.page-about {
  --ab-line: var(--c-rule);
  --ab-gap: clamp(64px, 10vw, 136px);
}

.page-about .ab-chapter,
.page-about .ab-hero {
  scroll-margin-top: 120px;
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(48px, 7vw, 84px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(35, 56, 107, 0.42) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(35, 56, 107, 0.42) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .ab-hero__frame {
  position: relative;
  border: 1px solid var(--ab-line);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(29, 91, 255, 0.22) 0%, transparent 58%),
    linear-gradient(158deg, rgba(10, 22, 48, 0.94) 0%, rgba(5, 11, 26, 0.97) 68%);
  padding: clamp(24px, 4vw, 56px);
  box-shadow: var(--shadow-deep);
}

.page-about .ab-hero__frame::before,
.page-about .ab-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--c-cyan);
  pointer-events: none;
}

.page-about .ab-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .ab-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-void);
  background: var(--c-paper);
  padding: 5px 12px;
}

.page-about .ab-hero__title {
  margin: 18px 0 0;
  font-size: clamp(28px, 5.6vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-text);
  font-weight: 900;
}

.page-about .ab-em {
  font-style: normal;
  color: var(--c-cyan);
}

.page-about .ab-hero__lead {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .ab-facts {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .ab-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  background: var(--c-void);
  padding: 13px 16px;
}

.page-about .ab-fact__key {
  font-size: 13px;
  color: var(--c-muted);
  order: 1;
}

.page-about .ab-fact__num {
  margin: 0;
  order: 2;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: 0.02em;
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapter {
  padding: var(--ab-gap) 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-chapter__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-about .ab-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-void);
  background: var(--c-paper);
  padding: 4px 11px;
  margin-bottom: 14px;
}

.page-about .ab-chapter__title {
  margin: 0;
  font-size: clamp(21px, 2.9vw, 31px);
  line-height: 1.3;
  color: var(--c-text);
  font-weight: 900;
}

.page-about .ab-chapter__side {
  position: relative;
  padding-left: 14px;
}

.page-about .ab-chapter__side::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: linear-gradient(180deg, var(--c-blue) 0%, var(--c-cyan) 100%);
}

.page-about .ab-chapter__body > .prose {
  margin: 0 0 22px;
  color: var(--c-text);
  font-size: clamp(15px, 1.55vw, 17px);
}

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

/* ---------- 图片 ---------- */
.page-about .ab-media {
  margin: 28px 0;
  border: 1px solid var(--ab-line);
  background: var(--c-panel);
  overflow: hidden;
}

.page-about .ab-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-media .media-caption {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--ab-line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 数据流程 ---------- */
.page-about .ab-flow {
  list-style: none;
  margin: 30px 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .ab-flow__item {
  position: relative;
  background: var(--c-void);
  padding: 22px 20px 24px;
}

.page-about .ab-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
  margin-bottom: 12px;
}

.page-about .ab-step__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--c-cyan);
  background: transparent;
}

.page-about .ab-flow__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--c-text);
}

.page-about .ab-flow__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}

/* ---------- 团队分工 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-about .ab-roles {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-role__name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-about .ab-role__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-about .ab-media--side {
  margin-top: 0;
}

/* ---------- 时间线 ---------- */
.page-about .ab-chapter--wide .ab-chapter__body {
  padding-top: 4px;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-blue) 0%, var(--c-cyan) 62%, var(--c-orange) 100%);
}

.page-about .ab-timeline__item {
  position: relative;
  padding-left: 46px;
  padding-bottom: 30px;
}

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

.page-about .ab-timeline__node {
  position: absolute;
  left: 0;
  top: 2px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--c-void);
  border: 2px solid var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--c-cyan);
}

.page-about .ab-timeline__item:nth-child(4) .ab-timeline__node {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.page-about .ab-timeline__card {
  border-left: 1px solid var(--ab-line);
  background: linear-gradient(120deg, rgba(10, 22, 48, 0.72) 0%, rgba(5, 11, 26, 0.3) 100%);
  padding: 16px 18px;
}

.page-about .ab-timeline__title {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--c-text);
}

.page-about .ab-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 覆盖范围 ---------- */
.page-about .ab-scale {
  margin: 30px 0 26px;
  padding: 22px 20px;
  border: 1px solid var(--ab-line);
  background: var(--c-panel);
}

.page-about .ab-scale__bar {
  height: 74px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--c-cyan) 0 2px,
    transparent 2px 3.2258%
  );
  background-repeat: repeat;
}

.page-about .ab-scale__label {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}

.page-about .ab-tiers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .ab-tier {
  border: 1px solid var(--ab-line);
  background: var(--c-void);
  padding: 18px;
}

.page-about .ab-tier p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}

/* ---------- 合作 CTA ---------- */
.page-about .ab-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .ab-flow__item:nth-child(2n) {
    border-right: 0;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(260px, 4fr);
    align-items: end;
  }

  .page-about .ab-chapter__inner {
    grid-template-columns: minmax(190px, 3fr) minmax(0, 8fr);
    gap: clamp(34px, 5vw, 76px);
  }

  .page-about .ab-chapter__side {
    position: sticky;
    top: 120px;
    align-self: start;
  }

  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    background: transparent;
    border: 0;
    gap: 0;
    position: relative;
  }

  .page-about .ab-flow::before {
    content: "";
    position: absolute;
    left: 20px;
    right: 20px;
    top: 26px;
    height: 2px;
    background: linear-gradient(90deg, var(--c-rule) 0%, var(--c-cyan) 100%);
  }

  .page-about .ab-flow__item {
    background: transparent;
    border: 0;
    border-right: 1px solid var(--ab-line);
    padding: 0 20px 0 0;
  }

  .page-about .ab-flow__item:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .ab-flow__item:nth-child(n) {
    border-bottom: 0;
  }

  .page-about .ab-step {
    background: var(--c-void);
    padding-right: 10px;
    margin-bottom: 16px;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .ab-media--side {
    margin-top: 2px;
  }

  .page-about .ab-timeline__item {
    padding-left: 56px;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</｜｜DSML｜｜ calls>