.page-about {
  --about-accent: #3DFF7E;
  --about-accent-dark: #2BCF66;
  --about-mid: #1F3A7A;
  --about-bright: #3E67B8;
  --about-deep: #0A1128;
  --about-text: #F0F4FF;
  --about-text-sub: rgba(240, 244, 255, 0.7);
  --about-line: rgba(61, 255, 126, 0.4);
  --about-neutral: #1C2E4A;
  --about-neutral-light: #2C4A72;
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--about-text);
  background: var(--about-deep);
  line-height: 1.7;
  overflow-x: hidden;
}

.about-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
  position: relative;
}

/* ===== Hero ===== */
.about-hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-hero-copy {
  position: relative;
  z-index: 2;
}

.about-kicker {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-accent);
  font-weight: 600;
  margin: 0 0 1rem;
}

.about-title {
  font-family: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1.75rem;
  max-width: 12em;
}

.about-lead {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  color: var(--about-text-sub);
  max-width: 42rem;
  margin: 0 0 1rem;
  line-height: 1.8;
}

.about-hero-note {
  font-size: 0.95rem;
  color: var(--about-accent);
  border-left: 2px solid var(--about-line);
  padding-left: 1rem;
  margin: 0 0 2rem;
}

.about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.about-hero-index {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.25rem 1.5rem;
  background: rgba(31, 58, 122, 0.35);
  border: 1px solid rgba(62, 103, 184, 0.4);
  border-radius: 4px;
  backdrop-filter: blur(8px);
  max-width: 320px;
}

.about-index-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--about-text-sub);
  margin-bottom: 0.5rem;
}

.about-index-link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  color: var(--about-text);
  text-decoration: none;
  font-size: 1rem;
  padding: 0.15rem 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.about-index-link i {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--about-accent);
  width: 1.6em;
  flex: none;
}

.about-index-link:hover {
  color: var(--about-accent);
  padding-left: 0.25rem;
}

.about-hero-geometry {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  max-width: 500px;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.about-hero-svg {
  width: 100%;
  height: auto;
  opacity: 0.7;
}

/* ===== Breadcrumbs ===== */
.about-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--about-text-sub);
  padding: 0.5rem 0 2.5rem;
  border-bottom: 1px solid rgba(62, 103, 184, 0.3);
  margin-bottom: 2.5rem;
}

.about-breadcrumbs a {
  color: var(--about-text-sub);
  text-decoration: none;
  transition: color 0.2s ease;
}

.about-breadcrumbs a:hover {
  color: var(--about-accent);
}

/* ===== Sections ===== */
.about-section {
  margin-bottom: clamp(4rem, 8vw, 7rem);
  scroll-margin-top: 2rem;
}

.about-section-head {
  margin-bottom: 2rem;
}

.about-section-title {
  font-family: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

.about-section-summary {
  color: var(--about-text-sub);
  max-width: 38rem;
  font-size: 1rem;
  margin: 0;
}

/* ===== Background ===== */
.about-background-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.glass-panel {
  background: linear-gradient(135deg, rgba(31, 58, 122, 0.18) 0%, rgba(44, 74, 114, 0.12) 100%);
  border: 1px solid rgba(62, 103, 184, 0.35);
  backdrop-filter: blur(10px);
  border-radius: 4px;
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.about-bg-intro {
  position: relative;
  overflow: hidden;
}

.about-bg-intro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--about-accent), transparent 60%);
}

.about-bg-text {
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0 0 1rem;
  max-width: 52rem;
}

.about-bg-text:last-child {
  margin-bottom: 0;
}

.about-bg-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(62, 103, 184, 0.25);
  border: 1px solid rgba(62, 103, 184, 0.25);
  border-radius: 4px;
  overflow: hidden;
}

.about-stat-item {
  background: rgba(10, 17, 40, 0.85);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.about-stat-item .metric-number {
  font-family: "Archivo Black", "Noto Sans SC", sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: var(--about-text);
  line-height: 1.1;
}

.about-stat-item .metric-number em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--about-accent);
  margin-left: 0.15em;
}

.about-stat-item .metric-label {
  font-size: 0.8rem;
  color: var(--about-text-sub);
}

.about-bg-mission {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding: 1.5rem;
  border: 1px dashed rgba(61, 255, 126, 0.3);
  border-radius: 4px;
}

.about-mission-line {
  flex: none;
  width: 3px;
  height: 3rem;
  background: linear-gradient(to bottom, var(--about-accent), transparent);
}

.about-mission-text {
  font-size: 1rem;
  color: var(--about-text);
  margin: 0;
}

/* ===== Milestones ===== */
.about-milestone-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.about-timeline-wrap {
  position: relative;
  padding: 1rem 0;
}

.about-timeline-svg {
  width: 100%;
  height: auto;
  display: block;
}

.about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  position: relative;
}

.about-timeline-list::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-accent), var(--about-bright));
  opacity: 0.5;
}

.about-timeline-item {
  position: relative;
  padding-left: 2.5rem;
  transition: background 0.2s ease;
}

.about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--about-deep);
  border: 2px solid var(--about-accent);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.about-timeline-item:hover::before {
  background: var(--about-accent);
  box-shadow: 0 0 0 6px rgba(61, 255, 126, 0.15);
}

.about-timeline-item:hover .about-tl-desc {
  color: var(--about-text);
}

.about-tl-phase {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--about-accent);
  margin-bottom: 0.2rem;
}

.about-tl-title {
  display: block;
  font-family: "Archivo Black", "Noto Sans SC", sans-serif;
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.about-tl-desc {
  font-size: 0.9rem;
  color: var(--about-text-sub);
  margin: 0;
  transition: color 0.2s ease;
}

.about-milestone-media {
  margin-top: 1rem;
}

.media-frame {
  border: 1px solid rgba(62, 103, 184, 0.35);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  background: var(--about-neutral);
  margin: 0;
}

.media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.media-frame.is-wide {
  width: 100%;
}

.media-frame.is-tall img {
  object-fit: cover;
}

.media-frame-caption {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--about-text-sub);
  border-top: 1px solid rgba(62, 103, 184, 0.2);
  background: rgba(10, 17, 40, 0.4);
}

/* ===== Capability ===== */
.about-capability-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-capability-figure {
  max-width: 560px;
}

.about-capability-figure img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.about-capability-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.about-cap-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(62, 103, 184, 0.25);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.about-cap-item:hover {
  border-bottom-color: var(--about-line);
  transform: translateX(4px);
}

.about-cap-index {
  font-family: "Archivo Black", "Noto Sans SC", sans-serif;
  font-size: 1rem;
  color: var(--about-accent);
  padding-top: 0.15rem;
}

.about-cap-title {
  font-weight: 600;
  font-size: 1.05rem;
  display: inline-block;
  margin-bottom: 0.35rem;
  background: linear-gradient(90deg, var(--about-accent), var(--about-accent)) no-repeat left bottom / 0 2px;
  transition: background-size 0.25s ease;
}

.about-cap-item:hover .about-cap-title {
  background-size: 100% 2px;
}

.about-cap-desc {
  font-size: 0.9rem;
  color: var(--about-text-sub);
  margin: 0;
  line-height: 1.6;
}

.about-capability-strip {
  margin-top: 1.5rem;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 1rem 1.25rem;
  background: rgba(31, 58, 122, 0.2);
  border: 1px solid rgba(62, 103, 184, 0.3);
  border-radius: 4px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--about-text);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--about-accent);
  box-shadow: 0 0 8px rgba(61, 255, 126, 0.5);
}

/* ===== Team ===== */
.about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.about-team-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text);
  max-width: 52rem;
  margin: 0 0 1.25rem;
}

.about-team-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.about-team-list li {
  display: flex;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: var(--about-text-sub);
  line-height: 1.5;
}

.about-team-list li span {
  flex: none;
  color: var(--about-accent);
  font-weight: 600;
  min-width: 3.4em;
}

.about-team-note {
  font-size: 0.88rem;
  color: var(--about-text-sub);
  padding: 0.85rem 1rem;
  background: rgba(31, 58, 122, 0.15);
  border-left: 2px solid var(--about-line);
  margin: 0;
}

.about-team-figure img {
  object-fit: cover;
}

.about-team-map {
  margin-top: 0;
  padding: 1.5rem;
  background: rgba(10, 17, 40, 0.55);
  border: 1px solid rgba(62, 103, 184, 0.3);
  border-radius: 4px;
}

.about-team-svg {
  width: 100%;
  height: auto;
  display: block;
}

.about-map-note {
  font-size: 0.82rem;
  color: var(--about-text-sub);
  text-align: center;
  margin: 0.75rem 0 0;
}

/* ===== Honors ===== */
.about-honors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.about-honor-card {
  background: linear-gradient(145deg, rgba(31, 58, 122, 0.15), rgba(28, 46, 74, 0.35));
  border: 1px solid rgba(62, 103, 184, 0.35);
  border-radius: 4px;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.about-honor-card:hover {
  border-color: var(--about-line);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.about-honor-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
}

.about-honor-icon svg {
  display: block;
}

.about-honor-title {
  font-family: "Archivo Black", "Noto Sans SC", sans-serif;
  font-size: 1.12rem;
  line-height: 1.35;
  margin-bottom: -0.4rem;
}

.about-honor-desc {
  font-size: 0.9rem;
  color: var(--about-text-sub);
  margin: 0;
  line-height: 1.65;
}

.about-honor-card .tag {
  align-self: flex-start;
  display: inline-block;
  padding: 0.2rem 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--about-accent);
  background: rgba(61, 255, 126, 0.08);
  border: 1px solid rgba(61, 255, 126, 0.3);
  border-radius: 2px;
}

.about-honors-foot {
  margin-top: 2rem;
  padding: 1.25rem;
  border-top: 1px solid rgba(62, 103, 184, 0.3);
  font-size: 0.9rem;
  color: var(--about-text-sub);
}

.about-honors-foot a {
  color: var(--about-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.about-honors-foot a:hover {
  border-bottom-color: var(--about-accent);
}

/* ===== Backlink ===== */
.about-backlink {
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.about-backlink-card {
  background: linear-gradient(135deg, rgba(31, 58, 122, 0.3), rgba(10, 17, 40, 0.5));
  border: 1px solid rgba(61, 255, 126, 0.25);
  border-radius: 4px;
  padding: 1.75rem 1.5rem;
}

.about-backlink-label {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--about-accent);
  margin: 0 0 0.75rem;
}

.about-backlink-link {
  display: block;
  color: var(--about-text);
  text-decoration: none;
  font-size: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(62, 103, 184, 0.2);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.about-backlink-link:last-child {
  border-bottom: none;
}

.about-backlink-link:hover {
  color: var(--about-accent);
  padding-left: 0.5rem;
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
  .about-hero {
    grid-template-columns: 1.4fr 0.7fr;
    align-items: start;
  }

  .about-hero-index {
    margin-top: 4.5rem;
  }

  .about-background-grid {
    grid-template-columns: 1.35fr 0.65fr;
    align-items: stretch;
  }

  .about-bg-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-milestone-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .about-capability-layout {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
  }

  .about-team-layout {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
  }

  .about-honors-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .about-hero-copy {
    padding-right: 8vw;
  }

  .about-honors-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .about-bg-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-bg-mission {
    flex-direction: column;
    gap: 0.75rem;
  }

  .about-mission-line {
    width: 3rem;
    height: 3px;
  }

  .about-capability-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .about-hero-cta .btn {
    text-align: center;
  }

  .about-team-map {
    padding: 0.75rem;
  }

  .about-map-note {
    font-size: 0.72rem;
  }
}