.page-about {
  --about-green: var(--color-accent-green);
  --about-orange: var(--color-accent-orange);
  --about-bg-deep: #060D18;
  background: var(--color-bg-soft);
  color: var(--color-text);
  overflow: hidden;
}

/* ===== Hero 首屏 ===== */
.page-about .about-hero {
  padding: clamp(96px, 10vw, 160px) 20px 48px;
  position: relative;
}

.page-about .about-hero__stage {
  position: relative;
  border-top: 2px solid var(--about-green);
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(135deg, transparent 0%, transparent 78%, rgba(0, 229, 160, 0.06) 78%, rgba(0, 229, 160, 0.06) 82%, transparent 82%),
    var(--color-bg-deep);
  padding: 28px 20px 0;
}

.page-about .about-hero__stage::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 12px;
  right: -12px;
  bottom: -12px;
  border: 1px solid var(--color-line);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__stage-mark {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 10px;
  margin-bottom: 28px;
  text-transform: uppercase;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__content {
  padding-bottom: 8px;
}

.page-about .about-hero__pref {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-green);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
}

.page-about .about-hero__pref::before {
  content: '';
  width: 36px;
  height: 2px;
  background: var(--about-green);
  flex: 0 0 auto;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(56px, 12vw, 112px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 0 0 22px;
}

.page-about .about-hero__lead {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.8;
  max-width: 34em;
  margin: 0 0 28px;
}

.page-about .about-hero__visual {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, transparent 55%, rgba(8, 15, 29, 0.55) 85%, rgba(8, 15, 29, 0.9) 100%);
  pointer-events: none;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 0 10px;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

/* ===== 品牌叙事 ===== */
.page-about .about-story {
  padding: 72px 20px;
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-story__aside {
  border-left: 3px solid var(--about-orange);
  padding-left: 20px;
}

.page-about .about-story__aside .section__heading {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.1;
  margin: 10px 0 16px;
}

.page-about .about-story__aside-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-story__main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-story__para {
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-muted);
  margin: 0;
  max-width: 44em;
}

.page-about .about-story__note {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  padding: 18px 20px;
  margin-top: 8px;
}

.page-about .about-story__note-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-green);
  line-height: 1;
  flex: 0 0 auto;
}

.page-about .about-story__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ===== 数据规模 ===== */
.page-about .about-stats {
  padding: 56px 20px 72px;
  background:
    linear-gradient(120deg, transparent 0%, transparent 86%, rgba(0, 229, 160, 0.35) 86%, rgba(0, 229, 160, 0.35) 88%, transparent 88%),
    var(--color-primary-deep);
  position: relative;
}

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

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-stats__item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--about-orange);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 120px;
}

.page-about .about-stats__item:nth-child(2),
.page-about .about-stats__item:nth-child(4) {
  border-top-color: var(--about-green);
}

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.page-about .about-stats__label {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-muted);
}

/* ===== 发展轨迹 ===== */
.page-about .about-journey {
  padding: 72px 20px;
}

.page-about .about-journey__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-journey__aside {
  border-right: 1px solid var(--color-line);
  padding-right: 24px;
}

.page-about .about-journey__aside .section__heading {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.1;
  margin: 10px 0 24px;
}

.page-about .about-journey__img {
  margin-top: 8px;
}

.page-about .about-journey__img img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-journey__list {
  border-left: 1px solid var(--color-line-strong);
  padding-left: 24px;
}

.page-about .about-journey__item {
  position: relative;
  padding: 0 0 32px 8px;
}

.page-about .about-journey__item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--about-green);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--about-green);
}

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

.page-about .about-journey__year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--about-orange);
  display: block;
  margin-bottom: 6px;
}

.page-about .about-journey__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.page-about .about-journey__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
  max-width: 40em;
}

/* ===== 核心能力 ===== */
.page-about .about-capabilities {
  padding: 64px 20px 72px;
  background:
    linear-gradient(315deg, transparent 0%, transparent 92%, rgba(255, 107, 53, 0.18) 92%, rgba(255, 107, 53, 0.18) 100%),
    var(--color-bg);
}

.page-about .about-capabilities__head {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 24px;
}

.page-about .about-capabilities__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-capabilities__item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  padding: 26px 22px;
  position: relative;
  transition: border-color 0.25s var(--ease);
}

.page-about .about-capabilities__item:hover {
  border-color: var(--about-green);
}

.page-about .about-capabilities__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--about-green);
  background: rgba(0, 229, 160, 0.08);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.page-about .about-capabilities__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-about .about-capabilities__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
}

/* ===== 区域专注 ===== */
.page-about .about-region {
  padding: 72px 20px;
}

.page-about .about-region__panel {
  background:
    linear-gradient(160deg, rgba(0, 229, 160, 0.08) 0%, transparent 42%),
    var(--color-primary-deep);
  border: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-region__text {
  padding: 36px 24px;
}

.page-about .about-region__text .section__heading {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.05;
  margin: 10px 0 18px;
}

.page-about .about-region__text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0;
}

.page-about .about-region__visual {
  position: relative;
  overflow: hidden;
}

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

/* ===== CTA 入口 ===== */
.page-about .about-cta {
  padding: 16px 20px 72px;
}

.page-about .about-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 2px solid var(--about-orange);
  padding-top: 28px;
}

.page-about .about-cta__text {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  text-transform: uppercase;
}

/* ===== 桌面端布局 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-right: 40px;
    padding-left: 40px;
  }

  .page-about .about-hero__stage {
    padding: 44px 40px 0;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 55fr 45fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .about-hero__title {
    font-size: clamp(72px, 9vw, 128px);
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-story {
    padding: 100px 40px;
  }

  .page-about .about-story__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
  }

  .page-about .about-story__aside {
    border-left-width: 4px;
    padding-left: 28px;
  }

  .page-about .about-stats {
    padding: 80px 40px 96px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .page-about .about-stats__item {
    min-height: 160px;
    padding: 32px 24px;
  }

  .page-about .about-stats__num {
    font-size: clamp(40px, 4vw, 60px);
  }

  .page-about .about-journey {
    padding: 100px 40px;
  }

  .page-about .about-journey__grid {
    grid-template-columns: 1fr 1.4fr;
    gap: 64px;
  }

  .page-about .about-journey__list {
    padding-left: 40px;
  }

  .page-about .about-journey__item::before {
    left: -45px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-journey__desc {
    font-size: 15px;
  }

  .page-about .about-capabilities {
    padding: 88px 40px 96px;
  }

  .page-about .about-capabilities__list {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

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

  .page-about .about-region {
    padding: 96px 40px;
  }

  .page-about .about-region__panel {
    grid-template-columns: 1.1fr 1fr;
  }

  .page-about .about-region__text {
    padding: 56px 48px;
  }

  .page-about .about-region__text p {
    font-size: 16px;
  }

  .page-about .about-cta {
    padding-right: 40px;
    padding-left: 40px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero,
  .page-about .about-story,
  .page-about .about-stats,
  .page-about .about-journey,
  .page-about .about-capabilities,
  .page-about .about-region,
  .page-about .about-cta {
    padding-right: 0;
    padding-left: 0;
  }
}

.page-about {
  --color-bg-deep: var(--color-bg);
}