.page-about {
  --page-toc-w: 220px;
  --page-line: rgba(201, 209, 217, .16);
  --page-accent-soft: rgba(255, 77, 28, .14);
  --page-indigo-soft: rgba(74, 61, 143, .28);
  --page-wine-soft: rgba(139, 46, 59, .22);
  --page-track: rgba(255, 77, 28, .6);
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  min-width: 0;
}

.page-about__layout {
  display: grid;
  gap: 28px;
  padding-bottom: 64px;
  min-width: 0;
}

.page-about__main {
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-about__story,
.page-about__history,
.page-about__data,
.page-about__team,
.page-about__honors {
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

/* 页面目录：移动端压缩为横向标签条 */
.page-about__toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: rgba(27, 59, 77, .5);
  border: 1px solid var(--page-line);
  border-radius: var(--radius);
}

.page-about__toc-title,
.page-about__toc-note {
  display: none;
}

.page-about__toc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about__toc-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--color-silver);
  background: rgba(10, 30, 51, .5);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.page-about__toc-link:hover {
  color: var(--color-white);
  border-color: var(--color-accent);
  background: var(--page-accent-soft);
}

.page-about__toc-index {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
}

.page-about__hero {
  position: relative;
  padding: 16px 0 8px;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: -80px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(255, 77, 28, .22) 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about__hero > * {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  margin-bottom: 24px;
}

.page-about__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.page-about__eyebrow-bar {
  width: 28px;
  height: 3px;
  background: var(--color-accent);
  clip-path: var(--clip-flag);
}

.page-about__hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.page-about__hero-stat {
  padding: 16px 14px;
  background: rgba(27, 59, 77, .55);
  border: 1px solid var(--page-line);
  border-left: 3px solid var(--color-accent);
  transition: background var(--transition), transform var(--transition);
}

.page-about__hero-stat:hover {
  background: rgba(27, 59, 77, .85);
  transform: translateY(-3px);
}

.page-about__hero-stat:first-child {
  grid-column: 1 / -1;
}

.page-about__hero-num {
  display: block;
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 600;
  line-height: 1;
  color: var(--color-white);
}

.page-about__hero-unit {
  margin-left: 2px;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-accent);
}

.page-about__hero-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-silver);
  line-height: 1.4;
}

/* 品牌故事 */
.page-about__story-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about__story-text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-silver);
}

.page-about__story-quote {
  position: relative;
  margin: 24px 0;
  padding: 20px 24px 20px 28px;
  background: linear-gradient(135deg, var(--color-indigo) 0%, rgba(74, 61, 143, .15) 80%);
  border-left: 4px solid var(--color-accent);
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-white);
}

.page-about__story-quote-mark {
  display: block;
  margin-bottom: -10px;
  font-size: 44px;
  line-height: 1;
  color: var(--color-accent);
}

.page-about__story-board {
  display: grid;
  gap: 16px;
}

.page-about__story-figure,
.page-about__history-figure,
.page-about__team-figure {
  position: relative;
  overflow: hidden;
  margin: 0;
  background: var(--color-panel);
  border: 1px solid var(--page-line);
  box-shadow: var(--shadow-card);
}

.page-about__story-figure::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 72px;
  height: 72px;
  background: var(--color-accent);
  clip-path: var(--clip-notch);
  opacity: .9;
}

.page-about__story-figure {
  aspect-ratio: 5 / 4;
}

.page-about__story-figure img,
.page-about__history-figure img,
.page-about__team-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about__story-figure figcaption,
.page-about__history-figure figcaption,
.page-about__team-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-silver);
  border-top: 1px solid var(--page-line);
}

.page-about__story-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* 发展历程 */
.page-about__history-layout {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.page-about__year-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about__year-rail-year {
  padding: 6px 14px;
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--page-accent-soft);
  border: 1px solid rgba(255, 77, 28, .3);
}

.page-about__timeline {
  position: relative;
  display: grid;
  gap: 20px;
  min-width: 0;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--page-track), rgba(138, 180, 248, .2));
}

.page-about__timeline-item {
  position: relative;
  padding-left: 34px;
  min-width: 0;
}

.page-about__timeline-item:hover .page-about__timeline-card {
  border-color: rgba(255, 77, 28, .5);
}

.page-about__timeline-dot {
  position: absolute;
  left: 0;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 77, 28, .15);
}

.page-about__timeline-card {
  transition: transform var(--transition), border-color var(--transition);
}

.page-about__timeline-card:hover {
  transform: translateY(-4px);
}

.page-about__timeline-year {
  font-family: var(--font-num);
  font-size: 14px;
}

.page-about__timeline-title {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-white);
}

.page-about__timeline-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-silver);
}

.page-about__history-figure {
  aspect-ratio: 3 / 2;
}

/* 数据规模 */
.page-about__data {
  position: relative;
  padding: 28px 20px;
  background: linear-gradient(145deg, rgba(27, 59, 77, .9) 0%, rgba(10, 30, 51, .7) 100%);
  border: 1px solid var(--page-line);
}

.page-about__data::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 96px;
  height: 4px;
  background: var(--color-accent);
}

.page-about__data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.page-about__data-item {
  padding: 16px 14px;
  background: rgba(10, 30, 51, .55);
  border: 1px solid var(--page-line);
  transition: background var(--transition), transform var(--transition);
}

.page-about__data-item:hover {
  background: rgba(10, 30, 51, .85);
  transform: translateY(-3px);
}

.page-about__data-num {
  display: block;
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--color-white);
}

.page-about__data-unit {
  margin-left: 2px;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-accent);
}

.page-about__data-title {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-silver);
}

.page-about__data-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(201, 209, 217, .8);
  border-left: 2px solid var(--color-indigo);
  padding-left: 12px;
}

/* 团队 */
.page-about__team-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about__team-figure {
  aspect-ratio: 16 / 10;
  border-top: 4px solid var(--color-indigo);
}

.page-about__team-panel p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-silver);
}

.page-about__team-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about__team-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  background: rgba(27, 59, 77, .4);
  border-left: 3px solid var(--color-accent);
  transition: background var(--transition);
}

.page-about__team-item:hover {
  background: rgba(27, 59, 77, .7);
}

.page-about__team-role {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-white);
}

.page-about__team-scope {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-silver);
}

/* 荣誉与合作 */
.page-about__honors-grid {
  display: grid;
  gap: 24px;
}

.page-about__honor-card,
.page-about__media-panel {
  position: relative;
}

.page-about__honor-card {
  padding: 24px 20px;
}

.page-about__honor-card:active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-card);
}

.page-about__honor-medal {
  display: inline-flex;
  width: 56px;
  height: 56px;
  color: var(--color-accent);
}

.page-about__honor-medal svg {
  width: 100%;
  height: 100%;
}

.page-about__honor-card h3 {
  margin: 14px 0 8px;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-white);
}

.page-about__honor-card p,
.page-about__media-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-silver);
}

.page-about__media-panel {
  padding: 24px 20px;
  border-top: 4px solid var(--color-indigo);
}

.page-about__media-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-white);
}

.page-about__media-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-about__media-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(10, 30, 51, .45);
  border: 1px solid var(--page-line);
  font-size: 13px;
  color: var(--color-silver);
  transition: border-color var(--transition), color var(--transition);
}

.page-about__media-item:hover {
  border-color: var(--color-accent);
  color: var(--color-white);
}

.page-about__media-block {
  width: 8px;
  height: 22px;
  background: var(--color-accent);
  clip-path: var(--clip-flag);
}

.page-about__media-item:nth-child(odd) .page-about__media-block {
  background: var(--color-indigo);
}

/* 页面收束导航 */
.page-about__next-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about__next-grid .btn {
  justify-content: center;
  text-align: center;
}

.page-about__next-note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(201, 209, 217, .7);
  text-align: center;
}

/* 平板与桌面端 */
@media (min-width: 640px) {
  .page-about__hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__hero-stat:first-child {
    grid-column: auto;
  }

  .page-about__data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .page-about__data {
    padding: 32px 24px;
  }

  .page-about__team-item {
    grid-template-columns: 140px 1fr;
  }

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

  .page-about__next-grid {
    grid-template-columns: repeat(4, auto);
    justify-content: center;
  }
}

/* 桌面端：左侧目录轨道 + 右侧内容流 */
@media (min-width: 1024px) {
  .page-about__layout {
    grid-template-columns: var(--page-toc-w) minmax(0, 1fr);
    gap: 56px;
    padding-bottom: 96px;
  }

  .page-about__toc {
    position: sticky;
    top: calc(var(--header-offset) + 24px);
    align-self: start;
    display: block;
    padding: 0 0 0 18px;
    background: transparent;
    border: 0;
    border-left: 4px solid var(--color-accent);
    border-radius: 0;
  }

  .page-about__toc-title {
    display: block;
    margin: 0 0 12px;
    font-family: var(--font-head);
    font-size: 16px;
    font-weight: 500;
    letter-spacing: .14em;
    color: var(--color-white);
  }

  .page-about__toc-nav {
    display: grid;
    gap: 0;
  }

  .page-about__toc-link {
    position: relative;
    padding: 10px 8px;
    background: transparent;
    border: 0;
    border-radius: 0;
  }

  .page-about__toc-link::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 50%;
    width: 10px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleY(0);
    transition: transform var(--transition);
  }

  .page-about__toc-link:hover::before {
    transform: scaleY(1);
  }

  .page-about__toc-note {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 28px;
    padding: 10px 12px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--color-silver);
    background: var(--page-accent-soft);
  }

  .page-about__toc-dot {
    width: 8px;
    height: 8px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--color-accent);
  }

  .page-about__hero {
    padding: 8px 0 18px;
  }

  .page-about__hero::after {
    width: 360px;
    height: 360px;
    right: -120px;
  }

  .page-about__story-grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 48px;
  }

  .page-about__history-layout {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about__year-rail {
    position: sticky;
    top: calc(var(--header-offset) + 28px);
    flex-direction: column;
    gap: 24px;
    border-left: 3px solid rgba(255, 77, 28, .6);
    padding-left: 14px;
  }

  .page-about__year-rail-year {
    padding: 0;
    font-size: 28px;
    background: transparent;
    border: 0;
  }

  .page-about__history-figure {
    grid-column: 2;
    margin-top: 8px;
  }

  .page-about__data-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
  }

  .page-about__team-grid {
    grid-template-columns: .9fr 1.1fr;
    gap: 48px;
  }

  .page-about__honors-grid {
    gap: 32px;
  }

  .page-about__honor-card,
  .page-about__media-panel {
    padding: 32px 28px;
  }
}

/* 宽桌面强化数据栅格 */
@media (min-width: 1280px) {
  .page-about__data-grid {
    gap: 16px;
  }

  .page-about__history-figure {
    margin-left: 48px;
  }
}