.page-about {
  --pa-bg: var(--mist);
  --pa-surface: #FBF8F1;
  --pa-ink: var(--ink);
  --pa-body: #23282F;
  --pa-mute: #5B6470;
  --pa-line: rgba(11, 13, 16, 0.13);
  --pa-line-2: rgba(11, 13, 16, 0.3);
  --pa-ember: var(--ember);
  --pa-gold: var(--gold);
  --pa-focus: #0C8A80;
  --pa-shadow: 0 20px 40px -34px rgba(11, 13, 16, 0.7);
  background-color: var(--pa-bg);
  color: var(--pa-body);
  font-family: var(--font-body);
}

.page-about a:focus-visible {
  outline: 2px solid var(--pa-focus);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(1.75rem, 5vw, 3.5rem));
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
  background:
    linear-gradient(180deg, rgba(255, 90, 31, 0.07), rgba(255, 90, 31, 0) 62%),
    repeating-linear-gradient(90deg, rgba(11, 13, 16, 0.045) 0 1px, transparent 1px 72px),
    var(--pa-bg);
  border-bottom: 1px solid var(--pa-line-2);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--pa-ember), rgba(244, 183, 64, 0.5) 34%, transparent 70%);
  pointer-events: none;
}

.page-about .crumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-ui);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.page-about .crumbs__link {
  color: var(--pa-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .crumbs__link:hover {
  color: var(--pa-ink);
  border-bottom-color: var(--pa-ember);
}

.page-about .crumbs__sep {
  color: var(--pa-line-2);
}

.page-about .crumbs__now {
  color: var(--pa-ink);
  font-weight: 600;
}

.page-about .eyebrow {
  margin: 0 0 0.9rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pa-ember);
}

.page-about .display {
  margin: 0 0 clamp(1rem, 2.4vw, 1.6rem);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.4vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--pa-ink);
  max-width: 22ch;
}

.page-about .display .tilt {
  display: inline-block;
  transform: rotate(-3deg);
  transform-origin: left center;
  background: linear-gradient(transparent 64%, rgba(255, 90, 31, 0.34) 64%);
  padding-inline: 0.08em;
}

.page-about .lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.9vw, 1.12rem);
  line-height: 1.9;
  color: var(--pa-body);
  padding-left: clamp(0.9rem, 2vw, 1.25rem);
  border-left: 2px solid var(--pa-gold);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding-block: clamp(2.25rem, 5.5vw, 4.5rem);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 左侧刻度轨 ---------- */
.page-about .about-rail {
  padding-top: 0.85rem;
  border-top: 1px solid var(--pa-line-2);
}

.page-about .about-rail__tag {
  margin: 0 0 0.85rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pa-mute);
}

.page-about .about-rail__list {
  display: flex;
  flex-direction: row;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.42rem 0.7rem;
  white-space: nowrap;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--pa-mute);
  text-decoration: none;
  border-bottom: 2px solid var(--pa-line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover {
  color: var(--pa-ink);
  border-bottom-color: var(--pa-ember);
  background: rgba(255, 90, 31, 0.07);
}

.page-about .about-rail__num {
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--pa-ember);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-block: clamp(1.75rem, 4vw, 2.6rem);
  border-top: 1px solid var(--pa-line);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-about .about-flow > .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.95rem;
  padding: 0.26rem 0.62rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--pa-ink);
  background: rgba(11, 13, 16, 0.055);
  border: 1px solid var(--pa-line);
}

.page-about .about-section__tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--pa-ember);
  transform: rotate(45deg);
}

.page-about .about-section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--pa-ink);
}

.page-about .about-section h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0;
  color: var(--pa-ink);
}

.page-about .about-section p {
  margin: 0 0 1rem;
  font-size: 1.04rem;
  line-height: 1.9;
  color: var(--pa-body);
  max-width: 64ch;
}

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

.page-about .about-note {
  margin-top: 1.1rem !important;
  padding: 0.85rem 1rem;
  font-size: 0.94rem !important;
  line-height: 1.8;
  color: var(--pa-mute) !important;
  border-left: 2px solid var(--pa-gold);
  background: rgba(244, 183, 64, 0.1);
}

/* ---------- 图文排布 ---------- */
.page-about .about-media-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
  margin-bottom: 0.5rem;
}

.page-about .about-media-row__text {
  min-width: 0;
}

.page-about .about-figure {
  margin: 1.4rem 0 0;
}

.page-about .about-figure--wide {
  max-width: 100%;
}

.page-about .frame-media {
  position: relative;
  box-shadow: var(--pa-shadow);
}

.page-about .frame-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.04);
}

.page-about .media-caption {
  margin: 0.6rem 0 0;
  padding-left: 0.62rem;
  border-left: 2px solid var(--pa-ember);
  font-family: var(--font-ui);
  font-size: 0.76rem;
  line-height: 1.65;
  letter-spacing: 0.03em;
  color: var(--pa-mute);
}

/* ---------- 数据带 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--pa-line);
  border: 1px solid var(--pa-line);
}

.page-about .about-stats li {
  background: var(--pa-surface);
  padding: 0.95rem 0.9rem 1.05rem;
}

.page-about .about-stats .num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.45rem, 3.4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--pa-ink);
}

.page-about .about-stats .num em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--pa-ember);
  margin-left: 0.1em;
}

.page-about .about-stats .lbl {
  display: block;
  margin-top: 0.32rem;
  font-family: var(--font-ui);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--pa-mute);
}

/* ---------- 团队角色手风琴 ---------- */
.page-about .about-desks {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.3rem;
}

.page-about .about-desk {
  border: 1px solid var(--pa-line);
  border-left: 3px solid var(--pa-line-2);
  background: rgba(255, 255, 255, 0.56);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-desk:hover,
.page-about .about-desk[open] {
  border-left-color: var(--pa-ember);
}

.page-about .about-desk[open] {
  background: #FFFFFF;
}

.page-about .about-desk__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-ui);
}

.page-about .about-desk__head::-webkit-details-marker {
  display: none;
}

.page-about .about-desk__head:focus-visible {
  outline: 2px solid var(--pa-focus);
  outline-offset: -2px;
}

.page-about .about-desk__count {
  min-width: 2ch;
  font-family: var(--font-data);
  font-size: 1.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--pa-ember);
}

.page-about .about-desk__role {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--pa-ink);
}

.page-about .about-desk__cue {
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--pa-mute);
  border-bottom: 2px solid var(--pa-mute);
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-desk[open] .about-desk__cue {
  transform: rotate(-135deg) translateY(-2px);
  border-color: var(--pa-ember);
}

.page-about .about-desk__body {
  padding: 0 1rem 1rem;
}

.page-about .about-desk__body p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--pa-body);
}

/* ---------- 校对表格 ---------- */
.page-about .table-scroll {
  margin-top: 1.4rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-about .about-check {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  text-align: left;
  font-family: var(--font-ui);
  font-size: 0.86rem;
  background: transparent;
}

.page-about .about-check caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 0.65rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pa-mute);
}

.page-about .about-check th {
  padding: 0.55rem 0.7rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pa-mute);
  white-space: nowrap;
  border-bottom: 1px solid var(--pa-line-2);
}

.page-about .about-check td {
  padding: 0.75rem 0.7rem;
  vertical-align: top;
  line-height: 1.65;
  color: var(--pa-body);
  border-bottom: 1px solid var(--pa-line);
}

.page-about .about-check td:first-child {
  font-weight: 700;
  color: var(--pa-ink);
  white-space: nowrap;
}

.page-about .about-check tbody tr {
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-check tbody tr:hover {
  background: rgba(255, 90, 31, 0.07);
}

/* ---------- 版本列表 ---------- */
.page-about .about-versions {
  margin: 1.5rem 0 1.2rem;
  padding: 0;
  list-style: none;
}

.page-about .about-versions li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.3rem;
  padding: 0.9rem 0 0.9rem 0.95rem;
  border-top: 1px solid var(--pa-line);
  border-left: 2px solid var(--pa-gold);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-versions li:hover {
  border-left-color: var(--pa-ember);
  background: rgba(244, 183, 64, 0.08);
}

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

.page-about .about-versions__k {
  font-family: var(--font-data);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--pa-ember);
}

.page-about .about-versions p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--pa-mute);
}

/* ---------- 协作数字 ---------- */
.page-about .about-partners {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin: 1.35rem 0;
  padding: 0;
  list-style: none;
  background: var(--pa-line);
  border: 1px solid var(--pa-line);
}

.page-about .about-partners li {
  flex: 1 1 9rem;
  background: var(--pa-surface);
  padding: 0.9rem 0.95rem 1rem;
}

.page-about .about-partners .num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--pa-ink);
}

.page-about .about-partners .lbl {
  display: block;
  margin-top: 0.25rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--pa-mute);
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-top: clamp(1.5rem, 4vw, 2.25rem);
  border-top: 2px solid var(--pa-ember);
  position: relative;
}

.page-about .about-close::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 34%;
  height: 2px;
  background: linear-gradient(90deg, var(--pa-gold), var(--pa-ember));
}

.page-about .about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.78rem 1.2rem;
  font-family: var(--font-ui);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--mist);
  background: var(--pa-ink);
  border: 1px solid var(--pa-ink);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-cta:hover {
  background: var(--pa-ember);
  border-color: var(--pa-ember);
  color: var(--pa-ink);
  transform: translateY(-2px);
}

.page-about .about-cta--line {
  background: transparent;
  color: var(--pa-ink);
  border-color: var(--pa-line-2);
}

.page-about .about-cta--line:hover {
  background: var(--pa-ink);
  color: var(--mist);
  border-color: var(--pa-ink);
}

.page-about .about-fineprint {
  margin-top: 1.15rem !important;
  font-size: 0.92rem !important;
  line-height: 1.85;
  color: var(--pa-mute) !important;
}

.page-about .about-fineprint a {
  color: var(--pa-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--pa-ember);
  transition: color var(--dur) var(--ease);
}

.page-about .about-fineprint a:hover {
  color: var(--pa-ember);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-versions li {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: 1.1rem;
    align-items: start;
  }

  .page-about .about-versions__k {
    padding-top: 0.15rem;
  }
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-media-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  }

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

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0.12rem;
    padding-bottom: 0;
    overflow-x: visible;
  }

  .page-about .about-rail__link {
    grid-template-columns: 2.2rem minmax(0, 1fr);
    padding: 0.55rem 0.55rem 0.55rem 0.05rem;
    border-bottom: 0;
    border-left: 2px solid var(--pa-line);
  }

  .page-about .about-rail__link:hover {
    border-bottom-color: transparent;
    border-left-color: var(--pa-ember);
  }
}

@media (min-width: 1280px) {
  .page-about .display {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cta:hover {
    transform: none;
  }
}
<<<END>>>