.page-about {
  --about-rule: rgba(95, 87, 77, 0.26);
  --about-hairline: 1px dashed rgba(95, 87, 77, 0.3);
  background-color: var(--paper);
  background-image:
    radial-gradient(120% 80% at 8% 0%, rgba(226, 179, 155, 0.16), transparent 58%),
    radial-gradient(90% 62% at 92% 6%, rgba(148, 163, 141, 0.14), transparent 55%);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
  overflow-x: clip;
}

.page-about a {
  color: var(--terracotta-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 79, 46, 0.35);
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  padding-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--rock);
}

.page-about .breadcrumb__item a {
  border-bottom: none;
  color: var(--rock);
}

.page-about .breadcrumb__item a:hover {
  color: var(--terracotta);
}

.page-about .breadcrumb__sep {
  color: var(--moss);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.6rem) 0 clamp(1.8rem, 5vw, 3.2rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(122deg, var(--paper-deep) 0%, var(--paper-deep) 56%, transparent 56%);
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -6rem;
  top: -5rem;
  width: 16rem;
  height: 16rem;
  background: var(--terracotta-soft);
  opacity: 0.35;
  transform: rotate(18deg);
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1.5rem;
}

.page-about .about-kicker {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--terracotta-deep);
}

.page-about .about-h1 {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.85rem, 6.2vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--frame);
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.1rem;
}

.page-about .about-chips .tag {
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}

.page-about .about-plate {
  background: var(--paper);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  padding: 1rem 1.05rem 1.1rem;
}

.page-about .about-plate__label {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--rock);
  padding-bottom: 0.55rem;
  border-bottom: var(--about-hairline);
}

.page-about .about-plate__list {
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-plate__row {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
}

.page-about .about-plate__row dt {
  font-size: 0.78rem;
  color: var(--rock);
}

.page-about .about-plate__row dd {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-plate__row:last-child dd {
  font-weight: 400;
  color: var(--frame);
}

/* ---------- 双栏主体 ---------- */

.page-about .about-body {
  display: grid;
  gap: 1.8rem;
  padding-top: clamp(1.6rem, 5vw, 3rem);
}

.page-about .about-side__label {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.42rem 0.6rem;
  font-size: 0.84rem;
  color: var(--frame);
  border: 1px solid var(--about-rule);
  background: var(--paper);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  background: var(--paper-deep);
  color: var(--terracotta-deep);
}

.page-about .about-toc__link.is-active {
  background: var(--terracotta);
  color: var(--paper);
  border-color: var(--terracotta-deep);
}

.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-about .about-toc__link.is-active .about-toc__num {
  color: var(--terracotta-soft);
}

.page-about .about-side__note {
  display: none;
  margin-top: 1.1rem;
  padding: 0.8rem 0.9rem;
  border-left: 3px solid var(--ink-green);
  background: var(--paper-deep);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--frame);
}

.page-about .about-side__note p {
  margin: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 1.4rem);
  padding-top: clamp(2rem, 5.5vw, 3rem);
}

.page-about .about-main > .about-section:first-child {
  padding-top: 0;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
}

.page-about .about-section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.4vw, 2.2rem);
  font-weight: 500;
  line-height: 1;
  color: var(--terracotta);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.4vw, 1.8rem);
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: -0.005em;
}

.page-about .about-prose p {
  margin: 0 0 0.9rem;
  max-width: 34em;
  font-size: 0.97rem;
  line-height: 1.9;
  color: var(--frame);
}

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

.page-about .about-callout {
  margin-top: 1.1rem;
  padding: 0.75rem 0.9rem;
  background: var(--paper-deep);
  border-left: 3px solid var(--terracotta);
}

.page-about .about-callout__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--frame);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 1.2rem 0 1.3rem;
  border: var(--line);
  background: var(--warm-gray);
  box-shadow: var(--shadow-hard);
}

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

.page-about .about-figure figcaption {
  padding: 0.55rem 0.8rem;
  border-top: var(--line);
  background: var(--paper);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--rock);
}

/* ---------- 团队卡片 ---------- */

.page-about .about-team {
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team__card {
  position: relative;
  padding: 1rem 1rem 1.1rem;
  background: var(--paper-deep);
  border: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team__tab {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.18rem 0.5rem;
  background: var(--terracotta);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.page-about .about-team__tab--green {
  background: var(--ink-green);
}

.page-about .about-team__title {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--frame);
}

/* ---------- 五道流程 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-flow__item {
  padding: 0.8rem 0.9rem 0.85rem;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--terracotta);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--terracotta-deep);
}

.page-about .about-flow__title {
  margin: 0.1rem 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--frame);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 1.2rem 0 1.4rem;
  padding: 0 0 0 1.5rem;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.34rem;
  top: 0.5rem;
  bottom: 0.6rem;
  width: 3px;
  background: var(--frame);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 1.35rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.52rem;
  top: 0.42rem;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--terracotta);
  border: 2px solid var(--frame);
}

.page-about .about-timeline__year {
  margin: 0 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--terracotta-deep);
}

.page-about .about-timeline__title {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 32em;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--frame);
}

/* ---------- 数据卡 ---------- */

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.9rem 0.85rem 0.95rem;
  background: var(--warm-gray);
  border: var(--line);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.2vw, 1.75rem);
  line-height: 1.1;
  color: var(--ink);
}

.page-about .about-stat__label {
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--frame);
}

.page-about .about-stat__note {
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--rock);
}

@media (hover: hover) {
  .page-about .about-stat:hover {
    background: var(--paper-deep);
    transform: translateY(-2px);
  }
}

.page-about .about-inline-link {
  margin: 1.1rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--frame);
}

/* ---------- 服务原则 ---------- */

.page-about .about-rules {
  list-style: none;
  margin: 1rem 0 1.3rem;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-rules__item {
  padding: 0.85rem 0.9rem;
  background: var(--paper-deep);
  border-left: 3px solid var(--ink-green);
}

.page-about .about-rules__title {
  margin: 0 0 0.3rem;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-rules__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--frame);
}

.page-about .about-contact-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 1rem;
  background: var(--ink-green);
  border: 2px solid var(--frame);
  box-shadow: var(--shadow-hard);
}

.page-about .about-contact-card__key {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--terracotta-soft);
}

.page-about .about-contact-card__value {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: clamp(0.86rem, 2.6vw, 1rem);
  word-break: break-all;
  color: var(--paper);
}

.page-about .about-contact-card__note {
  margin: 0;
  max-width: 30em;
  font-size: 0.76rem;
  line-height: 1.65;
  color: rgba(244, 239, 230, 0.78);
}

.page-about .about-copy.copy-btn {
  flex: 0 0 auto;
  background: var(--paper);
  border: 2px solid var(--frame);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  box-shadow: 3px 3px 0 0 rgba(33, 31, 28, 0.45);
}

.page-about .about-copy.copy-btn:hover,
.page-about .about-copy.copy-btn:focus-visible {
  background: var(--terracotta-soft);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.page-about .about-actions .btn {
  text-decoration: none;
  border-bottom: none;
}

/* ---------- 窄屏收尾 ---------- */

@media (max-width: 420px) {
  .page-about .about-plate__row {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .page-about .about-stats {
    grid-template-columns: 1fr;
  }
}

/* ---------- 中屏 ---------- */

@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: clamp(2.2rem, 4vw, 3.4rem) 0 clamp(2.6rem, 5vw, 4rem);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 3rem;
  }

  .page-about .about-hero::before {
    background: linear-gradient(118deg, var(--paper-deep) 0%, var(--paper-deep) 62%, transparent 62%);
  }

  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 3.4rem;
    align-items: start;
    padding-top: clamp(2.4rem, 4vw, 3.6rem);
  }

  .page-about .about-side {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-about .about-toc {
    display: grid;
    gap: 0;
  }

  .page-about .about-toc__link {
    border: none;
    border-bottom: var(--about-hairline);
    padding: 0.58rem 0.15rem;
    background: transparent;
  }

  .page-about .about-toc__link.is-active {
    background: transparent;
    color: var(--terracotta);
    border-bottom-color: var(--terracotta);
  }

  .page-about .about-toc__link.is-active .about-toc__num {
    color: var(--terracotta-deep);
  }

  .page-about .about-toc__link:hover {
    background: transparent;
    color: var(--ink-green);
  }

  .page-about .about-side__note {
    display: block;
  }

  .page-about .about-prose p {
    font-size: 1rem;
  }

  .page-about .about-figure {
    margin: 1.5rem 0 1.6rem;
  }

  .page-about .about-team {
    gap: 1rem;
  }

  .page-about .about-timeline {
    padding-left: 2rem;
  }

  .page-about .about-timeline__item::before {
    left: -2rem;
    width: 0.8rem;
    height: 0.8rem;
  }

  .page-about .about-timeline::before {
    left: 0.42rem;
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 1120px) {
  .page-about .about-body {
    grid-template-columns: 232px minmax(0, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about a,
  .page-about .about-toc__link,
  .page-about .about-stat {
    transition: none;
  }

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