.page-about {
  --about-gap: clamp(1.25rem, 3vw, 2.5rem);
  --about-bodyw: 66ch;
  background: var(--void);
  color: var(--mist);
  overflow-x: hidden;
}

.page-about .about-lede {
  max-width: 46rem;
  margin: 1.25rem 0 0;
  color: var(--mist);
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
}

.page-about .about-sec-head {
  max-width: 52rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-sec-head h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin: 0.5rem 0 0;
  color: var(--mist);
  text-shadow: 0 0 18px rgba(217, 169, 74, 0.16);
}

.page-about .about-sec-lede {
  margin: 1rem 0 0;
  max-width: 58ch;
  color: var(--violet-grey);
  line-height: 1.85;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(2.25rem, 6vw, 4rem);
  border-bottom: var(--line-gold);
  background:
    radial-gradient(120% 90% at 82% 4%, rgba(110, 123, 255, 0.22), transparent 62%),
    radial-gradient(90% 70% at 6% 100%, rgba(79, 227, 208, 0.14), transparent 64%),
    linear-gradient(180deg, var(--night), var(--void) 72%);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.34;
}

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

.page-about .about-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--void) 6%, rgba(20, 11, 38, 0.72) 52%, rgba(20, 11, 38, 0.24) 100%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 56rem;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  font-size: 0.8125rem;
  color: var(--violet-grey);
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 6.4vw, 4rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin: 0.75rem 0 0;
  color: var(--mist);
  text-shadow: 0 0 1px rgba(217, 169, 74, 0.9), 0 0 34px rgba(217, 169, 74, 0.28);
}

.page-about .about-hero-marks {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr;
  background: rgba(217, 169, 74, 0.26);
  border: var(--line-gold);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-hero-marks li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.9rem 1rem;
  background: rgba(20, 11, 38, 0.78);
}

.page-about .mark-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}

.page-about .mark-label {
  font-size: 0.8125rem;
  color: var(--violet-grey);
}

.page-about .about-hero-note {
  display: none;
  position: absolute;
  right: clamp(0.75rem, 3vw, 2.5rem);
  top: 46%;
  z-index: 2;
  letter-spacing: 0.34em;
  color: var(--violet-grey);
  font-size: 12px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--void), var(--night) 78%);
}

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

.page-about .tl-item {
  display: grid;
  grid-template-columns: clamp(2.75rem, 8vw, 4.5rem) minmax(0, 1fr);
  gap: clamp(0.75rem, 2.4vw, 1.5rem);
  padding-bottom: clamp(1.25rem, 3vw, 2rem);
}

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

.page-about .tl-scale {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.35rem;
}

.page-about .tl-scale::after {
  content: "";
  position: absolute;
  top: 2.6rem;
  bottom: calc(-1 * clamp(1.25rem, 3vw, 2rem));
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, rgba(217, 169, 74, 0.5), rgba(217, 169, 74, 0.06));
}

.page-about .tl-item:last-child .tl-scale::after {
  display: none;
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .tl-pin {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--nebula);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(20, 11, 38, 0.9);
}

.page-about .tl-item--current .tl-ver {
  color: var(--gold-bright);
  text-shadow: 0 0 16px rgba(242, 212, 138, 0.55);
}

.page-about .tl-item--current .tl-pin {
  width: 14px;
  height: 14px;
  background: var(--gold-bright);
  box-shadow: 0 0 0 4px rgba(20, 11, 38, 0.9), 0 0 20px 4px rgba(242, 212, 138, 0.5);
}

.page-about .tl-body {
  position: relative;
  padding: 1.05rem 1.15rem 1.15rem;
  border: var(--line-gold);
  border-left: 2px solid rgba(217, 169, 74, 0.6);
  border-radius: var(--radius-m);
  background: linear-gradient(155deg, rgba(44, 27, 82, 0.92), rgba(30, 18, 56, 0.92));
  box-shadow: var(--shadow-paper);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .tl-item:hover .tl-body,
.page-about .tl-body:focus-visible {
  transform: translateY(-4px);
  border-left-color: var(--gold-bright);
  box-shadow: var(--shadow-lift);
}

.page-about .tl-body:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .tl-body h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .tl-body p {
  margin: 0.6rem 0 0;
  color: var(--violet-grey);
  line-height: 1.8;
  font-size: 0.9375rem;
}

.page-about .tl-more {
  color: var(--mist) !important;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(79, 227, 208, 0.5);
}

/* ---------- 窄幅注释带 ---------- */
.page-about .about-band {
  border-top: var(--line-gold);
  border-bottom: var(--line-gold);
  background:
    radial-gradient(80% 120% at 90% 20%, rgba(217, 169, 74, 0.14), transparent 60%),
    linear-gradient(100deg, rgba(44, 27, 82, 0.96), rgba(20, 11, 38, 0.96));
  padding: clamp(1.6rem, 4vw, 2.75rem) 0;
}

.page-about .about-band-inner {
  display: grid;
  gap: 1rem;
}

.page-about .about-band-quote {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  line-height: 1.6;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}

.page-about .about-band-note {
  margin: 0;
  color: var(--violet-grey);
  font-size: 0.875rem;
  line-height: 1.8;
  max-width: 40ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--night), var(--void));
}

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

.page-about .column-chart {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.page-about .col-item {
  padding-left: 0.9rem;
  border-left: 2px solid rgba(217, 169, 74, 0.35);
  transition: border-color 0.25s var(--ease);
}

.page-about .col-item:hover {
  border-left-color: var(--cyan);
}

.page-about .col-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.page-about .col-name {
  font-weight: 600;
  color: var(--mist);
  font-size: 0.9688rem;
}

.page-about .col-count {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gold-bright);
}

.page-about .col-track {
  display: block;
  height: 8px;
  margin: 0.5rem 0 0.45rem;
  border-radius: var(--radius-pill);
  background: rgba(242, 238, 248, 0.08);
  overflow: hidden;
}

.page-about .col-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--gold), var(--gold-bright));
  box-shadow: 0 0 14px rgba(217, 169, 74, 0.4);
}

.page-about .col-fill--14 { width: 100%; }
.page-about .col-fill--12 { width: 86%; }
.page-about .col-fill--8 { width: 57%; }

.page-about .col-duty {
  margin: 0;
  font-size: 0.8438rem;
  line-height: 1.75;
  color: var(--violet-grey);
}

.page-about .about-figure {
  margin: 0;
  border: var(--line-gold);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--nebula);
}

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

.page-about .fig-cap {
  margin: 0;
  padding: 0.7rem 0.9rem;
  font-size: 0.7813rem;
  line-height: 1.7;
  color: var(--violet-grey);
  border-top: var(--line-gold);
  background: rgba(20, 11, 38, 0.72);
}

/* ---------- 工序 ---------- */
.page-about .about-process {
  background:
    radial-gradient(70% 60% at 12% 0%, rgba(110, 123, 255, 0.16), transparent 58%),
    var(--night);
  border-top: var(--line-gold);
}

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

.page-about .step-stack {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .step {
  position: relative;
  padding: 1.1rem 1.15rem 1.2rem;
  border: var(--line-gold);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(44, 27, 82, 0.94), rgba(20, 11, 38, 0.94));
  box-shadow: var(--shadow-paper);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.page-about .step-no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.page-about .step h3 {
  margin: 0.35rem 0 0;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .step p {
  margin: 0.5rem 0 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--violet-grey);
}

.page-about .about-figure--sticky {
  align-self: start;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partner {
  background: linear-gradient(180deg, var(--night), var(--void));
}

.page-about .partner-grid {
  display: grid;
  gap: 1rem;
}

.page-about .partner-card {
  padding: 1.2rem 1.15rem 1.3rem;
  border-top: 2px solid var(--gold);
  background: linear-gradient(165deg, rgba(44, 27, 82, 0.94), rgba(30, 18, 56, 0.94));
}

.page-about .partner-tag {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .partner-card h3 {
  margin: 0.5rem 0 0;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .partner-card p:last-child {
  margin: 0.55rem 0 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--violet-grey);
}

.page-about .honor-grid {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.page-about .honor {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.7rem 0.75rem;
  border: var(--line-gold);
  border-radius: var(--radius-pill);
  background: rgba(44, 27, 82, 0.6);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .honor:hover {
  transform: translateY(-3px);
  border-color: var(--gold-bright);
  background: rgba(44, 27, 82, 0.92);
}

.page-about .honor-name {
  font-size: 0.8125rem;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .honor-meta {
  font-size: 0.7188rem;
  color: var(--violet-grey);
  line-height: 1.5;
}

/* ---------- 数据看板 ---------- */
.page-about .about-stats {
  background: var(--void);
  border-top: var(--line-gold);
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(217, 169, 74, 0.22);
  border: var(--line-gold);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .stat-cell {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0.85rem 1.1rem;
  background: linear-gradient(180deg, var(--nebula), var(--night));
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.25rem, 3.4vw, 1.75rem);
  color: var(--gold-bright);
  letter-spacing: 0.02em;
  text-shadow: 0 0 18px rgba(242, 212, 138, 0.22);
}

.page-about .stat-label {
  font-size: 0.7813rem;
  line-height: 1.6;
  color: var(--violet-grey);
}

.page-about .stat-foot {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  max-width: 58ch;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--violet-grey);
  padding-left: 0.9rem;
  border-left: 2px solid rgba(79, 227, 208, 0.45);
}

/* ---------- 联络 ---------- */
.page-about .about-reach {
  background:
    radial-gradient(90% 80% at 88% 90%, rgba(255, 138, 61, 0.14), transparent 60%),
    linear-gradient(180deg, var(--night), var(--void));
  border-top: var(--line-gold);
}

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

.page-about .reach-main h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin: 0.5rem 0 0;
  color: var(--mist);
  text-shadow: 0 0 18px rgba(217, 169, 74, 0.16);
}

.page-about .reach-lede {
  max-width: 46ch;
}

.page-about .reach-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.page-about .reach-link-note {
  margin: 1.1rem 0 0;
  font-size: 0.875rem;
  color: var(--violet-grey);
}

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

.page-about .reach-link-note a:hover {
  color: var(--gold-bright);
}

.page-about .reach-card {
  padding: 1.25rem 1.15rem 1.3rem;
  border: var(--line-gold);
  border-radius: var(--radius-m);
  background: linear-gradient(165deg, rgba(44, 27, 82, 0.94), rgba(20, 11, 38, 0.94));
  box-shadow: var(--shadow-paper);
  align-self: start;
}

.page-about .reach-card h3 {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
  padding-bottom: 0.7rem;
  border-bottom: var(--line-gold);
}

.page-about .reach-list {
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .reach-row {
  display: grid;
  gap: 0.15rem;
}

.page-about .reach-row dt {
  font-size: 0.7188rem;
  letter-spacing: 0.12em;
  color: var(--violet-grey);
}

.page-about .reach-row dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.page-about .reach-legal {
  margin: 1.1rem 0 0;
  padding-top: 0.85rem;
  border-top: var(--line-gold);
  font-size: 0.7188rem;
  color: var(--violet-grey);
  letter-spacing: 0.06em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 40rem) {
  .page-about .about-hero-marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 48rem) {
  .page-about .about-band-inner {
    grid-template-columns: 1.5fr 1fr;
    align-items: end;
    gap: 2rem;
  }

  .page-about .step:nth-child(2) {
    margin-left: 0.75rem;
  }

  .page-about .step:nth-child(3) {
    margin-left: 1.5rem;
  }

  .page-about .step:nth-child(4) {
    margin-left: 2.25rem;
  }

  .page-about .about-hero-marks li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

@media (min-width: 52rem) {
  .page-about .team-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .process-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .about-figure--sticky {
    position: sticky;
    top: 2rem;
  }

  .page-about .honor-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .honor {
    border-radius: var(--radius-m);
  }
}

@media (min-width: 56rem) {
  .page-about .reach-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: clamp(1.5rem, 4vw, 3rem);
  }
}

@media (min-width: 64rem) {
  .page-about .about-hero-note {
    display: block;
  }

  .page-about .about-hero-inner {
    padding-right: 3rem;
  }
}

@media (hover: hover) and (min-width: 48rem) {
  .page-about .tl-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0 !important;
    padding-top: 0;
    padding-bottom: 0;
    transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease), margin 0.3s var(--ease), padding 0.3s var(--ease);
  }

  .page-about .tl-item:hover .tl-more,
  .page-about .tl-body:focus-visible .tl-more {
    max-height: 12rem;
    opacity: 1;
    margin-top: 0.6rem !important;
    padding-top: 0.1rem;
    padding-bottom: 0.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-body,
  .page-about .step,
  .page-about .honor {
    transition: none;
  }

  .page-about .tl-item:hover .tl-body,
  .page-about .tl-body:focus-visible,
  .page-about .step:hover,
  .page-about .honor:hover {
    transform: none;
  }
}