.page-about {
  --ab-gap: clamp(18px, 3vw, 32px);
  color: var(--ice);
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* 面包屑 */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: clamp(16px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist-dim);
}
.page-about .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .crumbs a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}
.page-about .crumb-sep {
  color: var(--line);
}
.page-about .crumbs [aria-current="page"] {
  color: var(--ice);
}

/* 首屏 */
.page-about .ab-hero {
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(30px, 5vw, 62px);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 14em;
}
.page-about .ab-hero-lede {
  margin: clamp(18px, 2.5vw, 26px) 0 0;
  max-width: 58ch;
  font-size: clamp(15.5px, 1.55vw, 17.5px);
  line-height: 1.85;
  color: var(--mist);
}

/* 首屏数据条 */
.page-about .ab-hero-facts {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .ab-hero-facts > div {
  background: var(--abyss);
  padding: 14px 15px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .ab-hero-facts dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist-dim);
}
.page-about .ab-hero-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: var(--cyan);
}

/* 起点 */
.page-about .ab-origin {
  padding-top: clamp(40px, 6vw, 76px);
}
.page-about .ab-origin-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .ab-origin-text .h2 {
  margin-top: 12px;
}
.page-about .ab-origin-text p {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .ab-note-rail {
  border-left: 1px solid var(--line);
  padding: 4px 0 4px 18px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-dim);
}
.page-about .ab-note-rail p {
  margin: 0;
}
.page-about .ab-rail-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral);
  margin-bottom: 8px;
}

/* 图片 */
.page-about .ab-shot {
  margin: 0 0 clamp(26px, 4vw, 44px);
  border: 1px solid var(--line-soft);
  background: var(--navy);
}
.page-about .ab-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist-dim);
}

/* 年份轴 */
.page-about .ab-timeline {
  padding-top: clamp(40px, 6vw, 76px);
}
.page-about .ab-stage {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
}
.page-about .stage-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-about .stage-year {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}
.page-about .stage-year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-soft);
}
.page-about .stage-body {
  position: relative;
  margin-left: 3px;
  padding: 12px 0 clamp(26px, 3vw, 38px) 20px;
  border-left: 1px solid var(--line-soft);
}
.page-about .stage-body::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 18px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--abyss);
  box-shadow: 0 0 0 1px var(--line);
}
.page-about .stage-item:last-child .stage-body {
  padding-bottom: 0;
}
.page-about .stage-body h3 {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  font-weight: 700;
  color: var(--ice);
}
.page-about .stage-body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* 团队 */
.page-about .ab-team {
  background: var(--navy);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-team-grid {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}
.page-about .ab-team-total {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--abyss);
}
.page-about .ab-big {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 7vw, 4.8rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.page-about .ab-total-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .ab-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-crew-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.2s var(--ease);
}
.page-about .ab-crew-row:hover {
  background: rgba(47, 227, 194, 0.05);
}
.page-about .ab-crew-num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1.2;
  color: var(--ice);
}
.page-about .ab-crew-name {
  align-self: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
}
.page-about .ab-crew-desc {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-dim);
}

/* 复核流程条 */
.page-about .ab-process {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .ab-process li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--abyss);
}
.page-about .ab-process .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral);
}
.page-about .ab-process p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 覆盖数据 */
.page-about .ab-cov-grid {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .ab-cov-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.5vw, 26px);
  background: var(--abyss);
}
.page-about .ab-cov-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
}
.page-about .ab-cov-num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ice);
}
.page-about .ab-cov-card--lead .ab-cov-num {
  color: var(--cyan);
}
.page-about .ab-cov-card--accent .ab-cov-num {
  color: var(--coral);
}

/* 合作生态 */
.page-about .ab-eco-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .ab-eco-lede {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .ab-eco .ab-shot {
  margin-bottom: 0;
}
.page-about .ab-tags {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .ab-tag {
  padding: 9px 14px;
  border: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ice);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .ab-tag:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-about .ab-honors {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .ab-honors li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-honors .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--coral);
}

/* 协作方式 */
.page-about .ab-teamnote-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .ab-teamnote .ab-shot {
  margin-bottom: 0;
}
.page-about .ab-teamnote-text .h2 {
  margin-top: 12px;
}
.page-about .ab-teamnote-text p {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* 合作联络 */
.page-about .ab-cta {
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .ab-cta-inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .ab-cta-lede {
  margin: 18px 0 clamp(20px, 3vw, 28px);
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .ab-mail-preview {
  padding: clamp(18px, 2.5vw, 26px);
  border: 1px solid var(--line);
  background: var(--abyss);
}
.page-about .ab-mail-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-dim);
}
.page-about .ab-mail-preview ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .ab-mail-preview li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ice);
}
.page-about .ab-mail-preview li .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  padding-top: 3px;
}
.page-about .ab-mail-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist-dim);
}

/* 底部索引 */
.page-about .ab-links {
  margin-top: clamp(30px, 5vw, 56px);
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .ab-links a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--abyss);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ice);
  text-decoration: none;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .ab-links a:hover {
  background: var(--navy);
  color: var(--cyan);
}
.page-about .ab-links .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-dim);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-about .ab-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-cov-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-process {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .ab-origin-grid {
    grid-template-columns: 1.5fr 0.75fr;
    align-items: start;
  }
  .page-about .stage-item {
    grid-template-columns: 148px minmax(0, 1fr);
  }
  .page-about .stage-year {
    justify-content: flex-end;
    padding-right: 22px;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
  }
  .page-about .stage-year::after {
    display: none;
  }
  .page-about .stage-body {
    padding-left: 34px;
  }
  .page-about .ab-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-team-grid {
    grid-template-columns: 0.85fr 1.6fr;
    align-items: start;
  }
  .page-about .ab-crew-row {
    grid-template-columns: 72px 150px minmax(0, 1fr);
    align-items: center;
  }
  .page-about .ab-crew-desc {
    grid-column: auto;
  }
  .page-about .ab-eco-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }
  .page-about .ab-teamnote-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
  }
  .page-about .ab-cta-inner {
    grid-template-columns: 1fr 0.9fr;
    align-items: start;
  }
}
<<<END>>>