/* ============================================================
  ティザーサイト CSS（案B：FV／メッセージエリア リニューアル）
  設計方針：
  ・モバイルファースト（スマホの見た目を基準に書き、
    画面が広くなるごとに @media (min-width: ...) で調整を足す）
  ・色は冒頭の「デザイン変数」にまとめてあるので、
    配色調整はここだけ書き換えれば全体に反映されます
============================================================ */

/* ------------------------------------------------------------
  0. デザイン変数（トンマナのコントロールパネル）
------------------------------------------------------------ */
:root {
  /* カラー：ベース */
  --color-primary: #009fe8;      /* ロゴのブルー（アクセント・ボタン等） */
  --color-primary-dark: #0077b3; /* ボタンhover等の濃色 */
  --color-text: #231815;         /* ロゴの黒（本文・見出し） */
  --color-bg: #ffffff;           /* ベース背景 */
  --color-bg-soft: #f5f7f8;      /* セクション区切り用の薄グレー背景 */
  --color-border: #e3e6e8;

  /* カラー：キャッチコピーボックスのグラデーション（ファーストビュー1-b.png参照抽出） */
  --color-catch-1: #1b3f8f; /* ディープブルー */
  --color-catch-2: #6a3f9e; /* バイオレット */
  --color-catch-3: #c62d6c; /* マゼンタピンク */
  --gradient-catch: linear-gradient(120deg, var(--color-catch-1) 0%, var(--color-catch-2) 55%, var(--color-catch-3) 100%);

  /* カラー：FVナビゲーションエリアのグラデーション（ファーストビュー2.png参照抽出） */
  --color-nav-1: #0b2d5c; /* ダークネイビー（上端） */
  --color-nav-2: #155a96; /* ミッドブルー */
  --color-nav-3: #2f8fcf; /* ブライトブルー（下端） */
  --gradient-nav: linear-gradient(180deg, var(--color-nav-1) 0%, var(--color-nav-2) 60%, var(--color-nav-3) 100%);

  /* フォント */
  --font-base: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-hand: "Caveat", cursive; /* COMING SOON用の手書き風フォント */

  /* レイアウト */
  --content-width: 680px;
  --content-width-wide: 1080px; /* FV・メッセージエリア等、広めに見せるセクション用 */
  --space-section: clamp(48px, 8vw, 96px);
}

/* ------------------------------------------------------------
  1. リセット・ベース
------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  line-break: strict;
  overflow-wrap: break-word;
  padding-bottom: 56px; /* スマホ固定フッターバーの高さぶんの余白（PCは900pxリザタリシガーやで解除） */
}

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

a {
  color: var(--color-primary);
}

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

h1, h2 {
  margin: 0;
}

.message__inner,
.instagram__inner,
.footer__inner {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.message__inner {
  max-width: var(--content-width-wide);
}

.section-title {
  font-size: clamp(1.25rem, 4vw, 1.5rem);
  text-align: center;
  margin-bottom: 1.5em;
  letter-spacing: 0.05em;
}

/* ------------------------------------------------------------
  2. ヒーローエリア（FV）
  写真スライドショー＋ナビゲーションエリアの2カラム構成。
  スマホ幅：縦積み（写真→ナビ）／900px以上：横並び（ナビ左・写真右）
------------------------------------------------------------ */
.hero__layout {
  display: flex;
  flex-direction: column;
}

/* --- 2-1. 写真スライドショー --- */
.hero__stage {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--color-nav-1);
}

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 16px;
}

.hero__slide.is-active {
  opacity: 1;
}

/* プレースホルダー用の縞模様。実写画像に差し替える際はこのbackgroundを削除し、
   background-image: url(...) / background-size: cover を指定してください */
.hero__slide--2 { background: repeating-linear-gradient(135deg, #1a4f92 0 24px, #2670b8 24px 48px); }
.hero__slide--3 { background: repeating-linear-gradient(135deg, #0b2d5c 0 24px, #123a72 24px 48px); }
.hero__slide--4 { background: repeating-linear-gradient(135deg, #2670b8 0 24px, #3d8ed6 24px 48px); }

.hero__slide-label {
  font-family: monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.55);
  text-align: right;
}

.hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(8, 20, 40, 0.15) 0%, rgba(8, 20, 40, 0.55) 100%);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 14px;
  padding: 28px 24px;
}

.hero__coming-soon {
  font-family: Helvetica, var(--font-hand);
  font-weight: 700;
  font-size: 22px;
  color: #ffffff;
  margin: 100px 0 0;
  line-height: 1;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

.hero__catch-box {
  display: inline-block;
  background: var(--gradient-catch);
  padding: 5px 15px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.hero__catch {
  color: #ffffff;
  font-weight: 700;
  font-size: 22px;
  line-height: 1.5;
}

/* 「鉄を通じて」「様々な体験ができる」のグレノ：スマホは完全に独立した2つのボッガニーとして余白をあけて縦に並べ、各ボッカスの幅はコンテンツにフィットさせる */
.hero__catch-line1 {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.hero__schedule {
  display: inline-block;
  margin: 0;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.35);
  color: #ffffff;
  font-size: clamp(0.8125rem, 2.5vw, 0.9375rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* --- 2-2. ナビゲーションエリア（PC専用・グレードボックスの縦並びナビ） --- */
.hero__nav {
  display: none;
}

.hero__nav-logo {
  background: #ffffff;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__nav-logo img {
  width: 72px;
  height: auto;
}

.hero__nav-menu {
  list-style: none;
  margin: 0;
  padding: 20px 24px;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 16px 32px;
}

.hero__nav-menu a {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  min-height: 48px;
  color: #ffffff;
  text-decoration: none;
}

.hero__nav-menu-en {
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
}

.hero__nav-menu-jp {
  font-size: 0.75rem;
  opacity: 0.85;
}

.hero__nav-sitelink {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-size: 0.8125rem;
  text-decoration: none;
}

.hero__nav-instagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 150px;
  padding: 0 16px;
  background: #1a1a1a;
  color: #ffffff;
  font-weight: 700;
  font-size: 19px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease;
}

.hero__nav-instagram:hover {
  background: #ffffff;
  color: #1A1A1A;
}

.hero__nav-instagram-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
}

/* --- スマホ専用：トプバー（ロゴ＋ハンバーガー）・フルスクリーンメニュー・固定フッターバー --- */
.hero__mobile-topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 0;
}

.hero__mobile-logo {
  background: #ffffff;
  padding: 8px 12px;
  display: flex;
  align-items: center;
}

.hero__mobile-logo img {
  width: 170px;
  height: auto;
}

.hero__mobile-menu-btn {
  width: 48px;
  height: 48px;
  border: none;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  position: relative;
}

.hero__mobile-menu-btn-line {
  width: 22px;
  height: 2px;
  background: #ffffff;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* 開いているときは3本線ボタン自体を隠す（×はメニュー内の .hero__mobile-menu-close が担当） */
.hero__mobile-menu-btn.is-open {
  visibility: hidden;
}

/* 閉じるボタン：メニューオーバーレイ直下に置き、画面右上に固定表示する */
.hero__mobile-menu-close {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 100;
  width: 48px;
  height: 48px;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #0B2D5C;
}

.hero__mobile-menu {
  display: none;
  flex-direction: column;
  position: fixed;
  inset: 0;
  z-index: 30;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: var(--gradient-nav);
  padding: 0;
  overflow-y: auto;
}

.hero__mobile-menu.is-open {
  display: flex;
}

/* 上部グループ：ロゴ＋Instagramバナーを白背景で区切る */
.hero__mobile-menu-top {
  background: #ffffff;
  padding: 24px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.hero__mobile-menu-logo img {
  width: 200px;
  height: auto;
}

.hero__mobile-menu-note {
  position: relative;
  margin: 8px 0 14px;
  padding: 10px 20px;
  width: 100%;
  background: var(--color-nav-1);
  color: #ffffff;
  font-size: 18px;
  font-weight: 700;
  text-align: center;
  line-height: 1.5;
}

/* 帯の下辺中央の三角形（吹き出し風） */
.hero__mobile-menu-note::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--color-nav-1);
}

.hero__mobile-menu-instagram {
  display: block;
  width: 100%;
  text-decoration: none;
}

.hero__mobile-menu-instagram img {
  width: 100%;
  height: auto;
}

.hero__mobile-menu-links {
  padding: 8px 24px 24px;
  display: flex;
  flex-direction: column;
}

.hero__mobile-menu a {
  display: flex;
  align-items: center;
  min-height: 48px;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
}

.hero__mobile-menu-links a {
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.hero__fixed-instagram-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 56px;
  background: linear-gradient(45deg, #f9ce34, #ee2a7b, #6228d7);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
}

/* ------------------------------------------------------------
  3. メッセージエリア（ABOUT US）
  スマホ幅：縦積み（テキスト→写真）／900px以上：左右2カラム
------------------------------------------------------------ */
.message {
  padding-block: var(--space-section);
  background: var(--color-bg);
}

.message__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: none;
  padding-inline: 0;
}

.message__col--text {
  max-width: var(--content-width-wide);
  margin-inline: auto;
  padding-inline: 24px;
  width: 100%;
}

.message__heading {
  margin-bottom: 32px;
}

.message__heading-en {
  margin: 0 0 12px;
  font-size: 50px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: #000101;
  text-align: center;
}

.message__heading-jp {
  margin: 0;
  text-align: center;
}

.message__heading-jp span {
  display: inline-block;
  position: static;
  background: var(--gradient-catch);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  padding: 5px 20px;
  letter-spacing: 0.02em;
  text-align: center;
}

.message__body-text {
  font-size: 18px;
  font-weight: 700;
  line-height: 37px;
  text-align: center;
  margin: 0 0 1.5em;
}

.message__body-text:last-child {
  margin-bottom: 0;
}

/* PCのみ改行（「、」後などで救行）。スマホは自然な文の流れに任せる */
.u-pc-break {
  display: none;
}

/* スマホのみ改行（PCでは非表示） */
.u-sp-break {
  display: inline;
}

/* Instagram誘導コーナーの改行は、3カラム横並びに切り替わる1100pxまで維持する */
.u-sp-break-ig {
  display: inline;
}

/* --- 写真の自動横スクロール帯 --- */
.message__marquee {
  width: 100%;
  overflow: hidden;
}

.message__marquee-track {
  display: flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  animation: message-marquee 30s linear infinite;
}

@keyframes message-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); } /* トラックは6枚を2セット複製した構成なので、半分移動でシームレスにループ */
}

.message__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.message__photo {
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  font-family: monospace;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* 写真ごとに異なるサイズ（6枚パターンの繰り返し）。スマホは画面幅の70%を基準にvwで拡大、縦横比はaspect-ratioで維持 */
.message__photo:nth-child(6n+1) { width: 70vw; aspect-ratio: 168 / 220; }
.message__photo:nth-child(6n+2) { width: 72vw; aspect-ratio: 173 / 140; }
.message__photo:nth-child(6n+3) { width: 54vw; aspect-ratio: 130 / 220; }
.message__photo:nth-child(6n+4) { width: 30vw; aspect-ratio: 73 / 139; }
.message__photo:nth-child(6n+5) { width: 70vw; aspect-ratio: 168 / 220; }
.message__photo:nth-child(6n) { width: 72vw; aspect-ratio: 173 / 140; }

/* ------------------------------------------------------------
  ACCESSエリア
  スマホ幅：縦積み（見出し→マップ→テキスト）／1100px以上：左マップ・右テキストの2カラム
------------------------------------------------------------ */
.access {
  padding-block: var(--space-section);
  background: var(--color-bg);
}

.access__inner {
  max-width: var(--content-width-wide);
  margin-inline: auto;
  padding-inline: 24px;
}

.access__heading {
  margin-bottom: 32px;
}

.access__heading-en {
  margin: 0 0 12px;
  font-size: 50px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: #000101;
  text-align: center;
}

.access__heading-jp {
  margin: 0;
  text-align: center;
}

.access__heading-jp span {
  display: inline-block;
  background: var(--gradient-catch);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  padding: 5px 20px;
  letter-spacing: 0.02em;
}

.access__body {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.access__map {
  aspect-ratio: 4 / 3;
}

.access__map iframe {
  width: 100%;
  height: 100%;
  display: block;
}

.access__info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.access__block-title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-nav-2);
  letter-spacing: 0.04em;
}

.access__block-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
}

@media (min-width: 900px) {
  .access__heading-en {
    font-size: 90px;
  }

  .access__heading-jp span {
    font-size: 20px;
  }

  .access__body {
    flex-direction: row;
    align-items: stretch;
    gap: 48px;
  }

  .access__map {
    flex: 1 1 55%;
    aspect-ratio: 16 / 11;
  }

  .access__info {
    flex: 1 1 45%;
    justify-content: center;
    gap: 28px;
  }

  .access__block-title {
    font-size: 17px;
  }

  .access__block-text {
    font-size: 17px;
  }
}

/* ------------------------------------------------------------
  4. Instagramエリア
------------------------------------------------------------ */
.instagram {
  padding: 50px 0 48px;
  background: linear-gradient(180deg, #f2f7fc 0%, #e7f0fa 100%);
}

.instagram__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}

.instagram__title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-size: clamp(1.25rem, 5.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-nav-1);
}

.instagram__title-icon {
  flex-shrink: 0;
}

.instagram__lead {
  margin: 0;
  font-size: 18px;
  line-height: 1.9;
}

.instagram__mock {
  width: min(50vw, 196px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn--instagram {
  background: linear-gradient(45deg, #f9ce34, #ee2a7b, #6228d7);
  color: #ffffff;
}

.btn--instagram:hover {
  color: #ffffff;
  transform: translateY(-4px);
  box-shadow: 0 12px 26px rgba(98, 40, 215, 0.4);
}

.btn__icon {
  flex-shrink: 0;
}

/* ------------------------------------------------------------
  5. フッター
------------------------------------------------------------ */
.footer {
  padding-block: 40px;
  background: var(--color-nav-1);
  color: #ffffff;
  text-align: center;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer__logo-box {
  background: #ffffff;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.footer__logo {
  width: 110px;
  height: auto;
}

.footer__info {
  margin: 0 0 24px;
  font-size: 0.8125rem;
  line-height: 2;
}

.footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.footer__row dt {
  opacity: 0.7;
  text-align: right;
}

.footer__row dd {
  margin: 0;
  text-align: left;
}

.footer__company {
  font-size: 1.125rem;
  font-weight: 700;
}

.footer__row dd a {
  color: #ffffff;
}

.footer__row dd a:hover {
  color: rgba(255, 255, 255, 0.75);
}

.footer__site {
  margin-bottom: 24px;
}

.footer__site-label {
  margin: 0 0 10px;
  font-size: 0.8125rem;
  opacity: 0.8;
}

.footer__site-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
  min-width: 260px;
  padding: 10px 20px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
}

.footer__site-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.footer__copyright {
  display: block;
  font-size: 0.6875rem;
  opacity: 0.6;
}

/* ============================================================
  6. レスポンシブ調整
============================================================ */

/* タブレット以上：600px〜 */
@media (min-width: 600px) {
  .hero__nav-menu {
    padding: 24px 32px;
    gap: 20px 40px;
  }

  .footer__row {
    justify-content: center;
  }
}
@media (min-width: 900px) {
  .message__marquee-track {
    gap: 70px;
  }

  body {
    padding-bottom: 0;
  }

  .hero__mobile-topbar,
  .hero__fixed-instagram-bar {
    display: none;
  }

  .to-top {
    right: 24px;
    bottom: 24px;
  }

  .sticky-header__logo-sp {
    display: none;
  }

  .sticky-header__logo-pc {
    display: block;
  }

  .sticky-header__logo {
    width: 150px;
    padding: 10px 16px;
  }

  /* PCのメニューは画面右からスライドインするドロワー型（幅450px） */
  .hero__mobile-menu {
    left: auto;
    right: 0;
    width: 450px;
    max-width: 90vw;
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.3);
  }

  /* メニュー以外の背景を暗い半透明オーバーレイで覆う */
  .hero__mobile-menu::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(8, 20, 40, 0.6);
  }

  /* Instagram\u8a98\u5c0e\u30b3\u30fc\u30ca\u30fc\uff1a\u5de6\u30c6\u30ad\u30b9\u30c8\uff0f\u4e2d\u592e\u30e2\u30c3\u30af\u30a2\u30c3\u30d7\uff0f\u53f3\u30dc\u30bf\u30f3\u306e3\u30ab\u30e9\u30e0 */
  .u-sp-break {
    display: none;
  }

  .instagram__action .btn {
    padding: 18px 32px;
    font-size: 1.0625rem;
  }

  /* \u30d5\u30c3\u30bf\u30fc\uff1a\u30ed\u30b4\uff0b\u4f1a\u793e\u60c5\u5831\uff0b\u30b5\u30a4\u30c8\u30ea\u30f3\u30af\u306e\u6a2a\u4e26\u3073 */
  .footer__inner {
    max-width: var(--content-width-wide);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 40px;
    text-align: left;
  }

  .footer__logo-box {
    margin: 0;
  }

  .footer__info {
    margin: 0;
    padding-left: 40px;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    font-size: 0.9375rem;
  }

  .footer__row {
    justify-content: flex-start;
    align-items: center;
    flex-wrap: nowrap;
    gap: 8px;
  }

  .footer__row dt {
    flex: 0 0 auto;
  }

  .footer__row dd {
    flex: 1 1 auto;
    min-width: 0;
  }

  .footer__row:first-child {
    margin-bottom: 4px;
  }

  .footer__row dt {
    text-align: left;
  }

  .footer__row:not(:first-child) dt::after {
    content: "\FF1A";
  }

  .footer__site {
    margin: 0;
  }

  .footer__copyright {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
  }

  .hero__nav {
    display: flex;
    flex-direction: column;
    background: var(--gradient-nav);
  }

  .hero__catch-line1 {
    display: inline-block;
    background: var(--gradient-catch);
    padding: 14px 22px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  }

  .hero__catch-line1 .hero__catch-box {
    display: inline;
    background: none;
    padding: 0;
    box-shadow: none;
  }

  .hero__catch-line1 .hero__catch {
    display: inline;
  }

  .hero__coming-soon {
    font-size: 30px;
    margin: 0;
  }

  /* 写真カラム幅に比例して縮む文字サイズ（1125px以上で上限36px）。語中改行は禁止 */
  .hero__catch {
    font-size: clamp(28px, 3.2vw, 36px);
    white-space: nowrap;
  }

  .hero__catch-box {
    padding: 14px 22px;
  }

  .message__heading-en {
    font-size: 90px;
  }

  .message__heading-jp span {
    font-size: 20px;
  }

  .message__body-text {
    font-size: 20px;
  }

  .instagram__lead {
    font-size: 20px;
  }

  .hero__mobile-menu-note {
    font-size: 20px;
  }

  .message__photo:nth-child(6n+1) { width: 260px; height: 340px; aspect-ratio: auto; }
  .message__photo:nth-child(6n+2) { width: 268px; height: 217px; aspect-ratio: auto; }
  .message__photo:nth-child(6n+3) { width: 201px; height: 340px; aspect-ratio: auto; }
  .message__photo:nth-child(6n+4) { width: 112px; height: 214px; aspect-ratio: auto; }
  .message__photo:nth-child(6n+5) { width: 260px; height: 340px; aspect-ratio: auto; }
  .message__photo:nth-child(6n) { width: 268px; height: 217px; aspect-ratio: auto; }

  .hero__layout {
    flex-direction: row-reverse;
    min-height: 100vh;
  }

  .hero__stage {
    flex: 1;
    aspect-ratio: auto;
  }

  .hero__nav {
    width: 280px;
    flex-shrink: 0;
  }

  .hero__nav-menu {
    flex-direction: column;
    gap: 24px;
    flex: 1;
  }

  .hero__overlay {
    padding: 48px 64px;
    gap: 20px;
  }

  .btn {
    padding: 14px 36px;
    font-size: 1rem;
  }
}


/* 広めのPC：1100px〜。3カラム横並びは合計幅（約960px）が収まるこの幅から */
@media (min-width: 1100px) {
  /* PC用の改行位置は、最長行（約858px）が1行に収まるこの幅から有効にする */
  .u-pc-break {
    display: inline;
  }

  .u-sp-break-ig {
    display: none;
  }

  .instagram {
    padding: 50px 0 0;
  }

  .instagram__inner {
    max-width: none;
    padding: 0;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0;
    text-align: left;
  }

  .instagram__text {
    flex: 0 1 528px;
    min-width: 0;
    max-width: 528px;
    padding: 40px 24px;
  }

  .instagram__lead {
    max-width: 480px;
  }

  .instagram__mock {
    flex: 0 0 auto;
    width: clamp(170px, 20vw, 240px);
    align-self: flex-end;
    margin-top: 40px;
  }

  .instagram__mock img {
    display: block;
    margin-bottom: -4px;
  }

  .instagram__action {
    flex: 0 0 auto;
    padding: 40px 24px;
  }

  .instagram__action .btn {
    white-space: nowrap;
  }

  .instagram__title {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    font-size: 30px;
  }

}

/* ------------------------------------------------------------
  固定ヘッダー（スクロールで出現。PC・スマホ共通で小さいロゴ＋ハンバーガー）
------------------------------------------------------------ */
.sticky-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 25;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  transform: translateY(-100%);
  transition: transform 0.3s ease, opacity 0.3s ease;
  opacity: 0;
  pointer-events: none;
}

.sticky-header.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.sticky-header__logo {
  background: #ffffff;
  width: 150px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.sticky-header__logo img {
  width: 100%;
  height: auto;
}

/* ロゴの出し分け（カスケード順に依存しないよう幅で明示的に指定） */
@media (max-width: 899px) {
  .sticky-header__logo-pc {
    display: none;
  }
}

.sticky-header__menu-btn {
  width: 48px;
  height: 48px;
  border: none;
  background: var(--color-nav-1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.sticky-header__menu-btn.is-open {
  visibility: hidden;
}

/* ------------------------------------------------------------
  トップに戻るボタン（スマホは固定Instagramバーの上に出る）
------------------------------------------------------------ */
.to-top {
  position: fixed;
  right: 16px;
  bottom: 72px;
  z-index: 22;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--color-nav-1);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}