.page-about {
  --about-hero-min-height: 420px;
  --about-section-gap: 48px;
  --about-grid-gap: 32px;
  --about-card-padding: 28px;
  --about-decor-size: 80px;
}

/* ===== 面包屑 ===== */
.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  padding-bottom: 12px;
  font-size: 0.85rem;
  color: var(--color-dark, #1A1A1A);
  opacity: 0.65;
}
.page-about .about-breadcrumb a {
  color: var(--color-primary, #0B1D3A);
  text-decoration: none;
  transition: opacity var(--transition-fast, 0.2s ease);
}
.page-about .about-breadcrumb a:hover {
  opacity: 0.7;
}
.page-about .about-breadcrumb-sep {
  color: var(--color-border, #E0E0E0);
  user-select: none;
}
.page-about .about-breadcrumb [aria-current="page"] {
  color: var(--color-primary, #0B1D3A);
  font-weight: 600;
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  min-height: var(--about-hero-min-height);
  background: var(--color-primary, #0B1D3A);
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-bottom: 32px;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 100%;
  background: var(--color-accent-orange, #FF6B35);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0% 100%);
  z-index: 1;
}
.page-about .about-hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background: rgba(255,255,255,0.04);
  clip-path: polygon(35% 0, 100% 0, 100% 100%, 15% 100%);
  z-index: 2;
}
.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 60%, rgba(255,107,53,0.12) 0%, transparent 60%);
  z-index: 0;
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 3;
  padding-top: 40px;
  padding-bottom: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}
.page-about .about-hero-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent-orange, #FF6B35);
  background: rgba(255,255,255,0.08);
  padding: 4px 12px;
  border-radius: 0;
  font-family: var(--font-mono, "Courier New", Courier, monospace);
}
.page-about .about-hero-title {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-white, #FFFFFF);
  margin: 0;
  max-width: 700px;
  letter-spacing: -0.02em;
}
.page-about .about-hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.78);
  max-width: 560px;
  margin: 4px 0 0;
  line-height: 1.5;
}
.page-about .about-hero-decor {
  width: 48px;
  height: 3px;
  background: var(--color-accent-orange, #FF6B35);
  margin-top: 8px;
}

/* ===== 章节通用 ===== */
.page-about .section {
  padding-top: var(--about-section-gap);
  padding-bottom: var(--about-section-gap);
}
.page-about .about-section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  position: relative;
}
.page-about .about-section-header .section-number {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-primary, #0B1D3A);
  opacity: 0.18;
  line-height: 1;
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  letter-spacing: -0.04em;
}
.page-about .about-section-header .section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary, #0B1D3A);
  margin: 0;
  line-height: 1.2;
  transition: transform var(--transition-med, 0.35s ease);
}
@media (hover: hover) {
  .page-about .about-section-header .section-title:hover {
    transform: scale(1.01);
  }
}
.page-about .about-section-rule {
  width: 100%;
  height: 2px;
  background: var(--color-border, #E0E0E0);
  margin-top: 4px;
  border: none;
}
.page-about .about-section-divider {
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary, #0B1D3A) 0%, var(--color-accent-orange, #FF6B35) 60%, var(--color-accent-green, #00C9A7) 100%);
  opacity: 0.3;
  margin-top: var(--about-section-gap);
}

/* ===== 品牌故事 ===== */
.page-about .about-story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-grid-gap);
  align-items: center;
}
.page-about .about-story-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-dark, #1A1A1A);
  margin: 0 0 16px;
}
.page-about .about-story-image {
  width: 100%;
}
.page-about .about-story-image .about-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 0;
  box-shadow: var(--shadow-card, 0 2px 12px rgba(0,0,0,0.06));
  display: block;
}

/* ===== 技术特色 ===== */
.page-about .about-tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-grid-gap);
  align-items: center;
}
.page-about .about-tech-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-dark, #1A1A1A);
  margin: 0 0 16px;
}
.page-about .about-tech-image {
  width: 100%;
}
.page-about .about-tech-image .about-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  box-shadow: var(--shadow-card, 0 2px 12px rgba(0,0,0,0.06));
  display: block;
  transition: transform var(--transition-med, 0.35s ease), box-shadow var(--transition-med, 0.35s ease);
}
@media (hover: hover) {
  .page-about .about-tech-image .about-img:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-stack, 0 4px 16px rgba(0,0,0,0.08));
  }
}
.page-about .about-tech-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}
.page-about .about-tech-card {
  padding: 20px 16px;
  background: var(--color-white, #FFFFFF);
  border-left: 3px solid var(--color-accent-orange, #FF6B35);
  transition: transform var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
  cursor: default;
}
.page-about .about-tech-card:nth-child(2) {
  border-left-color: var(--color-accent-green, #00C9A7);
}
.page-about .about-tech-card .tag {
  margin-bottom: 8px;
  display: inline-block;
}
.page-about .about-tech-card p {
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.5;
  color: var(--color-dark, #1A1A1A);
}
@media (hover: hover) {
  .page-about .about-tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-stack, 0 4px 16px rgba(0,0,0,0.1));
  }
  .page-about .about-tech-card:hover .tag {
    background: var(--color-primary, #0B1D3A);
    color: var(--color-white, #FFFFFF);
  }
}

/* ===== 团队与愿景 ===== */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-grid-gap);
  align-items: center;
}
.page-about .about-team-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-dark, #1A1A1A);
  margin: 0 0 16px;
}
.page-about .about-team-image {
  width: 100%;
}
.page-about .about-team-image .about-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  box-shadow: var(--shadow-card, 0 2px 12px rgba(0,0,0,0.06));
  display: block;
  transition: filter var(--transition-med, 0.35s ease);
}
@media (hover: hover) {
  .page-about .about-team-image .about-img:hover {
    filter: brightness(1.03);
  }
}

/* ===== 联系方式 ===== */
.page-about .about-contact-card {
  padding: var(--about-card-padding);
  background: var(--color-white, #FFFFFF);
  max-width: 720px;
  margin: 0 auto;
}
.page-about .about-contact-card > p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-dark, #1A1A1A);
  margin: 0 0 24px;
}
.page-about .about-contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}
.page-about .about-contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--color-dark, #1A1A1A);
}
.page-about .about-contact-item .tag {
  min-width: 56px;
  text-align: center;
  font-size: 0.75rem;
  background: var(--color-gray, #F4F4F4);
  color: var(--color-primary, #0B1D3A);
  border: 1px solid var(--color-border, #E0E0E0);
}
.page-about .about-contact-item a {
  color: var(--color-primary-light, #1C3A6E);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast, 0.2s ease);
}
.page-about .about-contact-item a:hover {
  color: var(--color-accent-orange, #FF6B35);
}
.page-about .about-contact-note {
  font-size: 0.85rem !important;
  color: var(--color-dark, #1A1A1A);
  opacity: 0.6;
  margin-bottom: 20px !important;
}

/* ===== 通用按钮 ===== */
.page-about .about-btn {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== 图片响应式 ===== */
.page-about .about-img {
  max-width: 100%;
  height: auto;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about {
    --about-hero-min-height: 520px;
    --about-section-gap: 72px;
    --about-grid-gap: 48px;
  }
  .page-about .about-hero-title {
    font-size: 3.8rem;
  }
  .page-about .about-hero-sub {
    font-size: 1.25rem;
  }
  .page-about .about-hero-inner {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .page-about .about-section-header .section-number {
    font-size: 4rem;
    opacity: 0.15;
  }
  .page-about .about-section-header .section-title {
    font-size: 2.2rem;
  }
  .page-about .about-story-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-story-content {
    order: 1;
    padding-right: 16px;
  }
  .page-about .about-story-image {
    order: 2;
  }
  .page-about .about-tech-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-tech-image {
    order: 1;
  }
  .page-about .about-tech-content {
    order: 2;
    padding-left: 16px;
  }
  .page-about .about-team-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-team-content {
    order: 1;
    padding-right: 16px;
  }
  .page-about .about-team-image {
    order: 2;
  }
  .page-about .about-contact-card {
    padding: 40px 48px;
  }
  .page-about .about-contact-info {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }
  .page-about .about-contact-item {
    flex: 1 1 180px;
  }
  .page-about .about-tech-cards {
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-title {
    font-size: 4.4rem;
  }
  .page-about .about-section-header .section-title {
    font-size: 2.6rem;
  }
}