.page-about {
  --ab-tl-pad: clamp(18px, 3vw, 36px);
  --ab-on-paper: #1B2A23;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .ab-sep {
  color: var(--grid);
  margin: 0 8px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(28px, 4vw, 56px) 0 clamp(36px, 5vw, 72px);
  border-bottom: 1px solid var(--grid);
  background-image:
    linear-gradient(180deg, rgba(200, 255, 61, .055), rgba(11, 31, 26, 0) 62%),
    repeating-linear-gradient(90deg, var(--grid-soft) 0 1px, transparent 1px 76px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .ab-eyebrow {
  margin: 0;
  color: var(--lime-soft);
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.2vw, 66px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .ab-hero__lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-hero__side {
  border-top: 1px solid var(--grid);
  padding-top: 16px;
}

.page-about .ab-hero__side-tag {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .ab-facts {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-about .ab-facts__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--grid);
}

.page-about .ab-facts__item:last-child {
  border-bottom: 0;
}

.page-about .ab-facts dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: .02em;
}

.page-about .ab-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-facts__unit {
  margin-left: 3px;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--lime-soft);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-section {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-section--last {
  border-bottom: 0;
  padding-bottom: clamp(52px, 7vw, 104px);
}

.page-about .ab-sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 4px 18px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .ab-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 104px);
  line-height: .82;
  font-weight: 700;
  color: var(--grid);
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
  user-select: none;
}

.page-about .ab-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 42px);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--text);
}

.page-about .ab-sec-lead {
  grid-column: 2;
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .ab-sec-head {
    grid-template-columns: clamp(90px, 13vw, 190px) minmax(0, 1fr);
    gap: 6px 28px;
  }
  .page-about .ab-sec-lead {
    max-width: 66ch;
  }
}

/* ---------- 01 时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--ab-tl-pad);
  border-left: 1px solid var(--grid);
}

.page-about .ab-tl {
  position: relative;
  display: grid;
  gap: 8px;
  padding-bottom: clamp(30px, 4.5vw, 54px);
}

.page-about .ab-tl:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--ab-tl-pad) - 5px);
  top: 10px;
  width: 9px;
  height: 9px;
  background: var(--lime);
}

.page-about .ab-tl--turn::before {
  background: var(--orange);
}

.page-about .ab-tl__meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .ab-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__body h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .ab-tl__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .ab-tl {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0 44px;
    align-items: start;
  }
  .page-about .ab-tl__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 2px;
  }
}

/* ---------- 02 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-team__item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  background: var(--ink);
}

.page-about .ab-team__icon {
  width: 28px;
  height: 28px;
  margin-top: 4px;
  color: var(--lime);
}

.page-about .ab-team__item h3 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.page-about .ab-team__item p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--grid);
}

.page-about .ab-team__media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 03 流程带 ---------- */
.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .ab-flow__step {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 20px 18px 16px;
  background: var(--panel);
  outline: 1px solid transparent;
  outline-offset: -1px;
  transition: background-color .16s ease, outline-color .16s ease;
}

.page-about .ab-flow__step:hover,
.page-about .ab-flow__step:focus-within {
  background: var(--panel-2);
  outline-color: var(--lime);
}

.page-about .ab-flow__n {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .ab-flow__step h3 {
  margin: 0;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-flow__time {
  margin-top: 4px;
  padding-top: 9px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--orange);
}

@media (min-width: 800px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 03 附：暖纸强调块 ---------- */
.page-about .ab-quote {
  margin-top: clamp(24px, 3.5vw, 40px);
  padding: 22px 24px;
  background: var(--paper);
  border-left: 4px solid var(--lime);
}

.page-about .ab-quote p {
  margin: 0;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-on-paper);
}

/* ---------- 04 赛事与地区 ---------- */
.page-about .ab-band {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .ab-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--grid);
}

.page-about .ab-band--narrow img {
  aspect-ratio: 10 / 7;
}

.page-about .ab-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-cols__cell h3 {
  margin: 0 0 10px;
  padding-top: 14px;
  border-top: 2px solid var(--lime);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}

.page-about .ab-cols__cell p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-cols__cell a {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-color: var(--lime-line);
  text-underline-offset: 3px;
}

.page-about .ab-cols__cell a:hover {
  text-decoration-color: var(--lime);
}

@media (min-width: 820px) {
  .page-about .ab-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .page-about .ab-cols__cell:first-child {
    padding-right: clamp(12px, 2vw, 32px);
    border-right: 1px solid var(--grid);
  }
}

/* ---------- 05 年度回顾 ---------- */
.page-about .ab-annual__lead {
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .ab-annual__item {
  display: grid;
  align-content: start;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--panel);
}

.page-about .ab-annual__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .ab-annual__item h3 {
  margin: 0;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
}

.page-about .ab-annual__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--lime);
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lime-soft);
}

@media (min-width: 640px) {
  .page-about .ab-annual {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .ab-annual {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 06 协作 ---------- */
.page-about .ab-cta__grid {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .ab-cta__card {
  padding: 22px 20px 24px;
  background: var(--panel);
  transition: background-color .16s ease;
}

.page-about .ab-cta__card:hover {
  background: var(--panel-2);
}

.page-about .ab-cta__card h3 {
  margin: 0 0 9px;
  font-size: 18px;
  font-weight: 600;
  color: var(--lime);
}

.page-about .ab-cta__card p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .ab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.5vw, 38px);
}

@media (min-width: 780px) {
  .page-about .ab-cta__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 通用收尾 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-flow__step,
  .page-about .ab-cta__card {
    transition: none;
  }
}