.page-about {
  display: block;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about p {
  margin: 0;
}

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

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

/* 首屏 */
.page-about .about-hero {
  padding: 24px 0 0;
}

.page-about .about-hero__title {
  margin: 10px 0 14px;
  font-size: clamp(27px, 6.4vw, 44px);
  line-height: 1.16;
  text-shadow: 0 0 18px rgba(108, 43, 217, 0.45);
}

.page-about .about-hero__lead .lead {
  max-width: 60ch;
  color: var(--ink-dim);
}

.page-about .about-hero__actions {
  margin-top: 18px;
  gap: 12px;
}

.page-about .about-hero__stat {
  margin-top: 20px;
  padding: 20px 18px;
  border-radius: var(--radius);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(245, 243, 255, 0.82);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid rgba(232, 230, 242, 0.24);
  border-radius: var(--radius-sm);
  background: rgba(11, 7, 20, 0.42);
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .about-stats__cap {
  font-size: 12px;
  color: var(--ink-dim);
}

.page-about .about-hero__media {
  margin-top: 20px;
}

/* 目录索引条 */
.page-about .about-index {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  display: flex;
  gap: 8px;
  margin: 26px 0 0;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
  background: linear-gradient(180deg, rgba(11, 7, 20, 0.97), rgba(11, 7, 20, 0.84));
  border-bottom: 1px solid var(--line);
}

.page-about .about-index::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur), border-color var(--dur), background var(--dur);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink);
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
}

/* 区块通用 */
.page-about .about-section {
  padding-top: 42px;
  scroll-margin-top: calc(var(--header-h) + 56px);
}

.page-about .about-section--last {
  padding-bottom: 12px;
}

.page-about .about-head {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

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

.page-about .about-head h2 {
  font-size: clamp(21px, 4.8vw, 32px);
  line-height: 1.24;
  max-width: 34ch;
}

.page-about .about-head > p:last-child:not(.about-head__no) {
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .prose {
  max-width: 64ch;
}

.page-about .prose p {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-about .prose p + p {
  margin-top: 12px;
}

.page-about .about-slash {
  height: 9px;
  margin-top: 40px;
  background: linear-gradient(90deg, var(--violet), var(--cyan) 52%, var(--orange));
  clip-path: polygon(0 74%, 100% 0, 100% 42%, 0 100%);
  opacity: 0.55;
}

/* 01 概览 */
.page-about .about-cols {
  display: grid;
  gap: 18px;
}

.page-about .about-scene {
  display: grid;
  gap: 8px;
}

.page-about .callout__title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-scene__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* 02 三条主线 */
.page-about .about-lines {
  display: grid;
  gap: 16px;
}

.page-about .about-line {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 18px 20px 24px;
  overflow: hidden;
}

.page-about .about-line::after {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  background: var(--violet);
}

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

.page-about .about-line--c::after {
  background: var(--orange);
}

.page-about .about-line__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
}

.page-about .about-line h3 {
  font-size: 19px;
  line-height: 1.35;
}

.page-about .about-line p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .about-line__meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cyan);
}

.page-about .about-line__link {
  margin-top: auto;
  padding-top: 6px;
}

.page-about .about-line__link a {
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--violet);
  padding-bottom: 2px;
  transition: color var(--dur), border-color var(--dur);
}

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

/* 03 团队 */
.page-about .about-team {
  display: grid;
  gap: 18px;
}

.page-about .about-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-console);
}

.page-about .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .data-table th,
.page-about .data-table td {
  padding: 14px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  line-height: 1.65;
  color: var(--ink-dim);
}

.page-about .data-table tbody tr:last-child th,
.page-about .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .data-table thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  background: rgba(108, 43, 217, 0.14);
}

.page-about .data-table tbody tr {
  transition: background var(--dur);
}

.page-about .data-table tbody tr:hover {
  background: rgba(108, 43, 217, 0.18);
}

.page-about .data-table td:first-child {
  color: var(--ink);
  font-weight: 700;
}

.page-about .data-table td.mono {
  font-family: var(--font-mono);
  color: var(--cyan);
  white-space: nowrap;
}

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

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* 04 时间轴 */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--violet), var(--cyan));
  box-shadow: 0 0 14px rgba(108, 43, 217, 0.55);
}

.page-about .about-stage {
  position: relative;
  padding: 18px 16px;
  display: grid;
  gap: 8px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 26px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.14), 0 0 12px rgba(0, 229, 255, 0.85);
}

.page-about .about-stage__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-stage__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-stage h3 {
  font-size: 18px;
}

.page-about .about-stage p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .about-timeline__figure {
  margin-top: 20px;
}

/* 05 质量 */
.page-about .about-quality ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-quality li {
  position: relative;
  padding: 16px 16px 16px 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-console);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
  transition: border-color var(--dur), transform var(--dur);
}

.page-about .about-quality li::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 23px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.7);
}

.page-about .about-quality li:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-quality strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-quality__tail {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .about-quality__tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

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

/* 06 接下来 */
.page-about .about-next {
  display: grid;
  gap: 18px;
}

.page-about .about-next__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 16px 16px 16px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: var(--radius-sm);
  background: var(--bg-console);
  transition: border-color var(--dur), transform var(--dur);
}

.page-about .about-next__list li:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-about .about-next__list li:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .about-next__list li:hover {
  transform: translateY(-2px);
}

.page-about .about-next__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-next h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.page-about .about-next__list p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .about-next__cta {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 22px 18px;
}

.page-about .about-next__cta h3 {
  font-size: 20px;
  line-height: 1.35;
}

.page-about .about-next__cta p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-about .about-next__cta .cluster {
  gap: 12px;
  margin-top: 4px;
}

/* 平板与桌面 */
@media (min-width: 760px) {
  .page-about .about-section {
    padding-top: 56px;
  }

  .page-about .about-lines {
    grid-template-columns: 5fr 4fr 3fr;
    align-items: start;
  }

  .page-about .about-lines .about-line:first-child {
    padding-top: 28px;
    padding-bottom: 28px;
  }

  .page-about .about-stage:nth-child(even) {
    margin-left: 44px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-hero__top {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 22px;
    align-items: stretch;
  }

  .page-about .about-hero__stat {
    margin-top: 8px;
    align-self: start;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 22px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 22px;
    align-items: start;
  }

  .page-about .about-timeline {
    padding-left: 40px;
  }

  .page-about .about-timeline::before {
    left: 11px;
  }

  .page-about .about-stage {
    padding: 20px 22px;
  }

  .page-about .about-stage::before {
    left: -35px;
  }

  .page-about .about-next {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 22px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-quality li,
  .page-about .about-next__list li,
  .page-about .data-table tbody tr,
  .page-about .about-line__link a {
    transition: none;
  }

  .page-about .about-quality li:hover,
  .page-about .about-next__list li:hover {
    transform: none;
  }
}