.page-about {
  --ab-gap: clamp(1.25rem, 3.5vw, 2.5rem);
  --ab-sec: clamp(2.75rem, 8vw, 5.5rem);
  background: var(--lz-ink);
  color: var(--lz-text);
  overflow-x: clip;
}

/* ---------- 顶部上下文条 ---------- */
.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  padding-block: 1.35rem 0;
}

.page-about .about-topbar__note {
  margin: 0;
  font-family: var(--lz-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--lz-mute);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.75rem, 5vw, 3rem) var(--ab-sec);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -20%;
  width: min(82vw, 44rem);
  aspect-ratio: 16 / 10;
  background: linear-gradient(118deg, rgba(43, 232, 176, 0.16), rgba(27, 142, 122, 0.05) 55%, transparent 80%);
  border-top: 1px solid var(--lz-line-strong);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: var(--ab-gap);
  align-items: end;
}

.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 1.1rem;
  padding: 0.4rem 1.6rem 0.4rem 0.7rem;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--lz-pulse-soft);
  background: linear-gradient(90deg, rgba(43, 232, 176, 0.18), rgba(43, 232, 176, 0) 94%);
  border-left: 2px solid var(--lz-pulse);
}

.page-about .about-hero h1 {
  margin: 0 0 1.15rem;
  font-family: var(--lz-font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  font-size: clamp(2rem, 7.4vw, 4rem);
}

.page-about .about-hero h1 br {
  display: none;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__figure,
.page-about .about-versions__figure,
.page-about .about-scale__figure {
  margin: 0;
}

/* ---------- 起点 ---------- */
.page-about .about-why {
  position: relative;
  padding-block: var(--ab-sec);
  border-top: 1px solid var(--lz-line-soft);
}

.page-about .about-why__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.page-about .about-why__head h2,
.page-about .about-sec-head h2,
.page-about .about-scale__main h2,
.page-about .about-cta h2 {
  margin: 0.85rem 0 0;
  font-family: var(--lz-font-display);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 1.14;
  font-size: clamp(1.5rem, 4.4vw, 2.45rem);
}

.page-about .about-why__body {
  position: relative;
  padding-left: 1.1rem;
  border-left: 2px solid var(--lz-line-strong);
}

.page-about .about-why__body p {
  margin: 0 0 1rem;
  color: var(--lz-mute);
  line-height: 1.78;
}

.page-about .about-why__body p:last-child {
  margin-bottom: 0;
  color: var(--lz-text);
}

/* ---------- 通用段落头 ---------- */
.page-about .about-sec-head {
  max-width: 44rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-versions {
  padding-block: var(--ab-sec);
  background: linear-gradient(180deg, rgba(12, 35, 56, 0.55), rgba(6, 23, 38, 0) 70%);
}

.page-about .about-versions__figure {
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 0.75rem;
  bottom: 1.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--lz-pulse), var(--lz-pulse-soft) 42%, var(--lz-amber) 88%, transparent);
  transform: rotate(0.9deg);
  transform-origin: top center;
  opacity: 0.72;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 3.1rem;
  margin-bottom: clamp(1rem, 3vw, 1.6rem);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0.62rem;
  top: 1.9rem;
  width: 0.86rem;
  height: 0.86rem;
  border-radius: 50%;
  background: var(--lz-ink);
  border: 2px solid var(--lz-pulse);
  box-shadow: 0 0 0 5px rgba(43, 232, 176, 0.1);
  z-index: 1;
}

.page-about .about-timeline__card {
  padding: clamp(1rem, 3vw, 1.5rem);
}

.page-about .about-timeline__code {
  display: inline-block;
  margin-bottom: 0.7rem;
  padding: 0.18rem 0.85rem 0.18rem 0.5rem;
  font-family: var(--lz-font-mono);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--lz-ink);
  background: var(--lz-pulse);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, calc(100% - 0.5rem) 100%, 0 100%);
  transition: background-color 0.25s var(--lz-ease);
}

.page-about .about-timeline__code:hover,
.page-about .about-timeline__code:focus-visible {
  background: var(--lz-pulse-soft);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--lz-font-display);
  font-weight: 900;
  letter-spacing: -0.01em;
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.74;
  color: var(--lz-mute);
}

.page-about .about-timeline__card .about-timeline__delta {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px dashed var(--lz-line);
  font-size: 0.87rem;
  color: var(--lz-pulse-soft);
}

/* ---------- 三班值守 ---------- */
.page-about .about-team {
  padding-block: var(--ab-sec);
}

.page-about .about-shift {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-shift__ring {
  position: relative;
  justify-self: center;
  width: min(66vw, 16rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(143, 166, 184, 0.14) 0deg 120deg,
    var(--lz-pulse) 120deg 195deg,
    var(--lz-amber) 195deg 285deg,
    var(--lz-glow) 285deg 360deg
  );
  box-shadow: 0 0 48px -16px rgba(43, 232, 176, 0.55);
}

.page-about .about-shift__hub {
  position: absolute;
  inset: 19%;
  display: grid;
  place-content: center;
  gap: 0.2rem;
  text-align: center;
  border-radius: 50%;
  background: var(--lz-ink);
  border: 1px solid var(--lz-line);
}

.page-about .about-shift__num {
  display: block;
  font-size: clamp(1.6rem, 6.5vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lz-text);
}

.page-about .about-shift__cap {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--lz-mute);
}

.page-about .about-shift__list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.page-about .about-shift__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.4rem 0.85rem;
  padding: 0.9rem 1rem 0.9rem 1.05rem;
  background: var(--lz-ink-2);
  border: 1px solid var(--lz-line-soft);
  border-left: 3px solid var(--lz-pulse);
  transition: background-color 0.25s var(--lz-ease), transform 0.25s var(--lz-ease);
}

.page-about .about-shift__item:nth-child(2) {
  border-left-color: var(--lz-amber);
}

.page-about .about-shift__item:nth-child(3) {
  border-left-color: var(--lz-glow);
}

.page-about .about-shift__item p {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--lz-mute);
}

.page-about .about-shift__time {
  justify-self: end;
  font-size: 0.82rem;
  color: var(--lz-pulse-soft);
}

@media (hover: hover) {
  .page-about .about-shift__item:hover {
    transform: translateX(3px);
    background: var(--lz-ink-3);
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scale {
  padding-block: var(--ab-sec);
  border-top: 1px solid var(--lz-line-soft);
}

.page-about .about-scale__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-scale__main .lz-prose {
  margin-top: 1rem;
  color: var(--lz-mute);
  line-height: 1.78;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--lz-line);
}

.page-about .about-stats__item {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) 1fr;
  align-items: baseline;
  gap: 1rem;
  padding: 0.95rem 0.15rem;
  border-bottom: 1px solid var(--lz-line-soft);
}

.page-about .about-stats__num {
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lz-amber);
}

.page-about .about-stats__label {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--lz-mute);
}

/* ---------- 互校 ---------- */
.page-about .about-audit {
  padding-block: var(--ab-sec);
}

.page-about .about-audit__grid {
  display: grid;
  gap: 1px;
  background: var(--lz-line-soft);
  border: 1px solid var(--lz-line-soft);
}

.page-about .about-audit__cell {
  padding: clamp(1.15rem, 3vw, 1.8rem);
  background: var(--lz-ink-2);
}

.page-about .about-audit__n {
  display: block;
  margin-bottom: 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--lz-coral);
}

.page-about .about-audit__cell h3 {
  margin: 0 0 0.55rem;
  font-family: var(--lz-font-display);
  font-weight: 900;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
}

.page-about .about-audit__cell p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--lz-mute);
}

.page-about .about-audit__note {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--lz-amber);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--lz-text);
}

.page-about .about-audit__note .lz-num {
  color: var(--lz-amber);
  font-weight: 700;
}

/* ---------- 赛季专题 ---------- */
.page-about .about-seasons {
  padding-block: var(--ab-sec);
  background: linear-gradient(180deg, rgba(18, 60, 70, 0.4), rgba(6, 23, 38, 0) 78%);
}

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

.page-about .about-seasons__item {
  padding: 1.15rem 1.25rem 1.35rem;
  border: 1px solid var(--lz-line-soft);
  border-top: 2px solid var(--lz-pulse);
  background: linear-gradient(180deg, rgba(18, 60, 70, 0.5), rgba(12, 35, 56, 0.12));
}

.page-about .about-seasons__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--lz-font-display);
  font-weight: 900;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
}

.page-about .about-seasons__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--lz-mute);
}

/* ---------- 联络引导 ---------- */
.page-about .about-cta {
  padding-block: var(--ab-sec) clamp(3rem, 9vw, 6rem);
}

.page-about .about-cta__inner {
  position: relative;
  padding: clamp(1.75rem, 5vw, 3rem);
  background: linear-gradient(142deg, var(--lz-ink-2), var(--lz-ink-3));
  border: 1px solid var(--lz-line);
  clip-path: polygon(0 0, calc(100% - 2.25rem) 0, 100% 2.25rem, 100% 100%, 0 100%);
}

.page-about .about-cta h2 {
  margin-top: 0;
}

.page-about .about-cta__lede {
  margin: 0.85rem 0 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--lz-mute);
}

.page-about .about-cta__links {
  list-style: none;
  display: grid;
  gap: 0;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-about .about-cta__links li {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--lz-line-soft);
}

.page-about .about-cta__links a {
  font-family: var(--lz-font-display);
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: -0.005em;
  color: var(--lz-pulse);
  text-decoration: none;
  justify-self: start;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--lz-ease), color 0.25s var(--lz-ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--lz-pulse-soft);
  border-bottom-color: var(--lz-pulse-soft);
}

.page-about .about-cta__links span {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--lz-mute);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero h1 br {
    display: inline;
  }
}

@media (min-width: 780px) {
  .page-about .about-audit__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 1.75rem;
  }
}

@media (min-width: 820px) {
  .page-about .about-shift {
    grid-template-columns: minmax(0, 18rem) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: clamp(2rem, 6vw, 4.5rem);
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%) rotate(0.5deg);
  }

  .page-about .about-timeline__item {
    width: calc(50% - 2.75rem);
    padding-left: 0;
    margin-bottom: clamp(1.25rem, 2.6vw, 2rem);
  }

  .page-about .about-timeline__item::before {
    display: none;
  }

  .page-about .about-timeline__item::after {
    content: "";
    position: absolute;
    top: 2.2rem;
    width: 2.75rem;
    height: 2px;
    background: linear-gradient(90deg, var(--lz-pulse), transparent);
  }

  .page-about .about-timeline__item:nth-child(odd) {
    margin-right: auto;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: auto;
  }

  .page-about .about-timeline__item:nth-child(odd)::after {
    right: -2.75rem;
  }

  .page-about .about-timeline__item:nth-child(even)::after {
    left: -2.75rem;
    background: linear-gradient(270deg, var(--lz-pulse), transparent);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-shift__item,
  .page-about .about-timeline__code,
  .page-about .about-cta__links a {
    transition-duration: 0.01ms;
  }

  .page-about .about-shift__item:hover {
    transform: none;
  }
}