.page-about {
  --about-gap: clamp(20px, 4vw, 40px);
  --about-hair: rgba(201, 164, 92, 0.42);
  --about-hair-soft: rgba(242, 245, 240, 0.1);
  background: var(--ink);
  color: var(--line);
  padding-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 6vw, 64px) 0 clamp(32px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(255, 75, 43, 0.16) 0%, transparent 58%),
    linear-gradient(148deg, var(--ink) 0%, var(--ink-soft) 52%, var(--night) 100%);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -30%;
  width: 62%;
  height: 90%;
  background: linear-gradient(180deg, rgba(237, 231, 218, 0.08), rgba(237, 231, 218, 0));
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: 1fr;
  z-index: 1;
}
.page-about .about-hero__copy h1 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.16;
  letter-spacing: 0.005em;
  color: var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 20px) 100%, 0 100%);
}
.page-about .about-hero__copy .lead {
  max-width: 34em;
  color: rgba(242, 245, 240, 0.84);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.page-about .about-hero__side {
  border-left: 1px solid var(--about-hair);
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .about-hero__vnote {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.2em;
  font-size: 11px;
  color: var(--ochre);
  max-height: 190px;
}
.page-about .about-hero__side-text {
  color: var(--stone);
  font-size: 14px;
  line-height: 1.8;
  max-width: 28em;
}

/* ---------- 章节通用 ---------- */
.page-about .culture-ch {
  position: relative;
  padding: clamp(34px, 6vw, 76px) 0;
  border-top: 1px solid var(--about-hair-soft);
}
.page-about .culture-ch::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(48px, 12vw, 180px);
  height: 2px;
  background: var(--ochre);
  opacity: 0.75;
}
.page-about .culture-ch__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
.page-about .culture-ch__no {
  font-family: var(--font-score);
  font-weight: 900;
  font-size: clamp(52px, 15vw, 118px);
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(201, 164, 92, 0.65);
  text-decoration: none;
  transition: color 0.24s var(--ease), -webkit-text-stroke-color 0.24s var(--ease);
  display: inline-block;
}
.page-about .culture-ch__no:hover,
.page-about .culture-ch__no:focus-visible {
  color: rgba(255, 75, 43, 0.32);
  -webkit-text-stroke-color: var(--pulse);
}
.page-about .culture-ch__no--block {
  display: block;
  margin-bottom: 10px;
}
.page-about .culture-ch__h2,
.page-about .culture-ch__body h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 4.4vw, 30px);
  line-height: 1.32;
  color: var(--line);
  margin: 0 0 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 14px) 100%, 0 100%);
}
.page-about .culture-ch__body p {
  color: rgba(242, 245, 240, 0.82);
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0 0 14px;
}
.page-about .culture-ch__body p:last-child {
  margin-bottom: 0;
}
.page-about .culture-ch__body strong {
  color: var(--line);
  font-weight: 700;
}
.page-about .culture-ch__caption {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
  line-height: 1.7;
}
.page-about .culture-ch__side {
  display: none;
}
.page-about .culture-ch__vnote {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.2em;
  font-size: 11px;
  color: var(--ochre);
}

/* 图片容器 */
.page-about .media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--night);
  box-shadow: 0 18px 40px rgba(7, 22, 20, 0.5);
}
.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media--slant img {
  aspect-ratio: 3 / 2;
}
.page-about .media--tall img {
  aspect-ratio: 3 / 4;
}
.page-about .media--wide img {
  aspect-ratio: 16 / 9;
}

/* ---------- 折叠说明 ---------- */
.page-about .update-note {
  margin-top: 18px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: rgba(20, 58, 49, 0.6);
  overflow: hidden;
}
.page-about .update-note summary {
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 700;
  font-size: 15px;
  color: var(--line);
  list-style: none;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.page-about .update-note summary::-webkit-details-marker {
  display: none;
}
.page-about .update-note summary::after {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ochre);
  background:
    linear-gradient(var(--ochre), var(--ochre)) center / 10px 1.5px no-repeat,
    linear-gradient(var(--ochre), var(--ochre)) center / 1.5px 10px no-repeat;
  transition: transform 0.22s var(--ease);
  flex: 0 0 auto;
}
.page-about .update-note[open] summary::after {
  transform: rotate(90deg);
  background: linear-gradient(var(--clay), var(--clay)) center / 10px 1.5px no-repeat;
}
.page-about .update-note__body {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--about-hair);
}
.page-about .update-note__body p {
  margin: 12px 0 0;
  color: rgba(242, 245, 240, 0.78);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 三步订阅 ---------- */
.page-about .culture-ch--steps {
  background: linear-gradient(180deg, rgba(20, 58, 49, 0.55), rgba(7, 22, 20, 0.35));
}
.page-about .steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: step;
}
.page-about .steps__item {
  position: relative;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair-soft);
  background: rgba(7, 22, 20, 0.5);
  padding: 18px 18px 20px 20px;
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), border-color 0.24s var(--ease);
}
.page-about .steps__item::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: -14px;
  width: 1px;
  height: 14px;
  background: var(--clay);
}
.page-about .steps__item:last-child::after {
  display: none;
}
.page-about .steps__item:hover {
  transform: translateY(-4px);
  border-color: var(--about-hair);
  box-shadow: 0 16px 34px rgba(7, 22, 20, 0.55);
}
.page-about .steps__no {
  display: inline-block;
  font-family: var(--font-score);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--pulse);
  border: 1px solid rgba(255, 75, 43, 0.45);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  margin-bottom: 10px;
}
.page-about .steps__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--line);
}
.page-about .steps__item p {
  margin: 0;
  color: rgba(242, 245, 240, 0.78);
  font-size: 15px;
  line-height: 1.82;
}
.page-about .steps__foot {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--ochre);
  color: rgba(242, 245, 240, 0.84);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  list-style: none;
  margin: 16px 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .crew__item {
  border-left: 2px solid var(--moss);
  padding: 2px 0 2px 16px;
}
.page-about .crew__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--line);
}
.page-about .crew__item p {
  margin: 0;
  color: rgba(242, 245, 240, 0.76);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 时间轴 ---------- */
.page-about .culture-ch--timeline {
  padding-bottom: clamp(30px, 5vw, 60px);
}
.page-about .timeline-banner {
  margin: clamp(18px, 3vw, 28px) 0 0;
}
.page-about .timeline {
  margin-top: clamp(20px, 3vw, 32px);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--ochre) rgba(242, 245, 240, 0.08);
  padding-bottom: 14px;
}
.page-about .timeline::-webkit-scrollbar {
  height: 6px;
}
.page-about .timeline::-webkit-scrollbar-track {
  background: rgba(242, 245, 240, 0.08);
  border-radius: var(--radius-pill);
}
.page-about .timeline::-webkit-scrollbar-thumb {
  background: var(--ochre);
  border-radius: var(--radius-pill);
}
.page-about .timeline__track {
  list-style: none;
  margin: 0;
  padding: 0 clamp(20px, 5vw, 60px);
  display: flex;
  gap: 16px;
  width: max-content;
}
.page-about .timeline__node {
  position: relative;
  scroll-snap-align: start;
  flex: 0 0 auto;
  width: min(74vw, 288px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hair-soft);
  background: linear-gradient(160deg, rgba(20, 58, 49, 0.85), rgba(7, 22, 20, 0.75));
  padding: 22px 20px 24px;
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease), box-shadow 0.26s var(--ease);
}
.page-about .timeline__node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--ochre), rgba(201, 164, 92, 0));
}
.page-about .timeline__node:hover {
  transform: translateY(-4px);
  border-color: var(--about-hair);
  box-shadow: 0 18px 38px rgba(7, 22, 20, 0.6);
}
.page-about .timeline__year {
  display: block;
  font-family: var(--font-score);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ochre);
  margin-bottom: 12px;
}
.page-about .timeline__node h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--line);
}
.page-about .timeline__node p {
  margin: 0;
  color: rgba(242, 245, 240, 0.76);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 数据事实表 ---------- */
.page-about .facts {
  margin: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: rgba(7, 22, 20, 0.55);
  overflow: hidden;
}
.page-about .facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px dashed var(--about-hair-soft);
}
.page-about .facts__row:last-child {
  border-bottom: 0;
}
.page-about .facts__row dt {
  color: var(--stone);
  font-size: 13.5px;
}
.page-about .facts__row dd {
  margin: 0;
  font-family: var(--font-score);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--line);
}
.page-about .facts__row .num {
  color: var(--pulse);
  font-size: 21px;
  margin-right: 2px;
}

/* ---------- 覆盖范围 ---------- */
.page-about .culture-ch--reach {
  background: linear-gradient(180deg, rgba(7, 22, 20, 0.4), rgba(20, 58, 49, 0.35));
}
.page-about .reach {
  margin: 20px 0 0;
  gap: 14px;
}
.page-about .reach__card {
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair-soft);
  background: rgba(7, 22, 20, 0.5);
  padding: 18px;
}
.page-about .reach__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  color: var(--ochre);
}
.page-about .reach__card p {
  margin: 0;
  color: rgba(242, 245, 240, 0.76);
  font-size: 14.5px;
  line-height: 1.8;
}
.page-about .honors {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .honors li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: rgba(242, 245, 240, 0.86);
  line-height: 1.7;
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--about-hair);
  padding: clamp(32px, 6vw, 64px) 0 clamp(40px, 7vw, 76px);
  background: var(--night);
}
.page-about .about-next h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 4.4vw, 28px);
  color: var(--line);
}
.page-about .about-next p {
  margin: 0 0 22px;
  max-width: 40em;
  color: rgba(242, 245, 240, 0.78);
  font-size: 15.5px;
  line-height: 1.85;
}
.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 640px 起 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 190px;
    align-items: start;
  }
  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .steps__item::after {
    left: 20px;
  }
  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 22px;
  }
  .page-about .honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 900px 起：展览墙排版 ---------- */
@media (min-width: 900px) {
  .page-about .culture-ch__inner {
    grid-template-columns: 128px minmax(0, 520px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }
  .page-about .culture-ch__body--wide {
    grid-column: 2 / 4;
  }
  .page-about .culture-ch__side {
    display: block;
    grid-column: 3 / 4;
    justify-self: end;
  }
  .page-about .culture-ch--flip .culture-ch__inner {
    grid-template-columns: 128px minmax(0, 1fr) minmax(0, 520px);
  }
  .page-about .culture-ch--flip .culture-ch__media {
    grid-column: 2 / 3;
  }
  .page-about .culture-ch--flip .culture-ch__body {
    grid-column: 3 / 4;
  }
  .page-about .culture-ch__media--facts {
    align-self: center;
  }
  .page-about .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .steps__item::after {
    left: 20px;
    bottom: auto;
    top: 44px;
    left: auto;
    right: -18px;
    width: 18px;
    height: 1px;
  }
  .page-about .timeline__track {
    padding-left: clamp(40px, 7vw, 96px);
    padding-right: clamp(40px, 7vw, 96px);
    gap: 20px;
  }
  .page-about .timeline__node {
    width: 300px;
  }
  .page-about .reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .steps__item,
  .page-about .timeline__node,
  .page-about .culture-ch__no {
    transition: none;
  }
  .page-about .steps__item:hover,
  .page-about .timeline__node:hover {
    transform: none;
  }
}