.page-about {
  --about-line: rgba(34, 48, 64, 0.85);
  --about-indigo: rgba(35, 26, 61, 0.82);
  --about-wine: rgba(58, 22, 38, 0.78);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(88px, 14vh, 150px) 0 clamp(52px, 8vh, 84px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 72% at 8% 0%, rgba(35, 26, 61, 0.92), transparent 64%),
    radial-gradient(46% 62% at 94% 14%, rgba(198, 255, 61, 0.13), transparent 68%),
    radial-gradient(40% 52% at 72% 100%, rgba(24, 224, 255, 0.08), transparent 72%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--neon) 18%, var(--electric) 52%, transparent 92%);
  opacity: 0.55;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 22px;
  font-size: 13px;
}

.page-about .about-hero h1 {
  margin: 10px 0 18px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 3.9rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero .lede {
  max-width: 64ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  color: var(--text-dim);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 4.5vw, 48px);
  overflow: hidden;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-lg);
  background: var(--graphite);
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px 22px;
  background: var(--slate);
}

.page-about .hero-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stat__label {
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc-section {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-toc__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .toc__link {
  display: block;
  padding: 13px 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--pill);
  color: var(--text-dim);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .toc__link:hover,
.page-about .toc__link:focus-visible {
  color: var(--ink);
  background: var(--neon);
  border-color: var(--neon);
}

.page-about .toc__link[aria-current="true"] {
  color: var(--ink);
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: var(--shadow-neon);
}

/* ---------- 品牌手册章节骨架 ---------- */
.page-about .chapter-band {
  position: relative;
  padding-top: clamp(58px, 8vh, 96px);
  padding-bottom: clamp(58px, 8vh, 96px);
}

.page-about .chapter-band.band--indigo {
  background: linear-gradient(160deg, var(--about-indigo), rgba(5, 7, 10, 0.98) 88%);
}

.page-about .chapter-band.band--wine {
  background: linear-gradient(200deg, var(--about-wine), rgba(5, 7, 10, 0.98) 86%);
}

.page-about .chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .chapter__mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--neon);
}

.page-about .chapter__label {
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--text-dim);
}

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

.page-about .chapter-title {
  margin: 0 0 14px;
  max-width: 26ch;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .chapter-lede {
  max-width: 58ch;
  margin: 0 0 16px;
  font-size: clamp(1rem, 1.35vw, 1.08rem);
  color: var(--text-dim);
}

.page-about .chapter__body p {
  max-width: 62ch;
}

.page-about .chapter-note {
  padding-left: 16px;
  border-left: 2px solid var(--neon-deep);
  font-size: 14px;
  color: var(--text-dim);
}

.page-about .chapter-note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .chapter__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 成长轨迹 ---------- */
.page-about .seasons-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 26px;
}

.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
  border-left: 1px solid var(--about-line);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--neon);
}

.page-about .timeline__year {
  display: inline-block;
  margin-bottom: 6px;
  padding: 3px 12px;
  border: 1px solid var(--graphite);
  border-radius: var(--pill);
  background: var(--slate);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--electric);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  color: var(--text-dim);
}

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

.page-about .about-figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-figure .media-frame__cap {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: rgba(14, 20, 27, 0.82);
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .team-card:hover {
  border-color: var(--neon-deep);
  transform: translateY(-4px);
}

.page-about .team-card__count {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .team-card__count span {
  margin-left: 0.12em;
  font-family: var(--font-body);
  font-size: 0.4em;
  font-weight: 500;
  color: var(--text-dim);
}

.page-about .team-card__role {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-dim);
}

.page-about .about-figure--team {
  margin-top: 28px;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-figure--map {
  margin-top: 26px;
}

.page-about .coverage-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line);
}

.page-about .coverage-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .coverage-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage-stat__label {
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- 合作与认可 ---------- */
.page-about .partners-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-item {
  padding: 22px 22px 20px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--neon-deep);
  border-radius: var(--radius-md);
  background: rgba(5, 7, 10, 0.55);
}

.page-about .partner-item__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .partner-item__desc {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-dim);
}

/* ---------- 我们的做法 ---------- */
.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .principle {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  padding: 20px 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: var(--slate);
}

.page-about .principle__num {
  grid-row: 1 / span 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--graphite);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--neon);
}

.page-about .principle__title {
  margin: 10px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .principle__text {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-dim);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(56px, 8vh, 92px) 0 clamp(64px, 9vh, 104px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-cta__box {
  display: grid;
  gap: 22px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid rgba(198, 255, 61, 0.32);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(70% 120% at 6% 0%, rgba(35, 26, 61, 0.9), transparent 70%),
    var(--slate);
  box-shadow: var(--shadow-panel);
}

.page-about .about-cta__text h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-cta__text p {
  max-width: 58ch;
  margin: 0;
  color: var(--text-dim);
}

.page-about .about-cta__text a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-about .about-cta__contact {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--about-line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 600px) {
  .page-about .coverage-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 980px) {
  .page-about .chapter {
    grid-template-columns: 178px minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .chapter__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .page-about .seasons-layout {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-figure--team {
    margin-top: 34px;
  }

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

@media (min-width: 1200px) {
  .page-about .chapter {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 68px;
  }

  .page-about .about-cta__box {
    padding: 52px 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .toc__link {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}