/* Neural Gate — Orbital Command UI */
:root {
  --void: #060a12;
  --void-2: #0b1220;
  --panel: color-mix(in oklab, #0e1a2e 86%, transparent);
  --ice: #5eead4;
  --ice-dim: #2dd4bf;
  --amber: #f5b942;
  --amber-hot: #ffc857;
  --steel: #9fb3c8;
  --text: #e8eef6;
  --muted: #8a9bb0;
  --danger: #ff6b6b;
  --font-display: "Orbitron", sans-serif;
  --font-body: "Rajdhani", "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius: 2px;
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  color: var(--text);
  background: radial-gradient(1200px 700px at 70% -10%, #12243f 0%, transparent 55%),
              radial-gradient(900px 500px at 10% 20%, #1a1408 0%, transparent 50%),
              var(--void);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 500;
  line-height: 1.65;
  overflow-x: hidden;
}

::selection {
  background: color-mix(in oklab, var(--amber) 45%, transparent);
  color: #0a0c10;
}

.starfield {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}

.bg-mesh {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(94, 234, 212, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 234, 212, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  animation: meshDrift 40s linear infinite;
}

@keyframes meshDrift {
  from { background-position: 0 0; }
  to { background-position: 64px 64px; }
}

.bg-vignette {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.55) 100%);
}

.scan-line {
  position: fixed; left: 0; width: 100%; height: 120px; z-index: 3;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(94, 234, 212, 0.05), transparent);
  animation: scan 7s linear infinite;
  mix-blend-mode: screen;
}

@keyframes scan {
  0% { top: -20%; }
  100% { top: 110%; }
}

.hud-frame { position: fixed; inset: 12px; z-index: 4; pointer-events: none; }
.hud-corner {
  position: absolute; width: 28px; height: 28px;
  border: 2px solid color-mix(in oklab, var(--amber) 55%, transparent);
}
.hud-corner.tl { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.hud-corner.tr { top: 0; right: 0; border-left: 0; border-bottom: 0; }
.hud-corner.bl { bottom: 0; left: 0; border-right: 0; border-top: 0; }
.hud-corner.br { bottom: 0; right: 0; border-left: 0; border-top: 0; }

.top-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem clamp(1rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, rgba(6, 10, 18, 0.92), transparent);
  font-family: var(--font-display);
  font-size: 0.72rem; letter-spacing: 0.18em;
}

.nav-brand {
  display: flex; align-items: center; gap: 0.65rem;
  font-weight: 700; color: var(--text);
}
.brand-mark {
  width: 10px; height: 10px;
  background: var(--amber);
  box-shadow: 0 0 16px color-mix(in oklab, var(--amber) 70%, transparent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  animation: pulseMark 2.4s ease-in-out infinite;
}
.brand-accent { color: var(--amber); }
@keyframes pulseMark {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.nav-meta { display: flex; gap: 0.6rem; }
.pill {
  padding: 0.35rem 0.7rem;
  border: 1px solid color-mix(in oklab, var(--ice) 35%, transparent);
  color: var(--ice);
  background: color-mix(in oklab, var(--void-2) 70%, transparent);
}
.pill.live { display: flex; align-items: center; gap: 0.4rem; color: var(--amber); border-color: color-mix(in oklab, var(--amber) 40%, transparent); }
.pill.live i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
  animation: blink 1.2s step-end infinite;
}
@keyframes blink { 50% { opacity: 0.2; } }

.hero {
  position: relative; z-index: 5;
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: flex-start; justify-content: center;
  padding: clamp(5rem, 12vh, 8rem) clamp(1.25rem, 6vw, 5rem) 4rem;
  max-width: 1400px;
}

.hero-orbit {
  position: absolute; right: clamp(-40px, 8vw, 120px); top: 50%;
  transform: translateY(-50%);
  width: min(42vw, 420px); height: min(42vw, 420px);
  opacity: 0.85; pointer-events: none;
}
.orbit {
  position: absolute; inset: 0; margin: auto;
  border: 1px solid color-mix(in oklab, var(--ice) 25%, transparent);
  border-radius: 50%;
}
.ring-a { animation: spin 28s linear infinite; border-style: dashed; }
.ring-b { width: 72%; height: 72%; top: 14%; left: 14%; animation: spin 18s linear infinite reverse; border-color: color-mix(in oklab, var(--amber) 40%, transparent); }
.ring-c { width: 44%; height: 44%; top: 28%; left: 28%; animation: spin 12s linear infinite; }
.orbit-core {
  position: absolute; width: 18%; height: 18%; top: 41%; left: 41%;
  background: radial-gradient(circle, var(--amber-hot), transparent 70%);
  filter: blur(2px);
  animation: corePulse 3s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes corePulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

.hero-kicker {
  font-family: var(--font-display);
  font-size: 0.7rem; letter-spacing: 0.28em;
  color: var(--ice); margin-bottom: 1.25rem;
  opacity: 0; animation: fadeUp 0.8s ease 0.2s forwards;
}

.glitch {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.2rem, 12vw, 7.5rem);
  letter-spacing: 0.06em;
  line-height: 0.95;
  color: var(--text);
  position: relative;
  text-shadow: 0 0 40px color-mix(in oklab, var(--amber) 35%, transparent);
  opacity: 0; animation: fadeUp 0.9s ease 0.35s forwards;
}

.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute; inset: 0;
  opacity: 0.7;
}
.glitch::before {
  color: var(--ice);
  clip-path: inset(0 0 58% 0);
  transform: translate(-2px, 0);
  animation: glitchShift 3.5s infinite steps(2);
}
.glitch::after {
  color: var(--amber);
  clip-path: inset(62% 0 0 0);
  transform: translate(2px, 0);
  animation: glitchShift 2.8s infinite steps(2) reverse;
}
@keyframes glitchShift {
  0%, 90%, 100% { transform: translate(0); }
  92% { transform: translate(-3px, 1px); }
  94% { transform: translate(3px, -1px); }
  96% { transform: translate(-1px, 2px); }
}

.subtitle {
  margin-top: 1.25rem;
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--steel);
  font-family: var(--font-display);
  font-weight: 500;
  opacity: 0; animation: fadeUp 0.9s ease 0.55s forwards;
}

.typewriter {
  margin-top: 1.5rem;
  min-height: 1.6em;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--ice-dim);
  letter-spacing: 0.08em;
}
.typewriter::after {
  content: "▋";
  margin-left: 2px;
  color: var(--amber);
  animation: blink 1s step-end infinite;
}

.hero-stats {
  display: flex; gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 2.5rem;
  opacity: 0; animation: fadeUp 0.9s ease 0.75s forwards;
}
.stat { display: flex; flex-direction: column; gap: 0.2rem; }
.stat strong {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--amber);
  letter-spacing: 0.04em;
}
.stat span {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.cta {
  margin-top: 2.5rem;
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.75rem; letter-spacing: 0.2em;
  color: #0a0c10; text-decoration: none;
  background: linear-gradient(135deg, var(--amber-hot), var(--amber));
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 0.25s ease, filter 0.25s ease;
  opacity: 0; animation: fadeUp 0.9s ease 0.9s forwards;
}
.cta:hover { transform: translateY(-2px); filter: brightness(1.08); }
.cta span { animation: bob 1.6s ease-in-out infinite; }
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.ai-content {
  position: relative; z-index: 5;
  max-width: var(--max);
  margin: 0 auto 5.5rem;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

.section-head {
  margin-bottom: 2.5rem;
  max-width: 36rem;
}
.section-index {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--amber);
  margin-bottom: 0.5rem;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.section-desc { color: var(--muted); font-size: 1.05rem; }

.panel {
  background: var(--panel);
  border: 1px solid color-mix(in oklab, var(--ice) 18%, transparent);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  box-shadow:
    inset 0 1px 0 color-mix(in oklab, #fff 6%, transparent),
    0 20px 50px rgba(0, 0, 0, 0.35);
  position: relative;
}
.panel::after {
  content: "";
  position: absolute; top: 0; right: 0;
  width: 18px; height: 18px;
  border-top: 2px solid color-mix(in oklab, var(--amber) 60%, transparent);
  border-right: 2px solid color-mix(in oklab, var(--amber) 60%, transparent);
  opacity: 0.7;
}

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Timeline */
.timeline { position: relative; padding-left: 2.5rem; }
.timeline::before {
  content: "";
  position: absolute; left: 0; top: 0.5rem; bottom: 0.5rem; width: 2px;
  background: linear-gradient(180deg, var(--amber), var(--ice), transparent);
}
.timeline-item {
  margin-bottom: 1.25rem;
  padding: 1.35rem 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.timeline-item:hover {
  transform: translateX(6px);
  border-color: color-mix(in oklab, var(--amber) 45%, transparent);
}
.timeline-item::before {
  content: "";
  position: absolute; left: -2.85rem; top: 1.55rem;
  width: 11px; height: 11px;
  background: var(--void);
  border: 2px solid var(--amber);
  transform: rotate(45deg);
  box-shadow: 0 0 12px color-mix(in oklab, var(--amber) 50%, transparent);
}
.timeline-year {
  font-family: var(--font-display);
  font-size: 1.35rem; font-weight: 700;
  color: var(--amber); letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}
.timeline-content h3 { font-size: 1.2rem; margin-bottom: 0.4rem; font-weight: 600; }
.timeline-content p { color: var(--muted); }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}
.card {
  padding: 1.6rem 1.5rem 1.5rem;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in oklab, var(--ice) 45%, transparent);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4), 0 0 30px color-mix(in oklab, var(--ice) 10%, transparent);
}
.card-icon {
  width: 48px; height: 48px; margin-bottom: 1rem; color: var(--ice);
}
.card-icon svg { width: 100%; height: 100%; }
.card h3 {
  font-family: var(--font-display);
  font-size: 1rem; letter-spacing: 0.04em;
  color: var(--ice); margin-bottom: 0.65rem;
}
.card p { color: var(--muted); font-size: 0.98rem; }
.card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.tag {
  font-family: var(--font-display);
  font-size: 0.62rem; letter-spacing: 0.06em;
  padding: 0.25rem 0.5rem;
  color: var(--amber);
  border: 1px solid color-mix(in oklab, var(--amber) 35%, transparent);
  background: color-mix(in oklab, var(--amber) 8%, transparent);
}

/* Tech */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}
.tech-card { padding: 1.5rem; transition: transform 0.3s ease; }
.tech-card:hover { transform: translateY(-4px); }
.tech-header { display: flex; align-items: center; gap: 0.85rem; margin-bottom: 0.85rem; }
.tech-number {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 900;
  color: color-mix(in oklab, var(--ice) 25%, transparent);
  line-height: 1;
}
.tech-header h3 {
  font-family: var(--font-display);
  font-size: 1rem; color: var(--ice); letter-spacing: 0.06em;
}
.tech-card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1rem; }
.tech-formula {
  font-family: var(--font-display);
  font-size: 0.72rem; letter-spacing: 0.02em;
  color: var(--amber);
  padding: 0.75rem 0.9rem;
  background: color-mix(in oklab, var(--amber) 7%, transparent);
  border-left: 2px solid var(--amber);
  overflow-x: auto;
}

/* Industry */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.industry-card { padding: 1.5rem; transition: transform 0.3s ease; }
.industry-card:hover { transform: translateY(-4px); border-color: color-mix(in oklab, var(--amber) 40%, transparent); }
.industry-card h3 {
  font-family: var(--font-display);
  font-size: 0.95rem; letter-spacing: 0.06em;
  color: var(--amber); margin-bottom: 0.85rem;
  display: flex; align-items: center; gap: 0.65rem;
}
.ind-code {
  font-size: 0.65rem;
  padding: 0.2rem 0.4rem;
  border: 1px solid color-mix(in oklab, var(--ice) 35%, transparent);
  color: var(--ice);
}
.industry-card ul { list-style: none; }
.industry-card li {
  color: var(--muted);
  font-size: 0.95rem;
  padding: 0.35rem 0 0.35rem 1rem;
  position: relative;
}
.industry-card li::before {
  content: "//";
  position: absolute; left: 0;
  color: var(--amber);
  font-family: var(--font-display);
  font-size: 0.65rem;
  top: 0.55rem;
}

/* Ethics */
.ethics-content { padding: 1.75rem; }
.ethics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.ethics-item {
  padding: 1.25rem;
  background: color-mix(in oklab, var(--void) 55%, transparent);
  border: 1px solid color-mix(in oklab, var(--ice) 12%, transparent);
  transition: border-color 0.3s ease;
}
.ethics-item:hover { border-color: color-mix(in oklab, var(--amber) 40%, transparent); }
.ethics-item h4 {
  font-family: var(--font-display);
  font-size: 0.9rem; letter-spacing: 0.08em;
  color: var(--ice); margin-bottom: 0.5rem;
}
.ethics-item p { color: var(--muted); font-size: 0.95rem; }

/* Learning path */
.learning-path { padding: 1.75rem 1.75rem 1.75rem 1.25rem; }
.path-step {
  display: flex; gap: 1.25rem;
  margin-bottom: 1.1rem; position: relative;
}
.path-step:last-child { margin-bottom: 0; }
.path-marker {
  width: 2.4rem; height: 2.4rem; flex-shrink: 0;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700;
  color: #0a0c10;
  background: linear-gradient(135deg, var(--amber-hot), var(--amber));
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}
.path-content {
  flex: 1;
  padding: 0.9rem 1.1rem;
  border: 1px solid color-mix(in oklab, var(--ice) 14%, transparent);
  background: color-mix(in oklab, var(--void) 40%, transparent);
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.path-content:hover {
  transform: translateX(4px);
  border-color: color-mix(in oklab, var(--ice) 40%, transparent);
}
.path-content h4 {
  font-family: var(--font-display);
  font-size: 0.9rem; color: var(--ice);
  letter-spacing: 0.06em; margin-bottom: 0.35rem;
}
.path-content p { color: var(--muted); font-size: 0.95rem; }

footer {
  position: relative; z-index: 5;
  text-align: left;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 4vw, 2rem) 5.5rem;
  border-top: 1px solid color-mix(in oklab, var(--ice) 15%, transparent);
  color: var(--muted);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem; letter-spacing: 0.2em;
  color: var(--amber); margin-bottom: 0.5rem;
}
.footer-sub { margin-top: 0.35rem; font-size: 0.9rem; opacity: 0.75; }

.status-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem;
  padding: 0.55rem clamp(1rem, 3vw, 2rem);
  font-family: var(--font-display);
  font-size: 0.65rem; letter-spacing: 0.14em;
  color: var(--steel);
  background: color-mix(in oklab, var(--void) 92%, transparent);
  border-top: 1px solid color-mix(in oklab, var(--ice) 20%, transparent);
  backdrop-filter: blur(12px);
}
.status-indicator { display: flex; align-items: center; gap: 0.45rem; color: var(--ice); }
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--ice);
  box-shadow: 0 0 10px var(--ice);
  animation: blink 2s step-end infinite;
}

.loader {
  position: fixed; inset: 0; z-index: 9999;
  display: grid; place-items: center;
  background: var(--void);
  transition: opacity 0.55s ease, visibility 0.55s ease;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-ring {
  width: 88px; height: 88px;
  border: 2px solid color-mix(in oklab, var(--ice) 25%, transparent);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  grid-area: 1 / 1;
}
.loader-core {
  width: 18px; height: 18px; grid-area: 1 / 1; margin: auto;
  background: var(--amber);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  box-shadow: 0 0 20px var(--amber);
}
.loader-text {
  position: absolute; bottom: calc(50% - 90px);
  font-family: var(--font-display);
  font-size: 0.7rem; letter-spacing: 0.22em;
  color: var(--ice);
}
.loader-bar {
  position: absolute; bottom: calc(50% - 115px);
  width: 160px; height: 2px;
  background: color-mix(in oklab, var(--ice) 15%, transparent);
  overflow: hidden;
}
.loader-bar span {
  display: block; height: 100%; width: 40%;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  animation: loadBar 1.2s ease-in-out infinite;
}
@keyframes loadBar {
  from { transform: translateX(-100%); }
  to { transform: translateX(350%); }
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--void); }
::-webkit-scrollbar-thumb {
  background: color-mix(in oklab, var(--amber) 40%, transparent);
  border-radius: 0;
}

@media (max-width: 860px) {
  .hero-orbit { opacity: 0.35; right: -80px; }
  .hero { align-items: stretch; }
  .hero-stats { flex-wrap: wrap; }
  .timeline { padding-left: 1.75rem; }
  .timeline-item::before { left: -2.1rem; }
  .status-bar { flex-wrap: wrap; justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .scan-line, .bg-mesh { animation: none; }
}