.page-about .ab-hero {
  padding-block: 34px 26px;
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--c-orange);
}

.page-about .ab-hero__title {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 6.4vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--c-lake);
}

.page-about .ab-hero__lede {
  margin: 0 0 30px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-gravel);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--c-line);
  border: var(--hairline);
}

.page-about .ab-stats__cell {
  padding: 14px 16px 16px;
  background: var(--c-mist);
}

.page-about .ab-stats__key {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-gravel);
}

.page-about .ab-stats__val {
  margin: 0;
  font-size: 13px;
  color: var(--c-lake);
}

.page-about .ab-stats__num {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-lake);
}

.page-about .ab-index {
  position: sticky;
  top: 0;
  z-index: 30;
  margin-top: 10px;
  border-top: var(--hairline);
  border-bottom: var(--hairline);
  background: rgba(244, 247, 249, .95);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-about .ab-index__list {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
  list-style: none;
}

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

.page-about .ab-index__link {
  display: block;
  padding: 13px 13px 10px;
  border-bottom: 3px solid transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-gravel);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible,
.page-about .ab-index__link[aria-current="true"] {
  color: var(--c-lake);
  border-bottom-color: var(--c-orange);
}

.page-about .ab-sec {
  padding-block: 52px 46px;
}

.page-about .ab-sec--last {
  padding-bottom: 64px;
}

.page-about .ab-sec__head {
  margin-bottom: 30px;
}

.page-about .ab-sec__num {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-orange);
}

.page-about .ab-sec__title {
  margin: 0 0 14px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 33px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: .04em;
  color: var(--c-lake);
}

.page-about .ab-sec__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-gravel);
}

.page-about .ab-figure {
  margin: 0 0 30px;
  border: var(--hairline);
  background: var(--c-white);
  overflow: hidden;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: center top;
}

.page-about .ab-figure--region img {
  height: auto;
  aspect-ratio: 12 / 7;
  object-position: center;
}

.page-about .ab-figure__cap {
  padding: 10px 14px 12px;
  border-top: var(--hairline);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-gravel);
}

/* ---------- 时间轴 ---------- */

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

.page-about .tl__item {
  position: relative;
  margin-left: 6px;
  padding: 0 0 30px 46px;
  border-left: 3px solid var(--tl-band, var(--c-orange));
}

.page-about .tl__item--last {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: -8.5px;
  top: 18px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--tl-band, var(--c-orange));
  box-shadow: 0 0 0 3px var(--c-mist);
}

.page-about .tl__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: clamp(30px, 8vw, 52px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--tl-band, var(--c-orange));
}

.page-about .tl__card {
  border: var(--hairline);
  background: var(--c-white);
  box-shadow: var(--shadow-soft);
}

.page-about .tl__btn {
  display: block;
  width: 100%;
  padding: 15px 16px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: var(--c-lake);
}

.page-about .tl__headline {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .02em;
}

.page-about .tl__btn:hover .tl__headline {
  color: var(--c-lake-mid);
}

.page-about .tl__body {
  padding: 0 16px 16px;
}

.page-about .tl__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-gravel);
}

.page-about .tl__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 13px;
  color: var(--c-gravel);
}

/* ---------- 日常职责 ---------- */

.page-about .ab-duty {
  display: grid;
  gap: 26px;
}

.page-about .ab-duty__figure {
  margin: 0;
  border: var(--hairline);
  background: var(--c-white);
  overflow: hidden;
}

.page-about .ab-duty__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .ab-duty__list {
  display: grid;
  gap: 18px;
}

.page-about .ab-duty__item {
  position: relative;
  padding: 16px 18px 18px 54px;
  border: var(--hairline);
  background: var(--c-mist);
  box-shadow: var(--shadow-soft);
}

.page-about .ab-duty__idx {
  position: absolute;
  left: 16px;
  top: 16px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-orange);
}

.page-about .ab-duty__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--c-lake);
}

.page-about .ab-duty__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-gravel);
}

/* ---------- 团队 ---------- */

.page-about .ab-team {
  display: grid;
  gap: 30px;
}

.page-about .ab-team__visual {
  display: grid;
  gap: 24px;
}

.page-about .ab-ring {
  position: relative;
  display: grid;
  place-items: center;
  width: 196px;
  height: 196px;
  margin: 0 auto;
  border-radius: 50%;
  background: conic-gradient(
    #E8752B 0turn .5turn,
    #3E7C4A .5turn .75turn,
    #1E6E8C .75turn .9167turn,
    #C9D6DE .9167turn 1turn
  );
}

.page-about .ab-ring::after {
  content: "";
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  background: var(--c-white);
  border: var(--hairline);
}

.page-about .ab-ring__total {
  position: relative;
  z-index: 1;
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-lake);
  text-align: center;
}

.page-about .ab-ring__total small {
  display: block;
  margin-top: 5px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--c-gravel);
}

.page-about .ab-legend {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-legend__item {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 2px;
  border-bottom: 1px dashed var(--c-line);
}

.page-about .ab-legend__item--edit { --dot: #E8752B; }
.page-about .ab-legend__item--check { --dot: #3E7C4A; }
.page-about .ab-legend__item--fe { --dot: #1E6E8C; }
.page-about .ab-legend__item--service { --dot: #6B7A85; }

.page-about .ab-legend__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--dot, var(--c-gravel));
}

.page-about .ab-legend__name {
  font-size: 15px;
  color: var(--c-lake);
}

.page-about .ab-legend__count {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-lake);
}

.page-about .ab-team__notes {
  display: grid;
  gap: 16px;
}

.page-about .ab-team__notes .panel__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-gravel);
}

/* ---------- 区域 ---------- */

.page-about .ab-region {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .ab-region__card {
  padding: 18px 20px 20px;
  border: var(--hairline);
  border-top: 3px solid var(--c-barley);
  background: var(--c-white);
  box-shadow: var(--shadow-soft);
}

.page-about .ab-region__card--main {
  border-top-color: var(--c-orange);
  background: linear-gradient(180deg, rgba(232, 117, 43, .07), rgba(244, 247, 249, 0) 62%), var(--c-white);
}

.page-about .ab-region__label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-gravel);
}

.page-about .ab-region__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .03em;
  color: var(--c-lake);
}

.page-about .ab-region__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-gravel);
}

/* ---------- 更新节奏 ---------- */

.page-about .ab-cadence {
  display: grid;
  gap: 2px;
  background: var(--c-line);
  border: var(--hairline);
}

.page-about .ab-cadence__row {
  display: grid;
  gap: 8px;
  padding: 20px 20px 22px;
  background: var(--c-mist);
}

.page-about .ab-cadence__period {
  align-self: start;
  display: inline-block;
  padding: 5px 10px;
  border-radius: var(--radius);
  background: var(--c-orange-soft);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-lake);
}

.page-about .ab-cadence__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: .02em;
  color: var(--c-lake);
}

.page-about .ab-cadence__detail p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-gravel);
}

/* ---------- 合作 ---------- */

.page-about .ab-partner {
  display: grid;
  gap: 24px;
}

.page-about .ab-partner__main p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-gravel);
}

.page-about .ab-partner__aside {
  padding: 20px 20px 22px;
  border: var(--hairline);
  background: var(--c-deep);
}

.page-about .ab-partner__aside-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-mist);
}

.page-about .ab-partner__links {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-partner__links .btn {
  width: 100%;
  text-align: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-figure img {
    height: 260px;
  }

  .page-about .ab-figure--region img {
    height: auto;
  }

  .page-about .ab-cadence__row {
    grid-template-columns: 110px 1fr;
    gap: 20px;
    align-items: start;
  }

  .page-about .ab-cadence__period {
    justify-self: start;
  }

  .page-about .ab-region {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-ring {
    width: 216px;
    height: 216px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-block: 48px 34px;
  }

  .page-about .ab-hero__lede {
    font-size: 17px;
  }

  .page-about .ab-sec {
    padding-block: 66px 56px;
  }

  .page-about .ab-figure {
    margin-bottom: 38px;
  }

  .page-about .ab-figure img {
    height: 300px;
  }

  .page-about .ab-figure--region img {
    height: auto;
  }

  .page-about .tl__item {
    padding-left: 64px;
    padding-bottom: 38px;
  }

  .page-about .tl__year {
    margin-bottom: 12px;
  }

  .page-about .tl__btn {
    padding: 18px 22px;
  }

  .page-about .tl__headline {
    font-size: 19px;
  }

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

  .page-about .ab-duty {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-team {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-team__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-partner {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 36px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --tl-band: transparent;
}