/* ===========================================================
   赛场档案 / about —— 页面专属样式（作用域 .page-about）
   =========================================================== */

.page-about {
  --about-rail-x: 8px;
  --about-rail-pad: 30px;
  background: var(--emc-ink);
  color: var(--emc-white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 46px) 0 clamp(38px, 7vw, 82px);
  background:
    radial-gradient(110% 82% at 88% -12%, rgba(43, 231, 200, .16), transparent 62%),
    radial-gradient(90% 70% at 2% 112%, rgba(138, 107, 255, .13), transparent 60%),
    linear-gradient(180deg, var(--emc-deep) 0%, var(--emc-ink) 74%);
  border-bottom: 1px solid var(--emc-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--emc-cyan) 0%, var(--emc-orange) 56%, var(--emc-violet) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(233, 242, 239, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 242, 239, .05) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .78), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .78), transparent 72%);
}

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

.page-about .about-hero__eyebrow {
  display: block;
  margin: 20px 0 0;
  color: var(--emc-cyan);
  letter-spacing: .14em;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--emc-font-head);
  font-weight: 800;
  font-size: clamp(32px, 6.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--emc-white);
  max-width: 22em;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.78;
  color: rgba(233, 242, 239, .82);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4.6vw, 44px);
  background: var(--emc-line);
  border: 1px solid var(--emc-line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: rgba(11, 31, 26, .82);
}

.page-about .about-stat__num {
  font-family: var(--emc-font-mono);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--emc-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(233, 242, 239, .62);
}

/* ---------- 章节与时间轴 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(44px, 7.2vw, 88px) 0;
}

.page-about .about-chapter--band {
  background: linear-gradient(180deg, rgba(22, 48, 42, .58) 0%, rgba(11, 31, 26, 0) 100%);
  border-top: 1px solid var(--emc-line-soft);
  border-bottom: 1px solid var(--emc-line-soft);
}

.page-about .about-spine {
  position: relative;
  padding-left: var(--about-rail-pad);
}

.page-about .about-spine::before {
  content: "";
  position: absolute;
  left: var(--about-rail-x);
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, rgba(43, 231, 200, .62) 0%, rgba(43, 231, 200, .24) 46%, rgba(43, 231, 200, 0) 100%);
}

.page-about .about-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin: 0 0 20px;
}

.page-about .about-head::before {
  content: "";
  position: absolute;
  left: -28px;
  top: .5em;
  width: 12px;
  height: 12px;
  background: var(--emc-ink);
  border: 2px solid var(--emc-cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 2px rgba(43, 231, 200, .14);
}

.page-about .about-head__no {
  flex: 0 0 auto;
  font-family: var(--emc-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--emc-cyan);
  border: 1px solid var(--emc-line-strong);
  padding: 3px 9px;
  line-height: 1.2;
}

.page-about .about-head__title {
  flex: 1 1 300px;
  margin: 0;
  font-family: var(--emc-font-head);
  font-weight: 800;
  font-size: clamp(23px, 3.9vw, 38px);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--emc-white);
}

.page-about .emc-prose {
  max-width: 38em;
  color: rgba(233, 242, 239, .84);
}

.page-about .emc-prose + .emc-prose {
  margin-top: 16px;
}

/* ---------- 三件高频事：暖纸错落卡片 ---------- */
.page-about .about-focus {
  display: grid;
  gap: 16px;
  margin-top: 30px;
  padding-bottom: 4px;
}

.page-about .about-focus__item {
  padding: 20px 18px 22px;
  background: var(--emc-paper);
  color: var(--emc-ink-text);
  border-top: 3px solid var(--emc-orange);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: background var(--emc-t-base) var(--emc-ease);
}

.page-about .about-focus__item:hover {
  background: #FFF7EA;
}

.page-about .about-focus__k {
  display: inline-block;
  font-family: var(--emc-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--emc-ink-text);
  border-bottom: 2px solid var(--emc-orange);
  padding-bottom: 3px;
}

.page-about .about-focus__t {
  margin: 14px 0 8px;
  font-family: var(--emc-font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--emc-ink-text);
}

.page-about .about-focus__d {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(11, 27, 23, .76);
}

/* ---------- 数据链路 ---------- */
.page-about .about-source {
  margin-top: 26px;
  align-items: start;
}

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

.page-about .about-chain__item {
  background: var(--emc-paper);
  color: var(--emc-ink-text);
  border-left: 3px solid var(--emc-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-chain__item[open] {
  border-left-color: var(--emc-orange);
}

.page-about .about-chain__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-chain__head::-webkit-details-marker {
  display: none;
}

.page-about .about-chain__head:focus-visible {
  outline: 2px solid var(--emc-orange);
  outline-offset: -3px;
}

.page-about .about-chain__idx {
  font-family: var(--emc-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--emc-orange);
}

.page-about .about-chain__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .about-chain__time {
  margin-left: auto;
  font-family: var(--emc-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(11, 27, 23, .6);
  white-space: nowrap;
}

.page-about .about-chain__text {
  margin: 0;
  padding: 0 18px 16px 42px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 27, 23, .78);
}

.page-about .about-source__fig {
  margin: 24px 0 0;
}

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

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-version {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(158deg, rgba(22, 48, 42, .92) 0%, rgba(17, 20, 23, .94) 100%);
  border: 1px solid var(--emc-line);
  border-top-width: 3px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: transform var(--emc-t-base) var(--emc-ease), border-color var(--emc-t-base) var(--emc-ease);
}

.page-about .about-version:hover,
.page-about .about-version:focus-within {
  transform: translateY(-4px);
  border-color: var(--emc-line-strong);
}

.page-about .about-version--cyan { border-top-color: var(--emc-cyan); }
.page-about .about-version--violet { border-top-color: var(--emc-violet); }
.page-about .about-version--gold { border-top-color: var(--emc-gold); }
.page-about .about-version--orange { border-top-color: var(--emc-orange); }

.page-about .about-version__year {
  display: block;
  font-family: var(--emc-font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--emc-white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-version--cyan .about-version__year { color: var(--emc-cyan); }
.page-about .about-version--violet .about-version__year { color: var(--emc-violet); }
.page-about .about-version--gold .about-version__year { color: var(--emc-gold); }
.page-about .about-version--orange .about-version__year { color: var(--emc-orange); }

.page-about .about-version__name {
  margin: 10px 0 8px;
  font-family: var(--emc-font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--emc-white);
}

.page-about .about-version__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: rgba(233, 242, 239, .72);
}

.page-about .about-arc {
  margin: 34px 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--emc-line);
}

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

.page-about .about-team__no {
  font-family: var(--emc-font-mono);
  font-size: 19px;
  font-weight: 700;
  color: var(--emc-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__name {
  margin: 0 0 7px;
  font-family: var(--emc-font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--emc-white);
}

.page-about .about-team__name span {
  margin-left: 10px;
  font-family: var(--emc-font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--emc-cyan);
}

.page-about .about-team__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(233, 242, 239, .76);
}

.page-about .about-collab {
  margin: 32px 0 0;
}

/* ---------- 合作与认可 ---------- */
.page-about .about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 26px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-next__card {
  display: block;
  padding: 18px 16px 20px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(155deg, rgba(22, 48, 42, .88) 0%, rgba(17, 20, 23, .92) 100%);
  border: 1px solid var(--emc-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: transform var(--emc-t-base) var(--emc-ease), border-color var(--emc-t-base) var(--emc-ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--emc-line-strong);
}

.page-about .about-next__card:focus-visible {
  outline: 2px solid var(--emc-orange);
  outline-offset: 2px;
}

.page-about .about-next__k {
  display: inline-block;
  font-family: var(--emc-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--emc-cyan);
}

.page-about .about-next__t {
  margin: 12px 0 8px;
  font-family: var(--emc-font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--emc-white);
}

.page-about .about-next__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: rgba(233, 242, 239, .72);
}

.page-about .about-next__cta {
  margin: 30px 0 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 560px) {
  .page-about {
    --about-rail-x: 5px;
    --about-rail-pad: 24px;
  }

  .page-about .about-head::before {
    left: -23px;
    width: 10px;
    height: 10px;
  }

  .page-about .about-chain__text {
    padding-left: 18px;
  }

  .page-about .about-chain__time {
    display: none;
  }
}

@media (min-width: 720px) {
  .page-about .about-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about {
    --about-rail-x: 10px;
    --about-rail-pad: 40px;
  }

  .page-about .about-head::before {
    left: -38px;
  }

  .page-about .about-focus {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-bottom: 44px;
  }

  .page-about .about-focus > :nth-child(2) {
    transform: translateY(18px);
  }

  .page-about .about-focus > :nth-child(3) {
    transform: translateY(36px);
  }

  .page-about .about-source {
    margin-top: 30px;
  }

  .page-about .about-team__row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
    padding: 24px 0;
  }
}

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

@media (min-width: 1180px) {
  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__lede {
    max-width: 42em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-version,
  .page-about .about-next__card,
  .page-about .about-focus__item {
    transition-duration: 1ms;
    transform: none;
  }
}
</final_css>