.page-about {
  --about-gap: clamp(36px, 5vw, 72px);
  --about-line: var(--line);
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 页首 ---------- */
.page-about .about-hero {
  padding: clamp(28px, 5vw, 56px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1100px 380px at 50% -10%, rgba(200, 150, 30, .13), transparent 70%),
    radial-gradient(680px 260px at 88% 8%, rgba(22, 224, 200, .07), transparent 72%),
    var(--ink);
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(38px, 7.4vw, 82px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.06;
  background: linear-gradient(102deg, var(--bone) 8%, var(--gold-lit) 58%, var(--gold) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__foot {
  display: grid;
  gap: 24px;
  align-items: end;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  color: var(--bone);
  font-size: clamp(15px, 1.5vw, 17px);
  opacity: .88;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}

/* ---------- 章节条 ---------- */
.page-about .about-subnav {
  position: relative;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-subnav__inner {
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-subnav__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-subnav__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  white-space: nowrap;
}

.page-about .about-subnav__link {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .04em;
  text-decoration: none;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .about-subnav__link:hover,
.page-about .about-subnav__link:focus-visible {
  color: var(--bone);
  border-color: var(--line);
}

.page-about .about-subnav__link.is-active {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 左右分屏 ---------- */
.page-about .about-split {
  padding: clamp(48px, 7vw, 104px) 0 0;
}

.page-about .about-split__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-split__aside,
.page-about .about-split__main {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  min-width: 0;
}

/* ---------- 品牌主张 ---------- */
.page-about .about-claim__eyebrow,
.page-about .about-timeline__eyebrow,
.page-about .about-rules__eyebrow,
.page-about .about-modes__eyebrow,
.page-about .about-team__eyebrow,
.page-about .about-partners__eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-claim__title,
.page-about .about-timeline__title,
.page-about .about-rules__title,
.page-about .about-modes__title,
.page-about .about-team__title,
.page-about .about-partners__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.24;
  color: var(--bone);
}

.page-about .about-claim__body,
.page-about .about-rules__intro,
.page-about .about-modes__intro,
.page-about .about-team__text,
.page-about .about-partners__intro {
  margin: 0 0 26px;
  max-width: 64ch;
  color: var(--bone);
  opacity: .82;
  font-size: 16px;
}

.page-about .about-claim__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
}

.page-about .about-claim__stats .stat {
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  transition: border-color var(--t) var(--ease);
}

.page-about .about-claim__stats .stat:hover {
  border-color: var(--gold);
}

.page-about .about-claim__stats .stat__label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-claim__stats .stat__value {
  display: block;
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--gold-lit);
}

.page-about .about-claim__stats .stat--cyan .stat__value {
  color: var(--cyan);
}

.page-about .about-claim__stats .stat--red .stat__value {
  color: var(--red);
}

.page-about .about-claim__stats .stat__unit {
  margin-left: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__figure {
  margin: 0 0 26px;
}

.page-about .media {
  margin: 0;
}

.page-about .media__frame {
  display: block;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background:
    linear-gradient(150deg, rgba(200, 150, 30, .12), rgba(22, 224, 200, .05) 55%, transparent),
    var(--panel);
}

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

.page-about .media__cap {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 6px 0 0 26px;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(200, 150, 30, .35) 45%, transparent 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: 14px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 15px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 150, 30, .14);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .about-tl__item:hover::before {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(200, 150, 30, .2);
}

.page-about .about-tl__node {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  transition: border-color var(--t) var(--ease);
}

.page-about .about-tl__node:hover {
  border-color: rgba(200, 150, 30, .5);
}

.page-about .about-tl__node[open] {
  border-color: rgba(200, 150, 30, .6);
}

.page-about .about-tl__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "year stage"
    "year name";
  gap: 2px 12px;
  align-items: center;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-tl__year {
  grid-area: year;
  font-size: 20px;
  font-weight: 800;
  color: var(--gold-lit);
}

.page-about .about-tl__stage {
  grid-area: stage;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-tl__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 600;
  color: var(--bone);
}

.page-about .about-tl__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
  margin-top: 2px;
}

.page-about .about-tl__body p {
  margin: 12px 0 0;
  font-size: 14.5px;
  color: var(--mist);
  line-height: 1.8;
}

/* ---------- 规则公示 ---------- */
.page-about .about-rules {
  position: relative;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(200, 150, 30, .06), transparent 32%),
    var(--panel);
}

.page-about .about-rules__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-about .about-rules__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.page-about .about-rules__filter label {
  padding: 6px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .about-rules__filter label:hover {
  color: var(--bone);
  border-color: rgba(200, 150, 30, .5);
}

.page-about #rf-all:checked ~ .about-rules__filter label[for="rf-all"],
.page-about #rf-trial:checked ~ .about-rules__filter label[for="rf-trial"],
.page-about #rf-formal:checked ~ .about-rules__filter label[for="rf-formal"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-rules__wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.page-about .about-rules__table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-rules__caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-size: 12.5px;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}

.page-about .about-rules__table th,
.page-about .about-rules__table td {
  padding: 13px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-about .about-rules__table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #191c24;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .about-rules__table tbody th {
  font-weight: 600;
  color: var(--bone);
}

.page-about .about-rules__table tbody td {
  color: var(--mist);
}

.page-about .about-rules__table tbody tr {
  transition: background var(--t) var(--ease);
}

.page-about .about-rules__table tbody tr:hover {
  background: rgba(200, 150, 30, .06);
}

.page-about .about-rules__table tbody tr:hover th {
  box-shadow: inset 2px 0 0 var(--gold);
}

.page-about #rf-trial:checked ~ .about-rules__wrap tbody tr[data-scope="formal"] {
  display: none;
}

.page-about #rf-formal:checked ~ .about-rules__wrap tbody tr[data-scope="trial"] {
  display: none;
}

.page-about .about-rules__note {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 模式对照 ---------- */
.page-about .about-modes__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 26px;
}

.page-about .about-mode {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-mode:hover {
  transform: translateY(-2px);
}

.page-about .about-mode--trial:hover {
  border-color: rgba(22, 224, 200, .5);
}

.page-about .about-mode--formal:hover {
  border-color: rgba(200, 150, 30, .5);
}

.page-about .about-mode--trial::before,
.page-about .about-mode--formal::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
}

.page-about .about-mode--trial::before {
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.page-about .about-mode--formal::before {
  background: linear-gradient(180deg, var(--gold), transparent);
}

.page-about .about-mode__title {
  margin: 14px 0 12px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

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

.page-about .about-mode__list li {
  position: relative;
  padding: 7px 0 7px 18px;
  font-size: 14.5px;
  color: var(--mist);
  line-height: 1.7;
  border-bottom: 1px dashed rgba(35, 39, 51, .9);
}

.page-about .about-mode__list li:last-child {
  border-bottom: 0;
}

.page-about .about-mode__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-mode--trial .about-mode__list li::before {
  background: var(--cyan);
}

.page-about .about-modes__figure {
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(56px, 8vw, 120px) 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(720px 320px at 12% 0%, rgba(200, 150, 30, .09), transparent 70%),
    var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-team__roles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-team__roles li {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-team__roles li:hover {
  padding-left: 8px;
  border-color: rgba(200, 150, 30, .45);
}

.page-about .about-team__role-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold-lit);
}

.page-about .about-team__role-desc {
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .about-team__figure {
  margin: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: clamp(56px, 8vw, 116px) 0 clamp(64px, 9vw, 130px);
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-partner {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--ink);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .about-partner:hover {
  border-color: var(--gold);
  background: #10121a;
}

.page-about .about-partner__index {
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
  margin-bottom: 12px;
}

.page-about .about-partner__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .about-partners__cta {
  display: grid;
  gap: 18px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-partners__cta-text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  color: var(--bone);
  opacity: .85;
}

.page-about .about-partners__cta-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-modes__grid,
  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-hero__foot {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-split__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(48px, 6vw, 88px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 1120px) {
  .page-about .about-partners__grid {
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-mode:hover {
    transform: none;
  }
}
</PAGE_CSS>>>