/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --page-bg: var(--color-bg-deep, #1A1A2E);
  --page-text: var(--color-white, #FFFFFF);
  --page-accent: var(--color-orange, #FF6B35);
  --page-gold: var(--color-gold, #FFD700);
  --page-blue: var(--color-blue, #0B3B60);
  --page-warm: var(--color-bg-warm, #F5E6D0);
  --page-gray: var(--color-gray, #B0B0C0);
  --page-radius: var(--radius-lg, 16px);
  --page-pill: var(--radius-pill, 9999px);
  --page-font-head: var(--font-head, 'Arial Black', 'Impact', sans-serif);
  --page-font-body: var(--font-body, Georgia, 'Times New Roman', serif);
  --page-transition: var(--transition, 250ms ease);
  --page-index-width: 180px;
  --page-index-gap: 32px;

  background-color: var(--page-bg);
  color: var(--page-text);
  font-family: var(--page-font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 容器 */
.page-about .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 内部布局：索引 + 内容 ===== */
.page-about__inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 64px;
  position: relative;
}

/* ===== 侧边章节索引 ===== */
.page-about__index {
  order: -1;
  background: var(--page-warm);
  border-radius: var(--page-pill);
  padding: 16px 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.page-about__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: center;
}

.page-about__index-link {
  display: block;
  padding: 6px 18px;
  font-family: var(--page-font-head);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-header-color, #1A1A2E);
  text-decoration: none;
  border-radius: var(--page-pill);
  transition: background var(--page-transition), color var(--page-transition);
  white-space: nowrap;
}

.page-about__index-link:hover,
.page-about__index-link:focus-visible {
  background: var(--page-accent);
  color: var(--color-white, #FFFFFF);
  outline: none;
}

.page-about__index-ornament {
  display: none;
}

/* ===== 内容区 ===== */
.page-about__content {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

/* ===== 通用章节 ===== */
.page-about__section {
  position: relative;
  border-radius: var(--page-radius);
  padding: 32px 24px;
}

.page-about__heading {
  font-family: var(--page-font-head);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 12px 0;
}

.page-about__heading--xl {
  font-size: 2.8rem;
  text-transform: uppercase;
}

.page-about__heading--lg {
  font-size: 2rem;
  text-transform: uppercase;
}

.page-about__section-desc {
  font-size: 1rem;
  color: var(--page-gray);
  margin: 0 0 28px 0;
  font-family: var(--page-font-body);
  line-height: 1.6;
}

/* ===== 品牌理念 ===== */
.page-about__philosophy {
  background: var(--page-bg);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: var(--page-radius);
}

.page-about__philosophy-bg {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--page-blue);
  position: relative;
}

.page-about__philosophy-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
  opacity: 0.7;
}

.page-about__philosophy-body {
  padding: 32px 24px;
  background: linear-gradient(135deg, var(--page-bg) 60%, #2a2a4a);
}

.page-about__lead {
  font-size: 1.1rem;
  font-family: var(--page-font-body);
  color: var(--page-gold);
  margin: 16px 0 12px 0;
  line-height: 1.7;
  max-width: 680px;
}

.page-about__text {
  font-size: 0.95rem;
  color: var(--page-gray);
  margin: 0 0 20px 0;
  max-width: 600px;
}

.page-about__philosophy-stat {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid rgba(255,107,53,0.3);
}

.page-about__stat-num {
  font-family: var(--page-font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--page-accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-about__stat-bar {
  width: 32px;
  height: 4px;
  background: var(--page-accent);
  border-radius: 2px;
  opacity: 0.6;
}

/* ===== 发展历程 ===== */
.page-about__history {
  background: var(--page-warm);
  color: var(--color-header-color, #1A1A2E);
  padding: 40px 24px;
}

.page-about__history .page-about__section-desc {
  color: #555;
}

/* 时间轴容器 */
.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 12px 0 12px 32px;
  margin-top: 8px;
}

/* 斜线装饰（桌面用伪元素绘制斜线，移动端用竖线） */
.page-about__timeline-line {
  position: absolute;
  top: 0;
  left: 12px;
  bottom: 0;
  width: 4px;
  background: var(--page-accent);
  border-radius: 2px;
  opacity: 0.5;
  transform-origin: top center;
}

/* 时间轴节点 */
.page-about__timeline-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about__node-marker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about__node-dot {
  display: block;
  width: 20px;
  height: 20px;
  background: var(--page-accent);
  border: 3px solid var(--color-header-color, #1A1A2E);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 0 3px var(--page-accent);
  position: relative;
  z-index: 2;
}

.page-about__node-label {
  font-family: var(--page-font-head);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--page-accent);
  background: var(--color-header-color, #1A1A2E);
  padding: 4px 16px;
  border-radius: var(--page-pill);
  color: var(--page-warm);
}

/* details/summary 交互 */
.page-about__node-details {
  margin-left: 32px;
  border-left: 2px solid rgba(255,107,53,0.25);
  padding-left: 16px;
}

.page-about__node-summary {
  font-family: var(--page-font-head);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  padding: 4px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-header-color, #1A1A2E);
  transition: color var(--page-transition);
}

.page-about__node-summary::-webkit-details-marker {
  display: none;
}

.page-about__node-summary::before {
  content: '+';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--page-accent);
  color: var(--color-white, #FFFFFF);
  border-radius: 50%;
  font-family: var(--page-font-head);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform var(--page-transition);
}

.page-about__node-details[open] .page-about__node-summary::before {
  content: '−';
  transform: rotate(180deg);
}

.page-about__node-summary:hover,
.page-about__node-summary:focus-visible {
  color: var(--page-accent);
  outline: none;
}

.page-about__node-body {
  margin-top: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.5);
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: #333;
}

.page-about__node-body p {
  margin: 0;
}

/* ===== 服务特色 ===== */
.page-about__features {
  background: linear-gradient(145deg, #222244, var(--page-bg));
  padding: 40px 24px;
  position: relative;
}

.page-about__features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.page-about__feature-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,107,53,0.15);
  border-radius: var(--page-radius);
  padding: 24px 20px;
  transition: transform var(--page-transition), box-shadow var(--page-transition);
}

.page-about__feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.15);
  border-color: rgba(255,107,53,0.35);
}

.page-about__feature-icon {
  display: inline-block;
  font-family: var(--page-font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--page-gold);
  opacity: 0.6;
  line-height: 1;
  margin-bottom: 8px;
}

.page-about__feature-title {
  font-family: var(--page-font-head);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: var(--color-white, #FFFFFF);
}

.page-about__feature-text {
  font-size: 0.9rem;
  color: var(--page-gray);
  margin: 0;
  line-height: 1.6;
}

.page-about__features-visual {
  display: flex;
  justify-content: center;
  margin-top: 12px;
}

.page-about__features-phone {
  width: 140px;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  border: 2px solid rgba(255,215,0,0.3);
  object-fit: cover;
}

/* ===== 本地社群 ===== */
.page-about__community {
  background: var(--page-warm);
  color: var(--color-header-color, #1A1A2E);
  padding: 40px 24px;
}

.page-about__community .page-about__section-desc {
  color: #555;
}

.page-about__community-body {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}

.page-about__community-text {
  flex: 1;
}

.page-about__community-text p {
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 12px 0;
  max-width: 600px;
}

.page-about__community-text p:last-child {
  margin-bottom: 0;
}

.page-about__community-map {
  flex-shrink: 0;
  background: var(--color-white, #FFFFFF);
  border-radius: var(--page-radius);
  padding: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.page-about__map-img {
  width: 120px;
  height: auto;
  display: block;
  object-fit: contain;
}

.page-about__community-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  padding: 10px 20px;
  background: var(--color-header-color, #1A1A2E);
  border-radius: var(--page-pill);
  font-size: 0.85rem;
}

.page-about__tag-label {
  font-family: var(--page-font-head);
  font-weight: 700;
  color: var(--page-gold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-about__tag-value {
  font-family: var(--page-font-body);
  color: var(--page-warm);
  font-weight: 400;
}

/* ===== 信任声明 ===== */
.page-about__trust {
  text-align: center;
  padding: 24px 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 8px;
}

.page-about__trust p {
  font-size: 0.85rem;
  color: var(--page-gray);
  margin: 0;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 768px) {
  .page-about__inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
    padding-top: 48px;
  }

  /* 索引改为垂直侧边 */
  .page-about__index {
    position: sticky;
    top: 32px;
    order: 0;
    flex-shrink: 0;
    width: var(--page-index-width, 180px);
    padding: 28px 16px;
    border-radius: var(--page-radius);
    background: var(--page-warm);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  }

  .page-about__index-list {
    flex-direction: column;
    gap: 8px;
  }

  .page-about__index-link {
    padding: 10px 16px;
    font-size: 0.95rem;
    border-radius: 12px;
    white-space: normal;
  }

  .page-about__index-ornament {
    display: block;
    height: 2px;
    background: linear-gradient(90deg, var(--page-accent), transparent);
    margin-top: 16px;
    opacity: 0.4;
  }

  /* 内容区占剩余宽度 */
  .page-about__content {
    flex: 1;
    min-width: 0;
    gap: 64px;
  }

  /* 品牌理念 */
  .page-about__philosophy {
    flex-direction: row;
    min-height: 340px;
  }

  .page-about__philosophy-bg {
    width: 40%;
    height: auto;
    min-height: 340px;
  }

  .page-about__philosophy-body {
    width: 60%;
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .page-about__heading--xl {
    font-size: 3.6rem;
  }

  .page-about__lead {
    font-size: 1.2rem;
  }

  /* 时间轴：桌面版增加斜线效果 */
  .page-about__timeline {
    padding-left: 40px;
  }

  .page-about__timeline-line {
    left: 16px;
    width: 5px;
    background: linear-gradient(to bottom, var(--page-accent), var(--page-gold));
    transform: rotate(0deg);
    opacity: 0.6;
  }

  .page-about__node-dot {
    width: 24px;
    height: 24px;
  }

  .page-about__node-label {
    font-size: 0.9rem;
  }

  .page-about__node-summary {
    font-size: 1.2rem;
  }

  .page-about__node-details {
    margin-left: 40px;
  }

  /* 服务特色网格 */
  .page-about__features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__features {
    padding: 48px 36px;
  }

  .page-about__features-visual {
    justify-content: flex-end;
    margin-top: 0;
    position: absolute;
    right: 36px;
    bottom: 48px;
    opacity: 0.3;
    pointer-events: none;
  }

  .page-about__features-phone {
    width: 160px;
  }

  /* 本地社群并排 */
  .page-about__community-body {
    flex-direction: row;
    align-items: center;
    gap: 40px;
  }

  .page-about__map-img {
    width: 140px;
  }

  .page-about__community {
    padding: 48px 36px;
  }
}

/* ===== 桌面端额外优化 ===== */
@media (min-width: 1024px) {
  .page-about__inner {
    gap: 56px;
  }

  .page-about__index {
    width: 200px;
    padding: 32px 20px;
  }

  .page-about__heading--xl {
    font-size: 4.2rem;
  }

  .page-about__philosophy-body {
    padding: 48px 44px;
  }

  .page-about__features-grid {
    gap: 28px;
  }

  .page-about__feature-card {
    padding: 28px 24px;
  }

  /* 时间轴斜线效果更强：用旋转制造视觉动势 */
  .page-about__timeline {
    padding-left: 48px;
  }

  .page-about__timeline-line {
    left: 20px;
    width: 6px;
    background: linear-gradient(to bottom, var(--page-accent), var(--page-gold), var(--page-accent));
  }
}

/* ===== 超大屏 ===== */
@media (min-width: 1280px) {
  .page-about__content {
    gap: 80px;
  }

  .page-about__section {
    padding: 56px 44px;
  }

  .page-about__features {
    padding: 56px 44px;
  }

  .page-about__community {
    padding: 56px 44px;
  }
}

/* ===== 移动端小屏修正 ===== */
@media (max-width: 374px) {
  .page-about__heading--xl {
    font-size: 2.2rem;
  }

  .page-about__philosophy-body {
    padding: 24px 16px;
  }

  .page-about__features-phone {
    width: 100px;
  }

  .page-about__map-img {
    width: 90px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .page-about__index {
    display: none;
  }

  .page-about__inner {
    flex-direction: column;
    gap: 32px;
  }

  .page-about__philosophy-bg {
    height: 160px;
  }

  .page-about__features-visual {
    display: none;
  }

  .page-about__timeline-line {
    display: none;
  }

  .page-about__node-details[open] .page-about__node-body {
    display: block !important;
  }
}

.page-about {
  --color-header-color: transparent;
}