.page-about {
  --about-measure: 62ch;
  --about-chapter-gap: clamp(72px, 11vw, 132px);
  display: block;
  padding-bottom: clamp(48px, 7vw, 90px);
}

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(40px, 7vw, 84px);
}

.page-about .about-lead .breadcrumbs {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-lead__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-lead__title {
  margin: 0 0 22px;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-size: clamp(31px, 6.2vw, 58px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-lead__text {
  margin: 0 0 clamp(30px, 5vw, 48px);
  max-width: var(--about-measure);
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(232, 238, 247, .84);
}

.page-about .about-lead__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 16px;
  margin: 0;
  padding: clamp(22px, 3.5vw, 32px) 0 0;
  border-top: 1px solid var(--ink-line);
  list-style: none;
}

.page-about .about-figure-item__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4.6vw, 42px);
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-figure-item__label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 布局：正文 + 章节目录 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 6vw, 68px);
}

.page-about .about-toc {
  padding: 16px 0;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
}

.page-about .about-toc__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: block;
  white-space: nowrap;
  padding: 8px 13px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--cyan);
  border-color: rgba(111, 233, 255, .5);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: var(--about-chapter-gap);
}

.page-about .about-chapter__head {
  position: relative;
  margin-bottom: clamp(22px, 3.5vw, 34px);
  padding-top: 20px;
}

.page-about .about-chapter__head::before {
  content: "";
  position: absolute;
  top: -18px;
  left: -18px;
  right: -18px;
  height: 128px;
  pointer-events: none;
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(111, 233, 255, .13), transparent 62%),
    radial-gradient(90% 100% at 92% 14%, rgba(255, 107, 44, .1), transparent 66%);
}

.page-about .about-chapter__no {
  position: relative;
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-chapter__title {
  position: relative;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1.32;
  color: var(--paper);
}

.page-about .about-chapter p {
  margin: 0 0 1.15em;
  max-width: var(--about-measure);
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(232, 238, 247, .84);
}

.page-about .about-chapter a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 233, 255, .35);
  transition: border-color .24s var(--ease), color .24s var(--ease);
}

.page-about .about-chapter a:hover,
.page-about .about-chapter a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 玻璃旁注 ---------- */
.page-about .about-note {
  margin: 26px 0 30px auto;
  max-width: 46ch;
  padding: 16px 18px;
  border: 1px solid rgba(111, 233, 255, .26);
  border-radius: 14px;
  background: var(--glass);
  backdrop-filter: blur(8px);
}

.page-about .about-note p {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 数据落点 ---------- */
.page-about .about-drop {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: 18px;
  border-top: 1px solid var(--ink-line);
}

.page-about .about-drop__num {
  font-family: var(--font-num);
  font-size: clamp(38px, 7vw, 58px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--heat);
  font-variant-numeric: tabular-nums;
}

.page-about .about-drop__text {
  flex: 1 1 16em;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 10px 0 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(111, 233, 255, .9), rgba(111, 233, 255, .06));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .about-timeline__node {
  position: absolute;
  left: -24px;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-deep);
  transition: box-shadow .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-timeline__item--major .about-timeline__node {
  left: -26px;
  top: 5px;
  width: 15px;
  height: 15px;
  border-color: var(--heat);
}

.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__item:focus-within .about-timeline__node {
  box-shadow: 0 0 0 7px rgba(111, 233, 255, .12);
}

.page-about .about-timeline__season {
  margin: 0 0 6px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-timeline__item--major .about-timeline__season {
  color: var(--heat);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.78;
  color: rgba(232, 238, 247, .78);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(24px, 4vw, 38px) 0;
}

.page-about .about-team__item {
  padding: 20px 18px;
  border: 1px solid var(--ink-line);
  border-radius: 14px;
  background: var(--glass);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-team__item:hover {
  transform: translateY(-2px);
  border-color: rgba(111, 233, 255, .45);
}

.page-about .about-team__num {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 34px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__role {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-team__desc {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 插图 ---------- */
.page-about .about-figure {
  margin: clamp(24px, 4vw, 40px) 0;
}

.page-about .about-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--ink-line);
  border-radius: 16px;
  background: var(--ink-base);
}

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

.page-about .about-figure__caption {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 结尾状态带 ---------- */
.page-about .about-outro {
  margin-top: clamp(56px, 9vw, 116px);
  border-top: 1px solid var(--ink-line);
  background: linear-gradient(115deg, rgba(111, 233, 255, .09), rgba(255, 107, 44, .07) 58%, rgba(185, 168, 255, .06));
}

.page-about .about-outro__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px 34px;
  padding: clamp(34px, 6vw, 62px) 0;
}

.page-about .about-outro__text {
  margin: 0;
  max-width: 34ch;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.5;
  color: var(--paper);
}

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

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

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 62ch) minmax(176px, 220px);
    justify-content: center;
    gap: clamp(48px, 6vw, 92px);
  }

  .page-about .about-body {
    order: 1;
  }

  .page-about .about-toc {
    order: 2;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    padding: 4px 0 4px 18px;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--ink-line);
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
    margin-top: 12px;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-toc__link {
    position: relative;
    padding: 7px 0 7px 15px;
    border: 0;
    border-radius: 0;
    white-space: normal;
    font-size: 13.5px;
    line-height: 1.5;
  }

  .page-about .about-toc__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--ink-line);
    transform: translateY(-50%);
    transition: background .24s var(--ease);
  }

  .page-about .about-toc__link:hover::before,
  .page-about .about-toc__link:focus-visible::before {
    background: var(--cyan);
  }

  .page-about .about-note {
    margin-right: 6%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-team__item,
  .page-about .about-timeline__node {
    transition: none;
  }

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