.page-about {
  --about-rail: 88px;
  color: var(--paper);
}

.page-about .breadcrumb {
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  margin-top: clamp(18px, 3vw, 34px);
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__text {
  max-width: 60ch;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.78;
  color: var(--paper-88);
}

.page-about .about-hero__body {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .hero-facts {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--mist-25);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
}

.page-about .hero-facts__item {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-about .hero-facts__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1;
  color: var(--amber);
}

.page-about .hero-facts__cap {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--mist-25);
  border-radius: var(--radius);
  background: var(--glass);
}

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

.page-about .about-hero__figure img {
  aspect-ratio: 16 / 10;
}

.page-about .about-columns__figure img {
  aspect-ratio: 4 / 3;
}

.page-about .about-team__figure img {
  aspect-ratio: 3 / 2;
}

.page-about .media-frame__caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(6, 18, 30, 0.5);
  border-top: 1px solid var(--mist-14);
}

/* ---------- 通用小节头 ---------- */
.page-about .about-section {
  margin-top: clamp(56px, 9vw, 104px);
}

.page-about .about-section__head {
  max-width: 54ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-section h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-section__lead {
  margin: 14px 0 0;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 命名 ---------- */
.page-about .about-naming__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-naming__text p {
  margin: 0 0 15px;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--paper-70);
}

.page-about .about-naming__text p:last-child {
  margin-bottom: 0;
}

.page-about .margin-note {
  padding: 22px 20px;
  border: 1px solid var(--mist-25);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(28, 58, 85, 0.92), rgba(16, 42, 67, 0.72));
}

.page-about .margin-note__quote {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.5;
  color: var(--amber-soft);
  text-decoration: underline;
  text-decoration-color: var(--amber-soft);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.page-about .margin-note__src {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .margin-note__extra {
  margin: 12px 0 0;
  max-height: 6em;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-70);
  opacity: 1;
  transition: max-height 0.24s var(--ease), opacity 0.24s var(--ease);
}

/* ---------- 年份轨道 ---------- */
.page-about .about-years {
  margin-top: clamp(56px, 9vw, 104px);
  padding-block: clamp(36px, 6vw, 68px);
  background: var(--ink-night);
  border-top: 1px solid var(--mist-14);
  border-bottom: 1px solid var(--mist-14);
}

.page-about .about-years__inner {
  display: grid;
  gap: 10px;
}

.page-about .year-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .year-rail__node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--mist-25);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 14px;
  text-decoration: none;
  color: var(--mist);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .year-rail__node:hover,
.page-about .year-rail__node:focus-visible {
  color: var(--paper);
  border-color: var(--amber);
  background: rgba(224, 168, 60, 0.1);
}

.page-about .year-rail__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.page-about .year-stage {
  padding: clamp(18px, 3vw, 26px) 0;
  border-top: 1px solid var(--mist-14);
  scroll-margin-top: 110px;
}

.page-about .year-stage:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .year-stage__year {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .year-stage__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .year-stage__body p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--paper-70);
}

/* ---------- 四栏目 ---------- */
.page-about .col-cards {
  display: grid;
  gap: 14px;
}

.page-about .col-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 18px;
  border: 1px solid var(--mist-25);
  border-radius: var(--radius);
  background: rgba(28, 58, 85, 0.5);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .col-card:hover,
.page-about .col-card:focus-visible {
  border-color: var(--amber);
  background: rgba(28, 58, 85, 0.88);
  transform: translateY(-2px);
}

.page-about .col-card__no {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .col-card__name {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .col-card__lead {
  flex: 1 1 auto;
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .col-card__count {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--mist-14);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--paper-70);
  transition: color 0.2s var(--ease);
}

.page-about .col-card:hover .col-card__count,
.page-about .col-card:focus-visible .col-card__count {
  color: var(--amber-soft);
}

.page-about .about-columns__figure {
  margin-top: clamp(26px, 4vw, 46px);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-team__text p {
  margin: 0 0 16px;
  max-width: 60ch;
  line-height: 1.85;
  color: var(--paper-70);
}

.page-about .roster {
  list-style: none;
  margin: 20px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .roster__item {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 12px 14px;
  border: 1px solid var(--mist-14);
  border-radius: var(--radius);
  background: rgba(16, 42, 67, 0.62);
}

.page-about .roster__n {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1;
  color: var(--amber-soft);
}

.page-about .roster__role {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--mist-25);
}

.page-about .cadence__item {
  padding: 18px 0;
  border-bottom: 1px solid var(--mist-14);
}

.page-about .cadence__when {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .cadence__what {
  margin: 0;
  max-width: 62ch;
  line-height: 1.8;
  color: var(--paper-70);
}

/* ---------- 四个理由 ---------- */
.page-about .reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .reason {
  padding-top: 18px;
  border-top: 1px solid var(--mist-25);
}

.page-about .reason__no {
  display: block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .reason__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--paper);
}

.page-about .reason__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 尾栏 ---------- */
.page-about .about-cta {
  margin-top: clamp(56px, 9vw, 104px);
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--mist-25);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(28, 58, 85, 0.78), rgba(11, 27, 43, 0.9));
}

.page-about .about-cta h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 56ch;
  line-height: 1.85;
  color: var(--paper-70);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-cta__back {
  margin: 18px 0 0;
  font-size: 13px;
}

.page-about .about-cta__back a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--mist-25);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .col-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .year-stage {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 40px);
    align-items: start;
  }

  .page-about .year-stage__year {
    margin: 0;
  }

  .page-about .cadence__item {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 40px);
    align-items: baseline;
  }

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

  .page-about .reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 44px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-naming__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .margin-note {
    margin-top: 32px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-top: 18px;
  }

  .page-about .about-years__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(26px, 4vw, 52px);
    align-items: start;
  }

  .page-about .year-rail {
    position: sticky;
    top: 104px;
    display: block;
    overflow: visible;
    margin: 0;
    padding: 6px 0;
    border: 0;
    scrollbar-width: none;
  }

  .page-about .year-rail::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 14px;
    bottom: 14px;
    width: 1px;
    background: var(--mist-25);
  }

  .page-about .year-rail__node {
    position: relative;
    display: flex;
    padding: 14px 0 14px 20px;
    border: 0;
    border-radius: 0;
    background: none;
    font-size: 15px;
  }

  .page-about .year-rail__node:hover,
  .page-about .year-rail__node:focus-visible {
    background: none;
  }

  .page-about .year-rail__dot {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 9px;
    height: 9px;
    background: var(--mist-45);
    box-shadow: 0 0 0 4px var(--ink-night);
    transition: background 0.2s var(--ease);
  }

  .page-about .year-rail__node:hover .year-rail__dot,
  .page-about .year-rail__node:focus-visible .year-rail__dot {
    background: var(--amber);
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .margin-note__extra {
    max-height: 0;
    opacity: 0;
  }

  .page-about .margin-note:hover .margin-note__extra,
  .page-about .margin-note:focus-within .margin-note__extra {
    max-height: 6em;
    opacity: 1;
  }
}

@media (min-width: 1024px) {
  .page-about .col-cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .col-card:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .col-card:nth-child(4) {
    margin-top: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .col-card,
  .page-about .margin-note__extra,
  .page-about .year-rail__node,
  .page-about .about-cta__back a {
    transition: none;
  }

  .page-about .col-card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>