.page-about {
  --about-rule: rgba(20, 24, 26, 0.12);
  padding-top: 24px;
  padding-bottom: 64px;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding: 28px 0 36px;
  border-bottom: 2px solid var(--graphite);
}

.page-about .about-intro__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-about .about-intro__title {
  margin: 0 0 20px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.16;
  color: var(--graphite);
}

.page-about .about-intro__lede {
  margin: 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-intro__marks {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .about-intro__marks li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 3px solid var(--pitch-ink);
}

.page-about .about-intro__marks li:nth-child(1) { border-left-color: var(--referee-red); }
.page-about .about-intro__marks li:nth-child(2) { border-left-color: var(--warn-yellow); }
.page-about .about-intro__marks li:nth-child(3) { border-left-color: var(--data-teal); }
.page-about .about-intro__marks li:nth-child(4) { border-left-color: var(--pitch-ink); }

.page-about .about-intro__marks .stat-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--graphite);
}

.page-about .about-intro__mark-label {
  font-size: 13px;
  color: var(--slate);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: 56px 0 4px;
}

.page-about .about-section__lead {
  margin: 20px 0 28px;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 01 品牌起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .origin-copy p {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--graphite);
}

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

.page-about .origin-figure {
  margin: 0;
}

.page-about .origin-figure__caption {
  margin-top: 12px;
  padding-left: 10px;
  border-left: 3px solid var(--warn-yellow);
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .season-track {
  list-style: none;
  margin: 40px 0 0;
  padding: 0 0 0 22px;
  border-left: 2px solid var(--warm-paper);
  display: grid;
  gap: 22px;
}

.page-about .season-track__node {
  position: relative;
}

.page-about .season-track__node::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--pitch-ink);
}

.page-about .season-track__node:nth-child(3)::before {
  border-color: var(--referee-red);
}

.page-about .season-track__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--graphite);
}

.page-about .season-track__node p {
  margin: 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 02 赛事覆盖 ---------- */
.page-about .league-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .league-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
}

.page-about .league-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .league-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--graphite);
}

.page-about .league-card__meta {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--about-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.page-about .league-card .tag {
  align-self: flex-start;
}

/* ---------- 03 教练履历 ---------- */
.page-about .coach-layout {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .coach-figure {
  margin: 0;
}

.page-about .coach-figure__caption {
  margin-top: 12px;
  padding-left: 10px;
  border-left: 3px solid var(--pitch-ink);
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .coach-copy p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--graphite);
}

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

.page-about .coach-grid {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .coach-card {
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
}

.page-about .coach-card__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .coach-card__formation {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-about .coach-card__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  color: var(--referee-red);
}

.page-about .coach-card__count-label {
  font-size: 12px;
  color: var(--slate);
}

.page-about .coach-card__pitch {
  width: 100%;
  height: auto;
  margin: 14px 0 16px;
  background: var(--warm-paper);
}

.page-about .coach-card__pitch rect,
.page-about .coach-card__pitch line,
.page-about .coach-card__pitch .ring {
  fill: none;
  stroke: rgba(20, 24, 26, 0.24);
  stroke-width: 0.9;
}

.page-about .coach-card__pitch .dot {
  fill: var(--pitch-ink);
  stroke: none;
}

.page-about .coach-card__detail {
  margin-top: auto;
}

.page-about .coach-card__detail summary {
  list-style: none;
  cursor: pointer;
  padding-top: 10px;
  border-top: 1px dashed var(--about-rule);
  font-size: 13px;
  color: var(--referee-red);
}

.page-about .coach-card__detail summary::-webkit-details-marker {
  display: none;
}

.page-about .coach-card__detail summary::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-about .coach-card__detail[open] summary::after {
  content: " −";
}

.page-about .coach-card__detail ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-about .coach-card__detail li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--about-rule);
  font-size: 13px;
  color: var(--slate);
}

.page-about .coach-card__detail li span {
  font-family: var(--font-mono);
  color: var(--graphite);
}

/* ---------- 04 青训年龄轴 ---------- */
.page-about .about-section--youth {
  margin-top: 48px;
  padding: 40px 20px 44px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(245, 197, 24, 0.14), rgba(247, 245, 240, 0) 62%),
    var(--paper);
  box-shadow: var(--flat-shadow);
}

.page-about .youth-figure {
  margin: 24px 0 0;
}

.page-about .youth-lead {
  margin: 26px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .youth-axis {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .youth-node {
  position: relative;
  padding: 16px 14px 18px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-top: 3px solid var(--pitch-ink);
  transition: transform 320ms var(--ease), border-color 320ms var(--ease),
    box-shadow 320ms var(--ease);
}

.page-about .youth-node:hover,
.page-about .youth-node:focus-within {
  transform: translateY(-6px);
  border-top-color: var(--referee-red);
  box-shadow: var(--stack-shadow);
}

.page-about .youth-node__age {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-about .youth-node__count {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--slate);
}

.page-about .youth-node__count .stat-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--referee-red);
}

.page-about .youth-node__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.66;
  color: var(--slate);
}

/* ---------- 05 梯队到一线队 ---------- */
.page-about .path-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  box-shadow: var(--flat-shadow);
}

.page-about .path-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .path-table th,
.page-about .path-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .path-table thead th {
  background: var(--pitch-ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.page-about .path-table tbody th {
  font-weight: 500;
  color: var(--graphite);
}

.page-about .path-table tbody td {
  font-family: var(--font-mono);
  color: var(--graphite);
}

.page-about .path-table thead .path-table__pro {
  background: var(--referee-red);
  color: var(--paper);
}

.page-about .path-table tbody .path-table__pro {
  color: var(--referee-red);
  font-weight: 600;
}

.page-about .path-table tbody tr:last-child th,
.page-about .path-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .path-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .path-steps__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--warn-yellow);
}

.page-about .path-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.66;
  color: var(--graphite);
}

.page-about .path-steps__idx {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--pitch-ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

/* ---------- 06 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .eco-card {
  padding: 22px 20px;
}

.page-about .eco-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  color: var(--graphite);
}

.page-about .eco-card__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--graphite);
}

.page-about .eco-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

.page-about .about-next {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 2px solid var(--graphite);
  display: grid;
  gap: 10px;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 16px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  color: var(--graphite);
  font-size: 15px;
  text-decoration: none;
  transition: background 240ms var(--ease), color 240ms var(--ease),
    border-color 240ms var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--pitch-ink);
  border-color: var(--pitch-ink);
  color: var(--paper);
}

.page-about .about-next__link span {
  font-family: var(--font-mono);
}

/* ---------- 滚动显现 ---------- */
.page-about.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

.page-about.js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .league-grid,
  .page-about .eco-grid,
  .page-about .coach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-about .about-intro__marks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .season-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    padding: 30px 0 0;
    border-left: 0;
    border-top: 2px solid var(--warm-paper);
  }

  .page-about .season-track__node::before {
    left: 0;
    top: -37px;
  }

  .page-about .about-section--youth {
    padding: 48px 32px 52px;
  }

  .page-about .youth-axis {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-next__link + .about-next__link {
    border-left: 0;
  }
}

@media (min-width: 900px) {
  .page-about .coach-layout {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .youth-axis {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

@media (min-width: 1080px) {
  .page-about .about-intro__title {
    font-size: 50px;
  }

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

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

  .page-about .origin-copy p,
  .page-about .coach-copy p,
  .page-about .about-intro__lede,
  .page-about .about-section__lead,
  .page-about .youth-lead {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about.js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .youth-node,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .youth-node:hover,
  .page-about .youth-node:focus-within {
    transform: none;
  }
}