.page-about {
  --about-grid: rgba(32, 227, 255, 0.12);
  --about-panel-line: rgba(36, 56, 67, 0.9);
}

.page-about .section {
  padding-block: clamp(52px, 8vw, 108px);
}

.page-about .section-head {
  max-width: 780px;
  margin-bottom: clamp(28px, 4vw, 56px);
}

.page-about h2 {
  margin: 0.18em 0 0.5em;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--text);
}

.page-about h3 {
  color: var(--text);
}

.page-about .lead {
  color: var(--muted);
  line-height: 1.75;
}

/* 首屏 */
.about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 6vw, 88px) 0 clamp(36px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 16%, rgba(32, 227, 255, 0.12), transparent 36%),
    var(--ink);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--about-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-grid) 1px, transparent 1px);
  background-size: clamp(64px, 10vw, 124px) clamp(64px, 10vw, 124px);
  opacity: 0.55;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 90%);
}

.about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 60px);
}

.about-hero__copy h1 {
  max-width: 16ch;
  margin: 0.22em 0 0.35em;
  font-family: var(--font-display);
  font-size: clamp(2.45rem, 6.2vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--text);
}

.about-hero__copy .lead {
  max-width: 38em;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.about-hero__facts li {
  display: grid;
  gap: 4px;
}

.about-hero__facts .mono {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.about-hero__facts li > span:last-child {
  color: var(--muted);
  font-size: 12px;
}

.about-hero__media {
  position: relative;
  margin: 0;
}

.about-hero__media::before {
  content: "";
  position: absolute;
  inset: -14px 14px 14px -14px;
  border: 1px solid rgba(32, 227, 255, 0.35);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 14% 100%, 0 92%);
  pointer-events: none;
}

.about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 12% 100%, 0 94%);
  filter: saturate(0.9) contrast(1.06);
}

.about-hero__media figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

/* 章节索引 */
.about-index {
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}

.about-index__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 12px;
  scrollbar-width: thin;
}

.about-index a {
  flex: 0 0 auto;
  padding: 8px 11px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}

.about-index a[aria-current="true"],
.about-index a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* 坐标与场馆切片 */
.about-coordinate__layout {
  display: grid;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.about-metric {
  min-height: 154px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(16px, 3vw, 28px);
  background: var(--panel);
}

.about-metric__value {
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

.about-metric__value small {
  margin-left: 4px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.32em;
  letter-spacing: 0;
}

.about-metric:nth-child(2) .about-metric__value,
.about-metric:nth-child(4) .about-metric__value {
  color: var(--lime);
}

.about-metric p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.about-coordinate__narrative h3 {
  margin: 0 0 12px;
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
}

.about-coordinate__narrative p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 36em;
}

.about-note {
  border-left: 2px solid var(--orange);
  padding-left: 16px;
}

.about-note strong {
  color: var(--text);
}

/* 时间线 */
.about-yearnav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 8px;
  scrollbar-width: thin;
}

.about-yearnav a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  text-decoration: none;
  white-space: nowrap;
}

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

.about-tl {
  position: relative;
  margin-top: clamp(18px, 3vw, 28px);
}

.about-tl__item {
  display: grid;
  gap: 14px;
  padding: clamp(24px, 4vw, 40px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.about-tl__year {
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.2vw, 3.6rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
}

.about-tl__item--tool .about-tl__year {
  color: var(--lime);
}

.about-tl__body {
  position: relative;
  padding-left: 22px;
}

.about-tl__body::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  bottom: 4px;
  width: 1px;
  background: var(--line);
}

.about-tl__body::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 12px rgba(255, 90, 31, 0.75);
}

.about-tl__item--tool .about-tl__body::after {
  background: var(--lime);
  box-shadow: 0 0 12px rgba(200, 255, 61, 0.6);
}

.about-tl__phase {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.about-tl__item--tool .about-tl__phase {
  color: var(--lime);
}

.about-tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: clamp(1.15rem, 2vw, 1.48rem);
  font-weight: 700;
  line-height: 1.35;
}

.about-tl__body p {
  max-width: 38em;
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.78;
}

/* 团队 */
.about-team__grid {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}

.about-team__copy h2 {
  margin-top: 0.18em;
}

.about-bars {
  list-style: none;
  display: grid;
  gap: 18px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
}

.about-bars__head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text);
  font-size: 14px;
}

.about-bars__head .mono {
  color: var(--muted);
  font-size: 12px;
}

.about-bar {
  display: block;
  width: var(--v);
  height: 8px;
  margin-top: 8px;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  box-shadow: 0 0 14px rgba(32, 227, 255, 0.24);
}

.about-bars li:nth-child(2) .about-bar {
  background: linear-gradient(90deg, var(--cyan), rgba(200, 255, 61, 0.55));
}

.about-bars li:nth-child(4) .about-bar {
  background: linear-gradient(90deg, var(--lime), var(--cyan));
}

.about-rhythm {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: clamp(24px, 4vw, 32px) 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.about-rhythm li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.about-rhythm .mono {
  display: inline-block;
  min-width: 4.2em;
  color: var(--cyan);
  font-size: 11px;
}

.about-team__media {
  margin: 0;
}

.about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  border: 1px solid var(--line);
}

.about-team__media figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* 赛事覆盖 */
.about-teams__numbers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.about-scope {
  display: grid;
  align-content: space-between;
  min-height: 148px;
  padding: clamp(16px, 3vw, 26px);
  background: var(--ink-2);
}

.about-scope__num {
  color: var(--lime);
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

.about-scope__label {
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.about-teams__body {
  display: grid;
  gap: 20px;
  align-items: start;
  margin-top: clamp(24px, 4vw, 38px);
}

.about-teams__body p {
  max-width: 44em;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.about-teams__body .btn {
  justify-self: start;
}

/* 服务清单 */
.about-services__list {
  margin-top: clamp(22px, 3vw, 34px);
}

.about-service {
  border-top: 1px solid var(--line);
}

.about-service:last-child {
  border-bottom: 1px solid var(--line);
}

.about-service summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 26px;
  gap: 14px;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

.about-service summary::-webkit-details-marker {
  display: none;
}

.about-service__no {
  color: var(--orange);
  font-size: 12px;
}

.about-service__name {
  color: var(--text);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 600;
}

.about-service__mark {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  text-align: center;
  transition: transform 180ms var(--ease);
}

.about-service[open] .about-service__mark {
  transform: rotate(45deg);
}

.about-service__body {
  padding: 0 0 24px clamp(48px, 7vw, 72px);
}

.about-service__body p {
  max-width: 46em;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.about-services__more {
  margin: 24px 0 0;
  font-size: 14px;
}

.about-services__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(32, 227, 255, 0.45);
}

.about-services__more span {
  margin: 0 10px;
  color: var(--line);
}

/* 到访 */
.about-visit__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: stretch;
}

.about-visit__media {
  margin: 0;
}

.about-visit__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 260px;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  clip-path: polygon(0 5%, 100% 0, 100% 100%, 0 100%);
  border: 1px solid var(--line);
  filter: saturate(0.9) contrast(1.04);
}

.about-visit__media figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.about-visit__panel {
  padding: clamp(20px, 3.4vw, 34px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.about-visit__panel h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
}

.about-visit__panel > p {
  color: var(--muted);
  line-height: 1.78;
}

.about-hours {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 20px 0;
  padding: 16px 0;
  border-block: 1px solid var(--line);
}

.about-hours li {
  color: var(--text);
  font-size: 14px;
}

.about-hours .mono {
  display: inline-block;
  min-width: 6.2em;
  color: var(--cyan);
  font-size: 11px;
}

.about-visit__panel .copy-btn {
  margin-bottom: 18px;
}

.about-contact {
  display: grid;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.about-contact p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.about-contact .mono {
  display: inline-block;
  min-width: 4.5em;
  color: var(--cyan);
  font-size: 11px;
}

.about-contact a {
  color: var(--text);
  text-decoration-color: rgba(32, 227, 255, 0.5);
  text-underline-offset: 4px;
}

.about-visit__link {
  margin: 18px 0 0;
  font-size: 14px;
}

.about-visit__link a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 31, 0.55);
}

/* 收尾 */
.about-cta {
  padding-block: clamp(38px, 6vw, 72px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(105deg, rgba(32, 227, 255, 0.1), transparent 55%),
    var(--ink);
}

.about-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.about-cta h2 {
  margin: 0.15em 0 0.3em;
}

.about-cta p {
  max-width: 42em;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 760px) {
  .about-teams__numbers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .about-teams__body .btn {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .about-coordinate__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .about-visit__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: stretch;
  }

  .about-tl__item {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
  }

  .about-tl__year {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
    align-self: start;
  }

  .about-yearnav {
    max-width: 620px;
  }

  .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .about-hero__media {
    margin-top: 8px;
  }

  .about-metric {
    min-height: 180px;
  }

  .about-scope {
    min-height: 178px;
  }
}
<<<END>>>

.page-about {
  --v: 1rem;
}