.page-about {
  --about-axis: 140px;
  background-color: var(--cs-paper);
  color: var(--cs-ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 72px) 0 clamp(46px, 8vw, 94px);
  border-bottom: 1px solid var(--cs-line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center bottom;
  opacity: 0.2;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(104deg, var(--cs-paper) 32%, rgba(247, 241, 227, 0.62) 66%, rgba(247, 241, 227, 0.08) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(20, 17, 15, 0.55);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(20, 17, 15, 0.3);
}

.page-about .crumbs a {
  color: var(--cs-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--cs-line);
  padding-bottom: 1px;
}

.page-about .crumbs a:hover {
  color: var(--cs-red);
  border-bottom-color: var(--cs-red);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 14em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--cs-ink);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(20, 17, 15, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 章节通用 ---------- */

.page-about .about-section {
  padding: clamp(52px, 8vw, 104px) 0;
}

.page-about .chapter {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .chapter-index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cs-red);
  opacity: 0.9;
}

.page-about .chapter-kicker {
  margin: 12px 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cs-blue);
}

.page-about .chapter-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--cs-ink);
  max-width: 18em;
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-origin__copy p {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.92;
  color: rgba(20, 17, 15, 0.82);
}

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

.page-about .dropcap::first-letter {
  float: left;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 48px;
  line-height: 0.94;
  padding: 4px 12px 0 0;
  color: var(--cs-red);
}

.page-about .about-origin__figure {
  margin: 0;
  position: relative;
  border-top: 1px solid var(--cs-gold);
  padding-top: 14px;
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--cs-line);
  background-color: var(--cs-ivory);
}

.page-about .figure-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(20, 17, 15, 0.6);
}

/* ---------- 时间轴 ---------- */

.page-about .tm {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tm__item {
  position: relative;
  padding-bottom: 38px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-about .tm__year {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cs-ink);
  text-decoration: none;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--cs-gold);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .tm__year-sep {
  color: var(--cs-gold);
  font-size: 14px;
}

.page-about .tm__year:hover,
.page-about .tm__item:target .tm__year {
  color: var(--cs-red);
  border-bottom-color: var(--cs-red);
}

.page-about .tm__body {
  margin-top: 16px;
  padding-left: 16px;
  border-left: 2px solid var(--cs-line);
  transition: border-color 200ms var(--ease);
}

.page-about .tm__item:target .tm__body {
  border-left-color: var(--cs-red);
}

.page-about .tm__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cs-blue);
}

.page-about .tm__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.5;
  color: var(--cs-ink);
}

.page-about .tm__text {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(20, 17, 15, 0.78);
}

/* ---------- 数据带 ---------- */

.page-about .about-band {
  position: relative;
  overflow: hidden;
  background-color: var(--cs-green);
  color: var(--cs-paper);
  padding: clamp(42px, 7vw, 82px) 0;
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(201, 162, 39, 0.2), transparent 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(196, 22, 42, 0.26), transparent 60%);
}

.page-about .about-band .container {
  position: relative;
  z-index: 1;
}

.page-about .about-band__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cs-gold);
}

.page-about .about-band__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.4;
  color: var(--cs-paper);
}

.page-about .about-band__stats {
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--cs-line-light);
}

.page-about .stat {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  gap: 8px;
  padding: 22px 16px 22px 0;
  border-bottom: 1px solid var(--cs-line-light);
}

.page-about .stat dd {
  margin: 0;
}

.page-about .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--cs-gold);
}

.page-about .stat__value span {
  margin-left: 4px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: rgba(247, 241, 227, 0.72);
}

.page-about .stat__label {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(247, 241, 227, 0.72);
}

/* ---------- 日常维护 ---------- */

.page-about .about-ops__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-ops__head {
  margin-bottom: 0;
}

.page-about .about-ops__intro {
  margin: 16px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(20, 17, 15, 0.72);
}

.page-about .ops-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ops {
  display: grid;
  grid-template-columns: 32px 1fr;
  column-gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--cs-line);
}

.page-about .ops:last-child {
  border-bottom: 1px solid var(--cs-line);
}

.page-about .ops__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cs-red);
  padding-top: 5px;
}

.page-about .ops__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.5;
  color: var(--cs-ink);
}

.page-about .ops__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(20, 17, 15, 0.76);
}

/* ---------- 团队与分工 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-team__figure {
  margin: 0;
  border-top: 1px solid var(--cs-gold);
  padding-top: 14px;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--cs-line);
  background-color: var(--cs-ivory);
}

.page-about .about-team__head {
  margin-bottom: 18px;
}

.page-about .about-team__text {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.92;
  color: rgba(20, 17, 15, 0.82);
}

.page-about .team-roles {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-roles li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(20, 17, 15, 0.78);
}

.page-about .team-roles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  background-color: var(--cs-red);
  box-shadow: 0 0 0 1px var(--cs-gold);
}

.page-about .team-roles strong {
  font-weight: 700;
  color: var(--cs-ink);
  margin-right: 6px;
}

.page-about .about-team__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(20, 17, 15, 0.65);
}

/* ---------- 地域 ---------- */

.page-about .about-place {
  border-top: 1px solid var(--cs-line);
}

.page-about .about-place__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-place__head {
  margin-bottom: 0;
}

.page-about .about-place__copy p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.92;
  color: rgba(20, 17, 15, 0.78);
}

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

.page-about .about-place__cta {
  padding-top: 14px;
  border-top: 1px solid var(--cs-line);
}

.page-about .about-link {
  color: var(--cs-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 110, 126, 0.42);
  padding-bottom: 1px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-link:hover {
  color: var(--cs-red);
  border-bottom-color: var(--cs-red);
}

/* ---------- 收束 ---------- */

.page-about .about-close {
  background-color: var(--cs-ivory);
  border-top: 1px solid var(--cs-line);
  padding: 120px 0;
}

.page-about .about-close__line {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.68;
  letter-spacing: -0.01em;
  color: var(--cs-ink);
}

.page-about .about-close__line::before {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin-bottom: 26px;
  background-color: var(--cs-red);
}

.page-about .about-close__sign {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(20, 17, 15, 0.55);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-band__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 8px;
  }

  .page-about .stat {
    padding: 26px 20px 22px 0;
  }
}

@media (min-width: 880px) {
  .page-about .about-origin {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-origin__figure {
    margin-top: 6px;
  }

  .page-about .tm {
    position: relative;
  }

  .page-about .tm::before {
    content: "";
    position: absolute;
    left: var(--about-axis);
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--cs-gold) 0%, rgba(201, 162, 39, 0.14) 100%);
  }

  .page-about .tm__item {
    display: grid;
    grid-template-columns: 108px 1fr;
    column-gap: 52px;
    padding-bottom: 52px;
  }

  .page-about .tm__item::before {
    content: "";
    position: absolute;
    left: var(--about-axis);
    top: 12px;
    width: 13px;
    height: 13px;
    margin-left: -7px;
    background-color: var(--cs-red);
    box-shadow: 0 0 0 1px var(--cs-gold);
    transition: background-color 200ms var(--ease);
  }

  .page-about .tm__item:target::before {
    background-color: var(--cs-gold);
    box-shadow: 0 0 0 1px var(--cs-red);
  }

  .page-about .tm__year {
    display: block;
    text-align: right;
    font-size: 26px;
    padding-bottom: 0;
    border-bottom: 0;
    line-height: 1.25;
  }

  .page-about .tm__year-sep {
    display: block;
    font-size: 12px;
    line-height: 1.1;
    margin: 2px 0;
  }

  .page-about .tm__body {
    margin-top: 0;
    padding-left: 22px;
  }

  .page-about .about-ops__grid {
    grid-template-columns: 4fr 8fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
    align-items: start;
  }

  .page-about .about-team__figure {
    order: 2;
    margin-top: 4px;
  }

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

  .page-about .about-place__grid {
    grid-template-columns: 3fr 9fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-close {
    padding: 160px 0;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero {
    padding-top: 82px;
  }

  .page-about .about-close__line {
    max-width: 20em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tm__year,
  .page-about .tm__body,
  .page-about .tm__item::before,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>