:root {
  --bg: #060607;
  --cream: #e8e4d5;
  --pink: #e71f5d;
  --ink: #0b0b0d;
  --mint: #00c287;
  --border: #202126;
  --muted: #a6a39a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Times New Roman", Times, serif;
  background: var(--bg);
  color: var(--cream);
}

.stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  border: 1px solid var(--border);
  background: #0a0a0c;
  overflow: hidden;
}

.stage-header {
  position: absolute;
  z-index: 20;
  left: 0;
  right: 0;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}

.stage-header p {
  margin: 0;
  color: #171719;
}

.header-controls {
  display: flex;
  gap: 0.6rem;
}

.menu-button {
  border: 0;
  background: transparent;
  color: #262626;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.view {
  position: absolute;
  inset: 0;
  min-height: 100vh;
  transition: transform 560ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 420ms ease;
}

.view-overview {
  display: grid;
  grid-template-rows: minmax(0, 61.8vh) minmax(0, 38.2vh);
  transform: translateX(0);
  opacity: 1;
  overflow: hidden;
  overflow-x: hidden;
  --hero-shift: 0px;
  --cards-shift: 0px;
}

.view-detail {
  display: grid;
  grid-template-columns: 62% 38%;
  transform: translateX(100%);
  opacity: 0;
  pointer-events: none;
}

.mode-detail .view-overview {
  transform: translateX(-22%);
  opacity: 0;
  pointer-events: none;
}

.mode-detail .view-detail {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.cream {
  background: var(--cream);
  color: var(--ink);
}

.intro-panel {
  padding: 4.4rem 1.7rem 1.35rem;
  display: grid;
  align-content: start;
  gap: 0.72rem;
  position: relative;
  z-index: 4;
  transform: translateY(var(--hero-shift));
  transition: transform 120ms linear;
}

.intro-panel h1 {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  display: block;
  max-width: 100%;
  opacity: 0;
  filter: blur(10px);
  transform: translateY(16px) scale(1.02);
  animation: filmReveal 980ms cubic-bezier(0.2, 0.7, 0.2, 1) 120ms forwards;
}

.hero-topline {
  display: block;
  white-space: nowrap;
  font-family: "Cormorant Garamond", serif;
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: clamp(1.55rem, 3.2vw, 3rem);
  font-weight: 500;
  opacity: 0.96;
  line-height: 0.92;
}

.hero-line-two {
  display: block;
  letter-spacing: -0.004em;
  font-size: clamp(3.3rem, 8.4vw, 7.8rem);
  line-height: 0.9;
  font-weight: 500;
  opacity: 0.96;
  mix-blend-mode: multiply;
  margin-top: 0.04em;
  margin-bottom: 0.18em;
}

.hero-zh-top,
.hero-zh-bottom {
  display: inline-block;
}

html[lang="zh-CN"] .intro-panel h1 {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0;
  max-width: 100%;
  color: #07080a;
  position: relative;
}

html[lang="zh-CN"] .hero-topline {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  text-transform: none;
  letter-spacing: 0.08em;
  font-size: clamp(1.35rem, 3.1vw, 2.5rem);
  line-height: 0.95;
  font-weight: 500;
  opacity: 0.95;
}

html[lang="zh-CN"] .hero-line-two {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: clamp(3.2rem, 8.2vw, 6.6rem);
  line-height: 0.96;
  font-weight: 600;
  margin-top: 0.14em;
  margin-bottom: 0.22em;
  mix-blend-mode: normal;
}

html[lang="zh-CN"] .hero-zh-one {
  display: block;
  letter-spacing: 0.03em;
  font-size: clamp(3.15rem, 7.8vw, 6.1rem);
  line-height: 0.98;
  margin-top: 0.04em;
  margin-bottom: 0.3em;
}

html[lang="zh-CN"] .intro-panel p {
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(1.03rem, 1.2vw, 1.22rem);
  line-height: 1.72;
  max-width: 38ch;
  margin-top: 1.2rem;
  line-break: strict;
  text-wrap: pretty;
  padding: 0;
  border-left: 0;
  background: transparent;
}

html[lang="zh-CN"] .intro-panel {
  padding-top: 6.9rem;
  padding-left: clamp(1.6rem, 3.2vw, 3.6rem);
  gap: 1.15rem;
}

.intro-panel p {
  margin: 0;
  max-width: 45rem;
  font-size: clamp(1rem, 1.08vw, 1.13rem);
  line-height: 1.46;
  margin-top: 0.5rem;
  opacity: 0;
  filter: blur(8px);
  transform: translateY(12px) scale(1.01);
  animation: filmReveal 860ms cubic-bezier(0.2, 0.7, 0.2, 1) 360ms forwards;
}

.chapter-scroller {
  position: relative;
  border-top: 1px solid rgba(0, 0, 0, 0.18);
  overflow: hidden;
  background: #06070a;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  margin-top: 0;
  z-index: 6;
  transform: translateY(var(--cards-shift));
  transition: transform 120ms linear;
  box-shadow: 0 -18px 45px rgba(0, 0, 0, 0.24);
}

.chapter-grid {
  display: flex;
  gap: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.45) transparent;
  cursor: grab;
  min-height: 0;
  height: 100%;
}

.chapter-grid:active {
  cursor: grabbing;
}

.chapter-card {
  flex: 0 0 42vw;
  min-width: 420px;
  padding: 0.9rem 0.72rem 1.05rem;
  border-right: 1px solid rgba(0, 0, 0, 0.35);
  background-image:
    linear-gradient(180deg, rgba(8, 8, 10, 0.28), rgba(8, 8, 10, 0.7)),
    var(--card-image, linear-gradient(135deg, #4b3d2d 0%, #2a241d 100%));
  background-size: cover;
  background-position: center;
  color: #f2efe6;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  min-height: 0;
  height: 100%;
  transition: transform 240ms ease;
  scroll-snap-align: start;
}

.chapter-card-top {
  display: grid;
  gap: 0.55rem;
}

.chapter-card-bottom {
  display: grid;
  gap: 0.42rem;
  align-content: end;
}

.chapter-card:hover {
  transform: translateY(-6px);
}

.chapter-card:nth-child(even) {
  filter: saturate(1.04);
}

.chapter-index {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.2;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
}

.chapter-range {
  margin: 0;
  font-size: clamp(1.8rem, 3.5vw, 3.8rem);
  line-height: 0.92;
  font-family: "Times New Roman", Times, serif;
  font-weight: 500;
}

.chapter-title {
  margin: 0 0 0.12rem;
  font-weight: 500;
  font-size: clamp(1.36rem, 1.7vw, 1.82rem);
  line-height: 1.14;
  max-width: 92%;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.78);
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.chapter-meta {
  margin: 0 0 0.18rem;
  font-size: 0.92rem;
  opacity: 0.96;
  line-height: 1.25;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.68);
}

.chapter-button {
  justify-self: start;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(0, 0, 0, 0.32);
  color: #f6f2e8;
  border-radius: 999px;
  padding: 0.38rem 0.86rem;
  margin-top: 0.05rem;
  cursor: pointer;
}

.chapter-scroll-hint {
  position: absolute;
  right: 0.8rem;
  bottom: 4.2rem;
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 230, 0.72);
  pointer-events: none;
}

.chapter-info {
  display: none;
}

.site-info-text {
  margin: 0;
  color: rgba(243, 238, 227, 0.82);
  font-size: 0.77rem;
  line-height: 1.2;
}

.site-info-text:empty {
  display: none;
}

.site-info-text + .site-info-text {
  margin-top: 0.25rem;
}

#contactEmail {
  color: #c7d8ff;
  text-decoration: underline;
}

.media-panel {
  position: relative;
  background: #070708;
  overflow: hidden;
  cursor: pointer;
}

.media-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--media-image, linear-gradient(120deg, #1f2330 0%, #161920 60%, #0f1015 100%));
  background-size: cover;
  background-position: center;
  filter: brightness(0.85) sepia(0.05) contrast(1.02) saturate(1.08);
  transform: scale(1.03);
  transition: background-image 300ms ease;
}

.media-tint {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.42) 0%,
    rgba(0, 0, 0, 0.24) 30%,
    rgba(0, 0, 0, 0.1) 54%,
    rgba(0, 0, 0, 0) 72%
  );
  transition: opacity 220ms ease;
}

.media-content {
  position: absolute;
  z-index: 5;
  bottom: 4.4rem;
  left: 1.45rem;
  right: 1.2rem;
  max-width: min(86%, 860px);
  padding: 0;
  background: transparent;
  border-left: none;
  backdrop-filter: none;
  border-radius: 0;
  transition: opacity 220ms ease;
}

.media-panel.focus-off .media-tint,
.media-panel.focus-off .media-content {
  opacity: 0;
}

.period-tag {
  margin: 0;
  color: var(--cream);
  font-size: 0.84rem;
  letter-spacing: 0.09em;
  opacity: 0.95;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.75);
}

.media-content h2 {
  margin: 0.38rem 0 0.62rem;
  font-family: "Times New Roman", Times, serif;
  font-weight: 500;
  font-size: clamp(2.15rem, 5.8vw, 5.4rem);
  line-height: 0.96;
  letter-spacing: 0.01em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.62);
}

.media-content h2 .title-line {
  display: block;
  white-space: nowrap;
}

.detail-sub {
  margin: 0;
  max-width: 560px;
  font-size: clamp(1rem, 1.35vw, 1.2rem);
  line-height: 1.45;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.75);
}

.media-content.long-title h2 {
  font-size: clamp(1.9rem, 4.9vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: 0;
  margin-bottom: 0.48rem;
}

.media-content.long-title .detail-sub {
  font-size: clamp(0.96rem, 1.22vw, 1.08rem);
  line-height: 1.42;
  max-width: 44ch;
  opacity: 0.96;
}

html[lang="en"] .period-tag {
  margin-bottom: 0.22rem;
}

html[lang="en"] .media-content h2 {
  font-size: clamp(2.5rem, 6.8vw, 6.3rem);
  line-height: 0.94;
  letter-spacing: 0.012em;
  margin-bottom: 0.7rem;
}

html[lang="en"] .detail-sub {
  font-size: clamp(1rem, 1.32vw, 1.16rem);
  line-height: 1.48;
  max-width: 36ch;
}

html[lang="zh-CN"] .period-tag {
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.56rem;
}

html[lang="zh-CN"] .media-content h2 {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(2.72rem, 8vw, 6rem);
  line-height: 1.08;
  letter-spacing: 0.03em;
  margin: 0 0 0.66rem;
}

html[lang="zh-CN"] .detail-sub {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(1.06rem, 1.48vw, 1.34rem);
  line-height: 1.52;
  letter-spacing: 0.01em;
  margin-top: 0.24rem;
}

html[lang="zh-CN"] .media-content.long-title h2 {
  font-size: clamp(2.05rem, 5.9vw, 3.9rem);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

html[lang="zh-CN"] .media-content.long-title .detail-sub {
  font-size: clamp(0.98rem, 1.25vw, 1.16rem);
  line-height: 1.46;
  max-width: 22ch;
}

.info-panel {
  position: relative;
  padding: 4rem 1.25rem 4.5rem;
  display: grid;
  align-content: start;
  gap: 1rem;
  overflow-y: auto;
  scrollbar-width: thin;
}

.detail-top-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.back-button,
.chapter-nav-btn {
  justify-self: start;
  border: 1px solid rgba(0, 0, 0, 0.3);
  background: transparent;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
}

.detail-year {
  margin: 0;
  font-family: "Times New Roman", Times, serif;
  font-weight: 500;
  font-size: clamp(2.6rem, 5vw, 4.7rem);
  line-height: 0.9;
}

.detail-body {
  margin: 0;
  max-width: 64ch;
  font-size: 1.01rem;
  line-height: 1.74;
  color: #141414;
}

.detail-sections {
  display: grid;
  gap: 0.78rem;
  max-width: 66ch;
}

.detail-section {
  display: grid;
  gap: 0.28rem;
  padding: 0.54rem 0.62rem 0.6rem;
  border-left: 2px solid rgba(0, 0, 0, 0.22);
  background: rgba(0, 0, 0, 0.03);
}

.detail-section-title {
  margin: 0;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  color: rgba(12, 12, 12, 0.86);
}

.detail-section-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #1f1f1f;
  text-wrap: pretty;
}

.detail-region {
  margin: 0.12rem 0 0;
  font-size: 0.9rem;
  color: #262626;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.33rem 0.68rem;
  border-radius: 999px;
  background: #111;
  color: #f2ecda;
  font-size: 0.8rem;
}

.detail-taxonomy {
  display: grid;
  gap: 0.62rem;
  margin-top: 0.2rem;
}

.detail-tag-row {
  display: grid;
  gap: 0.34rem;
}

.detail-tag-label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: rgba(20, 20, 20, 0.72);
}

.detail-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.38rem;
}

.detail-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.58rem;
  border-radius: 999px;
  font-size: 0.79rem;
  line-height: 1.2;
  border: 1px solid rgba(0, 0, 0, 0.26);
  background: rgba(0, 0, 0, 0.045);
  color: #1d1d1d;
}

.detail-source-row {
  margin: 0.1rem 0 0;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

#wikiLink {
  font-size: 0.85rem;
  color: #1c355f;
  text-underline-offset: 0.12em;
}

.chapter-nav {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.timeline-rail {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.6rem;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 0.3rem;
  z-index: 25;
}

.year-pin {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.72rem;
  padding: 0.2rem;
  cursor: pointer;
  position: relative;
  text-align: center;
}

.year-pin::before {
  content: "";
  position: absolute;
  top: -0.5rem;
  left: 50%;
  width: 6px;
  height: 6px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: rgba(232, 228, 213, 0.2);
}

.year-pin.active {
  color: var(--cream);
}

.year-pin.active::before {
  background: var(--cream);
}

.chapter-slide-left {
  animation: chapterSlideLeft 560ms cubic-bezier(0.25, 0.8, 0.25, 1);
}

.chapter-slide-right {
  animation: chapterSlideRight 560ms cubic-bezier(0.25, 0.8, 0.25, 1);
}

@keyframes chapterSlideLeft {
  0% {
    transform: translateX(16%);
    opacity: 0.35;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes chapterSlideRight {
  0% {
    transform: translateX(-16%);
    opacity: 0.35;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes filmReveal {
  0% {
    opacity: 0;
    filter: blur(10px);
    transform: translateY(14px) scale(1.03);
  }

  100% {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 980px) {
  .view-overview {
    grid-template-rows: minmax(0, 60vh) minmax(0, 40vh);
  }

  .chapter-card {
    flex-basis: 68vw;
    min-width: 68vw;
  }

  .view-detail {
    grid-template-columns: 1fr;
    grid-template-rows: 52% 48%;
  }

  .media-content {
    bottom: 1.4rem;
  }

  .info-panel {
    padding-top: 1.2rem;
  }
}

@media (max-width: 680px) {
  .intro-panel {
    padding: 3.7rem 0.95rem 0.85rem;
  }

  .intro-panel h1 {
    max-width: 100%;
  }

  .hero-topline {
    font-size: clamp(1.18rem, 5.8vw, 1.9rem);
    letter-spacing: 0.01em;
  }

  .hero-line-two {
    font-size: clamp(2.8rem, 14vw, 5.2rem);
    line-height: 0.85;
  }

  .intro-panel p {
    max-width: 100%;
    font-size: 1.02rem;
  }

  html[lang="zh-CN"] .intro-panel p {
    max-width: 92%;
  }

  .chapter-card {
    flex-basis: 92vw;
    min-width: 92vw;
    gap: 0.9rem;
    height: 100%;
  }

  .chapter-title {
    font-size: 1.2rem;
    max-width: 96%;
    line-height: 1.16;
  }

  .chapter-card-top {
    gap: 0.4rem;
  }

  .chapter-card-bottom {
    gap: 0.35rem;
  }

  .media-content {
    padding: 0;
    border-left-width: 0;
    left: 0.9rem;
    right: 0.85rem;
    bottom: 1.2rem;
    max-width: min(94%, 560px);
  }

  html[lang="zh-CN"] .media-content h2 {
    margin-bottom: 0.46rem;
    line-height: 1.08;
  }

  html[lang="zh-CN"] .detail-sub {
    font-size: 1rem;
    line-height: 1.42;
  }

  html[lang="en"] .media-content h2 {
    font-size: clamp(2rem, 8.8vw, 4rem);
    line-height: 0.98;
    margin-bottom: 0.52rem;
  }

  html[lang="en"] .detail-sub {
    font-size: 0.98rem;
    line-height: 1.42;
  }

  .timeline-rail {
    gap: 0.08rem;
  }

  .year-pin {
    font-size: 0.6rem;
  }

  .stage-header {
    font-size: 0.62rem;
  }

  .chapter-scroll-hint {
    right: 0.5rem;
    font-size: 0.6rem;
    bottom: 5rem;
  }

  .chapter-info {
    padding: 0.55rem 0.65rem 0.62rem;
  }

  .site-info-text {
    font-size: 0.7rem;
  }

  .chapter-nav {
    gap: 0.45rem;
  }

  .detail-chip {
    font-size: 0.74rem;
  }

  .detail-tag-label {
    font-size: 0.72rem;
  }
}