.page-about {
  --about-hero-minh: 520px;
  --about-stat-gap: 1rem;
  --about-card-minh: 240px;
  --about-shape-size: 180px;
  display: block;
  width: 100%;
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.page-about .breadcrumb a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--accent-light);
  text-decoration: underline;
}
.page-about .breadcrumb .separator {
  color: var(--text-muted);
  user-select: none;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-primary);
  font-weight: 500;
}

/* ===== 首屏 — 海报式分层 ===== */
.page-about .about-hero {
  position: relative;
  min-height: var(--about-hero-minh);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  margin-bottom: 0;
}
.page-about .about-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .about-hero-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}
.page-about .about-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13,27,42,0.30) 0%, rgba(13,27,42,0.92) 85%);
}
.page-about .about-hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 3rem 1.25rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 14vw, 6.5rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin: 0;
  max-width: 4ch;
  word-break: break-word;
  text-shadow: 0 4px 32px rgba(0,0,0,0.6);
}
.page-about .about-hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 3vw, 1.5rem);
  letter-spacing: 0.15em;
  color: var(--accent);
  margin: 0 0 0.5rem;
  text-shadow: 0 2px 16px rgba(0,0,0,0.5);
}
.page-about .about-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--about-stat-gap);
  margin-top: 0.5rem;
}
.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background: rgba(27,40,56,0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--border-accent);
  border-radius: 8px;
  padding: 0.75rem 1.25rem 0.6rem;
  min-width: 100px;
}
.page-about .about-hero-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.page-about .about-hero-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.page-about .about-hero-accent-block {
  position: absolute;
  right: -60px;
  top: 10%;
  width: 200px;
  height: 200px;
  background: var(--accent-gradient);
  opacity: 0.08;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* ===== 品牌定位 ===== */
.page-about .about-position {
  padding-top: 3.5rem;
  padding-bottom: 3rem;
}
.page-about .about-position-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  align-items: flex-start;
}
.page-about .about-position-text {
  flex: 1 1 100%;
}
.page-about .about-position-text .section-title {
  margin-bottom: 1.25rem;
}
.page-about .about-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 1.2rem;
  max-width: 60ch;
}
.page-about .about-btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.7rem 2rem;
  border-radius: 6px;
  background: var(--accent-gradient);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  border: none;
  cursor: pointer;
}
.page-about .about-btn:hover,
.page-about .about-btn:focus-visible {
  opacity: 0.88;
  transform: translateY(-2px);
}
.page-about .about-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.page-about .about-position-visual {
  position: relative;
  width: 100%;
  min-height: 200px;
  flex-shrink: 0;
}
.page-about .about-shape-block {
  width: var(--about-shape-size);
  height: calc(var(--about-shape-size) * 0.72);
  background: var(--primary);
  border-radius: 4px 24px 4px 24px;
  opacity: 0.25;
  transform: rotate(-6deg);
  position: absolute;
  left: 0;
  top: 10%;
}
.page-about .about-shape-ring {
  width: calc(var(--about-shape-size) * 0.8);
  height: calc(var(--about-shape-size) * 0.8);
  border: 3px solid var(--accent);
  border-radius: 50%;
  opacity: 0.15;
  position: absolute;
  right: 0;
  top: 0;
}
.page-about .about-shape-dot {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  position: absolute;
  bottom: 20%;
  left: 40%;
  opacity: 0.3;
}

/* ===== 服务亮点 ===== */
.page-about .about-highlights {
  padding-top: 3rem;
  padding-bottom: 3rem;
  background: var(--bg-card);
}
.page-about .about-highlights-header {
  margin-bottom: 2rem;
}
.page-about .about-highlights-intro {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0.5rem 0 0;
  max-width: 48ch;
}
.page-about .about-highlights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.page-about .about-highlight-card {
  background: rgba(13,27,42,0.55);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 1.75rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--transition-med), transform var(--transition-med);
  min-height: var(--about-card-minh);
}
.page-about .about-highlight-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
}
.page-about .about-highlight-icon-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}
.page-about .about-highlight-number {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 1;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.page-about .about-highlight-unit {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.page-about .about-highlight-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin: 0;
}
.page-about .about-highlight-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}
.page-about .about-highlights-fig {
  margin-top: 1rem;
}
.page-about .about-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-about .about-figure-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  display: block;
}
.page-about .about-figure-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ===== 区域专注 ===== */
.page-about .about-region {
  padding-top: 3.5rem;
  padding-bottom: 3rem;
}
.page-about .about-region-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .about-region-visual {
  width: 100%;
}
.page-about .about-region-media {
  position: relative;
  display: inline-block;
  max-width: 100%;
}
.page-about .about-region-img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border-light);
}
.page-about .about-region-hover-tip {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: rgba(255,107,53,0.88);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.08em;
  padding: 0.4rem 1rem 0.3rem;
  border-radius: 4px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background var(--transition-fast);
  cursor: default;
}
.page-about .about-region-hover-tip:hover,
.page-about .about-region-hover-tip:focus {
  background: var(--accent);
}
.page-about .about-region-text {
  flex: 1 1 100%;
}
.page-about .about-region-text .section-title {
  margin-bottom: 1.25rem;
}

/* ===== 信任声明 ===== */
.page-about .about-trust {
  padding-top: 2.5rem;
  padding-bottom: 3.5rem;
  border-top: 1px solid var(--border-light);
}
.page-about .about-trust-inner {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.page-about .about-trust-mark {
  width: 48px;
  height: 48px;
  margin: 0 auto 1.25rem;
  background: var(--accent-gradient);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  opacity: 0.3;
}
.page-about .about-trust-quote {
  margin: 0 0 1.5rem;
  padding: 0 1rem;
  border-left: 3px solid var(--accent);
  text-align: left;
}
.page-about .about-trust-quote p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
  font-style: normal;
}
.page-about .about-trust-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.6rem 0.8rem;
  font-size: 0.85rem;
}
.page-about .about-trust-link {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-about .about-trust-link:hover,
.page-about .about-trust-link:focus-visible {
  color: var(--accent-light);
  text-decoration: underline;
}
.page-about .about-trust-sep {
  color: var(--text-muted);
  user-select: none;
}

/* ===== 通用 section padding ===== */
.page-about .section-padding {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about {
    --about-hero-minh: 600px;
    --about-stat-gap: 1.5rem;
    --about-card-minh: 260px;
    --about-shape-size: 240px;
  }
  .page-about .breadcrumb {
    padding: 1.25rem 2rem 0;
  }
  .page-about .about-hero-content {
    padding: 4rem 2rem 3rem;
  }
  .page-about .about-hero-title {
    max-width: 6ch;
  }
  .page-about .about-hero-accent-block {
    width: 360px;
    height: 360px;
    right: -80px;
    top: 5%;
  }
  .page-about .about-position-grid {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
  }
  .page-about .about-position-text {
    flex: 1 1 55%;
  }
  .page-about .about-position-visual {
    flex: 1 1 40%;
    min-height: 280px;
  }
  .page-about .about-highlights-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-highlights-fig {
    display: flex;
    justify-content: center;
  }
  .page-about .about-figure-img {
    max-width: 100%;
  }
  .page-about .about-region-grid {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
  }
  .page-about .about-region-visual {
    flex: 1 1 48%;
  }
  .page-about .about-region-text {
    flex: 1 1 48%;
  }
  .page-about .section-padding {
    padding-left: 2rem;
    padding-right: 2rem;
  }
  .page-about .about-trust-quote {
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .page-about {
    --about-hero-minh: 680px;
  }
  .page-about .about-hero-content {
    padding: 5rem 2rem 3.5rem;
  }
  .page-about .about-hero-title {
    font-size: clamp(5rem, 8vw, 7.5rem);
  }
  .page-about .about-position-grid {
    gap: 4rem;
  }
  .page-about .about-region-grid {
    gap: 4rem;
  }
  .page-about .about-highlights-grid {
    gap: 2rem;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero-content,
  .page-about .breadcrumb {
    padding-left: calc((100% - var(--content-max)) / 2 + 2rem);
    padding-right: calc((100% - var(--content-max)) / 2 + 2rem);
  }
  .page-about .section-padding {
    padding-left: calc((100% - var(--content-max)) / 2 + 2rem);
    padding-right: calc((100% - var(--content-max)) / 2 + 2rem);
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-highlight-card:hover {
    transform: none;
  }
  .page-about .about-btn:hover {
    transform: none;
  }
}