/* ============================================================================
   landing.css ─ 一頁式首頁專用樣式（只給 body.landing 用）
   ★ 所有顏色都引用 variables.css 內的 token，請去那裡調整顏色。
   ============================================================================ */

/* ─── 重置框架：拿掉 wrap / panel 的盒子化，讓 landing 全寬 ──── */
body.landing {
  background-image: none;
  background-color: var(--paper);
  padding-bottom: var(--buy-bar-h);
}

body.landing .wrap {
  max-width: none;
  margin: 0;
  padding: 0;
}

body.landing .panel {
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  overflow: visible;
}

/* ─── 固定米色 header（永遠呈現 scrolled 狀態） ─────────────── */
body.landing header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 14px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(251, 250, 248, 0.92);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: padding 0.4s ease;
}

body.landing header.is-scrolled {
  padding: 10px 36px;
}

body.landing .nav-overlay {
  top: 0;
}

/* ─── Video hero（最上層開頭）────────────────────────────── */
.video-hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  width: 100%;
  overflow: hidden;
  background: var(--night-soft);
}

.video-hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  will-change: transform;
}

.video-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.32) 0%, rgba(0, 0, 0, 0) 25%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0.55) 100%),
    radial-gradient(ellipse at 30% 35%, rgba(0, 0, 0, 0.15), transparent 60%);
  pointer-events: none;
}

.video-hero__copy {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 8vw;
  color: var(--paper);
  will-change: transform, opacity;
}

.video-hero__logo {
  width: 192px;
  height: 192px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-hero__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.35));
}

.video-hero__eyebrow {
  font-family: var(--serif);
  letter-spacing: 8px;
  font-size: 12px;
  text-transform: uppercase;
  opacity: 0.78;
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.video-hero__eyebrow::before,
.video-hero__eyebrow::after {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--paper-2);
  display: inline-block;
}

.video-hero__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(56px, 10vw, 144px);
  line-height: 0.95;
  letter-spacing: 2px;
  margin: 0 auto 28px;
  max-width: 16ch;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.18);
}

.video-hero__title .row {
  display: block;
}

.video-hero__title .accent {
  font-style: italic;
  color: var(--paper-2);
}

.video-hero__sub {
  font-family: var(--song);
  font-size: clamp(15px, 1.6vw, 19px);
  letter-spacing: 1.2px;
  line-height: 1.7;
  max-width: 30ch;
  margin: 0 auto;
  opacity: 0.86;
}

.video-hero__sub strong {
  font-weight: 600;
  color: var(--paper);
}

.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--paper-2);
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.scroll-cue::after {
  content: "";
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, var(--paper-2), rgba(251, 250, 248, 0));
  animation: scroll-cue-line 2.4s var(--ease-organic) infinite;
}

@keyframes scroll-cue-line {
  0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ─── Stage 圖文交替區塊 ────────────────────────────────── */
.stage {
  position: relative;
  padding: clamp(80px, 14vh, 160px) 8vw;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
  background: var(--paper);
}

.stage--reverse {
  direction: rtl;
}

.stage--reverse > * {
  direction: ltr;
}

.stage--tinted {
  background: var(--paper-warm);
}

.stage--dark {
  background: var(--night);
  color: var(--paper);
}

.stage__media {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px var(--shadow-strong);
}

/* 圖片自然比例，不裁切 */
.stage__media img {
  display: block;
  width: 100%;
  height: auto;
  will-change: transform;
  transition: transform 1.4s var(--ease-organic);
}

.stage__copy {
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-width: 480px;
}

.stage--reverse .stage__copy {
  margin-left: auto;
}

.stage__eyebrow {
  font-family: var(--serif);
  letter-spacing: 6px;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
  padding-left: 4px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.stage__eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.stage--dark .stage__eyebrow {
  color: rgba(244, 184, 158, 0.85);
}

.stage__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(32px, 4.6vw, 56px);
  line-height: 1.12;
  letter-spacing: 1.2px;
  margin: 0;
  color: var(--text);
}

.stage--dark .stage__title {
  color: var(--paper);
}

.stage__title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.stage--dark .stage__title em {
  color: var(--accent-warm);
}

.stage__body {
  font-family: var(--song);
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 2;
  color: var(--muted-strong);
  margin: 0;
}

.stage--dark .stage__body {
  color: var(--paper-strong);
}

.stage__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 6px;
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--muted-whisper);
}

.stage--dark .stage__meta {
  color: var(--paper-3);
}

.stage__meta span::before {
  content: "·";
  margin-right: 8px;
  opacity: 0.4;
}

.stage__meta span:first-child::before {
  content: "";
  margin: 0;
}

/* ─── Profile 數據列 ─────────────────────────────────────── */
.profile {
  padding: clamp(100px, 16vh, 180px) 8vw;
  text-align: center;
  background: #EFEAE2;
}

.profile__eyebrow {
  font-family: var(--serif);
  letter-spacing: 8px;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

.profile__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.18;
  letter-spacing: 1.4px;
  margin: 0 0 56px;
  color: var(--text);
}

.profile__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  max-width: 1080px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.profile__stat {
  padding: 38px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  border-right: 1px solid var(--line);
  position: relative;
}

.profile__stat:last-child {
  border-right: 0;
}

.profile__stat-label {
  font-family: var(--serif);
  letter-spacing: 3px;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
}

.profile__stat-value {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(36px, 4vw, 52px);
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.profile__stat--text .profile__stat-value {
  font-size: clamp(20px, 2.2vw, 28px);
  letter-spacing: 0.5px;
}

.profile__stat-unit {
  font-size: 0.45em;
  margin-left: 4px;
  color: var(--muted);
  font-weight: 400;
}

.profile__stat-sub {
  font-family: var(--song);
  font-size: 13px;
  color: var(--muted-faint);
  letter-spacing: 0.6px;
}

/* ─── Closing 結尾宣言 ──────────────────────────────────── */
.closing {
  padding: clamp(120px, 22vh, 220px) 8vw;
  text-align: center;
  background: var(--night);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.closing::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, var(--accent-faint), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(244, 184, 158, 0.08), transparent 50%);
  pointer-events: none;
}

.closing > * {
  position: relative;
}

.closing__mark {
  font-family: var(--serif);
  letter-spacing: 14px;
  font-size: 12px;
  opacity: 0.55;
  margin-bottom: 32px;
  text-transform: uppercase;
}

.closing__title {
  font-family: var(--serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(40px, 7vw, 96px);
  line-height: 1.1;
  letter-spacing: 1.2px;
  margin: 0 0 24px;
}

.closing__sub {
  font-family: var(--song);
  font-size: clamp(15px, 1.4vw, 18px);
  letter-spacing: 2px;
  opacity: 0.72;
  margin: 0;
}

/* ─── 一頁式深色 footer ──────────────────────────────────── */
body.landing footer {
  border-top: 0;
  margin-top: 0;
  background: var(--night);
  color: var(--paper-2);
  padding: 40px 8vw 56px;
  font-size: 12px;
  letter-spacing: 1.2px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

body.landing footer .footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

body.landing footer .text-zh {
  color: var(--paper);
  font-weight: 400;
}

body.landing footer .text-en {
  color: var(--paper-2);
}

/* ─── CTA 按鈕（每個 hero 區段的「立即購買」）───────────── */
/*  顏色變體：
    .cta          → 實心墨色，亮底用（淺 stage / tinted stage / profile）
    .cta--ghost   → 透明 + 紙色描邊，深底/影像底用（video-hero / dark stage / closing）
    .cta--lg      → 加大字距與內距，主視覺與結尾用 */
.cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 10px;
  padding: 15px 30px;
  background: var(--ink-2);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-decoration: none;
  white-space: nowrap;
  border-radius: 999px;
  border: 1px solid var(--ink);
  box-shadow: 0 14px 30px -16px rgba(0, 0, 0, 0.45);
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease,
    transform 0.4s var(--ease-organic), box-shadow 0.4s ease;
}

.cta::after {
  content: "→";
  display: inline-block;
  font-weight: 400;
  transition: transform 0.4s var(--ease-organic);
}

.cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 18px 38px -16px rgba(122, 46, 43, 0.55);
}

.cta:hover::after {
  transform: translateX(6px);
}

.cta:active {
  transform: translateY(0);
}

/* 深底 / 影像底專用：透明背景 + 紙色描邊 */
.cta--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--paper-3);
  box-shadow: none;
}

.cta--ghost:hover {
  background: var(--paper);
  color: var(--accent);
  border-color: var(--paper);
  box-shadow: 0 18px 38px -16px rgba(0, 0, 0, 0.35);
}

/* 主視覺與結尾的加大版 */
.cta--lg {
  margin-top: 36px;
  padding: 18px 38px;
  font-size: 14px;
  letter-spacing: 4px;
  gap: 18px;
}

/* 在置中區段（closing）需要的水平置中 */
.cta--center {
  align-self: center;
}

/* hero 內的 CTA 永遠跟著 .video-hero__copy 的 align-items: center 走 */
.video-hero__copy .cta {
  align-self: center;
}

@media (max-width: 600px) {
  .cta {
    padding: 13px 24px;
    font-size: 12px;
    letter-spacing: 2.5px;
    gap: 12px;
  }
  .cta--lg {
    padding: 15px 28px;
    font-size: 13px;
    letter-spacing: 3px;
    margin-top: 28px;
  }
}

/* ─── 永遠停在最下層的購買條 ────────────────────────────── */
.buy-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: var(--buy-bar-h);
  background: rgba(29, 26, 22, 0.94); /* near-solid --night */
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 56px);
  text-decoration: none;
  border-top: 1px solid var(--paper-5);
  transition: background 0.4s ease;
  transform: translateY(0);
  font-family: var(--serif);
  letter-spacing: 1px;
}

.buy-bar:hover {
  background: var(--accent);
}

.buy-bar__label {
  font-size: 13px;
  opacity: 0.86;
  letter-spacing: 1.2px;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 16px;
}

.buy-bar__cta {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  padding: 10px 22px;
  border: 1px solid var(--paper-3);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  transition: border-color 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.buy-bar:hover .buy-bar__cta {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--accent);
}

.buy-bar__cta-arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease-organic);
}

.buy-bar:hover .buy-bar__cta-arrow {
  transform: translateX(4px);
}

/* ─── landing 上的 Reveal 動畫 ───────────────────────────── */
.landing .reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s var(--ease-organic), transform 1.2s var(--ease-organic);
}

.landing .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.landing .reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease-organic), transform 0.9s var(--ease-organic);
}

.landing .reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.0s; }
.landing .reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.landing .reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.24s; }
.landing .reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.36s; }
.landing .reveal-stagger.is-visible > * {
  opacity: 1;
  transform: none;
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  body.landing header {
    padding: 12px 18px;
  }
  body.landing header.is-scrolled {
    padding: 8px 18px;
  }

  .video-hero__copy {
    padding: 0 28px;
  }

  .stage {
    grid-template-columns: 1fr;
    padding: 64px 24px;
    gap: 32px;
  }

  .stage--reverse {
    direction: ltr;
  }

  .stage__copy {
    max-width: none;
  }

  .stage--reverse .stage__copy {
    margin-left: 0;
  }

  .profile {
    padding: 72px 20px;
  }

  .profile__title {
    margin-bottom: 36px;
  }

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

  .profile__stat {
    padding: 26px 14px;
  }

  .profile__stat:nth-child(2n) {
    border-right: 0;
  }

  .profile__stat:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .closing {
    padding: 88px 28px;
  }

  body.landing footer {
    padding: 32px 24px 24px;
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
}

@media (max-width: 760px) {
  /* Landing-specific mobile nav: keep header horizontal & fixed. */
  body.landing nav > a {
    display: none;
  }
  body.landing .hamburger-btn {
    display: flex;
  }
  body.landing .nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  body.landing .nav-overlay {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 49;
    background: rgba(29, 26, 22, 0.96);
    backdrop-filter: saturate(150%) blur(12px);
    -webkit-backdrop-filter: saturate(150%) blur(12px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 32px 24px;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.35s var(--ease-organic), visibility 0.35s;
  }
  body.landing .nav-overlay.is-open {
    visibility: visible;
    opacity: 1;
  }
  body.landing .nav-overlay a {
    color: var(--paper);
    font-family: var(--serif);
    letter-spacing: 4px;
    font-size: 18px;
    padding: 14px 24px;
  }
}

@media (max-width: 600px) {
  :root {
    --buy-bar-h: 76px;
  }

  .video-hero {
    min-height: 560px;
  }

  .video-hero__title {
    font-size: clamp(40px, 13vw, 88px);
    margin-bottom: 20px;
  }

  .video-hero__eyebrow {
    font-size: 10px;
    letter-spacing: 5px;
    margin-bottom: 18px;
  }

  .scroll-cue {
    bottom: 100px;
    font-size: 10px;
  }

  .buy-bar {
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
  }

  .buy-bar__label {
    font-size: 11px;
    padding-right: 0;
    text-align: center;
  }

  .buy-bar__cta {
    font-size: 12px;
    padding: 6px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .video-hero__copy,
  .video-hero__video,
  .stage__media img {
    transform: none !important;
    transition: none !important;
  }
  .scroll-cue::after {
    animation: none;
  }
}