.page-about {
  overflow-x: clip;
  background: var(--void);
  color: var(--white);
}

.page-about .about-crumb {
  padding: clamp(20px, 4vw, 32px) 0 0;
}

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

.page-about .about-crumb .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.26;
  font-weight: 900;
  letter-spacing: -.01em;
  margin: 10px 0 0;
  color: var(--white);
}

.page-about .about-p {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--steel);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-p a,
.page-about .about-lines__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-p a:hover,
.page-about .about-lines__foot a:hover {
  color: var(--lime);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 44px) 0 clamp(38px, 6vw, 74px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 82% 6%, rgba(34, 245, 227, .16), transparent 68%),
    radial-gradient(46% 42% at 4% 0%, rgba(167, 123, 255, .14), transparent 70%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.4vw, 54px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--white);
  background: linear-gradient(98deg, var(--white) 34%, var(--cyan) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--steel);
}

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

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(28, 51, 80, .8);
  border: 1px solid rgba(28, 51, 80, .95);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: linear-gradient(160deg, rgba(13, 23, 40, .97), rgba(7, 10, 18, .97));
}

.page-about .about-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 29px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-stat:nth-child(2) .about-stat__value { color: var(--violet); }
.page-about .about-stat:nth-child(3) .about-stat__value { color: var(--lime); }
.page-about .about-stat:nth-child(4) .about-stat__value { color: var(--orange); }

.page-about .about-stat__label {
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--steel);
}

/* ---------- 通用图片框 ---------- */

.page-about .about-frame {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(28, 51, 80, .95);
  background: linear-gradient(150deg, rgba(34, 245, 227, .12), rgba(13, 23, 40, .92) 58%);
}

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

.page-about .about-frame__cap {
  padding: 11px 18px;
  border-top: 1px solid rgba(145, 167, 196, .18);
  background: rgba(7, 10, 18, .74);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
}

/* ---------- 赛区起点 ---------- */

.page-about .about-origin {
  padding: clamp(42px, 7vw, 84px) 0;
  border-top: 1px solid rgba(145, 167, 196, .18);
  background: linear-gradient(180deg, rgba(13, 23, 40, .72), transparent 62%);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 58%, rgba(28, 51, 80, .15));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 245, 227, .12);
}

.page-about .about-timeline__item:nth-child(even)::before {
  border-color: var(--violet);
  box-shadow: 0 0 0 4px rgba(167, 123, 255, .12);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .about-timeline__item:nth-child(even) .about-timeline__year {
  color: var(--violet);
}

.page-about .about-timeline h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--white);
}

.page-about .about-timeline p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 六地观赛网络 ---------- */

.page-about .about-hub {
  overflow: clip;
  padding: clamp(42px, 7vw, 84px) 0;
  border-top: 1px solid rgba(28, 51, 80, .95);
  border-bottom: 1px solid rgba(28, 51, 80, .95);
  background:
    linear-gradient(180deg, rgba(13, 23, 40, .96), rgba(13, 23, 40, .7)),
    repeating-linear-gradient(0deg, rgba(28, 51, 80, .5) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(28, 51, 80, .5) 0 1px, transparent 1px 64px);
}

.page-about .about-hub__head {
  max-width: 66ch;
}

.page-about .about-hub__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
  margin-top: clamp(24px, 3.5vw, 38px);
}

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

.page-about .about-hub__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "city cap"
    "note note";
  gap: 6px 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(28, 51, 80, .95);
  background: rgba(7, 10, 18, .68);
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.page-about .about-hub__item:hover {
  background: rgba(34, 245, 227, .09);
  border-color: rgba(34, 245, 227, .5);
  transform: translateX(3px);
}

.page-about .about-hub__city {
  grid-area: city;
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-hub__dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(183, 255, 90, .16);
}

.page-about .about-hub__cap {
  grid-area: cap;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-hub__note {
  grid-area: note;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 团队与岗位 ---------- */

.page-about .about-team {
  padding: clamp(42px, 7vw, 84px) 0;
}

.page-about .about-team__head {
  max-width: 66ch;
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 44px);
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  position: relative;
  padding: 18px 20px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(28, 51, 80, .95);
  background: linear-gradient(152deg, rgba(13, 23, 40, .97), rgba(7, 10, 18, .92));
}

.page-about .about-role::after {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--violet);
}

.page-about .about-role__id {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--violet);
}

.page-about .about-role h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--white);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 三条内容线 ---------- */

.page-about .about-lines {
  padding: clamp(42px, 7vw, 84px) 0;
  border-top: 1px solid rgba(145, 167, 196, .18);
}

.page-about .about-lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 22px;
  border-radius: 0 var(--radius-lg) var(--radius-lg) var(--radius-lg);
  border: 1px solid rgba(28, 51, 80, .95);
  background: linear-gradient(158deg, rgba(13, 23, 40, .98), rgba(7, 10, 18, .98));
  text-decoration: none;
  color: var(--white);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.page-about .about-line:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 245, 227, .55);
  box-shadow: 0 20px 44px -26px rgba(34, 245, 227, .8);
}

.page-about .about-line__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .about-line h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-line p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-line__go {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-lines__foot {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 合作与荣誉 ---------- */

.page-about .about-partners {
  padding: clamp(42px, 7vw, 84px) 0;
  background: linear-gradient(200deg, rgba(167, 123, 255, .12), rgba(13, 23, 40, .96) 46%, rgba(7, 10, 18, .98));
  border-top: 1px solid rgba(28, 51, 80, .95);
}

.page-about .about-partners__head {
  max-width: 66ch;
}

.page-about .about-partner__stats {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  border: 1px solid rgba(28, 51, 80, .95);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(28, 51, 80, .8);
}

.page-about .about-partner__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: rgba(7, 10, 18, .94);
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-partner__stats li:nth-child(2) .about-partner__num { color: var(--violet); }
.page-about .about-partner__stats li:nth-child(3) .about-partner__num { color: var(--orange); }

.page-about .about-partner__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-awards {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-awards li {
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  background: var(--reverse);
  color: var(--void);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

/* ---------- 到访与联系 ---------- */

.page-about .about-visit {
  padding: clamp(42px, 7vw, 84px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-visit__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(22px, 4vw, 44px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(34, 245, 227, .32);
  background:
    radial-gradient(70% 90% at 100% 0%, rgba(167, 123, 255, .2), transparent 66%),
    linear-gradient(160deg, rgba(13, 23, 40, .98), rgba(7, 10, 18, .98));
}

.page-about .about-steps {
  list-style: none;
  counter-reset: about-step;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-steps li {
  counter-increment: about-step;
  position: relative;
  padding-left: 40px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--white);
}

.page-about .about-steps li::before {
  content: counter(about-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(34, 245, 227, .45);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

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

.page-about .about-contact {
  padding: 22px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(28, 51, 80, .95);
  background: rgba(7, 10, 18, .68);
}

.page-about .about-contact h3 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-contact dl {
  margin: 0;
  display: grid;
  gap: 13px;
}

.page-about .about-contact dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--steel);
}

.page-about .about-contact dd {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-about .about-contact__mail {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--cyan);
}

.page-about .about-contact__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(145, 167, 196, .18);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }

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

  .page-about .about-hero h1 {
    transform: skewX(-2.5deg);
    transform-origin: left bottom;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-hub__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }

  .page-about .about-role:nth-child(even) {
    margin-left: clamp(18px, 4vw, 52px);
  }

  .page-about .about-role:nth-child(odd) {
    margin-right: clamp(10px, 2vw, 22px);
  }

  .page-about .about-visit__panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .about-lines__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-hub__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 48px;
  }
}

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

  .page-about .about-hub__item:hover,
  .page-about .about-line:hover {
    transform: none;
  }

  .page-about .about-hero h1 {
    transform: none;
  }
}