.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏：酒红封面 ---------- */
.page-about .about-mast {
  position: relative;
  padding: clamp(18px, 4vw, 32px) 0 clamp(30px, 5vw, 52px);
  background:
    radial-gradient(120% 100% at 88% -10%, rgba(232, 69, 43, 0.26), transparent 62%),
    linear-gradient(158deg, var(--wine) 0%, #210d14 44%, var(--ink) 100%);
  border-bottom: var(--bw) solid var(--line);
  overflow: hidden;
}

.page-about .about-mast::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 0;
  width: 46%;
  height: 100%;
  background: repeating-linear-gradient(
    118deg,
    rgba(242, 245, 248, 0.05) 0 1px,
    transparent 1px 18px
  );
  pointer-events: none;
}

.page-about .about-mast__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumbs {
  margin-bottom: clamp(18px, 3vw, 28px);
}

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

.page-about .about-mast__tag {
  display: inline-block;
  margin: 0 0 14px;
}

.page-about .about-mast__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  max-width: 18em;
  text-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
}

.page-about .about-mast__lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 40ch;
  color: var(--paper);
  opacity: 0.92;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(24px, 4vw, 36px) 0 0;
  border: var(--bw) solid var(--line);
  background: rgba(10, 16, 24, 0.55);
}

.page-about .about-facts__cell {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__cell:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.page-about .about-facts__cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin-bottom: 4px;
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--arc);
  font-variant-numeric: tabular-nums;
  margin-right: 4px;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  margin-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list > li {
  flex: 0 0 auto;
}

.page-about .about-index .toc__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: var(--bw) solid var(--line);
  background: rgba(16, 27, 40, 0.7);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-index .toc__link:hover,
.page-about .about-index .toc__link:focus-visible,
.page-about .about-index .toc__link[aria-current="true"] {
  border-color: var(--signal);
  color: var(--signal);
  transform: translateY(-2px);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(44px, 8vw, 92px) 0;
  border-top: var(--bw) solid var(--line);
}

.page-about .about-chapter--deep {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink-3) 100%);
}

.page-about .about-chapter--wine {
  background:
    linear-gradient(96deg, rgba(107, 31, 42, 0.85) 0%, rgba(30, 58, 52, 0.75) 100%);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 6px 14px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-head__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  color: var(--signal);
  padding-top: 8px;
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .about-head__note {
  grid-column: 2;
  margin: 0;
  color: var(--mist);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 01 受众 ---------- */
.page-about .about-audience {
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-audience__item {
  padding: 0 0 20px 16px;
  border-left: 3px solid var(--signal);
  border-bottom: 1px solid var(--line);
}

.page-about .about-audience__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-audience__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-audience__item p {
  margin: 0;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .about-audience__link {
  display: inline-block;
  margin-top: 10px;
  color: var(--arc);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-about .about-audience__link:hover,
.page-about .about-audience__link:focus-visible {
  border-bottom-color: var(--arc);
}

.page-about .about-now {
  align-self: start;
  padding: clamp(18px, 3vw, 26px);
  background: var(--ink-3);
  box-shadow: var(--shadow-hard);
}

.page-about .about-now__big {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.1;
  color: var(--ember);
}

.page-about .about-now__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.85;
}

.page-about .about-now__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  text-decoration: none;
}

/* ---------- 02 主线 ---------- */
.page-about .about-lanes {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--bw) solid var(--line);
}

.page-about .about-lanes__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 10px 12px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 160ms var(--ease);
}

.page-about .about-lanes__row:hover {
  background: rgba(47, 216, 230, 0.05);
}

.page-about .about-lanes__idx {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-lanes__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-lanes__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.85;
  max-width: 46ch;
}

.page-about .about-lanes__meta {
  grid-column: 2;
  justify-self: start;
  align-self: start;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 3.5vw, 36px);
}

.page-about .about-team__figure {
  margin: 0;
  aspect-ratio: 3 / 4;
  max-height: 480px;
  border: var(--bw) solid var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-team__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 30px);
  padding: 0;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-role:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-role__count {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--arc);
  font-variant-numeric: tabular-nums;
}

.page-about .about-role__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .about-rhythm {
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--ink-3);
}

.page-about .about-rhythm__title {
  margin: 0 0 12px;
  color: var(--arc);
}

.page-about .about-rhythm__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rhythm__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .about-rhythm__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-rhythm__key {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .about-rhythm__val {
  color: var(--paper);
  opacity: 0.88;
}

/* ---------- 04 覆盖 ---------- */
.page-about .about-coverage__figure {
  margin: 0 0 clamp(22px, 3.5vw, 34px);
  aspect-ratio: 8 / 3;
  border: var(--bw) solid var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-coverage__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-matrix-wrap {
  overflow-x: auto;
  border: var(--bw) solid var(--line);
  background: rgba(10, 16, 24, 0.5);
}

.page-about .about-matrix {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-matrix caption {
  padding: 12px 14px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}

.page-about .about-matrix th,
.page-about .about-matrix td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-about .about-matrix thead th {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: rgba(16, 27, 40, 0.9);
}

.page-about .about-matrix tbody th {
  font-weight: 700;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .about-matrix tbody td {
  color: var(--paper);
}

.page-about .about-matrix tbody td.num {
  font-family: var(--font-mono);
  color: var(--arc);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-matrix tbody tr {
  transition: background-color 160ms var(--ease);
}

.page-about .about-matrix tbody tr:hover {
  background: rgba(232, 69, 43, 0.12);
}

.page-about .about-matrix__reveal {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}

.page-about .about-matrix tbody tr:hover .about-matrix__reveal {
  max-height: 80px;
  opacity: 1;
  margin-top: 6px;
}

.page-about .about-coverage__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.85;
}

/* ---------- 05 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: var(--bw) solid var(--wine);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 42px) 6px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: var(--bw) solid var(--signal);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.85;
}

.page-about .about-almanac {
  display: grid;
  gap: 16px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line);
}

.page-about .about-almanac__img {
  width: 100%;
  max-width: 280px;
  border: var(--bw) solid var(--line);
  box-shadow: var(--shadow-soft);
}

.page-about .about-almanac__cap {
  align-self: end;
}

.page-about .about-almanac__cap p {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.85;
}

/* ---------- 06 承诺 ---------- */
.page-about .about-promises {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--bw) solid var(--line);
}

.page-about .about-promise {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px 14px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-promise__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--signal);
  padding-top: 4px;
}

.page-about .about-promise__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-promise__body p {
  margin: 0;
  max-width: 50ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.85;
}

.page-about .about-promise__link {
  grid-column: 2;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.page-about .about-outro {
  margin: clamp(24px, 4vw, 36px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-outro__link {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-about .about-outro__link:hover,
.page-about .about-outro__link:focus-visible {
  border-bottom-color: var(--ember);
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 420px) {
  .page-about .about-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-facts__cell {
    border-right: 0 !important;
    border-bottom: 1px solid var(--line) !important;
  }

  .page-about .about-facts__cell:last-child {
    border-bottom: 0 !important;
  }

  .page-about .about-rhythm__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }
}

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

  .page-about .about-facts__cell {
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-facts__cell:last-child {
    border-right: 0;
  }

  .page-about .about-audience {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    display: grid;
    align-items: start;
  }

  .page-about .about-lanes__row {
    grid-template-columns: 52px minmax(0, 1fr) auto;
    align-items: start;
  }

  .page-about .about-lanes__meta {
    grid-column: 3;
    justify-self: end;
  }

  .page-about .about-promise {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-promise__link {
    grid-column: 3;
    justify-self: end;
  }

  .page-about .about-almanac {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-mast {
    padding-top: 30px;
  }

  .page-about .about-mast__inner {
    padding-left: clamp(24px, 4vw, 44px);
  }

  .page-about .about-side-mark {
    display: block;
    position: absolute;
    left: -14px;
    top: 34%;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.28em;
    color: var(--mist);
    opacity: 0.75;
    pointer-events: none;
  }

  .page-about .about-index__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    aspect-ratio: 3 / 4;
    max-height: none;
    position: sticky;
    top: 96px;
  }

  .page-about .about-role {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
  }

  .page-about .about-role__count {
    font-size: 38px;
  }

  .page-about .about-timeline {
    padding-left: 26px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    padding-left: 14px;
  }

  .page-about .about-timeline__year {
    font-size: 24px;
    margin-bottom: 0;
    text-align: right;
  }

  .page-about .about-timeline__item::before {
    left: -9px;
    top: 8px;
    width: 14px;
    height: 14px;
  }
}
<<<END>>>