.page-about {
  --about-ink-soft: #C6D2E4;
  --about-dot-x: 11px;
  position: relative;
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(20px, 3vw, 36px) 0 clamp(34px, 5vw, 64px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -18% -25% -10% -15%;
  z-index: -1;
  background:
    linear-gradient(108deg, rgba(226, 58, 58, 0.24) 0%, rgba(226, 58, 58, 0) 44%),
    linear-gradient(256deg, rgba(45, 108, 223, 0.22) 0%, rgba(45, 108, 223, 0) 48%);
  pointer-events: none;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-readout {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-readout > li {
  background: var(--ink);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .readout-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .readout-num em {
  font-style: normal;
  color: var(--red);
}

.page-about .readout-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  position: relative;
  padding-block: clamp(40px, 6vw, 88px);
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid rgba(31, 46, 69, 0.7);
}

.page-about .section-title {
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 24ch;
}

.page-about .section-lede {
  margin-top: 12px;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .section-num {
  color: var(--red);
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 227, 224, 0.35);
}

.page-about a:hover,
.page-about a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 01 起源 ---------- */
.page-about .origin-body {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  gap: 16px;
  max-width: 68ch;
}

.page-about .origin-body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .origin-body p:first-child {
  padding-left: 18px;
  border-left: 3px solid var(--blue);
}

/* ---------- 02 场馆 ---------- */
.page-about .hw-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .hw-list {
  margin-top: clamp(18px, 2.6vw, 28px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .hw-item {
  padding: 20px 20px 22px;
}

.page-about .hw-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .hw-num em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--muted);
  margin-left: 2px;
}

.page-about .hw-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .hw-item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 03 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: var(--about-dot-x);
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--red) 0%, var(--blue) 100%);
  opacity: 0.45;
}

.page-about .tl-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 22px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-dot-x) - 6px);
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--red);
  box-shadow: 0 0 0 4px rgba(226, 58, 58, 0.12);
}

.page-about .tl-item--online::before {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(45, 108, 223, 0.14);
}

.page-about .tl-year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-body {
  min-width: 0;
}

.page-about .tl-item--venue .fold {
  border-left: 3px solid var(--red);
  background: var(--ink-2);
}

.page-about .tl-item--online .fold {
  border-left: 3px solid var(--blue);
  background: var(--ink-2);
}

.page-about .fold-head {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  align-items: start;
  text-align: left;
  padding: 16px 18px;
  background: none;
  border: 0;
  color: inherit;
  cursor: pointer;
  font-family: inherit;
}

.page-about .tl-tag {
  grid-column: 1;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .tl-item--venue .tl-tag {
  color: var(--red);
}

.page-about .tl-item--online .tl-tag {
  color: var(--blue-hi);
}

.page-about .tl-stage {
  grid-column: 1;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .tl-sum {
  grid-column: 1;
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .fold-icon {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 240ms var(--ease);
}

.page-about .tl-body .fold-panel {
  padding: 0 18px 18px;
}

.page-about .tl-body .fold-panel ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-about .tl-body .fold-panel li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ---------- 04 团队 ---------- */
.page-about .team-layout {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 32px);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team-card {
  padding: 18px 18px 20px;
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 05 覆盖 ---------- */
.page-about .reach-layout {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .reach-panel {
  padding: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-content: center;
}

.page-about .reach-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .reach-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1;
  color: #0B1220;
  font-variant-numeric: tabular-nums;
}

.page-about .reach-num em {
  font-style: normal;
  font-size: 0.5em;
}

.page-about .reach-label {
  font-size: 12.5px;
  line-height: 1.55;
  color: #4A5567;
}

.page-about .reach-copy {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .reach-copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 06 生态 ---------- */
.page-about .eco-layout {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-about .eco-copy {
  display: grid;
  gap: 14px;
}

.page-about .eco-copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .eco-figure {
  margin: 0;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(36px, 5vw, 72px);
  padding: clamp(26px, 4vw, 48px) 0;
  background: linear-gradient(112deg, rgba(226, 58, 58, 0.18) 0%, rgba(45, 108, 223, 0.2) 100%);
  border-left: 4px solid var(--red);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 26ch;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .cta-row {
  margin-top: clamp(18px, 2.4vw, 26px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 560px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-readout {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-readout > li {
    padding: 20px 18px 22px;
  }

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

@media (min-width: 880px) {
  .page-about {
    --about-dot-x: 101px;
  }

  .page-about .tl-item {
    padding-left: 0;
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 28px;
    padding-bottom: 26px;
  }

  .page-about .tl-item::before {
    left: calc(var(--about-dot-x) - 6px);
    top: 22px;
  }

  .page-about .tl-year {
    margin: 16px 0 0;
    text-align: right;
  }

  .page-about .team-layout {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
  }

  .page-about .reach-layout {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
  }

  .page-about .eco-layout {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .fold-icon {
    transition: none;
  }
}
<<<END>>>