.page-about {
  --timeline-accent: var(--color-primary);
  --timeline-gold: var(--color-gold);
  background: var(--color-bg);
  color: var(--color-gray);
  font-family: var(--font-body);
  overflow-x: hidden;
}
.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}
.page-about a {
  color: var(--color-blue);
}
.page-about a:hover {
  color: var(--color-white);
}
.page-about .breadcrumb {
  margin-bottom: 16px;
}
.page-about .section {
  padding: 64px 0;
}
.page-about .container-narrow,
.page-about .page-container {
  margin-inline: auto;
  padding-inline: 20px;
}
.page-about .page-container {
  max-width: var(--container-width);
}
.page-about .container-narrow {
  max-width: var(--container-narrow);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  background: var(--color-bg);
  padding: 36px 0 64px;
  border-bottom: var(--border-width) solid var(--color-primary);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: -12%;
  width: 60%;
  height: 100%;
  background: linear-gradient(115deg, rgba(255, 59, 48, 0.18) 0%, rgba(255, 59, 48, 0) 70%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}
.page-about .about-hero__copy {
  max-width: 680px;
}
.page-about .about-hero__title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 2.9rem;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin: 16px 0 4px;
  transform: skewX(var(--skew));
}
.page-about .about-hero__subline {
  font-family: var(--font-subtitle);
  font-weight: 300;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  margin: 0 0 16px;
}
.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-silver);
  margin: 0 0 24px;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero__actions .btn {
  margin-right: 4px;
}
.page-about .about-hero__path {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--color-bg-elevated);
}
.page-about .about-hero__path-label {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--color-silver);
  text-transform: uppercase;
  margin-right: 4px;
}
.page-about .about-hero__path a {
  font-size: 0.875rem;
  color: var(--color-silver);
  text-decoration: none;
  border: 1px solid var(--color-bg-elevated);
  padding: 7px 14px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-hero__path a:hover {
  color: var(--color-white);
  border-color: var(--color-primary);
  background: rgba(255, 59, 48, 0.15);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-content: start;
}
.page-about .about-stat {
  position: relative;
  background: var(--color-bg-card);
  border: 2px solid var(--color-bg-elevated);
  padding: 22px 16px 18px;
  box-shadow: var(--shadow-strong);
}
.page-about .about-stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-silver);
}
.page-about .about-stat--gold::before {
  background: var(--color-gold);
}
.page-about .about-stat__num {
  display: block;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1.1;
  color: var(--color-gold);
}
.page-about .about-stat--gold .about-stat__num {
  color: var(--color-primary);
}
.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--color-silver);
  text-transform: uppercase;
}

/* ============ 品牌故事 ============ */
.page-about .about-story {
  background: var(--color-bg);
}
.page-about .about-story__layout {
  display: grid;
  gap: 28px;
  margin-top: 36px;
}
.page-about .about-story__text p {
  line-height: 1.8;
  color: var(--color-gray);
  margin: 0 0 16px;
}
.page-about .about-story__quote {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: var(--border-width) solid var(--color-primary);
  background: var(--color-bg-card);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--color-white);
  transform: skewX(var(--skew));
}
.page-about .about-story__media {
  position: relative;
}
.page-about .about-story__media .image-frame {
  width: 100%;
  height: auto;
}

/* ============ 发展里程碑 ============ */
.page-about .about-journey {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-card) 100%);
  padding: 64px 0;
  border-top: 1px solid var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-bg-elevated);
}
.page-about .about-journey .section-title--center {
  margin-bottom: 32px;
}
.page-about .about-timeline {
  margin-top: 40px;
  position: relative;
}
.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding-bottom: 36px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 12px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary) 0%, var(--color-gold) 100%);
}
.page-about .about-timeline__item:last-child::before {
  bottom: auto;
  height: 32px;
}
.page-about .about-timeline__marker {
  width: 56px;
  position: relative;
  z-index: 1;
  padding-top: 18px;
}
.page-about .about-timeline__dot {
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-gold);
  border: var(--border-width) solid var(--color-bg-card);
  box-shadow: 0 0 0 2px var(--color-gold), 0 8px 24px rgba(0, 0, 0, 0.55);
}
.page-about .about-timeline__card {
  position: relative;
  background: var(--color-bg-card);
  border: 2px solid var(--color-bg-elevated);
  padding: 22px 20px 18px;
  box-shadow: var(--shadow-strong);
}
.page-about .about-timeline__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
}
.page-about .about-timeline__badge {
  display: inline-block;
  background: var(--color-bg);
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 3px 12px;
  transform: skewX(var(--skew));
  margin-bottom: 10px;
}
.page-about .about-timeline__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--color-white);
  margin: 0 0 8px;
}
.page-about .about-timeline__summary {
  color: var(--color-silver);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin: 0;
}
.page-about .about-timeline__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 16px;
  padding: 12px 0 0;
  background: transparent;
  border: none;
  border-top: 1px solid var(--color-bg-elevated);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gold);
  cursor: pointer;
  text-align: left;
}
.page-about .about-timeline__trigger:hover {
  color: var(--color-white);
}
.page-about .about-timeline__detail {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary);
  color: var(--color-gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}
.page-about .about-timeline__detail p {
  margin: 0;
}
.page-about .about-journey__more {
  text-align: center;
  margin-top: 24px;
}

/* ============ 团队与组织 ============ */
.page-about .about-team {
  background: var(--color-bg);
}
.page-about .about-team__layout {
  display: grid;
  gap: 36px;
  margin-top: 36px;
}
.page-about .about-team__media {
  position: relative;
  align-self: start;
}
.page-about .about-team__media::after {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 100%;
  height: 100%;
  border: var(--border-width) solid var(--color-blue);
  pointer-events: none;
}
.page-about .about-team__media .image-frame {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
}
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
}
.page-about .about-team-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-bg-elevated);
  padding: 22px 20px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-team-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0 var(--color-primary);
}
.page-about .about-team-card--dev {
  border-top: 4px solid var(--color-primary);
}
.page-about .about-team-card--data {
  border-top: 4px solid var(--color-gold);
}
.page-about .about-team-card--ux {
  border-top: 4px solid var(--color-blue);
}
.page-about .about-team-card--cs {
  border-top: 4px solid var(--color-purple);
}
.page-about .about-team-card__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}
.page-about .about-team-card__count {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold);
  white-space: nowrap;
}
.page-about .about-team-card__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-white);
  margin: 0;
}
.page-about .about-team-card__text {
  color: var(--color-silver);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 0;
}

/* ============ 技术实力 ============ */
.page-about .about-tech {
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-card) 55%, var(--color-bg) 100%);
  padding: 64px 0;
  border-top: 1px solid var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-bg-elevated);
}
.page-about .about-tech__layers {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}
.page-about .about-layer {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-silver);
  padding: 20px;
}
.page-about .about-layer::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -16px;
  width: 2px;
  height: 16px;
  background: var(--color-blue);
  transform: translateX(-50%);
  display: none;
}
.page-about .about-layer:not(:last-child)::after {
  display: block;
}
.page-about .about-layer__index {
  display: block;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-blue);
  opacity: 0.85;
  margin-bottom: 10px;
}
.page-about .about-layer__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-white);
  margin: 0 0 8px;
}
.page-about .about-layer__text {
  color: var(--color-silver);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 0;
}
.page-about .about-tech__metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 36px;
}
.page-about .about-tech-metric {
  background: var(--color-bg);
  border: 2px solid var(--color-bg-elevated);
  padding: 18px 14px;
  text-align: center;
  box-shadow: inset 0 -3px 0 var(--color-bg-elevated);
}
.page-about .about-tech-metric__num {
  display: block;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.4rem;
  line-height: 1.15;
  color: var(--color-gold);
}
.page-about .about-tech-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--color-silver);
  text-transform: uppercase;
}
.page-about .about-tech__features {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}
.page-about .about-tech__features .card {
  margin: 0;
}

/* ============ 荣誉与合作 ============ */
.page-about .about-honor {
  background: var(--color-bg);
}
.page-about .about-honor__layout {
  display: grid;
  gap: 36px;
  margin-top: 36px;
}
.page-about .about-honor__media {
  position: relative;
  align-self: start;
  justify-self: center;
}
.page-about .about-honor__media .image-frame {
  width: 100%;
  height: auto;
}
.page-about .about-honor-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 18px;
  background: var(--color-bg-card);
  border: 2px solid var(--color-bg-elevated);
  margin-bottom: 16px;
  box-shadow: var(--shadow-strong);
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.page-about .about-honor-item:hover {
  border-color: var(--color-gold);
  transform: translateY(-3px);
}
.page-about .about-honor-item:last-child {
  margin-bottom: 0;
}
.page-about .about-honor-item__icon {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border: 2px solid var(--color-gold);
  color: var(--color-gold);
  background: var(--color-bg);
}
.page-about .about-honor-item__icon--red {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.page-about .about-honor-item__icon--blue {
  border-color: var(--color-blue);
  color: var(--color-blue);
}
.page-about .about-honor-item__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-white);
  margin: 0 0 8px;
}
.page-about .about-honor-item__text {
  color: var(--color-silver);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 0;
}

/* ============ 底部行动区 ============ */
.page-about .about-cta {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-dark) 70%, var(--color-bg) 170%);
  padding: 64px 0;
  text-align: center;
  border-top: var(--border-width) solid var(--color-gold);
}
.page-about .about-cta__title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-white);
  margin: 0 0 16px;
}
.page-about .about-cta__text {
  max-width: 560px;
  margin: 0 auto 28px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  line-height: 1.7;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.page-about .about-cta__actions .btn--gold {
  border: 2px solid var(--color-gold);
  color: var(--color-bg);
  background: var(--color-gold);
}
.page-about .about-cta__actions .btn--ghost {
  border-color: rgba(255, 255, 255, 0.85);
  color: var(--color-white);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-tech__layers {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .about-layer__text {
    font-size: 0.9375rem;
  }
}

@media (min-width: 820px) {
  .page-about .about-hero {
    padding: 48px 0 72px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 44px;
    align-items: center;
  }
  .page-about .about-hero__stats {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-story__layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: 40px;
    align-items: center;
  }
  .page-about .about-team__layout {
    grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.35fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .about-honor__layout {
    grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr);
    gap: 44px;
    align-items: center;
  }
  .page-about .about-honor__media {
    width: 100%;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline__item {
    grid-template-columns: 1fr 56px 1fr;
    gap: 20px;
  }
  .page-about .about-timeline__item::before {
    left: 50%;
    transform: translateX(-1px);
  }
  .page-about .about-timeline__marker {
    grid-column: 2;
    grid-row: 1;
    width: 56px;
    padding-top: 24px;
  }
  .page-about .about-timeline__marker .about-timeline__dot {
    margin-inline: auto;
  }
  .page-about .about-timeline__card {
    grid-row: 1;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    grid-column: 3;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 1;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    margin-left: 8px;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    margin-right: 8px;
  }
  .page-about .about-tech__metrics {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
  .page-about .about-tech__features {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .about-cta__title {
    font-size: 2.4rem;
  }
}