.page-about {
  --about-rail: 208px;
  --about-measure: 720px;
  --about-flow-gap: 48px;
  --about-paper-line: rgba(26, 22, 19, 0.16);

  background: var(--ink-900);
  color: var(--text);
}

/* ---------- 卷首 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 16, 24, 0.62) 0%, rgba(11, 16, 24, 0.88) 58%, var(--ink-900) 100%),
    radial-gradient(760px 320px at 10% 6%, rgba(53, 224, 214, 0.24), transparent 66%),
    radial-gradient(620px 300px at 92% 0%, rgba(140, 107, 255, 0.22), transparent 70%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 28px;
  padding-bottom: 44px;
}

.page-about .about-hero__crumb {
  margin-bottom: 26px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  margin: 0 0 28px;
  max-width: 17ch;
  color: var(--text-strong);
  font-size: clamp(30px, 7.2vw, 58px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .about-hero__panel {
  position: relative;
  max-width: 760px;
  padding: 24px 22px 22px;
  background: var(--paper);
  color: var(--paper-ink);
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--orange);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.42);
  transform: rotate(-0.35deg);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper-ink);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px dashed var(--about-paper-line);
  list-style: none;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.page-about .about-hero__fact-num {
  color: var(--paper-ink);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.1;
}

.page-about .about-hero__fact-label {
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(26, 22, 19, 0.62);
}

/* ---------- 主体框架 ---------- */

.page-about .about-body {
  padding-top: 40px;
  padding-bottom: 64px;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

/* ---------- 左侧索引 ---------- */

.page-about .about-rail {
  padding: 16px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-700);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.3;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--cyan);
  color: var(--text-strong);
  transform: translateY(-2px);
}

.page-about .about-rail__num {
  color: var(--cyan);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

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

/* ---------- 正文流 ---------- */

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .about-quote {
  position: relative;
  margin: 0 0 40px;
  padding: 26px 22px 22px;
  background: var(--paper);
  color: var(--paper-ink);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.38);
  transform: rotate(0.4deg);
}

.page-about .about-quote__mark {
  position: absolute;
  top: 4px;
  left: 12px;
  font-size: 54px;
  line-height: 1;
  color: rgba(255, 90, 60, 0.28);
  pointer-events: none;
}

.page-about .about-quote__text {
  position: relative;
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--paper-ink);
}

.page-about .about-quote__by {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-paper-line);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: rgba(26, 22, 19, 0.6);
}

/* ---------- 章节 ---------- */

.page-about .about-section {
  position: relative;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.page-about .about-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-section__num {
  display: block;
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.page-about .about-section__title {
  margin: 0 0 22px;
  max-width: 22ch;
  color: var(--text-strong);
  font-size: clamp(23px, 5.4vw, 34px);
  font-weight: 900;
  line-height: 1.22;
}

.page-about .about-section p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text);
}

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

/* ---------- 01 关键行 ---------- */

.page-about .about-keyline {
  margin: 28px 0 0;
  padding: 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .about-keyline__item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 7px 0;
}

.page-about .about-keyline__item + .about-keyline__item {
  border-top: 1px dashed var(--line);
}

.page-about .about-keyline__key {
  min-width: 44px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-keyline__val {
  font-size: 14.5px;
  color: var(--text-strong);
}

/* ---------- 02 标准 ---------- */

.page-about .about-rules {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-rule__idx {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(53, 224, 214, 0.5);
  border-radius: 50%;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
}

.page-about .about-rule__title {
  margin: 3px 0 8px;
  color: var(--text-strong);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-rule__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
}

/* ---------- 03 赛区 ---------- */

.page-about .about-zones {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.page-about .about-zones__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 18px 0 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--line);
  list-style: none;
  font-size: 13.5px;
  color: var(--text-dim);
}

.page-about .about-zones__list li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .about-zones__swatch {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.page-about .about-zones__swatch[data-tone="orange"] {
  background: var(--orange);
}

.page-about .about-zones__swatch[data-tone="yellow"] {
  background: var(--yellow);
}

.page-about .about-zones__swatch[data-tone="cyan"] {
  background: var(--cyan);
}

.page-about .about-zones__swatch[data-tone="violet"] {
  background: var(--violet);
}

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

/* ---------- 04 团队 ---------- */

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 26px;
}

.page-about .about-role {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-role--data::before {
  background: var(--violet);
}

.page-about .about-role--version::before {
  background: var(--yellow);
}

.page-about .about-role:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .about-role__title {
  margin: 0 0 10px;
  color: var(--text-strong);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--text);
}

.page-about .about-team__media {
  margin: 0 0 26px;
}

/* ---------- 05 时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 55%, var(--line-strong));
}

.page-about .about-tl {
  position: relative;
  padding: 0 0 30px;
}

.page-about .about-tl:last-child {
  padding-bottom: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-tl:nth-child(2)::before {
  border-color: var(--violet);
}

.page-about .about-tl:nth-child(3)::before {
  border-color: var(--paper);
}

.page-about .about-tl:nth-child(4)::before {
  border-color: var(--yellow);
}

.page-about .about-tl:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 224, 214, 0.16);
}

.page-about .about-tl__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-tl__ver {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text-strong);
}

.page-about .about-tl__title {
  margin: 0 0 8px;
  color: var(--text-strong);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.42;
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--text);
}

.page-about .about-timeline__note {
  margin: 28px 0 0 !important;
  padding: 14px 16px;
  border-left: 2px solid var(--mist);
  background: rgba(20, 28, 40, 0.6);
  font-size: 14.5px !important;
  color: var(--text-dim) !important;
}

/* ---------- 06 合作 ---------- */

.page-about .about-partner__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 26px;
}

.page-about .about-partner__card {
  border-left: 2px solid var(--orange);
}

.page-about .about-partner__title {
  margin: 0 0 10px;
  color: var(--text-strong);
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-partner__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 22px 20px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .about-cta__title {
  margin: 0 0 8px !important;
  color: var(--text-strong) !important;
  font-size: 17px !important;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .about-cta__desc {
  margin: 0 !important;
  font-size: 14.5px !important;
  line-height: 1.72;
  color: var(--text-dim) !important;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__inner {
    padding-top: 40px;
    padding-bottom: 64px;
  }

  .page-about .about-hero__panel {
    padding: 30px 30px 26px;
  }

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

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 26px;
  }

  .page-about .about-zones {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 30px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    padding-top: 64px;
    padding-bottom: 110px;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, var(--about-measure));
    gap: var(--about-flow-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    padding: 18px 16px 16px;
  }

  .page-about .about-rail__title {
    margin-bottom: 14px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__item {
    flex: 0 0 auto;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 8px 10px;
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: var(--ink-700);
    border-color: var(--line);
  }

  .page-about .about-rail__foot {
    display: block;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }

  .page-about .about-section {
    margin-bottom: 64px;
    padding-bottom: 64px;
    scroll-margin-top: 110px;
  }

  .page-about .about-quote {
    margin-bottom: 56px;
    padding: 34px 34px 28px;
  }

  .page-about .about-quote__text {
    font-size: 19px;
  }

  .page-about .about-zones {
    gap: 36px;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --about-rail: 224px;
    --about-flow-gap: 64px;
  }
}
</final>

.page-about {
  --paper-line: var(--paper-ink);
}