.page-about {
  background: var(--night);
  color: var(--warm);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  color: var(--white);
  margin: 0;
}

.page-about p {
  margin: 0;
}

/* 面包屑 */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--white);
}

.page-about .breadcrumbs__sep {
  opacity: 0.55;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(26px, 4vw, 54px);
  padding-bottom: clamp(44px, 6vw, 82px);
  background: linear-gradient(165deg, var(--ink-green), var(--night) 68%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 82%;
  background: radial-gradient(55% 60% at 80% 10%, rgba(255, 90, 31, 0.2), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -60px;
  width: 230px;
  height: 230px;
  background: repeating-linear-gradient(115deg, rgba(61, 245, 208, 0.14) 0 2px, transparent 2px 12px);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 48px);
}

.page-about .about-hero__title {
  font-size: clamp(36px, 6.4vw, 74px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-top: 14px;
}

.page-about .eyebrow {
  margin: 0 0 6px;
}

.page-about .about-hero__lead {
  margin-top: 22px;
  max-width: 56ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--warm);
}

.page-about .about-hero__sub {
  margin-top: 14px;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 首屏速览面板 */
.page-about .about-index {
  background: rgba(8, 13, 10, 0.62);
  border: 1px solid var(--line);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-index__title {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ember);
  text-transform: uppercase;
}

.page-about .about-index__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .about-index__key {
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-index__val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* 章节骨架 */
.page-about .about-sec {
  position: relative;
}

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

.page-about .about-sec--night {
  background: var(--night);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--ember);
  padding-top: 8px;
}

.page-about .about-chapter__title {
  font-size: clamp(26px, 4.2vw, 46px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-chapter__intro {
  margin-top: 14px;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--warm);
}

/* 通栏图片 */
.page-about .about-figure {
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
}

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

/* 主场三落点 */
.page-about .about-points {
  margin-top: clamp(22px, 4vw, 40px);
  border-top: 1px solid var(--line);
}

.page-about .about-point {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-point__key {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-about .about-point__key::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  background: var(--ember);
  vertical-align: middle;
  transform: skewX(-30deg);
}

.page-about .about-point__desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--warm);
  max-width: 66ch;
}

/* 内容链路 */
.page-about .about-chain__layout {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .about-chain__figure {
  margin: 0;
  padding: 18px 8px;
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(21, 58, 42, 0.72), rgba(8, 13, 10, 0.4));
}

.page-about .about-chain__svg {
  display: block;
  width: 100%;
  min-width: 660px;
  height: auto;
}

.page-about .about-chain__no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  fill: var(--cyan);
}

.page-about .about-chain__label {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  fill: var(--white);
}

.page-about .about-chain__node path {
  transition: fill 0.2s var(--ease), stroke 0.2s var(--ease);
}

.page-about .about-chain__node:hover path {
  fill: rgba(255, 90, 31, 0.16);
  stroke: var(--ember);
  stroke-opacity: 1;
}

.page-about .about-chain__steps {
  display: grid;
  gap: 0;
  margin-top: 26px;
}

.page-about .about-chain__step {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chain__step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-chain__step h3 {
  margin-top: 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
}

.page-about .about-chain__step p {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--warm);
}

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

.page-about .about-chain__aside .about-figure {
  aspect-ratio: 3 / 2;
}

.page-about .about-chain__side-note {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--steel);
  border-left: 2px solid var(--cyan-line);
  padding-left: 14px;
}

/* 团队矩阵 */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-team__cell {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--pitch);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-team__cell--lead {
  background: linear-gradient(150deg, rgba(255, 90, 31, 0.16), rgba(21, 58, 42, 0.92) 62%);
  box-shadow: inset 3px 0 0 var(--ember);
}

.page-about .about-team__role {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-about .about-team__num {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__num span {
  margin-left: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--cyan);
}

.page-about .about-team__desc {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--warm);
}

/* 发展阶段时间轴 */
.page-about .about-timeline {
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-timeline .acc-item {
  position: relative;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline .acc-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 24px;
  width: 9px;
  height: 9px;
  background: var(--night);
  border: 2px solid var(--ember);
  transform: rotate(45deg);
}

.page-about .about-tl__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .acc-trigger {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.page-about .about-tl__trigger {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  padding: 18px 30px 18px 0;
  align-items: baseline;
}

.page-about .about-tl__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-tl__name {
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  line-height: 1.4;
}

.page-about .about-tl__sum {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-tl__mark {
  position: absolute;
  right: 6px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--ember);
  border-bottom: 2px solid var(--ember);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease);
}

.page-about .acc-trigger[aria-expanded="true"] .about-tl__mark {
  transform: rotate(-135deg);
}

.page-about .acc-trigger:hover .about-tl__name {
  color: var(--cyan);
}

.page-about .about-tl__body {
  padding: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--warm);
  max-width: 66ch;
}

/* 合作生态 */
.page-about .about-eco {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-eco__item {
  padding: 24px 22px 26px;
  border-top: 3px solid var(--ember);
  background: rgba(8, 13, 10, 0.5);
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 800;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-eco__num span {
  margin-left: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--cyan);
}

.page-about .about-eco__item h3 {
  margin-top: 12px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .about-eco__item p {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--warm);
}

.page-about .about-eco__extra {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  padding: 22px;
  background: var(--pitch);
  border-left: 3px solid var(--cyan-line);
}

.page-about .about-eco__extra-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.04em;
}

.page-about .about-eco__extra-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--warm);
}

/* 数据面板 */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 4vw, 36px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  padding: 24px 20px;
  background: var(--night);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__num span {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--white);
}

.page-about .about-stat__label {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--warm);
}

.page-about .about-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 22px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--steel);
}

/* 运营地址 */
.page-about .about-place {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-place__figure {
  margin: 0;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

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

.page-about .about-place__info {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .about-legend {
  display: grid;
  border-left: 2px solid var(--cyan-line);
  padding-left: 18px;
}

.page-about .about-legend__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 14px;
}

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

.page-about .about-legend__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-about .about-legend__val {
  color: var(--white);
  line-height: 1.65;
  word-break: break-word;
}

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

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ember);
}

.page-about .about-contact__val {
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--white);
  word-break: break-word;
}

/* 结尾行动条 */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--pitch), var(--ink-green) 70%);
  border-top: 1px solid var(--line);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(255, 90, 31, 0.1) 0 3px, transparent 3px 18px);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-cta__title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .about-cta__lead {
  margin-top: 12px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm);
}

.page-about .about-cta .about-hero__actions {
  margin-top: 0;
}

/* 响应式 */
@media (max-width: 639px) {
  .page-about .about-figure {
    aspect-ratio: 4 / 3;
  }

  .page-about .about-place__figure {
    aspect-ratio: 4 / 3;
  }

  .page-about .about-legend__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-chain__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }

  .page-about .about-chain__step:nth-child(1),
  .page-about .about-chain__step:nth-child(2) {
    border-top: 2px solid var(--cyan-line);
  }
}

@media (min-width: 760px) {
  .page-about .about-tl__trigger {
    grid-template-columns: 56px 220px minmax(0, 1fr) 24px;
    align-items: center;
    padding-right: 0;
  }

  .page-about .about-tl__sum {
    grid-column: auto;
  }

  .page-about .about-tl__mark {
    position: static;
    justify-self: end;
  }

  .page-about .about-eco__extra {
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: 26px;
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .about-point {
    grid-template-columns: 176px minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
  }

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

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) auto;
    align-items: center;
    column-gap: 40px;
  }
}

@media (min-width: 880px) {
  .page-about .about-team {
    grid-template-columns: 1.45fr 1fr 1fr;
  }

  .page-about .about-team__cell--lead {
    grid-column: 1;
    grid-row: 1 / 3;
  }

  .page-about .about-team__cell--wide {
    grid-column: 2 / 4;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter__head {
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 30px;
    align-items: start;
  }

  .page-about .about-place {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.84fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-chain__layout {
    grid-template-columns: minmax(0, 2.05fr) minmax(260px, 0.95fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__mark,
  .page-about .about-chain__node path,
  .page-about .breadcrumbs a {
    transition: none;
  }
}