.page-about {
  --about-rail-w: 176px;
  --about-gap: 40px;
  --about-block-gap: 72px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  left: -220px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle at center, rgba(200, 16, 46, .34), rgba(200, 16, 46, 0) 68%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero-copy .display-xl {
  margin: 14px 0 18px;
}

.page-about .about-hero-copy .lede {
  max-width: 52ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line-gold);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}

.page-about .about-hero-media .media-caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  margin: 0;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(11, 18, 32, .74);
  border-left: 3px solid var(--c-gold);
  font-size: .82rem;
  line-height: 1.6;
  color: var(--c-paper);
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
  margin: 44px 0 0;
  padding: 26px 0 0;
  list-style: none;
  border-top: 1px solid var(--c-line-soft);
}

.page-about .about-hero-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero-fact .stat-value {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
}

.page-about .about-hero-fact .stat-label {
  font-size: .84rem;
  color: var(--c-slate);
  letter-spacing: .04em;
}

/* ---------- 长卷主体：侧栏 + 内容 ---------- */
.page-about .about-body {
  display: block;
  margin-top: 24px;
}

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

.page-about .about-main {
  min-width: 0;
}

.page-about .about-block {
  padding: 48px 0;
  border-top: 1px solid var(--c-line-soft);
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 24px;
}

.page-about .about-block .section-title {
  margin: 12px 0 20px;
  max-width: 22ch;
}

.page-about .about-block .lede {
  max-width: 62ch;
  margin-bottom: 30px;
}

/* ---------- 左右错位 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  max-width: 72ch;
}

.page-about .about-split-text p {
  margin: 0 0 16px;
  color: rgba(245, 239, 230, .88);
}

.page-about .about-note {
  align-self: start;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: var(--c-surface);
  border: 1px solid var(--c-line-gold);
  position: relative;
}

.page-about .about-note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--c-gold), rgba(232, 178, 74, 0));
}

.page-about .about-note p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(245, 239, 230, .8);
}

.page-about .about-note-idx {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--c-gold);
  margin-bottom: 10px !important;
}

.page-about .about-quote {
  margin: 36px 0 0;
  padding: 26px 0 4px 24px;
  border-left: 4px solid var(--c-red);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.4vw, 1.9rem);
  line-height: 1.55;
  color: var(--c-paper);
  max-width: 30ch;
}

.page-about .about-quote span {
  display: block;
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: .92rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--c-slate);
}

/* ---------- 三条内容线 ---------- */
.page-about .about-line-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-line-card {
  position: relative;
  padding: 26px 22px 22px;
  border-radius: var(--radius-lg);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  overflow: hidden;
  transition: transform .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-line-card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--c-gold);
}

.page-about .about-line-card--cyan::after { background: var(--c-cyan); }
.page-about .about-line-card--green::after { background: var(--c-green); }

.page-about .about-line-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-line-gold);
}

.page-about .about-line-idx,
.page-about .about-role-idx {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--c-slate);
  margin: 0 0 12px;
}

.page-about .about-line-card .panel-title {
  margin: 0 0 12px;
  font-size: 1.125rem;
  color: var(--c-paper);
}

.page-about .about-line-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(245, 239, 230, .78);
}

.page-about .about-line-meta {
  margin-top: 16px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  font-family: var(--font-data);
  font-size: .74rem !important;
  letter-spacing: .08em;
  color: var(--c-slate) !important;
}

.page-about .about-rhythm {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 26px 0 0;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(18, 22, 28, .6);
  border: 1px solid var(--c-line-soft);
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(245, 239, 230, .78);
}

.page-about .about-rhythm .status-dot {
  flex: 0 0 auto;
  margin-top: 8px;
}

.page-about .about-rhythm a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 青训（球场绿分区） ---------- */
.page-about .about-block--green {
  position: relative;
  margin: 32px 0;
  padding: 34px 22px 38px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(31, 138, 76, .42);
  background:
    linear-gradient(148deg, rgba(31, 138, 76, .26), rgba(11, 18, 32, .94) 58%),
    repeating-linear-gradient(90deg, rgba(31, 138, 76, .08) 0 2px, rgba(31, 138, 76, 0) 2px 84px);
  border-top: 1px solid rgba(31, 138, 76, .42);
}

.page-about .about-block--green .section-title {
  max-width: 20ch;
}

.page-about .about-youth-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.page-about .about-youth-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(31, 138, 76, .5);
  margin: 0;
}

.page-about .about-youth-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-youth-media .media-caption {
  padding: 12px 16px;
  background: rgba(11, 18, 32, .72);
  font-size: .82rem;
  color: var(--c-slate);
}

.page-about .about-youth-copy p {
  margin: 0 0 16px;
  color: rgba(245, 239, 230, .88);
}

.page-about .about-fact-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .about-fact-list li {
  position: relative;
  padding: 12px 16px 12px 34px;
  border-radius: var(--radius-sm);
  background: rgba(11, 18, 32, .62);
  border: 1px solid rgba(31, 138, 76, .3);
  font-size: .88rem;
  line-height: 1.65;
  color: rgba(245, 239, 230, .86);
}

.page-about .about-fact-list li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 19px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(31, 138, 76, .22);
}

.page-about .about-fact-list strong {
  font-family: var(--font-data);
  font-weight: 500;
  color: var(--c-paper);
  letter-spacing: .02em;
}

.page-about .about-fact-list--plain li::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, .2);
}

.page-about .about-fact-list--plain li {
  background: rgba(18, 22, 28, .66);
  border-color: var(--c-line-soft);
}

/* ---------- 华南 ---------- */
.page-about .about-south-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-south-copy p {
  margin: 0 0 16px;
  color: rgba(245, 239, 230, .88);
}

.page-about .about-south-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
}

.page-about .about-south-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-south-media .media-caption {
  padding: 12px 16px;
  background: rgba(11, 18, 32, .72);
  font-size: .82rem;
  color: var(--c-slate);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-milestone {
  position: relative;
  padding: 0 0 30px 30px;
  margin-left: 6px;
  border-left: 1px solid var(--c-line-gold);
  transition: border-color .22s var(--ease);
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(232, 178, 74, .16);
  transition: box-shadow .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-milestone:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .about-milestone:hover::before {
  transform: scale(1.15);
  box-shadow: 0 0 0 7px rgba(232, 178, 74, .22);
}

.page-about .about-year {
  display: block;
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .18em;
  color: var(--c-gold);
  margin-bottom: 8px;
}

.page-about .about-milestone .panel-title {
  margin: 0 0 10px;
  font-size: 1.06rem;
  color: var(--c-paper);
}

.page-about .about-milestone p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(245, 239, 230, .78);
  max-width: 60ch;
}

/* ---------- 团队 ---------- */
.page-about .about-role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-role {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  background: var(--c-surface-2);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-cyan);
  transition: transform .22s var(--ease);
}

.page-about .about-role:nth-child(2) { border-left-color: var(--c-orange); }
.page-about .about-role:nth-child(3) { border-left-color: var(--c-gold); }

.page-about .about-role:hover {
  transform: translateY(-3px);
}

.page-about .about-role .panel-title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--c-paper);
}

.page-about .about-role p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.78;
  color: rgba(245, 239, 230, .78);
}

/* ---------- 里程碑与合作 ---------- */
.page-about .about-mile-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-mile {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(200, 16, 46, .16), rgba(18, 22, 28, .78));
  border: 1px solid rgba(200, 16, 46, .3);
}

.page-about .about-mile-year {
  display: block;
  font-family: var(--font-data);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--c-gold);
  margin-bottom: 8px;
}

.page-about .about-mile p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.72;
  color: rgba(245, 239, 230, .82);
}

.page-about .about-sub-title {
  margin: 40px 0 18px;
  font-size: 1.15rem;
  color: var(--c-paper);
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-partner {
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
}

.page-about .about-partner-title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--c-gold);
}

.page-about .about-partner p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(245, 239, 230, .78);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin: 56px 0 32px;
  padding: 34px 24px;
  border-radius: var(--radius-lg);
}

.page-about .about-cta .section-title {
  margin: 10px 0 14px;
  max-width: 18ch;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 58ch;
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(245, 239, 230, .82);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-block--green {
    padding: 44px 34px 48px;
  }

  .page-about .about-youth-grid {
    grid-template-columns: 5fr 7fr;
    gap: 32px;
  }

  .page-about .about-south-grid {
    grid-template-columns: 7fr 5fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-milestone {
    padding-left: 34px;
  }
}

/* ---------- 桌面：竖向轨道贯穿全页 ---------- */
@media (min-width: 1080px) {
  .page-about .about-hero-grid {
    grid-template-columns: 5fr 7fr;
    gap: 52px;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
    margin-top: 40px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h, 72px) + 28px);
    padding-top: 26px;
    border-top: 2px solid var(--c-gold);
  }

  .page-about .about-rail-title {
    margin: 0 0 16px;
    font-family: var(--font-data);
    font-size: .7rem;
    letter-spacing: .24em;
    color: var(--c-slate);
    text-transform: uppercase;
  }

  .page-about .about-rail-list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
  }

  .page-about .about-rail-list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(180deg, var(--c-line-gold), rgba(232, 178, 74, 0));
  }

  .page-about .about-rail-link {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 9px 0 9px 20px;
    font-size: .86rem;
    line-height: 1.5;
    color: var(--c-slate);
    text-decoration: none;
    transition: color .2s var(--ease), transform .2s var(--ease);
  }

  .page-about .about-rail-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 15px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--c-night);
    border: 1px solid var(--c-line-gold);
    transition: background .2s var(--ease), box-shadow .2s var(--ease);
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link.is-current {
    color: var(--c-paper);
    transform: translateX(3px);
  }

  .page-about .about-rail-link.is-current::before {
    background: var(--c-gold);
    box-shadow: 0 0 0 4px rgba(232, 178, 74, .2);
  }

  .page-about .about-rail-idx {
    font-family: var(--font-data);
    font-size: .68rem;
    letter-spacing: .14em;
    color: var(--c-gold);
  }

  .page-about .about-block {
    padding: var(--about-block-gap) 0;
  }

  .page-about .about-block:first-child {
    padding-top: 26px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 44px;
    max-width: none;
    align-items: start;
  }

  .page-about .about-block--green {
    margin: 24px 0;
    padding: 52px 46px 56px;
  }

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

  .page-about .about-cta {
    padding: 46px 44px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-line-card,
  .page-about .about-role,
  .page-about .about-rail-link,
  .page-about .about-milestone::before {
    transition: none;
  }

  .page-about .about-line-card:hover,
  .page-about .about-role:hover,
  .page-about .about-rail-link:hover,
  .page-about .about-rail-link.is-current {
    transform: none;
  }
}