/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  flex-direction: column;
}
.hero-bg { position: absolute; inset: -40px; z-index: -2; }
.hero-mobile-firstview { display: none; }
@media (max-width: 900px) {
  .hero-bg-desktop-only { display: none; }
}
.hero-bg-img {
  position: absolute; inset: 0;
  background-size: cover;
  background-repeat: no-repeat;
  filter: saturate(0.92) brightness(0.62) contrast(1.06);
  will-change: transform;
  image-rendering: -webkit-optimize-contrast;
}
/* ====================================================
   HERO IMAGE — sized to actual portrait (4:5 ratio)
   ----------------------------------------------------
   元画像は 998×1264 のポートレート。
   - Desktop: 画面右側半分に画像、左側にコピー（editorial split）
   - Mobile: 上部に画像、下部に暗いコピー領域（縦積み）
   いずれも cover で頭が切れたり中途半端に拡大されないよう、
   被写体の中心がフレームに残るように position を制御。
   ==================================================== */

/* Desktop: 右半分に画像。被写体（顔）を 60-70% にキープ */
.hero-bg-img-desktop {
  /* 画像は右半分のみに配置 */
  left: auto;
  right: 0;
  top: 0;
  bottom: 0;
  width: 56%;
  background-position: 66% center;
  background-size: cover;
  display: block;
  filter: saturate(0.95) brightness(0.82) contrast(1.06);
}
.hero-bg-img-mobile { display: none; }

@media (max-width: 900px) {
  .hero-bg-img-desktop { display: none; }
  .hero-bg-img-mobile {
    display: block;
    /* モバイルは画像を上半分に。被写体の頭〜机上の本まで見せる */
    left: 0; right: 0; top: 0;
    bottom: auto;
    height: 58vh;
    width: 100%;
    background-position: 60% 35%;
    background-size: cover;
    filter: saturate(0.95) brightness(0.78) contrast(1.05);
  }
}

/* Vignette — desktop は左→右 暗→透 のグラデで写真にフェード */
.hero-bg-vignette {
  position: absolute; inset: 0;
  background:
    /* 左はベタ暗。中央でほぼ透明。右端で画像にやや乗せる */
    linear-gradient(90deg,
      var(--bg-0) 0%,
      var(--bg-0) 38%,
      rgba(10,9,7,0.85) 46%,
      rgba(10,9,7,0.35) 58%,
      rgba(10,9,7,0.15) 75%,
      rgba(10,9,7,0.35) 100%
    ),
    /* 縦は上下を少しだけ落とす */
    linear-gradient(180deg,
      rgba(10,9,7,0.45) 0%,
      rgba(10,9,7,0.05) 25%,
      rgba(10,9,7,0.05) 75%,
      var(--bg-0) 100%
    );
}

@media (max-width: 900px) {
  .hero-bg-vignette {
    /* モバイルは縦分割：上は画像（やや暗）、下は完全な暗 */
    background:
      linear-gradient(180deg,
        rgba(10,9,7,0.35) 0%,
        rgba(10,9,7,0.15) 28%,
        rgba(10,9,7,0.55) 50%,
        var(--bg-0) 62%,
        var(--bg-0) 100%
      );
  }
}

/* Hero portrait */
.hero-portrait {
  position: absolute;
  right: -2vw;
  bottom: 0;
  top: 80px;
  width: 52%;
  z-index: 1;
  pointer-events: none;
  will-change: transform;
  animation: heroPortraitIn 1.6s 0.3s var(--ease-out) both;
}
.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 25%, #000 100%),
    linear-gradient(180deg, #000 70%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(90deg, transparent 0%, #000 25%, #000 100%),
    linear-gradient(180deg, #000 70%, transparent 100%);
  mask-composite: intersect;
  filter: brightness(0.95) contrast(1.05);
}
.hero-portrait-fade {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, var(--bg-0) 0%, rgba(10,9,7,0.4) 25%, transparent 60%),
    linear-gradient(180deg, transparent 60%, var(--bg-0) 100%);
}
@keyframes heroPortraitIn {
  from { opacity: 0; transform: translate3d(40px, 0, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@media (max-width: 900px) {
  .hero-portrait { display: none; }
}
.hero-bg-grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='2'/></filter><rect width='200' height='200' filter='url(%23n)' opacity='0.18'/></svg>");
  mix-blend-mode: overlay;
  opacity: 0.6;
}

/* Nav */
.nav {
  position: relative;
  z-index: 5;
  padding: 22px clamp(20px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}
.brand-logo {
  display: inline-flex;
  width: 44px;
  height: 44px;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.6s var(--ease), color 0.3s;
}
.brand-logo svg { width: 100%; height: 100%; }
.brand:hover .brand-logo {
  transform: rotate(8deg);
  color: var(--accent-bright, var(--accent));
}
.brand-logo ellipse {
  transform-origin: center;
  animation: brandOrbit 18s linear infinite;
}
.brand-logo ellipse:nth-of-type(2) { animation-direction: reverse; }
@keyframes brandOrbit {
  from { transform: rotate(35deg); }
  to { transform: rotate(395deg); }
}
.brand-logo ellipse:nth-of-type(2) {
  animation-name: brandOrbit2;
}
@keyframes brandOrbit2 {
  from { transform: rotate(-35deg); }
  to { transform: rotate(-395deg); }
}
.brand-text {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
}
.brand-tag-jp {
  font-family: var(--serif-jp);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 4px;
}
.brand-mark {
  font-family: var(--serif-en);
  font-size: 22px;
  letter-spacing: 0.18em;
  color: var(--ink-0);
  font-weight: 500;
}
.brand-dot { color: var(--accent); }
.brand-sub {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--ink-3);
  margin-top: 2px;
}
@media (max-width: 600px) {
  .brand-logo { width: 36px; height: 36px; }
  .brand-tag-jp { font-size: 9px; letter-spacing: 0.12em; }
  .brand-mark { font-size: 18px; }
  .brand-sub { display: none; }
}
.nav-links {
  display: flex; align-items: center; gap: 28px;
  font-family: var(--serif-en); font-style: italic;
  font-size: 14px; color: var(--ink-2);
}
.nav-links a { transition: color 0.3s; position: relative; padding: 4px 0; }
.nav-links a:not(.nav-cta):hover { color: var(--accent); }
.nav-links a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--accent);
  transition: width 0.4s var(--ease);
}
.nav-links a:not(.nav-cta):hover::after { width: 100%; }
.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--serif-jp);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.1em;
  border-radius: 2px;
  transition: background 0.3s, color 0.3s;
}
.nav-cta:hover { background: var(--accent); color: var(--bg-0); }

/* Hero content */
.hero-content {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 60px clamp(20px, 6vw, 60px);
  max-width: var(--maxw);
  margin: 0 auto;
  width: 100%;
  text-align: left;
}
/* Desktop content layout — left column ~58%, photo on right via .hero-bg */
.hero-content-main {
  max-width: 640px;
  width: 100%;
}
.hero-eyebrow { justify-content: flex-start; }
.hero-ctas { justify-content: flex-start; }

/* Hide mobile-only photo on desktop */
.hero-photo-mobile { display: none; }

/* ============================================================
   DESKTOP HERO CONCEPT BLOCK
   ============================================================ */
.hero-concept {
  margin: 0 0 36px;
  animation: fadeInUp 1.1s 0.15s var(--ease-out) both;
}
.hero-concept-q {
  font-family: var(--serif-jp);
  font-size: 16px;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin: 0 0 24px;
  display: inline-block;
}
.hero-concept-q::before {
  content: "▸ ";
  font-style: normal;
}
.hero-concept-headline {
  font-family: var(--serif-jp);
  font-weight: 500;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.45;
  letter-spacing: 0.04em;
  color: var(--ink-0);
  margin: 0 0 24px;
}
.hero-concept-headline .hcl {
  display: block;
  overflow: hidden;
}
.hero-concept-headline .hl {
  background: linear-gradient(180deg, transparent 62%, rgba(196, 154, 90, 0.32) 62%, rgba(196, 154, 90, 0.32) 94%, transparent 94%);
  padding: 0 6px;
  color: var(--ink-0);
}
.hero-concept-tag {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 18px;
  color: var(--accent);
  margin: 0 0 24px;
  letter-spacing: 0.04em;
}
.hero-concept-sub {
  font-family: var(--serif-jp);
  font-size: 15px;
  line-height: 2;
  color: var(--ink-2);
  margin: 0;
  letter-spacing: 0.04em;
  max-width: 540px;
}

/* ============================================================
   FEATURE CARDS — horizontal row at bottom of hero (desktop)
   ============================================================ */
.hero-features {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  width: 100%;
  max-width: 1080px;
  margin: 64px 0 0;
  animation: fadeInUp 1.1s 0.6s var(--ease-out) both;
}
.hero-feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 24px 22px;
  background: rgba(21, 18, 14, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 4px;
  text-decoration: none;
  color: var(--ink-1);
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease), background 0.4s var(--ease);
}
.hero-feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.35;
  transition: opacity 0.4s, height 0.4s;
}
.hero-feature-card:hover {
  border-color: var(--accent);
  background: rgba(31, 26, 20, 0.85);
  transform: translateY(-3px);
}
.hero-feature-card:hover::before {
  opacity: 1;
  height: 2px;
}
.hf-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.hf-no {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.18em;
}
.hf-icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
}
.hf-icon svg { width: 100%; height: 100%; }
.hf-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.14em;
  margin-bottom: 4px;
}
.hf-jp {
  font-family: var(--serif-jp);
  font-weight: 600;
  font-size: 18px;
  color: var(--ink-0);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.hf-title {
  font-family: var(--serif-jp);
  font-size: 14px;
  color: var(--ink-1);
  line-height: 1.6;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  text-wrap: balance;
}
.hf-desc {
  font-family: var(--serif-jp);
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.7;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}
.hf-arrow {
  width: 16px;
  height: 16px;
  color: var(--accent);
  opacity: 0.7;
  margin-top: auto;
  transition: transform 0.3s, opacity 0.3s;
}
.hero-feature-card:hover .hf-arrow {
  transform: translateX(4px);
  opacity: 1;
}
.hf-arrow svg { width: 100%; height: 100%; }

/* ============================================================
   MOBILE OVERRIDES
   ============================================================ */
@media (max-width: 900px) {
  .hero {
    background: var(--bg-0);
    min-height: 100svh;
    height: 100svh;
  }

  .hero-mobile-firstview {
    position: relative;
    display: block;
    width: 100%;
    min-height: 100%;
    overflow: hidden;
    isolation: isolate;
  }
  .hero-mobile-bg-wrap {
    position: absolute;
    inset: 0;
    z-index: -3;
  }
  .hero-mobile-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 65% center;
    filter: saturate(0.94) brightness(0.95) contrast(1.04);
  }
  .hero-mobile-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
  }
  .hero-mobile-overlay-left {
    z-index: -2;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.66) 0%, rgba(6, 14, 26, 0.5) 38%, rgba(6, 17, 31, 0.18) 74%, rgba(6, 17, 31, 0.05) 100%);
  }
  .hero-mobile-overlay-top {
    z-index: -1;
    background: linear-gradient(180deg, rgba(8, 8, 10, 0.72) 0%, rgba(8, 8, 10, 0.44) 18%, rgba(8, 8, 10, 0.08) 34%, transparent 56%);
  }
  .hero-mobile-overlay-bottom {
    z-index: -1;
    background: linear-gradient(180deg, transparent 56%, rgba(8, 10, 16, 0.2) 72%, rgba(8, 10, 16, 0.64) 88%, rgba(8, 10, 16, 0.88) 100%);
  }
  .hero-mobile-copy-panel {
    position: absolute;
    left: clamp(14px, 4.6vw, 22px);
    top: clamp(132px, 24svh, 215px);
    z-index: 2;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--serif-jp);
    font-weight: 500;
    font-size: clamp(30px, 8.4vw, 40px);
    line-height: 1.6;
    letter-spacing: 0.08em;
    color: var(--ink-0);
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.38), rgba(10, 8, 4, 0.55));
    border-left: 1px solid rgba(200, 168, 104, 0.9);
    padding: 14px 12px;
    text-shadow: 0 6px 18px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }
  .hero-mobile-copy-panel span { display: block; }

  .hero-mobile-subcopy {
    position: absolute;
    left: clamp(16px, 4.8vw, 24px);
    right: clamp(16px, 4.8vw, 24px);
    bottom: calc(126px + env(safe-area-inset-bottom, 0px));
    margin: 0;
    z-index: 2;
    max-width: min(74vw, 326px);
    font-family: var(--serif-jp);
    font-size: clamp(12px, 3.3vw, 14px);
    line-height: 1.88;
    letter-spacing: 0.05em;
    color: rgba(245, 236, 217, 0.9);
    text-shadow: 0 4px 14px rgba(0, 0, 0, 0.46);
  }
  .hero-mobile-subcopy span {
    color: var(--accent);
  }

  .hero-mobile-cta-area {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    width: min(88vw, 382px);
    z-index: 3;
    display: grid;
    gap: 8px;
  }
  .hero-mobile-cta-main {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 14px 18px;
    border-radius: 14px;
    border: 1px solid rgba(255, 240, 205, 0.16);
    background: linear-gradient(180deg, var(--accent-bright), var(--accent));
    color: #1d1608;
    font-family: var(--serif-jp);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.08em;
    box-shadow: 0 10px 30px rgba(13, 10, 6, 0.4), 0 2px 10px rgba(200, 168, 104, 0.22);
  }
  .hero-mobile-cta-note {
    margin: 0;
    text-align: center;
    font-family: var(--serif-jp);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: rgba(245, 236, 217, 0.84);
    text-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
  }

  .hero-content,
  .hero-scroll {
    display: none;
  }

  .hero-content {
    text-align: left;
    padding: 28px 20px 40px;
    gap: 0;
    justify-content: flex-start;
  }
  .hero-content-main { max-width: 100%; }
  .hero-stats { display: none; }
  .hero-scroll { display: none; }

  .hero-eyebrow {
    justify-content: center;
    margin-bottom: 18px;
  }
  .hero-eyebrow .line { width: 24px; }
  .hero-eyebrow-text { font-size: 11px; letter-spacing: 0.18em; }

  .hero-concept {
    margin: 0 0 12px;
  }
  .hero-concept-q { font-size: 14px; margin-bottom: 12px; }
  .hero-concept-headline {
    font-size: clamp(26px, 7.6vw, 34px);
    line-height: 1.45;
    margin-bottom: 14px;
  }
  .hero-concept-headline .hl {
    background: linear-gradient(180deg, transparent 60%, rgba(196, 154, 90, 0.32) 60%, rgba(196, 154, 90, 0.32) 95%, transparent 95%);
    padding: 0 4px;
  }
  .hero-concept-tag { display: none; }
  .hero-concept-sub {
    font-size: 13px;
    line-height: 1.95;
  }

  .hero-photo-mobile {
    display: block;
    position: relative;
    margin: 16px -20px 8px;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    animation: fadeInUp 1s 0.25s var(--ease-out) both;
  }
  .hero-photo-mobile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 60% 30%;
    filter: saturate(0.92) contrast(1.04);
    display: block;
  }
  .hero-photo-mobile::after {
    content: "";
    position: absolute; inset: 0;
    background:
      linear-gradient(180deg, transparent 50%, rgba(10, 9, 7, 0.55) 100%),
      linear-gradient(90deg, rgba(10, 9, 7, 0.2), transparent 30%);
    pointer-events: none;
  }
  .hero-photo-mobile-caption {
    position: absolute;
    left: 16px;
    bottom: 14px;
    z-index: 2;
  }
  .hp-eyebrow {
    font-family: var(--serif-jp);
    font-size: 12px;
    color: var(--ink-0);
    letter-spacing: 0.12em;
    background: rgba(10, 9, 7, 0.6);
    padding: 6px 12px;
    border-left: 2px solid var(--accent);
    backdrop-filter: blur(4px);
  }

  /* Feature cards — mobile (3 columns, compact) */
  .hero-features {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin: 24px 0 0;
    animation: fadeInUp 1s 0.5s var(--ease-out) both;
  }
  .hero-feature-card {
    padding: 14px 8px 12px;
    align-items: center;
    text-align: center;
    background: var(--bg-2);
    backdrop-filter: none;
  }
  .hf-top {
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
  }
  .hf-no { font-size: 10px; margin-bottom: 0; }
  .hf-icon { width: 26px; height: 26px; }
  .hf-en { font-size: 9px; letter-spacing: 0.12em; }
  .hf-jp { font-size: 12px; margin-bottom: 4px; }
  .hf-title { font-size: 10px; line-height: 1.55; margin-bottom: 4px; }
  .hf-desc { display: none; }
  .hf-arrow { width: 14px; height: 14px; margin-top: 6px; }

  /* CTAs — mobile stack */
  .hero-ctas {
    margin-top: 24px;
    flex-direction: column;
    gap: 10px;
    padding: 0;
  }
  .hero-ctas .cta, .hero-ctas .cta-ghost {
    width: 100%;
    justify-content: center;
  }

  /* Smaller phones: tighten further */
  @media (max-width: 380px) {
    .hero-features { gap: 6px; }
    .hero-feature-card { padding: 12px 6px 10px; }
    .hf-jp { font-size: 11px; }
    .hf-title { font-size: 9.5px; }
    .hero-mobile-copy-panel {
      font-size: 27px;
      top: clamp(120px, 20svh, 190px);
      padding: 12px 10px;
    }
    .hero-mobile-subcopy {
      font-size: 11.5px;
      line-height: 1.8;
      bottom: calc(120px + env(safe-area-inset-bottom, 0px));
    }
    .hero-mobile-cta-main { min-height: 50px; font-size: 14px; }
    .hero-mobile-cta-note { font-size: 10px; }
  }
}

@media (max-width: 430px) and (min-width: 390px) {
  .hero-mobile-copy-panel {
    top: clamp(136px, 24svh, 212px);
  }
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  justify-content: center; margin-bottom: 28px;
  animation: fadeInUp 1.2s var(--ease-out) both;
}
.hero-eyebrow .line {
  width: 36px; height: 1px; background: var(--accent); opacity: 0.6;
}
.hero-eyebrow-text {
  font-family: var(--serif-en); font-style: italic;
  font-size: 13px; letter-spacing: 0.2em; color: var(--accent);
}
.hero-ctas {
  display: flex; gap: 16px; justify-content: center;
  margin: 48px 0 0; flex-wrap: wrap;
  animation: fadeInUp 1.2s 0.85s var(--ease-out) both;
}

.hero-stats {
  display: flex; gap: 28px; justify-content: center; align-items: center;
  margin: 64px auto 0;
  animation: fadeInUp 1.2s 1s var(--ease-out) both;
}
.hero-stat { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.stat-num {
  font-family: var(--serif-en); font-size: 32px;
  color: var(--accent); letter-spacing: 0.05em;
}
.stat-num i { font-style: italic; font-size: 0.7em; color: var(--accent-bright); }
.stat-label { font-family: var(--serif-en); font-style: italic; font-size: 11px; color: var(--ink-3); letter-spacing: 0.1em; }
.stat-sep { width: 1px; height: 28px; background: var(--line); }

.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  font-family: var(--serif-en); font-style: italic; font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.2em;
}
.hero-scroll-line {
  width: 1px; height: 48px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes heroLineUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Section heads */
.section-head {
  text-align: center;
  margin-bottom: 64px;
}
.section-head .eyebrow { justify-content: center; }
.section-lead {
  font-size: 15px; line-height: 2; color: var(--ink-2);
  max-width: 580px; margin: 24px auto 0;
}

/* Why section */
.why-section {
  background: linear-gradient(180deg, var(--bg-0), var(--bg-1));
  position: relative;
}
.why-section::before {
  content: "";
  position: absolute; inset: 0;
  background-image: url('assets/old-books.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
  mix-blend-mode: luminosity;
}
.why-section .section-inner { position: relative; z-index: 1; }
.why-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: stretch;
  margin-top: 48px;
}
.why-card {
  position: relative;
  padding: 36px 32px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.why-card-old { opacity: 0.65; }
.why-card-new {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 20px 60px -20px rgba(200, 168, 104, 0.25);
}
.why-card-shine {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(200, 168, 104, 0.08) 50%, transparent 70%);
  pointer-events: none;
  animation: shine 4s ease-in-out infinite;
}
@keyframes shine {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}
.why-card-label {
  display: flex; align-items: center; gap: 10px; margin-bottom: 24px;
  flex-wrap: wrap;
}
.why-card-tag {
  font-family: var(--serif-en); font-style: italic; font-size: 12px;
  padding: 4px 10px; border: 1px solid var(--line);
  letter-spacing: 0.1em; color: var(--ink-3);
}
.why-card-tag.accent { border-color: var(--accent); color: var(--accent); }
.why-card-tag-jp { font-size: 12px; color: var(--ink-3); letter-spacing: 0.1em; }
.why-card-title {
  font-family: var(--serif-jp); font-size: 26px; font-weight: 500;
  margin: 0 0 16px; color: var(--ink-0); letter-spacing: 0.04em;
}
.why-card-title em { font-style: normal; color: var(--accent); }
.why-card-desc { font-size: 14px; line-height: 1.9; color: var(--ink-2); margin: 0 0 20px; }
.why-card-points {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
  border-top: 1px solid var(--line); padding-top: 20px;
}
.why-card-points li {
  font-size: 13px; color: var(--ink-2); line-height: 1.6;
  padding-left: 18px; position: relative;
}
.why-card-points li::before {
  content: ""; position: absolute; left: 0; top: 0.7em;
  width: 8px; height: 1px; background: var(--accent);
}
.why-arrow {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--accent); align-self: center;
}
.why-arrow svg { width: 80px; height: 24px; }
.why-arrow-label {
  font-family: var(--serif-en); font-style: italic;
  font-size: 14px; letter-spacing: 0.15em; color: var(--ink-3);
}

.why-quote {
  margin-top: 64px;
  text-align: center;
  position: relative;
  font-family: var(--serif-jp);
  font-size: 17px; line-height: 2;
  color: var(--ink-1);
  max-width: 720px;
  margin-left: auto; margin-right: auto;
  padding: 0 32px;
}
.why-quote .quote-mark {
  font-family: var(--serif-en); font-size: 64px;
  color: var(--accent); position: absolute;
  top: -20px; left: 0; line-height: 1;
}
.why-quote .quote-mark.right { left: auto; right: 0; bottom: -40px; top: auto; }
.why-quote p { margin: 0; }
.why-quote .dim { color: var(--ink-3); font-size: 14px; }

@media (max-width: 768px) {
  .why-compare { grid-template-columns: 1fr; }
  .why-arrow { transform: rotate(90deg); margin: 8px 0; }
  .hero-stats { gap: 16px; flex-wrap: wrap; }
  .stat-num { font-size: 26px; }
  .nav-links { gap: 14px; font-size: 12px; }
  .nav-links a:not(.nav-cta) { display: none; }
}