.page-about {
  --about-gap: clamp(22px, 3.4vw, 40px);
  --about-ink-soft: rgba(233, 245, 240, 0.78);
  --about-rail: rgba(53, 240, 208, 0.28);
  --about-deep: #0A2018;
}

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  padding: clamp(22px, 4vw, 46px) 0 clamp(28px, 4.6vw, 56px);
}

.page-about .about-lead__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3.6vw, 34px);
}

@media (min-width: 900px) {
  .page-about .about-lead__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.72fr);
    align-items: end;
  }
}

.page-about .about-lead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.012em;
  margin: 14px 0 0;
  max-width: 15em;
  color: var(--fog);
}

.page-about .about-lead .lede {
  margin-top: 18px;
  max-width: 680px;
}

.page-about .about-lead__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-lead__panel {
  padding: clamp(18px, 2.4vw, 26px);
}

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

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line-soft);
}

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

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

.page-about .about-facts__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl__head {
  max-width: 720px;
}

.page-about .about-tl__grid {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  margin-top: clamp(28px, 4vw, 44px);
}

@media (min-width: 980px) {
  .page-about .about-tl__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.82fr);
    align-items: start;
  }
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 6px 0 0 44px;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(180deg, rgba(53, 240, 208, 0.55), rgba(53, 240, 208, 0.18) 62%, rgba(53, 240, 208, 0.04));
}

.page-about .tl__item {
  position: relative;
  margin-bottom: clamp(24px, 3.2vw, 34px);
}

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

.page-about .tl__node {
  position: absolute;
  left: -44px;
  top: 24px;
  width: 14px;
  height: 14px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(53, 240, 208, 0.42);
}

.page-about .tl__node--now {
  border-color: var(--flare);
  box-shadow: 0 0 14px rgba(255, 91, 46, 0.5);
}

.page-about .tl__card {
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .tl__card:hover,
.page-about .tl__card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.32);
}

.page-about .tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.page-about .tl__card h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 1.72vw, 24px);
  line-height: 1.25;
  margin: 8px 0 10px;
  color: var(--fog);
}

.page-about .tl__card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--about-ink-soft);
}

@media (min-width: 760px) {
  .page-about .tl__item:nth-child(even) .tl__card {
    width: calc(100% - clamp(0px, 5vw, 62px));
    margin-left: clamp(0px, 5vw, 62px);
  }
}

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

@media (min-width: 980px) {
  .page-about .about-tl__figure {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 数据链路 ---------- */
.page-about .about-source__head {
  max-width: 740px;
}

.page-about .flow {
  margin-top: clamp(26px, 3.8vw, 42px);
}

.page-about .flow__track {
  display: block;
  width: 100%;
  height: 20px;
  margin-bottom: 20px;
}

.page-about .flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

@media (min-width: 760px) {
  .page-about .flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .flow__idx {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .flow__step h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.62vw, 22px);
  line-height: 1.24;
  margin: 0 0 9px;
  color: var(--fog);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--about-ink-soft);
}

.page-about .about-source__note {
  margin-top: clamp(30px, 4.2vw, 50px);
  align-items: start;
}

.page-about .about-note {
  padding: clamp(20px, 2.6vw, 30px);
}

.page-about .about-note h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 1.6vw, 23px);
  line-height: 1.24;
  margin: 0 0 10px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  max-width: 760px;
}

.page-about .team-filter {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .team-cards {
  margin-top: 22px;
}

.page-about .team-card {
  padding: clamp(18px, 2.4vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3);
}

.page-about .team-card__role {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .team-card h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.5vw, 21px);
  line-height: 1.26;
  margin: 0;
  color: var(--fog);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--about-ink-soft);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partner__head {
  max-width: 700px;
}

.page-about .about-partner__grid {
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-about .partner-card {
  padding: clamp(20px, 2.6vw, 30px);
}

.page-about .partner-card__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .partner-card h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 1.7vw, 24px);
  line-height: 1.24;
  margin: 0 0 10px;
  color: var(--fog);
}

.page-about .partner-card p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .award-band {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

@media (min-width: 760px) {
  .page-about .award-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .award-band__item {
  background: var(--panel-deep);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .award-band__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--flare);
}

.page-about .award-band__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.45vw, 20px);
  line-height: 1.3;
  color: var(--fog);
}

.page-about .award-band__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 使用场景（浅色分区） ---------- */
.page-about .about-scene {
  color: var(--about-deep);
}

.page-about .about-scene .eyebrow {
  color: #0F6B5E;
}

.page-about .about-scene .eyebrow::before {
  background: #0F6B5E;
}

.page-about .about-scene__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

@media (min-width: 900px) {
  .page-about .about-scene__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: center;
  }
}

.page-about .about-scene h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  color: var(--about-deep);
}

.page-about .about-scene__intro {
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: 16px;
  line-height: 1.82;
  color: #2A4A40;
  max-width: 660px;
}

.page-about .scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .scene-list__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding-top: clamp(16px, 2vw, 22px);
  border-top: 1px solid rgba(10, 32, 24, 0.16);
}

.page-about .scene-list__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .scene-list__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: #0F6B5E;
  padding-top: 4px;
}

.page-about .scene-list__item h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.55vw, 21px);
  line-height: 1.28;
  margin: 0 0 7px;
  color: var(--about-deep);
}

.page-about .scene-list__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: #2A4A40;
}

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

/* ---------- 行动区 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
}

@media (min-width: 880px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) auto;
  }
}

.page-about .about-cta__copy h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.14;
  margin: 12px 0 12px;
  color: var(--fog);
}

.page-about .about-cta__copy p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-ink-soft);
  max-width: 620px;
}

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

/* ---------- 图片容器 ---------- */
.page-about .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

@media (max-width: 620px) {
  .page-about .tl {
    padding-left: 34px;
  }

  .page-about .tl::before {
    left: 5px;
  }

  .page-about .tl__node {
    left: -34px;
    top: 22px;
    width: 12px;
    height: 12px;
  }

  .page-about .scene-list__item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }
}