.page-about {
  --about-panel: rgba(18, 38, 58, 0.72);
  --about-radius: 18px;
  display: block;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about h1 {
  font-family: var(--font-serif);
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 0 0 20px;
}

.page-about h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 16px;
}

.page-about h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-about .section-head .eyebrow {
  display: block;
  margin: 0 0 10px;
}

.page-about .section-head__lede {
  max-width: 720px;
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 28px 0 64px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -15% auto -15%;
  height: 560px;
  background:
    radial-gradient(58% 68% at 74% 4%, rgba(212, 175, 55, 0.18), transparent 72%),
    radial-gradient(52% 60% at 16% 12%, rgba(42, 157, 143, 0.13), transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero__lede {
  max-width: 640px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.86;
  margin: 0 0 28px;
}

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

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(18, 38, 58, 0.9), rgba(5, 12, 20, 0.9));
  box-shadow: var(--shadow-stack);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-stats {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  overflow: hidden;
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ink-night);
}

.page-about .about-stats__num {
  font-size: clamp(22px, 3.4vw, 30px);
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */

.page-about .chapter {
  position: relative;
  padding: 68px 0;
}

.page-about .chapter__aside {
  margin-bottom: 20px;
}

.page-about .chapter__body .prose {
  max-width: 620px;
}

/* ---------- 引用 ---------- */

.page-about .about-quote {
  max-width: 920px;
  margin: 8px auto;
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-quote blockquote {
  margin: 0;
}

.page-about .about-quote p {
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.6vw, 34px);
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
}

.page-about .about-quote figcaption {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

/* ---------- 发展节点 ---------- */

.page-about .timeline-band {
  position: relative;
  margin-top: 40px;
  padding: 36px 0 12px;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0), rgba(18, 38, 58, 0.6) 32%, rgba(11, 27, 43, 0));
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .timeline-band > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  pointer-events: none;
}

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

.page-about .timeline__node {
  position: relative;
}

.page-about .timeline__dot {
  display: block;
  width: 12px;
  height: 12px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(212, 175, 55, 0.14);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .timeline__node:hover .timeline__dot {
  transform: scale(1.05);
  box-shadow: 0 0 0 7px rgba(212, 175, 55, 0.22);
}

.page-about .timeline__title {
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 0;
  margin: 0 0 4px;
}

.page-about .timeline__sub {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-soft);
}

.page-about .timeline__more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
}

.page-about .timeline__more > summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--paper);
  opacity: 0.75;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .timeline__more > summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__more > summary::before {
  content: "＋";
  font-size: 13px;
  color: var(--gold);
}

.page-about .timeline__more[open] > summary::before {
  content: "－";
}

.page-about .timeline__more > summary:hover {
  opacity: 1;
  color: var(--gold-soft);
}

.page-about .timeline__more p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */

.page-about .team-figure {
  margin: 34px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: linear-gradient(200deg, rgba(18, 38, 58, 0.85), rgba(5, 12, 20, 0.9));
}

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

.page-about .team-figure figcaption {
  padding: 12px 18px 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .team-card {
  position: relative;
  padding: 26px 22px 30px;
  background: linear-gradient(165deg, rgba(18, 38, 58, 0.92), rgba(11, 27, 43, 0.94));
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--gold);
  border-radius: 3px 3px var(--about-radius) var(--about-radius);
  box-shadow: var(--shadow-stack);
  overflow: hidden;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(212, 175, 55, 0.14);
  border-radius: 2px 2px 12px 12px;
  pointer-events: none;
}

.page-about .team-card__index {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
  opacity: 0.9;
}

.page-about .team-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 服务覆盖 ---------- */

.page-about .coverage-panel {
  margin-top: 32px;
  padding: 24px 18px 22px;
  background: linear-gradient(180deg, rgba(18, 38, 58, 0.55), rgba(11, 27, 43, 0.4));
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
}

.page-about .coverage-dots {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .coverage-dot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  background: rgba(11, 27, 43, 0.6);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .coverage-dot::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(42, 157, 143, 0.16);
}

.page-about .coverage-dot__name {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--paper);
  opacity: 0.86;
  transition: color 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-about .coverage-dot:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: rgba(18, 38, 58, 0.9);
}

.page-about .coverage-dot:hover .coverage-dot__name {
  opacity: 1;
  color: var(--gold-soft);
}

.page-about .coverage-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 四条做法 ---------- */

.page-about .principle-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 22px 20px;
  border-left: 3px solid var(--gold);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.09), rgba(18, 38, 58, 0.5) 42%, rgba(11, 27, 43, 0.3));
}

.page-about .principle__index {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .principle__text h3 {
  margin-bottom: 8px;
}

.page-about .principle__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 页面出口 ---------- */

.page-about .about-next {
  padding: 72px 0 20px;
}

.page-about .about-next__title {
  margin-bottom: 28px;
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 22px;
  border: 1px solid var(--line-soft);
  border-radius: 4px 4px var(--about-radius) var(--about-radius);
  background: rgba(18, 38, 58, 0.45);
  text-decoration: none;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .next-card__label {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .next-card__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .next-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background: rgba(18, 38, 58, 0.85);
}

.page-about .next-card:hover .next-card__label {
  color: var(--gold-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .coverage-dots {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .principle-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .chapter {
    padding: 104px 0;
  }

  .page-about .chapter__grid {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .chapter__aside {
    margin-bottom: 0;
  }

  .page-about .about-hero {
    padding: 40px 0 84px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 56px;
  }

  .page-about .timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
    padding-top: 40px;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    top: 46px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(212, 175, 55, 0), var(--gold) 10%, var(--gold) 90%, rgba(212, 175, 55, 0));
    opacity: 0.45;
  }

  .page-about .timeline__node {
    padding-top: 28px;
  }

  .page-about .timeline__dot {
    position: absolute;
    top: 0;
    left: 0;
    margin-bottom: 0;
  }

  .page-about .team-figure {
    margin-top: 40px;
  }

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

@media (min-width: 1000px) {
  .page-about .coverage-dots {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .coverage-panel {
    padding: 32px 30px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .coverage-dot,
  .page-about .next-card,
  .page-about .timeline__dot {
    transition: none;
  }

  .page-about .coverage-dot:hover,
  .page-about .next-card:hover,
  .page-about .timeline__node:hover .timeline__dot {
    transform: none;
  }
}