.page-about {
  --about-glow: rgba(0, 212, 255, 0.35);
  --about-accent-glow: rgba(255, 107, 0, 0.25);
  --about-node-size: 3.2rem;
  --about-connector-w: 2.5rem;
  --about-border-w: 3px;
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  background-color: var(--c-bg, #0D0D0D);
}

/* ── Breadcrumb ── */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem var(--gap, 1.5rem);
  max-width: var(--content-w, 1200px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.85rem;
  color: var(--c-text-muted, #B0B0B0);
}
.page-about .breadcrumb a {
  color: var(--c-primary, #00D4FF);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .breadcrumb a:hover {
  color: var(--c-accent, #FF6B00);
}
.page-about .breadcrumb-sep {
  color: var(--c-text-muted, #B0B0B0);
  font-size: 0.75rem;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--c-text, #FFFFFF);
  font-weight: 600;
}

/* ── Section 1: Brand Mission ── */
.page-about .brand-mission {
  position: relative;
  overflow: hidden;
  padding: 2rem var(--gap, 1.5rem) 3rem;
}
.page-about .brand-frame {
  position: relative;
  max-width: var(--content-w, 1200px);
  margin: 0 auto;
  width: 100%;
  border: var(--about-border-w) solid var(--c-border, rgba(0,212,255,0.4));
  border-radius: 0;
  padding: 2rem 1.5rem;
  background: var(--c-card, #1A1A2E);
  box-shadow: 0 0 40px var(--about-glow);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  box-sizing: border-box;
}
.page-about .brand-mission-inner {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  position: relative;
  z-index: 2;
}
.page-about .brand-headline {
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-style: italic;
  color: var(--c-text, #FFFFFF);
  margin: 0;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-about .brand-slogan {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: clamp(1rem, 2.4vw, 1.4rem);
  font-weight: 400;
  color: var(--c-text-muted, #B0B0B0);
  margin: 0 0 0.4rem;
  padding: 0 0 0.8rem;
  border-bottom: 1px solid var(--c-border, rgba(0,212,255,0.4));
}

/* ── Skill Tree ── */
.page-about .skill-tree {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.5rem 0;
}
.page-about .skill-node {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: rgba(0, 0, 0, 0.35);
  border: 2px solid var(--c-border, rgba(0,212,255,0.4));
  border-left: 4px solid var(--c-primary, #00D4FF);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: default;
}
.page-about .skill-node:hover {
  transform: scale(1.02);
  box-shadow: 0 0 24px var(--about-glow);
}
.page-about .skill-node-num {
  flex-shrink: 0;
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: var(--about-node-size);
  font-style: italic;
  line-height: 1;
  color: var(--c-primary, #00D4FF);
  opacity: 0.6;
  min-width: 2.6rem;
}
.page-about .skill-node-content {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.page-about .skill-node-title {
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-style: italic;
  color: var(--c-text, #FFFFFF);
  margin: 0;
  text-transform: uppercase;
}
.page-about .skill-node-desc {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.85rem;
  color: var(--c-text-muted, #B0B0B0);
  margin: 0;
  line-height: 1.4;
}
.page-about .skill-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0;
  color: var(--c-primary, #00D4FF);
  font-size: 1.2rem;
  line-height: 1;
  transform: rotate(90deg);
  transform-origin: center center;
  opacity: 0.6;
  width: 100%;
  height: 1.8rem;
}
.page-about .skill-connector svg {
  display: block;
  width: 24px;
  height: 24px;
}
.page-about .skill-cta-wrap {
  margin-top: 0.8rem;
}
.page-about .skill-cta-wrap .cta-btn {
  display: inline-block;
  padding: 0.7rem 2rem;
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: 1rem;
  font-style: italic;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  letter-spacing: 0.04em;
}
.page-about .skill-cta-wrap .cta-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 0 32px var(--about-accent-glow);
}

/* ── Brand Visual ── */
.page-about .brand-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}
.page-about .brand-badges-img {
  width: 100%;
  max-width: 480px;
  height: auto;
  object-fit: contain;
  border: 2px solid var(--c-border, rgba(0,212,255,0.4));
  background: rgba(0, 0, 0, 0.3);
  position: relative;
  z-index: 2;
}
.page-about .brand-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
}

/* ── Section 2: Features Showcase ── */
.page-about .features-showcase {
  padding: 3rem var(--gap, 1.5rem) 3.5rem;
  position: relative;
}
.page-about .features-heading {
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-style: italic;
  color: var(--c-text, #FFFFFF);
  margin: 0 0 1.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  position: relative;
  display: inline-block;
}
.page-about .features-heading::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60%;
  height: 3px;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
}
.page-about .features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap, 1.5rem);
}

.page-about .feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1.5rem;
  background: var(--c-card, #1A1A2E);
  border: 2px solid var(--c-border, rgba(0,212,255,0.4));
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 36px var(--about-glow);
}
.page-about .feature-card--large {
  grid-column: 1;
}
.page-about .feature-card-title {
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-style: italic;
  color: var(--c-primary, #00D4FF);
  margin: 0;
  text-transform: uppercase;
}
.page-about .feature-card-desc {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.9rem;
  color: var(--c-text-muted, #B0B0B0);
  margin: 0;
  line-height: 1.5;
}
.page-about .feature-card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-border, rgba(0,212,255,0.25));
  margin-top: 0.4rem;
}
.page-about .feature-link {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.85rem;
  color: var(--c-accent, #FF6B00);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: auto;
  transition: gap 0.2s;
}
.page-about .feature-link:hover {
  gap: 0.6rem;
  text-decoration: underline;
}
.page-about .feature-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 0;
  margin-top: auto;
  transition: transform 0.3s ease;
}
.page-about .feature-card:hover .feature-card-icon {
  transform: scale(1.08);
}

/* ── Section 3: Contact Info ── */
.page-about .contact-info {
  padding: 2rem var(--gap, 1.5rem) 3.5rem;
  position: relative;
}
.page-about .contact-info-inner {
  max-width: var(--content-w, 1200px);
  margin: 0 auto;
  width: 100%;
}
.page-about .contact-info-heading {
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  font-style: italic;
  color: var(--c-text, #FFFFFF);
  margin: 0 0 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-about .contact-info-card {
  position: relative;
  overflow: hidden;
  padding: 2rem 1.8rem;
  border: var(--about-border-w) solid var(--c-border, rgba(0,212,255,0.4));
  background: var(--c-card, #1A1A2E);
  box-shadow: 0 0 30px var(--about-glow);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
}
.page-about .contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  z-index: 2;
}
.page-about .contact-item {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.9rem;
  color: var(--c-text, #FFFFFF);
  margin: 0;
  line-height: 1.6;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.6rem;
}
.page-about .contact-label {
  font-weight: 600;
  color: var(--c-primary, #00D4FF);
  min-width: 4.2rem;
}
.page-about .contact-icp {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
  position: relative;
  z-index: 2;
  padding-top: 1rem;
  border-top: 1px solid var(--c-border, rgba(0,212,255,0.3));
}
.page-about .icp-text {
  font-family: var(--font-body, 'Noto Sans SC', Inter, system-ui, sans-serif);
  font-size: 0.8rem;
  color: var(--c-text-muted, #B0B0B0);
  margin: 0;
}
.page-about .contact-cta {
  display: inline-block;
  padding: 0.6rem 1.8rem;
  font-family: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  font-size: 0.9rem;
  font-style: italic;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .contact-cta:hover {
  transform: scale(1.04);
  box-shadow: 0 0 28px var(--about-accent-glow);
}
.page-about .contact-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.08;
  z-index: 0;
  pointer-events: none;
}

/* ── Reveal animation (progressive enhancement) ── */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.page-about [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Tablet & Desktop ── */
@media (min-width: 640px) {
  .page-about .brand-frame {
    grid-template-columns: 1fr 1fr;
    padding: 2.5rem 2rem;
    gap: 2.5rem;
  }
  .page-about .brand-visual {
    min-height: 300px;
  }
  .page-about .brand-badges-img {
    max-width: 100%;
  }
  .page-about .skill-tree {
    gap: 0.4rem;
  }
  .page-about .skill-connector {
    transform: rotate(0deg);
    height: auto;
    padding: 0.1rem 0;
    width: auto;
  }
  .page-about .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .feature-card--large {
    grid-column: 1 / -1;
  }
  .page-about .contact-info-card {
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    padding: 2.5rem 2.5rem;
  }
  .page-about .contact-icp {
    padding-top: 0;
    border-top: none;
    border-left: 1px solid var(--c-border, rgba(0,212,255,0.3));
    padding-left: 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .brand-mission {
    padding: 3rem var(--gap, 1.5rem) 4rem;
  }
  .page-about .brand-frame {
    padding: 3rem 3rem;
    gap: 3rem;
  }
  .page-about .features-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
  .page-about .feature-card--large {
    grid-column: 1;
    grid-row: 1 / 3;
  }
  .page-about .features-showcase {
    padding: 4rem var(--gap, 1.5rem) 4.5rem;
  }
  .page-about .contact-info {
    padding: 3rem var(--gap, 1.5rem) 4rem;
  }
  .page-about .contact-info-card {
    padding: 3rem 3.5rem;
  }
}

@media (min-width: 1200px) {
  .page-about .brand-frame {
    padding: 3.5rem 4rem;
  }
  .page-about .brand-headline {
    font-size: 4rem;
  }
  .page-about .skill-node {
    padding: 1.2rem 1.6rem;
  }
  .page-about .features-grid {
    gap: 1.8rem;
  }
  .page-about .contact-info-card {
    padding: 3.5rem 4rem;
  }
}