.page-about {
  --about-index-w: 208px;
  --about-doc-gap: clamp(2rem, 4vw, 3.5rem);
  background-color: var(--c28-ink);
  color: var(--c28-paper);
  font-family: var(--c28-sans);
  overflow-x: clip;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2rem, 5vw, 3.75rem);
  background:
    radial-gradient(58% 68% at 88% 6%, rgba(57, 224, 208, 0.16), transparent 62%),
    radial-gradient(50% 62% at 4% 100%, rgba(230, 184, 92, 0.12), transparent 66%),
    linear-gradient(174deg, var(--c28-ink-2) 0%, var(--c28-ink) 80%);
  border-bottom: 1px solid var(--c28-hair);
}

.page-about .about-crumb {
  margin-bottom: clamp(1rem, 2.5vw, 1.6rem);
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--c28-hair-strong);
  border-radius: var(--c28-radius);
  background: rgba(17, 28, 51, 0.55);
  padding: clamp(1.35rem, 3.6vw, 2.85rem);
  overflow: hidden;
  box-shadow: 0 26px 64px -36px rgba(0, 0, 0, 0.88);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--c28-hair-strong) 0 1px, transparent 1px 13px);
  opacity: 0.9;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34%;
  height: 100%;
  background: linear-gradient(215deg, rgba(57, 224, 208, 0.1), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  color: var(--c28-gold);
}

.page-about .about-hero__title {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 22ch;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.7vw, 1.08rem);
  line-height: 1.85;
  color: var(--c28-text-dim);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.5rem, 3.4vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c28-hair);
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  overflow: hidden;
}

.page-about .about-stats > li {
  background: rgba(11, 18, 32, 0.78);
  padding: 0.9rem 1rem 1rem;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--c28-mono);
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
  color: var(--c28-cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--c28-text-dim);
}

/* ---------- 档案双栏 ---------- */
.page-about .about-doc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-doc-gap);
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-index {
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  background: rgba(17, 28, 51, 0.62);
  padding: 1rem 1rem 1.1rem;
}

.page-about .about-index__title {
  margin: 0;
  font-family: var(--c28-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c28-gold);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.25rem;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.55rem;
  border-radius: 10px;
  color: var(--c28-paper);
  text-decoration: none;
  font-size: 0.86rem;
  line-height: 1.45;
  transition: background 0.22s var(--c28-ease), color 0.22s var(--c28-ease), transform 0.22s var(--c28-ease);
}

.page-about .about-index__num {
  font-family: var(--c28-mono);
  font-size: 0.7rem;
  color: var(--c28-gold);
  flex: none;
}

.page-about .about-index__link:hover {
  background: rgba(57, 224, 208, 0.12);
  color: var(--c28-cyan);
  transform: translateX(2px);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--c28-cyan);
  outline-offset: 2px;
  color: var(--c28-cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-block {
  scroll-margin-top: 7rem;
}

.page-about .about-block + .about-block {
  margin-top: clamp(2.75rem, 6vw, 4.75rem);
}

.page-about .about-h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  font-weight: 780;
  line-height: 1.25;
  letter-spacing: -0.02em;
  max-width: 26ch;
}

.page-about .about-text {
  margin: clamp(0.85rem, 2vw, 1.15rem) 0 0;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c28-text-dim);
}

.page-about .about-split {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.75rem);
  align-items: start;
}

.page-about .about-paper {
  background: linear-gradient(180deg, var(--c28-paper) 0%, var(--c28-paper-2) 100%);
  color: var(--c28-ink);
  border-radius: var(--c28-radius);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  box-shadow: 0 22px 48px -32px rgba(0, 0, 0, 0.92);
}

.page-about .about-paper h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.01em;
  color: var(--c28-ink);
}

.page-about .about-paper p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.82;
  color: #3b465c;
}

.page-about .about-paper--wide {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-note {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 46ch;
  padding: 0.35rem 0 0.35rem 0.9rem;
  border-left: 2px solid var(--c28-gold);
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--c28-text-dim);
}

/* ---------- 时间线 ---------- */
.page-about .about-scale {
  height: 12px;
  margin: clamp(1.25rem, 3vw, 1.9rem) 0 0;
  border-radius: 2px;
  background-image: repeating-linear-gradient(90deg, var(--c28-hair-strong) 0 1px, transparent 1px 12px);
  opacity: 0.85;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: clamp(1.1rem, 2.6vw, 1.6rem);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: 0.5rem 1rem;
}

.page-about .about-timeline__year {
  font-family: var(--c28-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c28-gold);
  padding-top: 0.12rem;
}

.page-about .about-timeline__body {
  position: relative;
  border-left: 1px solid var(--c28-hair-strong);
  padding-left: 1.15rem;
  transition: border-color 0.24s var(--c28-ease);
}

.page-about .about-timeline__body::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c28-gold);
  box-shadow: 0 0 0 4px rgba(230, 184, 92, 0.16);
}

.page-about .about-timeline__item:hover .about-timeline__body {
  border-color: rgba(230, 184, 92, 0.5);
}

.page-about .about-timeline__item:hover .about-timeline__desc {
  color: var(--c28-paper);
}

.page-about .about-timeline__title {
  margin: 0 0 0.35rem;
  font-size: 1.03rem;
  font-weight: 680;
  letter-spacing: -0.01em;
  color: var(--c28-paper);
}

.page-about .about-timeline__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--c28-text-dim);
  transition: color 0.24s var(--c28-ease);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: clamp(1.4rem, 3.2vw, 2.2rem) 0 0;
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--c28-radius-sm);
  border: 1px solid var(--c28-hair);
  background: var(--c28-ink-2);
}

.page-about .about-figure__cap {
  margin: 0.7rem 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--c28-slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-team__item {
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  background: rgba(255, 255, 255, 0.035);
  padding: 1.05rem 1.1rem 1.15rem;
  transition: transform 0.22s var(--c28-ease), border-color 0.22s var(--c28-ease), background 0.22s var(--c28-ease);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  transform: translateY(-3px);
  border-color: rgba(57, 224, 208, 0.4);
  background: rgba(57, 224, 208, 0.07);
}

.page-about .about-team__item:focus-visible {
  outline: 2px solid var(--c28-cyan);
  outline-offset: 2px;
}

.page-about .about-team__name {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--c28-paper);
  letter-spacing: -0.01em;
}

.page-about .about-team__name::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.5rem;
  border-radius: 2px;
  background: var(--c28-cyan);
  transform: translateY(-2px);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--c28-text-dim);
}

/* ---------- 合作 ---------- */
.page-about .about-partner-list {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c28-hair);
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  overflow: hidden;
}

.page-about .about-partner-list__item {
  background: rgba(17, 28, 51, 0.72);
  padding: 0.95rem 1.05rem 1.05rem;
}

.page-about .about-partner-list__key {
  display: block;
  font-family: var(--c28-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--c28-cyan);
}

.page-about .about-partner-list__val {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--c28-paper);
}

/* ---------- 支持渠道 ---------- */
.page-about .about-channels {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.page-about .about-channel {
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  background: rgba(17, 28, 51, 0.6);
  padding: 1rem 1.05rem 1.1rem;
}

.page-about .about-channel__key {
  display: block;
  font-family: var(--c28-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--c28-gold);
}

.page-about .about-channel__val {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--c28-paper);
  overflow-wrap: anywhere;
}

.page-about .about-channel__val a {
  color: var(--c28-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 224, 208, 0.35);
}

.page-about .about-channel__val a:hover {
  border-bottom-color: var(--c28-cyan);
}

.page-about .about-channel__desc {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--c28-text-dim);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  border: 1px solid rgba(255, 107, 74, 0.34);
  border-radius: var(--c28-radius);
  background: linear-gradient(132deg, rgba(255, 107, 74, 0.16), rgba(57, 224, 208, 0.1));
  padding: clamp(1.25rem, 3.4vw, 2.1rem);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
  justify-content: space-between;
}

.page-about .about-cta__text {
  min-width: 0;
  flex: 1 1 20rem;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  font-weight: 750;
  letter-spacing: -0.01em;
  color: var(--c28-paper);
}

.page-about .about-cta__desc {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c28-text-dim);
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 960px) {
  .page-about .about-doc {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-doc-gap);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 6.25rem;
  }

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 4.2rem minmax(0, 1fr);
    gap: 0.5rem 1.4rem;
  }

  .page-about .about-note {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-team__item,
  .page-about .about-timeline__desc,
  .page-about .about-timeline__body {
    transition: none;
  }

  .page-about .about-team__item:hover,
  .page-about .about-team__item:focus-within,
  .page-about .about-index__link:hover {
    transform: none;
  }
}