.page-about {
  --about-pad: clamp(52px, 7vw, 96px);
  --about-gap: clamp(22px, 3vw, 40px);
  --about-ink-soft: var(--ink-soft);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 56px;
  color: var(--white);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(200, 16, 46, 0.42), transparent 58%),
    radial-gradient(95% 80% at 98% 22%, rgba(21, 83, 255, 0.34), transparent 62%),
    linear-gradient(158deg, var(--navy) 0%, var(--navy-2) 64%, var(--navy) 100%);
}

.page-about .about-hero__lines {
  position: absolute;
  inset: -25% -12%;
  pointer-events: none;
  background: repeating-linear-gradient(
    116deg,
    transparent 0 42px,
    rgba(21, 83, 255, 0.12) 42px 43px
  );
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
}

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

.page-about .about-hero .breadcrumb__list,
.page-about .about-hero .breadcrumb__item {
  color: var(--silver);
}

.page-about .about-hero .breadcrumb__item a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark-strong);
}

.page-about .about-hero .breadcrumb__item a:hover {
  color: var(--white);
  border-bottom-color: var(--yellow);
}

.page-about .about-hero__idx {
  margin: 26px 0 14px;
  color: var(--yellow);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(38px, 8.6vw, 104px);
  line-height: 0.96;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.page-about .about-hero__mark {
  display: inline-block;
  background: linear-gradient(96deg, var(--red) 0%, #FF5A6E 46%, var(--blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__cols {
  display: grid;
  gap: 30px;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 0;
  color: var(--silver);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--red);
}

.page-about .about-stat:nth-child(2) { border-left-color: var(--blue); }
.page-about .about-stat:nth-child(3) { border-left-color: var(--silver); }
.page-about .about-stat:nth-child(4) { border-left-color: var(--yellow); }

.page-about .about-stat__val {
  font-size: 22px;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-stat__key {
  font-size: 13px;
  color: var(--silver);
}

/* ---------- 章节索引（浮层） ---------- */
.page-about .about-spy {
  display: none;
}

/* ---------- 通用小标题 ---------- */
.page-about .about-h2 {
  margin: 0 0 22px;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.24;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .about-h2::before {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--red), var(--blue));
}

/* ---------- 品牌主张 ---------- */
.page-about .about-why {
  background: var(--white);
}

.page-about .about-why__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-why__aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-why__code {
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .about-why__body p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-pull {
  margin: 26px 0 0;
  padding: 18px 0 18px 22px;
  border-left: 3px solid var(--red);
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.6;
  font-weight: 500;
  color: var(--navy);
  background: linear-gradient(90deg, rgba(200, 16, 46, 0.06), transparent 72%);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  position: relative;
  overflow: hidden;
}

.page-about .about-history__texture {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.page-about .about-history__texture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  filter: saturate(0.7);
}

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

.page-about .about-history .section-head__title,
.page-about .about-history .section-head__note,
.page-about .about-history .section-head__idx {
  color: var(--white);
}

.page-about .about-history .section-head__note {
  color: var(--silver);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-timeline {
  display: grid;
  gap: 14px;
}

.page-about .about-node {
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--blue);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  border-left-color: var(--red);
  box-shadow: var(--shadow-glow);
}

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

.page-about .about-node__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 16px;
  border: 0;
  background: transparent;
  color: var(--white);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-node__year {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--yellow);
  white-space: nowrap;
}

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

.page-about .about-node .accordion__idx {
  display: none;
  font-size: 12px;
  color: var(--silver);
  letter-spacing: 0.08em;
}

.page-about .about-node__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  transition: transform 0.24s var(--ease);
}

.page-about .about-node__icon::before,
.page-about .about-node__icon::after {
  content: "";
  position: absolute;
  background: var(--yellow);
}

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

.page-about .about-node__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: transform 0.24s var(--ease);
}

.page-about .about-node[data-open] .about-node__icon::after {
  transform: scaleY(0);
}

.page-about .about-node:not([data-open]) .accordion__panel {
  display: none;
}

.page-about .about-node[data-open] .accordion__panel {
  display: block;
}

.page-about .about-node__panel {
  padding: 0 16px 18px;
}

.page-about .about-node__panel p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

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

/* ---------- 空间布局 ---------- */
.page-about .about-space {
  background: var(--fog);
}

.page-about .about-space__head {
  margin-bottom: 26px;
}

.page-about .about-space__figure {
  margin: 0 0 28px;
}

.page-about .about-space__figure .media__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .about-zones {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-zone {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--white);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--red);
  border-radius: var(--radius-sm);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-zone--esport { border-top-color: var(--blue); }
.page-about .about-zone--bar { border-top-color: var(--silver); }
.page-about .about-zone--club { border-top-color: var(--yellow); }

.page-about .about-zone:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.page-about .about-zone__code {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-zone__name {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-zone__desc {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

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

.page-about .about-zone__meta li {
  padding: 4px 9px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--navy);
  background: var(--fog);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-xs);
}

.page-about .about-space__facts {
  display: grid;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-space__facts li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-space__facts .mono {
  font-size: 12px;
  line-height: 1.9;
  color: var(--white);
  text-align: center;
  background: var(--navy);
  border-radius: var(--radius-xs);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--white);
}

.page-about .about-team__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-team__head {
  margin-bottom: 24px;
}

.page-about .about-team__bars {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-bar {
  padding: 14px 16px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-sm);
  background: var(--fog);
  cursor: default;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-bar:hover,
.page-about .about-bar:focus-within,
.page-about .about-bar:focus {
  border-color: var(--blue);
  background: var(--white);
  outline: none;
}

.page-about .about-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-bar__role {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-bar__num {
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

.page-about .about-bar__track {
  height: 8px;
  background: rgba(11, 15, 26, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  transition: width 0.5s var(--ease-out);
}

.page-about .about-bar:nth-child(1) .about-bar__fill { width: 49%; background: linear-gradient(90deg, var(--red), var(--red-deep)); }
.page-about .about-bar:nth-child(2) .about-bar__fill { width: 21%; background: linear-gradient(90deg, var(--blue), var(--blue-deep)); }
.page-about .about-bar:nth-child(3) .about-bar__fill { width: 19%; background: linear-gradient(90deg, #9AA6B8, #6C7A90); }
.page-about .about-bar:nth-child(4) .about-bar__fill { width: 12%; background: linear-gradient(90deg, var(--yellow), #C9A800); }

.page-about .about-bar__note {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
}

.page-about .about-bar:hover .about-bar__note,
.page-about .about-bar:focus-within .about-bar__note,
.page-about .about-bar:focus .about-bar__note {
  max-height: 140px;
  margin-top: 12px;
  opacity: 1;
}

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

.page-about .about-team__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 赛事与社群 ---------- */
.page-about .about-league {
  background: var(--navy);
  color: var(--white);
}

.page-about .about-league .section-head__title,
.page-about .about-league .section-head__idx {
  color: var(--white);
}

.page-about .about-league .section-head__note {
  color: var(--silver);
}

.page-about .about-ladder {
  display: grid;
  gap: 12px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
}

.page-about .about-ladder__item {
  position: relative;
  padding: 20px 18px;
  background: var(--glass);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-ladder__item:hover {
  border-color: var(--blue);
  transform: translateY(-3px);
}

.page-about .about-ladder__step {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yellow);
}

.page-about .about-ladder__name {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-ladder__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--silver);
}

.page-about .about-eco {
  display: grid;
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-eco__title {
  margin: 0 0 14px;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-eco__main p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-eco__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .about-eco__links .text-link {
  color: var(--yellow);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 226, 77, 0.45);
  padding-bottom: 2px;
}

.page-about .about-eco__links .text-link:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-about .about-eco__nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__nums li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  background: var(--navy-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
}

.page-about .about-eco__num {
  font-size: 24px;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-eco__key {
  font-size: 13px;
  color: var(--silver);
}

/* ---------- 资质与认可 ---------- */
.page-about .about-accredit {
  background: var(--white);
}

.page-about .about-accredit__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-cert {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cert__item {
  padding: 20px 18px;
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius-sm);
  background: var(--fog);
  transition: border-left-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-cert__item:hover {
  border-left-color: var(--red);
  background: var(--white);
}

.page-about .about-cert__code {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

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

.page-about .about-cert__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 58%, var(--red-deep) 140%);
  color: var(--white);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.26;
  font-weight: 700;
  color: var(--white);
}

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

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about [data-reveal] {
  transition: opacity 0.36s var(--ease-out), transform 0.36s var(--ease-out);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 移动端补充 ---------- */
@media (max-width: 767px) {
  .page-about .about-bar__note {
    max-height: none;
    margin-top: 12px;
    opacity: 1;
  }

  .page-about .about-node__trigger {
    grid-template-columns: auto 1fr auto;
    padding: 14px 14px;
    font-size: 15px;
  }
}

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

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

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

  .page-about .about-node__trigger {
    padding: 18px 22px;
    font-size: 17px;
  }

  .page-about .about-node__panel {
    padding: 0 22px 22px;
  }

  .page-about .about-node .accordion__idx {
    display: inline;
  }

  .page-about .about-hero {
    padding: 44px 0 72px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__cols {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-why__grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-why__aside {
    position: sticky;
    top: 100px;
    align-self: start;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 100px;
  }

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

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-accredit__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }

  /* 斜向时间轴轨道 */
  .page-about .about-history__inner {
    position: relative;
  }

  .page-about .about-rail {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 190px;
    bottom: 0;
    width: 100%;
    height: calc(100% - 190px);
    pointer-events: none;
    z-index: 0;
  }

  .page-about .about-timeline {
    position: relative;
    z-index: 1;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px 0;
  }

  .page-about .about-node:nth-child(1) { grid-column: 1 / span 7; }
  .page-about .about-node:nth-child(2) { grid-column: 4 / span 7; }
  .page-about .about-node:nth-child(3) { grid-column: 2 / span 7; }
  .page-about .about-node:nth-child(4) { grid-column: 5 / span 7; }
}

/* ---------- 宽屏：章节浮动索引 ---------- */
@media (min-width: 1200px) {
  .page-about .about-spy {
    display: block;
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    width: 152px;
    padding: 14px 12px 12px;
    background: var(--navy);
    border: 1px solid var(--line-dark-strong);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-card);
  }

  .page-about .about-spy__title {
    margin: 0 0 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line-dark);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--yellow);
  }

  .page-about .about-spy .spy-nav__link {
    display: block;
    padding: 6px 8px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--silver);
    text-decoration: none;
    border-radius: var(--radius-xs);
    transition: color 0.2s var(--ease), background 0.2s var(--ease);
  }

  .page-about .about-spy .spy-nav__link:hover {
    color: var(--white);
    background: var(--navy-2);
  }

  .page-about .about-spy .spy-nav__link[data-active] {
    color: var(--white);
    background: var(--red);
  }

  .page-about .about-spy .spy-nav__current {
    margin: 10px 0 0;
    padding-top: 9px;
    border-top: 1px solid var(--line-dark);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--silver);
  }

  .page-about .about-spy .spy-nav__current span[data-spy-current] {
    color: var(--yellow);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-zone:hover,
  .page-about .about-ladder__item:hover {
    transform: none;
  }

  .page-about .about-bar__fill,
  .page-about .about-bar__note,
  .page-about [data-reveal] {
    transition: none;
  }
}