.page-about {
  --about-gap: clamp(22px, 3.4vw, 52px);
  --about-body: #C4CEE0;
  background-color: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(26px, 4.5vw, 54px);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .crumbs__link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .crumbs__link:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.page-about .crumbs__item {
  color: var(--amber);
  letter-spacing: 0.14em;
}

.page-about .crumbs__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: calc(var(--header-h) + clamp(22px, 4vw, 52px)) 0 clamp(44px, 6.5vw, 88px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(47, 227, 193, 0.12), transparent 55%),
    radial-gradient(90% 70% at 0% 0%, rgba(184, 123, 18, 0.18), transparent 60%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  border-bottom: var(--rule);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 5.6vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
  max-width: 15em;
}

.page-about .about-hero__intro {
  margin-top: 22px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 展签 ---------- */
.page-about .about-plates {
  display: grid;
  border: var(--rule);
  background: rgba(18, 26, 43, 0.72);
}

.page-about .about-plate {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border-bottom: var(--rule);
}

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

.page-about .about-plate__k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-plate__v {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding-block: clamp(48px, 7vw, 96px);
}

.page-about .section--paper {
  padding-block: clamp(52px, 7.5vw, 104px);
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .section__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--mist);
}

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

.page-about .section__note {
  margin-top: 14px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .prose {
  margin-top: 24px;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .prose p + p {
  margin-top: 1.1em;
}

.page-about .section--paper .prose {
  color: #46506A;
}

/* ---------- 分栏 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-cols__aside {
  align-self: start;
}

/* ---------- 起点章节 ---------- */
.page-about .about-origin__more {
  margin-top: 30px;
  max-width: 620px;
}

.page-about .about-origin__more-label {
  font-size: 15px;
  letter-spacing: 0.02em;
}

.page-about .about-origin__more .drawer__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 团队章节 ---------- */
.page-about .about-team__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-crew {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 1px solid rgba(26, 31, 43, 0.16);
}

.page-about .about-crew__item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
  padding: 18px 16px 18px 14px;
  border-bottom: 1px solid rgba(26, 31, 43, 0.16);
  border-left: 3px solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .about-crew__item:hover,
.page-about .about-crew__item:focus-within {
  border-left-color: var(--teal);
  background-color: #FFFFFF;
}

.page-about .about-crew__num {
  font-size: 40px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-deep);
}

.page-about .about-crew__body {
  display: grid;
  gap: 6px;
}

.page-about .about-crew__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper-ink);
}

.page-about .about-crew__duty {
  font-size: 14px;
  line-height: 1.75;
  color: #5A6479;
}

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

/* ---------- 栏目索引 ---------- */
.page-about .about-index {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  border-top: var(--rule);
}

.page-about .about-index__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 24px 0 24px 14px;
  border-bottom: var(--rule);
  border-left: 2px solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-about .about-index__row:hover {
  border-left-color: var(--teal);
  background-color: rgba(18, 26, 43, 0.75);
  padding-left: 20px;
}

.page-about .about-index__num {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--amber-deep);
}

.page-about .about-index__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.25;
  color: var(--mist);
}

.page-about .about-index__text {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-index__link {
  justify-self: start;
  align-self: center;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 193, 0.4);
  padding-bottom: 3px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 互认网络 ---------- */
.page-about .about-network {
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(122, 92, 255, 0.14), transparent 60%),
    var(--ink-2);
  border-top: var(--rule);
  border-bottom: var(--rule);
}

.page-about .about-network__media {
  align-self: center;
}

/* ---------- 时间节点 ---------- */
.page-about .about-timeline-section {
  background: linear-gradient(180deg, var(--ink), var(--ink-2) 70%, var(--ink));
}

.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 42px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__nodes {
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-node {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  font: inherit;
  text-align: left;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-left: 2px solid var(--line);
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-node:hover {
  color: var(--mist);
  border-left-color: var(--teal);
}

.page-about .about-node[aria-selected="true"] {
  color: var(--mist);
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(184, 123, 18, 0.18), transparent 72%);
}

.page-about .about-node__year {
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-node__label {
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-about .about-panel {
  padding: clamp(20px, 3vw, 34px);
  border: var(--rule);
  background-color: rgba(11, 15, 26, 0.6);
}

.page-about .about-panel[hidden] {
  display: none;
}

.page-about .about-panel__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.3vw, 28px);
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-panel p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-body);
}

.page-about .about-timeline__media {
  margin-top: clamp(30px, 4.5vw, 56px);
}

/* ---------- 结尾通道 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(70% 100% at 12% 100%, rgba(184, 123, 18, 0.22), transparent 62%),
    var(--ink);
  border-top: var(--rule);
}

.page-about .about-cta__box {
  padding: clamp(26px, 4vw, 48px) clamp(20px, 3.5vw, 44px);
  border: var(--rule);
  border-left: 3px solid var(--amber);
  background-color: rgba(18, 26, 43, 0.6);
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-cta__text {
  margin: 16px 0 26px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-index__row {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: start;
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  }

  .page-about .about-cols--wide {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-timeline {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.5fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .about-team__cols {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (max-width: 719px) {
  .page-about .about-crew__item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .about-crew__num {
    font-size: 32px;
  }

  .page-about .about-plate__v {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__row,
  .page-about .about-node,
  .page-about .about-crew__item,
  .page-about .about-index__link,
  .page-about .crumbs__link {
    transition: none;
  }
}