.page-about {
  --about-track-w: 200px;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* 首屏 */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 40px);
  margin-top: clamp(16px, 2.5vw, 28px);
  align-items: end;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 10;
  object-fit: cover;
}

.page-about .about-figcap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--ak-line);
  font-family: var(--ak-font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--ak-mist);
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 10px 0 16px;
  font-size: clamp(28px, 5.4vw, 52px);
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 620px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--ak-mist);
}

.page-about .about-hero__points {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-about .about-hero__points li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  background: var(--ak-panel);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ak-mist);
}

.page-about .about-hero__points .ak-mono {
  flex: none;
  font-size: 15px;
  color: var(--ak-lime);
}

/* 数据条带 */
.page-about .about-strip {
  margin-top: clamp(32px, 5vw, 64px);
  padding: clamp(20px, 3vw, 32px) 0;
  border-top: 1px solid var(--ak-line);
  border-bottom: 1px solid var(--ak-line);
  background: linear-gradient(180deg, rgba(16, 37, 28, 0.85), rgba(10, 15, 12, 0.2));
}

.page-about .about-strip__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-about .about-strip__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  background: var(--ak-night);
  transition: background var(--ak-t-fast) var(--ak-ease);
}

.page-about .about-strip__item:hover {
  background: var(--ak-board);
}

.page-about .about-strip__num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--ak-lime);
  letter-spacing: 0.02em;
}

.page-about .about-strip__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ak-mist);
}

/* 主体：目录轨道 + 章节 */
.page-about .about-body {
  margin-top: clamp(34px, 5.5vw, 72px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-track {
  min-width: 0;
}

.page-about .about-track__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ak-steel);
}

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

.page-about .about-track__item {
  flex: none;
}

.page-about .about-track__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
  color: var(--ak-bone);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--ak-t-fast) var(--ak-ease), background var(--ak-t-fast) var(--ak-ease);
}

.page-about .about-track__link:hover,
.page-about .about-track__link:focus-visible {
  border-color: var(--ak-lime);
  background: var(--ak-board);
}

.page-about .about-track__link .ak-mono {
  font-size: 11px;
  color: var(--ak-lime);
  letter-spacing: 0.08em;
}

.page-about .about-sections {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(24px, 4vw, 42px) 0;
  border-top: 1px solid var(--ak-line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-sec__idx {
  flex: none;
  padding-top: 7px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ak-lime);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1.35;
}

.page-about .about-prose {
  max-width: 680px;
}

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

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

.page-about .about-prose a {
  color: var(--ak-bone);
  text-decoration: none;
  border-bottom: 1px solid var(--ak-lime);
  padding-bottom: 1px;
  transition: color var(--ak-t-fast) var(--ak-ease);
}

.page-about .about-prose a:hover,
.page-about .about-prose a:focus-visible {
  color: var(--ak-lime);
}

.page-about .about-prose--after {
  margin-top: clamp(16px, 2.5vw, 24px);
}

/* 图片 */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  border-top: 1px solid var(--ak-line);
}

/* 五类标签矩阵 */
.page-about .about-tags {
  list-style: none;
  margin: clamp(18px, 2.5vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-about .about-tags > li {
  padding: 15px 14px 16px;
  background: var(--ak-panel);
  border-left: 2px solid transparent;
  transition: background var(--ak-t-fast) var(--ak-ease), border-color var(--ak-t-fast) var(--ak-ease);
}

.page-about .about-tags > li:hover {
  background: var(--ak-board);
  border-left-color: var(--ak-lime);
}

.page-about .about-tag__code {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ak-steel);
}

.page-about .about-tag__name {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ak-bone);
}

.page-about .about-tag__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ak-mist);
}

/* 团队分工 */
.page-about .about-crew {
  list-style: none;
  margin: clamp(18px, 2.5vw, 26px) 0 0;
  padding: 0;
  border-bottom: 1px solid var(--ak-line);
}

.page-about .about-crew__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 3px;
  padding: 14px 0;
  border-top: 1px solid var(--ak-line);
}

.page-about .about-crew__no {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-size: 12px;
  color: var(--ak-lime);
  letter-spacing: 0.1em;
}

.page-about .about-crew__name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ak-bone);
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ak-mist);
}

/* 流程三步 */
.page-about .about-flow {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-flow__step {
  padding: 16px 16px 18px;
  border: 1px solid var(--ak-line);
  border-left: 2px solid var(--ak-lime);
  background: var(--ak-panel);
}

.page-about .about-flow__no {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ak-orange);
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ak-bone);
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ak-mist);
}

/* 跨端阅读对照 */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(18px, 2.5vw, 26px);
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-about .about-split__col {
  padding: clamp(16px, 2.5vw, 24px);
  background: var(--ak-night);
}

.page-about .about-split__col--mobile {
  box-shadow: inset 0 2px 0 var(--ak-lime);
}

.page-about .about-split__col--desktop {
  box-shadow: inset 0 2px 0 var(--ak-steel);
}

.page-about .about-split__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ak-mist);
}

.page-about .about-split__title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ak-bone);
}

.page-about .about-split__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-split__list li {
  position: relative;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ak-mist);
}

.page-about .about-split__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  background: var(--ak-steel);
}

/* 联系与运营 */
.page-about .about-contact {
  margin-top: clamp(20px, 3vw, 28px);
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
}

.page-about .about-contact__list {
  margin: 0;
  padding: 0;
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--ak-line);
}

.page-about .about-contact__key {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ak-steel);
}

.page-about .about-contact__value {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ak-bone);
  word-break: break-word;
}

.page-about .about-contact__value a {
  color: var(--ak-bone);
  text-decoration: none;
  border-bottom: 1px solid var(--ak-line);
  transition: border-color var(--ak-t-fast) var(--ak-ease);
}

.page-about .about-contact__value a:hover,
.page-about .about-contact__value a:focus-visible {
  border-color: var(--ak-lime);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  background: var(--ak-board);
}

/* 响应式 */
@media (min-width: 560px) {
  .page-about .about-strip__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-contact__row {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

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

  .page-about .about-hero__points li {
    flex-direction: column;
    gap: 4px;
    padding: 12px 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-strip__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-track-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-track {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-track__title {
    margin-bottom: 14px;
  }

  .page-about .about-track__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--ak-line);
  }

  .page-about .about-track__item {
    position: relative;
  }

  .page-about .about-track__item::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    width: 7px;
    height: 7px;
    margin-top: -3.5px;
    background: var(--ak-steel);
    transition: background var(--ak-t-fast) var(--ak-ease);
  }

  .page-about .about-track__item:hover::before {
    background: var(--ak-lime);
  }

  .page-about .about-track__link {
    display: block;
    width: 100%;
    padding: 12px 0 12px 18px;
    border: 0;
    background: transparent;
    font-size: 14px;
    white-space: normal;
  }

  .page-about .about-track__link:hover,
  .page-about .about-track__link:focus-visible {
    background: transparent;
    color: var(--ak-lime);
  }
}

@media (min-width: 1180px) {
  .page-about .about-tags {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-strip__item,
  .page-about .about-tags > li,
  .page-about .about-track__link,
  .page-about .about-track__item::before,
  .page-about .about-contact__value a {
    transition: none;
  }
}
<<<END>>>