.page-about {
  background: var(--cream);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumbs {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 14px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: rgba(18, 20, 23, 0.55);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(18, 20, 23, 0.32);
}

.page-about .about-crumbs a {
  color: var(--table);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  border-bottom-color: var(--gold);
}

.page-about .about-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--wine);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  position: relative;
  margin-top: 14px;
  padding: clamp(30px, 6vw, 72px) 0 clamp(36px, 6vw, 76px);
  background:
    radial-gradient(120% 130% at 88% 0%, rgba(63, 224, 197, 0.14) 0%, transparent 58%),
    radial-gradient(90% 90% at 0% 100%, rgba(198, 40, 57, 0.22) 0%, transparent 60%),
    var(--table-deep);
  color: var(--ivory);
  border-bottom: 1px solid rgba(212, 166, 74, 0.34);
  overflow: hidden;
}

.page-about .about-lead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(255, 249, 239, 0.045) 0 2px,
    transparent 2px 9px
  );
  pointer-events: none;
}

.page-about .about-lead-grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .about-lead-note {
  border-left: 2px solid var(--gold);
  padding-left: 16px;
}

.page-about .about-lead-note .about-eyebrow {
  color: var(--cyan);
}

.page-about .about-note-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--sage);
  max-width: 30ch;
}

.page-about .about-note-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-note-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--sage);
}

.page-about .about-note-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .about-lead-main h1 {
  margin: 0;
  font-weight: 900;
  font-size: clamp(29px, 5.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ivory);
  text-wrap: balance;
}

.page-about .about-deck {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(255, 249, 239, 0.9);
}

.page-about .about-deck--sub {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(201, 214, 200, 0.22);
  font-size: 15px;
  color: var(--sage);
}

.page-about .about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cta-row .btn {
  text-decoration: none;
}

/* ---------- 目录 ---------- */
.page-about .about-toc {
  background: var(--ink);
  border-bottom: 1px solid rgba(212, 166, 74, 0.28);
}

.page-about .about-toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc-link {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid rgba(201, 214, 200, 0.24);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--sage);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-toc-link:hover,
.page-about .about-toc-link:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: clamp(40px, 7vw, 88px) 0;
}

.page-about .about-sec--table {
  background: var(--table);
  color: var(--ivory);
}

.page-about .about-sec--dark {
  background: var(--table-deep);
  color: var(--ivory);
}

.page-about .about-sec--wine {
  background: var(--wine);
  color: var(--ivory);
}

.page-about .about-sec--cream {
  background: var(--cream);
  color: var(--ink);
  border-top: 1px solid rgba(18, 20, 23, 0.09);
}

.page-about .about-row {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
}

.page-about .about-rail {
  border-left: 1px solid rgba(18, 20, 23, 0.16);
  padding-left: 14px;
}

.page-about .about-sec--table .about-rail,
.page-about .about-sec--dark .about-rail,
.page-about .about-sec--wine .about-rail {
  border-left-color: rgba(212, 166, 74, 0.42);
}

.page-about .about-rail-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(18, 20, 23, 0.62);
  max-width: 26ch;
}

.page-about .about-sec--table .about-rail-note,
.page-about .about-sec--dark .about-rail-note,
.page-about .about-sec--wine .about-rail-note {
  color: var(--sage);
}

.page-about .about-body h2,
.page-about .about-next-copy h2 {
  margin: 0 0 18px;
  font-size: clamp(23px, 3.4vw, 37px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.page-about .about-body p {
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
}

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

.page-about .about-body a,
.page-about .about-rule a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.page-about .about-sec--cream .about-body a,
.page-about .about-sec--cream .about-rule a {
  color: var(--wine);
}

.page-about .about-inline-link {
  margin-top: 24px !important;
  padding-top: 16px;
  border-top: 1px solid rgba(18, 20, 23, 0.14);
  font-size: 15px;
  color: rgba(18, 20, 23, 0.76);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
  border: 1px solid rgba(212, 166, 74, 0.34);
  border-radius: var(--r);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  background: var(--ink);
}

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

.page-about .about-figure .figure-cap {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--sage);
  background: rgba(7, 42, 32, 0.92);
  border-top: 1px solid rgba(212, 166, 74, 0.24);
}

.page-about .about-figure--event {
  max-width: 560px;
}

/* ---------- 数字卡 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-stat {
  padding: 16px 14px;
  border: 1px solid rgba(18, 20, 23, 0.14);
  border-radius: var(--r);
  background: var(--ivory);
  box-shadow: var(--shadow-card);
  cursor: default;
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold);
  outline: none;
}

.page-about .about-stat:focus-visible {
  box-shadow: 0 0 0 3px rgba(63, 224, 197, 0.62);
}

.page-about .about-stat-num {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--chip);
}

.page-about .about-stat-label {
  margin: 6px 0 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--table);
}

.page-about .about-stat-note {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(18, 20, 23, 0.68);
  transition: max-height 220ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}

.page-about .about-stat:hover .about-stat-note,
.page-about .about-stat:focus .about-stat-note,
.page-about .about-stat:focus-within .about-stat-note {
  max-height: 6em;
  opacity: 1;
  margin-top: 9px;
}

/* ---------- 团队 tabs ---------- */
.page-about .about-row--head {
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .about-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(201, 214, 200, 0.22);
}

.page-about .about-tab {
  padding: 9px 16px;
  border: 1px solid rgba(201, 214, 200, 0.28);
  border-radius: 999px;
  background: transparent;
  color: var(--sage);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .about-tab:hover {
  transform: translateY(-1px);
  border-color: var(--cyan);
  color: var(--ivory);
}

.page-about .about-tab:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(63, 224, 197, 0.7);
}

.page-about .about-tab[aria-selected="true"] {
  background: var(--chip);
  border-color: var(--chip);
  color: var(--ivory);
  box-shadow: inset 0 0 0 2px rgba(255, 249, 239, 0.16);
}

.page-about .about-tabpanel {
  padding: 22px 0 0;
  max-width: 62ch;
}

.page-about .about-tabpanel h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-tabpanel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(255, 249, 239, 0.88);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 6px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    rgba(212, 166, 74, 0.7) 0%,
    rgba(198, 40, 57, 0.6) 55%,
    rgba(11, 61, 46, 0.28) 100%
  );
}

.page-about .about-tl-item {
  position: relative;
  padding-left: 58px;
  padding-bottom: 30px;
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-marker {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ivory);
  color: var(--wine);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  box-shadow: var(--shadow-card);
}

.page-about .about-tl-item--current .about-tl-marker {
  background: var(--chip);
  border-color: var(--chip);
  color: var(--ivory);
  box-shadow: var(--shadow-chip);
}

.page-about .about-tl-content h3 {
  margin: 2px 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--table);
}

.page-about .about-tl-item--current .about-tl-content h3 {
  color: var(--chip);
}

.page-about .about-tl-content p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(18, 20, 23, 0.78);
  max-width: 60ch;
}

/* ---------- 赛事与荣誉 ---------- */
.page-about .about-award {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-top: 26px;
  padding: 16px 18px;
  border: 1px solid rgba(212, 166, 74, 0.48);
  border-radius: var(--r);
  background: rgba(18, 20, 23, 0.28);
}

.page-about .about-award-year {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-about .about-award-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 249, 239, 0.9);
}

/* ---------- 公约 ---------- */
.page-about .about-rules {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-rule {
  padding: 18px 16px;
  border: 1px solid rgba(18, 20, 23, 0.14);
  border-left: 3px solid var(--table);
  border-radius: var(--r);
  background: var(--ivory);
  box-shadow: var(--shadow-card);
}

.page-about .about-rule:nth-child(2) {
  border-left-color: var(--chip);
}

.page-about .about-rule:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .about-rule:nth-child(4) {
  border-left-color: var(--cyan);
}

.page-about .about-rule-no {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(18, 20, 23, 0.42);
}

.page-about .about-rule h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--table);
  letter-spacing: -0.01em;
}

.page-about .about-rule p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(18, 20, 23, 0.76);
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  padding: clamp(36px, 6vw, 72px) 0;
  background:
    linear-gradient(100deg, rgba(198, 40, 57, 0.1) 0%, transparent 46%),
    var(--ink);
  color: var(--ivory);
  border-top: 1px solid rgba(212, 166, 74, 0.32);
}

.page-about .about-next-grid {
  display: grid;
  gap: 24px;
}

.page-about .about-next-copy .about-eyebrow {
  color: var(--cyan);
}

.page-about .about-next-copy h2 {
  margin-top: 10px;
  color: var(--ivory);
}

.page-about .about-next-copy p {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-about .about-next-links .btn {
  text-decoration: none;
}

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

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

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-next-links {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-lead-grid {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-row {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 88px;
  }

  .page-about .about-tl-item {
    padding-left: 66px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-row {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-figure--event {
    margin-left: 0;
  }
}

@media (hover: none) {
  .page-about .about-stat-note {
    max-height: none;
    opacity: 1;
    margin-top: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-toc-link,
  .page-about .about-tab,
  .page-about .about-stat-note {
    transition: none;
  }

  .page-about .about-stat:hover,
  .page-about .about-stat:focus-visible,
  .page-about .about-tab:hover {
    transform: none;
  }
}
<<<END>>>