.page-about {
  --about-grid: 44px;
  background: var(--color-bg);
  color: var(--color-light);
  overflow-x: hidden;
}

/* ========== Hero 首屏 ========== */
.page-about .about-hero {
  position: relative;
  min-height: 82vh;
  padding-top: calc(var(--header-h) + var(--space-5));
  padding-bottom: var(--space-6);
  display: flex;
  align-items: center;
  background:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
  background-size: var(--about-grid) var(--about-grid);
  background-position: center;
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--space-5);
  align-items: center;
  width: 100%;
}

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

.page-about .about-hero__copy .kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-about .about-hero__copy .display-title {
  font-size: clamp(2.2rem, 8vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
}

.page-about .about-hero__lead {
  max-width: 30em;
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-5);
}

.page-about .about-hero__badges {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-electric);
}

.page-about .about-hero__badges li::before {
  content: "◆";
  color: var(--color-orange);
  margin-right: var(--space-2);
}

.page-about .about-hero__coord-panel {
  position: relative;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-indigo) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow: hidden;
  justify-self: stretch;
}

.page-about .about-hero__coord-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(120deg, transparent 0 10px, rgba(0, 229, 255, 0.07) 10px 12px);
  pointer-events: none;
}

.page-about .about-hero__coord-label {
  font-family: var(--font-data);
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  color: var(--color-neon);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.page-about .about-hero__coord-num {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--color-light);
  line-height: 1.15;
}

.page-about .about-hero__coord-caption {
  font-family: var(--font-data);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: rgba(232, 232, 232, 0.55);
  margin-top: var(--space-2);
}

.page-about .about-hero .about-hero__trajectory {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}

/* ========== 品牌缘起 ========== */
.page-about .about-origin {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .about-origin__head {
  margin-bottom: var(--space-4);
}

.page-about .about-origin__grid {
  display: grid;
  gap: var(--space-5);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0 0 var(--space-3);
  color: var(--color-muted);
}

.page-about .about-origin__text p:first-of-type {
  font-size: 1.15rem;
  color: var(--color-light);
}

.page-about .about-origin__text a {
  color: var(--color-electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-about .about-origin__figure {
  margin: 0;
}

.page-about .about-origin__figure .image-frame {
  aspect-ratio: 3 / 2;
  min-height: 220px;
}

.page-about .about-origin__figure figcaption {
  margin-top: var(--space-2);
  font-size: 0.8rem;
  font-family: var(--font-data);
  color: var(--color-muted);
}

/* ========== 坐标与距离的哲学 ========== */
.page-about .about-philosophy {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .about-philosophy__head {
  margin-bottom: var(--space-3);
}

.page-about .about-philosophy__quote {
  margin: 0 0 var(--space-5);
  padding: var(--space-4) 0 var(--space-4) var(--space-5);
  border-left: 3px solid var(--color-orange);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 300;
  line-height: 1.4;
  color: var(--color-light);
}

.page-about .about-philosophy__cards {
  gap: var(--space-4);
}

.page-about .about-philosophy__card {
  padding: var(--space-4);
  position: relative;
}

.page-about .about-philosophy__num {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-neon);
  letter-spacing: 0.2em;
}

.page-about .about-philosophy__card h3 {
  margin: var(--space-2) 0 var(--space-2);
  font-size: 1.25rem;
}

.page-about .about-philosophy__card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* ========== 发展里程碑 ========== */
.page-about .about-milestone {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  position: relative;
}

.page-about .about-milestone__head {
  margin-bottom: var(--space-4);
}

.page-about .about-milestone__svg {
  width: 100%;
  height: auto;
  max-height: 180px;
  margin-bottom: var(--space-4);
  opacity: 0.7;
}

.page-about .about-milestone__timeline {
  position: relative;
  padding-left: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-about .about-milestone__timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-electric), var(--color-neon), transparent);
}

.page-about .about-milestone__item {
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.page-about .about-milestone__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-5) + 2px);
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-orange);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-orange);
  transform: translateX(-50%);
}

.page-about .about-milestone__year {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-neon);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.page-about .about-milestone__card {
  padding: var(--space-4);
  position: relative;
  border-left: 3px solid var(--color-electric);
}

.page-about .about-milestone__card h3 {
  margin: 0 0 var(--space-2);
  font-size: 1.1rem;
}

.page-about .about-milestone__card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* ========== 数据与技术 ========== */
.page-about .about-tech {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

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

.page-about .about-tech__head {
  margin-bottom: var(--space-3);
}

.page-about .about-tech__lead {
  font-size: 1.1rem;
  color: var(--color-light);
  margin: var(--space-3) 0;
}

.page-about .about-tech__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.page-about .about-tech__stat {
  padding: var(--space-4) var(--space-3);
}

.page-about .about-tech__num {
  font-family: var(--font-data);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--color-electric);
  display: block;
}

.page-about .about-tech__label {
  font-size: 0.8rem;
  color: var(--color-muted);
  display: block;
  margin-top: var(--space-1);
}

.page-about .about-tech__note {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.page-about .about-tech__figure {
  margin: 0;
}

.page-about .about-tech__figure .image-frame {
  aspect-ratio: 8 / 5;
  min-height: 260px;
}

.page-about .about-tech__figure figcaption {
  margin-top: var(--space-2);
  font-size: 0.8rem;
  font-family: var(--font-data);
  color: var(--color-muted);
}

/* ========== 云南基因 ========== */
.page-about .about-yunnan {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .about-yunnan__head {
  margin-bottom: var(--space-4);
}

.page-about .about-yunnan__layout {
  display: grid;
  gap: var(--space-5);
}

.page-about .about-yunnan__quote {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--color-light);
  margin: var(--space-2) 0 var(--space-3);
}

.page-about .about-yunnan__meta p:not(.about-yunnan__quote) {
  color: var(--color-muted);
}

.page-about .about-yunnan__meta .btn {
  margin-top: var(--space-3);
}

.page-about .about-yunnan__figure {
  margin: 0;
}

.page-about .about-yunnan__figure .image-frame {
  aspect-ratio: 5 / 3;
  min-height: 280px;
}

.page-about .about-yunnan__figure figcaption {
  margin-top: var(--space-2);
  font-size: 0.8rem;
  font-family: var(--font-data);
  color: rgba(232, 232, 232, 0.7);
}

/* ========== CTA 探索更多 ========== */
.page-about .about-cta {
  padding-top: var(--space-6);
  padding-bottom: var(--space-7);
}

.page-about .about-cta__inner {
  text-align: center;
}

.page-about .about-cta__inner h2 {
  margin: 0 0 var(--space-2);
}

.page-about .about-cta__inner p {
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ========== 桌面端增强 ========== */
@media (min-width: 768px) {
  .page-about .about-hero {
    min-height: 86vh;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.75fr;
    gap: var(--space-6);
  }

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

  .page-about .about-origin__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-6);
  }

  .page-about .about-milestone__item {
    grid-template-columns: 110px 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
  }

  .page-about .about-milestone__year {
    text-align: right;
    padding-top: var(--space-3);
    font-size: 2.4rem;
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-6);
    align-items: center;
  }

  .page-about .about-yunnan__layout {
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-6);
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.25fr 0.65fr;
    gap: var(--space-7);
  }

  .page-about .about-origin {
    padding-top: var(--space-7);
    padding-bottom: var(--space-7);
  }

  .page-about .about-milestone__svg {
    max-height: 220px;
  }

  .page-about .about-tech {
    padding-top: var(--space-7);
    padding-bottom: var(--space-7);
  }

  .page-about .about-yunnan {
    padding-top: var(--space-7);
    padding-bottom: var(--space-7);
  }

  .page-about .about-yunnan__layout {
    grid-template-columns: 0.7fr 1.3fr;
    gap: var(--space-7);
  }
}