.page-about {
  --about-ink: #101828;
  --about-soft: #4B5468;
  --about-line: rgba(245, 197, 66, 0.22);
  --about-line-cool: rgba(91, 192, 235, 0.18);
  --about-card: rgba(255, 255, 255, 0.035);
  background: var(--sky-deep);
  color: var(--sky-white);
  overflow-x: clip;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(32px, 6vw, 80px);
  background:
    radial-gradient(circle at 82% 12%, rgba(123, 77, 255, 0.30), transparent 52%),
    radial-gradient(circle at 8% 78%, rgba(91, 192, 235, 0.16), transparent 56%),
    var(--sky-deep);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.6px 1.6px at 14% 22%, rgba(255, 255, 255, 0.65), transparent 100%),
    radial-gradient(1.4px 1.4px at 42% 8%, rgba(245, 197, 66, 0.7), transparent 100%),
    radial-gradient(1.8px 1.8px at 68% 34%, rgba(255, 255, 255, 0.45), transparent 100%),
    radial-gradient(1.3px 1.3px at 88% 62%, rgba(91, 192, 235, 0.7), transparent 100%),
    radial-gradient(1.5px 1.5px at 24% 74%, rgba(255, 255, 255, 0.35), transparent 100%);
  background-size: 100% 100%;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--sky-font-display);
  font-size: clamp(32px, 6.6vw, 66px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--sky-white);
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 46em;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stat {
  padding-top: 10px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__stat-num {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--sky-gold);
  letter-spacing: -0.01em;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-hero__visual {
  margin: 0;
  position: relative;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(245, 197, 66, 0.35);
  object-fit: cover;
  background: linear-gradient(160deg, rgba(123, 77, 255, 0.4), rgba(11, 27, 58, 0.9));
  box-shadow: 14px 18px 0 -6px rgba(245, 197, 66, 0.12), 0 24px 60px rgba(0, 0, 0, 0.45);
}

.page-about .about-hero__caption {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
  text-align: right;
}

.page-about .about-shell {
  display: grid;
  gap: clamp(22px, 3.5vw, 48px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

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

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sky-grey);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.24s var(--sky-ease), color 0.24s var(--sky-ease), background-color 0.24s var(--sky-ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--sky-gold);
  color: var(--sky-gold);
  background: rgba(245, 197, 66, 0.08);
  outline: none;
}

.page-about .about-rail__num {
  font-size: 11px;
  color: var(--sky-ice);
}

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 6vw, 76px);
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  min-width: 0;
}

.page-about .about-chapter__head {
  position: relative;
  margin-bottom: clamp(18px, 3vw, 30px);
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--sky-font-display);
  font-size: clamp(58px, 15vw, 140px);
  font-weight: 200;
  line-height: 0.78;
  letter-spacing: -0.06em;
  color: rgba(91, 192, 235, 0.16);
  user-select: none;
}

.page-about .about-chapter__title {
  position: relative;
  margin: -0.34em 0 0;
  font-family: var(--sky-font-display);
  font-size: clamp(24px, 4.6vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--sky-white);
}

.page-about .about-chapter__kicker {
  margin: 10px 0 0;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--sky-ice);
}

.page-about .about-chapter__body {
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .about-chapter__body p {
  margin: 0;
  max-width: 46em;
}

.page-about .about-prose {
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-note {
  padding: 14px 16px;
  border-left: 3px solid var(--sky-gold);
  background: rgba(245, 197, 66, 0.07);
  border-radius: 0 10px 10px 0;
}

.page-about .about-note p {
  margin: 0;
  max-width: none;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.88);
}

.page-about .about-inline-links {
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.7);
}

/* 星轨时间线 */
.page-about .about-track {
  position: relative;
  margin: 4px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--sky-gold), var(--sky-violet) 48%, rgba(91, 192, 235, 0.35) 100%);
}

.page-about .about-node {
  position: relative;
  margin-bottom: 14px;
  padding: 16px 18px 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: var(--about-card);
  transition: transform 0.26s var(--sky-ease), border-color 0.26s var(--sky-ease), background-color 0.26s var(--sky-ease);
}

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

.page-about .about-node:hover,
.page-about .about-node:focus,
.page-about .about-node:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(245, 197, 66, 0.6);
  background: rgba(123, 77, 255, 0.12);
  outline: none;
}

.page-about .about-node:focus-visible {
  box-shadow: 0 0 0 2px var(--sky-gold);
}

.page-about .about-node__dot {
  position: absolute;
  left: -27px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sky-deep);
  border: 2px solid var(--sky-gold);
  box-shadow: 0 0 0 4px rgba(245, 197, 66, 0.14);
}

.page-about .about-node__year {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--sky-gold);
}

.page-about .about-node__title {
  margin: 6px 0 0;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--sky-white);
}

.page-about .about-node__text {
  margin: 8px 0 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-node__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sky-ice);
  transition: max-height 0.32s var(--sky-ease), opacity 0.26s var(--sky-ease), margin-top 0.32s var(--sky-ease);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus .about-node__more,
.page-about .about-node:focus-visible .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  max-height: 220px;
  margin-top: 10px;
  opacity: 1;
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-about .about-team__text {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-team__text p {
  margin: 0;
  max-width: 44em;
}

.page-about .about-team__figure,
.page-about .about-archive {
  margin: 0;
}

.page-about .about-team__figure img,
.page-about .about-archive img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: linear-gradient(150deg, rgba(91, 192, 235, 0.28), rgba(11, 27, 58, 0.9));
}

.page-about .about-team__figure figcaption,
.page-about .about-archive figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--sky-grey);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.page-about .about-role__title {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--sky-white);
}

.page-about .about-role p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}

/* 暖纸资料面板 */
.page-about .about-chapter--paper {
  padding: clamp(20px, 4vw, 40px);
  border: 1px solid var(--sky-edge);
  border-radius: 20px;
  background: var(--sky-paper);
  color: var(--about-ink);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.38), 0 0 0 6px rgba(216, 203, 184, 0.16);
}

.page-about .about-chapter--paper .about-chapter__head {
  border-bottom-color: rgba(11, 27, 58, 0.16);
}

.page-about .about-chapter--paper .about-chapter__num {
  color: rgba(11, 27, 58, 0.12);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--about-ink);
}

.page-about .about-chapter--paper .about-chapter__kicker {
  color: #2C6E8F;
}

.page-about .about-chapter--paper .about-chapter__body {
  color: var(--about-soft);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  border: 1px solid var(--sky-edge);
  border-radius: 12px;
  background: #FFFFFF;
  box-shadow: 0 2px 0 0 var(--sky-edge);
  transition: transform 0.22s var(--sky-ease), box-shadow 0.22s var(--sky-ease), border-color 0.22s var(--sky-ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus,
.page-about .about-stat:focus-visible {
  transform: translateY(-3px);
  border-color: #E0B33A;
  box-shadow: 0 2px 0 0 #E0B33A, 0 10px 24px rgba(11, 27, 58, 0.14);
  outline: none;
}

.page-about .about-stat:focus-visible {
  box-shadow: 0 0 0 2px var(--sky-violet), 0 10px 24px rgba(11, 27, 58, 0.18);
}

.page-about .about-stat__num {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  color: #B48411;
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--about-ink);
}

.page-about .about-stat__hint {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-soft);
}

.page-about .about-paper-text {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-chapter--paper .sky-link {
  color: #2C6E8F;
  text-decoration-color: currentColor;
}

/* 更新节奏 */
.page-about .about-cadence {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-cadence__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-cadence__tag {
  justify-self: start;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(91, 192, 235, 0.45);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sky-ice);
}

.page-about .about-cadence__title {
  margin: 4px 0 0;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 700;
  color: var(--sky-white);
}

.page-about .about-cadence__text {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.74);
}

/* 长期合作 */
.page-about .about-why {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: why;
}

.page-about .about-why__item {
  padding: 16px 18px;
  border-left: 3px solid rgba(245, 197, 66, 0.6);
  border-radius: 0 12px 12px 0;
  background: linear-gradient(90deg, rgba(245, 197, 66, 0.08), rgba(245, 197, 66, 0));
}

.page-about .about-why__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--sky-white);
}

.page-about .about-why__item p {
  margin: 6px 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-cta__hint {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.62);
}

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-cadence__row {
    grid-template-columns: 90px minmax(0, 1fr);
    align-items: start;
    column-gap: 18px;
  }

  .page-about .about-cadence__tag {
    grid-row: 1 / span 2;
    align-self: start;
    margin-top: 2px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-hero__visual {
    transform: rotate(1.2deg);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: clamp(22px, 3vw, 38px);
  }

  .page-about .about-archive img {
    max-height: 340px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 108px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.12);
  }

  .page-about .about-rail__link {
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 8px 8px 0;
    white-space: normal;
    line-height: 1.4;
    color: rgba(255, 255, 255, 0.68);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--sky-gold);
    background: rgba(245, 197, 66, 0.06);
  }

  .page-about .about-chapter__num {
    font-size: clamp(96px, 11vw, 150px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-stat,
  .page-about .about-rail__link,
  .page-about .about-node__more,
  .page-about .about-hero__visual {
    transition: none;
    transform: none;
  }
}