.page-about {
  --about-pad-y: clamp(52px, 7vw, 104px);
  --about-line: rgba(243, 245, 242, 0.10);
  --about-line-strong: rgba(243, 245, 242, 0.26);
  background: var(--ink);
  color: var(--text);
}

.page-about .breadcrumb {
  margin-bottom: clamp(26px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4vw, 50px) 0 clamp(46px, 6.5vw, 92px);
  border-bottom: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 130% at 82% -10%, rgba(31, 92, 62, 0.42), transparent 62%),
    radial-gradient(50% 100% at 4% 0%, rgba(49, 226, 200, 0.06), transparent 60%);
  pointer-events: none;
}

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

.page-about .about-hero__body {
  max-width: 1080px;
}

.page-about .about-hero__title {
  margin: 14px 0 clamp(22px, 3vw, 38px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.2vw, 86px);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--grass-lite);
  box-shadow: inset 0 -0.16em 0 rgba(47, 138, 92, 0.32);
}

.page-about .about-hero__meta {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
  padding-top: clamp(18px, 2.6vw, 30px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 760px;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.82;
  color: var(--text);
}

.page-about .about-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 通用区块节奏 ---------- */

.page-about .section {
  padding: var(--about-pad-y) 0;
}

.page-about .about-why,
.page-about .about-teams {
  background: var(--ink);
}

.page-about .about-lineage {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-sourcing {
  background: var(--ink);
}

.page-about .about-partners {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  border-top: 1px solid var(--about-line);
}

/* ---------- 我们解决什么问题 ---------- */

.page-about .about-why__grid {
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.page-about .about-why__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-why__figure {
  margin: 0;
  border: 1px solid var(--about-line-strong);
}

.page-about .about-why__caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .about-why__main {
  min-width: 0;
}

.page-about .about-why__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-why__intro {
  margin: 0 0 clamp(26px, 3vw, 42px);
  font-size: 17px;
  line-height: 1.82;
  color: var(--text);
}

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

.page-about .pain-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(14px, 2vw, 28px);
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--about-line);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .pain-item:hover {
  border-bottom-color: var(--grass-lite);
  background: rgba(31, 92, 62, 0.12);
}

.page-about .pain-item__idx {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gray);
  padding-top: 4px;
}

.page-about .pain-item:hover .pain-item__idx {
  color: var(--pulse);
}

.page-about .pain-item__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .pain-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 发展历程 ---------- */

.page-about .about-lineage__head {
  max-width: 780px;
  margin-bottom: clamp(34px, 4.5vw, 64px);
}

.page-about .about-lineage__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-lineage__intro {
  margin: 0;
  font-size: 17px;
  line-height: 1.82;
  color: var(--text);
}

.page-about .lineage-track {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .lineage-track::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--grass-lite), rgba(47, 138, 92, 0.06));
}

.page-about .lineage-node {
  display: grid;
  gap: 8px;
  padding: 0 0 clamp(30px, 4vw, 52px) clamp(20px, 3vw, 44px);
  position: relative;
}

.page-about .lineage-node::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 10px;
  width: 7px;
  height: 7px;
  background: var(--ink-deep);
  border: 1px solid var(--grass-lite);
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .lineage-node:hover::before {
  background: var(--pulse);
  border-color: var(--pulse);
  transform: scale(1.35);
}

.page-about .lineage-node--flag::before {
  background: var(--ref);
  border-color: var(--ref);
}

.page-about .lineage-node__season {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 0.92;
  letter-spacing: -0.01em;
  color: transparent;
  -webkit-text-stroke: 1px var(--about-line-strong);
  transition: color 200ms var(--ease), -webkit-text-stroke-color 200ms var(--ease);
}

.page-about .lineage-node:hover .lineage-node__season {
  color: var(--grass-lite);
  -webkit-text-stroke-color: transparent;
}

.page-about .lineage-node--flag .lineage-node__season {
  color: transparent;
  -webkit-text-stroke: 1px rgba(243, 193, 58, 0.62);
}

.page-about .lineage-node--flag:hover .lineage-node__season {
  color: var(--ref);
  -webkit-text-stroke-color: transparent;
}

.page-about .lineage-node__body h3 {
  margin: 0 0 8px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .lineage-node__body p {
  margin: 0;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 四支团队 ---------- */

.page-about .about-teams__grid {
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.page-about .about-teams__main {
  min-width: 0;
}

.page-about .about-teams__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-teams__intro {
  margin: 0 0 clamp(26px, 3.2vw, 44px);
  font-size: 17px;
  line-height: 1.82;
  color: var(--text);
}

.page-about .team-roster {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

.page-about .team-item {
  padding: clamp(18px, 2.4vw, 28px) clamp(0px, 1vw, 16px);
  border-bottom: 1px solid var(--about-line);
  border-left: 2px solid transparent;
  transition: background-color 180ms var(--ease), border-left-color 180ms var(--ease);
}

.page-about .team-item:hover,
.page-about .team-item:focus-within {
  background: rgba(18, 40, 58, 0.72);
  border-left-color: var(--grass-lite);
}

.page-about .team-item__name {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .team-item__desc {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .team-item__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.07em;
  color: var(--gray);
}

.page-about .team-item:hover .team-item__meta {
  color: var(--grass-lite);
}

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

.page-about .about-teams__figure {
  margin: 0;
  border: 1px solid var(--about-line-strong);
}

.page-about .about-teams__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--grass);
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 数据来源与复核 ---------- */

.page-about .about-sourcing__head {
  max-width: 780px;
  margin-bottom: clamp(32px, 4.2vw, 60px);
}

.page-about .about-sourcing__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-sourcing__intro {
  margin: 0;
  font-size: 17px;
  line-height: 1.82;
  color: var(--text);
}

.page-about .source-flow {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .source-step {
  background: var(--ink);
  padding: clamp(20px, 2.6vw, 30px);
  display: grid;
  gap: 8px;
  transition: background-color 180ms var(--ease);
}

.page-about .source-step:hover {
  background: rgba(31, 92, 62, 0.16);
}

.page-about .source-step__num {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--grass-lite);
}

.page-about .source-step h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .source-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners__grid {
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}

.page-about .about-partners__main {
  min-width: 0;
}

.page-about .about-partners__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-partners__intro {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text);
}

.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .text-link {
  position: relative;
  display: inline-block;
  padding-bottom: 3px;
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-strong);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .text-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: var(--pulse);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 200ms var(--ease);
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--pulse);
  border-color: transparent;
}

.page-about .text-link:hover::after,
.page-about .text-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left center;
}

.page-about .about-partners__aside {
  min-width: 0;
}

.page-about .about-partners__figure {
  margin: 0;
  border: 1px solid var(--about-line-strong);
}

/* ---------- 服务范围数据带 ---------- */

.page-about .about-range {
  padding: clamp(48px, 6.5vw, 96px) 0;
  background: linear-gradient(120deg, var(--grass) 0%, #173F2C 52%, var(--ink-deep) 100%);
  border-top: 1px solid var(--about-line);
}

.page-about .about-range__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-range__title {
  margin: 12px 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 42px);
  line-height: 1.16;
  color: var(--paper);
}

.page-about .about-range__text {
  margin: 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(243, 245, 242, 0.82);
}

.page-about .about-range__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: rgba(243, 245, 242, 0.18);
  border: 1px solid rgba(243, 245, 242, 0.18);
}

.page-about .range-stat {
  background: rgba(6, 17, 28, 0.55);
  padding: clamp(16px, 2vw, 24px);
  transition: background-color 180ms var(--ease);
}

.page-about .range-stat:hover {
  background: rgba(6, 17, 28, 0.24);
}

.page-about .range-stat dt {
  margin-bottom: 8px;
}

.page-about .range-stat dd {
  margin: 0;
}

.page-about .range-stat .stat-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .range-stat .stat-value span {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  color: rgba(243, 245, 242, 0.7);
}

.page-about .about-range__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 3.6vw, 44px);
  padding-top: clamp(22px, 2.8vw, 32px);
  border-top: 1px solid rgba(243, 245, 242, 0.18);
}

/* ---------- 媒体框架兜底 ---------- */

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

.page-about .media-frame {
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .media-frame--tall img {
  aspect-ratio: 4 / 5;
  height: auto;
}

.page-about .media-frame--wide img {
  aspect-ratio: 10 / 7;
  height: auto;
}

.page-about .media-frame--std img {
  aspect-ratio: 3 / 2;
  height: auto;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__meta {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__meta {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-hero__chips {
    justify-content: flex-end;
  }

  .page-about .source-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-range__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .lineage-node {
    grid-template-columns: minmax(150px, 220px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 48px);
    align-items: start;
  }

  .page-about .lineage-node__season {
    text-align: right;
  }
}

@media (max-width: 959px) {
  .page-about .about-why__grid,
  .page-about .about-teams__grid,
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-why__aside,
  .page-about .about-teams__aside,
  .page-about .about-partners__aside {
    order: 2;
  }

  .page-about .about-partners__figure,
  .page-about .about-teams__figure {
    max-width: 640px;
  }

  .page-about .about-why__figure {
    max-width: 420px;
  }
}

@media (max-width: 560px) {
  .page-about .about-range__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-range__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
    text-align: center;
  }
}