.page-about {
  --about-rule: 1px solid var(--sand-24);
  display: block;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .wrap {
  padding-inline: var(--gutter);
}

.page-about .about-section {
  padding-block: 56px;
}

.page-about .section-head {
  margin-bottom: 28px;
}

.page-about .section-head__title {
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: -0.01em;
}

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

.page-about .media__frame {
  overflow: hidden;
  background: var(--night-2);
}

.page-about .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-soft);
}

/* ---------- 首屏 ---------- */

.page-about .about-lede {
  background: var(--night);
  color: var(--paper);
  padding-block: 32px 48px;
  border-bottom: 2px solid var(--sand);
}

.page-about .about-lede__crumb {
  margin-bottom: 28px;
}

.page-about .about-lede__crumb .breadcrumb__link {
  color: var(--paper-48);
  text-decoration: none;
}

.page-about .about-lede__crumb .breadcrumb__link:hover {
  color: var(--sand);
}

.page-about .about-lede__crumb .breadcrumb__current {
  color: var(--paper-80);
}

.page-about .about-lede__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-lede__title {
  margin: 0 0 20px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 40px;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lede__intro {
  margin: 0 0 34px;
  max-width: 34ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper-80);
}

.page-about .about-lede__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--sand-24);
  border: 1px solid var(--sand-24);
}

.page-about .about-lede__stat {
  background: var(--night);
  padding: 16px 14px 18px;
}

.page-about .about-lede__num {
  display: block;
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--sand);
}

.page-about .about-lede__unit {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--paper-48);
}

/* ---------- 年表 ---------- */

.page-about .about-timeline {
  background: var(--paper);
}

.page-about .about-timeline__media {
  margin: 0 0 34px;
}

.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 30px;
}

.page-about .about-years__link {
  display: inline-block;
  padding: 6px 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--ink-18);
  transition: border-color 0.15s linear, color 0.15s linear;
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  border-color: var(--sand);
  color: var(--signal-deep);
}

.page-about .about-timeline__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--sand-44);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 22px 0 22px 22px;
  border-bottom: 1px solid var(--ink-10);
  transition: background 0.15s linear, box-shadow 0.15s linear;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 32px;
  width: 5px;
  height: 5px;
  background: var(--sand);
}

.page-about .about-timeline__item:target {
  background: var(--paper-2);
  box-shadow: inset 3px 0 0 var(--sand);
}

.page-about .about-timeline__mark {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-timeline__year {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

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

/* ---------- 收录口径 ---------- */

.page-about .about-scope {
  background: var(--night-2);
  color: var(--paper-80);
}

.page-about .section-head--light .section-head__num {
  color: var(--sand);
}

.page-about .section-head--light .section-head__title,
.page-about .about-scope .section-head__title,
.page-about .about-roster .section-head__title,
.page-about .about-team .section-head__title {
  color: var(--paper);
}

.page-about .section-head--light .section-head__note,
.page-about .about-scope .section-head__note,
.page-about .about-roster .section-head__note,
.page-about .about-team .section-head__note {
  color: var(--paper-48);
}

.page-about .about-scope__layout {
  display: grid;
  gap: 28px;
}

.page-about .about-scope__tablewrap {
  overflow-x: auto;
}

.page-about .about-scope__table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-scope__table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-scope__table th,
.page-about .about-scope__table td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--sand-24);
}

.page-about .about-scope__table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--paper-48);
}

.page-about .about-scope__table tbody th {
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-scope__table td {
  color: var(--paper-62);
}

.page-about .about-scope__table td.num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--sand);
  text-align: right;
}

.page-about .about-scope__total th,
.page-about .about-scope__total td {
  border-bottom: none;
  padding-top: 16px;
}

.page-about .about-scope__total td.num {
  color: var(--signal);
}

.page-about .about-scope__side-title {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scope__cups {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-scope__cup {
  padding: 16px 14px;
  background: var(--gobi);
  border-left: 2px solid var(--sand);
}

.page-about .about-scope__cup-n {
  display: block;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--sand-soft);
}

.page-about .about-scope__cup h4 {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scope__cup p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-62);
}

.page-about .about-scope__foot {
  margin: 20px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand);
}

/* ---------- 校对流程 ---------- */

.page-about .about-flow {
  background: var(--paper);
}

.page-about .about-flow__svg {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 30px;
}

.page-about .about-flow__node rect {
  fill: none;
  stroke: var(--ink-18);
  stroke-width: 1;
}

.page-about .about-flow__num {
  fill: var(--sand);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.page-about .about-flow__label {
  fill: var(--ink);
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-flow__sub {
  fill: var(--slate-soft);
  font-family: var(--font-body);
  font-size: 9.5px;
}

.page-about .about-flow__link {
  stroke: var(--sand);
  stroke-width: 1;
}

.page-about .about-flow__windows {
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ink-10);
  border: 1px solid var(--ink-10);
}

.page-about .about-flow__window {
  background: var(--paper);
  padding: 18px 16px;
}

.page-about .about-flow__window-t {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal-deep);
}

.page-about .about-flow__window h3 {
  margin: 8px 0 8px;
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow__window p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

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

/* ---------- 青训梯队 ---------- */

.page-about .about-roster {
  background: var(--night);
  color: var(--paper-62);
}

.page-about .about-roster__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  background: var(--sand-24);
  border: 1px solid var(--sand-24);
}

.page-about .about-roster__meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px;
  background: var(--night);
  font-size: 13px;
  color: var(--paper-48);
}

.page-about .about-roster__meta-n {
  font-size: 22px;
  font-weight: 700;
  color: var(--sand);
}

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

.page-about .about-roster__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-about .about-roster__chip {
  display: inline-block;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-62);
  border: 1px solid var(--sand-24);
  cursor: pointer;
  transition: background 0.15s linear, color 0.15s linear, border-color 0.15s linear;
}

.page-about .about-roster__chip:hover {
  border-color: var(--sand);
  color: var(--sand);
}

.page-about #lv-all:checked ~ .about-roster__legend [for="lv-all"],
.page-about #lv-u15:checked ~ .about-roster__legend [for="lv-u15"],
.page-about #lv-u16:checked ~ .about-roster__legend [for="lv-u16"],
.page-about #lv-u17:checked ~ .about-roster__legend [for="lv-u17"],
.page-about #lv-u18:checked ~ .about-roster__legend [for="lv-u18"],
.page-about #lv-u19:checked ~ .about-roster__legend [for="lv-u19"] {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--night);
}

.page-about #lv-u15:checked ~ .about-roster__cards .about-roster__card:not([data-level="u15"]),
.page-about #lv-u16:checked ~ .about-roster__cards .about-roster__card:not([data-level="u16"]),
.page-about #lv-u17:checked ~ .about-roster__cards .about-roster__card:not([data-level="u17"]),
.page-about #lv-u18:checked ~ .about-roster__cards .about-roster__card:not([data-level="u18"]),
.page-about #lv-u19:checked ~ .about-roster__cards .about-roster__card:not([data-level="u19"]) {
  display: none;
}

.page-about .about-roster__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-roster__card {
  padding: 18px 16px 20px;
  background: var(--night-2);
  border: 1px solid var(--sand-24);
  transition: border-color 0.15s linear;
}

.page-about .about-roster__card:hover {
  border-color: var(--sand);
}

.page-about .about-roster__code {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-roster__role {
  margin: 0 0 14px;
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-roster__dl {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  margin: 0;
  font-size: 14px;
}

.page-about .about-roster__dl dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-48);
}

.page-about .about-roster__dl dd {
  margin: 0;
  line-height: 1.6;
  color: var(--paper-80);
}

.page-about .about-roster__dl--sub {
  margin-top: 12px;
}

.page-about .about-roster__more {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--sand-24);
}

.page-about .about-roster__more summary {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand);
  cursor: pointer;
}

.page-about .about-roster__more summary:hover {
  color: var(--sand-soft);
}

/* ---------- 裁判档案 ---------- */

.page-about .about-referee {
  background: var(--paper);
}

.page-about .about-referee__tablewrap {
  overflow-x: auto;
}

.page-about .about-referee__table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-referee__caption {
  padding-bottom: 12px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-soft);
}

.page-about .about-referee__table thead th {
  padding: 10px 12px;
  background: var(--slate);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-align: left;
}

.page-about .about-referee__table tbody th,
.page-about .about-referee__table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--ink-10);
  text-align: left;
  color: var(--ink);
}

.page-about .about-referee__table tbody th {
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-referee__table tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-about .about-referee__table tbody tr:hover {
  background: var(--sand-24);
}

.page-about .about-referee__table td.num {
  position: relative;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal-deep);
  text-align: right;
}

.page-about .about-referee__memo {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: block;
  padding: 4px 7px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--paper);
  background: var(--ink);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s linear;
}

.page-about .about-referee__table tbody tr:hover .about-referee__memo {
  opacity: 1;
}

.page-about .about-referee__notes {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-referee__notes .mono {
  display: inline-block;
  min-width: 4em;
  margin-right: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal-deep);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: var(--night-2);
  color: var(--paper-62);
}

.page-about .about-team__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .about-team__item {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--sand-24);
}

.page-about .about-team__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-team__role {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__count {
  font-size: 24px;
  font-weight: 700;
  color: var(--sand);
}

.page-about .about-team__bar {
  height: 4px;
  background: var(--gobi);
  overflow: hidden;
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  background: var(--sand);
}

.page-about .about-team__item:nth-child(1) .about-team__fill { width: 100%; }
.page-about .about-team__item:nth-child(2) .about-team__fill { width: 66.7%; }
.page-about .about-team__item:nth-child(3) .about-team__fill { width: 33.3%; }
.page-about .about-team__item:nth-child(4) .about-team__fill { width: 25%; }
.page-about .about-team__item:nth-child(5) .about-team__fill { width: 41.7%; }

.page-about .about-team__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-62);
}

/* ---------- 合作与更正 ---------- */

.page-about .about-partner {
  background: var(--paper-2);
}

.page-about .about-partner__list {
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ink-10);
  border: 1px solid var(--ink-10);
}

.page-about .about-partner__item {
  background: var(--paper);
  padding: 18px 16px 20px;
}

.page-about .about-partner__n {
  display: block;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-partner__item h3 {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-partner__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-partner__record {
  padding: 22px 18px;
  background: var(--gobi);
  border-left: 3px solid var(--sand);
}

.page-about .about-partner__record-n {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand-soft);
}

.page-about .about-partner__record-t {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-partner__record-d {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-80);
}

.page-about .about-partner__correct {
  margin-top: 30px;
}

.page-about .about-partner__correct-title {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-partner__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-about .about-partner__steps li {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr);
  gap: 12px;
  padding: 14px 14px 14px 12px;
  background: var(--paper);
  border: 1px solid var(--ink-10);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-partner__steps .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal-deep);
}

.page-about .about-partner__steps a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

.page-about .about-partner__steps a:hover {
  color: var(--signal-deep);
  border-bottom-color: var(--signal);
}

.page-about .about-partner__contact {
  margin: 18px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-soft);
}

/* ---------- 页尾导流 ---------- */

.page-about .about-next {
  padding-block: 48px 64px;
  background: var(--night);
}

.page-about .about-next__title {
  margin: 0 0 22px;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-next__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--sand-24);
  border: 1px solid var(--sand-24);
}

.page-about .about-next__link {
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr);
  gap: 4px 12px;
  padding: 18px 16px;
  background: var(--night);
  text-decoration: none;
  transition: background 0.15s linear;
}

.page-about .about-next__link:hover {
  background: var(--night-2);
}

.page-about .about-next__num {
  grid-row: span 2;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-next__label {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-next__link:hover .about-next__label {
  color: var(--sand);
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-48);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-lede__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-roster__meta {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-flow__windows {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }

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

  .page-about .about-next__link {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto auto;
  }

  .page-about .about-next__num {
    grid-row: auto;
  }
}

@media (min-width: 768px) {
  .page-about .about-section {
    padding-block: 88px;
  }

  .page-about .about-lede {
    padding-block: 48px 72px;
  }

  .page-about .about-lede__title {
    font-size: 64px;
  }

  .page-about .about-lede__num {
    font-size: 56px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    padding: 26px 0 26px 28px;
  }

  .page-about .about-timeline__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0;
  }

  .page-about .about-timeline__year {
    font-size: 40px;
  }

  .page-about .about-scope__layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-flow__windows {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-roster__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
  }

  .page-about .about-roster__card:nth-child(even) {
    margin-top: 22px;
  }

  .page-about .about-referee__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 32px;
  }

  .page-about .about-next {
    padding-block: 64px 88px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-lede__title {
    font-size: 96px;
    max-width: 14ch;
  }

  .page-about .about-lede__intro {
    max-width: 46ch;
  }

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

  .page-about .about-roster__card:nth-child(even) {
    margin-top: 0;
  }

  .page-about .about-roster__card:nth-child(3n + 2) {
    margin-top: 24px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }
}