/* ===== 我们是谁 / page-about ===== */

.page-about {
  --about-rail: 168px;
  --about-gap: clamp(32px, 5vw, 76px);
  --about-flow: clamp(64px, 11vw, 140px);
  background: var(--night);
  color: var(--bone);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about :focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 面包屑 ---------- */

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 4vw, 42px);
  padding-bottom: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-faint);
}

.page-about .about-crumbs a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-crumbs a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 总布局：左侧索引 + 右侧叙事流 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
  padding-top: clamp(20px, 4vw, 44px);
  padding-bottom: clamp(72px, 12vw, 160px);
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */

.page-about .about-index {
  position: static;
}

@media (min-width: 1024px) {
  .page-about .about-index {
    position: sticky;
    top: calc(var(--m-head) + 16px);
  }
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--flesh);
}

.page-about .about-index__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__nav::-webkit-scrollbar {
  display: none;
}

@media (min-width: 1024px) {
  .page-about .about-index__nav {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}

@media (min-width: 1024px) {
  .page-about .about-index__item {
    border-radius: 3px;
    padding: 9px 12px;
  }
}

.page-about .about-index__item:hover,
.page-about .about-index__item:focus-visible {
  color: var(--lime);
  border-color: rgba(198, 255, 61, .42);
  background: rgba(198, 255, 61, .07);
}

.page-about .about-index__no {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--emerald);
}

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

@media (min-width: 1024px) {
  .page-about .about-index__ruler {
    display: flex;
    flex-direction: column;
    margin-top: 30px;
    padding-left: 14px;
    border-left: 2px solid var(--flesh);
    opacity: .85;
  }

  .page-about .about-index__ruler span {
    position: relative;
    padding: 8px 0;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--ink-faint);
  }

  .page-about .about-index__ruler span::before {
    content: "";
    position: absolute;
    left: -20px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--night);
    border: 2px solid var(--flesh);
    transform: translateY(-50%);
  }
}

/* ---------- 叙事流 ---------- */

.page-about .about-stream {
  display: flex;
  flex-direction: column;
  gap: var(--about-flow);
  min-width: 0;
}

.page-about .about-block {
  scroll-margin-top: calc(var(--chain-h) + 30px);
  min-width: 0;
}

/* ---------- 通用排版 ---------- */

.page-about .about-eyebrow {
  display: block;
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--flesh);
}

.page-about .about-h1 {
  margin: 0 0 22px;
  font-size: clamp(36px, 7.2vw, 92px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  max-width: 15ch;
}

.page-about .about-h1__hl {
  color: var(--lime);
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 58ch;
}

.page-about .about-kicker {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--emerald);
}

.page-about .about-title {
  position: relative;
  margin: 0 0 20px;
  padding-top: 18px;
  font-size: clamp(25px, 3.4vw, 42px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--bone);
}

.page-about .about-title::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--emerald);
}

.page-about .about-p {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 64ch;
}

.page-about .about-p:last-child {
  margin-bottom: 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(28px, 5vw, 52px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.78fr);
  }
}

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

.page-about .about-hero__media {
  aspect-ratio: 4 / 5;
  border-radius: 3px 40px 3px 40px;
  background: var(--slate);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
  opacity: .9;
}

.page-about .media__caption {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ink-faint);
}

/* ---------- 首屏数字碎片 ---------- */

.page-about .about-facts {
  list-style: none;
  margin: clamp(32px, 5vw, 58px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (min-width: 900px) {
  .page-about .about-facts {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .page-about .about-facts > li:nth-child(1) { grid-column: span 4; }
  .page-about .about-facts > li:nth-child(2) { grid-column: span 3; transform: translateY(20px); }
  .page-about .about-facts > li:nth-child(3) { grid-column: span 3; }
  .page-about .about-facts > li:nth-child(4) { grid-column: span 2; transform: translateY(34px); }
}

.page-about .about-facts .frag {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(31, 191, 122, .09);
  border-left: 2px solid var(--emerald);
}

.page-about .about-facts__num {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--bone);
}

.page-about .about-facts__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-faint);
}

/* ---------- 团队分工：不规则有机色块 ---------- */

.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(26px, 4vw, 44px);
}

@media (min-width: 780px) {
  .page-about .about-crew {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-crew__item--a { grid-column: 1 / span 4; }
  .page-about .about-crew__item--b { grid-column: 5 / span 2; }
  .page-about .about-crew__item--c { grid-column: 1 / span 2; }
  .page-about .about-crew__item--d { grid-column: 3 / span 4; }
}

.page-about .about-crew__item {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid rgba(74, 83, 89, .34);
}

.page-about .about-crew__item--a {
  background: linear-gradient(140deg, rgba(31, 191, 122, .17), rgba(31, 191, 122, .03));
  border-radius: 3px 44px 3px 44px;
}

.page-about .about-crew__item--b {
  background: linear-gradient(140deg, rgba(198, 255, 61, .12), rgba(198, 255, 61, .02));
  border-radius: 44px 3px 44px 3px;
}

.page-about .about-crew__item--c {
  background: var(--slate);
  border-radius: 3px 3px 44px 3px;
}

.page-about .about-crew__item--d {
  background: linear-gradient(140deg, rgba(124, 227, 174, .12), rgba(36, 42, 46, .55));
  border-radius: 44px 44px 3px 44px;
}

.page-about .about-crew__meta {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--lime);
}

.page-about .about-crew__name {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 数据来源表 ---------- */

.page-about .about-spec {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-spec__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 820px) {
  .page-about .about-spec__row {
    grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
    padding: 24px 0;
  }
}

.page-about .about-spec__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--emerald);
}

.page-about .about-spec__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 62ch;
}

/* ---------- 引句呼吸带 ---------- */

.page-about .about-block--quote {
  padding: clamp(6px, 1vw, 14px) 0;
}

.page-about .about-quote {
  position: relative;
  margin: 0;
  padding: clamp(30px, 5vw, 56px) clamp(20px, 4vw, 48px) clamp(30px, 5vw, 56px) clamp(52px, 8vw, 100px);
  background: linear-gradient(118deg, rgba(31, 191, 122, .13), rgba(23, 26, 28, 0) 66%);
  border-radius: 4px 52px 4px 4px;
}

.page-about .about-quote::before {
  content: "\201C";
  position: absolute;
  left: clamp(12px, 2.4vw, 26px);
  top: clamp(10px, 1.6vw, 20px);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(52px, 7vw, 84px);
  line-height: 1;
  color: var(--lime);
  opacity: .5;
}

.page-about .about-quote__text {
  margin: 0;
  font-size: clamp(18px, 2.3vw, 27px);
  font-weight: 700;
  line-height: 1.62;
  color: var(--bone);
  max-width: 32ch;
}

/* ---------- 版本时间线 ---------- */

.page-about .about-timeline__bg {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border-radius: 3px 40px 3px 40px;
  overflow: hidden;
  opacity: .34;
  background: var(--slate);
}

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

.page-about .about-timeline {
  position: relative;
  margin-top: clamp(28px, 4vw, 46px);
  padding-left: 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--flesh), rgba(124, 227, 174, .12));
}

.page-about .about-node {
  position: relative;
  border-top: 1px solid var(--hair);
}

.page-about .about-node:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--flesh);
}

.page-about .about-node__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-about .about-node__head::marker {
  content: "";
}

.page-about .about-node__head:hover .about-node__title {
  color: var(--lime);
}

.page-about .about-node__ver {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--emerald);
}

.page-about .about-node__title {
  flex: 1 1 200px;
  font-size: 16px;
  font-weight: 700;
  color: var(--bone);
  transition: color .2s var(--ease);
}

.page-about .about-node__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-faint);
}

.page-about .about-node__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-node[open] .about-node__head::after {
  content: "\2212";
}

.page-about .about-node__body {
  padding: 0 0 22px;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(24px, 4vw, 42px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
  }
}

.page-about .about-partners__media {
  margin: 0;
  border-radius: 52px 3px 52px 3px;
  overflow: hidden;
  background: var(--slate);
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .88;
}

.page-about .about-forms {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 22px;
  padding: 0;
}

.page-about .about-forms .tag {
  padding: 6px 12px;
  border: 1px solid rgba(31, 191, 122, .5);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--flesh);
}

/* ---------- 结尾入口 ---------- */

.page-about .about-cta {
  padding-top: clamp(6px, 1.4vw, 18px);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    transform: none !important;
  }
}
</main>