.page-about {
  --about-rail-w: 208px;
  --about-card-radius: 2px 14px 2px 14px;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--haze);
  margin-bottom: 22px;
}

.page-about .about-crumb a {
  color: var(--haze);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--maple);
  border-bottom-color: var(--maple);
}

.page-about .about-crumb__current {
  color: var(--slate);
}

.page-about .about-hero {
  position: relative;
  padding: 34px 0 44px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(233, 226, 213, .55) 0%, rgba(246, 243, 236, 0) 62%);
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero__eyebrow {
  color: var(--maple);
  margin: 0;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--maple);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-card-radius);
  overflow: hidden;
}

.page-about .about-hero__stat {
  background: var(--paper);
  padding: 14px 14px 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 4px;
}

.page-about .about-hero__statNum {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 26px;
  line-height: 1;
  color: var(--maple);
}

.page-about .about-hero__statUnit {
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-hero__statLabel {
  flex-basis: 100%;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--haze);
  margin-top: 4px;
}

.page-about .about-hero__visual {
  width: 100%;
  max-width: 400px;
  justify-self: center;
  padding: 10px;
  background: var(--sand);
  border: 1px solid var(--line);
  border-radius: 2px 18px 2px 18px;
}

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

/* ---------- 主体：刻度栏 + 内容 ---------- */
.page-about .about-body {
  display: grid;
  gap: 10px;
  padding: 40px 0 72px;
}

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

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--haze);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list > li {
  flex: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  font-size: 13px;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 2px 10px 2px 10px;
  background: rgba(255, 255, 255, .55);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--maple);
  border-color: var(--maple);
  background: var(--paper);
}

.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--haze);
}

.page-about .about-index__link:hover .about-index__num,
.page-about .about-index__link:focus-visible .about-index__num {
  color: var(--maple);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 24px;
}

.page-about .about-section__num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--maple);
  border: 1px solid var(--line);
  border-radius: 2px 8px 2px 8px;
  padding: 4px 8px;
  background: var(--paper);
  margin-top: 4px;
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(1.35rem, 4.4vw, 2rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-section__kicker {
  margin: 9px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--slate);
  max-width: 40em;
}

.page-about .about-section p {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-inline-link {
  color: var(--maple);
  text-decoration: none;
  border-bottom: 1px solid rgba(181, 35, 44, .35);
  transition: border-color var(--t) var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--maple);
}

/* ---------- 01 我们做的事 ---------- */
.page-about .about-work {
  display: grid;
  gap: 22px;
}

.page-about .about-work__text p {
  margin: 0 0 14px;
  max-width: 38em;
}

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

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

.page-about .about-work__item {
  border-top: 1px solid var(--line);
  padding: 14px 0 16px 16px;
  position: relative;
}

.page-about .about-work__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 6px;
  height: 6px;
  background: var(--clay);
  border-radius: 50%;
}

.page-about .about-work__itemTitle {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-about .about-work__itemText {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 02 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 22px;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img,
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--about-card-radius);
  background: var(--sand);
}

.page-about .about-team__cards {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  border: 1px solid var(--line);
  border-radius: var(--about-card-radius);
  padding: 16px 16px 14px;
  background: rgba(255, 255, 255, .6);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-2px);
  border-color: var(--haze);
}

.page-about .about-role__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-role__count {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--maple);
  font-weight: 500;
  white-space: nowrap;
}

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

.page-about .about-role__list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--moss);
}

/* ---------- 03 工序 ---------- */
.page-about .about-figure {
  margin: 0 0 22px;
}

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

.page-about .about-step {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--about-card-radius);
  padding: 16px 16px 16px 50px;
  background: rgba(255, 255, 255, .5);
}

.page-about .about-step__num {
  position: absolute;
  left: 14px;
  top: 16px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--maple);
  letter-spacing: .04em;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-step__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 04 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 20px;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 24px 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--maple);
  background: var(--paper);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--maple);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--maple);
  letter-spacing: .06em;
  margin-bottom: 4px;
}

.page-about .about-timeline__title {
  margin: 0 0 5px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 30em;
}

/* ---------- 05 服务方式 ---------- */
.page-about .about-service {
  display: grid;
  gap: 0;
}

.page-about .about-service__item {
  border-top: 1px solid var(--line);
  padding: 14px 0 16px;
}

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

.page-about .about-service__title {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-service__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--slate);
  max-width: 34em;
}

.page-about .about-service__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  background: var(--sand);
  border-radius: 0 12px 0 12px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--slate);
}

/* ---------- 结尾承诺 ---------- */
.page-about .about-pledge {
  margin-top: 26px;
  padding: 30px 22px;
  background: var(--night);
  color: var(--paper);
  border-radius: 2px 20px 2px 20px;
}

.page-about .about-pledge__quote {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.1rem, 4vw, 1.55rem);
  line-height: 1.62;
  color: var(--paper);
  max-width: 24em;
}

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

.page-about .about-pledge__ghost {
  color: var(--paper);
  border-color: rgba(246, 243, 236, .45);
  background: transparent;
}

.page-about .about-pledge__ghost:hover,
.page-about .about-pledge__ghost:focus-visible {
  color: var(--night);
  background: var(--paper);
  border-color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 44px 0 56px;
  }

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

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

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

  .page-about .about-service {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-about .about-service__item:nth-child(2) {
    border-top: 0;
    padding-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-hero__visual {
    justify-self: end;
    max-width: 420px;
  }

  .page-about .about-work {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .about-work__item:first-child::before {
    top: 6px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .about-timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .about-timeline__item {
    padding: 28px 10px 0 0;
  }

  .page-about .about-timeline__item::before {
    top: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 48px;
    padding: 56px 0 88px;
  }

  .page-about .about-index {
    position: sticky;
    top: 88px;
    align-self: start;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 2px 0 0 18px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 8px 0;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
  }

  .page-about .about-section {
    padding: 44px 0;
  }

  .page-about .about-section__head {
    gap: 18px;
    margin-bottom: 28px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-section--shift {
    margin-left: 44px;
  }

  .page-about .about-pledge {
    padding: 40px 34px;
  }
}

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

  .page-about .about-role:hover {
    transform: none;
  }
}