.page-about {
  --color-primary-dark: #0d3b2e;
  --color-accent-gold: #c9a84c;
  --color-accent-orange: #e67e22;
  --color-surface-light: #f5f2e8;
  --color-text-primary: #ffffff;
  --color-text-secondary: #b8b5a8;
  --color-glass-overlay: rgba(13, 59, 46, 0.7);
  --color-divider: #c9a84c;
  --font-heading: Impact, 'Arial Black', sans-serif;
  --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-max: 1280px;
  --header-height: 64px;
  --transition-default: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --radius-sm: 4px;
  --radius-md: 8px;
  --page-gutter: 1.25rem;
  --section-spacing: 3.5rem;
  --hero-clip-offset: 15%;
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.75rem var(--page-gutter);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.5rem;
}
.page-about .breadcrumb a {
  color: var(--color-accent-gold);
  text-decoration: none;
  transition: opacity var(--transition-default);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  opacity: 0.8;
  text-decoration: underline;
}
.page-about .breadcrumb .sep {
  color: var(--color-text-secondary);
  font-weight: 700;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* --- Hero 首屏 --- */
.page-about .hero-section {
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background-color: var(--color-primary-dark);
  margin-bottom: var(--section-spacing);
}
.page-about .hero-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.page-about .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 59, 46, 0.85) 40%, rgba(13, 59, 46, 0.4) 80%);
  z-index: 1;
}
.page-about .hero-accent {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 55%;
  height: 45%;
  background: var(--color-accent-gold);
  clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 0% 100%);
  z-index: 2;
  opacity: 0.15;
  pointer-events: none;
}
.page-about .hero-content {
  position: relative;
  z-index: 3;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 4rem var(--page-gutter) 3rem;
}
.page-about .hero-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.5rem;
  line-height: 1;
  color: var(--color-accent-gold);
  margin-bottom: 0.25rem;
  letter-spacing: 0.05em;
}
.page-about .hero-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 1.05;
  color: var(--color-text-primary);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-about .hero-tagline {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  margin: 0 0 0.75rem;
  letter-spacing: 0.06em;
}
.page-about .hero-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0;
}

/* --- 通用编号章节 --- */
.page-about .section-numbered {
  max-width: var(--container-max);
  margin: 0 auto var(--section-spacing);
  padding: 0 var(--page-gutter);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .section-label {
  flex: 0 0 auto;
}
.page-about .section-label .num {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.2rem;
  line-height: 1;
  color: var(--color-accent-gold);
  margin-bottom: 0.15rem;
  letter-spacing: 0.03em;
}
.page-about .section-label .title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--color-primary-dark);
  margin: 0 0 0.3rem;
  text-transform: uppercase;
}
.page-about .section-label .label-annotation {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin: 0;
  font-weight: 400;
  letter-spacing: 0.04em;
}
.page-about .section-body {
  flex: 1 1 100%;
}

/* --- 01 我们的故事 - 时间线 --- */
.page-about .timeline {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-left: 3px solid var(--color-accent-gold);
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}
.page-about .timeline-node {
  background: var(--color-surface-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: box-shadow var(--transition-default);
}
.page-about .timeline-node:hover {
  box-shadow: var(--shadow-card);
}
.page-about .timeline-node[open] {
  box-shadow: var(--shadow-card);
}
.page-about .node-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary-dark);
  transition: background var(--transition-default);
}
.page-about .node-summary::-webkit-details-marker,
.page-about .node-summary::marker {
  display: none;
  content: "";
}
.page-about .node-summary:hover,
.page-about .node-summary:focus-visible {
  background: rgba(201, 168, 76, 0.08);
}
.page-about .node-marker {
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  border: 2px solid var(--color-primary-dark);
  display: inline-block;
  transition: transform var(--transition-default);
}
.page-about .timeline-node[open] .node-marker {
  transform: scale(1.25);
  background: var(--color-accent-orange);
}
.page-about .node-label {
  flex: 1;
}
.page-about .node-detail {
  padding: 0 1.25rem 1rem 2rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.65;
  color: #2c2c2c;
}
.page-about .node-detail p {
  margin: 0;
}

/* --- 02 服务理念 --- */
.page-about .philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.page-about .philosophy-card {
  padding: 1.5rem;
  background: var(--color-glass-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(201, 168, 76, 0.2);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}
.page-about .philosophy-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.page-about .philosophy-card .card-icon {
  margin-bottom: 0.75rem;
}
.page-about .philosophy-card .card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-accent-gold);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-about .philosophy-card .card-text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}
.page-about .league-logos {
  text-align: center;
  margin-top: 0.5rem;
}
.page-about .logos-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
  margin: 0 auto;
}
.page-about .logos-caption {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin: 0.5rem 0 0;
  letter-spacing: 0.05em;
}

/* --- 03 技术实力 --- */
.page-about .tech-showcase {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .tech-visual {
  flex: 0 0 auto;
}
.page-about .tech-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
  box-shadow: var(--shadow-card);
}
.page-about .tech-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.page-about .tech-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: var(--color-surface-light);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-accent-gold);
  transition: box-shadow var(--transition-default);
}
.page-about .tech-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.page-about .tech-num {
  flex: 0 0 2rem;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent-gold);
  line-height: 1;
  margin-top: 0.1rem;
}
.page-about .tech-item-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin: 0 0 0.3rem;
}
.page-about .tech-item-text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #444;
  margin: 0;
}

/* --- 04 用户群体 --- */
.page-about .audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .audience-card {
  padding: 1.5rem;
  background: var(--color-surface-light);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid rgba(201, 168, 76, 0.15);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}
.page-about .audience-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.page-about .audience-card .card-visual {
  margin-bottom: 0.75rem;
}
.page-about .audience-card .card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-primary-dark);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-about .audience-card .card-text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #444;
  margin: 0;
}

/* --- 探索更多 --- */
.page-about .explore-section {
  max-width: var(--container-max);
  margin: 0 auto var(--section-spacing);
  padding: 0 var(--page-gutter);
}
.page-about .explore-inner {
  background: var(--color-primary-dark);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-about .explore-inner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: var(--color-accent-gold);
  clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 100%);
  opacity: 0.06;
  pointer-events: none;
}
.page-about .explore-heading {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-text-primary);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-about .explore-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: 0 0 1.5rem;
}
.page-about .explore-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}
.page-about .btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-default);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
}
.page-about .btn-outline {
  color: var(--color-accent-gold);
  border-color: var(--color-accent-gold);
  background: transparent;
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--color-accent-gold);
  color: var(--color-primary-dark);
}
.page-about .btn-primary {
  color: var(--color-text-primary);
  background: var(--color-accent-orange);
  border-color: var(--color-accent-orange);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #d4741e;
  border-color: #d4741e;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(230, 126, 34, 0.35);
}

/* --- 桌面端 768px+ --- */
@media (min-width: 768px) {
  .page-about {
    --section-spacing: 5rem;
    --page-gutter: 2rem;
  }
  .page-about .hero-section {
    min-height: 75vh;
  }
  .page-about .hero-number {
    font-size: 5rem;
  }
  .page-about .hero-title {
    font-size: 4rem;
  }
  .page-about .hero-tagline {
    font-size: 1.5rem;
  }
  .page-about .hero-desc {
    font-size: 1.05rem;
    max-width: 640px;
  }
  .page-about .hero-accent {
    width: 40%;
    height: 50%;
    opacity: 0.12;
    clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
  }
  .page-about .section-numbered {
    flex-direction: row;
    gap: 2.5rem;
  }
  .page-about .section-label {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + 1rem);
    align-self: flex-start;
  }
  .page-about .section-label .num {
    font-size: 4rem;
  }
  .page-about .section-label .title {
    font-size: 2rem;
  }
  .page-about .section-body {
    flex: 1 1 0;
    min-width: 0;
  }
  .page-about .philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .page-about .tech-showcase {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
  .page-about .tech-visual {
    flex: 0 0 45%;
  }
  .page-about .tech-details {
    flex: 1;
  }
  .page-about .audience-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .page-about .explore-inner {
    padding: 3.5rem 2.5rem;
  }
  .page-about .explore-heading {
    font-size: 2.2rem;
  }
  .page-about .explore-links {
    gap: 1rem;
  }
  .page-about .btn {
    padding: 0.8rem 2rem;
    font-size: 0.95rem;
  }
}

/* --- 桌面端 1024px+ --- */
@media (min-width: 1024px) {
  .page-about .section-label {
    width: 280px;
  }
  .page-about .section-label .num {
    font-size: 4.8rem;
  }
  .page-about .section-label .title {
    font-size: 2.4rem;
  }
  .page-about .hero-number {
    font-size: 6rem;
  }
  .page-about .hero-title {
    font-size: 5rem;
  }
  .page-about .hero-accent {
    width: 35%;
    height: 55%;
    opacity: 0.1;
  }
  .page-about .philosophy-card {
    padding: 2rem;
  }
  .page-about .timeline {
    padding-left: 2rem;
  }
}
</style>

.page-about {
  --color-primary-dark: #0d3b2e;
  --color-accent-gold: #c9a84c;
  --color-accent-orange: #e67e22;
  --color-surface-light: #f5f2e8;
  --color-text-primary: #ffffff;
  --color-text-secondary: #b8b5a8;
  --color-glass-overlay: rgba(13, 59, 46, 0.7);
  --color-divider: #c9a84c;
  --font-heading: Impact, 'Arial Black', sans-serif;
  --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-max: 1280px;
  --header-height: 64px;
  --transition-default: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --radius-sm: 4px;
  --radius-md: 8px;
  --page-gutter: 1.25rem;
  --section-spacing: 3.5rem;
  --hero-clip-offset: 15%;
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.75rem var(--page-gutter);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.5rem;
}
.page-about .breadcrumb a {
  color: var(--color-accent-gold);
  text-decoration: none;
  transition: opacity var(--transition-default);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  opacity: 0.8;
  text-decoration: underline;
}
.page-about .breadcrumb .sep {
  color: var(--color-text-secondary);
  font-weight: 700;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* --- Hero 首屏 --- */
.page-about .hero-section {
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background-color: var(--color-primary-dark);
  margin-bottom: var(--section-spacing);
}
.page-about .hero-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.page-about .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 59, 46, 0.85) 40%, rgba(13, 59, 46, 0.4) 80%);
  z-index: 1;
}
.page-about .hero-accent {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 55%;
  height: 45%;
  background: var(--color-accent-gold);
  clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 0% 100%);
  z-index: 2;
  opacity: 0.15;
  pointer-events: none;
}
.page-about .hero-content {
  position: relative;
  z-index: 3;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 4rem var(--page-gutter) 3rem;
}
.page-about .hero-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.5rem;
  line-height: 1;
  color: var(--color-accent-gold);
  margin-bottom: 0.25rem;
  letter-spacing: 0.05em;
}
.page-about .hero-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 1.05;
  color: var(--color-text-primary);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-about .hero-tagline {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  margin: 0 0 0.75rem;
  letter-spacing: 0.06em;
}
.page-about .hero-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0;
}

/* --- 通用编号章节 --- */
.page-about .section-numbered {
  max-width: var(--container-max);
  margin: 0 auto var(--section-spacing);
  padding: 0 var(--page-gutter);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .section-label {
  flex: 0 0 auto;
}
.page-about .section-label .num {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.2rem;
  line-height: 1;
  color: var(--color-accent-gold);
  margin-bottom: 0.15rem;
  letter-spacing: 0.03em;
}
.page-about .section-label .title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--color-primary-dark);
  margin: 0 0 0.3rem;
  text-transform: uppercase;
}
.page-about .section-label .label-annotation {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin: 0;
  font-weight: 400;
  letter-spacing: 0.04em;
}
.page-about .section-body {
  flex: 1 1 100%;
}

/* --- 01 我们的故事 - 时间线 --- */
.page-about .timeline {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-left: 3px solid var(--color-accent-gold);
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}
.page-about .timeline-node {
  background: var(--color-surface-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: box-shadow var(--transition-default);
}
.page-about .timeline-node:hover {
  box-shadow: var(--shadow-card);
}
.page-about .timeline-node[open] {
  box-shadow: var(--shadow-card);
}
.page-about .node-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary-dark);
  transition: background var(--transition-default);
}
.page-about .node-summary::-webkit-details-marker,
.page-about .node-summary::marker {
  display: none;
  content: "";
}
.page-about .node-summary:hover,
.page-about .node-summary:focus-visible {
  background: rgba(201, 168, 76, 0.08);
}
.page-about .node-marker {
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  border: 2px solid var(--color-primary-dark);
  display: inline-block;
  transition: transform var(--transition-default);
}
.page-about .timeline-node[open] .node-marker {
  transform: scale(1.25);
  background: var(--color-accent-orange);
}
.page-about .node-label {
  flex: 1;
}
.page-about .node-detail {
  padding: 0 1.25rem 1rem 2rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.65;
  color: #2c2c2c;
}
.page-about .node-detail p {
  margin: 0;
}

/* --- 02 服务理念 --- */
.page-about .philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.page-about .philosophy-card {
  padding: 1.5rem;
  background: var(--color-glass-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(201, 168, 76, 0.2);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}
.page-about .philosophy-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.page-about .philosophy-card .card-icon {
  margin-bottom: 0.75rem;
}
.page-about .philosophy-card .card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-accent-gold);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-about .philosophy-card .card-text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}
.page-about .league-logos {
  text-align: center;
  margin-top: 0.5rem;
}
.page-about .logos-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
  margin: 0 auto;
}
.page-about .logos-caption {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin: 0.5rem 0 0;
  letter-spacing: 0.05em;
}

/* --- 03 技术实力 --- */
.page-about .tech-showcase {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .tech-visual {
  flex: 0 0 auto;
}
.page-about .tech-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
  box-shadow: var(--shadow-card);
}
.page-about .tech-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.page-about .tech-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: var(--color-surface-light);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-accent-gold);
  transition: box-shadow var(--transition-default);
}
.page-about .tech-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.page-about .tech-num {
  flex: 0 0 2rem;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent-gold);
  line-height: 1;
  margin-top: 0.1rem;
}
.page-about .tech-item-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin: 0 0 0.3rem;
}
.page-about .tech-item-text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #444;
  margin: 0;
}

/* --- 04 用户群体 --- */
.page-about .audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .audience-card {
  padding: 1.5rem;
  background: var(--color-surface-light);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid rgba(201, 168, 76, 0.15);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}
.page-about .audience-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.page-about .audience-card .card-visual {
  margin-bottom: 0.75rem;
}
.page-about .audience-card .card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-primary-dark);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-about .audience-card .card-text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #444;
  margin: 0;
}

/* --- 探索更多 --- */
.page-about .explore-section {
  max-width: var(--container-max);
  margin: 0 auto var(--section-spacing);
  padding: 0 var(--page-gutter);
}
.page-about .explore-inner {
  background: var(--color-primary-dark);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-about .explore-inner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: var(--color-accent-gold);
  clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 100%);
  opacity: 0.06;
  pointer-events: none;
}
.page-about .explore-heading {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-text-primary);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-about .explore-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: 0 0 1.5rem;
}
.page-about .explore-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}
.page-about .btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-default);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
}
.page-about .btn-outline {
  color: var(--color-accent-gold);
  border-color: var(--color-accent-gold);
  background: transparent;
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--color-accent-gold);
  color: var(--color-primary-dark);
}
.page-about .btn-primary {
  color: var(--color-text-primary);
  background: var(--color-accent-orange);
  border-color: var(--color-accent-orange);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #d4741e;
  border-color: #d4741e;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(230, 126, 34, 0.35);
}

/* --- 桌面端 768px+ --- */
@media (min-width: 768px) {
  .page-about {
    --section-spacing: 5rem;
    --page-gutter: 2rem;
  }
  .page-about .hero-section {
    min-height: 75vh;
  }
  .page-about .hero-number {
    font-size: 5rem;
  }
  .page-about .hero-title {
    font-size: 4rem;
  }
  .page-about .hero-tagline {
    font-size: 1.5rem;
  }
  .page-about .hero-desc {
    font-size: 1.05rem;
    max-width: 640px;
  }
  .page-about .hero-accent {
    width: 40%;
    height: 50%;
    opacity: 0.12;
    clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
  }
  .page-about .section-numbered {
    flex-direction: row;
    gap: 2.5rem;
  }
  .page-about .section-label {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + 1rem);
    align-self: flex-start;
  }
  .page-about .section-label .num {
    font-size: 4rem;
  }
  .page-about .section-label .title {
    font-size: 2rem;
  }
  .page-about .section-body {
    flex: 1 1 0;
    min-width: 0;
  }
  .page-about .philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .page-about .tech-showcase {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
  .page-about .tech-visual {
    flex: 0 0 45%;
  }
  .page-about .tech-details {
    flex: 1;
  }
  .page-about .audience-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .page-about .explore-inner {
    padding: 3.5rem 2.5rem;
  }
  .page-about .explore-heading {
    font-size: 2.2rem;
  }
  .page-about .explore-links {
    gap: 1rem;
  }
  .page-about .btn {
    padding: 0.8rem 2rem;
    font-size: 0.95rem;
  }
}

/* --- 桌面端 1024px+ --- */
@media (min-width: 1024px) {
  .page-about .section-label {
    width: 280px;
  }
  .page-about .section-label .num {
    font-size: 4.8rem;
  }
  .page-about .section-label .title {
    font-size: 2.4rem;
  }
  .page-about .hero-number {
    font-size: 6rem;
  }
  .page-about .hero-title {
    font-size: 5rem;
  }
  .page-about .hero-accent {
    width: 35%;
    height: 55%;
    opacity: 0.1;
  }
  .page-about .philosophy-card {
    padding: 2rem;
  }
  .page-about .timeline {
    padding-left: 2rem;
  }
}