.page-about {
  --pa-line: rgba(200, 162, 74, .32);
  --pa-line-soft: rgba(143, 163, 155, .18);
  --pa-panel: linear-gradient(160deg, rgba(22, 32, 28, .94), rgba(8, 26, 21, .9));
  --pa-space: clamp(48px, 7vw, 88px);
  --pa-radius: 22px;
  color: var(--bone);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: 18px;
  padding-block: clamp(34px, 6vw, 68px) clamp(26px, 4vw, 44px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(200, 162, 74, .16), transparent 56%),
    radial-gradient(90% 80% at 100% 100%, rgba(47, 199, 216, .14), transparent 62%),
    linear-gradient(180deg, rgba(8, 26, 21, .7), transparent 76%);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -16%;
  top: 8%;
  width: min(56vw, 480px);
  aspect-ratio: 1 / 1;
  border-radius: 30px;
  background: repeating-conic-gradient(from 0deg,
      rgba(124, 226, 75, .09) 0deg 90deg,
      transparent 90deg 180deg);
  transform: rotate(12deg);
  z-index: -1;
  pointer-events: none;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 60ch;
  color: var(--bone);
  opacity: .88;
}

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

.page-about .about-hero__stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  padding: 16px 18px;
  border: 1px solid var(--pa-line);
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, rgba(22, 32, 28, .92), rgba(8, 26, 21, .78));
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.08;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding-block: var(--pa-space);
  border-top: 1px solid var(--pa-line-soft);
}

.page-about .about-section:first-of-type {
  border-top: 0;
}

.page-about .about-lead {
  max-width: 62ch;
  margin: 0 0 28px;
  color: var(--bone);
  opacity: .86;
}

.page-about .about-note {
  margin: 26px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--pa-line);
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-split {
  align-items: start;
  gap: 34px;
}

.page-about .about-split__body p {
  margin: 0 0 18px;
  max-width: 42ch;
}

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

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

.page-about .about-figure img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 规模侧栏 ---------- */
.page-about .stat-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .stat-rail__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 18px;
  border: 1px solid var(--pa-line-soft);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(22, 32, 28, .62);
}

.page-about .stat-rail__num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--gold-soft);
  min-width: 2.2ch;
}

.page-about .stat-rail__label {
  font-size: 15px;
  color: var(--muted);
}

/* ---------- 赛区 Bento ---------- */
.page-about .tier-board {
  display: grid;
  gap: 14px;
  grid-template-areas:
    "lead"
    "prov"
    "city"
    "node"
    "tags";
}

.page-about .tier-board__cell {
  padding: 20px 22px;
  border: 1px solid var(--pa-line);
  border-radius: var(--r-md);
  background: var(--pa-panel);
}

.page-about .tier-board__cell--lead {
  grid-area: lead;
  border-color: var(--line-gold-strong);
  background:
    linear-gradient(140deg, rgba(200, 162, 74, .18), rgba(14, 43, 35, .94) 62%);
}

.page-about .tier-board__cell--prov {
  grid-area: prov;
}

.page-about .tier-board__cell--city {
  grid-area: city;
}

.page-about .tier-board__cell--node {
  grid-area: node;
}

.page-about .tier-board__cell--tags {
  grid-area: tags;
}

.page-about .tier-board__kick {
  display: block;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .tier-board__big {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 8vw, 52px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--bone);
  margin-bottom: 12px;
}

.page-about .tier-board__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .tier-board__cell--lead .tier-board__desc {
  color: var(--bone);
  opacity: .82;
}

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

.page-about .tier-tag {
  padding: 6px 13px;
  border: 1px solid var(--pa-line);
  border-radius: var(--pill);
  font-size: 13px;
  color: var(--bone);
  background: rgba(14, 43, 35, .72);
}

/* ---------- 青训归档 ---------- */
.page-about .about-segmented-wrap {
  margin-top: 34px;
}

.page-about .about-segmented-wrap > .segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

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

.page-about .archive__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--pa-line-soft);
  border-radius: var(--r-sm);
  background: rgba(22, 32, 28, .7);
}

.page-about .archive__code {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--neon);
  letter-spacing: .04em;
}

.page-about .archive__name {
  font-size: 16px;
  color: var(--bone);
}

.page-about .archive__desc {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 共建生态 ---------- */
.page-about .eco__layout {
  display: grid;
  gap: 28px;
}

.page-about .eco__body p {
  margin: 0 0 18px;
  max-width: 44ch;
}

.page-about .eco__body p:last-child {
  margin-bottom: 0;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  border: 1px solid var(--pa-line);
  background: rgba(200, 162, 74, .08);
  color: var(--bone);
}

/* ---------- 时间轴 ---------- */
.page-about .about-figure--tl {
  margin-bottom: 36px;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 4px 0 0 30px;
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(200, 162, 74, .12));
}

.page-about .tl__item {
  position: relative;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, .16);
}

.page-about .tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: .08em;
  color: var(--gold);
  text-decoration: none;
  margin-bottom: 8px;
}

.page-about .tl__card {
  padding: 18px 20px;
  border: 1px solid var(--pa-line-soft);
  border-radius: var(--r-md);
  background: var(--pa-panel);
}

.page-about .tl__card.is-pulse {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(200, 162, 74, .18);
}

.page-about .tl__title {
  margin: 0 0 8px;
  color: var(--bone);
}

.page-about .tl__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 52ch;
}

/* ---------- 团队环节 ---------- */
.page-about .cycle {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: cycle;
}

.page-about .cycle__item {
  position: relative;
  padding: 20px 22px 20px 66px;
  border: 1px solid var(--pa-line-soft);
  border-radius: var(--r-md);
  background: rgba(22, 32, 28, .66);
}

.page-about .cycle__num {
  position: absolute;
  left: 20px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  letter-spacing: .04em;
}

.page-about .cycle__title {
  margin: 0 0 8px;
  color: var(--bone);
}

.page-about .cycle__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  max-width: 50ch;
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence__grid {
  align-items: stretch;
  gap: 14px;
}

.page-about .cadence__card {
  height: 100%;
  border-radius: var(--r-md);
}

.page-about .cadence__card .card__num {
  font-family: var(--font-mono);
  letter-spacing: .08em;
  color: var(--neon);
}

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

/* ---------- 收束 ---------- */
.page-about .about-outro {
  padding-block: var(--pa-space);
  border-top: 1px solid var(--pa-line);
  background:
    radial-gradient(90% 120% at 50% 0%, rgba(200, 162, 74, .12), transparent 62%);
}

.page-about .about-outro__inner {
  text-align: left;
}

.page-about .about-outro__title {
  margin: 0 0 18px;
  max-width: 24ch;
}

.page-about .about-outro__inner p {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.78;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .archive__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .cycle__item:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

@media (min-width: 820px) {
  .page-about .tier-board {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-template-areas:
      "lead lead lead lead prov prov"
      "city city node node tags tags";
  }

  .page-about .eco__layout {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 36px;
  }

  .page-about .tl {
    padding-left: 0;
    grid-template-columns: 108px minmax(0, 1fr);
    column-gap: 28px;
    row-gap: 22px;
    align-items: start;
  }

  .page-about .tl::before {
    left: 96px;
    top: 6px;
    bottom: 6px;
  }

  .page-about .tl__item {
    display: contents;
  }

  .page-about .tl__year {
    grid-column: 1;
    justify-self: end;
    margin-bottom: 0;
    padding-top: 14px;
    text-align: right;
  }

  .page-about .tl__card {
    grid-column: 2;
  }

  .page-about .tl__item::before {
    display: none;
  }

  .page-about .tl__card {
    position: relative;
  }

  .page-about .tl__card::before {
    content: "";
    position: absolute;
    left: -24px;
    top: 24px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 0 4px rgba(200, 162, 74, .16);
  }
}

@media (min-width: 1040px) {
  .page-about .archive__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

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

  .page-about .cycle__item:last-child:nth-child(odd) {
    grid-column: auto;
  }

  .page-about .about-hero__title {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card,
  .page-about .cycle__item,
  .page-about .archive__cell {
    transition: none;
  }
}