/* ===== 页面专属 CSS：.page-about 品牌故事 ===== */
.page-about {
  --chapter-num-size: clamp(4rem, 12vw, 10rem);
  --chapter-num-color: rgba(26, 58, 92, 0.08);
  --hero-min-height: clamp(60vh, 70vh, 80vh);
  --card-clip: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  --divider-skew-angle: 2deg;
  --mountain-height: 80px;

  background: var(--clr-secondary);
  color: var(--clr-neutral2);
  font-family: var(--font-body);
  line-height: var(--lh-body);
  padding: 0;
  margin: 0;
  min-height: 100vh;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-lg) 0;
  font-size: var(--size-caption);
  color: var(--clr-primary-light);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.page-about .breadcrumb a {
  color: var(--clr-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--clr-accent1);
  text-decoration: underline;
}

.page-about .breadcrumb .separator {
  color: var(--clr-primary-light);
  opacity: 0.5;
  user-select: none;
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--clr-neutral2);
  font-weight: var(--fw-heading);
}

/* ===== 首屏 Hero ===== */
.page-about .hero {
  display: grid;
  grid-template-columns: 1fr;
  min-height: var(--hero-min-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
  box-sizing: border-box;
  gap: var(--spacing-xl);
  align-items: center;
}

.page-about .hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  order: 1;
}

.page-about .hero-flag {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: var(--size-caption);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent1);
  border-left: 4px solid var(--clr-accent1);
  padding-left: var(--spacing-sm);
  line-height: 1.2;
}

.page-about .hero-title {
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: var(--size-heading);
  line-height: 1.15;
  color: var(--clr-primary);
  margin: 0;
  letter-spacing: var(--ls-heading);
}

.page-about .hero-desc {
  font-size: var(--size-body);
  color: var(--clr-primary-light);
  max-width: 32em;
  margin: 0;
  line-height: var(--lh-body);
}

.page-about .hero-visual {
  order: 0;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  box-shadow: var(--shadow-md);
  background: var(--clr-primary);
}

.page-about .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: cover;
  aspect-ratio: 800 / 500;
}

/* ===== 山形分割装饰 ===== */
.page-about .mountain-divider {
  width: 100%;
  height: var(--mountain-height);
  overflow: hidden;
  line-height: 0;
  margin: 0;
  padding: 0;
}

.page-about .mountain-divider--flip {
  transform: rotate(180deg);
}

.page-about .mountain-svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* ===== 斜切分割线 ===== */
.page-about .skew-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  transform: skewY(var(--divider-skew-angle));
}

.page-about .skew-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary-light), transparent);
  border-radius: 1px;
}

.page-about .skew-line:last-child {
  background: linear-gradient(270deg, var(--clr-primary-light), transparent);
}

.page-about .skew-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-accent1);
  flex-shrink: 0;
}

/* ===== 章节通用 ===== */
.page-about .chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  box-sizing: border-box;
  align-items: start;
}

.page-about .chapter-number {
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: var(--chapter-num-size);
  line-height: 0.85;
  color: var(--chapter-num-color);
  user-select: none;
  pointer-events: none;
  letter-spacing: -0.04em;
  margin: 0;
  padding: 0;
}

.page-about .chapter-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.page-about .chapter-heading {
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  color: var(--clr-primary);
  margin: 0;
  letter-spacing: var(--ls-heading);
  line-height: 1.2;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.page-about .chapter-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--clr-accent1);
  border-radius: 2px;
}

.page-about .chapter-text {
  font-size: var(--size-body);
  color: var(--clr-neutral2);
  margin: 0;
  max-width: 38em;
  line-height: var(--lh-body);
}

.page-about .chapter-text a {
  color: var(--clr-accent1);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.page-about .chapter-text a:hover,
.page-about .chapter-text a:focus-visible {
  color: var(--clr-primary);
}

/* ===== 核心价值区 ===== */
.page-about .value-intro {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-sm);
}

.page-about .value-badge {
  width: 100px;
  height: auto;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  object-fit: contain;
  flex-shrink: 0;
  background: var(--clr-neutral1);
  padding: var(--spacing-xs);
  box-sizing: border-box;
}

.page-about .value-intro-text {
  font-size: var(--size-body);
  color: var(--clr-primary-light);
  margin: 0;
  flex: 1;
  font-style: italic;
}

.page-about .values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin: var(--spacing-md) 0;
}

.page-about .value-card {
  background: var(--clr-neutral1);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  clip-path: var(--card-clip);
  border-left: 4px solid var(--clr-accent1);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.page-about .value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.page-about .value-card-icon {
  color: var(--clr-accent1);
  width: 40px;
  height: 40px;
  margin-bottom: var(--spacing-xs);
}

.page-about .value-card-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .value-card-title {
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--clr-primary);
  margin: 0;
  letter-spacing: var(--ls-heading);
}

.page-about .value-card-desc {
  font-size: var(--size-body);
  color: var(--clr-neutral2);
  margin: 0;
  line-height: var(--lh-body);
}

.page-about .value-cta {
  margin-top: var(--spacing-sm);
}

.page-about .value-cta .btn {
  display: inline-block;
}

/* ===== 文化融合区 ===== */
.page-about .culture-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.page-about .culture-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.page-about .culture-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  box-shadow: var(--shadow-sm);
  background: var(--clr-primary-light);
  max-width: 100%;
}

.page-about .culture-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 400 / 300;
  object-fit: cover;
}

/* ===== 联系引导区 ===== */
.page-about .cta-section {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  color: var(--clr-secondary);
  padding: var(--spacing-2xl) var(--spacing-lg);
  margin-top: var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

.page-about .cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    55deg,
    transparent,
    transparent 40px,
    rgba(255, 255, 255, 0.02) 40px,
    rgba(255, 255, 255, 0.02) 41px
  );
  pointer-events: none;
}

.page-about .cta-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-about .cta-title {
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin: 0 0 var(--spacing-md);
  letter-spacing: var(--ls-heading);
  color: var(--clr-secondary);
}

.page-about .cta-desc {
  font-size: var(--size-body);
  color: rgba(255, 255, 255, 0.85);
  max-width: 30em;
  margin: 0 auto var(--spacing-xl);
  line-height: var(--lh-body);
}

.page-about .cta-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.page-about .cta-actions .btn {
  min-width: 160px;
  text-align: center;
}

/* ===== 通用按钮补充 ===== */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-heading);
  font-weight: var(--fw-heading);
  font-size: var(--size-body);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: default;
  line-height: 1.4;
}

.page-about .btn-primary {
  background: var(--clr-accent1);
  color: var(--clr-secondary);
  border-color: var(--clr-accent1);
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: transparent;
  color: var(--clr-accent1);
}

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

.page-about .btn-secondary:hover,
.page-about .btn-secondary:focus-visible {
  background: var(--clr-secondary);
  color: var(--clr-primary);
}

.page-about .btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
}

/* ===== 滚动显现交互 ===== */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 桌面端媒体查询（≥768px） ===== */
@media (min-width: 768px) {
  .page-about .breadcrumb {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }

  .page-about .hero {
    grid-template-columns: 1fr 1fr;
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-2xl);
    gap: var(--spacing-2xl);
  }

  .page-about .hero-text {
    order: 0;
  }

  .page-about .hero-visual {
    order: 1;
  }

  .page-about .hero-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
  }

  .page-about .chapter {
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) var(--spacing-xl);
  }

  .page-about .chapter-number {
    text-align: right;
    font-size: var(--chapter-num-size);
    line-height: 0.8;
    position: sticky;
    top: var(--spacing-xl);
  }

  .page-about .chapter-heading {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
  }

  .page-about .values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
  }

  .page-about .value-card {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .page-about .culture-content {
    grid-template-columns: 3fr 2fr;
    gap: var(--spacing-2xl);
  }

  .page-about .value-badge {
    width: 120px;
  }

  .page-about .skew-divider {
    padding: var(--spacing-xl) var(--spacing-xl);
  }

  .page-about .cta-section {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }

  .page-about .cta-title {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
  }
}

/* ===== 大屏桌面端（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-about .hero {
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-2xl);
  }

  .page-about .chapter {
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) var(--spacing-2xl);
  }

  .page-about .chapter-number {
    font-size: clamp(8rem, 12vw, 12rem);
  }

  .page-about .values-grid {
    gap: var(--spacing-xl);
  }

  .page-about .value-intro {
    flex-wrap: nowrap;
  }
}

/* ===== 确保窄屏不溢出 ===== */
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a {
  word-break: break-word;
}

/* ===== 打印优化 ===== */
@media print {
  .page-about .hero {
    min-height: auto;
  }

  .page-about .mountain-divider,
  .page-about .skew-divider {
    display: none;
  }

  .page-about .chapter {
    break-inside: avoid;
  }

  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}