.page-about {
  --about-gap: clamp(48px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 6vw, 72px) 0 0;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 10% 0%, rgba(43, 227, 192, 0.12) 0%, rgba(6, 23, 19, 0) 60%),
    linear-gradient(180deg, #061713 0%, #061713 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(23, 54, 47, 0.9) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 54, 47, 0.9) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.15) 82%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.15) 82%, transparent 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  margin: 22px 0 0;
  color: var(--lb-amber);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--lb-sans);
  font-weight: 900;
  font-size: clamp(32px, 7.4vw, 78px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--lb-white);
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  color: var(--lb-mist);
}

.page-about .about-numbers {
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--lb-line);
  border-top: 1px solid var(--lb-line);
  border-bottom: 1px solid var(--lb-line);
}

.page-about .about-numbers__item {
  background: var(--lb-night);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-numbers__value {
  font-family: var(--lb-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: clamp(26px, 5.2vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lb-cyan);
}

.page-about .about-numbers__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lb-mist);
}

.page-about .about-hero__media {
  position: relative;
  margin: clamp(32px, 6vw, 64px) 0 0;
  padding: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero__media .lb-media__cap {
  display: block;
  padding: 10px clamp(16px, 4vw, 44px) 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lb-mist);
  border-top: 1px solid var(--lb-line);
  margin-top: 0;
  padding-top: 12px;
}

/* ---------- 左窄右宽长画布 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: clamp(28px, 5vw, 56px);
}

.page-about .about-index {
  border-bottom: 1px solid var(--lb-line);
  padding: 0 0 16px;
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lb-amber);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 22px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--lb-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

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

.page-about .about-index__num {
  font-family: var(--lb-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lb-amber);
}

/* ---------- 章节 ---------- */
.page-about .about-block {
  padding: var(--about-gap) 0;
  border-bottom: 1px solid var(--lb-line);
}

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

.page-about .about-block--turf {
  background: linear-gradient(
    180deg,
    rgba(11, 42, 34, 0) 0%,
    rgba(11, 42, 34, 0.9) 12%,
    rgba(11, 42, 34, 0.9) 88%,
    rgba(11, 42, 34, 0) 100%
  );
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--lb-sans);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--lb-white);
  max-width: 20ch;
}

.page-about .about-lead {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lb-mist);
}

.page-about .about-prose {
  margin-top: 20px;
  max-width: 62ch;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--lb-mist);
}

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

/* ---------- 印记 ---------- */
.page-about .about-marks {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-mark {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--lb-line);
}

.page-about .about-mark__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lb-amber);
}

.page-about .about-mark__v {
  font-size: 14px;
  line-height: 1.7;
  color: var(--lb-white);
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--lb-line);
  transition: background-color 0.22s ease, padding-left 0.22s ease;
}

.page-about .about-role__num {
  font-family: var(--lb-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lb-cyan);
}

.page-about .about-role__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--lb-white);
  letter-spacing: 0.04em;
}

.page-about .about-role__desc {
  display: block;
  font-size: 14px;
  line-height: 1.78;
  color: var(--lb-mist);
  max-width: 52ch;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 0;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-figure--tight {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: 50% 42%;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-figure .lb-media__cap {
  display: block;
  margin: 0;
  padding: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lb-mist);
}

/* ---------- 四步流程 ---------- */
.page-about .about-flow {
  position: relative;
  list-style: none;
  margin: clamp(30px, 5vw, 44px) 0 0;
  padding: 4px 0 0 26px;
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(
    180deg,
    var(--lb-cyan) 0%,
    rgba(43, 227, 192, 0.35) 34%,
    var(--lb-line) 68%,
    rgba(23, 54, 47, 0) 100%
  );
}

.page-about .about-flow__item {
  position: relative;
  padding: 0 0 30px;
}

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

.page-about .about-flow__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lb-cyan);
  box-shadow: 0 0 0 3px rgba(43, 227, 192, 0.14);
}

.page-about .about-flow__step {
  display: block;
  font-family: var(--lb-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lb-amber);
  margin-bottom: 8px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--lb-white);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--lb-mist);
  max-width: 56ch;
}

/* ---------- 六类内容 ---------- */
.page-about .about-chips {
  margin: 28px 0 0;
}

.page-about .about-cats {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--lb-line);
  border: 1px solid var(--lb-line);
}

.page-about .about-cat {
  background: var(--lb-turf);
  padding: 22px 20px 24px;
  transition: background-color 0.22s ease;
}

.page-about .about-cat:hover {
  background: #0E322A;
}

.page-about .about-cat__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--lb-white);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-cat__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--lb-cyan);
  flex: 0 0 auto;
}

.page-about .about-cat__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--lb-mist);
}

.page-about [data-hidden] {
  display: none !important;
}

/* ---------- 更新与版本 ---------- */
.page-about .about-beats {
  margin-top: clamp(28px, 5vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-beat {
  padding: 24px 0 26px;
  border-bottom: 1px solid var(--lb-line);
}

.page-about .about-beat__tag {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lb-amber);
}

.page-about .about-beat__num {
  margin: 0 0 12px;
  font-family: var(--lb-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--lb-orange);
}

.page-about .about-beat__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--lb-mist);
  max-width: 54ch;
}

/* ---------- 长期方向 ---------- */
.page-about .about-aims {
  list-style: none;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 0;
  counter-reset: none;
}

.page-about .about-aim {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-aim:last-child {
  border-bottom: 1px solid var(--lb-line);
}

.page-about .about-aim__num {
  font-family: var(--lb-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--lb-cyan);
  padding-top: 4px;
}

.page-about .about-aim__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--lb-white);
}

.page-about .about-aim__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--lb-mist);
  max-width: 56ch;
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  margin-top: clamp(36px, 6vw, 60px);
  padding-top: 26px;
  border-top: 1px solid var(--lb-line);
}

.page-about .about-next__lead {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--lb-white);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--lb-line);
  border: 1px solid var(--lb-line);
}

.page-about .about-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background: var(--lb-ink);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: #08201A;
}

.page-about .about-link__k {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lb-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-link__k::after {
  content: "→";
  font-family: var(--lb-mono);
  color: var(--lb-orange);
  transition: transform 0.2s ease;
}

.page-about .about-link:hover .about-link__k::after {
  transform: translateX(4px);
}

.page-about .about-link__v {
  font-size: 14px;
  line-height: 1.7;
  color: var(--lb-mist);
}

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

.lb-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.lb-js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-numbers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .about-role {
    grid-template-columns: 104px 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 22px;
    padding: 20px 14px;
  }

  .page-about .about-role:hover {
    background: rgba(43, 227, 192, 0.05);
    padding-left: 20px;
  }

  .page-about .about-beats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 40px;
    border-bottom: 1px solid var(--lb-line);
  }

  .page-about .about-beat {
    border-bottom: 0;
    padding-bottom: 30px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 88px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 108px;
    border-bottom: 0;
    border-left: 1px solid var(--lb-line);
    padding: 6px 0 6px 20px;
  }

  .page-about .about-index__label {
    margin-bottom: 18px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 16px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list a {
    position: relative;
    padding-left: 0;
  }

  .page-about .about-index__list a::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 50%;
    width: 5px;
    height: 1px;
    background: var(--lb-line);
    transition: width 0.2s ease, background-color 0.2s ease;
  }

  .page-about .about-index__list a:hover::before {
    width: 10px;
    background: var(--lb-cyan);
  }

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

  .page-about .about-hero__title {
    max-width: 17ch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .lb-js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-role,
  .page-about .about-cat,
  .page-about .about-link,
  .page-about .about-index__list a::before {
    transition: none;
  }
}
<<<END>>>