/* ===== 品牌概况页 page-about ===== */
.page-about {
  --about-band-pad: 48px;
}

/* 首屏窄幅引言 */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 42px;
  border-bottom: 2px solid var(--c-ink);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127, 231, 223, .075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 231, 223, .075) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  pointer-events: none;
}

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

.page-about .about-title {
  margin: 14px 0 18px;
  max-width: 24ch;
  font-size: clamp(27px, 5.6vw, 44px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--text-strong);
}

.page-about .about-lede {
  max-width: 64ch;
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 通用区块节奏 */
.page-about .about-history,
.page-about .about-lines,
.page-about .about-team,
.page-about .about-stats,
.page-about .about-next {
  padding: var(--about-band-pad) 0;
}

/* 图片容器 */
.page-about .media-frame {
  display: block;
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--c-ink);
  box-shadow: var(--shadow-hard);
  background: var(--c-steel);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-dim);
  background: var(--c-deep);
  border-top: 1px solid var(--line);
}

/* 发展历程时间线 */
.page-about .about-history-visual {
  margin: 0 0 34px;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-orange) 0%, var(--c-cyan) 36%, rgba(34, 211, 197, .10) 100%);
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 30px;
}

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

.page-about .timeline-num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--c-ink);
  background: var(--c-steel);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  box-shadow: var(--shadow-hard-sm);
  transition: transform .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
}

.page-about .timeline-item:hover .timeline-num {
  transform: translate(2px, -2px);
  border-color: var(--c-cyan);
  color: var(--c-orange);
}

.page-about .timeline-phase {
  margin: 3px 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-orange);
}

.page-about .timeline-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .timeline-text {
  max-width: 66ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
  transition: color .16s var(--ease);
}

.page-about .timeline-item:hover .timeline-text {
  color: var(--text);
}

/* 四条主线索引网格 */
.page-about .about-lines {
  border-top: 2px solid var(--c-ink);
  border-bottom: 2px solid var(--c-ink);
}

.page-about .about-lines-visual {
  margin: 0 0 30px;
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-card {
  position: relative;
  padding: 22px 20px 20px;
  border: 2px solid rgba(127, 231, 223, .28);
  background: var(--c-deep);
  box-shadow: var(--shadow-hard-sm);
  transition: transform .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.page-about .about-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--c-cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .about-card:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
  border-color: var(--c-cyan);
}

.page-about .about-card-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-cyan);
}

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

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

/* 团队分工 */
.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .role-card {
  padding: 22px 20px;
  border: 2px solid rgba(127, 231, 223, .26);
  border-top: 4px solid var(--c-orange);
  background: var(--c-steel);
}

.page-about .role-num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  line-height: 1;
  color: rgba(127, 231, 223, .45);
}

.page-about .role-title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text-strong);
}

.page-about .role-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-cadence {
  margin-top: 22px;
}

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

/* 数量看板 */
.page-about .about-stats {
  background: var(--c-paper);
  border-top: 2px solid var(--c-ink);
  border-bottom: 2px solid var(--c-ink);
}

.page-about .about-stats .eyebrow {
  color: var(--c-steel);
}

.page-about .about-stats .section-title {
  color: var(--c-ink);
}

.page-about .about-stats .section-lede {
  color: #35495f;
}

.page-about .about-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .board-cell {
  padding: 18px 16px;
  border: 2px solid var(--c-ink);
  background: var(--c-cyan-soft);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .board-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-deep);
}

.page-about .board-label {
  margin: 10px 0 6px;
  font-size: 14px;
  font-weight: 800;
  color: var(--c-ink);
}

.page-about .board-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: #1f3b57;
}

.page-about .about-board-band {
  margin: 26px 0 0;
}

.page-about .about-coverage {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #35495f;
}

.page-about .about-coverage-label {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  border: 2px solid var(--c-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-paper);
  background: var(--c-steel);
}

.page-about .about-coverage .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink);
}

/* 常用入口 */
.page-about .about-next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .next-link {
  display: block;
  padding: 18px 18px 16px;
  border: 2px solid rgba(127, 231, 223, .26);
  background: var(--c-steel);
  color: var(--text);
  text-decoration: none;
  transition: transform .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.page-about .next-link:hover {
  transform: translate(-2px, -2px);
  border-color: var(--c-cyan);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .next-link:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
  border-color: var(--c-cyan);
}

.page-about .next-link strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--text-strong);
}

.page-about .next-link span {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .next-arrow {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-style: normal;
  letter-spacing: .04em;
  color: var(--c-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 480px) {
  .page-about .about-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-history,
  .page-about .about-lines,
  .page-about .about-team,
  .page-about .about-stats,
  .page-about .about-next {
    padding: 60px 0;
  }

  .page-about .about-hero {
    padding: 34px 0 54px;
  }
}

@media (min-width: 900px) {
  .page-about .about-board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline::before {
    left: 22px;
  }

  .page-about .timeline-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 22px;
    padding-bottom: 34px;
  }

  .page-about .timeline-num {
    width: 46px;
    height: 46px;
  }
}
<<<END>>>