.page-about {
  background: var(--ink);
  color: var(--mint);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .breadcrumb {
  margin-top: clamp(16px, 2.4vw, 26px);
  margin-bottom: clamp(16px, 3vw, 28px);
  font-size: 12.5px;
  letter-spacing: 0.05em;
}

/* ---------- 首屏框景 ---------- */
.page-about .hero {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 95% at 84% 4%, rgba(200, 255, 77, 0.1), transparent 58%),
    radial-gradient(90% 80% at 6% 96%, rgba(255, 138, 61, 0.07), transparent 60%),
    linear-gradient(180deg, var(--ink), var(--pitch));
  padding: clamp(26px, 4.4vw, 56px) 0 clamp(28px, 4.6vw, 60px);
}

.page-about .hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 48px);
  align-items: start;
}

.page-about .hero__copy {
  min-width: 0;
}

.page-about .hero__title {
  font-family: var(--font-display);
  font-size: clamp(31px, 5.4vw, 60px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0.01em;
  margin: 12px 0 0;
  color: var(--mint);
  max-width: 20em;
}

.page-about .hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--muted);
  max-width: 34em;
}

.page-about .hero__lead--sub {
  margin-top: 12px;
  color: var(--steel);
  font-size: clamp(14px, 1.5vw, 16px);
}

.page-about .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .hero__frame {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--pitch);
  overflow: hidden;
}

.page-about .hero__frame::before,
.page-about .hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--lime);
  pointer-events: none;
  z-index: 2;
}

.page-about .hero__frame::before {
  top: 9px;
  left: 9px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .hero__frame::after {
  right: 9px;
  bottom: 9px;
  border-left: 0;
  border-top: 0;
}

.page-about .media {
  display: block;
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--pitch);
}

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

.page-about .hero__frame .media__img {
  aspect-ratio: 16 / 10;
}

/* ---------- 规模刻度带 ---------- */
.page-about .hero-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .hero-strip__item {
  background: var(--pitch);
  padding: 16px clamp(12px, 2.2vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .hero-strip__num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.2vw, 31px);
  font-weight: 600;
  line-height: 1.05;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-strip__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 72px);
}

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

.page-about .about-index__title {
  margin: 0 0 14px;
  color: var(--lime);
}

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

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  padding-left: 18px;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.page-about .about-canvas {
  min-width: 0;
}

/* ---------- 章节公用 ---------- */
.page-about .chapter {
  padding: clamp(26px, 4vw, 48px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

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

.page-about .chapter__head {
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-about .chapter__title {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--mint);
}

.page-about .chapter__lead {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 36em;
}

.page-about .chapter__foot {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 14px 0 0 16px;
  border-left: 2px solid var(--lime);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 38em;
}

.page-about .chapter__kicker {
  margin: clamp(22px, 3.4vw, 32px) 0 12px;
  font-size: 14px;
  color: var(--mint);
}

.page-about .chapter__media {
  margin: clamp(18px, 3vw, 28px) 0;
}

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

.page-about .media--wide .media__img {
  aspect-ratio: 16 / 9;
}

.page-about .inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 77, 0.45);
  padding-bottom: 1px;
}

.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 四步动线 ---------- */
.page-about .route {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .route__step {
  position: relative;
  padding: 16px 0 16px 46px;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .route__step:hover {
  background: rgba(23, 56, 44, 0.35);
  transform: translateX(3px);
}

.page-about .route__no {
  position: absolute;
  left: 0;
  top: 19px;
  color: var(--orange);
}

.page-about .route__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-about .route__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 规模列表 ---------- */
.page-about .scale-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .scale-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  transition: background 0.25s var(--ease);
}

.page-about .scale-row:hover {
  background: rgba(23, 56, 44, 0.4);
}

.page-about .scale-row__num {
  grid-row: 1 / span 2;
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 29px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .scale-row__label {
  grid-column: 2;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--mint);
}

.page-about .scale-row__note {
  grid-column: 2;
  margin-top: 5px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 项目图例 ---------- */
.page-about .project-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .project-legend__item {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  padding: 7px 14px;
  border: 1px solid var(--line);
  color: var(--steel);
  cursor: default;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .project-legend__item:hover {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  transform: translateY(-2px);
}

/* ---------- 节奏列表 ---------- */
.page-about .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .rhythm-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  transition: border-color 0.25s var(--ease);
}

.page-about .rhythm-item:hover {
  border-top-color: var(--lime);
}

.page-about .rhythm-item__key {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.09em;
}

.page-about .rhythm-item__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mint);
}

.page-about .rhythm-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 团队比分牌 ---------- */
.page-about .team-board {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-cell {
  background: var(--pitch);
  padding: clamp(14px, 2.4vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  transition: background 0.25s var(--ease);
}

.page-about .team-cell:hover {
  background: var(--line);
}

.page-about .team-cell--total {
  background: linear-gradient(160deg, rgba(200, 255, 77, 0.14), rgba(12, 33, 26, 0.9));
}

.page-about .team-cell__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .team-cell--total .team-cell__num {
  color: var(--orange);
}

.page-about .team-cell__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--mint);
}

.page-about .team-cell__note {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .partner {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: rgba(12, 33, 26, 0.6);
}

.page-about .partner__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mint);
}

.page-about .partner__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42em;
}

.page-about .partner__text + .partner__text {
  margin-top: 10px;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), var(--line) 70%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 28px) 32px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 1px solid var(--lime);
  background: var(--ink);
  transform: rotate(45deg);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--lime);
  transform: rotate(45deg) scale(1.15);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
}

.page-about .timeline__title {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mint);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 38em;
}

/* ---------- 荣誉 ---------- */
.page-about .award-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .award {
  background: var(--pitch);
  padding: clamp(18px, 2.8vw, 26px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .award__year {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .award__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mint);
  line-height: 1.45;
}

.page-about .award__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 服务原则 ---------- */
.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .principle {
  position: relative;
  padding: 16px 0 16px 44px;
  border-top: 1px solid var(--line);
}

.page-about .principle__no {
  position: absolute;
  left: 0;
  top: 19px;
  color: var(--steel);
}

.page-about .principle__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mint);
}

.page-about .principle__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 收束 ---------- */
.page-about .closing {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 120% at 100% 0, rgba(200, 255, 77, 0.12), transparent 62%),
    var(--pitch);
}

.page-about .closing__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0 0 12px;
  color: var(--mint);
}

.page-about .closing__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

.page-about .closing__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .closing__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 77, 0.4);
  padding-bottom: 2px;
}

.page-about .closing__link:hover,
.page-about .closing__link:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .award {
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: start;
    column-gap: 18px;
  }

  .page-about .award__year {
    grid-row: 1 / span 2;
  }

  .page-about .rhythm-item {
    grid-template-columns: 170px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
  }

  .page-about .rhythm-item__key {
    padding-top: 3px;
  }
}

@media (min-width: 760px) {
  .page-about .hero-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .scale-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }

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

@media (min-width: 960px) {
  .page-about .hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-body {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-about .principle-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 3vw, 44px);
  }

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

@media (min-width: 1100px) {
  .page-about .scale-row {
    grid-template-columns: 96px minmax(0, 1fr);
  }

  .page-about .hero__title {
    max-width: 15em;
  }
}