.page-about {
  --about-track-top: calc(var(--bar-h-min) + var(--index-h) + 20px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border-bottom: 2px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: 60%;
  height: 156%;
  background: linear-gradient(155deg, rgba(74, 58, 203, .62) 0%, rgba(74, 58, 203, .16) 52%, rgba(74, 58, 203, 0) 100%);
  transform: skewX(-16deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38%;
  height: 3px;
  background: var(--cyan);
  opacity: .7;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  padding-block: clamp(32px, 5vw, 68px) clamp(40px, 6vw, 84px);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--frost);
  margin: 14px 0 0;
}

.page-about .about-lede {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(15.5px, 1.1vw, 17.5px);
  line-height: 1.95;
  color: var(--silver);
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-facts {
  align-self: start;
  background: rgba(16, 30, 58, .88);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: 22px 22px 10px;
}

.page-about .about-facts-cap {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .about-facts dl {
  margin: 0;
}

.page-about .about-facts dl > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-facts dl > div:first-child {
  border-top: 0;
  padding-top: 2px;
}

.page-about .about-facts dt {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1;
  color: var(--frost);
}

.page-about .about-facts dd span {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  color: var(--mist);
  margin-left: 4px;
}

/* ---------- 时间线区块 ---------- */
.page-about .about-timeline {
  background: var(--green);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .tl-shell {
  margin-top: clamp(30px, 4vw, 52px);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-bottom: clamp(34px, 4vw, 56px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .tl-ver {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .tl-name {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--frost);
  background: rgba(52, 227, 208, .1);
  border: 1px solid var(--line-strong);
  padding: 2px 8px;
}

.page-about .tl-body {
  position: relative;
  padding-left: 24px;
  border-left: 2px solid var(--line);
}

.page-about .tl-body::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--wine);
  box-shadow: 0 0 0 3px var(--green);
}

.page-about .tl-item:nth-of-type(even) .tl-body::before {
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .tl-body h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 1.9vw, 23px);
  line-height: 1.38;
  color: var(--frost);
}

.page-about .tl-body > p {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.95;
  color: var(--silver);
}

.page-about .note-card {
  position: relative;
  margin: 24px 0 0;
  padding: 15px 20px;
  background: var(--ink-2);
  border: 2px solid var(--silver);
  border-left: 5px solid var(--wine);
  box-shadow: var(--shadow-mid);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-about .note-tag {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
  opacity: .55;
  transition: opacity .3s var(--ease), color .3s var(--ease);
}

.page-about .note-card p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .tl-side {
  display: none;
}

/* ---------- 内容组织 ---------- */
.page-about .about-organize {
  background: var(--ink);
}

.page-about .org-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .org-figure {
  margin: 0;
}

.page-about .org-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .org-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .org-copy h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.35;
  color: var(--frost);
}

.page-about .org-copy > p {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.95;
  color: var(--silver);
}

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

.page-about .org-list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 0 0;
  margin-top: 15px;
  border-top: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .org-list li:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-about .org-list .mono {
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: .12em;
  padding-top: 4px;
}

.page-about .org-chart {
  margin-top: clamp(34px, 4.5vw, 58px);
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-mid);
}

.page-about .org-chart-cap {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .org-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 编辑委员会 ---------- */
.page-about .about-board {
  background: var(--ink-2);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .board-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .board-block {
  padding: 22px 22px 24px;
  background: rgba(10, 18, 36, .62);
  border: 2px solid var(--line);
  border-top: 3px solid var(--indigo);
}

.page-about .board-i {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-about .board-block h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.4;
  color: var(--frost);
}

.page-about .board-block p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--silver);
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team {
  background: var(--green);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .team-copy h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.35;
  color: var(--frost);
}

.page-about .team-copy > p {
  margin: 0 0 16px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.95;
  color: var(--silver);
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .team-stat {
  background: rgba(10, 18, 36, .68);
  padding: 16px 16px 14px;
}

.page-about .team-stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-stat-lab {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .team-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 日常运营 ---------- */
.page-about .about-daily {
  background: var(--ink);
}

.page-about .daily-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .daily-item {
  background: var(--ink-2);
  padding: 22px 20px 24px;
  border-left: 3px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .daily-item:hover {
  border-left-color: var(--cyan);
  background: var(--ink-3);
}

.page-about .daily-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1;
  color: var(--frost);
  letter-spacing: -.01em;
}

.page-about .daily-num em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--cyan);
  margin-left: 8px;
  vertical-align: 6px;
}

.page-about .daily-item p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  background: var(--ink);
  border-top: 2px solid var(--line);
}

.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-about .next-card {
  display: block;
  padding: 22px 22px 24px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-mid);
  text-decoration: none;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .next-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-lift);
}

.page-about .next-i {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--neon);
  margin-bottom: 12px;
}

.page-about .next-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  color: var(--frost);
}

.page-about .next-card p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .next-go {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .next-tail {
  margin: 30px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--silver);
}

.page-about .next-tail a {
  color: var(--cyan);
  border-bottom: 1px solid var(--line-strong);
  text-decoration: none;
}

.page-about .next-tail a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 479px) {
  .page-about .about-hero::before {
    right: -30%;
    width: 90%;
  }

  .page-about .about-facts {
    padding: 18px 16px 8px;
  }

  .page-about .org-list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

/* ---------- 中屏 ---------- */
@media (min-width: 620px) {
  .page-about .daily-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .next-card:first-child {
    grid-column: 1 / -1;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 880px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(296px, .78fr);
    align-items: start;
  }

  .page-about .org-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.16fr);
  }

  .page-about .board-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .daily-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .next-card:first-child {
    grid-column: auto;
  }
}

@media (min-width: 760px) {
  .page-about .tl-item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .tl-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-top: 2px;
  }
}

/* ---------- 宽屏：索引侧栏与旁注外溢 ---------- */
@media (min-width: 1180px) {
  .page-about .tl-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: clamp(36px, 4vw, 64px);
    align-items: start;
  }

  .page-about .tl-side {
    display: block;
    position: sticky;
    top: var(--about-track-top);
  }

  .page-about .tl-side figure {
    margin: 0;
  }

  .page-about .tl-side img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 900 / 1400;
    object-fit: cover;
    border: 2px solid var(--line);
    box-shadow: var(--shadow-hard);
  }

  .page-about .tl-side figcaption {
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .08em;
    line-height: 1.7;
    color: var(--mist);
  }
}

@media (min-width: 1240px) {
  .page-about .note-card {
    margin-right: -44px;
  }

  .page-about .note-card:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-lift);
    border-color: var(--cyan);
  }

  .page-about .note-card:hover .note-tag {
    opacity: 1;
    color: var(--cyan);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .note-card,
  .page-about .next-card,
  .page-about .daily-item,
  .page-about .note-tag {
    transition: none;
  }

  .page-about .note-card:hover {
    transform: none;
  }
}
<<<END>>>
</main>