.page-about {
  --about-measure: 34em;
  --about-cut: 14px;
}

/* 章节节奏 */
.page-about > .section {
  padding-block: clamp(44px, 7vw, 92px);
}

.page-about > .section:first-child {
  padding-top: clamp(18px, 2.6vw, 32px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.page-about > .section:last-child {
  padding-bottom: clamp(52px, 8vw, 96px);
}

/* 章节抬头 */
.page-about .about-head {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-head .index-tag {
  position: relative;
  padding-left: 14px;
}

.page-about .about-head .index-tag::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 3px;
  background: var(--lime);
}

.page-about .about-head h2 {
  font-family: var(--font-cn);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--warm);
  margin: 12px 0 0;
}

/* 面包屑间距 */
.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

/* 首屏 */
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-cn);
  font-size: clamp(30px, 5.2vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--warm);
  margin: 14px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: var(--soft);
  max-width: 34em;
  margin: 20px 0 0;
}

.page-about .about-hero__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .about-hero__figure,
.page-about .about-team__figure,
.page-about .about-story__figure {
  margin: 0;
}

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

/* 为什么做轻 */
.page-about .about-why__body {
  max-width: var(--about-measure);
  display: flex;
  flex-direction: column;
  gap: 1.15em;
}

.page-about .about-why__body p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--soft);
  margin: 0;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-metric {
  background: var(--panel);
  padding: 22px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.page-about .about-metric__value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .about-metric__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mint);
}

/* 斜线轨迹分隔 */
.page-about .about-slash {
  height: clamp(20px, 3vw, 34px);
  margin-block: clamp(8px, 1.6vw, 16px);
  background-image: repeating-linear-gradient(
    -58deg,
    var(--line) 0 1px,
    transparent 1px 14px
  );
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
  opacity: 0.85;
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-team__copy > p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--soft);
  max-width: 34em;
  margin: 0;
}

.page-about .about-team__list {
  list-style: none;
  padding: 0;
  margin: clamp(22px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__k {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--purple);
  padding-top: 2px;
}

.page-about .about-team__item h3 {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 700;
  color: var(--warm);
  margin: 0 0 6px;
}

.page-about .about-team__item p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--soft);
  margin: 0;
  max-width: 30em;
}

/* 服务覆盖 */
.page-about .about-reach__lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--soft);
  max-width: var(--about-measure);
  margin: 0;
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-reach__stat {
  border-top: 2px solid var(--line);
  padding-top: 15px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--warm);
}

.page-about .about-reach__num small {
  font-size: 0.48em;
  color: var(--lime);
  margin-left: 2px;
  letter-spacing: 0;
}

.page-about .about-reach__unit {
  font-size: 14px;
  font-weight: 600;
  color: var(--lime);
  line-height: 1.5;
}

.page-about .about-reach__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mint);
}

/* 更新周期 */
.page-about .about-cycle__body {
  max-width: var(--about-measure);
  display: flex;
  flex-direction: column;
  gap: 1.15em;
}

.page-about .about-cycle__body p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--soft);
  margin: 0;
}

.page-about .about-cycle__panel {
  margin-top: clamp(26px, 4vw, 42px);
}

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

.page-about .about-cycle__list li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}

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

.page-about .about-cycle__t {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--warm);
}

.page-about .about-cycle__d {
  color: var(--soft);
  line-height: 1.7;
}

/* 发展历程 */
.page-about .about-story__figure {
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-stages {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-stage {
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-about .about-stage__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 4px;
  width: 100%;
  padding: 18px 26px 18px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
  position: relative;
}

.page-about .about-stage__idx {
  grid-row: 1 / span 2;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--purple);
  padding-top: 4px;
}

.page-about .about-stage__name {
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--warm);
  transition: color 160ms var(--ease);
}

.page-about .about-stage__kw {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--mint);
}

.page-about .about-stage__toggle {
  position: absolute;
  top: 25px;
  right: 6px;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--mint);
  border-bottom: 1.5px solid var(--mint);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-stage__head[aria-expanded="true"] .about-stage__toggle {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-about .about-stage__head:hover .about-stage__name,
.page-about .about-stage__head:focus-visible .about-stage__name {
  color: var(--lime);
}

.page-about .about-stage__panel {
  padding: 0 26px 20px 0;
}

.page-about .about-stage__panel p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--soft);
  margin: 0;
  max-width: 34em;
}

/* 常用信息 */
.page-about .about-res__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-res__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

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

.page-about .about-res__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mint);
  opacity: 0.62;
  margin-top: auto;
  padding-top: 6px;
  transition: opacity 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-res__card:hover .about-res__count,
.page-about .about-res__card:focus-visible .about-res__count {
  opacity: 1;
  color: var(--lime);
}

/* 收束 */
.page-about .about-close__line {
  font-family: var(--font-cn);
  font-size: clamp(18px, 2.4vw, 25px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.012em;
  color: var(--warm);
  margin: 0 0 22px;
  max-width: 24em;
}

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

/* 响应式 */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-reach__grid {
    gap: 22px 20px;
  }

  .page-about .about-res__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-cycle__list li {
    grid-template-columns: 96px minmax(0, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-stages {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-stage {
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding-inline: 20px;
  }

  .page-about .about-stage:first-child {
    padding-left: 0;
  }

  .page-about .about-stage:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .about-stage__head {
    padding-right: 22px;
  }

  .page-about .about-stage__panel {
    padding-right: 12px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-res__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage__toggle,
  .page-about .about-stage__name,
  .page-about .about-res__count {
    transition: none;
  }
}