.page-about {
  --about-hairline: rgba(27, 74, 61, 0.4);
  --about-hairline-light: rgba(154, 168, 163, 0.28);
  background: var(--cream);
  color: var(--obsidian);
  overflow-x: clip;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: clamp(18px, 5vw, 40px) 0 clamp(48px, 8vw, 88px);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -30% 40%;
  height: 320px;
  background: radial-gradient(circle at 50% 50%, rgba(198, 242, 74, 0.12), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0 var(--gutter);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.9);
}

.page-about .about-hero__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(7, 26, 21, 0.78);
  color: var(--lime);
  font-size: 11px;
}

.page-about .about-hero__body {
  padding: 0 var(--gutter);
  max-width: 720px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(34px, 8.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: rgba(251, 248, 238, 0.82);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--moss);
  font-size: 13px;
  color: var(--grey);
}

.page-about .about-hero__num {
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 9vw, 110px) 0;
  background: var(--paper);
}

.page-about .about-section--paper {
  background: var(--cream);
}

.page-about .about-section--dark {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-section__head {
  display: block;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-about .about-idx {
  display: block;
  font-size: clamp(42px, 11vw, 96px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.page-about .about-section--dark .about-idx {
  color: var(--lime);
}

.page-about .about-section__title {
  margin: 0;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.page-about .about-section__lede {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--grey-deep);
}

.page-about .about-section--dark .about-section__lede {
  color: rgba(251, 248, 238, 0.76);
}

/* ---------- 01 要点 ---------- */
.page-about .about-points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-point {
  padding: 22px 22px 24px;
  border-radius: var(--radius-md);
  background: var(--paper);
  border: 1px solid var(--about-hairline);
}

.page-about .about-point__title {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.3;
  font-weight: 700;
}

.page-about .about-point__title::before {
  content: "";
  display: block;
  width: 28px;
  height: 4px;
  border-radius: 2px;
  background: var(--orange);
  margin-bottom: 12px;
}

.page-about .about-point p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey-deep);
}

.page-about .about-section--paper .about-point {
  background: var(--paper);
  border-color: var(--about-hairline);
}

/* ---------- 02 演进 ---------- */
.page-about .timeline-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

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

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.page-about .tl__item {
  padding-top: 18px;
  border-top: 1px solid var(--about-hairline-light);
}

.page-about .tl__item:last-child {
  border-bottom: 1px solid var(--about-hairline-light);
  padding-bottom: 22px;
}

.page-about .tl__year {
  display: inline-block;
  color: var(--lime);
  font-size: 12px;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: clamp(20px, 3.4vw, 24px);
  line-height: 1.3;
  font-weight: 700;
}

.page-about .tl__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(251, 248, 238, 0.74);
}

/* ---------- 03 方法 ---------- */
.page-about .about-tabs {
  border-radius: var(--radius-lg);
  background: var(--paper);
  border: 1px solid var(--about-hairline);
  padding: clamp(18px, 3vw, 30px);
}

.page-about .about-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .about-tabs__panel {
  padding: 4px 2px 2px;
  outline: none;
}

.page-about .about-tabs__panel h3 {
  margin: 6px 0 10px;
  font-size: clamp(20px, 3.6vw, 26px);
  line-height: 1.3;
  font-weight: 800;
}

.page-about .about-tabs__panel p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey-deep);
}

.page-about .about-step-no {
  color: var(--orange);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-flow {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(16px, 3vw, 28px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--paper);
}

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

.page-about .about-flow__line {
  fill: none;
  stroke: var(--moss);
  stroke-width: 2;
}

.page-about .about-flow__dot {
  fill: var(--ink);
  stroke: var(--lime);
  stroke-width: 2;
}

.page-about .about-flow__dot--hot {
  fill: var(--orange);
  stroke: var(--orange);
}

.page-about .about-flow__label {
  fill: var(--paper);
  font-family: var(--font-sans);
  font-size: 14px;
  text-anchor: middle;
}

.page-about .about-flow__tag {
  fill: var(--orange);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-about .about-flow figcaption {
  margin-top: 12px;
  color: var(--grey);
  font-size: 12px;
  line-height: 1.7;
}

.page-about .about-method__note {
  margin: clamp(22px, 4vw, 34px) 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey-deep);
  border-left: 3px solid var(--moss);
  padding-left: 16px;
}

/* ---------- 04 团队 ---------- */
.page-about .team-banner {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-about .team-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  opacity: 0.85;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .team-card {
  padding: 20px 18px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--moss);
}

.page-about .team-num {
  display: block;
  font-size: clamp(30px, 6vw, 46px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.page-about .team-role {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(251, 248, 238, 0.74);
}

.page-about .rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .rhythm__item {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--orange);
  background: rgba(12, 42, 34, 0.7);
}

.page-about .rhythm__item .mono {
  color: var(--orange);
  display: block;
  margin-bottom: 8px;
}

.page-about .rhythm__item p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(251, 248, 238, 0.76);
}

/* ---------- 05 场馆合作 ---------- */
.page-about .about-map {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hairline);
  background:
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(27, 74, 61, 0.16) 47px 48px),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(27, 74, 61, 0.16) 47px 48px),
    var(--paper);
  padding: 0;
  overflow: visible;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-map__dots {
  position: relative;
  height: 260px;
  overflow: visible;
}

.page-about .map-dot {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border-radius: 50%;
  background: var(--lime);
  border: 2px solid var(--ink);
  cursor: help;
  outline: none;
}

.page-about .map-dot:nth-child(2) {
  background: var(--orange);
}

.page-about .map-dot:nth-child(3) {
  background: var(--moss);
  border-color: var(--paper);
}

.page-about .map-dot:nth-child(4) {
  background: var(--orange);
}

.page-about .map-dot:hover,
.page-about .map-dot:focus-visible {
  box-shadow: 0 0 0 7px rgba(198, 242, 74, 0.28);
}

.page-about .map-dot__tip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(4px);
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .map-dot:hover .map-dot__tip,
.page-about .map-dot:focus-visible .map-dot__tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.page-about .about-map__legend {
  position: absolute;
  left: 16px;
  bottom: 14px;
  margin: 0;
  color: var(--grey-deep);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-about .about-points--two {
  margin-top: 4px;
}

.page-about .about-method__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-method__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-method__figure figcaption {
  padding: 12px 16px 16px;
  color: var(--grey);
  font-size: 12px;
  line-height: 1.7;
}

/* ---------- 06 收束 ---------- */
.page-about .about-closing {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(52px, 9vw, 108px) 0 clamp(56px, 9vw, 100px);
}

.page-about .about-closing .about-section__title {
  color: var(--paper);
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .about-quote {
  margin: 0 0 clamp(28px, 5vw, 46px);
  padding: clamp(20px, 4vw, 34px) clamp(24px, 5vw, 52px);
  background: var(--lime);
  color: var(--ink);
  font-size: clamp(24px, 5vw, 44px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.015em;
  clip-path: polygon(0 0, 100% 0, 96% 100%, 0 100%);
}

.page-about .about-closing__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-closing__list li {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--moss);
  background: var(--panel);
}

.page-about .about-closing__list .mono {
  display: block;
  color: var(--orange);
  margin-bottom: 8px;
  font-size: 12px;
}

.page-about .about-closing__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(251, 248, 238, 0.78);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-closing__link {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid var(--moss);
  padding-bottom: 2px;
  font-size: 12px;
}

.page-about .about-closing__link:hover {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-points,
  .page-about .rhythm,
  .page-about .about-closing__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-map__dots {
    height: 320px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
    gap: clamp(28px, 4vw, 60px);
    padding: clamp(28px, 4vw, 52px) var(--gutter) clamp(56px, 7vw, 92px);
  }

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

  .page-about .about-hero__media img {
    aspect-ratio: auto;
    height: 100%;
    min-height: 460px;
  }

  .page-about .about-hero__body {
    padding: 0;
    max-width: none;
    align-self: center;
  }

  .page-about .about-section__head {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    grid-template-areas:
      "idx title"
      "idx lede";
    column-gap: clamp(18px, 3vw, 44px);
    align-items: start;
  }

  .page-about .about-idx {
    grid-area: idx;
    margin: 0;
  }

  .page-about .about-section__title {
    grid-area: title;
  }

  .page-about .about-section__lede {
    grid-area: lede;
  }

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

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

  .page-about .timeline-wrap {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 64px);
  }

  .page-about .rail {
    display: block;
    position: sticky;
    top: 130px;
    align-self: start;
  }

  .page-about .rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 46px;
  }

  .page-about .rail__list::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--about-hairline-light);
  }

  .page-about .rail__item {
    position: relative;
    padding-left: 26px;
  }

  .page-about .rail__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 3px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--ink);
    border: 1px solid var(--grey);
  }

  .page-about .rail__item.is-now::before {
    background: var(--lime);
    border-color: var(--lime);
    box-shadow: 0 0 0 7px rgba(198, 242, 74, 0.16);
  }

  .page-about .rail__year {
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--grey);
  }

  .page-about .rail__item.is-now .rail__year {
    color: var(--lime);
  }

  .page-about .about-tabs {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    grid-template-areas:
      "bar panels"
      "bar panels";
    column-gap: clamp(22px, 4vw, 44px);
  }

  .page-about .about-tabs__bar {
    grid-area: bar;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    margin-bottom: 0;
    border-right: 1px solid var(--about-hairline);
    padding-right: 12px;
  }

  .page-about .about-tabs__panel {
    grid-area: panels;
  }

  .page-about .about-flow {
    padding: clamp(24px, 3vw, 36px);
  }

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

.page-about {
  --x: inherit;
  --y: inherit;
}