.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 28px);
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .breadcrumb .text-link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, color .2s ease;
}

.page-about .breadcrumb .text-link:hover {
  color: var(--ink);
  border-bottom-color: var(--poplar);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(36px, 6vw, 76px) 0 clamp(28px, 4vw, 52px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -5% auto -5%;
  height: 130%;
  background: var(--season-line);
  opacity: .10;
  filter: blur(80px);
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--season-line);
  opacity: .55;
}

.page-about .about-hero__inner {
  max-width: 960px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 5.6vw, 66px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 16px 0 0;
  max-width: 17em;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 42em;
  font-size: clamp(16px, 1.1vw + 12px, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero__meta {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 22px;
  border-top: var(--rule);
  padding-top: 20px;
  max-width: 760px;
}

.page-about .about-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .about-hero__stat b {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
}

@media (min-width: 700px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-hero__stat {
    flex-direction: column;
    gap: 4px;
    padding-left: 18px;
    border-left: var(--rule);
  }
  .page-about .about-hero__stat:first-child {
    border-left: 0;
    padding-left: 0;
  }
}

/* ---------- 宽幅图 ---------- */

.page-about .about-figure {
  margin: clamp(26px, 4vw, 52px) 0;
}

.page-about .about-figure--inline {
  margin-top: clamp(28px, 4vw, 44px);
  margin-bottom: 0;
  padding-top: clamp(20px, 3vw, 32px);
  border-top: var(--rule);
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.page-about .about-figure .media-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 52em;
}

/* ---------- 长文布局 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-bottom: clamp(50px, 8vw, 110px);
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 168px minmax(0, 660px);
    justify-content: start;
    column-gap: clamp(36px, 5vw, 72px);
    row-gap: 0;
  }
}

/* 章节目录 */

.page-about .about-toc {
  border-top: var(--rule);
  padding-top: 14px;
}

.page-about .about-toc__title {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--blueprint);
  margin: 0 0 12px;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 4px;
}

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

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--blueprint-soft);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .about-toc__link .mono {
  font-size: 11px;
  color: var(--blueprint);
  letter-spacing: .06em;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link[aria-current="true"] {
  color: var(--ink);
  border-color: var(--poplar);
  background-color: rgba(242, 193, 78, .16);
}

.page-about .about-toc__link[aria-current="true"] .mono {
  color: var(--autumn);
}

@media (min-width: 900px) {
  .page-about .about-toc {
    position: sticky;
    top: 92px;
    align-self: start;
  }
  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
  .page-about .about-toc__link {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 2px solid var(--blueprint-soft);
    border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
    padding: 7px 12px;
    font-size: 13.5px;
  }
  .page-about .about-toc__link:hover,
  .page-about .about-toc__link[aria-current="true"] {
    border-left-color: var(--poplar);
    background-color: transparent;
    padding-left: 16px;
  }
}

/* 正文块 */

.page-about .about-body {
  min-width: 0;
}

.page-about .about-block {
  padding-top: clamp(34px, 5vw, 58px);
  scroll-margin-top: 96px;
}

.page-about .about-block:first-child {
  padding-top: 0;
}

.page-about .section-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--blueprint);
  margin: 0 0 14px;
}

.page-about .section-mark::after {
  content: "";
  width: clamp(40px, 8vw, 90px);
  height: 1px;
  background: var(--blueprint);
  opacity: .8;
}

.page-about .about-block h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw + 12px, 42px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 20px;
  max-width: 20em;
}

.page-about .about-prose {
  max-width: 44em;
  font-size: clamp(16px, .5vw + 14px, 17px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-prose p {
  margin: 0 0 1.15em;
}

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

/* ---------- 四季分区卡片 ---------- */

.page-about .season-map {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 640px) {
  .page-about .season-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .season-card {
  --season-color: var(--spring);
  --season-tint: rgba(78, 140, 122, .10);
  position: relative;
  padding: 22px 22px 18px;
  border-radius: var(--radius-lg);
  background: var(--mist);
  border: 1px solid var(--blueprint-soft);
  border-top: 3px solid var(--season-color);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.page-about .season-card--spring { --season-color: var(--spring); --season-tint: rgba(78, 140, 122, .11); }
.page-about .season-card--summer { --season-color: var(--summer); --season-tint: rgba(217, 161, 74, .13); }
.page-about .season-card--autumn { --season-color: var(--autumn); --season-tint: rgba(180, 98, 58, .11); }
.page-about .season-card--winter { --season-color: var(--winter); --season-tint: rgba(47, 75, 114, .10); }

.page-about .season-card:hover,
.page-about .season-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: var(--season-color);
}

.page-about .season-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .season-card__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  border-radius: var(--radius-pill);
  background: var(--season-tint);
  color: var(--season-color);
  font-size: 14px;
  font-weight: 700;
}

.page-about .season-card__title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin: 0;
}

.page-about .season-card__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .season-card__panels {
  max-height: 0;
  overflow: hidden;
  transition: max-height .38s ease, margin-top .38s ease;
}

.page-about .season-card:hover .season-card__panels,
.page-about .season-card:focus-within .season-card__panels {
  max-height: 260px;
  margin-top: 14px;
}

.page-about .season-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.page-about .season-card__list li {
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  color: var(--ink);
  background: var(--season-tint);
  border: 1px solid var(--season-color);
  border-color: color-mix(in srgb, var(--season-color) 32%, transparent);
}

@media (hover: none) {
  .page-about .season-card__panels {
    max-height: none;
    margin-top: 14px;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .timeline__scale {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.page-about .timeline__scale::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 19px;
  height: 2px;
  background: var(--season-line);
  opacity: .6;
  border-radius: var(--radius-pill);
}

.page-about .timeline__tick {
  position: relative;
  display: flex;
  justify-content: center;
  text-decoration: none;
}

.page-about .timeline__tick .mono {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--mist);
  border: 1px solid var(--blueprint);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink);
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-about .timeline__tick:hover .mono,
.page-about .timeline__tick:focus-visible .mono {
  background: var(--poplar);
  border-color: var(--poplar);
  color: var(--ink);
}

.page-about .timeline__records {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .timeline__record {
  scroll-margin-top: 100px;
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  background: var(--gravel);
  border-left: 3px solid var(--blueprint);
}

.page-about .timeline__record:target {
  border-left-color: var(--poplar);
  background: var(--mist);
}

.page-about .timeline__year {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--autumn);
  margin: 0 0 6px;
}

.page-about .timeline__title {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
  line-height: 1.5;
}

.page-about .timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42em;
}

/* ---------- 覆盖数据 ---------- */

.page-about .coverage-grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--blueprint-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--blueprint-soft);
}

@media (min-width: 700px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .coverage-item {
  background: var(--mist);
  padding: 20px 18px;
}

.page-about .coverage-item__num {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--winter);
  margin: 0 0 8px;
  letter-spacing: .01em;
}

.page-about .coverage-item__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 内容原则 ---------- */

.page-about .principles {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .principle {
  position: relative;
  padding: 22px 22px 20px 74px;
  border-radius: var(--radius-lg);
  background: var(--mist);
  border: 1px solid var(--blueprint-soft);
}

.page-about .principle__no {
  position: absolute;
  left: 22px;
  top: 24px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--spring);
}

.page-about .principle:nth-child(2) .principle__no { color: var(--summer); }
.page-about .principle:nth-child(3) .principle__no { color: var(--winter); }

.page-about .principle__title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .principle__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
}

/* ---------- 续读 ---------- */

.page-about .about-next {
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(24px, 3.5vw, 34px);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(78, 140, 122, .10), rgba(47, 75, 114, .12));
  border: 1px solid var(--blueprint-soft);
}

.page-about .about-next__text {
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 480px) {
  .page-about .about-hero h1 {
    font-size: 30px;
  }
  .page-about .principle {
    padding: 20px 18px 18px 18px;
  }
  .page-about .principle__no {
    position: static;
    display: block;
    margin-bottom: 8px;
  }
  .page-about .timeline__tick .mono {
    min-width: 46px;
    font-size: 11px;
    padding: 3px 7px;
  }
  .page-about .about-next__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}
<<<END>>>