.page-about {
  --about-rail: 286px;
  --about-offset: 26px;
  --about-glow: rgba(198, 255, 61, 0.11);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 22px 0 46px;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -140px;
  right: -12%;
  width: min(700px, 68%);
  height: 600px;
  background:
    linear-gradient(155deg, var(--about-glow) 0%, rgba(198, 255, 61, 0) 62%),
    linear-gradient(205deg, rgba(255, 158, 44, 0.09) 0%, rgba(255, 158, 44, 0) 58%);
  clip-path: polygon(32% 0, 100% 0, 100% 76%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(36px, 8.4vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--white);
  max-width: 14ch;
}

.page-about .about-hero__lede {
  max-width: 46ch;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 30px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

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

.page-about .about-hero__stat-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0;
}

.page-about .about-hero__stat-value {
  margin: 6px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--lime);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: end;
    gap: 56px;
  }
  .page-about .about-hero {
    padding: 30px 0 64px;
  }
}

/* ---------- 分屏外壳 ---------- */
.page-about .about-shell {
  display: grid;
  gap: 34px;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: 20px;
}

.page-about .about-rail__sticky {
  display: grid;
  gap: 14px;
}

.page-about .about-rail__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body);
}

.page-about .about-index {
  display: grid;
  gap: 2px;
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--body);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--white);
  background: var(--ink-2);
}

.page-about .about-index__link[data-active="true"] {
  color: var(--lime);
  border-left-color: var(--lime);
  background: var(--ink-2);
}

.page-about .about-index__link[data-active="true"] .about-index__num {
  color: var(--lime);
}

.page-about .about-rail__cta {
  justify-self: start;
  margin-top: 6px;
}

/* ---------- 章节 ---------- */
.page-about .about-chapters {
  display: grid;
  gap: 54px;
  min-width: 0;
}

.page-about .about-chapter {
  padding-top: 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
  min-width: 0;
}

.page-about .about-chapter__head {
  margin-bottom: 18px;
}

.page-about .about-chapter__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 4.6vw, 48px);
  line-height: 1.06;
  font-weight: 300;
  letter-spacing: -0.012em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-chapter__lede {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
}

.page-about .about-chapter__tail {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--body);
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.page-about .about-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .about-chapter__tail .num,
.page-about .about-team__tail .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--white);
}

/* ---------- 三块内容 ---------- */
.page-about .about-points {
  display: grid;
  gap: 16px;
}

.page-about .about-point {
  padding: 22px 20px 24px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-point:hover {
  transform: translateY(-2px);
  border-color: rgba(198, 255, 61, 0.45);
}

.page-about .about-point__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-point__title {
  margin: 12px 0 10px;
  font-size: 17px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-point__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--body);
}

@media (min-width: 820px) {
  .page-about .about-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }
  .page-about .about-point:nth-child(2) {
    margin-top: var(--about-offset);
  }
  .page-about .about-point:nth-child(3) {
    margin-top: 10px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 28px;
}

.page-about .about-team__intro {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
  max-width: 56ch;
}

.page-about .about-roster {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roster__item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(30, 68, 56, 0.55), rgba(11, 31, 26, 0.2));
}

.page-about .about-roster__value {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-roster__label {
  margin: 8px 0 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--white);
}

.page-about .about-roster__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--body);
}

.page-about .about-team__tail {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--body);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

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

.page-about .about-figure__cap {
  padding: 12px 16px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .about-figure--cats {
  margin: 0 0 26px;
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
  .page-about .about-figure--team {
    margin-top: 6px;
  }
}

/* ---------- 六大栏目 ---------- */
.page-about .about-cats {
  display: grid;
  gap: 14px;
}

.page-about .about-cat {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-about .about-cat:hover {
  transform: translateY(-2px);
  border-color: rgba(198, 255, 61, 0.5);
  background: #14352c;
}

.page-about .about-cat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-cat__name {
  margin: 10px 0 8px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-cat__desc {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--body);
}

.page-about .about-cat__chip {
  font-size: 10.5px;
  letter-spacing: 0.08em;
}

@media (min-width: 680px) {
  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-cat:nth-child(2) {
    margin-top: 22px;
  }
  .page-about .about-cat:nth-child(5) {
    margin-top: 14px;
  }
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: about-flow;
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-flow__step:hover {
  transform: translateY(-2px);
  border-color: rgba(198, 255, 61, 0.45);
}

.page-about .about-flow__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--r-pill);
  background: rgba(198, 255, 61, 0.12);
  color: var(--lime);
  border: 1px solid rgba(198, 255, 61, 0.3);
}

.page-about .about-flow__num {
  margin: 14px 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--body);
}

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow__step:nth-child(3n + 2) {
    margin-top: 20px;
  }
}

/* ---------- 阅读版本 ---------- */
.page-about .about-version__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-version__tab {
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--body);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-version__tab:hover {
  color: var(--white);
  border-color: rgba(198, 255, 61, 0.4);
}

.page-about .about-version__tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-version__panel {
  padding: 24px 22px 26px;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(30, 68, 56, 0.6), rgba(11, 31, 26, 0.25));
}

.page-about .about-version__panel[hidden] {
  display: none;
}

.page-about .about-version__name {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-version__desc {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body);
}

.page-about .about-version__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

/* ---------- 读者与合作 ---------- */
.page-about .about-readers {
  display: grid;
  gap: 28px;
}

.page-about .about-readers__body p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--body);
  max-width: 56ch;
}

.page-about .about-readers__list {
  display: grid;
  gap: 12px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-readers__list li {
  padding: 16px 18px;
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--ink-2);
  font-size: 14px;
  line-height: 1.72;
  color: var(--body);
}

.page-about .about-readers__key {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .about-readers {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

/* ---------- 收束 ---------- */
.page-about .about-closing {
  margin-top: 6px;
  padding: 32px 24px 36px;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(198, 255, 61, 0.14) 0%, rgba(198, 255, 61, 0) 58%),
    var(--ink-2);
}

.page-about .about-closing__title {
  margin: 12px 0 12px;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.08;
  font-weight: 300;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-about .about-closing__desc {
  margin: 0 0 24px;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--body);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }
  .page-about .about-rail__sticky {
    position: sticky;
    top: calc(var(--header-h-shrink) + 28px);
  }
  .page-about .about-chapters {
    gap: 68px;
  }
  .page-about .about-chapter {
    scroll-margin-top: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-point,
  .page-about .about-cat,
  .page-about .about-flow__step,
  .page-about .about-index__link {
    transition: none;
  }
  .page-about .about-point:hover,
  .page-about .about-cat:hover,
  .page-about .about-flow__step:hover {
    transform: none;
  }
}