.page-about {
  background: var(--night);
  color: var(--cream);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 38px) 0 clamp(34px, 6vw, 74px);
  background:
    radial-gradient(90% 80% at 88% -10%, rgba(200, 255, 61, 0.18), transparent 62%),
    radial-gradient(70% 60% at 2% 4%, rgba(143, 91, 255, 0.2), transparent 66%),
    linear-gradient(180deg, var(--grass) 0%, var(--night) 74%);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 61, 0.05) 70%);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .breadcrumb a:hover {
  color: var(--lime);
  border-color: var(--lime);
}
.page-about .breadcrumb__sep {
  color: var(--edge);
}
.page-about .breadcrumb [aria-current] {
  color: var(--cream);
}

.page-about .about-hero .eyebrow {
  margin: clamp(20px, 4vw, 38px) 0 14px;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8.4vw, 5rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--cream);
  max-width: 16ch;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 3vw, 26px) 0 0;
  max-width: 44ch;
  font-size: clamp(0.95rem, 2.6vw, 1.05rem);
  line-height: 1.8;
  color: rgba(244, 247, 236, 0.82);
}

.page-about .about-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 3vw, 36px);
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-hero__marks li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
}
.page-about .about-hero__marks li:nth-child(2) {
  border-color: var(--orange);
}
.page-about .about-hero__marks li:nth-child(3) {
  border-color: var(--violet);
}
.page-about .about-hero__marks .num {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.6vw, 1.6rem);
  letter-spacing: 0.03em;
  color: var(--cream);
  line-height: 1;
}
.page-about .about-hero__marks li > span:last-child {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 版式骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  padding: clamp(26px, 5vw, 64px) 0 clamp(44px, 8vw, 84px);
}

.page-about .about-index {
  min-width: 0;
}
.page-about .about-index__title {
  display: none;
}
.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  color: var(--mist);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.page-about .about-index__link .num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--lime);
}
.page-about .about-index__link:hover {
  color: var(--cream);
  border-color: var(--lime);
  background: rgba(200, 255, 61, 0.08);
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  margin: 0 0 clamp(44px, 8vw, 96px);
  scroll-margin-top: calc(var(--header-h, 68px) + 24px);
}
.page-about .about-section:last-child {
  margin-bottom: 0;
}
.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-about .about-kicker .num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--lime);
}
.page-about .about-section h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cream);
  max-width: 24ch;
}
.page-about .about-section p {
  margin: 0 0 14px;
  max-width: 46ch;
  font-size: 0.96rem;
  line-height: 1.82;
  color: rgba(244, 247, 236, 0.82);
}
.page-about .about-lead {
  color: var(--mint) !important;
  font-size: 0.95rem !important;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding-bottom: 2px;
  font-size: 0.9rem;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), gap 0.18s var(--ease);
}
.page-about .about-link::after {
  content: "→";
  font-size: 0.85em;
}
.page-about .about-link:hover {
  color: var(--mint);
  border-color: var(--mint);
  gap: 12px;
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
}
.page-about .slant {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  box-shadow: 0 26px 64px rgba(0, 0, 0, 0.5);
}
.page-about .slant img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .stage-list {
  position: relative;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .stage-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), rgba(200, 255, 61, 0.18) 58%, var(--edge));
}
.page-about .stage {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0 0 clamp(24px, 4vw, 34px) 34px;
}
.page-about .stage:last-child {
  padding-bottom: 0;
}
.page-about .stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--edge);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .stage:hover::before,
.page-about .stage:focus-within::before {
  border-color: var(--lime);
  background: var(--lime);
  box-shadow: 0 0 0 7px rgba(200, 255, 61, 0.12);
}
.page-about .stage__year {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5.8vw, 2.2rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(157, 179, 167, 0.55);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-about .stage:hover .stage__year {
  color: var(--lime);
  transform: translateX(2px);
}
.page-about .stage__body h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--cream);
}
.page-about .stage__body p {
  margin: 0 0 10px;
  max-width: 48ch;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(244, 247, 236, 0.78);
}
.page-about .stage__note {
  margin: 0 !important;
  padding-left: 10px;
  border-left: 2px solid var(--edge);
  font-size: 0.8rem !important;
  color: var(--mist) !important;
  transition: border-color 0.2s var(--ease);
}
.page-about .stage:hover .stage__note {
  border-color: var(--mint);
}

/* ---------- 编辑台 ---------- */
.page-about .method-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .method-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  background: var(--grass);
}
.page-about .method-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .method-figure figcaption,
.page-about .about-wide-figure figcaption {
  padding: 10px 16px 12px;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(10, 59, 46, 0.85);
}

.page-about .method-steps {
  display: grid;
  gap: 10px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
}
.page-about .method-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-m);
  background: rgba(10, 59, 46, 0.6);
  border: 1px solid transparent;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.page-about .method-steps li:hover {
  border-color: var(--edge);
  background: rgba(10, 59, 46, 0.9);
}
.page-about .method-steps .num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mint);
  padding-top: 2px;
}
.page-about .method-steps__text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(244, 247, 236, 0.78);
}
.page-about .method-steps__text strong {
  display: block;
  margin-bottom: 2px;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--cream);
}

/* ---------- 合作网络 ---------- */
.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(20px, 4vw, 32px) 0;
}
.page-about .stat {
  padding: clamp(14px, 3vw, 20px);
  border: 1px solid var(--edge);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(10, 59, 46, 0.85), rgba(4, 30, 24, 0.92));
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .stat:hover {
  transform: translateY(-4px);
  border-color: var(--lime);
}
.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5.4vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--lime);
}
.page-about .stat:nth-child(2) .stat__num {
  color: var(--orange);
}
.page-about .stat:nth-child(3) .stat__num {
  color: var(--mint);
}
.page-about .stat:nth-child(4) .stat__num {
  color: var(--violet);
}
.page-about .stat__label {
  display: block;
  margin-top: 9px;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--cream);
}
.page-about .stat__note {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-wide-figure {
  margin: 0 0 clamp(20px, 4vw, 28px);
  overflow: hidden;
  border-radius: var(--radius-l);
}
.page-about .about-wide-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 服务团队 ---------- */
.page-about .about-team {
  padding: clamp(20px, 4vw, 40px);
  border: 1px solid var(--edge);
  border-radius: var(--radius-l);
  background:
    radial-gradient(80% 90% at 96% 0%, rgba(143, 91, 255, 0.18), transparent 62%),
    linear-gradient(150deg, rgba(10, 59, 46, 0.92), rgba(4, 30, 24, 0.96));
}
.page-about .team-figures {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 4vw, 36px);
  margin: 6px 0 22px;
}
.page-about .team-figure {
  min-width: 120px;
}
.page-about .team-figure .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 7vw, 2.6rem);
  line-height: 1;
  color: var(--lime);
}
.page-about .team-figure:nth-child(2) .num {
  color: var(--violet);
}
.page-about .team-figure span:last-child {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-contact {
  display: grid;
  gap: 9px;
  margin: 0 0 22px;
  padding: 16px 18px;
  list-style: none;
  border-left: 2px solid var(--lime);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: rgba(4, 30, 24, 0.55);
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(244, 247, 236, 0.82);
}
.page-about .about-contact a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(110, 242, 200, 0.4);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-contact a:hover {
  color: var(--lime);
  border-color: var(--lime);
}
.page-about .about-contact .num {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--cream);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .stat:first-child {
    grid-column: span 2;
  }
  .page-about .stat:nth-child(4) {
    grid-column: span 2;
  }
}

@media (min-width: 820px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(28px, 4vw, 54px);
  }
  .page-about .origin-grid .slant {
    margin-top: -18px;
  }

  .page-about .method-grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }
  .page-about .method-figure {
    order: -1;
  }

  .page-about .stage {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 22px;
    padding-left: 38px;
  }
  .page-about .stage__year {
    text-align: right;
  }
}

@media (min-width: 920px) {
  .page-about .about-layout {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h, 68px) + 18px);
    align-self: start;
  }
  .page-about .about-index__title {
    display: block;
    margin: 0 0 14px;
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--mist);
  }
  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-index__link {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stat,
  .page-about .stat:hover,
  .page-about .stage__year,
  .page-about .stage:hover .stage__year,
  .page-about .about-link,
  .page-about .about-link:hover {
    transform: none;
    transition: none;
  }
}