.page-about {
  --about-mark: 96px;
  background: var(--paper);
  color: var(--ink-text);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  color: var(--ink-900);
}

.page-about h2 {
  font-size: clamp(23px, 3.6vw, 34px);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.28;
  margin: 0 0 14px;
}

.page-about p {
  margin: 0 0 14px;
  font-size: 15.5px;
}

.page-about .about-body {
  padding-block: clamp(8px, 2vw, 18px) clamp(36px, 5vw, 64px);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.page-about .about-eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--orange-600);
  display: inline-block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(32px, 5.5vw, 62px);
  background: linear-gradient(155deg, #0B1B2B 0%, #12314A 56%, #0F5566 100%);
  color: var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(31, 191, 208, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 191, 208, 0.1) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.75;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .about-eyebrow {
  color: var(--teal-400);
}

.page-about .about-hero h1 {
  color: var(--paper);
  font-size: clamp(29px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.03em;
  margin: 0 0 16px;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.6vw, 17.5px);
  color: rgba(245, 246, 242, 0.82);
  max-width: 34em;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 24px 0 18px;
  background: rgba(31, 191, 208, 0.24);
  border: 1px solid rgba(31, 191, 208, 0.24);
}

.page-about .about-stats__item {
  background: rgba(11, 27, 43, 0.68);
  padding: 13px 12px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.3vw, 25px);
  letter-spacing: 0.02em;
  color: var(--paper);
  line-height: 1.2;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(245, 246, 242, 0.64);
  line-height: 1.5;
}

.page-about .about-hero__status {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: rgba(245, 246, 242, 0.72);
  margin: 0;
}

.page-about .about-hero__status strong {
  color: var(--lime-400);
  font-weight: 400;
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid rgba(31, 191, 208, 0.38);
  border-radius: var(--radius);
}

.page-about .about-hero__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(245, 246, 242, 0.58);
}

/* ---------- 纵向行与左侧刻度 ---------- */
.page-about .about-row {
  display: grid;
  gap: 14px;
  padding-block: clamp(28px, 4.4vw, 52px);
  border-top: 1px solid var(--line);
}

.page-about .about-row:first-child {
  border-top: none;
}

.page-about .about-row__mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal-700);
}

.page-about .about-row__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: none;
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  color: var(--ink-900);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-row__body > p {
  max-width: 620px;
}

/* ---------- 团队叠层纸卡 ---------- */
.page-about .about-stack {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-card {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: 16px 16px 14px;
  box-shadow: 5px 5px 0 rgba(18, 112, 126, 0.1), 10px 10px 0 rgba(18, 112, 126, 0.05);
}

.page-about .about-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.2;
  color: var(--teal-700);
  margin-bottom: 6px;
}

.page-about .about-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.page-about .about-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 六道工序横向带 ---------- */
.page-about .about-flow {
  position: relative;
  overflow: hidden;
  margin-block: clamp(14px, 3vw, 28px);
  padding-block: clamp(30px, 5vw, 52px);
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .about-flow__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-flow__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
}

.page-about .about-flow::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.94) 0%, rgba(11, 27, 43, 0.86) 62%, rgba(18, 49, 74, 0.92) 100%);
}

.page-about .about-flow__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-flow .about-eyebrow {
  color: var(--teal-400);
}

.page-about .about-flow h2 {
  color: var(--paper);
}

.page-about .about-flow__lead {
  color: rgba(245, 246, 242, 0.76);
  max-width: 40em;
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  background: rgba(31, 191, 208, 0.28);
  border: 1px solid rgba(31, 191, 208, 0.28);
}

.page-about .about-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 13px;
  background: var(--ink-900);
  transition: background 200ms var(--ease);
}

.page-about .about-step:hover {
  background: #10283c;
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-600);
}

.page-about .about-step__name {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-about .about-step__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(245, 246, 242, 0.66);
}

/* ---------- 交锋数据 ---------- */
.page-about .about-dims {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-dims li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 16px;
  background: var(--paper);
}

.page-about .about-dims__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--teal-700);
  padding-top: 2px;
}

.page-about .about-dims h3 {
  margin: 0 0 5px;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-dims p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-figure {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin: 0 0 18px;
}

.page-about .about-figure__item {
  border-top: 2px solid var(--teal-700);
  padding-top: 10px;
}

.page-about .about-figure__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--ink-900);
  line-height: 1.2;
}

.page-about .about-figure__txt {
  display: block;
  margin-top: 4px;
  font-size: 13px;
}

.page-about .about-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--teal-700);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--orange-600);
  border-color: var(--orange-300);
}

/* ---------- 六个赛事带 ---------- */
.page-about .about-bands {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-bands li {
  background: var(--paper);
  padding: 16px;
}

.page-about .about-band__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--orange-600);
}

.page-about .about-bands h3 {
  margin: 5px 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.page-about .about-bands p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 高原栏目 ---------- */
.page-about .about-plateau__figure {
  margin: 0 0 18px;
}

.page-about .about-plateau__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.page-about .about-plateau__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--teal-700);
}

.page-about .about-plateau__cols {
  display: grid;
  gap: 16px;
  margin: 0 0 18px;
}

.page-about .about-plateau__cols > div {
  border-left: 2px solid var(--teal-700);
  padding-left: 13px;
}

.page-about .about-plateau__cols h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.page-about .about-plateau__cols p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.page-about .chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink-900);
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .chip:hover {
  border-color: var(--orange-300);
  color: var(--orange-600);
}

.page-about .chip[aria-pressed="true"] {
  background: var(--orange-600);
  border-color: var(--orange-600);
  color: #ffffff;
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-partner {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: 16px;
}

.page-about .about-partner__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal-700);
}

.page-about .about-partner h3 {
  margin: 6px 0 6px;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-partner p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

.page-about .is-filtered-out {
  display: none;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 44px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: var(--line-strong);
}

.page-about .about-timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0 10px 0;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: 40px;
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange-600);
  border: 2px solid var(--paper);
  box-sizing: content-box;
}

.page-about .about-timeline li:last-child::before {
  background: var(--lime-400);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  line-height: 1.6;
}

.page-about .about-timeline__event {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-timeline li p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 5vw, 56px);
  background: linear-gradient(140deg, #12314A 0%, #12707E 58%, #0B1B2B 100%);
  color: var(--paper);
}

.page-about .about-cta h2 {
  color: var(--paper);
  margin-bottom: 12px;
}

.page-about .about-cta p {
  color: rgba(245, 246, 242, 0.82);
  max-width: 42em;
}

.page-about .about-cta p a {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.5);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-cta__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 246, 242, 0.5);
  padding-bottom: 2px;
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

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

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

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .page-about .about-row {
    grid-template-columns: var(--about-mark) minmax(0, 1fr);
    column-gap: clamp(20px, 3.4vw, 44px);
  }

  .page-about .about-row__mark {
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding-top: 6px;
    border-right: 1px solid var(--line);
    padding-right: 14px;
  }

  .page-about .about-row__label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.34em;
  }
}

@media (min-width: 1040px) {
  .page-about .about-flow__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .chip,
  .page-about .about-step,
  .page-about .about-link {
    transition: none;
  }
}