.page-about {
  background: var(--ink);
  color: var(--white);
  overflow-x: clip;
}

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

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 2rem) 0 3rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 8% 0%, rgba(45, 240, 206, 0.18), transparent 58%),
    radial-gradient(90% 70% at 96% 18%, rgba(143, 61, 255, 0.22), transparent 62%),
    linear-gradient(180deg, rgba(6, 10, 18, 0.6) 0%, rgba(6, 10, 18, 0.9) 64%, var(--ink) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(112deg, rgba(174, 187, 208, 0.07) 0 1px, transparent 1px 64px);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero-eyebrow {
  margin-top: 1.5rem;
  color: var(--cyan);
  letter-spacing: 0.28em;
}

.page-about .about-hero-title {
  margin: 1rem 0 0;
}

.page-about .about-hero-title-main {
  display: block;
  font-size: clamp(2.3rem, 7vw, 5.2rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-hero-title-sub {
  display: block;
  margin-top: 0.4rem;
  font-size: clamp(1.55rem, 4.4vw, 3.1rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-hero-lede {
  max-width: 62ch;
  margin-top: 1.6rem;
  color: var(--mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-hero-stats {
  display: grid;
  gap: 1.25rem;
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.page-about .about-hero-stat dt {
  margin-bottom: 0.5rem;
  font: 600 0.68rem/1 var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-hero-stat dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--white);
}

.page-about .about-stat-num {
  margin-right: 0.4rem;
  font: 700 1.65rem/1 var(--font-mono);
  color: var(--cyan);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-jump {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.page-about .about-jump-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump-inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump-label {
  flex: 0 0 auto;
  font: 600 0.68rem/1 var(--font-mono);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-jump-list {
  display: flex;
  flex: 0 0 auto;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--white);
  font-size: 0.85rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-about .about-jump-list a:hover,
.page-about .about-jump-list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(45, 240, 206, 0.08);
}

.page-about .about-jump-list span {
  font: 700 0.7rem/1 var(--font-mono);
  color: var(--cyan);
}

/* ---------- 暖纸色区块通用 ---------- */
.page-about .section--paper {
  color: var(--text-ink);
}

.page-about .section--paper .eyebrow {
  color: rgba(20, 24, 31, 0.6);
}

.page-about .section--paper .lede {
  color: rgba(20, 24, 31, 0.84);
}

/* ---------- 01 品牌定位 ---------- */
.page-about .about-position-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.page-about .about-position-note {
  padding: 1.15rem 1.25rem;
  border: 2px solid var(--text-ink);
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(20, 24, 31, 0.8);
}

.page-about .about-position-note p {
  margin: 0;
}

.page-about .about-channels {
  display: grid;
  gap: 1rem;
  margin: 2.75rem 0 0;
  padding: 1.75rem 0 0;
  border-top: 2px solid var(--text-ink);
  list-style: none;
}

.page-about .about-channel {
  padding: 1.15rem 1.2rem 1.3rem;
  background: var(--ink);
  color: var(--white);
  border: 2px solid var(--ink);
  border-radius: var(--r-sm);
  box-shadow: 8px 8px 0 rgba(20, 24, 31, 0.18);
}

.page-about .about-channel-num {
  display: block;
  margin-bottom: 0.6rem;
  font: 700 0.72rem/1 var(--font-mono);
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-channel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-about .about-channel p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 02 版本演进 ---------- */
.page-about .about-timeline {
  background-image: radial-gradient(70% 55% at 100% 0%, rgba(143, 61, 255, 0.18), transparent 62%);
}

.page-about .about-track {
  position: relative;
  display: grid;
  gap: 0.85rem;
  margin: 2rem 0 0;
  padding: 0 0 0 2.25rem;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 0.7rem;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 55%, rgba(255, 62, 138, 0) 100%);
  opacity: 0.7;
}

.page-about .about-node {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.22s, transform 0.22s, box-shadow 0.22s;
}

.page-about .about-node:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.page-about .about-node-head {
  margin: 0;
  font-size: 1rem;
}

.page-about .about-node-trigger {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1.1rem 1.25rem;
  color: inherit;
  text-align: left;
}

.page-about .about-node-num {
  flex: 0 0 auto;
  font: 700 0.82rem/1 var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-node-main {
  display: grid;
  flex: 1 1 auto;
  gap: 0.3rem;
  min-width: 0;
}

.page-about .about-node-stage {
  font: 600 0.68rem/1 var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-node-title {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-node-icon {
  flex: 0 0 auto;
  color: var(--orange);
}

.page-about .about-node-panel {
  padding: 0 1.25rem 1.3rem 3.05rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-node-panel p {
  margin: 0;
}

/* ---------- 03 多联赛覆盖 ---------- */
.page-about .about-leagues-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.page-about .about-leagues-media {
  margin: 0;
}

.page-about .about-tabs {
  margin-top: 1.75rem;
}

.page-about .about-tabs .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.15rem;
}

.page-about .about-tabs .tab {
  padding: 0.45rem 1.05rem;
  border: 2px solid rgba(20, 24, 31, 0.2);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--text-ink);
  font: 600 0.82rem/1.4 var(--font-sans);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}

.page-about .about-tabs .tab:hover {
  border-color: rgba(20, 24, 31, 0.45);
}

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

.page-about .about-tab-panel {
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-ink);
}

.page-about .about-tab-panel p {
  margin: 0;
}

.page-about .about-leagues-note {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--orange);
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(20, 24, 31, 0.72);
}

/* ---------- 04 运营团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.page-about .about-team-roles {
  margin-top: 1.75rem;
}

.page-about .about-role {
  border-top: 3px solid var(--cyan);
  border-radius: var(--r-sm);
  padding: 1.15rem 1.2rem;
}

.page-about .about-role .card-title {
  margin-bottom: 0.55rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-role .card-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-team-note {
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team-media {
  margin: 0;
}

/* ---------- 05 长期方向 ---------- */
.page-about .about-direction-list {
  display: grid;
  gap: 0.85rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-direction-list li {
  padding: 1.1rem 1.2rem;
  border: 2px solid var(--text-ink);
  border-radius: var(--r-sm);
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(20, 24, 31, 0.82);
}

.page-about .about-direction-list strong {
  display: block;
  margin-bottom: 0.5rem;
  font: 700 0.72rem/1 var(--font-mono);
  letter-spacing: 0.2em;
  color: var(--violet);
}

.page-about .about-direction-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-direction-cta .btn-ghost {
  color: var(--text-ink);
  border-color: rgba(20, 24, 31, 0.34);
}

.page-about .about-direction-cta .btn-ghost:hover,
.page-about .about-direction-cta .btn-ghost:focus-visible {
  border-color: var(--text-ink);
  background: rgba(20, 24, 31, 0.06);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-position-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 2.5rem;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 3.5rem) 0 4.5rem;
  }

  .page-about .about-leagues-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .about-team-media {
    order: 2;
  }
}

@media (min-width: 1060px) {
  .page-about .about-channels {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .about-hero-actions .btn {
    width: 100%;
  }

  .page-about .about-track {
    padding-left: 1.6rem;
  }

  .page-about .about-track::before {
    left: 0.4rem;
  }

  .page-about .about-node-panel {
    padding-left: 1.25rem;
  }
}