/* ====================================================================
   about.html v2 — 时间叙事主题 (Heritage)
   依赖: tokens.css / ct.css / index.css 中的 .ct-skyline-band
   ==================================================================== */

/* ==================== Hero · 团队照背景 + 大年份 ==================== */
.ct-about-hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  padding-top: var(--ct-header-h);
  padding-bottom: var(--ct-space-9);
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(
      90deg,
      rgba(11, 16, 32, 0.92) 0%,
      rgba(11, 16, 32, 0.75) 45%,
      rgba(11, 16, 32, 0.45) 100%),
    linear-gradient(
      180deg,
      rgba(11, 16, 32, 0.45) 0%,
      transparent 18%,
      rgba(11, 16, 32, 0.55) 65%,
      var(--ct-bg) 92%),
    url('../images/about-hero.jpg') center / cover no-repeat,
    var(--ct-bg);
}

/* 大年份 backdrop — 浮在背景的 outline 数字 */
.ct-year-mark {
  position: absolute;
  top: 50%;
  right: 4%;
  transform: translateY(-50%);
  z-index: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  pointer-events: none;
  font-family: var(--ct-font-mono);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: rgba(232, 184, 114, 0.35);
  text-transform: uppercase;
}
.ct-year-mark__num {
  font-family: var(--ct-font-display);
  font-size: clamp(120px, 18vw, 280px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  -webkit-text-stroke: 1px rgba(232, 184, 114, 0.32);
  color: transparent;
  font-variation-settings: 'opsz' 144, 'SOFT' 80;
}
@media (max-width: 991px) {
  .ct-year-mark { right: 50%; transform: translate(50%, -50%); opacity: 0.4; }
}

.ct-about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-5);
}
.ct-about-hero__title { margin: 0; }
.ct-about-hero__lead { font-size: var(--ct-fs-body-lg); max-width: 56ch; }

/* ==================== Story · Magazine 多栏 (大 pull quote) ==================== */
.ct-about-story {
  padding: var(--ct-section-py) 0;
}
.ct-magazine {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--ct-space-9);
  align-items: start;
}

/* 左大引文 */
.ct-magazine__quote {
  position: sticky;
  top: calc(var(--ct-header-h) + var(--ct-space-7));
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-4);
  padding-left: var(--ct-space-7);
  border-left: 2px solid var(--ct-border-gold);
}
.ct-magazine__mark {
  font-family: var(--ct-font-display);
  font-size: clamp(80px, 12vw, 140px);
  font-weight: 700;
  color: var(--ct-gold);
  line-height: 0.7;
  letter-spacing: -0.04em;
  margin-left: -16px;
  margin-top: -24px;
  font-variation-settings: 'opsz' 144;
  opacity: 0.95;
}
.ct-magazine__quote-text {
  font-family: var(--ct-font-display);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 500;
  line-height: 1.3;
  color: var(--ct-text);
  margin: 0;
  letter-spacing: -0.01em;
}
.ct-magazine__quote-text em {
  font-style: normal;
  color: var(--ct-gold);
  font-weight: 700;
}
.ct-magazine__sig {
  font-family: var(--ct-font-mono);
  font-size: var(--ct-fs-xs);
  letter-spacing: 0.16em;
  color: var(--ct-text-mute);
  text-transform: uppercase;
}

/* 右侧: 媒体 + 副本 */
.ct-magazine__aside {
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-7);
}
.ct-magazine__media {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--ct-radius-xl);
  overflow: hidden;
  background: var(--ct-bg-elev);
}
.ct-magazine__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.6s var(--ct-ease-out);
}
.ct-magazine__media:hover img { transform: scale(1.04); }
.ct-magazine__media-decor {
  position: absolute;
  width: 200px;
  height: 200px;
  bottom: -60px;
  right: -60px;
  border-radius: 50%;
  background: var(--ct-gold-glow);
  filter: blur(60px);
  pointer-events: none;
  z-index: 1;
}
.ct-magazine__copy {
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-3);
}
.ct-magazine__heading { margin: 0; }
.ct-display--h3 { font-size: var(--ct-fs-h3); }
.ct-magazine__copy .ct-text { max-width: 56ch; }
.ct-magazine__copy .ct-btn { align-self: flex-start; margin-top: var(--ct-space-3); }

@media (max-width: 991px) {
  .ct-magazine { grid-template-columns: 1fr; gap: var(--ct-space-7); }
  .ct-magazine__quote { position: static; padding-left: var(--ct-space-5); }
  .ct-magazine__media { aspect-ratio: 16 / 10; }
}

/* ==================== About Band (skyline-band 包裹三段) ==================== */
.ct-about-band {
  position: relative;
}
/* 让 about band 内部三段共用景深, 不显示各自顶部光带 */
.ct-about-band > .ct-section { background: transparent; }

/* ==================== MVV (横向三联屏 hover 展开) ==================== */
.ct-about-mvv {
  padding: var(--ct-section-py-sm) 0 var(--ct-space-7);
}
.ct-trio {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--ct-space-3);
  height: 380px;
  border-radius: var(--ct-radius-xl);
  overflow: hidden;
  border: 1px solid var(--ct-border);
  background: var(--ct-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.ct-trio__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--ct-space-4);
  padding: var(--ct-space-7);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(232, 184, 114, 0.06) 0%, transparent 55%),
    rgba(7, 11, 22, 0.45);
  cursor: pointer;
  overflow: hidden;
  transition: flex 0.7s var(--ct-ease-out), background 0.7s var(--ct-ease-out);
  flex: 1;
  border-right: 1px solid var(--ct-border);
}

/* 3D 立体字母装饰 (CITYTRUST 9 字均分 3 panel, JS 注入, 错乱摆放) */
.ct-trio__cubes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.ct-cube {
  position: absolute;
  display: inline-block;
  font-family: var(--ct-font-display);
  font-weight: 900;
  font-size: 150px;
  line-height: 0.85;
  letter-spacing: -0.04em;
  /* Fraunces 可变字体: SOFT 100 让字角圆润, opsz 144 显示尺寸 */
  font-variation-settings: 'opsz' 144, 'SOFT' 100, 'wght' 900;
  user-select: none;
  white-space: nowrap;
  transform-origin: 50% 50%;
  opacity: 0;
  animation: ct-cube-float 1s var(--ct-ease-out) forwards;
}
/* 主层: 实色暗金棕 + 多层同色 text-shadow → 3D 厚度块 (侧面光滑) */
.ct-cube__body {
  display: block;
  color: #3a2f1c;
  text-shadow:
    1px 1px 0 #3a2f1c,
    2px 2px 0 #3a2f1c,
    3px 3px 0 #3a2f1c,
    4px 4px 0 #3a2f1c,
    5px 5px 0 #3a2f1c,
    6px 6px 0 #3a2f1c,
    7px 7px 0 #3a2f1c,
    8px 8px 0 #2c2310;
}
/* 顶面: 金属高光 — 大部分透明 (透出 body 暗金), 仅一道光带扫过形成反光感 */
.ct-cube__face {
  position: absolute;
  inset: 0;
  display: block;
  background: linear-gradient(
    100deg,
    transparent 0%,
    transparent 35%,
    rgba(232, 184, 114, 0.45) 45%,
    rgba(255, 245, 210, 0.85) 50%,
    rgba(232, 184, 114, 0.45) 55%,
    transparent 65%,
    transparent 100%
  );
  background-size: 300% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  pointer-events: none;
  animation: ct-cube-shine 9s linear infinite 1s;
}
@keyframes ct-cube-float {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes ct-cube-shine {
  0%   { background-position: 200% 0%; }
  100% { background-position: -100% 0%; }
}

@media (max-width: 991px) {
  .ct-cube { font-size: 100px; }
}
.ct-trio__panel:last-child { border-right: none; }
.ct-trio__panel:hover {
  flex: 2.5;
  background: rgba(11, 16, 32, 0.6);
}
.ct-trio__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--ct-radius-md);
  background: var(--ct-gold-soft);
  border: 1px solid var(--ct-border-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ct-gold);
  font-size: 22px;
  position: relative;
  z-index: 1;
  transition: all var(--ct-dur) var(--ct-ease-out);
}
.ct-trio__panel:hover .ct-trio__icon {
  background: var(--ct-gold);
  color: var(--ct-text-on-gold);
  transform: scale(1.05);
}
.ct-trio__head {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ct-trio__label {
  font-family: var(--ct-font-mono);
  font-size: var(--ct-fs-xs);
  letter-spacing: 0.18em;
  color: var(--ct-gold);
  text-transform: uppercase;
}
.ct-trio__title {
  font-family: var(--ct-font-display);
  font-size: var(--ct-fs-h3);
  font-weight: 600;
  color: var(--ct-text);
  margin: 0;
  letter-spacing: -0.01em;
}
.ct-trio__desc {
  position: relative;
  z-index: 1;
  font-size: var(--ct-fs-body);
  color: var(--ct-text-soft);
  line-height: 1.65;
  margin: 0;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.4s var(--ct-ease-out) 0.15s, max-height 0.6s var(--ct-ease-out);
}
.ct-trio__panel:hover .ct-trio__desc {
  opacity: 1;
  max-height: 200px;
}

@media (max-width: 991px) {
  .ct-trio {
    grid-template-columns: 1fr;
    height: auto;
  }
  .ct-trio__panel {
    border-right: none;
    border-bottom: 1px solid var(--ct-border);
    flex: 1 !important;
    padding: var(--ct-space-5);
  }
  .ct-trio__panel:last-child { border-bottom: none; }
  .ct-trio__desc { opacity: 1; max-height: none; }
}

/* ==================== Stats (带进度条填充) ==================== */
.ct-about-stats {
  padding: var(--ct-space-7) 0;
}
.ct-progress-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--ct-space-7);
}
.ct-progress-stat {
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-3);
}
.ct-progress-stat__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--ct-space-3);
}
.ct-progress-stat__num {
  font-family: var(--ct-font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  color: var(--ct-text);
  line-height: 1;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: baseline;
}
.ct-progress-stat__num em {
  font-style: normal;
  font-size: 0.45em;
  color: var(--ct-gold);
  font-weight: 500;
  margin: 0 3px;
}
.ct-progress-stat__pct {
  font-family: var(--ct-font-mono);
  font-size: var(--ct-fs-xs);
  letter-spacing: 0.12em;
  color: var(--ct-text-mute);
  text-transform: uppercase;
}
.ct-progress-stat__bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--ct-radius-pill);
  overflow: hidden;
}
.ct-progress-stat__bar span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--ct-gold), var(--ct-gold-light));
  border-radius: inherit;
  transition: width 1.6s var(--ct-ease-out);
  box-shadow: 0 0 12px var(--ct-gold-glow-strong);
}
.ct-progress-stat.is-revealed .ct-progress-stat__bar span,
.ct-progress-stat[data-progress] .ct-progress-stat__bar span {
  /* JS 设置 width via inline style based on data-progress */
}
.ct-progress-stat__label {
  font-size: var(--ct-fs-sm);
  color: var(--ct-text-soft);
  letter-spacing: 0.04em;
}
@media (max-width: 720px) {
  .ct-progress-stats { grid-template-columns: 1fr 1fr; gap: var(--ct-space-5); }
}

/* ==================== Timeline (横向 scroll-snap, 拖动) ==================== */
.ct-about-timeline-sec {
  padding-top: clamp(120px, 16vw, 220px);
  padding-bottom: var(--ct-section-py);
}
.ct-section__header--row {
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  text-align: left;
  max-width: 100%;
}
.ct-section__header--row > div { display: flex; flex-direction: column; gap: var(--ct-space-3); }
.ct-timeline-h__hint {
  display: inline-flex;
  align-items: center;
  gap: var(--ct-space-2);
  font-family: var(--ct-font-mono);
  font-size: var(--ct-fs-xs);
  letter-spacing: 0.12em;
  color: var(--ct-text-mute);
  text-transform: uppercase;
}
.ct-timeline-h__hint i { color: var(--ct-gold); }

.ct-timeline-h {
  position: relative;
  margin-top: var(--ct-space-7);
  padding: var(--ct-space-7) 0 var(--ct-space-6);
  overflow: hidden;
  /* 两侧渐隐 mask, 让首末节点淡入淡出 */
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
}
/* 横线: 每个节点画一段, 长度覆盖到下一节点 dot 中心. spacer 处不画 → 循环点自然断开 */
.ct-timeline-h__track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--ct-space-7);
  position: relative;
  z-index: 1;
  width: max-content;  /* 内容自然宽度撑开, 才能 translateX 滚动 */
}
.ct-timeline-h__track.is-marquee {
  animation: ct-timeline-marquee 80s linear infinite;
}
.ct-timeline-h:hover .ct-timeline-h__track.is-marquee {
  animation-play-state: paused;
}
@keyframes ct-timeline-marquee {
  0%   { transform: translateX(0); }
  /* 一组 = 原序列 + 1 个 gap = (track 总宽 - 1gap) / 2 + 1gap = 50% + half gap. */
  /* 不补 half gap 会让循环点错位 ~24px, 视觉上每周期闪一下 */
  100% { transform: translateX(calc(-50% - var(--ct-space-7) / 2)); }
}
.ct-timeline-h__node {
  flex: 0 0 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--ct-space-4);
  position: relative;
}
/* 节点内的横线段: dot 中心高度, 向左右各延伸半个 gap, 与邻居节点的线段无缝拼接 */
.ct-timeline-h__node::before {
  content: '';
  position: absolute;
  top: 61px;  /* year 38 + gap 16 + dot 半径 7 */
  left: calc(var(--ct-space-7) / -2);
  right: calc(var(--ct-space-7) / -2);
  height: 1px;
  background: var(--ct-border-gold);
  z-index: 0;
}
/* 起点 |: 每段线开头(原 N1 + 紧随 spacer 后的克隆 N1) */
.ct-timeline-h__track > .ct-timeline-h__node:first-child::after,
.ct-timeline-h__spacer + .ct-timeline-h__node::after {
  content: '';
  position: absolute;
  top: 55px;
  left: calc(var(--ct-space-7) / -2);
  width: 2px;
  height: 13px;
  background: var(--ct-gold);
  border-radius: 1px;
  z-index: 1;
}
/* 终点 >: 每段线结尾(spacer 前的最后一节点) — 用 border 三角实现 */
.ct-timeline-h__node:has(+ .ct-timeline-h__spacer)::after {
  content: '';
  position: absolute;
  top: 56px;
  right: calc(var(--ct-space-7) / -2 - 1px);
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid var(--ct-gold);
  background: transparent;
  z-index: 1;
}
/* 循环衔接处的间距占位 (无线段, 自然断开) */
.ct-timeline-h__spacer {
  flex: 0 0 240px;
  list-style: none;
}
.ct-timeline-h__year {
  font-family: var(--ct-font-display);
  font-size: 38px;
  font-weight: 700;
  color: var(--ct-gold);
  letter-spacing: -0.03em;
  line-height: 1;
  font-variation-settings: 'opsz' 144;
}
.ct-timeline-h__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ct-gold);
  box-shadow: 0 0 0 4px var(--ct-bg), 0 0 16px var(--ct-gold-glow-strong);
  position: relative;
  z-index: 2;
}
.ct-timeline-h__node--current .ct-timeline-h__dot {
  background: var(--ct-gold-light);
  animation: ct-tl-pulse 2s ease-in-out infinite;
}
@keyframes ct-tl-pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--ct-bg), 0 0 16px var(--ct-gold-glow-strong); }
  50%      { box-shadow: 0 0 0 4px var(--ct-bg), 0 0 32px var(--ct-gold-glow-strong); }
}
.ct-timeline-h__card {
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-lg);
  padding: var(--ct-space-5);
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-2);
  transition: border-color var(--ct-dur) var(--ct-ease-out), background var(--ct-dur) var(--ct-ease-out);
}
.ct-timeline-h__card:hover {
  border-color: var(--ct-border-gold);
  background: var(--ct-surface-hover);
}
.ct-timeline-h__card--current {
  border-color: var(--ct-border-gold);
  background: rgba(201, 160, 92, 0.06);
}
.ct-timeline-h__card h4 {
  font-family: var(--ct-font-display);
  font-size: var(--ct-fs-h4);
  font-weight: 600;
  color: var(--ct-text);
  margin: 0;
  letter-spacing: -0.01em;
}
.ct-timeline-h__card p {
  font-size: var(--ct-fs-sm);
  color: var(--ct-text-soft);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 720px) {
  .ct-section__header--row { flex-direction: column; align-items: flex-start; gap: var(--ct-space-4); }
  .ct-timeline-h__node { flex: 0 0 280px; }
}

/* ==================== Final CTA · 印章下落 ==================== */
.ct-about-cta {
  position: relative;
  text-align: center;
  background: var(--ct-bg-deep);
  padding: var(--ct-section-py) 0;
  overflow: hidden;
  isolation: isolate;
}
.ct-about-cta__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--ct-space-5);
}
.ct-about-cta__title { margin: 0; }
.ct-about-cta__lead { text-align: center; margin: 0 auto; max-width: 640px; }

/* 印章下落 — 按钮 hover 时印章 stamp 下落 */
.ct-stamp-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.ct-stamp {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%) translateY(-40px) scale(0.6);
  width: 84px;
  height: 84px;
  pointer-events: none;
  opacity: 0;
  filter: drop-shadow(0 0 24px var(--ct-gold-glow-strong));
  transition:
    opacity 0.3s var(--ct-ease-out),
    transform 0.5s var(--ct-ease-spring);
}
.ct-stamp svg { width: 100%; height: 100%; }
.ct-stamp-cta:hover .ct-stamp {
  opacity: 0.95;
  transform: translateX(-50%) translateY(0) scale(1) rotate(-12deg);
}
@media (max-width: 640px) {
  .ct-about-cta { padding: var(--ct-space-9) 0; }
}