.page-about {
  --ab-gutter: clamp(18px, 4vw, 56px);
  color: var(--body-text);
  position: relative;
}

/* ---------- 通用排版件 ---------- */
.page-about .ab-title {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--white);
  font-size: clamp(28px, 5.2vw, 52px);
  margin: 10px 0 0;
}

.page-about .ab-sechead {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(18px, 2.4vw, 30px);
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .ab-sechead__note {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--muted);
  max-width: 52ch;
}

.page-about .ab-vlabel {
  display: none;
}

@media (min-width: 1180px) {
  .page-about .ab-sechead {
    padding-left: 46px;
  }
  .page-about .ab-vlabel {
    display: block;
    position: absolute;
    left: 0;
    top: 4px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32em;
    color: var(--cyan);
    text-transform: uppercase;
    border-left: 1px solid var(--line);
    padding-left: 8px;
  }
}

.page-about .ab-fig {
  margin: clamp(30px, 4.4vw, 56px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  position: relative;
  overflow: hidden;
}

.page-about .ab-fig--wide { max-width: 100%; }
.page-about .ab-fig--mid { max-width: 100%; }

.page-about .ab-fig::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(30, 42, 71, 0.5) 79px 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(30, 42, 71, 0.5) 79px 80px);
  opacity: 0.55;
}

.page-about .ab-fig .ht-media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-fig--wide .ht-media__img { aspect-ratio: 2 / 1; }
.page-about .ab-fig--mid .ht-media__img { aspect-ratio: 3 / 2; }
.page-about .ab-fig--dots .ht-media__img { aspect-ratio: 4 / 3; }

.page-about .ab-fig .ht-media__cap {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 7vw, 88px);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(0, 229, 208, 0.11), transparent 60%),
    radial-gradient(90% 70% at 6% 100%, rgba(255, 122, 41, 0.08), transparent 62%);
}

.page-about .ab-hero__wedge {
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(214deg, rgba(11, 18, 36, 0.95) 0 48%, transparent 48.1%);
  border-left: 1px solid var(--line);
  pointer-events: none;
}

.page-about .ab-hero .ht-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__stage {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.02;
  color: var(--white);
  font-size: clamp(34px, 8vw, 76px);
  margin: 12px 0 0;
}

.page-about .ab-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-hero__mark {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900));
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .ab-hero__mark-year {
  font-family: var(--font-mono);
  font-size: clamp(48px, 10vw, 84px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .ab-hero__mark-rule {
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 208, 0));
}

.page-about .ab-hero__mark-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .ab-hero__stage {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: end;
  }
  .page-about .ab-hero__mark {
    margin-bottom: 6px;
  }
}

/* ---------- 起点 ---------- */
.page-about .ab-origin__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 46px);
}

.page-about .ab-origin__body {
  max-width: 66ch;
}

.page-about .ab-origin__body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-about .ab-origin__body p:first-child {
  font-size: 17px;
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.5fr);
    gap: clamp(30px, 5vw, 76px);
    align-items: start;
  }
  .page-about .ab-origin__lead {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 演进时间线 ---------- */
.page-about .ab-evo__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-evo__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 55%, rgba(30, 42, 71, 0) 100%);
}

.page-about .ab-evo__item {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(26px, 3.4vw, 40px);
}

.page-about .ab-evo__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 280ms var(--ease), border-color 280ms var(--ease);
}

.page-about .ab-evo__item--open::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .ab-evo__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 34px);
  letter-spacing: -0.01em;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 10px;
}

.page-about .ab-evo__name {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 25px);
  font-weight: 700;
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-about .ab-evo__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
  max-width: 56ch;
}

.page-about .ab-evo__more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  border-left: 1px solid var(--line-soft);
  padding-left: 0;
  transition: max-height 420ms var(--ease), opacity 300ms var(--ease), padding-left 420ms var(--ease), margin-top 420ms var(--ease);
}

.page-about .ab-evo__item:hover .ab-evo__more,
.page-about .ab-evo__item:focus-within .ab-evo__more {
  max-height: 160px;
  opacity: 1;
  padding-left: 14px;
  margin-top: 12px;
}

@media (min-width: 900px) {
  .page-about .ab-evo__list::before {
    left: 27px;
  }
  .page-about .ab-evo__item {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    padding-left: 62px;
  }
  .page-about .ab-evo__item::before {
    left: 20px;
    top: 6px;
  }
  .page-about .ab-evo__year {
    margin-bottom: 0;
    text-align: right;
  }
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-team__card {
  background: var(--ink-800);
  border: 0;
  padding: clamp(22px, 3vw, 32px);
  transition: background 260ms var(--ease);
}

.page-about .ab-team__card:hover {
  background: var(--ink-700);
}

.page-about .ab-team__card .ht-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-about .ab-team__card .ht-card__title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--white);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.page-about .ab-team__card .ht-card__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

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

.page-about .ab-team__list li {
  position: relative;
  padding: 11px 0 11px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 6px;
  height: 1px;
  background: var(--orange);
}

@media (min-width: 860px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .ab-cov__panel {
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-cov__live {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .ab-cov__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-about .ab-cov__item {
  background: var(--ink-900);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 16px;
  padding: 16px 18px;
  border-left: 2px solid transparent;
  transition: border-color 260ms var(--ease), background 260ms var(--ease);
}

.page-about .ab-cov__item:hover {
  border-left-color: var(--cyan);
  background: var(--ink-700);
}

.page-about .ab-cov__item[hidden] {
  display: none;
}

.page-about .ab-cov__name {
  font-size: 16px;
  color: var(--white);
  font-weight: 600;
}

.page-about .ab-cov__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--orange);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .ab-cov__note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-cov__visual {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .ab-cov__visual .ab-fig {
  margin-top: 0;
}

.page-about .ab-cov__side {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-text);
  align-self: center;
  border-left: 1px solid var(--line);
  padding-left: 20px;
}

@media (min-width: 900px) {
  .page-about .ab-cov__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-cov__visual {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 赛季节奏 ---------- */
.page-about .ab-rhythm__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-rhythm__card {
  border: 0;
  background: var(--ink-900);
  padding: clamp(22px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-rhythm__card .ht-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 8px;
}

.page-about .ab-rhythm__num {
  font-family: var(--font-mono);
  font-size: clamp(52px, 11vw, 86px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--cyan);
}

.page-about .ab-rhythm__unit {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-family: var(--font-mono);
}

.page-about .ab-rhythm__card .ht-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-text);
}

@media (min-width: 860px) {
  .page-about .ab-rhythm__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 服务与协同 ---------- */
.page-about .ab-serve__grid {
  display: grid;
  gap: clamp(30px, 5vw, 72px);
}

.page-about .ab-serve__sub {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 27px);
  color: var(--white);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-serve__col p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-text);
  max-width: 58ch;
}

.page-about .ab-serve__dl {
  margin: 22px 0 18px;
  border-top: 1px solid var(--line);
}

.page-about .ab-serve__row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-serve__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-top: 2px;
}

.page-about .ab-serve__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--white);
  word-break: break-word;
}

.page-about .ab-serve__row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 208, 0.35);
}

.page-about .ab-serve__row dd a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .ab-serve__hint {
  font-size: 14px !important;
  color: var(--muted) !important;
}

.page-about .ab-serve__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-serve__list li {
  position: relative;
  padding: 13px 0 13px 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--body-text);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-serve__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 8px;
  height: 1px;
  background: var(--violet);
}

.page-about .ab-serve__col .ht-btn {
  margin-top: 6px;
}

@media (min-width: 900px) {
  .page-about .ab-serve__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-evo__more,
  .page-about .ab-evo__item::before,
  .page-about .ab-team__card,
  .page-about .ab-cov__item {
    transition: none !important;
  }
}
</main>