.page-about {
  --about-index-w: 196px;
  --about-shadow: 14px 14px 0 -1px var(--stand);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(56px, 9vw, 112px) 0 clamp(26px, 4vw, 44px);
  background: linear-gradient(172deg, var(--stand) 0%, var(--stand) 42%, var(--ink) 88%);
  border-bottom: 1px solid var(--grid);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 59, 51, 0.6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 51, 0.6) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(120% 92% at 72% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 92% at 72% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .eyebrow {
  margin: clamp(16px, 3vw, 28px) 0 0;
}
.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 6.4vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--text);
  max-width: 18ch;
}
.page-about .about-lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 66ch;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.9;
  color: var(--text);
}
.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-about .about-hero__facts li {
  background: var(--ink);
  padding: 14px 16px;
}
.page-about .about-hero__facts .num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  color: var(--lime);
  line-height: 1.2;
}
.page-about .about-hero__facts .label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 壳体与索引 ---------- */
.page-about .about-shell {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 40px) var(--gutter) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(8px, 3vw, 48px);
  align-items: start;
}
.page-about .about-index {
  min-width: 0;
}
.page-about .about-index__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.page-about .about-index__link .mono {
  font-size: 11px;
  color: var(--lime-dim);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--text);
  border-color: var(--lime-dim);
  background: rgba(200, 255, 61, 0.08);
  outline: none;
}

/* ---------- 章节通用 ---------- */
.page-about .about-canvas {
  min-width: 0;
}
.page-about .about-section {
  padding: clamp(28px, 5vw, 52px) 0;
  border-top: 1px solid var(--grid);
}
.page-about .about-section:first-child {
  border-top: 0;
  padding-top: clamp(16px, 3vw, 28px);
}
.page-about .about-section--panel {
  background: var(--stand);
  border: 1px solid var(--grid);
  padding: clamp(22px, 4vw, 40px);
  margin: clamp(20px, 4vw, 40px) 0;
}
.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-kicker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--grid);
}
.page-about .about-title {
  margin: 0 0 clamp(14px, 2.4vw, 20px);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--text);
}
.page-about .about-intro {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 62ch;
}
.page-about .about-intro a,
.page-about .about-note a,
.page-about .about-sheet a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
}
.page-about .about-intro a:hover,
.page-about .about-note a:hover,
.page-about .about-sheet a:hover {
  color: var(--lime-dim);
}
.page-about .about-body p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text);
  max-width: 64ch;
}
.page-about .about-body p:last-child {
  margin-bottom: 0;
}
.page-about .about-note {
  margin: clamp(16px, 3vw, 24px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--lime-dim);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(20px, 3.4vw, 30px) 0;
  border: 1px solid var(--grid);
  background: var(--stand);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}
.page-about .about-figure--wide img {
  aspect-ratio: 3 / 2;
}
.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 三要点 ---------- */
.page-about .about-points {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-about .about-point {
  background: var(--ink);
  padding: 16px 18px;
}
.page-about .about-point__no {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}
.page-about .about-point h3 {
  margin: 6px 0 6px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}
.page-about .about-point p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 服务条目 ---------- */
.page-about .about-services {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-about .about-service {
  background: var(--ink);
  padding: clamp(16px, 2.6vw, 22px);
}
.page-about .about-service__name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
}
.page-about .about-service p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 表格 ---------- */
.page-about .about-table-wrap {
  margin: clamp(18px, 3vw, 26px) 0 0;
  overflow-x: auto;
  border: 1px solid var(--grid);
}
.page-about .about-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 13.5px;
}
.page-about .about-table caption {
  text-align: left;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  border-bottom: 1px solid var(--grid);
}
.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--grid);
  vertical-align: top;
  line-height: 1.7;
}
.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-about .about-table tbody th {
  font-weight: 600;
  color: var(--lime);
  white-space: nowrap;
}
.page-about .about-table tbody td {
  color: var(--text);
}
.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-about .about-table tbody tr:hover {
  background: rgba(200, 255, 61, 0.07);
}

/* ---------- 版本演进 ---------- */
.page-about .about-version-visual {
  position: relative;
  margin: clamp(18px, 3vw, 26px) 0 0;
  border: 1px solid var(--grid);
  overflow: hidden;
}
.page-about .about-version-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
  filter: saturate(0.85);
}
.page-about .about-version-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 15, 13, 0.12) 0%, rgba(10, 15, 13, 0.86) 100%);
  pointer-events: none;
}
.page-about .about-version-visual__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 1;
  display: inline-block;
  padding: 7px 10px;
  background: rgba(10, 15, 13, 0.82);
  border: 1px solid var(--lime-dim);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lime);
}
.page-about .about-timeline {
  list-style: none;
  margin: clamp(20px, 3.4vw, 30px) 0 0;
  padding: 0 0 0 22px;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--lime-dim) 22%, var(--grid) 100%);
  transform: skewX(-6deg);
  transform-origin: top;
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(20px, 3.4vw, 30px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: -22px;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--ink);
  border: 2px solid var(--lime);
  transform: rotate(45deg);
}
.page-about .about-timeline__code {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}
.page-about .about-timeline__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 2.6vw, 1.24rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.35;
  color: var(--text);
}
.page-about .about-timeline__item > p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 62ch;
}
.page-about .about-toggle {
  display: inline-block;
  padding: 8px 13px;
  background: transparent;
  border: 1px solid var(--grid);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.page-about .about-toggle:hover,
.page-about .about-toggle:focus-visible {
  background: rgba(200, 255, 61, 0.1);
  border-color: var(--lime-dim);
  outline: none;
}
.page-about .about-toggle[aria-expanded="true"] {
  background: rgba(200, 255, 61, 0.14);
  border-color: var(--lime);
  color: var(--lime);
}
.page-about .about-toggle__panel {
  margin-top: 12px;
  padding: 13px 15px;
  border-left: 2px solid var(--lime-dim);
  background: var(--stand);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--text);
  max-width: 62ch;
}

/* ---------- 团队数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-about .about-stat {
  background: var(--ink);
  padding: clamp(14px, 2.4vw, 20px);
}
.page-about .about-stat--accent {
  background: linear-gradient(160deg, rgba(200, 255, 61, 0.14), rgba(14, 31, 24, 0.9));
}
.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.4vw, 2.2rem);
  line-height: 1;
  color: var(--lime);
}
.page-about .about-stat__label {
  margin: 8px 0 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
}
.page-about .about-stat__desc {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-about .about-honor {
  background: var(--ink);
  padding: clamp(16px, 2.6vw, 22px);
  transition: background 0.18s ease;
}
.page-about .about-honor:hover {
  background: rgba(200, 255, 61, 0.05);
}
.page-about .about-honor h3 {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.35;
  color: var(--text);
}
.page-about .about-honor p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 纸张联系区 ---------- */
.page-about .about-sheet {
  position: relative;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: clamp(20px, 3.6vw, 34px);
  background: var(--paper);
  color: var(--ink-on-paper);
  box-shadow: var(--about-shadow);
  border-top: 6px solid var(--lime);
}
.page-about .about-sheet__lede {
  margin: 0 0 clamp(16px, 2.6vw, 22px);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-on-paper);
  max-width: 58ch;
}
.page-about .about-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--paper-shadow);
  border: 1px solid var(--paper-shadow);
}
.page-about .about-contact__item {
  background: var(--paper);
  padding: 12px 14px;
}
.page-about .about-contact__label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grid);
}
.page-about .about-contact__value {
  display: block;
  margin-top: 5px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-on-paper);
  word-break: break-word;
}
.page-about .about-sheet__foot {
  margin: clamp(16px, 2.6vw, 22px) 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-on-paper);
}
.page-about .about-sheet a {
  color: var(--ink-on-paper);
  border-bottom: 1px solid var(--lime-dim);
}

/* ---------- 行动条 ---------- */
.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3.4vw, 30px) 0 0;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-contact__item--wide {
    grid-column: span 2;
  }
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-honor:last-child {
    grid-column: span 2;
  }
}

@media (min-width: 760px) {
  .page-about .about-services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-service:last-child {
    grid-column: span 2;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 64px);
  }
  .page-about .about-index {
    position: sticky;
    top: 88px;
    align-self: start;
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--grid);
  }
  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    font-size: 13px;
    white-space: normal;
  }
  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--lime);
    background: linear-gradient(90deg, rgba(200, 255, 61, 0.12), transparent 88%);
  }
  .page-about .about-hero h1 {
    max-width: 22ch;
  }
  .page-about .about-body p {
    font-size: 15.5px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-services {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-service:last-child {
    grid-column: span 2;
  }
  .page-about .about-honors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-honor:last-child {
    grid-column: span 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-toggle,
  .page-about .about-honor {
    transition: none;
  }
}
<<<END>>>