.page-about {
  --about-rail-w: 216px;
  color: var(--text);
}

.page-about .about-crumb-wrap {
  padding-top: clamp(14px, 2vw, 22px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--gold);
}

.page-about .eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(36px, 6vw, 68px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(760px, 82vw);
  height: 440px;
  background: radial-gradient(closest-side, rgba(232, 163, 61, 0.22), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-hero-year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(76px, 15vw, 148px);
  line-height: 0.8;
  font-weight: 700;
  letter-spacing: -0.06em;
  color: var(--gold);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-hero-year {
    background: linear-gradient(100deg, var(--gold) 10%, var(--gold-deep) 66%, var(--line) 128%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.6vw, 46px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.page-about .about-hero .lead {
  max-width: 58ch;
  margin: 0 0 26px;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-facts li {
  padding-top: 10px;
  border-top: 2px solid var(--line);
}

.page-about .about-hero-facts li:nth-child(1) {
  border-top-color: var(--gold);
}

.page-about .about-hero-facts li:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .about-fact-num {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-fact-num em {
  margin-left: 2px;
  font-size: 0.6em;
  font-style: normal;
  color: var(--gold);
}

.page-about .about-fact-label {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero-visual {
  position: relative;
  margin: 0;
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-about .about-hero-visual figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 主体分栏 */
.page-about .about-body {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-rail {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-rail-list a .mono {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan-dim);
}

.page-about .about-rail-list a:hover {
  color: var(--text);
  border-color: var(--cyan-dim);
}

.page-about .about-rail-list a[aria-current] {
  color: var(--text);
  border-color: var(--cyan);
}

.page-about .about-rail-list a[aria-current] .mono {
  color: var(--cyan);
}

.page-about .about-year-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-year-list a {
  display: inline-block;
  padding: 4px 9px;
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-year-list a:hover,
.page-about .about-year-list a[aria-current] {
  border-color: var(--gold);
  color: var(--gold);
}

/* 章节 */
.page-about .about-section {
  padding: clamp(30px, 5vw, 52px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-about .about-main > .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section .section-title {
  margin: 8px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.page-about .about-lead {
  max-width: 64ch;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-prose p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--muted);
}

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

.page-about .about-prose-last {
  max-width: 64ch;
  margin: 22px 0 0;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--muted);
}

.page-about .about-main a:not(.btn) {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

.page-about .about-main a:not(.btn):hover {
  border-bottom-color: var(--cyan);
}

.page-about .about-note {
  margin-top: 22px;
  padding: 14px 16px 14px 18px;
  border-left: 3px solid var(--gold);
  background: linear-gradient(90deg, rgba(232, 163, 61, 0.1), transparent 82%);
}

.page-about .about-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-note .about-note-label {
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

/* 规则资料 */
.page-about .about-section--panel {
  padding: clamp(24px, 4vw, 44px);
  background: var(--panel-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-section--panel + .about-section {
  border-top: 0;
}

.page-about .about-cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-cat-grid li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 8px 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--text);
}

.page-about .about-cat-grid .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

/* 更新节奏 */
.page-about .about-cadence {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence li {
  position: relative;
  margin-left: 6px;
  padding: 4px 0 24px 28px;
  border-left: 1px solid var(--line);
}

.page-about .about-cadence li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-cadence li::before {
  content: "";
  position: absolute;
  top: 12px;
  left: -5px;
  width: 9px;
  height: 9px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(232, 163, 61, 0.12);
}

.page-about .about-cadence-freq {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-cadence h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-cadence p:not(.about-cadence-freq) {
  max-width: 60ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-footnote {
  max-width: 62ch;
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* 团队分工 */
.page-about .about-section--panel-2 {
  background: linear-gradient(180deg, rgba(53, 224, 208, 0.07), transparent 52%);
}

.page-about .about-tabs {
  margin: 22px 0 0;
}

.page-about .about-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-tabs .tab {
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
}

.page-about .about-tabs .tab:hover {
  color: var(--text);
  border-color: var(--cyan-dim);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-tabs .tab-panel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--panel-2);
}

.page-about .about-tabs .tab-panel + .tab-panel {
  margin-top: 10px;
}

.page-about .about-tabs .tab-panel h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-tabs .tab-panel p {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-team-figure {
  margin: 26px 0 0;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-team-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 合作生态 */
.page-about .about-fold-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
}

.page-about .about-fold-list .rule-fold {
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-fold-list .rule-fold-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.page-about .about-fold-list .rule-fold-head::-webkit-details-marker {
  display: none;
}

.page-about .about-fold-list .rule-fold-head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-fold-list .rule-fold[open] .rule-fold-head::after {
  content: "−";
}

.page-about .about-fold-list .rule-fold-body {
  padding: 0 16px 16px;
}

.page-about .about-fold-list .rule-fold-body p {
  max-width: 62ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-honor {
  margin-top: 26px;
  padding: 18px 20px;
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, rgba(232, 163, 61, 0.09), transparent 72%);
}

.page-about .about-honor > .mono {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

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

.page-about .about-honor li {
  display: flex;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-honor li .mono {
  flex: none;
  padding-top: 2px;
  font-size: 12px;
  color: var(--muted);
}

/* 发展轨迹 */
.page-about .about-timeline-figure {
  margin: 0 0 28px;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1.1;
  object-fit: cover;
  border: 1px solid var(--line);
  opacity: 0.82;
}

.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline li {
  position: relative;
  margin-left: 8px;
  padding: 0 0 30px 30px;
  border-left: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-about .about-timeline li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  top: 6px;
  left: -6px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-timeline-year {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-timeline h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-timeline p:not(.about-timeline-year) {
  max-width: 62ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--muted);
}

/* 结尾 */
.page-about .about-cta {
  padding: 0 0 clamp(48px, 8vw, 96px);
}

.page-about .about-cta-inner {
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(232, 163, 61, 0.16), rgba(11, 13, 16, 0.92) 46%, rgba(53, 224, 208, 0.1));
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-about .about-cta-inner .eyebrow {
  color: var(--gold);
}

.page-about .about-cta h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: -0.02em;
}

.page-about .about-cta p {
  max-width: 56ch;
  margin: 0 0 22px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    padding-top: 0;
    border-top: 0;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail-list a {
    padding: 7px 0 7px 12px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-about .about-rail-list a:hover,
  .page-about .about-rail-list a[aria-current] {
    border-left-color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-list a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>