.page-about {
  --about-hero-line: rgba(255, 255, 255, 0.18);
  --about-dark-muted: rgba(255, 255, 255, 0.74);
  --about-body-muted: rgba(26, 26, 46, 0.74);
  --about-card-bg: #ffffff;
  background: var(--color-bg);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 40px;
  padding-bottom: 12px;
}

.page-about .section-label {
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .section-label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.page-about .about-story-copy h2,
.page-about .about-milestone h2,
.page-about .about-team h2,
.page-about .about-tech-copy h2,
.page-about .about-honor h2,
.page-about .about-cta h2 {
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-about img {
  max-width: 100%;
}

/* ===== 首屏：框景品牌宣言 ===== */
.page-about .about-hero {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 32px 0 64px;
  position: relative;
}

.page-about .about-hero-frame {
  position: relative;
  border: 1px solid var(--about-hero-line);
  padding: 22px 20px 28px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 62%);
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 36px;
  height: 36px;
  border-style: solid;
  border-color: var(--color-accent);
  pointer-events: none;
}

.page-about .about-hero-frame::before {
  top: -1px;
  left: -1px;
  border-width: 3px 0 0 3px;
}

.page-about .about-hero-frame::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 3px 3px 0;
}

.page-about .about-hero-kicker {
  font-family: var(--font-number);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-hero-kicker .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
  flex: none;
}

.page-about .about-hero h1 {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.04;
  margin: 16px 0 12px;
  letter-spacing: -0.02em;
}

.page-about .about-hero-lead {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 14px;
}

.page-about .about-hero-desc {
  color: var(--about-dark-muted);
  line-height: 1.8;
  font-size: 0.95rem;
  max-width: 620px;
}

.page-about .about-hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.48);
  color: var(--color-white);
}

.page-about .about-hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.page-about .about-hero-meta {
  margin-top: 32px;
  border-top: 1px solid var(--about-hero-line);
  padding-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 24px;
}

.page-about .about-hero-meta div {
  min-width: 0;
}

.page-about .about-hero-meta dt {
  font-family: var(--font-number);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: 4px;
}

.page-about .about-hero-meta dd {
  margin: 0;
  font-family: var(--font-number);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-white);
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  padding: 56px 0;
}

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

.page-about .about-story-copy h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 22px;
}

.page-about .about-story-copy p {
  color: var(--about-body-muted);
  line-height: 1.85;
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.page-about .about-story-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-story-points li {
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-ink);
}

.page-about .about-story-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 2px;
  background: var(--color-accent);
}

.page-about .about-story-figure {
  position: relative;
  margin: 0;
}

.page-about .about-story-figure::before {
  content: "";
  position: absolute;
  left: -12px;
  top: -12px;
  width: 170px;
  height: 170px;
  border-top: 3px solid var(--color-accent);
  border-left: 3px solid var(--color-accent);
  border-radius: 18px 0 0 0;
  pointer-events: none;
}

.page-about .about-story-figure img {
  position: relative;
  width: 100%;
  height: auto;
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestone {
  background: var(--color-secondary-bg);
  padding: 56px 0;
}

.page-about .about-milestone h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 4px 0 12px;
}

.page-about .about-timeline-ticks {
  display: block;
  width: 100%;
  max-width: 480px;
  height: 28px;
  margin: 8px 0 28px;
  color: var(--color-primary);
}

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

.page-about .about-timeline-item {
  position: relative;
  padding-left: 38px;
  padding-bottom: 40px;
}

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

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 30px;
  bottom: 0;
  width: 2px;
  background: rgba(10, 31, 68, 0.18);
}

.page-about .about-timeline-item:last-child::before {
  display: none;
}

.page-about .about-timeline-marker {
  position: absolute;
  left: 0;
  top: 8px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 4px solid var(--color-bg);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.24);
  z-index: 1;
}

.page-about .about-timeline-index {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-primary);
  display: block;
  margin-bottom: 6px;
}

.page-about .about-timeline-content {
  background: var(--about-card-bg);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-timeline-content h3 {
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.page-about .about-timeline-content p {
  margin: 0;
  line-height: 1.7;
  color: var(--about-body-muted);
  font-size: 0.92rem;
}

/* ===== 团队与规模 ===== */
.page-about .about-team {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 56px 0;
}

.page-about .about-team .section-label {
  color: var(--color-accent);
}

.page-about .about-team h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 4px 0 22px;
}

.page-about .about-team-copy p {
  color: var(--about-dark-muted);
  line-height: 1.85;
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.page-about .about-team-stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about .about-team-stat {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-hero-line);
  border-radius: 16px;
  padding: 20px 18px;
}

.page-about .about-team-stat-num {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: clamp(2.8rem, 8vw, 4.2rem);
  line-height: 1;
  color: var(--color-accent);
  display: block;
}

.page-about .about-team-stat-label {
  display: block;
  margin-top: 10px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.62);
}

/* ===== 技术实力 ===== */
.page-about .about-tech {
  padding: 56px 0;
}

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

.page-about .about-tech-copy {
  order: 1;
}

.page-about .about-tech-copy h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 22px;
}

.page-about .about-tech-copy p {
  color: var(--about-body-muted);
  line-height: 1.85;
  font-size: 0.98rem;
  margin-bottom: 22px;
}

.page-about .about-tech-copy ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-tech-copy li {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.page-about .about-tech-copy li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  transform: rotate(45deg);
  flex: none;
}

.page-about .about-tech-figure {
  position: relative;
  margin: 0;
  order: 2;
}

.page-about .about-tech-figure::after {
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 160px;
  height: 160px;
  border-right: 3px solid var(--color-accent);
  border-bottom: 3px solid var(--color-accent);
  border-radius: 0 0 18px 0;
  pointer-events: none;
}

.page-about .about-tech-figure img {
  position: relative;
  width: 100%;
  height: auto;
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}

/* ===== 荣誉与合作 ===== */
.page-about .about-honor {
  background: var(--color-white);
  padding: 56px 0;
}

.page-about .about-honor-head {
  display: grid;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-honor h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 4px 0 0;
}

.page-about .about-honor-desc {
  margin: 0;
  color: var(--about-body-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

.page-about .about-honor-badges {
  display: grid;
  gap: 20px;
}

.page-about .about-honor-badge {
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: 16px;
  padding: 24px 22px;
  background: var(--color-bg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-honor-badge:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.page-about .about-honor-icon {
  width: 44px;
  height: 44px;
  color: var(--color-primary);
  display: block;
  margin-bottom: 16px;
}

.page-about .about-honor-badge h3 {
  font-size: 1.12rem;
  margin: 0 0 8px;
}

.page-about .about-honor-badge p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--about-body-muted);
}

.page-about .about-honor-banner {
  margin: 36px 0 0;
  position: relative;
}

.page-about .about-honor-banner img {
  width: 100%;
  height: auto;
  border-radius: 18px;
  display: block;
  box-shadow: var(--shadow-sm);
}

/* ===== 底部行动区 ===== */
.page-about .about-cta {
  padding: 64px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.page-about .about-cta .container {
  position: relative;
}

.page-about .about-cta .section-label {
  display: inline-flex;
}

.page-about .about-cta h2 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 14px 0 16px;
}

.page-about .about-cta p {
  color: var(--about-body-muted);
  line-height: 1.75;
  margin: 0 auto 28px;
  max-width: 520px;
}

.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-frame {
    padding: 34px 32px 40px;
  }

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

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

@media (min-width: 900px) {
  .page-about .breadcrumb {
    padding-top: 56px;
  }

  .page-about .about-hero {
    padding: 48px 0 88px;
  }

  .page-about .about-hero-frame {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 56px;
    align-items: end;
    padding: 48px;
  }

  .page-about .about-hero-meta {
    margin-top: 0;
    border-top: 0;
    border-left: 1px solid var(--about-hero-line);
    padding-top: 0;
    padding-left: 44px;
    grid-template-columns: 1fr;
    align-content: end;
    gap: 20px;
  }

  .page-about .about-story,
  .page-about .about-milestone,
  .page-about .about-team,
  .page-about .about-tech,
  .page-about .about-honor {
    padding: 96px 0;
  }

  .page-about .about-story-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 72px;
    align-items: center;
  }

  .page-about .about-story-figure {
    justify-self: end;
  }

  .page-about .about-story-figure img {
    width: 100%;
    max-width: 640px;
    height: 600px;
    object-fit: cover;
  }

  .page-about .about-milestone h2 {
    margin-bottom: 16px;
  }

  .page-about .about-timeline-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 56px;
    align-items: start;
    padding-left: 0;
  }

  .page-about .about-timeline-item::before {
    left: 160px;
    top: 44px;
    bottom: 0;
  }

  .page-about .about-timeline-item:last-child::before {
    display: none;
  }

  .page-about .about-timeline-marker {
    left: 153px;
    top: 14px;
    width: 14px;
    height: 14px;
    border-width: 3px;
  }

  .page-about .about-timeline-index {
    text-align: right;
    font-size: 1.9rem;
    padding-top: 6px;
    margin-bottom: 0;
  }

  .page-about .about-timeline-content {
    padding: 26px 30px;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
  }

  .page-about .about-timeline-content:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
  }

  .page-about .about-team-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 80px;
    align-items: center;
  }

  .page-about .about-team-stats {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 0;
    gap: 20px;
  }

  .page-about .about-tech-inner {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: center;
  }

  .page-about .about-tech-copy {
    order: 2;
  }

  .page-about .about-tech-figure {
    order: 1;
  }

  .page-about .about-tech-figure img {
    height: 640px;
    width: 100%;
    object-fit: cover;
  }

  .page-about .about-honor-head {
    grid-template-columns: 1fr 380px;
    align-items: end;
    gap: 48px;
    margin-bottom: 48px;
  }

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

  .page-about .about-honor-banner {
    margin-top: 48px;
  }

  .page-about .about-honor-banner img {
    max-height: 400px;
    object-fit: cover;
  }

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