.page-about {
  background: var(--ink-800);
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

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

.page-about a {
  color: inherit;
}

.page-about .breadcrumb {
  margin-bottom: clamp(16px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fog);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(8px, 2vw, 20px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: end;
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7.4vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--paper-white);
}

.page-about .about-intro {
  margin: 18px 0 0;
  max-width: 52ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__meta li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--fog);
}

.page-about .about-brief {
  background: var(--paper);
  color: var(--ink-800);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: 0 24px 60px -32px rgba(5, 11, 16, 0.9);
}

.page-about .about-brief__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-brief__tagline {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.28;
  color: var(--ink-900);
}

.page-about .about-brief__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  border-top: 1px solid rgba(30, 43, 52, 0.14);
  padding-top: 18px;
}

.page-about .about-brief__list li {
  display: grid;
  gap: 2px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-brief__list span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #6C7A84;
}

.page-about .about-brief__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .about-brief__link {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-800);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-about .about-brief__link:hover,
.page-about .about-brief__link:focus-visible {
  color: var(--orange);
}

/* ---------- 公共标题 ---------- */

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper-white);
}

.page-about .section {
  padding-top: clamp(48px, 7vw, 88px);
}

/* ---------- 时间轴 ---------- */

.page-about .about-track__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
}

.page-about .about-track__note {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--fog);
  margin: 0;
}

.page-about .about-track__figure {
  margin: clamp(20px, 3vw, 32px) 0 clamp(12px, 2vw, 20px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about .about-track__figure img {
  width: 100%;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.88);
}

.page-about .about-track__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-track__item {
  position: relative;
  padding: 20px 0 20px 20px;
  border-left: 2px solid var(--line);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--slate);
  border: 2px solid var(--fog);
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-track__item:hover,
.page-about .about-track__item:focus-within {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.08), transparent 62%);
}

.page-about .about-track__item:hover::before,
.page-about .about-track__item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-track__year {
  display: block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mint);
  margin-bottom: 6px;
}

.page-about .about-track__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.2;
  color: var(--paper-white);
}

.page-about .about-track__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

.page-about .about-track__more {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--fog);
  opacity: 0.72;
  transition: opacity 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .about-track__item:hover .about-track__more,
.page-about .about-track__item:focus-within .about-track__more {
  opacity: 1;
  color: var(--orange-soft);
}

/* ---------- 编辑标准 ---------- */

.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-standard__steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-standard__steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--slate);
  border: 1px solid var(--line-soft);
}

.page-about .about-standard__steps li:nth-child(2) {
  border-left: 3px solid var(--orange);
}

.page-about .about-step__num {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 2px;
}

.page-about .about-standard__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper-white);
}

.page-about .about-standard__steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog);
}

.page-about .about-standard__sub {
  margin: 22px 0 0;
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-standard__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about .about-standard__figure img {
  width: 100%;
  object-fit: cover;
}

/* ---------- 团队与观察员 ---------- */

.page-about .about-team__head {
  max-width: 60ch;
}

.page-about .about-team__tabs {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-team__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .tab {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: var(--slate);
  color: var(--fog);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.page-about .tab:hover {
  color: var(--paper-white);
  border-color: var(--fog);
}

.page-about .tab[aria-selected="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

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

.page-about .tabpanel {
  padding: 20px 0 0;
}

.page-about .tabpanel p {
  margin: 0 0 12px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--fog);
}

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

.page-about .about-network {
  margin-top: clamp(32px, 5vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-about .about-network__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about .about-network__figure img {
  width: 100%;
  object-fit: cover;
  filter: brightness(0.9);
}

.page-about .about-network__body h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.24;
  color: var(--paper-white);
}

.page-about .about-network__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--fog);
  max-width: 60ch;
}

.page-about .about-cities {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 8px;
}

.page-about .about-cities li {
  text-align: center;
  font-size: 13px;
  padding: 8px 6px;
  border-radius: var(--radius-pill);
  background: var(--slate);
  border: 1px solid var(--line-soft);
  color: var(--fog);
}

/* ---------- 合作 ---------- */

.page-about .about-partner__grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-partner__item {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-partner__item:hover {
  border-color: rgba(255, 107, 53, 0.55);
  box-shadow: 0 16px 40px -28px rgba(5, 11, 16, 1);
}

.page-about .about-partner__index {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-partner__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper-white);
}

.page-about .about-partner__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog);
}

.page-about .about-partner__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog);
  max-width: 72ch;
}

.page-about .about-partner__note a {
  color: var(--mint);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  margin-left: 4px;
}

.page-about .about-partner__note a:hover,
.page-about .about-partner__note a:focus-visible {
  color: var(--paper-white);
}

/* ---------- 节奏与记分牌 ---------- */

.page-about .about-rhythm__grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-rhythm__col {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--slate);
  border: 1px solid var(--line-soft);
}

.page-about .about-rhythm__col-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

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

.page-about .about-rhythm__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--fog);
}

.page-about .about-rhythm__list strong {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-rhythm__col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog);
}

.page-about .about-scoreboard {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-score {
  background: var(--ink-900);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-score__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  color: var(--paper-white);
}

.page-about .about-score:nth-child(1) .about-score__num {
  color: var(--orange);
}

.page-about .about-score:nth-child(3) .about-score__num {
  color: var(--mint);
}

.page-about .about-score__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--fog);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-about .about-partner__grid,
  .page-about .about-rhythm__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 5vw, 64px);
  }

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

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

  .page-about .about-track__item {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 4px 24px;
    padding: 24px 0 24px 30px;
  }

  .page-about .about-track__year {
    font-size: 15px;
    padding-top: 4px;
    margin-bottom: 0;
  }
}
<<<END>>>