.page-about {
  --about-num-size: clamp(52px, 10vw, 128px);
  --about-gap: clamp(32px, 5vw, 88px);
  background: var(--night-pitch);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4vw, 52px) clamp(44px, 7vw, 96px);
  overflow: hidden;
}

.page-about .about-hero__slab {
  position: absolute;
  top: -24%;
  right: -14%;
  width: min(760px, 84vw);
  height: min(760px, 84vw);
  background: var(--sheen);
  clip-path: polygon(22% 0, 100% 0, 100% 78%, 0 100%);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: end;
}

.page-about .about-hero__copy .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(31px, 6.2vw, 72px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 46em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stats > div {
  background: rgba(13, 46, 34, 0.86);
  padding: 16px 14px 18px;
}

.page-about .about-hero__stats dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-hero__stats dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-hero__unit {
  font-family: var(--font-sans);
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--lime);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(44px, 6.5vw, 104px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--about-num-size);
  line-height: 0.78;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-strong);
  margin-bottom: clamp(8px, 1.4vw, 18px);
}

.page-about .about-section h2 {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.015em;
  max-width: 22em;
}

.page-about .about-section__lead {
  margin: clamp(12px, 1.8vw, 20px) 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-section__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 56px);
  align-items: start;
}

.page-about .about-section__body p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.78;
  color: var(--silver);
}

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

/* ---------- 要点列表 ---------- */
.page-about .about-points {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}

.page-about .about-points li {
  position: relative;
  padding: 11px 0 11px 22px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 11px;
  height: 1px;
  background: var(--lime);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(28px, 4vw, 56px) 0 0;
}

.page-about .about-figure--tight {
  margin-top: clamp(28px, 4vw, 48px);
}

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

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: clamp(24px, 3.6vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .timeline__item {
  position: relative;
  padding: 20px 4px 22px 34px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .timeline__item:first-child::before {
  top: 26px;
}

.page-about .timeline__item:last-child::before {
  bottom: auto;
  height: 26px;
}

.page-about .timeline__item::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 28px;
  width: 9px;
  height: 9px;
  background: var(--night-pitch);
  border: 1px solid var(--silver);
  transform: rotate(45deg);
}

.page-about .timeline__item--now::after {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .timeline__year {
  display: block;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-about .timeline__item:not(.timeline__item--now) .timeline__year {
  color: var(--silver);
}

.page-about .timeline__title {
  margin: 10px 0 0;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.45;
  font-weight: 700;
}

.page-about .timeline__more {
  margin-top: 8px;
}

.page-about .timeline__more summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--lime);
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(215, 255, 63, 0.34);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .timeline__more summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
}

.page-about .timeline__more[open] summary {
  color: var(--silver);
  border-color: var(--line-strong);
}

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

.page-about .timeline__more p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 36em;
}

/* ---------- 团队（纸白区块） ---------- */
.page-about .about-section--paper {
  background: var(--paper);
  color: var(--ink);
  border-top: none;
}

.page-about .about-section--paper .about-num {
  -webkit-text-stroke: 1px rgba(16, 34, 27, 0.28);
}

.page-about .about-section--paper .about-section__lead {
  color: rgba(16, 34, 27, 0.66);
}

.page-about .team {
  position: relative;
  margin-top: clamp(24px, 3.6vw, 44px);
}

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

.page-about .team__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .team__chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  font-size: 13px;
  line-height: 1;
  color: var(--ink);
  border: 1px solid rgba(16, 34, 27, 0.22);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .team__chip:hover {
  border-color: var(--ink);
}

.page-about #role-all:checked ~ .team__filter label[for="role-all"],
.page-about #role-editor:checked ~ .team__filter label[for="role-editor"],
.page-about #role-writer:checked ~ .team__filter label[for="role-writer"],
.page-about #role-checker:checked ~ .team__filter label[for="role-checker"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.page-about #role-editor:checked ~ .team__list .team__card:not([data-role="editor"]),
.page-about #role-writer:checked ~ .team__list .team__card:not([data-role="writer"]),
.page-about #role-checker:checked ~ .team__list .team__card:not([data-role="checker"]) {
  display: none;
}

.page-about .team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(16, 34, 27, 0.16);
  border: 1px solid rgba(16, 34, 27, 0.16);
}

.page-about .team__card {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  grid-template-areas:
    "count role"
    "count duty";
  gap: 6px 18px;
  padding: 22px 18px;
  background: var(--paper);
}

.page-about .team__count {
  grid-area: count;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 50px);
  line-height: 1;
  font-weight: 700;
  color: #0d2e22;
}

.page-about .team__role {
  grid-area: role;
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .team__duty {
  grid-area: duty;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(16, 34, 27, 0.76);
}

/* ---------- 球迷网络 ---------- */
.page-about .about-network {
  padding-bottom: 0;
}

.page-about .about-network__figures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-network__figures > div {
  flex: 1 1 110px;
  padding: 14px 16px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-network__figures .data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-network__figures i {
  font-style: normal;
  font-size: 0.5em;
  color: var(--lime);
  margin-left: 1px;
}

.page-about .about-network__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-band {
  margin: clamp(30px, 4vw, 56px) 0 0;
  position: relative;
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 19, 0.86) 0%, rgba(6, 26, 19, 0.1) 42%, rgba(6, 26, 19, 0.92) 100%);
  pointer-events: none;
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: clamp(180px, 30vw, 380px);
  max-width: 100%;
  object-fit: cover;
  object-position: center;
}

/* ---------- 共建 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(24px, 3.6vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-partners__item {
  padding: 22px 4px;
  background: var(--night-pitch);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-partners__num i {
  font-style: normal;
  font-size: 0.55em;
  color: var(--silver);
  margin: 0 2px;
}

.page-about .about-partners__item h3 {
  margin: 10px 0 0;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.5;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-partners__item p {
  margin: 8px 0 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-links__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--stand-green);
  color: var(--paper);
  text-decoration: none;
  transition: background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-links__card:hover,
.page-about .about-links__card:focus-visible {
  background: var(--cold-slate);
  transform: translateX(3px);
}

.page-about .about-links__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .about-links__title {
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 700;
  line-height: 1.45;
}

/* ---------- 看台开放日 ---------- */
.page-about .about-open {
  background: linear-gradient(160deg, #11362a 0%, #0d2e22 46%, #061a13 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-open__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 56px);
  align-items: start;
}

.page-about .about-open__copy p {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-open__copy .btn {
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .about-open__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-open__list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-open__tag {
  justify-self: start;
  margin-top: 2px;
}

.page-about .about-open__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  border-top: 1px solid var(--line-strong);
  padding-block: clamp(40px, 6vw, 84px);
}

.page-about .about-cta__inner h2 {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.015em;
  max-width: 20em;
}

.page-about .about-cta__inner p {
  margin: 14px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 2.8vw, 30px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-partners__item {
    padding: 26px 18px;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(270px, 0.6fr);
    gap: clamp(32px, 4vw, 64px);
  }

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

  .page-about .about-section__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(28px, 4vw, 72px);
  }

  .page-about .about-open__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .team__card {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 1.2fr);
    grid-template-areas: "count role duty";
    align-items: start;
    padding: 26px 24px;
    gap: 8px 28px;
  }

  .page-about .team__count {
    font-size: clamp(44px, 5.4vw, 64px);
  }

  .page-about .team__duty {
    font-size: 15px;
  }

  /* 时间轴转为横向刻度 */
  .page-about .timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-top: 1px solid var(--line-strong);
  }

  .page-about .timeline__item {
    padding: 48px 18px 8px 0;
  }

  .page-about .timeline__item::before {
    left: 0;
    right: 0;
    top: 26px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .timeline__item:first-child::before,
  .page-about .timeline__item:last-child::before {
    top: 26px;
    bottom: auto;
    height: 1px;
  }

  .page-about .timeline__item::after {
    left: 0;
    top: 22px;
  }

  .page-about .timeline__more p {
    font-size: 14px;
  }
}

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

  .page-about .about-links__card:hover,
  .page-about .about-links__card:focus-visible {
    transform: none;
  }
}