.page-about {
  --about-rail: 14rem;
  --about-block: clamp(2.75rem, 6vw, 5.5rem);
  --about-split-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--ink-900);
  color: var(--ice);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
}
.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cyan);
}
.page-about .breadcrumbs .crumb-sep {
  color: var(--line);
}
.page-about .breadcrumbs [aria-current="page"] {
  color: var(--amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(circle at 82% 8%, rgba(56, 214, 196, 0.16), transparent 46%),
    radial-gradient(circle at 8% 92%, rgba(242, 169, 59, 0.1), transparent 40%),
    linear-gradient(180deg, var(--ink-850), var(--ink-900));
}

.page-about .about-hero__layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__text .kicker {
  margin-bottom: 0.85rem;
}

.page-about .about-title {
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--ice);
  max-width: 16ch;
}

.page-about .about-hero__text .lead {
  margin-top: 1.1rem;
  max-width: 54ch;
  color: var(--mist);
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-shot {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--ink-800), var(--ink-850) 55%, var(--ink-900));
  overflow: hidden;
}
.page-about .about-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(47, 70, 91, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(47, 70, 91, 0.42) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.55;
}
.page-about .about-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-shot .media__label {
  position: absolute;
  left: 0.85rem;
  bottom: 0.75rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ice);
  background: rgba(8, 24, 38, 0.78);
  border-left: 2px solid var(--cyan);
  padding: 0.28rem 0.55rem;
}

.page-about .about-hero__figure {
  border-color: var(--line);
}

/* ---------- 首屏数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
  padding: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-stats > div {
  background: var(--ink-850);
  padding: 1rem 1.1rem 1.15rem;
}
.page-about .about-stats dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  color: var(--sage);
}
.page-about .about-stats dd {
  margin: 0.4rem 0 0;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--amber);
  line-height: 1.1;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding-block: var(--about-block);
}
.page-about .about-body__layout {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--sage);
}
.page-about .about-index ol {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.7rem;
  list-style: none;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: thin;
}
.page-about .about-index a {
  display: block;
  white-space: nowrap;
  padding: 0.42rem 0.65rem;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}
.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--ink-900);
  background: var(--amber);
  border-color: var(--amber);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2rem, 4.5vw, 3.5rem);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-chapters > .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 0.9rem;
  align-items: baseline;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.page-about .chapter-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}
.page-about .about-chapter__head h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ice);
}
.page-about .about-chapter__head .idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--sage);
}

/* ---------- 正文与分栏 ---------- */
.page-about .about-prose p {
  margin: 0 0 1rem;
  max-width: 60ch;
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.85;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 214, 196, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.page-about .about-note {
  margin: 1.5rem 0 0;
  padding-left: 0.95rem;
  border-left: 2px solid var(--line);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

.page-about .about-split {
  display: grid;
  gap: var(--about-split-gap);
}

/* ---------- 服务清单 ---------- */
.page-about .about-service-list {
  margin: 0;
  padding: 0;
}
.page-about .about-service-list > div {
  padding: 0.85rem 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-service-list > div:last-child {
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-service-list dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-about .about-service-list dd {
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--ice);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.4rem;
  list-style: none;
  border-left: 1px solid var(--line);
}
.page-about .about-timeline li {
  position: relative;
  padding-bottom: 1.4rem;
}
.page-about .about-timeline li:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: calc(-1.4rem - 4.5px);
  top: 0.5rem;
  width: 8px;
  height: 8px;
  background: var(--ink-900);
  border: 1px solid var(--amber);
  transition: background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.page-about .about-timeline li:hover::before,
.page-about .about-timeline li:focus-within::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 169, 59, 0.16);
}
.page-about .tl-ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-about .about-timeline h3 {
  margin: 0.28rem 0 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ice);
  transition: color 0.25s var(--ease);
}
.page-about .about-timeline li:hover h3 {
  color: var(--amber);
}
.page-about .about-timeline p:last-child {
  margin: 0;
  max-width: 54ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-timeline-shot {
  align-self: start;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-team > li {
  background: var(--ink-850);
  padding: 1.15rem 1.1rem 1.35rem;
}
.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.4vw, 2.15rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--amber);
}
.page-about .about-team__num span {
  margin-left: 0.3rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--mist);
}
.page-about .about-team h3 {
  margin: 0.6rem 0 0.4rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ice);
}
.page-about .about-team__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 认证 ---------- */
.page-about .about-cert {
  align-self: start;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 30%, rgba(56, 214, 196, 0.12), transparent 62%),
    var(--ink-850);
  text-align: center;
}
.page-about .about-cert__badge {
  display: block;
  width: clamp(7rem, 22vw, 9.5rem);
  height: auto;
  margin: 0 auto 1rem;
  filter: drop-shadow(0 0 10px rgba(56, 214, 196, 0.2));
}
.page-about .cert-ring {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.2;
}
.page-about .cert-ring-2 {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 2 6;
}
.page-about .cert-check {
  fill: none;
  stroke: var(--amber);
  stroke-width: 2.6;
  stroke-linecap: square;
}
.page-about .about-cert__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--ice);
}
.page-about .about-cert__sub {
  margin: 0.4rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--sage);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 1px;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-eco > li {
  position: relative;
  background: var(--ink-900);
  padding: 1.1rem 1.1rem 1.25rem;
}
.page-about .about-eco__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink-900);
  background: var(--sage);
  padding: 0.1rem 0.4rem;
}
.page-about .about-eco h3 {
  margin: 0.6rem 0 0.35rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ice);
}
.page-about .about-eco p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 规模与获得（暖纸阅读块） ---------- */
.page-about .about-paper {
  padding: clamp(1.4rem, 4vw, 2.75rem);
}
.page-about .about-paper__lead {
  margin: 0 0 1.5rem;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.8;
  font-weight: 600;
  max-width: 46ch;
}
.page-about .about-reach {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(8, 24, 38, 0.16);
  border: 1px solid rgba(8, 24, 38, 0.16);
  margin: 0 0 1.5rem;
}
.page-about .about-reach__item {
  background: var(--paper);
  padding: 0.9rem 0.9rem 1rem;
}
.page-about .about-reach__num {
  margin: 0;
  font-size: clamp(1.4rem, 3.2vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--ink-900);
}
.page-about .about-reach__label {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink-800);
}
.page-about .about-paper__body {
  margin: 0 0 1.5rem;
  font-size: 0.94rem;
  line-height: 1.85;
  max-width: 58ch;
  color: var(--ink-800);
}
.page-about .about-paper__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 720px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
  .page-about .about-split--flip > :first-child {
    order: 2;
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-eco {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-reach {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .about-body__layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }
  .page-about .about-index ol {
    flex-direction: column;
    gap: 0.1rem;
    padding: 0 0 0 0.7rem;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }
  .page-about .about-index a {
    padding: 0.5rem 0.5rem 0.5rem 0.7rem;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }
  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    background: transparent;
    color: var(--amber);
    border-left-color: var(--amber);
  }
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
  .page-about .about-hero__figure {
    margin-bottom: 1.25rem;
  }
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
  transition-delay: calc(var(--d, 0) * 80ms);
}
.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@keyframes about-badge-glow {
  0%, 100% {
    filter: drop-shadow(0 0 8px rgba(56, 214, 196, 0.16));
  }
  50% {
    filter: drop-shadow(0 0 18px rgba(56, 214, 196, 0.34));
  }
}
.page-about .about-cert__badge {
  animation: about-badge-glow 5.5s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .about-cert__badge {
    animation: none;
    filter: drop-shadow(0 0 10px rgba(56, 214, 196, 0.2));
  }
  .page-about .about-timeline li::before,
  .page-about .about-timeline h3 {
    transition: none;
  }
}

/* ---------- 无 JS 兜底 ---------- */
.page-about [data-reveal] {
  opacity: 1 \9;
}
</｜｜DSML｜｜ parameter>
</invoke>

.page-about {
  --d: 0.3s;
}