.page-about {
  --about-line: rgba(141, 162, 184, 0.16);
  --about-line-soft: rgba(141, 162, 184, 0.09);
  background: var(--bg-abyss);
  color: var(--cloud-white);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .section {
  padding-block: clamp(36px, 6vw, 76px);
  position: relative;
}

.page-about .content-container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--electric);
  margin: 0 0 12px;
}

.page-about .mono-index {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.page-about .section-heading h2,
.page-about .about-hero h1 {
  font-weight: 800;
  letter-spacing: 0.045em;
  line-height: 1.16;
  margin: 0 0 14px;
}

.page-about .section-heading h2 {
  font-size: clamp(23px, 3.4vw, 34px);
  max-width: 22em;
}

.page-about .lede {
  color: var(--fog-blue);
  font-size: 16px;
  line-height: 1.8;
  max-width: 46em;
  margin: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--fog-blue);
}
.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(141, 162, 184, 0.5);
}
.page-about .breadcrumb-item a {
  color: var(--electric);
  text-decoration: none;
}
.page-about .breadcrumb-item a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 4vw, 44px) clamp(34px, 6vw, 68px);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 226, 230, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 226, 230, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  pointer-events: none;
}
.page-about .about-hero .content-container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

.page-about .about-hero h1 {
  font-size: clamp(29px, 5vw, 50px);
  line-height: 1.14;
  margin-bottom: 18px;
  max-width: 15em;
  background: linear-gradient(120deg, var(--cloud-white) 30%, var(--electric) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}
.page-about .hero-stat {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  background: linear-gradient(180deg, rgba(19, 43, 58, 0.6), rgba(13, 27, 46, 0.9));
}
.page-about .hero-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.8vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lava);
}
.page-about .hero-stat:nth-child(2) b {
  color: var(--electric);
}
.page-about .hero-stat:nth-child(3) b {
  color: var(--cloud-white);
}
.page-about .hero-stat span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--fog-blue);
}

.page-about .about-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}
.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 13px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-pill);
  background: rgba(19, 43, 58, 0.42);
  color: var(--cloud-white);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.page-about .about-index a .mono-index {
  font-size: 11px;
  color: var(--lava);
}
.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--electric);
  color: var(--electric);
  background: rgba(45, 226, 230, 0.08);
}

.page-about .media-frame {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--bg-panel);
  position: relative;
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero-media img {
  aspect-ratio: 16 / 9;
}
.page-about .media-caption {
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--fog-blue);
  border-top: 1px solid var(--about-line-soft);
  background: rgba(7, 17, 31, 0.7);
}

/* ---------- 纵向坐标轴 ---------- */
.page-about .about-axis-section {
  background: linear-gradient(180deg, var(--bg-abyss) 0%, rgba(13, 27, 46, 0.55) 50%, var(--bg-abyss) 100%);
}
.page-about .about-axis {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 42px);
}
.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--electric), rgba(45, 226, 230, 0.08));
  opacity: 0.5;
}
.page-about .axis-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: clamp(14px, 3vw, 32px);
  align-items: start;
}
.page-about .axis-marker {
  display: flex;
  justify-content: center;
  position: relative;
}
.page-about .axis-marker .mono-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 12px;
  color: var(--electric);
  background: var(--bg-panel);
  border: 1px solid var(--line-strong);
  box-shadow: 0 0 0 5px rgba(7, 17, 31, 0.95);
  z-index: 1;
}
.page-about .axis-step:nth-child(2) .axis-marker .mono-index {
  color: var(--lava);
  border-color: rgba(255, 107, 44, 0.42);
}
.page-about .axis-step:nth-child(3) .axis-marker .mono-index {
  color: var(--alert-yellow);
  border-color: rgba(255, 200, 87, 0.38);
}
.page-about .axis-step:nth-child(4) .axis-marker .mono-index {
  color: var(--feature-violet);
  border-color: rgba(108, 92, 231, 0.5);
}

.page-about .axis-body {
  background: rgba(13, 27, 46, 0.72);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2.4vw, 24px);
  border-left: 2px solid rgba(45, 226, 230, 0.45);
}
.page-about .axis-body h3 {
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: 0.03em;
  margin: 0 0 10px;
  color: var(--cloud-white);
}
.page-about .axis-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-blue);
}

/* ---------- 内容维护 ---------- */
.page-about .method-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}
.page-about .method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}
.page-about .method-card {
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--electric);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(19, 43, 58, 0.62), rgba(13, 27, 46, 0.92));
  padding: 18px 18px 20px;
}
.page-about .method-card:nth-child(2) {
  border-top-color: var(--lava);
}
.page-about .method-card:nth-child(3) {
  border-top-color: var(--feature-violet);
}
.page-about .method-card:nth-child(4) {
  border-top-color: var(--alert-yellow);
}
.page-about .method-card .mono-index {
  font-size: 11px;
  color: var(--fog-blue);
  letter-spacing: 0.16em;
}
.page-about .method-card h3 {
  font-size: 16px;
  margin: 8px 0 8px;
  letter-spacing: 0.02em;
}
.page-about .method-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog-blue);
}
.page-about .method-media {
  border-radius: var(--radius-lg);
}
.page-about .method-media img {
  aspect-ratio: 4 / 3;
}

/* ---------- 团队 ---------- */
.page-about .team-section {
  background: linear-gradient(180deg, rgba(13, 27, 46, 0.7), var(--bg-abyss));
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(24px, 3.5vw, 38px);
}
.page-about .team-badge {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: rgba(19, 43, 58, 0.55);
}
.page-about .team-count {
  font-size: clamp(38px, 6vw, 56px);
  line-height: 1;
  font-weight: 700;
  color: var(--signal-green);
  letter-spacing: 0;
}
.page-about .team-badge-text strong {
  display: block;
  font-size: 15px;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}
.page-about .team-badge-text span {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog-blue);
}
.page-about .team-dots {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(8, 12px);
  gap: 8px;
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}
.page-about .team-dots li {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--signal-green);
  opacity: 0.85;
  box-shadow: 0 0 10px rgba(124, 255, 107, 0.45);
}

.page-about .team-facts {
  display: grid;
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .fact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  background: var(--bg-panel);
}
.page-about .fact-key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--electric);
}
.page-about .fact-value {
  font-size: 14px;
  line-height: 1.7;
  color: var(--cloud-white);
}

/* ---------- 五格矩阵 ---------- */
.page-about .matrix-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}
.page-about .matrix-5 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}
.page-about .matrix-cell {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  background: linear-gradient(180deg, rgba(19, 43, 58, 0.6), rgba(7, 17, 31, 0.92));
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .matrix-cell:hover,
.page-about .matrix-cell:focus-within,
.page-about .matrix-cell:focus {
  border-color: var(--electric);
  transform: translateY(-3px);
  box-shadow: 0 16px 34px -22px rgba(45, 226, 230, 0.95);
  outline: none;
}
.page-about .matrix-id {
  display: inline-block;
  font-size: 11px;
  color: var(--lava);
  letter-spacing: 0.14em;
  margin-bottom: 10px;
}
.page-about .matrix-cell h3 {
  font-size: 15px;
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}
.page-about .matrix-cell p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog-blue);
}
.page-about .matrix-cell:last-child {
  border-color: rgba(255, 107, 44, 0.34);
}
.page-about .matrix-media img {
  aspect-ratio: 1 / 1;
}

/* ---------- 长期陪伴 ---------- */
.page-about .scene-list {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  padding: 0;
}
.page-about .scene-item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: rgba(13, 27, 46, 0.78);
}
.page-about .scene-dot {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--electric);
  box-shadow: 0 0 0 4px rgba(45, 226, 230, 0.12);
}
.page-about .scene-item:nth-child(2) .scene-dot {
  background: var(--alert-yellow);
  box-shadow: 0 0 0 4px rgba(255, 200, 87, 0.12);
}
.page-about .scene-item:nth-child(3) .scene-dot {
  background: var(--signal-green);
  box-shadow: 0 0 0 4px rgba(124, 255, 107, 0.12);
}
.page-about .scene-item:nth-child(4) .scene-dot {
  background: var(--feature-violet);
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.16);
}
.page-about .scene-item h3 {
  font-size: 16px;
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}
.page-about .scene-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog-blue);
}

/* ---------- 合作与联系 ---------- */
.page-about .cooperate-section {
  border-top: 1px solid var(--about-line-soft);
}
.page-about .cooperate-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.5vw, 40px);
  padding: clamp(20px, 3.5vw, 38px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, rgba(19, 43, 58, 0.72), rgba(7, 17, 31, 0.9));
}
.page-about .cooperate-copy h2 {
  font-size: clamp(22px, 3.2vw, 31px);
  letter-spacing: 0.04em;
  line-height: 1.22;
  margin: 0 0 14px;
}
.page-about .cooperate-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-blue);
  max-width: 40em;
}
.page-about .cooperate-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.page-about .cooperate-actions .button {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  color: var(--cloud-white);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.page-about .cooperate-actions .button-primary {
  background: var(--lava);
  border-color: var(--lava);
  color: #10161f;
  font-weight: 600;
}
.page-about .cooperate-actions .button:hover,
.page-about .cooperate-actions .button:focus-visible {
  border-color: var(--electric);
  color: var(--electric);
}
.page-about .cooperate-actions .button-primary:hover,
.page-about .cooperate-actions .button-primary:focus-visible {
  background: #ff8752;
  border-color: #ff8752;
  color: #10161f;
}

.page-about .cooperate-contact {
  display: grid;
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .contact-row {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  background: rgba(13, 27, 46, 0.94);
}
.page-about .contact-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fog-blue);
}
.page-about .contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--cloud-white);
  word-break: break-word;
}
.page-about .contact-note {
  margin: 0;
  padding: 14px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--fog-blue);
  background: rgba(19, 43, 58, 0.9);
}

.page-about .cooperate-links {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}
.page-about .cooperate-links a {
  display: block;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-line);
  background: rgba(13, 27, 46, 0.6);
  color: var(--cloud-white);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.page-about .cooperate-links a:hover,
.page-about .cooperate-links a:focus-visible {
  border-color: var(--electric);
  color: var(--electric);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .fact-row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
  .page-about .cooperate-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
  .page-about .method-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
  .page-about .method-media {
    position: sticky;
    top: 96px;
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
  .page-about .matrix-layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }
  .page-about .matrix-5 {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .scene-item:nth-child(odd) {
    margin-right: clamp(20px, 6vw, 72px);
  }
  .page-about .scene-item:nth-child(even) {
    margin-left: clamp(20px, 6vw, 72px);
  }
  .page-about .cooperate-panel {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 1140px) {
  .page-about .about-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .matrix-cell,
  .page-about .about-index a,
  .page-about .cooperate-actions .button,
  .page-about .cooperate-links a {
    transition: none;
  }
  .page-about .matrix-cell:hover,
  .page-about .matrix-cell:focus-within,
  .page-about .matrix-cell:focus {
    transform: none;
  }
}