.page-about {
  --about-line: rgba(168, 218, 220, 0.22);
  --about-line-strong: rgba(168, 218, 220, 0.38);
  --about-panel: rgba(7, 30, 43, 0.42);
  --about-panel-raise: rgba(11, 79, 108, 0.46);
  overflow-wrap: break-word;
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumbs {
  padding-block: clamp(0.9rem, 2.5vw, 1.4rem) 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .breadcrumbs a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.page-about .index-label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .section-head {
  margin-bottom: clamp(1.4rem, 3.5vw, 2.4rem);
}

.page-about .section-head__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 0.55rem;
}

.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .section-head__note {
  margin: 0.7rem 0 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  gap: clamp(1.8rem, 4vw, 2.6rem);
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2rem, 5vw, 3.4rem);
}

.page-about .about-hero__lead {
  display: grid;
  gap: 1rem;
  align-content: start;
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 8vw, 3.7rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.page-about .about-hero__text {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.4rem;
}

.page-about .about-hero__figure {
  margin: 0;
  display: grid;
  gap: 0.7rem;
  min-width: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: 3px;
}

.page-about .about-hero__figure figcaption {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-origin__main h2 {
  margin: 0.5rem 0 0.9rem;
  font-size: clamp(1.5rem, 4.4vw, 2.2rem);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-origin__main p {
  margin: 0 0 0.9rem;
  max-width: 56ch;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-origin__side {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: 3px;
  box-shadow: var(--shadow-panel);
  min-width: 0;
}

.page-about .about-origin__side .note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .fact-list {
  margin: 0;
  display: grid;
  gap: 0.1rem;
}

.page-about .fact-list__row {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  gap: 0.8rem;
  padding-block: 0.62rem;
  border-top: 1px dashed var(--about-line);
}

.page-about .fact-list dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  padding-top: 0.22rem;
}

.page-about .fact-list dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.62;
  color: var(--text);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-versions {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .vtl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .vtl::before {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(79, 209, 197, 0.55), rgba(79, 209, 197, 0.06));
}

.page-about .vtl__item {
  position: relative;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  column-gap: clamp(0.8rem, 2vw, 1.4rem);
  padding: clamp(1.1rem, 3vw, 1.6rem) 0 clamp(1.1rem, 3vw, 1.6rem) clamp(1.5rem, 4vw, 2.4rem);
  border-bottom: 1px dashed var(--about-line);
}

.page-about .vtl__item::before {
  content: "";
  position: absolute;
  left: calc(0.42rem - 4px);
  top: clamp(1.6rem, 3.6vw, 2.1rem);
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(79, 209, 197, 0.14);
}

.page-about .vtl__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.18);
}

.page-about .vtl__ver {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

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

.page-about .vtl__title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.02rem, 2.5vw, 1.24rem);
  font-weight: 500;
  line-height: 1.42;
  color: var(--paper);
}

.page-about .vtl__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 球队库整合对比 ---------- */

.page-about .about-merge {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .merge {
  display: grid;
  gap: 1rem;
}

.page-about .merge__col {
  display: grid;
  align-content: start;
  gap: 0.2rem;
  padding: clamp(1.15rem, 3vw, 1.8rem);
  border: 1px solid var(--about-line);
  border-radius: 3px;
  background: var(--about-panel);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease, opacity 0.3s ease;
}

.page-about .merge__col--after {
  background: var(--about-panel-raise);
  border-color: rgba(79, 209, 197, 0.4);
}

.page-about .merge__col h3 {
  margin: 0.55rem 0 0;
  font-size: clamp(1.08rem, 2.7vw, 1.32rem);
  font-weight: 500;
  line-height: 1.36;
  color: var(--paper);
}

.page-about .merge__list {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .merge__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .merge__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--gray);
}

.page-about .merge__col--after .merge__list li::before {
  background: var(--cyan);
}

.page-about .merge__note {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--about-line);
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-about .about-merge__figure {
  margin: clamp(1.4rem, 3.5vw, 2.2rem) 0 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-merge__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: 3px;
}

.page-about .about-merge__figure figcaption {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- iOS 索引 ---------- */

.page-about .about-ios {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-ios__panel {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid rgba(79, 209, 197, 0.3);
  border-radius: 4px;
  background:
    radial-gradient(100% 130% at 100% 0%, rgba(255, 138, 61, 0.17), transparent 58%),
    linear-gradient(152deg, #0B4F6C 0%, #0F3D3E 72%);
  box-shadow: var(--shadow-panel);
}

.page-about .about-ios__head {
  display: grid;
  gap: 0.6rem;
}

.page-about .about-ios__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-ios__text {
  margin: 0;
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .steps {
  list-style: none;
  margin: clamp(1.4rem, 3.5vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .steps__item {
  padding: 0.95rem 0;
  border-top: 1px solid rgba(168, 218, 220, 0.24);
}

.page-about .steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 0.5rem;
}

.page-about .steps__title {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .steps__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .about-ios__stats {
  display: grid;
  gap: 1.2rem;
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  padding-top: clamp(1.1rem, 2.5vw, 1.5rem);
  border-top: 1px solid rgba(168, 218, 220, 0.28);
}

.page-about .meter__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.55rem;
}

.page-about .meter__name {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}

.page-about .meter__val {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--cyan);
}

.page-about .meter__track {
  height: 6px;
  border-radius: 999px;
  background: rgba(168, 218, 220, 0.16);
  overflow: hidden;
}

.page-about .meter__fill {
  display: block;
  height: 100%;
  width: calc(var(--v) * 1%);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--shallow));
}

.page-about .stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.1rem 0.45rem;
}

.page-about .stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .stat__unit {
  font-size: 0.88rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-about .stat__label {
  flex-basis: 100%;
  margin-top: 0.35rem;
  font-size: 0.83rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 数据节奏 ---------- */

.page-about .about-data {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-data__grid {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.6rem);
}

.page-about .about-data__prose p {
  margin: 0 0 1rem;
  max-width: 56ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text-soft);
}

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

.page-about .stat-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .stat-row__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem 0.45rem;
  padding: 0.95rem 0;
  border-top: 1px dashed var(--about-line);
}

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

.page-about .stat-row__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .stat-row__unit {
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .stat-row__label {
  flex-basis: 100%;
  margin-top: 0.3rem;
  font-size: 0.84rem;
  line-height: 1.62;
  color: var(--text-dim);
}

/* ---------- 辽宁服务网络 ---------- */

.page-about .about-liaoning {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-liaoning__grid {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.4rem);
}

.page-about .about-liaoning__prose p {
  margin: 0 0 1rem;
  max-width: 56ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-liaoning__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.page-about .about-liaoning__figure {
  margin: 0;
  display: grid;
  gap: 0.7rem;
  min-width: 0;
}

.page-about .about-liaoning__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: 3px;
}

.page-about .about-liaoning__figure figcaption {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .team {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .team__card {
  display: grid;
  align-content: start;
  padding: clamp(1.15rem, 3vw, 1.6rem);
  border: 1px solid var(--about-line);
  border-radius: 3px;
  background: var(--about-panel);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.page-about .team__no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--orange);
  margin-bottom: 0.7rem;
}

.page-about .team__role {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .team__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .team__tag {
  justify-self: start;
  margin-top: 1rem;
  padding: 0.24rem 0.65rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  color: var(--text-dim);
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

/* ---------- 继续阅读 ---------- */

.page-about .about-next {
  padding-block: clamp(2rem, 5vw, 3.4rem);
}

.page-about .about-next__panel {
  padding: clamp(1.4rem, 3.5vw, 2.4rem);
  border: 1px solid var(--about-line);
  border-radius: 3px;
  background: var(--about-panel);
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(1.3rem, 4vw, 1.9rem);
  font-weight: 400;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .next-list {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
}

.page-about .next-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0.15rem;
  border-bottom: 1px solid var(--about-line);
  color: var(--text);
  text-decoration: none;
  font-size: 0.93rem;
  line-height: 1.6;
  transition: color 0.22s ease, padding-left 0.22s ease;
}

.page-about .next-list a::after {
  content: "\2192";
  flex: none;
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-about .next-list a:hover,
.page-about .next-list a:focus-visible {
  color: var(--cyan);
  padding-left: 0.55rem;
}

/* ---------- 交互增强 ---------- */

@media (hover: hover) {
  .page-about .merge:hover .merge__col {
    opacity: 0.6;
  }

  .page-about .merge .merge__col:hover {
    opacity: 1;
    transform: translateY(-4px);
    border-color: rgba(79, 209, 197, 0.6);
  }

  .page-about .team__card:hover {
    transform: translateY(-4px);
    border-color: rgba(79, 209, 197, 0.5);
    background: var(--about-panel-raise);
  }

  .page-about .team__card:hover .team__tag {
    color: var(--navy);
    background: var(--cyan);
    border-color: var(--cyan);
  }
}

.page-about .is-revealed .meter__fill {
  transform-origin: left center;
  animation: about-meter-grow 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

@keyframes about-meter-grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-ios__stats {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
    gap: 1.6rem;
  }

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

@media (min-width: 820px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    column-gap: clamp(1.8rem, 4vw, 3rem);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-about .merge {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 1.2rem;
  }

  .page-about .vtl__item {
    grid-template-columns: 6rem minmax(0, 1fr);
    column-gap: 1.8rem;
    padding-left: 3rem;
  }

  .page-about .vtl__ver {
    font-size: 2.3rem;
    line-height: 1;
    letter-spacing: -0.02em;
    color: rgba(79, 209, 197, 0.85);
  }

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

  .page-about .steps__item {
    border-top: 0;
    border-left: 1px dashed rgba(168, 218, 220, 0.26);
    padding: 0 1.4rem;
  }

  .page-about .steps__item:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .steps__item:last-child {
    padding-right: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-liaoning__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .merge__col,
  .page-about .team__card,
  .page-about .next-list a,
  .page-about .team__tag,
  .page-about .meter__fill {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }

  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

.page-about {
  --v: 1rem;
}