.page-about {
  --about-band-a: #0E2A3A;
  --about-band-b: #1B1440;
  --about-band-c: #3A0E1E;
  padding-bottom: 0;
  background:
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-900) 22%, var(--about-band-a) 46%, var(--about-band-b) 74%, var(--about-band-c) 100%);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 26px;
  padding-bottom: 6px;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-dim);
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-about .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .breadcrumb a:hover { text-decoration: underline; }
.page-about .breadcrumb .shell,
.page-about .breadcrumb {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 刊头 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: 18px 0 40px;
}
.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset-inline: var(--gutter);
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}
.page-about .about-masthead__shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-masthead__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  border-left: 2px solid var(--neon);
  padding-left: 12px;
}
.page-about .about-rail-note {
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--text-dim);
}
.page-about .about-rail-tick {
  font-size: 12px;
  color: var(--neon);
  letter-spacing: .1em;
}
.page-about .about-masthead__body { max-width: 46rem; }
.page-about .about-masthead h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 7.4vw, 62px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--text);
}
.page-about .about-lede {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}
.page-about .about-lede::first-line { color: var(--text); }

.page-about .about-masthead__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}
.page-about .about-chip {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(14, 42, 58, .7), rgba(10, 26, 47, .35));
  box-shadow: var(--shadow-1);
}
.page-about .about-chip--neon {
  border-color: rgba(57, 255, 136, .5);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, .12), var(--shadow-1);
}
.page-about .about-chip__k {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--text-dim);
}
.page-about .about-chip__v {
  font-size: 24px;
  font-weight: 700;
  color: var(--neon);
  line-height: 1.1;
}
.page-about .about-chip:nth-child(2) .about-chip__v { color: var(--cyan); }
.page-about .about-chip:nth-child(3) .about-chip__v { color: var(--heat); }

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 34px;
  padding-bottom: 60px;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, .6);
  padding: 16px 16px 14px;
}
.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--text-dim);
}
.page-about .about-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease, background-color .18s ease;
}
.page-about .about-index__list a .num { color: var(--cyan); font-size: 11px; }
.page-about .about-index__list a:hover {
  border-color: var(--neon);
  background: rgba(57, 255, 136, .08);
  transform: var(--rise);
}
.page-about .about-index__list a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}
.page-about .about-index__side {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapters {
  display: flex;
  flex-direction: column;
  gap: 30px;
  min-width: 0;
}
.page-about .about-chapter {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 42, 58, .5), rgba(10, 26, 47, .82));
  box-shadow: var(--shadow-1);
  padding: 22px 18px 26px;
  scroll-margin-top: 96px;
}
.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 14px;
  margin-bottom: 20px;
}
.page-about .about-chapter__no {
  font-size: 13px;
  color: var(--flare);
  letter-spacing: .14em;
}
.page-about .about-chapter h2 {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -.005em;
  color: var(--text);
}
.page-about .about-chapter__intro {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 44rem;
}
.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  min-width: 0;
}
.page-about .about-chapter__main p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .about-chapter__main p:last-child { margin-bottom: 0; }

/* 章节色区分区 */
.page-about .about-chapter--stance { border-top: 2px solid var(--cyan); }
.page-about .about-chapter--team { border-top: 2px solid var(--neon); background: linear-gradient(180deg, rgba(14, 42, 58, .62), rgba(10, 26, 47, .85)); }
.page-about .about-chapter--roadmap { border-top: 2px solid var(--about-band-b); background: linear-gradient(180deg, rgba(27, 20, 64, .62), rgba(10, 26, 47, .88)); }
.page-about .about-chapter--coverage { border-top: 2px solid var(--cyan); }
.page-about .about-chapter--trust { border-top: 2px solid var(--gold); background: linear-gradient(180deg, rgba(58, 14, 30, .55), rgba(10, 26, 47, .88)); }

/* ---------- 要点列表 ---------- */
.page-about .about-points {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-points li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}
.page-about .about-points__mark {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  background: var(--neon);
  transform: rotate(45deg);
  box-shadow: 0 0 10px rgba(57, 255, 136, .55);
}

/* ---------- 图 ---------- */
.page-about .about-figure { margin: 0; }
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--text-dim);
  border-left: 1px solid var(--line);
  padding-left: 10px;
}
.page-about .about-figure--band { margin-top: 26px; }
.page-about .about-figure--cover { align-self: start; }

/* ---------- 引言条 ---------- */
.page-about .about-quote-strip {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 3px solid var(--flare);
  background: linear-gradient(90deg, rgba(255, 90, 42, .12), transparent 78%);
}
.page-about .about-quote-strip p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .about-team-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, .55);
  padding: 16px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.page-about .about-team-card:hover,
.page-about .about-team-card:focus-visible {
  transform: var(--rise);
  border-color: var(--neon);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, .18), var(--shadow-1);
  outline: none;
}
.page-about .about-team-card:focus-visible { outline: 2px solid var(--neon); outline-offset: 2px; }
.page-about .about-team-card__no {
  display: block;
  font-size: 30px;
  font-weight: 700;
  color: var(--neon);
  line-height: 1;
}
.page-about .about-team-card h3 {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}
.page-about .about-team-grid .about-team-card:nth-child(2) .about-team-card__no { color: var(--cyan); }
.page-about .about-team-grid .about-team-card:nth-child(3) .about-team-card__no { color: var(--heat); }

.page-about .about-team-grid--media { margin-top: 22px; }

.page-about .about-flow {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(14, 42, 58, .42);
}
.page-about .about-flow h3 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-flow__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.page-about .about-flow__list li {
  position: relative;
  padding: 0 0 16px 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
  border-left: 1px solid var(--line);
}
.page-about .about-flow__list li:last-child { padding-bottom: 0; border-left-color: transparent; }
.page-about .about-flow__list li::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
}
.page-about .about-flow__list li:last-child::before { background: var(--neon); border-color: var(--neon); }
.page-about .about-flow__t {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-meter-block { margin-top: 18px; }
.page-about .about-meter-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text);
  margin-bottom: 6px;
}
.page-about .about-meter-row--muted { margin-top: 14px; color: var(--text-dim); }
.page-about .about-meter-row__v { color: var(--neon); }
.page-about .about-meter-row--muted .about-meter-row__v { color: var(--heat); }
.page-about .about-meter-block .meter {
  height: 6px;
  border-radius: 999px;
  background: rgba(30, 58, 92, .45);
  overflow: hidden;
}
.page-about .about-meter-block .meter-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--neon));
  transition: width 1s cubic-bezier(.22, .8, .3, 1);
}
.page-about .about-meter-block .meter-fill[data-fill="76"] {
  background: linear-gradient(90deg, var(--flare), var(--heat));
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  position: relative;
}
.page-about .about-tl-node {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, .58);
  padding: 16px 16px 18px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.page-about .about-tl-node:hover,
.page-about .about-tl-node:focus-visible {
  transform: var(--rise);
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(77, 216, 255, .18), var(--shadow-1);
}
.page-about .about-tl-node:focus-visible { outline: 2px solid var(--neon); outline-offset: 2px; }
.page-about .about-tl-node__year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 10px;
}
.page-about .about-tl-node h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}
.page-about .about-tl-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}
.page-about .about-tl-node--accent {
  border-color: rgba(57, 255, 136, .42);
  background: linear-gradient(180deg, rgba(57, 255, 136, .1), rgba(10, 26, 47, .75));
}
.page-about .about-tl-node--accent .about-tl-node__year { color: var(--neon); }
.page-about .about-roadmap-tail {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  border-left: 2px solid var(--about-band-b);
  padding-left: 14px;
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-coverage-side {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(14, 42, 58, .45);
}
.page-about .about-coverage-side__title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--text-dim);
  font-weight: 600;
}
.page-about .about-partners {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-partners li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  border-bottom: 1px dashed var(--line-soft);
  padding-bottom: 10px;
}
.page-about .about-partners li:last-child { border-bottom: none; padding-bottom: 0; }
.page-about .about-partners .num {
  flex: none;
  min-width: 2.4ch;
  font-size: 20px;
  font-weight: 700;
  color: var(--heat);
}
.page-about .about-coverage-side__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-sport-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-sport-strip span {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-dim);
  transition: color .18s ease, border-color .18s ease;
}
.page-about .about-sport-strip span:hover {
  color: var(--neon);
  border-color: var(--neon);
}

/* ---------- 资质与内容中心 ---------- */
.page-about .about-award {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px solid rgba(201, 162, 75, .42);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(201, 162, 75, .14), transparent 82%);
}
.page-about .about-award__badge {
  flex: none;
  color: var(--gold);
  font-size: 16px;
  line-height: 1.6;
}
.page-about .about-award p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}
.page-about .about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-trust-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .about-fact-card { padding: 16px 16px 14px; }
.page-about .about-fact-card h3 {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--text-dim);
  font-weight: 600;
}
.page-about .about-fact-card--alt h3 { color: var(--gold); }
.page-about .about-fact-list {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.page-about .about-fact-list > div {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-fact-list > div:last-child { border-bottom: none; padding-bottom: 0; }
.page-about .about-fact-list dt {
  font-size: 13px;
  color: var(--text-dim);
}
.page-about .about-fact-list dd {
  margin: 0;
  font-size: 13.5px;
  color: var(--neon);
  font-weight: 600;
}
.page-about .about-link-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-link-list a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color .18s ease, padding-left .18s ease;
}
.page-about .about-link-list li:last-child a { border-bottom: none; }
.page-about .about-link-list a:hover {
  color: var(--neon);
  padding-left: 6px;
}
.page-about .about-link-list a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 收尾 ---------- */
.page-about .about-closing {
  margin-top: 12px;
  border-top: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(57, 255, 136, .08), rgba(10, 26, 47, .9) 62%);
  padding: 34px 0 46px;
}
.page-about .about-closing__shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
}
.page-about .about-closing h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 4.4vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
}
.page-about .about-closing p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 40rem;
}
.page-about .about-closing__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-masthead__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team-grid--media {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    top: 30px;
    left: 6%;
    right: 6%;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--about-band-b) 55%, var(--neon));
    opacity: .55;
  }
  .page-about .about-tl-node { z-index: 1; }
  .page-about .about-closing__shell {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  }
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }
  .page-about .about-chapter__grid--reverse {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 34px;
    padding-top: 44px;
  }
  .page-about .about-index {
    position: sticky;
    top: 108px;
    align-self: start;
    padding: 18px 16px;
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 6px;
  }
  .page-about .about-index__list a {
    border-color: transparent;
    border-radius: var(--radius);
    padding: 8px 10px;
  }
  .page-about .about-index__list a:hover {
    border-color: var(--line);
    background: rgba(77, 216, 255, .07);
  }
  .page-about .about-index__side {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--line-soft);
    writing-mode: vertical-rl;
    letter-spacing: .18em;
    transform: rotate(180deg);
    height: 120px;
  }
  .page-about .about-chapter { padding: 30px 30px 34px; }
  .page-about .about-chapters { gap: 36px; }
  .page-about .about-chip__v { font-size: 28px; }
  .page-about .about-figure--cover { margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-tl-node,
  .page-about .about-index__list a,
  .page-about .about-link-list a,
  .page-about .about-meter-block .meter-fill {
    transition: none;
  }
  .page-about .about-team-card:hover,
  .page-about .about-tl-node:hover,
  .page-about .about-index__list a:hover {
    transform: none;
  }
}