.page-about {
  --ab-night-soft: rgba(244, 247, 243, .72);
  --ab-night-line: rgba(244, 247, 243, .13);
  --ab-paper-line: rgba(10, 15, 13, .14);
  --ab-paper-soft: #56645D;
  --ab-ink-mid: #2B3A33;
  display: block;
  background: var(--night);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--step-17);
  line-height: 1.8;
  padding-top: clamp(84px, 12vh, 136px);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .container-wide {
  width: 100%;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 0 0 18px;
}

.page-about .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--step-13);
  color: var(--haze);
}

.page-about .crumb a {
  color: var(--haze);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .crumb a:hover,
.page-about .crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumb[aria-current] {
  color: var(--paper);
}

/* 通用排版 */
.page-about h1,
.page-about h2,
.page-about h3,
.page-about h4 {
  font-family: var(--font-display);
  letter-spacing: -0.015em;
}

.page-about h1 {
  margin: 14px 0 20px;
  font-size: clamp(34px, 5.4vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  color: var(--paper);
}

.page-about h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 800;
  line-height: 1.2;
}

.page-about h3 {
  margin: 0;
  font-size: var(--step-20);
  font-weight: 700;
  line-height: 1.35;
}

.page-about h4 {
  margin: 0 0 6px;
  font-size: var(--step-17);
  font-weight: 700;
}

.page-about p {
  margin: 0 0 16px;
}

.page-about .section {
  padding: clamp(52px, 8vw, 100px) 0;
  position: relative;
}

.page-about .section-lede {
  max-width: 62ch;
  color: var(--ab-night-soft);
  font-size: var(--step-20);
  line-height: 1.7;
}

.page-about .section-head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .eyebrow {
  margin: 0 0 10px;
  font-size: var(--step-13);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cnan, var(--haze));
  color: var(--haze);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: 6px 0 clamp(44px, 7vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -10%;
  width: min(52vw, 640px);
  height: 360px;
  background: radial-gradient(circle at 70% 40%, rgba(53, 224, 208, .16), transparent 64%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .about-lede {
  max-width: 46ch;
  color: #D3DED8;
  font-size: var(--step-20);
  line-height: 1.72;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-facts {
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--grass) 0%, var(--night) 88%);
  padding: 24px 24px 12px;
  box-shadow: inset 0 1px 0 rgba(242, 193, 78, .22);
}

.page-about .about-facts-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
}

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

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--ab-night-line);
}

.page-about .about-fact:last-child {
  border-bottom: 0;
}

.page-about .about-fact-num {
  flex: 0 0 auto;
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-fact-label {
  font-size: var(--step-15);
  color: var(--ab-night-soft);
}

/* 品牌主张 */
.page-about .about-claim {
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--gold-line);
  border-bottom: 1px solid var(--gold-line);
}

.page-about .about-claim-grid {
  display: grid;
  gap: 26px;
}

.page-about .about-claim .eyebrow {
  color: var(--cyan-deep);
}

.page-about .claim-aside-note {
  font-size: var(--step-15);
  line-height: 1.7;
  color: var(--ab-paper-soft);
  border-left: 2px solid var(--gold);
  padding-left: 14px;
}

.page-about .about-claim h2 {
  color: var(--ink);
}

.page-about .about-claim-body p {
  max-width: 66ch;
  color: var(--ab-ink-mid);
}

.page-about .about-quote {
  margin: 26px 0 0;
  padding: 20px 22px;
  max-width: 62ch;
  border: 1px solid var(--ab-paper-line);
  border-left: 6px solid var(--gold);
  background: rgba(12, 36, 24, .04);
  font-family: var(--font-display);
  font-size: var(--step-20);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

/* 赛季演进 */
.page-about .era-grid {
  display: grid;
  gap: 28px;
}

.page-about .era-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .era-scale {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .era-scale a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: var(--step-15);
  color: var(--ab-night-soft);
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-about .era-scale .mono {
  font-family: var(--font-mono);
  font-size: var(--step-13);
  color: var(--gold);
}

.page-about .era-scale a:hover,
.page-about .era-scale a:focus-visible {
  background: rgba(20, 80, 58, .5);
  color: var(--paper);
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .era-foot {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--ab-night-line);
  border-radius: 10px;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--haze);
}

.page-about .era-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .era-item {
  padding: 18px 20px 18px 22px;
  border: 1px solid var(--ab-night-line);
  border-left: 3px solid var(--pitch);
  border-radius: 0 14px 14px 0;
  background: rgba(20, 80, 58, .18);
  scroll-margin-top: 160px;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .era-item:hover,
.page-about .era-item:focus,
.page-about .era-item:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold-line);
  border-left-color: var(--gold);
  background: rgba(20, 80, 58, .34);
}

.page-about .era-item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .era-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .era-mark {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--gold);
  color: var(--night);
  font-family: var(--font-mono);
  font-size: var(--step-15);
  font-weight: 700;
}

.page-about .era-title {
  font-size: var(--step-20);
}

.page-about .era-body {
  margin: 12px 0 0;
  font-size: var(--step-15);
  line-height: 1.75;
  color: var(--ab-night-soft);
}

.page-about .era-more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 320ms var(--ease), opacity 240ms var(--ease), margin-top 240ms var(--ease);
}

.page-about .era-more p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ab-night-line);
  font-size: var(--step-15);
  color: var(--haze);
}

.page-about .era-item:hover .era-more,
.page-about .era-item:focus .era-more,
.page-about .era-item:focus-within .era-more {
  max-height: 200px;
  opacity: 1;
  margin-top: 12px;
}

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

/* 图片容器 */
.page-about .figure {
  margin: 0;
}

.page-about .figure-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: var(--grass);
}

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

.page-about .figure-cap {
  margin-top: 10px;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--haze);
}

/* 团队 */
.page-about .about-team {
  background: var(--grass);
  border-top: 1px solid var(--ab-night-line);
  border-bottom: 1px solid var(--ab-night-line);
}

.page-about .team-head {
  max-width: 66ch;
}

.page-about .team-figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  padding: 22px 22px 24px;
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: var(--island);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.page-about .team-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-unit {
  margin-left: 4px;
  font-size: var(--step-15);
  color: var(--haze);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: var(--step-15);
  line-height: 1.75;
  color: var(--ab-night-soft);
}

.page-about .flow {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .flow-step {
  position: relative;
  padding: 18px 20px;
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: rgba(6, 17, 12, .5);
}

.page-about .flow-idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .flow-step p {
  margin: 0;
  font-size: var(--step-15);
  line-height: 1.75;
  color: var(--ab-night-soft);
}

/* 数据校验 */
.page-about .verify-grid {
  display: grid;
  gap: 30px;
}

.page-about .verify-svg-wrap {
  padding: 18px 16px;
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: rgba(12, 36, 24, .55);
}

.page-about .verify-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .v-line {
  fill: none;
  stroke: rgba(53, 224, 208, .55);
  stroke-width: 1.6;
  stroke-linecap: round;
}

.page-about .v-line-gold {
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .v-box {
  fill: rgba(20, 80, 58, .34);
  stroke: var(--ab-night-line);
  stroke-width: 1;
}

.page-about .v-box-core {
  fill: rgba(242, 193, 78, .14);
  stroke: var(--gold);
  stroke-width: 1.4;
}

.page-about .v-dot {
  fill: var(--gold);
}

.page-about .v-text {
  fill: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
}

.page-about .v-text-sm {
  fill: var(--haze);
  font-family: var(--font-body);
  font-size: 12.5px;
}

.page-about .verify-copy h2 {
  margin-bottom: 16px;
}

.page-about .verify-copy p {
  max-width: 58ch;
  color: var(--ab-night-soft);
}

.page-about .verify-points {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .verify-points li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px;
  border-left: 2px solid var(--pitch);
  background: rgba(20, 80, 58, .22);
  font-size: var(--step-15);
  color: var(--ab-night-soft);
}

.page-about .verify-points .mono {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  font-weight: 600;
  color: var(--cyan);
}

.page-about .verify-figure {
  margin: 0;
}

/* 合作与认可 */
.page-about .about-partners {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-partners .eyebrow {
  color: var(--cyan-deep);
}

.page-about .partners-grid {
  display: grid;
  gap: 26px;
}

.page-about .partners-main h2 {
  color: var(--ink);
}

.page-about .partners-main p {
  max-width: 62ch;
  color: var(--ab-ink-mid);
}

.page-about .partner-award {
  padding: 20px 22px;
  border: 1px solid var(--ab-paper-line);
  border-top: 4px solid var(--gold);
  background: rgba(242, 193, 78, .09);
}

.page-about .partner-award-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange-deep);
}

.page-about .partner-award-text {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-20);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .partner-note {
  margin: 18px 0 0;
  font-size: var(--step-13);
  line-height: 1.75;
  color: var(--ab-paper-soft);
}

/* 界面与术语 */
.page-about .about-design {
  background: var(--night);
}

.page-about .design-grid {
  display: grid;
  gap: 16px;
}

.page-about .design-item {
  padding: 22px 22px 24px;
  border: 1px solid var(--ab-night-line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(20, 80, 58, .4), rgba(23, 37, 30, .9));
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .design-item:hover,
.page-about .design-item:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.page-about .design-mark {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  border: 1px solid var(--ab-night-line);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .design-item p {
  margin: 10px 0 0;
  font-size: var(--step-15);
  line-height: 1.75;
  color: var(--ab-night-soft);
}

/* 结尾行动区 */
.page-about .about-cta {
  background: linear-gradient(140deg, var(--pitch) 0%, var(--grass) 42%, var(--night) 100%);
  border-top: 1px solid var(--gold-line);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-cta-copy h2 {
  margin-bottom: 12px;
}

.page-about .about-cta-copy p {
  max-width: 58ch;
  margin: 0;
  color: #CFDBD4;
  font-size: var(--step-17);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-cta-actions .btn {
  flex: 0 1 auto;
}

/* 平板及以上 */
@media (min-width: 700px) {
  .page-about .team-grid,
  .page-about .design-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .verify-points {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    padding-bottom: 24px;
  }

  .page-about .about-claim-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 56px;
  }

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

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

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

@media (min-width: 960px) {
  .page-about .era-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 60px;
  }

  .page-about .era-rail {
    position: sticky;
    top: 148px;
    align-self: start;
  }

  .page-about .verify-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .verify-figure {
    grid-column: 1 / -1;
    justify-self: center;
    width: min(100%, 560px);
  }
}

@media (min-width: 1100px) {
  .page-about .team-grid,
  .page-about .design-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about {
  --cnan: currentColor;
}