.page-about {
  --about-axis: 6px;
  --about-rail: 34px;
  --about-gap: 56px;
  overflow-x: hidden;
}

.page-about .about-crumb-wrap {
  padding-top: 26px;
  padding-bottom: 4px;
}

.page-about .about-crumb {
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding: 18px 0 0;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: end;
}

.page-about .about-kicker {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
  display: inline-block;
}

.page-about .about-h1 {
  margin: 0;
  font-size: clamp(34px, 7.2vw, 74px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 16em;
}

.page-about .about-lead {
  margin: 24px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-hero-side {
  display: none;
}

.page-about .about-hero-figure {
  margin: 48px 0 0;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.page-about .about-hero-figure .figure-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  clip-path: var(--clip-md);
}

/* ============ 章节通用 ============ */
.page-about .about-chapter {
  padding: clamp(64px, 10vw, 96px) 0 0;
}

.page-about .about-sec-head {
  margin-bottom: 48px;
  max-width: 74ch;
}

.page-about .about-sec-head .sec-num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--moss);
}

.page-about .about-sec-head .sec-title {
  margin: 0;
  font-size: clamp(26px, 4.4vw, 44px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-sec-head .sec-sub {
  margin: 18px 0 0;
  max-width: 66ch;
  color: var(--gray);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-sub {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--gold-lt);
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.page-about .about-inline-link {
  margin-top: 20px;
  color: var(--gray);
  font-size: 15px;
  line-height: 1.8;
}

/* ============ 时间轴 ============ */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 var(--about-gap) var(--about-rail);
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 18px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line) 0%, rgba(44, 49, 58, 0.15) 100%);
}

.page-about .about-tl-item:last-child::before {
  content: none;
}

.page-about .about-tl-mark {
  position: absolute;
  left: var(--about-axis);
  top: 6px;
  width: 13px;
  height: 13px;
  margin-left: -6.5px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-tl-item:hover .about-tl-mark,
.page-about .about-tl-item:focus-within .about-tl-mark {
  background: var(--gold);
  border-color: var(--gold-lt);
}

.page-about .about-tl-panel {
  position: relative;
  padding: 22px 22px 24px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-md);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-tl-item:hover .about-tl-panel,
.page-about .about-tl-item:focus-within .about-tl-panel {
  border-color: var(--gold);
  transform: translateX(4px);
}

.page-about .about-tl-year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--clay);
}

.page-about .about-tl-title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-tl-text {
  margin: 0;
  color: var(--gray);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-tl-points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-tl-points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
}

.page-about .about-tl-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 1px;
  background: var(--gold);
}

/* ============ 做事方式 ============ */
.page-about .about-chapter-alt .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-rule {
  position: relative;
  padding: 30px 24px 32px;
  background:
    linear-gradient(180deg, rgba(212, 167, 44, 0.06) 0%, rgba(212, 167, 44, 0) 46%),
    var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-md);
  transition: border-color 0.3s var(--ease);
}

.page-about .about-rule:hover {
  border-color: var(--gold);
}

.page-about .about-rule-idx {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--moss);
  text-transform: uppercase;
}

.page-about .about-rule-title {
  margin: 0 0 14px;
  font-size: 21px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--gold-lt);
}

.page-about .about-rule-text {
  margin: 0;
  color: var(--gray);
  font-size: 15.5px;
  line-height: 1.88;
}

/* ============ 覆盖能力 ============ */
.page-about .about-reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-reach-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-content: start;
}

.page-about .about-stat {
  padding: 22px 18px 20px;
  background: var(--ink-2);
  border-top: 2px solid var(--gold);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .about-stat .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.6vw, 44px);
  font-weight: 900;
  line-height: 1;
  color: var(--paper);
  letter-spacing: -0.02em;
}

.page-about .about-stat .stat-label {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-reach-body .about-sub {
  margin-top: 28px;
}

.page-about .about-reach-body .about-sub:first-child {
  margin-top: 0;
}

.page-about .about-reach-body p {
  margin: 0 0 1.2em;
  color: var(--gray);
  line-height: 1.88;
}

/* ============ 团队 ============ */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-team-figure {
  margin: 0;
}

.page-about .about-team-figure .figure-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  clip-path: var(--clip-md);
}

.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .about-team-item {
  padding-left: 18px;
  border-left: 1px solid var(--line);
  transition: border-color 0.3s var(--ease);
}

.page-about .about-team-item:hover {
  border-left-color: var(--gold);
}

.page-about .about-team-idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--clay);
}

.page-about .about-team-title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-team-item p:last-child {
  margin: 0;
  color: var(--gray);
  font-size: 15.5px;
  line-height: 1.85;
}

/* ============ 生态荣誉 ============ */
.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-eco-rings {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  justify-content: center;
}

.page-about .about-ring {
  position: relative;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--moss) 0deg 216deg, var(--line) 216deg 360deg);
  transition: transform 0.4s var(--ease);
}

.page-about .about-ring-b {
  background: conic-gradient(var(--clay) 0deg 180deg, var(--line) 180deg 360deg);
}

.page-about .about-ring:hover {
  transform: translateY(-4px);
}

.page-about .about-ring-inner {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: var(--ink);
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  padding: 8px;
  text-align: center;
}

.page-about .about-ring-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-ring-cap {
  font-size: 12px;
  line-height: 1.5;
  color: var(--gray);
}

.page-about .about-eco-body p {
  margin: 0 0 1.2em;
  color: var(--gray);
  line-height: 1.88;
}

.page-about .about-eco-body .about-sub {
  margin-top: 28px;
}

.page-about .about-eco-body .about-sub:first-child {
  margin-top: 0;
}

/* ============ 下一个版本 ============ */
.page-about .about-chapter-last {
  border-top: 1px solid var(--line);
  margin-top: clamp(64px, 10vw, 96px);
}

.page-about .about-next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  counter-reset: about-next;
}

.page-about .about-next-item {
  position: relative;
  padding: 24px 22px;
  background: var(--ink-2);
  border-left: 3px solid var(--moss);
  clip-path: var(--clip-sm);
  transition: border-left-color 0.3s var(--ease);
}

.page-about .about-next-item:hover {
  border-left-color: var(--gold);
}

.page-about .about-next-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--moss);
  margin-bottom: 10px;
}

.page-about .about-next-title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-next-item p:last-child {
  margin: 0;
  color: var(--gray);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-next-figure {
  margin: 0;
  align-self: start;
}

.page-about .about-next-figure .figure-img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  clip-path: var(--clip-lg);
}

/* ============ 收尾 CTA ============ */
.page-about .about-cta {
  padding: clamp(64px, 10vw, 96px) 0 clamp(72px, 12vw, 120px);
}

.page-about .about-cta-panel {
  padding: clamp(32px, 5vw, 56px);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(212, 167, 44, 0.12) 0%, rgba(8, 9, 12, 0) 60%),
    var(--ink-2);
  border-color: var(--line);
}

.page-about .about-cta-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.page-about .about-cta-title {
  margin: 0 0 18px;
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--paper);
  max-width: 22em;
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 62ch;
  color: var(--gray);
  font-size: 16px;
  line-height: 1.88;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about {
    --about-rail: 46px;
    --about-gap: 64px;
  }

  .page-about .about-tl-panel {
    padding: 26px 30px 28px;
  }

  .page-about .about-chapter-alt .about-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-reach-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-team-list {
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero-side {
    display: block;
    justify-self: end;
    align-self: start;
    padding-top: 16px;
  }

  .page-about .about-chapter {
    padding-top: 96px;
  }

  .page-about .about-reach-grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
  }

  .page-about .about-reach-stats {
    position: sticky;
    top: 120px;
    align-self: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: 5fr 7fr;
    gap: 52px;
    align-items: start;
  }

  .page-about .about-team-figure {
    position: sticky;
    top: 120px;
  }

  .page-about .about-eco-grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-eco-rings {
    padding-top: 12px;
    gap: 30px;
  }

  .page-about .about-ring {
    width: 172px;
    height: 172px;
  }

  .page-about .about-ring-inner {
    width: 134px;
    height: 134px;
  }

  .page-about .about-next-grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-next-figure {
    position: sticky;
    top: 120px;
    max-width: 380px;
    justify-self: end;
  }
}

@media (min-width: 1200px) {
  .page-about .about-h1 {
    max-width: 15em;
  }

  .page-about .about-tl-panel {
    padding: 30px 36px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-panel,
  .page-about .about-ring,
  .page-about .about-tl-mark {
    transition: none;
  }

  .page-about .about-tl-item:hover .about-tl-panel {
    transform: none;
  }
}