.page-about {
  --about-rail-w: 180px;
  --about-rail-gap: 48px;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding: 24px 0 4px;
}
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}
.page-about .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  text-decoration: underline;
}
.page-about .crumbs li[aria-current] {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 36px;
  padding-bottom: 8px;
}
.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 9.2vw, 84px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--bone);
}
.page-about .about-hero__title br {
  display: none;
}
@media (min-width: 700px) {
  .page-about .about-hero__title br {
    display: block;
  }
}
.page-about .about-hero__lede {
  max-width: 64ch;
  margin: 24px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  padding: 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-stat {
  background: var(--ink-900);
  padding: 18px 16px 20px;
}
.page-about .about-stat dt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--moss);
  letter-spacing: .04em;
}
.page-about .about-stat dd {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--orange);
}
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stat {
    padding: 22px 20px 24px;
  }
  .page-about .about-stat dd {
    font-size: 32px;
  }
}

/* ---------- 双列骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 52px;
  padding-bottom: 56px;
}
@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: var(--about-rail-gap);
    padding-top: 64px;
  }
}

.page-about .about-rail {
  display: none;
}
@media (min-width: 1000px) {
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--frame-h) + 28px);
    align-self: start;
  }
}
.page-about .about-rail__head {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--moss);
}
.page-about .about-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}
.page-about .about-rail__list li {
  margin: 0;
}
.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 8px 0 8px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--bone);
  border-left-color: var(--cyan);
  outline: none;
}
.page-about .about-rail__list a.is-on {
  color: var(--bone);
  border-left-color: var(--orange);
}
.page-about .about-rail__list .mono {
  font-size: 11px;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 56px 0 16px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--frame-h) + 20px);
}
.page-about .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-about .about-chapter__band {
  display: block;
  width: 64px;
  height: 5px;
  margin-bottom: 20px;
  background: var(--cyan);
}
.page-about .about-chapter__band--clay {
  background: var(--clay);
}
.page-about .about-chapter__band--moss {
  background: var(--moss);
}
.page-about .about-chapter__band--orange {
  background: var(--orange);
}
.page-about .about-chapter__idx {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}
.page-about .about-chapter__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.8vw, 42px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-chapter__text {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-chapter__text:last-child {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 28px 0 0;
}
.page-about .media {
  border: 1px solid var(--line);
  background: var(--ink-800);
}
.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--moss);
}

/* ---------- 01 团队 ---------- */
.page-about .about-team__top {
  display: grid;
  gap: 8px;
}
.page-about .about-team__figure {
  margin-top: 20px;
}
@media (min-width: 860px) {
  .page-about .about-team__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 36px;
    align-items: start;
  }
  .page-about .about-team__figure {
    margin-top: 4px;
  }
}

.page-about .about-table-wrap {
  margin-top: 34px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .about-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--moss);
}
.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-table thead th {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--bone);
  border-bottom-color: var(--moss);
  white-space: nowrap;
}
.page-about .about-table tbody th {
  color: var(--bone);
  font-weight: 600;
  white-space: nowrap;
}
.page-about .about-table tbody tr {
  transition: background .2s var(--ease);
}
.page-about .about-table tbody tr:hover,
.page-about .about-table tbody tr:focus-within {
  background: var(--cyan-soft);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  margin: 34px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line);
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 32px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}
.page-about .about-timeline__ver {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}
.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}
.page-about .about-timeline__item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 03 战报流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 760px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .about-step {
  background: var(--ink-800);
  padding: 22px 20px 24px;
}
.page-about .about-step__no {
  display: block;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--orange);
}
.page-about .about-step__name {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--bone);
}
.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 呼吸留白 ---------- */
.page-about .about-breath {
  height: 72px;
}
@media (min-width: 900px) {
  .page-about .about-breath {
    height: 148px;
  }
}

/* ---------- 04 资料库 ---------- */
.page-about .about-library__top {
  display: grid;
  gap: 8px;
}
.page-about .about-library__figure {
  margin-top: 20px;
}
@media (min-width: 860px) {
  .page-about .about-library__top {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
  .page-about .about-library__figure {
    margin-top: 4px;
  }
}

.page-about .about-chart {
  margin: 36px 0 0;
  padding: 22px 18px 24px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}
.page-about .about-chart__cap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--moss);
}
.page-about .about-chart__rows {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-chart__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 66px;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}
.page-about .about-chart__lab {
  color: var(--mist);
  font-size: 12px;
}
.page-about .about-chart__bar {
  display: block;
  height: 12px;
  box-sizing: border-box;
  border: 1px solid var(--line);
  background: var(--ink-900);
}
.page-about .about-chart__bar i {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  background: linear-gradient(90deg, var(--cyan), var(--moss));
  transition: width .6s var(--ease);
}
.page-about .about-chart__bar--now i {
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}
.page-about .about-chart__val {
  text-align: right;
  font-size: 12px;
  color: var(--bone);
}

/* ---------- 05 数据来源 ---------- */
.page-about .about-source__figure {
  margin-top: 32px;
}
@media (min-width: 1000px) {
  .page-about .about-source__figure {
    max-width: 900px;
  }
}

/* ---------- 06 工作原则 ---------- */
.page-about .about-creed {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 860px) {
  .page-about .about-creed {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-creed__item {
  background: var(--ink-800);
  padding: 26px 22px 28px;
}
.page-about .about-creed__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.page-about .about-creed__name {
  margin: 16px 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--bone);
}
.page-about .about-creed__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: 64px;
  padding: 34px 22px 36px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 82%);
}
@media (min-width: 760px) {
  .page-about .about-cta {
    padding: 44px 36px 46px;
  }
}
.page-about .about-cta__kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--orange);
}
.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 34px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-cta__text {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta__links .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chart__bar i,
  .page-about .about-table tbody tr,
  .page-about .about-rail__list a {
    transition: none;
  }
  .page-about .about-chart__bar i {
    width: var(--w, 0%);
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}