/* ===== 品牌故事页专属样式 ===== */
.page-about {
  display: block;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md, 16px);
  padding-top: calc(var(--header-h, 60px) + var(--space-lg, 24px));
  background-color: var(--color-deep-space, #0B1A3B);
  color: var(--color-white, #FFFFFF);
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  line-height: 1.6;
  --about-gold: var(--color-star-gold, #FFD700);
  --about-red: var(--color-arena-red, #E63946);
  --about-card-bg: var(--color-card-bg, #112240);
  --about-grid: var(--color-grid-line, #2D3B5A);
  --about-glow: 0 0 30px rgba(255, 215, 0, 0.08);
  --about-section-gap: var(--space-2xl, 32px);
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm, 8px);
  margin-bottom: var(--space-lg, 24px);
  font-family: var(--font-nav, Arial, Helvetica, sans-serif);
  font-size: 14px;
  color: var(--color-gray, #B0B0B0);
}

.page-about .breadcrumb a {
  color: var(--about-gold);
  text-decoration: none;
  transition: opacity var(--transition, 0.25s ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--about-gold);
  outline-offset: 2px;
}

.page-about .breadcrumb span[aria-current="page"] {
  color: var(--color-white, #FFFFFF);
  font-weight: 600;
}

/* ===== 页面标题区 ===== */
.page-about .story-claim {
  position: relative;
  margin-bottom: var(--space-2xl, 32px);
  padding: var(--space-lg, 24px) 0;
  border-bottom: 1px solid var(--about-grid);
}

.page-about .claim-headline {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 32px;
  font-weight: 900;
  line-height: 1.15;
  color: var(--color-white, #FFFFFF);
  margin: 0 0 var(--space-sm, 8px) 0;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.page-about .claim-sub {
  font-size: 16px;
  color: var(--color-gray, #B0B0B0);
  max-width: 640px;
  margin: 0;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  line-height: 1.5;
}

/* ===== 通用章节容器 ===== */
.page-about .story-section {
  position: relative;
  margin-bottom: var(--about-section-gap);
}

.page-about .section-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 24px);
  align-items: flex-start;
}

/* ===== 章节编号 ===== */
.page-about .section-number {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
  color: var(--about-gold);
  -webkit-text-stroke: 1px var(--about-gold);
  -webkit-text-fill-color: transparent;
  text-stroke: 1px var(--about-gold);
  text-fill-color: transparent;
  opacity: 0.4;
  flex-shrink: 0;
  margin-bottom: var(--space-sm, 8px);
  letter-spacing: -0.03em;
}

.page-about .section-number.light {
  -webkit-text-stroke-color: var(--color-white, #FFFFFF);
  text-stroke-color: var(--color-white, #FFFFFF);
  opacity: 0.6;
}

/* ===== 章节标题与正文 ===== */
.page-about .section-heading {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-white, #FFFFFF);
  margin: 0 0 var(--space-sm, 8px) 0;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-about .section-text {
  font-size: 16px;
  color: var(--color-gray, #B0B0B0);
  margin: 0 0 var(--space-md, 16px) 0;
  max-width: 600px;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  line-height: 1.7;
}

.page-about .section-text:last-of-type {
  margin-bottom: 0;
}

/* ===== 01 章节：兵马俑交互卡片 ===== */
.page-about .cultural-note {
  display: block;
  margin-top: var(--space-lg, 24px);
  border: 1px solid var(--about-grid);
  border-radius: var(--radius-md, 8px);
  background-color: var(--about-card-bg);
  overflow: hidden;
  transition: border-color var(--transition, 0.25s ease);
  max-width: 320px;
}

.page-about .cultural-note[open] {
  border-color: var(--about-gold);
  box-shadow: var(--about-glow);
}

.page-about .note-trigger {
  display: block;
  cursor: pointer;
  padding: var(--space-sm, 8px);
  list-style: none;
  position: relative;
  transition: background-color var(--transition, 0.25s ease);
}

.page-about .note-trigger::-webkit-details-marker {
  display: none;
}

.page-about .note-trigger:hover,
.page-about .note-trigger:focus-visible {
  background-color: rgba(255, 215, 0, 0.04);
  outline: none;
}

.page-about .note-trigger:focus-visible {
  outline: 2px solid var(--about-gold);
  outline-offset: -2px;
}

.page-about .note-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 300px;
  border-radius: var(--radius-sm, 4px);
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.page-about .click-hint {
  display: block;
  text-align: center;
  padding: var(--space-xs, 4px) 0 var(--space-sm, 8px) 0;
  font-family: var(--font-nav, Arial, Helvetica, sans-serif);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--about-gold);
  font-weight: 600;
}

.page-about .note-panel {
  padding: var(--space-md, 16px) var(--space-lg, 24px) var(--space-lg, 24px);
  border-top: 1px solid var(--about-grid);
  animation: fadeSlideIn 0.3s ease;
}

.page-about .note-text {
  font-size: 15px;
  color: var(--color-gray, #B0B0B0);
  margin: 0;
  line-height: 1.6;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 02 章节：全宽背景叠加 ===== */
.page-about .section-alt {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg, 16px);
  min-height: 360px;
  display: flex;
  align-items: center;
}

.page-about .section-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .section-bg-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  filter: brightness(0.5) saturate(0.8) contrast(1.1);
}

.page-about .section-overlay {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 16px);
  padding: var(--space-xl, 32px) var(--space-lg, 24px);
  background: linear-gradient(135deg, rgba(11, 26, 59, 0.92) 0%, rgba(11, 26, 59, 0.6) 70%, transparent 100%);
  width: 100%;
}

.page-about .overlay-content {
  max-width: 580px;
}

.page-about .overlay-content .section-text {
  color: rgba(255, 255, 255, 0.85);
}

/* ===== 03 章节：数据图标 ===== */
.page-about .data-icon {
  display: block;
  width: 120px;
  height: auto;
  max-width: 150px;
  margin-top: var(--space-lg, 24px);
  border-radius: var(--radius-md, 8px);
  background-color: var(--about-card-bg);
  padding: var(--space-md, 16px);
  border: 1px solid var(--about-grid);
  aspect-ratio: 1 / 1;
  object-fit: contain;
}

/* ===== 星轨分隔线 ===== */
.page-about .star-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg, 24px);
  padding: var(--space-lg, 24px) 0;
  margin: 0 auto;
  max-width: 400px;
  position: relative;
}

.page-about .star-divider::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-gold), transparent);
  opacity: 0.3;
}

.page-about .star-dot {
  position: relative;
  z-index: 1;
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--about-gold);
  box-shadow: 0 0 12px rgba(255, 215, 0, 0.5);
  opacity: 0.7;
  transition: opacity var(--transition, 0.25s ease), transform var(--transition, 0.25s ease);
}

.page-about .star-dot:nth-child(2) {
  width: 14px;
  height: 14px;
  opacity: 0.9;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.7);
}

.page-about .star-dot:hover {
  opacity: 1;
  transform: scale(1.3);
}

/* ===== 结尾总结 ===== */
.page-about .story-epilogue {
  margin-top: var(--space-2xl, 32px);
  padding: var(--space-lg, 24px) 0;
  border-top: 1px solid var(--about-grid);
  text-align: center;
}

.page-about .epilogue-text {
  font-size: 15px;
  color: var(--color-gray, #B0B0B0);
  max-width: 720px;
  margin: 0 auto var(--space-lg, 24px);
  line-height: 1.7;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
}

.page-about .epilogue-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md, 16px);
}

/* ===== 按钮（复用全局类名，但在此页微调） ===== */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm, 8px) var(--space-lg, 24px);
  font-family: var(--font-nav, Arial, Helvetica, sans-serif);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all var(--transition, 0.25s ease);
  min-height: 44px;
}

.page-about .btn-outline {
  color: var(--about-gold);
  border-color: var(--about-gold);
  background-color: transparent;
}

.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background-color: var(--about-gold);
  color: var(--color-deep-space, #0B1A3B);
  outline: none;
}

.page-about .btn-primary {
  color: var(--color-deep-space, #0B1A3B);
  background-color: var(--about-gold);
  border-color: var(--about-gold);
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background-color: transparent;
  color: var(--about-gold);
  outline: none;
}

.page-about .btn:focus-visible {
  outline: 2px solid var(--color-white, #FFFFFF);
  outline-offset: 2px;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 640px) {
  .page-about {
    padding: var(--space-lg, 24px);
    padding-top: calc(var(--header-h, 60px) + var(--space-xl, 32px));
  }

  .page-about .claim-headline {
    font-size: 44px;
  }

  .page-about .claim-sub {
    font-size: 18px;
  }

  .page-about .section-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl, 32px);
  }

  .page-about .section-number {
    font-size: 96px;
    opacity: 0.5;
    margin-bottom: 0;
    min-width: 100px;
  }

  .page-about .section-heading {
    font-size: 32px;
  }

  .page-about .section-text {
    font-size: 17px;
  }

  .page-about .section-alt {
    min-height: 400px;
  }

  .page-about .section-overlay {
    padding: var(--space-2xl, 32px) var(--space-xl, 32px);
  }

  .page-about .data-icon {
    width: 150px;
  }

  .page-about .story-epilogue {
    padding: var(--space-xl, 32px) var(--space-lg, 24px);
  }

  .page-about .epilogue-text {
    font-size: 16px;
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 1024px) {
  .page-about {
    padding: var(--space-xl, 32px);
    padding-top: calc(var(--header-h, 60px) + var(--space-2xl, 32px));
  }

  .page-about .story-claim {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-end;
    padding: var(--space-xl, 32px) 0;
  }

  .page-about .claim-headline {
    font-size: 52px;
    max-width: 700px;
  }

  .page-about .claim-sub {
    font-size: 18px;
    max-width: 400px;
    text-align: right;
  }

  .page-about .section-number {
    font-size: 120px;
    min-width: 130px;
  }

  .page-about .section-heading {
    font-size: 36px;
  }

  .page-about .section-alt {
    min-height: 460px;
    border-radius: var(--radius-lg, 16px);
  }

  .page-about .section-overlay {
    padding: var(--space-2xl, 32px) var(--space-3xl, 40px);
  }

  .page-about .cultural-note {
    max-width: 340px;
  }

  .page-about .story-epilogue {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }

  .page-about .epilogue-text {
    margin: 0;
    flex: 1;
    max-width: 640px;
  }

  .page-about .epilogue-links {
    justify-content: flex-end;
    flex-shrink: 0;
  }
}

/* ===== 窄屏安全 ===== */
@media (max-width: 380px) {
  .page-about {
    padding: var(--space-sm, 8px);
    padding-top: calc(var(--header-h, 60px) + var(--space-md, 16px));
  }

  .page-about .claim-headline {
    font-size: 24px;
  }

  .page-about .section-number {
    font-size: 56px;
  }

  .page-about .section-heading {
    font-size: 20px;
  }

  .page-about .cultural-note {
    max-width: 100%;
  }

  .page-about .data-icon {
    width: 100px;
  }

  .page-about .btn {
    font-size: 13px;
    padding: var(--space-xs, 4px) var(--space-md, 16px);
  }
}