.page-about {
  --about-deep: #0A1128;
  --about-panel: #10203A;
  --about-cream: #F5F0E6;
  --about-gold: #D4AF37;
  --about-red: #E63946;
  --about-line: #3A4A5A;
  --about-gray: #B0B7C3;
  --about-accent: #00A8E8;
  background: var(--about-deep);
  color: var(--about-cream);
  font-family: var(--font-body);
  line-height: var(--line-h);
  overflow-x: hidden;
}

/* ===== 页头区域 ===== */
.page-about .story-header {
  position: relative;
  padding: var(--space-2) var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--about-line);
  background:
    linear-gradient(140deg, rgba(16, 32, 58, 0.88) 0%, rgba(10, 17, 40, 0.98) 72%),
    repeating-linear-gradient(135deg, transparent 0 14px, rgba(58, 74, 90, 0.16) 14px 15px);
}

.page-about .breadcrumb {
  margin: 0 auto var(--space-3);
  max-width: var(--container-w);
}

.page-about .story-header-grid {
  display: grid;
  gap: var(--space-3);
  max-width: var(--container-w);
  margin: 0 auto;
  position: relative;
}

.page-about .story-header-index {
  display: flex;
  align-items: flex-start;
  gap: var(--space-1);
  pointer-events: none;
}

.page-about .story-header-num {
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 14vw, 7rem);
  font-style: italic;
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 2px var(--about-gold);
  text-stroke: 2px var(--about-gold);
}

.page-about .story-header-note {
  writing-mode: vertical-rl;
  font-size: var(--fs-label);
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--about-gray);
  padding-top: 0.25rem;
}

.page-about .story-header-copy {
  max-width: 46em;
}

.page-about .story-header-kicker {
  font-size: var(--fs-small);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--about-gold);
  margin: 0 0 var(--space-1);
}

.page-about .story-header-title {
  font-family: var(--font-display);
  font-size: var(--fs-title);
  font-style: italic;
  font-weight: 700;
  line-height: var(--line-h-tight);
  margin: 0 0 var(--space-2);
}

.page-about .story-header-desc {
  font-size: var(--fs-body);
  color: var(--about-gray);
  max-width: 40em;
  margin: 0;
}

/* ===== 章节通用结构 ===== */
.page-about .story-section {
  position: relative;
  padding: var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--about-line);
}

.page-about .story-section-inner {
  max-width: var(--container-w);
  margin: 0 auto;
}

.page-about .story-section-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-about .story-section-num {
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 9vw, 5.5rem);
  font-style: italic;
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--about-gold);
  flex-shrink: 0;
  opacity: 0.92;
}

.page-about .story-section-titling {
  border-left: 2px solid var(--about-line);
  padding-left: var(--space-2);
  margin-top: 0.35rem;
}

.page-about .story-section-title {
  font-family: var(--font-display);
  font-size: var(--fs-title);
  font-style: italic;
  font-weight: 700;
  line-height: var(--line-h-tight);
  margin: 0 0 0.2rem;
}

.page-about .story-section-en {
  font-size: var(--fs-label);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--about-gray);
}

/* ===== 01 我们是谁 ===== */
.page-about .story-intro-grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .story-intro-copy p {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-body);
  color: var(--about-cream);
}

.page-about .story-quote {
  margin: var(--space-3) 0 0;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  border-left: 3px solid var(--about-gold);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.1), transparent 70%);
}

.page-about .story-quote p {
  margin: 0;
  font-size: var(--fs-subtitle);
  font-family: var(--font-display);
  font-style: italic;
  line-height: var(--line-h-tight);
  color: var(--about-cream);
}

.page-about .story-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin: 0;
}

.page-about .story-stat-item {
  background: var(--about-panel);
  padding: var(--space-2);
  display: flex;
  flex-direction: column-reverse;
  gap: 0.4rem;
  transition: background var(--transition-fast);
}

.page-about .story-stat-item:hover,
.page-about .story-stat-item:focus-within {
  background: #152A49;
}

.page-about .story-stat-item dt {
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--about-gray);
}

.page-about .story-stat-item dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  font-style: italic;
  font-weight: 700;
  line-height: 1;
  color: var(--about-gold);
}

.page-about .story-stat-item dd sup {
  font-size: 0.5em;
  color: var(--about-accent);
}

/* ===== 02 发展里程碑 ===== */
.page-about .story-milestone-layout {
  display: grid;
  gap: var(--space-3);
}

.page-about .story-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--about-line);
  position: relative;
}

.page-about .story-timeline-item {
  position: relative;
  padding: 0 0 var(--space-3) var(--space-3);
  transition: background var(--transition-fast);
}

.page-about .story-timeline-item::before {
  content: "";
  position: absolute;
  left: -0.625rem;
  top: 0.25rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--about-deep);
  border: 2px solid var(--about-gold);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.page-about .story-timeline-item:hover,
.page-about .story-timeline-item:focus-visible {
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.08), transparent 75%);
  outline: none;
}

.page-about .story-timeline-item:hover::before,
.page-about .story-timeline-item:focus-visible::before {
  background: var(--about-gold);
  transform: scale(1.15);
}

.page-about .story-timeline-mark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--about-gold);
  border: 1px solid var(--about-gold);
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.5rem;
  background: rgba(212, 175, 55, 0.05);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.page-about .story-timeline-item:hover .story-timeline-mark,
.page-about .story-timeline-item:focus-visible .story-timeline-mark {
  background: var(--about-gold);
  color: var(--about-deep);
}

.page-about .story-timeline-body h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  margin: 0 0 0.3rem;
}

.page-about .story-timeline-body p {
  margin: 0;
  font-size: var(--fs-small);
  color: var(--about-gray);
}

.page-about .story-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .story-milestone-figure {
  margin: var(--space-2) 0 0;
  border: 1px solid var(--about-line);
  background: var(--about-panel);
}

.page-about .story-milestone-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-bottom: 1px solid var(--about-line);
}

.page-about .story-milestone-figure figcaption {
  padding: var(--space-1) var(--space-2);
  font-size: var(--fs-label);
  color: var(--about-gray);
  letter-spacing: 0.08em;
}

/* ===== 03 团队与数据 ===== */
.page-about .story-team-layout {
  display: grid;
  gap: var(--space-3);
}

.page-about .story-team-copy p {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-body);
  color: var(--about-cream);
}

.page-about .story-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

.page-about .story-team-panel {
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--about-gold);
  background: var(--about-panel);
  padding: var(--space-2);
}

.page-about .story-team-panel-title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-label);
  letter-spacing: 0.28em;
  color: var(--about-gray);
  text-transform: uppercase;
  border-bottom: 1px solid var(--about-line);
  padding-bottom: var(--space-1);
}

.page-about .story-team-rows {
  margin: 0;
}

.page-about .story-team-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--about-line);
  transition: padding-left var(--transition-fast), border-color var(--transition-fast);
}

.page-about .story-team-row:last-child {
  border-bottom: 0;
}

.page-about .story-team-row:hover {
  padding-left: 0.4rem;
  border-bottom-color: var(--about-gold);
}

.page-about .story-team-row dt {
  font-size: var(--fs-small);
  color: var(--about-gray);
}

.page-about .story-team-row dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-style: italic;
  font-weight: 700;
  color: var(--about-cream);
}

.page-about .story-team-row dd sup {
  font-size: 0.6em;
  color: var(--about-accent);
}

.page-about .story-team-figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--about-line);
}

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

.page-about .story-team-figure figcaption {
  padding: var(--space-1) var(--space-2);
  font-size: var(--fs-label);
  color: var(--about-gray);
  border-top: 1px solid var(--about-line);
  background: var(--about-panel);
}

/* ===== 04 资质与合作 ===== */
.page-about .story-credential-layout {
  display: grid;
  gap: var(--space-3);
  align-items: center;
}

.page-about .story-credential-badge {
  margin: 0 auto;
  width: min(100%, 220px);
  text-align: center;
}

.page-about .story-credential-badge img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 2px solid var(--about-gold);
  background: var(--about-panel);
  padding: 0.6rem;
  box-sizing: border-box;
}

.page-about .story-credential-badge figcaption {
  margin-top: 0.5rem;
  font-size: var(--fs-small);
  letter-spacing: 0.14em;
  color: var(--about-gold);
}

.page-about .story-credential-copy p {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-body);
  color: var(--about-cream);
}

.page-about .story-credential-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: var(--space-2) 0 0;
}

/* ===== 底部翻页 ===== */
.page-about .story-paging {
  padding: var(--space-3) var(--space-3) var(--space-5);
}

.page-about .story-paging-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .story-paging-label,
.page-about .story-paging a {
  display: block;
  background: var(--about-deep);
  padding: var(--space-2);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.page-about .story-paging-label {
  font-size: var(--fs-label);
  letter-spacing: 0.34em;
  color: var(--about-gray);
  text-transform: uppercase;
  border-bottom: 1px solid var(--about-line);
}

.page-about .story-paging a {
  font-size: var(--fs-subtitle);
  font-style: italic;
  font-weight: 700;
  color: var(--about-cream);
  border-bottom: 1px solid var(--about-line);
}

.page-about .story-paging a:last-child {
  border-bottom: 0;
}

.page-about .story-paging a:hover {
  background: var(--about-gold);
  color: var(--about-deep);
}

/* ===== 移动端及以上（>768） ===== */
@media (min-width: 768px) {
  .page-about .story-header {
    padding-top: var(--space-4);
    padding-bottom: var(--space-6);
  }

  .page-about .story-header-grid {
    grid-template-columns: auto 1fr;
    gap: var(--space-4);
    align-items: end;
  }

  .page-about .story-header-num {
    font-size: clamp(6rem, 12vw, 9rem);
  }

  .page-about .story-header-desc {
    font-size: 0.9375rem;
  }

  .page-about .story-section {
    padding: var(--space-5) var(--space-3);
  }

  .page-about .story-section-head {
    margin-bottom: var(--space-4);
  }

  .page-about .story-intro-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-about .story-stats {
    grid-template-columns: 1fr;
    align-self: start;
  }

  .page-about .story-stat-item {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
    padding: var(--space-2) var(--space-3);
  }

  .page-about .story-stat-item dt {
    flex-shrink: 0;
  }

  .page-about .story-milestone-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-about .story-milestone {
    padding-right: var(--space-4);
  }

  .page-about .story-milestone-figure {
    margin: 0;
    position: sticky;
    top: calc(var(--header-h) + var(--header-offset) * 2 + 1rem);
  }

  .page-about .story-team-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    gap: var(--space-4);
  }

  .page-about .story-team {
    padding-left: var(--space-4);
  }

  .page-about .story-team-figure {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .page-about .story-team-figure img {
    max-height: 320px;
    object-fit: cover;
  }

  .page-about .story-team-figure figcaption {
    border-top: 0;
    border-left: 1px solid var(--about-line);
    writing-mode: vertical-rl;
    padding: var(--space-2) var(--space-1);
    letter-spacing: 0.2em;
  }

  .page-about .story-credential-layout {
    grid-template-columns: minmax(180px, 0.5fr) minmax(0, 1fr);
    gap: var(--space-4);
  }

  .page-about .story-credentials {
    padding-right: var(--space-4);
  }

  .page-about .story-paging-inner {
    grid-template-columns: auto 1fr 1fr 1fr;
    align-items: stretch;
    gap: 1px;
  }

  .page-about .story-paging-label,
  .page-about .story-paging a,
  .page-about .story-paging a:last-child {
    border-bottom: 0;
    border-right: 1px solid var(--about-line);
  }

  .page-about .story-paging a:last-child {
    border-right: 0;
  }
}

/* ===== 桌面端（>1024） ===== */
@media (min-width: 1024px) {
  .page-about .story-header-grid {
    grid-template-columns: minmax(300px, 0.9fr) 1fr;
    gap: var(--space-5);
  }

  .page-about .story-section {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }

  .page-about .story-section-inner {
    position: relative;
  }

  .page-about .story-section-num {
    font-size: 5.5rem;
  }

  .page-about .story-intro-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: var(--space-5);
  }

  .page-about .story-milestone-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: var(--space-5);
  }

  .page-about .story-team-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.65fr);
    gap: var(--space-4) var(--space-5);
  }

  .page-about .story-credential-layout {
    grid-template-columns: minmax(220px, 0.4fr) minmax(0, 1fr);
    gap: var(--space-5);
  }
}