.page-about {
  --about-rule: 1px solid var(--line);
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .ly-crumbs {
  padding-top: 20px;
  padding-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .ly-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}

.page-about .ly-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-700);
}

.page-about .ly-crumbs a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .ly-crumbs a:hover,
.page-about .ly-crumbs a:focus-visible {
  color: var(--cyan);
}

.page-about .ly-crumbs [aria-current="page"] {
  color: var(--cyan-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(44px, 6vw, 80px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 62% at 18% 0%, rgba(51, 230, 230, 0.13), transparent 70%),
    radial-gradient(46% 54% at 92% 26%, rgba(255, 106, 77, 0.11), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.2vw, 66px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--text);
  max-width: 16em;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--cyan), var(--coral));
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-fact {
  background: var(--ink-800);
  padding: 14px 16px 16px;
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel, var(--muted));
  color: var(--muted);
  margin: 0;
}

.page-about .about-fact__num {
  margin: 6px 0 0;
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-soft);
}

.page-about .about-fact__unit {
  font-size: 12px;
  margin-left: 4px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 21, 33, 0) 45%, rgba(4, 21, 33, 0.82) 100%);
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(44px, 7vw, 88px) 0;
  border-top: var(--about-rule);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 3vw, 28px);
}

.page-about .about-chapter__no {
  flex: 0 0 auto;
  margin: 0;
  font-size: clamp(38px, 8vw, 84px);
  line-height: 0.9;
  font-weight: 700;
  color: rgba(143, 176, 189, 0.34);
  letter-spacing: -0.04em;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .about-chapter__no {
    color: transparent;
    -webkit-text-stroke: 1px var(--line-strong);
  }
}

.page-about .about-chapter__headtext {
  padding-top: 4px;
}

.page-about .about-chapter__title {
  margin: 8px 0 0;
  font-size: clamp(22px, 4.4vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
  max-width: 22em;
}

.page-about .about-chapter__intro {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-chapter__body {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-chapter__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 40em;
}

.page-about .about-chapter__text p:first-child {
  color: var(--text);
}

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

.page-about .about-chapter__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .about-note {
  border-left: 2px solid var(--line-strong);
  padding: 2px 0 2px 14px;
}

.page-about .about-note__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}

.page-about .about-note__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 26em;
}

/* ---------- 版本切换 ---------- */
.page-about .about-versions {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .about-versions__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  padding: 0;
  border: 0;
  background: none;
  list-style: none;
}

.page-about .about-version__node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  text-align: left;
  padding: 13px 16px;
  background: var(--ink-800);
  border: var(--about-rule);
  border-left: 2px solid var(--ink-700);
  border-radius: var(--radius);
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease;
}

.page-about .about-version__node:hover {
  color: var(--text);
  border-left-color: var(--cyan-soft);
}

.page-about .about-version__node[aria-selected="true"] {
  background: var(--ink-700);
  border-color: var(--line-strong);
  border-left-color: var(--cyan);
  color: var(--text);
}

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

.page-about .about-version__era {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-version__node[aria-selected="true"] .about-version__era {
  color: var(--cyan);
}

.page-about .about-version__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .about-version__panel {
  border: var(--about-rule);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--ink-800);
  padding: clamp(20px, 3.4vw, 32px);
}

.page-about .about-version__panel-title {
  margin: 0;
  font-size: clamp(18px, 3vw, 22px);
  line-height: 1.4;
  font-weight: 800;
  color: var(--text);
}

.page-about .about-version__lede {
  margin: 12px 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 38em;
}

.page-about .about-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-points__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding-top: 12px;
  border-top: var(--about-rule);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-points__key {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--coral);
}

/* ---------- 运营步骤 ---------- */
.page-about .about-steps {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: var(--about-rule);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-step__no {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-size: clamp(16px, 2.6vw, 19px);
  line-height: 1.45;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 44em;
}

.page-about .about-quote {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: clamp(24px, 4vw, 40px);
  background: var(--paper);
  border-radius: var(--radius);
  color: var(--ink-900);
  position: relative;
}

.page-about .about-quote::before {
  content: "”";
  position: absolute;
  top: 4px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 54px;
  line-height: 1;
  color: rgba(4, 21, 33, 0.16);
}

.page-about .about-quote p {
  position: relative;
  margin: 0;
  font-size: clamp(17px, 3.2vw, 24px);
  line-height: 1.6;
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 26em;
}

/* ---------- 团队折叠 ---------- */
.page-about .about-roles {
  margin-top: clamp(24px, 4vw, 34px);
  border-top: var(--about-rule);
}

.page-about .about-roles__item {
  border-bottom: var(--about-rule);
}

.page-about .about-roles__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  transition: color 160ms ease;
}

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

.page-about .about-roles__summary:hover,
.page-about .about-roles__summary:focus-visible {
  color: var(--cyan-soft);
}

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

.page-about .about-roles__name {
  font-size: clamp(15px, 2.6vw, 18px);
  font-weight: 700;
}

.page-about .about-roles__hint {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-roles__item[open] .about-roles__hint {
  color: var(--coral);
}

.page-about .about-roles__body p {
  margin: 0 0 18px;
  padding-right: 2px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 46em;
}

/* ---------- 图片模块 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  position: relative;
  border: var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 12 / 7;
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(180deg, rgba(51, 230, 230, 0.05) 0 1px, transparent 1px 4px);
  pointer-events: none;
}

.page-about .about-figure__caption {
  position: absolute;
  right: 12px;
  bottom: 10px;
  z-index: 1;
  padding: 3px 8px;
  background: rgba(4, 21, 33, 0.78);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

/* ---------- 归档规模 ---------- */
.page-about .about-archive {
  display: grid;
  gap: clamp(20px, 3.5vw, 32px);
  margin-top: clamp(22px, 3.5vw, 30px);
  align-items: start;
}

.page-about .about-archive__figure {
  margin: 0;
}

.page-about .about-archive__figure img {
  aspect-ratio: 3 / 2;
}

.page-about .about-archive__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--ink-800);
  transition: background-color 160ms ease;
}

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

.page-about .about-stat__num {
  font-size: clamp(20px, 3.8vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-soft);
}

.page-about .about-stat:hover .about-stat__num {
  color: var(--lime);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-stat__note {
  font-size: 11px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-archive__more {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 46em;
}

.page-about .about-archive__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-archive__more a:hover,
.page-about .about-archive__more a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan);
}

/* ---------- 联系收束 ---------- */
.page-about .about-chapter--last {
  border-bottom: var(--about-rule);
}

.page-about .about-contact {
  display: grid;
  gap: clamp(22px, 3.5vw, 36px);
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .about-contact__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 38em;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-contact__panel {
  border: var(--about-rule);
  border-top: 2px solid var(--coral);
  border-radius: var(--radius);
  background: var(--ink-800);
  padding: 18px 18px 6px;
}

.page-about .about-contact__panel-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-about .about-contact__line {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: var(--about-rule);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-contact__line:last-child {
  border-bottom: 0;
}

.page-about .about-contact__key {
  flex: 0 0 64px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
}

@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-step {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 24px;
    padding: 24px 0;
  }

  .page-about .about-archive {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-hero__figure img {
    aspect-ratio: 3 / 4;
  }

  .page-about .about-versions {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: clamp(24px, 3.5vw, 40px);
    align-items: start;
  }

  .page-about .about-versions__list::before {
    content: "";
    position: absolute;
    left: 12px;
    top: 18px;
    bottom: 18px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan), var(--ink-700));
    opacity: 0.55;
  }

  .page-about .about-version__node {
    padding-left: 22px;
    border-left-width: 1px;
  }

  .page-about .about-version__node[aria-selected="true"] {
    border-left: 2px solid var(--cyan);
  }

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

  .page-about .about-stat {
    padding: 18px 18px 20px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-chapter__no {
    min-width: 130px;
  }

  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 0.9fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-version__node,
  .page-about .about-stat,
  .page-about .about-roles__summary {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --steel: currentColor;
}