.page-about {
  --about-shift: 10px;
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 5vw, 54px) 0 clamp(24px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-size: clamp(34px, 6.4vw, 62px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.55vw, 17px);
  line-height: 1.78;
  color: rgba(237, 230, 214, 0.82);
}

.page-about .about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-facts > li {
  background: var(--deep-2);
  padding: 16px 16px 15px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-facts__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: clamp(38px, 6vw, 76px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec:last-of-type {
  border-bottom: 0;
}

.page-about .sec-head {
  margin-bottom: clamp(20px, 3.2vw, 34px);
}

.page-about .sec-no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.16;
  font-weight: 900;
  color: var(--paper);
}

.page-about .sec-head p {
  margin: 12px 0 0;
  max-width: 62ch;
  line-height: 1.78;
  color: rgba(237, 230, 214, 0.76);
}

/* ---------- 图片框 ---------- */
.page-about .about-figure {
  margin: 0;
  background: var(--deep-2);
  border: 1px solid var(--line);
  border-left: 4px solid var(--clay);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-figure--band {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-figure--band img {
  max-height: 340px;
}

.page-about .about-figure--tall img {
  max-height: 420px;
}

/* ---------- 编年时间轴 ---------- */
.page-about .tl-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--cyan) 52%, var(--moss));
  opacity: 0.6;
}

.page-about .tl-item {
  position: relative;
  padding-left: 40px;
  padding-right: var(--about-shift);
}

.page-about .tl-item + .tl-item {
  margin-top: 14px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--orange);
}

.page-about .tl-item:nth-child(2n)::before {
  border-color: var(--cyan);
}

.page-about .tl-item:nth-child(3n)::before {
  border-color: var(--moss);
}

.page-about .tl-node {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--clay);
  box-shadow: 0 10px 24px rgba(3, 12, 24, 0.42);
}

.page-about .tl-item:nth-child(2n) .tl-node {
  border-left-color: var(--moss);
}

.page-about .tl-item:nth-child(3n) .tl-node {
  border-left-color: var(--cyan);
}

.page-about .tl-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-node summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-node__name {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-node__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-left: auto;
  flex: 0 0 auto;
  align-self: center;
}

.page-about .tl-node__mark::before,
.page-about .tl-node__mark::after {
  content: "";
  position: absolute;
  background: var(--stone);
  transition: transform 0.25s var(--ease);
}

.page-about .tl-node__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-about .tl-node__mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-about .tl-node[open] .tl-node__mark::after {
  transform: scaleY(0);
}

.page-about .tl-node__body {
  padding: 0 18px 17px;
}

.page-about .tl-node__body p {
  margin: 0;
  max-width: 58ch;
  line-height: 1.78;
  color: rgba(237, 230, 214, 0.8);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 20px;
}

.page-about .donut-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  padding: 20px 20px 18px;
}

.page-about .donut-card__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .donut-wrap {
  display: grid;
  place-items: center;
  padding: 6px 0 10px;
}

.page-about .donut {
  width: min(210px, 60vw);
  height: auto;
}

.page-about .ring-track {
  fill: none;
  stroke: rgba(237, 230, 214, 0.1);
}

.page-about .ring-seg {
  fill: none;
}

.page-about .ring-seg--a {
  stroke: var(--orange);
}

.page-about .ring-seg--b {
  stroke: var(--cyan);
}

.page-about .ring-seg--c {
  stroke: var(--moss);
}

.page-about .donut__value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  fill: var(--paper);
}

.page-about .donut__unit {
  font-size: 11px;
  letter-spacing: 0.18em;
  fill: var(--stone);
}

.page-about .donut-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .donut-legend > li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 9px;
  border-top: 1px dashed var(--line-soft);
  font-size: 15px;
  color: rgba(237, 230, 214, 0.82);
}

.page-about .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.page-about .dot--a {
  background: var(--orange);
}

.page-about .dot--b {
  background: var(--cyan);
}

.page-about .dot--c {
  background: var(--moss);
}

.page-about .donut-legend__name {
  flex: 1 1 auto;
}

.page-about .donut-legend__val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .team-notes {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .rhythm {
  margin: 0;
  border: 1px solid var(--line);
  border-left: 4px solid var(--moss);
  background: rgba(14, 42, 71, 0.55);
}

.page-about .rhythm__row {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
}

.page-about .rhythm__row + .rhythm__row {
  border-top: 1px dashed var(--line-soft);
}

.page-about .rhythm dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .rhythm dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(237, 230, 214, 0.86);
}

.page-about .rhythm__num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  padding: 0 2px;
}

/* ---------- 场馆 ---------- */
.page-about .venue-grid {
  display: grid;
  gap: 22px;
}

.page-about .venue-copy p {
  margin: 0 0 16px;
  max-width: 58ch;
  line-height: 1.78;
  color: rgba(237, 230, 214, 0.82);
}

.page-about .venue-copy p:last-of-type {
  margin-bottom: 22px;
}

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

.page-about .venue-tags > li {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 15px;
  color: rgba(237, 230, 214, 0.78);
}

/* ---------- 栏目线 ---------- */
.page-about .lanes {
  display: grid;
  gap: 14px;
}

.page-about .lane {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 18px 18px 16px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .lane::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--clay);
}

.page-about .lane--moss::after {
  background: var(--moss);
}

.page-about .lane--cyan::after {
  background: var(--cyan);
}

.page-about .lane--coral::after {
  background: var(--coral);
}

.page-about .lane--steel::after {
  background: var(--steel);
}

.page-about .lane__tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 4px 8px;
  color: var(--paper);
  background: rgba(192, 112, 74, 0.28);
  border: 1px solid rgba(192, 112, 74, 0.62);
}

.page-about .lane--moss .lane__tag {
  background: rgba(110, 139, 61, 0.26);
  border-color: rgba(110, 139, 61, 0.62);
}

.page-about .lane--cyan .lane__tag {
  background: rgba(23, 209, 196, 0.2);
  border-color: rgba(23, 209, 196, 0.55);
}

.page-about .lane--coral .lane__tag {
  background: rgba(255, 90, 95, 0.2);
  border-color: rgba(255, 90, 95, 0.55);
}

.page-about .lane--steel .lane__tag {
  background: rgba(27, 67, 104, 0.5);
  border-color: rgba(154, 166, 178, 0.45);
}

.page-about .lane__title {
  margin: 2px 0 0;
  font-size: clamp(18px, 2.1vw, 21px);
  font-weight: 800;
  color: var(--paper);
}

.page-about .lane p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(237, 230, 214, 0.76);
}

/* ---------- 发布工序 ---------- */
.page-about .audit {
  background: linear-gradient(135deg, rgba(14, 42, 71, 0.92), rgba(4, 16, 31, 0.98));
  border: 1px solid var(--line);
  border-left: 4px solid var(--coral);
  padding: clamp(18px, 3vw, 30px);
}

.page-about .audit-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .audit-steps > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-top: 18px;
  border-top: 1px dashed var(--line-soft);
}

.page-about .audit-steps > li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .audit-steps__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--coral);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}

.page-about .audit-steps h3 {
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  color: var(--paper);
}

.page-about .audit-steps p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.76;
  color: rgba(237, 230, 214, 0.78);
}

/* ---------- 合作 ---------- */
.page-about .partners {
  display: grid;
  gap: 14px;
}

.page-about .partner {
  background: rgba(14, 42, 71, 0.5);
  border: 1px solid var(--line);
  border-top: 3px solid var(--clay);
  padding: 18px 18px 16px;
}

.page-about .partner:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .partner:nth-child(3) {
  border-top-color: var(--moss);
}

.page-about .partner__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  color: var(--paper);
}

.page-about .partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(237, 230, 214, 0.76);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(22px, 3.6vw, 36px);
  background: linear-gradient(120deg, rgba(27, 67, 104, 0.55), rgba(6, 20, 38, 0.96) 62%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  display: grid;
  gap: 20px;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  line-height: 1.76;
  color: rgba(237, 230, 214, 0.8);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: clamp(40px, 5vw, 66px);
  }

  .page-about .tl-item {
    padding-left: 46px;
  }

  .page-about .tl-item:nth-child(2n) .tl-node {
    transform: translateX(10px);
  }

  .page-about .tl-item:nth-child(3n) .tl-node {
    transform: translateX(5px);
  }

  .page-about .tl-node summary {
    padding: 17px 22px;
  }

  .page-about .tl-node__body {
    padding: 0 22px 19px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }

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

@media (min-width: 980px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .venue-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

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

@media (min-width: 1180px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 26px;
  }
}
<<<END>>>