.page-about {
  --about-rail: 268px;
  --about-edge: clamp(1.15rem, 4vw, 2.5rem);
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-block: 1.25rem clamp(2.5rem, 6vw, 4.5rem);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(244, 239, 230, 0.05) 0 1px, transparent 1px 96px),
    radial-gradient(120% 90% at 88% 6%, rgba(184, 115, 51, 0.24), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--about-edge);
}

.page-about .about-crumbs {
  padding-block: 0.6rem 1.5rem;
  font-size: 0.8rem;
  color: rgba(244, 239, 230, 0.6);
}

.page-about .about-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.page-about .about-crumbs .crumbs__item {
  color: rgba(244, 239, 230, 0.62);
  text-decoration: none;
}

.page-about .about-crumbs a.crumbs__item:hover {
  color: var(--amber);
}

.page-about .about-crumbs .crumbs__item[aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--copper);
}

.page-about .about-hero h1 {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.3rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: 1.1rem 0 0;
  font-size: clamp(0.96rem, 2vw, 1.06rem);
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-ghost-btn {
  border: 1px solid rgba(244, 239, 230, 0.38);
  background: transparent;
  color: var(--paper);
}

.page-about .about-ghost-btn:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.page-about .about-hero__panel {
  display: grid;
  gap: 1.1rem;
  padding: clamp(1.2rem, 3vw, 1.75rem);
  border: 1px solid rgba(244, 239, 230, 0.18);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(244, 239, 230, 0.08), rgba(8, 37, 31, 0.55));
}

.page-about .about-stamp {
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  text-align: center;
  border: 2px solid var(--seal);
  border-radius: 50%;
  box-shadow: inset 0 0 0 4px rgba(158, 75, 63, 0.28);
  transform: rotate(-8deg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: rgba(244, 239, 230, 0.92);
}

.page-about .about-figs {
  display: grid;
  gap: 0.8rem;
  margin: 0;
}

.page-about .about-figs > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed rgba(244, 239, 230, 0.16);
}

.page-about .about-figs > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-figs dt {
  font-size: 0.79rem;
  color: rgba(244, 239, 230, 0.62);
}

.page-about .about-figs dd {
  margin: 0;
  font-size: 1.32rem;
  font-weight: 600;
  color: var(--paper);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-body {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(1.75rem, 4.5vw, 3.25rem) var(--about-edge) clamp(2.5rem, 6vw, 4.5rem);
  display: grid;
  gap: clamp(1.35rem, 3vw, 2.25rem);
}

.page-about .about-rail__title {
  margin: 0 0 0.7rem;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .about-toc ol {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-toc a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: var(--paper-warm);
  color: var(--text-soft);
  font-size: 0.84rem;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-toc__num {
  font-size: 0.7rem;
  color: var(--copper);
}

.page-about .about-toc a[aria-current="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .about-toc a[aria-current="true"] .about-toc__num {
  color: var(--amber);
}

.page-about .about-scale {
  display: none;
}

.page-about .about-rail {
  align-self: start;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-block: clamp(1.4rem, 3.2vw, 2.2rem);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-main > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__num {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding-bottom: 0.15rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--copper);
  border-bottom: 2px solid var(--copper);
}

.page-about .about-sec h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-sec p {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--text-soft);
}

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

/* ---------- 主张要点 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-points li {
  padding: 1rem 1.05rem;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .about-points__num {
  display: block;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-about .about-points h3 {
  margin: 0.35rem 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-points p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.72;
}

/* ---------- 五步流程 ---------- */
.page-about .about-flow__track {
  margin: 1.1rem 0 1.2rem;
}

.page-about .about-flow__svg {
  display: none;
  width: 100%;
  height: auto;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-flow__card {
  position: relative;
  padding: 0.95rem 0.95rem 1.05rem;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-flow__card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  border-radius: var(--pill);
  background: linear-gradient(var(--copper), rgba(184, 115, 51, 0.15));
}

.page-about .about-flow__num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.72rem;
}

.page-about .about-flow__card h3 {
  margin: 0.6rem 0 0.32rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow__card p {
  margin: 0 0 0.6rem;
  font-size: 0.83rem;
  line-height: 1.68;
}

.page-about .about-flow__out {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  margin: 0;
  font-size: 0.76rem;
  color: var(--muted);
}

.page-about .about-flow__out .tag {
  flex: none;
}

.page-about .about-figure {
  margin: 1.3rem 0 0;
}

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

/* ---------- 版本编号（深色区） ---------- */
.page-about .about-sec--ink {
  margin-block: 0.6rem;
  padding: clamp(1.35rem, 3.6vw, 2.2rem);
  border-top: 0;
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-sec--ink h2 {
  color: var(--paper);
}

.page-about .about-sec--ink p {
  color: rgba(244, 239, 230, 0.8);
}

.page-about .about-sec--ink .about-sec__num {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-vcode {
  margin: 0.4rem 0 1.1rem;
  font-size: clamp(1.5rem, 6vw, 2.3rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-tablecard {
  margin-top: 0.2rem;
  padding: 0.3rem;
  border-radius: var(--radius-md);
  background: var(--paper-warm);
  color: var(--text);
  overflow-x: auto;
}

.page-about .about-rhythm {
  display: grid;
  gap: 0.6rem;
  margin: 1.1rem 0 0;
}

.page-about .about-rhythm > div {
  padding: 0.85rem 1rem;
  border: 1px dashed rgba(244, 239, 230, 0.24);
  border-radius: var(--radius-md);
}

.page-about .about-rhythm dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-rhythm dd {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(244, 239, 230, 0.88);
}

.page-about .about-vx {
  margin-top: 1.1rem;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(244, 239, 230, 0.22);
  border-radius: var(--radius-md);
}

.page-about .about-vx summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--paper);
}

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

.page-about .about-vx summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--amber);
}

.page-about .about-vx[open] summary::after {
  content: "–";
}

.page-about .about-vx ul {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-vx li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.84rem;
  line-height: 1.68;
  color: rgba(244, 239, 230, 0.8);
}

.page-about .about-vx li span {
  flex: none;
  font-size: 0.78rem;
  color: var(--amber);
}

.page-about .about-seal-figure {
  margin: 1.2rem 0 0;
  width: min(100%, 240px);
}

.page-about .about-seal-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* ---------- 时间轴 ---------- */
.page-about .about-time {
  list-style: none;
  position: relative;
  margin: 1.25rem 0 0;
  padding: 0;
}

.page-about .about-time::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: linear-gradient(var(--copper), rgba(184, 115, 51, 0.16));
}

.page-about .about-time li {
  position: relative;
  padding: 0 0 1.15rem 2rem;
}

.page-about .about-time li:last-child {
  padding-bottom: 0;
}

.page-about .about-time li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--copper);
}

.page-about .about-time__year {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--copper);
}

.page-about .about-time h3 {
  margin: 0.25rem 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-time p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1.25rem;
  margin-top: 0.9rem;
}

.page-about .about-roles {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-roles li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .about-roles__dot {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 0.55rem;
  border-radius: 2px;
  background: var(--slate);
}

.page-about .about-roles strong {
  color: var(--ink);
}

.page-about .about-figure--side {
  margin-top: 0;
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.15rem;
}

.page-about .about-scenes article {
  padding: 1.05rem 1.1rem 1.15rem;
  background: var(--moss);
  border-radius: var(--radius-md);
  border-bottom: 3px solid var(--ink);
}

.page-about .about-scenes__tag {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-scenes h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-scenes p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.74;
  color: var(--text-soft);
}

.page-about .about-next {
  margin-top: 1.5rem;
  padding: clamp(1.15rem, 3vw, 1.65rem);
  display: grid;
  gap: 1rem;
  background: var(--ink);
  border-radius: var(--radius-lg);
}

.page-about .about-next p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.85);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .about-next__ghost {
  border: 1px solid rgba(244, 239, 230, 0.35);
  background: transparent;
  color: var(--paper);
}

.page-about .about-next__ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-points,
  .page-about .about-scenes,
  .page-about .about-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-next {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-flow__svg {
    display: block;
  }
}

@media (min-width: 820px) {
  .page-about .about-time {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .about-time::before {
    left: 0;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 2px;
  }

  .page-about .about-time li {
    padding: 1.85rem 0 0;
  }

  .page-about .about-time li::before {
    top: -1px;
    left: 0;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-toc ol {
    display: grid;
    gap: 0.1rem;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-toc a {
    padding: 0.45rem 0.2rem 0.45rem 0.85rem;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
    white-space: normal;
    font-size: 0.86rem;
  }

  .page-about .about-toc a:hover {
    color: var(--ink);
    border-left-color: var(--copper);
  }

  .page-about .about-toc a[aria-current="true"] {
    background: transparent;
    color: var(--ink);
    font-weight: 700;
    border-left-color: var(--copper);
  }

  .page-about .about-toc a[aria-current="true"] .about-toc__num {
    color: var(--copper);
  }

  .page-about .about-scale {
    display: block;
    margin-top: 1.4rem;
    padding-top: 1.1rem;
    border-top: 1px dashed var(--line);
  }

  .page-about .about-scale ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
  }

  .page-about .about-scale a {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    font-size: 0.8rem;
    color: var(--muted);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
  }

  .page-about .about-scale a span {
    font-size: 0.82rem;
    color: var(--copper);
    font-weight: 600;
  }

  .page-about .about-scale a:hover {
    color: var(--ink);
  }

  .page-about .about-flow__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }
}

@media (min-width: 1080px) {
  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.65rem;
  }

  .page-about .about-flow__card {
    padding: 0.9rem 0.8rem 1rem;
  }

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

  .page-about .about-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-about .about-flow__card:hover {
    transform: none;
  }
}
<<<END>>>