.page-about {
  --about-navy: #0A1628;
  --about-navy-deep: #060E1A;
  --about-navy-soft: #14233C;
  --about-paper: #F4EFE6;
  --about-paper-deep: #EDE8DF;
  --about-gold: #C9A961;
  --about-gold-light: #DBBF7F;
  --about-orange: #F26522;
  --about-steel: #4D6A8F;
  --about-ink: #1F2430;
  --about-muted: #6A717C;
  --about-red: #E23B3B;
  --about-font-num: 'DIN Alternate', 'Arial Narrow', 'Helvetica Neue', sans-serif;
  background: var(--about-paper);
  color: var(--about-ink);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  padding-bottom: 24px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-muted);
  border-bottom: 1px solid rgba(201, 169, 97, 0.35);
  margin-bottom: 0;
}

.page-about .breadcrumb-item a {
  color: var(--about-steel);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about .breadcrumb-item a:hover,
.page-about .breadcrumb-item a:focus-visible {
  color: var(--about-orange);
  outline: none;
}

.page-about .breadcrumb-sep {
  color: var(--about-gold);
  font-size: 12px;
}

.page-about .breadcrumb-current {
  color: var(--about-navy);
  font-weight: 600;
}

/* ---------- 首屏 Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 64px 0 80px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  border-bottom: 1px solid rgba(10, 22, 40, 0.08);
}

.page-about .about-hero__topline {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
}

.page-about .section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-navy);
}

.page-about .section-label__line {
  display: inline-block;
  width: 40px;
  height: 1px;
  background: var(--about-gold);
}

.page-about .section-label__dot {
  color: var(--about-orange);
  font-size: 10px;
}

.page-about .about-hero__version-note {
  position: absolute;
  right: 0;
  top: -6px;
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.35em;
  color: var(--about-gold);
  font-weight: 500;
  padding-top: 30px;
}

.page-about .about-hero__version-note::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 22px;
  background: var(--about-orange);
}

.page-about .about-hero__title {
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--about-navy);
  margin: 0;
  max-width: 900px;
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
}

.page-about .about-hero__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink);
  max-width: 560px;
  border-left: 3px solid var(--about-gold);
  padding-left: 20px;
  margin: 0;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__fact {
  background: var(--about-navy);
  color: var(--about-paper);
  padding: 20px 24px;
  min-width: 160px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__fact::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--about-gold), var(--about-orange));
}

.page-about .about-hero__fact-num {
  font-family: var(--about-font-num);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--about-paper);
  line-height: 1;
}

.page-about .about-hero__fact-unit {
  font-size: 1rem;
  color: var(--about-gold);
  margin-left: 4px;
}

.page-about .about-hero__fact-label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--about-gold-light);
  line-height: 1.5;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-wrap {
  position: relative;
  background: var(--about-navy);
  color: var(--about-paper);
  padding: 80px 0 88px;
  overflow: hidden;
}

.page-about .about-timeline-side {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 56px;
  background: var(--about-navy-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.page-about .about-timeline-side__text {
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.5em;
  color: rgba(244, 239, 230, 0.5);
  text-transform: uppercase;
  font-weight: 600;
}

.page-about .about-timeline-side__glow {
  position: absolute;
  bottom: 24px;
  font-family: var(--about-font-num);
  font-size: 16px;
  font-weight: 700;
  color: var(--about-gold);
  opacity: 0.6;
}

.page-about .about-timeline-head {
  margin-bottom: 64px;
  position: relative;
}

.page-about .about-timeline-head .section-label {
  color: var(--about-paper);
}

.page-about .about-timeline-head .section-label__line {
  background: var(--about-gold);
}

.page-about .about-timeline-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  margin: 24px 0 16px;
  color: var(--about-paper);
  line-height: 1.2;
}

.page-about .about-timeline-desc {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.72);
  max-width: 520px;
  margin: 0;
}

.page-about .timeline-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 24px;
}

.page-about .timeline-list::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--about-gold),
    var(--about-orange),
    var(--about-gold),
    var(--about-gold),
    rgba(201, 169, 97, 0.2)
  );
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 48px 32px;
  cursor: default;
}

.page-about .timeline-node:last-child {
  padding-bottom: 8px;
}

.page-about .timeline-node__marker {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-gold);
  box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.16);
  transition: background 0.25s ease, box-shadow 0.25s ease;
  z-index: 1;
}

.page-about .timeline-node:hover .timeline-node__marker,
.page-about .timeline-node:focus-visible .timeline-node__marker {
  background: var(--about-orange);
  box-shadow: 0 0 0 8px rgba(242, 101, 34, 0.18);
}

.page-about .timeline-node__body {
  background: rgba(20, 35, 60, 0.82);
  border: 1px solid rgba(201, 169, 97, 0.18);
  border-radius: 2px;
  padding: 24px 24px 20px;
  transition: background 0.3s var(--ease, ease), border-color 0.3s ease, transform 0.3s var(--ease, ease);
}

.page-about .timeline-node:hover .timeline-node__body,
.page-about .timeline-node:focus-visible .timeline-node__body {
  background: rgba(20, 35, 60, 1);
  border-color: rgba(201, 169, 97, 0.5);
  transform: translateX(6px);
}

.page-about .timeline-node__tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .timeline-node__version {
  font-family: var(--about-font-num);
  font-size: 3rem;
  font-weight: 700;
  color: var(--about-gold);
  line-height: 1;
  display: block;
  margin-bottom: 12px;
  letter-spacing: 0.03em;
}

.page-about .timeline-node__desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.82);
  margin: 0 0 16px;
}

.page-about .timeline-node__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .timeline-node__meta {
  font-size: 12px;
  color: var(--about-gold-light);
  background: rgba(201, 169, 97, 0.1);
  border-radius: 2px;
  padding: 4px 10px;
  letter-spacing: 0.04em;
}

.page-about .about-timeline-more {
  margin-top: 48px;
  font-size: 14px;
  color: rgba(244, 239, 230, 0.68);
  border-top: 1px solid rgba(201, 169, 97, 0.2);
  padding-top: 24px;
}

.page-about .about-timeline-more a {
  color: var(--about-gold);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-timeline-more a:hover,
.page-about .about-timeline-more a:focus-visible {
  color: var(--about-orange);
}

/* ---------- 版本演进背景图 ---------- */
.page-about .about-visual-section {
  position: relative;
  padding: 0;
  margin: 0 auto;
}

.page-about .about-visual-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
}

.page-about .about-visual-caption {
  position: absolute;
  right: 20px;
  bottom: 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-paper);
  background: rgba(10, 22, 40, 0.82);
  padding: 8px 16px;
  border-left: 2px solid var(--about-orange);
  backdrop-filter: blur(4px);
}

/* ---------- 数据覆盖 ---------- */
.page-about .about-coverage {
  background: var(--about-paper);
  padding: 88px 0 96px;
}

.page-about .about-coverage-head {
  margin-bottom: 56px;
}

.page-about .about-coverage-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--about-navy);
  margin: 24px 0 12px;
  line-height: 1.2;
}

.page-about .about-coverage-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
  max-width: 540px;
  margin: 0;
}

.page-about .about-coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.page-about .about-coverage-item {
  position: relative;
  padding: 28px 28px 24px;
  border: 1px solid rgba(10, 22, 40, 0.12);
  border-radius: 2px;
  overflow: hidden;
  transition: background 0.25s ease, border-color 0.25s ease;
  background: var(--about-paper-deep);
}

.page-about .about-coverage-item:hover {
  border-color: var(--about-gold);
  background: var(--about-paper);
}

.page-about .about-coverage-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--about-gold);
  transform: scaleX(0.3);
  transform-origin: left;
  transition: transform 0.3s var(--ease, ease);
}

.page-about .about-coverage-item:hover::before {
  transform: scaleX(1);
}

.page-about .about-coverage-item__num {
  font-family: var(--about-font-num);
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--about-navy);
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}

.page-about .about-coverage-item__plus {
  color: var(--about-orange);
  font-size: 1.6rem;
  margin-left: 2px;
}

.page-about .about-coverage-item__label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--about-navy);
  margin-bottom: 8px;
}

.page-about .about-coverage-item__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-coverage-chart {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  background: var(--about-navy);
  padding: 32px;
  border-radius: 2px;
}

.page-about .about-coverage-chart__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-coverage-chart__note {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .about-coverage-chart__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--about-paper);
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-coverage-chart__note p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.72);
  margin: 0;
}

.page-about .about-coverage-chart__count {
  font-family: var(--about-font-num);
  font-size: 5rem;
  font-weight: 700;
  color: var(--about-gold);
  line-height: 1;
  margin-top: 24px;
}

.page-about .about-coverage-chart__count span {
  color: var(--about-orange);
  font-size: 2.4rem;
}

.page-about .about-coverage-chart__caption {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(244, 239, 230, 0.55);
  margin-top: 6px;
}

/* ---------- 稳定性建设 ---------- */
.page-about .about-stability {
  background: var(--about-navy-deep);
  padding: 88px 0;
  color: var(--about-paper);
}

.page-about .about-stability-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .about-stability-content .section-label {
  color: var(--about-paper);
}

.page-about .about-stability-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--about-paper);
  margin: 20px 0 16px;
  line-height: 1.2;
}

.page-about .about-stability-lead {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.8);
  max-width: 460px;
  margin: 0 0 36px;
}

.page-about .about-stability-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about .about-stability-list__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
}

.page-about .about-stability-list__num {
  font-family: var(--about-font-num);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--about-orange);
  line-height: 1.2;
}

.page-about .about-stability-list__title {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--about-paper);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.page-about .about-stability-list__desc {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.65);
  margin: 0;
}

.page-about .about-stability-visual {
  position: relative;
}

.page-about .about-stability-visual__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.page-about .about-stability-visual__caption {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(244, 239, 230, 0.55);
  border-left: 2px solid var(--about-gold);
  padding-left: 12px;
}

/* ---------- 品牌升级动机 ---------- */
.page-about .about-upgrade {
  background: var(--about-paper);
  padding: 88px 0;
}

.page-about .about-upgrade-head {
  margin-bottom: 48px;
}

.page-about .about-upgrade-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--about-navy);
  margin: 20px 0 0;
  line-height: 1.2;
}

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

.page-about .about-upgrade-card {
  background: var(--about-paper-deep);
  border: 1px solid rgba(10, 22, 40, 0.08);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease, ease), box-shadow 0.3s var(--ease, ease);
}

.page-about .about-upgrade-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow, 0 6px 24px rgba(10, 22, 40, 0.14));
  border-color: rgba(201, 169, 97, 0.5);
}

.page-about .about-upgrade-card::after {
  content: '';
  position: absolute;
  right: -20px;
  top: -20px;
  width: 80px;
  height: 80px;
  border: 1px solid rgba(201, 169, 97, 0.2);
  transform: rotate(45deg);
}

.page-about .about-upgrade-card__num {
  font-family: var(--about-font-num);
  font-size: 2rem;
  font-weight: 700;
  color: var(--about-gold);
  display: block;
  margin-bottom: 16px;
}

.page-about .about-upgrade-card__title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-navy);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}

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

/* ---------- 合作与生态 ---------- */
.page-about .about-ecosystem {
  background: var(--about-paper);
  padding: 0 0 96px;
}

.page-about .about-ecosystem-inner {
  max-width: 820px;
}

.page-about .about-ecosystem-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--about-navy);
  margin: 20px 0 16px;
  line-height: 1.2;
}

.page-about .about-ecosystem-desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-muted);
  margin: 0 0 40px;
}

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

.page-about .about-ecosystem-item {
  background: var(--about-paper-deep);
  border-left: 3px solid var(--about-gold);
  padding: 24px 28px;
  transition: background 0.25s ease;
}

.page-about .about-ecosystem-item:hover {
  background: var(--about-paper);
}

.page-about .about-ecosystem-item__icon {
  font-size: 22px;
  color: var(--about-orange);
  display: block;
  margin-bottom: 12px;
}

.page-about .about-ecosystem-item__role {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--about-navy);
  margin-bottom: 8px;
}

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

.page-about .about-ecosystem-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 2px;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.page-about .btn-primary {
  background: var(--about-orange);
  color: var(--about-paper);
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: var(--about-navy);
  color: var(--about-paper);
  transform: translateY(-2px);
  outline: none;
}

.page-about .btn-outline {
  background: transparent;
  border-color: var(--about-navy);
  color: var(--about-navy);
}

.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--about-navy);
  color: var(--about-paper);
  transform: translateY(-2px);
  outline: none;
}

/* ---------- 底部过渡 ---------- */
.page-about .about-transition {
  background: var(--about-navy);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-transition::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(242, 101, 34, 0.18) 0%, transparent 70%);
}

.page-about .about-transition::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--about-gold), var(--about-orange), transparent);
}

.page-about .about-transition .container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about .about-transition__text {
  font-size: clamp(1.4rem, 3.4vw, 2.4rem);
  font-weight: 700;
  color: var(--about-paper);
  margin: 0;
  line-height: 1.3;
}

.page-about .about-transition__accent {
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--about-gold);
  text-transform: uppercase;
}

.page-about .about-transition__link a {
  color: var(--about-gold-light);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 169, 97, 0.4);
  padding-bottom: 4px;
}

.page-about .about-transition__link a:hover,
.page-about .about-transition__link a:focus-visible {
  color: var(--about-orange);
  border-color: var(--about-orange);
  outline: none;
}

/* ---------- 标签 ---------- */
.page-about .tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 4px 10px;
  border-radius: 2px;
  text-transform: uppercase;
}

.page-about .tag-navy {
  background: rgba(201, 169, 97, 0.16);
  color: var(--about-gold-light);
  border: 1px solid rgba(201, 169, 97, 0.25);
}

.page-about .tag-gold {
  background: rgba(201, 169, 97, 0.24);
  color: var(--about-gold-light);
  border: 1px solid rgba(201, 169, 97, 0.35);
}

.page-about .tag-orange {
  background: rgba(242, 101, 34, 0.18);
  color: var(--about-orange);
  border: 1px solid rgba(242, 101, 34, 0.3);
}

/* ---------- 竖向小字 ---------- */
.page-about .note-vertical {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

/* ---------- 媒体查询：平板 768px ---------- */
@media screen and (min-width: 768px) {
  .page-about .about-hero {
    grid-template-columns: 1fr;
    padding: 80px 0 96px;
  }

  .page-about .about-hero__content {
    grid-template-columns: 1.2fr 1fr;
    align-items: end;
  }

  .page-about .about-hero__facts {
    justify-content: flex-end;
  }

  .page-about .about-hero__fact {
    min-width: 130px;
  }

  .page-about .about-timeline-side {
    width: 72px;
  }

  .page-about .timeline-list {
    padding-left: 48px;
  }

  .page-about .timeline-list::before {
    left: 48px;
  }

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

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

  .page-about .timeline-node__body {
    padding: 28px 32px 24px;
  }

  .page-about .timeline-node__version {
    font-size: 3.6rem;
  }

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

  .page-about .about-coverage-chart {
    grid-template-columns: 1.2fr 1fr;
    padding: 40px;
  }

  .page-about .about-stability-inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 64px;
  }

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

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

  .page-about .about-ecosystem-item:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-transition .container {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- 媒体查询：桌面 1024px ---------- */
@media screen and (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: 1fr;
    padding: 96px 0 120px;
  }

  .page-about .about-hero__title {
    max-width: 1000px;
  }

  .page-about .about-hero__content {
    grid-template-columns: 1.4fr 1fr;
  }

  .page-about .about-timeline-wrap {
    padding-left: 72px;
  }

  .page-about .about-coverage-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
  }

  .page-about .about-coverage-chart {
    padding: 48px;
  }

  .page-about .about-stability {
    padding: 112px 0;
  }

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

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

  .page-about .about-ecosystem-item:last-child {
    grid-column: auto;
  }
}

/* ---------- 减弱动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.page-about {
  --font-heading: inherit;
}