.page-about {
  --about-cut: 20px;
  --about-gap: clamp(16px, 2.4vw, 28px);
  --about-ink-line: 1px solid var(--c-line);
}

.page-about [hidden] {
  display: none !important;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  color: var(--c-paper);
  margin: 0;
}

.page-about h1 {
  font-size: clamp(1.85rem, 4.8vw, 3.3rem);
  line-height: 1.18;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about h2 {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  line-height: 1.26;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about h3 {
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
  line-height: 1.4;
  font-weight: 600;
}

.page-about p {
  margin: 0;
  color: var(--c-body);
  line-height: 1.85;
}

.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about [tabindex="0"]:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-about .about-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan-soft);
  white-space: nowrap;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding-block: clamp(14px, 3vw, 26px) clamp(28px, 5vw, 52px);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 60%;
  background: radial-gradient(120% 80% at 78% 0%, rgba(57, 245, 209, 0.12), transparent 62%);
  pointer-events: none;
}

.page-about .about-cover__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-lead {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 54ch;
  font-size: clamp(0.98rem, 1.5vw, 1.06rem);
  color: var(--c-body);
}

.page-about .about-cover__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-cover__aside {
  position: relative;
  min-width: 0;
}

.page-about .about-cover__figure {
  margin: 0;
  overflow: hidden;
  border: var(--about-ink-line);
  background: var(--c-navy);
}

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

.page-about .about-badge {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: 12px;
  width: fit-content;
  max-width: 100%;
  margin: -36px 0 0 clamp(8px, 3vw, 28px);
  padding: 14px 18px 16px;
  background: var(--c-ink);
  border: 1px solid var(--c-cyan);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .about-badge__num {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.6rem, 7vw, 4rem);
  line-height: 0.85;
  color: var(--c-cyan);
}

.page-about .about-badge__label {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.65;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 14px 0 0;
  border-top: var(--about-ink-line);
}

.page-about .about-index a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--c-mist);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  border-block: var(--about-ink-line);
  background: linear-gradient(90deg, var(--c-navy), var(--c-ink) 70%);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 3vw, 26px) clamp(12px, 2vw, 20px);
  background: var(--c-ink);
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

/* ---------- 起点 ---------- */
.page-about .about-origin,
.page-about .about-flow,
.page-about .about-venue,
.page-about .about-partners,
.page-about .about-roles {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-about .about-origin {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-note {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .about-origin__body {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(10px, 2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 14px 16px 16px 22px;
  border-left: 1px solid var(--c-line);
  background: linear-gradient(90deg, rgba(57, 245, 209, 0.07), transparent 68%);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 21px;
  width: 8px;
  height: 8px;
  background: var(--c-cyan);
  transform: rotate(45deg);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  border-left-color: var(--c-cyan);
  background: linear-gradient(90deg, rgba(57, 245, 209, 0.16), transparent 74%);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.09em;
  color: var(--c-cyan-soft);
}

.page-about .about-timeline__item h3 {
  margin: 7px 0 6px;
}

.page-about .about-timeline__item p {
  font-size: 0.95rem;
  color: var(--c-mist);
}

/* ---------- 四类角色 ---------- */
.page-about .about-roles {
  padding-block: clamp(44px, 7vw, 88px);
  background: var(--c-navy);
  border-block: var(--about-ink-line);
}

.page-about .about-roles__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: clamp(6px, 2vw, 16px) 0 clamp(18px, 3vw, 28px);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-roles__status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

.page-about .about-role-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-role {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--c-tunnel);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

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

.page-about .about-role__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role__index {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 200;
  line-height: 1;
  color: var(--c-cyan);
  opacity: 0.7;
}

.page-about .about-role p {
  font-size: 0.95rem;
}

.page-about .about-role__value {
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-cyan-soft) !important;
}

.page-about .about-role__value span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-flow__media {
  margin: 0;
  overflow: hidden;
  border: var(--about-ink-line);
  background: var(--c-navy);
}

.page-about .about-flow__body {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .about-flow__intro {
  font-size: 0.97rem;
  color: var(--c-mist);
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(8px, 2vw, 16px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: var(--about-ink-line);
}

.page-about .about-step:last-child {
  border-bottom: var(--about-ink-line);
}

.page-about .about-steps__num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 200;
  line-height: 1.1;
  color: var(--c-home);
}

.page-about .about-step h3 {
  margin-bottom: 6px;
}

.page-about .about-step p {
  font-size: 0.94rem;
  color: var(--c-mist);
}

/* ---------- 场馆 ---------- */
.page-about .about-venue {
  padding-block: clamp(44px, 7vw, 88px);
  background: linear-gradient(180deg, var(--c-ink), var(--c-navy));
  border-top: var(--about-ink-line);
}

.page-about .about-venue__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-venue__body {
  display: grid;
  gap: 18px;
  min-width: 0;
}

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

.page-about .about-venue__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--c-body);
}

.page-about .about-venue__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 2px;
  background: var(--c-cyan);
}

.page-about .about-venue__tags {
  display: grid;
  gap: 10px;
  padding: clamp(14px, 2.4vw, 20px);
  background: var(--c-tunnel);
  border-left: 3px solid var(--c-cyan);
}

.page-about .about-venue__tags p {
  font-size: 0.92rem;
  color: var(--c-mist);
}

.page-about .about-venue__figure {
  margin: 0;
  overflow: hidden;
  border: var(--about-ink-line);
  background: var(--c-navy);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-partner {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 24px) 0 0;
  border-top: 2px solid var(--c-line);
  transition: border-color 0.3s var(--ease);
}

.page-about .about-partner:hover {
  border-top-color: var(--c-cyan);
}

.page-about .about-partner__num {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .about-partner h3 {
  font-size: 1rem;
  color: var(--c-paper);
}

.page-about .about-partner p {
  font-size: 0.93rem;
  color: var(--c-mist);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  padding-block: clamp(40px, 6vw, 72px);
  background: var(--c-navy);
  border-top: var(--about-ink-line);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-cta__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "idx title"
    "idx desc";
  column-gap: 14px;
  padding: 16px 18px;
  text-decoration: none;
  background: var(--c-ink);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  border-color: var(--c-cyan);
  background: var(--c-tunnel);
}

.page-about .about-cta__index {
  grid-area: idx;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-cyan);
}

.page-about .about-cta__title {
  grid-area: title;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-paper);
}

.page-about .about-cta__desc {
  grid-area: desc;
  margin-top: 4px;
  font-size: 0.87rem;
  line-height: 1.65;
  color: var(--c-mist);
}

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

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

@media (min-width: 820px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 24px;
  }

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

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

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

  .page-about .about-venue__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-timeline__item:nth-child(1) {
    margin-left: 0;
  }

  .page-about .about-timeline__item:nth-child(2) {
    margin-left: 20px;
  }

  .page-about .about-timeline__item:nth-child(3) {
    margin-left: 40px;
  }

  .page-about .about-timeline__item:nth-child(4) {
    margin-left: 60px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>