.page-about {
  --about-gold: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
  padding-bottom: 40px;
}

/* 顶部档案封面 */
.page-about .about-hero {
  position: relative;
  padding: 36px 0 72px;
  background:
    radial-gradient(ellipse at 88% 8%, rgba(212, 175, 55, 0.14), transparent 52%),
    radial-gradient(ellipse at 8% 92%, rgba(0, 180, 216, 0.08), transparent 58%);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  margin-bottom: 28px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-muted);
}

.page-about .breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.page-about .breadcrumbs a:hover {
  color: var(--color-gold);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--color-gold);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  margin-top: 48px;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--color-gold);
}

.page-about .about-kicker::before {
  content: "";
  width: 36px;
  height: 1px;
  background: currentColor;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(42px, 8vw, 88px);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-about .about-hero-desc {
  max-width: 680px;
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about .about-hero-side {
  align-self: end;
  justify-self: start;
}

.page-about .about-dossier-tab {
  display: inline-block;
  padding: 12px 18px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--about-gold);
  color: var(--color-bg);
  box-shadow: var(--shadow-gold);
}

.page-about .about-dossier-tab span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.2em;
  opacity: 0.75;
}

.page-about .about-dossier-tab strong {
  display: block;
  font-size: 16px;
  letter-spacing: 0.06em;
}

.page-about .about-hero-meta {
  margin-top: 0;
  padding: 16px 18px 18px;
  background: rgba(17, 24, 39, 0.65);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

/* 档案章节公共结构 */
.page-about .about-section {
  position: relative;
  padding: 72px 0;
}

.page-about .about-section-dark {
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.38), rgba(17, 24, 39, 0.9));
}

.page-about .about-section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(212, 175, 55, 0.08) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

.page-about .about-section-head {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 42px;
  padding-right: 24px;
}

.page-about .about-number {
  font-size: 64px;
  font-weight: 100;
  line-height: 0.82;
  background: var(--about-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-title {
  margin: 0;
  font-size: clamp(24px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .about-vertical-label {
  writing-mode: vertical-rl;
  margin-left: auto;
  margin-bottom: 4px;
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--color-gold);
  opacity: 0.75;
}

/* 01 品牌缘起 */
.page-about .about-origin-grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-about .about-origin-text p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about .about-origin-text p:first-child {
  font-size: 18px;
  color: var(--color-text);
}

.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  width: 100%;
  max-width: 800px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.page-about .about-figure figcaption,
.page-about .about-culture-figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

/* 02 发展里程碑 */
.page-about .about-timeline-wrap {
  display: grid;
  gap: 44px;
  align-items: start;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 20px;
  border-left: 2px dashed rgba(212, 175, 55, 0.3);
}

.page-about .about-milestone {
  position: relative;
  padding: 0 0 46px 20px;
}

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

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 5px rgba(212, 175, 55, 0.1);
}

.page-about .about-year {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 10px;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  background: rgba(212, 175, 55, 0.12);
  border-radius: var(--radius-pill);
}

.page-about .about-milestone h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-milestone p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-about .about-timeline-figure {
  margin: 0;
}

.page-about .about-timeline-figure img {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* 03 服务范围与覆盖 */
.page-about .about-coverage-intro {
  max-width: 660px;
  margin: 0 0 36px;
  font-size: 18px;
  line-height: 1.9;
  color: var(--color-text);
}

.page-about .about-service-list {
  display: grid;
  gap: 16px;
  margin-bottom: 36px;
}

.page-about .about-service-item {
  position: relative;
  padding: 24px 22px 22px;
  background: linear-gradient(105deg, rgba(212, 175, 55, 0.1), rgba(255, 255, 255, 0.02) 58%);
  border-radius: var(--radius-md);
}

.page-about .about-service-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 4px;
  border-radius: 4px;
  background: var(--about-gold);
}

.page-about .about-service-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--color-orange);
  background: rgba(255, 77, 0, 0.12);
  border-radius: var(--radius-pill);
}

.page-about .about-service-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-service-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-about .about-coverage-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  background: rgba(0, 180, 216, 0.06);
  border-radius: var(--radius-md);
}

.page-about .about-coverage-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

/* 04 资质与合规 */
.page-about .about-credential-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .about-credential {
  padding: 24px 22px;
  background: rgba(255, 255, 255, 0.025);
  border-radius: var(--radius-md);
  transition: transform var(--transition), background var(--transition);
}

.page-about .about-credential:hover {
  transform: scale(1.03);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-credential-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: rgba(212, 175, 55, 0.14);
  color: var(--color-gold);
}

.page-about .about-credential h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-credential p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about .about-icp {
  display: grid;
  gap: 18px;
  padding: 26px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), transparent);
}

.page-about .about-icp-text h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-icp-text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-about .about-icp-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-self: center;
}

.page-about .about-icp-links a {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  transition: border-color var(--transition), color var(--transition);
}

.page-about .about-icp-links a:hover {
  color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}

/* 05 团队与文化 */
.page-about .about-culture-grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-about .about-culture-text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about .about-culture-text p:first-child {
  font-size: 18px;
  color: var(--color-text);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-cta-links a {
  display: inline-flex;
  align-items: center;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.page-about .about-cta-links a:first-child {
  background: var(--about-gold);
  color: var(--color-bg);
  font-weight: 700;
  box-shadow: var(--shadow-gold);
}

.page-about .about-cta-links a:last-child {
  color: var(--color-gold);
  background: rgba(212, 175, 55, 0.08);
}

.page-about .about-culture-figure {
  margin: 0;
}

.page-about .about-culture-figure img {
  width: 100%;
  max-width: 600px;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* 响应式 */
@media (min-width: 768px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1fr 240px;
    gap: 48px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  }

  .page-about .about-service-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-credential-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-icp {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .page-about .about-culture-grid {
    grid-template-columns: 1fr 0.85fr;
  }
}

@media (min-width: 992px) {
  .page-about .about-service-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-credential-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}