.page-about {
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(43, 245, 200, 0.10), transparent 62%),
    var(--ink-950);
  color: var(--ice);
  font-family: var(--font-body);
  overflow: clip;
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(18, 53, 43, 0.55) 0%, rgba(6, 17, 14, 0) 62%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(0deg, var(--line) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
  padding-block: 36px 52px;
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    padding-block: 60px 84px;
    align-items: start;
  }
}

.page-about .about-hero__brand {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 22px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.82;
  color: var(--ice-dim);
}

.page-about .about-hero__media {
  position: relative;
  margin: 30px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius) var(--radius) var(--radius) 30px;
  overflow: hidden;
  background: var(--ink-900);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-about .about-hero__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-950);
  background: var(--cyan);
}

/* ---------- 首屏右侧面板 ---------- */
.page-about .about-panel {
  padding: 22px;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius) var(--radius) var(--radius) 40px;
  background: linear-gradient(158deg, var(--ink-880), var(--ink-950) 72%);
  box-shadow:
    10px 10px 0 -1px rgba(43, 245, 200, 0.07),
    22px 22px 0 -2px rgba(43, 245, 200, 0.035);
}

@media (min-width: 920px) {
  .page-about .about-panel {
    padding: 28px;
    margin-top: 8px;
  }
}

.page-about .about-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-about .about-status__led {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 2px rgba(43, 245, 200, 0.18);
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-status__led {
    animation: about-pulse 2.4s var(--ease) infinite;
  }
}

@keyframes about-pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(43, 245, 200, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(43, 245, 200, 0.04); }
}

.page-about .about-meters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-meter {
  padding: 16px 12px;
  background: var(--ink-950);
}

.page-about .about-meter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-meter__label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.page-about .about-panel__lines {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-panel__lines li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice-dim);
}

.page-about .about-panel__lines li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 10px;
  height: 1px;
  background: var(--pulse);
}

.page-about .about-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 档案主体 ---------- */
.page-about .about-body {
  padding-block: 48px 72px;
}

@media (min-width: 1000px) {
  .page-about .about-body {
    padding-block: 84px 104px;
  }
}

.page-about .about-body__grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 1000px) {
  .page-about .about-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* 左侧索引 */
.page-about .about-rail {
  padding: 18px 18px 20px;
  border: 1px solid var(--hair);
  border-radius: var(--radius) var(--radius) var(--radius) 22px;
  background: var(--ink-900);
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  color: var(--ice);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--cyan-soft);
  border-left-color: var(--cyan);
  background: rgba(43, 245, 200, 0.06);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* 章节 */
.page-about .about-sec {
  padding-bottom: 52px;
}

.page-about .about-sec + .about-sec {
  border-top: 1px dashed var(--hair);
  padding-top: 46px;
}

.page-about .about-sec h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-text {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--ice-dim);
}

.page-about .about-text--tight {
  margin-top: 14px;
}

/* 观赛场景 */
.page-about .about-scenes {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .about-scenes li:nth-child(2) {
    margin-top: 18px;
  }
  .page-about .about-scenes li:nth-child(3) {
    margin-top: 36px;
  }
}

.page-about .about-scenes li {
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--pulse);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-about .about-scenes__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
}

.page-about .about-scenes li p:last-child {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ice-dim);
}

/* 分层索引 */
.page-about .about-layers {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--ink-900);
  border-radius: var(--radius);
}

@media (min-width: 760px) {
  .page-about .about-layer:nth-child(2) { margin-left: 16px; }
  .page-about .about-layer:nth-child(3) { margin-left: 32px; }
  .page-about .about-layer:nth-child(4) { margin-left: 48px; }
  .page-about .about-layer:nth-child(5) { margin-left: 64px; }
}

.page-about .about-layer__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .about-layer__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-layer__desc {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice-dim);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 720px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .about-team__card:nth-child(2) {
    margin-top: 20px;
  }
}

.page-about .about-team__card {
  padding: 20px 18px;
  border: 2px solid var(--line);
  border-radius: var(--radius) var(--radius) var(--radius) 24px;
  background: var(--ink-880);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease), transform 0.24s var(--ease);
}

@media (hover: hover) {
  .page-about .about-team__card:hover {
    border-color: var(--line-strong);
    background: var(--ink-800);
    transform: translateY(-3px);
  }
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__role {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pulse-soft);
}

.page-about .about-team__desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ice-dim);
}

/* 图片 */
.page-about .about-photo {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius) var(--radius) var(--radius) 26px;
  overflow: hidden;
  background: var(--ink-900);
}

.page-about .about-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 11 / 7;
  object-fit: cover;
}

.page-about .about-photo--wide img {
  aspect-ratio: 7 / 3;
}

.page-about .about-photo figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--hair);
}

/* 更新时段 */
.page-about .about-slots {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

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

.page-about .about-slot {
  display: grid;
  gap: 4px;
  padding: 16px 14px;
  background: var(--ink-900);
}

.page-about .about-slot__time {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .about-slot__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-slot__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* 纸感校验卡 */
.page-about .about-paper {
  margin-top: 22px;
  padding: 22px 20px;
  border: 2px solid var(--paper-ink);
  border-radius: var(--radius) var(--radius) var(--radius) 28px;
  background: var(--paper);
  color: var(--paper-ink);
  box-shadow: 8px 8px 0 -1px rgba(43, 245, 200, 0.16);
}

.page-about .about-paper__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-about .about-paper__body {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper-ink);
}

/* 时间轴 */
.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: 12px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 245, 200, 0.08));
}

.page-about .about-track__item {
  position: relative;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 17px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 245, 200, 0.1);
}

.page-about .about-node {
  border: 1px solid var(--line);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-about .about-node[open] {
  border-color: var(--line-strong);
  background: var(--ink-880);
}

.page-about .about-node summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--ice);
}

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

.page-about .about-node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

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

.page-about .about-node summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-node__ver {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-node__title {
  font-size: 15.5px;
  font-weight: 700;
}

.page-about .about-node__body {
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ice-dim);
}

/* 栏目 */
.page-about .about-channels {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-channel {
  padding: 8px 13px;
  border: 1px solid var(--line-strong);
  background: rgba(43, 245, 200, 0.07);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
  border-radius: var(--radius);
}

/* 收尾入口 */
.page-about .about-next {
  margin-top: 8px;
  padding-top: 36px;
  border-top: 1px solid var(--hair);
}

.page-about .about-next h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

@media (min-width: 760px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

.page-about .about-next__card {
  display: grid;
  gap: 6px;
  padding: 18px 18px 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius) var(--radius) var(--radius) 22px;
  background: var(--ink-900);
  text-decoration: none;
  color: var(--ice);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--pulse);
  background: var(--ink-850);
  transform: translateY(-2px);
}

.page-about .about-next__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pulse-soft);
}

.page-about .about-next__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-next__card {
    transition: none;
  }
  .page-about .about-team__card:hover,
  .page-about .about-next__card:hover {
    transform: none;
  }
}