.page-about {
  --about-line: rgba(244, 239, 230, .16);
  --about-dash: rgba(244, 239, 230, .32);
  --about-panel: rgba(11, 18, 51, .55);
  --about-body: rgba(244, 239, 230, .84);
  --about-body-soft: rgba(244, 239, 230, .74);
  --about-end: #2C2044;
  position: relative;
  overflow-x: clip;
  padding-bottom: var(--s6);
  color: var(--paper-ivory);
  font-family: var(--font-body);
  background:
    linear-gradient(180deg, var(--night-indigo) 0%, var(--dusk-indigo) 46%, var(--about-end) 82%, #3A2440 100%);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--focus-blue);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: var(--s4) 0 var(--s5);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dusk-orange);
  margin: 0 0 var(--s2);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 8.6vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0;
  max-width: 15ch;
  color: var(--paper-ivory);
}

.page-about .about-hero__lede {
  margin: var(--s3) 0 0;
  max-width: 34rem;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--about-body);
}

.page-about .about-hero__stamp {
  margin-top: var(--s3);
  padding-left: var(--s2);
  border-left: 2px solid var(--dusk-orange);
}

.page-about .about-stamp__k {
  margin: 0 0 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-gray);
}

.page-about .about-stamp__v {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  color: var(--data-cyan);
}

.page-about .about-stamp__v span:last-child {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--mist-gray);
  margin-left: 6px;
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  margin-top: var(--s4);
}

.page-about .about-toc__title {
  margin: 0 0 var(--s1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist-gray);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: var(--s2);
  min-height: 44px;
  padding: 11px 0;
  border-bottom: 1px solid var(--about-line);
  color: var(--paper-ivory);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color .22s var(--ease), padding-left .22s var(--ease);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--dusk-orange);
  flex: 0 0 auto;
}

.page-about .about-toc__link:hover {
  color: var(--data-cyan);
  padding-left: 6px;
}

.page-about .about-toc__link[aria-current="true"] {
  color: var(--data-cyan);
  border-bottom-color: var(--data-cyan);
}

.page-about .about-toc__link[aria-current="true"] .about-toc__idx {
  color: var(--data-cyan);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: var(--s5) 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-chapter--last {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s2);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: center;
  gap: var(--s1);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--dusk-orange);
  border-top: 1px solid currentColor;
  padding-top: 5px;
}

.page-about .about-rail__note {
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--mist-gray);
}

.page-about .about-chapter__body {
  max-width: 36rem;
}

.page-about .about-chapter__body--wide {
  max-width: 52rem;
}

.page-about .about-chapter__title {
  margin: 0 0 var(--s2);
  font-family: var(--font-display);
  font-size: clamp(24px, 5.6vw, 40px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper-ivory);
}

.page-about .about-text p {
  margin: 0 0 var(--s2);
  max-width: 34rem;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--about-body);
}

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

.page-about .about-text--after {
  margin-top: var(--s3);
}

/* ---------- 图片 ---------- */
.page-about .about-shot {
  margin: var(--s3) 0 0;
  background: var(--dusk-indigo);
  border: 1px solid var(--ink-black);
  box-shadow: var(--shadow-paper);
}

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

.page-about .about-shot figcaption {
  padding: 10px var(--s2);
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--mist-gray);
}

.page-about .about-shot--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s2);
  margin-top: var(--s3);
}

.page-about .about-crew__item {
  background: var(--paper-ivory);
  color: var(--ink-black);
  border: 1px solid var(--ink-black);
  box-shadow: var(--shadow-paper);
  padding: var(--s2);
}

.page-about .about-crew__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ember-orange);
}

.page-about .about-crew__name {
  margin: 6px 0 8px;
  font-size: 19px;
  line-height: 1.3;
  font-weight: 800;
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.66;
  color: rgba(7, 10, 20, .78);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  counter-reset: flow;
  margin: var(--s3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--s3);
}

.page-about .about-flow > li {
  position: relative;
  padding-left: 40px;
}

.page-about .about-flow > li::before {
  counter-increment: flow;
  content: "0" counter(flow);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--dusk-orange);
}

.page-about .about-flow__h {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--paper-ivory);
}

.page-about .about-flow__p {
  margin: 0;
  max-width: 32rem;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-body-soft);
}

/* ---------- 数字条 ---------- */
.page-about .about-tally {
  margin-top: var(--s3);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-tally__cell {
  background: var(--about-panel);
  padding: var(--s2);
}

.page-about .about-tally__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 6.4vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--data-cyan);
}

.page-about .about-tally__label {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--about-body-soft);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: var(--s3) 0 0;
  padding: 0 0 0 var(--s3);
  border-left: 1px dashed var(--about-dash);
  display: grid;
  gap: var(--s3);
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--s3) - 5px);
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--dusk-orange);
  border: 1px solid var(--ink-black);
}

.page-about .about-timeline > li:nth-child(2)::before {
  background: var(--data-cyan);
}

.page-about .about-timeline > li:nth-child(3)::before {
  background: var(--amber-gold);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--dusk-orange);
}

.page-about .about-timeline__h {
  margin: 6px 0 8px;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--paper-ivory);
}

.page-about .about-timeline__p {
  margin: 0;
  max-width: 32rem;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-body-soft);
}

.page-about [data-reveal] {
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: border-color .28s var(--ease), padding-left .28s var(--ease);
}

.page-about [data-reveal][data-in="true"] {
  border-left-color: var(--dusk-orange);
  padding-left: var(--s2);
}

/* ---------- 合作与反馈 ---------- */
.page-about .about-grid2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s3);
  margin-top: var(--s2);
}

.page-about .about-block__h {
  margin: 0 0 var(--s1);
  font-size: 17px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--paper-ivory);
  border-bottom: 1px solid var(--about-line);
  padding-bottom: 8px;
}

.page-about .about-block__p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-body-soft);
}

.page-about .about-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: var(--s3) 0 0;
  padding: 0;
}

.page-about .about-tags__item {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  padding: 6px 10px;
  border: 1px solid var(--about-line);
  color: var(--about-body-soft);
  background: rgba(26, 35, 80, .5);
}

/* ---------- 联系 ---------- */
.page-about .about-cta {
  margin-top: var(--s2);
  padding: var(--s3);
  background: var(--paper-ivory);
  color: var(--ink-black);
  border: 1px solid var(--ink-black);
  box-shadow: var(--shadow-paper);
}

.page-about .about-cta__h {
  margin: 0 0 var(--s2);
  font-family: var(--font-display);
  font-size: clamp(22px, 4.8vw, 30px);
  line-height: 1.2;
  font-weight: 800;
}

.page-about .about-cta__p {
  margin: 0 0 var(--s3);
  font-size: 15px;
  line-height: 1.72;
  color: rgba(7, 10, 20, .8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
}

.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--ink-black);
  background: var(--ink-black);
  color: var(--paper-ivory);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-btn--ghost {
  background: transparent;
  color: var(--ink-black);
}

.page-about .about-btn:hover {
  background: var(--dusk-orange);
  border-color: var(--dusk-orange);
  color: var(--ink-black);
}

.page-about .about-btn--ghost:hover {
  background: var(--ink-black);
  border-color: var(--ink-black);
  color: var(--paper-ivory);
}

.page-about .about-contact {
  margin: var(--s3) 0 0;
  padding-top: var(--s2);
  border-top: 1px dashed rgba(7, 10, 20, .3);
  display: grid;
  gap: 10px;
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.page-about .about-contact dt {
  font-size: 12px;
  color: rgba(7, 10, 20, .58);
}

.page-about .about-contact dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-black);
  word-break: break-word;
}

.page-about .about-contact dd.mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-tail {
  margin: var(--s3) 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-body-soft);
}

.page-about .about-tail__link {
  color: var(--data-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 196, .45);
}

.page-about .about-tail__link:hover {
  border-bottom-color: var(--data-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: var(--s5);
  }

  .page-about .about-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--s3);
  }

  .page-about .about-crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s3) var(--s2);
  }

  .page-about .about-crew__item:nth-child(even) {
    margin-top: var(--s2);
  }

  .page-about .about-tally {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-grid2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s3);
  }

  .page-about .about-cta {
    padding: var(--s4);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: var(--s4);
    align-items: start;
  }

  .page-about .about-hero__stamp {
    margin-top: 8px;
    padding-left: var(--s2);
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: var(--s4);
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 6px;
  }

  .page-about .about-rail__note {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .2em;
    margin-top: var(--s1);
  }

  .page-about .about-chapter__body {
    max-width: 34rem;
  }

  .page-about .about-chapter__body--wide {
    max-width: 56rem;
  }

  .page-about .about-chapter__title {
    max-width: 20ch;
  }

  .page-about .about-shot {
    margin-top: var(--s4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-btn,
  .page-about [data-reveal] {
    transition: none;
  }
}
<<<END>>>