.page-about {
  background: #0B0E14;
  color: #E8ECF1;
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

.page-about .container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-text-muted);
  padding-top: calc(var(--header-h) + 28px);
}

.page-about .breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .crumb-sep {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.page-about .section {
  position: relative;
  padding: 64px 0;
}

.page-about .section-head {
  margin-bottom: 40px;
}

.page-about .section-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-left: 3px solid var(--color-accent);
  background: linear-gradient(90deg, rgba(0, 194, 255, 0.14), transparent 70%);
  margin-bottom: 14px;
}

.page-about .section-index::after {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  opacity: 0.5;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-text);
}

.page-about h1 {
  font-size: clamp(34px, 6vw, 62px);
  margin: 0 0 8px;
}

.page-about h2 {
  font-size: clamp(26px, 4.2vw, 42px);
  margin: 0 0 12px;
}

.page-about h3 {
  font-size: 18px;
  margin: 0 0 10px;
}

.page-about .section-desc {
  max-width: 640px;
  font-size: 16px;
  color: var(--color-text-muted);
}

/* ===== 01 品牌故事 ===== */
.page-about .story-hero {
  padding-top: 48px;
  overflow: hidden;
}

.page-about .story-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent 55%, rgba(0, 194, 255, 0.08) 55%);
  clip-path: polygon(100% 0, 100% 100%, 30% 100%);
  pointer-events: none;
}

.page-about .story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.page-about .profile-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.page-about .profile-code {
  color: var(--color-accent);
}

.page-about .story-subtitle {
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--color-accent-alt);
  letter-spacing: 0.08em;
  margin: 0 0 24px;
}

.page-about .story-lead {
  max-width: 560px;
  font-size: 17px;
  border-left: 3px solid var(--color-accent-alt);
  padding-left: 20px;
  margin: 0 0 28px;
}

.page-about .principle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 28px;
}

.page-about .principle-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  background: rgba(31, 42, 68, 0.35);
}

.page-about .principle-num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-accent);
}

.page-about .principle-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .story-detail {
  max-width: 560px;
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 12px 0 0;
}

.page-about .story-media {
  position: relative;
}

.page-about .media-frame {
  position: relative;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  padding: 14px 14px 40px;
  transform: rotate(1.1deg);
  box-shadow: 12px 12px 0 rgba(0, 194, 255, 0.07);
}

.page-about .media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 62%, rgba(0, 194, 255, 0.1) 62%);
  pointer-events: none;
}

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

.page-about .media-caption {
  position: absolute;
  bottom: 10px;
  left: 14px;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ===== 02 发展里程碑 ===== */
.page-about .milestone-section {
  background: linear-gradient(180deg, #0B0E14 0%, rgba(31, 42, 68, 0.6) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-about .milestone-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
}

.page-about .timeline-track {
  position: relative;
}

.page-about .timeline-entry {
  position: relative;
  margin-left: 22px;
  padding: 0 0 28px 24px;
  border-left: 2px solid var(--color-border);
}

.page-about .timeline-entry:last-child {
  border-left-color: transparent;
}

.page-about .timeline-dot {
  position: absolute;
  left: -9px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.45);
}

.page-about .timeline-entry:nth-child(odd) .timeline-dot {
  border-color: var(--color-accent-alt);
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.4);
}

.page-about .timeline-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 0;
  background: transparent;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  color: var(--color-text);
  cursor: pointer;
}

.page-about .timeline-trigger:hover .timeline-heading {
  color: var(--color-accent);
}

.page-about .timeline-year {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: rgba(0, 194, 255, 0.12);
  border: 1px solid rgba(0, 194, 255, 0.2);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-about .timeline-heading {
  flex: 1;
  transition: color 0.2s ease;
}

.page-about .timeline-icon {
  font-family: var(--font-data);
  font-size: 18px;
  color: var(--color-accent-alt);
  transition: transform 0.25s ease;
}

.page-about .timeline-entry[data-open="true"] .timeline-icon {
  transform: rotate(45deg);
}

.page-about .timeline-entry[data-open="true"] .accordion-panel {
  max-height: none;
}

.page-about .timeline-entry .accordion-panel {
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.page-about .timeline-inner p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.page-about .chart-card {
  position: relative;
  background: linear-gradient(160deg, var(--color-bg-elev), #151d2e);
  border: 1px solid var(--color-border);
  padding: 32px 24px 24px;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
  transform: rotate(0.6deg);
}

.page-about .archive-tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: #0B0E14;
  background: var(--color-accent);
  padding: 4px 10px;
  margin-bottom: 16px;
  transform: rotate(-2deg);
}

.page-about .chart-img-wrap {
  border: 1px solid var(--color-border);
  background: #0B0E14;
  margin: 16px 0 20px;
  overflow: hidden;
}

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

.page-about .growth-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .growth-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 13px;
}

.page-about .growth-year {
  width: 42px;
  font-family: var(--font-data);
  color: var(--color-accent);
}

.page-about .growth-progress {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
}

.page-about .growth-bar {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-data));
}

.page-about .growth-stage-0 {
  width: 16%;
}

.page-about .growth-stage-1 {
  width: 30%;
}

.page-about .growth-stage-2 {
  width: 60%;
}

.page-about .growth-stage-3 {
  width: 100%;
}

.page-about .growth-num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ===== 03 数据与能力 ===== */
.page-about .data-section {
  background: radial-gradient(ellipse at 85% 20%, rgba(0, 194, 255, 0.08), transparent 50%), #0B0E14;
}

.page-about .data-section .section-index {
  border-left-color: var(--color-data);
  color: var(--color-data);
  background: rgba(57, 255, 136, 0.08);
}

.page-about .data-section .section-index::after {
  background: var(--color-data);
}

.page-about .data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 0 0 40px;
}

.page-about .data-card {
  position: relative;
  background: linear-gradient(160deg, var(--color-bg-elev), #111827);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  padding: 24px 18px;
  overflow: hidden;
}

.page-about .data-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 0 44px 44px;
  border-color: transparent transparent rgba(0, 194, 255, 0.15) transparent;
}

.page-about .data-value {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  color: var(--color-data);
  line-height: 1.1;
  margin-bottom: 8px;
}

.page-about .data-label {
  font-size: 13px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-about .capability-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .capability-card {
  position: relative;
  background: rgba(31, 42, 68, 0.4);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent-alt);
  padding: 22px 20px 22px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .capability-card:hover {
  transform: translateX(6px);
  border-color: var(--color-accent);
}

.page-about .capability-id {
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-text-muted);
  opacity: 0.5;
}

.page-about .capability-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  padding-right: 32px;
}

.page-about .capability-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.page-about .data-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  padding: 20px 24px;
  background: linear-gradient(90deg, rgba(0, 194, 255, 0.12), rgba(255, 107, 53, 0.08));
  border-left: 4px solid var(--color-accent);
}

.page-about .data-cta-note {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== 04 资质荣誉 ===== */
.page-about .honor-section {
  background: linear-gradient(180deg, rgba(31, 42, 68, 0.5), transparent), #0B0E14;
  border-top: 1px solid var(--color-border);
}

.page-about .honor-section .section-index {
  border-left-color: var(--color-accent-alt);
  color: var(--color-accent-alt);
  background: rgba(255, 107, 53, 0.1);
}

.page-about .honor-section .section-index::after {
  background: var(--color-accent-alt);
}

.page-about .honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .honor-card {
  position: relative;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  padding: 28px 24px 24px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .honor-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  transform: scaleX(0.3);
  transform-origin: 0 0;
  transition: transform 0.3s ease;
}

.page-about .honor-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 194, 255, 0.15);
}

.page-about .honor-card:hover::before {
  transform: scaleX(1);
}

.page-about .honor-ribbon {
  position: absolute;
  top: 18px;
  right: 0;
  background: var(--color-accent-alt);
  color: #0B0E14;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 12px 4px 16px;
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 8px 100%, 0 50%);
}

.page-about .honor-card h3 {
  font-size: 17px;
  padding-right: 48px;
  margin-bottom: 10px;
}

.page-about .honor-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ===== 05 中原服务 ===== */
.page-about .zhongyuan-section {
  background: linear-gradient(130deg, rgba(255, 107, 53, 0.08), transparent 45%), #0B0E14;
  border-top: 1px solid var(--color-border);
}

.page-about .zhongyuan-section .section-index {
  border-left-color: var(--color-accent-alt);
  color: var(--color-accent-alt);
  background: rgba(255, 107, 53, 0.1);
}

.page-about .zhongyuan-section .section-index::after {
  background: var(--color-accent-alt);
}

.page-about .zhongyuan-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.page-about .zhongyuan-map {
  position: relative;
  padding: 12px;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  transform: rotate(-1deg);
}

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

.page-about .map-tag {
  position: absolute;
  background: var(--color-bg);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 8px;
}

.page-about .map-tag-city {
  top: 30%;
  left: 16%;
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.4);
}

.page-about .map-tag-node {
  bottom: 20%;
  right: 12%;
  color: var(--color-data);
  border-color: var(--color-data);
}

.page-about .zhongyuan-copy h3 {
  margin-bottom: 16px;
}

.page-about .zhongyuan-copy p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin: 0 0 20px;
}

.page-about .service-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .service-list li {
  position: relative;
  padding: 8px 0 8px 24px;
  font-size: 14px;
  color: var(--color-text);
  border-bottom: 1px dashed var(--color-border);
}

.page-about .service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.page-about .trust-quote {
  margin: 0 0 24px;
  padding: 12px 20px;
  border-left: 3px solid var(--color-accent-alt);
  background: rgba(255, 107, 53, 0.08);
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-accent-alt);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about .data-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

@media (min-width: 1024px) {
  .page-about .section {
    padding: 80px 0;
  }

  .page-about .story-grid {
    grid-template-columns: 5fr 6fr;
    gap: 64px;
  }

  .page-about .milestone-layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: start;
  }

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

  .page-about .zhongyuan-layout {
    grid-template-columns: 5fr 7fr;
    gap: 64px;
  }
}