.page-about {
  --about-ring: rgba(216, 154, 60, 0.18);
  --about-ring-soft: rgba(244, 239, 230, 0.07);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .breadcrumb {
  margin: 22px 0 6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 10px 0 52px;
  border-bottom: 1px solid var(--about-ring);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 96px;
  height: 2px;
  background: var(--flare);
}

.page-about .about-hero .display {
  margin: 16px 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-ring-soft);
  border: 1px solid var(--about-ring-soft);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--ink);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-hero__cap {
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding: 60px 0 62px;
  background: linear-gradient(180deg, var(--pine) 0%, var(--ink) 92%);
  border-bottom: 1px solid var(--about-ring);
}

.page-about .about-origin__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-origin__text .section-title {
  margin: 0 0 18px;
  max-width: 24ch;
}

.page-about .about-origin .prose p {
  color: rgba(244, 239, 230, 0.78);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding: 58px 0 62px;
  background: var(--ink);
}

.page-about .about-timeline__list {
  list-style: none;
  position: relative;
  margin: 42px 0 0;
  padding: 0;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, var(--clay) 58%, rgba(180, 105, 74, 0) 100%);
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 42px 34px;
  outline: none;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(180, 105, 74, 0.16);
  transition: background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-visible::before {
  background: var(--flare);
  box-shadow: 0 0 0 6px rgba(255, 106, 31, 0.18);
}

.page-about .about-timeline__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 10px;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.76);
}

.page-about .about-timeline__extra {
  margin-top: 14px !important;
  padding-left: 13px;
  border-left: 2px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--mist);
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__extra,
.page-about .about-timeline__item:focus-visible .about-timeline__extra {
  border-color: var(--flare);
  color: var(--paper);
}

/* ---------- 呼吸段 ---------- */
.page-about .about-breath {
  padding: 66px 0;
  background: var(--ink);
}

.page-about .about-breath__line {
  margin: 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--about-ring);
  max-width: 34ch;
  font-size: 19px;
  line-height: 1.85;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-breath__line span {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 58px 0 64px;
  background: var(--pine);
  border-top: 1px solid var(--about-ring);
  border-bottom: 1px solid var(--about-ring);
}

.page-about .about-team__grid {
  display: grid;
  gap: 28px;
  margin-top: 38px;
}

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

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
}

.page-about .about-team__role {
  padding: 20px 18px;
}

.page-about .about-team__role h3 {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-team__role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 239, 230, 0.78);
}

/* ---------- 内容生产 ---------- */
.page-about .about-flow {
  padding: 62px 0 66px;
  background: var(--ink);
}

.page-about .about-flow__grid {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}

.page-about .about-flow__lead {
  margin: 0 0 24px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.86);
}

.page-about .about-flow__steps {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-ring-soft);
  border-top: 1px solid var(--about-ring);
  border-bottom: 1px solid var(--about-ring);
}

.page-about .about-flow__step {
  background: var(--ink);
  padding: 18px 0;
}

.page-about .about-flow__step dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-flow__step dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.76);
}

.page-about .about-flow__note {
  margin: 26px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-flow__note a {
  color: var(--flare);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

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

.page-about .about-chart__axis {
  stroke: var(--mist);
  stroke-width: 1;
  stroke-dasharray: 3 6;
  opacity: 0.5;
}

.page-about .about-chart__dot--a {
  fill: var(--flare);
}

.page-about .about-chart__dot--b {
  fill: var(--amber);
}

.page-about .about-chart__dot--c {
  fill: var(--clay);
}

.page-about .about-chart__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  fill: var(--mist);
}

.page-about .about-chart__label--cap {
  font-size: 11.5px;
  fill: var(--paper);
}

/* ---------- 本地 ---------- */
.page-about .about-local {
  padding: 58px 0 66px;
  background: linear-gradient(180deg, var(--ink) 0%, #12211b 60%, var(--moss) 200%);
  border-top: 1px solid var(--about-ring);
}

.page-about .about-local__photo {
  margin: 36px 0 0;
}

.page-about .about-local__body {
  display: grid;
  gap: 28px;
  margin-top: 34px;
}

.page-about .about-local__prose p {
  color: rgba(244, 239, 230, 0.8);
}

.page-about .about-local__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-ring-soft);
  border: 1px solid var(--about-ring-soft);
  align-self: start;
}

.page-about .about-local__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(10, 15, 13, 0.72);
}

.page-about .about-local__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-local__cap {
  font-size: 13px;
  line-height: 1.55;
  color: var(--stone);
}

/* ---------- 三条标准 ---------- */
.page-about .about-standards {
  padding: 60px 0 64px;
  background: var(--ink);
}

.page-about .about-standards__list {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-standards__item {
  padding: 24px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-standards__item .mono-index {
  color: var(--clay);
}

.page-about .about-standards__item h3 {
  margin: 0;
}

.page-about .about-standards__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 239, 230, 0.78);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: 14px 0 72px;
  background: var(--ink);
}

.page-about .about-cta__card {
  padding: 30px 22px 26px;
  display: grid;
  gap: 24px;
}

.page-about .about-cta__copy .section-title {
  margin: 0 0 14px;
  color: var(--deep);
  max-width: 20ch;
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(10, 15, 13, 0.78);
}

.page-about .about-cta__copy a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .about-cta__card {
    padding: 36px 32px 32px;
  }
}

@media (min-width: 820px) {
  .page-about .about-hero {
    padding: 18px 0 62px;
  }

  .page-about .about-origin {
    padding: 72px 0 76px;
  }

  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 22px;
    padding-left: 40px;
  }

  .page-about .about-timeline__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: 42px;
    align-items: start;
  }

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

  .page-about .about-local__body {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-standards__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about .about-cta__card {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
    padding: 40px 40px 36px;
  }

  .page-about .about-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1080px) {
  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .about-breath {
    padding: 84px 0;
  }

  .page-about .about-breath__line {
    max-width: 40ch;
    font-size: 21px;
  }

  .page-about .about-flow__steps {
    border-top: none;
  }

  .page-about .about-flow__step {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
    border-top: 1px solid var(--about-ring-soft);
    padding: 20px 0;
  }

  .page-about .about-flow__step dt {
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__extra {
    transition: none;
  }
}
<<<END>>>