/* ==================================================
   01. CSS変数
================================================== */
:root {
  --color-primary: #a68bd1;
  --color-primary-dark: #8467b7;
  --color-primary-light: #f4effb;
  --color-mint: #79c9bf;
  --color-mint-dark: #54ada2;
  --color-gold: #c8ae76;
  --color-text: #2f2b34;
  --color-muted: #6f6876;
  --color-border: #e7e1ee;
  --color-white: #ffffff;
  --color-bg: #fcfbfd;

  --font-sans: "Noto Sans JP", sans-serif;
  --font-serif: "Noto Serif JP", serif;
  --font-display: "DM Serif Display", serif;

  --container-width: 1180px;
  --container-narrow: 840px;
  --header-height: 84px;

  --radius-small: 10px;
  --radius-medium: 18px;
  --radius-large: 28px;

  --shadow-soft: 0 16px 40px rgba(84, 70, 110, 0.1);
  --shadow-card: 0 10px 30px rgba(84, 70, 110, 0.08);

  --transition: 0.25s ease;
}

/* ==================================================
   02. Reset・基本設定
================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
p,
figure {
  margin-top: 0;
}

address {
  font-style: normal;
}

/* ==================================================
   03. 共通レイアウト
================================================== */
.container {
  width: min(calc(100% - 40px), var(--container-width));
  margin-inline: auto;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: 112px 0;
}

.section-heading {
  position: relative;
  margin-bottom: 54px;
  text-align: center;
}

.section-heading--left {
  text-align: left;
}

.section-heading__en {
  position: absolute;
  top: -34px;
  left: 50%;
  margin: 0;
  color: rgba(166, 139, 209, 0.2);
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-style: italic;
  line-height: 1;
  transform: translateX(-50%);
  pointer-events: none;
}

.section-heading--left .section-heading__en {
  left: -12px;
  transform: none;
}

.section-heading h2 {
  position: relative;
  margin-bottom: 14px;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.section-heading > p:last-child {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  color: var(--color-muted);
}

.section-heading--left > p:last-child {
  margin-left: 0;
}

/* ==================================================
   04. 共通パーツ
================================================== */
.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition:
    transform var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    color var(--transition);
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible,
.global-navigation a:focus-visible,
.faq-item button:focus-visible,
.page-top:focus-visible {
  outline: 3px solid rgba(121, 201, 191, 0.55);
  outline-offset: 3px;
}

.button--small {
  min-height: 42px;
  padding: 8px 18px;
  font-size: 0.85rem;
}

.button--wide {
  min-width: 280px;
}

.button--purple {
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  box-shadow: 0 10px 24px rgba(132, 103, 183, 0.22);
}

.button--purple:hover {
  background: linear-gradient(135deg, #b499dd, #785ba9);
}

.button--mint {
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-mint), var(--color-mint-dark));
}

.button--outline {
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
  background: var(--color-white);
}

.button--outline:hover {
  color: var(--color-white);
  background: var(--color-primary);
}

.button--white {
  color: var(--color-primary-dark);
  border-color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.92);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  padding: 10px 16px;
  color: var(--color-white);
  background: var(--color-primary-dark);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ==================================================
   05. ヘッダー
================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(231, 225, 238, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  width: min(calc(100% - 40px), 1380px);
  min-height: var(--header-height);
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.site-logo {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 10px;
}

.site-logo__mark {
  position: relative;
  display: block;
  width: 48px;
  height: 48px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--color-white);
}

.site-logo__mark img {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 116px;
  max-width: none;
  transform: translate(-50%, -47%);
}

.site-logo__text {
  display: grid;
  line-height: 1.05;
}

.site-logo__text strong {
  color: var(--color-primary-dark);
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.12em;
}

.site-logo__text small {
  margin-top: 5px;
  color: var(--color-muted);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
}

.global-navigation {
  display: flex;
  align-items: center;
  gap: 28px;
}

.global-navigation__list {
  display: flex;
  align-items: center;
  gap: 26px;
}

.global-navigation__list a {
  position: relative;
  font-size: 0.85rem;
  font-weight: 600;
}

.global-navigation__list a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  background: var(--color-primary);
  content: "";
  transform: scaleX(0);
  transition: transform var(--transition);
}

.global-navigation__list a:hover::after {
  transform: scaleX(1);
}

.global-navigation__actions {
  display: flex;
  gap: 10px;
}

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-button__line {
  display: block;
  width: 100%;
  height: 2px;
  margin: 6px 0;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

/* ==================================================
   06. メインビジュアル
================================================== */
.hero {
  position: relative;
  display: grid;
  min-height: 720px;
  padding-top: var(--header-height);
  align-items: center;
  overflow: hidden;
  background: #f8f5fb;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.98) 0%,
      rgba(255, 255, 255, 0.9) 37%,
      rgba(255, 255, 255, 0.26) 64%,
      rgba(255, 255, 255, 0) 100%
    );
  content: "";
}

.hero__image {
  position: absolute;
  inset: 0;
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 65% center;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-top: 70px;
  padding-bottom: 100px;
}

.hero__eyebrow {
  margin-bottom: 22px;
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.hero h1 {
  max-width: 730px;
  margin-bottom: 30px;
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5.6vw, 5.5rem);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0.08em;
}

.hero__lead {
  margin-bottom: 40px;
  color: var(--color-muted);
  font-size: 1.05rem;
  line-height: 2;
}

.hero-benefits {
  display: flex;
  max-width: 540px;
  gap: 10px;
}

.hero-benefits li {
  display: grid;
  width: 33.333%;
  min-height: 142px;
  place-items: center;
  align-content: center;
  padding: 14px 8px;
  border: 1px solid rgba(166, 139, 209, 0.2);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.48);
  text-align: center;
  backdrop-filter: blur(8px);
}

.hero-benefits__icon {
  color: var(--color-primary);
  font-size: 2rem;
  line-height: 1;
}

.hero-benefits strong {
  margin-top: 5px;
  font-size: 0.82rem;
}

.hero-benefits span:last-child {
  color: var(--color-muted);
  font-size: 0.7rem;
}

/* ==================================================
   07. 体験レッスン案内
================================================== */
.trial-bar {
  position: relative;
  z-index: 3;
  margin-top: -64px;
}

.trial-bar__inner {
  display: flex;
  min-height: 130px;
  align-items: center;
  gap: 30px;
  padding: 22px 34px;
  border: 1px solid rgba(166, 139, 209, 0.18);
  border-radius: var(--radius-medium);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-soft);
}

.trial-bar__badge {
  display: grid;
  width: 82px;
  height: 82px;
  flex-shrink: 0;
  place-items: center;
  border-radius: 50%;
  color: var(--color-white);
  background: var(--color-primary);
  font-family: var(--font-serif);
  text-align: center;
  line-height: 1.4;
}

.trial-bar__content {
  flex: 1;
}

.trial-bar__title {
  margin-bottom: 5px;
  font-family: var(--font-serif);
  font-size: 1.15rem;
}

.trial-bar__price {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 0;
}

.trial-bar__old-price {
  color: var(--color-muted);
  text-decoration: line-through;
}

.trial-bar__price strong {
  color: var(--color-primary-dark);
  font-family: var(--font-serif);
  font-size: clamp(2.3rem, 5vw, 3.5rem);
  line-height: 1;
}

.trial-bar__price small {
  margin-left: 5px;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
}

/* ==================================================
   08. 選ばれる理由
================================================== */
.reasons {
  padding-top: 150px;
  background:
    radial-gradient(circle at 15% 20%, rgba(166, 139, 209, 0.08), transparent 28%),
    radial-gradient(circle at 85% 65%, rgba(121, 201, 191, 0.07), transparent 30%),
    var(--color-bg);
}

.reason-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.reason-card {
  padding: 16px 30px 26px;
  border-right: 1px solid var(--color-border);
  text-align: center;
}

.reason-card:last-child {
  border-right: 0;
}

.reason-card__number {
  margin-bottom: 10px;
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: 2.1rem;
}

.reason-card__icon {
  display: block;
  margin-bottom: 15px;
  color: var(--color-primary);
  font-size: 2.7rem;
  line-height: 1;
}

.reason-card h3 {
  margin-bottom: 12px;
  font-family: var(--font-serif);
  font-size: 1rem;
}

.reason-card p:last-child {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 0.88rem;
}

/* ==================================================
   09. スタジオと数字
================================================== */
.studio-data {
  display: grid;
  grid-template-columns: minmax(0, 42%) minmax(0, 58%);
  background: var(--color-white);
}

.studio-data__image {
  min-height: 560px;
}

.studio-data__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.studio-data__content {
  display: grid;
  align-content: center;
  padding: 80px clamp(40px, 8vw, 120px);
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.data-grid > div {
  min-height: 145px;
  padding: 24px 14px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.data-grid dt {
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.data-grid dd {
  color: var(--color-primary-dark);
  font-family: var(--font-serif);
}

.data-grid strong {
  margin-right: 4px;
  font-size: 2.5rem;
  font-weight: 500;
}

/* ==================================================
   10. おすすめ対象
================================================== */
.recommended {
  background:
    linear-gradient(120deg, rgba(244, 239, 251, 0.7), rgba(255, 255, 255, 0.9));
}

.recommended__layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: 70px;
}

.check-list {
  display: grid;
  gap: 17px;
}

.check-list li {
  position: relative;
  padding-left: 38px;
}

.check-list li::before {
  position: absolute;
  top: 0.15em;
  left: 0;
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-primary);
  content: "✓";
  font-size: 0.8rem;
}

.recommended__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.image-card {
  margin: 0;
}

.image-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-small);
  object-fit: cover;
  box-shadow: var(--shadow-card);
}

.image-card:nth-child(2) img {
  object-position: 40% center;
}

.image-card figcaption {
  padding: 14px 5px 0;
  font-family: var(--font-serif);
  text-align: center;
}

/* ==================================================
   11. レッスン
================================================== */
.lessons {
  background: var(--color-white);
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.lesson-card {
  position: relative;
  min-height: 300px;
  padding: 42px 34px 34px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background:
    radial-gradient(circle at top right, rgba(121, 201, 191, 0.13), transparent 34%),
    var(--color-white);
  box-shadow: var(--shadow-card);
}

.lesson-card::after {
  position: absolute;
  right: -40px;
  bottom: -65px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(166, 139, 209, 0.18);
  border-radius: 50%;
  content: "";
}

.lesson-card__label {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--color-primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.lesson-card h3 {
  margin-bottom: 18px;
  font-family: var(--font-serif);
  font-size: 1.45rem;
}

.lesson-card p {
  color: var(--color-muted);
}

.lesson-card__meta {
  margin-bottom: 0;
  color: var(--color-primary-dark) !important;
  font-weight: 600;
}

/* ==================================================
   12. 料金
================================================== */
.price {
  background:
    radial-gradient(circle at 50% 50%, rgba(166, 139, 209, 0.09), transparent 35%),
    var(--color-bg);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
  gap: 18px;
}

.price-card {
  position: relative;
  display: flex;
  min-height: 480px;
  flex-direction: column;
  padding: 46px 34px 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.price-card--featured {
  border: 2px solid var(--color-primary);
  transform: translateY(-16px);
}

.price-card__badge {
  position: absolute;
  top: -2px;
  right: -2px;
  left: -2px;
  padding: 6px;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-small) var(--radius-small) 0 0;
  font-size: 0.8rem;
  text-align: center;
}

.price-card h3 {
  margin-bottom: 20px;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  text-align: center;
}

.price-card__price {
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  text-align: center;
}

.price-card__price strong {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4vw, 3.4rem);
  font-weight: 500;
  line-height: 1;
}

.price-card__price small {
  display: block;
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 0.72rem;
}

.price-card > p:not(.price-card__price, .price-card__badge) {
  color: var(--color-muted);
  text-align: center;
}

.price-card ul {
  display: grid;
  gap: 12px;
  margin: 12px 0 30px;
}

.price-card li {
  position: relative;
  padding-left: 23px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.price-card li::before {
  position: absolute;
  left: 0;
  color: var(--color-primary);
  content: "✓";
}

.price-card .button {
  width: 100%;
  margin-top: auto;
}

.price__note {
  margin: 24px 0 0;
  color: var(--color-muted);
  font-size: 0.82rem;
  text-align: center;
}

/* ==================================================
   13. よくある質問
================================================== */
.faq {
  background: var(--color-white);
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item h3 {
  margin: 0;
}

.faq-item button {
  display: flex;
  width: 100%;
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 6px;
  border: 0;
  background: transparent;
  font-family: var(--font-serif);
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
}

.faq-item button span {
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 300;
  transition: transform var(--transition);
}

.faq-item button[aria-expanded="true"] span {
  transform: rotate(45deg);
}

.faq-item__answer {
  padding: 0 46px 24px 6px;
  color: var(--color-muted);
}

.faq-item__answer p {
  margin-bottom: 0;
}

/* ==================================================
   14. お問い合わせCTA
================================================== */
.contact-cta {
  position: relative;
  min-height: 260px;
  overflow: hidden;
  color: var(--color-text);
  background: var(--color-primary-light);
}

.contact-cta::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.98) 0%,
    rgba(255, 255, 255, 0.93) 58%,
    rgba(255, 255, 255, 0.25) 100%
  );
  content: "";
}

.contact-cta__image {
  position: absolute;
  inset: 0;
}

.contact-cta__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 70% 50%;
}

.contact-cta__inner {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 260px;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.contact-cta__label {
  display: inline-grid;
  width: 72px;
  height: 72px;
  margin-bottom: 15px;
  place-items: center;
  border-radius: 50%;
  color: var(--color-white);
  background: var(--color-primary);
  font-family: var(--font-serif);
}

.contact-cta h2 {
  margin-bottom: 10px;
  font-family: var(--font-serif);
  font-weight: 500;
}

.contact-cta h2 strong {
  margin-left: 10px;
  color: var(--color-primary-dark);
  font-size: 1.8em;
}

.contact-cta p:last-child {
  margin-bottom: 0;
  color: var(--color-muted);
}

.contact-cta__actions {
  display: grid;
  flex-shrink: 0;
  gap: 12px;
}

/* ==================================================
   15. フッター
================================================== */
.site-footer {
  padding: 70px 0 24px;
  background: var(--color-white);
}

.site-footer__main {
  display: grid;
  grid-template-columns: 1fr 1.6fr 0.8fr;
  gap: 60px;
}

.site-logo--footer {
  margin-bottom: 22px;
}

.site-footer address {
  color: var(--color-muted);
  font-size: 0.85rem;
  line-height: 1.9;
}

.site-footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.site-footer__links > div {
  display: grid;
  align-content: start;
  gap: 8px;
}

.site-footer__links h2 {
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.site-footer__links a {
  color: var(--color-muted);
  font-size: 0.8rem;
}

.site-footer__links a:hover {
  color: var(--color-primary-dark);
}

.site-footer__actions {
  display: grid;
  align-content: start;
  gap: 12px;
}

.site-footer__bottom {
  display: flex;
  margin-top: 55px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--color-muted);
  font-size: 0.72rem;
}

.site-footer__bottom div {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.page-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-primary-dark);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

/* ==================================================
   16. レスポンシブ
================================================== */
@media (max-width: 1120px) {
  .global-navigation__list {
    gap: 16px;
  }

  .global-navigation__actions .button {
    padding-inline: 13px;
  }

  .hero {
    min-height: 680px;
  }

  .reason-card {
    padding-inline: 18px;
  }

  .studio-data {
    grid-template-columns: 1fr;
  }

  .studio-data__image {
    min-height: 460px;
  }

  .recommended__layout {
    gap: 40px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 72px;
  }

  .section {
    padding: 88px 0;
  }

  .menu-button {
    display: block;
  }

  .menu-button[aria-expanded="true"] .menu-button__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-button[aria-expanded="true"] .menu-button__line:nth-child(2) {
    opacity: 0;
  }

  .menu-button[aria-expanded="true"] .menu-button__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .global-navigation {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    display: grid;
    width: min(88%, 420px);
    align-content: start;
    gap: 30px;
    padding: 40px 28px;
    overflow-y: auto;
    background: var(--color-white);
    box-shadow: -15px 20px 35px rgba(47, 43, 52, 0.13);
    transform: translateX(105%);
    transition: transform var(--transition);
  }

  .global-navigation.is-open {
    transform: translateX(0);
  }

  .global-navigation__list {
    display: grid;
    gap: 0;
  }

  .global-navigation__list li {
    border-bottom: 1px solid var(--color-border);
  }

  .global-navigation__list a {
    display: block;
    padding: 16px 4px;
  }

  .global-navigation__actions {
    display: grid;
  }

  .hero::before {
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.96) 0%,
      rgba(255, 255, 255, 0.78) 55%,
      rgba(255, 255, 255, 0.28) 100%
    );
  }

  .hero__image img {
    object-position: 58% center;
  }

  .trial-bar__inner {
    flex-wrap: wrap;
  }

  .trial-bar__content {
    min-width: calc(100% - 125px);
  }

  .trial-bar .button {
    width: 100%;
  }

  .reason-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reason-card {
    border-bottom: 1px solid var(--color-border);
  }

  .reason-card:nth-child(2) {
    border-right: 0;
  }

  .reason-card:nth-child(3),
  .reason-card:nth-child(4) {
    border-bottom: 0;
  }

  .recommended__layout {
    grid-template-columns: 1fr;
  }

  .lesson-grid,
  .price-grid {
    grid-template-columns: 1fr;
  }

  .price-card {
    min-height: auto;
  }

  .price-card--featured {
    transform: none;
  }

  .contact-cta__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }

  .contact-cta__actions {
    width: min(100%, 420px);
  }

  .contact-cta__actions .button {
    width: 100%;
  }

  .site-footer__main {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 28px), var(--container-width));
  }

  .site-header__inner {
    width: min(calc(100% - 28px), 1380px);
  }

  .site-logo__mark {
    width: 40px;
    height: 40px;
  }

  .site-logo__mark img {
    width: 98px;
  }

  .hero {
    min-height: 720px;
    align-items: flex-end;
  }

  .hero::before {
    background:
      linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.2) 0%,
        rgba(255, 255, 255, 0.92) 46%,
        rgba(255, 255, 255, 1) 100%
      );
  }

  .hero__image img {
    height: 55%;
    object-position: 55% center;
  }

  .hero__content {
    padding-top: 310px;
    padding-bottom: 85px;
  }

  .hero h1 {
    font-size: clamp(2.15rem, 10vw, 3.4rem);
    line-height: 1.5;
  }

  .hero__lead br {
    display: none;
  }

  .hero-benefits {
    gap: 7px;
  }

  .hero-benefits li {
    min-height: 105px;
    border-radius: var(--radius-medium);
  }

  .hero-benefits__icon {
    font-size: 1.5rem;
  }

  .hero-benefits strong {
    font-size: 0.67rem;
  }

  .hero-benefits span:last-child {
    display: none;
  }

  .trial-bar {
    margin-top: -36px;
  }

  .trial-bar__inner {
    gap: 18px;
    padding: 20px;
  }

  .trial-bar__badge {
    width: 66px;
    height: 66px;
    font-size: 0.82rem;
  }

  .trial-bar__content {
    min-width: calc(100% - 84px);
  }

  .trial-bar__price {
    gap: 10px;
  }

  .trial-bar__old-price {
    font-size: 0.8rem;
  }

  .button--wide {
    min-width: 0;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  .section-heading__en {
    top: -22px;
    font-size: 3.3rem;
  }

  .section-heading--left .section-heading__en {
    left: 0;
  }

  .reason-grid {
    grid-template-columns: 1fr;
  }

  .reason-card,
  .reason-card:nth-child(3) {
    padding-block: 26px;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .reason-card:last-child {
    border-bottom: 0;
  }

  .studio-data__image {
    min-height: 320px;
  }

  .studio-data__content {
    padding: 70px 20px;
  }

  .data-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .data-grid > div {
    min-height: 125px;
  }

  .data-grid strong {
    font-size: 2rem;
  }

  .recommended__cards {
    grid-template-columns: 1fr;
  }

  .image-card img {
    aspect-ratio: 16 / 10;
  }

  .lesson-card {
    min-height: 0;
  }

  .price-card {
    padding-inline: 24px;
  }

  .contact-cta h2 strong {
    display: block;
    margin: 8px 0 0;
  }

  .site-footer__main,
  .site-footer__links {
    grid-template-columns: 1fr;
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-top {
    right: 14px;
    bottom: 14px;
  }
}

/* ==================================================
   17. 動きを減らす設定
================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}