.page-about {
  --about-line: rgba(30, 122, 68, 0.42);
  --about-hair: rgba(199, 203, 197, 0.85);
  --about-ink-soft: rgba(11, 42, 32, 0.82);
  --about-ink-faint: rgba(11, 42, 32, 0.62);
  background: var(--chalk-white);
  color: var(--ink-green);
  overflow-x: clip;
}

.page-about a {
  color: var(--tactic-blue);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  background: var(--ink-green);
  color: var(--chalk-white);
  padding: clamp(56px, 10vw, 104px) 0 clamp(40px, 6vw, 68px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--mist-gradient);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(199, 203, 197, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 203, 197, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-about .hero-stack {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.page-about .about-hero .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero .breadcrumb li {
  color: rgba(247, 248, 244, 0.48);
}

.page-about .about-hero .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(247, 248, 244, 0.32);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(247, 248, 244, 0.78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--whistle-yellow);
  border-bottom-color: var(--whistle-yellow);
}

.page-about .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-label);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--whistle-yellow);
}

.page-about .hero-eyebrow::before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--whistle-yellow);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  max-width: 21ch;
  font-family: var(--font-heading);
  font-size: clamp(31px, 6vw, 60px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--chalk-white);
}

.page-about .hero-lede {
  margin: 0 0 clamp(28px, 5vw, 46px);
  max-width: 64ch;
  font-size: clamp(15.5px, 1.9vw, 18px);
  line-height: 1.88;
  color: rgba(247, 248, 244, 0.8);
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(199, 203, 197, 0.24);
  border: 1px solid rgba(199, 203, 197, 0.24);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .hero-stats .statboard__row {
  background: rgba(11, 42, 32, 0.7);
  padding: 16px 16px 15px;
  min-width: 0;
}

.page-about .hero-stats .statboard__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--whistle-yellow);
}

.page-about .hero-stats .statboard__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(247, 248, 244, 0.66);
}

/* ---------- 布局骨架 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: clamp(40px, 7vw, 80px);
}

.page-about .rail-index {
  display: none;
}

.page-about .timeline {
  position: relative;
  padding-top: clamp(30px, 5vw, 52px);
  min-width: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(30, 122, 68, 0) 0%,
    var(--about-line) 5%,
    var(--about-line) 92%,
    rgba(30, 122, 68, 0) 100%
  );
}

/* ---------- 时间轴条目 ---------- */

.page-about .tl-item {
  position: relative;
  padding-left: clamp(26px, 5vw, 52px);
  padding-block: var(--stage-gap, 48px);
  scroll-margin-top: 120px;
  min-width: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--stage-gap, 48px) + 6px);
  width: 11px;
  height: 11px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--whistle-yellow);
  border: 2px solid var(--ink-green);
  z-index: 1;
}

.page-about .tl-item--s1 { --stage-gap: clamp(38px, 7.2vw, 80px); }
.page-about .tl-item--s2 { --stage-gap: clamp(34px, 6.2vw, 68px); }
.page-about .tl-item--s3 { --stage-gap: clamp(30px, 5.4vw, 58px); }
.page-about .tl-item--s4 { --stage-gap: clamp(26px, 4.6vw, 50px); }
.page-about .tl-item--s5 { --stage-gap: clamp(22px, 3.6vw, 40px); }
.page-about .tl-item--s6 { --stage-gap: clamp(20px, 3vw, 34px); }

.page-about .stage-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--turf-green);
}

.page-about .stage-tag__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--chalk-white);
  background: var(--ink-green);
  border-radius: 6px;
  padding: 3px 7px;
}

.page-about .tl-item .section-title {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(23px, 3.4vw, 33px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

.page-about .lede {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .prose p {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.88;
  color: var(--about-ink-soft);
}

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

.page-about .prose a {
  color: var(--tactic-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(24, 69, 126, 0.35);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-about .prose a:hover {
  color: var(--turf-green);
  border-bottom-color: var(--turf-green);
}

/* ---------- 图文分栏 ---------- */

.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 22px;
}

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

.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-about .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--about-ink-faint);
}

.page-about .split--reverse .split__text {
  order: 1;
}

.page-about .split--reverse .split__media {
  order: 2;
}

/* ---------- 赛季对照表 ---------- */

.page-about .season-board {
  position: relative;
  margin-top: 24px;
}

.page-about .season-pick {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .season-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .season-legend label {
  font-family: var(--font-label);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--concrete-gray);
  background: var(--chalk-white);
  color: var(--ink-green);
  cursor: pointer;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .season-legend label:hover {
  border-color: var(--turf-green);
  background: var(--paper-cream);
}

.page-about .season-pick:focus-visible ~ .season-legend label {
  outline: 2px solid var(--tactic-blue);
  outline-offset: 2px;
}

.page-about #scol-all:checked ~ .season-legend label[for="scol-all"],
.page-about #scol-games:checked ~ .season-legend label[for="scol-games"],
.page-about #scol-new:checked ~ .season-legend label[for="scol-new"],
.page-about #scol-pace:checked ~ .season-legend label[for="scol-pace"] {
  background: var(--whistle-yellow);
  border-color: var(--ink-green);
  color: var(--ink-green);
}

.page-about .season-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--concrete-gray);
  border-radius: var(--radius-md);
  background: var(--chalk-white);
  -webkit-overflow-scrolling: touch;
}

.page-about .season-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .season-table__caption {
  caption-side: top;
  text-align: left;
  padding: 13px 16px;
  font-family: var(--font-label);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--about-ink-faint);
  border-bottom: 1px solid var(--concrete-gray);
}

.page-about .season-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--ink-green);
  color: var(--chalk-white);
  font-family: var(--font-label);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: left;
  padding: 12px 16px;
  white-space: nowrap;
}

.page-about .season-table tbody th,
.page-about .season-table tbody td {
  padding: 13px 16px;
  border-top: 1px solid rgba(199, 203, 197, 0.7);
}

.page-about .season-table tbody th {
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink-green);
}

.page-about .season-table tbody td {
  color: var(--about-ink-soft);
}

.page-about .season-table tbody tr:nth-child(even) {
  background: var(--paper-cream);
}

.page-about .season-table tbody td:nth-child(2),
.page-about .season-table tbody td:nth-child(4) {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.page-about #scol-games:checked ~ .season-table-wrap tbody tr > :nth-child(2),
.page-about #scol-new:checked ~ .season-table-wrap tbody tr > :nth-child(3),
.page-about #scol-pace:checked ~ .season-table-wrap tbody tr > :nth-child(4) {
  background: rgba(30, 122, 68, 0.14);
}

.page-about #scol-games:checked ~ .season-table-wrap thead th:nth-child(2),
.page-about #scol-new:checked ~ .season-table-wrap thead th:nth-child(3),
.page-about #scol-pace:checked ~ .season-table-wrap thead th:nth-child(4) {
  background: var(--turf-green);
}

.page-about .table-foot {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-ink-faint);
}

.page-about .table-foot a {
  color: var(--tactic-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(24, 69, 126, 0.35);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-about .table-foot a:hover {
  color: var(--turf-green);
  border-bottom-color: var(--turf-green);
}

/* ---------- 记录流程 ---------- */

.page-about .flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--concrete-gray);
  border: 1px solid var(--concrete-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .flow__step {
  background: var(--chalk-white);
  padding: 20px 20px 22px;
  min-width: 0;
  transition: background var(--t) var(--ease);
}

.page-about .flow__step:hover {
  background: var(--paper-cream);
}

.page-about .flow__time {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(24, 69, 126, 0.09);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.01em;
  color: var(--tactic-blue);
}

.page-about .flow__name {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-green);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .flow-media {
  margin: 26px 0 0;
}

/* ---------- 岗位构成 ---------- */

.page-about .roster {
  margin-top: 26px;
}

.page-about .roster__bar {
  display: flex;
  height: 40px;
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--ink-green);
}

.page-about .roster__seg {
  display: block;
  height: 100%;
  transition: filter var(--t) var(--ease);
}

.page-about .roster__seg--edit { flex: 12; background: var(--turf-green); }
.page-about .roster__seg--check { flex: 4; background: var(--tactic-blue); }
.page-about .roster__seg--youth { flex: 2; background: var(--mid-turf); }

.page-about .roster__bar:hover .roster__seg {
  filter: brightness(1.08);
}

.page-about .roster__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .roster__item {
  display: grid;
  grid-template-columns: 12px auto minmax(0, 1fr);
  grid-template-areas:
    "swatch count role"
    "swatch desc desc";
  align-items: baseline;
  column-gap: 10px;
  row-gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-sm);
  background: var(--chalk-white);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .roster__item:hover {
  border-color: var(--turf-green);
  background: var(--paper-cream);
}

.page-about .roster__swatch {
  grid-area: swatch;
  align-self: center;
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.page-about .roster__swatch--edit { background: var(--turf-green); }
.page-about .roster__swatch--check { background: var(--tactic-blue); }
.page-about .roster__swatch--youth { background: var(--mid-turf); }

.page-about .roster__count {
  grid-area: count;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .roster__role {
  grid-area: role;
  font-family: var(--font-label);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink-green);
}

.page-about .roster__desc {
  grid-area: desc;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .roster__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--whistle-yellow);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 栏目演进 ---------- */

.page-about .col-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .col-node {
  position: relative;
  padding: 15px 18px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: var(--chalk-white);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .col-node:hover,
.page-about .col-node:focus-within,
.page-about .col-node:focus {
  border-color: var(--turf-green);
  background: var(--paper-cream);
  outline: none;
}

.page-about .col-node:focus-visible {
  outline: 2px solid var(--tactic-blue);
  outline-offset: 2px;
}

.page-about .col-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .col-node__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--turf-green);
}

.page-about .col-node__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 18.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-green);
}

.page-about .col-node__card {
  overflow: hidden;
  max-height: 40em;
  opacity: 1;
  margin-top: 10px;
  transition: max-height var(--t) var(--ease), opacity var(--t) var(--ease), margin-top var(--t) var(--ease);
}

.page-about .col-node__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 收尾 ---------- */

.page-about .outro {
  background: var(--paper-cream);
  border-top: 1px solid var(--concrete-gray);
  padding: clamp(36px, 6vw, 64px) 0 clamp(44px, 7vw, 76px);
}

.page-about .outro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .outro__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--turf-green);
}

.page-about .outro__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1.32;
  color: var(--ink-green);
}

.page-about .outro__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .outro__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .outro__links a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--concrete-gray);
  border-radius: var(--radius-md);
  background: var(--chalk-white);
  text-decoration: none;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .outro__links a:hover {
  border-color: var(--turf-green);
  background: var(--chalk-white);
}

.page-about .outro__link-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-green);
  transition: color var(--t) var(--ease);
}

.page-about .outro__links a:hover .outro__link-title {
  color: var(--turf-green);
}

.page-about .outro__link-desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-faint);
}

/* ---------- 媒体查询 ---------- */

@media (min-width: 620px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .roster__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .outro__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    align-items: start;
    gap: 34px;
  }

  .page-about .split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  }

  .page-about .outro__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 40px;
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .col-node__card {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }

  .page-about .col-node:hover .col-node__card,
  .page-about .col-node:focus-within .col-node__card,
  .page-about .col-node:focus .col-node__card {
    max-height: 18em;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 148px;
    column-gap: 36px;
  }

  .page-about .rail-index {
    display: block;
    grid-column: 2;
    grid-row: 1;
    align-self: start;
    position: sticky;
    top: 128px;
    padding-top: clamp(30px, 5vw, 52px);
  }

  .page-about .rail-index ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
  }

  .page-about .rail-index a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--about-ink-faint);
    transition: color var(--t) var(--ease);
  }

  .page-about .rail-index__tick {
    display: block;
    width: 14px;
    height: 1px;
    background: var(--concrete-gray);
    flex: none;
    transition: width var(--t) var(--ease), background var(--t) var(--ease);
  }

  .page-about .rail-index__txt {
    font-family: var(--font-label);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: 0.05em;
  }

  .page-about .rail-index a:hover {
    color: var(--ink-green);
  }

  .page-about .rail-index a:hover .rail-index__tick {
    width: 26px;
    background: var(--whistle-yellow);
  }

  .page-about .tl-item {
    padding-left: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .col-node__card,
  .page-about .season-legend label,
  .page-about .flow__step,
  .page-about .roster__item,
  .page-about .outro__links a {
    transition: none;
  }
}