.page-about {
  --about-line: rgba(217, 210, 195, .2);
  --about-ink-soft: rgba(35, 26, 18, .74);
  --about-paper-card: rgba(255, 255, 255, .58);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 52px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(31, 90, 69, .9), transparent 62%),
    var(--pitch);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(217, 210, 195, .05) 0 1px, transparent 1px 4px);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

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

.page-about .about-hero__frame {
  border: 1px solid var(--about-line);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .8);
}

.page-about .about-hero__stamp {
  margin: 12px 0 0;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--yellow);
  border: 1px solid rgba(242, 201, 76, .45);
  border-radius: 999px;
  padding: 5px 12px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  color: var(--white);
  text-transform: none;
  line-height: .96;
  letter-spacing: -.02em;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 46ch;
  color: rgba(255, 255, 255, .86);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  border-top: 1px solid var(--about-line);
  padding-top: 20px;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  letter-spacing: -.03em;
}

.page-about .about-hero__plus {
  font-size: .5em;
  margin-left: 2px;
  color: var(--mist);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-story {
  background: var(--pitch-deep);
  border-top: 1px solid var(--about-line);
}

.page-about .about-story__rail {
  align-self: start;
}

.page-about .about-story__title {
  margin: 12px 0 0;
  color: var(--white);
  line-height: 1.1;
}

.page-about .about-story__text {
  margin-top: 16px;
  color: rgba(255, 255, 255, .8);
  max-width: 34ch;
}

.page-about .about-story__rail .meta-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--about-line);
  color: var(--mist);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--about-line);
  margin-left: 4px;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 38px) clamp(18px, 3vw, 30px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 4px rgba(242, 201, 76, .16);
}

.page-about .timeline__item:last-child::before {
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, .24);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--yellow);
}

.page-about .timeline__body h3 {
  margin: 8px 0 0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--white);
  line-height: 1.3;
}

.page-about .timeline__body p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, .76);
  font-size: 15px;
  line-height: 1.7;
  max-width: 56ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
}

.page-about .about-team__title {
  margin: 12px 0 0;
  color: var(--ink);
  line-height: 1.08;
  max-width: 18ch;
}

.page-about .about-team__lede {
  margin-top: 16px;
  max-width: 52ch;
  color: var(--about-ink-soft);
  line-height: 1.7;
}

.page-about .about-team__figure {
  border: 1px solid rgba(35, 26, 18, .18);
  box-shadow: 0 18px 40px -26px rgba(35, 26, 18, .55);
}

.page-about .about-team__filter {
  margin: clamp(24px, 3.4vw, 36px) 0 clamp(18px, 2.6vw, 26px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team__filter .filter-btn {
  color: var(--ink);
  border-color: rgba(35, 26, 18, .3);
  background: transparent;
}

.page-about .about-team__filter .filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .role-card {
  position: relative;
  padding: 20px 20px 18px;
  background: var(--about-paper-card);
  border: 1px solid rgba(35, 26, 18, .2);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--red);
}

.page-about .role-card:nth-child(2n)::before {
  background: var(--yellow);
}

.page-about .role-card:nth-child(3n)::before {
  background: var(--sky);
}

.page-about .role-card__count {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink);
}

.page-about .role-card h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-about .role-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .role-card .meta-note {
  margin-top: auto;
  color: rgba(35, 26, 18, .5);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  background: var(--pitch);
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-flow__title {
  margin: 12px 0 0;
  color: var(--white);
  line-height: 1.1;
  max-width: 16ch;
}

.page-about .about-flow__lead p {
  margin-top: 16px;
  color: rgba(255, 255, 255, .8);
  max-width: 44ch;
}

.page-about .about-flow__figure {
  margin-top: 24px;
  border: 1px solid var(--about-line);
}

.page-about .flow-tickets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 16px);
  align-content: start;
}

.page-about .ticket {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px 18px 20px;
  background: var(--pitch-2);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  border-left: 3px solid var(--yellow);
}

.page-about .ticket:last-child {
  border-left-color: var(--red);
}

.page-about .ticket::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 62px;
  border-left: 1px dashed rgba(217, 210, 195, .22);
}

.page-about .ticket__no {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  letter-spacing: -.02em;
}

.page-about .ticket__body {
  padding-left: 14px;
}

.page-about .ticket__body h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--white);
}

.page-about .ticket__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .78);
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage {
  background: var(--pitch-deep);
  border-top: 1px solid var(--about-line);
}

.page-about .about-coverage__head {
  max-width: 40ch;
}

.page-about .about-coverage__title {
  margin: 12px 0 0;
  color: var(--white);
  line-height: 1.1;
}

.page-about .league-chips {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .league-chips li {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--paper);
  background: rgba(31, 90, 69, .75);
  border: 1px solid rgba(242, 201, 76, .3);
}

.page-about .coverage-stats {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .coverage-stat {
  background: var(--pitch-deep);
  padding: 20px 16px 22px;
}

.page-about .coverage-stat .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
  letter-spacing: -.03em;
}

.page-about .coverage-stat__unit {
  font-size: .52em;
  color: var(--yellow);
  margin-left: 2px;
}

.page-about .coverage-stat .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-coverage__note {
  margin-top: 22px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .78);
  max-width: 62ch;
}

.page-about .about-coverage__note a {
  color: var(--yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作 ---------- */
.page-about .about-partners__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-partners__title {
  margin: 12px 0 0;
  color: var(--ink);
  line-height: 1.1;
  max-width: 14ch;
}

.page-about .about-partners__lead p {
  margin-top: 16px;
  color: var(--about-ink-soft);
  max-width: 42ch;
  line-height: 1.75;
}

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

.page-about .partner-item {
  padding: 20px 0;
  border-top: 1px solid rgba(35, 26, 18, .18);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  row-gap: 6px;
  align-items: baseline;
}

.page-about .partner-item:last-child {
  border-bottom: 1px solid rgba(35, 26, 18, .18);
}

.page-about .partner-item__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--red);
  line-height: 1;
}

.page-about .partner-item h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--ink);
}

.page-about .partner-item p {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-ink-soft);
  max-width: 56ch;
}

/* ---------- 服务 ---------- */
.page-about .about-service {
  background:
    linear-gradient(180deg, rgba(11, 61, 46, 1) 0%, rgba(8, 46, 34, 1) 100%);
  border-top: 1px solid var(--about-line);
}

.page-about .about-service__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .about-service__title {
  margin: 12px 0 0;
  color: var(--white);
  line-height: 1.1;
  max-width: 16ch;
}

.page-about .about-service__copy p {
  margin-top: 16px;
  color: rgba(255, 255, 255, .8);
  max-width: 46ch;
  line-height: 1.75;
}

.page-about .about-service__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .service-facts {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .service-fact {
  background: var(--pitch-2);
  padding: 16px 18px;
}

.page-about .service-fact dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .service-fact dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-service__more {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-service__more a {
  color: var(--sky);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 渐显 ---------- */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}

.js .page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 4fr 7fr;
    align-items: center;
  }

  .page-about .about-story__grid {
    align-items: start;
  }

  .page-about .about-team__head {
    grid-template-columns: 6fr 5fr;
  }

  .page-about .about-flow__inner {
    grid-template-columns: 5fr 6fr;
    align-items: start;
  }

  .page-about .ticket::after {
    left: 74px;
  }

  .page-about .about-partners__inner {
    grid-template-columns: 4fr 7fr;
    align-items: start;
  }

  .page-about .about-service__inner {
    grid-template-columns: 6fr 5fr;
    align-items: start;
  }

  .page-about .about-service__more {
    grid-column: 1 / -1;
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid var(--about-line);
    max-width: 72ch;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</main>