/* ===== 品牌档案页专属样式 ===== */
.page-about {
  --about-accent: #FF8C42;
  --about-primary: #4B9B82;
  --about-secondary: #B8D4D0;
  --about-bg-light: #F5F8F6;
  --about-text: #1A2E28;
  --about-text-muted: #5B7A70;
  --about-glass: rgba(255,255,255,0.6);
  --about-border: #D0E2DB;
  --about-grad-bg: linear-gradient(135deg, rgba(75,155,130,0.08) 0%, rgba(184,212,208,0.12) 100%);
  --about-card-shadow: 0 8px 32px rgba(42,77,69,0.06);
  --about-spacer: 3rem;

  display: flex;
  flex-direction: column;
  gap: 0;
  background-color: var(--about-bg-light);
  color: var(--about-text);
  font-family: var(--font-body, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: 0 1.25rem;
}

/* ---- 面包屑 ---- */
.about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.85rem;
  color: var(--about-text-muted);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.about-breadcrumb a {
  color: var(--about-primary);
  text-decoration: none;
  transition: opacity 0.25s ease;
}
.about-breadcrumb a:hover,
.about-breadcrumb a:focus-visible {
  opacity: 0.7;
  text-decoration: underline;
}
.about-breadcrumb-sep {
  color: var(--about-border);
  font-weight: 300;
}
.about-breadcrumb [aria-current="page"] {
  color: var(--about-text);
  font-weight: 500;
}

/* ---- 首屏 Hero ---- */
.about-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0 3.5rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  position: relative;
}
.about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--about-grad-bg);
  border-radius: 2rem;
  pointer-events: none;
  z-index: 0;
}
.about-hero-image,
.about-hero-text {
  position: relative;
  z-index: 1;
}
.about-hero-image {
  flex-shrink: 0;
  width: clamp(180px, 40vw, 300px);
  height: clamp(180px, 40vw, 300px);
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(42,77,69,0.12);
  background: linear-gradient(145deg, var(--about-secondary) 0%, var(--about-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}
.about-hero-image img:hover {
  transform: scale(1.03);
}
.about-hero-text {
  text-align: center;
  max-width: 580px;
}
.about-hero-title {
  font-family: var(--font-heading, 'STKaiti', 'KaiTi', 'SimSun', 'Noto Serif SC', serif);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  color: var(--about-primary);
  margin: 0 0 0.25rem;
  letter-spacing: 0.04em;
  line-height: 1.15;
}
.about-hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--about-text-muted);
  margin: 0 0 1.2rem;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--about-border);
  display: inline-block;
  padding-bottom: 0.4rem;
}
.about-hero-desc {
  font-size: 1.05rem;
  color: var(--about-text);
  margin: 0;
  line-height: 1.6;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- 通用章节标题 ---- */
.about-section-heading {
  font-family: var(--font-heading, 'STKaiti', 'KaiTi', 'SimSun', 'Noto Serif SC', serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--about-primary);
  margin: 0 0 1.2rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}
.about-section-heading::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--about-primary);
  border-radius: 2px;
  margin-top: 0.4rem;
  opacity: 0.4;
}

/* ---- 我们的故事 ---- */
.about-story {
  padding: 3rem 0;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.about-story-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: flex-start;
}
.about-story-content {
  flex: 1;
  max-width: 700px;
}
.about-story-content p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--about-text);
}
.about-story-content .data-highlight {
  color: var(--about-accent);
  font-weight: 600;
}
.about-story-signature {
  font-family: var(--font-heading, 'STKaiti', 'KaiTi', 'SimSun', 'Noto Serif SC', serif);
  font-size: 1.05rem;
  color: var(--about-text-muted);
  margin-top: 1.5rem !important;
  padding-left: 1rem;
  border-left: 3px solid var(--about-primary);
  opacity: 0.8;
}
.about-story-decoration {
  flex-shrink: 0;
  width: 100%;
  max-width: 300px;
  height: 180px;
  position: relative;
  overflow: hidden;
  border-radius: 1.5rem;
  background: var(--about-grad-bg);
}
.about-story-shape {
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--about-secondary), transparent 70%);
  top: -60px;
  right: -60px;
  opacity: 0.5;
}

/* ---- 核心使命 ---- */
.about-mission {
  padding: 3rem 0;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.about-mission-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}
.about-mission-image {
  width: 100%;
  max-width: 800px;
  border-radius: 1.5rem;
  overflow: hidden;
  box-shadow: var(--about-card-shadow);
  background: var(--about-secondary);
}
.about-mission-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.about-mission-content {
  flex: 1;
  max-width: 700px;
}
.about-mission-claim {
  font-family: var(--font-heading, 'STKaiti', 'KaiTi', 'SimSun', 'Noto Serif SC', serif);
  font-size: clamp(1.15rem, 2.5vw, 1.55rem);
  font-weight: 600;
  color: var(--about-primary);
  margin: 0 0 1rem;
  line-height: 1.4;
}
.about-mission-content p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--about-text);
}
.about-mission-content .btn {
  margin-top: 0.5rem;
}

/* ---- 价值承诺（可展开卡片） ---- */
.about-values {
  padding: 3rem 0;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.about-values-heading {
  margin-bottom: 0.5rem !important;
}
.about-values-intro {
  color: var(--about-text-muted);
  margin: 0 0 2rem;
  font-size: 0.98rem;
  max-width: 600px;
}
.about-values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.about-value-card {
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--about-border);
  border-radius: 1.25rem;
  box-shadow: var(--about-card-shadow);
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  list-style: none;
}
.about-value-card[open] {
  box-shadow: 0 12px 40px rgba(42,77,69,0.10);
  background: rgba(255,255,255,0.8);
}
.about-value-card:hover {
  transform: translateY(-2px);
}
.about-value-summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--about-text);
  user-select: none;
  -webkit-user-select: none;
  list-style: none;
}
.about-value-summary::-webkit-details-marker {
  display: none;
}
.about-value-summary::marker {
  display: none;
  content: '';
}
.about-value-icon {
  font-family: var(--font-heading, 'STKaiti', 'KaiTi', 'SimSun', 'Noto Serif SC', serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--about-primary);
  opacity: 0.7;
  min-width: 2rem;
}
.about-value-label {
  flex: 1;
}
.about-value-toggle {
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--about-primary);
  transition: transform 0.3s ease;
  line-height: 1;
}
.about-value-card[open] .about-value-toggle {
  transform: rotate(45deg);
}
.about-value-detail {
  padding: 0 1.5rem 1.5rem;
  color: var(--about-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid var(--about-border);
  margin-top: 0;
  padding-top: 1.25rem;
}
.about-value-detail p {
  margin: 0 0 1rem;
}
.about-value-detail img {
  width: 100%;
  max-width: 700px;
  height: auto;
  border-radius: 1rem;
  display: block;
  object-fit: cover;
  margin-top: 0.5rem;
}

/* ---- 内部链接区域 ---- */
.about-links {
  padding: 3rem 0 4rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.about-links-heading {
  margin-bottom: 1.5rem !important;
}
.about-links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.about-link-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--about-text);
  border-radius: 1.25rem;
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--about-border);
  box-shadow: var(--about-card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.about-link-card:hover,
.about-link-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(42,77,69,0.10);
  background: rgba(255,255,255,0.85);
}
.about-link-icon {
  font-size: 1.4rem;
  color: var(--about-primary);
  opacity: 0.6;
  margin-bottom: 0.25rem;
}
.about-link-title {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--about-text);
}
.about-link-desc {
  font-size: 0.9rem;
  color: var(--about-text-muted);
  line-height: 1.4;
}

/* ---- 共享工具类（仅供本页使用） ---- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.8rem;
  border-radius: 2rem;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.3s ease, transform 0.25s ease, box-shadow 0.3s ease;
  border: none;
  cursor: pointer;
  line-height: 1.4;
  background: transparent;
  color: var(--about-text);
}
.page-about .btn-accent {
  background: var(--about-accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,140,66,0.25);
}
.page-about .btn-accent:hover,
.page-about .btn-accent:focus-visible {
  background: #e67a30;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,140,66,0.30);
}
.page-about .glass {
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.page-about .card {
  border-radius: 1.25rem;
}
.page-about .data-highlight {
  color: var(--about-accent);
  font-weight: 600;
}

/* ============================================ */
/* 桌面端媒体查询 >= 768px                       */
/* ============================================ */
@media (min-width: 768px) {
  .page-about {
    padding: 0 2rem;
  }

  .about-hero {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 3rem;
    padding: 3rem 0 4.5rem;
    text-align: left;
  }
  .about-hero::before {
    border-radius: 3rem;
  }
  .about-hero-image {
    width: clamp(260px, 32vw, 400px);
    height: clamp(260px, 32vw, 400px);
    order: 1;
  }
  .about-hero-text {
    text-align: left;
    order: 2;
    flex: 1;
  }
  .about-hero-title {
    font-size: clamp(2.6rem, 5vw, 4rem);
  }
  .about-hero-desc {
    margin-left: 0;
    margin-right: 0;
  }
  .about-hero-subtitle {
    border-bottom: none;
    padding-bottom: 0;
    position: relative;
  }
  .about-hero-subtitle::after {
    content: '';
    display: block;
    width: 3rem;
    height: 2px;
    background: var(--about-primary);
    margin-top: 0.3rem;
    opacity: 0.3;
  }

  .about-story-inner {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
  }
  .about-story-decoration {
    width: 240px;
    height: 240px;
    max-width: 240px;
  }
  .about-story-shape {
    width: 300px;
    height: 300px;
    top: -80px;
    right: -80px;
  }

  .about-mission-inner {
    flex-direction: row;
    gap: 3rem;
    align-items: center;
  }
  .about-mission-image {
    flex: 1;
    max-width: 50%;
  }
  .about-mission-content {
    flex: 1;
  }

  .about-values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-value-card {
    break-inside: avoid;
  }

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

  .about-section-heading::after {
    width: 50%;
  }
}

/* ============================================ */
/* 大桌面端 >= 1024px                            */
/* ============================================ */
@media (min-width: 1024px) {
  .page-about {
    padding: 0 3rem;
  }
  .about-hero {
    gap: 4rem;
    padding: 4rem 0 5rem;
  }
  .about-story {
    padding: 4rem 0;
  }
  .about-mission {
    padding: 4rem 0;
  }
  .about-values {
    padding: 4rem 0;
  }
  .about-links {
    padding: 4rem 0 5rem;
  }
  .about-mission-image {
    max-width: 45%;
  }
  .about-values-grid {
    gap: 1.5rem;
  }
}

/* ============================================ */
/* 超小屏保护（防止横向溢出）                    */
/* ============================================ */
@media (max-width: 480px) {
  .page-about {
    padding: 0 0.75rem;
  }
  .about-hero-image {
    width: 160px;
    height: 160px;
  }
  .about-value-summary {
    padding: 1rem 1.25rem;
    font-size: 0.98rem;
  }
  .about-value-detail {
    padding: 0 1.25rem 1.25rem;
    font-size: 0.9rem;
  }
  .about-link-card {
    padding: 1.25rem;
  }
}

/* 确保所有图片响应式 */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 平滑过渡 */
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}