.page-about {
  --about-pad: clamp(2.4rem, 6vw, 5rem);
  --about-dark-text: #3a556e;
  background: var(--abyss);
  color: var(--mist);
  overflow-x: clip;
}

.page-about h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  font-weight: 800;
  max-width: 26ch;
}

.page-about h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  line-height: 1.4;
  font-weight: 700;
}

.page-about p {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(1rem, 2.6vw, 1.8rem) var(--about-pad);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -28%;
  right: -16%;
  width: min(760px, 96vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(43, 224, 200, 0.16), rgba(110, 123, 255, 0.1) 44%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__title {
  margin: 0.6rem 0 0;
  font-size: clamp(2rem, 6.4vw, 4.3rem);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.03em;
  max-width: 17ch;
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--cyan);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  margin-top: clamp(1.4rem, 4vw, 2.4rem);
}

.page-about .about-hero__lead {
  display: grid;
  gap: 0.9rem;
  max-width: 56ch;
  font-size: clamp(0.96rem, 1.6vw, 1.04rem);
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--midnight);
  overflow: hidden;
}

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

.page-about .about-figure--hero {
  box-shadow: 10px 10px 0 rgba(43, 224, 200, 0.08);
}

.page-about .about-figure--band {
  margin-top: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-about .about-figure__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.42rem 0.8rem;
  background: var(--lava);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__stats > div {
  background: var(--midnight);
  padding: 0.9rem 1rem;
}

.page-about .about-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-about .about-hero__stats dd {
  margin: 0.3rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.2vw, 1.85rem);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--midnight);
  padding-block: var(--about-pad);
  border-block: 1px solid var(--line-soft);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: clamp(1.4rem, 4vw, 2.2rem) 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 1.3rem 0 1.3rem 1.9rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-timeline__item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.72rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--abyss);
  border: 2px solid var(--cyan-deep);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 2.5rem;
  bottom: -0.1rem;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item:last-child::after {
  display: none;
}

.page-about .about-timeline__item:hover::before {
  border-color: var(--lava);
  box-shadow: 0 0 0 4px rgba(255, 106, 42, 0.16);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}

.page-about .about-timeline__body p {
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--steel);
  max-width: 62ch;
}

/* ---------- 使命 ---------- */
.page-about .about-mission {
  background: var(--mist);
  color: var(--ink);
  padding-block: var(--about-pad);
}

.page-about .about-mission .section-head__title {
  color: var(--ink);
}

.page-about .about-mission .section-head__index {
  color: var(--cyan-deep);
}

.page-about .about-mission .section-head__rule {
  background: var(--cyan-deep);
}

.page-about .about-mission__grid {
  display: grid;
  gap: clamp(0.8rem, 2vw, 1.2rem);
  margin-top: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-about .about-mission__cell {
  background: #ffffff;
  border: 1px solid rgba(6, 26, 46, 0.1);
  border-top: 3px solid var(--cyan-deep);
  padding: clamp(1rem, 2.6vw, 1.6rem);
  box-shadow: 5px 5px 0 rgba(6, 26, 46, 0.05);
}

.page-about .about-mission__cell h3 {
  color: var(--ink);
}

.page-about .about-mission__cell p {
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--about-dark-text);
}

.page-about .about-mission__quote {
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  padding: clamp(1.2rem, 3.5vw, 2rem) clamp(1.2rem, 3.5vw, 2.2rem);
  background: var(--mist-cyan);
  border-left: 4px solid var(--lava);
  box-shadow: 8px 8px 0 rgba(6, 26, 46, 0.06);
}

.page-about .about-mission__quote p {
  font-size: clamp(1.02rem, 2.3vw, 1.35rem);
  font-weight: 700;
  line-height: 1.62;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .about-mission__quote footer {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--cyan-deep);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--about-pad);
}

.page-about .about-team__wrap {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  margin-top: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-figure--tall img {
  aspect-ratio: 10 / 7;
}

.page-about .about-team__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-team__cell {
  background: var(--midnight);
  padding: clamp(1rem, 2.6vw, 1.5rem);
  transition: background 0.25s var(--ease);
}

.page-about .about-team__cell:hover {
  background: #0e3157;
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--lava);
}

.page-about .about-team__cell p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 合作网络 ---------- */
.page-about .about-network {
  background: var(--midnight);
  border-block: 1px solid var(--line-soft);
  padding-block: var(--about-pad);
}

.page-about .about-network__lead {
  max-width: 66ch;
  margin-top: clamp(1rem, 3vw, 1.6rem);
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-network__map {
  margin-top: clamp(1.4rem, 3.5vw, 2.2rem);
  padding: clamp(1.1rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 0%, rgba(43, 224, 200, 0.13), transparent 62%),
    var(--abyss);
}

.page-about .about-network__hub {
  display: grid;
  justify-items: center;
  gap: 0.18rem;
  width: fit-content;
  margin: 0 auto clamp(1rem, 3vw, 1.6rem);
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  text-align: center;
}

.page-about .about-network__hub strong {
  font-size: 0.92rem;
  letter-spacing: 0.06em;
}

.page-about .about-network__hub span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-about .about-network__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-about .about-network__node {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--line-soft);
  background: rgba(6, 26, 46, 0.75);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-network__node:hover {
  border-color: var(--lava);
  transform: translateY(-2px);
}

.page-about .about-network__type {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--steel);
  transition: color 0.25s var(--ease);
}

.page-about .about-network__node:hover .about-network__type {
  color: var(--lava);
}

.page-about .about-network__node strong {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--mist);
}

/* ---------- 赛季方法 ---------- */
.page-about .about-method {
  padding-block: var(--about-pad);
}

.page-about .about-method__list {
  margin-top: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-method__row {
  display: grid;
  gap: 0.4rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-method__row:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-method__key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-method__name {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-method__desc {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 成果 ---------- */
.page-about .about-result {
  background: var(--midnight);
  border-block: 1px solid var(--line-soft);
  padding-block: var(--about-pad);
}

.page-about .about-result__lead {
  max-width: 64ch;
  margin-top: clamp(1rem, 3vw, 1.6rem);
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-result__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin-top: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-about .about-result__cell {
  background: var(--abyss);
  padding: clamp(1rem, 2.6vw, 1.6rem);
}

.page-about .about-result__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.8vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-result__num--lava {
  color: var(--lava);
}

.page-about .about-result__cap {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 合作邀请 ---------- */
.page-about .about-cta {
  padding-block: var(--about-pad);
}

.page-about .about-cta__panel {
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(43, 224, 200, 0.13), rgba(110, 123, 255, 0.1) 52%, rgba(255, 106, 42, 0.14));
}

.page-about .about-cta__title {
  margin-top: 0.5rem;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-cta__text {
  max-width: 60ch;
  margin-top: 0.9rem;
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--steel);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

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

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

@media (min-width: 820px) {
  .page-about .about-mission__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-method__row {
    grid-template-columns: 5.5rem 10rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.4rem;
  }

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

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-team__wrap {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 1.4rem;
    padding-left: 2.2rem;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    padding-top: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-network__node,
  .page-about .about-network__type,
  .page-about .about-team__cell {
    transition: none;
  }

  .page-about .about-network__node:hover {
    transform: none;
  }

  .page-about .about-hero__title em {
    transform: none;
  }
}