/* ===== 品牌历程页 page-about ===== */
.page-about {
  --about-line: rgba(127, 212, 240, 0.30);
  --about-hair: rgba(22, 50, 79, 0.85);
  background: var(--night);
  color: var(--cream);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: 110px;
  overflow-wrap: break-word;
}

.page-about .crumb {
  padding-top: 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}
.page-about .crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.page-about .crumb a:hover,
.page-about .crumb a:focus-visible { color: var(--orange); }
.page-about .crumb__sep {
  margin: 0 8px;
  color: var(--stroke);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding: 42px 0 0;
}
.page-about .about-hero__lead { min-width: 0; }

.page-about .exhibit-label {
  margin: 0;
  padding-left: 14px;
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.page-about .exhibit-label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 2px;
  height: 1em;
  background: var(--orange);
}

.page-about .about-hero h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 58px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: 0.005em;
  color: var(--cream);
  max-width: 16em;
}

.page-about .lede {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  min-width: 0;
}

.page-about .about-stat {
  padding: 20px 22px 22px;
  background: linear-gradient(165deg, rgba(94, 27, 46, 0.9), rgba(10, 26, 47, 0.92));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.page-about .about-stat--cool {
  background: linear-gradient(165deg, rgba(14, 59, 62, 0.92), rgba(10, 26, 47, 0.92));
  clip-path: polygon(0 18px, 18px 0, 100% 0, 100% 100%, 0 100%);
}
.page-about .about-stat__num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(42px, 8vw, 66px);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.01em;
  color: var(--orange);
}
.page-about .about-stat--cool .about-stat__num { color: var(--ice); }
.page-about .about-stat__unit {
  margin-left: 6px;
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--mist);
}
.page-about .about-stat__label {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 全宽主视觉 ---------- */
.page-about .about-wide {
  position: relative;
  box-sizing: border-box;
  max-width: var(--shell-w);
  margin: 52px auto 0;
  padding: 0 var(--gutter);
}
.page-about .about-wide img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.92);
}
.page-about .about-wide::after {
  content: "";
  position: absolute;
  inset: 0 var(--gutter);
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(127, 212, 240, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(127, 212, 240, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
}

/* ---------- 左侧索引 + 右侧内容 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 58px;
}

.page-about .about-rail__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--about-line);
}
.page-about .about-rail__list li { position: relative; }
.page-about .about-rail__list li::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 18px;
  width: 6px;
  height: 6px;
  background: var(--stroke);
  transform: rotate(45deg);
  transition: background 0.3s var(--ease);
}
.page-about .about-rail__list li:hover::before,
.page-about .about-rail__list li:focus-within::before { background: var(--yellow); }

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0 11px 18px;
  font-size: 13.5px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible { color: var(--cream); }
.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ice);
  opacity: 0.7;
}

/* ---------- 通用小节 ---------- */
.page-about .about-flow { min-width: 0; }

.page-about .about-sec {
  padding-bottom: 50px;
  margin-bottom: 50px;
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-sec:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-sec h2 {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.6vw, 38px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--cream);
  max-width: 20em;
}

.page-about .prose {
  max-width: 620px;
  margin: 0 0 26px;
}
.page-about .prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--cream);
}
.page-about .prose p:last-child { margin-bottom: 0; }

/* ---------- 标签条 ---------- */
.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-chips li {
  padding: 8px 16px 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ice);
  background: rgba(36, 28, 76, 0.6);
  border: 1px solid var(--stroke);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}

/* ---------- 两层读法切换 ---------- */
.page-about .about-switch {
  position: relative;
  margin: 30px 0 0;
}
.page-about .about-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.page-about .about-switch__tabs {
  display: inline-flex;
  padding: 4px;
  background: var(--night-2);
  border: 1px solid var(--stroke);
}
.page-about .about-switch__input:focus-visible ~ .about-switch__tabs {
  box-shadow: 0 0 0 2px var(--ice);
}
.page-about .about-switch__tab {
  padding: 9px 20px 10px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--mist);
  cursor: pointer;
  user-select: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about .about-switch__tab:hover { color: var(--cream); }
.page-about #about-view-full:checked ~ .about-switch__tabs [for="about-view-full"],
.page-about #about-view-half:checked ~ .about-switch__tabs [for="about-view-half"] {
  background: var(--orange);
  color: var(--night);
}

.page-about .about-panel {
  gap: 16px;
  margin-top: 22px;
  grid-template-columns: minmax(0, 1fr);
}
.page-about .about-panel--full,
.page-about .about-panel--half { display: none; }
.page-about #about-view-full:checked ~ .about-panel--full { display: grid; }
.page-about #about-view-half:checked ~ .about-panel--half { display: grid; }

.page-about .about-side {
  padding: 22px 22px 26px;
  background: var(--night-2);
}
.page-about .about-side--home {
  background: linear-gradient(160deg, rgba(47, 191, 113, 0.18), rgba(13, 33, 56, 0.95) 64%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.page-about .about-side--away {
  background: linear-gradient(200deg, rgba(127, 212, 240, 0.18), rgba(13, 33, 56, 0.95) 64%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}
.page-about .about-side h3 {
  margin: 0 0 14px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.page-about .about-side--home h3 { color: var(--grass); }
.page-about .about-side--away h3 { color: var(--ice); }
.page-about .about-side ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-side li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--mist);
  border-top: 1px solid var(--about-hair);
}
.page-about .about-side li:first-child { border-top: 0; }

.page-about .about-half {
  padding: 20px 22px 24px;
  background: var(--teal);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.page-about .about-half h3 {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--yellow);
}
.page-about .about-half__pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-about .about-half__home,
.page-about .about-half__away {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--about-hair);
  background: rgba(10, 26, 47, 0.5);
}
.page-about .about-half__home { color: var(--grass); }
.page-about .about-half__away { color: var(--ice); }

.page-about .about-midimg { margin: 30px 0 0; }
.page-about .about-midimg img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 620;
  object-fit: cover;
  opacity: 0.5;
  filter: saturate(0.85);
}

/* ---------- 三条线路 ---------- */
.page-about .about-tracks {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.page-about .about-track {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 24px;
  background: var(--night-2);
  border-top: 2px solid var(--stroke);
}
.page-about .about-track:nth-child(1) { border-top-color: var(--orange); }
.page-about .about-track:nth-child(2) { border-top-color: var(--ice); }
.page-about .about-track:nth-child(3) { border-top-color: var(--grass); }
.page-about .about-track__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}
.page-about .about-track h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  color: var(--cream);
}
.page-about .about-track p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}
.page-about .about-track__meta {
  margin-top: auto;
  margin-bottom: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--yellow);
}

/* ---------- 编辑台节奏 ---------- */
.page-about .about-clock {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.page-about .about-clock__item { padding-right: 20px; }
.page-about .about-clock__mark {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
}
.page-about .about-clock__item--next .about-clock__mark { color: var(--ice); }
.page-about .about-clock__item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 700;
  color: var(--cream);
}
.page-about .about-clock__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 年份时间线 ---------- */
.page-about .about-years {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}
.page-about .about-year {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 24px 0 26px 20px;
  border-top: 1px solid var(--about-hair);
}
.page-about .about-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 36px;
  width: 8px;
  height: 8px;
  background: var(--stroke);
  transform: rotate(45deg);
}
.page-about .about-year--now::before { background: var(--yellow); }
.page-about .about-year__num {
  font-family: var(--font-display);
  font-size: clamp(40px, 9vw, 66px);
  font-weight: 600;
  line-height: 0.85;
  letter-spacing: 0.01em;
  color: rgba(127, 212, 240, 0.18);
}
.page-about .about-year--now .about-year__num { color: var(--orange); }
.page-about .about-year__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-ui);
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}
.page-about .about-year__body p {
  margin: 0;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}
.page-about .about-team__body { min-width: 0; }
.page-about .about-team__fig { margin: 0; }
.page-about .about-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}
.page-about .about-team__nums {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 24px 0 20px;
  padding: 0;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}
.page-about .about-team__nums li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 18px;
  background: var(--night);
}
.page-about .about-team__n {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--yellow);
}
.page-about .about-team__t {
  font-size: 13px;
  color: var(--mist);
}
.page-about .about-note {
  margin: 0;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  border-left: 2px solid var(--stroke);
}

/* ---------- 档案 ---------- */
.page-about .about-archive {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 6px 0 26px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}
.page-about .about-archive__left,
.page-about .about-archive__right {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 24px 28px;
  background: var(--night-2);
}
.page-about .about-archive__right { background: var(--indigo); }
.page-about .about-archive__num {
  font-family: var(--font-display);
  font-size: clamp(44px, 9vw, 66px);
  font-weight: 600;
  line-height: 0.9;
  color: var(--cream);
}
.page-about .about-archive__right .about-archive__num { color: var(--orange); }
.page-about .about-archive__unit {
  margin-left: 4px;
  font-family: var(--font-ui);
  font-size: 0.38em;
  color: var(--mist);
}
.page-about .about-archive__cap {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 520px) {
  .page-about .about-half__pair { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 680px) {
  .page-about .about-panel--full { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .about-panel--half { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 760px) {
  .page-about .about-tracks { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .about-clock { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
  .page-about .about-clock__item {
    padding-right: 26px;
    border-left: 1px solid var(--about-line);
    padding-left: 22px;
  }
  .page-about .about-archive { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 820px) {
  .page-about .about-year {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    column-gap: 40px;
    padding: 30px 0 32px 28px;
  }
  .page-about .about-year__body { grid-column: 1; grid-row: 1; }
  .page-about .about-year__num { grid-column: 2; grid-row: 1; }
}

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    column-gap: 44px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: 56px;
    align-items: end;
    padding-top: 62px;
  }
  .page-about .lede { font-size: 18px; }
  .page-about .about-hero__stats {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .page-about .about-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: 64px;
    margin-top: 84px;
  }
  .page-about .about-rail {
    position: sticky;
    top: 100px;
    align-self: start;
  }
}

@media (max-width: 899px) {
  .page-about .about-rail {
    overflow-x: auto;
    padding-bottom: 6px;
  }
  .page-about .about-rail__list {
    display: flex;
    gap: 2px;
    border-left: 0;
    border-bottom: 1px solid var(--about-line);
  }
  .page-about .about-rail__list li { flex: 0 0 auto; }
  .page-about .about-rail__list li::before { display: none; }
  .page-about .about-rail__list a {
    white-space: nowrap;
    padding: 9px 14px;
    border-bottom: 2px solid transparent;
  }
  .page-about .about-rail__list a:hover { border-bottom-color: var(--orange); }
}

@media (max-width: 479px) {
  .page-about .about-hero__stats { grid-template-columns: minmax(0, 1fr); }
  .page-about .about-team__nums { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__list li::before,
  .page-about .about-switch__tab,
  .page-about .crumb a { transition: none; }
}