.page-about {
  --about-ink-soft: #3A3730;
  --about-hair: rgba(18, 61, 51, .14);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  padding-block: clamp(20px, 4vw, 44px) clamp(32px, 5vw, 68px);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -6% 30% -6%;
  background: radial-gradient(60% 70% at 20% 10%, rgba(217, 164, 65, .14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__copy,
.page-about .about-hero__stack {
  position: relative;
  z-index: 1;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  letter-spacing: .18em;
  color: var(--stone);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.16;
  font-size: clamp(2rem, 7vw, 4rem);
  color: var(--green);
  margin: .35em 0 .5em;
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 2.4vw, 1.075rem);
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 34em;
}

.page-about .about-hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.32rem;
  color: var(--green);
  letter-spacing: .02em;
}

.page-about .about-stat__txt {
  font-size: .84rem;
  color: var(--stone);
}

/* 叠放档案册 */
.page-about .about-hero__stack {
  position: relative;
  padding: 14px 14px 0 0;
  align-self: start;
}

.page-about .about-hero__paper {
  position: absolute;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: var(--paper);
}

.page-about .about-hero__paper--back {
  inset: 0 0 26px 22px;
  transform: rotate(3.4deg);
  background: linear-gradient(160deg, #EFE5D3, #E3D7C1);
}

.page-about .about-hero__paper--mid {
  inset: 8px 8px 14px 10px;
  transform: rotate(-1.8deg);
  background: var(--paper);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--felt);
}

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

.page-about .about-hero__caption {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--stone);
  margin: 12px 0 0 4px;
}

/* 正文两栏 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

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

.page-about .about-sec {
  padding-block: clamp(30px, 4.5vw, 56px);
  border-top: 1px solid var(--about-hair);
}

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

.page-about .about-sec__head {
  max-width: 42em;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--green);
  margin: .3em 0 0;
}

.page-about .about-sec__lede {
  margin-top: .9em;
  color: var(--about-ink-soft);
  line-height: 1.8;
  font-size: .98rem;
}

/* 来路 */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-origin__text p {
  line-height: 1.9;
  color: var(--about-ink-soft);
  margin: 0 0 1em;
  font-size: .98rem;
}

.page-about .about-note {
  border-left: 3px solid var(--clay);
  background: linear-gradient(180deg, rgba(185, 122, 91, .1), rgba(185, 122, 91, .03));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 18px;
}

.page-about .about-note__title {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--clay);
  margin: 0 0 10px;
}

.page-about .about-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-note__list li {
  position: relative;
  padding-left: 16px;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--about-ink-soft);
}

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* 段位图 */
.page-about .about-ranks__figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--felt-deep);
}

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

.page-about .about-ranks__figure .media-frame__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--gold-soft);
}

/* 时间轴 */
.page-about .about-rail {
  position: relative;
  padding-left: 34px;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(18, 61, 51, .22));
}

.page-about .about-stage {
  position: relative;
  margin-bottom: 12px;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  transition: box-shadow .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--chip);
  box-shadow: 0 0 0 3px var(--cream);
}

.page-about .about-stage[open] {
  box-shadow: var(--shadow-card);
  border-color: rgba(217, 164, 65, .55);
}

.page-about .about-stage:hover {
  transform: translateY(-2px);
}

.page-about .about-stage__sum {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "num scope";
  gap: 2px 12px;
  padding: 14px 16px;
  min-height: 44px;
  align-items: center;
}

.page-about .about-stage__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-stage__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--gold);
  align-self: start;
  padding-top: 2px;
}

.page-about .about-stage__name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.06rem;
  color: var(--green);
  letter-spacing: .01em;
}

.page-about .about-stage__scope {
  grid-area: scope;
  font-size: .8rem;
  color: var(--stone);
  line-height: 1.5;
}

.page-about .about-stage__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 4px 16px 18px 40px;
}

.page-about .about-stage__sub {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--moss);
  margin: 0 0 8px;
}

.page-about .about-stage__col--warn .about-stage__sub {
  color: var(--chip);
}

.page-about .about-stage__list {
  margin: 0;
  padding-left: 1.15em;
  display: grid;
  gap: 7px;
}

.page-about .about-stage__list li {
  font-size: .91rem;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* 标签墙 */
.page-about .about-tagwall {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-fam {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: var(--paper);
  padding: 13px 14px;
}

.page-about .about-fam__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--about-hair);
}

.page-about .about-fam__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  color: var(--green);
}

.page-about .about-fam__count {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--clay);
}

.page-about .about-fam__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-fam__tags .tag {
  font-size: .78rem;
  padding: 3px 10px;
  border-radius: var(--pill);
  background: rgba(111, 139, 106, .16);
  color: var(--green);
  border: 1px solid transparent;
}

.page-about .about-tagwall__foot {
  margin-top: 18px;
  font-size: .9rem;
  color: var(--stone);
  line-height: 1.75;
}

.page-about .about-inline-link {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover {
  color: var(--clay);
}

/* 编辑室 */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg) var(--radius-md) var(--radius-md) var(--radius-lg);
  overflow: hidden;
  background: var(--moss);
}

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

.page-about .about-team__text p {
  font-size: .96rem;
  line-height: 1.88;
  color: var(--about-ink-soft);
  margin: 0 0 1em;
}

.page-about .about-principles {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
  border-top: 1px solid var(--about-hair);
  padding-top: 16px;
}

.page-about .about-principles li {
  font-size: .88rem;
  line-height: 1.6;
  color: var(--about-ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}

.page-about .about-principles .about-num {
  font-size: .84rem;
  color: var(--green);
  background: rgba(217, 164, 65, .22);
  border-radius: var(--radius-sm);
  padding: 1px 8px;
  letter-spacing: .06em;
}

/* 合作 */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-cities {
  background: linear-gradient(150deg, var(--green) 0%, var(--felt) 100%);
  border-radius: var(--radius-lg);
  padding: 20px;
  color: var(--cream);
}

.page-about .about-cities__grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 9px;
  margin-bottom: 16px;
}

.page-about .about-cities__grid span {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--gold);
  opacity: .85;
}

.page-about .about-cities__grid span:nth-child(3n) {
  background: var(--clay);
}

.page-about .about-cities__grid span:nth-child(5n) {
  background: var(--moss);
}

.page-about .about-cities__grid span:nth-child(7n) {
  background: var(--gold-soft);
}

.page-about .about-cities__txt {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--cream);
}

.page-about .about-cities__txt .about-num {
  color: var(--gold);
  font-size: 1.5rem;
  margin-right: 4px;
}

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

.page-about .about-partner-list li {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--about-ink-soft);
  border-bottom: 1px solid var(--about-hair);
  padding-bottom: 10px;
}

.page-about .about-partner__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--paper);
  background: var(--moss);
  border-radius: var(--pill);
  padding: 1px 9px;
  margin-right: 8px;
}

/* 纠错流程 */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-flow__step {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  padding: 16px 16px 18px;
}

.page-about .about-flow__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .92rem;
  color: var(--paper);
  background: var(--chip);
  border-radius: var(--radius-sm);
  padding: 2px 9px;
  margin-bottom: 10px;
}

.page-about .about-flow__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.04rem;
  color: var(--green);
  margin: 0 0 6px;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .about-cta {
  margin-top: clamp(22px, 3vw, 32px);
  background: linear-gradient(140deg, var(--green-deep), var(--felt-deep));
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 32px);
  display: grid;
  gap: 16px;
}

.page-about .about-cta__txt {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.6vw, 1.28rem);
  line-height: 1.65;
  color: var(--cream);
}

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

/* 目录 */
.page-about .about-toc {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: rgba(251, 247, 239, .72);
  padding: 16px 18px;
}

.page-about .about-toc__title {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--stone);
  margin: 0 0 12px;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-toc__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 0;
  font-size: .9rem;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--gold);
}

.page-about .about-toc__no {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--gold);
}

.page-about .about-toc__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-hair);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--stone);
}

.page-about .about-toc__foot a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 焦点可见 */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* 中屏 */
@media (min-width: 700px) {
  .page-about .about-tagwall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-stage__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 22px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

/* 桌面 */
@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
    padding-block: clamp(28px, 3vw, 48px) clamp(48px, 5vw, 84px);
  }

  .page-about .about-hero__stack {
    margin-top: 8px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 236px;
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: clamp(84px, 9vw, 120px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) 264px;
    gap: 32px;
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .about-stage__sum {
    padding: 16px 20px;
  }

  .page-about .about-stage__body {
    padding: 6px 20px 20px 46px;
  }

  .page-about .about-hero__title {
    font-size: clamp(2.6rem, 4.2vw, 3.6rem);
  }
}

/* 动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage,
  .page-about .about-toc__list a {
    transition: none;
  }

  .page-about .about-stage:hover {
    transform: none;
  }
}
<<<END>>>