/* ===========================
   MBBS — Concept Page
   =========================== */

/* ── TOPBAR リンク ── */
.topbar-home {
  font-size: clamp(0.8rem, 1.8vw, 1rem);
  letter-spacing: 0.25em;
  color: #ffffff;
  text-decoration: none;
  text-shadow:
    0 0 8px rgba(92,255,151,0.9),
    0 0 20px rgba(72,255,149,0.6),
    0 0 40px rgba(46,255,138,0.4);
  transition: color 0.3s;
}
.topbar-home:hover { color: var(--gold); }

/* ── CONCEPT HERO ── */
#concept-hero {
  position: relative;
  padding: 120px 24px 80px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 8%, rgba(102, 255, 163, 0.2) 0%, rgba(102, 255, 163, 0.08) 18%, rgba(0, 0, 0, 0) 42%),
    radial-gradient(circle at 18% 14%, rgba(64, 168, 108, 0.18) 0%, rgba(64, 168, 108, 0.06) 20%, rgba(0, 0, 0, 0) 38%),
    radial-gradient(circle at 84% 12%, rgba(30, 58, 110, 0.2) 0%, rgba(30, 58, 110, 0.08) 18%, rgba(0, 0, 0, 0) 36%),
    linear-gradient(180deg, rgba(17, 34, 26, 0.72) 0%, rgba(11, 23, 17, 0.28) 100%);
  animation: fadeUp 1s ease both;
}

#concept-hero::before,
#concept-hero::after {
  position: absolute;
  inset: auto;
  border-radius: 999px;
  pointer-events: none;
  content: "";
}

#concept-hero::before {
  top: -90px;
  left: 50%;
  width: 420px;
  height: 180px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(98, 255, 163, 0.28) 0%, rgba(98, 255, 163, 0.08) 36%, rgba(98, 255, 163, 0) 70%);
  filter: blur(24px);
  animation: heroGlow 7s ease-in-out infinite;
}

#concept-hero::after {
  right: 72px;
  top: 58px;
  width: 88px;
  height: 88px;
  border: 1px solid rgba(201, 168, 76, 0.2);
  background: radial-gradient(circle, rgba(201, 168, 76, 0.12) 0%, rgba(201, 168, 76, 0) 68%);
  box-shadow: 0 0 26px rgba(201, 168, 76, 0.12);
  opacity: 0.58;
}

#concept-hero .section-label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  padding: 10px 18px;
  border: 1px solid rgba(102, 255, 163, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: #d4e7dc;
  font-size: clamp(0.82rem, 1.8vw, 1rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02),
    0 0 24px rgba(72, 255, 149, 0.08);
}

#concept-hero .section-label::before,
#concept-hero .section-label::after {
  width: 16px;
  height: 1px;
  background: linear-gradient(90deg, rgba(102, 255, 163, 0), rgba(102, 255, 163, 0.86));
  content: "";
}

#concept-hero .section-label::after {
  transform: rotate(180deg);
}

.concept-title {
  position: relative;
  z-index: 1;
  font-size: clamp(2.4rem, 6vw, 4rem);
  color: var(--gold);
  font-weight: 400;
  letter-spacing: 0.18em;
  margin-bottom: 30px;
  text-shadow:
    0 0 18px rgba(201, 168, 76, 0.24),
    0 0 42px rgba(98, 255, 163, 0.12),
    0 0 72px rgba(72, 255, 149, 0.08);
  animation: conceptTitleGlow 3.8s ease-in-out infinite;
}

#concept-hero .divider {
  position: relative;
  z-index: 1;
  width: min(280px, 54vw);
  height: 2px;
  margin-bottom: 34px;
  background:
    linear-gradient(90deg,
      rgba(102, 255, 163, 0) 0%,
      rgba(102, 255, 163, 0.58) 18%,
      rgba(201, 168, 76, 0.96) 50%,
      rgba(102, 255, 163, 0.58) 82%,
      rgba(102, 255, 163, 0) 100%);
  box-shadow:
    0 0 14px rgba(102, 255, 163, 0.18),
    0 0 22px rgba(201, 168, 76, 0.18);
}

.concept-lead {
  position: relative;
  z-index: 1;
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 0;
  font-size: clamp(1rem, 2.4vw, 1.4rem);
  color: var(--ivory);
  line-height: 1.95;
  letter-spacing: 0.1em;
  text-shadow:
    0 0 12px rgba(102, 255, 163, 0.08);
}

/* ── CONCEPT BODY ── */
#concept-body { padding: 60px 24px 120px; }

.concept-inner {
  max-width: 860px;
  margin: 0 auto;
}

.concept-block {
  margin-bottom: 100px;
  text-align: center;
}

.concept-text {
  font-size: clamp(0.92rem, 2vw, 1.05rem);
  color: var(--ivory);
  line-height: 2.5;
  letter-spacing: 0.06em;
  text-align: left;
}

@keyframes heroGlow {
  0%, 100% {
    opacity: 0.86;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateX(-50%) scale(1.08);
  }
}

@keyframes conceptTitleGlow {
  0%, 100% {
    text-shadow:
      0 0 18px rgba(201, 168, 76, 0.2),
      0 0 42px rgba(98, 255, 163, 0.1),
      0 0 72px rgba(72, 255, 149, 0.06);
    transform: scale(1);
  }
  50% {
    text-shadow:
      0 0 24px rgba(201, 168, 76, 0.34),
      0 0 56px rgba(120, 255, 170, 0.2),
      0 0 92px rgba(92, 255, 151, 0.14);
    transform: scale(1.035);
  }
}

/* ── INFOGRAPHIC 共通 ── */
.ig-section {
  padding: 90px 0;
  border-top: 1px solid rgba(201,168,76,0.15);
  text-align: center;
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.9s ease, transform 0.9s ease;
  margin-bottom: 0;
}
.ig-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.ig-number {
  font-size: 0.8rem;
  letter-spacing: 0.5em;
  color: var(--gold);
  margin-bottom: 14px;
  font-family: var(--font-en);
}

.ig-title {
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
  color: var(--ivory);
  font-weight: 400;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.ig-title-en {
  font-family: var(--font-en);
  font-size: clamp(0.8rem, 1.6vw, 0.95rem);
  color: var(--gold);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: 20px;
  opacity: 0.72;
}

.ig-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--ivory-dim);
  letter-spacing: 0.08em;
  margin-bottom: 64px;
}

.ig-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.ig-caption {
  max-width: 560px;
  margin: 56px auto 0;
  font-size: 0.95rem;
  color: var(--ivory-dim);
  line-height: 2.2;
  letter-spacing: 0.05em;
}

.ig-caption--lead {
  max-width: 720px;
}

.ig-caption__typed {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  color: var(--ivory);
  line-height: 2.05;
  letter-spacing: 0.07em;
}

/* ══════════════════════════════════════
   INFOGRAPHIC 01: 三円統合図（Venn）
   ══════════════════════════════════════ */
.venn-svg {
  width: min(500px, 92vw);
  overflow: visible;
}

/* 各円：transform-box で自分の中心基点に */
.vc {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: vcFadeIn 1s cubic-bezier(0.22,1,0.36,1) forwards;
}
.vc1 {
  animation:
    vcFadeIn 1s cubic-bezier(0.22,1,0.36,1) 0.2s forwards,
    vcPulseTop 6.2s ease-in-out 1.6s infinite;
}
.vc2 {
  animation:
    vcFadeIn 1s cubic-bezier(0.22,1,0.36,1) 0.7s forwards,
    vcPulseLeft 6.2s ease-in-out 2s infinite;
}
.vc3 {
  animation:
    vcFadeIn 1s cubic-bezier(0.22,1,0.36,1) 1.2s forwards,
    vcPulseRight 6.2s ease-in-out 2.4s infinite;
}

@keyframes vcFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes vcPulseTop {
  0%, 100% { transform: translateY(0) scale(1); }
  25% { transform: translateY(14px) scale(0.985); }
  50% { transform: translateY(26px) scale(0.97); }
  75% { transform: translateY(12px) scale(0.99); }
}

@keyframes vcPulseLeft {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(14px, -10px) scale(0.985); }
  50% { transform: translate(26px, -20px) scale(0.97); }
  75% { transform: translate(12px, -8px) scale(0.99); }
}

@keyframes vcPulseRight {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(-14px, -10px) scale(0.985); }
  50% { transform: translate(-26px, -20px) scale(0.97); }
  75% { transform: translate(-12px, -8px) scale(0.99); }
}

/* 中心グロー */
.vcg {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: glowIn 1s ease 1.8s forwards, glowPulse 3.5s ease-in-out 2.8s infinite;
}
@keyframes glowIn {
  from { opacity: 0; transform: scale(0.5); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes glowPulse {
  0%,100% { opacity: 0.85; transform: scale(1); }
  50%     { opacity: 1;    transform: scale(1.18); }
}

/* 中心ドット */
.vdot {
  opacity: 0;
  animation: fadeIn 0.6s ease 2.2s forwards;
}

/* 外側ハロー */
.vc-halo {
  opacity: 0;
  animation: fadeIn 1.2s ease 0.5s forwards;
}

/* 回転ダッシュリング */
.vc-ring {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: fadeIn 0.8s ease 1.4s forwards;
}
.vc-ring1 { animation: fadeIn 0.8s ease 1.4s forwards, ringRotateCW 28s linear 2.2s infinite; }
.vc-ring2 { animation: fadeIn 0.8s ease 1.6s forwards, ringRotateCCW 32s linear 2.4s infinite; }
.vc-ring3 { animation: fadeIn 0.8s ease 1.8s forwards, ringRotateCW 36s linear 2.6s infinite; }
@keyframes ringRotateCW  { to { transform: rotate(360deg); } }
@keyframes ringRotateCCW { to { transform: rotate(-360deg); } }

/* 中心内リング */
.vcg-inner {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: glowIn 1s ease 2s forwards, glowPulse 4s ease-in-out 3s infinite;
}

/* ラベル類 */
.vl-ja {
  font-family: var(--font-ja);
  font-size: 34px;
  opacity: 0;
  animation: fadeIn 0.7s ease 1.6s forwards;
}
.vl-gold { fill: #C9A84C; }
.vl-blue { fill: #6a9ae0; }
.vl-green { fill: #4ab880; }

.vl-en {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.7s ease 1.9s forwards;
}
.vl-en-gold { fill: rgba(201,168,76,0.75); }
.vl-en-blue { fill: rgba(106,154,224,0.75); }
.vl-en-green { fill: rgba(74,184,128,0.75); }

.vc-ja {
  font-family: var(--font-ja);
  font-size: 20px;
  fill: #ffffff;
  font-weight: 600;
  filter: drop-shadow(0 0 12px rgba(201,168,76,0.6)) drop-shadow(0 0 4px rgba(255,255,255,0.4));
  opacity: 0;
  animation: fadeIn 0.8s ease 2.2s forwards;
}
.vc-en {
  font-family: var(--font-en);
  font-size: 13px;
  fill: rgba(201,168,76,0.85);
  letter-spacing: 3px;
  text-transform: uppercase;
  filter: drop-shadow(0 0 8px rgba(201,168,76,0.5));
  opacity: 0;
  animation: fadeIn 0.8s ease 2.5s forwards;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ══════════════════════════════════════
   INFOGRAPHIC 02: 叡智×AI 統合軸
   ══════════════════════════════════════ */
.axis-diagram {
  display: flex;
  align-items: center;
  width: min(860px, 94vw);
  gap: 0;
  position: relative;
}

/* ── Left / Right サイド ── */
.axis-side {
  flex: 1;
  padding: 36px 28px;
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.ig-section.visible .axis-left  {
  opacity: 1; transform: translateX(0);
  transition-delay: 0.2s;
}
.ig-section.visible .axis-right {
  opacity: 1; transform: translateX(0);
  transition-delay: 0.4s;
}
.axis-left  { transform: translateX(-30px); }
.axis-right { transform: translateX( 30px); }

.axis-head {
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--ivory);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.axis-head-en {
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 24px;
  font-family: var(--font-en);
}
.axis-tags {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.axis-tags li {
  font-size: 0.9rem;
  color: var(--ivory-dim);
  letter-spacing: 0.05em;
  padding: 10px 0;
  border-bottom: 1px solid rgba(201,168,76,0.12);
  line-height: 1.6;
}
.axis-tags li:last-child { border-bottom: none; }

/* ── Center ── */
.axis-mid {
  flex: 0 0 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  position: relative;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.7s ease 0.6s, transform 0.7s ease 0.6s;
  transform: scale(0.8);
}
.ig-section.visible .axis-mid {
  opacity: 1;
  transform: scale(1);
}

.axis-line-wrap {
  display: flex;
  align-items: center;
  width: 100%;
}
.axis-line-l,
.axis-line-r {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(201,168,76,0.5));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.8s ease;
}
.axis-line-r {
  background: linear-gradient(to left, transparent, rgba(201,168,76,0.5));
  transform-origin: right;
}
.ig-section.visible .axis-line-l,
.ig-section.visible .axis-line-r {
  transform: scaleX(1);
  transition-delay: 0.8s;
}

.axis-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 130px;
  height: 130px;
  border: 1px solid rgba(201,168,76,0.7);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,168,76,0.10) 0%, var(--green-dark) 70%);
  box-shadow:
    0 0 32px rgba(201,168,76,0.30),
    0 0 64px rgba(201,168,76,0.14),
    0 0 96px rgba(201,168,76,0.06),
    inset 0 0 28px rgba(201,168,76,0.08);
  animation: nodePulse 3.5s ease-in-out 1.5s infinite;
  flex-shrink: 0;
  position: relative;
}
.axis-node::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(201,168,76,0.18);
}
.axis-node::after {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid rgba(201,168,76,0.08);
}
@keyframes nodePulse {
  0%,100% {
    box-shadow: 0 0 32px rgba(201,168,76,0.28), 0 0 64px rgba(201,168,76,0.12), inset 0 0 28px rgba(201,168,76,0.06);
  }
  50% {
    box-shadow: 0 0 48px rgba(201,168,76,0.52), 0 0 96px rgba(201,168,76,0.26), inset 0 0 36px rgba(201,168,76,0.14);
  }
}
.axis-node-name {
  font-size: 1.4rem;
  color: var(--gold);
  letter-spacing: 0.24em;
  font-family: var(--font-en);
  text-shadow: 0 0 14px rgba(201,168,76,0.7), 0 0 28px rgba(201,168,76,0.3);
}
.axis-node-sub {
  font-size: 0.92rem;
  color: var(--ivory);
  letter-spacing: 0.22em;
  margin-top: 6px;
  text-shadow: 0 0 10px rgba(201,168,76,0.5);
}

.axis-pillars {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--ivory-dim);
  letter-spacing: 0.1em;
}
.axis-pillars-sep { color: rgba(201,168,76,0.4); }

/* ══════════════════════════════════════
   INFOGRAPHIC 03: 変容のレイヤー
   ══════════════════════════════════════ */
.layer-diagram {
  width: min(680px, 94vw);
  text-align: left;
}

.layer-row {
  display: flex;
  align-items: center;
  gap: 20px;
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.ig-section.visible .layer-row[data-d="0"] { opacity:1; transform:none; transition-delay:0.1s; }
.ig-section.visible .layer-row[data-d="1"] { opacity:1; transform:none; transition-delay:0.3s; }
.ig-section.visible .layer-row[data-d="2"] { opacity:1; transform:none; transition-delay:0.5s; }
.ig-section.visible .layer-row[data-d="3"] { opacity:1; transform:none; transition-delay:0.7s; }
.ig-section.visible .layer-row[data-d="4"] { opacity:1; transform:none; transition-delay:0.9s; }

.layer-num {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  flex-shrink: 0;
  width: 3.8em;
  font-family: var(--font-ja);
  text-align: center;
}

/* 入口層 → 深層 へ深まる色の変化 */
.layer-row[data-d="0"] .layer-num { color: #8a9ea8; }
.layer-row[data-d="1"] .layer-num { color: #5ab890; }
.layer-row[data-d="2"] .layer-num { color: #4a8ac8; }
.layer-row[data-d="3"] .layer-num { color: #8a70c8; }
.layer-row[data-d="4"] .layer-num { color: var(--gold); }

/* ノード：深くなるほどボーダーが太く・グローが強くなる（B） */
.layer-row[data-d="0"] .layer-bar {
  border-left: 2px solid rgba(138,158,168,0.35);
  background: rgba(138,158,168,0.04);
  margin-right: 40%;
}
.layer-row[data-d="1"] .layer-bar {
  border-left: 3px solid rgba(90,184,144,0.55);
  background: rgba(90,184,144,0.05);
  box-shadow: -3px 0 10px rgba(90,184,144,0.10);
  margin-right: 28%;
}
.layer-row[data-d="2"] .layer-bar {
  border-left: 4px solid rgba(74,138,200,0.65);
  background: rgba(74,138,200,0.06);
  box-shadow: -4px 0 16px rgba(74,138,200,0.14);
  margin-right: 16%;
}
.layer-row[data-d="3"] .layer-bar {
  border-left: 5px solid rgba(138,112,200,0.75);
  background: rgba(138,112,200,0.07);
  box-shadow: -5px 0 22px rgba(138,112,200,0.18);
  margin-right: 6%;
}
.layer-row[data-d="4"] .layer-bar {
  border-left: 6px solid var(--gold);
  background: rgba(201,168,76,0.09);
  box-shadow: -6px 0 30px rgba(201,168,76,0.28);
  margin-right: 0;
}

/* ホバー時も各色で光る */
.layer-row[data-d="0"] .layer-bar:hover { border-left-color: #8a9ea8; background: rgba(138,158,168,0.09); }
.layer-row[data-d="1"] .layer-bar:hover { border-left-color: #5ab890; background: rgba(90,184,144,0.10); box-shadow: -3px 0 18px rgba(90,184,144,0.22); }
.layer-row[data-d="2"] .layer-bar:hover { border-left-color: #4a8ac8; background: rgba(74,138,200,0.10); box-shadow: -4px 0 22px rgba(74,138,200,0.26); }
.layer-row[data-d="3"] .layer-bar:hover { border-left-color: #8a70c8; background: rgba(138,112,200,0.10); box-shadow: -5px 0 28px rgba(138,112,200,0.30); }
.layer-row[data-d="4"] .layer-bar:hover { border-left-color: var(--gold); background: rgba(201,168,76,0.14); box-shadow: -6px 0 36px rgba(201,168,76,0.38); }

/* 階層名グロー：各色で発光（C） */
.layer-row[data-d="0"] .layer-num { color: #8a9ea8; text-shadow: 0 0 8px rgba(138,158,168,0.4); }
.layer-row[data-d="1"] .layer-num { color: #5ab890; text-shadow: 0 0 10px rgba(90,184,144,0.5); }
.layer-row[data-d="2"] .layer-num { color: #4a8ac8; text-shadow: 0 0 12px rgba(74,138,200,0.6); }
.layer-row[data-d="3"] .layer-num { color: #8a70c8; text-shadow: 0 0 14px rgba(138,112,200,0.65); }
.layer-row[data-d="4"] .layer-num { color: var(--gold); text-shadow: 0 0 18px rgba(201,168,76,0.8), 0 0 32px rgba(201,168,76,0.4); }

.layer-bar {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-left: 2px solid rgba(201,168,76,0.22);
  background: rgba(255,255,255,0.018);
  transition: border-color 0.3s, background 0.3s;
}
.layer-bar:hover {
  border-left-color: var(--gold);
  background: rgba(201,168,76,0.05);
}
.layer-final .layer-bar {
  border-left-color: var(--gold);
  background: rgba(201,168,76,0.08);
  box-shadow: -4px 0 24px rgba(201,168,76,0.14);
}

.layer-ja {
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  color: var(--ivory);
  letter-spacing: 0.07em;
  flex-shrink: 0;
}
.layer-final .layer-ja { color: var(--gold); }

.layer-en {
  font-size: 0.78rem;
  color: var(--ivory-dim);
  letter-spacing: 0.1em;
  font-family: var(--font-en);
  text-align: right;
}

.layer-conn {
  display: flex;
  justify-content: flex-start;
  padding-left: 46px;
}
.layer-line-v {
  width: 1px;
  height: 20px;
  background: linear-gradient(to bottom, rgba(201,168,76,0.3), rgba(201,168,76,0.1));
}

/* ══════════════════════════════════════
   HISTORY: 歩みタイムライン
   ══════════════════════════════════════ */
.history-timeline {
  position: relative;
  width: min(820px, 94vw);
  margin: 0 auto;
  padding: 20px 0;
}

/* 中央縦ライン */
.history-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom,
    transparent,
    rgba(201,168,76,0.5) 10%,
    rgba(201,168,76,0.5) 90%,
    transparent);
  transform: translateX(-50%);
}

/* 各行 */
.ht-item {
  position: relative;
  display: flex;
  width: 100%;
  margin-bottom: 56px;
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.ht-left  { justify-content: flex-start; transform: translateX(-24px); }
.ht-right { justify-content: flex-end;   transform: translateX( 24px); }

.ig-section.visible .ht-item:nth-child(1) { opacity:1; transform:none; transition-delay:0.15s; }
.ig-section.visible .ht-item:nth-child(2) { opacity:1; transform:none; transition-delay:0.35s; }
.ig-section.visible .ht-item:nth-child(3) { opacity:1; transform:none; transition-delay:0.55s; }

/* ボックス */
.ht-box {
  width: calc(50% - 32px);
  padding: 28px 32px;
  border: 1px solid rgba(201,168,76,0.3);
  background: rgba(201,168,76,0.03);
  transition: border-color 0.3s, background 0.3s;
}
.ht-box:hover {
  border-color: rgba(201,168,76,0.6);
  background: rgba(201,168,76,0.06);
}
.ht-left  .ht-box { text-align: right; }
.ht-right .ht-box { text-align: left;  }

.ht-year {
  font-size: 1.5rem;
  color: var(--gold);
  letter-spacing: 0.12em;
  font-family: var(--font-en);
  margin-bottom: 12px;
  font-weight: 400;
}
.ht-text {
  font-size: 0.92rem;
  color: var(--ivory-dim);
  line-height: 2;
  letter-spacing: 0.05em;
}

/* ダイヤモンド◆ — 常に中央ラインに絶対配置 */
.ht-diamond {
  position: absolute;
  left: 50%;
  top: 32px;
  width: 12px;
  height: 12px;
  background: var(--gold);
  transform: translateX(-50%) rotate(45deg);
  z-index: 1;
  box-shadow:
    0 0 10px rgba(201,168,76,0.6),
    0 0 24px rgba(201,168,76,0.3);
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .history-timeline::before { left: 16px; }
  .ht-item { justify-content: flex-start !important; transform: none !important; padding-left: 44px; }
  .ht-diamond { left: 10px; top: 28px; transform: rotate(45deg); }
  .ht-box { width: 100%; text-align: left !important; }
}

/* ── HISTORY VISION ── */
.history-vision {
  margin-top: 48px;
  padding: 36px 32px;
  border-top: 1px solid rgba(201,168,76,0.2);
  background:
    radial-gradient(circle at 18% 22%, rgba(92,255,151,0.08) 0%, rgba(92,255,151,0.02) 12%, rgba(0,0,0,0) 26%),
    radial-gradient(circle at 82% 18%, rgba(201,168,76,0.08) 0%, rgba(201,168,76,0.02) 10%, rgba(0,0,0,0) 24%),
    radial-gradient(circle at 50% 0%, rgba(70,120,255,0.06) 0%, rgba(70,120,255,0.02) 14%, rgba(0,0,0,0) 34%),
    linear-gradient(180deg, rgba(5, 8, 14, 0.96) 0%, rgba(6, 10, 18, 0.92) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.03),
    0 20px 40px rgba(0,0,0,0.22);
  text-align: center;
}

.history-vision__typed {
  min-height: 12em;
  font-size: 1.05rem;
  line-height: 2;
  color: var(--ivory-dim);
  letter-spacing: 0.06em;
}

.history-vision__cursor {
  display: inline-block;
  width: 0.75em;
  height: 1.1em;
  margin-top: 8px;
  margin-left: 4px;
  vertical-align: middle;
  background: linear-gradient(180deg, rgba(201,168,76,0.9), rgba(92,255,151,0.9));
  box-shadow:
    0 0 10px rgba(201,168,76,0.24),
    0 0 18px rgba(92,255,151,0.16);
  animation: historyCursorBlink 0.9s steps(1) infinite;
}

.history-vision__cursor--done {
  opacity: 0.28;
  animation: none;
}

@keyframes historyCursorBlink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0.12; }
}

/* ── BACK LINK ── */
.back-link-wrap {
  text-align: center;
  padding: 60px 24px 80px;
  border-top: 1px solid rgba(201,168,76,0.12);
}
.back-link {
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  color: var(--ivory-dim);
  text-decoration: none;
  border-bottom: 1px solid rgba(201,168,76,0.3);
  padding-bottom: 4px;
  transition: color 0.3s, border-color 0.3s;
}
.back-link:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .axis-diagram {
    flex-direction: column;
    gap: 32px;
  }
  .axis-left  { transform: none; }
  .axis-right { transform: none; }
  .axis-mid { flex: none; order: -1; }
  .axis-line-l, .axis-line-r { display: none; }
  .layer-en { display: none; }
}