/* ============================================================
   湯川秀樹：粒子物理大師的人文世界—政大站
   style.css — 全站唯一共用樣式表
   由 index.html / page1–6.html / item.html / style-guide.html 共同載入
   結構：01 Design Tokens  02 Base & Reset  03 Shared Components
        04 Page-Specific Styles（各頁以 body class 範圍化，避免同名選擇器互相覆蓋）
        05 RWD / Responsive（依斷點 980px / 820px / 620px 統一管理，含 reduced-motion）
   ============================================================ */

/* ===== 01–03 Design Tokens · Base & Reset · Shared Components ===== */

/* ============================================================
   湯川秀樹：粒子物理大師的人文世界—政大站
   common.css — 全站共用 Design Token 與基礎元件
   由 index.html / page1–6.html / item.html / style-guide.html 共同載入
   ============================================================ */




/* ============================================================
   05 RWD / RESPONSIVE
   斷點系統：1920px（大螢幕・全站字體放大 1.2 倍）／
             980px（平板）／820px（小平板・卡片網格降欄）／620px（手機）
   ============================================================ */

/* 超大螢幕（>1920px 寬）：全站字體統一放大 1.2 倍。
   只覆寫 --font-scale 這個 token，所有 font-size 宣告已用
   calc(值 * var(--font-scale)) 套用，此處不需逐一調整個別選擇器。 */
@media (min-width: 1921px) {
  :root {
    --font-scale: 1.2;
  }
}



:root {
  --envelope-cream: #f1e8d5;
  --paper-ivory: #f7f2e8;
  --postmark-red: #8d302e;
  --ink-black: #272522;
  --indigo-deep: #263d53;
  --pale-blue-gray: #c6d1d6;
  --stamp-blue: #607d8b;
  --brass-gold: #ad8a52;
  --line-hair: rgba(39, 37, 34, 0.16);
  --shadow-soft: 0 10px 30px rgba(39, 37, 34, 0.12);
  --shadow-deep: 0 20px 60px rgba(39, 37, 34, 0.22);

  --font-zh-serif: "Noto Serif TC", serif;
  --font-zh-sans: "Noto Sans TC", sans-serif;
  --font-en-serif: "Cormorant Garamond", serif;
  --font-en-sans: "Inter", sans-serif;
  --font-jp: "Noto Serif JP", serif;

  /* 動畫時長：原本各頁各自定義了 420–600ms 不等的 --dur-med，
     此處統一為 Design System 文件建議值，修正跨頁動畫節奏不一致的問題 */
  --dur-fast: 220ms;
  --dur-med: 480ms;
  --dur-slow: 800ms;
  --ease-paper: cubic-bezier(0.22, 0.68, 0.32, 1);
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper-ivory);
  color: var(--ink-black);
  font-family: var(--font-zh-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

p {
  text-align: justify;
}

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

.paper-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(
      ellipse at 50% -10%,
      rgba(39, 37, 34, 0.05),
      transparent 60%
    ),
    repeating-linear-gradient(
      115deg,
      rgba(39, 37, 34, 0.015) 0px,
      rgba(39, 37, 34, 0.015) 1px,
      transparent 1px,
      transparent 3px
    );
  mix-blend-mode: multiply;
}

a {
  color: inherit;
}
button {
  font-family: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2.5px solid var(--postmark-red);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 9999;
  background: var(--ink-black);
  color: var(--paper-ivory);
  padding: 10px 16px;
  border-radius: 2px;
  font-size: 14px;
  transition: top var(--dur-fast) var(--ease-paper);
}
.skip-link:focus {
  top: 12px;
}

.utility-bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line-hair);
  font-family: var(--font-en-sans);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--indigo-deep);
}
.utility-bar .brand {
  font-family: var(--font-zh-serif);
  font-size: 14px;
  letter-spacing: 0.05em;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-en-sans);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stamp-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.back-link:hover,
.back-link:focus-visible {
  border-bottom-color: var(--stamp-blue);
}

.hero {
  margin: 0 auto;
  text-align: center;
  padding: 4rem 9rem;
}

.page-head {
  margin: 0 auto;
  text-align: left;
  padding: 4rem 9rem;
}

.layout {
  margin: 0 auto;
  text-align: left;
  padding: 4rem 9rem;
}

.closing-hero {
  margin: 0 auto;
  text-align: left;
  padding: 4rem 9rem;
}

footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-hair);
  padding: 26px 28px;
  text-align: center;
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: #7a766d;
}

/* 主選單（PAGE1–6 章節郵票列）— 出現在 page1–page6.html 的 utility-bar 之下，
   讓使用者在任一內頁都能直接切換到其他 PAGE，不必先返回首頁 */
.main-nav {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 8px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  border-bottom: 1px solid var(--line-hair);
}
.main-nav-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 2px;
  flex-shrink: 0;
  min-width: 130px;
  min-height: 44px;
  padding: 8px 14px;
  background: var(--paper-ivory);
  border: 1px solid var(--line-hair);
  text-decoration: none;
  color: var(--ink-black);
  transition:
    transform var(--dur-fast) var(--ease-paper),
    box-shadow var(--dur-fast) var(--ease-paper),
    border-color var(--dur-fast);
}
.main-nav-item:hover,
.main-nav-item:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
  border-color: var(--stamp-blue);
}
.main-nav-item .mn-no {
  font-family: var(--font-en-sans);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--stamp-blue);
}
.main-nav-item .mn-zh {
  font-family: var(--font-zh-serif);
    font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
}
.main-nav-item .mn-en {
  font-family: var(--font-en-sans);
  font-size: .8rem;
  color: #6b675f;
  line-height: 1.4;
}
.main-nav-item[aria-current="page"] {
  background: var(--envelope-cream);
  border-color: var(--postmark-red);
}
.main-nav-item[aria-current="page"] .mn-no {
  color: var(--postmark-red);
}
.main-nav-item[aria-current="page"] .mn-no::before {
  content: "● ";
}

/* ===== 04 Page-Specific Styles (scoped by body class) ===== */

/* ---- index.html (.pg-index) ---- */
.pg-index #loading {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: linear-gradient(180deg, #efe6d2 0%, #e7dac0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity var(--dur-slow) var(--ease-paper),
    visibility var(--dur-slow);
}
.pg-index #loading.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.pg-index .load-stage {
  position: relative;
  width: min(520px, 86vw);
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pg-index .load-envelope {
  position: relative;
  width: 100%;
  height: 220px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.18);
  box-shadow: var(--shadow-deep);
  transform: translateY(140px);
  opacity: 0;
  animation: envSlideIn 900ms var(--ease-paper) forwards;
}
@keyframes envSlideIn {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
.pg-index .load-envelope::before {
  /* flap */
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, #f1e8d5, #e4d6b8);
  clip-path: polygon(0 0, 100% 0, 50% 62%);
  border-bottom: 1px solid rgba(39, 37, 34, 0.12);
}
.pg-index .load-title {
  position: absolute;
  left: 22px;
  bottom: 26px;
  right: 120px;
  font-family: var(--font-zh-serif);
  font-size: clamp(14px, 2.4vw, 18px);
  letter-spacing: 0.03em;
  color: var(--ink-black);
  white-space: nowrap;
  overflow: hidden;
  border-right: 2px solid transparent;
}
.pg-index .load-title.typing {
  border-right-color: var(--ink-black);
  animation: caret 800ms steps(1) infinite;
}
@keyframes caret {
  50% {
    border-right-color: transparent;
  }
}
.pg-index .load-stamp {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 64px;
  height: 82px;
  opacity: 0;
  transform: scale(0.4) rotate(-8deg);
  transition:
    opacity var(--dur-med) var(--ease-paper),
    transform var(--dur-med) var(--ease-paper);
}
.pg-index .load-stamp.show {
  opacity: 1;
  transform: scale(1) rotate(2deg);
}
.pg-index .load-postmark {
  position: absolute;
  top: 6px;
  right: 2px;
  width: 104px;
  height: 104px;
  opacity: 0;
  transform: translateY(-40px) rotate(-18deg) scale(1.15);
  transition:
    opacity 420ms var(--ease-paper),
    transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.pg-index .load-postmark.show {
  opacity: 0.92;
  transform: translateY(0) rotate(-12deg) scale(1);
}
.pg-index .load-thread {
  position: absolute;
  left: 24px;
  bottom: 60px;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--stamp-blue), transparent);
  opacity: 0;
  transition:
    width 900ms var(--ease-paper),
    opacity 200ms;
}
.pg-index .load-thread.show {
  width: 70%;
  opacity: 0.6;
}
.pg-index .load-thread-label {
  position: absolute;
  left: 24px;
  bottom: 66px;
  font-family: var(--font-en-sans);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--stamp-blue);
  opacity: 0;
  transition: opacity 400ms ease 400ms;
}
.pg-index .load-thread-label.show {
  opacity: 1;
}

.pg-index .skip-intro {
  border: 0px;
}

.pg-index .skip-intro:hover,
.pg-index .skip-intro:focus-visible {
  background: var(--ink-black);
  color: var(--paper-ivory);
}
.pg-index .lang-toggle {
  display: flex;
  gap: 6px;
}
.pg-index .lang-toggle button {
  background: none;
  border: 1px solid var(--pale-blue-gray);
  padding: 5px 12px;
  cursor: pointer;
  color: var(--indigo-deep);
  font-size: 11px;
  transition: all var(--dur-fast);
}
.pg-index .lang-toggle button[aria-pressed="true"] {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-index .hero {
  position: relative;
  z-index: 1;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px 90px;
  overflow: hidden;
}
.pg-index .hero-bg-lines {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.35;
  pointer-events: none;
}
.pg-index .hero-bg-lines path {
  stroke: var(--stamp-blue);
  fill: none;
  stroke-width: 1;
  stroke-dasharray: 6 10;
  animation: driftLine 26s linear infinite;
}
.pg-index .hero-bg-lines path:nth-child(2) {
  stroke: var(--postmark-red);
  animation-duration: 34s;
  animation-direction: reverse;
}
.pg-index .hero-bg-lines path:nth-child(3) {
  stroke: var(--brass-gold);
  animation-duration: 40s;
}
@keyframes driftLine {
  to {
    stroke-dashoffset: -400;
  }
}
.pg-index .fdc {
  position: relative;
  width: min(1080px, 94vw);
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.16);
  box-shadow: var(--shadow-deep);
  padding: 56px 48px 64px;
  z-index: 1;
}
.pg-index .fdc::before {
  /* airmail stripes */
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: repeating-linear-gradient(
    115deg,
    var(--indigo-deep) 0 14px,
    var(--envelope-cream) 14px 22px,
    var(--postmark-red) 22px 36px,
    var(--envelope-cream) 36px 44px
  );
  opacity: 0.55;
}
.pg-index .fdc-foldline {
  position: absolute;
  left: 50%;
  top: 56px;
  bottom: 56px;
  width: 0;
  border-left: 1px dashed rgba(39, 37, 34, 0.22);
}
.pg-index .fdc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  align-items: center;
  position: relative;
}
.pg-index .fdc-left {
  display: flex;
  align-items: center;
  justify-content: center;
}
.pg-index .silhouette {
  width: 100%;
  max-width: 280px;
  opacity: 0.92;
}
.pg-index .fdc-right {
  text-align: left;
  position: relative;
}
.pg-index .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 18px;
}
.pg-index .hero-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 25px);
  line-height: 1.5;
  margin: 0 0 10px;
  color: var(--ink-black);
}
.pg-index .hero-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(18px, 1.5vw, 19px);
  line-height: 1.4;
  margin: 0 0 28px;
  color: var(--indigo-deep);
}
.pg-index .hero-tagline {
  display: flex;
  gap: 22px;
  margin: 0 0 34px;
  border-top: 1px solid var(--line-hair);
  padding-top: 20px;
}
.pg-index .hero-tagline .zh {
  font-family: var(--font-zh-sans);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-black);
  flex: 1;
}
.pg-index .hero-tagline .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.8;
  color: #4b4740;
  flex: 1;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-index .hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--ink-black);
  color: var(--paper-ivory);
  border: none;
  padding: 15px 30px;
  font-family: var(--font-zh-sans);
  font-size: 14px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-paper),
    transform var(--dur-fast);
}
.pg-index .hero-cta:hover,
.pg-index .hero-cta:focus-visible {
  background: var(--postmark-red);
  transform: translateY(-1px);
}
.pg-index .hero-cta .en {
  font-family: var(--font-en-sans);
  font-weight: 400;
  opacity: 0.8;
  font-size: 12px;
}
.pg-index .hero-stamp {
  position: absolute;
  top: -18px;
  right: -10px;
  width: 118px;
  height: 150px;
}
.pg-index .stamp-frame {
  width: 100%;
  height: 100%;
  position: relative;
  padding: 8px;
  background:
    radial-gradient(
        circle at 7px 7px,
        transparent 4.5px,
        var(--envelope-cream) 5px
      )
      repeat-x top left/14px 14px,
    radial-gradient(
        circle at 7px 7px,
        transparent 4.5px,
        var(--envelope-cream) 5px
      )
      repeat-x bottom left/14px 14px,
    radial-gradient(
        circle at 7px 7px,
        transparent 4.5px,
        var(--envelope-cream) 5px
      )
      repeat-y top left/14px 14px,
    radial-gradient(
        circle at 7px 7px,
        transparent 4.5px,
        var(--envelope-cream) 5px
      )
      repeat-y top right/14px 14px,
    var(--stamp-blue);
  box-shadow: var(--shadow-soft);
}
.pg-index .stamp-inner {
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, #7c93a0, #586f7c);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px;
}
.pg-index .stamp-inner svg {
  width: 46px;
  height: 46px;
  opacity: 0.9;
}
.pg-index .stamp-value {
  font-family: var(--font-en-sans);
  color: var(--paper-ivory);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.pg-index .hero-postmark {
  position: absolute;
  top: -40px;
  right: 66px;
  width: 120px;
  height: 120px;
  opacity: 0.85;
  mix-blend-mode: multiply;
  animation: none;
  z-index: 1;
}

.pg-index .hero-postmark circle,
.pg-index .hero-postmark line {
  stroke: var(--postmark-red);
}
.pg-index .hero-postmark text {
  fill: var(--postmark-red);
}
.pg-index .intro-strip {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 70px 24px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 48px;
}

.pg-index .intro-strip .col {
  position: relative;
}
.pg-index .intro-strip .col.zh::after {
  content: "";
  position: absolute;
  right: -24px;
  top: 0;
  bottom: 0;
  width: 0;
  border-right: 1px solid var(--line-hair);
}
.pg-index .intro-strip h2 {
  font-family: var(--font-zh-serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 14px;
}
.pg-index .intro-strip .col.en h2 {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 20px;
}
.pg-index .intro-strip p {
  font-size: 13.5px;
  line-height: 2;
  color: #3c3934;
  margin: 0;
}
.pg-index .intro-strip .col.en p {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.9;
  color: #5a564e;
}
.pg-index .menu-section {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: 20px 24px 110px;
}
.pg-index .menu-heading {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 34px;
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-blue);
  text-transform: uppercase;
}
.pg-index .menu-heading::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--line-hair);
}
.pg-index .menu-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}
.pg-index .menu-item {
  position: relative;
  background: var(--paper-ivory);
  border: none;
  cursor: pointer;
  text-align: left;
  text-decoration: none;
  padding: 16px 14px 18px;
  font-family: inherit;
  color: var(--ink-black);
  background-image:
    radial-gradient(
        circle at 6px 6px,
        transparent 3.6px,
        var(--paper-ivory) 4.1px
      )
      repeat-x top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 3.6px,
        var(--paper-ivory) 4.1px
      )
      repeat-x bottom left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 3.6px,
        var(--paper-ivory) 4.1px
      )
      repeat-y top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 3.6px,
        var(--paper-ivory) 4.1px
      )
      repeat-y top right/12px 12px;
  box-shadow:
    0 1px 0 rgba(39, 37, 34, 0.05),
    var(--shadow-soft);
  transition:
    transform var(--dur-fast) var(--ease-paper),
    box-shadow var(--dur-fast);
  min-height: 172px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.pg-index .menu-item:hover,
.pg-index .menu-item:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(39, 37, 34, 0.16);
}
.pg-index .menu-item .page-no {
  font-family: var(--font-en-sans);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--stamp-blue);
}
.pg-index .menu-item .title-zh {
  font-family: var(--font-zh-serif);
  font-size: 27px;
  font-weight: 600;
  line-height: 1.5;
  margin-top: 10px;
}
.pg-index .menu-item .title-en {
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: #6b675f;
  margin-top: 6px;
  line-height: 1.5;
}
.pg-index .menu-item .status {
  align-self: flex-end;
  font-family: var(--font-en-sans);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--pale-blue-gray);
  opacity: 0;
  transform: scale(1.4) rotate(-14deg);
  transition:
    opacity var(--dur-med),
    transform var(--dur-med) var(--ease-paper);
  border: 1px solid var(--postmark-red);
  color: var(--postmark-red);
  padding: 3px 7px;
  border-radius: 50%;
}
.pg-index .menu-item.visited {
  background-color: #efe8d8;
}
.pg-index .menu-item.visited .status {
  opacity: 0.85;
  transform: scale(1) rotate(-14deg);
}
.pg-index .menu-item.visited .page-no {
  color: var(--postmark-red);
}
.pg-index .menu-item:visited {
  background-color: #efe8d8;
}
.pg-index .menu-item:visited .status {
  opacity: 0.85;
  transform: scale(1) rotate(-14deg);
}
.pg-index .menu-item:visited .page-no {
  color: var(--postmark-red);
}

/* ---- page1.html (.pg-page1) ---- */
.pg-page1 .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 16px;
}
.pg-page1 .hero-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 32px);
  margin: 0 0 6px;
}
.pg-page1 .hero-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--indigo-deep);
  margin: 0 0 30px;
}
.pg-page1 .notice-panel {
  position: relative;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.16);
  box-shadow: var(--shadow-deep);
  padding: 44px 40px;
}
.pg-page1 .notice-panel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: repeating-linear-gradient(
    115deg,
    var(--indigo-deep) 0 14px,
    var(--envelope-cream) 14px 22px,
    var(--postmark-red) 22px 36px,
    var(--envelope-cream) 36px 44px
  );
  opacity: 0.55;
}
.pg-page1 .notice-postmark {
  position: absolute;
  top: -30px;
  right: 32px;
  width: 120px;
  height: 120px;
  opacity: 0.9;
  mix-blend-mode: multiply;
}
.pg-page1 .notice-postmark circle,
.pg-page1 .notice-postmark line {
  stroke: var(--postmark-red);
}
.pg-page1 .notice-postmark text {
  fill: var(--postmark-red);
}
.pg-page1 .field-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 40px;
  margin-top: 10px;
}
.pg-page1 .field {
  border-bottom: 1px solid var(--line-hair);
  padding-bottom: 16px;
}
.pg-page1 .field .label {
  font-family: var(--font-en-sans);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.pg-page1 .field .value-zh {
  font-family: var(--font-zh-serif);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}
.pg-page1 .field .value-en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: #5a564e;
  margin-top: 4px;
  line-height: 1.6;
}
.pg-page1 .field.wide {
  grid-column: 1/-1;
}
.pg-page1 .visual-strip {
  position: relative;
  z-index: 1;
max-width: 1350px;
    margin: 40px auto 0;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2.1fr 0.9fr;
  gap: 0 36px;
  align-items: center;
}
.pg-page1 .visual-art {
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
padding: 5px;
}
.pg-page1 .visual-art svg {
  width: 100%;
  height: auto;
  display: block;
}
.pg-page1 .visual-copy h2 {
  font-family: var(--font-zh-serif);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 12px;
}
.pg-page1 .visual-copy .en-h {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--indigo-deep);
  margin: 0 0 18px;
}
.pg-page1 .visual-copy p {
  font-size: 16px;
  line-height: 1.9;
  margin: 0 0 14px;
}
.pg-page1 .visual-copy p.en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: #5a564e;
  line-height: 1.85;
}
.pg-page1 .physical-block {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 60px auto 0;
  padding: 34px 24px;
  border-top: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
}
.pg-page1 .physical-block .zh {
  font-size: 16px;
  line-height: 1.95;
}
.pg-page1 .physical-block .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.9;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page1 .physical-block h3 {
  font-family: var(--font-zh-serif);
  font-size: 16px;
  margin: 0 0 12px;
  letter-spacing: 1px;
}
.pg-page1 .physical-block .en h3 {
  font-family: var(--font-en-sans);
  font-weight: 600;
  font-size: 13px;
}
.pg-page1 .cta-wrap {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 60px auto 100px;
  padding: 0 24px;
  text-align: center;
}
.pg-page1 .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--ink-black);
  color: var(--paper-ivory);
  border: none;
  padding: 17px 38px;
  font-family: var(--font-zh-sans);
  font-size: 15px;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  transition:
    background var(--dur-fast) var(--ease-paper),
    transform var(--dur-fast);
}
.pg-page1 .cta-btn:hover,
.pg-page1 .cta-btn:focus-visible {
  background: var(--postmark-red);
  transform: translateY(-1px);
}
.pg-page1 .cta-btn .en {
  font-family: var(--font-en-sans);
  font-weight: 400;
  opacity: 0.8;
  font-size: 12.5px;
}

/* ---- page2.html (.pg-page2) ---- */
.pg-page2 .page-eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.pg-page2 .page-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 32px);
  margin: 0 0 6px;
}
.pg-page2 .page-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--indigo-deep);
  margin: 0 0 26px;
}
.pg-page2 .page-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  border-top: 1px solid var(--line-hair);
  padding-top: 22px;
}
.pg-page2 .page-intro .zh {
  font-size: 16px;
  line-height: 1.9;
}
.pg-page2 .page-intro .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.85;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page2 .route-wrap {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: 50px 40px 10px;
}
.pg-page2 .route-track {
  position: relative;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--stamp-blue) 0 8px,
    transparent 8px 14px
  );
  margin: 0 20px;
}
.pg-page2 .route-track::before,
.pg-page2 .route-track::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}
.pg-page2 .route-track::before {
  left: -10px;
  border-right: 8px solid var(--stamp-blue);
}
.pg-page2 .route-track::after {
  right: -10px;
  border-left: 8px solid var(--stamp-blue);
}
.pg-page2 .route-nodes {
  position: relative;
  display: flex;
  justify-content: space-between;
  margin-top: -31px;
}
.pg-page2 .node {
  background: none;
  border: none;
  cursor: pointer;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 0;
  width: 11%;
}
.pg-page2 .node-postmark {
  width: 60px;
  height: 60px;
  position: relative;
}
.pg-page2 .node-postmark svg {
  width: 100%;
  height: 100%;
  transition: transform var(--dur-fast) var(--ease-paper);
}
.pg-page2 .node-postmark circle {
  stroke: var(--stamp-blue);
  fill: var(--paper-ivory);
}
.pg-page2 .node-postmark text {
  fill: var(--stamp-blue);
  font-family: "Inter";
  font-weight: 600;
}
.pg-page2 .node-year {
  font-family: var(--font-en-sans);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: #6b675f;
  line-height: 1.3;
}
.pg-page2 .node:hover .node-postmark svg,
.pg-page2 .node:focus-visible .node-postmark svg {
  transform: scale(1.12);
}
.pg-page2 .node.active .node-postmark circle {
  stroke: var(--postmark-red);
  fill: var(--postmark-red);
}
.pg-page2 .node.active .node-postmark text {
  fill: var(--paper-ivory);
}
.pg-page2 .node.active .node-year {
  color: var(--postmark-red);
  font-weight: 600;
}
.pg-page2 .detail-panel {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 44px auto 100px;
  padding: 0 24px;
}
.pg-page2 .timeline-artwork {
  position: relative;
  z-index: 1;
max-width: 1400px;
  margin: 0 auto 80px;
  padding: 0 24px;
  border-top: 1px solid var(--line-hair);
  padding-top: 32px;
}
.pg-page2 .timeline-artwork h2 {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 20px;
  margin: 0 0 4px;
}
.pg-page2 .timeline-artwork .h-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  color: var(--indigo-deep);
  margin: 0 0 20px;
}
.pg-page2 .timeline-artwork-grid {
  display: grid;
  gap: 24px;
}
.pg-page2 .timeline-artwork-grid figure {
  margin: 0;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
  padding: 14px;
}
.pg-page2 .timeline-artwork-grid img {
  width: 100%;
  display: block;
  cursor: zoom-in;
}
.pg-page2 .timeline-artwork-grid figcaption {
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: #6b675f;
  margin-top: 10px;
  text-align: center;
}
.pg-page2 .lightbox {
  position: fixed;
  inset: 0;
  background: rgba(20, 18, 15, 0.94);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--dur-med) var(--ease-paper),
    visibility var(--dur-med);
}
.pg-page2 .lightbox.open {
  opacity: 1;
  visibility: visible;
}
.pg-page2 .lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  width: auto;
  height: auto;
  object-fit: contain;
  touch-action: none;
  cursor: zoom-in;
  transition: transform var(--dur-fast) var(--ease-paper);
  transform-origin: center center;
  will-change: transform;
}
.pg-page2 .lightbox img.is-zoomed {
  cursor: grab;
}
.pg-page2 .lightbox img.is-panning {
  cursor: grabbing;
}
.pg-page2 .lightbox-hint {
  display: none;
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  margin: 0;
  padding: 8px 16px;
  background: rgba(20, 18, 15, 0.55);
  border: 1px solid rgba(247, 242, 232, 0.3);
  color: var(--paper-ivory);
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-paper);
}
.pg-page2 .lightbox.open .lightbox-hint {
  opacity: 1;
}
.pg-page2 .lightbox.is-used .lightbox-hint {
  opacity: 0;
}
.pg-page2 .lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  background: none;
  border: 1px solid rgba(247, 242, 232, 0.5);
  color: var(--paper-ivory);
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 18px;
}
@media (max-width: 700px) {
  .pg-page2 .timeline-artwork-grid {
    grid-template-columns: 1fr;
  }
}
.pg-page2 .detail-card {
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
  padding: 38px 40px;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--dur-med) var(--ease-paper),
    transform var(--dur-med) var(--ease-paper);
}
.pg-page2 .detail-card.show {
  opacity: 1;
  transform: translateY(0);
}
.pg-page2 .detail-card::before {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  background: var(--postmark-red);
  margin-bottom: 18px;
}
.pg-page2 .detail-year {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 28px;
  color: var(--indigo-deep);
  margin: 0 0 4px;
}
.pg-page2 .detail-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 19px;
  margin: 0 0 22px;
}
.pg-page2 .detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 36px;
}
.pg-page2 .detail-body .zh {
  font-size: 16px;
  line-height: 1.95;
}
.pg-page2 .detail-body .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.9;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page2 .detail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-family: var(--font-en-sans);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--postmark-red);
  text-decoration: none;
  border-bottom: 1px solid var(--postmark-red);
}
.pg-page2 .mobile-route {
  display: none;
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 40px auto 0;
  padding: 0 24px;
}
.pg-page2 .mobile-route .rail {
  position: relative;
  padding-left: 34px;
  border-left: 2px dashed var(--stamp-blue);
}
.pg-page2 .mobile-node {
  position: relative;
  margin-bottom: 30px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 0 0 0;
}
.pg-page2 .mobile-node::before {
  content: "";
  position: absolute;
  left: -42px;
  top: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--stamp-blue);
  background: var(--paper-ivory);
  transition: all var(--dur-fast) var(--ease-paper);
}
.pg-page2 .mobile-node.active::before {
  background: var(--postmark-red);
  border-color: var(--postmark-red);
}
.pg-page2 .mobile-node .my {
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: var(--stamp-blue);
  letter-spacing: 0.05em;
}
.pg-page2 .mobile-node.active .my {
  color: var(--postmark-red);
  font-weight: 600;
}
.pg-page2 .mobile-node .mt {
  font-family: var(--font-zh-serif);
  font-size: 15px;
  margin-top: 4px;
}

/* ---- page3.html (.pg-page3) ---- */
.pg-page3 .side-nav {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--paper-ivory);
  padding: 14px 0;
  margin-bottom: 20px;
}
.pg-page3 .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.pg-page3 .side-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-left: none;
  border-bottom: 1px solid var(--line-hair);
  padding-bottom: 12px;
}
.pg-page3 .side-nav li a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 12.5px;
  color: #6b675f;
  text-decoration: none;
  border: 1px solid var(--pale-blue-gray);
  border-radius: 999px;
  margin-left: 0;
  transition: all var(--dur-fast);
}
.pg-page3 .side-nav li a:hover,
.pg-page3 .side-nav li a:focus-visible,
.pg-page3 .side-nav li a.active {
  color: var(--paper-ivory);
  background: var(--postmark-red);
  border-color: var(--postmark-red);
}
.pg-page3 .main-col h1 {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 30px);
  margin: 0 0 6px;
}
.pg-page3 .main-col .subtitle-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(14px, 1.7vw, 18px);
  color: var(--indigo-deep);
  margin: 0 0 34px;
}
.pg-page3 .article-section {
  padding: 34px 0;
  border-top: 1px solid var(--line-hair);
  scroll-margin-top: 96px;
}

section#intro {
  padding: 2rem 0 3.5rem;
}

.pg-page3 .article-section:first-of-type {
  border-top: none;
  padding-top: 0;
}
.pg-page3 .article-section h2 {
  font-family: var(--font-zh-serif);
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 4px;
}
.pg-page3 .article-section .h-en {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 18px;
}
.pg-page3 .intro-portrait {
  float: right;
  width: 327px;
  margin: 0 0 16px 24px;
}
.pg-page3 .intro-portrait img {
  width: 100%;
  display: block;
  box-shadow: var(--shadow-soft);
}
.pg-page3 .intro-portrait figcaption {
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: #8a867d;
  margin-top: 6px;
}
.pg-page3 .bicol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  clear: none;
}
.pg-page3 .bicol .zh {
  font-size: 15px;
  line-height: 2;
}
.pg-page3 .bicol .en {
  font-family: var(--font-en-sans);
  font-size: 13px;
  line-height: 1.9;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page3 .origin-card {
  margin-top: 16px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
  padding: 26px 28px;
}
.pg-page3 .origin-card .partners {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.pg-page3 .origin-card .partner-tag {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--indigo-deep);
  border: 1px solid var(--pale-blue-gray);
  padding: 6px 14px;
}

.pg-page3 .origin-card .partner-tag a {
  text-decoration: none;
}

.audio-mini {
  margin-top: 28px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.audio-mini .play-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--postmark-red);
  background: none;
  color: var(--postmark-red);
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: all var(--dur-fast);
}
.audio-mini .play-btn:hover,
.audio-mini .play-btn:focus-visible {
  background: var(--postmark-red);
  color: var(--paper-ivory);
}
.audio-mini .info {
  flex: 1;
}
.audio-mini .title {
  font-family: var(--font-zh-serif);
  font-size: 13px;
  font-weight: 600;
}
.audio-mini .progress-track {
  position: relative;
  height: 3px;
  background: var(--pale-blue-gray);
  margin-top: 8px;
}
.audio-mini .progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--postmark-red);
}
.audio-mini .lang-switch {
  display: flex;
  gap: 6px;
}
.audio-mini .lang-switch button {
  border: 1px solid var(--pale-blue-gray);
  background: none;
  color: var(--indigo-deep);
  font-size: 11px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.audio-mini .lang-switch button[aria-pressed="true"] {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}

/* 逐字稿（顯示/隱藏 + 內容）：搭配 .audio-mini 使用，放在其後方，
   與 item.html 內 .pg-item .transcript-toggle/.transcript-body 視覺語彙一致，
   但因 .audio-mini 出現在 page3／page5／page6 三個不同頁面，改為不限定 .pg-page 前綴的共用樣式 */
.audio-mini-transcript-toggle {
  margin-top: 10px;
  background: none;
  border: none;
  color: var(--stamp-blue);
  font-size: 14px;
  cursor: pointer;
  padding: 0;
  font-family: var(--font-en-sans);
}
.audio-mini-transcript-toggle:hover,
.audio-mini-transcript-toggle:focus-visible {
  color: var(--postmark-red);
}
.audio-mini-transcript-body {
  margin-top: 10px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  padding: 16px 20px;
  font-size: 16px;
  line-height: 1.9;
  color: #4a463f;
  display: none;
}
.audio-mini-transcript-body.open {
  display: block;
}

/* ---- page4.html (.pg-page4) ---- */
.pg-page4 .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.pg-page4 .page-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  margin: 0 0 6px;
}
.pg-page4 .page-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(14px, 1.6vw, 18px);
  color: var(--indigo-deep);
  margin: 0 0 22px;
}
.pg-page4 .page-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  border-top: 1px solid var(--line-hair);
  padding-top: 20px;
}
.pg-page4 .page-intro .zh {
  font-size: 13px;
  line-height: 1.9;
}
.pg-page4 .page-intro .en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  line-height: 1.85;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page4 .subtabs {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 34px auto 0;
  padding: 0 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.pg-page4 .subtab {
  position: relative;
  background: var(--envelope-cream);
  border: none;
  cursor: pointer;
  padding: 14px 20px 16px;
  min-width: 210px;
  text-align: left;
  background-image:
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-x top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-x bottom left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-y top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-y top right/12px 12px;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--dur-fast) var(--ease-paper),
    box-shadow var(--dur-fast);
  opacity: 0.72;
}
.pg-page4 .subtab .no {
  font-family: var(--font-en-sans);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--stamp-blue);
}
.pg-page4 .subtab .t-zh {
  font-family: var(--font-zh-serif);
  font-size: 14px;
  font-weight: 600;
  margin-top: 6px;
  line-height: 1.5;
}
.pg-page4 .subtab .t-en {
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: #6b675f;
  margin-top: 4px;
}
.pg-page4 .subtab .count {
  position: absolute;
  top: 49px;
  right: 10px;
  font-family: var(--font-en-sans);
  font-size: 10px;
  color: var(--postmark-red);
}
.pg-page4 .subtab[aria-selected="true"] {
  opacity: 1;
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(39, 37, 34, 0.16);
}
.pg-page4 .subtab[aria-selected="true"] .no {
  color: var(--postmark-red);
}
.pg-page4 .item-grid {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 36px 28px 100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pg-page4 .item-card {
  background: var(--paper-ivory);
  border: none;
  text-align: left;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--dur-fast) var(--ease-paper),
    box-shadow var(--dur-fast);
}
.pg-page4 .item-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(39, 37, 34, 0.15);
}
.pg-page4 .item-thumb {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
  background: var(--envelope-cream);
  padding: 10px;
}

.item-body {
  padding: 10px 25px;
}

.pg-page4 .item-thumb svg {
  width: 100%;
  height: 100%;
  display: block;
}
.pg-page4 .item-thumb img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
/* 展件9・內藤湖南〈迥合天機〉縮圖（class="sp1"）：原始照片為直幅書法卷軸，
   與縮圖框 4:5 的比例不同，用 object-fit:cover 會裁掉大半留白造成偏移；
   改用 object-fit:contain 讓完整卷軸置中顯示，不再裁切。 */
.pg-page4 .item-thumb img.sp1 {
  object-fit: contain;
  object-position: center center;
}
.pg-page4 .item-postmark-tag {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(247, 242, 232, 0.92);
  font-family: var(--font-en-sans);
font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--postmark-red);
    border: 1px solid var(--postmark-red);
    border-radius: 50%;
    width: 40px;
    height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.1;
}
.pg-page4 .item- .item-no {
  font-family: var(--font-en-sans);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--stamp-blue);
}
.pg-page4 .item-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 13.5px;
  line-height: 1.5;
}
.pg-page4 .item-title-en {
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: #6b675f;
  line-height: 1.5;
}
.pg-page4 .item-creator {
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: #8a867d;
  margin-top: 2px;
}
.pg-page4 .item-audio {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.pg-page4 .item-audio span {
  font-family: var(--font-en-sans);
  font-size: 8.5px;
  letter-spacing: 0.05em;
  color: var(--indigo-deep);
  border: 1px solid var(--pale-blue-gray);
  padding: 2px 7px;
}
.pg-page4 .empty-panel {
  grid-column: 1/-1;
  text-align: center;
  padding: 80px 20px;
  font-family: var(--font-en-sans);
  font-size: 13px;
  color: #8a867d;
  border: 1px dashed var(--pale-blue-gray);
}
.pg-page4 .empty-panel strong {
  display: block;
  font-family: var(--font-zh-serif);
  font-size: 16px;
  color: var(--ink-black);
  margin-bottom: 10px;
  font-weight: 600;
}

/* ---- page5.html (.pg-page5) ---- */
.pg-page5 .page-eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.pg-page5 .page-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  margin: 0 0 6px;
}
.pg-page5 .page-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(14px, 1.6vw, 18px);
  color: var(--indigo-deep);
  margin: 0 0 22px;
}
.pg-page5 .page-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  border-top: 1px solid var(--line-hair);
  padding-top: 20px;
  margin-bottom: 8px;
}
.pg-page5 .page-intro .zh {
  font-size: 16px;
  line-height: 1.9;
}
.pg-page5 .page-intro .en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  line-height: 1.85;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page5 .subtabs {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 34px auto 0;
  padding: 0 28px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.pg-page5 .subtab {
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  cursor: pointer;
  padding: 11px 18px;
  font-family: var(--font-zh-sans);
  font-size: 14px;
  color: var(--ink-black);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: all var(--dur-fast) var(--ease-paper);
  border-bottom: 3px solid transparent;
}
.pg-page5 .subtab .en {
  font-family: var(--font-en-sans);
  font-size: 9.5px;
  color: #6b675f;
  letter-spacing: 0.04em;
}
.pg-page5 .subtab[aria-selected="true"] {
  border-bottom-color: var(--postmark-red);
  background: var(--paper-ivory);
}
.pg-page5 .subtab[aria-selected="true"] .en {
  color: var(--postmark-red);
}
.pg-page5 .filter-bar {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 26px auto 0;
  padding: 20px 28px;
  background: var(--envelope-cream);
  border-top: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: flex-start;
}
.pg-page5 .filter-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.pg-page5 .filter-group .label {
  font-family: var(--font-en-sans);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--stamp-blue);
  text-transform: uppercase;
}
.pg-page5 .filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.pg-page5 .pill {
  border: 1px solid var(--pale-blue-gray);
  background: var(--paper-ivory);
  color: var(--indigo-deep);
  font-size: 12px;
  padding: 6px 13px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.pg-page5 .pill[aria-pressed="true"] {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-page5 .search-group {
  margin-left: auto;
  min-width: 220px;
  flex: 1;
  max-width: 280px;
}
.pg-page5 .search-group input {
  width: 100%;
  padding: 6px 7px;
  border: 1px solid var(--pale-blue-gray);
  background: var(--paper-ivory);
  font-family: var(--font-zh-sans);
  font-size: 16px;
  color: var(--ink-black);
}
.pg-page5 .search-group input::placeholder {
  color: #9a968c;
}
.pg-page5 .clear-filters {
  align-self: flex-end;
  background: none;
  border: none;
  text-decoration: underline;
  cursor: pointer;
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: var(--postmark-red);
}
.pg-page5 .result-count {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 18px auto 0;
  padding: 0 28px;
  font-family: var(--font-en-sans);
  font-size: 11.5px;
  color: #6b675f;
}
.pg-page5 .card-grid {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 28px 100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.pg-page5 .card {
  background: var(--paper-ivory);
  border: 1px solid var(--line-hair);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  transition:
    transform var(--dur-fast) var(--ease-paper),
    box-shadow var(--dur-fast);
  padding: 10px;
}

.card-body {
  padding: 10px 25px;
}

.pg-page5 .card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(39, 37, 34, 0.15);
}
.pg-page5 .card.hidden {
  display: none;
}
.pg-page5 .cover-stamp {
  margin: 16px 16px 0;
  aspect-ratio: 3/4;
  position: relative;
  background:
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-x top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-x bottom left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-y top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-y top right/12px 12px;
  padding: 9px;
}
.pg-page5 .cover-stamp svg {
  width: 100%;
  height: 100%;
  display: block;
}
.pg-page5 .cover-stamp img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.pg-page5 .card-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  margin: 0;
}
.pg-page5 .card-title-en {
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: #6b675f;
  margin: 0;
  line-height: 1.5;
}
.pg-page5 .card-meta {
  font-family: var(--font-en-sans);
  font-size: 14px;
  color: #8a867d;
  line-height: 1.8;
  margin-top: 6px;
}
.pg-page5 .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}
.pg-page5 .card-tags span {
  font-family: var(--font-en-sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--stamp-blue);
  border: 1px solid var(--pale-blue-gray);
  padding: 2px 8px;
}
.pg-page5 .view-record {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: var(--postmark-red);
  text-decoration: none;
  border-bottom: 1px solid var(--postmark-red);
}
.pg-page5 .view-record svg {
  width: 11px;
  height: 11px;
}
.pg-page5 .empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 70px 20px;
  color: #8a867d;
  font-family: var(--font-en-sans);
  font-size: 13px;
  display: none;
}
.pg-page5 .empty-state.show {
  display: block;
}

/* ---- page6.html (.pg-page6) ---- */
.pg-page6 .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 18px;
}
.pg-page6 .closing-title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.6vw, 34px);
  margin: 0 0 8px;
  line-height: 1.5;
}
.pg-page6 .closing-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(15px, 1.9vw, 20px);
  color: var(--indigo-deep);
  margin: 0 0 40px;
}
.pg-page6 .seal {
  width: 96px;
  height: 96px;
  margin: 0 auto 30px;
  opacity: 0.85;
}
.pg-page6 .seal circle,
.pg-page6 .seal line {
  stroke: var(--postmark-red);
}
.pg-page6 .seal text {
  fill: var(--postmark-red);
}
.pg-page6 .statements {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}
.pg-page6 .statement {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  padding: 34px 0;
  border-top: 1px solid var(--line-hair);
}
.pg-page6 .statement:first-child {
  border-top: none;
}
.pg-page6 .statement .zh {
  font-size: 14px;
  line-height: 2;
}
.pg-page6 .statement .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.9;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page6 .reunion-card {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 50px auto 0;
  padding: 32px 30px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
}
.pg-page6 .reunion-card h2 {
  font-family: var(--font-zh-serif);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
}
.pg-page6 .reunion-card .h-en {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 16px;
}
.pg-page6 .reunion-card .bicol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
}
.pg-page6 .reunion-card .zh {
  font-size: 13px;
  line-height: 1.95;
}
.pg-page6 .reunion-card .en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  line-height: 1.85;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-page6 .route-mark {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  align-items: center;
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--indigo-deep);
}
.pg-page6 .route-mark .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--postmark-red);
}
.pg-page6 .route-mark .seg {
  flex: 1;
  border-top: 1px dashed var(--pale-blue-gray);
}
.pg-page6 .credits {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 60px auto 0;
  padding: 34px 24px 0;
  border-top: 1px solid var(--line-hair);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px 24px;
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: #5a564e;
  line-height: 1.9;
}
.pg-page6 .credits h3 {
  font-family: var(--font-zh-serif);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-black);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}
.pg-page6 .copyright-line {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 36px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid var(--line-hair);
  text-align: center;
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: #8a867d;
  line-height: 1.9;
}
.pg-page6 .re-entry {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 50px auto 100px;
  padding: 0 24px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.pg-page6 .re-entry a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  padding: 15px 30px;
  font-family: var(--font-zh-sans);
  font-size: 14px;
  letter-spacing: 0.03em;
  transition: all var(--dur-fast) var(--ease-paper);
}
.pg-page6 .re-entry a.primary {
  background: var(--ink-black);
  color: var(--paper-ivory);
  border: none;
}
.pg-page6 .re-entry a.primary:hover,
.pg-page6 .re-entry a.primary:focus-visible {
  background: var(--postmark-red);
}
.pg-page6 .re-entry a.secondary {
  background: none;
  color: var(--ink-black);
  border: 1px solid var(--ink-black);
}
.pg-page6 .re-entry a.secondary:hover,
.pg-page6 .re-entry a.secondary:focus-visible {
  background: var(--ink-black);
  color: var(--paper-ivory);
}
.pg-page6 .re-entry .en {
  font-family: var(--font-en-sans);
  font-weight: 400;
  opacity: 0.8;
  font-size: 12px;
}

/* ---- item.html (.pg-item) ---- */
.pg-item .breadcrumb a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  font-weight: 500;
}
.pg-item .breadcrumb a:hover,
.pg-item .breadcrumb a:focus-visible {
  border-bottom-color: #8a867d;
}
.pg-item .breadcrumb span.current {
  color: var(--postmark-red);
  font-weight: 800;
}
.pg-item .prev-next {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 14px auto 0;
  padding: 0 28px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-en-sans);
  font-size: 11.5px;
}
.pg-item .prev-next a {
  text-decoration: none;
  color: var(--indigo-deep);
  border-bottom: 1px solid transparent;
}
.pg-item .prev-next a:hover,
.pg-item .prev-next a:focus-visible {
  border-bottom-color: var(--indigo-deep);
}
.pg-item .prev-next a.disabled {
  pointer-events: none;
  opacity: 0.35;
}
.pg-item .artifact-wrap {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 0 0;
  padding: 16px 28px 100px;
}
.pg-item .image-col {
  position: relative;
}
.pg-item .image-frame {
  position: relative;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-deep);
  padding: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}
.pg-item .image-frame svg.art {
  width: 100%;
  height: auto;
  display: block;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.pg-item .image-frame img.art {
  width: 100%;
  max-height: 70vh;
  height: auto;
  object-fit: contain;
  display: block;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.pg-item .image-thumbs {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.pg-item .image-thumbs img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  cursor: pointer;
  border: 1px solid rgba(39, 37, 34, 0.14);
}
.pg-item .lightbox img.art {
  max-width: 92vw;
  max-height: 92vh;
  width: auto;
  height: auto;
  object-fit: contain;
  touch-action: none;
  cursor: zoom-in;
  transition: transform var(--dur-fast) var(--ease-paper);
  transform-origin: center center;
  will-change: transform;
}
.pg-item .lightbox img.art.is-zoomed {
  cursor: grab;
}
.pg-item .lightbox img.art.is-panning {
  cursor: grabbing;
}
.pg-item .lightbox-hint {
  display: none;
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  margin: 0;
  padding: 8px 16px;
  background: rgba(20, 18, 15, 0.55);
  border: 1px solid rgba(247, 242, 232, 0.3);
  color: var(--paper-ivory);
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-paper);
}
.pg-item .lightbox.open .lightbox-hint {
  opacity: 1;
}
.pg-item .lightbox.is-used .lightbox-hint {
  opacity: 0;
}
.pg-item .stamp-corner-badge {
  position: absolute;
  width: 64px;
  height: 80px;
  background:
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-x top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-x bottom left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-y top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--envelope-cream) 4.5px
      )
      repeat-y top right/12px 12px,
    var(--stamp-blue);
  color: var(--paper-ivory);
  font-family: var(--font-en-sans);
  font-size: 9px;
  letter-spacing: 0.08em;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  text-align: center;
  box-shadow: var(--shadow-soft);
}
.pg-item .stamp-corner-badge.exhibit-no {
    top: -12px;
    left: -19px;
}
.pg-item .stamp-corner-badge.year {
    top: -36px;
    right: 10px;
  background-color: var(--postmark-red);
}
.pg-item .stamp-corner-badge b {
  font-size: 13px;
}
.pg-item .image-tools {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.pg-item .tool-btn {
  background: none;
  border: 1px solid var(--pale-blue-gray);
  color: var(--indigo-deep);
  padding: 9px 16px;
  font-size: 12px;
  letter-spacing: 0.03em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--dur-fast);
}
.pg-item .tool-btn:hover,
.pg-item .tool-btn:focus-visible {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-item .lightbox {
  position: fixed;
  inset: 0;
  background: rgba(20, 18, 15, 0.94);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--dur-med) var(--ease-paper),
    visibility var(--dur-med);
}
.pg-item .lightbox.open {
  opacity: 1;
  visibility: visible;
}
.pg-item .lightbox svg {
  max-width: 88vw;
  max-height: 86vh;
}
.pg-item .lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  background: none;
  border: 1px solid rgba(247, 242, 232, 0.5);
  color: var(--paper-ivory);
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 18px;
}
.pg-item .info-col {
  padding: 0 0 0 40px;
}
.pg-item .info-eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 6px 0 16px;
}
.pg-item .title-block {
  display: block;
  border-bottom: 1px solid var(--line-hair);
  padding-bottom: 22px;
  margin-bottom: 22px;
}
.pg-item .title-zh {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 24px;
  margin: 0 0 6px;
}
.pg-item .title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 16px;
  color: var(--indigo-deep);
  margin: 0;
}
.pg-item .meta-line {
  font-family: var(--font-en-sans);
  font-size: 11.5px;
  color: #6b675f;
  margin-top: 14px;
  line-height: 1.8;
}
.pg-item .anchor-nav {
  display: flex;
  gap: 4px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.pg-item .anchor-nav a {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--indigo-deep);
  text-decoration: none;
  padding: 7px 14px;
  border: 1px solid var(--pale-blue-gray);
}
.pg-item .anchor-nav a:hover,
.pg-item .anchor-nav a:focus-visible {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-item .text-section {
  border-top: 1px solid var(--line-hair);
  padding: 22px 0;
}
.pg-item .text-section summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 15px;
}
.pg-item .text-section summary::-webkit-details-marker {
  display: none;
}
.pg-item .text-section summary .en-label {
  font-family: var(--font-en-sans);
  font-weight: 400;
  font-size: 11px;
  color: var(--stamp-blue);
  letter-spacing: 0.08em;
  margin-left: 10px;
}
.pg-item .text-section summary::after {
  content: "+";
  font-size: 18px;
  color: var(--stamp-blue);
}
.pg-item .text-section[open] summary::after {
  content: "–";
}
.pg-item .text- .text-body .zh {
  font-size: 13.5px;
  line-height: 2;
}
.pg-item .text-body .original {
  font-family: var(--font-jp);
  font-size: 14px;
  line-height: 2.1;
  min-height: 80px;
  color: #4a463f;
}

nav#breadcrumb {
  margin: 0 auto;
  text-align: center;
  padding: 2rem;
}

.pg-item .text-body .en {
  font-family: var(--font-en-sans);
  font-size: 12.5px;
  line-height: 1.9;
  color: #5a564e;
  border-left: 1px solid var(--line-hair);
  padding-left: 22px;
}
.pg-item .text-body.single {
  grid-template-columns: 1fr 1fr;
}
.pg-item .audio-player {
  margin-top: 30px;
  background: var(--envelope-cream);
  border: 1px solid rgba(39, 37, 34, 0.14);
  box-shadow: var(--shadow-soft);
  padding: 22px 24px;
}
.pg-item .audio-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.pg-item .audio-title {
  font-family: var(--font-zh-serif);
  font-size: 14px;
  font-weight: 600;
}
.pg-item .audio-lang-switch {
  display: flex;
  gap: 6px;
}
.pg-item .audio-lang-switch button {
  border: 1px solid var(--pale-blue-gray);
  background: none;
  color: var(--indigo-deep);
  font-size: 11px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.pg-item .audio-lang-switch button[aria-pressed="true"] {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-item .audio-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}
.pg-item .play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--postmark-red);
  background: none;
  color: var(--postmark-red);
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: all var(--dur-fast);
}
.pg-item .play-btn:hover,
.pg-item .play-btn:focus-visible {
  background: var(--postmark-red);
  color: var(--paper-ivory);
}
.pg-item .progress-wrap {
  flex: 1;
}
.pg-item .progress-track {
  position: relative;
  height: 3px;
  background: var(--pale-blue-gray);
  cursor: pointer;
}
.pg-item .progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--postmark-red);
}
.pg-item .progress-track input[type="range"] {
  position: absolute;
  inset: -8px 0;
  width: 100%;
  height: 20px;
  opacity: 0;
  cursor: pointer;
  margin: 0;
}
.pg-item .time-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: #6b675f;
  margin-top: 6px;
}
.pg-item .audio-extra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  flex-wrap: wrap;
  gap: 10px;
}
.pg-item .speed-group {
  display: flex;
  gap: 6px;
}
.pg-item .speed-group button {
  border: 1px solid var(--pale-blue-gray);
  background: none;
  color: var(--indigo-deep);
  font-size: 10.5px;
  padding: 5px 9px;
  cursor: pointer;
  font-family: var(--font-en-sans);
}
.pg-item .speed-group button[aria-pressed="true"] {
  background: var(--stamp-blue);
  color: var(--paper-ivory);
  border-color: var(--stamp-blue);
}
.pg-item .volume-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.pg-item .volume-row input[type="range"] {
  width: 80px;
  accent-color: var(--stamp-blue);
}
.pg-item .transcript-toggle {
  margin-top: 14px;
  background: none;
  border: none;
  color: var(--stamp-blue);
  font-size: 11.5px;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  font-family: var(--font-en-sans);
}
.pg-item .transcript-body {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.9;
  color: #4a463f;
  white-space: pre-line;
  display: none;
  border-top: 1px dashed var(--line-hair);
  padding-top: 12px;
}
.pg-item .transcript-body.open {
  display: block;
}

/* ---- style-guide.html (.pg-styleguide) ---- */
.pg-styleguide .sg-hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 28px 30px;
}
.pg-styleguide .sg-hero .eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.pg-styleguide .sg-hero h1 {
  font-family: var(--font-zh-serif);
  font-size: clamp(24px, 3.2vw, 32px);
  margin: 0 0 6px;
}
.pg-styleguide .sg-hero p.en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 16px;
  color: var(--indigo-deep);
  margin: 0 0 10px;
}
.pg-styleguide .sg-hero p.desc {
  font-size: 13px;
  color: #5a564e;
  line-height: 1.8;
  max-width: 640px;
}
.pg-styleguide .toc {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pg-styleguide .toc a {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--indigo-deep);
  text-decoration: none;
  border: 1px solid var(--pale-blue-gray);
  padding: 7px 14px;
}
.pg-styleguide .toc a:hover {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-styleguide section.sg {
  max-width: 1100px;
  margin: 0 auto;
  padding: 50px 28px;
  border-top: 1px solid var(--line-hair);
  scroll-margin-top: 20px;
}
.pg-styleguide section.sg h2 {
  font-family: var(--font-zh-serif);
  font-size: 19px;
  margin: 0 0 4px;
}
.pg-styleguide section.sg .h-en {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stamp-blue);
  text-transform: uppercase;
  margin: 0 0 26px;
}
.pg-styleguide .swatch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.pg-styleguide .swatch {
  border: 1px solid var(--line-hair);
}
.pg-styleguide .swatch .chip {
  height: 80px;
}
.pg-styleguide .swatch .label {
  padding: 10px 12px;
  font-family: var(--font-en-sans);
  font-size: 11px;
  background: var(--paper-ivory);
}
.pg-styleguide .swatch .label b {
  display: block;
  font-family: var(--font-zh-sans);
  font-size: 12px;
  margin-bottom: 2px;
}
.pg-styleguide .type-row {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-hair);
}
.pg-styleguide .type-row .tag {
  width: 180px;
  flex-shrink: 0;
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: var(--stamp-blue);
  letter-spacing: 0.06em;
}
.pg-styleguide .type-row .sample.zh-serif {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 22px;
}
.pg-styleguide .type-row .sample.en-serif {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--indigo-deep);
}
.pg-styleguide .type-row .sample.zh-sans {
  font-family: var(--font-zh-sans);
  font-size: 14px;
}
.pg-styleguide .type-row .sample.en-sans {
  font-family: var(--font-en-sans);
  font-size: 13px;
}
.pg-styleguide .type-row .sample.jp {
  font-family: var(--font-jp);
  font-size: 14px;
}
.pg-styleguide .spacing-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.pg-styleguide .spacing-row .bar {
  background: var(--stamp-blue);
  height: 14px;
}
.pg-styleguide .spacing-row .val {
  font-family: var(--font-en-sans);
  font-size: 11px;
  color: #5a564e;
  width: 50px;
}
.pg-styleguide .demo-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}
.pg-styleguide .btn-primary {
  background: var(--ink-black);
  color: var(--paper-ivory);
  border: none;
  padding: 15px 30px;
  font-family: var(--font-zh-sans);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-paper);
}
.pg-styleguide .btn-primary:hover {
  background: var(--postmark-red);
  transform: translateY(-1px);
}
.pg-styleguide .btn-secondary {
  background: none;
  border: 1px solid var(--ink-black);
  color: var(--ink-black);
  padding: 14px 28px;
  font-family: var(--font-zh-sans);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.pg-styleguide .btn-secondary:hover {
  background: var(--ink-black);
  color: var(--paper-ivory);
}
.pg-styleguide .pill-demo {
  border: 1px solid var(--pale-blue-gray);
  background: var(--paper-ivory);
  color: var(--indigo-deep);
  font-size: 12px;
  padding: 6px 13px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.pg-styleguide .pill-demo[aria-pressed="true"] {
  background: var(--indigo-deep);
  color: var(--paper-ivory);
  border-color: var(--indigo-deep);
}
.pg-styleguide .stamp-demo {
  width: 110px;
  height: 140px;
  padding: 8px;
  background:
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-x top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-x bottom left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-y top left/12px 12px,
    radial-gradient(
        circle at 6px 6px,
        transparent 4px,
        var(--paper-ivory) 4.5px
      )
      repeat-y top right/12px 12px,
    var(--stamp-blue);
  box-shadow: var(--shadow-soft);
}
.pg-styleguide .stamp-demo .inner {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--paper-ivory);
  font-family: var(--font-en-sans);
  font-size: 10px;
}
.pg-styleguide .postmark-demo svg {
  width: 120px;
  height: 120px;
}
.pg-styleguide .postmark-demo circle,
.pg-styleguide .postmark-demo line {
  stroke: var(--postmark-red);
}
.pg-styleguide .postmark-demo text {
  fill: var(--postmark-red);
}
.pg-styleguide .card-demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.pg-styleguide .card-demo {
  background: var(--paper-ivory);
  border: 1px solid var(--line-hair);
  box-shadow: var(--shadow-soft);
  padding: 16px;
  transition: all var(--dur-fast) var(--ease-paper);
}
.pg-styleguide .card-demo:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(39, 37, 34, 0.15);
}
.pg-styleguide .card-demo .no {
  font-family: var(--font-en-sans);
  font-size: 10px;
  color: var(--stamp-blue);
}
.pg-styleguide .card-demo .t {
  font-family: var(--font-zh-serif);
  font-weight: 600;
  font-size: 14px;
  margin-top: 8px;
}
.pg-styleguide .card-demo .te {
  font-family: var(--font-en-sans);
  font-size: 10.5px;
  color: #6b675f;
  margin-top: 4px;
}
.pg-styleguide pre {
  background: var(--ink-black);
  color: #f1e8d5;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.7;
}
.pg-styleguide code {
  font-family: "SFMono-Regular", Consolas, monospace;
}
.pg-styleguide .a11y-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.pg-styleguide .a11y-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13px;
  line-height: 1.7;
}
.pg-styleguide .a11y-list li .mark {
  color: var(--postmark-red);
  font-weight: 600;
}

/* Page 04 子分類介紹區塊排版（獨立於 style.css / RWD.css，避免相依外部樣式） */

/* ---- 基礎版面（結構、間距、最大寬度）---- */
.subsection-intro {
  display: none; /* 是否顯示：只交給 .is-active 控制 */
  margin: 32px auto;
  padding: 1rem;
  max-width: 1200px;
}

/* ---- 顯示/隱藏開關：只負責 display，不夾帶其他樣式 ---- */
.subsection-intro.is-active {
  display: block;
}

/* clearfix：figure 用 float 後不會撐開父層高度，需手動清除，
     否則下方 .item-grid 會往上跑、蓋住圖片下半部 */
.subsection-intro.is-active::after {
  content: "";
  display: table;
  clear: both;
}

/* ---- 圖片欄（float 版，方便依實際圖片比例微調寬高）---- */
.subsection-intro figure {
  float: left;
  width: 70%;
  max-width: 490px;
  min-width: 160px;
  margin: 0 16px 16px 0;
}
.subsection-intro figure img {
  display: block;
  width: 100%; /* 永遠貼合 figure 容器寬度，不寫死 px */
  height: auto;
  aspect-ratio: 1 / 1; /* 家族樹圖實際尺寸為 750×750（正方形），需與實際圖片比例一致；換圖時請對應調整 */
  object-fit: contain; /* 用 contain 而非 cover：比例不合時「留白」而非「裁切」，確保圖表內容永遠完整可見 */
  background: #f7f2e8; /* contain 若有留白時，用底色填滿而非透明 */
  border: 1px solid #ccc;
}
.subsection-intro figure figcaption {
  font-size: 0.85em;
  margin-top: 6px;
  color: #666;
  text-align: center;
}

/* ---- 家族樹下方：人物快速導覽錨點按鈕 ---- */
.figure-anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 0px;
  background: #f7f2e8;
  border-radius: 8px;
}
.figure-anchor-btn {
  display: inline-block;
  padding: 0.8rem;
  font-size: 0.88em;
  line-height: 1.4;
  color: #5a3e1b;
  background: #fffdf8;
  border: 1px solid #c9a86a;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease,
    transform 0.12s ease,
    box-shadow 0.18s ease;
  writing-mode: vertical-lr;
}
.figure-anchor-btn:hover,
.figure-anchor-btn:focus-visible {
  background: #8a5a2b;
  color: #fff;
  border-color: #8a5a2b;
  box-shadow: 0 3px 8px rgba(138, 90, 43, 0.28);
  transform: translateY(-1px);
}
.figure-anchor-btn:active {
  transform: translateY(0);
  box-shadow: none;
}
.figure-anchor-btn:focus-visible {
  outline: 2px solid #8a5a2b;
  outline-offset: 2px;
}

/* ---- 文字欄 ----
     不手動設定寬度百分比：overflow:hidden 建立新的 BFC（Block Formatting Context），
     讓文字欄自動避開左側浮動的圖片、寬度自動佔滿剩餘空間 */
.subsection-intro > .intro-text {
  overflow: hidden;
  text-align: left;
}

@media (max-width: 1024px) {
  .subsection-intro {
    max-width: 964px;
  }
}

/* ---- RWD 斷點一：992px（平板橫向／小筆電）
     圖片欄縮小、間距收緊，但仍維持左右並排，不整個堆疊 ---- */
@media (max-width: 992px) {
  .subsection-intro figure {
    max-width: 505px;
    width: 100%;
  }
}

/* ============================================================
   05 RWD / RESPONSIVE
   斷點系統：980px（平板）／820px（小平板・卡片網格降欄）／620px（手機）
   ============================================================ */

@media (max-width: 980px) {
  .pg-index .menu-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pg-index .fdc-grid {
    grid-template-columns: 1fr;
  }
  .pg-index .fdc-foldline {
    display: none;
  }
  .pg-index .fdc-left {
    margin-bottom: 20px;
  }
  .pg-index .hero-stamp {
    position: static;
    margin-bottom: 16px;
  }
  .pg-index .hero-postmark {
    top: 0;
    left: 0;
  }
  .pg-index .intro-strip {
    grid-template-columns: 1fr;
    gap: 34px 0;
  }
  .pg-index .intro-strip .col.zh::after {
    display: none;
  }
  .pg-page4 .item-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pg-page5 .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pg-item .artifact-wrap {
    grid-template-columns: 1fr;
  }
  .pg-item .info-col {
    padding: 36px 0 0;
  }
  .pg-item .title-block,
  .pg-item .text-body {
    grid-template-columns: 1fr;
    gap: 16px 0;
  }
  .pg-item .text-body .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 12px;
  }
  .pg-item .text-body .original {
    writing-mode: horizontal-tb;
    height: auto;
  }
  .pg-item .lightbox-hint {
    display: block;
  }
  .pg-page2 .lightbox-hint {
    display: block;
  }
}

@media (max-width: 820px) {
  .pg-page1 .visual-strip {
    grid-template-columns: 1fr;
    gap: 24px 0;
  }
  .pg-page1 .physical-block {
    grid-template-columns: 1fr;
    gap: 20px 0;
  }
  .pg-page1 .physical-block .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 14px;
  }
  .pg-page2 .route-wrap {
    display: none;
  }
  .pg-page2 .mobile-route {
    display: block !important;
  }
  .pg-page3 .layout {
    grid-template-columns: 1fr;
  }
  .pg-page3 .side-nav {
    position: static;
    margin-bottom: 20px;
  }
  .pg-page3 .intro-portrait {
    float: none;
    width: 100%;
    margin: 0 0 16px;
  }
  .pg-page3 .bicol {
    grid-template-columns: 1fr;
    gap: 14px 0;
  }
  .pg-page3 .bicol .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 14px;
  }
  .audio-mini {
    flex-wrap: wrap;
  }
  .pg-page4 .item-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pg-page4 .page-intro {
    grid-template-columns: 1fr;
    gap: 16px 0;
  }
  .pg-page4 .page-intro .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 14px;
  }
  .pg-page4 .subtab {
    min-width: 44%;
  }
  .pg-page5 .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pg-page5 .page-intro {
    grid-template-columns: 1fr;
    gap: 16px 0;
  }
  .pg-page5 .page-intro .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 14px;
  }
  .pg-page5 .search-group {
    max-width: none;
    margin-left: 0;
    width: 100%;
  }
  .pg-page6 .statement,
  .pg-page6 .reunion-card .bicol {
    grid-template-columns: 1fr;
    gap: 14px 0;
  }
  .pg-page6 .statement .en,
  .pg-page6 .reunion-card .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 14px;
  }
  .pg-page6 .credits {
    grid-template-columns: repeat(2, 1fr);
  }
  .pg-styleguide .swatch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pg-styleguide .card-demo-grid {
    grid-template-columns: 1fr 1fr;
  }
  .pg-styleguide .type-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .pg-styleguide .type-row .tag {
    width: auto;
  }
}

/* ---- RWD：窄螢幕取消浮動，改為單欄堆疊，圖片置中、文字左對齊 ---- */
@media (max-width: 768px) {
  .subsection-intro figure {
    float: none; /* 取消浮動才能回到單欄堆疊 */
    width: 100%;
    max-width: 650px;
    margin: 0 auto 16px;
  }
  .subsection-intro > .intro-text {
    overflow: visible;
    width: 100%;
  }

  .subsection-intro {
    padding: 1rem 38px;
  }
}

@media (max-width: 620px) {
  /* 全站共用：手機版 utility bar 內距收緊（原本僅 4 個頁面各自定義，此處統一套用到全站） */
  .utility-bar {
    padding: 12px 16px;
  }
  /* 全站共用：PAGE1–6 主選單在手機版收緊內距、縮小卡片，維持可橫向滑動 */
  .main-nav {
    padding: 10px 16px;
    gap: 6px;
  }
  .main-nav-item {
    min-width: 112px;
    padding: 7px 11px;
  }
  .pg-index .menu-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pg-index .fdc {
    padding: 36px 22px 44px;
  }
  .pg-index .hero-tagline {
    flex-direction: column;
    gap: 16px;
  }
  .pg-index .hero-tagline .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 16px;
  }
  .pg-page1 .field-list {
    grid-template-columns: 1fr;
  }
  .pg-page2 .page-intro {
    grid-template-columns: 1fr;
    gap: 22px 0;
  }
  .pg-page2 .page-intro .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 16px;
  }
  .pg-page2 .detail-body {
    grid-template-columns: 1fr;
    gap: 20px 0;
  }
  .pg-page2 .detail-body .en {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line-hair);
    padding-top: 16px;
  }
  .pg-page2 .detail-card {
    padding: 28px 24px;
  }
  .pg-page4 .item-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 26px 16px 80px;
  }
  .pg-page4 .subtab {
    min-width: 100%;
  }
  .pg-page5 .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 16px 16px 80px;
  }
  .pg-page5 .filter-bar {
    padding: 16px;
  }
  .pg-page6 .credits {
    grid-template-columns: 1fr;
  }
  .pg-item .artifact-wrap {
    padding: 16px 16px 80px;
  }
  .pg-item .audio-extra {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 全站共用：使用者偏好減少動態效果時，降級為近乎即時的過場 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 550px) {
  .page-head,
  .hero,
  .layout,
  .closing-hero {
    padding: 1rem;
  }
}

/* ===== Page 05 revision: fixed HTML cards / descriptions / footnote ===== */
.pg-page5 .card-description {
  margin-top: 12px;
  border-top: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  padding: 8px 0;
}
.pg-page5 .card-description summary {
  cursor: pointer;
  font-family: var(--font-zh-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--indigo-deep);
}
.pg-page5 .card-description summary span {
  font-family: var(--font-en-sans);
  font-size: 10px;
  font-weight: 400;
  color: #6b675f;
}
.pg-page5 .card-description-body {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.9;
  color: #4a463f;
}
.pg-page5 .card-description-body p {
  margin: 0 0 10px;
}
.pg-page5 .card-description-body p:last-child {
  margin-bottom: 0;
}
.pg-page5 .view-record.is-unavailable {
  border-bottom-style: dashed;
  color: #8a867d;
  cursor: default;
}
.pg-page5 .section-note {
  position: relative;
  z-index: 1;
  max-width: 1184px;
  margin: 22px auto 0;
  padding: 18px 22px;
  background: var(--envelope-cream);
  border-left: 3px solid var(--postmark-red);
}
.pg-page5 .section-note[hidden] {
  display: none;
}
.pg-page5 .section-note > p {
  margin: 0 0 10px;
  line-height: 1.8;
}
.pg-page5 .section-note .en {
  font-family: var(--font-en-sans);
  font-size: 12px;
  color: #5a564e;
}
.pg-page5 .footnotes {
  margin: 10px 0 0;
  padding-left: 22px;
  font-size: 12px;
  line-height: 1.7;
  color: #5a564e;
}
.pg-page5 .section-note sup a {
  color: var(--postmark-red);
  text-decoration: none;
}
.pg-page5 .cover-stamp img {
  object-fit: contain;
  background: var(--paper-ivory);
}

@media (max-width: 500px) {
  .pg-page5 .subtabs {
    flex-wrap: nowrap;
  }

  .pg-page5 .subtab {
    padding: 11px 3px;
  }

  .figure-anchor-nav {
    gap: 20px 10px;
  }

  .pg-item .stamp-corner-badge.year {
    top: -10px;
    right: -7px;
    }
.pg-item .stamp-corner-badge.exhibit-no {
    top: -10px;
    left: -4px;
}

}

@media (max-width: 414x) {
  .figure-anchor-nav {
    gap: 20px 10px;
  }
}

@media (max-width: 375px) {
  .subsection-intro {
    padding: 1rem 5px;
  }
}
/* ============================================================
   PAGE 04 / 家學與知交：人物分類 — 每位人物一個 div 段落
   ------------------------------------------------------------
   結構：
   1. .family-person 是每位人物的完整段落（人物介紹 + 展件卡 + 素材），
      對應「人物分類.jpg」的 8 個分類，是 #itemGrid 底下的 grid item。
   2. 段落內部：<section class="exhibit-context"> 放人物介紹文字，
      <div class="family-work-group"> 放展件卡與裝飾素材。
   3. 所有素材圖片一律不寫在 HTML 的 src 屬性裡，改由 CSS ::before
      偽元素的 background-image 呈現，位置依 p4.png 紅框逐一核對。
   ------------------------------------------------------------ */

.pg-page4 .family-person {
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
}

.pg-page4 .family-work-group {
  position: relative;
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
  isolation: isolate;
  overflow: visible;
  padding: 10px 0 28px;
}

.pg-page4 .family-card-row {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}
.pg-page4 .family-card-row .item-card {
  width: 100%;
  min-width: 0;
}
@media (max-width: 980px) {
  .pg-page4 .family-card-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 820px) {
  .pg-page4 .family-card-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 620px) {
  .pg-page4 .family-card-row {
    grid-template-columns: 1fr;
  }
  .pg-page4 .family-work-group {
    min-height: 0 !important;
    padding-bottom: 24px !important;
  }
}

/* 裝飾素材只相對於所在人物的 family-work-group 定位。 */
.pg-page4 .family-decor-slot {
  position: absolute;
  z-index: 1;
  display: block;
  pointer-events: none;
  user-select: none;
  height: var(--slot-height, 300px);
  opacity: 1;
}
.pg-page4 .family-decor-slot > * {
  display: block;
  max-width: none;
  user-select: none;
}

/* ------------------------------------------------------------
   紅框 1：小川琢治 — 魚群 +「知魚樂」
   ------------------------------------------------------------ */
.family-work-group--takuji {
  min-height: 360px;
}
.family-work-group--takuji .p4-pos-01 {
left: -15%;
    top: -100%;
    width: 55%;
    --slot-height: 279px;
}
.p4-pos-01 .fish-a {
  left: 0%;
  top: 18%;
  width: 42%;
}
.p4-pos-01 .fish-b {
left: 68%;
    top: 42%;
    width: 20%;
}
.p4-pos-01 .fish-c {
  left: 48%;
  top: 59%;
  width: 30%;
}
.p4-pos-01 .page4-fishword {
  position: absolute;
  right: 0;
  bottom: -76%;
  width: 27%;
}

/* 紅框 2：貝塚茂樹 — 水墨松樹 + 羊 */
.family-work-group--kaizuka {
  min-height: 420px;
}
.family-work-group--kaizuka .p4-pos-02 {
  right: 0;
  top: -2%;
  width: 55%;
  --slot-height: 390px;
}
.p4-pos-02 .page4-bg1 {
position: absolute;
    right: -39%;
    top: -41%;
    width: 110%;
  animation: page4InkDriftRight 17s ease-in-out infinite;
}
.p4-pos-02 .goat-a {
    position: absolute;
    left: 46%;
    bottom: -26%;
    width: 21%;
}
.p4-pos-02 .snow-a {
  left: 1%;
  top: 0;
  width: 9%;
}

/* 紅框 3、4：小川環樹 — 水墨松樹 + 落款 + 魚 + 大井本店建築出血 */
.family-work-group--tamaki {
  min-height: 620px;
  padding-bottom: 150px;
}
.family-work-group--tamaki .p4-pos-03 {
  right: 0;
  top: 3%;
  width: 61%;
  --slot-height: 400px;
}
.p4-pos-03 .page4-bg2 {
  position: absolute;
  left: 0;
  top: 0;
  width: 88%;
  animation: page4InkDriftLeft 18s ease-in-out infinite;
}
.p4-pos-03 .sign-a {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 9%;
}
.p4-pos-03 .snow-b {
    right: 28%;
    top: 81%;
    width: 7%;
}
.family-work-group--tamaki .p4-pos-04 {
  right: 2%;
  bottom: 0;
  width: 43%;
  --slot-height: 230px;
}
.p4-pos-04 .fish-d {
      right: -8%;
    top: 12%;
    width: 26%;
}
.p4-pos-04 .fish-e {
right: 0;
    bottom: 57%;
    width: 18%;
}
.p4-pos-04 .snow-c {
  left: 0;
  top: 0;
  width: 9%;
}
/* 大井本店建築水彩畫：從人物介紹左側出血，填補小川環樹沒有人物照片的視覺留白 */
#ctxTamaki {
  position: relative;
}
#ctxTamaki .intro-text {
  position: relative;
  z-index: 1;
}
.family-person--tamaki .page4-building {
  position: absolute;
    left: -86%;
    top: 9%;
    width: 240px;
  max-width: 34vw;
  z-index: 0;
  pointer-events: none;
  user-select: none;
}
@media (max-width: 1024px) {
  .family-person--tamaki .page4-building {
    left: -90px;
    width: 240px;
  }
}
@media (max-width: 768px) {
  .family-person--tamaki .page4-building {
    display: none;
  }
}

/* 紅框 5：中谷宇吉郎 — 水墨松樹 + 羊 */
.family-work-group--nakaya {
  min-height: 500px;
}
.family-work-group--nakaya .p4-pos-05 {
  right: 0;
  top: 3%;
  width: 63%;
  --slot-height: 440px;
}
.p4-pos-05 .bg1-b {
  position: absolute;
  right: -3%;
  top: 0;
  width: 97%;
  animation: page4InkDriftRight 19s ease-in-out infinite;
}
.p4-pos-05 .goat-b {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 18%;

}
.p4-pos-05 .snow-d {
right: 32%;
    top: -9%;
    width: 7%;
}

/* 紅框 6：山本由定 — 雪花群 + 落款 */
.family-work-group--yamamoto {
  min-height: 410px;
}
.family-work-group--yamamoto .p4-pos-06 {
  right: 1%;
  top: 8%;
  width: 60%;
  --slot-height: 330px;
}
.p4-pos-06 .snow-e {
  left: 10%;
  top: 0;
  width: 12%;
}
.p4-pos-06 .snow-f {
  left: 42%;
  top: 38%;
  width: 11%;
}
.p4-pos-06 .snow-g {
  right: 15%;
  top: 16%;
  width: 10%;
}
.p4-pos-06 .sign-b {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 5.5%;
}

/* 紅框 7：西田幾多郎 — 冰晶 */
.family-work-group--nishida {
  min-height: 410px;
}
.family-work-group--nishida .p4-pos-07 {
  right: 0;
  top: 6%;
  width: 62%;
  --slot-height: 340px;
}
.p4-pos-07 .ice-a {
  left: 8%;
  top: 15%;
  width: 12%;
  transform: rotate(-10deg);
}
.p4-pos-07 .ice-b {
  right: 0;
  bottom: 5%;
  width: 22%;
  transform: rotate(30deg);
}
.p4-pos-07 .snow-h {
  right: 18%;
  top: 0;
  width: 9%;
  transform:scaleX(-1);
}

/* 紅框 8：內藤湖南 — 單一雪花 */
.family-work-group--naito {
  min-height: 390px;
}
.family-work-group--naito .p4-pos-08 {
  left: 1%;
  top: 14%;
  width: 36%;
  --slot-height: 240px;
}
.p4-pos-08 .snow-i {
  left: 8%;
  top: 12%;
  width: 14%;
}

span.page4-fixed-snow.snow-g {
    width: 20%;
    bottom: 0;
    right: 0;
    opacity: 0.4;
}

/* 紅框 9、10：小川、湯川與中谷家族書畫帖 — 冰晶 + 魚群 +「知魚樂」 */
.family-work-group--album {
  min-height: 660px;
  padding-bottom: 250px;
}
.family-work-group--album .p4-pos-09 {
  right: 1%;
  top: 4%;
  width: 59%;
  --slot-height: 330px;
}
.p4-pos-09 .ice-c {
  left: 0;
  top: 0;
    width: 19%;
  transform: rotate(-6deg);
}
.p4-pos-09 .snow-j {
  right: 7%;
  top: 10%;
  width: 10%;

}
.p4-pos-09 .snow-k {
  left: 27%;
  bottom: 0;
  width: 14%;
}
.family-work-group--album .p4-pos-10 {
  right: 0;
  bottom: 0;
  width: 46%;
  --slot-height: 245px;
}


 .fish-f {
left: -37%;
    top: -18%;
    width: 62%;
}
.fish-g {
  left: 29%;
  top: 51%;
  width: 42%;
}
.fish-h {
  right: 3%;
  top: 39%;
  width: 31%;
}
.fishword-b {
position: absolute;
    right: -15%;
    bottom: 22%;
    width: 24%;

    }


.snow-l {
left: 72%;
    bottom: -79%;
    width: 10%;
}





/* 湯川蜻洋（展件11）沒有人物介紹卡，維持獨立卡片，不加裝飾。 */

/* ------------------------------------------------------------
   共用：魚 / 羊 / 落款 / 水墨 / 固定冰雪 / 建築
   ------------------------------------------------------------
   圖片路徑說明：
   style.css 位於 assets/css/，因此要讀取 assets/images/decor/
   必須使用 ../images/decor/xxx.png，而不是 assets/images/decor/xxx.png。

   偽元素統一採 background-image 呈現，避免 content:url() 在尺寸、
   object-fit 與動畫控制上的不穩定。
   ------------------------------------------------------------ */

/* ===== 偽元素共用基礎 ===== */
.page4-fish-agent::before,
.page4-goat::before,
.page4-sign::before,
.page4-bg1::before,
.page4-bg2::before,
.page4-fixed-snow::before,
.page4-fixed-ice::before,
.page4-fishword::before,
.page4-building::before,
.page4-snow-flake::before {
  content: "";
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  pointer-events: none;
  user-select: none;
}

/* ===== 魚 fish.png ===== */
.page4-fish-agent {
  position: absolute;
  display: block;
  aspect-ratio: 1456 / 536;
  animation: page4FishFloat 5.2s ease-in-out infinite;
  will-change: transform;
}
.page4-fish-agent:nth-of-type(2n) {
  animation-delay: -1.9s;
}
.page4-fish-agent:nth-of-type(3n) {
  animation-delay: -3.1s;
}
.page4-fish-agent::before {
  background-image: url("../images/decor/fish.png");
  opacity: 0.72;
  mix-blend-mode: multiply;
  transition: transform 620ms cubic-bezier(0.2, 0.76, 0.32, 1);
  will-change: transform;
}
.page4-fish-agent.is-fleeing::before {
  transform: translate3d(
      var(--fish-flee-x, -150px),
      var(--fish-flee-y, -22px),
      0
    )
    rotate(var(--fish-turn, -4deg)) scale(0.94);
  transition-duration: 430ms;
}

/* ===== 羊 goat.png =====
   固定在原地，不做任何動畫／transition／hover 互動。
   僅保留 --goat-flip 讓 goat-aa 維持左右水平翻轉。
   ------------------------------------------------------------ */
.page4-goat {
  aspect-ratio: 2888 / 2768;
  --goat-flip: -1;
}

/* goat-aa 左右水平翻轉，跟其他羊隻方向相反 */
.goat-aa {
  --goat-flip: 1;
}

.page4-goat::before {
  background-image: url("../images/decor/goat.png");
  opacity: 0.53;
  mix-blend-mode: multiply;
  transform: scaleX(var(--goat-flip, -1));
}

/* ===== 落款 sign.png ===== */
.page4-sign {

  animation: page4SignFloat 9.5s ease-in-out infinite;
}
.page4-sign::before {
  background-image: url("../images/decor/sign.png");
  opacity: 0.82;
  mix-blend-mode: multiply;
}

/* ===== 水墨 bg1.png / bg2.png ===== */

 .page4-ink {
    animation: none;
  }

.page4-bg1 {

}

.page4-bg1::before {
  background-image: url("../images/decor/bg1.png");
  opacity: 0.47;
  mix-blend-mode: multiply;
}

.page4-bg2 {
  aspect-ratio: 1500 / 1326;
}


.page4-bg2::before {
  background-image: url("../images/decor/bg2.png");
  opacity: 0.5;
  mix-blend-mode: multiply;
}

/* ===== 固定雪花 ice3.png / ice2.png ===== */
.page4-fixed-snow,
.page4-fixed-ice {
  position: absolute;
  height: auto;
  animation: page4FixedSnowFloat 8s ease-in-out infinite;
}

.snow-a,
.snow-c,
.snow-d,
.snow-e,
.snow-g,
.snow-h,
.snow-i,
.snow-j,
.snow-l {
  aspect-ratio: 446 / 460; /* ice3.png */
}
.snow-a::before,
.snow-c::before,
.snow-d::before,
.snow-e::before,
.snow-g::before,
.snow-h::before,
.snow-i::before,
.snow-j::before,
.snow-l::before {
  background-image: url("../images/decor/ice3.png");
  opacity: 0.46;
  mix-blend-mode: multiply;
}

.snow-b,
.snow-f,
.snow-k {
  aspect-ratio: 614 / 562; /* ice2.png */
}
.snow-b::before,
.snow-f::before,
.snow-k::before {
  background-image: url("../images/decor/ice2.png");
  opacity: 0.6;
  mix-blend-mode: multiply;
}

/* ===== 冰晶 ice.png ===== */
.page4-fixed-ice {
  aspect-ratio: 492 / 397;
}
.page4-fixed-ice::before {
  background-image: url("../images/decor/ice.png");
  opacity: 0.38;
  mix-blend-mode: multiply;
}

/* ===== 落雪／落冰動態層 ice.png / ice2.png / ice3.png =====
   與上方「固定冰雪」不同：此組為整頁飄落效果，節點由 page4.html
   直接寫死（非 JS 產生），透過行內 CSS 變數（--x/--size/--duration/
   --delay/--rot/--drift）帶入各自隨機值。data-img 對應三種素材。 */
.page4-snowfall {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.page4-snow-flake {
  position: absolute;
  top: -10vh;
  left: var(--x, 50%);
  width: var(--size, 24px);
  height: var(--size, 24px);
  opacity: 0;
  animation: page4SnowFall var(--duration, 15s) linear infinite;
  animation-delay: var(--delay, 0s);
  will-change: transform, opacity;
}

.page4-snow-flake::before {
  mix-blend-mode: multiply;
}

.page4-snow-flake[data-img="1"]::before {
  background-image: url("../images/decor/ice.png");
}

.page4-snow-flake[data-img="2"]::before {
  background-image: url("../images/decor/ice2.png");
}

.page4-snow-flake[data-img="3"]::before {
  background-image: url("../images/decor/ice3.png");
}

/* ===== 知魚樂 fishword.png ===== */
.page4-fishword {
  aspect-ratio: 4524 / 1480;
}
.page4-fishword::before {
  background-image: url("../images/decor/fishword.png");
  opacity: 0.82;
  mix-blend-mode: multiply;
}

/* ===== 建築 展區3-2-4舞姫.png ===== */
.page4-building {
  aspect-ratio: 1716 / 3032;
}
.page4-building::before {
  background-image: url("../images/decor/展區3-2-4舞姫.png");
}

/* ---------- 動畫 ---------- */
@keyframes page4FishFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0) rotate(-1.5deg);
  }
  35% {
    transform: translate3d(-7px, -9px, 0) rotate(1deg);
  }
  70% {
    transform: translate3d(5px, 5px, 0) rotate(-0.5deg);
  }
}
@keyframes page4InkDriftLeft {
  0%,
  100% {
    transform: translate3d(-4px, 4px, 0) scale(0.985);
  }
  50% {
    transform: translate3d(14px, -9px, 0) scale(1.015);
  }
}
@keyframes page4InkDriftRight {
  0%,
  100% {
    transform: translate3d(6px, -3px, 0) scale(1);
  }
  50% {
    transform: translate3d(-12px, 10px, 0) scale(1.018);
  }
}
@keyframes page4SignFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0) rotate(-1.5deg);
  }
  50% {
    transform: translate3d(-4px, -10px, 0) rotate(10deg);
  }
}
@keyframes page4FixedSnowFloat {
  0%,
  100% {
    margin-top: 0;
    transform: rotate(-6deg);
  }
  50% {
    margin-top: -10px;
    transform: rotate(180deg);
  }
}
@keyframes page4SnowFall {
  0% {
    transform: translate3d(0, -10vh, 0) rotate(0deg);
    opacity: 1;
  }
  75% {
    opacity: .5;
  }
  100% {
    /* --duration 介於 7s–19s，淡出區段固定佔最後 25%，
       實際淡出時間約落在 1.75s–4.75s，符合落下後約 1–5 秒淡出的需求 */
    transform: translate3d(var(--drift, 0), 110vh, 0) rotate(var(--rot, 180deg));
    opacity: 0;
  }
}

/* ---------- RWD：裝飾素材隨螢幕縮小淡化、縮小，避免蓋住卡片文字 ---------- */
@media (max-width: 980px) {
  .pg-page4 .family-decor-slot {
    opacity: 0.72;
    transform: scale(0.86);
    transform-origin: top right;
  }
  .family-work-group--takuji .p4-pos-01,
  .family-work-group--naito .p4-pos-08 {
    transform-origin: top left;
  }
}
@media (max-width: 820px) {
  .pg-page4 .family-decor-slot {
    opacity: 0.46;
    transform: scale(0.7);
  }
}
@media (max-width: 620px) {
  .pg-page4 .family-decor-slot {
    opacity: 0.24;
    transform: scale(0.48);
  }
  .page4-snowfall {
    opacity: 0.6;
  }
  .page4-snow-flake:nth-child(3n) {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page4-fish-agent,
  .page4-sign,
  .page4-fixed-snow,
  .page4-fixed-ice,
  .page4-ink {
    animation: none !important;
  }
  .page4-fish-agent::before {
    transition: none;
  }
  .page4-snowfall {
    display: none;
  }
}

/* ============================================================
   PAGE 04 / p4.png 對位修正版：bg1 / bg2 / goat / sign
   ------------------------------------------------------------
   原則：
   1. 不再用固定 min-height 或推算整頁高度定位。
   2. 每組素材都以所在人物的 .family-work-group / .family-card-row
      為相對基準；top:0 對齊該人物作品卡的上緣。
   3. p4-pos-02 / 03 / 05 / 06 的水平位置比照 p4.png 紅框與旁邊
      作品卡的相對關係。
   ============================================================ */

/* 這四組不再靠人為拉高高度製造定位空間 */
.pg-page4 .family-work-group--kaizuka,
.pg-page4 .family-work-group--tamaki,
.pg-page4 .family-work-group--nakaya,
.pg-page4 .family-work-group--yamamoto {
  min-height: 0;
}

.pg-page4 .family-work-group--tamaki {
  padding-bottom: 28px;
}

/* 素材本身使用正確原始比例 */
.pg-page4 .page4-bg1 {
    position: absolute;
    aspect-ratio: 2048 / 1654;
    width: 130%;
    top: 191%;
    right: -149%;
}

.pg-page4 .page4-bg2 {
position: absolute;
    width: 100%;
    right: -27%;
}

.pg-page4 .page4-goat {
  position: absolute;
  aspect-ratio: 2048 / 1962;
}

.pg-page4 .page4-sign {
  position: absolute;
  aspect-ratio: 632 / 1784;
  animation: page4SignFloat 9.5s ease-in-out infinite;
}

/* ------------------------------------------------------------
   紅框 2 / 貝塚茂樹
   p4.png：作品卡在左，bg1 + goat 緊接在作品卡右側，頂端對齊作品。
   ------------------------------------------------------------ */
.pg-page4 .family-work-group--kaizuka .p4-pos-02 {
  left: 31%;
  right: -1%;
  top: 0;
  bottom: 0;
  width: auto;
  height: auto;
}

.pg-page4 .family-work-group--kaizuka .p4-pos-02 .page4-bg1 {
  right: -3%;
  top: -10%;
  width: 94%;
}

.pg-page4 .family-work-group--kaizuka .p4-pos-02 .goat-a {
  left: 4%;
  bottom: -3%;
  width: 17%;
}

.goat-aa{
  left: 4%;
  bottom: -3%;
  width: 17%;
}



/* ------------------------------------------------------------
   紅框 3 / 小川環樹
   現在 HTML 的同一容器同時有 p4-pos-03 p4-pos-04，
   因此用 combined selector 鎖定，不拆 HTML 結構。
   bg2 位於兩張作品卡右側區域，sign 貼紅框右緣。
   ------------------------------------------------------------ */
.pg-page4 .family-work-group--tamaki .p4-pos-03.p4-pos-04 {
  left: 33%;
  right: -1%;
  top: 0;
  bottom: 0;
  width: auto;
  height: auto;
}

.pg-page4 .family-work-group--tamaki .p4-pos-03.p4-pos-04 .page4-bg2 {
  left: 5%;
  top: -8%;
  width: 82%;
}

.pg-page4 .family-work-group--tamaki .p4-pos-03.p4-pos-04 .sign-a {
  right: 0;
  bottom: -2%;
  width: 7.5%;
}

/* ------------------------------------------------------------
   紅框 5 / 中谷宇吉郎
   p4.png：紅框在作品卡右側，但 bg1 的枝幹本身向左大幅出血；
   因此容器仍以作品卡右側為基準，只讓圖片本身向左延伸。
   ------------------------------------------------------------ */
.pg-page4 .family-work-group--nakaya .p4-pos-05 {
  left: 32%;
  right: -1%;
  top: 0;
  bottom: 0;
  width: auto;
  height: auto;
}

.pg-page4 .family-work-group--nakaya .p4-pos-05 .bg1-b {
 left: -56%;
    top: -28%;
    width: 113%;
}

.pg-page4 .family-work-group--nakaya .p4-pos-05 .goat-b {
    left: 91%;
    bottom: -6%;
    width: 14%;
}

/* ------------------------------------------------------------
   紅框 6 / 山本由定
   sign 只依作品卡區塊定位：貼紅框右下角，不用整頁高度。
   ------------------------------------------------------------ */
.pg-page4 .family-work-group--yamamoto .p4-pos-06 {
  left: 32%;
  right: 5%;
  top: 0;
  bottom: 0;
  width: auto;
  height: auto;
}

.pg-page4 .family-work-group--yamamoto .p4-pos-06 .sign-b {
right: 15%;
    top: 0;
    width: 7%;
}


span.page4-goat.goat-aa {
    top: 74%;
    left: -80%;
    width: 13%;
}


/* 圖片來源：style.css 在 assets/css/，所以必須使用 ../images/decor/
   翻轉用 scaleX(var(--goat-flip)) 靜態宣告在 .page4-goat::before，
   此處覆寫沒有再設定 transform，因此翻轉設定會照常生效。 */
.pg-page4 .page4-goat::before {
  background-image: url("../images/decor/goat.png");
  opacity: 1;
  mix-blend-mode: multiply;
}

/* goat-aa：明顯度降低 30%（1 * 0.7） */
.pg-page4 .page4-goat.goat-aa::before {
  opacity: 0.7;
}

.pg-page4 .page4-sign::before {
  background-image: url("../images/decor/sign.png");
  opacity: 0.82;
  mix-blend-mode: multiply;
}

.pg-page4 .page4-bg1::before {
  background-image: url("../images/decor/bg1.png");
  opacity: 0.47;
  mix-blend-mode: multiply;
}

.pg-page4 .page4-bg2::before {
  background-image: url("../images/decor/bg2.png");
  opacity: 0.50;
  mix-blend-mode: multiply;
}

/* 平板：仍維持「作品左、素材右」的相對概念，不使用固定高度 */
@media (max-width: 820px) {
  .pg-page4 .family-work-group--kaizuka .p4-pos-02,
  .pg-page4 .family-work-group--tamaki .p4-pos-03.p4-pos-04,
  .pg-page4 .family-work-group--nakaya .p4-pos-05,
  .pg-page4 .family-work-group--yamamoto .p4-pos-06 {
    left: 46%;
    right: -4%;
  }

  .pg-page4 .family-work-group--nakaya .p4-pos-05 .bg1-b {
    left: -48%;
    width: 145%;
  }
}

/* 手機單欄：素材留在卡片右後方，避免直接蓋住主要作品卡 */
@media (max-width: 620px) {
  .pg-page4 .family-work-group--kaizuka .p4-pos-02,
  .pg-page4 .family-work-group--tamaki .p4-pos-03.p4-pos-04,
  .pg-page4 .family-work-group--nakaya .p4-pos-05,
  .pg-page4 .family-work-group--yamamoto .p4-pos-06 {
    left: 55%;
    right: -18%;
    opacity: 0.72;
  }
}