.page-about {
  --about-shift: 8px;
  --about-ink: #141A33;
  --about-muted: #56607A;
  --about-hair: rgba(138, 147, 172, 0.28);
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

.page-about h2 {
  font-size: clamp(28px, 5.6vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
  margin: 0 0 18px;
}

.page-about h3 {
  font-size: clamp(18px, 3.4vw, 24px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}

.page-about .prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.75;
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(24px, 5vw, 48px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  align-items: center;
  margin-bottom: clamp(24px, 5vw, 44px);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumb__item {
  color: var(--slate);
  text-decoration: none;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 8px;
  color: var(--orange);
}

.page-about a.breadcrumb__item:hover {
  color: var(--teal);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-hero h1 {
  font-size: clamp(33px, 8.2vw, 70px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 900;
  margin: 10px 0 0;
}

.page-about .about-hero__hl {
  color: var(--teal);
  box-shadow: inset 0 -0.18em 0 rgba(255, 122, 26, 0.5);
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 2.6vw, 17px);
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-hero__cta {
  margin-top: 26px;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
}

.page-about .about-stat {
  border-left: 3px solid var(--teal);
  padding-left: 14px;
}

.page-about .about-stat:nth-child(2),
.page-about .about-stat:nth-child(4) {
  border-left-color: var(--orange);
}

.page-about .about-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5.6vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--teal-soft);
}

.page-about .about-stat:nth-child(2) b,
.page-about .about-stat:nth-child(4) b {
  color: var(--orange-soft);
}

.page-about .about-stat span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 我们是谁 ---------- */

.page-about .about-intro {
  background: linear-gradient(135deg, var(--violet) 0%, var(--ink) 58%);
  padding-block: clamp(52px, 8vw, 92px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-intro__body h2 {
  max-width: 20ch;
}

.page-about .about-intro__body .prose {
  max-width: 62ch;
}

.page-about .about-intro__body .punch {
  margin: 22px 0 0;
}

.page-about .about-intro__aside {
  border-left: 2px solid var(--orange);
  padding-left: 18px;
}

.page-about .about-intro__aside-title {
  margin: 0 0 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .about-intro__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-intro__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.page-about .about-intro__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 团队构成 ---------- */

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

.page-about .about-team .section-label {
  color: var(--about-muted);
}

.page-about .about-team h2,
.page-about .about-team h3 {
  color: var(--about-ink);
}

.page-about .about-team .prose p {
  color: var(--about-muted);
  max-width: 60ch;
}

.page-about .about-team__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-team__roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
  padding: 18px 18px 18px 16px;
  background: #FFFFFF;
  border: 2px solid var(--about-ink);
  border-left-width: 6px;
  border-left-color: var(--teal);
  box-shadow: 4px 4px 0 rgba(20, 26, 51, 0.12);
  transition: transform var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease);
}

.page-about .about-role:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-role:nth-child(3) {
  border-left-color: var(--violet);
}

.page-about .about-role:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(20, 26, 51, 0.18);
}

.page-about .about-role__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--about-muted);
}

.page-about .about-role h3 {
  grid-column: 2;
  margin: 0 0 6px;
  font-size: 19px;
}

.page-about .about-role p {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-muted);
}

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

.page-about .about-team__media img,
.page-about .about-flow__media img,
.page-about .about-root__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 内容生产流程 ---------- */

.page-about .about-flow {
  background: linear-gradient(180deg, var(--ink) 0%, #0E1430 100%);
  padding-block: clamp(52px, 8vw, 92px);
}

.page-about .about-flow .lede {
  margin: 0;
  max-width: 60ch;
}

.page-about .about-flow__steps {
  display: grid;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-flow__step {
  padding: 22px 18px 20px;
  background: linear-gradient(160deg, rgba(34, 16, 70, 0.78), rgba(11, 16, 38, 0.92));
  border: 2px solid var(--about-hair);
  border-top: 3px solid var(--teal);
}

.page-about .about-flow__step:nth-of-type(even) {
  border-top-color: var(--orange);
}

.page-about .about-flow__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.page-about .about-flow__step h3 {
  font-size: 20px;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-flow__arrow {
  display: none;
}

.page-about .about-flow__media {
  margin: 36px 0 0;
}

/* ---------- 发展历程 ---------- */

.page-about .about-history {
  background: linear-gradient(180deg, #0E1430 0%, var(--violet) 100%);
  padding-block: clamp(52px, 8vw, 92px);
}

.page-about .about-history__grid {
  display: grid;
  gap: 28px;
  margin-top: 34px;
}

.page-about .about-history__nav {
  position: static;
}

.page-about .about-history__nav .toc__title {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.page-about .about-history__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-history__link {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  padding: 10px 10px 10px 12px;
  font-size: 13.5px;
  color: var(--slate);
  text-decoration: none;
  border-left: 2px solid var(--about-hair);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-history__link .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-history__link:hover {
  color: var(--text);
  border-left-color: var(--teal);
}

.page-about .about-history__link[aria-current="true"] {
  color: var(--text);
  border-left-color: var(--orange);
  background: rgba(255, 122, 26, 0.1);
}

.page-about .about-history__stage {
  padding: 44px 0;
  border-bottom: 2px dashed var(--about-hair);
}

.page-about .about-history__stage:first-child {
  padding-top: 0;
}

.page-about .about-history__stage:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-history__num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(42px, 10vw, 74px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: rgba(18, 225, 195, 0.5);
  -webkit-text-stroke: 1.5px var(--teal);
}

.page-about .about-history__stage h3 {
  font-size: clamp(19px, 3.6vw, 27px);
  max-width: 26ch;
}

.page-about .about-history__stage p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-history__quote {
  margin: 0 0 8px;
  padding-left: 18px;
  border-left: 4px solid var(--orange);
  font-size: clamp(20px, 4.4vw, 30px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--teal-soft);
  max-width: 22ch;
}

/* ---------- 合作生态 ---------- */

.page-about .about-collab {
  background: var(--ink);
  padding-block: clamp(52px, 8vw, 92px);
}

.page-about .about-collab .lede {
  margin: 0;
  max-width: 60ch;
}

.page-about .about-collab__grid {
  display: grid;
  gap: 24px;
  margin-top: 34px;
}

.page-about .about-collab__card {
  position: relative;
  padding: 24px 20px 22px;
  background: rgba(34, 16, 70, 0.6);
  border: 2px solid var(--teal);
  box-shadow: var(--about-shift) var(--about-shift) 0 0 var(--black);
  transition: transform var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease), background-color var(--dur-mid) var(--ease);
}

.page-about .about-collab__card:nth-child(2) {
  border-color: var(--orange);
}

.page-about .about-collab__card:nth-child(3) {
  border-color: var(--teal-soft);
}

.page-about .about-collab__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: calc(var(--about-shift) + 3px) calc(var(--about-shift) + 3px) 0 0 var(--teal);
  background: rgba(34, 16, 70, 0.85);
}

.page-about .about-collab__k {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--yellow);
}

.page-about .about-collab__card h3 {
  font-size: 21px;
}

.page-about .about-collab__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text);
}

.page-about .about-collab__meta {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 2px dashed var(--about-hair);
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.06em;
  color: var(--slate) !important;
}

.page-about .about-collab__honor {
  margin-top: 40px;
  padding: 22px 20px;
  border: 2px solid var(--yellow);
  background: rgba(245, 230, 99, 0.07);
}

.page-about .about-collab__honor-k {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--yellow);
}

.page-about .about-collab__honor-text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-collab__honor-text a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
}

.page-about .about-collab__honor-text a:hover {
  color: var(--orange-soft);
}

/* ---------- 辽宁根基 ---------- */

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

.page-about .about-root .section-label {
  color: var(--about-muted);
}

.page-about .about-root h2 {
  color: var(--about-ink);
  max-width: 18ch;
}

.page-about .about-root .prose p {
  color: var(--about-muted);
  max-width: 60ch;
}

.page-about .about-root__grid {
  display: grid;
  gap: 30px;
}

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

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding-block: clamp(44px, 7vw, 76px);
}

.page-about .about-next__box {
  padding: 30px 22px 32px;
  border: 3px solid var(--teal);
  background: linear-gradient(135deg, rgba(18, 225, 195, 0.1), rgba(255, 122, 26, 0.1) 70%, rgba(34, 16, 70, 0.5));
  box-shadow: 12px 12px 0 var(--black);
}

.page-about .about-next__box h2 {
  font-size: clamp(24px, 4.6vw, 38px);
  margin-bottom: 14px;
}

.page-about .about-next__box p {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-collab__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-flow__steps {
    grid-template-columns: minmax(0, 1fr) 32px minmax(0, 1fr) 32px minmax(0, 1fr) 32px minmax(0, 1fr);
    gap: 0;
    align-items: stretch;
  }

  .page-about .about-flow__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--teal);
  }

  .page-about .about-history__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 68px;
    align-items: start;
  }

  .page-about .about-history__nav {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

  .page-about .about-collab__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-root__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-next__box {
    padding: 42px 40px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-collab__card,
  .page-about .about-history__link {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-collab__card:hover {
    transform: none;
  }
}