品情報 */
  .books img {
    max-width: 100%;
    height: auto;
  }

  /* 推薦 */
  .recommendation_area {
    gap: 1.5em;
    padding: 28px 1em;
  }
}

/* <= 900px */
@media only screen and (max-width: 900px) {
  /* キービジュアル */
  /*
  .kv_intro {
    width: fit-content;
    max-width: calc(100vw - 40px);
    margin: 0 auto;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .kv_intro p.intro_weak {
    font-size: clamp(15px, 1.95vw, 18px);
    margin-left: 0;
  }

  .kv_intro p.intro_strong {
    font-size: clamp(22px, 3vw, 26px);
    margin-top: clamp(2px, 0.5vw, 6px);
    margin-left: clamp(72px, 12vw, 156px);
    margin-right: 0;
    white-space: nowrap;
  }

  .kv_intro p.intro_strong::before {
    top: 52%;
    height: clamp(56px, 7vw, 66px);
  }

  .kv_intro p .emphasis {
    font-size: clamp(30px, 4vw, 35px);
    background-size: 100% clamp(24px, 3.2vw, 28px);
  }
  */
  .kv_intro p.intro_strong {
    margin-left: 5em;
  }
  .kv_intro p.intro_weak::before {
    background: linear-gradient(
      to right,
      var(--wakatte_red) 0%,
      var(--wakatte_purple) 26.6%,
      var(--wakatte_blue) 53.2%,
      var(--wakatte_green) 95.7%
    );
  }
  .kv_intro p.intro_strong::before {
    background: linear-gradient(
      to right,
      var(--wakatte_red) -16.6%,
      var(--wakatte_purple) 12.5%,
      var(--wakatte_blue) 41.7%,
      var(--wakatte_green) 88.3%
    );
  }

  /* 例示 */
  .example_area {
    width: min(90vw, 860px);
    margin: 0 auto;
    gap: 1.8em;
  }

  .example {
    width: 100%;
    gap: 16px;
    align-items: flex-start;
  }

  .ex1_soil,
  .ex3_dream {
    width: min(43vw, 330px);
  }

  .ex2_moon {
    width: min(30vw, 230px);
  }

  .ex2_moon::before,
  .ex2_moon::after {
    left: auto;
    right: clamp(-18px, -2vw, -8px);
    top: clamp(-12px, -1.4vw, -6px);
    width: clamp(40px, 5vw, 48px);
    height: calc(clamp(40px, 5vw, 48px) * 370 / 250);
  }

  .ex3_dream::before,
  .ex3_dream::after {
    left: auto;
    right: 18%;
    top: 78%;
    width: clamp(38px, 4.8vw, 46px);
    height: calc(clamp(38px, 4.8vw, 46px) * 370 / 250);
  }

  .example_caption {
    max-width: min(48vw, 25rem);
    padding: 1.15em 1.3em;
    font-size: 18px;
    line-height: 1.55;
  }

  /* 商品情報 */
  .spec_note,
  .spec_list {
    font-size: 15px;
  }

  .book_title {
    font-size: 16px;
  }

  .book_author {
    font-size: 15px;
  }

  .purchase_button {
    width: 150px;
    height: 38px;
  }

  /* 推薦 */
  .recommendation_area {
    gap: 1em;
  }

  .recommendation_balloon {
    max-width: min(62vw, 26rem);
    padding: 1.2em 1.4em;
    font-size: 15px;
  }

  .recommendation_balloon::after {
    right: -28px;
    width: 28px;
    height: 20px;
  }

  /* クロージング */
  .closing_copy {
    width: min(72vw, 340px);
    height: auto;
    font-size: 24px;
  }
}

/* 601px - 780px */
@media only screen and (max-width: 780px) and (min-width: 601px) {
  .kv_intro p.intro_weak {
    font-size: 16px;
  }
  .kv_intro p.intro_strong {
    font-size: 18px;
    margin: -0.5em 0 0 7.1em;
  }
  .kv_intro p .emphasis {
    font-size: 27px;
  }
  .kv_intro p.intro_weak::before {
    height: 2.5em;
    top: 0.75em;
    background: linear-gradient(
      to right,
      var(--wakatte_red) 0%,
      var(--wakatte_purple) 26.5%,
      var(--wakatte_blue) 53%,
      var(--wakatte_green) 95.5%
    );
  }
  .kv_intro p.intro_strong::before {
    background: linear-gradient(
      to right,
      var(--wakatte_red) -29.6%,
      var(--wakatte_purple) 2.8%,
      var(--wakatte_blue) 35.2%,
      var(--wakatte_green) 87%
    );
  }

  .structure_intro,
  .index_intro {
    max-width: 24em;
    margin: 0 auto;
  }

  .structure {
    padding: 0.5em 1em 1.5em;
    margin: 0 0.5em;
  }

  .spec_area {
    width: min(94%, 720px);
    margin: 0 auto;
    grid-template-columns: minmax(220px, 1fr) 276px;
    column-gap: 1em;
    justify-content: center;
  }

  .books {
    width: 100%;
    max-width: 410px;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 0;
    --book-overlap: clamp(0px, calc(340px - 100%), 64px);
  }

  .books .book {
    width: clamp(120px, calc((100% + var(--book-overlap)) / 2), 170px);
    flex: 0 0 auto;
  }

  .books .book:first-child {
    margin-top: 0;
  }

  .books .book:last-child {
    margin-left: calc(-1 * var(--book-overlap));
    margin-top: 0.75em;
    z-index: 1;
  }

  .books .book img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 8px rgba(0, 0, 0, 0.22));
  }
}

/* 601px - 671px */
@media only screen and (max-width: 671px) and (min-width: 601px) {
  .flyer p {
    font-size: clamp(12px, 1.95vw, 14px);
    white-space: nowrap;
    letter-spacing: -0.02em;
  }
}

/* <= 600px */
@media only screen and (max-width: 600px) {
  #wakatteinai main {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
  }

  .index_summary {
    width: min(12.5em, calc(100% - 2em));
    font-size: clamp(1px, calc(1600vw / 375), 20px);
  }

  .index_area {
    padding: 2.25em 0 2em;
  }

  .recommendation_area + .index_area .index_summary {
    margin-top: 0.3em;
  }

  .index_volume {
    padding: 1.25em 1em;
  }

  .index_title {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
  }

  .index_genre {
    font-size: calc(1500vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 16px);
  }

  .index_tag {
    font-size: calc(1400vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 15px);
    padding: 1em 0.125em;
  }

  .index_sublist li {
    font-size: calc(1400vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 15px);
    line-height: 1.7;
    padding-right: 0.25em;
  }

  .index_item_relation {
    font-size: 0.93em;
  }

  /* SPではKVの装飾背景を無効化 */
  .kv_intro_area,
  .kv_intro,
  .kv_intro p {
    background: none;
    box-shadow: none;
    text-shadow: none;
    filter: none;
  }

  /* 擬似要素は生成ごと止める */
  .kv_intro::before,
  .kv_intro::after,
  .kv_intro p::before,
  .kv_intro p::after,
  .kv_intro p.intro_weak::before,
  .kv_intro p.intro_strong::before {
    content: none;
    background: none;
    box-shadow: none;
  }

  #kv_area {
    min-height: calc(40000vw / 375); /* fallback */
    min-height: clamp(320px, calc(40000vw / 375), 640px);
    height: auto;
    padding-bottom: 1.5em;
    margin-bottom: calc(-4000vw / 375);
  }

  .kv_intro {
    width: calc(400 / 375 * 100vw);
    height: calc(70 / 375 * 100vw);
    padding: calc(20 / 375 * 100vw) 0 0 calc(28 / 375 * 100vw);
    margin-top: calc(-20 / 375 * 100vw);
    margin-left: calc(-14 / 375 * 100vw);
    background: linear-gradient(
      to right,
      var(--wakatte_red) 0%,
      var(--wakatte_purple) 25%,
      var(--wakatte_blue) 50%,
      var(--wakatte_green) 90%
    );
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.5);

    transform: rotate(var(--kv_intro_rotate));
    transform-origin: left top;
  }

  br.sp {
    display: inline;
  }

  .kv_intro p {
    font-size: calc(1400vw / 375);
    font-weight: 600; /* semibold */
    display: inline;
    transform: none;
  }

  .kv_intro p.intro_weak,
  .kv_intro p.intro_strong {
    display: none;
  }

  .kv_intro .intro_sp {
    display: block;
    margin: 0;
    line-height: 1;
  }

  .kv_intro .intro_sp .line {
    display: block;
  }

  .kv_intro .intro_sp .line + .line {
    margin-top: -0.25em;
  }

  .kv_intro .intro_sp .line_left {
    text-align: left;
  }

  .kv_intro .intro_sp .line_center {
    text-align: center;
  }

  .kv_intro .intro_sp .line_right {
    text-align: right;
  }

  .kv_intro p.intro_weak {
    display: none;
    width: auto;
    margin: 0;
    transform: none;
  }

  .kv_intro p.intro_strong {
    display: none;
    width: auto;
    margin: 0;
    transform: none;
  }

  .kv_intro p .emphasis {
    font-size: calc(2000vw / 375); /* fallback */
    font-size: clamp(1px, calc(2000vw / 375), 30px);
    background-size: 100% calc(1600vw / 375);
  }

  .kv_question {
    top: calc(6000vw / 375);
    width: calc(11000vw / 375); /* fallback */
    /*
    width: clamp(80px, calc(11000vw / 375), 300px);
    */
    height: auto;
  }

  .kv_question img {
    width: 100%;
    height: auto;
  }

  .kv_logo {
    top: calc(15000vw / 375);
    width: calc(17800vw / 375);
  }
  .kv_snowflake {
    transform: none;
    top: calc(7000vw / 375);
    left: calc(-1500vw / 375);
    width: calc(10400vw / 375);
  }
  .kv_zebra {
    transform: none;
    top: calc(28000vw / 375);
    left: calc(-13000vw / 375);
    width: calc(27600vw / 375);
  }
  .kv_zebra_balloon {
    transform: none;
    top: calc(32000vw / 375);
    left: calc(14000vw / 375);
    width: calc(16000vw / 375);
  }
  .kv_earth {
    transform: none;
    top: calc(14500vw / 375);
    right: calc(-1100vw / 375);
    width: calc(14000vw / 375);
  }
  .kv_earth_balloon {
    transform: none;
    top: calc(9300vw / 375);
    right: calc(300vw / 375);
    width: calc(12000vw / 375);
  }

  .kv_snowflake_balloon {
    display: none;
  }

  #content_area {
    padding: 12px;
    background-size: calc(6525vw / 375) auto;
    background-position-y: -15vw;
    background-position-x: -7vw;
  }

  .content_inner {
    width: 100%;
  }

  .intro {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
    padding-top: 1em;
  }
  .intro_stronger {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
  }
  .intro_stronger::after {
    top: calc(100% + 2px);
  }
  .intro_subtle {
    font-size: calc(1400vw / 375); /* fallback */
    font-size: clamp(1px, calc(1400vw / 375), 16px);
    margin-top: 16px;
  }

  .example_area {
    width: 100vw;
    margin-left: 50%;
    transform: translateX(-50%);
    box-sizing: border-box;
    gap: 3em;
    padding: 20px 0 28px;
  }

  .example,
  .example.reverse {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .example .ex1_soil,
  .example .ex2_moon,
  .example .ex3_dream {
    margin-right: auto;
  }

  .example .example_caption {
    margin-left: auto;
  }

  .example.reverse .ex1_soil,
  .example.reverse .ex2_moon,
  .example.reverse .ex3_dream {
    margin-left: auto;
    margin-right: 0;
  }

  .example.reverse .example_caption {
    margin-right: auto;
    margin-left: 0;
  }

  .ex1_soil {
    width: calc(27000vw / 375); /* fallback */
    width: clamp(220px, calc(27000vw / 375), 320px);
  }
  .ex1_soil::before,
  .ex1_soil::after {
    left: calc(28300vw / 375);
    top: calc(2112vw / 375);
    width: calc(4000vw / 375);
    height: calc(5920vw / 375);
  }

  .ex1_soil::before {
    transform: translate(4px, 5px) rotate(15deg);
  }

  .ex1_soil::after {
    transform: rotate(15deg);
  }
  .ex2_moon {
    width: min(74vw, 300px);
  }

  .ex3_dream {
    width: min(78vw, 320px);
  }
  .ex2_moon::before,
  .ex2_moon::after {
    left: calc(-3900vw / 375);
    top: calc(3500vw / 375);
  }

  .ex2_moon::before {
    transform: translate(4px, 5px) rotate(-13deg);
  }

  .ex2_moon::after {
    transform: rotate(-13deg);
  }
  .ex3_dream::before,
  .ex3_dream::after {
    right: calc(900vw / 375);
    top: calc(1800vw / 375);
  }

  .ex3_dream::before {
    transform: translate(4px, 5px) rotate(28deg);
  }

  .ex3_dream::after {
    transform: rotate(28deg);
  }
  .example_caption {
    max-width: min(92%, 34rem);
    border-radius: 1.5em 0 0 1.5em;
    margin-top: -0.75em;
    padding: 1.1em 1.25em;
    font-size: calc(1400vw / 375); /* fallback */
    font-size: clamp(1px, calc(1800vw / 375), 20px);
    line-height: 1.55;
  }
  .example.reverse .example_caption {
    border-radius: 0 1.5em 1.5em 0;
    margin-top: -1.25em;
  }

  .example.reverse .ex2_moon + .example_caption {
    margin-top: -4em;
  }

  .ex_strong {
    font-size: calc(1800vw / 375); /* fallback */
    font-size: clamp(1px, calc(1800vw / 375), 26px);
  }

  .example_caption::before,
  .example_caption::after {
    display: none;
  }

  .structure_area {
    padding-top: 3.5em;
  }

  h3 {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 20px);
    line-height: 2.5;
    width: 12.5em;
    margin: 4.5em auto 1em;
  }
  .structure_intro,
  .index_intro {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
    line-height: 1.7;
    width: 19em;
    margin: 0 auto;
  }

  .structures::before,
  .structures::after {
    display: block;
  }

  .structures::before {
    top: calc(33.333% - 1.6em);
    left: auto;
    right: 2vw;
    width: calc(9000vw / 375);
    height: calc(10500vw / 375);
  }

  .structures::after {
    top: auto;
    bottom: calc(-1400vw / 375);
    left: 1vw;
    right: auto;
    width: calc(9800vw / 375);
    height: calc(9500vw / 375);
  }

  .structure_intro::before {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: calc(10000vw / 375);
    height: calc(15000vw / 375);
  }

  .structure_copy {
    font-size: calc(1800vw / 375); /* fallback */
    font-size: clamp(1px, calc(1800vw / 375), 20px);
  }
  .structure_strong {
    font-size: calc(2200vw / 375); /* fallback */
    font-size: clamp(1px, calc(2200vw / 375), 28px);
  }

  .structures {
    --structure_gap: 1em;
    gap: var(--structure_gap);
    margin-top: 2em;
  }

  .structure {
    width: 92%;
    padding: 0.75em 0.9em 1em;
    border: none;
    background-color: transparent;
    display: grid;
    grid-template-columns: 1fr max-content max-content 1fr;
    align-items: center;
    row-gap: 0.5em;
  }

  .structure_number {
    width: calc(3000vw / 375); /* fallback */
    width: clamp(1px, calc(3000vw / 375), 30px);
    height: calc(3000vw / 375); /* fallback */
    height: clamp(1px, calc(3000vw / 375), 30px);
    border-radius: 50%;
    font-size: calc(2000vw / 375); /* fallback */
    font-size: clamp(1px, calc(2000vw / 375), 20px);
    position: static;
    top: auto;
    left: auto;
    transform: none;
    margin: 0 0.4em 0 0;
    grid-column: 2;
    grid-row: 1;
  }

  .structure h4 {
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 16px);
    line-height: 1.5;
    margin: 0;
    text-align: left;
    grid-column: 3;
    grid-row: 1;
  }

  .structure_text {
    font-size: calc(1400vw / 375); /* fallback */
    font-size: clamp(1px, calc(1400vw / 375), 14px);
    line-height: 1.6;
    margin: 0 0 1em;
    grid-column: 1 / -1;
    grid-row: 3;
  }

  .structure_image {
    width: 100%;
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .spec_area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1em;
    padding: 2.5em 12px 2em;
  }

  .spec_area > * {
    align-self: center;
  }

  .spec_area h3 {
    order: 1;
    margin: 1.2em auto 1em;
  }

  .spec_note {
    order: 2;
  }

  .books {
    order: 3;
    width: min(92vw, 420px);
    justify-content: center;
    align-items: flex-start;
    gap: 0;
  }

  .books .book:first-child {
    margin-top: 0;
  }

  .books .book:last-child {
    margin-left: -0.75em;
    margin-top: 1em;
  }

  .books .book {
    width: min(44vw, 170px);
  }

  .books .book img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.22));
  }

  .spec_note,
  .spec_list,
  .flyer {
    width: min(92vw, 420px);
  }

  .spec_list {
    order: 4;
  }

  .spec_note,
  .spec_list {
    font-size: 14px;
    text-align: center;
  }

  .spec_list {
    width: fit-content;
    max-width: min(92vw, 420px);
    margin: 0 auto;
    text-align: left;
  }

  .purchase_button {
    order: 5;
    align-self: center;
    font-size: calc(2000vw / 375); /* fallback */
    font-size: clamp(1px, calc(2000vw / 375), 18px);
    padding: 0 1.5em;
    border-radius: 2em;
  }

  .flyer {
    order: 6;
    justify-self: auto;
    text-align: center;
  }

  .flyer p {
    font-size: 14px;
  }

  .recommendation_area {
    flex-direction: column;
    gap: 2em;
    padding: 2em 1em;
  }

  .recommender {
    order: 1;
  }

  .recommendation_balloon {
    order: 2;
    max-width: min(70vw, 22em);
    padding: 1.5em 1.5em;
    font-size: calc(1600vw / 375); /* fallback */
    font-size: clamp(1px, calc(1600vw / 375), 18px);
  }

  .recommendation_balloon::after {
    display: block;
    left: 50%;
    right: auto;
    top: -24px;
    width: 24px;
    height: 36px;
    transform: translateX(-50%);
    clip-path: polygon(50% 0, 0 100%, 100% 100%);
  }

  .recommender img {
    width: calc(8000vw / 375);
    height: auto;
  }

  .closing_area {
    gap: 0.8em;
    padding: 0 0.75em 2.5em;
    margin-top: 4em;
  }

  .closing_copy {
    width: min(88vw, 320px);
    height: auto;
    font-size: 22px;
  }

  .closing_charactor img {
    width: min(45vw, 180px);
    height: auto;
  }

  .wk_contact_area {
    padding: 0 12px 3em;
    font-size: 14px;
  }

  .contact_copy {
    text-align: center;
    margin-bottom: 0.25em;
    width: 15em;
  }
}

/* <= 520px */
@media only screen and (max-width: 520px) {
  .kv_intro {
    margin-top: calc(-24 / 375 * 100vw);
  }
  .kv_question {
    top: calc(4000vw / 375);
  }
}

/* <= 420px */
@media only screen and (max-width: 420px) {
  .kv_intro {
    margin-top: calc(-28 / 375 * 100vw);
  }
  .kv_question {
    top: calc(2000vw / 375);
  }
  .kv_snowflake {
    top: calc(7000vw / 375);
  }
}