.page-about {
  --about-line: 2px solid var(--ink);
  --about-shadow: 6px 6px 0 var(--ink);
  --about-cta-line: #3B3026;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

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

.page-about a:focus-visible,
.page-about .about-rail__link:focus-visible {
  outline: 3px solid var(--cinnabar);
  outline-offset: 3px;
}

.page-about .about-topline {
  padding-top: clamp(14px, 3vw, 26px);
}

.page-about .breadcrumbs a {
  color: var(--ink);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(18px, 3.6vw, 40px) 0 clamp(28px, 5vw, 56px);
  background: linear-gradient(180deg, var(--paper-soft) 0%, var(--paper) 78%);
  border-bottom: var(--about-line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 7.4vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 10px 0 18px;
}

.page-about .about-hero__lede {
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 44em;
  margin: 0 0 22px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  border-top: 3px solid var(--ink);
  padding-top: 16px;
}

.page-about .about-figures__item {
  border-left: 1px solid var(--paper-deep);
  padding-left: 10px;
  min-width: 0;
}

.page-about .about-figures__item:first-child {
  border-left: 0;
  padding-left: 0;
}

.page-about .about-figures__num {
  font-family: var(--font-display);
  font-size: clamp(24px, 4.6vw, 36px);
  font-weight: 900;
  line-height: 1;
  color: var(--cinnabar);
}

.page-about .about-figures__num small {
  font-family: var(--font-body);
  font-size: 0.42em;
  font-weight: 600;
  color: var(--ink);
  margin-left: 4px;
}

.page-about .about-figures__label {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.45;
  color: var(--muted);
}

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

.page-about .about-hero__figure .media-frame {
  border: var(--about-line);
  box-shadow: 8px 8px 0 var(--gold);
  background: var(--paper-deep);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-hero__figure .media-frame__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* 左侧年份门廊 + 右侧档案 */
.page-about .about-layout {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(28px, 5vw, 52px);
}

.page-about .about-rail {
  border: var(--about-line);
  background: var(--paper-soft);
  padding: 16px;
  box-shadow: var(--about-shadow);
  align-self: start;
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cinnabar-deep);
  margin: 0 0 12px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .about-rail__link {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border: 2px solid var(--ink);
  background: var(--paper);
  padding: 8px 10px;
  transition: background 0.18s ease, color 0.18s ease;
}

.page-about .about-rail__year {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.1;
}

.page-about .about-rail__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--muted);
  margin-top: 3px;
}

.page-about .about-rail__link:hover {
  background: var(--paper-deep);
}

.page-about .about-rail__link.is-active {
  background: var(--ink);
  border-color: var(--ink);
}

.page-about .about-rail__link.is-active .about-rail__year {
  color: var(--gold-bright);
}

.page-about .about-rail__link.is-active .about-rail__label {
  color: var(--paper-deep);
}

.page-about .about-rail__note {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--paper-deep);
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

/* 章节骨架 */
.page-about .about-section {
  margin-bottom: clamp(38px, 6vw, 66px);
  scroll-margin-top: 110px;
}

.page-about .about-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  border-bottom: 3px solid var(--ink);
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1.2;
  color: var(--cinnabar-deep);
  border: 2px solid var(--cinnabar);
  padding: 2px 6px;
}

.page-about .about-section__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 38px);
  font-weight: 800;
  line-height: 1.22;
  margin: 0;
}

.page-about .about-section p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.page-about .about-section h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.6vw, 22px);
  font-weight: 800;
  line-height: 1.35;
  margin: 0 0 8px;
}

/* 常用路径 */
.page-about .path-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .path-list__item {
  display: grid;
  grid-template-columns: 4.2em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--paper-deep);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .path-list__key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cinnabar-deep);
  white-space: nowrap;
}

/* 年表 */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .timeline__item {
  background: var(--paper-soft);
  border: var(--about-line);
  border-left: 10px solid var(--cinnabar);
  padding: 14px 16px;
  box-shadow: 4px 4px 0 var(--ink);
  scroll-margin-top: 110px;
}

.page-about .timeline__year {
  font-family: var(--font-display);
  font-size: clamp(26px, 5vw, 36px);
  font-weight: 900;
  line-height: 1;
  color: var(--cinnabar);
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  margin: 0;
}

.page-about .timeline__content {
  margin-top: 6px;
}

.page-about .timeline__item p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 空间与服务 */
.page-about .space-intro {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: baseline;
  margin-bottom: 16px;
  padding: 14px 16px;
  background: var(--ink);
  color: var(--paper);
  border: var(--about-line);
}

.page-about .space-intro__stat {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--gold-bright);
}

.page-about .space-intro__stat small {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--paper-deep);
  margin-left: 5px;
}

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

.page-about .space-item {
  border: var(--about-line);
  background: var(--paper-soft);
  padding: 16px;
  box-shadow: 4px 4px 0 var(--paper-deep);
}

.page-about .space-item p {
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
}

.page-about .space-item--feature {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 6px 6px 0 var(--gold);
}

.page-about .space-item--feature h3 {
  color: var(--paper);
}

.page-about .space-item--feature p {
  color: var(--paper-deep);
}

.page-about .space-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.page-about .space-item--feature .tag {
  background: transparent;
  color: var(--gold-bright);
  border-color: var(--gold-bright);
}

/* 团队 */
.page-about .team-figures {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
}

.page-about .team-figure {
  border-top: 3px solid var(--ink);
  padding-top: 8px;
}

.page-about .team-figure__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(26px, 5.4vw, 40px);
  font-weight: 900;
  line-height: 1;
  color: var(--jade);
}

.page-about .team-figure__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  margin-top: 5px;
}

.page-about .team-split {
  display: grid;
  gap: 20px;
}

.page-about .team-media,
.page-about .partner-media {
  margin: 0;
}

.page-about .team-media .media-frame {
  border: var(--about-line);
  background: var(--paper-deep);
  overflow: hidden;
}

.page-about .team-media img,
.page-about .partner-media img {
  width: 100%;
  object-fit: cover;
}

.page-about .team-media .media-frame__caption,
.page-about .partner-media .media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* 合作生态 */
.page-about .partner-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .partner-stat {
  background: var(--paper-deep);
  border: var(--about-line);
  padding: 12px 8px;
  text-align: center;
}

.page-about .partner-stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 32px);
  font-weight: 900;
  line-height: 1;
  color: var(--cinnabar-deep);
}

.page-about .partner-stat__num small {
  font-size: 0.5em;
  margin-left: 2px;
}

.page-about .partner-stat__label {
  display: block;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-soft);
  margin-top: 6px;
}

.page-about .partner-cloud {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .partner-chip {
  border: 2px solid var(--ink);
  background: var(--paper);
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .partner-chip:nth-child(3n + 1) {
  background: var(--gold-bright);
}

.page-about .partner-chip:nth-child(3n + 2) {
  background: var(--jade-light);
}

.page-about .partner-media {
  margin-bottom: 22px;
}

.page-about .partner-media .media-frame {
  border: var(--about-line);
  box-shadow: 6px 6px 0 var(--cinnabar);
  background: var(--ink);
  overflow: hidden;
}

.page-about .honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .honor-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .honor-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--cinnabar);
}

/* 服务准则 */
.page-about .creed {
  margin: 0 0 22px;
  border-left: 6px solid var(--cinnabar);
  padding: 4px 0 4px 18px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 26px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--ink);
}

.page-about .creed-list {
  list-style: none;
  counter-reset: creed;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .creed-list > li {
  counter-increment: creed;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  border-bottom: 1px solid var(--paper-deep);
  padding-bottom: 14px;
}

.page-about .creed-list > li::before {
  content: counter(creed, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cinnabar-deep);
  padding-top: 4px;
}

.page-about .creed-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 4px;
}

.page-about .creed-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 联系入口 */
.page-about .about-cta {
  margin-top: clamp(26px, 4.5vw, 44px);
  background: var(--ink);
  color: var(--paper);
  border: var(--about-line);
  box-shadow: 8px 8px 0 var(--cinnabar);
  padding: clamp(20px, 4vw, 36px);
  display: grid;
  gap: 22px;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--gold-bright);
}

.page-about .about-cta p {
  color: var(--paper-deep);
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 16px;
}

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

.page-about .about-cta__row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-top: 1px solid var(--about-cta-line);
}

.page-about .about-cta__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-cta__value {
  font-size: 14px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

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

.page-about .about-cta__link {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 2px solid var(--gold-bright);
  padding-bottom: 2px;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-cta__link:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* 平板 */
@media (min-width: 640px) {
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-about .timeline__content {
    margin-top: 0;
    border-left: 1px solid var(--paper-deep);
    padding-left: 16px;
  }

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

  .page-about .team-split {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

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

  .page-about .space-item--feature {
    grid-column: span 2;
  }

  .page-about .about-cta {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 28px;
    align-items: start;
  }

  .page-about .about-cta__actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 桌面：左侧年份门廊固定 */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }

  .page-about .about-layout {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

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

  .page-about .about-rail__year {
    font-size: 28px;
  }

  .page-about .space-intro {
    gap: 10px 30px;
  }
}

@media (min-width: 1120px) {
  .page-about .timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    padding: 18px 20px;
  }

  .page-about .timeline__year {
    font-size: 44px;
  }
}
<<<END>>>