.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

/* ---------- 开篇：报头式立场 ---------- */
.page-about .about-open {
  padding: clamp(20px, 4vw, 40px) 0 clamp(40px, 6vw, 88px);
}

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

@media (min-width: 980px) {
  .page-about .about-open__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }
}

.page-about .about-open__title {
  margin: 16px 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8.2vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-open__lead {
  margin: 0 0 18px;
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-open__lede .prose {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-open__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-open__facts > div {
  display: grid;
  gap: 6px;
}

.page-about .about-open__facts dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-about .about-open__facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-open__media {
  margin: 0;
}

/* ---------- 主体分栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: clamp(48px, 8vw, 104px);
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 216px;
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

.page-about .about-main > * + * {
  margin-top: clamp(52px, 7.5vw, 100px);
}

.page-about .about-toc {
  display: none;
}

@media (min-width: 1040px) {
  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 104px;
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }
}

.page-about .about-toc__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

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

.page-about .about-toc__list a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.5;
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a[aria-current="true"] {
  color: var(--lime);
  padding-left: 6px;
}

.page-about .about-toc__note {
  margin: 22px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 图片框统一 ---------- */
.page-about .img-frame img {
  max-width: 100%;
  height: auto;
}

.page-about .about-timeline__figure {
  margin: 0 0 6px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__track {
  display: flex;
  gap: 10px;
  margin-top: 28px;
  padding: 6px 2px 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__node {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: grid;
  gap: 6px;
  min-width: 134px;
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-body);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-about .about-timeline__node .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: inherit;
}

.page-about .about-timeline__node b {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-timeline__node[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-timeline__node[aria-pressed="true"] span,
.page-about .about-timeline__node[aria-pressed="true"] b {
  color: var(--on-lime);
}

.page-about .about-timeline__panels {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-stage {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 22px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
}

@media (min-width: 760px) {
  .page-about .about-stage {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 4px 28px;
    align-items: start;
    padding: 24px 28px 22px 24px;
  }
}

.page-about .about-stage .about-stage__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.page-about .about-stage__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2vw, 25px);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-stage__body p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-stage__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-stage .about-stage__meta {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
  opacity: 0.85;
}

/* ---------- 版本演进带 ---------- */
.page-about .about-versions {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 840px) {
  .page-about .about-versions {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    align-items: end;
  }

  .page-about .about-versions > li:nth-child(1) { margin-bottom: 72px; }
  .page-about .about-versions > li:nth-child(2) { margin-bottom: 54px; }
  .page-about .about-versions > li:nth-child(3) { margin-bottom: 36px; }
  .page-about .about-versions > li:nth-child(4) { margin-bottom: 18px; }
  .page-about .about-versions > li:nth-child(5) { margin-bottom: 0; }
}

.page-about .about-version {
  padding: 20px 18px 22px;
  background: linear-gradient(158deg, var(--panel) 0%, var(--raise) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-about .about-version__code {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .about-version__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-version__desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-version__fields {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

@media (min-width: 840px) {
  .page-about .about-version {
    transform: skewX(-3deg);
  }

  .page-about .about-version > * {
    transform: skewX(3deg);
  }
}

.page-about .about-version:last-child {
  background: var(--night);
  border-color: var(--lime);
}

.page-about .about-version:last-child .about-version__code,
.page-about .about-version:last-child .about-version__fields {
  color: var(--lime);
}

/* ---------- 团队 ---------- */
.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 20px;
  margin: 32px 0 38px;
}

.page-about .about-team__stat {
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.page-about .about-team__stat--focus {
  border-left-color: var(--lime);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 5vw, 62px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-team__stat--focus .about-team__num {
  color: var(--lime);
}

.page-about .about-team__key {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-crew__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-crew__item:last-child {
  border-bottom: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .about-crew__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 4px 28px;
    align-items: start;
    padding: 24px 0;
  }
}

.page-about .about-crew__name {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 口径铁律 ---------- */
.page-about .about-rules {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}

.page-about .about-rule {
  position: relative;
  padding: 24px 24px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-about .about-rule__num {
  position: absolute;
  left: 24px;
  top: 22px;
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.page-about .about-rule__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 1.9vw, 23px);
  color: var(--ink);
}

.page-about .about-rule__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-rule__counter {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-rule__counter .mono {
  margin-right: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

@media (min-width: 700px) {
  .page-about .about-rule {
    padding: 26px 30px 24px 76px;
  }

  .page-about .about-rule__num {
    left: 28px;
    top: 24px;
  }
}

.page-about .about-rules__figure {
  max-width: 520px;
  margin: 36px 0 0;
}

/* ---------- 栏目索引 ---------- */
.page-about .about-index {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-index__item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 18px 8px;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-sm);
  transition: background-color 0.18s ease;
}

@media (min-width: 720px) {
  .page-about .about-index__row {
    grid-template-columns: 92px 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 20px;
  }
}

.page-about a.about-index__row:hover {
  background: var(--panel);
}

.page-about .about-index__row--current {
  background: var(--panel);
}

.page-about .about-index__route {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.page-about .about-index__row--current .about-index__route {
  color: var(--lime);
}

.page-about .about-index__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.page-about .about-index__desc {
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 窄屏保底 ---------- */
@media (max-width: 520px) {
  .page-about .about-rule {
    padding: 62px 20px 20px;
  }

  .page-about .about-rule__num {
    left: 20px;
    top: 20px;
  }

  .page-about .about-stage {
    padding: 20px 18px;
  }

  .page-about .about-open__facts {
    grid-template-columns: 1fr 1fr;
  }
}
<<<END>>>