.page-about {
  --about-hair: rgba(45, 226, 208, 0.3);
  --about-card: var(--ink-2);
  --about-card-alt: var(--ink-3);
  --about-shadow: 6px 6px 0 rgba(3, 16, 26, 0.62);
  position: relative;
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
  color: var(--cream);
  background:
    radial-gradient(760px 420px at 88% -6%, rgba(45, 226, 208, 0.1), transparent 70%),
    radial-gradient(620px 380px at -8% 26%, rgba(255, 107, 74, 0.075), transparent 72%);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(1.5rem, 4vw, 2.8rem) 0 clamp(1.6rem, 4vw, 2.6rem);
  border-bottom: 1.5px solid var(--line);
}

.page-about .about-hero-inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .about-hero-copy .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.page-about .about-hero-copy .eyebrow {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6.4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-hero-visual {
  border: 1.5px solid var(--line);
  background: rgba(3, 16, 26, 0.5);
  box-shadow: var(--about-shadow);
}

.page-about .about-console {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2.2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1.5px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.9rem 0.85rem;
  background: var(--about-card);
}

.page-about .about-stat .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.6vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--glow);
  line-height: 1.1;
}

.page-about .about-stat .stat-label {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(6, 24, 38, 0.94);
  border-bottom: 1.5px solid var(--line);
}

.page-about .about-index-bar-track {
  display: flex;
  gap: 0.4rem;
  padding: 0.55rem 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index-bar-track::-webkit-scrollbar {
  display: none;
}

.page-about .about-index-bar-track a {
  flex: 0 0 auto;
  padding: 0.38rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line);
  transition: color 180ms ease-out, border-color 180ms ease-out, background 180ms ease-out;
}

.page-about .about-index-bar-track a:hover,
.page-about .about-index-bar-track a:focus-visible {
  color: var(--glow);
  border-color: var(--cyan);
  background: rgba(45, 226, 208, 0.1);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: clamp(2.2rem, 5.5vw, 3.8rem) 0;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 3.6rem;
}

.page-about .about-section-head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: clamp(1.3rem, 3vw, 2rem);
}

.page-about .about-index {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(45, 226, 208, 0.55);
}

.page-about .about-section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-lede {
  margin: 0.7rem 0 0;
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 图版 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(1.2rem, 3vw, 1.9rem);
  border: 1.5px solid var(--line);
  background: var(--deep);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-figure figcaption {
  padding: 0.62rem 0.75rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.5rem;
  display: grid;
  gap: 0.75rem;
  background-image: linear-gradient(to bottom, var(--line-cyan), rgba(45, 226, 208, 0.02));
  background-size: 1.5px 100%;
  background-repeat: no-repeat;
  background-position: left top;
}

.page-about .about-timeline li {
  position: relative;
  padding: 0.85rem 0.95rem 0.95rem;
  background: var(--about-card);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 190ms ease-out, transform 190ms ease-out, box-shadow 190ms ease-out;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 1.25rem;
  width: 0.6rem;
  height: 0.6rem;
  margin-left: -0.3rem;
  border-radius: 50%;
  background: var(--ink);
  border: 1.5px solid var(--cyan);
  transition: background 190ms ease-out, box-shadow 190ms ease-out;
}

.page-about .about-timeline li:hover,
.page-about .about-timeline li:focus-within {
  border-color: var(--cyan);
  transform: translateX(3px);
  box-shadow: 4px 4px 0 rgba(3, 16, 26, 0.65);
}

.page-about .about-timeline li:hover::before,
.page-about .about-timeline li:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(45, 226, 208, 0.16);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-timeline h3 {
  margin: 0.28rem 0 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-timeline p {
  margin: 0.4rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-flow li {
  display: grid;
  gap: 0.3rem 1rem;
  padding: 0.9rem 1rem;
  background: linear-gradient(180deg, rgba(23, 59, 82, 0.9), rgba(12, 42, 64, 0.9));
  border: 1.5px solid var(--line);
  border-left: 3px solid var(--about-hair);
  transition: border-color 190ms ease-out, transform 190ms ease-out;
}

.page-about .about-flow li:hover {
  border-left-color: var(--coral);
  transform: translateX(3px);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--cyan);
  line-height: 1;
}

.page-about .flow-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .flow-body p {
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 0.9rem;
}

.page-about .team-card {
  position: relative;
  padding: 1.15rem 1rem 1.25rem;
  background: var(--about-card);
  border: 1.5px solid var(--line);
  box-shadow: 4px 4px 0 rgba(3, 16, 26, 0.45);
  transition: transform 200ms ease-out, border-color 200ms ease-out, box-shadow 200ms ease-out;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  left: -1.5px;
  top: -1.5px;
  width: 3.2rem;
  height: 3px;
  background: var(--cyan);
}

.page-about .team-card:nth-child(2)::before {
  background: var(--moss);
}

.page-about .team-card:nth-child(3)::before {
  background: var(--clay);
}

.page-about .team-card:hover,
.page-about .team-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 rgba(3, 16, 26, 0.7);
}

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

.page-about .team-role {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--glow);
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--line-cyan);
  background: rgba(45, 226, 208, 0.08);
}

.page-about .team-card h3 {
  margin: 0.65rem 0 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.42;
  color: var(--cream);
}

.page-about .team-card p {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.8rem);
}

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

.page-about .about-split-body > p {
  margin: 0 0 1.1rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .honor-card {
  position: relative;
  height: 210px;
  perspective: 1200px;
  cursor: pointer;
}

.page-about .honor-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 220ms ease-out;
}

.page-about .honor-card:hover .honor-inner,
.page-about .honor-card:focus-visible .honor-inner {
  transform: rotateY(180deg);
}

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

.page-about .honor-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem;
  border: 1.5px solid var(--line);
  backface-visibility: hidden;
  box-shadow: var(--about-shadow);
}

.page-about .honor-front {
  background:
    linear-gradient(150deg, rgba(201, 122, 90, 0.22), transparent 62%),
    var(--about-card-alt);
  justify-content: center;
}

.page-about .honor-front h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .honor-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--glow);
}

.page-about .honor-back {
  transform: rotateY(180deg);
  justify-content: center;
  background:
    linear-gradient(150deg, rgba(45, 226, 208, 0.16), transparent 64%),
    var(--about-card);
}

.page-about .honor-back p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .honor-card .chip {
  align-self: flex-start;
}

/* ---------- 更新与支持 ---------- */
.page-about .about-support {
  display: grid;
  gap: 0.9rem;
}

.page-about .support-card {
  padding: 1.15rem 1rem 1.3rem;
  background: var(--about-card);
  border: 1.5px solid var(--line);
  box-shadow: 4px 4px 0 rgba(3, 16, 26, 0.45);
}

.page-about .support-card--accent {
  background:
    linear-gradient(160deg, rgba(255, 107, 74, 0.14), transparent 58%),
    var(--about-card-alt);
  border-color: rgba(255, 107, 74, 0.4);
}

.page-about .support-card h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--cream);
}

.page-about .support-list {
  margin: 0 0 1.1rem;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
  list-style: square;
}

.page-about .support-list li {
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .support-list li::marker {
  color: var(--cyan);
}

.page-about .support-contact {
  margin: 0 0 0.9rem;
  display: grid;
  gap: 0.55rem;
}

.page-about .support-contact dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-about .support-contact dd {
  margin: 0.12rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--glow);
  word-break: break-word;
}

.page-about .support-note {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(1.4rem, 3vw, 2rem);
  padding: clamp(1.1rem, 3vw, 1.6rem);
  display: grid;
  gap: 1rem;
  border: 1.5px solid var(--line-cyan);
  background:
    linear-gradient(120deg, rgba(45, 226, 208, 0.12), transparent 55%),
    var(--about-card);
  box-shadow: var(--panel-shadow);
}

.page-about .about-cta-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-cta-copy p {
  margin: 0.55rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 1.05rem 1rem;
  }

  .page-about .about-split-body > p {
    font-size: 1rem;
  }
}

@media (min-width: 760px) {
  .page-about .about-flow li {
    grid-template-columns: 5rem minmax(0, 1fr);
    align-items: start;
    padding: 1rem 1.15rem;
  }

  .page-about .flow-num {
    font-size: 1.6rem;
    padding-top: 0.1rem;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 860px) {
  .page-about .about-index-bar-track a {
    font-size: 0.74rem;
    padding: 0.42rem 0.75rem;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-hero-visual {
    margin-top: 0.4rem;
  }

  .page-about .about-section-head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.2rem 1.5rem;
    align-items: start;
  }

  .page-about .about-index {
    font-size: 4rem;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline {
    padding-left: 1.8rem;
  }

  .page-about .about-timeline li::before {
    left: -1.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline li,
  .page-about .about-timeline li::before,
  .page-about .about-flow li,
  .page-about .team-card,
  .page-about .honor-inner,
  .page-about .about-index-bar-track a {
    transition: none;
  }

  .page-about .about-timeline li:hover,
  .page-about .about-timeline li:focus-within,
  .page-about .about-flow li:hover,
  .page-about .team-card:hover,
  .page-about .team-card:focus-visible {
    transform: none;
  }

  .page-about .honor-card:hover .honor-inner,
  .page-about .honor-card:focus-visible .honor-inner {
    transform: none;
  }
}