.page-about {
  --about-text: #334155;
  --about-border: #E2E8F0;
  --about-bg-alt: #EDF2F7;
  background: var(--color-offwhite);
  color: var(--color-ink);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: var(--space-4);
  padding-bottom: var(--space-2);
  color: var(--color-navy);
  font-family: var(--font-body);
  font-size: 0.875rem;
}

.page-about .breadcrumb a {
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--color-orange);
}

.page-about .breadcrumb__sep {
  margin: 0 var(--space-2);
  color: var(--color-orange);
}

.page-about .section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-about .section-kicker::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  border-radius: 2px;
  flex-shrink: 0;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-deep) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 48% 52% 62% 38% / 45% 55% 45% 55%;
  background: rgba(255, 107, 53, 0.13);
  top: -160px;
  right: -120px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 62% 38% 48% 52% / 55% 45% 55% 45%;
  background: rgba(255, 215, 0, 0.07);
  bottom: -120px;
  left: 24%;
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  padding-top: var(--space-5);
  padding-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-4);
  max-width: 15em;
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  max-width: 58ch;
  margin-bottom: var(--space-5);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  padding: 0;
  margin: 0 0 var(--space-4);
}

.page-about .about-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-hero__meta .statistical-number {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.375rem;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-hero__meta .statistical-number--orange {
  color: var(--color-orange);
}

.page-about .about-hero__anchors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-family: var(--font-body);
  margin-bottom: var(--space-5);
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  max-width: fit-content;
}

.page-about .about-hero__anchors-label {
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-hero__anchors a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.page-about .about-hero__anchors a:hover {
  color: var(--color-orange);
}

.page-about .about-hero__anchor-sep {
  color: rgba(255, 255, 255, 0.3);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-about .about-hero .btn--ghost {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.55);
  color: var(--color-white);
}

.page-about .about-hero .btn--ghost:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.page-about .about-hero__visual {
  position: relative;
  align-self: start;
}

.page-about .about-hero__image {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  border-radius: 28px 28px 28px 8px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.page-about .about-hero__badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--color-orange);
  border-radius: 18px 18px 18px 6px;
  padding: var(--space-2) var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: rotate(4deg);
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.45);
}

.page-about .about-hero__badge-num {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.75rem;
  line-height: 1.2;
  color: var(--color-white);
}

.page-about .about-hero__badge-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.92);
  margin-top: 2px;
}

.page-about .about-hero__vnote {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-2);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* ===== 品牌叙事 ===== */
.page-about .about-narrative {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: var(--color-offwhite);
}

.page-about .about-narrative::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 58% 42% 52% 48% / 48% 56% 44% 52%;
  background: rgba(255, 107, 53, 0.05);
  left: -100px;
  top: 40px;
  pointer-events: none;
}

.page-about .about-narrative__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  position: relative;
  z-index: 1;
}

.page-about .about-narrative h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.page-about .about-narrative__lead {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--color-navy);
  border-left: 4px solid var(--color-orange);
  padding-left: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-about .about-narrative__text p:not(.about-narrative__lead) {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-text);
  margin-bottom: var(--space-3);
}

.page-about .about-narrative__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  align-content: start;
}

.page-about .about-narrative__stat {
  background: var(--color-white);
  border-radius: 20px 20px 20px 6px;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  box-shadow: 0 4px 16px rgba(10, 31, 68, 0.06);
  border-top: 3px solid var(--color-gold);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-narrative__stat:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(10, 31, 68, 0.1);
}

.page-about .about-narrative__stat .statistical-number {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 2rem;
  color: var(--color-navy);
  line-height: 1.1;
}

.page-about .about-narrative__stat .statistical-number--gold {
  color: var(--color-navy);
  position: relative;
}

.page-about .about-narrative__stat:nth-child(1) .statistical-number {
  color: var(--color-orange);
}

.page-about .about-narrative__stat:nth-child(2) .statistical-number {
  color: var(--color-orange);
}

.page-about .about-narrative__stat-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--about-text);
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: var(--color-white);
  overflow: hidden;
}

.page-about .about-milestones::before {
  content: '';
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 46% 54% 58% 42% / 58% 44% 56% 42%;
  background: rgba(10, 31, 68, 0.025);
  right: -160px;
  top: -80px;
  pointer-events: none;
}

.page-about .about-milestones__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  position: relative;
  z-index: 1;
}

.page-about .about-milestones__intro h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--color-navy);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.page-about .about-milestones__intro p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-text);
  max-width: 38ch;
}

.page-about .about-milestones__vnote {
  display: block;
  margin-top: var(--space-4);
  color: var(--color-orange);
  font-size: 0.875rem;
}

.page-about .about-timeline {
  position: relative;
}

.page-about .about-timeline__line {
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 40px;
  height: 100%;
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0.7;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 64px;
  padding-bottom: var(--space-4);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 8px;
  width: 18px;
  height: 18px;
  background: var(--color-navy);
  border: 3px solid var(--color-gold);
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.2);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--color-orange);
  display: block;
  margin-bottom: var(--space-1);
  line-height: 1.2;
}

.page-about .about-timeline__card {
  background: var(--color-offwhite);
  border-radius: 16px 16px 16px 4px;
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--color-gold);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__card:hover {
  background: var(--color-white);
  box-shadow: 0 8px 24px rgba(10, 31, 68, 0.08);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 var(--space-1);
  color: var(--color-navy);
}

.page-about .about-timeline__card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--about-text);
  margin: 0;
}

/* ===== 团队与技术 ===== */
.page-about .about-tech {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: var(--color-offwhite);
}

.page-about .about-tech__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .about-tech h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--color-navy);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.page-about .about-tech__lead {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text);
  max-width: 58ch;
  margin-bottom: var(--space-4);
}

.page-about .about-tech__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-about .about-tech__card {
  background: var(--color-white);
  border-radius: 16px 16px 16px 4px;
  padding: var(--space-4);
  box-shadow: 0 3px 12px rgba(10, 31, 68, 0.05);
  border-top: 3px solid var(--color-orange);
}

.page-about .about-tech__card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 var(--space-2);
  color: var(--color-navy);
}

.page-about .about-tech__card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-tech__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-about .about-tech__metric {
  background: var(--color-navy);
  border-radius: 14px 14px 14px 4px;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-white);
}

.page-about .about-tech__metric .statistical-number {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.375rem;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-tech__metric:nth-child(2) .statistical-number {
  color: var(--color-orange);
}

.page-about .about-tech__metric-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-tech__visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 24px 24px 24px 6px;
  box-shadow: 0 12px 30px rgba(10, 31, 68, 0.15);
}

/* ===== 数据覆盖 ===== */
.page-about .about-coverage {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-deep) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.page-about .about-coverage::before {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 52% 48% 44% 56% / 48% 44% 56% 52%;
  background: rgba(255, 215, 0, 0.05);
  left: -140px;
  bottom: -120px;
  pointer-events: none;
}

.page-about .about-coverage .section-kicker {
  color: var(--color-gold);
}

.page-about .about-coverage h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.page-about .about-coverage__header p {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.75);
  max-width: 64ch;
  margin-bottom: var(--space-5);
}

.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.page-about .about-coverage__item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 20px 20px 20px 6px;
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-about .about-coverage__item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-3px);
}

.page-about .about-coverage__num {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 2.25rem;
  line-height: 1.2;
  display: block;
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.page-about .about-coverage__item:nth-child(2) .about-coverage__num {
  color: var(--color-orange);
}

.page-about .about-coverage__item h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 var(--space-1);
  color: var(--color-white);
}

.page-about .about-coverage__item p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

/* ===== 贵阳基因 ===== */
.page-about .about-guiyang {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: var(--color-white);
}

.page-about .about-guiyang::after {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 60% 40% 52% 48% / 46% 56% 44% 54%;
  background: rgba(255, 107, 53, 0.045);
  right: -80px;
  top: 30%;
  pointer-events: none;
}

.page-about .about-guiyang__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  position: relative;
  z-index: 1;
}

.page-about .about-guiyang__visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 28px 28px 28px 6px;
  box-shadow: 0 14px 34px rgba(10, 31, 68, 0.14);
}

.page-about .about-guiyang h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--color-navy);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.page-about .about-guiyang__content p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-text);
  margin-bottom: var(--space-3);
}

.page-about .about-guiyang .btn {
  margin-top: var(--space-2);
}

/* ===== 页尾反馈带 ===== */
.page-about .about-feedback {
  background: linear-gradient(120deg, var(--color-orange) 0%, #FF8C42 100%);
  color: var(--color-white);
  border-radius: 36px 36px 0 0;
  margin-top: var(--space-4);
  margin-bottom: 0;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .about-feedback__inner {
  text-align: center;
  max-width: 720px;
}

.page-about .about-feedback h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 var(--space-3);
  color: var(--color-white);
  line-height: 1.2;
}

.page-about .about-feedback p {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-4);
}

.page-about .about-feedback .btn--primary {
  background: var(--color-white);
  color: var(--color-orange);
  border: 2px solid transparent;
}

.page-about .about-feedback .btn--primary:hover {
  background: var(--color-offwhite);
  transform: translateY(-2px);
}

/* ===== 平板 ===== */
@media (min-width: 48rem) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-6);
    padding-top: var(--space-6);
    padding-bottom: var(--space-7);
    align-items: center;
  }

  .page-about .about-hero__image {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-narrative__grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .about-narrative__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .page-about .about-milestones__grid {
    grid-template-columns: 4fr 6fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .about-timeline__item {
    padding-left: 72px;
  }

  .page-about .about-timeline__item::before {
    left: 18px;
  }

  .page-about .about-timeline__line {
    left: 26px;
  }

  .page-about .about-tech__grid {
    grid-template-columns: 3fr 2fr;
    gap: var(--space-6);
    align-items: start;
  }

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

  .page-about .about-coverage__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .page-about .about-guiyang__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-6);
    align-items: center;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 64rem) {
  .page-about .about-hero__inner {
    grid-template-columns: 6fr 4fr;
  }

  .page-about .about-hero__vnote {
    left: calc(var(--space-4) * -1);
    bottom: var(--space-5);
  }

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

  .page-about .about-coverage__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-tech__metrics {
    flex-wrap: nowrap;
  }

  .page-about .about-milestones__intro {
    position: sticky;
    top: var(--space-5);
    align-self: start;
  }

  .page-about .about-timeline__list {
    padding-right: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}