.page-about {
  background: var(--lj-rock);
  color: var(--lj-paper);
  overflow-x: hidden;
}

.page-about .about-crumb {
  margin: 0 0 26px;
  font-size: 13px;
}

.page-about .about-crumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-about .about-crumb li {
  color: rgba(242, 237, 228, 0.55);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(242, 237, 228, 0.32);
}

.page-about .about-crumb a {
  color: rgba(242, 237, 228, 0.78);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  color: var(--lj-cyan);
}

/* ---------- 通用文字件 ---------- */

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--lj-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lj-clay-hi);
}

.page-about .about-eyebrow::before {
  content: "";
  flex: none;
  width: 26px;
  height: 1px;
  background: currentColor;
}

.page-about .about-h2 {
  margin: 14px 0 0;
  font-family: var(--lj-font-serif);
  font-weight: 600;
  font-size: clamp(1.45rem, 1.05rem + 1.7vw, 2.25rem);
  line-height: 1.32;
  letter-spacing: 0;
}

.page-about .about-sub {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.72);
}

.page-about .about-light {
  background: var(--lj-paper);
  color: var(--lj-ink);
}

.page-about .about-light .about-eyebrow {
  color: var(--lj-clay);
}

.page-about .about-light .about-sub {
  color: var(--lj-muted);
}

.page-about .about-sec-head {
  max-width: 640px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: calc(var(--lj-header-h) + 48px) 0 64px;
  background:
    radial-gradient(circle at 82% 8%, rgba(196, 85, 59, 0.34), transparent 54%),
    radial-gradient(circle at 8% 88%, rgba(56, 224, 200, 0.14), transparent 46%),
    var(--lj-rock);
  border-bottom: 1px solid var(--lj-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(46, 58, 60, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 58, 60, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--lj-font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7.6vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 237, 228, 0.78);
}

.page-about .about-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-map {
  border: 1px solid var(--lj-line);
  background: rgba(26, 32, 36, 0.72);
  padding: 18px 16px 10px;
}

.page-about .about-map__title {
  margin: 0 0 12px;
  font-family: var(--lj-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--lj-moss);
}

.page-about .about-map__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-map__list a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 11px 0;
  border-top: 1px solid var(--lj-line);
  color: rgba(242, 237, 228, 0.82);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-map__list a .lj-mono {
  font-size: 11px;
  color: var(--lj-clay-hi);
}

.page-about .about-map__list a:hover {
  color: var(--lj-cyan);
  padding-left: 4px;
}

/* ---------- 起源自述 ---------- */

.page-about .about-origin {
  padding: 64px 0 56px;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-num {
  display: block;
  font-family: var(--lj-font-mono);
  font-size: clamp(1.9rem, 6vw, 3.2rem);
  line-height: 1;
  color: var(--lj-clay);
  letter-spacing: -0.02em;
}

.page-about .about-origin__head .about-h2 {
  margin-top: 18px;
}

.page-about .about-origin__body p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(242, 237, 228, 0.8);
}

.page-about .about-quote {
  margin: 28px 0;
  padding: 4px 0 4px 22px;
  border-left: 1px solid var(--lj-clay);
  font-family: var(--lj-font-serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.15rem, 1rem + 0.9vw, 1.5rem);
  line-height: 1.6;
  color: var(--lj-paper);
}

/* ---------- 图片版块 ---------- */

.page-about .about-plate {
  margin: 0;
  padding: 0 var(--lj-gutter);
  max-width: var(--lj-max);
}

.page-about .about-plate {
  margin-left: auto;
  margin-right: auto;
}

.page-about .about-plate__media {
  aspect-ratio: 5 / 3;
}

.page-about .about-plate__media--wide {
  aspect-ratio: 12 / 5;
}

.page-about .about-plate .lj-figure__cap {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 237, 228, 0.55);
}

/* ---------- 流程 ---------- */

.page-about .about-pipeline {
  padding: 64px 0 72px;
  margin-top: 56px;
}

.page-about .about-pipeline__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: end;
}

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

.page-about .about-pipeline__fig .lj-media {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--lj-paper-line);
}

.page-about .about-pipeline__fig .lj-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--lj-muted);
}

.page-about .about-steps {
  margin-top: 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--lj-paper-line);
  border-left: 1px solid var(--lj-paper-line);
}

.page-about .about-step {
  position: relative;
  padding: 24px 20px 28px;
  border-right: 1px solid var(--lj-paper-line);
  border-bottom: 1px solid var(--lj-paper-line);
  transition: background-color 0.25s ease;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--lj-clay);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.page-about .about-step:hover::before,
.page-about .about-step:focus-within::before {
  transform: scaleX(1);
}

.page-about .about-step:hover {
  background: rgba(196, 85, 59, 0.05);
}

.page-about .about-step__num {
  display: block;
  font-family: var(--lj-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lj-clay);
}

.page-about .about-step__title {
  margin: 12px 0 0;
  font-family: var(--lj-font-serif);
  font-weight: 600;
  font-size: 1.18rem;
  line-height: 1.4;
  color: var(--lj-ink);
}

.page-about .about-step__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lj-muted);
}

.page-about .about-step__cap {
  margin: 18px 0 0;
  font-family: var(--lj-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lj-blue);
}

.page-about .about-step__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--lj-paper-line);
  display: grid;
  gap: 8px;
}

.page-about .about-step__list li {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-family: var(--lj-font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--lj-muted);
  transition: color 0.25s ease;
}

.page-about .about-step__list li::before {
  content: "";
  flex: none;
  width: 5px;
  height: 5px;
  margin-top: 7px;
  background: var(--lj-blue);
}

.page-about .about-step:hover .about-step__list li {
  color: var(--lj-ink);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  padding: 72px 0 64px;
  background:
    radial-gradient(circle at 88% 24%, rgba(47, 111, 168, 0.18), transparent 52%),
    var(--lj-rock);
  border-bottom: 1px solid var(--lj-line);
}

.page-about .about-timeline__head {
  max-width: 660px;
}

.page-about .about-tl {
  list-style: none;
  margin: 44px 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--lj-line);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 40px 20px;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--lj-moss);
  transform: rotate(45deg);
}

.page-about .about-tl__tag {
  margin: 0;
  font-family: var(--lj-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lj-moss);
}

.page-about .about-tl__title {
  margin: 10px 0 0;
  font-family: var(--lj-font-serif);
  font-weight: 600;
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  line-height: 1.45;
  color: var(--lj-paper);
}

.page-about .about-tl__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 237, 228, 0.72);
  max-width: 62em;
}

.page-about .about-tl__details {
  margin-top: 12px;
}

.page-about .about-tl__details summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--lj-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lj-cyan);
}

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

.page-about .about-tl__details summary::after {
  content: "+";
  display: inline-block;
  width: 14px;
  text-align: center;
  border: 1px solid var(--lj-line);
  line-height: 1.2;
}

.page-about .about-tl__details[open] summary::after {
  content: "−";
}

.page-about .about-tl__details p {
  margin: 10px 0 0;
  padding: 12px 14px;
  border-left: 1px solid var(--lj-moss);
  background: rgba(26, 32, 36, 0.8);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.74);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: 64px 0 72px;
}

.page-about .about-team__grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--lj-paper-line);
  border: 1px solid var(--lj-paper-line);
}

.page-about .about-team__card {
  background: var(--lj-paper);
  padding: 26px 20px 30px;
}

.page-about .about-team__n {
  display: block;
  font-family: var(--lj-font-mono);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--lj-clay);
  letter-spacing: -0.02em;
}

.page-about .about-team__title {
  margin: 14px 0 0;
  font-family: var(--lj-font-serif);
  font-weight: 600;
  font-size: 1.12rem;
  line-height: 1.4;
  color: var(--lj-ink);
}

.page-about .about-team__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lj-muted);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  padding: 68px 0 60px;
  border-top: 1px solid var(--lj-line);
  background:
    radial-gradient(circle at 20% 80%, rgba(56, 224, 200, 0.1), transparent 50%),
    var(--lj-rock);
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-eco__stat {
  border: 1px solid var(--lj-line);
  background: var(--lj-panel);
  padding: 22px 18px 24px;
}

.page-about .about-eco__n {
  display: block;
  font-family: var(--lj-font-mono);
  font-size: 2.6rem;
  line-height: 1;
  color: var(--lj-cyan);
}

.page-about .about-eco__label {
  margin: 10px 0 0;
  font-family: var(--lj-font-serif);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--lj-paper);
}

.page-about .about-eco__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.68);
}

.page-about .about-eco__note {
  margin: 32px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--lj-line);
  font-family: var(--lj-font-serif);
  font-style: italic;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.66);
}

/* ---------- 时效承诺 ---------- */

.page-about .about-promise {
  padding: 60px 0 68px;
  background: var(--lj-panel);
  border-top: 1px solid var(--lj-line);
  border-bottom: 1px solid var(--lj-line);
}

.page-about .about-promise__grid {
  margin: 34px 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--lj-line);
  border: 1px solid var(--lj-line);
}

.page-about .about-promise__item {
  background: var(--lj-panel);
  padding: 22px 18px 24px;
}

.page-about .about-promise__item dt {
  font-family: var(--lj-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lj-moss);
}

.page-about .about-promise__item dd {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 237, 228, 0.78);
}

.page-about .about-promise__n {
  font-family: var(--lj-font-mono);
  font-size: 1.35rem;
  color: var(--lj-cyan);
  margin-right: 4px;
}

.page-about .about-promise__desc {
  margin-top: 8px !important;
  font-size: 13px !important;
  color: rgba(242, 237, 228, 0.55) !important;
}

/* ---------- 收束 ---------- */

.page-about .about-close {
  padding: 72px 0 84px;
  background:
    radial-gradient(circle at 76% 18%, rgba(196, 85, 59, 0.28), transparent 54%),
    var(--lj-rock);
}

.page-about .about-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.page-about .about-close__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--lj-line);
}

.page-about .about-close__links li {
  border-bottom: 1px solid var(--lj-line);
}

.page-about .about-close__links a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 16px 4px;
  color: rgba(242, 237, 228, 0.86);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-close__links a .lj-mono {
  font-size: 11px;
  color: var(--lj-clay-hi);
}

.page-about .about-close__links a:hover {
  color: var(--lj-cyan);
  padding-left: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-team__grid,
  .page-about .about-promise__grid,
  .page-about .about-eco__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: calc(var(--lj-header-h) + 72px) 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-origin {
    padding: 88px 0 72px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(32px, 6vw, 80px);
  }

  .page-about .about-pipeline {
    padding: 88px 0 96px;
    margin-top: 72px;
  }

  .page-about .about-pipeline__top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 52px;
  }

  .page-about .about-timeline {
    padding: 96px 0 88px;
  }

  .page-about .about-team {
    padding: 88px 0 96px;
  }

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

  .page-about .about-eco {
    padding: 96px 0 80px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-promise {
    padding: 80px 0 88px;
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-close {
    padding: 96px 0 104px;
  }

  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-tl__item {
    padding-left: 28px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-step {
    padding: 28px 26px 32px;
  }

  .page-about .about-team__card {
    padding: 30px 26px 34px;
  }
}

.page-about [id] {
  scroll-margin-top: calc(var(--lj-header-h) + 20px);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-step::before,
  .page-about .about-step,
  .page-about .about-step__list li,
  .page-about .about-close__links a,
  .page-about .about-map__list a {
    transition: none;
  }
}
<<<END>>>