.page-about {
  --about-tint: rgba(15, 36, 48, .62);
  --about-line-soft: var(--line-soft);
  background:
    radial-gradient(1020px 520px at 88% -6%, rgba(47, 224, 200, .07), transparent 62%),
    radial-gradient(760px 440px at -6% 16%, rgba(255, 162, 58, .055), transparent 60%),
    var(--ink-900);
  color: var(--body-text);
  overflow-x: hidden;
  padding-bottom: 0;
}

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

.page-about .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 28px 0 56px;
  border-bottom: 1px solid var(--line-print);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__lead {
  display: grid;
  gap: 18px;
  max-width: 46rem;
}

.page-about .about-hero__lede {
  max-width: 36em;
  color: var(--body-text);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-print);
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: minmax(74px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--accent-amber);
  line-height: 1.1;
}

.page-about .about-facts li:nth-child(even) .about-facts__num {
  color: var(--accent-cyan);
}

.page-about .about-facts__label {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 44px 0 76px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(260px, .85fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-facts {
    border-top-color: var(--line-amber);
  }
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  border-bottom: 1px solid var(--line-print);
  background: linear-gradient(180deg, rgba(15, 36, 48, .72), rgba(8, 19, 31, .4));
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index__list a {
  display: inline-block;
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a[data-current="true"] {
  color: var(--accent-amber);
  border-color: var(--line-amber);
  background: rgba(255, 162, 58, .08);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 54px 0;
  border-bottom: 1px solid var(--line-print);
}

.page-about [data-section] {
  scroll-margin-top: 96px;
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  max-width: 42em;
  margin-bottom: 32px;
}

.page-about .about-chapter__lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-subhead {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: var(--white);
  margin: 0 0 12px;
}

@media (min-width: 960px) {
  .page-about .about-chapter {
    padding: 82px 0;
  }

  .page-about .about-chapter__head {
    margin-bottom: 48px;
  }
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 28px;
}

.page-about .about-origin p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  max-width: 38em;
}

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

.page-about .about-sheet {
  position: relative;
  background: linear-gradient(180deg, var(--panel-800), rgba(15, 36, 48, .58));
  border: 1px solid var(--line-print);
  border-left: 3px solid var(--accent-amber);
  padding: 22px 20px;
}

.page-about .about-sheet--stacked::after {
  content: "";
  position: absolute;
  inset: 9px -9px -9px 9px;
  border: 1px solid var(--line-soft);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-origin .about-sheet {
  z-index: 1;
}

.page-about .about-origin__col {
  border-top: 1px solid var(--line-print);
  padding-top: 22px;
}

.page-about .about-origin__col p {
  color: var(--body-text);
}

@media (min-width: 960px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .95fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-origin__col {
    border-top: 0;
    border-left: 1px solid var(--line-print);
    padding-top: 0;
    padding-left: 32px;
  }
}

/* ---------- 02 编号 ---------- */
.page-about .about-code-layout {
  display: grid;
  gap: 34px;
}

.page-about .about-code {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-code__seg {
  flex: 1 1 150px;
  min-width: 130px;
  display: grid;
  gap: 7px;
  padding: 16px 16px 18px;
  background: linear-gradient(180deg, var(--panel-800), rgba(15, 36, 48, .38));
  border: 1px solid var(--line-print);
}

.page-about .about-code__seg:nth-child(1) {
  border-top: 3px solid var(--accent-amber);
}

.page-about .about-code__seg:nth-child(2) {
  border-top: 3px solid var(--accent-cyan);
}

.page-about .about-code__seg:nth-child(3) {
  border-top: 3px solid var(--wine-700);
}

.page-about .about-code__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-code__seg:nth-child(1) .about-code__key {
  color: var(--accent-amber);
}

.page-about .about-code__seg:nth-child(2) .about-code__key {
  color: var(--accent-cyan);
}

.page-about .about-code__seg:nth-child(3) .about-code__key {
  color: #D9809C;
}

.page-about .about-code__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 42px);
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1;
  color: var(--white);
}

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

.page-about .about-cases {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-print);
  border: 1px solid var(--line-print);
}

.page-about .about-case {
  background: var(--ink-900);
  padding: 16px 18px;
  display: grid;
  gap: 7px;
}

.page-about .about-case__meter {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-case__code {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--accent-cyan);
}

.page-about .about-case p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text);
  max-width: 40em;
}

.page-about .about-code-layout__figure {
  margin: 0;
}

@media (min-width: 960px) {
  .page-about .about-code-layout {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 320px);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 03 版本 ---------- */
.page-about .about-ver__figure {
  margin: 0 0 36px;
  border: 1px solid var(--line-print);
  background: var(--panel-800);
}

.page-about .about-ver__figure .figure__media {
  overflow: hidden;
}

.page-about .about-ver__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 1px solid rgba(47, 224, 200, .35);
  display: grid;
  gap: 30px;
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--accent-cyan);
  border-radius: 50%;
  background: var(--ink-900);
}

.page-about .about-timeline__node:first-child::before {
  border-color: var(--accent-amber);
  background: var(--accent-amber);
}

.page-about .about-timeline__ver {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--white);
  line-height: 1.2;
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--accent-cyan);
  margin-top: 1px;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--white);
  margin: 12px 0 8px;
  line-height: 1.35;
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text);
  max-width: 34em;
}

@media (min-width: 880px) {
  .page-about .about-timeline__list {
    padding: 0;
    border-left: 0;
    border-top: 1px solid rgba(47, 224, 200, .35);
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-timeline__node {
    padding: 30px 24px 0 0;
    border-right: 1px solid var(--line-soft);
  }

  .page-about .about-timeline__node:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .about-timeline__node::before {
    left: 0;
    top: -8px;
  }

  .page-about .about-timeline__node p {
    max-width: 22em;
  }
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 34px;
}

.page-about .about-team__roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-print);
  border: 1px solid var(--line-print);
}

.page-about .about-team__roster li {
  background: var(--panel-800);
  padding: 18px 18px 20px;
  display: grid;
  grid-template-columns: minmax(58px, auto) minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 4px;
  align-items: baseline;
}

.page-about .about-team__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1;
  color: var(--accent-amber);
}

.page-about .about-team__roster li:nth-child(2) .about-team__num {
  color: var(--accent-cyan);
}

.page-about .about-team__roster li:nth-child(3) .about-team__num {
  color: #D9809C;
}

.page-about .about-team__role {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--white);
  line-height: 1.3;
}

.page-about .about-team__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-flow {
  border: 1px solid var(--line-print);
  border-top: 3px solid var(--indigo-600);
  background: linear-gradient(180deg, rgba(42, 46, 92, .28), rgba(15, 36, 48, .35));
  padding: 20px 18px 22px;
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  counter-reset: about-flow;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__steps li {
  counter-increment: about-flow;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--body-text);
}

.page-about .about-flow__steps li::before {
  content: counter(about-flow, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--accent-cyan);
  padding-top: 3px;
}

@media (min-width: 960px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
    gap: 40px;
    align-items: start;
  }
}

/* ---------- 05 供稿 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .about-partners li {
  border-top: 1px solid var(--line-print);
  padding-top: 18px;
}

.page-about .about-partners h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.35;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-partners h3::before {
  content: "[ 供稿要求 ] ";
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--accent-cyan);
  display: block;
  margin-bottom: 6px;
}

.page-about .about-partners p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
  max-width: 40em;
}

@media (min-width: 860px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 36px;
  }
}

/* ---------- 06 兰州 ---------- */
.page-about .about-place {
  position: relative;
  overflow: hidden;
  border-bottom: 0;
}

.page-about .about-place__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-place__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
}

.page-about .about-place__inner {
  position: relative;
  z-index: 1;
}

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

.page-about .about-place__grid > div p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  max-width: 38em;
}

.page-about .about-place__grid > div p:last-child {
  margin-bottom: 0;
}

.page-about .about-place__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-print);
  background: rgba(8, 19, 31, .72);
}

.page-about .about-place__facts li {
  display: grid;
  grid-template-columns: minmax(96px, auto) minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .about-place__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .about-place__val {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--white);
  letter-spacing: .01em;
}

.page-about .about-place__val a {
  color: var(--accent-amber);
  text-decoration: none;
  border-bottom: 1px solid var(--line-amber);
}

.page-about .about-place__val a:hover {
  color: var(--accent-amber-soft);
}

@media (min-width: 960px) {
  .page-about .about-place__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 结尾入口 ---------- */
.page-about .about-next {
  padding: 54px 0 78px;
}

.page-about .about-next__heading {
  margin: 10px 0 24px;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-print);
  border: 1px solid var(--line-print);
}

.page-about .about-next__list a {
  display: grid;
  gap: 7px;
  padding: 18px 18px 20px;
  background: var(--panel-800);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  background: var(--panel-750);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--white);
  line-height: 1.3;
}

.page-about .about-next__title::after {
  content: " →";
  color: var(--accent-amber);
  font-weight: 500;
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-next {
    padding: 76px 0 104px;
  }
}
</>