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

/* 英雄区：高原蓝浮岛 + 斜切速度纹理 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin: 16px 0 64px;
  padding: 48px 28px;
  border-radius: var(--radius-lg);
  background: var(--primary);
  color: var(--white);
  z-index: 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -35deg,
    rgba(255, 255, 255, 0.055) 0 2px,
    transparent 2px 28px
  );
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero-watermark {
  position: absolute;
  right: -12px;
  bottom: -36px;
  font-size: clamp(4.5rem, 14vw, 8.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.055);
  white-space: nowrap;
  z-index: 0;
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about .about-hero-content .page-title {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--white);
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 660px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.page-about .about-hero-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--white);
}

.page-about .about-hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .about-hero-stat {
  padding: 16px 10px;
  text-align: center;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
}

.page-about .about-hero-stat.is-accent {
  grid-column: 1 / -1;
  background: var(--accent);
  border-color: var(--accent);
}

.page-about .about-hero-stat .data-number {
  display: block;
  font-family: var(--font-number);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--white);
  margin-bottom: 4px;
  white-space: nowrap;
}

.page-about .about-hero-stat-label {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.8);
}

/* 通用章节节奏 */
.page-about .about-section {
  padding: 64px 0;
}

/* 品牌起源 */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-origin-media {
  position: relative;
}

.page-about .about-origin-media::before {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border-radius: var(--radius-lg);
  border: 2px dashed var(--sky-blue);
  z-index: 0;
}

.page-about .about-origin-img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.page-about .about-origin-copy .section-title {
  margin-top: 8px;
}

.page-about .about-origin-copy p {
  margin: 0 0 16px;
  color: var(--ink);
  opacity: 0.88;
}

.page-about .about-origin-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-origin-list li {
  padding: 10px 16px;
  background: var(--white);
  border: 1px solid var(--sky-blue);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  color: var(--ink);
  box-shadow: var(--shadow-soft);
}

/* 发展里程碑 */
.page-about .about-milestones {
  background: var(--mint);
}

.page-about .about-milestones-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 48px;
  align-items: center;
}

.page-about .about-milestones-copy .section-title {
  margin-top: 8px;
}

.page-about .about-milestones-art {
  position: relative;
  overflow: hidden;
  max-height: 420px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  background: var(--sky-blue);
}

.page-about .about-milestones-art::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 10px;
  width: 44%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  opacity: 0.88;
}

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

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--accent), var(--primary) 65%, var(--data-blue));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 36px;
}

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

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--white);
}

.page-about .timeline-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .timeline-year {
  font-family: var(--font-number);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.page-about .timeline-card {
  border-left: 4px solid var(--accent);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
}

.page-about .timeline-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--ink);
}

.page-about .timeline-card p {
  margin: 0 0 10px;
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.85;
}

.page-about .timeline-card .btn {
  margin-top: 4px;
}

/* 核心理念 */
.page-about .about-principles-head {
  margin-bottom: 32px;
}

.page-about .about-principles-head .section-title {
  margin-top: 8px;
}

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

.page-about .principle-card {
  position: relative;
  padding: 32px 24px 28px;
  border: 1px solid var(--sky-blue);
  border-radius: var(--radius-md);
  background: var(--white);
  overflow: hidden;
}

.page-about .principle-card::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 30px;
  width: 44px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  opacity: 0.7;
  transform: rotate(-28deg);
}

.page-about .principle-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  height: 56px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: var(--white);
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.page-about .principle-card h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--ink);
}

.page-about .principle-card p {
  margin: 0;
  font-size: 0.925rem;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.85;
}

.page-about .principle-card a {
  color: var(--primary);
  font-weight: 500;
  text-decoration: underline;
}

/* 资质与荣誉 */
.page-about .about-honors {
  background: var(--primary);
  color: var(--white);
}

.page-about .about-honors .eyebrow,
.page-about .about-honors .section-title {
  color: var(--white);
}

.page-about .about-honors-sub {
  margin: 12px 0 32px;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
}

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

.page-about .honor-card {
  padding: 28px 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.page-about .honor-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.32);
}

.page-about .honor-mark {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--font-number);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.page-about .honor-card h3 {
  margin: 0 0 10px;
  color: var(--white);
  font-size: 1.05rem;
}

.page-about .honor-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* 合作生态 */
.page-about .about-partners-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-partners-copy .section-title {
  margin-top: 8px;
}

.page-about .about-partners-copy p {
  margin: 0 0 16px;
  color: var(--ink);
  opacity: 0.88;
  line-height: 1.75;
}

.page-about .about-partners-copy .btn {
  margin-top: 8px;
}

.page-about .about-partners-media {
  margin: 0;
}

.page-about .about-partners-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  object-fit: cover;
}

.page-about .about-partners-media figcaption {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--ink);
  opacity: 0.72;
  text-align: center;
}

/* 桌面端栅格增强 */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-hero-content .page-title {
    font-size: 2.75rem;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .page-about .about-hero-stat.is-accent {
    grid-column: auto;
  }

  .page-about .about-hero-stat .data-number {
    font-size: 1.5rem;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
  }

  .page-about .about-milestones-head {
    grid-template-columns: 1.1fr 0.5fr;
    gap: 48px;
  }

  .page-about .about-milestones-art {
    max-height: 560px;
  }

  .page-about .timeline {
    max-width: 860px;
    margin: 0 auto;
  }

  .page-about .principles-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .honors-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }
}