.page-about {
  --about-rule: 1px solid rgba(176, 184, 196, 0.32);
  --about-space: 56px;
  background: var(--color-white);
  color: var(--color-text-dark);
  line-height: 1.7;
}

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

/* ===== 刊头区域 ===== */
.page-about .about-hero {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 32px 0 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -40px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.2), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .about-kicker {
  font-size: var(--small-size);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 8vw, var(--h1-size));
  line-height: 1.08;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin-bottom: 20px;
}

.page-about .about-hero-intro {
  font-size: var(--body-size);
  color: rgba(255, 255, 255, 0.88);
  max-width: 46ch;
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero-visual {
  position: relative;
  margin-bottom: 0;
}

.page-about .about-hero-visual .visual-frame {
  margin-bottom: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .about-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 66%, rgba(255, 215, 0, 0.28) 66%, rgba(255, 215, 0, 0.28) 78%, transparent 78%);
  border-radius: var(--radius);
  pointer-events: none;
}

.page-about .about-hero-visual .visual-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  color: var(--color-white);
  background: rgba(10, 30, 60, 0.72);
  padding: 8px 14px;
  font-size: var(--small-size);
  border-radius: var(--radius-sm) 0 0 0;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(176, 184, 196, 0.35);
  border: 1px solid rgba(176, 184, 196, 0.35);
  border-radius: var(--radius);
  margin-top: 36px;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.page-about .about-hero-fact {
  padding: 18px 20px;
  background: var(--color-primary);
}

.page-about .about-hero-fact .data-label {
  color: var(--color-text-muted);
  font-size: var(--small-size);
  font-weight: 500;
}

.page-about .about-hero-fact .data-value {
  color: var(--color-accent);
  font-family: var(--font-number);
  font-size: 1.4rem;
  line-height: 1.3;
  margin-top: 4px;
}

/* ===== 目录区 ===== */
.page-about .about-toc {
  padding: 24px 0;
  background: var(--color-white);
  border-bottom: var(--about-rule);
}

.page-about .about-toc .content-map-group-title {
  font-family: var(--font-body);
  font-size: var(--small-size);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.page-about .about-toc .content-map-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 0;
  padding: 0;
}

.page-about .about-toc .content-map-link {
  display: inline-block;
  font-family: var(--font-number);
  font-size: 1rem;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
  transition: border-color var(--speed-normal) ease, color var(--speed-normal) ease;
}

.page-about .about-toc .content-map-link:hover,
.page-about .about-toc .content-map-link:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-secondary);
  outline: none;
}

/* ===== 章节标题 ===== */
.page-about .about-section-header {
  margin-bottom: 36px;
  max-width: 720px;
  position: relative;
}

.page-about .about-section-header .section-number {
  display: block;
  font-family: var(--font-number);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.page-about .about-section-header .section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, var(--h2-size));
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.page-about .about-section-header .section-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ===== 我们是谁 ===== */
.page-about .about-identity {
  position: relative;
  padding: var(--about-space) 0;
}

.page-about .about-identity::before {
  content: "01";
  position: absolute;
  right: 18px;
  top: 36px;
  font-family: var(--font-heading);
  font-size: clamp(5rem, 12vw, 9rem);
  line-height: 1;
  color: rgba(10, 30, 60, 0.05);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-identity-grid {
  display: grid;
  gap: 40px;
}

.page-about .about-identity-main {
  font-size: 1.05rem;
}

.page-about .about-identity-main p {
  margin-bottom: 16px;
}

.page-about .about-identity-lead {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.page-about .about-identity-points {
  margin-top: 28px;
  border-top: var(--about-rule);
}

.page-about .about-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-point-num {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-accent-secondary);
  background: var(--color-white);
  border: 1px solid rgba(255, 107, 53, 0.4);
  border-radius: 999px;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.page-about .about-point-text {
  margin: 0;
  color: var(--color-text-dark);
}

.page-about .about-identity-aside {
  display: grid;
  gap: 24px;
  align-content: start;
}

.page-about .about-mission-card {
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.page-about .about-mission-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.35), transparent 70%);
}

.page-about .about-mission-card .data-tag {
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: 999px;
  font-family: var(--font-number);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 5px 12px;
}

.page-about .about-mission-text {
  margin: 16px 0 0;
  font-size: 1.15rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.page-about .about-stats-card {
  background: var(--color-white);
  border: 1px solid rgba(176, 184, 196, 0.45);
  border-radius: var(--radius);
  padding: 8px 20px;
  box-shadow: 0 8px 24px rgba(10, 30, 60, 0.06);
}

.page-about .about-stats-card .data-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-stats-card .data-list-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-stats-card .data-list-row:last-child {
  border-bottom: 0;
}

.page-about .about-stats-card .data-label {
  color: var(--color-text-muted);
}

.page-about .about-stats-card .data-value {
  font-family: var(--font-number);
  font-weight: 700;
  color: var(--color-primary);
}

/* ===== 时间线 ===== */
.page-about .about-timeline-section {
  padding: var(--about-space) 0;
}

.page-about .about-timeline {
  position: relative;
  margin: 40px 0 0;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 32px 28px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(176, 184, 196, 0.35);
}

.page-about .about-timeline-item:first-child::before {
  top: 12px;
}

.page-about .about-timeline-item:last-child::before {
  height: 24px;
}

.page-about .about-timeline-head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-about .about-timeline-dot {
  position: absolute;
  left: -28px;
  top: 16px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-primary-light);
  box-shadow: 0 0 0 2px var(--color-accent);
  transform: translateX(0);
}

.page-about .about-timeline-year {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  line-height: 1.1;
  color: var(--color-accent);
  letter-spacing: 0.03em;
}

.page-about .about-timeline-card {
  background: var(--color-white);
  color: var(--color-text-dark);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-left: 4px;
  transition: transform var(--speed-normal) ease, box-shadow var(--speed-normal) ease;
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-body);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 8px;
}

.page-about .about-timeline-card p {
  margin: 0;
  font-size: 1rem;
  color: var(--color-text-dark);
}

.page-about .about-timeline-item:hover .about-timeline-card,
.page-about .about-timeline-item:focus-within .about-timeline-card {
  transform: translateX(4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.24);
}

.page-about .about-timeline-figure {
  margin: 48px 0 0;
}

.page-about .about-timeline-figure .visual-frame {
  margin-bottom: 8px;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .about-timeline-figure .visual-caption {
  color: var(--color-text-muted);
  font-size: var(--small-size);
}

/* ===== 服务能力 ===== */
.page-about .about-capabilities-section {
  padding: var(--about-space) 0;
}

.page-about .about-capability-grid {
  display: grid;
  gap: 20px;
}

.page-about .about-capability-card {
  padding: 26px;
  margin: 0;
  transition: transform var(--speed-normal) ease, box-shadow var(--speed-normal) ease;
}

.page-about .about-capability-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 14px 0 10px;
}

.page-about .about-capability-card p {
  margin: 0;
  font-size: 1rem;
  color: var(--color-text-dark);
}

.page-about .about-capability-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(10, 30, 60, 0.1);
}

.page-about .about-capability-bottom {
  display: grid;
  gap: 28px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: var(--about-rule);
}

.page-about .about-capability-content h3 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 12px;
}

.page-about .about-capability-content p {
  font-size: 1.05rem;
  color: var(--color-text-dark);
  margin: 0 0 16px;
}

.page-about .about-capability-contact {
  color: var(--color-text-muted) !important;
  font-size: 0.95rem !important;
}

.page-about .about-inline-link {
  color: var(--color-accent-secondary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--speed-normal) ease;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--color-primary);
  outline: none;
}

.page-about .about-capability-content .btn {
  margin-top: 8px;
}

.page-about .about-capability-visual .visual-frame {
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .about-capability-visual .visual-caption {
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: var(--small-size);
}

/* ===== 资质与荣誉 ===== */
.page-about .about-honors-section {
  padding: var(--about-space) 0;
  position: relative;
}

.page-about .about-honors-section::before {
  content: "04";
  position: absolute;
  left: 16px;
  bottom: 28px;
  font-family: var(--font-heading);
  font-size: clamp(5rem, 12vw, 9rem);
  line-height: 1;
  color: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

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

.page-about .about-honors-grid {
  display: grid;
  gap: 20px;
}

.page-about .about-honor-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(176, 184, 196, 0.25);
  border-radius: var(--radius);
  padding: 30px;
  transition: border-color var(--speed-normal) ease, background var(--speed-normal) ease;
}

.page-about .about-honor-item:hover {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-honor-item .data-tag {
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: 999px;
  font-family: var(--font-number);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 5px 12px;
  display: inline-block;
}

.page-about .about-honor-item h3 {
  font-family: var(--font-body);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-white);
  margin: 16px 0 10px;
}

.page-about .about-honor-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1rem;
}

/* ===== 结语 ===== */
.page-about .about-closing {
  background: linear-gradient(135deg, var(--color-accent) 0%, #FFC400 100%);
  color: var(--color-primary);
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-closing::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.28);
}

.page-about .about-closing-inner {
  max-width: 640px;
  position: relative;
  z-index: 1;
}

.page-about .about-closing-kicker {
  font-family: var(--font-number);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 10px;
  opacity: 0.75;
}

.page-about .about-closing h2 {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 7vw, var(--h2-size));
  line-height: 1.12;
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-about .about-closing-text {
  font-size: 1.15rem;
  margin: 0 0 28px;
  color: rgba(10, 30, 60, 0.86);
}

.page-about .about-closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-closing .btn-accent {
  background: var(--color-primary);
  color: var(--color-white);
}

.page-about .about-closing .btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-about .about-closing .btn-outline:hover,
.page-about .about-closing .btn-outline:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ===== 响应式增强 ===== */
@media (min-width: 640px) {
  .page-about {
    --about-space: 72px;
  }

  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

  .page-about .about-capability-bottom {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 56px;
    margin-top: 36px;
  }

  .page-about .about-hero-facts {
    margin-top: 52px;
  }

  .page-about .about-identity-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .about-identity-aside {
    border-left: 1px solid rgba(10, 30, 60, 0.12);
    padding-left: 32px;
  }

  .page-about .about-timeline-item {
    padding-left: 36px;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    padding-bottom: 40px;
  }

  .page-about .about-timeline-dot {
    left: -36px;
    top: 8px;
  }

  .page-about .about-timeline-head {
    justify-content: flex-end;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .about-timeline-year {
    font-size: 2.2rem;
  }

  .page-about .about-timeline-card {
    margin-left: 0;
  }

  .page-about .about-timeline-item::before {
    left: 7px;
  }

  .page-about .about-capability-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 44px;
  }

  .page-about .about-hero-title {
    letter-spacing: 0.02em;
  }

  .page-about .about-hero-fact .data-value {
    font-size: 1.6rem;
  }

  .page-about .about-section-header .section-title {
    margin-bottom: 16px;
  }

  .page-about .about-timeline-card {
    padding: 26px 30px;
  }
}