.page-about {
  --about-line: rgba(201, 162, 75, 0.4);
  --about-muted: rgba(245, 241, 232, 0.76);
  --about-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ========== 首屏 Masthead ========== */
.about-masthead {
  background: var(--depth);
  color: var(--light);
  padding: calc(var(--header-h) + 3rem) 0 4rem;
  position: relative;
  overflow: hidden;
}
.about-masthead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--gold) 0 34%, var(--ember) 34% 52%, transparent 52%);
  opacity: 0.72;
}
.about-masthead .breadcrumb {
  color: var(--about-muted);
  margin: 0 0 2.75rem;
  padding: 0;
}
.about-masthead .breadcrumb a {
  color: var(--light);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 241, 232, 0.38);
  transition: color 0.25s var(--about-ease), border-color 0.25s var(--about-ease);
}
.about-masthead .breadcrumb a:hover {
  color: var(--gold);
  border-color: var(--gold);
}
.about-masthead-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}
.about-masthead-intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.about-masthead .eyebrow {
  color: var(--gold);
}
.about-masthead h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 5.2vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--light);
  margin: 0.85rem 0 1.35rem;
  max-width: 11em;
}
.about-lead {
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--about-muted);
  max-width: 36em;
  margin: 0;
}
.about-fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin: 2.2rem 0 0;
  padding: 0;
}
.about-fact {
  border-left: 3px solid var(--gold);
  padding-left: 1rem;
}
.about-fact dt {
  font-family: var(--font-heading);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--about-muted);
}
.about-fact dd {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--light);
  line-height: 1.15;
  margin: 0.3rem 0 0;
}
.about-masthead-visual {
  position: relative;
}
.about-masthead-visual .img-frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--ink);
  box-shadow: 14px 16px 0 rgba(201, 162, 75, 0.22);
}
.about-masthead-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
@media (min-width: 900px) {
  .about-masthead {
    padding-top: calc(var(--header-h) + 4.25rem);
    padding-bottom: 5.5rem;
  }
  .about-masthead-grid {
    grid-template-columns: 1.06fr 0.94fr;
    gap: 4.5rem;
  }
  .about-masthead-visual .img-frame {
    margin-right: 1.5rem;
  }
}

/* ========== 品牌叙事时间线 ========== */
.about-journey {
  background:
    linear-gradient(rgba(26, 26, 26, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 26, 26, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 2.5rem 2.5rem;
  padding: 4.25rem 0;
}
.about-journey .chapter-head {
  border-bottom: 3px solid var(--depth);
  padding-bottom: 1.5rem;
}
.chapter-head-text {
  min-width: 0;
}
.chapter-head .chapter-index {
  color: var(--gold);
  font-family: var(--font-heading);
  font-weight: 700;
}
.about-section-lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate);
  max-width: 48em;
  margin: 2rem 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--gold);
}
.about-timeline {
  margin-top: 3rem;
  border-top: 4px solid var(--depth);
}
.timeline-item {
  position: relative;
  padding: 1.75rem 0;
  border-bottom: 2px solid rgba(26, 26, 26, 0.12);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
.timeline-side {
  order: -1;
}
.timeline-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--depth);
  background: var(--gold);
  padding: 0.4rem 0.95rem;
  border: 2px solid var(--depth);
  box-shadow: 3px 3px 0 var(--depth);
}
.timeline-tag--gold {
  background: var(--ember);
  color: var(--light);
}
.timeline-panel {
  position: relative;
  background: var(--light);
  border: 3px solid var(--depth);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  padding: 1.5rem 1.5rem 1.4rem;
  transition: transform 0.35s var(--about-ease), box-shadow 0.35s var(--about-ease);
}
.timeline-panel:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.14);
}
.timeline-index {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--gold);
  color: var(--depth);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  margin-bottom: 0.7rem;
}
.timeline-panel h3 {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  line-height: 1.35;
  color: var(--depth);
  margin: 0 0 0.4rem;
}
.timeline-panel p {
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--slate);
  margin: 0;
}
.timeline-panel--highlight {
  background: var(--depth);
  border-color: var(--gold);
  box-shadow: 0 10px 26px rgba(10, 26, 47, 0.3);
}
.timeline-panel--highlight h3 {
  color: var(--light);
}
.timeline-panel--highlight p {
  color: var(--about-muted);
}
.timeline-item--current .timeline-tag {
  box-shadow: 3px 3px 0 var(--ember);
}
.timeline-item:nth-child(2) {
  --reveal-delay: 0.06s;
}
.timeline-item:nth-child(3) {
  --reveal-delay: 0.12s;
}
.timeline-item:nth-child(4) {
  --reveal-delay: 0.18s;
}
.timeline-item:nth-child(5) {
  --reveal-delay: 0.24s;
}
.timeline-item:nth-child(6) {
  --reveal-delay: 0.3s;
}
@media (min-width: 860px) {
  .about-journey {
    padding: 6rem 0;
  }
  .about-timeline {
    position: relative;
    margin-top: 4rem;
    border-top: none;
  }
  .about-timeline::before {
    content: "";
    position: absolute;
    left: 7.5rem;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--about-line);
    border-radius: 999px;
  }
  .timeline-item {
    grid-template-columns: 7.5rem 1fr;
    column-gap: 3.5rem;
    padding: 2.4rem 0;
    border-bottom: 2px solid rgba(26, 26, 26, 0.08);
  }
  .timeline-side {
    order: 0;
    text-align: right;
    position: relative;
    z-index: 2;
  }
  .timeline-tag {
    transform: translateY(0.15rem);
  }
  .timeline-item::before {
    content: "";
    position: absolute;
    left: calc(7.5rem - 0.75rem);
    top: 2.35rem;
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 50%;
    background: var(--paper);
    border: 4px solid var(--gold);
    z-index: 2;
  }
  .timeline-item--current::before {
    background: var(--gold);
    border-color: var(--ember);
  }
  .timeline-panel {
    margin-left: 0.5rem;
  }
}

/* ========== 数据概况 ========== */
.page-about .section--dark {
  padding: 4.5rem 0;
}
.page-about .section--dark .chapter-head .eyebrow {
  color: var(--gold);
}
.page-about .section--dark .chapter-head h2 {
  color: var(--light);
}
.page-about .section--dark .chapter-head .chapter-index {
  color: var(--gold);
}
.about-stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}
.about-stat-card {
  background: rgba(255, 255, 255, 0.045);
  border: 2px solid rgba(201, 162, 75, 0.42);
  padding: 2rem 1.5rem 1.75rem;
  position: relative;
  transition: transform 0.35s var(--about-ease), box-shadow 0.35s var(--about-ease), border-color 0.35s var(--about-ease);
}
.about-stat-card:hover,
.about-stat-card:focus-within {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
}
.stat-icon {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-bottom: 1.15rem;
}
.stat-glyph {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 1rem;
}
.stat-glyph:not(:empty) {
  min-height: 2.1rem;
}
.stat-value {
  font-family: var(--font-heading);
  font-size: clamp(2.35rem, 5vw, 3.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}
.stat-suffix {
  font-size: 0.55em;
  margin-left: 0.12em;
  color: var(--light);
}
.stat-label {
  margin-top: 0.6rem;
  font-family: var(--font-heading);
  font-size: 0.94rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
}
@media (min-width: 680px) {
  .about-stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .about-stat-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .about-stat-card {
    padding: 2.4rem 2rem 2rem;
  }
  .page-about .section--dark {
    padding: 6rem 0;
  }
}

/* ========== 资质与认证 ========== */
.about-honors {
  background: var(--paper);
  padding: 4.5rem 0;
}
.about-honors .chapter-head {
  border-bottom: 3px solid var(--depth);
  padding-bottom: 1.5rem;
}
.honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 3rem;
}
.honor-badge {
  background: var(--light);
  border: 3px solid var(--depth);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12), 8px 10px 0 var(--terra);
  padding: 2.25rem 1.5rem 2rem;
  text-align: center;
  transition: transform 0.3s var(--about-ease), box-shadow 0.3s var(--about-ease);
}
.honor-badge:hover {
  transform: translate(4px, 4px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08), 4px 6px 0 var(--terra);
}
.honor-icon {
  display: block;
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin: 0 auto 1.25rem;
}
.honor-seal {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--depth);
  color: var(--gold);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  border: 3px solid var(--gold);
  margin: 0 auto 1.25rem;
}
.honor-seal--gold {
  background: var(--gold);
  color: var(--depth);
  border-color: var(--depth);
}
.honor-badge h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--depth);
  margin: 0 0 0.55rem;
}
.honor-badge p {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--slate);
  max-width: 32em;
  margin: 0 auto;
}
@media (min-width: 900px) {
  .about-honors {
    padding: 6rem 0;
  }
  .honor-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.25rem;
  }
}

/* ========== 团队与价值观 ========== */
.about-team {
  background:
    radial-gradient(circle at 92% 8%, rgba(201, 162, 75, 0.16), transparent 30%),
    linear-gradient(rgba(26, 26, 26, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 26, 26, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 2rem 2rem, 2rem 2rem;
  padding: 4.5rem 0;
}
.about-team .chapter-head {
  border-bottom: 3px solid var(--depth);
  padding-bottom: 1.5rem;
}
.about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 3rem;
}
.about-team-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}
.about-team-intro {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate);
  margin: 0;
  max-width: 46em;
}
.page-about .note {
  margin: 0;
}
.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 3px solid var(--depth);
}
.value-item {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1.3rem 0;
  border-bottom: 2px solid rgba(26, 26, 26, 0.12);
}
.value-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--gold);
}
.value-item h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--depth);
  margin: 0 0 0.3rem;
}
.value-item p {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--slate);
  margin: 0;
}
@media (min-width: 900px) {
  .about-team {
    padding: 6rem 0;
  }
  .about-team-grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 4.5rem;
    margin-top: 4rem;
  }
  .value-item {
    grid-template-columns: 4rem 1fr;
    padding: 1.5rem 0;
  }
}

/* ========== 底部继续探索 ========== */
.about-forward {
  background: var(--depth);
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
}
.about-forward::before {
  content: "";
  position: absolute;
  right: -7rem;
  top: -7rem;
  width: 20rem;
  height: 20rem;
  border: 3px solid rgba(201, 162, 75, 0.22);
  border-radius: 50%;
}
.about-forward::after {
  content: "";
  position: absolute;
  left: -4rem;
  bottom: -6rem;
  width: 13rem;
  height: 13rem;
  border: 3px solid rgba(210, 105, 30, 0.28);
  border-radius: 50%;
}
.about-forward-card {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--light);
}
.about-forward-card .eyebrow {
  color: var(--gold);
}
.about-forward-card h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  line-height: 1.25;
  margin: 0.75rem 0 1rem;
}
.about-forward-card p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-muted);
  max-width: 40em;
  margin: 0 auto 2rem;
}
.about-forward-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}
.about-ghost-btn {
  background: transparent;
  color: var(--light);
  border: 2px solid rgba(201, 162, 75, 0.62);
  transition: background 0.3s var(--about-ease), color 0.3s var(--about-ease), border-color 0.3s var(--about-ease);
}
.about-ghost-btn:hover {
  background: rgba(201, 162, 75, 0.12);
  border-color: var(--gold);
  color: var(--gold);
}
@media (min-width: 768px) {
  .about-forward {
    padding: 6rem 0;
  }
  .about-forward-actions {
    gap: 1.25rem;
  }
}

/* ========== 通用响应式细节 ========== */
@media (max-width: 500px) {
  .about-fact-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .about-masthead-visual .img-frame {
    box-shadow: 8px 10px 0 rgba(201, 162, 75, 0.2);
  }
  .honor-badge {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1), 5px 6px 0 var(--terra);
  }
}