.page-about {
  --about-rail-w: 128px;
  --about-gap: 30px;
  --about-shell-gap: 44px;
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 8px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 34px 0 0;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-hero__body {
  max-width: 62ch;
}

.page-about .about-eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-about .about-h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(34px, 8.4vw, 74px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .about-lead {
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-hero__facts li {
  background: var(--ink-800);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background var(--ease);
}

.page-about .about-hero__facts li:hover {
  background: var(--ink-700);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.4vw, 44px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--amber);
}

.page-about .about-hero__key {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-band {
  margin-top: 46px;
  height: 5px;
  border-radius: 999px;
  background: repeating-linear-gradient(
    115deg,
    var(--cyan) 0 22px,
    transparent 22px 52px
  );
  opacity: .55;
}

/* ---------- 左侧竖栏 ---------- */
.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 4px;
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-rail__text {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--text-dim);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: 66px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(27px, 5.6vw, 50px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
}

.page-about .about-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-p {
  max-width: 42ch;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.88;
  color: var(--text-dim);
}

.page-about .about-p strong {
  color: var(--text);
  font-weight: 700;
  background-image: linear-gradient(transparent 64%, rgba(255, 176, 32, .3) 64%);
  background-repeat: no-repeat;
}

/* ---------- 要点列表 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-points li {
  background: var(--ink-800);
  padding: 20px 20px;
  display: grid;
  gap: 8px;
  transition: background var(--ease);
}

.page-about .about-points li:hover {
  background: var(--ink-700);
}

.page-about .about-points strong {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-points span {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: 32px 0 0;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
}

/* ---------- 岗位表 ---------- */
.page-about .about-tablewrap {
  margin: 6px 0 24px;
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-table__cap {
  text-align: left;
  padding: 16px 20px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--text-dim);
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  transition: background var(--ease), color var(--ease);
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--text-dim);
  border-bottom-color: var(--line);
}

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

.page-about .about-table tbody td:first-child {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .about-table tbody td:last-child {
  color: var(--text-dim);
  line-height: 1.75;
}

.page-about .about-table tbody tr:hover td {
  background: var(--ink-700);
}

.page-about .about-table__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.2;
  color: var(--amber);
}

/* ---------- 折叠面板 ---------- */
.page-about .about-folds {
  margin-top: 8px;
  display: grid;
  gap: 10px;
}

.page-about .about-fold__sum {
  cursor: pointer;
  list-style: none;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition: border-color var(--ease), background var(--ease), color var(--ease);
}

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

.page-about .about-fold__sum::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-left: 12px;
}

.page-about .ly-fold[open] .about-fold__sum {
  border-color: var(--cyan);
  background: var(--ink-700);
}

.page-about .ly-fold[open] .about-fold__sum::after {
  content: "−";
  color: var(--amber);
}

.page-about .about-fold__sum:hover {
  border-color: var(--cyan-bright);
}

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

.page-about .about-fold__body {
  padding: 16px 20px 20px;
  border: 1px solid var(--line-soft);
  border-top: 0;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  background: var(--ink-800);
}

.page-about .about-fold__body p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 版本节奏轴 ---------- */
.page-about .about-axis {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-axis__item {
  position: relative;
  padding: 0 0 30px 30px;
  border-left: 1px solid var(--line);
  transition: border-color var(--ease);
}

.page-about .about-axis__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  border-radius: 2px;
  transform: rotate(45deg);
  transition: background var(--ease), border-color var(--ease);
}

.page-about .about-axis__item:hover::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-axis__when {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-axis__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-axis__text {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 规模数字 ---------- */
.page-about .about-figures {
  list-style: none;
  margin: 26px 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-figure {
  padding: 22px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background:
    linear-gradient(160deg, rgba(31, 227, 192, .07), transparent 62%),
    var(--ink-800);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .about-figure:hover {
  border-color: var(--cyan);
}

.page-about .about-figure__v {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--amber);
}

.page-about .about-figure__k {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-section--end {
  padding-bottom: 92px;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-cta__link {
  font-size: 15px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 227, 192, .4);
  padding-bottom: 2px;
  transition: color var(--ease), border-color var(--ease);
}

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

/* ---------- 动效降级 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 1ms !important;
  }
}

/* ---------- 平板 / 桌面 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__grid {
    gap: 34px;
  }

  .page-about .about-section {
    padding: 82px 0;
  }

  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 0;
  }

  .page-about .about-hero__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-shell-gap);
    align-items: start;
  }

  .page-about .about-rail__text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .42em;
    padding-top: 6px;
  }

  .page-about .about-rail--hero .about-rail__text {
    color: var(--text-dim);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-space) + 18px);
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about .about-section__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-shell-gap);
    align-items: start;
  }

  .page-about .about-section {
    padding: 96px 0;
  }

  .page-about .about-band {
    margin-top: 58px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__body {
    max-width: 46ch;
  }

  .page-about .about-rail__no {
    font-size: 14px;
  }
}
<<<END>>>