.page-about {
  --about-pad: 20px;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .shell {
  box-sizing: border-box;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding: 20px 0 40px;
  background:
    radial-gradient(120% 70% at 92% 0%, rgba(0, 229, 195, 0.16), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px var(--about-pad) 24px;
  background: rgba(7, 28, 24, 0.62);
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 42px;
  height: 42px;
  border: 2px solid var(--cyan);
  pointer-events: none;
  opacity: 0.65;
}

.page-about .about-hero__frame::before {
  top: 12px;
  left: 12px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: 14px;
}

.page-about .about-hero__frame::after {
  right: 12px;
  bottom: 12px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: 14px;
}

.page-about .about-hero__vertical {
  display: none;
  position: absolute;
  top: 32px;
  right: 18px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan-soft);
  opacity: 0.75;
}

.page-about .about-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-about .about-hero__brand {
  display: block;
  font-size: clamp(34px, 10vw, 70px);
  color: var(--cyan);
}

.page-about .about-hero__line {
  display: block;
  font-size: clamp(24px, 6.5vw, 44px);
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .about-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stat {
  padding: 16px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(13, 48, 41, 0.55);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-hero__stat:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-2px);
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-hero__stat-plus {
  font-size: 15px;
  margin-left: 2px;
  color: var(--cyan-soft);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ============ 章节索引条 ============ */
.page-about .about-index {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: block;
  white-space: nowrap;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link:hover {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

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

/* ============ 通用章节 ============ */
.page-about .about-origin,
.page-about .about-stages-section,
.page-about .about-team,
.page-about .about-column,
.page-about .about-mobile,
.page-about .about-forward {
  padding: 48px 0;
}

.page-about .about-origin {
  background: var(--ink);
}

.page-about .about-stages-section {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
}

.page-about .about-team {
  background: var(--ink);
}

.page-about .about-column {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
}

.page-about .about-mobile {
  background: var(--ink);
}

.page-about .about-forward {
  background: var(--ink-2);
  padding-bottom: 64px;
}

.page-about .section-head {
  margin-bottom: 28px;
}

/* ============ 品牌起点 ============ */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-origin__text .prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .about-origin__text .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.page-about .about-origin__aside .plate {
  background: rgba(13, 48, 41, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

/* ============ 发展节点时间轴 ============ */
.page-about .about-stages__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-stages__figure {
  margin: 0;
}

.page-about .about-stages__figure img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: center;
}

.page-about .about-stages {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 18%, var(--line) 100%);
}

.page-about .about-stage {
  position: relative;
  padding: 0 0 30px;
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 9px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 195, 0.18);
}

.page-about .about-stage__tag {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(0, 229, 195, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-stage__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-stage__desc {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.8;
}

.page-about .about-stage__add {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--cyan-soft);
}

/* ============ 广东团队 ============ */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-team__prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .about-role {
  margin: 0 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(13, 48, 41, 0.5);
  transition: border-color 0.25s var(--ease);
}

.page-about .about-role:last-of-type {
  margin-bottom: 0;
}

.page-about .about-role:hover,
.page-about .about-role[open] {
  border-color: var(--cyan-dim);
}

.page-about .about-role__sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  list-style: none;
}

.page-about .about-role__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-role__sum::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 0.25s var(--ease);
}

.page-about .about-role[open] .about-role__sum::after {
  transform: rotate(45deg);
}

.page-about .about-role__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

.page-about .about-role__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-team__figure {
  margin: 0;
}

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

.page-about .about-team__partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__partner {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(13, 48, 41, 0.45);
}

.page-about .about-team__partner-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__partner-label {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

/* ============ 专家专栏 ============ */
.page-about .about-column__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-column__lead p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .about-column__lead p:last-child {
  margin-bottom: 0;
}

.page-about .about-column__zones {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-zone {
  position: relative;
  padding: 18px 18px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(13, 48, 41, 0.5);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-zone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-dim) 100%);
  opacity: 0.7;
}

.page-about .about-zone:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-2px);
}

.page-about .about-zone__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-soft);
}

.page-about .about-zone__name {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-zone__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-column__figure {
  margin: 32px 0 0;
}

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

/* ============ 移动端优先 ============ */
.page-about .about-mobile__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-mobile__col {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(150deg, rgba(0, 229, 195, 0.08) 0%, transparent 62%),
    rgba(13, 48, 41, 0.45);
  transition: border-color 0.25s var(--ease);
}

.page-about .about-mobile__col:hover {
  border-color: var(--cyan-dim);
}

.page-about .about-mobile__sub {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-mobile__col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.82;
}

/* ============ 下一步 ============ */
.page-about .about-forward__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-forward__link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 28, 24, 0.6);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-forward__link:hover {
  border-color: var(--cyan);
  background: rgba(0, 229, 195, 0.08);
  transform: translateY(-2px);
}

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

.page-about .about-forward__kicker {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-forward__title {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .about-forward__go {
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: nowrap;
  color: var(--cyan-soft);
}

/* ============ 断点 ============ */
@media (min-width: 600px) {
  .page-about {
    --about-pad: 32px;
  }

  .page-about .about-hero__frame {
    padding: 36px var(--about-pad) 32px;
  }

  .page-about .about-hero__vertical {
    display: block;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

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

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

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

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

  .page-about .about-team__partner {
    flex-direction: column;
    gap: 8px;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-stages__grid {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-stages__figure {
    position: sticky;
    top: 96px;
  }

  .page-about .about-stages__figure img {
    max-height: none;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-column__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-column__lead {
    position: sticky;
    top: 96px;
  }

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

  .page-about .about-forward__item:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero {
    padding: 28px 0 52px;
  }

  .page-about .about-origin,
  .page-about .about-stages-section,
  .page-about .about-team,
  .page-about .about-column,
  .page-about .about-mobile,
  .page-about .about-forward {
    padding: 68px 0;
  }

  .page-about .about-stages__grid {
    grid-template-columns: 320px minmax(0, 1fr);
  }

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

  .page-about .about-forward__item:first-child {
    grid-column: span 2;
  }
}
</main>