.page-about {
  --about-rail: 148px;
  --about-pad: clamp(60px, 8vw, 118px);
  background: var(--ink-black);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(56px, 9vw, 118px));
  padding-bottom: clamp(52px, 7vw, 96px);
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(120% 82% at 88% -18%, rgba(182, 255, 60, 0.13), transparent 62%),
    linear-gradient(158deg, #04100b 0%, var(--ink-black) 56%, #020906 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -96px;
  width: clamp(200px, 26vw, 340px);
  height: clamp(200px, 26vw, 340px);
  border: 2px solid var(--line);
  transform: rotate(18deg);
  pointer-events: none;
}

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

.page-about .about-hero__title {
  margin: 24px 0 0;
  max-width: 20ch;
  font-family: var(--font-body);
  font-size: clamp(32px, 6.2vw, 74px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 26px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--archive);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(36px, 5.5vw, 62px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 22px;
  background: var(--panel);
}

.page-about .stat__value--neon {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--neon);
}

.page-about .stat__unit {
  font-size: 0.56em;
  padding-left: 2px;
  color: var(--orange);
}

.page-about .about-hero__stats .stat__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--note);
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding-block: var(--about-pad);
}

.page-about .section-head {
  max-width: 62ch;
  margin-bottom: clamp(32px, 5vw, 62px);
}

.page-about .section-head h2 {
  margin: 14px 0 0;
  font-size: clamp(27px, 4.3vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .section-lede {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--archive);
}

/* ---------- 赛季刻度 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--ink-black) 0%, #050f0b 100%);
}

.page-about .timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .timeline__rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .timeline__year {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 10px 15px;
  border: 2px solid var(--line);
  background: var(--panel);
  color: var(--archive);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .timeline__year:hover,
.page-about .timeline__year:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  background: #0d1b15;
}

.page-about .timeline__marker {
  width: 10px;
  height: 10px;
  background: var(--deep-green);
  border: 2px solid var(--line);
}

.page-about .timeline__year:hover .timeline__marker,
.page-about .timeline__year:focus-visible .timeline__marker {
  background: var(--neon);
  border-color: var(--neon);
}

.page-about .timeline__list {
  display: grid;
  gap: clamp(28px, 6vh, 64px);
}

.page-about .timeline__entry {
  position: relative;
  padding: clamp(24px, 3.2vw, 40px) clamp(20px, 3vw, 40px) clamp(22px, 2.6vw, 34px);
  border: 2px solid var(--line);
  border-left: 6px solid var(--deep-green);
  background: linear-gradient(180deg, rgba(22, 24, 26, 0.94), rgba(7, 20, 16, 0.94));
  box-shadow: var(--shadow-brut);
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-about .timeline__watermark {
  position: absolute;
  top: 6px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: clamp(44px, 8vw, 92px);
  font-weight: 700;
  line-height: 1;
  color: rgba(182, 255, 60, 0.08);
  pointer-events: none;
  user-select: none;
}

.page-about .timeline__title {
  position: relative;
  margin: 14px 0 0;
  font-size: clamp(21px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .timeline__body {
  position: relative;
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--archive);
}

.page-about .timeline__meta {
  position: relative;
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--note);
}

/* ---------- 数据路径 ---------- */
.page-about .about-flow {
  border-block: 2px solid var(--line);
  background: linear-gradient(180deg, var(--ink-black) 0%, #0a1d16 42%, var(--ink-black) 100%);
}

.page-about .flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

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

.page-about .media__frame {
  border: 2px solid var(--line);
  background: repeating-linear-gradient(135deg, rgba(20, 81, 47, 0.55) 0 12px, rgba(14, 59, 42, 0.55) 12px 24px);
  overflow: hidden;
}

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

.page-about .media__cap {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--note);
}

.page-about .flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .flow__step {
  padding: 22px 22px 24px;
  background: var(--panel);
}

.page-about .flow__step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .flow__step-title {
  margin: 10px 0 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .flow__step p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--archive);
}

/* ---------- 编辑团队 ---------- */
.page-about .about-team {
  background: var(--ink-black);
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .team__card {
  padding: clamp(22px, 2.6vw, 34px);
  background: var(--panel);
  border-top: 4px solid var(--deep-green);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .team__card:hover,
.page-about .team__card:focus-within {
  border-top-color: var(--neon);
  background: #1b1e20;
}

.page-about .team__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .team__name {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  color: var(--paper);
}

.page-about .team__desc {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--archive);
}

.page-about .team__more {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.38s ease;
}

.page-about .team__more > div {
  overflow: hidden;
}

.page-about .team__more p {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--note);
}

/* ---------- 版本演进（浅底） ---------- */
.page-about .section--paper {
  background: var(--paper);
  color: var(--ink-black);
}

.page-about .section--paper .section-head h2 {
  color: var(--ink-black);
}

.page-about .section--paper .section-lede {
  color: var(--note-on-paper);
}

.page-about .section--paper .eyebrow {
  color: var(--deep-green);
}

.page-about .ver__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ver__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(22px, 3vw, 34px) 0;
  border-top: 2px solid rgba(7, 20, 16, 0.16);
}

.page-about .ver__item:last-child {
  border-bottom: 2px solid rgba(7, 20, 16, 0.16);
}

.page-about .ver__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 54px;
  border: 2px solid var(--deep-green);
  background: transparent;
  color: var(--deep-green);
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.page-about .ver__item:hover .ver__badge,
.page-about .ver__item:focus-within .ver__badge {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink-black);
}

.page-about .ver__badge--current {
  border-color: var(--ink-black);
  background: var(--ink-black);
  color: var(--neon);
}

.page-about .ver__name {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 800;
  color: var(--ink-black);
}

.page-about .ver__text {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--note-on-paper);
}

.page-about .ver__media {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-about .section--paper .media__frame {
  border-color: rgba(7, 20, 16, 0.28);
  background: repeating-linear-gradient(135deg, rgba(20, 81, 47, 0.16) 0 12px, rgba(20, 81, 47, 0.07) 12px 24px);
}

.page-about .section--paper .media__cap {
  color: var(--note-on-paper);
}

/* ---------- 协作与读者 ---------- */
.page-about .about-eco {
  border-block: 2px solid var(--line);
  background: linear-gradient(145deg, var(--deep-green) 0%, #0a2c1f 58%, var(--pitch-green) 100%);
}

.page-about .eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .eco__item {
  padding: clamp(22px, 2.8vw, 32px);
  border: 2px solid rgba(182, 255, 60, 0.24);
  background: rgba(7, 20, 16, 0.5);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .eco__item:hover {
  border-color: var(--neon);
  background: rgba(7, 20, 16, 0.72);
}

.page-about .eco__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(38px, 5.6vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .eco__unit {
  font-size: 0.46em;
  padding-left: 2px;
  color: var(--orange);
}

.page-about .eco__name {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .eco__text {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--archive);
}

/* ---------- 江苏根基 ---------- */
.page-about .about-jiangsu {
  background: var(--ink-black);
}

.page-about .js__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .js__text p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--archive);
}

.page-about .js__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .js__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .js__facts .num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .js__media {
  border-left: 6px solid var(--deep-green);
  padding-left: 0;
}

/* ---------- 接着往下看 ---------- */
.page-about .about-next {
  border-top: 2px solid var(--line);
  background: linear-gradient(180deg, #04100b 0%, var(--ink-black) 100%);
}

.page-about .next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--panel);
  text-decoration: none;
  color: inherit;
  transition: background 0.22s ease;
}

.page-about .next__link:hover,
.page-about .next__link:focus-visible {
  background: #1b1e20;
}

.page-about .next__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .next__body {
  display: block;
}

.page-about .next__name {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .next__hint {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--note);
}

.page-about .next__link:hover .next__name,
.page-about .next__link:focus-visible .next__name {
  color: var(--neon);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .ver__item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(18px, 2.6vw, 34px);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-about .team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .team__card:nth-child(1) { grid-column: span 7; }
  .page-about .team__card:nth-child(2) { grid-column: span 5; }
  .page-about .team__card:nth-child(3) { grid-column: span 5; }
  .page-about .team__card:nth-child(4) { grid-column: span 7; }

  .page-about .flow__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

  .page-about .js__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 78px);
    align-items: start;
  }

  .page-about .timeline__rail {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 2px solid var(--line);
  }

  .page-about .timeline__year {
    padding: 14px 0 14px 20px;
    border: 0;
    background: none;
    position: relative;
    letter-spacing: 0.16em;
  }

  .page-about .timeline__year:hover,
  .page-about .timeline__year:focus-visible {
    background: none;
    color: var(--neon);
  }

  .page-about .timeline__marker {
    position: absolute;
    left: -7px;
    top: 50%;
    width: 12px;
    height: 12px;
    border: 0;
    background: var(--line);
    transform: translateY(-50%);
    transition: background 0.2s ease, box-shadow 0.2s ease;
  }

  .page-about .timeline__year:hover .timeline__marker,
  .page-about .timeline__year:focus-visible .timeline__marker {
    background: var(--neon);
    box-shadow: 0 0 0 3px rgba(182, 255, 60, 0.2);
  }

  .page-about .timeline__list {
    gap: clamp(52px, 9vh, 104px);
  }

  .page-about .team__more {
    grid-template-rows: 0fr;
  }

  .page-about .team__card:hover .team__more,
  .page-about .team__card:focus-within .team__more {
    grid-template-rows: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__year,
  .page-about .timeline__marker,
  .page-about .team__card,
  .page-about .team__more,
  .page-about .ver__badge,
  .page-about .eco__item,
  .page-about .next__link {
    transition: none;
  }
}