/* ===== Page About ===== */
.page-about {
  --about-tilt: rotate(-1.5deg);
  --about-soft-shadow: 6px 6px 0 rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--text);
}

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

.page-about img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

/* ==== Breadcrumbs ==== */
.page-about__crumb-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 1.25rem 1.5rem 0;
  display: flex;
  justify-content: flex-end;
}

.page-about__crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.875rem;
  color: var(--text-dim);
}

.page-about__crumbs-list a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.page-about__crumbs-list a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.page-about__crumbs-list li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--line);
  font-weight: 700;
}

.page-about__crumbs-list [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

/* ==== Hero ==== */
.page-about__hero {
  position: relative;
  min-height: clamp(500px, 88vh, 780px);
  display: flex;
  align-items: flex-end;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6vw), 0 100%);
  background: var(--ink-2);
  margin-bottom: 0;
}

.page-about__hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-about__hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.18;
}

.page-about__hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, rgba(11, 15, 25, 0.55) 0%, rgba(11, 15, 25, 0.78) 45%, rgba(18, 23, 41, 0.96) 100%);
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 136, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 191, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 1;
  pointer-events: none;
  mask-image: linear-gradient(135deg, transparent 15%, black 80%);
  -webkit-mask-image: linear-gradient(135deg, transparent 15%, black 80%);
}

.page-about__hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 7rem 1.5rem 6rem;
}

.page-about__hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 2px solid var(--line);
  background: rgba(26, 31, 46, 0.65);
  padding: 0.4rem 1rem;
  margin-bottom: 1.75rem;
}

.page-about__hero-kicker::before {
  content: "";
  width: 9px;
  height: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(0, 255, 136, 0.22);
}

.page-about__hero h1 {
  font-family: "Poppins Black", "Noto Sans SC", sans-serif;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 1.75rem;
  transform: var(--about-tilt) translateX(-4px);
  max-width: 15ch;
}

.page-about__hero-summary {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 54ch;
  margin: 0 0 2.5rem;
  padding-left: 1.25rem;
  border-left: 4px solid var(--accent);
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==== Section scaffolding ==== */
.page-about__section {
  position: relative;
  padding: 5rem 1.5rem;
  border-top: 2px solid var(--line);
  background: var(--ink);
}

.page-about__section--position {
  margin-top: -4vw;
  border-top: 4px solid var(--accent);
}

.page-about__section--milestone {
  background: linear-gradient(180deg, rgba(0, 255, 136, 0.035), transparent 45%), var(--ink);
}

.page-about__section--tech {
  background: linear-gradient(180deg, rgba(0, 191, 255, 0.035), transparent 45%), var(--ink);
}

.page-about__grid {
  max-width: var(--container-max);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
}

/* ==== Side column ==== */
.page-about__side {
  position: relative;
}

.page-about__side-index {
  display: block;
  font-family: "Poppins", sans-serif;
  font-weight: 900;
  font-size: clamp(3rem, 9vw, 5.2rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--accent);
  margin-bottom: 0.9rem;
  transform: rotate(-4deg);
  transform-origin: left center;
}

.page-about__side .section-kicker {
  margin-bottom: 0.6rem;
}

.page-about__side .section-title {
  font-family: "Poppins Black", "Noto Sans SC", sans-serif;
  font-size: clamp(1.8rem, 4.5vw, 3.1rem);
  font-weight: 900;
  line-height: 1;
  text-align: left;
  color: var(--text);
  margin: 0;
  transform: translateX(-3px);
}

.page-about__side-note {
  margin-top: 1.25rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent-2);
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ==== Content column ==== */
.page-about__content {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.page-about__content .lede {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 62ch;
  margin-bottom: 1.25rem;
}

.page-about__article-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 62ch;
  margin: 0;
}

/* ==== Metrics ==== */
.page-about__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.page-about__metrics .metric {
  border: 3px solid var(--line);
  background: var(--surface);
  padding: 1.4rem 1.1rem;
  box-shadow: var(--shadow);
  min-height: 108px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about__metrics .metric--blue {
  border-color: var(--accent-2);
  box-shadow: var(--shadow-blue);
}

.page-about__metrics .metric__value {
  font-family: "Poppins Black", sans-serif;
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  font-weight: 900;
  line-height: 1;
  color: var(--accent);
}

.page-about__metrics .metric--blue .metric__value {
  color: var(--accent-2);
}

.page-about__metrics .metric__label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==== Timeline ==== */
.page-about__timeline {
  position: relative;
  padding-left: 2.5rem;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 999px;
}

.page-about__timeline-item {
  position: relative;
  border: 2px solid transparent;
  padding: 0.9rem 1rem 0.9rem 1.1rem;
  margin-bottom: 1.4rem;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-2.5rem + 10px);
  top: 1.2rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink);
  border: 4px solid var(--accent);
  box-shadow: 0 0 0 6px rgba(0, 255, 136, 0.15);
  animation: page-about-pulse 2.6s ease-in-out infinite;
  z-index: 1;
}

.page-about__timeline-item:nth-child(2)::before,
.page-about__timeline-item:nth-child(4)::before {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 6px rgba(0, 191, 255, 0.15);
}

@keyframes page-about-pulse {
  0%, 100% {
    box-shadow: 0 0 0 6px rgba(0, 255, 136, 0.12);
  }
  50% {
    box-shadow: 0 0 0 13px rgba(0, 255, 136, 0.26);
  }
}

.page-about__timeline-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
}

.page-about__timeline-year {
  font-family: "Poppins", sans-serif;
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1;
  color: var(--accent);
}

.page-about__timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.page-about__timeline-desc {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-dim);
  margin: 0.55rem 0 0;
  max-width: 56ch;
}

.page-about__timeline-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.7rem;
}

.page-about__timeline-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
  border: 2px solid rgba(0, 255, 136, 0.35);
  background: rgba(0, 255, 136, 0.06);
  padding: 0.18rem 0.65rem;
  border-radius: 999px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about__timeline-img {
  margin: 2.5rem 0 0;
  border: 3px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--surface);
}

.page-about__timeline-img figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-top: 2px solid var(--line);
}

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

/* ==== Certifications ==== */
.page-about__cert {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
}

.page-about__iso {
  position: relative;
  border: 4px solid var(--accent);
  background: var(--surface);
  box-shadow: var(--shadow-accent);
  padding: 2rem 1.5rem 1.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.3rem;
}

.page-about__iso::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 2px dashed rgba(0, 255, 136, 0.35);
  pointer-events: none;
}

.page-about__iso svg {
  display: block;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.page-about__iso-type {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin: 0;
  position: relative;
  z-index: 1;
}

.page-about__iso strong {
  font-family: "Poppins", sans-serif;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.1;
  position: relative;
  z-index: 1;
}

.page-about__iso > span:last-child {
  font-size: 0.9rem;
  color: var(--text-dim);
  position: relative;
  z-index: 1;
}

.page-about__copyright {
  border: 3px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1.5rem 1.25rem;
}

.page-about__copyright-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-about__copyright-head strong {
  font-size: 1.35rem;
  font-weight: 900;
}

.page-about__copyright-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
}

.page-about__copyright-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border: 2px solid var(--line);
  background: var(--ink-2);
  padding: 0.55rem 0.7rem;
  font-size: 0.92rem;
  color: var(--text);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about__copyright-item span {
  font-family: "Poppins", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(0, 255, 136, 0.08);
  border: 2px solid var(--accent);
  padding: 0.12rem 0.4rem;
  min-width: 3.1em;
  text-align: center;
  flex-shrink: 0;
}

.page-about__cert-note {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 2px solid var(--line);
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ==== Tech architecture ==== */
.page-about__tech-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.page-about__tech-figure {
  border: 3px solid var(--accent-2);
  box-shadow: var(--shadow-blue);
  background: var(--surface);
  margin: 0;
}

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

.page-about__tech-figure figcaption {
  padding: 0.75rem 1rem;
  border-top: 2px solid var(--line);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.page-about__tech-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about__tech-feature {
  border: 2px solid var(--line);
  background: var(--surface);
  padding: 1.2rem 1rem 1.25rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about__tech-feature:hover {
  border-color: var(--accent);
  box-shadow: var(--about-soft-shadow);
}

.page-about__tech-num {
  display: block;
  font-family: "Poppins", sans-serif;
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--accent-2);
  margin-bottom: 0.3rem;
}

.page-about__tech-feature h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.page-about__tech-feature p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ==== Team & Ecosystem ==== */
.page-about__radar-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.25rem;
  align-items: center;
}

.page-about__radar {
  position: relative;
  width: min(360px, 88%);
  aspect-ratio: 1;
  margin-inline: auto;
  border-radius: 50%;
  border: 3px dashed var(--line);
  background:
    radial-gradient(circle, rgba(0, 255, 136, 0.08) 0%, transparent 58%),
    linear-gradient(0deg, transparent calc(50% - 1px), var(--line) 50%, transparent calc(50% + 1px)),
    linear-gradient(90deg, transparent calc(50% - 1px), var(--line) 50%, transparent calc(50% + 1px)),
    linear-gradient(45deg, transparent calc(50% - 1px), var(--line) 50%, transparent calc(50% + 1px)),
    linear-gradient(-45deg, transparent calc(50% - 1px), var(--line) 50%, transparent calc(50% + 1px));
}

.page-about__radar::before {
  content: "";
  position: absolute;
  inset: 28%;
  border-radius: 50%;
  border: 2px solid rgba(42, 48, 64, 0.85);
}

.page-about__radar-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--ink);
  border: 4px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Poppins Black", sans-serif;
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--accent);
  box-shadow: 0 0 0 10px rgba(0, 255, 136, 0.1);
  z-index: 2;
}

.page-about__radar-node {
  position: absolute;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  background: var(--surface);
  border: 3px solid var(--accent);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  box-shadow: var(--shadow);
  z-index: 2;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.page-about__radar-node--rd {
  top: 17%;
  left: 50%;
}

.page-about__radar-node--de {
  top: 50%;
  left: 83%;
}

.page-about__radar-node--pm {
  top: 83%;
  left: 50%;
}

.page-about__radar-node--op {
  top: 50%;
  left: 17%;
}

.page-about__radar-note {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about__radar-note p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-dim);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

.page-about__ecosystem {
  margin-top: 2.5rem;
  border: 3px solid var(--line);
  background: var(--ink-2);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
}

.page-about__ecosystem-title {
  font-size: 1.25rem;
  font-weight: 900;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.page-about__ecosystem p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ==== CTA ==== */
.page-about__cta {
  border-top: 2px solid var(--line);
  background-color: var(--accent);
  background-image: linear-gradient(135deg, rgba(0, 0, 0, 0.18) 25%, transparent 25%, transparent 50%, rgba(0, 0, 0, 0.18) 50%, rgba(0, 0, 0, 0.18) 75%, transparent 75%);
  background-size: 24px 24px;
  padding: 4.5rem 1.5rem;
}

.page-about__cta-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  text-align: left;
}

.page-about__cta-kicker {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
  color: rgba(11, 15, 25, 0.7);
}

.page-about__cta-inner h2 {
  font-family: "Poppins Black", "Noto Sans SC", sans-serif;
  font-size: clamp(1.9rem, 4.5vw, 3.4rem);
  font-weight: 900;
  line-height: 1;
  margin: 0 0 0.75rem;
  color: #0B0F19;
  max-width: 20ch;
}

.page-about__cta-inner > p {
  font-size: 1rem;
  color: rgba(11, 15, 25, 0.75);
  max-width: 52ch;
  margin: 0 0 2rem;
}

.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-about__cta-actions .btn--ghost {
  border-color: rgba(11, 15, 25, 0.5);
  color: #0B0F19;
}

/* ==== Desktop / hover adjustments ==== */
@media (min-width: 980px) {
  .page-about__grid {
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }

  .page-about__side {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    align-self: start;
    padding-right: 2rem;
    border-right: 3px solid var(--line);
  }

  .page-about__content {
    padding-top: 0.75rem;
  }

  .page-about__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-about__cert {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 2rem;
  }

  .page-about__copyright-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .page-about__tech-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 2rem;
  }

  .page-about__radar-wrap {
    grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
    gap: 2.5rem;
  }

  .page-about__section {
    padding: 6.5rem 2rem;
  }
}

@media (min-width: 980px) and (hover: hover) {
  .page-about__timeline-item:hover,
  .page-about__timeline-item:focus,
  .page-about__timeline-item:focus-within {
    background: rgba(0, 255, 136, 0.05);
    border-color: var(--accent);
    transform: translateX(8px);
  }

  .page-about__timeline-item:hover .page-about__timeline-tag {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.12);
  }

  .page-about__copyright-item:hover,
  .page-about__copyright-item:focus,
  .page-about__copyright-item:focus-within {
    border-color: var(--accent);
    background: var(--surface);
    transform: translateX(4px);
  }
}

@media (max-width: 420px) {
  .page-about__metrics {
    gap: 0.75rem;
  }

  .page-about__metrics .metric {
    min-height: 96px;
    padding: 1.1rem 0.85rem;
  }

  .page-about__timeline {
    padding-left: 2.1rem;
  }

  .page-about__timeline-item::before {
    left: calc(-2.1rem + 9px);
  }
}