.page-about {
  background: var(--ink);
  color: var(--white);
  overflow-x: clip;
}

.page-about .section {
  padding: clamp(54px, 9vw, 104px) 0;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
}

.page-about .lede {
  margin-top: 16px;
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.78;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + 52px);
  background:
    radial-gradient(130% 72% at 88% 0%, rgba(255, 90, 31, 0.20), transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(25, 211, 230, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--coal) 100%);
  border-bottom: var(--line-strong) solid var(--steel);
}

.page-about .about-hero-inner {
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.6vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 22ch;
}

.page-about .about-hero-lede {
  color: var(--warm);
  margin-top: 22px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-hero-media {
  margin: 0;
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

/* ---------- 数据带 ---------- */
.page-about .about-stats {
  background: var(--coal);
  border-bottom: var(--line-strong) solid var(--steel);
}

.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--line-strong);
  background: var(--steel);
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .about-strip .data-cell {
  background: var(--coal);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-strip .figure {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .about-strip .figure--flame {
  color: var(--flame);
}

.page-about .about-strip .figure--cyan {
  color: var(--cyan);
}

.page-about .about-strip .figure-label {
  color: var(--warm);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  background: var(--ink);
  color: var(--white);
}

.page-about .origin-grid {
  display: grid;
  gap: 30px;
}

.page-about .origin-body p {
  margin: 0 0 18px;
  color: var(--warm);
  line-height: 1.78;
}

.page-about .origin-body p:last-child {
  margin-bottom: 0;
  color: var(--white);
  font-weight: 500;
  padding-left: 18px;
  border-left: var(--line-strong) solid var(--flame);
}

/* ---------- 内容流水线 ---------- */
.page-about .about-flow {
  background: var(--white);
  color: var(--ink);
}

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

.page-about .about-flow .lede {
  color: var(--warm-ink);
}

.page-about .flow-track {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  border-top: var(--line-strong) solid var(--ink);
}

.page-about .flow-step {
  position: relative;
  padding: 24px 0 26px 24px;
  border-bottom: var(--line) solid rgba(11, 13, 16, 0.16);
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 32px;
  width: 12px;
  height: 3px;
  background: var(--flame);
}

.page-about .flow-step:nth-child(even)::before {
  background: var(--cyan);
}

.page-about .flow-time {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--ember);
  margin-bottom: 8px;
}

.page-about .flow-step:nth-child(even) .flow-time {
  color: var(--teal);
}

.page-about .flow-step h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.12rem, 2.6vw, 1.5rem);
  line-height: 1.2;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .flow-step p {
  margin: 0;
  max-width: 66ch;
  color: var(--warm-ink);
  font-size: 0.97rem;
  line-height: 1.75;
}

.page-about .about-flow-media {
  margin: 44px 0 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: var(--line-strong) solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--coal);
}

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

/* ---------- 团队与基地 ---------- */
.page-about .about-team {
  background: var(--coal);
  color: var(--white);
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .about-team .lede {
  color: var(--warm);
}

.page-about .team-layout {
  display: grid;
  gap: 34px;
  margin-top: 38px;
}

.page-about .team-roles .accordion-item {
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .team-roles .accordion-item:last-child {
  border-bottom: var(--line-strong) solid var(--steel);
}

.page-about .team-roles .accordion-trigger {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  text-align: left;
}

.page-about .team-roles .role-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  line-height: 1.25;
}

.page-about .team-roles .role-count {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .team-roles .accordion-panel-inner p {
  margin: 0;
  color: var(--warm);
  font-size: 0.96rem;
  line-height: 1.76;
  max-width: 60ch;
}

.page-about .team-media {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: var(--line-strong) solid var(--steel);
  box-shadow: var(--shadow-cyan);
}

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

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  background: var(--ink);
  color: var(--white);
}

.page-about .about-timeline .lede {
  color: var(--warm);
}

.page-about .timeline {
  position: relative;
  margin-top: 42px;
  padding-left: 26px;
  border-left: var(--line-strong) solid var(--steel);
}

.page-about .timeline-item {
  position: relative;
  padding-top: 22px;
  padding-bottom: 28px;
  border-bottom: var(--line) solid rgba(42, 47, 54, 0.75);
}

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

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 28px;
  width: 12px;
  height: 12px;
  background: var(--flame);
}

.page-about .timeline-item:nth-child(even)::before {
  background: var(--cyan);
}

.page-about .timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--warm);
  margin-bottom: 10px;
}

.page-about .timeline-item .accordion-trigger {
  width: 100%;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  line-height: 1.25;
  color: var(--white);
}

.page-about .timeline-item .accordion-panel-inner p {
  margin: 0;
  color: var(--warm);
  font-size: 0.96rem;
  line-height: 1.76;
  max-width: 64ch;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  background: var(--white);
  color: var(--ink);
}

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

.page-about .about-honor .lede {
  color: var(--warm-ink);
}

.page-about .honor-wall {
  display: grid;
  gap: 0;
  margin-top: 38px;
  background: var(--ink);
  border: var(--line-strong) solid var(--ink);
}

.page-about .honor-block {
  background: var(--white);
  padding: 26px 22px;
  border-bottom: var(--line-strong) solid var(--ink);
  transition: background 0.24s var(--ease), color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .honor-block:last-child {
  border-bottom: 0;
}

.page-about .honor-block:hover,
.page-about .honor-block:focus-within {
  background: var(--flame);
  color: var(--white);
  transform: translate(-5px, -5px);
}

.page-about .honor-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ember);
  border: 2px solid currentColor;
  padding: 3px 8px;
  margin-bottom: 14px;
}

.page-about .honor-block:hover .honor-type {
  color: var(--white);
}

.page-about .honor-block h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.12rem, 2.8vw, 1.5rem);
  line-height: 1.2;
  margin: 0 0 10px;
}

.page-about .honor-block p {
  margin: 0;
  color: var(--warm-ink);
  font-size: 0.95rem;
  line-height: 1.72;
}

.page-about .honor-block:hover p {
  color: rgba(244, 246, 248, 0.92);
}

/* ---------- 联系与备案 ---------- */
.page-about .about-contact {
  background: var(--ink);
  color: var(--white);
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .about-contact .lede {
  color: var(--warm);
}

.page-about .contact-intro .btn {
  margin-top: 26px;
}

.page-about .contact-layout {
  display: grid;
  gap: 34px;
}

.page-about .contact-list {
  margin: 0;
  border-top: var(--line-strong) solid var(--steel);
}

.page-about .contact-list > div {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-bottom: var(--line) solid var(--steel);
  align-items: baseline;
}

.page-about .contact-list dt {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--warm);
}

.page-about .contact-list dd {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.62;
  color: var(--white);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .flow-step {
    padding-left: 30px;
  }

  .page-about .contact-list > div {
    grid-template-columns: 110px minmax(0, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-strip .data-cell {
    padding: 28px 22px;
  }

  .page-about .flow-track {
    margin-top: 48px;
  }

  .page-about .flow-step {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 24px;
    padding: 28px 0 30px 30px;
  }

  .page-about .flow-step::before {
    top: 36px;
  }

  .page-about .flow-time {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
    padding-top: 4px;
  }

  .page-about .flow-step h3 {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .flow-step p {
    grid-column: 2;
    grid-row: 2;
  }

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

  .page-about .honor-block {
    border-bottom: 0;
    border-right: var(--line-strong) solid var(--ink);
    padding: 32px 26px;
  }

  .page-about .honor-block:last-child {
    border-right: 0;
  }
}

@media (min-width: 960px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .contact-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .timeline {
    padding-left: 34px;
  }

  .page-about .timeline-item::before {
    left: -41px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-media img {
    max-height: 620px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .honor-block {
    transition: none;
  }

  .page-about .honor-block:hover,
  .page-about .honor-block:focus-within {
    transform: none;
  }
}