/* ========================================
   页面作用域：.page-about
   品牌故事页 · 非对称杂志版式 · 纸张叠层材质
   ======================================== */
.page-about {
  --about-paper: #F5F0E8;
  --about-paper-dark: #E8E0D0;
  --about-ink: #1A1A1A;
  --about-accent: #FF6B35;
  --about-primary: #1A2A3A;
  --about-border: #C0B8A8;
  --about-tag-bg: #1A2A3A;
  --about-tag-fg: #F5F0E8;
  --about-card-shadow: 0 4px 20px rgba(26,42,58,0.08);
  --about-timeline-line: #C0B8A8;

  /* 排版缩放 */
  --about-h1: clamp(2.8rem, 6vw, 5.2rem);
  --about-h2: clamp(1.8rem, 3.5vw, 3rem);
  --about-h3: clamp(1.2rem, 2vw, 1.6rem);
  --about-body: clamp(0.95rem, 1.2vw, 1.1rem);
  --about-small: clamp(0.8rem, 0.9vw, 0.9rem);

  background-color: var(--about-paper);
  color: var(--about-ink);
  font-family: var(--font-body, 'Inter', Roboto, sans-serif);
  line-height: 1.6;
  padding-bottom: 2rem;
  position: relative;
  z-index: 1;
}

/* ---- 面包屑 ---- */
.page-about .breadcrumbs {
  padding: 1.2rem 2rem 0;
  font-size: var(--about-small);
  color: var(--text-secondary, #4A4A4A);
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}
.page-about .breadcrumbs a {
  color: var(--about-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.page-about .breadcrumbs a:hover {
  border-color: var(--about-accent);
}
.page-about .breadcrumbs .separator {
  margin: 0 0.4rem;
  color: var(--about-border);
}
.page-about .breadcrumbs .current {
  font-weight: 600;
  color: var(--about-ink);
}

/* ---- 首屏：非对称标题区 ---- */
.page-about .about-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: var(--max-width, 1280px);
  margin: 1rem auto 2rem;
  padding: 0 2rem;
  gap: 1.5rem;
}
.page-about .about-hero__image-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1200 / 800;
  overflow: hidden;
  border: 2px solid var(--about-border);
  box-shadow: 8px 8px 0 rgba(26,42,58,0.08);
  background: var(--about-paper-dark);
}
.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .about-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,42,58,0.25) 0%, transparent 60%);
  pointer-events: none;
}
.page-about .about-hero__text {
  position: relative;
  padding: 1rem 0;
}
.page-about .about-hero__title {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: var(--about-h1);
  font-weight: 700;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 0.3rem;
  color: var(--about-ink);
}
.page-about .about-hero__annotation {
  font-size: var(--about-small);
  color: var(--about-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
  margin: 0 0 0.8rem;
  position: relative;
  display: inline-block;
}
.page-about .about-hero__annotation::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background: var(--about-accent);
  margin-top: 2px;
}
.page-about .about-hero__intro {
  font-size: var(--about-body);
  color: var(--text-secondary, #4A4A4A);
  max-width: 36em;
  margin: 0;
  line-height: 1.5;
}
.page-about .about-hero__label {
  position: absolute;
  top: 0.5rem;
  right: 2rem;
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: clamp(0.9rem, 1.4vw, 1.2rem);
  color: var(--about-accent);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.2em;
  opacity: 0.7;
  pointer-events: none;
}

/* ---- 通用section标签与标题 ---- */
.page-about .section-label {
  display: block;
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: clamp(1.2rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--about-accent);
  line-height: 1;
  margin-bottom: 0.3rem;
  letter-spacing: 0.05em;
}
.page-about .section-heading {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: var(--about-h2);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 0.4rem;
  color: var(--about-ink);
  text-transform: uppercase;
}
.page-about .section-note {
  font-size: var(--about-small);
  color: var(--text-secondary, #4A4A4A);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 1rem;
  font-weight: 400;
}

/* ---- 我们的使命 ---- */
.page-about .about-mission {
  position: relative;
  max-width: var(--max-width, 1280px);
  margin: 2rem auto;
  padding: 2rem 2rem 3rem;
  background: var(--about-paper-dark);
  border: 1px solid var(--about-border);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6);
}
.page-about .about-mission__inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .about-mission__left {
  flex: 0 0 auto;
}
.page-about .about-mission__right {
  flex: 1;
}
.page-about .about-mission__text {
  font-size: var(--about-body);
  line-height: 1.7;
  margin: 0 0 1.5rem;
  max-width: 48em;
  color: var(--text-primary, #1A1A1A);
}
.page-about .about-mission__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  padding-top: 0.5rem;
  border-top: 2px solid var(--about-accent);
}
.page-about .stat-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.page-about .stat-number {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--about-primary);
}
.page-about .stat-unit {
  font-size: var(--about-small);
  color: var(--text-secondary, #4A4A4A);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.1rem;
}
.page-about .stat-desc {
  font-size: var(--about-small);
  color: var(--about-accent);
  font-weight: 500;
  margin-top: 0.2rem;
}

/* ---- 品牌故事 · 时间轴 ---- */
.page-about .about-story {
  max-width: var(--max-width, 1280px);
  margin: 3rem auto;
  padding: 0 2rem;
}
.page-about .about-story__header {
  margin-bottom: 2.5rem;
  border-left: 4px solid var(--about-accent);
  padding-left: 1.2rem;
}
.page-about .about-story__header .section-label {
  margin-bottom: 0.2rem;
}
.page-about .about-story__header .section-heading {
  margin-bottom: 0.2rem;
}
.page-about .about-story__timeline {
  position: relative;
  padding-left: 2.2rem;
}
.page-about .about-story__timeline::before {
  content: '';
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0.6rem;
  width: 2px;
  background: var(--about-timeline-line);
}
.page-about .timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 1.5rem;
}
.page-about .timeline-item:last-child {
  margin-bottom: 0;
}
.page-about .timeline-item__marker {
  position: absolute;
  left: -2.2rem;
  top: 0.6rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-accent);
  border: 3px solid var(--about-paper);
  box-shadow: 0 0 0 2px var(--about-accent);
  z-index: 2;
}
.page-about .timeline-item__card {
  background: white;
  border: 1px solid var(--about-border);
  padding: 1.2rem 1.5rem 1.2rem 1.2rem;
  box-shadow: var(--about-card-shadow);
  position: relative;
  transition: box-shadow 0.25s;
}
.page-about .timeline-item__card:hover {
  box-shadow: 0 6px 28px rgba(26,42,58,0.12);
}
.page-about .timeline-item__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.6rem;
  background: var(--about-tag-bg);
  color: var(--about-tag-fg);
  margin-bottom: 0.5rem;
}
.page-about .timeline-item__title {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: var(--about-h3);
  font-weight: 700;
  margin: 0 0 0.4rem;
  line-height: 1.2;
  color: var(--about-ink);
}
.page-about .timeline-item__desc {
  font-size: var(--about-body);
  color: var(--text-secondary, #4A4A4A);
  margin: 0 0 0.6rem;
  line-height: 1.6;
}
.page-about .timeline-item__expand {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--about-small);
  font-weight: 600;
  color: var(--about-accent);
  cursor: pointer;
  user-select: none;
  transition: color 0.2s;
}
.page-about .timeline-item__expand:hover {
  color: var(--about-primary);
}
.page-about .expand-icon {
  display: inline-block;
  font-size: 1.2em;
  line-height: 1;
  transition: transform 0.25s;
}
.page-about .timeline-item[data-open] .expand-icon {
  transform: rotate(45deg);
}
.page-about .timeline-item__detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 0.5rem 0 0;
  font-size: var(--about-body);
  color: var(--text-primary, #1A1A1A);
  line-height: 1.6;
}
.page-about .timeline-item[data-open] .timeline-item__detail {
  max-height: 20rem;
  padding-top: 0.8rem;
}
.page-about .timeline-item__detail p {
  margin: 0;
}
.page-about .about-story__footnote {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--about-border);
  font-size: var(--about-small);
  color: var(--text-secondary, #4A4A4A);
  max-width: 42em;
  font-style: italic;
}
.page-about .about-story__footnote p {
  margin: 0;
}

/* ---- 核心价值 ---- */
.page-about .about-values {
  max-width: var(--max-width, 1280px);
  margin: 3rem auto;
  padding: 0 2rem;
}
.page-about .about-values__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .about-values__left {
  flex: 0 0 auto;
}
.page-about .about-values__left .section-note {
  font-size: var(--about-small);
  color: var(--about-accent);
  font-weight: 600;
}
.page-about .about-values__text {
  font-size: var(--about-body);
  color: var(--text-secondary, #4A4A4A);
  max-width: 36em;
  line-height: 1.7;
  margin: 0.8rem 0 0;
}
.page-about .about-values__right {
  flex: 1;
}
.page-about .values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
.page-about .value-card {
  background: white;
  border: 1px solid var(--about-border);
  padding: 1.4rem 1.2rem;
  box-shadow: var(--about-card-shadow);
  position: relative;
  transition: transform 0.2s, box-shadow 0.25s;
  cursor: default;
}
.page-about .value-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(26,42,58,0.1);
}
.page-about .value-card__number {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 700;
  color: var(--about-accent);
  line-height: 1;
  margin-bottom: 0.3rem;
  opacity: 0.6;
}
.page-about .value-card__title {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: var(--about-h3);
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--about-ink);
  line-height: 1.2;
}
.page-about .value-card__desc {
  font-size: var(--about-body);
  color: var(--text-secondary, #4A4A4A);
  margin: 0 0 0.8rem;
  line-height: 1.6;
}
.page-about .value-card__tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.7rem;
  background: var(--about-paper-dark);
  color: var(--about-primary);
  border: 1px solid var(--about-border);
  transition: background 0.2s, color 0.2s;
  cursor: help;
}
.page-about .value-card__tag:hover {
  background: var(--about-primary);
  color: var(--about-tag-fg);
}
.page-about .about-values__image {
  margin-top: 2rem;
  width: 100%;
  max-width: 700px;
  border: 2px solid var(--about-border);
  box-shadow: -6px 6px 0 rgba(26,42,58,0.06);
  overflow: hidden;
}
.page-about .about-values__image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- 关联链接区 ---- */
.page-about .about-links {
  max-width: var(--max-width, 1280px);
  margin: 3rem auto 1.5rem;
  padding: 0 2rem;
}
.page-about .about-links__inner {
  border-top: 3px solid var(--about-primary);
  padding-top: 1.5rem;
}
.page-about .about-links__inner .section-heading {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 1.2rem;
}
.page-about .about-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .link-card {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.2rem;
  background: white;
  border: 1px solid var(--about-border);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s, border-color 0.2s;
  box-shadow: var(--about-card-shadow);
}
.page-about .link-card:hover {
  background: var(--about-paper-dark);
  border-color: var(--about-accent);
}
.page-about .link-card__icon {
  font-size: 1.4rem;
  color: var(--about-accent);
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.page-about .link-card__title {
  font-family: var(--font-headings, 'Oswald', Impact, sans-serif);
  font-size: var(--about-h3);
  font-weight: 700;
  color: var(--about-ink);
  line-height: 1.2;
}
.page-about .link-card__desc {
  font-size: var(--about-small);
  color: var(--text-secondary, #4A4A4A);
  margin-top: 0.2rem;
}

/* ---- 底部设备图 ---- */
.page-about .about-device {
  max-width: var(--max-width, 1280px);
  margin: 1.5rem auto 0;
  padding: 0 2rem;
}
.page-about .about-device img {
  width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--about-border);
  box-shadow: 8px 8px 0 rgba(26,42,58,0.06);
}

/* ---- 响应式 ---- */
@media (min-width: 768px) {
  .page-about .about-hero {
    flex-direction: row;
    align-items: flex-end;
    gap: 2rem;
  }
  .page-about .about-hero__image-frame {
    flex: 0 0 60%;
    aspect-ratio: auto;
    height: auto;
    min-height: 320px;
  }
  .page-about .about-hero__text {
    flex: 1;
    padding: 0 0 0.5rem;
  }
  .page-about .about-hero__label {
    right: 1rem;
    top: 0.8rem;
  }

  .page-about .about-mission__inner {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .about-mission__left {
    width: 28%;
    min-width: 160px;
    padding-right: 1.5rem;
    border-right: 2px solid var(--about-accent);
  }
  .page-about .about-mission__right {
    padding-left: 1.5rem;
  }

  .page-about .about-values__inner {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .about-values__left {
    width: 32%;
    min-width: 180px;
    padding-right: 2rem;
    position: sticky;
    top: 2rem;
  }
  .page-about .values-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .about-story__timeline {
    padding-left: 3rem;
  }
  .page-about .about-story__timeline::before {
    left: 0.8rem;
  }
  .page-about .timeline-item {
    padding-left: 2rem;
  }
  .page-about .timeline-item__marker {
    left: -3rem;
    width: 18px;
    height: 18px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__image-frame {
    flex: 0 0 55%;
    min-height: 380px;
  }
  .page-about .about-values__left {
    width: 28%;
  }
  .page-about .value-card {
    padding: 1.8rem 1.5rem;
  }
}

/* ---- 纸张纹理模拟（全局背景叠层） ---- */
.page-about::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(192,184,168,0.04) 2px,
      rgba(192,184,168,0.04) 4px
    );
}
.page-about > * {
  position: relative;
  z-index: 1;
}
</<PAGE_CSS>