.page-about {
  position: relative;
  color: var(--moon);
  font-family: var(--sans);
  padding-bottom: clamp(56px, 8vw, 96px);
  background:
    radial-gradient(1200px 620px at 88% -8%, rgba(108, 92, 231, .22), transparent 62%),
    radial-gradient(900px 520px at -12% 22%, rgba(0, 210, 198, .12), transparent 62%),
    linear-gradient(180deg, var(--void), var(--deep) 55%, var(--void));
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ================= 面包屑 ================= */
.page-about .ab-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding-block: 20px 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-about .ys-crumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .ys-crumbs__link:hover {
  color: var(--lilac);
  border-bottom-color: var(--lilac);
}

.page-about .ys-crumbs__sep {
  color: rgba(167, 179, 209, .55);
}

.page-about .ys-crumbs__current {
  color: var(--aurora);
}

.page-about .ab-crumbs__back {
  margin-left: auto;
}

/* ================= 首屏 ================= */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  gap: clamp(32px, 6vw, 56px);
  padding-block: clamp(28px, 5vw, 56px) clamp(48px, 8vw, 96px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: -6% -10% 26% -10%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(680px 380px at 100% 0%, rgba(108, 92, 231, .30), transparent 65%),
    radial-gradient(520px 300px at 8% 100%, rgba(0, 210, 198, .16), transparent 62%),
    linear-gradient(130deg, rgba(7, 13, 28, .75) 0%, rgba(11, 27, 58, .8) 45%, rgba(6, 59, 69, .5) 78%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, 100% 66%, 0 100%);
}

.page-about .ab-hero__copy {
  display: grid;
  gap: clamp(16px, 2.6vw, 22px);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .ab-hero h1 {
  margin: 0;
  font-size: clamp(32px, 6.2vw, 64px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .ab-hero__figures {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 2vw, 22px);
  padding-top: clamp(8px, 2vw, 16px);
}

.page-about .ab-hero__figure {
  display: grid;
  gap: 6px;
}

.page-about .ab-hero__num {
  display: block;
  font-family: var(--mono);
  font-weight: 800;
  font-size: clamp(52px, 9vw, 108px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--moon);
}

.page-about .ab-hero__figure--aurora .ab-hero__num {
  color: var(--aurora);
  text-shadow: 0 0 34px rgba(0, 210, 198, .35);
}

.page-about .ab-hero__cap {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--mist);
}

.page-about .ab-hero__dash {
  align-self: center;
  font-family: var(--mono);
  font-size: clamp(34px, 5.4vw, 64px);
  font-weight: 300;
  color: var(--nebula);
  padding-bottom: 4px;
  line-height: 1;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 6px;
}

.page-about .ab-hero__art {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--line);
  background: radial-gradient(120% 100% at 50% 0%, rgba(108, 92, 231, .22), rgba(7, 13, 28, .9));
  aspect-ratio: 16 / 9;
  box-shadow: var(--shadow);
}

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: 1.08fr .92fr;
    align-items: center;
  }
}

/* ================= 故事主体 ================= */
.page-about .ab-story {
  display: grid;
  gap: clamp(40px, 7vw, 72px);
  padding-top: clamp(24px, 4vw, 48px);
}

.page-about .ab-chapters {
  display: grid;
  gap: 0;
}

/* ================= 章节 ================= */
.page-about .ab-chapter {
  position: relative;
  display: grid;
  gap: clamp(14px, 2.4vw, 24px);
  padding-block: clamp(28px, 5vw, 56px);
  border-top: var(--line);
}

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

.page-about .ab-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--mono);
}

.page-about .ab-chapter__num {
  position: relative;
  padding-left: 12px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--nebula);
  line-height: 1;
}

.page-about .ab-chapter__num::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--nebula), var(--aurora));
}

.page-about .ab-chapter__label {
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--mist);
}

.page-about .ab-chapter__body {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .ab-chapter__body h2 {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--moon);
}

.page-about .ab-chapter__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .ab-chapter__body p a {
  color: var(--aurora);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 210, 198, .45);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .ab-chapter__body p a:hover {
  color: var(--lilac);
  border-bottom-color: var(--lilac);
}

.page-about .ab-note {
  font-size: 14px !important;
  color: var(--mist);
  padding: 14px 16px;
  border-radius: var(--r-sm);
  border: var(--line);
  border-left: 3px solid var(--amber);
  background: linear-gradient(120deg, rgba(255, 196, 107, .07), rgba(22, 35, 74, .35));
}

@media (min-width: 760px) {
  .page-about .ab-chapter {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: clamp(20px, 4vw, 44px);
  }
  .page-about .ab-chapter__head {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
    padding-top: 4px;
  }
}

/* ================= 展签信息牌 ================= */
.page-about .ab-plaques {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .page-about .ab-plaques {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-plaque {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 18px 20px 20px;
  border-radius: var(--r-md);
  border: var(--line);
  border-left: 4px solid var(--nebula);
  background: linear-gradient(160deg, rgba(22, 35, 74, .72), rgba(7, 13, 28, .85));
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .ab-plaque:hover {
  transform: translateY(-2px);
  border-color: rgba(180, 168, 255, .45);
  border-left-color: var(--lilac);
  box-shadow: 0 20px 40px -28px rgba(108, 92, 231, .8);
}

.page-about .ab-plaque__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--aurora);
}

.page-about .ab-plaque__title {
  font-size: 16px !important;
  font-weight: 700;
  color: var(--moon) !important;
  letter-spacing: .02em;
}

.page-about .ab-plaque p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ================= 三层标签 ================= */
.page-about .ab-layers {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

@media (min-width: 780px) {
  .page-about .ab-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-layer {
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border-radius: var(--r-md);
  border: var(--line);
  background:
    linear-gradient(180deg, rgba(6, 59, 69, .55), rgba(11, 27, 58, .7));
  position: relative;
}

.page-about .ab-layer::after {
  content: "";
  position: absolute;
  inset: auto 22px 0 22px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--aurora), transparent);
  opacity: .55;
}

.page-about .ab-layer__tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--amber);
}

.page-about .ab-layer__name {
  font-size: 20px !important;
  font-weight: 700;
  color: var(--paper) !important;
  letter-spacing: .02em;
}

.page-about .ab-layer p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ================= 步骤 ================= */
.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  border: var(--line);
  background: rgba(22, 35, 74, .5);
}

.page-about .ab-steps__num {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--lilac);
  align-self: start;
  padding-top: 2px;
}

.page-about .ab-steps__title {
  margin: 0 0 4px;
  font-size: 15px !important;
  font-weight: 700;
  color: var(--moon) !important;
  letter-spacing: .04em;
}

.page-about .ab-steps__item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ================= 团队名单 ================= */
.page-about .ab-roster {
  display: grid;
  gap: 10px;
}

.page-about .ab-roster__item {
  padding: 16px 20px;
  border-radius: var(--r-md);
  border: var(--line);
  background: linear-gradient(160deg, rgba(22, 35, 74, .65), rgba(7, 13, 28, .85));
  transition: border-color .2s var(--ease);
}

.page-about .ab-roster__item[open] {
  border-color: rgba(180, 168, 255, .42);
}

.page-about .ab-roster__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
}

.page-about .ab-roster__summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-roster__num {
  font-size: 28px;
  font-weight: 700;
  color: var(--aurora);
  letter-spacing: .02em;
  line-height: 1;
}

.page-about .ab-roster__role {
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--moon);
}

.page-about .ab-roster__hint {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
}

.page-about .ab-roster__hint::before {
  content: "+ ";
  color: var(--lilac);
}

.page-about .ab-roster__item[open] .ab-roster__hint::before {
  content: "− ";
  color: var(--aurora);
}

.page-about .ab-roster__body {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ================= 图注图片 ================= */
.page-about .ab-figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: var(--line);
  background: rgba(7, 13, 28, .55);
}

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

.page-about .ab-figure__cap {
  padding: 10px 16px 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  border-top: var(--line);
  background: rgba(11, 27, 58, .6);
}

/* ================= 版本演进 ================= */
.page-about .ab-version-grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

@media (min-width: 900px) {
  .page-about .ab-version-grid {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 6px 0 6px 26px;
  display: grid;
  gap: 24px;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--nebula), var(--aurora));
  opacity: .8;
}

.page-about .ab-timeline__item {
  position: relative;
  transition: transform .2s var(--ease);
}

.page-about .ab-timeline__item:hover {
  transform: translateX(2px);
}

.page-about .ab-timeline__dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--aurora);
  box-shadow: 0 0 0 4px rgba(0, 210, 198, .14);
  transition: box-shadow .2s var(--ease);
}

.page-about .ab-timeline__item:hover .ab-timeline__dot {
  box-shadow: 0 0 0 6px rgba(108, 92, 231, .28), 0 0 14px rgba(0, 210, 198, .6);
}

.page-about .ab-timeline__ver {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--aurora);
}

.page-about .ab-timeline__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
  max-width: 46ch;
}

/* ================= 合作数字 ================= */
.page-about .ab-collab {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .page-about .ab-collab {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .ab-collab__stat {
  display: grid;
  gap: 4px;
  padding: 22px 24px;
  border-radius: var(--r-md);
  border: var(--line);
  background:
    linear-gradient(140deg, rgba(108, 92, 231, .16), rgba(6, 59, 69, .45));
}

.page-about .ab-collab__num {
  font-family: var(--mono);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-about .ab-collab__unit {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

/* ================= 收录维度 ================= */
.page-about .ab-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

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

.page-about .ab-rule {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--r-sm);
  border: var(--line);
  border-top: 2px solid rgba(0, 210, 198, .45);
  background: rgba(11, 27, 58, .62);
  transition: border-top-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .ab-rule:hover {
  border-top-color: var(--aurora);
  transform: translateY(-2px);
}

.page-about .ab-rule__tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--amber);
}

.page-about .ab-rule__name {
  font-size: 17px !important;
  font-weight: 700;
  color: var(--moon) !important;
  letter-spacing: .02em;
}

.page-about .ab-rule p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ================= 侧栏目录 ================= */
.page-about .ab-toc {
  display: none;
}

@media (min-width: 1180px) {
  .page-about .ab-story {
    grid-template-columns: minmax(0, 1fr) 208px;
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .ab-toc {
    display: grid;
    gap: 4px;
    position: sticky;
    top: calc(var(--bar) + 32px);
    align-self: start;
  }
}

.page-about .ab-toc__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--amber);
  padding-bottom: 8px;
  border-bottom: var(--line);
}

.page-about .ab-toc__link {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid rgba(180, 168, 255, .14);
  transition: color .2s var(--ease), border-color .2s var(--ease), padding .2s var(--ease);
}

.page-about .ab-toc__link:hover {
  color: var(--lilac);
  border-left-color: var(--lilac);
}

.page-about .ab-toc__link[aria-current="true"] {
  color: var(--aurora);
  border-left-color: var(--aurora);
  padding-left: 20px;
}

/* ================= 动效降级 ================= */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-plaque,
  .page-about .ab-rule,
  .page-about .ab-timeline__item,
  .page-about .ab-toc__link,
  .page-about .ab-roster__item {
    transition: none;
  }
  .page-about .ab-plaque:hover,
  .page-about .ab-rule:hover,
  .page-about .ab-timeline__item:hover {
    transform: none;
  }
}
<<<END>>>