.page-about {
  --about-font-display: 'Orbitron', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --about-font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --about-gold: #FFD700;
  --about-neon: #39FF14;
  --about-bg-main: #0B3D2E;
  --about-bg-dark: #0A0F0D;
  --about-panel: rgba(255, 255, 255, 0.06);
  --about-border-gold: rgba(255, 215, 0, 0.4);
  --about-muted: #B0C4B8;
  position: relative;
  overflow: hidden;
  background: var(--about-bg-dark);
  color: #FFFFFF;
  font-family: var(--about-font-body);
  line-height: 1.7;
}
.page-about .container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}
.page-about img {
  max-width: 100%;
  height: auto;
}
.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--about-font-display);
  margin: 0;
}

/* ===== HERO ===== */
.page-about__hero {
  position: relative;
  padding: 120px 0 72px;
  background: linear-gradient(150deg, var(--about-bg-dark) 0%, var(--about-bg-main) 58%, var(--about-bg-dark) 100%);
  overflow: hidden;
}
.page-about__hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,0.6), transparent 75%);
  mask-image: linear-gradient(to right, rgba(0,0,0,0.6), transparent 75%);
  z-index: 0;
}
.page-about__hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -18%;
  width: 68%;
  height: 130%;
  background: linear-gradient(135deg, transparent 0%, rgba(57, 255, 20, 0.1) 55%, rgba(255, 215, 0, 0.05) 100%);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  transform: skewX(-6deg);
  z-index: 0;
}
.page-about__hero::after {
  content: 'DATA · TIMELINE · SOLUTION';
  position: absolute;
  right: -26px;
  bottom: 16px;
  font-family: var(--about-font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.42em;
  color: rgba(255, 215, 0, 0.25);
  transform: rotate(-90deg) translateY(50%);
  transform-origin: right bottom;
  white-space: nowrap;
  z-index: 0;
}
.page-about__breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 32px;
  font-size: 13px;
  color: var(--about-muted);
}
.page-about__hero-layout {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.page-about__hero-copy {
  flex: 0 1 auto;
}
.page-about__hero-badge {
  display: inline-block;
  margin-bottom: 18px;
}
.page-about__hero h1 {
  font-size: clamp(32px, 6.4vw, 60px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}
.page-about__hero-title-line {
  display: block;
  color: var(--about-gold);
  margin-top: 6px;
}
.page-about__hero-lead {
  color: var(--about-muted);
  font-size: 16px;
  line-height: 1.8;
  max-width: 620px;
  margin: 0 0 36px;
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.page-about__hero-actions .btn-primary,
.page-about__hero-actions .btn-outline {
  min-width: 156px;
  text-align: center;
}
.page-about__hero-figure {
  position: relative;
  margin: 0;
}
.page-about__hero-figure::before {
  content: '';
  position: absolute;
  inset: -14px;
  background: linear-gradient(135deg, var(--about-gold), rgba(255, 215, 0, 0.05) 55%, rgba(57, 255, 20, 0.35));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
  opacity: 0.4;
  z-index: -1;
}
.page-about__hero-figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

/* ===== INTRO ===== */
.page-about__intro {
  position: relative;
  padding: 72px 0 56px;
  background: var(--about-bg-main);
}
.page-about__intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--about-neon), var(--about-gold) 45%, transparent 90%);
  opacity: 0.7;
}
.page-about__intro-grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.page-about__intro-text .section-subtitle,
.page-about__data-head .section-subtitle,
.page-about__credentials-copy .section-subtitle,
.page-about__philosophy-head .section-subtitle,
.page-about__timeline-head .section-subtitle {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.32em;
  color: var(--about-neon);
  text-transform: uppercase;
}
.page-about__intro-text h2,
.page-about__data-head h2,
.page-about__timeline-head h2,
.page-about__credentials-copy h2,
.page-about__philosophy-head h2 {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}
.page-about__intro-text > p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 16px;
}
.page-about__intro-quote {
  margin: 24px 0 0;
  padding: 16px 20px;
  border-left: 4px solid var(--about-gold);
  background: rgba(255, 255, 255, 0.04);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.page-about__intro-quote p {
  margin: 0;
  color: var(--about-gold);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
}
.page-about__intro-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about__intro-stat {
  position: relative;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(4px);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.45s;
}
.page-about__intro-stat:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}
.page-about__intro-stat--gold {
  border: 1px solid var(--about-border-gold);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(255, 255, 255, 0.04) 55%);
}
.page-about__stat-num,
.page-about__data-value {
  font-family: var(--about-font-display);
  font-weight: 900;
  line-height: 1;
  display: block;
}
.page-about__stat-num {
  font-size: 42px;
  color: var(--about-neon);
  margin-bottom: 8px;
}
.page-about__intro-stat--gold .page-about__stat-num {
  color: var(--about-gold);
}
.page-about__stat-suffix {
  font-size: 20px;
  margin-left: 2px;
  color: inherit;
}
.page-about__stat-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--about-muted);
  text-transform: uppercase;
}

/* ===== CORE DATA ===== */
.page-about__data {
  position: relative;
  padding: 72px 0 56px;
  background: var(--about-bg-dark);
}
.page-about__data::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 100%;
  background: linear-gradient(180deg, rgba(11, 61, 46, 0.4), rgba(255, 215, 0, 0.03));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about__data .container {
  position: relative;
  z-index: 1;
}
.page-about__data-head {
  margin-bottom: 36px;
}
.page-about__data-desc {
  color: var(--about-muted);
  font-size: 15px;
  margin: 0;
}
.page-about__data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about__data-card {
  position: relative;
  padding: 28px 24px 24px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.07);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), background 0.5s;
}
.page-about__data-card:hover {
  transform: translateY(-6px) scale(1.01);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(57, 255, 20, 0.04));
}
.page-about__data-card--offset {
  transform: translateY(10px);
}
.page-about__data-card--offset:hover {
  transform: translateY(4px) scale(1.01);
}
.page-about__data-card--neon {
  border-color: rgba(57, 255, 20, 0.3);
}
.page-about__data-card--neon::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--about-neon), transparent);
  opacity: 0.8;
}
.page-about__data-card--gold {
  border-color: var(--about-border-gold);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.12), rgba(255, 255, 255, 0.03));
}
.page-about__data-card--dark {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.04);
}
.page-about__data-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--about-muted);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.page-about__data-value {
  font-size: 56px;
  color: var(--about-gold);
  margin-bottom: 12px;
}
.page-about__data-card--neon .page-about__data-value {
  color: var(--about-neon);
}
.page-about__data-card--gold .page-about__data-value {
  color: var(--about-gold);
}
.page-about__data-unit {
  font-size: 22px;
  margin-left: 2px;
  color: inherit;
  opacity: 0.75;
}
.page-about__data-note {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
}
.page-about__data-footnote {
  margin: 32px 0 0;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--about-muted);
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--about-neon);
  line-height: 1.7;
}

/* ===== TIMELINE ===== */
.page-about__milestones {
  position: relative;
  padding: 72px 0 60px;
  background: var(--about-bg-main);
}
.page-about__timeline-head {
  margin-bottom: 20px;
}
.page-about__timeline-desc {
  color: var(--about-muted);
  font-size: 15px;
  margin: 0 0 24px;
}
.page-about__timeline-figure {
  margin: 0 0 40px;
}
.page-about__timeline-img {
  display: block;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.page-about__timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about__timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 3px;
  background: linear-gradient(180deg, var(--about-neon) 0%, var(--about-gold) 40%, rgba(255, 255, 255, 0.12) 90%);
  border-radius: 2px;
}
.page-about__timeline-item {
  position: relative;
  margin-bottom: 28px;
  padding-left: 44px;
}
.page-about__timeline-item:last-child {
  margin-bottom: 0;
}
.page-about__timeline-item::before {
  content: '';
  position: absolute;
  top: 22px;
  left: 6px;
  width: 16px;
  height: 16px;
  background: var(--about-bg-dark);
  border: 3px solid var(--about-neon);
  border-radius: 50%;
  z-index: 1;
  box-sizing: border-box;
}
.page-about__timeline-item:nth-child(even)::before {
  border-color: var(--about-gold);
}
.page-about__timeline-year {
  font-family: var(--about-font-display);
  font-size: 24px;
  font-weight: 900;
  color: var(--about-gold);
  line-height: 1.4;
  margin-bottom: 8px;
}
.page-about__timeline-card {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.06);
}
.page-about__timeline-card h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
  color: #FFFFFF;
}
.page-about__timeline-card p {
  font-size: 14px;
  color: var(--about-muted);
  margin: 0;
  line-height: 1.75;
}

/* ===== CREDENTIALS ===== */
.page-about__credentials {
  position: relative;
  padding: 72px 0 60px;
  background: var(--about-bg-dark);
}
.page-about__credentials-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.page-about__credentials-lead {
  color: rgba(255, 255, 255, 0.88);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.page-about__credentials-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about__credentials-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}
.page-about__credentials-list .badge--neon,
.page-about__credentials-list .badge--gold {
  flex: 0 0 auto;
  padding: 4px 10px;
  font-family: var(--about-font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  border-radius: 2px;
}
.page-about__credentials-note {
  font-size: 14px;
  color: var(--about-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 18px;
  margin: 0;
  line-height: 1.8;
}
.page-about__credentials-media {
  margin: 0;
}
.page-about__credentials-img {
  display: block;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ===== PHILOSOPHY ===== */
.page-about__philosophy {
  position: relative;
  padding: 72px 0 60px;
  background: linear-gradient(180deg, var(--about-bg-main) 0%, var(--about-bg-dark) 100%);
}
.page-about__philosophy-head {
  margin-bottom: 40px;
}
.page-about__philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about__philosophy-item {
  position: relative;
  padding: 32px 24px 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: background 0.45s, border-color 0.45s, transform 0.45s;
}
.page-about__philosophy-item:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
}
.page-about__philosophy-item--neon {
  border-left: 4px solid var(--about-neon);
}
.page-about__philosophy-item--gold {
  border-left: 4px solid var(--about-gold);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.08), rgba(255, 255, 255, 0.04));
}
.page-about__philosophy-num {
  display: block;
  font-family: var(--about-font-display);
  font-size: 40px;
  font-weight: 900;
  line-height: 1;
  color: var(--about-neon);
  margin-bottom: 18px;
  opacity: 0.85;
}
.page-about__philosophy-item--gold .page-about__philosophy-num {
  color: var(--about-gold);
}
.page-about__philosophy-item h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}
.page-about__philosophy-item p {
  font-size: 14px;
  color: var(--about-muted);
  margin: 0;
  line-height: 1.75;
}

/* ===== CTA ===== */
.page-about__cta {
  padding: 60px 0 72px;
  background: var(--about-bg-dark);
}
.page-about__cta-card {
  position: relative;
  padding: 36px 28px;
  background: linear-gradient(135deg, rgba(11, 61, 46, 0.9), rgba(10, 15, 13, 0.9));
  border: 1px solid var(--about-border-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  overflow: hidden;
}
.page-about__cta-card::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -12%;
  width: 45%;
  height: 220%;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.14), transparent 70%);
  pointer-events: none;
}
.page-about__cta-card h2 {
  position: relative;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}
.page-about__cta-card p {
  position: relative;
  color: var(--about-muted);
  font-size: 15px;
  margin: 0 0 28px;
}
.page-about__cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about__cta-actions .btn-primary,
.page-about__cta-actions .btn-outline,
.page-about__cta-actions .btn-gold {
  min-width: 148px;
  text-align: center;
}

/* ===== REVEAL ANIMATION (progressive enhancement) ===== */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: no-preference) {
  .page-about.js [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay, 0ms);
  }
  .page-about.js [data-reveal="left"] {
    transform: translateX(-32px);
  }
  .page-about.js [data-reveal="right"] {
    transform: translateX(32px);
  }
  .page-about.js [data-reveal].revealed {
    opacity: 1;
    transform: none;
  }
}

/* ===== RESPONSIVE ===== */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 136px 0 88px;
  }
  .page-about__hero-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 48px;
  }
  .page-about__intro-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 56px;
    align-items: start;
  }
  .page-about__data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .page-about__data-card--offset {
    transform: translateY(24px);
  }
  .page-about__data-card--offset:hover {
    transform: translateY(18px) scale(1.01);
  }
  .page-about__philosophy-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .page-about__credentials-list li {
    justify-content: flex-start;
  }
  .page-about__cta-card {
    padding: 48px 40px;
  }
}
@media (min-width: 1024px) {
  .page-about__hero h1 {
    font-size: 62px;
  }
  .page-about__data {
    padding: 88px 0 64px;
  }
  .page-about__data-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about__timeline-head {
    margin-bottom: 28px;
  }
  .page-about__timeline-figure {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 32px;
    margin-bottom: 56px;
  }
  .page-about__timeline-figure .page-about__timeline-img {
    grid-column: 2;
    grid-row: 1;
  }
  .page-about__timeline-head {
    position: relative;
    z-index: 1;
    grid-column: 1;
    grid-row: 1;
  }
  .page-about__timeline-head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
  }
  .page-about__timeline-head .section-subtitle,
  .page-about__timeline-head h2,
  .page-about__timeline-desc {
    grid-column: 1;
  }
  .page-about__timeline-head .section-subtitle {
    margin-bottom: 0;
  }
  .page-about__timeline-head h2 {
    margin: 0;
  }
  .page-about__timeline-head .page-about__timeline-desc {
    grid-column: 1;
  }
  .page-about__timeline-figure {
    display: none;
  }
  .page-about__timeline {
    position: relative;
    padding-top: 8px;
  }
  .page-about__timeline::before {
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
  }
  .page-about__timeline-item {
    width: 50%;
    padding-left: 0;
    margin-bottom: 40px;
  }
  .page-about__timeline-item:nth-child(odd) {
    padding-right: 56px;
    text-align: right;
  }
  .page-about__timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 56px;
    text-align: left;
  }
  .page-about__timeline-item::before {
    top: 30px;
    left: auto;
    right: -8px;
  }
  .page-about__timeline-item:nth-child(even)::before {
    left: -8px;
    right: auto;
  }
  .page-about__timeline-card {
    padding: 24px 26px;
  }
  .page-about__timeline-card h3 {
    font-size: 18px;
  }
  .page-about__credentials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }
  .page-about__philosophy-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about__philosophy-item {
    padding: 36px 24px 32px;
  }
  .page-about__cta {
    padding: 64px 0 80px;
  }
}
@media (min-width: 1240px) {
  .page-about__hero-layout {
    gap: 64px;
  }
  .page-about__milestones,
  .page-about__credentials,
  .page-about__philosophy {
    padding: 96px 0 80px;
  }
}

.page-about {
  --reveal-delay: 0.3s;
}