.page-about {
  --about-rail: 300px;
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background-color: var(--deep);
  background-image:
    radial-gradient(circle at 84% 10%, rgba(243, 182, 63, 0.16), transparent 44%),
    radial-gradient(circle at 2% 98%, rgba(24, 183, 106, 0.28), transparent 52%);
  color: rgba(246, 248, 244, 0.82);
  padding-block: clamp(30px, 4.6vw, 58px) clamp(36px, 5vw, 72px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  margin: 18px 0 0;
  color: var(--kiwi-bright);
  letter-spacing: 0.18em;
}

.page-about .about-hero .breadcrumb,
.page-about .about-hero .breadcrumb li,
.page-about .about-hero .breadcrumb a {
  color: rgba(246, 248, 244, 0.6);
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--kiwi-bright);
}

.page-about .about-hero__title {
  color: var(--paper);
  font-size: clamp(29px, 5.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  margin: 12px 0 18px;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 33em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(126px, 1fr));
  gap: 16px 22px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-hero__facts dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(246, 248, 244, 0.56);
}

.page-about .about-hero__facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--turf);
}

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

.page-about .about-hero__figure .media__caption {
  color: rgba(246, 248, 244, 0.62);
  font-size: 12.5px;
  padding: 10px 14px 12px;
  margin: 0;
}

/* ---------- 主体画布 ---------- */
.page-about .about-canvas {
  background: var(--pale);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-stream {
  --stream-pad: 26px;
  --node-size: 12px;
  --line-x: 10px;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  padding-left: var(--stream-pad);
  min-width: 0;
}

.page-about .about-stream::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: calc(var(--line-x) - 1px);
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--kiwi) 0%, var(--kiwi-bright) 32%, var(--gold) 64%, var(--turf) 100%);
  opacity: 0.55;
}

.page-about .about-stop {
  position: relative;
  background: var(--paper);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.2vw, 34px);
  box-shadow: 0 14px 34px rgba(11, 46, 35, 0.07);
  min-width: 0;
}

.page-about .about-stop::before {
  content: "";
  position: absolute;
  top: 26px;
  left: calc(var(--line-x) - var(--stream-pad) - var(--node-size) / 2);
  width: var(--node-size);
  height: var(--node-size);
  border-radius: 50%;
  background: var(--kiwi);
  box-shadow: 0 0 0 4px var(--pale), 0 0 0 5px rgba(24, 183, 106, 0.36);
  transition: transform 240ms var(--ease), background-color 240ms var(--ease);
}

.page-about .about-stop:hover::before {
  transform: scale(1.3);
  background: var(--gold);
}

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

.page-about .about-stop .h-section {
  margin: 0 0 14px;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-stop__lead {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  font-weight: 600;
  color: var(--turf);
}

.page-about .about-stop__body {
  max-width: 40em;
}

.page-about .about-stop__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(16, 22, 20, 0.82);
}

.page-about .about-stop__body p:last-child {
  margin-bottom: 0;
}

/* 深墨绿章节 */
.page-about .about-stop--deep {
  background: var(--deep);
  color: rgba(246, 248, 244, 0.8);
  box-shadow: 0 18px 40px rgba(11, 46, 35, 0.24);
}

.page-about .about-stop--deep::before {
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--pale), 0 0 0 5px rgba(243, 182, 63, 0.42);
}

.page-about .about-stop--deep .h-section {
  color: var(--paper);
}

.page-about .about-stop--deep .about-stop__index {
  color: var(--kiwi-bright);
}

.page-about .about-stop--deep .about-stop__lead {
  color: var(--gold);
}

.page-about .about-stop--deep .about-stop__body p {
  color: rgba(246, 248, 244, 0.8);
}

/* 版本演进列表 */
.page-about .about-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

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

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

.page-about .about-versions__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--deep);
  background: var(--kiwi-bright);
  border-radius: 999px;
  padding: 4px 11px;
}

.page-about .about-versions li:last-child .about-versions__tag {
  background: var(--gold);
}

.page-about .about-versions__title {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-versions p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(246, 248, 244, 0.78);
}

/* 图文并排 */
.page-about .about-grid-media {
  display: grid;
  gap: 20px;
  align-items: start;
}

.page-about .about-stop__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--turf);
}

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

.page-about .about-stop__figure .media__caption {
  margin: 0;
  padding: 9px 2px 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--turf);
  background: transparent;
}

/* 比赛日流程 */
.page-about .about-flow {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-about .about-flow li {
  padding: 13px 14px;
  border-radius: var(--radius);
  background: var(--pale);
  border-left: 3px solid var(--kiwi);
}

.page-about .about-flow strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--deep);
  margin-bottom: 5px;
}

.page-about .about-flow span {
  display: block;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(16, 22, 20, 0.78);
}

/* 团队名册 */
.page-about .about-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-roster li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--pale);
}

.page-about .about-roster__num {
  grid-row: 1 / 3;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--turf);
}

.page-about .about-roster__role {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-roster p {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: rgba(16, 22, 20, 0.74);
}

/* 可展开对照 */
.page-about .about-details {
  margin-top: 18px;
  padding: 0 16px;
  border-radius: var(--radius);
  background: var(--pale);
}

.page-about .about-details summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 0;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--deep);
}

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

.page-about .about-details summary::after {
  content: "＋";
  float: right;
  font-family: var(--font-mono);
  color: var(--kiwi);
}

.page-about .about-details[open] summary::after {
  content: "－";
}

.page-about .about-map {
  margin: 0;
  padding: 0 0 16px;
  display: grid;
  gap: 10px;
}

.page-about .about-map div {
  padding-top: 10px;
  border-top: 1px solid rgba(16, 22, 20, 0.1);
}

.page-about .about-map dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--turf);
}

.page-about .about-map dd {
  margin: 3px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(16, 22, 20, 0.8);
}

/* 合作生态 */
.page-about .about-partners {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-partners__card {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line-dark);
}

.page-about .about-partners__card h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  color: var(--kiwi-bright);
}

.page-about .about-partners__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(246, 248, 244, 0.76);
}

.page-about .about-kpis {
  list-style: none;
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-dark);
  display: grid;
  gap: 14px;
}

.page-about .about-kpis li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(246, 248, 244, 0.72);
}

.page-about .about-kpis__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold);
}

/* ---------- 右栏状态面板 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-panel {
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  background: var(--deep);
  color: rgba(246, 248, 244, 0.78);
  box-shadow: 0 18px 40px rgba(11, 46, 35, 0.2);
}

.page-about .about-panel__eyebrow {
  margin: 0 0 14px;
  color: var(--kiwi-bright);
  letter-spacing: 0.16em;
}

.page-about .about-panel__list {
  margin: 0;
  display: grid;
}

.page-about .about-panel__list div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-panel__list div:last-child {
  border-bottom: 0;
}

.page-about .about-panel__list dt {
  margin: 0;
  font-size: 12.5px;
  color: rgba(246, 248, 244, 0.58);
}

.page-about .about-panel__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-panel__nav {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-panel__navtitle {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: rgba(246, 248, 244, 0.5);
}

.page-about .about-panel__nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-panel__nav a {
  display: inline-block;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  text-decoration: none;
  color: rgba(246, 248, 244, 0.82);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line-dark);
  transition: background-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-panel__nav a:hover,
.page-about .about-panel__nav a:focus-visible {
  background: var(--kiwi);
  color: var(--deep);
  border-color: var(--kiwi);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  background-color: var(--deep);
  background-image: radial-gradient(circle at 78% 18%, rgba(24, 183, 106, 0.3), transparent 54%);
  color: rgba(246, 248, 244, 0.8);
}

.page-about .about-close__inner {
  max-width: 720px;
}

.page-about .about-close .eyebrow {
  margin: 0;
  color: var(--gold);
  letter-spacing: 0.18em;
}

.page-about .about-close .h-section {
  margin: 10px 0 14px;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-close p {
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-partners {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 720px) {
  .page-about .about-grid-media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

  .page-about .about-kpis {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-rail);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-offset) + 12px);
  }
}

@media (max-width: 599px) {
  .page-about .about-stream {
    --stream-pad: 20px;
    --node-size: 10px;
  }

  .page-about .about-stop::before {
    top: 22px;
  }

  .page-about .about-roster li {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .page-about .about-roster__num {
    font-size: 22px;
  }
}

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

  .page-about .about-stop:hover::before {
    transform: none;
  }
}