/* ===== page-about 品牌故事专属样式 ===== */
.page-about {
  --color-red: #C41030;
  --color-blue-dark: #1A2A4A;
  --color-gold: #F1C40F;
  --color-gray-rock: #8A9BA8;
  --color-cream: #F4F1EA;
  --color-green: #2E8B57;
  --color-terracotta: #D35400;
  --color-blue-deep: #0B1A33;
  --color-white: #FFFFFF;
  --color-black: #111111;
  --font-heading: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', sans-serif;
  --font-body: 'Georgia', 'Songti SC', 'Times New Roman', serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 50px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.25);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.35);
  --max-width: 1200px;

  background-color: var(--color-cream);
  color: var(--color-black);
  font-family: var(--font-body);
  line-height: 1.6;
  padding: 2rem 1rem 4rem;
}

/* 容器与栅格 */
.page-about .about-hero-inner,
.page-about .about-origin-inner,
.page-about .about-timeline-inner,
.page-about .about-philosophy-inner,
.page-about .about-atmosphere-inner,
.page-about .about-trust-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* 面包屑 */
.page-about .about-breadcrumb {
  margin-top: var(--space-xl);
  padding: var(--space-md) 0 0;
  font-size: 0.85rem;
  color: var(--color-gray-rock);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}
.page-about .about-breadcrumb .breadcrumb-link {
  color: var(--color-blue-dark);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .about-breadcrumb .breadcrumb-link:hover,
.page-about .about-breadcrumb .breadcrumb-link:focus-visible {
  color: var(--color-red);
  text-decoration: underline;
}
.page-about .about-breadcrumb .breadcrumb-link[aria-current="page"] {
  color: var(--color-gray-rock);
  text-decoration: none;
  cursor: default;
}
.page-about .about-breadcrumb .breadcrumb-sep {
  color: var(--color-gray-rock);
  margin: 0 0.15rem;
}

/* 通用section标签 */
.page-about .about-section-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-red);
  margin: 0 0 var(--space-md);
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-sm);
}

/* ===== 框景首屏 ===== */
.page-about .about-hero {
  margin-bottom: var(--space-2xl);
}
.page-about .about-hero-frame {
  position: relative;
  background-color: var(--color-blue-deep);
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(241, 196, 15, 0.15);
  /* 纸张叠层效果 */
  background-image: linear-gradient(135deg, rgba(241,196,15,0.03) 0%, transparent 60%);
  overflow: hidden;
}
.page-about .about-hero-frame-border {
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(241, 196, 15, 0.25);
  border-radius: calc(var(--radius-md) - 4px);
  pointer-events: none;
}
.page-about .about-hero-content {
  position: relative;
  z-index: 2;
}
.page-about .about-hero-kicker {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-gold);
  display: inline-block;
  border: 1px solid var(--color-gold);
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
}
.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-white);
  margin: 0 0 var(--space-sm);
}
.page-about .about-hero-title-accent {
  color: var(--color-red);
}
.page-about .about-hero-sub {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  margin: var(--space-md) 0 var(--space-lg);
  font-family: var(--font-body);
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}
.page-about .about-hero-meta-item {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gold);
  position: relative;
}
.page-about .about-hero-meta-item::before {
  content: "◆";
  color: var(--color-red);
  margin-right: 0.4rem;
  font-size: 0.5rem;
  vertical-align: middle;
}
/* 刻度量尺 */
.page-about .about-hero-scale {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(241, 196, 15, 0.25);
  position: relative;
  z-index: 2;
}
.page-about .about-hero-scale::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--color-gold) 0px, var(--color-gold) 2px, transparent 2px, transparent 8px);
  opacity: 0.4;
}
.page-about .about-hero-scale-mark {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.05em;
  transition: color 0.2s;
  cursor: default;
}
.page-about .about-hero-scale-mark:hover {
  color: var(--color-gold);
}

/* ===== 我们的起点 ===== */
.page-about .about-origin {
  margin-bottom: var(--space-2xl);
}
.page-about .about-origin-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.page-about .about-origin-text {
  flex: 1;
}
.page-about .about-origin-paragraph {
  font-size: 1rem;
  margin: 0 0 var(--space-md);
  color: var(--color-black);
  max-width: 660px;
}
.page-about .about-origin-visual {
  flex: 0 0 auto;
  position: relative;
}
.page-about .about-origin-img {
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: block;
  object-fit: cover;
  border: 1px solid rgba(196, 16, 48, 0.15);
}
.page-about .about-origin-img-caption {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  color: var(--color-gray-rock);
  margin-top: var(--space-sm);
  border-left: 2px solid var(--color-gold);
  padding-left: var(--space-sm);
  letter-spacing: 0.05em;
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  margin-bottom: var(--space-2xl);
}
.page-about .about-timeline-intro {
  font-size: 0.95rem;
  color: var(--color-gray-rock);
  margin-bottom: var(--space-lg);
  max-width: 540px;
}
.page-about .about-timeline-track {
  position: relative;
  padding-left: var(--space-lg);
}
.page-about .about-timeline-track::before {
  content: "";
  position: absolute;
  left: 1.2rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold) 0%, var(--color-red) 50%, var(--color-blue-dark) 100%);
  opacity: 0.5;
}
.page-about .about-timeline-node {
  position: relative;
  margin-bottom: var(--space-xl);
  padding-left: var(--space-lg);
  cursor: default;
}
.page-about .about-timeline-node:last-child {
  margin-bottom: 0;
}
.page-about .about-timeline-node-marker {
  position: absolute;
  left: calc(-1 * var(--space-lg) - 0.6rem);
  top: 0.2rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.page-about .about-timeline-node-year {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-blue-dark);
  writing-mode: vertical-lr;
  text-orientation: mixed;
  letter-spacing: 0.1em;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.page-about .about-timeline-node:hover .about-timeline-node-year,
.page-about .about-timeline-node:focus-within .about-timeline-node-year {
  opacity: 1;
  color: var(--color-red);
}
.page-about .about-timeline-node-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-gold);
  border: 2px solid var(--color-cream);
  box-shadow: 0 0 0 2px var(--color-blue-dark);
  flex-shrink: 0;
  transition: transform 0.2s, box-shadow 0.2s;
}
.page-about .about-timeline-node:hover .about-timeline-node-dot,
.page-about .about-timeline-node:focus-within .about-timeline-node-dot {
  transform: scale(1.25);
  box-shadow: 0 0 0 2px var(--color-red), 0 0 12px rgba(196, 16, 48, 0.35);
}
.page-about .about-timeline-node-content {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--color-gold);
  transition: box-shadow 0.2s, border-color 0.2s;
}
.page-about .about-timeline-node:hover .about-timeline-node-content,
.page-about .about-timeline-node:focus-within .about-timeline-node-content {
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-red);
}
.page-about .about-timeline-node-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-blue-dark);
  margin: 0 0 var(--space-xs);
}
.page-about .about-timeline-node-desc {
  font-size: 0.9rem;
  color: var(--color-black);
  margin: 0;
  line-height: 1.5;
}
/* 悬停详情浮窗（CSS 驱动展示 data-hover-detail） */
.page-about .about-timeline-hover-detail {
  display: none;
}
/* 利用 CSS 显示悬停详情 —— 渐进增强方案：在节点上通过伪元素展示 */
.page-about .about-timeline-node[data-hover-detail]:hover::after,
.page-about .about-timeline-node[data-hover-detail]:focus-within::after {
  content: attr(data-hover-detail);
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  background-color: var(--color-blue-deep);
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  max-width: 320px;
  box-shadow: var(--shadow-md);
  z-index: 10;
  border: 1px solid var(--color-gold);
  line-height: 1.4;
  pointer-events: none;
  white-space: normal;
}
@media (max-width: 599px) {
  .page-about .about-timeline-node[data-hover-detail]:hover::after,
  .page-about .about-timeline-node[data-hover-detail]:focus-within::after {
    max-width: 220px;
    font-size: 0.75rem;
    left: -1rem;
  }
}

/* ===== 服务理念 ===== */
.page-about .about-philosophy {
  margin-bottom: var(--space-2xl);
}
.page-about .about-philosophy-intro {
  font-size: 0.95rem;
  color: var(--color-gray-rock);
  margin-bottom: var(--space-lg);
  max-width: 540px;
}
.page-about .about-philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
/* 卡片翻转 */
.page-about .about-philosophy-card {
  position: relative;
  min-height: 280px;
  perspective: 1000px;
  cursor: pointer;
}
.page-about .about-philosophy-card-front,
.page-about .about-philosophy-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s ease, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-about .about-philosophy-card-front {
  background-color: var(--color-white);
  border: 1px solid rgba(196, 16, 48, 0.1);
  z-index: 2;
}
.page-about .about-philosophy-card-back {
  background-color: var(--color-blue-dark);
  color: var(--color-white);
  transform: rotateY(180deg);
  border: 1px solid var(--color-gold);
  z-index: 1;
}
.page-about .about-philosophy-card:hover .about-philosophy-card-front,
.page-about .about-philosophy-card:focus-within .about-philosophy-card-front {
  transform: rotateY(-180deg);
  box-shadow: var(--shadow-md);
}
.page-about .about-philosophy-card:hover .about-philosophy-card-back,
.page-about .about-philosophy-card:focus-within .about-philosophy-card-back {
  transform: rotateY(0deg);
  box-shadow: var(--shadow-md);
}
.page-about .about-philosophy-card-icon {
  margin-bottom: var(--space-md);
}
.page-about .about-philosophy-card-icon-img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
}
.page-about .about-philosophy-card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-blue-dark);
  margin: 0 0 var(--space-sm);
}
.page-about .about-philosophy-card-desc {
  font-size: 0.9rem;
  color: var(--color-black);
  margin: 0 0 var(--space-md);
  line-height: 1.5;
  flex: 1;
}
.page-about .about-philosophy-card-tag {
  font-family: var(--font-heading);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-red);
  border: 1px solid var(--color-red);
  padding: 0.15rem 0.7rem;
  border-radius: var(--radius-lg);
  align-self: flex-start;
}
.page-about .about-philosophy-card-back-text {
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

/* ===== 赛场氛围区块 ===== */
.page-about .about-atmosphere {
  margin-bottom: var(--space-2xl);
}
.page-about .about-atmosphere-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: center;
  background-color: var(--color-blue-deep);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(241, 196, 15, 0.2);
}
.page-about .about-atmosphere-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}
.page-about .about-atmosphere-text {
  text-align: center;
}
.page-about .about-atmosphere-quote {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-gold);
  margin: 0 0 var(--space-sm);
  line-height: 1.4;
}
.page-about .about-atmosphere-source {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
  letter-spacing: 0.05em;
}

/* ===== 信任与行动号召 ===== */
.page-about .about-trust {
  margin-bottom: var(--space-lg);
}
.page-about .about-trust-inner {
  background-color: var(--color-cream);
  border: 1px solid var(--color-gray-rock);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.page-about .about-trust-text {
  font-size: 0.85rem;
  color: var(--color-blue-dark);
  margin: 0 0 var(--space-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}
.page-about .about-trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}
.page-about .btn {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.25s;
  border: 2px solid transparent;
}
.page-about .btn-primary {
  background-color: var(--color-red);
  color: var(--color-white);
  border-color: var(--color-red);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background-color: #a00d28;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(241, 196, 15, 0.3);
  transform: translateY(-2px);
}
.page-about .btn-outline {
  background-color: transparent;
  color: var(--color-blue-dark);
  border-color: var(--color-gold);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background-color: var(--color-gold);
  color: var(--color-blue-dark);
  border-color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== 响应式: 平板与桌面 ===== */
@media (min-width: 768px) {
  .page-about {
    padding: 3rem 2rem 5rem;
  }

  .page-about .about-hero-frame {
    padding: var(--space-xl) var(--space-lg);
  }
  .page-about .about-hero-title {
    font-size: 4rem;
  }
  .page-about .about-hero-sub {
    font-size: 1.1rem;
  }

  .page-about .about-origin-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl);
  }
  .page-about .about-origin-text {
    flex: 1;
  }
  .page-about .about-origin-visual {
    flex: 0 0 45%;
  }

  .page-about .about-timeline-track {
    padding-left: var(--space-xl);
  }
  .page-about .about-timeline-track::before {
    left: 1.8rem;
  }
  .page-about .about-timeline-node {
    padding-left: var(--space-xl);
  }
  .page-about .about-timeline-node-marker {
    left: calc(-1 * var(--space-xl) - 0.8rem);
  }
  .page-about .about-timeline-node-year {
    font-size: 0.85rem;
  }

  .page-about .about-philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-atmosphere-inner {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-xl);
  }
  .page-about .about-atmosphere-img {
    flex: 0 0 280px;
  }
  .page-about .about-atmosphere-text {
    text-align: left;
  }

  .page-about .about-trust-inner {
    padding: var(--space-xl) var(--space-lg);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-title {
    font-size: 5rem;
  }
  .page-about .about-hero-sub {
    font-size: 1.2rem;
  }
  .page-about .about-hero-frame {
    padding: var(--space-2xl) var(--space-xl);
  }
  .page-about .about-philosophy-grid {
    gap: var(--space-xl);
  }
}

/* ===== 窄屏保障 ===== */
@media (max-width: 479px) {
  .page-about .about-hero-title {
    font-size: 2rem;
  }
  .page-about .about-hero-meta {
    flex-direction: column;
    gap: var(--space-xs);
  }
  .page-about .about-timeline-node-content {
    padding: var(--space-md);
  }
  .page-about .about-philosophy-card {
    min-height: 240px;
  }
  .page-about .about-philosophy-card-front,
  .page-about .about-philosophy-card-back {
    padding: var(--space-md);
  }
  .page-about .about-atmosphere-inner {
    padding: var(--space-md);
  }
  .page-about .about-trust-links {
    flex-direction: column;
    align-items: center;
  }
  .page-about .btn {
    width: 100%;
    max-width: 260px;
    text-align: center;
  }
}
</<PAGE_CSS>>