.page-about {
  --about-gap: clamp(20px, 3.2vw, 40px);
  --about-line: rgba(212, 175, 55, .38);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(12px, 2vw, 24px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 7vw, 64px);
  line-height: 1.06;
  letter-spacing: -.025em;
  margin: 16px 0 0;
  max-width: 19ch;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  color: var(--cream-70);
  max-width: 60ch;
}

.page-about .about-hero__chips {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__media {
  margin: clamp(30px, 4.5vw, 52px) 0 0;
}

/* ---------- 非对称双栏骨架 ---------- */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-split__side {
  max-width: 46ch;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 4px 0 0;
  padding: 0 0 0 32px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--violet) 48%, var(--neon) 100%);
  opacity: .55;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 38px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 5px rgba(212, 175, 55, .12);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--neon);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(63, 224, 208, .1);
  border: 1px solid rgba(63, 224, 208, .28);
  margin-bottom: 10px;
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.4vw, 21px);
  line-height: 1.35;
  margin: 0 0 8px;
  letter-spacing: -.01em;
}

.page-about .about-timeline__body p {
  margin: 0;
  color: var(--cream-70);
  max-width: 56ch;
}

/* ---------- 内容分区标签页 ---------- */
.page-about .about-tabs {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-tabs__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-tabs__tab {
  flex: 0 0 auto;
  white-space: nowrap;
}

.page-about .about-tabs__panel {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(22px, 3.2vw, 34px);
  border-radius: var(--radius-xl);
  background: linear-gradient(155deg, rgba(31, 74, 58, .68) 0%, rgba(42, 47, 46, .72) 100%);
  border: 1px solid var(--cream-12);
}

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

.page-about .about-tabs__h {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 23px);
  line-height: 1.35;
  margin: 0 0 12px;
  letter-spacing: -.01em;
}

.page-about .about-tabs__panel > p {
  margin: 0;
  color: var(--cream-70);
  max-width: 60ch;
}

.page-about .about-tabs__list-items {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-tabs__list-items li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--cream-70);
  font-size: 15px;
}

.page-about .about-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  transform: translateY(-2px);
}

.page-about .about-tabs__more {
  margin: 20px 0 0;
  font-size: 15px;
}

.page-about .about-tabs__more a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-40);
  padding-bottom: 2px;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-tabs__more a:hover,
.page-about .about-tabs__more a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
}

/* ---------- 积分体系 ---------- */
.page-about .about-points__copy > p {
  margin: 18px 0 0;
  color: var(--cream-70);
  max-width: 58ch;
}

.page-about .about-points__cards {
  margin-top: clamp(22px, 3vw, 30px);
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-points__card {
  padding: 20px 20px 22px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(11, 43, 38, .92), rgba(17, 22, 20, .92));
  border: 1px solid var(--gold-40);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-points__card:hover,
.page-about .about-points__card:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-panel);
}

.page-about .about-points__figure {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-points__label {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--cream);
}

.page-about .about-points__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cream-45);
  transition: color .3s var(--ease);
}

.page-about .about-points__card:hover .about-points__note,
.page-about .about-points__card:focus-within .about-points__note {
  color: var(--cream-70);
}

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

/* ---------- 团队与支持 ---------- */
.page-about .about-team__copy > p {
  margin: 18px 0 0;
  color: var(--cream-70);
  max-width: 56ch;
}

.page-about .about-team__contact {
  margin: clamp(22px, 3vw, 28px) 0 0;
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  background: rgba(243, 239, 230, .05);
  border-left: 3px solid var(--clay);
  display: grid;
  gap: 14px;
}

.page-about .about-team__row {
  display: grid;
  gap: 4px;
}

.page-about .about-team__row dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cream-45);
}

.page-about .about-team__row dd {
  margin: 0;
  font-family: var(--font-num);
  font-size: 15px;
  word-break: break-word;
  color: var(--cream);
}

.page-about .about-team__row dd a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, .35);
}

.page-about .about-team__row dd a:hover,
.page-about .about-team__row dd a:focus-visible {
  color: var(--gold);
  border-color: var(--gold-40);
}

.page-about .about-team__hint {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-45);
  max-width: 52ch;
}

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

/* ---------- 更新节奏 ---------- */
.page-about .about-commit__grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-commit__item {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--radius-lg);
  background: rgba(31, 74, 58, .34);
  overflow: hidden;
}

.page-about .about-commit__item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  border-radius: 4px;
}

.page-about .about-commit__item--gold::before {
  background: linear-gradient(180deg, var(--gold), rgba(212, 175, 55, .2));
}

.page-about .about-commit__item--neon::before {
  background: linear-gradient(180deg, var(--neon), rgba(63, 224, 208, .2));
}

.page-about .about-commit__item--clay::before {
  background: linear-gradient(180deg, var(--amber), rgba(255, 138, 61, .2));
}

.page-about .about-commit__kicker {
  margin: 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cream-45);
}

.page-about .about-commit__item h3 {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.3vw, 20px);
  letter-spacing: -.01em;
}

.page-about .about-commit__item p {
  margin: 0;
  color: var(--cream-70);
  font-size: 15px;
}

/* ---------- 收束 ---------- */
.page-about .about-cta__panel {
  padding: clamp(26px, 4vw, 46px);
  border-radius: var(--radius-xl);
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.15;
  letter-spacing: -.02em;
}

.page-about .about-cta__text p {
  margin: 14px 0 0;
  color: var(--cream-70);
  max-width: 54ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

@media (min-width: 900px) {
  .page-about .about-split--aside {
    grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split--aside-rev {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 400px);
    align-items: center;
  }

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 320px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__lede {
    font-size: 17px;
  }
}

@media (max-width: 480px) {
  .page-about .about-timeline {
    padding-left: 26px;
  }

  .page-about .about-timeline__item::before {
    left: -26px;
    width: 12px;
    height: 12px;
    box-shadow: 0 0 0 4px rgba(212, 175, 55, .12);
  }

  .page-about .about-tabs__panel {
    padding: 20px 18px;
  }

  .page-about .about-cta__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-points__card,
  .page-about .about-points__note,
  .page-about .about-tabs__more a {
    transition: none;
  }

  .page-about .about-points__card:hover {
    transform: none;
  }
}