.page-about {
  position: relative;
  background: var(--bg);
  color: var(--text);
}

.page-about .content-shell {
  position: relative;
  z-index: 1;
  padding-top: 32px;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 36px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumbs a {
  color: var(--blue);
  text-decoration: none;
  transition: color .2s;
}

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

.page-about .breadcrumbs-sep {
  color: var(--border);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

/* 档案目录卡 */
.page-about .about-index-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 5px solid var(--orange);
  border-radius: 0 16px 16px 0;
  padding: 24px 20px;
  box-shadow: 0 12px 28px rgba(11, 60, 93, .05);
}

.page-about .about-index-card::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 14px;
  width: 42px;
  height: 42px;
  border-radius: 60% 40% 55% 45% / 50% 60% 40% 50%;
  background: rgba(241, 143, 1, .14);
  pointer-events: none;
}

.page-about .about-index-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 18px;
}

.page-about .about-index-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-index-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
  transition: background-color .2s, color .2s, transform .2s;
}

.page-about .about-index-list a:hover {
  background: var(--section);
  color: var(--orange);
  transform: translateX(4px);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--blue);
  min-width: 24px;
}

.page-about .about-index-note {
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  display: grid;
  gap: 6px;
}

.page-about .about-index-note p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-index-note .about-index-code {
  color: var(--orange);
  letter-spacing: .08em;
}

/* 封面头 */
.page-about .about-cover {
  position: relative;
  margin-bottom: 56px;
  padding-bottom: 32px;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  right: -10px;
  top: 72px;
  width: 200px;
  height: 200px;
  z-index: 0;
  border-radius: 40% 60% 65% 35% / 55% 45% 55% 45%;
  background: var(--section);
  display: none;
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  display: block;
  margin-top: 36px;
  height: 6px;
  border-radius: 3px;
  background: repeating-linear-gradient(115deg, var(--orange) 0 12px, var(--navy) 12px 24px, var(--blue) 24px 36px);
}

.page-about .about-cover-kicker,
.page-about .about-cover h1,
.page-about .about-cover-lead {
  position: relative;
  z-index: 1;
}

.page-about .about-cover-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--blue);
}

.page-about .about-cover-dot {
  width: 28px;
  height: 8px;
  border-radius: 4px;
  background: var(--orange);
}

.page-about .about-cover h1 {
  max-width: 900px;
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 900;
  line-height: 1.22;
  color: var(--navy);
}

.page-about .about-cover-lead {
  max-width: 780px;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cover-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cover-meta-item {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
}

/* 档案章节通用 */
.page-about .about-sec {
  scroll-margin-top: 96px;
  margin-bottom: 64px;
}

.page-about .about-sec-head {
  margin-bottom: 28px;
}

.page-about .about-sec-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 900;
  color: var(--navy);
}

.page-about .section-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--blue);
}

.page-about .section-eyebrow-dot {
  display: inline-block;
  width: 22px;
  height: 6px;
  border-radius: 3px;
  background: var(--orange);
}

/* 关于与价值观 */
.page-about .about-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.page-about .about-intro-text p {
  margin: 0 0 16px;
  line-height: 1.75;
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-intro-media,
.page-about .about-milestone-media,
.page-about .about-service-media {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 18px 44px rgba(11, 60, 93, .1);
}

.page-about .about-intro-media img,
.page-about .about-milestone-media img,
.page-about .about-service-media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-value-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-value-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  transition: background-color .2s, border-color .2s, transform .2s;
}

.page-about .about-value-card:hover {
  background: var(--section);
  border-color: var(--blue);
  transform: translateY(-2px);
}

.page-about .about-value-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--orange);
}

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

/* 发展里程碑时间轴 */
.page-about .about-milestone-track {
  position: relative;
  margin: 12px 0 36px;
}

.page-about .about-milestone-svg {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 42px;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-milestone-line {
  stroke: var(--orange);
  stroke-width: 2.5;
}

.page-about .about-milestone-glow {
  stroke: var(--amber);
  stroke-width: 7;
  opacity: .2;
}

.page-about .about-milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-milestone-item {
  position: relative;
  padding: 8px 0 24px 54px;
}

.page-about .about-milestone-item:hover .about-milestone-content {
  background: var(--section);
  border-color: var(--blue);
}

.page-about .about-milestone-marker {
  position: absolute;
  left: 19px;
  top: 16px;
  width: 22px;
  height: 22px;
  z-index: 1;
}

.page-about .about-milestone-dot {
  display: block;
  width: 13px;
  height: 13px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--orange);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--navy), 0 0 14px rgba(241, 143, 1, .35);
}

.page-about .about-milestone-content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 22px;
  transition: background-color .2s, border-color .2s;
}

.page-about .about-milestone-code {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--blue);
}

.page-about .about-milestone-content h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--navy);
}

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

/* 内容与服务体系 */
.page-about .about-service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.page-about .about-service-text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-service-text a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color .2s;
}

.page-about .about-service-text a:hover {
  color: var(--orange);
}

.page-about .about-service-stat {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 26px;
  background: var(--navy);
  border-radius: 16px;
  padding: 26px 24px;
}

.page-about .about-stat-item {
  display: grid;
  gap: 6px;
}

.page-about .about-stat-num {
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, .78);
}

/* 资质与备案 */
.page-about .about-license-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 30px 26px;
  box-shadow: 0 18px 44px rgba(11, 60, 93, .07);
}

.page-about .about-license-badge {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 3px var(--navy), inset 0 0 0 5px var(--amber);
}

.page-about .about-license-mark {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .08em;
}

.page-about .about-license-detail {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-license-detail div {
  display: grid;
  gap: 4px;
}

.page-about .about-license-detail dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-license-detail dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-license-note {
  margin: 24px 0 0;
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  background: var(--section);
  border-left: 4px solid var(--orange);
  border-radius: 0 10px 10px 0;
}

/* 联系我们 */
.page-about .about-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-contact-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-contact-list li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--border);
}

.page-about .about-contact-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--blue);
}

.page-about .about-contact-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-about .about-contact-tip {
  margin: 0;
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  background: var(--section);
  border-radius: 12px;
}

.page-about .about-contact-cta {
  display: grid;
  gap: 16px;
  align-content: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
}

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

.page-about .about-contact-cta .btn-primary,
.page-about .about-contact-cta .btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.page-about .btn-arrow {
  display: inline-block;
  margin-left: 6px;
  transition: transform .2s;
}

.page-about .btn-primary:hover .btn-arrow,
.page-about .btn-ghost:hover .btn-arrow {
  transform: translateX(4px);
}

/* 响应式 */
@media (min-width: 768px) {
  .page-about .about-cover h1 {
    font-size: 40px;
  }

  .page-about .about-cover::before {
    display: block;
  }

  .page-about .about-intro-grid {
    grid-template-columns: 1fr 1.15fr;
  }

  .page-about .about-value-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-service-stat {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-license-card {
    flex-direction: row;
    align-items: center;
  }

  .page-about .about-license-detail {
    flex: 1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-contact-grid {
    grid-template-columns: 1.1fr .9fr;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
  }

  .page-about .about-index-card {
    padding: 28px 22px;
  }

  .page-about .about-cover h1 {
    font-size: 46px;
  }

  .page-about .about-service-grid {
    grid-template-columns: 1.1fr .9fr;
  }
}