/* ===== 品牌故事页 · page-about ===== */
.page-about {
  background: var(--white-soft);
  color: var(--navy);
  font-family: var(--font-body);
  overflow-x: clip;
}
.page-about .crumb-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
}
.page-about .breadcrumb {
  margin: 0;
}

/* 首屏分屏 */
.page-about .hero-split {
  background:
    linear-gradient(120deg, rgba(244,162,97,0.10) 0%, rgba(244,162,97,0) 45%),
    var(--navy);
  color: var(--white);
  padding: 3rem 1.25rem;
  position: relative;
  overflow: hidden;
}
.page-about .hero-split::after {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 12rem;
  height: 12rem;
  border: 2px solid rgba(244,162,97,0.35);
  transform: rotate(45deg);
  pointer-events: none;
}
.page-about .hero-copy {
  position: relative;
  z-index: 1;
  min-width: 0;
}
.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}
.page-about .hero-kicker::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--red);
}
.page-about .hero-split h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 6vw, 2.75rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin: 0 0 1.25rem;
}
.page-about .hero-lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.88);
  max-width: 36rem;
  margin: 0 0 1.75rem;
}
.page-about .hero-lead a {
  color: var(--gold);
  text-underline-offset: 4px;
}
.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.page-about .hero-actions .btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}
.page-about .hero-actions .btn-primary {
  background: var(--red);
  border-color: var(--red);
}
.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .hero-stat {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  min-width: 8rem;
}
.page-about .hero-stat .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.2;
}
.page-about .hero-stat .stat-label {
  display: block;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.72);
  margin-top: 0.25rem;
}
.page-about .hero-visual {
  margin: 2rem 0 0;
  min-width: 0;
}
.page-about .hero-visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  border: 3px solid var(--gold);
  box-shadow: 10px 10px 0 rgba(244,162,97,0.25);
  object-fit: cover;
}
.page-about .hero-visual figcaption {
  margin-top: 0.75rem;
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
}

/* 侧边导览轨道 */
.page-about .about-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.25rem 1.5rem;
}
.page-about .page-toc {
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-lg);
  border: 2px solid var(--navy-light);
  padding: 1.25rem;
  margin: 1.5rem 0;
}
.page-about .toc-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.85rem;
}
.page-about .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-about .toc-item a {
  display: inline-block;
  background: var(--navy-light);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--white);
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
  text-decoration: none;
  transition:
    background 0.2s var(--ease-standard),
    border-color 0.2s var(--ease-standard),
    color 0.2s var(--ease-standard);
}
.page-about .toc-item a:hover,
.page-about .toc-item a:focus-visible {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
}
.page-about .toc-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.72);
}
.page-about .toc-note-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(127,157,107,0.7);
  animation: aboutPulse 2.4s ease-out infinite;
}
@keyframes aboutPulse {
  0% { box-shadow: 0 0 0 0 rgba(127,157,107,0.6); }
  70% { box-shadow: 0 0 0 0.5rem rgba(127,157,107,0); }
  100% { box-shadow: 0 0 0 0 rgba(127,157,107,0); }
}
@media (prefers-reduced-motion: reduce) {
  .page-about .toc-note-dot {
    animation: none;
  }
}

/* 内容流 */
.page-about .about-content {
  padding: 0 0 2rem;
}
.page-about .about-section {
  padding-block: 3rem;
  border-bottom: 1px solid var(--gray-border);
}
.page-about .about-section:last-child {
  border-bottom: 0;
}
.page-about .section-index {
  font-family: var(--font-mono);
  font-size: 4rem;
  line-height: 1;
  font-weight: 700;
  color: var(--navy);
  -webkit-text-stroke: 2px var(--red);
  margin: 0 0 0.35rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
  color: var(--navy);
  position: relative;
  padding-left: 0.75rem;
}
.page-about .section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.2em;
  width: 4px;
  background: var(--red);
}
.page-about .section-desc {
  color: var(--gray);
  line-height: 1.7;
  margin: 0 0 1.5rem;
  max-width: 42rem;
}

/* 缘起 */
.page-about .origin-section {
  background: radial-gradient(circle at 85% 20%, rgba(244,162,97,0.18), transparent 40%);
}
.page-about .origin-grid {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}
.page-about .origin-text p {
  line-height: 1.8;
  color: var(--navy-light);
  margin: 0 0 1rem;
}
.page-about .origin-text-alt {
  padding: 1.25rem;
  background: var(--white);
  border: 2px solid var(--navy);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.page-about .diamond-decor {
  display: block;
  width: 140px;
  max-width: 100%;
  margin: 0 auto;
}

/* 里程碑 */
.page-about .milestone-wrap {
  display: grid;
  gap: 1.5rem;
}
.page-about .timeline {
  position: relative;
  border-left: 3px solid var(--gold);
  margin: 0.25rem 0 0 0.75rem;
  padding-left: 1.5rem;
}
.page-about .milestone-item {
  position: relative;
  background: var(--white);
  border: 2px solid var(--navy);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin-bottom: 1.25rem;
  transition:
    box-shadow 0.25s var(--ease-standard),
    transform 0.25s var(--ease-standard);
}
.page-about .milestone-item[open] {
  box-shadow: var(--shadow-float);
}
.page-about .milestone-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  list-style: none;
  padding: 0.9rem;
}
.page-about .milestone-summary::-webkit-details-marker {
  display: none;
}
.page-about .milestone-summary::before {
  content: "";
  position: absolute;
  left: -1.65rem;
  top: 1.1rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: var(--red);
  border: 3px solid var(--gold);
}
.page-about .milestone-year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--white);
  background: var(--navy);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
}
.page-about .milestone-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--navy);
  flex: 1 1 auto;
}
.page-about .milestone-arrow {
  flex: 0 0 auto;
  width: 1.1rem;
  height: 1.1rem;
  position: relative;
}
.page-about .milestone-arrow::before,
.page-about .milestone-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--red);
  transform: translate(-50%, -50%);
  transition: transform 0.25s var(--ease-standard);
}
.page-about .milestone-arrow::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.page-about .milestone-item[open] .milestone-arrow::after {
  transform: translate(-50%, -50%) rotate(0deg);
}
.page-about .milestone-detail {
  border-top: 1px dashed var(--gray-border);
  padding: 0.9rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray);
}
.page-about .milestone-detail p {
  margin: 0;
}
.page-about .milestone-figure {
  margin: 0;
  align-self: start;
}
.page-about .milestone-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  border: 2px solid var(--navy);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}
.page-about .milestone-figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.85rem;
  color: var(--gray);
}

/* 理念 */
.page-about .philosophy-section {
  background:
    repeating-linear-gradient(135deg, rgba(10,31,68,0.02) 0, rgba(10,31,68,0.02) 2px, rgba(244,162,97,0.06) 2px, rgba(244,162,97,0.06) 16px),
    var(--white-soft);
}
.page-about .philosophy-grid {
  display: grid;
  gap: 1rem;
}
.page-about .philosophy-card {
  background: var(--white);
  border: 2px solid var(--navy);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  transition: transform 0.25s var(--ease-standard);
}
.page-about .philosophy-card:hover {
  transform: translateY(-4px);
}
.page-about .philosophy-card-title {
  font-family: var(--font-heading);
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--red);
}
.page-about .philosophy-card p {
  margin: 0;
  color: var(--navy-light);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* 团队 */
.page-about .team-layout {
  display: grid;
  gap: 1.5rem;
}
.page-about .team-figure {
  margin: 0;
}
.page-about .team-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  border: 2px solid var(--navy);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}
.page-about .team-figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.85rem;
  color: var(--gray);
}
.page-about .team-tabs {
  min-width: 0;
}
.page-about .tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.page-about .tab-btn {
  appearance: none;
  border: 2px solid var(--navy);
  border-radius: var(--radius-pill);
  background: var(--white);
  color: var(--navy);
  font-family: var(--font-body);
  font-size: 0.875rem;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  transition:
    background 0.2s var(--ease-standard),
    color 0.2s var(--ease-standard),
    border-color 0.2s var(--ease-standard);
}
.page-about .tab-btn[aria-selected="true"] {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.page-about .tab-btn:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}
.page-about .tab-panel {
  background: var(--white);
  border: 2px solid var(--navy);
  border-left-width: 8px;
  border-left-color: var(--red);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.page-about .team-panel-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--gold);
  margin: 0 0 0.5rem;
  letter-spacing: 0.06em;
}
.page-about .tab-panel p {
  margin: 0 0 0.75rem;
  line-height: 1.7;
  color: var(--navy-light);
}
.page-about .tab-panel ul {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.4rem;
  color: var(--navy-light);
  font-size: 0.925rem;
}

/* 荣誉 */
.page-about .honors-section {
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-lg);
  margin-top: 1rem;
  padding: 3rem 1.25rem;
  border: 2px solid var(--navy);
}
.page-about .honors-section .section-index {
  -webkit-text-stroke: 2px var(--gold);
}
.page-about .honors-section .section-title {
  color: var(--white);
}
.page-about .honors-section .section-desc {
  color: rgba(255,255,255,0.72);
}
.page-about .honors-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-about .honor-item {
  display: flex;
  gap: 1rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}
.page-about .honor-icon {
  color: var(--gold);
  font-size: 1.15rem;
  line-height: 1.4;
}
.page-about .honor-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--white);
  margin: 0 0 0.4rem;
}
.page-about .honor-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.76);
}

/* CTA */
.page-about .contact-cta {
  border-bottom: 0;
  text-align: center;
}
.page-about .contact-cta .section-desc {
  margin-inline: auto;
}
.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.5rem;
}
.page-about .contact-cta .btn-gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
}

/* 全局焦点强化 */
.page-about a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-about .hero-split h1 {
    font-size: 2.5rem;
  }
  .page-about .origin-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .page-about .philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .honors-list {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .honor-item {
    flex-direction: column;
  }
}

@media (min-width: 900px) {
  .page-about .hero-split {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
    align-items: center;
    padding: 5rem max(1.25rem, calc((100vw - var(--container-width)) / 2));
  }
  .page-about .hero-visual {
    margin: 0;
  }
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
    padding: 2.5rem max(1.25rem, calc((100vw - var(--container-width)) / 2)) 3.5rem;
  }
  .page-about .page-toc {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    margin: 0;
  }
  .page-about .toc-list {
    flex-direction: column;
    align-items: stretch;
  }
  .page-about .toc-item a {
    display: block;
    border-radius: var(--radius-sm);
  }
  .page-about .about-content {
    padding: 0;
  }
  .page-about .about-section {
    padding-block: 4rem;
  }
  .page-about .milestone-wrap {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }
  .page-about .milestone-item:nth-child(even) {
    margin-left: 1.75rem;
  }
  .page-about .milestone-figure {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
  }
  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 2rem;
    align-items: start;
  }
  .page-about .honors-section {
    padding: 4rem 2rem;
  }
}