.page-about {
  --about-max: 1180px;
  --about-tint: rgba(53, 224, 208, 0.07);
  background: var(--ink-900);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--about-max);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 var(--gap-5);
  background:
    radial-gradient(130% 90% at 82% 0%, rgba(18, 59, 94, 0.95), rgba(6, 20, 38, 0) 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-tint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-tint) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: var(--gap-4);
  align-items: end;
}

.page-about .about-hero__title {
  font-size: clamp(38px, 8.6vw, 84px);
  font-weight: 800;
  margin: var(--gap-2) 0 var(--gap-3);
}

.page-about .about-hero__title em {
  font-style: normal;
  display: inline-block;
  color: var(--orange-500);
  transform: skewX(-6deg);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0 0 var(--gap-4);
  color: var(--mist);
  font-size: 16px;
}

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

.page-about .about-stat {
  background: var(--ink-700);
  padding: var(--gap-2) var(--gap-2) var(--gap-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-stat__num {
  font-size: clamp(24px, 5.6vw, 36px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.05;
}

.page-about .about-stat__label {
  font-size: 12px;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--panel-500);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  font-size: 11px;
  color: var(--black);
  background: var(--cyan-400);
  letter-spacing: 0.08em;
}

/* ---------- 目录条 ---------- */
.page-about .about-index {
  background: var(--ink-700);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index ul {
  display: flex;
  gap: var(--gap-3);
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index li {
  flex: 0 0 auto;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--mist);
  text-decoration: none;
  font-size: 13px;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}

.page-about .about-index a .mono {
  color: var(--cyan-400);
  font-size: 11px;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--orange-500);
}

/* ---------- 通用分区 ---------- */
.page-about .about-section {
  padding: var(--gap-5) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-section h2 {
  font-size: clamp(26px, 5.4vw, 44px);
  font-weight: 800;
  margin: var(--gap-2) 0 var(--gap-3);
}

.page-about .about-section p {
  margin: 0 0 var(--gap-2);
  color: var(--mist);
}

.page-about .eyebrow {
  color: var(--orange-300);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0;
}

/* ---------- 01 看台出发 ---------- */
.page-about .about-why__grid {
  display: grid;
  gap: var(--gap-4);
}

.page-about .about-note {
  align-self: start;
  background: var(--panel-500);
  border-left: 3px solid var(--orange-500);
  padding: var(--gap-3);
}

.page-about .about-note__title {
  font-size: 18px;
  color: var(--white);
  margin: 0 0 var(--gap-2);
}

.page-about .about-note__list {
  margin: 0 0 var(--gap-2);
  padding: 0;
  list-style: none;
}

.page-about .about-note__list li {
  display: flex;
  gap: var(--gap-2);
  align-items: baseline;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--white);
}

.page-about .about-note__list .mono {
  color: var(--cyan-400);
  font-size: 13px;
  min-width: 48px;
}

.page-about .about-note__foot {
  margin: 0;
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 02 数据能力 ---------- */
.page-about .about-data__head {
  max-width: 68ch;
  margin-bottom: var(--gap-4);
}

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

.page-about .about-data__grid {
  display: grid;
  gap: var(--gap-3);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metrics__item {
  background: var(--ink-700);
  padding: var(--gap-3) var(--gap-2);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-metrics__num {
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 700;
  color: var(--cyan-400);
  line-height: 1;
}

.page-about .about-metrics__label {
  font-size: 12px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-flow {
  background: var(--ink-700);
  border: 1px solid var(--line-strong);
  padding: var(--gap-3);
}

.page-about .about-flow__title {
  font-size: 18px;
  color: var(--white);
  margin: 0 0 var(--gap-2);
}

.page-about .about-flow__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
}

.page-about .about-flow__foot {
  margin: var(--gap-2) 0 0;
  font-size: 13px;
  color: var(--mist);
  border-top: 1px solid var(--line);
  padding-top: var(--gap-2);
}

/* ---------- 03 里程碑 ---------- */
.page-about .about-milestones__figure {
  margin: 0 0 var(--gap-4);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: var(--panel-500);
}

.page-about .about-milestones__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 0 0 var(--gap-3) 8px;
  padding: 0 0 0 28px;
  list-style: none;
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: var(--gap-4);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange-500);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.16);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 14px;
  color: var(--cyan-400);
  margin-bottom: 4px;
}

.page-about .about-timeline__item h3 {
  font-size: 20px;
  color: var(--white);
  margin: 0 0 6px;
}

.page-about .about-timeline__item p {
  font-size: 14px;
  margin: 0;
}

.page-about .about-milestones__foot {
  font-size: 13px;
  color: var(--mist);
  border-top: 1px solid var(--line);
  padding-top: var(--gap-2);
  margin: 0;
}

/* ---------- 04 团队与栏目 ---------- */
.page-about .about-team {
  background: var(--ice);
  color: var(--black);
}

.page-about .about-team h2,
.page-about .about-team h3 {
  color: var(--ink-900);
}

.page-about .about-team p {
  color: rgba(8, 19, 31, 0.74);
}

.page-about .about-team__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #C2470B;
}

.page-about .about-team__head {
  max-width: 70ch;
  margin-bottom: var(--gap-4);
}

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

.page-about .about-roster {
  border-top: 1px solid rgba(8, 19, 31, 0.18);
}

.page-about .about-roster__row {
  display: grid;
  gap: 6px;
  padding: var(--gap-3) 0;
  border-bottom: 1px solid rgba(8, 19, 31, 0.18);
}

.page-about .about-roster__name {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink-900);
  margin: 0;
}

.page-about .about-roster__desc {
  margin: 0;
  font-size: 14px;
}

.page-about .about-columns {
  margin-top: var(--gap-4);
  background: var(--ink-900);
  color: var(--white);
  padding: var(--gap-3);
}

.page-about .about-columns__title {
  font-size: 20px;
  color: var(--white);
  margin: 0 0 var(--gap-2);
}

.page-about .about-columns__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 var(--gap-2);
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-columns__list li {
  background: var(--ink-700);
  padding: var(--gap-2);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-columns__list strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-columns__list span {
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-columns__foot {
  margin: 0 0 var(--gap-3);
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-columns .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  text-decoration: none;
}

/* ---------- 05 球迷生态 ---------- */
.page-about .about-community__head {
  max-width: 68ch;
  margin-bottom: var(--gap-4);
}

.page-about .about-community__grid {
  display: grid;
  gap: var(--gap-3);
}

.page-about .about-partners {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-content: start;
}

.page-about .about-partner {
  background: var(--ink-700);
  padding: var(--gap-3) var(--gap-2);
  display: grid;
  gap: 4px;
  cursor: default;
  outline: none;
  transition: background 180ms ease;
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-visible {
  background: var(--panel-500);
}

.page-about .about-partner:focus-visible {
  box-shadow: inset 0 0 0 1px var(--cyan-400);
}

.page-about .about-partner__num {
  font-size: clamp(26px, 5.6vw, 36px);
  font-weight: 700;
  color: var(--orange-500);
  line-height: 1;
}

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

.page-about .about-partner__more {
  margin: 0;
  font-size: 12.5px;
  color: var(--mist);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 220ms ease, opacity 220ms ease, margin 220ms ease;
}

.page-about .about-partner:hover .about-partner__more,
.page-about .about-partner:focus-visible .about-partner__more {
  max-height: 120px;
  opacity: 1;
  margin-top: 6px;
}

.page-about .about-community__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: var(--panel-500);
}

.page-about .about-community__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-tools {
  margin: var(--gap-4) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-tools li {
  background: var(--ink-700);
  padding: var(--gap-2);
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-tools strong {
  display: block;
  color: var(--white);
  font-size: 15px;
  margin-bottom: 2px;
}

/* ---------- 06 联系 ---------- */
.page-about .about-contact {
  border-bottom: 0;
}

.page-about .about-contact__grid {
  display: grid;
  gap: var(--gap-4);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
  margin-top: var(--gap-3);
}

.page-about .about-contact__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  text-decoration: none;
}

.page-about .about-contact__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-content: start;
}

.page-about .about-contact__item {
  background: var(--ink-700);
  padding: var(--gap-2);
}

.page-about .about-contact__item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange-300);
  margin-bottom: 4px;
}

.page-about .about-contact__item dd {
  margin: 0;
  font-size: 14px;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-contact__item dd a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
}

.page-about .about-contact__item dd a:hover,
.page-about .about-contact__item dd a:focus-visible {
  border-bottom-color: var(--orange-500);
}

.page-about .about-contact__hint {
  margin-top: 4px;
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-wrap {
    padding: 0 32px;
  }

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

  .page-about .about-roster__row {
    grid-template-columns: 180px 1fr;
    gap: var(--gap-3);
    align-items: baseline;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--gap-5);
  }

  .page-about .about-why__grid {
    grid-template-columns: 1.5fr 0.85fr;
    gap: var(--gap-5);
  }

  .page-about .about-data__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--gap-4);
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--gap-3);
    padding: 28px 0 0;
    margin-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .page-about .about-timeline__item::before {
    left: 0;
    top: -34px;
  }

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

  .page-about .about-community__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--gap-4);
    align-items: start;
  }

  .page-about .about-contact__grid {
    grid-template-columns: 1fr 0.9fr;
    gap: var(--gap-5);
  }
}

@media (min-width: 1000px) {
  .page-about .about-index {
    position: sticky;
    top: 0;
    z-index: 20;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-partner__more {
    transition: none;
  }
}