.page-about {
  --about-gap: clamp(16px, 3vw, 28px);
  --about-dark-line: rgba(200, 169, 106, 0.22);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumbs {
  margin: clamp(14px, 2vw, 22px) 0 clamp(14px, 2vw, 20px);
}

.page-about .about-hero {
  position: relative;
  margin-top: 4px;
  padding: clamp(28px, 5vw, 56px) 0 clamp(20px, 3vw, 32px);
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 62%, var(--navy-3) 100%);
  color: var(--cream);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-dark-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-dark-line) 1px, transparent 1px);
  background-size: 58px 58px;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 169, 106, 0.28), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-hero .eyebrow {
  color: var(--gold-soft);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.4vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: 0.005em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: rgba(247, 244, 238, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-gold);
  box-shadow: 0 18px 40px rgba(4, 12, 22, 0.45);
  aspect-ratio: 3 / 2;
  background: var(--navy-2);
}

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

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(18px, 3vw, 24px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: rgba(247, 244, 238, 0.62);
}

/* ---------- 定位与起点 ---------- */
.page-about .about-origin__body p {
  margin: 14px 0 0;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-origin__body .lede {
  color: var(--ink);
}

.page-about .about-origin__body .link-arrow {
  margin-top: 22px;
  display: inline-block;
}

.page-about .about-origin__aside {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: clamp(20px, 3.4vw, 30px);
}

.page-about .about-origin__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-audience {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-audience__item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.page-about .about-audience__item .mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--gold);
  padding-top: 2px;
}

.page-about .about-audience__item strong {
  display: block;
  font-size: 0.98rem;
  color: var(--navy);
  margin-bottom: 4px;
}

.page-about .about-audience__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 发展历程时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold) 0%, rgba(200, 169, 106, 0.18) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 34px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--gold);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--gold);
  transform: scale(1.12);
}

.page-about .about-timeline__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .about-timeline__card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.6vw, 22px);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-timeline__card:hover {
  transform: translateY(-3px);
  border-color: var(--line-gold);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-history__fig {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-history__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-about .about-history__fig figcaption {
  margin-top: 10px;
  font-size: 0.8125rem;
  color: var(--stone);
  line-height: 1.6;
}

/* ---------- 四条内容线 ---------- */
.page-about .about-systems {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-system {
  display: flex;
  flex-direction: column;
  background: var(--paper);
}

.page-about .about-system .card__body {
  flex: 1;
  color: var(--ink-soft);
  line-height: 1.8;
  font-size: 0.94rem;
}

.page-about .about-system .link-arrow {
  margin-top: 14px;
  align-self: flex-start;
  font-size: 0.875rem;
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 36px);
  margin-top: clamp(22px, 3.5vw, 32px);
}

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

.page-about .about-team__card {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: start;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.6vw, 22px);
}

.page-about .about-team__no {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1.3;
}

.page-about .about-team__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-team__fig {
  margin: 0 0 18px;
}

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-about .about-team__rhythm-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--navy);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-rhythm__item {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-rhythm__key {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--clay);
  letter-spacing: 0.06em;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scope__panel {
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy-2) 58%, var(--navy-3) 100%);
  color: var(--cream);
  border-radius: var(--radius-xl);
  padding: clamp(24px, 4.5vw, 48px);
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-scope .eyebrow {
  color: var(--gold-soft);
}

.page-about .about-scope .section-title {
  color: var(--cream);
  margin-bottom: 12px;
}

.page-about .about-scope__head p:not(.eyebrow) {
  margin: 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(247, 244, 238, 0.78);
}

.page-about .about-numbers {
  list-style: none;
  margin: 0 0 clamp(22px, 3.5vw, 30px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
}

.page-about .about-number {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 12px;
  border-left: 2px solid var(--line-gold);
  min-width: 0;
}

.page-about .about-number__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-number__label {
  font-size: 0.8125rem;
  color: rgba(247, 244, 238, 0.62);
  line-height: 1.5;
}

.page-about .about-dots {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 6px;
  max-width: 320px;
}

.page-about .about-dot {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: 4px;
  background: rgba(200, 169, 106, 0.16);
  border: 1px solid rgba(200, 169, 106, 0.34);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-dot:hover {
  background: var(--gold);
  transform: scale(1.14);
}

.page-about .about-dots__caption {
  margin: 14px 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(247, 244, 238, 0.6);
  max-width: 34ch;
}

/* ---------- 纠错与版本 ---------- */
.page-about .about-quality__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .about-rule {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cinnabar);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-rule h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-rule p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-rule .link-arrow {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.875rem;
}

/* ---------- 联络 ---------- */
.page-about .about-contact__panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: clamp(22px, 4vw, 40px);
  display: grid;
  gap: clamp(22px, 3.5vw, 36px);
}

.page-about .about-contact__text p:not(.eyebrow) {
  margin: 0 0 20px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 46ch;
}

.page-about .about-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-contact__label {
  width: 100%;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-contact__value {
  font-size: 1rem;
  color: var(--navy);
  word-break: break-all;
}

.page-about .about-contact__value.mono {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  letter-spacing: 0.01em;
}

.page-about .about-contact__note {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--stone);
  max-width: 70ch;
}

/* ---------- 窄屏保护 ---------- */
.page-about .about-hero,
.page-about .about-scope__panel,
.page-about .about-contact__panel {
  max-width: 100%;
}

.page-about .about-timeline__card,
.page-about .about-team__card,
.page-about .about-rule {
  overflow-wrap: anywhere;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-contact__row {
    display: grid;
    grid-template-columns: 92px 1fr auto;
    align-items: center;
  }

  .page-about .about-contact__label {
    width: auto;
  }
}

/* ---------- 桌面：时间轴左置，卡片右列 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-facts {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-timeline::before {
    left: 87px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 44px;
    padding-left: 0;
    margin-bottom: clamp(22px, 3vw, 30px);
  }

  .page-about .about-timeline__item::before {
    left: 78px;
    top: 12px;
    width: 18px;
    height: 18px;
  }

  .page-about .about-timeline__year {
    margin: 6px 0 0;
    text-align: right;
  }

  .page-about .about-timeline__card {
    padding: clamp(20px, 2.4vw, 26px);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    margin-left: 44px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-scope__panel {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

@media (min-width: 1100px) {
  .page-about .about-systems {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-numbers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px 18px;
  }
}

/* ---------- 动效退化 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__card,
  .page-about .about-timeline__item::before,
  .page-about .about-dot {
    transition: none;
  }

  .page-about .about-timeline__card:hover,
  .page-about .about-timeline__item:hover::before,
  .page-about .about-dot:hover {
    transform: none;
  }
}
<<<END>>>