/* =====================================================
   品牌概况页 · page-about 专属样式
   设计方向：展览画册式卷轴，错位色块、大留白、切角面板
   ===================================================== */
.page-about {
  --about-gold-soft: rgba(245, 197, 66, 0.35);
  --about-orange-soft: rgba(255, 107, 53, 0.28);
  --about-line: rgba(245, 240, 230, 0.14);
  background: var(--c-space);
  overflow-x: hidden;
}

/* ---------- 本页章节索引 ---------- */
.page-about .about-chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  align-items: center;
  padding: 0.9rem 0;
  margin-top: var(--space-md);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-chapter-link {
  color: var(--c-rock);
  font-size: var(--text-sm);
  text-decoration: none;
  padding: 0.38rem 0.85rem;
  border: 1px solid transparent;
  letter-spacing: 0.05em;
  transition: color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.page-about .about-chapter-link:hover {
  color: var(--c-gold);
}
.page-about .about-chapter-link.is-active {
  color: var(--c-gold);
  border-color: var(--about-gold-soft);
  background: rgba(245, 197, 66, 0.08);
}

/* ---------- Hero 区 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 300px at 85% -10%, var(--about-gold-soft), transparent 60%),
    radial-gradient(560px 260px at -5% 20%, var(--about-orange-soft), transparent 55%);
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}
.page-about .about-hero-kicker {
  font-family: var(--font-head);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 0.75rem;
}
.page-about .about-hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 7vw, 3.75rem);
  line-height: 1.1;
  color: var(--c-cream);
  margin: 0 0 1.2rem;
  letter-spacing: 0.02em;
}
.page-about .about-hero-title span {
  color: var(--c-gold);
}
.page-about .about-hero-lead {
  font-size: var(--text-lg);
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.85);
  max-width: 46rem;
  margin-bottom: var(--space-md);
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.page-about .about-figure-frame {
  position: relative;
  background: linear-gradient(135deg, var(--c-gold), var(--c-orange));
  padding: 3px;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}
.page-about .about-figure-frame img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 23px) 0, 100% 23px, 100% 100%, 23px 100%, 0 calc(100% - 23px));
}

/* ---------- 关键数据条 ---------- */
.page-about .about-stat-strip {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin-top: var(--space-lg);
}
.page-about .about-stat-item {
  position: relative;
  background: linear-gradient(160deg, var(--c-space-deep), var(--c-space));
  padding: var(--space-md);
}
.page-about .about-stat-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(var(--c-gold), var(--c-orange));
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-gold);
}
.page-about .about-stat-label {
  display: block;
  margin-top: 0.3rem;
  color: var(--c-rock);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

/* ---------- 我们是谁 ---------- */
.page-about .about-story {
  position: relative;
  background: var(--c-space-deep);
  padding-top: calc(var(--space-xl) + 28px);
  padding-bottom: calc(var(--space-xl) + 28px);
  clip-path: polygon(0 28px, 100% 0, 100% calc(100% - 28px), 0 100%);
}
.page-about .about-story-grid {
  display: grid;
  gap: var(--space-lg);
}
.page-about .about-story-copy p {
  color: rgba(245, 240, 230, 0.88);
  line-height: 1.8;
  margin: 0 0 1rem;
}
.page-about .about-story-copy p:last-child {
  margin-bottom: 0;
}
.page-about .about-story-note .panel-cut {
  background: linear-gradient(150deg, rgba(245, 197, 66, 0.08), rgba(255, 107, 53, 0.06));
}
.page-about .about-note-label {
  font-family: var(--font-head);
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
  color: var(--c-orange);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.page-about .about-note-text {
  color: var(--c-cream);
  line-height: 1.7;
  margin: 0;
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestone {
  padding-top: var(--space-xl);
}
.page-about .about-milestone-map {
  margin-bottom: var(--space-lg);
}
.page-about .about-map-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}
.page-about .about-timeline-wrap {
  padding-bottom: var(--space-md);
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-orange), rgba(245, 197, 66, 0.12));
}
.page-about .about-timeline-item {
  position: relative;
  padding-left: 44px;
  padding-bottom: var(--space-lg);
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-item::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 10px;
  width: 16px;
  height: 16px;
  background: var(--c-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 18px var(--about-gold-soft), 0 0 4px var(--c-gold);
}
.page-about .about-timeline-year {
  display: inline-block;
  font-family: var(--font-head);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--c-gold);
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.page-about .about-timeline-card {
  padding: var(--space-md);
  background: linear-gradient(150deg, rgba(19, 42, 82, 0.92), rgba(11, 30, 63, 0.72));
  border-left: 3px solid var(--c-orange);
}
.page-about .about-timeline-title {
  font-size: var(--text-lg);
  color: var(--c-cream);
  margin: 0 0 0.5rem;
}
.page-about .about-timeline-card p {
  color: var(--c-rock);
  line-height: 1.65;
  margin: 0 0 0.75rem;
}

/* ---------- 数据能力 ---------- */
.page-about .about-capability {
  padding-top: var(--space-xl);
  background: linear-gradient(180deg, transparent 0%, rgba(19, 42, 82, 0.3) 20%, rgba(19, 42, 82, 0.3) 80%, transparent 100%);
}
.page-about .about-capability-grid {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}
.page-about .about-chart-frame {
  background: linear-gradient(150deg, var(--c-space-deep), rgba(11, 30, 63, 0.8));
  padding: var(--space-md);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}
.page-about .about-chart-img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.page-about .about-data-cell {
  padding: var(--space-sm);
  background: rgba(19, 42, 82, 0.7);
  border-left: 2px solid var(--c-gold);
  transition: transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.page-about .about-data-cell:hover,
.page-about .about-data-cell:focus-visible {
  transform: translateX(6px);
  background: rgba(19, 42, 82, 0.95);
  box-shadow: 0 0 22px var(--about-gold-soft);
}
.page-about .about-data-icon {
  color: var(--c-orange);
  font-size: var(--text-sm);
  margin-right: 0.5rem;
}
.page-about .about-data-num {
  font-family: var(--font-head);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--c-cream);
}
.page-about .about-data-desc {
  display: block;
  color: var(--c-rock);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  margin-top: 0.3rem;
}
.page-about .about-capability-list {
  display: grid;
  gap: var(--space-md);
}
.page-about .about-capability-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: linear-gradient(120deg, rgba(19, 42, 82, 0.75), rgba(11, 30, 63, 0.4));
  border-left: 3px solid var(--c-orange);
}
.page-about .about-cap-icon {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--c-orange);
  line-height: 1.4;
}
.page-about .about-capability-item h3 {
  font-size: var(--text-lg);
  color: var(--c-cream);
  margin: 0 0 0.35rem;
}
.page-about .about-capability-item p {
  color: var(--c-rock);
  line-height: 1.65;
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: var(--space-md);
}
.page-about .about-team-card {
  padding: var(--space-lg);
}
.page-about .about-team-num {
  font-family: var(--font-head);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
  margin-bottom: var(--space-sm);
}
.page-about .about-team-card h3 {
  font-size: var(--text-xl);
  color: var(--c-cream);
  margin: 0 0 0.5rem;
}
.page-about .about-team-card p {
  color: var(--c-rock);
  line-height: 1.7;
  margin: 0;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honor {
  background: var(--c-space-deep);
  clip-path: polygon(0 28px, 100% 0, 100% 100%, 0 calc(100% - 28px));
  padding-top: calc(var(--space-xl) + 28px);
  padding-bottom: calc(var(--space-xl) + 28px);
}
.page-about .about-honor-grid {
  display: grid;
  gap: var(--space-xl);
}
.page-about .about-honor-list {
  display: grid;
  gap: 0;
}
.page-about .about-honor-item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-honor-item:last-child {
  border-bottom: 0;
}
.page-about .about-honor-icon {
  color: var(--c-gold);
  font-size: var(--text-lg);
  line-height: 1.6;
}
.page-about .about-honor-item strong {
  display: block;
  color: var(--c-cream);
  margin-bottom: 0.35rem;
  font-family: var(--font-head);
  font-size: var(--text-md);
  letter-spacing: 0.04em;
}
.page-about .about-honor-item p {
  color: var(--c-rock);
  line-height: 1.7;
  margin: 0;
}
.page-about .about-honor-cta {
  align-self: start;
  padding: var(--space-lg);
  background: linear-gradient(140deg, var(--c-space-deep), var(--c-space));
}
.page-about .about-cta-kicker {
  font-family: var(--font-head);
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-orange);
  margin-bottom: 0.75rem;
}
.page-about .about-honor-cta h3 {
  font-family: var(--font-head);
  font-size: var(--text-xl);
  color: var(--c-cream);
  margin: 0 0 0.75rem;
}
.page-about .about-honor-cta p {
  color: var(--c-rock);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-stat-strip {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-data-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-xl);
  }
  .page-about .about-hero-figure {
    margin-top: var(--space-lg);
  }
  .page-about .about-story-grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-xl);
  }
  .page-about .about-story-note {
    margin-top: var(--space-lg);
  }
  .page-about .about-capability-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
  .page-about .about-honor-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-xl);
  }
}

/* ---------- 宽屏时间线 ---------- */
@media (min-width: 960px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-md);
    padding-top: var(--space-lg);
    padding-bottom: 56px;
  }
  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 16px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--c-gold), var(--c-orange), rgba(245, 197, 66, 0.2));
  }
  .page-about .about-timeline-item {
    padding-left: 0;
    padding-bottom: 0;
  }
  .page-about .about-timeline-item::before {
    left: 0;
    top: 8px;
  }
  .page-about .about-timeline-item:nth-child(even) {
    margin-top: 52px;
  }
}