.page-about {
  --about-rail: 132px;
  --about-shift: clamp(0px, 2vw, 28px);
  background: var(--umi-paper);
  color: var(--umi-ink);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  max-width: min(var(--umi-shell), 92vw);
  margin: clamp(18px, 3vw, 34px) auto 0;
  padding: 0;
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--umi-ink-soft);
}

.page-about .about-crumb a {
  color: var(--umi-teal-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--umi-rule);
}

.page-about .about-crumb a:hover {
  border-bottom-color: var(--umi-amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: min(var(--umi-shell), 92vw);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 84px) 0 clamp(48px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--umi-font-display);
  font-weight: 200;
  font-size: clamp(38px, 6.4vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 14px 0 22px;
  color: var(--umi-deep);
}

.page-about .about-hero__copy .umi-lead {
  max-width: 33em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--umi-ink);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  border-top: 1px dashed var(--umi-rule);
  padding-top: 22px;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__num {
  font-family: var(--umi-font-mono);
  font-size: 26px;
  font-weight: 500;
  color: var(--umi-amber);
  letter-spacing: 0.02em;
}

.page-about .about-hero__fact {
  font-size: 13px;
  color: var(--umi-ink-soft);
}

.page-about .about-hero__figure {
  position: relative;
  border-radius: var(--umi-radius-lg);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  border-radius: var(--umi-radius-lg);
}

.page-about .about-hero__figure .umi-media__cap {
  margin: 12px 0 0;
  font-size: 12px;
  font-family: var(--umi-font-mono);
  letter-spacing: 0.06em;
  color: var(--umi-ink-soft);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-top: clamp(56px, 8vw, 104px);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 2px dashed var(--umi-rule);
}

.page-about .about-chapter__no {
  font-family: var(--umi-font-mono);
  font-size: 22px;
  color: var(--umi-amber);
  letter-spacing: 0.1em;
}

.page-about .about-chapter__word {
  font-family: var(--umi-font-display);
  font-size: 15px;
  letter-spacing: 0.22em;
  color: var(--umi-teal-ink);
}

.page-about .about-chapter__year {
  margin-left: auto;
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--umi-ink-soft);
}

.page-about .about-chapter__title {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  color: var(--umi-deep);
}

.page-about .about-chapter__body .umi-prose {
  max-width: 34em;
}

.page-about .about-chapter__body .umi-prose p {
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--umi-ink);
  margin: 0 0 1.2em;
}

/* ---------- 批注纸条 ---------- */
.page-about .about-note {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-note .umi-collapse {
  background: var(--umi-mist);
  border-radius: var(--umi-radius-md);
  transform: rotate(-0.8deg);
  box-shadow: 0 6px 18px rgba(20, 58, 69, 0.07);
}

.page-about .about-note .umi-collapse__btn {
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: var(--umi-font-body);
  font-size: 14.5px;
  color: var(--umi-deep);
}

.page-about .about-note__pin {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--umi-red);
  flex: none;
}

.page-about .about-note .umi-collapse__body {
  padding: 0 20px 18px 39px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--umi-ink);
}

.page-about .about-note .umi-collapse__body p {
  margin: 0;
}

/* ---------- 品牌主张（深色区） ---------- */
.page-about .about-belief {
  background: var(--umi-deep);
  color: var(--umi-paper);
  border-radius: 0;
}

.page-about .about-eyebrow--light {
  color: var(--umi-amber);
}

.page-about .about-belief__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 46px);
}

.page-about .about-belief__title {
  font-family: var(--umi-font-display);
  font-weight: 200;
  font-size: clamp(30px, 5vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  color: var(--umi-paper);
}

.page-about .about-belief__body p {
  font-size: 16.5px;
  line-height: 1.88;
  color: rgba(247, 244, 236, 0.86);
  margin: 0 0 1.2em;
  max-width: 34em;
}

.page-about .about-belief__aside {
  border-color: rgba(247, 244, 236, 0.28);
  color: rgba(247, 244, 236, 0.8);
}

.page-about .about-belief__aside .umi-index {
  color: var(--umi-amber);
}

.page-about .about-belief__aside p:last-child {
  font-size: 14px;
  line-height: 1.8;
  margin: 8px 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-rings {
  position: relative;
  width: min(220px, 62vw);
  margin: 0 auto clamp(18px, 3vw, 28px);
}

.page-about .about-rings__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-rings__c {
  fill: none;
  stroke-width: 9;
  stroke-linecap: round;
}

.page-about .about-rings__c--a {
  stroke: var(--umi-teal);
  stroke-dasharray: 0 0;
}

.page-about .about-rings__c--b {
  stroke: var(--umi-amber);
}

.page-about .about-rings__c--c {
  stroke: var(--umi-indigo);
}

.page-about .about-rings__core {
  fill: var(--umi-paper-2);
}

.page-about .about-rings__label {
  position: absolute;
  left: 50%;
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--umi-ink);
  padding: 2px 8px;
  border-radius: var(--umi-radius-pill);
  background: var(--umi-paper);
  border: 1px solid var(--umi-rule);
  transform: translate(-50%, -50%);
}

.page-about .about-rings__label--a { top: 6%; }
.page-about .about-rings__label--b { top: 27%; }
.page-about .about-rings__label--c { top: 46%; }

.page-about .about-team__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-team__cards {
  margin-top: 0;
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-team__card .umi-index {
  color: var(--umi-teal-ink);
}

.page-about .about-team__num {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: 40px;
  line-height: 1;
  color: var(--umi-deep);
  margin: 0;
}

.page-about .about-team__card p:last-child {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--umi-ink-soft);
  margin: 0;
}

/* ---------- 服务范围 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 40px);
  align-items: start;
}

.page-about .about-split__media img {
  border-radius: var(--umi-radius-lg);
}

.page-about .about-split__media .umi-media__cap {
  margin: 12px 0 0;
  font-size: 12px;
  font-family: var(--umi-font-mono);
  letter-spacing: 0.06em;
  color: var(--umi-ink-soft);
}

.page-about .about-split__text a {
  color: var(--umi-teal-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--umi-amber);
}

.page-about .about-local__panels {
  margin-top: clamp(24px, 4vw, 40px);
  border-top: 1px dashed var(--umi-rule);
}

.page-about .about-local__panels .umi-collapse {
  border-bottom: 1px dashed var(--umi-rule);
}

.page-about .about-local__panels .umi-collapse__btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 4px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--umi-font-body);
  font-size: 15px;
  color: var(--umi-deep);
}

.page-about .about-local__panels .umi-collapse__btn .umi-index {
  color: var(--umi-amber);
  flex: none;
}

.page-about .about-local__panels .umi-collapse__body {
  padding: 0 4px 20px 42px;
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--umi-ink-soft);
  max-width: 40em;
}

.page-about .about-local__panels .umi-collapse__body p {
  margin: 0;
}

.page-about .about-local__panels .umi-collapse__body a {
  color: var(--umi-teal-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--umi-amber);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-section {
  background: var(--umi-paper-2);
}

.page-about .about-timeline-head {
  max-width: min(var(--umi-shell), 92vw);
  margin: 0 auto clamp(30px, 5vw, 54px);
}

.page-about .about-timeline-head__title {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.2;
  color: var(--umi-deep);
  margin: 10px 0 14px;
}

.page-about .about-timeline-head__lead {
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--umi-ink-soft);
  margin: 0;
}

.page-about .about-timeline {
  position: relative;
  max-width: min(var(--umi-shell), 92vw);
  margin: 0 auto;
  padding: 8px 0 clamp(20px, 4vw, 42px);
  overflow-x: auto;
  overflow-y: visible;
}

.page-about .about-timeline__axis {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: repeating-linear-gradient(to right, var(--umi-rule) 0 7px, transparent 7px 13px);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: clamp(18px, 3vw, 40px);
  min-width: max-content;
  position: relative;
}

.page-about .about-timeline__node {
  position: relative;
  flex: 1 0 clamp(190px, 22vw, 260px);
  padding-top: 96px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-timeline__dot {
  position: absolute;
  top: calc(50% - 7px);
  left: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--umi-paper);
  border: 3px solid var(--umi-teal);
  box-shadow: 0 0 0 4px rgba(47, 125, 116, 0.14);
}

.page-about .about-timeline__node--now .about-timeline__dot {
  border-color: var(--umi-amber);
  box-shadow: 0 0 0 4px rgba(217, 138, 43, 0.18);
}

.page-about .about-timeline__when {
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--umi-teal-ink);
}

.page-about .about-timeline__node--now .about-timeline__when {
  color: var(--umi-amber);
}

.page-about .about-timeline__name {
  font-family: var(--umi-font-display);
  font-size: 19px;
  color: var(--umi-deep);
  margin: 0;
  line-height: 1.4;
}

.page-about .about-timeline__pop {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 220ms ease-out, opacity 200ms ease-out, transform 220ms ease-out;
  transform: translateY(4px);
  background: var(--umi-paper);
  border-radius: var(--umi-radius-md);
  border: 1px solid var(--umi-rule);
}

.page-about .about-timeline__pop p {
  margin: 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--umi-ink);
}

.page-about .about-timeline__node:hover .about-timeline__pop,
.page-about .about-timeline__node:focus-within .about-timeline__pop {
  max-height: 220px;
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-timeline-foot {
  max-width: min(var(--umi-shell), 92vw);
  margin: clamp(20px, 3vw, 34px) auto 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--umi-ink-soft);
}

.page-about .about-timeline-foot a {
  color: var(--umi-teal-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--umi-amber);
}

/* ---------- 标准四格 ---------- */
.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 36px);
  background: var(--umi-rule);
  border-radius: var(--umi-radius-md);
  overflow: hidden;
}

.page-about .about-standard__item {
  background: var(--umi-paper);
  padding: 20px 22px;
}

.page-about .about-standard__n {
  display: inline-block;
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--umi-teal-ink);
  background: var(--umi-mist);
  border-radius: var(--umi-radius-pill);
  padding: 3px 10px;
  margin-bottom: 10px;
}

.page-about .about-standard__item p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.8;
  color: var(--umi-ink);
}

/* ---------- 生态网格 ---------- */
.page-about .about-eco {
  background: var(--umi-indigo);
  color: var(--umi-paper);
}

.page-about .about-eco__head {
  max-width: min(var(--umi-shell), 92vw);
  margin: 0 auto clamp(28px, 4vw, 46px);
}

.page-about .about-eco__title {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.2;
  color: var(--umi-paper);
  margin: 10px 0 16px;
}

.page-about .about-eco__lead {
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.82);
  margin: 0;
}

.page-about .about-eco__grid {
  max-width: min(var(--umi-shell), 92vw);
  margin: 0 auto;
}

.page-about .about-eco__tile {
  background: rgba(247, 244, 236, 0.06);
  border: 1px solid rgba(247, 244, 236, 0.16);
  border-radius: var(--umi-radius-md);
  padding: 20px 22px;
  transition: transform 160ms ease-out, background 160ms ease-out;
}

.page-about .about-eco__tile:hover {
  transform: translateY(-2px);
  background: rgba(247, 244, 236, 0.1);
}

.page-about .about-eco__k {
  font-family: var(--umi-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--umi-amber);
  margin: 0 0 10px;
}

.page-about .about-eco__v {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: 30px;
  line-height: 1.15;
  color: var(--umi-paper);
  margin: 0 0 10px;
}

.page-about .about-eco__tile p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.76);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-cta__media img {
  border-radius: var(--umi-radius-lg);
}

.page-about .about-cta__media .umi-media__cap {
  margin: 12px 0 0;
  font-size: 12px;
  font-family: var(--umi-font-mono);
  letter-spacing: 0.06em;
  color: var(--umi-ink-soft);
}

.page-about .about-cta__title {
  font-family: var(--umi-font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.22;
  color: var(--umi-deep);
  margin: 0 0 16px;
}

.page-about .about-cta__body p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--umi-ink-soft);
  margin: 0 0 22px;
  max-width: 34em;
}

.page-about .about-cta__body a {
  color: var(--umi-teal-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--umi-amber);
}

.page-about .about-cta__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.85fr;
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    border-bottom: 0;
    border-left: 2px dashed var(--umi-rule);
    padding: 4px 0 4px 16px;
    position: sticky;
    top: 110px;
  }

  .page-about .about-chapter__year {
    margin-left: 0;
  }

  .page-about .about-chapter__body {
    transform: translateY(var(--about-shift));
  }

  .page-about .about-belief__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .about-belief__aside {
    grid-column: 2;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

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

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

  .page-about .about-timeline__node {
    flex: 1 1 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__pop,
  .page-about .about-eco__tile {
    transition: none;
  }

  .page-about .about-timeline__node:hover .about-timeline__pop,
  .page-about .about-timeline__node:focus-within .about-timeline__pop {
    transform: none;
  }
}