.page-about {
  --about-hair: rgba(198, 169, 107, 0.22);
  --about-hair-soft: rgba(198, 169, 107, 0.12);
  --about-panel: rgba(16, 48, 60, 0.72);
  --about-notch: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  padding-bottom: 0;
}

.page-about section[id],
.page-about .tl-item {
  scroll-margin-top: 92px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 9vw, 104px) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(55, 228, 212, 0.12), transparent 62%),
    linear-gradient(180deg, var(--deep) 0%, var(--ink) 78%);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -80px;
  width: 62%;
  height: 160px;
  background: linear-gradient(90deg, rgba(123, 46, 62, 0.32), rgba(59, 59, 122, 0.22));
  transform: skewY(-5deg);
  pointer-events: none;
}

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

.page-about .about-hero .crumb {
  margin-bottom: 26px;
}

.page-about .about-hero h1 {
  max-width: 20ch;
  margin: 10px 0 20px;
  font-family: var(--font-head);
  font-size: clamp(34px, 7vw, 58px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  color: rgba(238, 243, 246, 0.82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-kpi {
  padding: 16px 16px 14px;
  background: var(--about-panel);
  border: 1px solid var(--about-hair-soft);
  border-left: 3px solid var(--cyan);
  clip-path: var(--about-notch);
}

.page-about .about-kpi:nth-child(3),
.page-about .about-kpi:nth-child(4) {
  border-left-color: var(--gold);
}

.page-about .about-kpi__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.page-about .about-kpi__num small {
  margin-left: 2px;
  font-size: 0.44em;
  font-weight: 500;
  color: var(--cyan);
}

.page-about .about-kpi__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

/* ---------- 通用两栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 5vw, 48px);
  align-items: start;
  margin-top: 32px;
}

.page-about .about-split .media {
  margin: 0;
}

.page-about .about-origin .prose p + p {
  margin-top: 16px;
}

.page-about .about-points {
  margin: 22px 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-points li {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  font-size: 16px;
  color: rgba(238, 243, 246, 0.84);
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-points__mark {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-points b {
  color: var(--mist);
  font-weight: 600;
}

/* ---------- 时间轴 ---------- */
.page-about .about-track__lede {
  max-width: 66ch;
  margin-top: 20px;
}

.page-about .about-axis {
  display: flex;
  gap: 10px;
  margin: 26px 0 40px;
  padding-bottom: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-axis a {
  flex: 0 0 auto;
  padding: 9px 14px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--mist);
  background: rgba(16, 48, 60, 0.82);
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-axis a:hover,
.page-about .about-axis a:focus-visible {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 46px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(55, 228, 212, 0.45) 60%, var(--indigo));
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 28px;
}

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

.page-about .tl-node {
  position: absolute;
  top: 12px;
  left: -38px;
  width: 16px;
  height: 16px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(55, 228, 212, 0.12);
}

.page-about .tl-card {
  position: relative;
  padding: 22px 22px 18px;
  background: linear-gradient(160deg, rgba(16, 48, 60, 0.9), rgba(10, 26, 40, 0.94));
  border-top: 3px solid var(--wine);
  clip-path: var(--about-notch);
}

.page-about .tl-item:nth-child(even) .tl-card {
  border-top-color: var(--indigo);
}

.page-about .tl-year {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .tl-card > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(238, 243, 246, 0.78);
}

.page-about .tl-details {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--about-hair-soft);
}

.page-about .tl-details summary {
  cursor: pointer;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  list-style: none;
}

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

.page-about .tl-details summary::before {
  content: "+ ";
  font-family: var(--font-num);
  font-weight: 700;
}

.page-about .tl-details[open] summary::before {
  content: "− ";
}

.page-about .tl-details p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(238, 243, 246, 0.72);
}

/* ---------- 团队 ---------- */
.page-about .about-team__lede {
  max-width: 68ch;
  margin-top: 20px;
}

.page-about .team-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 30px;
}

.page-about .team-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-filter__label {
  display: inline-block;
  padding: 9px 16px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--mist);
  background: rgba(16, 48, 60, 0.8);
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .team-filter__label:hover {
  border-color: var(--cyan);
}

.page-about .team-filter__input:checked + .team-filter__label {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 600;
}

.page-about .team-filter__input:focus-visible + .team-filter__label {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

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

.page-about .team-card {
  padding: 20px 20px 22px;
  background: var(--about-panel);
  border: 1px solid var(--about-hair-soft);
  border-left: 3px solid var(--gold);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .team-card[data-role="review"],
.page-about .team-card[data-role="data"] {
  border-left-color: var(--indigo);
}

.page-about .team-card[data-role="ux"] {
  border-left-color: var(--cyan);
}

.page-about .team-card[data-role="support"] {
  border-left-color: var(--orange);
}

.page-about .team-card:hover {
  transform: translateX(4px);
}

.page-about .team-card__count {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-about .team-card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(238, 243, 246, 0.78);
}

.page-about .about-team__media {
  margin: 34px 0 0;
}

.page-about:has(#team-edit:checked) .team-card:not([data-role="edit"]),
.page-about:has(#team-review:checked) .team-card:not([data-role="review"]),
.page-about:has(#team-ux:checked) .team-card:not([data-role="ux"]),
.page-about:has(#team-data:checked) .team-card:not([data-role="data"]),
.page-about:has(#team-support:checked) .team-card:not([data-role="support"]) {
  display: none;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach__media {
  margin: 0;
}

.page-about .about-board {
  padding: 24px 22px 20px;
}

.page-about .about-board .board__summary {
  margin: 0 0 18px;
  font-size: 16.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-board .board__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .board__label {
  margin: 0 0 8px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-board .board__col p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(238, 243, 246, 0.76);
}

.page-about .about-board .board__links {
  margin: 20px 0 0;
  padding-top: 14px;
  font-size: 14px;
  color: var(--graphite);
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-board .board__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 228, 212, 0.4);
}

.page-about .about-board .board__links a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 合作与版本 ---------- */
.page-about .about-eco__intro {
  max-width: 76ch;
  margin-top: 26px;
}

.page-about .about-table {
  margin-top: 26px;
}

.page-about .about-table table.data {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-table caption {
  padding-bottom: 12px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-align: left;
  color: var(--graphite);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-hair-soft);
  color: rgba(238, 243, 246, 0.8);
}

.page-about .about-table thead th {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-table tbody th {
  color: var(--mist);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .about-table .num {
  font-family: var(--font-num);
  font-size: 17px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-eco__links {
  margin: 20px 0 0;
  font-size: 15px;
  color: var(--graphite);
}

.page-about .about-eco__links a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .about-eco__links a:hover {
  color: var(--orange);
}

/* ---------- 未来一年 ---------- */
.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.page-about .next-card {
  position: relative;
  padding: 24px 22px 26px;
  background: linear-gradient(150deg, rgba(16, 48, 60, 0.88), rgba(10, 26, 40, 0.92));
  border-top: 3px solid var(--indigo);
  clip-path: var(--about-notch);
}

.page-about .next-card:nth-child(2) {
  border-top-color: var(--wine);
}

.page-about .next-card:nth-child(3) {
  border-top-color: var(--cyan);
}

.page-about .next-card__index {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: rgba(198, 169, 107, 0.55);
  font-variant-numeric: tabular-nums;
}

.page-about .next-card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .next-card p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(238, 243, 246, 0.78);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 7vw, 80px);
  padding: clamp(38px, 6vw, 64px) 0;
  background:
    linear-gradient(90deg, rgba(123, 46, 62, 0.28), rgba(59, 59, 122, 0.24)),
    var(--deep);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.page-about .about-cta__text h2 {
  margin: 8px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-cta__text p:last-child {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(238, 243, 246, 0.8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

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

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

  .page-about .about-board .board__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 40px;
  }
}

@media (min-width: 980px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  }

  .page-about .about-split--reverse .about-reach__media {
    order: 1;
  }

  .page-about .about-split--reverse .about-board {
    order: 2;
  }

  .page-about .timeline {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 84px;
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .tl-item {
    padding-left: 0;
  }

  .page-about .tl-item:nth-child(odd) {
    grid-column: 1;
  }

  .page-about .tl-item:nth-child(even) {
    grid-column: 2;
  }

  .page-about .tl-item:nth-child(odd) .tl-node {
    left: auto;
    right: -50px;
  }

  .page-about .tl-item:nth-child(even) .tl-node {
    left: -50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card:hover {
    transform: none;
  }

  .page-about .about-axis a,
  .page-about .team-filter__label,
  .page-about .team-card {
    transition: none;
  }
}
<<<END>>>