.page-about {
  --about-gap: clamp(16px, 2.4vw, 26px);
  --about-panel: linear-gradient(150deg, rgba(22, 53, 42, 0.92), rgba(12, 31, 24, 0.72));
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: hidden;
}

.page-about .about-wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(18px, 3vw, 40px) var(--pad) 0;
}

.page-about a {
  color: inherit;
  text-decoration: none;
}

.page-about .about-crumb {
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 52px) 0 clamp(28px, 5vw, 60px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -8% -12% auto auto;
  width: min(64vw, 640px);
  height: clamp(180px, 34vw, 340px);
  background:
    radial-gradient(120% 100% at 80% 10%, rgba(52, 245, 208, 0.16), transparent 62%),
    linear-gradient(205deg, rgba(22, 53, 42, 0.9), rgba(7, 19, 15, 0));
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 82%);
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow {
  color: var(--aqua);
  margin-bottom: 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.2vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 15em;
}

.page-about .about-hero__title-mark {
  color: var(--aqua-soft);
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 3px solid var(--orange);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(14px, 2vw, 24px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .about-hero__lead {
  font-family: var(--font-editorial);
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.72;
  color: var(--paper);
  margin: 0;
  max-width: 46em;
}

.page-about .about-hero__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  margin: clamp(24px, 4vw, 38px) 0 0;
}

.page-about .about-figures__item {
  background: var(--ink-800);
  padding: 16px 18px 18px;
}

.page-about .about-figures dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  margin-bottom: 8px;
}

.page-about .about-figures dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  color: var(--aqua);
  letter-spacing: -0.02em;
  line-height: 1;
}

.page-about .about-figures__unit {
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 44px);
  padding-top: clamp(26px, 4vw, 48px);
}

.page-about .about-toc {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-toc__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
  margin: 0 0 10px;
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 13px;
  color: var(--mist);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--paper);
  border-color: rgba(52, 245, 208, 0.55);
}

.page-about .about-toc__link.is-current {
  color: var(--ink-900);
  background: var(--aqua);
  border-color: var(--aqua);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.75;
}

.page-about .about-body {
  display: grid;
  gap: clamp(38px, 6vw, 80px);
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--topbar-h) + 20px);
  min-width: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: clamp(16px, 2.6vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-sec__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--aqua);
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border: 1px solid rgba(52, 245, 208, 0.36);
  border-radius: 4px;
  flex: none;
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0;
  line-height: 1.18;
}

.page-about .about-sec__intro {
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.78;
  color: var(--mist);
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 52em;
}

.page-about .about-sec__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .about-sec__main p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--paper);
  margin: 0 0 16px;
}

.page-about .about-sec__main p:first-child::first-letter {
  font-family: var(--font-editorial);
  font-size: 2.6em;
  line-height: 0.9;
  float: left;
  margin: 6px 10px 0 0;
  color: var(--aqua-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-fig {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

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

.page-about .about-fig .figure__caption {
  display: block;
  padding: 12px 16px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-fig .figure__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--aqua);
  margin-bottom: 4px;
}

/* ---------- 流程 ---------- */
.page-about .about-step-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-step {
  background: var(--about-panel), var(--ink-800);
  padding: 18px 20px 20px;
  position: relative;
  transition: background 0.24s var(--ease);
}

.page-about .about-step:hover {
  background: linear-gradient(150deg, rgba(44, 79, 66, 0.95), rgba(12, 31, 24, 0.8));
}

.page-about .about-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 6px;
}

.page-about .about-step__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 覆盖版图 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: center;
}

.page-about .about-donut {
  max-width: 320px;
  margin-inline: auto;
  width: 100%;
  filter: drop-shadow(0 12px 34px rgba(52, 245, 208, 0.12));
}

.page-about .about-donut__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-sports {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-sport {
  display: grid;
  grid-template-columns: 12px minmax(64px, auto) 1fr;
  align-items: center;
  gap: 12px;
  background: var(--ink-800);
  padding: 12px 16px;
  transition: background 0.2s var(--ease);
}

.page-about .about-sport:hover {
  background: var(--ink-700);
}

.page-about .about-sport__dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--ink-600);
  display: block;
}

.page-about .about-sport__dot--hot {
  background: var(--aqua);
}

.page-about .about-sport__dot--warm {
  background: var(--orange);
}

.page-about .about-sport__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-sport__desc {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team__card {
  background: var(--about-panel), var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: 18px 18px 16px;
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(52, 245, 208, 0.55);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.36);
}

.page-about .about-team__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--aqua-soft);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.page-about .about-team__duty {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--paper);
}

.page-about .about-team__meta {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-about .about-aside-band {
  margin-top: clamp(18px, 3vw, 28px);
  padding: 18px 20px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 122, 47, 0.07);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.page-about .about-aside-band__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
  margin: 0 0 8px;
}

.page-about .about-aside-band__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper);
}

/* ---------- 历程 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  position: relative;
  padding-left: 18px;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(52, 245, 208, 0.7), rgba(44, 79, 66, 0.2));
}

.page-about .about-year {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: 16px 18px 18px;
  transition: border-color 0.24s var(--ease);
}

.page-about .about-year:hover {
  border-color: rgba(52, 245, 208, 0.5);
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: 0 0 0 4px rgba(52, 245, 208, 0.14);
}

.page-about .about-year__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--aqua);
  display: block;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.page-about .about-year__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-year p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 合作 ---------- */
.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-partner-list li {
  background: var(--ink-700);
  padding: 16px;
}

.page-about .about-partner-list__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--orange);
  line-height: 1.1;
  margin-bottom: 6px;
}

.page-about .about-partner-list__label {
  display: block;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-cta {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(90% 130% at 6% 0%, rgba(52, 245, 208, 0.12), transparent 58%),
    linear-gradient(160deg, rgba(22, 53, 42, 0.9), rgba(7, 19, 15, 0.9));
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  font-family: var(--font-editorial);
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.72;
  color: var(--paper);
  max-width: 42em;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-sport {
    grid-template-columns: 12px 1fr;
    grid-template-areas:
      "dot name"
      "dot desc";
    row-gap: 2px;
    align-items: start;
  }

  .page-about .about-sport__dot {
    grid-area: dot;
    margin-top: 8px;
  }

  .page-about .about-sport__name {
    grid-area: name;
  }

  .page-about .about-sport__desc {
    grid-area: desc;
  }
}

@media (min-width: 780px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(24px, 3.6vw, 52px);
  }

  .page-about .about-sec__cols {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-about .about-sec__cols--partner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .page-about .about-step-layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.25fr);
  }

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

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    display: none;
  }

  .page-about .about-year::before {
    display: none;
  }

  .page-about .about-year--b,
  .page-about .about-year--d {
    transform: translateY(34px);
  }

  .page-about .about-year--a {
    border-top: 2px solid var(--aqua);
  }

  .page-about .about-year--c {
    border-top: 2px solid var(--orange);
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 20px);
    border-top: none;
    padding-top: 0;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc__link {
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    border-color: transparent;
    border-left: 2px solid var(--line-soft);
    padding: 9px 12px;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .about-toc__link.is-current {
    border-left-color: var(--aqua);
    background: rgba(52, 245, 208, 0.1);
    color: var(--paper);
  }

  .page-about .about-toc__link.is-current .about-toc__idx {
    color: var(--aqua);
  }

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

  .page-about .about-partner-list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1200px) {
  .page-about .about-sec__cols {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 0.95fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-fig--side {
    margin-top: 26px;
  }

  .page-about .about-step-layout {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.34fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-step,
  .page-about .about-year,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-team__card:focus-within {
    transform: none;
  }
}