.page-about .about-crumbs {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 72px) clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 0%, rgba(255, 122, 26, 0.09), transparent 48%),
    linear-gradient(180deg, rgba(30, 122, 76, 0.07), transparent 72%);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(90px, 22vw, 260px);
  height: 5px;
  background: linear-gradient(90deg, var(--turf), var(--flood));
}
.page-about .about-hero__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}
.page-about .about-hero h1 {
  margin: 0;
  max-width: 16ch;
}
.page-about .about-hero .lede {
  max-width: 62ch;
  margin: 0;
}
.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(8px, 2vw, 18px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero__stats li {
  background: var(--paper);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-hero__stats .num {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--turf-ink);
  letter-spacing: -0.01em;
}
.page-about .about-hero__stats span:last-child {
  font-size: 13px;
  color: var(--tactic);
  letter-spacing: 0.02em;
}

/* ---------- 双栏主体 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(36px, 6vw, 96px) clamp(48px, 7vw, 110px);
}

/* ---------- 目录索引 ---------- */
.page-about .about-index {
  min-width: 0;
}
.page-about .about-index__label {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--tactic);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  border-top: 1px solid var(--line);
}
.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__item {
  flex: 0 0 auto;
}
.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px 12px 0;
  font-size: 14px;
  color: var(--night);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--turf);
  letter-spacing: 0.06em;
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--flood);
  border-bottom-color: var(--flood);
  outline: none;
}
.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--flood);
  outline-offset: 2px;
}

/* ---------- 内容区 ---------- */
.page-about .about-content {
  min-width: 0;
}
.page-about .about-section {
  padding-block: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 88px;
}
.page-about .about-section:first-child {
  border-top: none;
  padding-top: 0;
}
.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
  flex-wrap: wrap;
}
.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--flood);
  padding-top: 6px;
}
.page-about .about-section__head h2 {
  margin: 0;
  max-width: 24ch;
  color: var(--night);
}
.page-about .about-copy {
  margin: 0 0 1.15em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--night);
  max-width: 66ch;
}
.page-about .about-copy:last-child {
  margin-bottom: 0;
}
.page-about .about-copy a {
  color: var(--turf-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}
.page-about .about-copy a:hover,
.page-about .about-copy a:focus-visible {
  color: var(--flood);
}
.page-about .about-copy--note {
  margin-top: 1.2em;
  font-size: 14px;
  color: var(--tactic);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-version {
  position: relative;
  padding: 20px 22px 22px;
  background: linear-gradient(160deg, rgba(14, 59, 41, 0.95) 0%, rgba(11, 31, 58, 0.96) 100%);
  color: var(--paper);
  border-left: 3px solid var(--turf);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-version:hover,
.page-about .about-version:focus-within {
  border-left-color: var(--flood);
  transform: translateX(3px);
}
.page-about .about-version__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.page-about .about-version__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  background: var(--turf);
  color: var(--paper);
}
.page-about .about-version__tag--current {
  background: var(--flood);
  color: var(--night);
  font-weight: 700;
}
.page-about .about-version__season {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--flood-soft);
}
.page-about .about-version__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-version__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-deep);
  max-width: 62ch;
}

/* ---------- 团队分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}
.page-about .about-split .about-figure {
  margin: 0;
}
.page-about .about-split__text {
  min-width: 0;
}
.page-about .about-facts {
  list-style: none;
  margin: clamp(18px, 2.5vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-facts li {
  background: var(--paper);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 13px;
  color: var(--tactic);
}
.page-about .about-facts .num {
  font-size: 19px;
  font-weight: 700;
  color: var(--turf-ink);
  letter-spacing: -0.01em;
}

/* ---------- 合作标签 ---------- */
.page-about .about-tags {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 数据面板 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(16px, 2.4vw, 24px);
}
.page-about .about-stats .stat {
  background: var(--paper);
  padding: clamp(16px, 2.4vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .about-stats .stat__num {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--night);
  letter-spacing: -0.02em;
}
.page-about .about-stats .stat__label {
  font-size: 13px;
  color: var(--tactic);
  letter-spacing: 0.02em;
}

/* ---------- 收尾动作 ---------- */
.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 519px) {
  .page-about .about-hero__stats,
  .page-about .about-facts,
  .page-about .about-stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-version {
    padding: 18px 16px 20px;
  }
  .page-about .about-version:hover,
  .page-about .about-version:focus-within {
    transform: none;
  }
}

/* ---------- 桌面：左窄右宽画册结构 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(40px, 4.5vw, 80px);
  }
  .page-about .about-index {
    position: sticky;
    top: 40px;
    align-self: start;
  }
  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    border-top: 1px solid var(--line);
  }
  .page-about .about-index__item {
    flex: 1 1 auto;
  }
  .page-about .about-index__link {
    padding: 11px 12px 11px 12px;
    border-bottom: none;
    border-left: 2px solid transparent;
    font-size: 14px;
  }
  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--flood);
    border-bottom-color: transparent;
    background: rgba(30, 122, 76, 0.06);
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 3vw, 48px);
  }
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-timeline {
    gap: 16px;
  }
}
<<<END>>>