.page-about {
  --about-line: #22304F;
  --about-rail: 132px;
  --about-edge: rgba(123, 92, 255, 0.16);
  background: var(--ink);
  color: var(--white);
  padding-bottom: 64px;
  overflow-x: hidden;
}

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

.page-about .about-crumbs {
  padding-top: 20px;
  padding-bottom: 4px;
}

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

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 20px 0 48px;
  background:
    radial-gradient(760px 360px at 84% -18%, rgba(123, 92, 255, 0.32), transparent 62%),
    radial-gradient(620px 340px at 4% 108%, rgba(40, 224, 200, 0.14), transparent 64%),
    var(--ink);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: auto -25% -120px 38%;
  height: 200px;
  background: linear-gradient(90deg, transparent, rgba(123, 92, 255, 0.34), rgba(40, 224, 200, 0.12), transparent);
  transform: rotate(-7deg);
  filter: blur(30px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__lead .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  max-width: 16ch;
  color: var(--white);
}

.page-about .about-hero__intro {
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 56ch;
  margin: 0 0 26px;
}

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

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  box-shadow: 0 24px 60px -30px rgba(5, 7, 15, 0.9);
}

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

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  position: relative;
  padding: 48px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-chapter--tint {
  background: linear-gradient(180deg, var(--ink-2), var(--ink) 88%);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 4px;
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-rail__word {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mute);
  margin: 0;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.005em;
  margin: 0 0 16px;
  color: var(--white);
}

.page-about .about-chapter__lead {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 62ch;
  margin: 0 0 30px;
}

.page-about .about-note {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mute);
  max-width: 62ch;
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--about-line);
}

.page-about .about-inline {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 224, 200, 0.4);
}

.page-about .about-inline:hover,
.page-about .about-inline:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-about .about-tail {
  font-size: 14px;
  line-height: 1.9;
  color: var(--silver);
  margin: 30px 0 0;
}

/* ---------- 时间轴 ---------- */

.page-about .phases {
  position: relative;
  padding-left: 26px;
}

.page-about .phases::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 58%, transparent);
  opacity: 0.8;
}

.page-about .phase {
  position: relative;
  border-bottom: 1px solid var(--about-line);
}

.page-about .phase:last-child {
  border-bottom: 0;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 22px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--violet);
}

.page-about .phase[open]::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(40, 224, 200, 0.14);
}

.page-about .phase__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .phase__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-about .phase__year {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .phase__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .phase__mark {
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--mute);
  transition: color 180ms var(--ease);
}

.page-about .phase__mark::before {
  content: "+";
}

.page-about .phase[open] .phase__mark::before {
  content: "−";
}

.page-about .phase[open] .phase__mark {
  color: var(--orange);
}

.page-about .phase__body {
  padding: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 62ch;
}

.page-about .about-figure {
  margin: 30px 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--about-line);
}

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

/* ---------- 业务线 ---------- */

.page-about .lines {
  display: grid;
  gap: 10px;
}

.page-about .line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  padding: 18px 18px 18px 16px;
  border-radius: var(--r-md);
  border-left: 3px solid var(--violet);
  background: linear-gradient(100deg, rgba(123, 92, 255, 0.16), rgba(17, 28, 54, 0.55) 62%);
  transition: background 200ms var(--ease), transform 200ms var(--ease), border-color 180ms var(--ease);
}

.page-about .line__idx {
  grid-row: span 3;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mute);
  letter-spacing: 0.1em;
}

.page-about .line__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 0;
  color: var(--white);
}

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

.page-about .line__link {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .line__link:hover,
.page-about .line__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

.page-about .line--data {
  border-left-color: var(--cyan);
  background: linear-gradient(100deg, rgba(40, 224, 200, 0.14), rgba(17, 28, 54, 0.55) 62%);
}

.page-about .line--play {
  border-left-color: var(--orange);
  background: linear-gradient(100deg, rgba(255, 122, 26, 0.14), rgba(17, 28, 54, 0.55) 62%);
}

.page-about .line--brand {
  border-left-color: var(--violet);
  background: linear-gradient(100deg, rgba(123, 92, 255, 0.22), rgba(17, 28, 54, 0.55) 68%);
}

@media (hover: hover) {
  .page-about .line:hover {
    transform: translateX(4px);
    border-left-color: var(--white);
  }
}

/* ---------- 能力与团队 ---------- */

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .stat {
  background: var(--ink-2);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .stat__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mute);
}

.page-about .team-view {
  margin-top: 28px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  padding: 16px;
  background: rgba(17, 28, 54, 0.5);
}

.page-about .team-view__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .team-view__tab {
  display: inline-block;
  padding: 7px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-line);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .team-view__tab:hover,
.page-about .team-view__tab:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  background: rgba(40, 224, 200, 0.1);
}

.page-about .team-panel {
  display: block;
}

.page-about .team-view:has(.team-panel:target) .team-panel {
  display: none;
}

.page-about .team-view .team-panel:target {
  display: block;
}

.page-about .team-panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  margin: 0 0 8px;
  color: var(--cyan);
}

.page-about .team-panel p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 约球网络 ---------- */

.page-about .play-grid {
  display: grid;
  gap: 24px;
}

.page-about .play-copy__sub {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 14px;
  color: var(--white);
}

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

.page-about .play-list li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .play-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .play-list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  line-height: 1.9;
}

.page-about .play-grid .about-figure {
  margin: 0;
}

/* ---------- 合作方式 ---------- */

.page-about .ways {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .way {
  background: var(--ink);
  padding: 20px 4px 20px 16px;
  border-left: 2px solid transparent;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .way:hover {
  border-left-color: var(--violet);
  background: rgba(123, 92, 255, 0.06);
}

.page-about .way__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--white);
}

.page-about .way__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
  margin: 0;
  max-width: 58ch;
}

/* ---------- 运营原则 ---------- */

.page-about .rules {
  display: grid;
  gap: 0;
}

.page-about .rule-row {
  padding: 18px 0;
  border-top: 1px solid var(--about-line);
}

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

.page-about .rule-row__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  margin: 0 0 8px;
  color: var(--cyan);
}

.page-about .rule-row p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
  margin: 0;
  max-width: 62ch;
}

.page-about .about-contact {
  margin-top: 30px;
  padding: 22px 18px;
  border-radius: var(--r-md);
  background: linear-gradient(120deg, rgba(123, 92, 255, 0.2), rgba(11, 18, 36, 0.9) 70%);
  border: 1px solid var(--about-line);
}

.page-about .about-contact__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  margin: 0 0 14px;
  color: var(--white);
}

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

.page-about .about-contact__list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
  word-break: break-word;
}

.page-about .about-contact__list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-about .about-contact__list a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid rgba(237, 241, 255, 0.28);
}

.page-about .about-contact__list a:hover,
.page-about .about-contact__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .stat {
    padding: 22px 20px;
  }

  .page-about .about-contact {
    padding: 26px 24px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 88px;
  }

  .page-about .about-hero {
    padding: 34px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: 44px;
  }

  .page-about .about-hero__figure {
    align-self: stretch;
  }

  .page-about .about-hero__figure img {
    min-height: 340px;
  }

  .page-about .play-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 36px;
  }

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

  .page-about .rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-chapter {
    padding: 68px 0;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    display: block;
    align-self: start;
    padding: 4px 0 4px 16px;
    border-left: 2px solid var(--about-line);
  }

  .page-about .about-rail__num {
    font-size: 30px;
  }

  .page-about .about-rail__word {
    margin-top: 10px;
  }

  .page-about .lines {
    gap: 12px;
  }

  .page-about .line--data {
    width: 94%;
  }

  .page-about .line--play {
    width: 88%;
  }

  .page-about .line--brand {
    width: 82%;
  }

  .page-about .line {
    padding: 22px 22px 22px 18px;
  }

  .page-about .about-contact {
    padding: 30px 28px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-chapter__grid {
    gap: 56px;
  }

  .page-about .about-chapter__lead {
    font-size: 16px;
  }

  .page-about .phase__title {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .line,
  .page-about .way,
  .page-about .phase__mark,
  .page-about .team-view__tab {
    transition: none;
  }
}