.page-about {
  --ab-edge: clamp(16px, 3.4vw, 44px);
  color: var(--paper);
  background: var(--ink);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.3);
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

.page-about a:focus-visible,
.page-about [data-to-top]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(30px, 6vw, 84px) 0 clamp(28px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(92% 130% at 6% -12%, rgba(141, 44, 107, 0.42), transparent 62%),
    radial-gradient(70% 90% at 96% 112%, rgba(53, 224, 208, 0.13), transparent 70%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(155, 168, 183, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(155, 168, 183, 0.07) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
}

.page-about .ab-hero__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--ab-edge);
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .ab-kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
}

.page-about .ab-kicker__sep {
  color: var(--stone);
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-size: clamp(34px, 7.2vw, 78px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .ab-hero__desc {
  margin: 0;
  max-width: 54ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
}

.page-about .ab-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 4vw, 44px);
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
  padding-left: 12px;
}

.page-about .ab-hero__num {
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-hero__stats li:nth-child(2) .ab-hero__num {
  color: var(--orange);
}

.page-about .ab-hero__lab {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-hero__figure {
  position: relative;
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  box-shadow: 0 24px 64px -34px rgba(0, 0, 0, 0.95);
}

.page-about .ab-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .ab-hero__cap {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 10px 2px 2px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .ab-hero__capnum {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-shell {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(26px, 4vw, 52px) var(--ab-edge) clamp(50px, 8vw, 96px);
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
}

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

/* ---------- 侧边档案索引 ---------- */
.page-about .ab-index {
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.page-about .ab-index__head {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.page-about .ab-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .ab-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 8px 7px 0;
  border-bottom: 1px solid transparent;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
}

.page-about .ab-index__link:hover {
  color: var(--paper);
  border-bottom-color: rgba(255, 107, 53, 0.55);
}

.page-about .ab-index__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .ab-index__note {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.82;
}

/* ---------- 章节 ---------- */
.page-about .ab-chapter {
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(26px, 4vw, 52px);
  border-top: 1px solid var(--line-soft);
}

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

.page-about .ab-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(10px, 2vw, 20px);
  align-items: start;
  margin-bottom: clamp(14px, 2.4vw, 26px);
}

.page-about .ab-chapter__num {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--orange);
  border: 1px solid rgba(255, 107, 53, 0.42);
  border-radius: 3px;
  padding: 3px 7px;
}

.page-about .ab-chapter__title {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .ab-chapter__lead {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .ab-chapter__body p {
  margin: 0 0 14px;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.85;
}

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

/* ---------- 内容版图列表 ---------- */
.page-about .ab-map {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-map__row {
  display: grid;
  gap: 6px;
  padding: 16px 10px 16px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.2s ease;
}

.page-about .ab-map__row:hover {
  background: rgba(13, 21, 36, 0.8);
}

.page-about .ab-map__k {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .ab-map__v {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 图像 ---------- */
.page-about .ab-figure {
  position: relative;
  margin: clamp(18px, 3vw, 30px) 0;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
}

.page-about .ab-figure--tight {
  margin: 0;
}

.page-about .ab-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .ab-figure__cap {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin: 9px 2px 2px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-figure__tag {
  flex: none;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  padding: 2px 6px;
  border: 1px solid rgba(53, 224, 208, 0.45);
  border-radius: 2px;
  color: var(--cyan);
}

/* ---------- 字段对照表 ---------- */
.page-about .ab-tablewrap {
  margin: clamp(16px, 3vw, 28px) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 3px;
}

.page-about .ab-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .ab-table caption {
  caption-side: top;
  padding: 11px 14px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
  background: rgba(13, 21, 36, 0.7);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-table th {
  padding: 11px 14px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
  background: rgba(43, 50, 58, 0.55);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-table td {
  padding: 12px 14px;
  vertical-align: top;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-table td:first-child {
  color: var(--paper);
  font-weight: 500;
  white-space: nowrap;
}

.page-about .ab-table tbody tr {
  transition: background-color 0.18s ease;
}

.page-about .ab-table tbody tr:hover {
  background: rgba(53, 224, 208, 0.07);
}

.page-about .ab-table tbody tr:hover td:first-child {
  color: var(--cyan);
}

.page-about .ab-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 斜切分隔带 ---------- */
.page-about .ab-slant {
  height: clamp(26px, 4.5vw, 54px);
  margin: clamp(8px, 2vw, 18px) 0;
  clip-path: polygon(0 42%, 100% 0, 100% 58%, 0 100%);
  background: linear-gradient(100deg, rgba(141, 44, 107, 0.55), rgba(13, 21, 36, 0.25) 52%, rgba(53, 224, 208, 0.28));
}

/* ---------- 分栏 ---------- */
.page-about .ab-split {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-bottom: clamp(16px, 3vw, 26px);
}

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

/* ---------- 团队小组 ---------- */
.page-about .ab-crew {
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 28px);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
}

.page-about .ab-crew__item {
  padding: 14px 16px;
  background: var(--panel);
}

.page-about .ab-crew__name {
  margin: 0;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-crew__desc {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 节奏数字 ---------- */
.page-about .ab-beat {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(16px, 3vw, 24px);
  padding: 14px 16px;
  border-left: 2px solid var(--orange);
  background: rgba(141, 44, 107, 0.16);
}

.page-about .ab-beat__num {
  font-family: var(--mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--orange);
}

.page-about .ab-beat__unit {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--paper);
}

.page-about .ab-beat__txt {
  flex: 1 1 240px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 占比数据块 ---------- */
.page-about .ab-stat {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(13, 21, 36, 0.72);
}

.page-about .ab-stat__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .ab-stat__label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-stat__value {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .ab-stat__meter {
  height: 6px;
  border-radius: 3px;
  background: rgba(43, 50, 58, 0.9);
  overflow: hidden;
}

.page-about .ab-stat__fill {
  --yx-meter: 67%;
  display: block;
  width: var(--yx-meter);
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-about .ab-stat__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 协作生态 ---------- */
.page-about .ab-eco {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-eco__item {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(13, 21, 36, 0.92), rgba(5, 7, 12, 0));
}

.page-about .ab-eco__n {
  display: block;
  font-family: var(--mono);
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-eco__item:nth-child(2) .ab-eco__n {
  color: var(--orange);
}

.page-about .ab-eco__k {
  margin: 8px 0 0;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-eco__d {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 更新节奏时间轴 ---------- */
.page-about .ab-rhythm {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
}

.page-about .ab-rhythm::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 224, 208, 0));
}

.page-about .ab-rhythm__item {
  position: relative;
  padding-bottom: 20px;
}

.page-about .ab-rhythm__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-rhythm__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-sizing: border-box;
}

.page-about .ab-rhythm__when {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .ab-rhythm__what {
  margin: 6px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 延伸入口 ---------- */
.page-about .ab-next {
  margin-top: clamp(26px, 4vw, 48px);
  padding-top: clamp(22px, 3.4vw, 36px);
  border-top: 1px solid var(--line);
}

.page-about .ab-next__title {
  margin: 0 0 16px;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: 0.01em;
}

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

.page-about .ab-next__card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(13, 21, 36, 0.6);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .ab-next__card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 107, 53, 0.6);
  background: rgba(17, 28, 46, 0.95);
}

.page-about .ab-next__k {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
  border: 0;
}

.page-about .ab-next__d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  border: 0;
}

/* ---------- 返回顶部 ---------- */
.page-about .ab-backtop {
  border-bottom: 1px solid rgba(53, 224, 208, 0.3);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .ab-crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .ab-eco {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .ab-map__row {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }
}

@media (min-width: 860px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.84fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--shell-top) + 28px);
    max-height: calc(100vh - var(--shell-top) - 56px);
    overflow-y: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-map__row,
  .page-about .ab-table tbody tr,
  .page-about .ab-next__card,
  .page-about a {
    transition: none;
  }

  .page-about .ab-next__card:hover {
    transform: none;
  }
}
<<<END>>>