.page-about {
  --about-text: var(--chalk-100);
  --about-muted: var(--text-soft);
  --about-hair: rgba(23, 19, 16, 0.14);
  background: var(--ember-900);
  color: var(--chalk-100);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: clamp(16px, 3vw, 26px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--flame-400);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--cyber-300);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(44px, 7vw, 92px);
  border-bottom: var(--line);
  background:
    radial-gradient(120% 100% at 86% 0%, rgba(232, 68, 42, 0.24), transparent 58%),
    radial-gradient(90% 80% at 2% 100%, rgba(23, 179, 201, 0.16), transparent 62%);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 54px);
  align-items: end;
}

.page-about .about-hero-title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--chalk-100);
}

.page-about .about-hero-lede {
  margin: 22px 0 0;
  max-width: 44ch;
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border: var(--line);
  box-shadow: var(--shadow-lift);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.04);
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 16, 14, 0) 42%, rgba(20, 16, 14, 0.58));
  pointer-events: none;
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  position: relative;
  padding: clamp(46px, 6.5vw, 92px) 0;
}

.page-about .about-block--dark {
  background: var(--ember-900);
  color: var(--chalk-100);
}

.page-about .about-block--ink {
  background: var(--ember-800);
  color: var(--chalk-100);
  border-top: var(--line);
  border-bottom: var(--line);
}

.page-about .about-block--paper {
  --about-text: var(--ink-900);
  --about-muted: var(--text-ink-soft);
  background: var(--chalk-100);
  color: var(--ink-900);
}

.page-about .about-block--paper .h-section,
.page-about .about-block--paper .h-sub {
  color: var(--ink-900);
}

.page-about .about-block-head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-block-head .kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-about .about-block-head .kicker::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  background: var(--flame-600);
}

.page-about .about-block--paper .about-block-head .kicker {
  color: var(--ink-900);
}

.page-about .about-block-head .h-section {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-head-note {
  margin: 16px 0 0;
  max-width: 44ch;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .h-sub {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--about-text);
}

/* ---------- 01 控球率 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-split-main p {
  margin: 0 0 18px;
  max-width: 44ch;
  line-height: 1.85;
  color: var(--about-muted);
}

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

.page-about .about-split-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-quadrant {
  border: 1px solid var(--ember-700);
  background: var(--ember-900);
  padding: 26px 24px 22px;
  transform: rotate(-0.8deg);
  box-shadow: var(--shadow-lift);
  max-width: 420px;
}

.page-about .about-quadrant-grid {
  position: relative;
  aspect-ratio: 1 / 0.82;
  border: 1px solid var(--ember-700);
  background:
    linear-gradient(to right, transparent calc(50% - 0.5px), var(--ember-700) calc(50% - 0.5px), var(--ember-700) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(to bottom, transparent calc(50% - 0.5px), var(--ember-700) calc(50% - 0.5px), var(--ember-700) calc(50% + 0.5px), transparent calc(50% + 0.5px));
}

.page-about .about-quadrant-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.page-about .about-quadrant-dot--a {
  top: 20%;
  left: 62%;
  background: var(--flame-600);
  box-shadow: 0 0 0 5px rgba(232, 68, 42, 0.2);
}

.page-about .about-quadrant-dot--b {
  bottom: 24%;
  left: 22%;
  background: var(--cyber-500);
  box-shadow: 0 0 0 5px rgba(23, 179, 201, 0.2);
}

.page-about .about-quadrant-axis {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.page-about .about-quadrant-axis--y {
  margin-top: 12px;
}

.page-about .about-quadrant-axis--x {
  margin-top: 4px;
}

.page-about .about-quadrant-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-soft);
}

.page-about .about-quadrant-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .about-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.page-about .about-dot--flame {
  background: var(--flame-600);
}

.page-about .about-dot--cyan {
  background: var(--cyber-500);
}

.page-about .about-quadrant-note {
  margin: 0;
  max-width: 42ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 02 球队档案 ---------- */

.page-about .about-archive {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-about .about-file-card {
  position: relative;
  border: 1px solid var(--ember-700);
  background: var(--ember-800);
  padding: 20px 22px 22px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-file-card + .about-file-card {
  margin-top: 14px;
}

.page-about .about-file-card:nth-child(odd) {
  transform: rotate(-0.35deg);
}

.page-about .about-file-card:nth-child(even) {
  transform: rotate(0.4deg);
}

.page-about .about-file-card:hover,
.page-about .about-file-card:focus-within {
  transform: translateY(-2px) rotate(0deg);
  border-color: var(--flame-600);
  box-shadow: var(--shadow-lift);
}

.page-about .about-file-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyber-300);
}

.page-about .about-file-card .h-sub {
  margin: 10px 0 8px;
  color: var(--chalk-100);
}

.page-about .about-file-card p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

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

.page-about .about-archive-media img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--line);
  object-fit: cover;
}

.page-about .about-archive-media .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

@media (min-width: 900px) {
  .page-about .about-archive {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

/* ---------- 03 数据来源 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  counter-reset: flow;
}

.page-about .about-flow-step {
  position: relative;
  border: 1px solid var(--ember-700);
  border-left: 3px solid var(--flame-600);
  background: var(--ember-900);
  padding: 22px 22px 24px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-flow-step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-flow-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber-400);
}

.page-about .about-flow-step .h-sub {
  margin: 10px 0 8px;
  color: var(--chalk-100);
}

.page-about .about-flow-step p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

@media (min-width: 820px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 04 团队 ---------- */

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

.page-about .about-team-card {
  position: relative;
  border: 1px solid var(--about-hair);
  background: rgba(23, 19, 16, 0.04);
  padding: 22px 20px 24px;
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 3px;
  background: var(--flame-600);
}

.page-about .about-team-card:hover,
.page-about .about-team-card:focus-within {
  transform: translateY(-2px);
  background: rgba(23, 19, 16, 0.08);
  box-shadow: 0 14px 30px rgba(23, 19, 16, 0.12);
}

.page-about .about-team-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--flame-600);
}

.page-about .about-team-card .h-sub {
  margin: 10px 0 4px;
}

.page-about .about-team-count {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyber-500);
}

.page-about .about-team-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-muted);
}

.page-about .about-team-media {
  margin: clamp(30px, 4vw, 52px) 0 0;
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-hair);
  object-fit: cover;
}

.page-about .about-team-media .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-ink-soft);
}

@media (min-width: 640px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 05 发展历程 ---------- */

.page-about .about-timeline-block {
  border-top: var(--line);
}

.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-timeline-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.page-about .about-timeline-rail li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-about .about-timeline-rail a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  transition: color 0.2s var(--ease);
}

.page-about .about-timeline-rail a:hover,
.page-about .about-timeline-rail a:focus-visible {
  color: var(--flame-400);
}

.page-about .about-timeline-rail a .num {
  color: var(--chalk-100);
}

.page-about .about-timeline-rail a:hover .num,
.page-about .about-timeline-rail a:focus-visible .num {
  color: var(--flame-400);
}

.page-about .about-era {
  border-left: 2px solid var(--ember-700);
  padding: 0 0 0 20px;
  margin: 0 0 34px;
  transition: border-color 0.25s var(--ease);
}

.page-about .about-era:target {
  border-left-color: var(--flame-600);
}

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

.page-about .about-era-tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyber-300);
}

.page-about .about-era .h-sub {
  margin: 8px 0 8px;
  color: var(--chalk-100);
}

.page-about .about-era p:last-child {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: 190px minmax(0, 1fr);
  }

  .page-about .about-timeline-rail {
    display: block;
    overflow: visible;
    padding: 0 0 0 22px;
    position: sticky;
    top: 120px;
    align-self: start;
    border-left: 1px solid var(--ember-700);
  }

  .page-about .about-timeline-rail li {
    position: relative;
    padding: 7px 0;
  }

  .page-about .about-timeline-rail li::before {
    content: "";
    position: absolute;
    left: -28px;
    top: 14px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    border: 2px solid var(--flame-600);
    background: var(--ember-900);
  }

  .page-about .about-timeline-rail a {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .page-about .about-era {
    padding-left: 26px;
  }

  .page-about .about-era::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
  }
}

/* ---------- 06 合作生态 ---------- */

.page-about .about-partner-filter {
  margin-bottom: 8px;
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-partner-card {
  border: 1px solid var(--ember-700);
  background: var(--ember-900);
  padding: 22px 22px 24px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-partner-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyber-500);
  box-shadow: var(--shadow-lift);
}

.page-about .about-partner-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber-400);
}

.page-about .about-partner-card .h-sub {
  margin: 10px 0 8px;
  color: var(--chalk-100);
}

.page-about .about-partner-card p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-partner-more {
  margin: 26px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-partner-more .tag-link {
  color: var(--cyber-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partner-more .tag-link:hover,
.page-about .about-partner-more .tag-link:focus-visible {
  color: var(--flame-400);
}

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

/* ---------- 收束 ---------- */

.page-about .about-cta {
  padding: clamp(46px, 6.5vw, 100px) 0;
  border-top: var(--line);
  background:
    radial-gradient(80% 130% at 100% 0%, rgba(232, 68, 42, 0.28), transparent 62%),
    radial-gradient(70% 100% at 0% 100%, rgba(23, 179, 201, 0.14), transparent 60%),
    var(--ember-900);
}

.page-about .about-cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-cta-copy .kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyber-300);
}

.page-about .about-cta-copy .kicker::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  background: var(--flame-600);
}

.page-about .about-cta-copy .h-section {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--chalk-100);
}

.page-about .about-cta-copy p {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

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

@media (min-width: 860px) {
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-file-card,
  .page-about .about-flow-step,
  .page-about .about-team-card,
  .page-about .about-partner-card,
  .page-about .about-quadrant {
    transition: none;
    transform: none;
  }
}