.page-about {
  --about-deco-size: 220px;
  background: #FFFFFF;
  color: var(--color-primary);
  overflow-x: hidden;
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 88px 0 72px;
  background:
    var(--gradient-header-fade),
    linear-gradient(145deg, #071636 0%, var(--color-primary) 48%, var(--color-primary-light) 100%);
  color: #FFFFFF;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -6%;
  width: 52%;
  height: 120%;
  background: rgba(255, 107, 0, 0.08);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 100%);
  transform: skewX(-8deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  right: -80px;
  bottom: -50px;
  width: var(--about-deco-size);
  height: var(--about-deco-size);
  background: var(--gradient-yellow-orange);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.16;
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 40px;
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--color-accent-yellow);
}

.page-about .about-hero .tag {
  padding: 6px 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.page-about .about-hero__content {
  max-width: 640px;
}

.page-about .about-hero__title {
  margin: 18px 0 20px;
  font-family: var(--font-display);
  font-size: var(--font-hero);
  font-weight: 700;
  line-height: 1.14;
  color: #FFFFFF;
  letter-spacing: 0.01em;
}

.page-about .about-hero__title-caption {
  display: block;
  margin-top: 10px;
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-accent-yellow);
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  max-width: 560px;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.8);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 38px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-hero__stat .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  color: #FFFFFF;
}

.page-about .about-hero__stat .stat__label {
  font-size: var(--font-caption);
  color: rgba(255, 255, 255, 0.58);
}

.page-about .about-hero__figure {
  max-width: 560px;
}

.page-about .about-hero__fig {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  background: var(--color-primary-lighter);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 16px 16px 0 rgba(255, 209, 0, 0.16);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 章节标题统一 ===== */
.page-about .section-head__index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent-orange);
}

.page-about .section-head__index::before {
  content: '';
  width: 24px;
  height: 3px;
  background: var(--gradient-yellow-orange);
}

.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--font-section-title);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

.page-about .section-head__desc {
  max-width: 640px;
  margin-top: 10px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* ===== 品牌叙事 ===== */
.page-about .about-story {
  padding-top: 96px;
  padding-bottom: 48px;
}

.page-about .about-story .grid {
  align-items: start;
}

.page-about .about-story__text p {
  margin: 0 0 18px;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text-muted);
}

.page-about .about-story__text .about-story__lead {
  margin-bottom: 20px;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.75;
  color: var(--color-primary);
}

.page-about .about-status {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-status__dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent-yellow);
  box-shadow: 0 0 0 4px rgba(255, 209, 0, 0.2);
}

.page-about .about-status__text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-primary);
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  background: var(--color-primary-tint);
  padding-top: 96px;
  padding-bottom: 96px;
}

.page-about .about-milestones .section-head {
  margin-bottom: 40px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 28px;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 25px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--gradient-yellow-orange);
  opacity: 0.5;
  border-radius: 4px;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 20px;
  align-items: start;
}

.page-about .about-timeline__year {
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: 3px solid var(--color-primary);
  border-radius: 50%;
  background: #FFFFFF;
  color: var(--color-accent-orange);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.14);
}

.page-about .about-timeline__card {
  padding: 24px;
  background: #FFFFFF;
  border-radius: 14px;
  border-left: 4px solid var(--color-accent-yellow);
  box-shadow: 0 8px 28px rgba(10, 31, 68, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(10, 31, 68, 0.14);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--font-card-title);
  font-weight: 700;
  color: var(--color-primary);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.page-about .about-timeline__details {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
}

.page-about .about-timeline__details summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-orange);
}

.page-about .about-timeline__details summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__details summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-weight: 700;
  transition: transform 0.2s ease;
}

.page-about .about-timeline__details[open] summary::after {
  content: '−';
}

.page-about .about-timeline__details p {
  margin-top: 12px;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* ===== 团队实力 ===== */
.page-about .about-team {
  position: relative;
  padding-top: 96px;
  padding-bottom: 96px;
  background: var(--color-primary);
  color: #FFFFFF;
}

.page-about .about-team::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 30%;
  height: 8px;
  background: var(--gradient-yellow-orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 60%);
}

.page-about .about-team .grid {
  align-items: center;
}

.page-about .about-team__media {
  margin-bottom: 32px;
}

.page-about .about-team__fig {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  background: var(--color-primary-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__content .section-head {
  margin-bottom: 20px;
}

.page-about .about-team__content .section-head__title {
  color: #FFFFFF;
}

.page-about .about-team__content > p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-team__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-team__stat .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 700;
  color: #FFFFFF;
}

.page-about .about-team__stat .stat__label {
  font-size: var(--font-caption);
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-team__note {
  padding-left: 16px;
  border-left: 3px solid var(--color-accent-orange);
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.66);
}

/* ===== 资质与合作 ===== */
.page-about .about-credential {
  padding-top: 96px;
  padding-bottom: 96px;
  background: #FFFFFF;
}

.page-about .about-credential .section-head {
  position: relative;
  margin-bottom: 48px;
}

.page-about .about-credential .section-head::after {
  content: 'ECOSYSTEM';
  position: absolute;
  right: 0;
  top: -8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-accent-orange);
}

.page-about .about-awards {
  display: grid;
  gap: 20px;
  margin-bottom: 36px;
}

.page-about .about-award-card {
  padding: 28px 26px;
  border-radius: 16px;
  background: var(--color-accent-yellow);
  color: var(--color-primary);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: transform 0.25s ease;
}

.page-about .about-award-card:hover {
  transform: translateY(-4px);
}

.page-about .about-award-card--alt {
  background: var(--color-accent-orange);
  color: #FFFFFF;
}

.page-about .about-award-card__year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.page-about .about-award-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.page-about .about-award-card__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  opacity: 0.85;
}

.page-about .about-credential__fig {
  margin: 0 0 28px;
  border-radius: 18px;
  overflow: hidden;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-tint);
}

.page-about .about-credential__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-credential__partners-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
}

.page-about .about-credential__partners ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-credential__partners li {
  position: relative;
  padding-left: 22px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.page-about .about-credential__partners li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 12px;
  height: 8px;
  background: var(--gradient-yellow-orange);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

/* ===== 浏览路径 ===== */
.page-about .about-path {
  padding-top: 72px;
  padding-bottom: 72px;
  background: var(--color-primary-tint);
  text-align: center;
}

.page-about .about-path__lead {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
}

.page-about .about-path__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ===== 平板与桌面端 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 112px 0 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }

  .page-about .about-hero__stats {
    gap: 20px;
  }

  .page-about .about-story .grid {
    column-gap: 48px;
  }

  .page-about .about-timeline {
    gap: 32px;
  }

  .page-about .about-timeline::before {
    left: 33px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 68px 1fr;
    gap: 28px;
  }

  .page-about .about-timeline__year {
    width: 68px;
    height: 68px;
    font-size: 1rem;
  }

  .page-about .about-team__media {
    margin-bottom: 0;
  }

  .page-about .about-awards {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 0;
  }

  .page-about .about-credential .section-head {
    margin-bottom: 64px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero__title {
    font-size: var(--font-hero);
  }

  .page-about .about-timeline__card {
    padding: 28px 32px;
  }

  .page-about .about-awards {
    grid-template-columns: 1fr;
  }

  .page-about .about-credential__partners ul {
    gap: 16px;
  }
}