.page-about {
  --about-line: rgba(37, 58, 99, 0.58);
}

.page-about .about-crumb {
  padding-top: var(--step-5);
}

/* ---------- 通用小标 ---------- */
.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--step-2);
  margin: 0 0 var(--step-3);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--cyan-500);
}

.page-about .about-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.page-about h2 {
  margin: 0 0 var(--step-4);
  font-size: 27px;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-1);
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: var(--step-2);
  margin-top: var(--step-3);
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease);
}

.page-about .about-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--cyan-300);
  border-bottom-color: currentColor;
}

.page-about .media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: var(--step-5);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--step-6);
}

.page-about .about-hero__title {
  margin: 0 0 var(--step-4);
  font-size: 38px;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--text-1);
}

.page-about .about-hero__accent {
  color: var(--gold-500);
}

.page-about .about-hero__lede {
  margin: 0 0 var(--step-5);
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-3);
}

.page-about .about-hero__aside {
  padding-top: var(--step-4);
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__aside-label {
  margin: 0 0 var(--step-3);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-3);
}

.page-about .about-hero__stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-600);
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__stats > div {
  background: var(--space-800);
  padding: var(--step-3);
}

.page-about .about-hero__stats dt {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.5;
}

.page-about .about-hero__stats dd {
  margin: var(--step-1) 0 0;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--gold-500);
}

.page-about .about-hero__stats dd small {
  margin-left: 4px;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-2);
}

.page-about .about-hero__figure {
  margin-top: var(--step-6);
  border: 1px solid var(--line-600);
}

.page-about .about-hero__figure .media__caption {
  padding: var(--step-3) var(--step-4);
  font-size: 13px;
  color: var(--text-3);
  border-top: 1px solid var(--line-600);
  background: var(--space-800);
}

/* ---------- 服务对象 ---------- */
.page-about .about-serve__head {
  margin-bottom: var(--step-5);
}

.page-about .about-serve__list {
  display: grid;
  gap: var(--step-4);
}

.page-about .about-serve__item {
  display: block;
  padding: var(--step-4);
}

.page-about .about-serve__item h3 {
  margin: var(--step-2) 0 var(--step-3);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-1);
}

.page-about .about-serve__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__head {
  display: grid;
  gap: var(--step-5);
  margin-bottom: var(--step-6);
}

.page-about .about-timeline__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-timeline__figure {
  border: 1px solid var(--line-600);
  max-width: 320px;
}

.page-about .about-timeline__body {
  position: relative;
}

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

.page-about .about-timeline__track {
  display: flex;
  gap: var(--step-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: var(--step-4);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-timeline__track::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline__track::-webkit-scrollbar-track {
  background: var(--space-900);
}

.page-about .about-timeline__track::-webkit-scrollbar-thumb {
  background: var(--line-600);
  border-radius: 3px;
}

.page-about .about-node {
  flex: 0 0 min(78vw, 272px);
  scroll-snap-align: start;
  padding: var(--step-4);
  background: var(--space-700);
  border: 1px solid var(--line-600);
  border-top: 2px solid var(--gold-500);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--t-state) var(--ease),
    background var(--t-state) var(--ease),
    transform var(--t-state) var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-visible {
  border-color: var(--cyan-500);
  border-top-color: var(--cyan-500);
  background: var(--space-800);
  transform: translateY(-4px);
}

.page-about .about-node__season {
  margin: 0 0 var(--step-2);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-500);
}

.page-about .about-node__title {
  margin: 0 0 var(--step-3);
  font-size: 18px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-1);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-timeline__hint {
  margin: var(--step-3) 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-3);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scale__grid {
  display: grid;
  gap: var(--step-5);
}

.page-about .about-scale__text {
  margin: 0 0 var(--step-3);
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-scale__matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-600);
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
}

.page-about .about-scale__matrix span {
  display: grid;
  place-items: center;
  aspect-ratio: 1.5 / 1;
  background: var(--space-800);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-3);
  transition: background var(--t-hover) var(--ease), color var(--t-hover) var(--ease);
}

.page-about .about-scale__matrix span:hover {
  background: var(--space-700);
  color: var(--cyan-500);
}

.page-about .about-scale__figures {
  list-style: none;
  margin: var(--step-6) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-600);
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-scale__figures li {
  background: var(--space-800);
  padding: var(--step-4);
}

.page-about .about-scale__num {
  display: block;
  font-size: 28px;
  font-weight: 600;
  color: var(--text-1);
}

.page-about .about-scale__num em {
  margin-left: 4px;
  font-style: normal;
  font-size: 13px;
  color: var(--text-2);
}

.page-about .about-scale__figures p {
  margin: var(--step-2) 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-3);
}

.page-about .about-scale__figure {
  margin-top: var(--step-6);
  border: 1px solid var(--line-600);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco__head {
  margin-bottom: var(--step-5);
}

.page-about .about-eco__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-eco__canvas {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-eco__svg {
  display: block;
  width: 100%;
  min-width: 680px;
  height: auto;
}

.page-about .about-eco__svg text {
  font-family: var(--font-sans);
}

.page-about .about-eco__link {
  fill: none;
  stroke: var(--line-600);
  stroke-width: 1;
  stroke-dasharray: 4 5;
}

.page-about .about-eco__hub {
  fill: var(--space-700);
  stroke: var(--gold-500);
  stroke-width: 1;
}

.page-about .about-eco__hub-text {
  font-size: 16px;
  font-weight: 700;
  fill: var(--gold-300);
  text-anchor: middle;
}

.page-about .about-eco__box {
  fill: var(--space-700);
  stroke: var(--line-600);
  stroke-width: 1;
}

.page-about .about-eco__dot--gold {
  fill: var(--gold-500);
}

.page-about .about-eco__dot--cyan {
  fill: var(--cyan-500);
}

.page-about .about-eco__dot--home {
  fill: var(--home);
}

.page-about .about-eco__name {
  font-size: 16px;
  font-weight: 700;
  fill: var(--text-1);
}

.page-about .about-eco__sub {
  font-size: 12.5px;
  fill: var(--text-3);
}

/* ---------- 团队 ---------- */
.page-about .about-team__list {
  list-style: none;
  margin: var(--step-5) 0 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--step-2) var(--step-4);
  padding: var(--step-4) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}

.page-about .about-team__size {
  font-size: 22px;
  font-weight: 600;
  color: var(--cyan-500);
  text-align: right;
}

.page-about .about-team__size em {
  margin-left: 3px;
  font-style: normal;
  font-size: 12px;
  color: var(--text-3);
}

.page-about .about-team__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ---------- 认证与承诺 ---------- */
.page-about .about-trust__grid {
  display: grid;
  gap: var(--step-5);
}

.page-about .about-trust__text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

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

.page-about .about-trust__list li {
  display: grid;
  gap: var(--step-1);
  padding: var(--step-4) 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-trust__list strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
}

.page-about .about-trust__list span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: var(--step-5);
  padding: var(--step-6) var(--step-5);
  background: var(--space-700);
  border: 1px solid var(--line-600);
  border-left: 3px solid var(--gold-500);
  border-radius: var(--radius);
}

.page-about .about-cta__text h2 {
  margin-bottom: var(--step-3);
  font-size: 24px;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-3);
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__title {
    font-size: 52px;
  }

  .page-about h2 {
    font-size: 32px;
  }

  .page-about .about-timeline__head {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }

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

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

  .page-about .about-team__row {
    grid-template-columns: 180px 96px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--step-5);
  }

  .page-about .about-team__desc {
    grid-column: 3;
    margin-top: 0;
  }

  .page-about .about-trust__list li {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--step-4);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: end;
    gap: var(--step-7);
  }

  .page-about .about-hero__aside {
    border-top: 0;
    border-left: 1px solid var(--about-line);
    padding-top: 0;
    padding-left: var(--step-5);
  }

  .page-about .about-serve__list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--step-5) var(--step-4);
  }

  .page-about .about-serve__item:nth-child(1) {
    grid-column: 1 / 6;
  }

  .page-about .about-serve__item:nth-child(2) {
    grid-column: 7 / 13;
    margin-top: var(--step-6);
  }

  .page-about .about-serve__item:nth-child(3) {
    grid-column: 1 / 7;
    margin-top: var(--step-5);
  }

  .page-about .about-serve__item:nth-child(4) {
    grid-column: 8 / 13;
    margin-top: calc(var(--step-6) + var(--step-5));
  }

  .page-about .about-timeline__body {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: var(--step-5);
  }

  .page-about .about-timeline__rail {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: var(--step-4) 0;
  }

  .page-about .about-timeline__rail::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--line-600) 10%, var(--line-600) 90%, transparent);
  }

  .page-about .about-timeline__tick {
    position: relative;
    width: 11px;
    height: 11px;
    background: var(--space-800);
    border: 1px solid var(--cyan-500);
    transform: rotate(45deg);
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: var(--step-7);
    align-items: start;
  }

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

  .page-about .about-trust__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: var(--step-7);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: var(--step-7) var(--step-6);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    font-size: 76px;
  }

  .page-about h2 {
    font-size: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-link,
  .page-about .about-scale__matrix span {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-node:focus-visible {
    transform: none;
  }
}