/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --about-rail-w: 210px;
  --about-divider: rgba(184, 134, 11, 0.35);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ---------- 面包屑补充 ---------- */
.page-about .breadcrumb {
  margin-bottom: var(--space-lg);
}
.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--accent-highlight);
}
.page-about .breadcrumb-current {
  color: var(--accent-gold);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--space-lg) 0 var(--space-xl);
  background:
    radial-gradient(ellipse at 85% 18%, rgba(212, 175, 55, 0.09), transparent 55%),
    linear-gradient(180deg, rgba(30, 58, 95, 0.4), transparent 62%);
}
.page-about .about-hero::after {
  content: '';
  display: block;
  height: 1px;
  max-width: var(--container-max);
  margin: var(--space-xl) auto 0;
  background: linear-gradient(90deg, transparent, var(--line-gold) 30%, var(--line-gold) 70%, transparent);
}
.page-about .about-hero-grid {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
  margin-top: var(--space-lg);
}
.page-about .about-eyebrow {
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: var(--space-md);
}
.page-about .about-hero-copy h1 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.18;
  font-weight: 900;
  margin: 0 0 var(--space-md);
  color: var(--text-primary);
}
.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 38rem;
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}
.page-about .about-hero-visual {
  justify-self: center;
}
.page-about .about-hero-visual img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

/* ---------- 几何装饰带 ---------- */
.page-about .about-geo-pattern {
  display: flex;
  justify-content: center;
  gap: 0.65rem;
  padding: var(--space-lg) 1.5rem;
}
.page-about .about-geo-pattern span {
  width: 0.55rem;
  height: 0.55rem;
  border: 1px solid var(--accent-gold);
  transform: rotate(45deg);
}
.page-about .about-geo-pattern span:nth-child(odd) {
  background: var(--accent-gold);
}

/* ---------- 叙事主体 ---------- */
.page-about .about-story-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-xl) 1.5rem var(--space-2xl);
}
.page-about .about-story-body {
  min-width: 0;
  max-width: 52rem;
}

/* ---------- 左侧品牌纹理 ---------- */
.page-about .about-rail {
  display: none;
}
.page-about .about-rail-inner {
  position: relative;
}
.page-about .about-rail-inner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9rem;
  height: 9rem;
  border: 1px solid rgba(212, 175, 55, 0.14);
  transform: translate(-50%, -50%) rotate(45deg);
  pointer-events: none;
}
.page-about .about-rail-inner::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 13rem;
  height: 13rem;
  border: 1px solid rgba(184, 134, 11, 0.1);
  transform: translate(-50%, -50%) rotate(45deg);
  pointer-events: none;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: var(--space-xl) 0;
  scroll-margin-top: 6rem;
}
.page-about .about-section + .about-section {
  border-top: 1px solid var(--about-divider);
  margin-top: var(--space-xl);
}
.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.page-about .about-section-no {
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
  border: 1px solid var(--line-gold);
  padding: 0.35em 0.6em;
  white-space: nowrap;
}
.page-about .about-section-kicker {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent-highlight);
  margin: 0 0 0.35rem;
}
.page-about .about-section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1.3;
  margin: 0;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 0.4em;
}
.page-about .about-section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2.6rem;
  height: 3px;
  background: var(--accent-gold);
}
.page-about .about-section-intro {
  font-family: var(--font-body);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 40rem;
  margin: 0 0 var(--space-lg);
}

/* ---------- 品牌起源 ---------- */
.page-about .about-origin-grid {
  display: grid;
  gap: var(--space-xl);
}
.page-about .about-origin-copy p {
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin: 0 0 var(--space-md);
}
.page-about .about-origin-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  border-top: 1px solid var(--about-divider);
  padding-top: var(--space-md);
}
.page-about .about-origin-stats .stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.page-about .about-origin-stats .stat-number {
  font-family: var(--font-data);
  font-size: 1.35rem;
  color: var(--accent-gold);
}
.page-about .about-origin-stats .stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}
.page-about .about-origin-art img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
}

/* ---------- 发展里程碑 · 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: var(--space-md) 0 var(--space-lg);
}
.page-about .about-timeline-track {
  position: absolute;
  left: 0.55rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-gold), var(--line-gold) 60%, transparent);
}
.page-about .about-timeline-item {
  position: relative;
  padding-left: 2rem;
  margin-bottom: var(--space-md);
}
.page-about .about-timeline-node {
  position: absolute;
  left: 0.2rem;
  top: 1.35rem;
  width: 0.9rem;
  height: 0.9rem;
  background: var(--bg-primary);
  border: 2px solid var(--accent-gold);
  transform: rotate(45deg);
  z-index: 2;
}
.page-about .about-timeline-card {
  background: var(--bg-card);
  border-left: 3px solid var(--accent-gold);
  border-radius: var(--radius);
}
.page-about .about-timeline-trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.9rem;
  width: 100%;
  padding: 1.1rem 1.2rem;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--text-primary);
  text-align: left;
  font-family: var(--font-heading);
}
.page-about .about-timeline-trigger::after {
  content: '+';
  font-family: var(--font-data);
  color: var(--accent-gold);
  font-size: 1.1rem;
  line-height: 1;
  transition: transform 0.2s ease;
}
.page-about .about-timeline-trigger[aria-expanded="true"]::after {
  transform: rotate(45deg);
}
.page-about .about-timeline-trigger:hover,
.page-about .about-timeline-trigger:focus-visible {
  background: rgba(212, 175, 55, 0.08);
  outline: 2px solid var(--accent-gold);
  outline-offset: -2px;
}
.page-about .about-version {
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--accent-highlight);
  font-weight: 700;
}
.page-about .about-version-desc {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 700;
  flex: 1;
  min-width: 12rem;
}
.page-about .about-timeline .panel-content {
  padding: 0 1.25rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
}
.page-about .about-timeline .panel-content p {
  margin: 0;
}

/* ---------- 发展里程碑 · 图表 ---------- */
.page-about .about-chart {
  margin-top: var(--space-xl);
}
.page-about .about-chart-visual img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
}
.page-about .about-chart-caption {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-top: var(--space-sm);
  text-align: center;
}

/* ---------- 核心理念 ---------- */
.page-about .about-values-grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.page-about .about-value-card {
  background: var(--bg-card);
  border-top: 3px solid var(--accent-gold);
  padding: var(--space-lg) var(--space-md);
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-value-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
}
.page-about .about-value-num {
  font-family: var(--font-data);
  color: var(--accent-gold);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  display: inline-block;
  margin-bottom: var(--space-sm);
}
.page-about .about-value-card h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0 0 var(--space-sm);
  color: var(--text-primary);
}
.page-about .about-value-card p {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- 团队与资质 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: var(--space-xl);
}
.page-about .about-team-copy p {
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin: 0 0 var(--space-md);
}
.page-about .about-team-copy a,
.page-about .about-team-note a {
  color: var(--accent-highlight);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}
.page-about .about-team-copy a:hover,
.page-about .about-team-note a:hover {
  color: var(--accent-gold);
}
.page-about .about-cert-list {
  list-style: none;
  margin: var(--space-md) 0 var(--space-lg);
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}
.page-about .about-cert-list li {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  background: rgba(30, 58, 95, 0.45);
  padding: var(--space-sm) var(--space-md);
  border-left: 2px solid var(--accent-wine);
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
}
.page-about .about-cert-check {
  color: var(--accent-gold);
  font-weight: 700;
}
.page-about .about-team-quote {
  background: linear-gradient(140deg, rgba(212, 175, 55, 0.14), rgba(140, 29, 24, 0.22));
  border-right: 3px solid var(--accent-wine);
  padding: var(--space-lg) var(--space-md);
  align-self: start;
}
.page-about .about-team-quote blockquote {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}
.page-about .about-quote-attr {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
}
.page-about .about-team-note {
  font-size: 0.9rem;
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--accent-highlight);
  outline-offset: 2px;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-2xl);
  }
  .page-about .about-origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-xl) var(--space-2xl);
    align-items: start;
  }
  .page-about .about-values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-team-grid {
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-xl);
    align-items: start;
  }
}

/* ---------- 大屏分栏叙事 ---------- */
@media (min-width: 1024px) {
  .page-about .about-story-shell {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--space-xl);
    padding-top: var(--space-2xl);
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 8rem;
    align-self: start;
    height: 70vh;
  }
  .page-about .about-rail-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
  }
  .page-about .about-rail-index {
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 0.72rem;
    letter-spacing: 0.3em;
    color: var(--text-secondary);
  }
  .page-about .about-rail-line {
    flex: 1;
    width: 1px;
    margin: var(--space-md) 0;
    background: linear-gradient(to bottom, var(--line-gold), rgba(212, 175, 55, 0.1));
  }
  .page-about .about-rail-glyph {
    width: 2.6rem;
    height: 2.6rem;
    border: 1px solid var(--accent-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 900;
    color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.08);
  }
}

/* ---------- 减弱动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-value-card {
    transition: none;
  }
  .page-about .about-timeline-trigger::after {
    transition: none;
  }
}