.page-about {
  --about-num-idle: #4C4E56;
  --about-hero-grad: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--about-hero-grad);
  padding: clamp(28px, 5vw, 56px) 0 clamp(52px, 8vw, 100px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 38px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.6vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--white);
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  margin: clamp(34px, 5vw, 60px) 0 0;
}

.page-about .about-hero__stat {
  border-left: 2px solid var(--red);
  padding-left: 14px;
}

.page-about .about-hero__stat-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-about .about-hero__stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4.2vw, 48px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-hero__stat-num span {
  font-size: 0.44em;
  color: var(--cyan);
  margin-left: 3px;
  letter-spacing: 0;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(52px, 8vw, 124px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter--01 {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
}

.page-about .about-chapter--03 {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .about-chapter--05 {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2.6vw, 36px);
  margin-bottom: 18px;
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 6.4vw, 86px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--about-num-idle);
  transition: color var(--ease), opacity 420ms var(--ease), transform 420ms var(--ease);
}

.page-about .about-chapter__num.reveal-init {
  opacity: 0;
  transform: translateY(16px);
}

.page-about .about-chapter__num.reveal-init.is-in {
  opacity: 1;
  transform: none;
  color: var(--red);
}

.page-about .about-chapter__title {
  margin: 0;
  padding-top: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.9vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.012em;
  color: var(--white);
  max-width: 26ch;
}

.page-about .about-band {
  height: 3px;
  margin-bottom: clamp(28px, 4vw, 54px);
  background: linear-gradient(90deg, var(--red) 0%, var(--red-deep) 46%, var(--ink-3) 100%);
  transition: width 400ms var(--ease);
}

.page-about .about-chapter--01 .about-band { width: 100%; }
.page-about .about-chapter--02 .about-band { width: 86%; }
.page-about .about-chapter--03 .about-band { width: 72%; }
.page-about .about-chapter--04 .about-band { width: 58%; }
.page-about .about-chapter--05 .about-band { width: 44%; }
.page-about .about-chapter--06 .about-band { width: 30%; }

.page-about .about-chapter__lead {
  margin: 0 0 clamp(26px, 4vw, 48px);
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-chapter a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 214, 0.35);
  transition: border-color var(--ease), color var(--ease);
}

.page-about .about-chapter a:hover {
  color: var(--white);
  border-color: var(--cyan);
}

.page-about .about-chapter a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 01 起源 ---------- */
.page-about .about-origin {
  align-items: start;
}

.page-about .about-origin__prose {
  padding: clamp(22px, 3.2vw, 48px);
}

.page-about .about-origin__prose p {
  margin: 0 0 1.1em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

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

.page-about .about-origin__side {
  margin-top: 28px;
}

.page-about .about-origin__side-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
}

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

.page-about .about-origin__item:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-about .about-origin__tag {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
}

.page-about .about-origin__item-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-origin__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 02 流程 ---------- */
.page-about .about-flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}

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

.page-about .about-flow__media img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: about-flow;
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 0 20px 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.16);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-flow__step:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(41, 242, 214, 0.18);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team-layout {
  align-items: start;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-team__role {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.page-about .about-team__unit {
  font-size: 0.52em;
  color: var(--muted);
  margin-left: 3px;
}

.page-about .about-team__track {
  height: 6px;
  background: var(--ink-3);
  overflow: hidden;
}

.page-about .about-team__fill {
  height: 100%;
  width: 0;
  transition: width 620ms var(--ease);
}

.page-about .about-team__fill--edit { width: 38%; background: var(--red); }
.page-about .about-team__fill--dev { width: 41%; background: var(--cyan); }
.page-about .about-team__fill--venue { width: 16%; background: var(--orange); }
.page-about .about-team__fill--support { width: 5%; background: var(--muted); }

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team__media {
  margin: 30px 0 0;
}

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

/* ---------- 04 场馆 ---------- */
.page-about .about-venues__banner {
  margin: 0 0 clamp(28px, 4vw, 52px);
}

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

.page-about .about-venues__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 48px);
}

.page-about .about-venues__hub {
  padding: clamp(20px, 3vw, 34px);
  background: linear-gradient(160deg, var(--red) 0%, var(--red-deep) 100%);
  color: var(--white);
}

.page-about .about-venues__hub-label {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 14px;
}

.page-about .about-venues__hub-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(56px, 10vw, 118px);
  line-height: 0.88;
  letter-spacing: -0.05em;
}

.page-about .about-venues__hub-unit {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-venues__hub-text {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .about-venues__cities-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-venues__cities {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-venues__city {
  padding: 14px 8px;
  text-align: center;
  background: var(--ink-2);
  font-size: 14px;
  color: var(--text);
  transition: background var(--ease), color var(--ease);
}

.page-about .about-venues__city:hover {
  background: var(--ink-3);
  color: var(--cyan);
}

.page-about .about-venues__cities-text {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-venues__tags {
  margin-top: clamp(28px, 4vw, 52px);
  padding-top: clamp(22px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.page-about .about-venues__tags-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-venues__tag-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-venues__tags-text {
  margin: 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 05 数据带 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metrics__cell {
  background: var(--ink-2);
  padding: clamp(20px, 3vw, 34px) clamp(16px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background var(--ease);
}

.page-about .about-metrics__cell:hover {
  background: var(--ink-3);
}

.page-about .about-metrics__cell--wide {
  background: linear-gradient(135deg, var(--red-deep) 0%, var(--red) 100%);
}

.page-about .about-metrics__cell--wide .about-metrics__num,
.page-about .about-metrics__cell--wide .about-metrics__label {
  color: var(--white);
}

.page-about .about-metrics__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--white);
}

.page-about .about-metrics__unit {
  font-size: 0.42em;
  margin-left: 3px;
  color: var(--cyan);
  letter-spacing: 0;
}

.page-about .about-metrics__cell--wide .about-metrics__unit {
  color: rgba(255, 255, 255, 0.8);
}

.page-about .about-metrics__label {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-metrics__foot {
  margin-top: clamp(26px, 3.6vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-metrics__foot p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 06 认可与收束 ---------- */
.page-about .about-honor {
  align-items: start;
}

.page-about .about-honor__col {
  padding-top: 6px;
}

.page-about .about-honor__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-honor__item {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-honor__col .about-honor__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-honor__text {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: clamp(26px, 3.6vw, 44px);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.012em;
}

.page-about .about-cta__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.82;
  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__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-metrics__cell--wide {
    grid-column: span 3;
  }

  .page-about .about-metrics__foot {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-team__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: center;
    gap: 14px 20px;
  }

  .page-about .about-team__desc {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__side {
    margin-top: 0;
    padding-left: clamp(20px, 2.6vw, 38px);
    border-left: 1px solid var(--line);
  }

  .page-about .about-chapter__title {
    max-width: 30ch;
  }

  .page-about .about-flow-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-flow__media {
    position: sticky;
    top: 128px;
  }

  .page-about .about-flow__step {
    padding: 24px 0 24px 30px;
  }

  .page-about .about-team__media {
    margin-top: 0;
  }

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

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

@media (min-width: 1200px) {
  .page-about .about-team__row {
    grid-template-columns: 180px minmax(0, 1fr) minmax(0, 340px);
  }

  .page-about .about-team__desc {
    grid-column: auto;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-metrics__cell--wide {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chapter__num,
  .page-about .about-team__fill,
  .page-about .about-band,
  .page-about .about-flow__step::before {
    transition: none;
  }

  .page-about .about-chapter__num.reveal-init {
    opacity: 1;
    transform: none;
  }
}