.page-about {
  --about-hair: rgba(233, 241, 248, 0.1);
  --about-ring: rgba(43, 232, 176, 0.22);
  --about-breath: rgba(43, 232, 176, 0.12);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  font-size: 13px;
  color: var(--text-400);
}

.page-about .breadcrumb a {
  color: var(--text-400);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--neon-500);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-100);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 96px;
  padding-bottom: 32px;
}

.page-about .about-hero__grid {
  max-width: 780px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 700;
  font-style: italic;
  letter-spacing: -0.01em;
  line-height: 1.12;
  color: var(--text-100);
}

.page-about .about-hero .lede {
  margin-top: 22px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  margin: 44px 0 0;
  padding: 24px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--neon-500);
}

.page-about .about-stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-400);
}

/* ---------- 通用章节小标题 ---------- */
.page-about .about-head {
  max-width: 720px;
}

.page-about .about-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text-100);
}

.page-about .about-head__sub {
  margin-top: 16px;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-400);
}

.page-about .about-head--tight {
  max-width: 640px;
}

/* ---------- 历程时间轴 ---------- */
.page-about .about-trail {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-tl {
  position: relative;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon-500) 0%, rgba(43, 232, 176, 0.45) 55%, rgba(43, 232, 176, 0) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 38px;
  padding-bottom: 26px;
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--neon-500);
  box-shadow: 0 0 0 5px var(--about-breath);
}

.page-about .about-tl__node {
  padding: 18px 20px;
  background: var(--ink-700);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-m);
  transition: border-color 200ms var(--ease);
}

.page-about .about-tl__node[open] {
  border-color: rgba(43, 232, 176, 0.35);
}

.page-about .about-tl__node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__node summary:focus-visible {
  outline: 2px solid var(--neon-500);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--neon-500);
}

.page-about .about-tl__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-100);
}

.page-about .about-tl__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: var(--text-400);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 44px 0 0;
}

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

/* ---------- 编辑团队 ---------- */
.page-about .about-team {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-split {
  display: grid;
  gap: 32px;
}

.page-about .about-split__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text-100);
}

.page-about .about-split .prose {
  margin-top: 18px;
}

.page-about .about-split .prose p {
  margin: 0 0 16px;
  max-width: 720px;
  font-size: var(--fs-body);
  line-height: 1.72;
  color: var(--text-400);
}

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

.page-about .about-split__media {
  margin: 0;
}

.page-about .about-split__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 暖橙短注释 ---------- */
.page-about .about-note {
  position: relative;
  margin: 40px 0 0;
  padding: 24px 24px 24px 58px;
  background: rgba(255, 138, 61, 0.07);
  border-left: 3px solid var(--amber-500);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-about .about-note::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 4px;
  font-family: var(--font-display);
  font-size: 54px;
  line-height: 1;
  color: var(--amber-500);
  opacity: 0.6;
}

.page-about .about-note p {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-100);
}

/* ---------- 客服团队 ---------- */
.page-about .about-care {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-care__panel {
  padding: 32px 24px;
  background: linear-gradient(150deg, var(--ink-700) 0%, var(--ink-800) 68%);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-l);
}

.page-about .about-care__list {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-about .about-care__list li {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--about-hair);
}

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

.page-about .about-care__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--neon-500);
}

.page-about .about-care__val {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-100);
}

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

/* ---------- 赛事覆盖 ---------- */
.page-about .about-cover {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-cover__grid {
  display: grid;
  gap: 36px;
  margin-top: 44px;
}

.page-about .about-map__wrap {
  display: flex;
  justify-content: center;
}

.page-about .about-map {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
}

.page-about .about-map__num {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 500;
  fill: var(--text-100);
}

.page-about .about-map__cap {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--text-400);
}

.page-about .about-map__dot {
  transition: stroke 180ms var(--ease), stroke-width 180ms var(--ease);
}

.page-about .about-map__dot:hover {
  stroke: var(--ice-050);
  stroke-width: 2.5;
}

.page-about .about-legend {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 20px;
  align-content: center;
}

.page-about .about-legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-bottom: 10px;
  font-size: 15px;
  color: var(--text-100);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-legend__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-500);
}

.page-about .about-legend__dot--amber {
  background: var(--amber-500);
}

/* ---------- 数据来源 ---------- */
.page-about .about-data {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-metrics {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-metrics li {
  padding: 20px 18px;
  background: var(--ink-700);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-m);
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--neon-500);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-400);
}

/* ---------- 夜间模式 ---------- */
.page-about .about-night {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-night__panel {
  position: relative;
  max-width: 900px;
  padding: 34px 24px 34px 26px;
  overflow: hidden;
  background: var(--ink-900);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-l);
}

.page-about .about-night__panel::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(43, 232, 176, 0.22), rgba(43, 232, 176, 0) 70%);
  pointer-events: none;
}

.page-about .about-night__panel h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text-100);
}

.page-about .about-night__panel .prose p {
  margin: 18px 0 0;
  max-width: 720px;
  font-size: var(--fs-body);
  line-height: 1.72;
  color: var(--text-400);
}

/* ---------- 团队所在地 ---------- */
.page-about .about-city {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about .about-city__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-city__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text-100);
}

.page-about .about-city__text > p {
  margin: 18px 0 0;
  max-width: 640px;
  font-size: var(--fs-body);
  line-height: 1.72;
  color: var(--text-400);
}

.page-about .about-city__contact {
  display: grid;
  gap: 10px;
  margin: 26px 0;
  font-style: normal;
}

.page-about .about-city__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  font-size: 15px;
  color: var(--text-100);
}

.page-about .about-city__key {
  flex: none;
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-400);
}

.page-about .about-city__contact a {
  color: var(--text-100);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 176, 0.4);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-city__contact a:hover,
.page-about .about-city__contact a:focus-visible {
  color: var(--neon-500);
  border-color: var(--neon-500);
}

.page-about .about-city__tag {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-top: 40px;
  padding-bottom: 96px;
}

.page-about .about-cta__panel {
  padding: 32px 24px;
  background: linear-gradient(120deg, rgba(43, 232, 176, 0.14) 0%, rgba(43, 232, 176, 0.02) 46%, rgba(11, 27, 43, 0) 100%);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-l);
}

.page-about .about-cta__panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text-100);
}

.page-about .about-cta__panel p {
  margin: 16px 0 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-400);
}

.page-about .about-cta__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-care__panel {
    padding: 40px 36px;
  }

  .page-about .about-night__panel {
    padding: 44px 40px 44px 42px;
  }

  .page-about .about-cta__panel {
    padding: 44px 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 120px;
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-split--flip .about-split__text {
    order: 1;
  }

  .page-about .about-split--flip .about-metrics {
    order: 0;
  }

  .page-about .about-city__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-city__tag {
    justify-content: flex-end;
  }

  .page-about .about-care__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-about .about-care__list li {
    border-bottom: 0;
    border-top: 2px solid var(--about-hair);
    padding: 18px 0 0;
  }

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

@media (min-width: 1200px) {
  .page-about .about-tl__item {
    padding-left: 46px;
  }

  .page-about .about-tl::before {
    left: 8px;
  }

  .page-about .about-map {
    max-width: 420px;
  }

  .page-about .about-tl {
    max-width: 860px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__node,
  .page-about .about-map__dot,
  .page-about .about-city__contact a,
  .page-about .breadcrumb a {
    transition: none;
  }
}