.page-about {
  --about-gap: clamp(16px, 2vw, 28px);
  --about-line: rgba(34, 224, 255, .20);
  --about-divider: rgba(110, 107, 138, .28);
  background: var(--midnight);
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(22px, 4vw, 52px));
  padding-bottom: clamp(36px, 6vw, 78px);
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(90% 70% at 88% 0%, rgba(255, 46, 136, .18), transparent 60%),
    radial-gradient(80% 80% at 0% 100%, rgba(34, 224, 255, .14), transparent 62%),
    var(--midnight);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg,
      rgba(242, 244, 255, .035) 0 1px,
      transparent 1px 4px);
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(18px, 3vw, 34px);
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .hero-copy h1 {
  margin: .22em 0 0;
  max-width: 13em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(33px, 6.4vw, 82px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--mist);
  text-shadow:
    3px 0 0 rgba(255, 46, 136, .5),
    -3px 0 0 rgba(34, 224, 255, .32);
}

.page-about .hero-lede {
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  max-width: 36em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.8;
  color: rgba(242, 244, 255, .84);
}

.page-about .hero-actions {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .hero-status {
  align-self: start;
  padding: 18px 20px 20px;
  border: 2px solid var(--about-line);
  border-left: 6px solid var(--cyan);
  background: linear-gradient(160deg, rgba(42, 27, 74, .86), rgba(20, 26, 58, .92));
  box-shadow: var(--shadow-hard);
}

.page-about .status-list {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .status-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(110, 107, 138, .38);
}

.page-about .status-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .status-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--yellow);
}

.page-about .status-label {
  font-size: 13px;
  color: var(--violet-gray);
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 2.2fr) minmax(220px, 1fr);
    align-items: end;
  }

  .page-about .hero-status {
    margin-bottom: 8px;
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 54px);
  padding-block: clamp(38px, 6vw, 86px);
}

.page-about .about-toc {
  padding-top: 14px;
  border-top: 2px solid var(--line-magenta);
}

.page-about .about-toc ul {
  display: flex;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0 0 6px;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.page-about .about-toc li {
  flex: 0 0 auto;
}

.page-about .about-toc a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--about-divider);
  background: rgba(28, 31, 46, .8);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease-hard), color .2s var(--ease-hard);
}

.page-about .about-toc a .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--violet-gray);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .about-toc a:hover .mono {
  color: var(--magenta);
}

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

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-toc ul {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-toc a {
    display: flex;
    width: 100%;
    padding: 11px 14px;
    border: 0;
    border-left: 2px solid rgba(110, 107, 138, .35);
    background: none;
  }

  .page-about .about-toc a:hover,
  .page-about .about-toc a:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(34, 224, 255, .06);
  }
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding-block: clamp(26px, 4vw, 48px);
  border-top: 1px solid var(--about-divider);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

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

.page-about .chapter__num {
  margin: 0 0 10px;
  font-size: clamp(30px, 4.4vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: rgba(34, 224, 255, .18);
  -webkit-text-stroke: 1.5px rgba(34, 224, 255, .55);
}

.page-about .chapter h2 {
  margin: 0 0 16px;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.3vw, 40px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .chapter p {
  max-width: 38em;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 244, 255, .84);
}

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

/* ---------- 数据条 ---------- */
.page-about .fact-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--about-divider);
  background: var(--about-divider);
}

.page-about .fact {
  padding: 14px 16px;
  background: var(--charcoal);
}

.page-about .fact-num {
  display: block;
  font-size: clamp(20px, 2.3vw, 28px);
  font-weight: 700;
  color: var(--cyan);
}

.page-about .fact:first-child .fact-num {
  color: var(--yellow);
}

.page-about .fact-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet-gray);
}

@media (min-width: 720px) {
  .page-about .fact-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 图框 ---------- */
.page-about .figure-frame {
  position: relative;
  margin: 22px 0 0;
  border: 2px solid var(--about-line);
  background: var(--indigo);
  box-shadow: var(--shadow-hard);
}

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

.page-about .chapter-figure {
  aspect-ratio: 3 / 2;
}

.page-about .chapter-figure img {
  height: 100%;
}

.page-about .rank-figure {
  max-width: 560px;
  aspect-ratio: 1 / 1;
}

.page-about .rank-figure img {
  height: 100%;
}

.page-about .team-figure {
  aspect-ratio: 14 / 9;
}

.page-about .team-figure img {
  height: 100%;
}

.page-about .figure-frame__caption {
  position: absolute;
  right: 0;
  bottom: 0;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--midnight);
  background: var(--cyan);
}

/* ---------- 规则章节网格 ---------- */
.page-about .doc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .doc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--about-divider);
  border-left: 4px solid rgba(34, 224, 255, .34);
  background: var(--charcoal);
  font-size: 14px;
  color: rgba(242, 244, 255, .88);
}

.page-about .doc-item .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--violet-gray);
}

.page-about .doc-item.is-key {
  border-left-color: var(--magenta);
  background: linear-gradient(100deg, rgba(255, 46, 136, .16), rgba(28, 31, 46, .92) 62%);
}

.page-about .doc-item.is-key a {
  color: var(--yellow);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 232, 58, .6);
}

.page-about .doc-item.is-key a:hover,
.page-about .doc-item.is-key a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

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

@media (min-width: 1180px) {
  .page-about .doc-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 段位阶梯 ---------- */
.page-about .rank-ladder {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rank-ladder li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--cyan);
  background: var(--indigo);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .rank-ladder li:nth-child(n+4) {
  border-left-color: rgba(34, 224, 255, .7);
}

.page-about .rank-ladder li:nth-child(n+7) {
  border-left-color: var(--magenta);
}

.page-about .rank-ladder li:last-child {
  border-left-color: var(--yellow);
  background: linear-gradient(100deg, rgba(255, 46, 136, .2), rgba(42, 27, 74, .95) 70%);
}

.page-about .rank-idx {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--violet-gray);
}

.page-about .rank-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--mist);
}

.page-about .rank-req {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--yellow);
}

.page-about .rank-note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--line-magenta);
  font-size: 14px;
  color: rgba(242, 244, 255, .74);
}

@media (min-width: 900px) {
  .page-about .rank-ladder {
    flex-direction: row;
    align-items: flex-end;
    gap: 7px;
    height: 250px;
  }

  .page-about .rank-ladder li {
    flex: 1 1 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
    gap: 8px;
    height: var(--h, 50%);
    padding: 12px 10px;
  }

  .page-about .rank-ladder li:nth-child(1) { --h: 46%; }
  .page-about .rank-ladder li:nth-child(2) { --h: 52%; }
  .page-about .rank-ladder li:nth-child(3) { --h: 58%; }
  .page-about .rank-ladder li:nth-child(4) { --h: 64%; }
  .page-about .rank-ladder li:nth-child(5) { --h: 70%; }
  .page-about .rank-ladder li:nth-child(6) { --h: 76%; }
  .page-about .rank-ladder li:nth-child(7) { --h: 84%; }
  .page-about .rank-ladder li:nth-child(8) { --h: 92%; }
  .page-about .rank-ladder li:nth-child(9) { --h: 100%; }

  .page-about .rank-name {
    font-size: 16px;
    writing-mode: vertical-rl;
    letter-spacing: .1em;
  }

  .page-about .rank-req {
    margin-left: 0;
    font-size: 11px;
  }

  .page-about .rank-idx {
    font-size: 10px;
  }
}

/* ---------- 折叠问答 ---------- */
.page-about .qa {
  margin-top: 14px;
  border: 1px solid var(--about-divider);
  background: var(--charcoal);
}

.page-about .qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  font-weight: 700;
  font-size: 15px;
  color: var(--mist);
  list-style: none;
}

.page-about .qa summary::-webkit-details-marker {
  display: none;
}

.page-about .qa summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-about .qa[open] summary::after {
  content: "–";
  color: var(--magenta);
}

.page-about .qa[open] summary {
  border-bottom: 1px solid var(--about-divider);
}

.page-about .qa p {
  max-width: 38em;
  margin: 0;
  padding: 14px 16px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 244, 255, .8);
}

/* ---------- 历程横向轨道 ---------- */
.page-about .timeline-track {
  display: flex;
  gap: 14px;
  margin: 24px 0 0;
  padding: 4px 4px 18px;
  overflow-x: auto;
  list-style: none;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline-node {
  position: relative;
  flex: 0 0 min(80vw, 320px);
  padding: 20px 18px 18px;
  border: 2px solid rgba(110, 107, 138, .38);
  background: linear-gradient(170deg, rgba(28, 31, 46, .96), rgba(10, 10, 18, .96));
  scroll-snap-align: start;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 56px;
  height: 4px;
  background: var(--cyan);
}

.page-about .timeline-node.is-major {
  border-color: var(--line-magenta);
  box-shadow: 6px 6px 0 0 rgba(255, 46, 136, .18);
}

.page-about .timeline-node.is-major::before {
  background: var(--magenta);
  width: 88px;
}

.page-about .timeline-node .node-tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .timeline-node.is-major .node-tag {
  color: var(--magenta);
}

.page-about .timeline-node h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.24;
  color: var(--mist);
}

.page-about .timeline-node p {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 244, 255, .74);
}

/* ---------- 收束条 ---------- */
.page-about .about-quick {
  padding-block: clamp(34px, 5vw, 64px);
  border-top: 1px solid var(--about-line);
  background:
    linear-gradient(120deg, rgba(42, 27, 74, .75), rgba(10, 10, 18, .9) 60%),
    var(--midnight);
}

.page-about .quick-shell {
  display: grid;
  gap: 18px;
}

.page-about .quick-lead {
  margin: 0;
  max-width: 32em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.3;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .quick-shell {
    grid-template-columns: minmax(0, 1.2fr) auto;
    align-items: center;
  }
}
<<<END>>>