/* ===== page: about ===== */
.page-about {
  --about-sec-pad: clamp(48px, 7vw, 84px);
  display: block;
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-sec {
  padding: var(--about-sec-pad) 0;
  border-top: var(--line);
}

.page-about .about-crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 clamp(44px, 6vw, 72px);
  border-bottom: var(--line);
}

.page-about .about-hero__edge {
  position: absolute;
  top: 0;
  right: 0;
  width: 52%;
  height: 100%;
  pointer-events: none;
  background:
    linear-gradient(158deg,
      transparent calc(50% - 1px),
      rgba(27, 84, 214, .09) calc(50% - 1px),
      rgba(27, 84, 214, .09) calc(50% + 38px),
      transparent calc(50% + 38px));
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: 40px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(54px, 13vw, 116px);
  line-height: .92;
  letter-spacing: -.035em;
  color: var(--c-ink);
}

.page-about .about-hero__sub {
  margin: 18px 0 0;
  max-width: 20em;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(19px, 3.4vw, 26px);
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--c-ink);
}

.page-about .about-hero__fact {
  position: relative;
  padding: 20px 14px 20px 0;
  border-bottom: var(--line);
}

.page-about .about-hero__fact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--c-ink);
}

.page-about .about-hero__fact--red::before { background: var(--c-red); }
.page-about .about-hero__fact--blue::before { background: var(--c-blue); }

.page-about .about-hero__factLabel {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .12em;
  color: var(--c-stone);
}

.page-about .about-hero__factValue {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--c-ink);
}

.page-about .about-hero__unit {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--c-stone);
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: end;
  }
  .page-about .about-hero__fact {
    padding-right: 24px;
  }
}

/* ---------- 通用章节标题 ---------- */
.page-about .about-head {
  margin-bottom: 32px;
}

.page-about .about-head__title {
  margin: 12px 0 0;
  max-width: 22em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--c-ink);
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-ink);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__inner {
  display: grid;
  gap: 34px;
}

.page-about .about-origin__text {
  border-left: 2px solid var(--c-red);
  padding-left: 22px;
}

.page-about .about-origin__title {
  margin: 12px 0 0;
  max-width: 18em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.22;
  letter-spacing: -.02em;
}

.page-about .about-origin__prose {
  margin-top: 20px;
}

.page-about .about-origin__prose p {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
}

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

.page-about .about-origin__media .media__frame {
  aspect-ratio: 3 / 2;
}

.page-about .about-origin__media .media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-origin__media .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--c-stone);
}

@media (min-width: 960px) {
  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 发展历程 ---------- */
.page-about .about-history__figure {
  margin: 0;
  border: var(--line);
  background: var(--c-white);
}

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

.page-about .about-history__caption {
  padding: 10px 14px;
  border-top: var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--c-stone);
}

.page-about .about-history__list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: var(--line);
}

.page-about .about-history__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 22px 0;
  border-bottom: var(--line);
  transition: border-color var(--t-fast) ease;
}

.page-about .about-history__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background var(--t-fast) ease;
  pointer-events: none;
}

.page-about .about-history__year {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .06em;
  color: var(--c-clay);
}

.page-about .about-history__year::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--c-clay);
}

.page-about .about-history__name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-history__note {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-history__more {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-stone);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--t-mid) ease, opacity var(--t-mid) ease, margin-top var(--t-mid) ease;
}

@media (min-width: 760px) {
  .page-about .about-history__item {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 32px;
    padding: 26px 0 26px 18px;
  }
}

@media (hover: hover) and (min-width: 760px) {
  .page-about .about-history__item:hover::after,
  .page-about .about-history__item:focus-within::after {
    background: var(--c-red);
  }
  .page-about .about-history__item:hover .about-history__more,
  .page-about .about-history__item:focus-within .about-history__more {
    max-height: 240px;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (hover: none), (max-width: 759px) {
  .page-about .about-history__more {
    max-height: none;
    opacity: 1;
    overflow: visible;
    margin-top: 10px;
  }
}

/* ---------- 场馆五区 ---------- */
.page-about .about-venue__plan {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: var(--line);
  background: var(--ink-16);
}

.page-about .about-venue__zone {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 152px;
  padding: 22px 20px 24px;
  background: var(--c-white);
  color: var(--c-ink);
  transition: background var(--t-mid) ease, color var(--t-mid) ease;
}

.page-about .about-venue__zone:focus-visible {
  outline: none;
}

.page-about .about-venue__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: .16em;
  color: var(--c-stone);
  transition: color var(--t-mid) ease;
}

.page-about .about-venue__name {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.page-about .about-venue__desc {
  margin: 10px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-stone);
  transition: color var(--t-mid) ease;
}

.page-about .about-venue__meter {
  margin-top: auto;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--c-blue);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--t-mid) ease, transform var(--t-mid) ease, color var(--t-mid) ease;
}

/* 阵营色：观赛侧走蓝，对战侧走红 */
.page-about .about-venue__zone--stage:hover,
.page-about .about-venue__zone--stage:focus-visible {
  background: var(--c-blue);
  color: var(--c-paper);
}

.page-about .about-venue__zone--match:hover,
.page-about .about-venue__zone--match:focus-visible {
  background: var(--c-red);
  color: var(--c-paper);
}

.page-about .about-venue__zone--live:hover,
.page-about .about-venue__zone--live:focus-visible,
.page-about .about-venue__zone--train:hover,
.page-about .about-venue__zone--train:focus-visible,
.page-about .about-venue__zone--lounge:hover,
.page-about .about-venue__zone--lounge:focus-visible {
  background: var(--c-ink);
  color: var(--c-paper);
}

.page-about .about-venue__zone:hover .about-venue__idx,
.page-about .about-venue__zone:focus-visible .about-venue__idx {
  color: var(--paper-56);
}

.page-about .about-venue__zone:hover .about-venue__desc,
.page-about .about-venue__zone:focus-visible .about-venue__desc {
  color: var(--paper-56);
}

.page-about .about-venue__zone:hover .about-venue__meter,
.page-about .about-venue__zone:focus-visible .about-venue__meter {
  opacity: 1;
  transform: none;
  color: var(--c-cyan);
}

@media (min-width: 760px) {
  .page-about .about-venue__plan {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .about-venue__zone--stage { grid-column: span 4; }
  .page-about .about-venue__zone--match { grid-column: span 2; }
  .page-about .about-venue__zone--live { grid-column: span 2; }
  .page-about .about-venue__zone--train { grid-column: span 2; }
  .page-about .about-venue__zone--lounge { grid-column: span 2; }
}

@media (hover: none), (max-width: 759px) {
  .page-about .about-venue__meter {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__inner {
  display: grid;
  gap: 38px;
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .about-team__list {
  margin-top: 30px;
  border-top: 2px solid var(--c-ink);
}

.page-about .about-team__item {
  border-bottom: var(--line);
}

.page-about .about-team__summary {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--c-ink);
  transition: color var(--t-fast) ease;
}

.page-about .about-team__item[open] .about-team__num {
  color: var(--c-red);
}

.page-about .about-team__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-team__mark {
  position: relative;
  width: 14px;
  height: 14px;
}

.page-about .about-team__mark::before,
.page-about .about-team__mark::after {
  content: "";
  position: absolute;
  background: var(--c-ink);
  transition: transform var(--t-fast) ease, background var(--t-fast) ease;
}

.page-about .about-team__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .about-team__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .about-team__item[open] .about-team__mark::before {
  background: var(--c-red);
}

.page-about .about-team__item[open] .about-team__mark::after {
  transform: scaleY(0);
}

.page-about .about-team__desc {
  margin: 0 0 18px;
  padding-left: 74px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-team__total {
  margin: 22px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-about .about-team__totalNum {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: .04em;
  color: var(--c-blue);
}

.page-about .about-team__media .media__frame {
  aspect-ratio: 3 / 2;
}

.page-about .about-team__media .media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team__media .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--c-stone);
}

@media (max-width: 600px) {
  .page-about .about-team__desc {
    padding-left: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 承办与合作 ---------- */
.page-about .about-track__inner {
  display: grid;
  gap: 40px;
}

.page-about .about-track__total {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-about .about-track__totalNum {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 42px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--c-red);
  margin-right: 6px;
}

.page-about .about-track__bar {
  padding: 16px 0;
  border-bottom: var(--line);
}

.page-about .about-track__barHead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.page-about .about-track__barLabel {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-track__barValue {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--c-stone);
}

.page-about .about-track__barTrack {
  display: block;
  height: 8px;
  background: var(--ink-08);
}

.page-about .about-track__barFill {
  display: block;
  height: 100%;
  transition: width var(--t-mid) ease;
}

.page-about .about-track__barFill--a { width: 48.5%; background: var(--c-blue); }
.page-about .about-track__barFill--b { width: 30.9%; background: var(--c-red); }
.page-about .about-track__barFill--c { width: 20.6%; background: var(--c-clay); }

.page-about .about-track__sideTitle {
  margin: 28px 0 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .16em;
  color: var(--c-stone);
}

.page-about .about-track__sideTitle:first-child {
  margin-top: 0;
}

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

.page-about .about-track__ecoItem {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-top: var(--line);
}

.page-about .about-track__ecoNum {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--c-blue);
}

.page-about .about-track__ecoText {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
}

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

.page-about .about-track__act {
  padding: 6px 12px;
  border: 1px solid var(--ink-16);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--c-ink);
  transition: border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.page-about .about-track__act:hover {
  border-color: var(--c-red);
  color: var(--c-red);
}

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

.page-about .about-track__memberItem {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: var(--line);
}

.page-about .about-track__memberName {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-ink);
}

.page-about .about-track__memberDesc {
  font-size: 14px;
  color: var(--c-stone);
}

.page-about .about-track__link {
  display: inline-block;
  margin-top: 24px;
  font-size: 15px;
}

@media (min-width: 960px) {
  .page-about .about-track__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
  }
}

/* ---------- 青训 ---------- */
.page-about .about-camp {
  position: relative;
  overflow: hidden;
  padding: clamp(52px, 7vw, 88px) 0;
  background: var(--c-violet);
  color: var(--c-paper);
}

.page-about .about-camp::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, var(--c-red) 0 50%, var(--c-blue) 50% 100%);
  transform: rotate(45deg);
  opacity: .3;
  pointer-events: none;
}

.page-about .about-camp__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-camp__eyebrow {
  color: var(--c-cyan);
}

.page-about .about-camp__title {
  margin: 14px 0 0;
  max-width: 18em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--c-paper);
}

.page-about .about-camp__lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper-56);
}

.page-about .about-camp__tracks {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--paper-16);
  background: var(--paper-16);
}

.page-about .about-camp__track {
  padding: 22px 20px 24px;
  background: var(--c-violet);
}

.page-about .about-camp__trackIdx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-about .about-camp__trackName {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.page-about .about-camp__trackDesc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-56);
}

.page-about .about-camp__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

@media (min-width: 760px) {
  .page-about .about-camp__tracks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}