.page-about {
  --about-green: #00FF87;
  --about-blue: #00C2FF;
  --about-purple: #7B61FF;
  --about-bg-deep: #0B0F19;
  --about-bg-panel: #111827;
  --about-muted: #A0AEC0;
  --about-glass: rgba(255, 255, 255, 0.08);
  --about-line: rgba(255, 255, 255, 0.14);
  --about-radius-lg: 20px;
  --about-radius-md: 14px;
  --about-font-head: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --about-font-data: "Roboto Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  background: var(--about-bg-deep);
  color: #FFFFFF;
  font-family: var(--about-font-body);
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb-wrap {
  padding-top: 40px;
  padding-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: relative;
  z-index: 2;
}

.page-about .breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  font-size: 14px;
  font-family: var(--about-font-data);
  color: var(--about-muted);
}

.page-about .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-about .breadcrumb li + li::before {
  content: "→";
  color: var(--about-green);
  font-size: 12px;
}

.page-about .breadcrumb a {
  color: var(--about-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--about-green);
}

.page-about .breadcrumb span[aria-current="page"] {
  color: #FFFFFF;
  font-weight: 700;
}

.page-about .page-context {
  margin: 0;
  font-size: 13px;
  color: var(--about-muted);
  font-family: var(--about-font-data);
  letter-spacing: 0.02em;
}

/* ===== 首屏封面区 ===== */
.page-about .cover-section {
  position: relative;
  padding: 64px 0 96px;
  overflow: hidden;
}

.page-about .cover-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 194, 255, 0.16), transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(0, 255, 135, 0.10), transparent 35%);
  pointer-events: none;
}

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

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

.page-about .cover-main {
  position: relative;
}

.page-about .cover-kicker {
  font-size: 14px;
  font-family: var(--about-font-data);
  color: var(--about-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .cover-kicker::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--about-green);
}

.page-about .cover-main h1 {
  margin: 0 0 28px;
  font-family: var(--about-font-head);
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: #FFFFFF;
  position: relative;
}

.page-about .cover-main h1::after {
  content: "";
  display: block;
  width: 120px;
  height: 4px;
  margin-top: 24px;
  background: linear-gradient(90deg, var(--about-green), var(--about-blue));
  border-radius: 2px;
}

.page-about .cover-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-muted);
  max-width: 640px;
  margin: 0 0 36px;
}

.page-about .cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .cover-actions .btn {
  font-family: var(--about-font-body);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 50px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
  border: none;
  cursor: pointer;
}

.page-about .cover-actions .btn-primary {
  background: linear-gradient(135deg, var(--about-green), #00cc6f);
  color: #0B0F19;
}

.page-about .cover-actions .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 255, 135, 0.25);
}

.page-about .cover-actions .btn-ghost {
  background: transparent;
  color: #FFFFFF;
  border: 1px solid var(--about-line);
}

.page-about .cover-actions .btn-ghost:hover {
  border-color: var(--about-blue);
  color: var(--about-blue);
  transform: translateY(-2px);
}

/* 封面数据速览面板 */
.page-about .cover-stats {
  position: relative;
}

.page-about .stat-panel {
  background: var(--about-glass);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  animation: about-float-in 0.8s var(--ease) both;
}

.page-about .stat-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 32px;
  right: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 135, 0.5), rgba(0, 194, 255, 0.5), transparent);
}

.page-about .stat-panel::after {
  content: "STATUS PANEL";
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 9px;
  font-family: var(--about-font-data);
  color: rgba(160, 174, 192, 0.5);
  letter-spacing: 0.08em;
}

.page-about .stat-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .stat-item:last-of-type {
  border-bottom: none;
}

.page-about .stat-label {
  font-size: 13px;
  color: var(--about-muted);
  font-family: var(--about-font-data);
  letter-spacing: 0.02em;
}

.page-about .stat-num {
  font-size: 36px;
  font-weight: 900;
  font-family: var(--about-font-head);
  color: #FFFFFF;
  line-height: 1.1;
  background: linear-gradient(135deg, #FFFFFF 50%, var(--about-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-about .stat-num span {
  font-size: 20px;
  -webkit-text-fill-color: var(--about-green);
  color: var(--about-green);
  margin-left: 2px;
}

.page-about .stat-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-muted);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-family: var(--about-font-data);
}

/* 斜切渐变分隔 */
.page-about .cover-skew {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(135deg, transparent 0%, transparent 20%, rgba(0, 255, 135, 0.06) 80%, rgba(0, 194, 255, 0.08) 100%);
  clip-path: polygon(0 100%, 100% 100%, 100% 0, 0 100%);
  z-index: 0;
}

/* ===== 通用区块 ===== */
.page-about .container {
  max-width: 1240px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.page-about .section {
  position: relative;
  padding: 72px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .section-tag {
  font-size: 14px;
  font-family: var(--about-font-data);
  color: var(--about-blue);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .section-tag::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--about-blue), var(--about-green));
}

.page-about .section h2 {
  font-family: var(--about-font-head);
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.15;
  margin: 0 0 20px;
  color: #FFFFFF;
  letter-spacing: -0.01em;
}

.page-about .section-description {
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-muted);
  max-width: 660px;
  margin: 0;
}

/* ===== 品牌定位区 ===== */
.page-about .positioning-section {
  background: linear-gradient(180deg, #0B0F19 0%, #101826 100%);
}

.page-about .positioning-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .positioning-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-muted);
  margin: 0 0 20px;
}

.page-about .positioning-copy p:first-of-type {
  font-size: 18px;
  color: #FFFFFF;
  line-height: 1.9;
  border-left: 3px solid var(--about-green);
  padding-left: 18px;
  font-weight: 500;
}

.page-about .positioning-copy .section-tag {
  margin-bottom: 12px;
}

.page-about .positioning-image {
  position: relative;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: linear-gradient(135deg, #16213a, #0f1a2e);
  transform: rotate(-0.5deg);
}

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

.page-about .positioning-image::after {
  content: "坐标中国体育坐标";
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(8px);
  color: var(--about-green);
  font-family: var(--about-font-data);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid rgba(0, 255, 135, 0.25);
}

/* ===== 时间轴区 ===== */
.page-about .timeline-section {
  background: #0D1220;
  border-top: none;
  overflow: hidden;
}

.page-about .section-heading {
  margin-bottom: 48px;
}

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

.page-about .timeline-wrap::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-green), var(--about-blue), rgba(0, 194, 255, 0.1));
  opacity: 0.3;
}

.page-about .timeline-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.page-about .timeline-baseline {
  fill: none;
  stroke: rgba(0, 255, 135, 0.18);
  stroke-width: 2;
  stroke-dasharray: 6 6;
}

.page-about .timeline-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .timeline-node {
  position: relative;
  padding-left: 0;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 16px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-bg-deep);
  border: 3px solid var(--about-green);
  box-shadow: 0 0 0 4px rgba(0, 255, 135, 0.1), 0 0 24px rgba(0, 255, 135, 0.3);
}

.page-about .timeline-node.node-2020::before,
.page-about .timeline-node.node-recent::before {
  border-color: var(--about-blue);
  box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.1), 0 0 24px rgba(0, 194, 255, 0.3);
}

.page-about .timeline-node.node-2022::before {
  border-color: var(--about-purple);
  box-shadow: 0 0 0 4px rgba(123, 97, 255, 0.1), 0 0 24px rgba(123, 97, 255, 0.3);
}

.page-about .timeline-year {
  font-family: var(--about-font-head);
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 14px;
  background: linear-gradient(135deg, var(--about-green), var(--about-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 0;
}

.page-about .timeline-node.node-2022 .timeline-year {
  background: linear-gradient(135deg, var(--about-purple), var(--about-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-about .timeline-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 22px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-left: 0;
}

.page-about .timeline-card h3 {
  font-size: 18px;
  font-family: var(--about-font-head);
  margin: 0 0 10px;
  color: #FFFFFF;
  line-height: 1.4;
}

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

/* ===== 变更说明区 ===== */
.page-about .change-section {
  background: #0B0F19;
  position: relative;
}

.page-about .change-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 15% 0%, rgba(0, 255, 135, 0.06), transparent 30%),
    radial-gradient(circle at 90% 50%, rgba(0, 194, 255, 0.05), transparent 25%);
  pointer-events: none;
}

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

.page-about .change-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 36px;
}

.page-about .change-panel {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--about-radius-md);
  padding: 28px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.page-about .change-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--panel-accent, transparent);
  border-radius: 3px;
}

.page-about .change-panel:nth-child(1),
.page-about .change-panel:nth-child(2) {
  --panel-accent: var(--about-green);
}

.page-about .change-panel:nth-child(3),
.page-about .change-panel:nth-child(4) {
  --panel-accent: var(--about-blue);
}

.page-about .change-panel:nth-child(5),
.page-about .change-panel:nth-child(6) {
  --panel-accent: var(--about-purple);
}

.page-about .change-panel:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.page-about .change-number {
  font-family: var(--about-font-data);
  font-size: 12px;
  color: var(--about-muted);
  letter-spacing: 0.06em;
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  margin-bottom: 16px;
  background: rgba(0, 0, 0, 0.3);
  font-weight: 700;
}

.page-about .change-panel h3 {
  font-size: 17px;
  font-family: var(--about-font-head);
  color: #FFFFFF;
  margin: 0 0 10px;
  line-height: 1.4;
}

.page-about .change-panel p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .change-cta {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .change-cta p {
  font-size: 16px;
  line-height: 1.6;
  color: #FFFFFF;
  margin: 0;
  font-weight: 500;
}

.page-about .change-cta .btn {
  font-family: var(--about-font-body);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 50px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
  background: transparent;
  color: var(--about-blue);
  border: 1px solid rgba(0, 194, 255, 0.4);
}

.page-about .change-cta .btn:hover {
  border-color: var(--about-blue);
  box-shadow: 0 0 24px rgba(0, 194, 255, 0.2);
  transform: translateY(-2px);
}

/* ===== 本土化承诺区 ===== */
.page-about .local-section {
  background: linear-gradient(160deg, #101826 0%, #0B0F19 100%);
  border-top: none;
}

.page-about .local-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .local-image {
  position: relative;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  transform: rotate(0.5deg);
  background: linear-gradient(135deg, #1a2337, #0f1a2e);
}

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

.page-about .local-image::after {
  content: "福建 · 厦门";
  position: absolute;
  bottom: 16px;
  right: 16px;
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(8px);
  color: var(--about-blue);
  font-family: var(--about-font-data);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid rgba(0, 194, 255, 0.3);
}

.page-about .local-content h2 {
  font-family: var(--about-font-head);
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.15;
  margin: 0 0 8px;
  color: #FFFFFF;
}

.page-about .local-list {
  margin-top: 24px;
}

.page-about .local-item {
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px 0 14px 22px;
  margin-bottom: 10px;
  position: relative;
  transition: border-color 0.3s var(--ease);
}

.page-about .local-item:hover {
  border-left-color: var(--about-green);
}

.page-about .local-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin: 0 0 6px;
  font-family: var(--about-font-body);
}

.page-about .local-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

/* ===== 数据与信任区 ===== */
.page-about .trust-section {
  background: #0B0F19;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 96px;
}

.page-about .trust-section .section-tag {
  color: var(--about-green);
}

.page-about .trust-copy {
  max-width: 780px;
}

.page-about .trust-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-muted);
  margin: 0 0 16px;
}

.page-about .trust-data-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .trust-data-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.page-about .trust-stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 24px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .trust-stat:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 255, 135, 0.4);
}

.page-about .trust-stat:nth-child(2n) {
  border-top-color: rgba(0, 194, 255, 0.3);
}

.page-about .trust-num {
  font-family: var(--about-font-head);
  font-size: 42px;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1.1;
}

.page-about .trust-num span {
  color: var(--about-green);
  font-size: 22px;
  margin-left: 2px;
}

.page-about .trust-stat:nth-child(2n) .trust-num span {
  color: var(--about-blue);
}

.page-about .trust-label {
  font-size: 14px;
  color: var(--about-muted);
  margin-top: 10px;
  font-family: var(--about-font-data);
  letter-spacing: 0.02em;
}

.page-about .trust-chart {
  position: relative;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

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

.page-about .trust-chart::before {
  content: "用户增长趋势";
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(8px);
  color: var(--about-blue);
  font-family: var(--about-font-data);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid rgba(0, 194, 255, 0.3);
  z-index: 1;
}

.page-about .trust-badges {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .badge-item {
  font-size: 14px;
  font-family: var(--about-font-data);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.02em;
}

.page-about .badge-item::before {
  content: "◆";
  font-size: 9px;
  color: var(--about-green);
}

.page-about .trust-note {
  margin-top: 40px;
  background: linear-gradient(135deg, rgba(0, 255, 135, 0.06), rgba(0, 194, 255, 0.06));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--about-green);
  border-radius: 12px;
  padding: 24px 28px;
}

.page-about .trust-note p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
  margin: 0;
}

/* ===== 延伸导航 ===== */
.page-about .subnav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding-top: 48px;
  padding-bottom: 80px;
}

.page-about .subnav-item {
  display: block;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 22px 24px;
  text-decoration: none;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .subnav-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 255, 135, 0.3);
  transform: translateY(-2px);
}

.page-about .subnav-direction {
  display: block;
  font-size: 12px;
  font-family: var(--about-font-data);
  color: var(--about-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.page-about .subnav-title {
  display: block;
  font-size: 20px;
  font-weight: 900;
  color: #FFFFFF;
  font-family: var(--about-font-head);
  margin-bottom: 4px;
}

.page-about .subnav-desc {
  display: block;
  font-size: 14px;
  color: var(--about-muted);
}

/* ===== 动画 ===== */
@keyframes about-float-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== 媒体查询：平板 ===== */
@media (min-width: 640px) {
  .page-about .timeline-grid {
    gap: 40px;
  }

  .page-about .timeline-year {
    font-size: 64px;
  }

  .page-about .timeline-card {
    margin-left: 48px;
  }

  .page-about .timeline-node::before {
    top: 4px;
    left: 18px;
  }

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

  .page-about .trust-data-main {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .trust-stat {
    min-height: 140px;
  }

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

/* ===== 媒体查询：桌面 ===== */
@media (min-width: 1024px) {
  .page-about .container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .cover-section {
    min-height: 620px;
    display: flex;
    align-items: center;
    padding: 48px 0 80px;
  }

  .page-about .cover-grid {
    grid-template-columns: 1.35fr 0.85fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .cover-main h1 {
    font-size: 76px;
    line-height: 1.02;
  }

  .page-about .cover-lead {
    font-size: 18px;
    max-width: 580px;
  }

  .page-about .stat-panel {
    padding: 36px;
  }

  .page-about .section {
    padding: 88px 0;
  }

  .page-about .positioning-grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }

  .page-about .positioning-copy {
    order: 1;
  }

  .page-about .positioning-image {
    order: 2;
  }

  .page-about .timeline-wrap {
    padding-bottom: 20px;
  }

  .page-about .timeline-wrap::before {
    top: 20px;
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
  }

  .page-about .timeline-grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px 64px;
    align-items: start;
  }

  .page-about .timeline-node {
    padding-left: 48px;
    position: relative;
  }

  .page-about .timeline-node::before {
    top: 8px;
    left: -14px;
    width: 16px;
    height: 16px;
  }

  .page-about .timeline-node:nth-child(even) {
    padding-left: 0;
    padding-right: 48px;
    text-align: right;
  }

  .page-about .timeline-node:nth-child(even)::before {
    left: auto;
    right: -14px;
  }

  .page-about .timeline-node:nth-child(even) .timeline-card {
    margin-left: 0;
    margin-right: 0;
  }

  .page-about .timeline-node:nth-child(even) .timeline-year {
    padding-right: 0;
    padding-left: 0;
  }

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

  .page-about .timeline-year {
    font-size: 72px;
    margin-bottom: 12px;
  }

  .page-about .change-section::before {
    background:
      radial-gradient(circle at 15% 0%, rgba(0, 255, 135, 0.08), transparent 30%),
      radial-gradient(circle at 90% 50%, rgba(0, 194, 255, 0.06), transparent 25%);
  }

  .page-about .change-grid {
    gap: 24px;
    margin-top: 48px;
  }

  .page-about .change-panel {
    padding: 32px;
  }

  .page-about .change-cta {
    padding-top: 32px;
  }

  .page-about .local-grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }

  .page-about .trust-data-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
  }

  .page-about .trust-data-main {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .page-about .trust-stat {
    min-height: 160px;
    padding: 28px;
  }

  .page-about .trust-num {
    font-size: 48px;
  }

  .page-about .subnav {
    grid-template-columns: repeat(4, 1fr);
    padding-top: 56px;
  }
}

/* ===== 媒体查询：宽屏 ===== */
@media (min-width: 1440px) {
  .page-about .cover-grid {
    gap: 96px;
  }

  .page-about .cover-main h1 {
    font-size: 88px;
  }

  .page-about .stat-panel {
    padding: 40px;
  }

  .page-about .timeline-grid {
    gap: 88px 80px;
    padding-left: 64px;
    padding-right: 64px;
  }

  .page-about .change-grid {
    gap: 28px;
  }

  .page-about .trust-data-grid {
    gap: 96px;
  }
}