.page-about {
  --about-hair: rgba(43, 245, 200, 0.22);
  --about-gap: clamp(0.9rem, 2.2vw, 1.4rem);
  display: block;
  overflow-x: clip;
  color: var(--cream);
  background:
    radial-gradient(1100px 620px at 88% -10%, rgba(43, 245, 200, 0.10), transparent 62%),
    radial-gradient(820px 520px at 4% 26%, rgba(14, 42, 34, 0.88), transparent 64%),
    linear-gradient(180deg, #0B1220 0%, #0E2A22 48%, #0B1220 100%);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(1.1rem, 3.6vw, 2rem);
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
}
.page-about .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
}
.page-about .breadcrumbs__link:hover,
.page-about .breadcrumbs__link:focus-visible {
  color: var(--cyan);
}
.page-about .breadcrumbs__sep {
  color: var(--line);
}
.page-about .breadcrumbs__current {
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(1.2rem, 3.6vw, 2.2rem) 0;
}
.page-about .about-hero__shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}
.page-about .about-hero__lead .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-hero__title {
  margin: 0.7rem 0 0;
  font-size: clamp(1.85rem, 5.6vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}
.page-about .about-hero__intro {
  margin: 1rem 0 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.35rem;
}

.page-about .about-hero__tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .about-tile {
  padding: 1.05rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
}
.page-about .about-tile .card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--mist);
}
.page-about .about-tile__num {
  margin: 0.45rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 2.5rem);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.page-about .about-tile__text {
  margin: 0.5rem 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-hero__media {
  margin: clamp(1.4rem, 4vw, 2.4rem) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}
.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media__caption {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--mist);
  background: rgba(5, 7, 12, 0.55);
}

/* ---------- 通用小节 ---------- */
.page-about .about-section {
  padding-block: clamp(2.2rem, 5.5vw, 3.6rem);
}
.page-about .about-head {
  max-width: 64ch;
  margin-bottom: clamp(1.2rem, 3vw, 1.9rem);
}
.page-about .about-head .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 0.55rem;
}
.page-about .about-head h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3.6vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 800;
}
.page-about .about-head p {
  margin: 0.7rem 0 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 时间轴 + 侧栏 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.3rem, 3vw, 2rem);
}
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0.25rem 1.9rem;
  border-left: 1px solid var(--line);
}
.page-about .tl__item {
  position: relative;
  padding-bottom: 1.6rem;
  outline: none;
}
.page-about .tl__item:last-child {
  padding-bottom: 0;
}
.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -1.9rem;
  top: 0.5rem;
  width: 11px;
  height: 11px;
  margin-left: -6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 245, 200, 0.12);
  transition: box-shadow var(--speed) var(--ease), background var(--speed) var(--ease);
}
.page-about .tl__item:is(:hover, :focus-within)::before {
  background: var(--lime);
  box-shadow: 0 0 0 7px rgba(203, 242, 75, 0.18);
}
.page-about .tl__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
  border-radius: var(--radius-sm);
}
.page-about .tl__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--lime);
}
.page-about .tl__title {
  margin: 0.32rem 0 0;
  font-size: clamp(1rem, 2.3vw, 1.2rem);
  line-height: 1.4;
  font-weight: 700;
}
.page-about .tl__text {
  margin: 0.42rem 0 0;
  max-width: 56ch;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
}
.page-about .tl__note {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--cyan);
  transition: max-height 0.22s var(--ease), opacity 0.22s var(--ease), margin-top 0.22s var(--ease);
}
.page-about .tl__item:is(:hover, :focus-within) .tl__note {
  max-height: 9rem;
  opacity: 1;
  margin-top: 0.55rem;
}

.page-about .about-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .about-side__card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
}
.page-about .about-side__card .card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--mist);
  margin-bottom: 0.5rem;
}
.page-about .about-side__card .card__title {
  margin: 0 0 0.8rem;
  font-size: 1rem;
  line-height: 1.45;
  font-weight: 700;
}
.page-about .mini-facts {
  margin: 0;
  display: grid;
  gap: 0.5rem;
}
.page-about .mini-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--line);
}
.page-about .mini-facts__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .mini-facts dt {
  font-size: 0.82rem;
  color: var(--mist);
}
.page-about .mini-facts dd {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .about-side__quote {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--cream);
  border-left: 2px solid var(--cyan);
  padding-left: 0.85rem;
}

/* ---------- 团队 ---------- */
.page-about .about-pillbar {
  margin-bottom: 1.1rem;
}
.page-about .about-team__media {
  margin: 0 0 1.1rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .team-card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
  outline: none;
}
.page-about .team-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-about .team-card .card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--lime);
  margin-bottom: 0.5rem;
}
.page-about .team-card .card__title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  line-height: 1.45;
  font-weight: 700;
}
.page-about .team-card .card__body {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--mist);
}
.page-about .team-card__list {
  list-style: none;
  margin: 0.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}
.page-about .team-card__list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--cream);
}
.page-about .team-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 赛季步骤 ---------- */
.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}
.page-about .steps__item {
  position: relative;
  padding: 1rem 1.05rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 42, 51, 0.85), rgba(11, 18, 32, 0.75));
}
.page-about .steps__item::after {
  content: "";
  position: absolute;
  left: 1.05rem;
  bottom: 0;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.6;
}
.page-about .steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--lime);
}
.page-about .steps__title {
  margin: 0.4rem 0 0.45rem;
  font-size: 0.95rem;
  line-height: 1.4;
  font-weight: 700;
}
.page-about .steps__text {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-season__media {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .partner-card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
}
.page-about .partner-card .card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}
.page-about .partner-card .card__title {
  margin: 0 0 0.55rem;
  font-size: 1rem;
  line-height: 1.45;
  font-weight: 700;
}
.page-about .partner-card .card__body {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--mist);
}
.page-about .partner-card__foot {
  margin: 0.85rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--lime);
}
.page-about .partner-card__num {
  margin: 0.2rem 0 0.4rem;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 8vw, 3rem);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .partner-card__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 用户分布 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
.page-about .reach-bars {
  display: grid;
  gap: 0.85rem;
}
.page-about .bars__row {
  display: grid;
  grid-template-columns: 5.4rem 1fr;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: border-color var(--speed) var(--ease), background var(--speed) var(--ease);
}
.page-about .bars__row:hover,
.page-about .bars__row:focus-within {
  border-color: var(--about-hair);
  background: rgba(16, 42, 51, 0.6);
}
.page-about .bars__label {
  font-size: 0.84rem;
  color: var(--cream);
}
.page-about .bars__track {
  display: block;
  height: 10px;
  border-radius: var(--pill);
  background: rgba(28, 68, 56, 0.55);
  overflow: hidden;
}
.page-about .bars__fill {
  display: block;
  height: 100%;
  border-radius: var(--pill);
  background: linear-gradient(90deg, #1B8F7A, var(--cyan));
}
.page-about .bars__value {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color var(--speed) var(--ease);
}
.page-about .bars__row:hover .bars__value,
.page-about .bars__row:focus-within .bars__value {
  color: var(--cyan);
}

.page-about .reach-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}
.page-about .reach-stat {
  padding: 0.85rem 0.7rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(16, 42, 51, 0.72);
  text-align: left;
}
.page-about .reach-stat .stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.4vw, 1.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan);
}
.page-about .reach-stat .stat__label {
  margin: 0.35rem 0 0;
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--mist);
}
.page-about .reach-note {
  margin: clamp(1.1rem, 3vw, 1.6rem) 0 0;
  padding: 0.9rem 1.05rem;
  border-radius: var(--radius-md);
  border-left: 2px solid var(--lime);
  background: rgba(5, 7, 12, 0.5);
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--cream);
}

/* ---------- 认可与下一步 ---------- */
.page-about .ahead-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .ahead-card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
}
.page-about .ahead-card .card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--lime);
  margin-bottom: 0.5rem;
}
.page-about .ahead-card .card__title {
  margin: 0 0 0.55rem;
  font-size: 1rem;
  line-height: 1.45;
  font-weight: 700;
}
.page-about .ahead-card .card__body {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--mist);
}
.page-about .ahead-card--next {
  border: 1px solid rgba(43, 245, 200, 0.35);
}
.page-about .ahead-card__foot {
  margin: 0.9rem 0 0;
}

/* ---------- 继续了解 ---------- */
.page-about .about-more {
  padding-bottom: clamp(2.6rem, 6vw, 4.2rem);
}
.page-about .about-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
.page-about .about-link {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(16, 42, 51, 0.6);
  text-decoration: none;
  color: var(--cream);
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  outline: none;
}
.page-about .about-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-about .about-link__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-about .about-link__text {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-tile--wide {
    grid-column: span 2;
  }
  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ahead-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ahead-card--next {
    grid-column: span 2;
  }
  .page-about .reach-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__shell {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
    gap: clamp(1.6rem, 3.4vw, 3rem);
  }
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .reach-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 1.6rem;
  }
  .page-about .reach-stats {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1080px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ahead-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ahead-card--next {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-link:hover,
  .page-about .about-link:focus-visible {
    transform: none;
  }
  .page-about .tl__note {
    transition: none;
  }
}