.page-about {
  --about-grid: 72px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 4vw, 40px) 0 clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: var(--about-grid) var(--about-grid);
  opacity: 0.16;
  pointer-events: none;
}
.page-about .hero-grid {
  position: relative;
  z-index: 1;
}
.page-about .hero-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 10vw, 100px);
  line-height: 0.94;
  letter-spacing: -0.04em;
  color: var(--paper);
}
.page-about .hero-accent {
  color: var(--cyan);
}
.page-about .hero-lede {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.86;
}
.page-about .hero-meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.page-about .hero-meta-item {
  font-size: 13px;
  color: var(--slate);
  padding-right: 16px;
  margin-right: 16px;
  border-right: 1px solid var(--line);
}
.page-about .hero-meta-item:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}
.page-about .hero-meta-item .mono {
  color: var(--cyan);
  margin-right: 6px;
}
.page-about .hero-side {
  display: none;
}
.page-about .hero-figure {
  position: relative;
  margin: 26px 0 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}
.page-about .media-caption {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.02em;
}

/* ---------- 双栏骨架 ---------- */
.page-about .layout-split {
  padding-top: clamp(18px, 3vw, 34px);
}
.page-about .axis-column {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 12px;
}
.page-about .axis-head .eyebrow {
  display: block;
  margin: 0 0 6px;
}
.page-about .axis-note {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 34ch;
}
.page-about .axis-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.page-about .axis-nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.3;
  background: var(--ink-800);
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}
.page-about .axis-nav-link:hover,
.page-about .axis-nav-link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--ink-700);
}
.page-about .axis-nav-num {
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.page-about .axis-stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- 章节 ---------- */
.page-about .sec {
  padding: clamp(26px, 4vw, 48px) 0;
  border-top: 1px solid var(--line);
}
.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.page-about .sec-num {
  font-size: clamp(30px, 6vw, 56px);
  font-weight: 700;
  line-height: 0.9;
  color: var(--line);
  letter-spacing: -0.02em;
}
.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .sec .prose {
  margin-top: 16px;
  color: var(--paper);
  opacity: 0.88;
}
.page-about .sec .prose p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
}
.page-about .sec .prose p:last-child {
  margin-bottom: 0;
}
.page-about .sec .prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.page-about .sec .prose a:hover {
  color: var(--mint);
}

/* ---------- 时间线 ---------- */
.page-about .mile {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--line);
}
.page-about .mile-item {
  position: relative;
  padding: 0 0 22px 12px;
}
.page-about .mile-item:last-child {
  padding-bottom: 0;
}
.page-about .mile-item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}
.page-about .mile-year {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
  margin-bottom: 4px;
}
.page-about .mile-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .mile-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 判断轴示意 ---------- */
.page-about .axis-svg {
  display: block;
  width: 100%;
  height: auto;
  margin: 20px 0 6px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  padding: 10px 6px;
  box-sizing: border-box;
}
.page-about .axis-svg .svg-line {
  stroke: var(--line);
  stroke-width: 1.5;
}
.page-about .axis-svg .svg-tick {
  stroke: var(--line);
  stroke-width: 1;
}
.page-about .axis-svg .svg-dot {
  fill: var(--cyan);
}
.page-about .axis-svg .svg-dot-end {
  fill: var(--orange);
}
.page-about .axis-svg text {
  fill: var(--slate);
  font-family: var(--font-mono);
  font-size: 15px;
}
.page-about .axis-svg .svg-caption {
  fill: var(--line);
  font-size: 13px;
}

/* ---------- 方法清单 ---------- */
.page-about .method-list {
  list-style: none;
  margin: 18px 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .method-item {
  background: var(--ink-800);
  padding: 14px 16px;
}
.page-about .method-name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 6px;
}
.page-about .method-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.82;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  margin-top: 18px;
}
.page-about .team-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.page-about .team-chip {
  display: inline-block;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--ink-950);
  background: var(--mint);
  text-decoration: none;
  border: 1px solid var(--mint);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.page-about .team-chip:hover,
.page-about .team-chip:focus-visible {
  background: transparent;
  color: var(--mint);
}
.page-about .team-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .team-card {
  background: var(--ink-800);
  padding: 16px 16px 18px;
  border-left: 2px solid transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.page-about .team-card:hover {
  background: var(--ink-700);
  border-left-color: var(--cyan);
}
.page-about .team-card-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .team-card p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}
.page-about .team-note {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
}
.page-about .team-figure {
  margin: 18px 0 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

/* ---------- 权益表 ---------- */
.page-about .table-wrap {
  margin-top: 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--ink-800);
}
.page-about .rights-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
  border-bottom: 1px solid var(--line);
}
.page-about .rights-table th,
.page-about .rights-table td {
  padding: 13px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.65;
}
.page-about .rights-table thead th {
  background: var(--ink-700);
  color: var(--mint);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.page-about .rights-table tbody th {
  color: var(--paper);
  font-weight: 700;
  white-space: nowrap;
}
.page-about .rights-table tbody td {
  color: var(--slate);
}
.page-about .rights-table tbody tr:hover td,
.page-about .rights-table tbody tr:hover th {
  background: var(--ink-700);
  color: var(--paper);
}
.page-about .rights-table tbody tr:last-child th,
.page-about .rights-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-about .member-figure {
  margin: 20px 0 0;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

/* ---------- 里程碑数据 ---------- */
.page-about .stat-row {
  display: grid;
  gap: 1px;
  margin-top: 20px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .stat-cell {
  background: var(--ink-800);
  padding: 16px 16px 18px;
}
.page-about .stat-num {
  display: block;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  margin-bottom: 8px;
}
.page-about .stat-label {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 后续入口 ---------- */
.page-about .next-links {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .next-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink-800);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.page-about .next-link .mono {
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.08em;
}
.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  background: var(--ink-700);
  color: var(--cyan);
}
.page-about .next-link:hover .mono,
.page-about .next-link:focus-visible .mono {
  color: var(--cyan);
}

/* ---------- 收束 ---------- */
.page-about .closing {
  margin: clamp(28px, 4vw, 48px) 0 clamp(20px, 3vw, 40px);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background:
    linear-gradient(120deg, var(--ink-800) 0%, var(--ink-900) 70%);
}
.page-about .closing-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .closing-text {
  margin: 12px 0 20px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}
.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 图片通用 ---------- */
.page-about img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .method-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .stat-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .next-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 24px;
  }
  .page-about .hero-side {
    display: block;
    writing-mode: vertical-rl;
    margin: 0;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32em;
    color: var(--line);
  }
  .page-about .hero-figure {
    margin-top: 32px;
    aspect-ratio: 21 / 9;
  }
  .page-about .axis-column {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 0 20px 0 0;
    margin-bottom: 0;
  }
  .page-about .axis-nav-list {
    display: block;
  }
  .page-about .axis-nav-list li + li {
    margin-top: 2px;
  }
  .page-about .axis-nav-link {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px 8px 12px;
  }
  .page-about .axis-nav-link:hover,
  .page-about .axis-nav-link:focus-visible {
    border-left-color: var(--cyan);
    background: var(--ink-800);
  }
  .page-about .sec:first-child {
    border-top: 0;
    padding-top: 0;
  }
  .page-about .sec-head {
    gap: 20px;
  }
  .page-about .team-figure {
    aspect-ratio: 21 / 9;
  }
  .page-about .next-links {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-about .stat-row {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .closing {
    padding: 40px 44px;
  }
}
<<<END>>>