/* ===== 品牌概况页专属样式 ===== */
.page-about {
  --color-primary-dark: #0A1F3F;
  --color-primary-gold: #D4A843;
  --color-accent-red: #E63946;
  --color-accent-green: #2A9D8F;
  --color-bg-warm: #F5EFE0;
  --color-bg-ink: #1D1D1D;
  --color-text-light: #FFFFFF;
  --color-text-dark: #0A1F3F;
  --color-data-highlight: #F4A261;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-body: 'Merriweather', Georgia, 'Times New Roman', serif;
  --font-scale-h1: 2.5rem;
  --font-scale-h2: 1.8rem;
  --font-scale-h3: 1.35rem;
  --max-width: 1200px;
  --shadow-card: 0 2px 12px rgba(10, 31, 63, 0.08);
  --border-radius: 6px;
  --transition-speed: 0.3s;

  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
  font-family: var(--font-body);
  color: var(--color-text-dark);
  background-color: var(--color-bg-warm);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.page-about__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.page-about__breadcrumb-link {
  color: var(--color-primary-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-speed);
}
.page-about__breadcrumb-link:hover,
.page-about__breadcrumb-link:focus-visible {
  border-color: var(--color-primary-gold);
}
.page-about__breadcrumb-sep {
  color: var(--color-primary-gold);
  font-weight: 700;
}
.page-about__breadcrumb-current {
  color: var(--color-primary-gold);
  font-weight: 600;
}

/* ---------- 页面主标题 ---------- */
.page-about__title {
  font-family: var(--font-heading);
  font-size: var(--font-scale-h1);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary-dark);
  margin: 0 0 1.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 4px solid var(--color-primary-gold);
  letter-spacing: -0.02em;
}

/* ---------- 通用section样式 ---------- */
.page-about .section {
  margin-bottom: 3rem;
  position: relative;
}

/* ---------- 编号与展开按钮 ---------- */
.page-about__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  width: auto;
  transition: opacity var(--transition-speed);
}
.page-about__toggle:hover,
.page-about__toggle:focus-visible {
  opacity: 0.85;
}
.page-about__toggle:focus-visible {
  outline: 2px solid var(--color-primary-gold);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-about__num {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary-gold);
  letter-spacing: -0.04em;
  transition: transform var(--transition-speed);
  display: inline-block;
}
.page-about__toggle[aria-expanded="false"] .page-about__num {
  transform: scale(0.95);
  opacity: 0.6;
}

.page-about__heading {
  font-family: var(--font-heading);
  font-size: var(--font-scale-h2);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 0;
  line-height: 1.2;
}

.page-about__toggle-hint {
  font-size: 0.7rem;
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--color-primary-gold);
  opacity: 0.7;
  margin-left: auto;
  white-space: nowrap;
}
.page-about__toggle[aria-expanded="false"] + .page-about__toggle-hint [data-hint]::before {
  content: "点击展开";
}

/* ---------- 可折叠内容区域 ---------- */
.page-about__content {
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  max-height: 2000px;
  opacity: 1;
  margin-top: 1rem;
}
.page-about__toggle[aria-expanded="false"] ~ .page-about__content {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  padding-top: 0;
  padding-bottom: 0;
}

/* ---------- 品牌故事区 ---------- */
.page-about__story {
  padding: 1.5rem 1.25rem;
  background: var(--color-bg-warm);
  border: 2px solid var(--color-primary-dark);
  box-shadow: 6px 6px 0 var(--color-primary-dark);
  position: relative;
}
.page-about__story::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 12px;
  right: 12px;
  height: 4px;
  background: var(--color-primary-gold);
}

.page-about__story-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.page-about__story-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.page-about__story-text {
  flex: 1;
  min-width: 0;
}
.page-about__story-lead {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  border-left: 4px solid var(--color-primary-gold);
  padding-left: 1rem;
  margin-bottom: 1rem;
}
.page-about__story-text p {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  color: #2c3e50;
}
.page-about__story-text p:last-child {
  margin-bottom: 0;
}

.page-about__story-figure {
  margin: 0;
  flex-shrink: 0;
}
.page-about__story-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: cover;
  border: 3px solid var(--color-primary-dark);
  box-shadow: 4px 4px 0 var(--color-primary-dark);
  display: block;
}

/* ---------- 内联链接 ---------- */
.page-about__inline-link {
  color: var(--color-primary-dark);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--color-primary-gold);
  text-underline-offset: 3px;
  transition: color var(--transition-speed), text-decoration-color var(--transition-speed);
}
.page-about__inline-link:hover,
.page-about__inline-link:focus-visible {
  color: var(--color-primary-gold);
  text-decoration-color: var(--color-primary-dark);
}

/* ---------- 服务区 ---------- */
.page-about__services {
  padding: 1.5rem 1.25rem;
  background: var(--color-primary-dark);
  color: var(--color-text-light);
  border: 2px solid var(--color-primary-gold);
  box-shadow: 6px 6px 0 var(--color-primary-gold);
  position: relative;
}
.page-about__services::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 12px;
  right: 12px;
  height: 4px;
  background: var(--color-accent-red);
}

.page-about__services-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}
.page-about__services .page-about__num {
  color: var(--color-primary-gold);
}
.page-about__services .page-about__heading {
  color: var(--color-text-light);
}
.page-about__services .page-about__toggle-hint {
  color: var(--color-primary-gold);
}

.page-about__services-intro {
  font-size: 1rem;
  margin: 0 0 1rem;
  color: rgba(255,255,255,0.85);
  max-width: 640px;
}

.page-about__services-figure {
  margin: 0 0 1.5rem;
}
.page-about__services-icon {
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 3/2;
  object-fit: cover;
  border: 3px solid var(--color-primary-gold);
  box-shadow: 4px 4px 0 rgba(212,168,67,0.4);
  display: block;
}

/* ---------- 服务卡片 ---------- */
.page-about__cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-about__card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(212,168,67,0.3);
  padding: 1.25rem 1rem;
  border-radius: 0;
  transition: background var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
  position: relative;
}
.page-about__card:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.page-about__card-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.page-about__card-num {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-gold);
  line-height: 1;
}
.page-about__card-title {
  font-family: var(--font-heading);
  font-size: var(--font-scale-h3);
  font-weight: 700;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.2;
}
.page-about__card-body {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.78);
  margin: 0;
  line-height: 1.55;
}

.page-about__services-cta {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  margin: 0;
}
.page-about__services-cta .page-about__inline-link {
  color: var(--color-primary-gold);
  text-decoration-color: var(--color-primary-gold);
}
.page-about__services-cta .page-about__inline-link:hover {
  color: var(--color-text-light);
  text-decoration-color: var(--color-text-light);
}

/* ---------- 底部品牌理念 ---------- */
.page-about__vision {
  margin-top: 2.5rem;
  padding: 1.5rem 1.25rem;
  background: var(--color-bg-ink);
  color: var(--color-text-light);
  border: 2px solid var(--color-primary-gold);
  box-shadow: 6px 6px 0 var(--color-primary-dark);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-about__vision-figure {
  margin: 0;
  flex-shrink: 0;
}
.page-about__vision-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  aspect-ratio: 5/3;
  object-fit: cover;
  border: 3px solid var(--color-primary-gold);
  box-shadow: 4px 4px 0 rgba(212,168,67,0.3);
  display: block;
}

.page-about__vision-text {
  flex: 1;
  min-width: 0;
}
.page-about__vision-heading {
  font-family: var(--font-heading);
  font-size: var(--font-scale-h2);
  font-weight: 700;
  color: var(--color-primary-gold);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}
.page-about__vision-body {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.82);
  margin: 0 0 1.25rem;
  max-width: 600px;
  line-height: 1.7;
}
.page-about__vision-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-about__vision-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary-gold);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border: 2px solid var(--color-primary-gold);
  transition: background var(--transition-speed), color var(--transition-speed);
}
.page-about__vision-link:hover,
.page-about__vision-link:focus-visible {
  background: var(--color-primary-gold);
  color: var(--color-bg-ink);
}

/* ===== 响应式：桌面端 ===== */
@media (min-width: 768px) {
  .page-about {
    padding: 2rem 2rem 4rem;
  }

  .page-about__title {
    font-size: 3.2rem;
    margin-bottom: 2.5rem;
  }

  /* 品牌故事桌面网格 */
  .page-about__story-grid {
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
  }
  .page-about__story-text {
    flex: 1 1 55%;
  }
  .page-about__story-figure {
    flex: 0 0 auto;
  }
  .page-about__story-img {
    max-width: 360px;
  }

  /* 服务卡片桌面三列 */
  .page-about__cards {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.25rem;
  }
  .page-about__card {
    flex: 1 1 calc(33.33% - 1rem);
    min-width: 200px;
  }

  /* 底部桌面并排 */
  .page-about__vision {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
  .page-about__vision-figure {
    flex: 0 0 auto;
  }
  .page-about__vision-img {
    max-width: 420px;
  }
  .page-about__vision-text {
    flex: 1 1 50%;
  }

  .page-about__num {
    font-size: 5.5rem;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 2.5rem 2.5rem 5rem;
  }

  .page-about__title {
    font-size: 4rem;
  }

  .page-about__num {
    font-size: 6.5rem;
  }

  .page-about__story-img {
    max-width: 400px;
  }

  .page-about__vision-img {
    max-width: 500px;
  }

  .page-about__card {
    padding: 1.5rem;
  }
}