.page-about {
  position: relative;
  background: var(--color-primary);
  color: var(--color-text);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb .container {
  padding-top: 28px;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
  background:
    radial-gradient(circle at 85% 20%, rgba(180, 77, 255, 0.18), transparent 42%),
    radial-gradient(circle at 10% 90%, rgba(0, 255, 179, 0.12), transparent 40%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(180, 77, 255, 0.35);
  opacity: 0.6;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 179, 0.1);
  border: 1px solid rgba(0, 255, 179, 0.3);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  margin: 0;
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-headline);
  font-size: clamp(38px, 9vw, 68px);
  line-height: 1.06;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  color: var(--color-text-secondary);
  font-size: 17px;
  line-height: 1.75;
  max-width: 560px;
}

.page-about .about-hero__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.page-about .about-hero__visual {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  gap: 16px;
  min-height: 180px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(180, 77, 255, 0.35);
  background: linear-gradient(145deg, rgba(180, 77, 255, 0.2), rgba(18, 42, 84, 0.25));
}

.page-about .about-hero__index {
  font-family: var(--font-headline);
  font-size: 64px;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-hero__quote {
  margin: 0;
  font-family: var(--font-headline);
  font-size: 22px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  max-width: 6em;
  line-height: 1.2;
}

/* 区块标题 */
.page-about .about-section-head {
  margin: 0 0 36px;
  max-width: 680px;
}

.page-about .about-section-head--left {
  margin-left: 0;
}

.page-about .about-section-head__tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(180, 77, 255, 0.14);
  border: 1px solid rgba(180, 77, 255, 0.4);
  color: var(--color-accent-alt);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  margin: 0 0 14px;
}

.page-about .about-section-head__title {
  font-family: var(--font-headline);
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1.15;
  margin: 0;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .about-section-head__desc {
  margin: 12px 0 0;
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.7;
}

/* 演进历程 */
.page-about .about-journey {
  padding: 72px 0 64px;
}

.page-about .journey-timeline {
  position: relative;
  margin-top: 8px;
}

.page-about .journey-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, rgba(0, 255, 179, 0.7), rgba(180, 77, 255, 0.6));
}

.page-about .journey-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 32px;
  position: relative;
}

.page-about .journey-item__marker {
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 26px;
  margin-left: 1px;
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  background: var(--color-accent-alt);
  box-shadow: 0 0 0 2px var(--color-accent-alt);
}

.page-about .journey-card {
  flex: 1;
  background: var(--color-primary-alt);
  border: 1px solid rgba(168, 184, 216, 0.18);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.page-about .journey-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 255, 179, 0.45);
  box-shadow: var(--shadow);
}

.page-about .journey-card__badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 179, 0.12);
  border: 1px solid rgba(0, 255, 179, 0.3);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.page-about .journey-card__title {
  font-family: var(--font-headline);
  font-size: 20px;
  line-height: 1.25;
  margin: 0 0 10px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .journey-card__text {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .journey-figure {
  margin: 44px 0 0;
}

.page-about .journey-figure .img-frame {
  border: 1px solid rgba(168, 184, 216, 0.18);
}

.page-about .journey-figure figcaption,
.page-about .capability-flow__figure figcaption {
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: right;
}

/* 品牌理念 */
.page-about .about-philosophy {
  padding: 68px 0;
  background: linear-gradient(180deg, rgba(18, 42, 84, 0.5), transparent 100%);
}

.page-about .about-philosophy__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-philosophy__visual .img-frame {
  border: 1px solid rgba(180, 77, 255, 0.3);
}

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

.page-about .about-philosophy__lead {
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  max-width: 540px;
}

.page-about .about-philosophy__lead strong {
  color: var(--color-accent);
}

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

.page-about .philosophy-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-primary-alt);
  border: 1px solid rgba(168, 184, 216, 0.15);
  border-radius: var(--radius);
  padding: 20px;
}

.page-about .philosophy-point__num {
  font-family: var(--font-headline);
  font-size: 24px;
  color: var(--color-accent);
  line-height: 1;
  padding-top: 2px;
}

.page-about .philosophy-point h3 {
  margin: 0;
  font-family: var(--font-headline);
  font-size: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

.page-about .philosophy-point p {
  margin: 6px 0 0;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* 服务能力 */
.page-about .about-capability {
  padding: 72px 0 64px;
  border-top: 1px solid rgba(168, 184, 216, 0.12);
}

.page-about .capability-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}

.page-about .capability-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-alt);
  border: 1px solid rgba(168, 184, 216, 0.16);
  border-radius: var(--radius);
  padding: 22px 16px;
  transition: transform var(--transition), border-color var(--transition);
}

.page-about .capability-stat:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 255, 179, 0.5);
}

.page-about .capability-stat__num {
  font-family: var(--font-headline);
  font-size: clamp(28px, 6vw, 42px);
  line-height: 1;
  color: var(--color-accent);
  text-transform: uppercase;
}

.page-about .capability-stat__label {
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-size: 14px;
  text-align: center;
}

.page-about .capability-flow {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .capability-flow__figure {
  margin: 0;
}

.page-about .capability-flow__figure .img-frame {
  border: 1px solid rgba(168, 184, 216, 0.18);
}

.page-about .capability-flow__content h3 {
  font-family: var(--font-headline);
  font-size: 22px;
  margin: 0 0 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .capability-flow__content p {
  margin: 0 0 18px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .capability-flow__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .capability-flow__list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.6;
}

.page-about .capability-flow__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-accent-alt);
  transform: rotate(45deg);
}

.page-about .capability-flow__link {
  margin-top: 4px;
}

/* CTA */
.page-about .about-cta {
  padding: 12px 0 80px;
}

.page-about .about-cta__inner {
  padding: 44px 28px;
  border-radius: calc(var(--radius) * 2);
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 255, 179, 0.12), rgba(180, 77, 255, 0.14));
  border: 1px solid rgba(0, 255, 179, 0.28);
}

.page-about .about-cta__title {
  font-family: var(--font-headline);
  font-size: clamp(24px, 5vw, 34px);
  margin: 0 0 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.page-about .about-cta__text {
  margin: 0 0 26px;
  color: var(--color-text-secondary);
  font-size: 16px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ========== 桌面端 ========== */
@media (min-width: 768px) {

  .page-about .about-hero {
    padding: 72px 0 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
  }

  .page-about .about-hero__lead {
    font-size: 18px;
  }

  .page-about .about-hero__visual {
    min-height: 240px;
  }

  .page-about .about-hero__index {
    font-size: 88px;
  }

  .page-about .about-hero__quote {
    font-size: 26px;
  }

  /* 时间轴 → 左右交替 */
  .page-about .journey-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .journey-item {
    display: block;
    width: calc(50% - 56px);
    margin-left: 0;
    margin-bottom: 40px;
  }

  .page-about .journey-item:nth-child(even) {
    margin-left: calc(50% + 56px);
  }

  .page-about .journey-item__marker {
    position: absolute;
    left: calc(100% + 48px);
    top: 26px;
    margin: 0;
    flex: none;
    width: 16px;
    height: 16px;
  }

  .page-about .journey-item:nth-child(even) .journey-item__marker {
    left: -64px;
  }

  .page-about .journey-card {
    height: 100%;
  }

  /* 品牌理念 → 左右分栏 */
  .page-about .about-philosophy__grid {
    grid-template-columns: 0.7fr 1.3fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-philosophy__lead {
    font-size: 18px;
  }

  /* 服务能力 → 统计四列 */
  .page-about .capability-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-bottom: 56px;
  }

  .page-about .capability-flow {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .capability-flow__content {
    padding-top: 8px;
  }

  .page-about .about-cta__inner {
    padding: 60px 48px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__title {
    font-size: 68px;
  }

  .page-about .journey-card {
    padding: 30px;
  }

  .page-about .about-cta__inner {
    padding: 72px 48px;
  }
}