.page-about {
  --about-gap: clamp(22px, 3.4vw, 40px);
  --about-radius: 15px;
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .breadcrumbs {
  padding-top: clamp(14px, 3vw, 22px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(10px, 2vw, 18px);
}

.page-about .about-hero-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  min-height: 380px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: var(--carbon);
}

.page-about .about-hero-img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: saturate(0.8) contrast(1.15);
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(11, 31, 26, 0.2) 0%, rgba(11, 31, 26, 0.88) 64%, var(--arena-deep) 100%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(200, 255, 61, 0.07) 79px 80px);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 46rem;
  padding: clamp(22px, 5vw, 56px);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--warm-white);
}

.page-about .about-hero-lede {
  margin: 16px 0 0;
  max-width: 44rem;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ink-mute);
}

.page-about .about-hero-meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
}

.page-about .about-hero-meta span {
  font-size: 17px;
  font-weight: 700;
  color: var(--lime-pulse);
}

/* ---------- 索引 + 正文两级布局 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
  padding-top: clamp(28px, 5vw, 54px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-index {
  padding: 12px 12px 10px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--glass-mint);
  backdrop-filter: blur(10px);
}

.page-about .about-index-title {
  margin: 4px 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--lime-pulse);
}

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

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

.page-about .about-index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-index-list a .mono {
  font-size: 11px;
  color: var(--lime-pulse);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  border-color: var(--lime-line);
  color: var(--warm-white);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  padding-bottom: clamp(30px, 4.6vw, 58px);
}

.page-about .about-section + .about-section {
  padding-top: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .about-num {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime-pulse);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.14;
  color: var(--warm-white);
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .about-lede a,
.page-about .about-note a,
.page-about .about-honors a,
.page-about .about-cta-text a {
  color: var(--ice-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-note {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mute);
}

/* ---------- 01 坐标图例 ---------- */
.page-about .about-legend {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-legend-item {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--pitch-shadow);
}

.page-about .about-legend-item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--about-radius) var(--about-radius) 0 0;
  background: var(--ice-blue);
}

.page-about .about-legend-item:nth-child(2)::before {
  background: var(--lime-pulse);
}

.page-about .about-legend-item:nth-child(3)::before {
  background: var(--orange-volt);
}

.page-about .about-legend-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--warm-white);
}

.page-about .about-legend-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 02 斜切时间轴 ---------- */
.page-about .about-route-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-timeline {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stop {
  position: relative;
  padding: 17px 18px 18px 20px;
  border-left: 3px solid var(--lime-pulse);
  border-radius: 0 12px 12px 0;
  background:
    linear-gradient(90deg, rgba(200, 255, 61, 0.08), transparent 58%),
    var(--carbon);
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .about-stop:hover {
  transform: translateX(4px);
}

.page-about .about-stop-year {
  display: inline-block;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--ice-blue);
}

.page-about .about-stop h3 {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--warm-white);
}

.page-about .about-stop p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-route-visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--carbon);
}

.page-about .about-route-visual img,
.page-about .about-flow-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team-total {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}

.page-about .about-team-total .num {
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime-pulse);
}

.page-about .about-team-grid {
  display: grid;
  gap: 12px;
}

.page-about .about-team-card {
  padding: 20px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--glass-mint);
}

.page-about .about-team-count {
  display: block;
  margin-bottom: 6px;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--ice-blue);
}

.page-about .about-team-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--warm-white);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 04 流程 ---------- */
.page-about .about-flow-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-flow {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow li:first-child {
  padding-top: 0;
}

.page-about .about-flow li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-flow-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--orange-volt);
  padding-top: 3px;
}

.page-about .about-flow h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--warm-white);
}

.page-about .about-flow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-flow-media {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--carbon);
}

/* ---------- 05 合作与认可 ---------- */
.page-about .about-partner-grid {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.page-about .about-partner-card {
  padding: 20px 18px;
  border-radius: var(--about-radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 100% 0%, rgba(159, 216, 255, 0.12), transparent 62%),
    var(--pitch-shadow);
}

.page-about .about-big {
  display: block;
  margin-bottom: 4px;
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--warm-white);
}

.page-about .about-partner-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--lime-pulse);
}

.page-about .about-partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

.page-about .about-honors li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  border-left: 2px solid var(--line-strong);
  background: rgba(20, 23, 26, 0.6);
  border-radius: 0 10px 10px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 06 选择理由 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 16px 0 18px;
  border-top: 2px solid var(--ice-blue);
}

.page-about .about-stat:nth-child(2n) {
  border-top-color: var(--lime-pulse);
}

.page-about .about-stat:nth-child(3n) {
  border-top-color: var(--orange-volt);
}

.page-about .about-stat-num {
  display: block;
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--warm-white);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 38px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--lime-line);
  border-radius: var(--about-radius);
  background: rgba(200, 255, 61, 0.05);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-stop:nth-child(2) {
    margin-left: 6%;
  }

  .page-about .about-stop:nth-child(3) {
    margin-left: 12%;
  }
}

@media (min-width: 900px) {
  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-about .about-route-grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, 0.72fr);
    align-items: start;
  }

  .page-about .about-route-visual {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 214px minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 58px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .about-index-list {
    flex-direction: column;
    gap: 5px;
    overflow: visible;
  }

  .page-about .about-index-list a {
    display: flex;
    padding: 9px 10px;
    border: 1px solid transparent;
    border-left: 2px solid var(--line);
    border-radius: 0 8px 8px 0;
    white-space: normal;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a:focus-visible {
    border-left-color: var(--lime-pulse);
    background: rgba(200, 255, 61, 0.07);
  }

  .page-about .about-stop:nth-child(2) {
    margin-left: 8%;
  }

  .page-about .about-stop:nth-child(3) {
    margin-left: 16%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stop,
  .page-about .about-index-list a {
    transition: none;
  }

  .page-about .about-stop:hover {
    transform: none;
  }
}
<<<END>>>