.page-about {
  --about-radius: 2px;
  --about-hair: 2px;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .ls-breadcrumb {
  margin-top: clamp(16px, 3vw, 28px);
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  text-transform: none;
  letter-spacing: -0.01em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 44ch;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--about-hair) solid var(--ls-line);
  box-shadow: var(--ls-shadow);
  transform: rotate(-1.1deg);
  transform-origin: 60% 40%;
}

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

.page-about .about-hero__figure .ls-media__caption {
  padding: 10px 14px;
  border-top: var(--about-hair) solid var(--ls-line);
  font-size: 13px;
  color: var(--ls-grey);
}

/* ---------- 首屏数据带 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--ls-line);
  border: var(--about-hair) solid var(--ls-line);
  box-shadow: var(--ls-shadow);
}

.page-about .about-stats__item {
  margin: 0;
  padding: 18px 18px 20px;
  background: var(--ls-forest);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--ls-font-mono);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  color: var(--ls-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__label {
  font-size: 13px;
  color: var(--ls-grey);
  letter-spacing: 0.02em;
}

/* ---------- 章节通用头部 ---------- */
.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 18px;
  row-gap: 8px;
  padding-bottom: 18px;
  border-bottom: var(--about-hair) solid var(--ls-line);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-head__idx {
  font-family: var(--ls-font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--ls-orange);
  letter-spacing: -0.03em;
}

.page-about .about-head .ls-h2 {
  margin: 0;
}

.page-about .about-head__note {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  color: var(--ls-grey);
  max-width: 46ch;
}

/* ---------- 三条业务线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-line {
  border: var(--about-hair) solid var(--ls-line);
  background: var(--ls-forest);
  padding: 22px 20px 24px;
  box-shadow: var(--ls-shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-line .ls-tag {
  align-self: flex-start;
}

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

.page-about .about-line__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ls-white);
  max-width: 42ch;
}

.page-about .about-line__list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  border-top: 1px dashed var(--ls-grid);
  padding-top: 14px;
}

.page-about .about-line__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ls-grey);
  line-height: 1.6;
}

.page-about .about-line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--ls-cyan);
}

.page-about .about-line--b .about-line__list li::before {
  background: var(--ls-orange);
}

.page-about .about-line--c .about-line__list li::before {
  background: var(--ls-lake);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-section--forest {
  background: var(--ls-forest);
  border-top: var(--about-hair) solid var(--ls-line);
  border-bottom: var(--about-hair) solid var(--ls-line);
}

.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

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

.page-about .about-coverage__cell {
  background: var(--ls-carbon);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-coverage__num {
  font-family: var(--ls-font-mono);
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1;
  color: var(--ls-white);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-coverage__num small {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--ls-orange);
}

.page-about .about-coverage__unit {
  font-size: 14px;
  color: var(--ls-cyan);
  letter-spacing: 0.02em;
}

.page-about .about-coverage__note {
  font-size: 13px;
  color: var(--ls-grey);
  line-height: 1.6;
}

.page-about .about-coverage__text {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-coverage__text .ls-prose {
  margin: 0;
}

.page-about .about-coverage__text a {
  color: var(--ls-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 内容生产流程 ---------- */
.page-about .about-pipeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-pipeline__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--about-hair) solid var(--ls-line);
}

.page-about .about-pipeline__step {
  position: relative;
  margin: 0;
  padding: 22px 0 22px 56px;
  border-bottom: var(--about-hair) solid var(--ls-line);
}

.page-about .about-pipeline__no {
  position: absolute;
  left: 0;
  top: 24px;
  font-family: var(--ls-font-mono);
  font-size: 15px;
  color: var(--ls-carbon);
  background: var(--ls-cyan);
  padding: 3px 7px;
  line-height: 1.2;
  border-radius: var(--about-radius);
  font-variant-numeric: tabular-nums;
}

.page-about .about-pipeline__name {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: 0.01em;
}

.page-about .about-pipeline__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ls-grey);
  max-width: 46ch;
}

.page-about .about-pipeline__who {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ls-lake);
  border: 1px solid var(--ls-line);
  padding: 3px 8px;
  border-radius: var(--about-radius);
}

.page-about .about-pipeline__figure {
  margin: 0;
  border: var(--about-hair) solid var(--ls-line);
  box-shadow: var(--ls-shadow);
  align-self: start;
}

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

.page-about .about-pipeline__figure .ls-media__caption {
  padding: 10px 14px;
  border-top: var(--about-hair) solid var(--ls-line);
  font-size: 13px;
  color: var(--ls-grey);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-team__copy {
  display: grid;
  gap: clamp(16px, 3vw, 22px);
  align-content: start;
}

.page-about .about-team__group {
  position: relative;
  border: var(--about-hair) solid var(--ls-line);
  background: var(--ls-forest);
  padding: 24px 20px 24px;
  box-shadow: var(--ls-shadow-sm);
}

.page-about .about-team__group--product {
  background: var(--ls-carbon);
}

.page-about .about-team__count {
  display: block;
  font-family: var(--ls-font-mono);
  font-size: clamp(36px, 7vw, 56px);
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 2px var(--ls-cyan);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.page-about .about-team__group--product .about-team__count {
  -webkit-text-stroke-color: var(--ls-orange);
}

.page-about .about-team__name {
  margin: 0 0 10px;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ls-grey);
  max-width: 48ch;
}

.page-about .about-team__tags {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team__figure {
  margin: 0;
  border: var(--about-hair) solid var(--ls-line);
  box-shadow: var(--ls-shadow);
  align-self: start;
}

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

.page-about .about-team__figure .ls-media__caption {
  padding: 10px 14px;
  border-top: var(--about-hair) solid var(--ls-line);
  font-size: 13px;
  color: var(--ls-grey);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--ls-line);
  border: var(--about-hair) solid var(--ls-line);
  box-shadow: var(--ls-shadow);
}

.page-about .about-timeline__item {
  position: relative;
  margin: 0;
  padding: 20px 18px 22px;
  background: var(--ls-carbon);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 18px;
  row-gap: 6px;
  align-items: baseline;
}

.page-about .about-timeline__year {
  grid-row: span 2;
  font-family: var(--ls-font-mono);
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1;
  color: var(--ls-cyan);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__title {
  margin: 0;
  font-size: 17px;
  letter-spacing: 0.01em;
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ls-grey);
}

.page-about .about-timeline__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-about .about-timeline__foot a {
  color: var(--ls-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 22px);
}

.page-about .about-partner {
  position: relative;
  margin: 0;
  border: var(--about-hair) solid var(--ls-line);
  padding: 22px 20px 24px 62px;
  background: transparent;
  transition: background var(--ls-t) ease, border-color var(--ls-t) ease;
}

.page-about .about-partner:hover {
  background: var(--ls-forest);
}

.page-about .about-partner__kind {
  position: absolute;
  left: 18px;
  top: 22px;
  font-family: var(--ls-font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ls-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner__title {
  margin: 0 0 10px;
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ls-grey);
  max-width: 52ch;
}

.page-about .about-partners__foot {
  margin: clamp(22px, 3vw, 30px) 0 0;
}

.page-about .about-partners__foot a {
  color: var(--ls-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 服务区域与联系 ---------- */
.page-about .about-section--closing {
  padding-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-reach__main {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-reach__main .ls-prose {
  margin: 0;
}

.page-about .about-reach__main a {
  color: var(--ls-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-reach__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: var(--about-hair) solid var(--ls-line);
  background: var(--ls-forest);
  box-shadow: var(--ls-shadow);
  align-self: start;
}

.page-about .about-reach__list li {
  padding: 16px 18px;
  border-bottom: var(--about-hair) solid var(--ls-line);
  display: grid;
  gap: 6px;
}

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

.page-about .about-reach__k {
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ls-lake);
}

.page-about .about-reach__v {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ls-white);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-partner:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-about .about-line--b {
    transform: translateY(20px);
  }

  .page-about .about-line--c {
    transform: translateY(40px);
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

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

  .page-about .about-pipeline__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 0;
    gap: 0 var(--about-hair);
    background: var(--ls-line);
    border: var(--about-hair) solid var(--ls-line);
  }

  .page-about .about-pipeline__step {
    background: var(--ls-carbon);
    border-bottom: 0;
    padding: 22px 20px 24px 20px;
    display: flex;
    flex-direction: column;
  }

  .page-about .about-pipeline__no {
    position: static;
    align-self: flex-start;
    margin-bottom: 12px;
    top: auto;
    left: auto;
  }

  .page-about .about-pipeline__who {
    margin-top: auto;
    align-self: flex-start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-timeline {
    display: flex;
    gap: 0;
    background: transparent;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    border-top: var(--about-hair) solid var(--ls-line);
    box-shadow: none;
    padding-top: 34px;
  }

  .page-about .about-timeline__item {
    flex: 1 1 0;
    min-width: 0;
    display: block;
    background: transparent;
    padding: 0 18px 0 0;
    border-bottom: 0;
  }

  .page-about .about-timeline__item::before {
    content: "";
    position: absolute;
    top: -41px;
    left: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ls-cyan);
    box-shadow: 0 0 0 4px var(--ls-forest);
  }

  .page-about .about-section--forest .about-timeline__item::before {
    box-shadow: 0 0 0 4px var(--ls-forest);
  }

  .page-about .about-timeline__item + .about-timeline__item {
    padding-left: 18px;
    border-left: 1px dashed var(--ls-grid);
  }

  .page-about .about-timeline__year {
    display: block;
    margin-bottom: 10px;
  }

  .page-about .about-timeline__item::before {
    left: 0;
  }

  .page-about .about-timeline__item + .about-timeline__item::before {
    left: 18px;
  }

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

  .page-about .about-partner:first-child {
    grid-column: auto;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 1280px) {
  .page-about .about-line {
    padding: 26px 24px 28px;
  }

  .page-about .about-coverage__cell {
    padding: 24px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__figure,
  .page-about .about-line--b,
  .page-about .about-line--c {
    transform: none;
  }
}