.page-about {
  --about-idx: 206px;
  --era-bg: #FBF9F4;
  display: block;
  background: var(--rice);
  padding-block-start: clamp(22px, 4vw, 44px);
  overflow-x: hidden;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-crumbs {
  margin-bottom: clamp(16px, 2.6vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
  padding-block-end: clamp(28px, 4.5vw, 54px);
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-hero h1 {
  margin: 12px 0 18px;
}

.page-about .about-hero .display--xl {
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.04;
}

.page-about .about-hero .lede {
  max-width: 35ch;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin-top: clamp(22px, 3vw, 32px);
  padding-top: 18px;
  border-top: var(--line) solid var(--ink);
}

.page-about .about-hero__stats .stat {
  padding-left: 12px;
  border-left: 3px solid var(--clay);
}

.page-about .about-hero__stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--rock);
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media .figure__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--qing);
}

.page-about .about-hero__media .figure__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(34px, 5vw, 66px);
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 双栏：赛季索引 + 里程碑 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 34px);
  padding-block: clamp(34px, 5.5vw, 76px);
}

.page-about .about-body__head {
  padding-bottom: 16px;
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-body__head .section-head__title {
  margin: 10px 0 0;
  max-width: 26ch;
}

.page-about .season-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: grid;
  gap: 3px;
}

.page-about .season-index__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 11px;
  align-items: baseline;
  padding: 9px 11px;
  border-left: 3px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  color: var(--rock);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 120ms linear, background-color 120ms linear, color 120ms linear;
}

.page-about .season-index__item:hover,
.page-about .season-index__item:focus-visible {
  border-left-color: var(--clay);
  background: rgba(127, 182, 196, 0.16);
  color: var(--ink);
}

.page-about .season-index__num {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.page-about .season-index__label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .about-track {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .era {
  background: var(--era-bg);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-soft);
  padding: clamp(18px, 3vw, 28px);
}

.page-about .era__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: var(--line) solid var(--ink);
}

.page-about .era__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--clay);
}

.page-about .era__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .era__text {
  margin: 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    column-gap: clamp(38px, 5vw, 78px);
    row-gap: 30px;
    align-items: start;
  }
  .page-about .about-body__head {
    grid-column: 1 / -1;
  }
  .page-about .about-index {
    grid-column: 1;
    position: sticky;
    top: calc(var(--header-h) + 30px);
  }
  .page-about .about-track {
    grid-column: 2;
  }
  .page-about .season-index__list {
    padding-bottom: 0;
  }
}

@media (max-width: 1023px) {
  .page-about .season-index__list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(148px, 1fr);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    border-bottom: var(--line) solid var(--ink);
  }
}

/* ---------- 能力时间带 ---------- */
.page-about .about-capabilities {
  background: rgba(127, 182, 196, 0.2);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
  padding-block: clamp(28px, 4vw, 46px);
}

.page-about .about-capabilities h2 {
  margin: 0;
  color: var(--qing);
}

.page-about .timeline-band {
  position: relative;
  list-style: none;
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  padding: 0 0 0 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .timeline-band::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 8px;
  background: linear-gradient(180deg, var(--qing) 0%, var(--blue) 40%, var(--shui) 70%, var(--clay) 100%);
  border: var(--line) solid var(--ink);
}

.page-about .timeline-band__node {
  position: relative;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink);
  padding: 6px 0;
}

.page-about .timeline-band__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 18px;
  height: 18px;
  box-sizing: border-box;
  border: var(--line) solid var(--ink);
  border-radius: 50%;
  background: var(--rice);
}

@media (min-width: 760px) {
  .page-about .timeline-band {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 0;
    padding: 0;
  }
  .page-about .timeline-band::before {
    left: 0;
    right: 0;
    top: 22px;
    bottom: auto;
    width: auto;
    height: 8px;
    background: linear-gradient(90deg, var(--qing) 0%, var(--blue) 38%, var(--shui) 66%, var(--clay) 100%);
  }
  .page-about .timeline-band__node {
    padding: 52px 10px 0 0;
    text-align: left;
  }
  .page-about .timeline-band__node::before {
    left: 0;
    top: 18px;
    width: 18px;
    height: 18px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(36px, 5.5vw, 76px);
}

.page-about .about-team__grid {
  margin-top: clamp(22px, 3vw, 34px);
  row-gap: clamp(24px, 3vw, 36px);
}

.page-about .team-bars {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .team-bars__label {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--ink);
}

.page-about .team-bars__num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  fill: var(--ink);
}

.page-about .team-bars__track {
  fill: var(--rice);
  stroke: var(--ink);
  stroke-width: 2;
}

.page-about .team-bars__fill--clay { fill: var(--clay); }
.page-about .team-bars__fill--moss { fill: var(--moss); }
.page-about .team-bars__fill--blue { fill: var(--blue); }

.page-about .team-bars__row { transition: opacity 140ms linear; }

.page-about .team-bars__row:hover .team-bars__num {
  fill: var(--clay);
}

.page-about .about-team__panel .panel__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.34;
}

.page-about .about-team__panel .panel__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 归档流程 ---------- */
.page-about .about-flow {
  padding-block: clamp(30px, 4.6vw, 62px);
}

.page-about .about-flow__grid {
  margin-top: clamp(22px, 3vw, 34px);
  row-gap: clamp(24px, 3vw, 36px);
}

.page-about .about-flow__figure {
  margin: 0;
}

.page-about .about-flow__figure .figure__media {
  aspect-ratio: 14 / 9;
  overflow: hidden;
  background: var(--qing);
}

.page-about .about-flow__figure .figure__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: var(--line) solid var(--ink);
}

.page-about .flow-step {
  position: relative;
  padding: 14px 0 14px clamp(44px, 6vw, 62px);
}

.page-about .flow-step + .flow-step {
  border-top: 1px solid rgba(16, 20, 24, 0.18);
}

.page-about .flow-step__num {
  position: absolute;
  left: clamp(10px, 1.6vw, 16px);
  top: 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: 0.02em;
}

.page-about .flow-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(15px, 1.9vw, 18px);
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-about .flow-step__text {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: clamp(32px, 5vw, 70px);
}

.page-about .about-partners__grid {
  margin-top: clamp(22px, 3vw, 34px);
  row-gap: clamp(22px, 3vw, 30px);
}

.page-about .partner {
  padding-left: 16px;
  border-left: 4px solid var(--shui);
}

.page-about .partner__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.page-about .partner__title {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .partner__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .about-partners__note {
  margin-top: clamp(26px, 3.6vw, 42px);
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(79, 107, 74, 0.1);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-partners__note p {
  margin: 0;
  max-width: 76ch;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-partners__note a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 认可 ---------- */
.page-about .about-awards {
  background: var(--qing);
  color: var(--rice);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
  padding-block: clamp(34px, 5vw, 72px);
}

.page-about .about-awards .section-head__title {
  margin: 0;
  color: var(--rice);
  max-width: 20ch;
}

.page-about .about-awards__note {
  margin: 14px 0 0;
  color: var(--shui);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-awards__grid {
  row-gap: clamp(24px, 3.4vw, 38px);
}

.page-about .award-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .award-list__item {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(244, 241, 234, 0.28);
}

.page-about .award-list__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .award-list__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.34;
  color: var(--rice);
}

.page-about .award-list__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(244, 241, 234, 0.78);
}

.page-about .about-awards .tag--clay {
  border-color: var(--clay);
  color: var(--clay);
}

.page-about .about-awards .tag--moss {
  border-color: var(--acid);
  color: var(--acid);
}

.page-about .about-awards .tag {
  border-color: var(--shui);
  color: var(--shui);
}

/* ---------- 天津运营节奏 ---------- */
.page-about .about-tianjin {
  position: relative;
  isolation: isolate;
  margin-top: clamp(34px, 5vw, 74px);
  background: var(--qing);
  color: var(--rice);
  border-top: var(--line) solid var(--ink);
  overflow: hidden;
}

.page-about .about-tianjin__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .about-tianjin__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: grayscale(0.45) contrast(1.06);
}

.page-about .about-tianjin__inner {
  padding-block: clamp(42px, 6.5vw, 92px);
  max-width: 68ch;
}

.page-about .about-tianjin__eyebrow {
  color: var(--acid);
}

.page-about .about-tianjin h2 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--rice);
  max-width: 22ch;
}

.page-about .about-tianjin__prose p {
  color: rgba(244, 241, 234, 0.86);
  font-size: 16px;
  line-height: 1.82;
  margin: 0 0 14px;
}

.page-about .about-tianjin__prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-tianjin__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-tianjin .btn {
  background: transparent;
  color: var(--rice);
  border: var(--line) solid var(--rice);
}

.page-about .about-tianjin .btn:hover,
.page-about .about-tianjin .btn:focus-visible {
  background: var(--rice);
  color: var(--qing);
}

.page-about .about-tianjin__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--acid);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about .season-index__item {
    transition-duration: 160ms;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-index__item,
  .page-about .team-bars__row {
    transition: none;
  }
}