.page-about {
  --about-gold-line: rgba(198, 161, 91, 0.32);
  --about-gold-soft: rgba(198, 161, 91, 0.12);
  --about-dark-panel: linear-gradient(128deg, #1F1C18 0%, #2E2A24 42%, #3A4C40 100%);
  --about-deep-panel: linear-gradient(118deg, #151C17 0%, #1F2E24 48%, #24362B 100%);
  --about-cream-text: #F5F0E6;
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 24px 20px 0;
  max-width: 1200px;
  margin: 0 auto;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: 'Inter', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
}
.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--sand);
  margin-right: 8px;
}
.page-about .breadcrumb__link {
  color: var(--moss);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-about .breadcrumb__link:hover {
  color: var(--terra);
}
.page-about .breadcrumb__current {
  color: var(--rock);
  font-weight: 600;
}

/* 页面头部 */
.page-about .page-mast {
  position: relative;
  margin: 24px 0 0;
  padding: 56px 20px 64px;
  background: var(--header-bg);
  color: var(--cream);
  overflow: hidden;
}
.page-about .page-mast::before {
  content: '2012';
  position: absolute;
  right: 16px;
  bottom: -16px;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 148px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(198, 161, 91, 0.16);
  user-select: none;
  pointer-events: none;
}
.page-about .page-mast::after {
  content: '';
  position: absolute;
  top: -70px;
  right: -40px;
  width: 220px;
  height: 320px;
  background: linear-gradient(135deg, transparent 32%, rgba(198, 161, 91, 0.16) 100%);
  transform: rotate(18deg);
  border-radius: 40px;
  pointer-events: none;
}
.page-about .page-mast__kicker {
  display: inline-block;
  position: relative;
  z-index: 1;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-bright);
  border: 1px solid rgba(198, 161, 91, 0.32);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  background: rgba(198, 161, 91, 0.06);
}
.page-about .page-mast__title {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 18px 0 16px;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 34px;
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cream);
}
.page-about .page-mast__lede {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.86);
}
.page-about .page-mast__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 公司简介 */
.page-about .company-profile {
  padding: 64px 20px;
}
.page-about .company-profile__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .company-profile__content .chapter {
  margin-bottom: 20px;
}
.page-about .company-profile__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}
.page-about .company-profile__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about .company-profile__visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 28px 56px -32px rgba(45, 42, 38, 0.5);
}
.page-about .company-profile__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(198, 161, 91, 0.08) 0%, transparent 48%, rgba(45, 42, 38, 0.12) 100%);
  pointer-events: none;
}
.page-about .company-profile__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 里程碑 */
.page-about .milestones {
  background: var(--oat);
  padding: 64px 20px;
}
.page-about .milestones__layout {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 40px;
  align-items: start;
}
.page-about .milestones__main .chapter {
  margin-bottom: 32px;
}
.page-about .timeline {
  position: relative;
  padding-left: 26px;
}
.page-about .timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold-bright) 0%, var(--moss) 100%);
  border-radius: 2px;
}
.page-about .timeline__item {
  position: relative;
  padding-bottom: 28px;
}
.page-about .timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .timeline__dot {
  position: absolute;
  left: -26px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--oat);
  box-shadow: 0 0 0 2px var(--gold);
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.page-about .timeline__year {
  display: inline-block;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--forest);
  line-height: 1.2;
  margin-bottom: 8px;
}
.page-about .timeline__card {
  background: var(--card-bg);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 18px 20px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.page-about .timeline__card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
}
.page-about .timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--rock);
}
.page-about .timeline__item:hover .timeline__dot {
  background: var(--terra);
  box-shadow: 0 0 0 2px var(--terra);
  transform: scale(1.15);
}
.page-about .timeline__item:hover .timeline__card {
  border-left-color: var(--terra);
  box-shadow: 0 22px 48px -28px rgba(45, 42, 38, 0.48);
  transform: translateY(-2px);
}

/* 数字仪表板 */
.page-about .milestones__aside {
  background: var(--about-dark-panel);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  gap: 20px;
  box-shadow: 0 30px 60px -34px rgba(21, 28, 23, 0.7);
}
.page-about .dashboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-about .dashboard__item {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(198, 161, 91, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 14px;
  text-align: center;
  transition: background 0.25s ease, border-color 0.25s ease;
}
.page-about .dashboard__item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(198, 161, 91, 0.4);
}
.page-about .dashboard__num {
  display: block;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold-bright);
}
.page-about .dashboard__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(245, 240, 230, 0.7);
}
.page-about .milestones__img {
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .milestones__img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 资质认证 */
.page-about .certifications {
  background: var(--about-deep-panel);
  padding: 64px 20px;
}
.page-about .certifications__layout {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 36px;
  align-items: center;
}
.page-about .certifications .chapter__title,
.page-about .legacy .chapter__title {
  color: var(--cream);
}
.page-about .certifications .chapter__lede,
.page-about .legacy .chapter__lede {
  color: rgba(245, 240, 230, 0.75);
}
.page-about .cert-list {
  list-style: none;
  padding: 0;
  margin: 28px 0 24px;
  display: grid;
  gap: 14px;
}
.page-about .cert-list__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(198, 161, 91, 0.22);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: background 0.25s ease, transform 0.25s ease;
}
.page-about .cert-list__item:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-2px);
}
.page-about .cert-list__info h3 {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  color: var(--cream);
}
.page-about .cert-list__info p {
  margin: 0;
  font-size: 14px;
  color: rgba(245, 240, 230, 0.66);
}
.page-about .certifications__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.6);
  max-width: 560px;
}
.page-about .certifications__img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 48px -28px rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(198, 161, 91, 0.18);
}
.page-about .certifications__img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 服务范围 */
.page-about .services {
  padding: 64px 20px;
}
.page-about .services__inner {
  max-width: 1200px;
  margin: 0 auto;
}
.page-about .services .chapter {
  margin-bottom: 32px;
}
.page-about .services__grid {
  display: grid;
  gap: 18px;
}
.page-about .service-card {
  position: relative;
  background: var(--oat);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.page-about .service-card:hover {
  box-shadow: 0 22px 44px -30px rgba(45, 42, 38, 0.45);
  border-color: var(--gold);
}
.page-about .service-card__index {
  display: inline-block;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 14px;
}
.page-about .service-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
}
.page-about .service-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}
.page-about .services__foot {
  margin-top: 28px;
  text-align: center;
}

/* 旧版服务 */
.page-about .legacy {
  background: linear-gradient(112deg, #151C17 0%, #1F2E24 52%, #172119 100%);
  padding: 64px 20px;
}
.page-about .legacy__inner {
  max-width: 1100px;
  margin: 0 auto;
}
.page-about .legacy .chapter {
  margin-bottom: 24px;
}
.page-about .legacy__grid {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}
.page-about .legacy__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.82);
}
.page-about .legacy__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 联系条 */
.page-about .connect-strip {
  padding: 48px 20px;
  background: var(--cream);
}
.page-about .connect-strip__inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}
.page-about .connect-strip__inner p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}
.page-about .connect-strip__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* 共享类微调 */
.page-about .chapter {
  margin-bottom: 0;
}
.page-about .chapter__index {
  display: block;
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 10px;
}
.page-about .chapter__title {
  font-size: 30px;
  line-height: 1.2;
  margin: 0 0 10px;
  color: var(--ink);
  font-family: 'Playfair Display', Georgia, 'Songti SC', 'SimSun', serif;
}
.page-about .chapter__lede {
  font-size: 15px;
  line-height: 1.7;
  color: var(--rock);
  margin: 0;
  max-width: 640px;
}
.page-about .visual {
  display: block;
  position: relative;
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-about .page-mast {
    padding: 76px 40px 88px;
  }
  .page-about .page-mast__title {
    font-size: 52px;
  }
  .page-about .page-mast__lede {
    font-size: 17px;
  }
  .page-about .company-profile__grid {
    grid-template-columns: 6fr 5fr;
    gap: 56px;
  }
  .page-about .milestones__layout {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
  }
  .page-about .milestones__aside {
    position: sticky;
    top: 24px;
  }
  .page-about .certifications__layout {
    grid-template-columns: 6fr 5fr;
    gap: 56px;
  }
  .page-about .dashboard {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .services__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .service-card {
    padding: 32px 28px;
  }
  .page-about .legacy__grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}

@media (min-width: 600px) {
  .page-about .dashboard {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-about .page-mast {
    border-radius: 0 0 32px 32px;
  }
}