/* EvoHive — 极客科技风，深色 + 赛博金（Cyber Gold）点缀 */
:root {
  --bg-deep: #06060a;
  --bg-main: #0c0c12;
  --bg-card: #12121a;
  --bg-elevated: #181822;
  --border-subtle: rgba(255, 215, 0, 0.12);
  --border-accent: rgba(255, 215, 0, 0.35);
  --text-primary: #e8e6e3;
  --text-secondary: #9ca3af;
  --accent: #FFD700;
  --accent-dim: #E6B800;
  --accent-blue: #22d3ee;
  --glow: rgba(255, 215, 0, 0.2);
  --font-display: 'JetBrains Mono', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --space: 1.5rem;
  --radius: 6px;
  --max-width: 960px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space) 1.5rem;
  background: linear-gradient(to bottom, var(--bg-main) 70%, transparent);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.nav-logo {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.nav-logo:hover { color: var(--accent-dim); }
.nav-sub {
  color: var(--text-secondary);
  margin-right: auto;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--accent); background: var(--bg-card); }
.lang-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: color 0.2s, border-color 0.2s;
}
.lang-toggle:hover { color: var(--accent); border-color: var(--border-accent); }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
}

/* Main */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.25rem 4rem;
}

.section {
  margin-bottom: 4rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border-subtle);
}
.section:last-of-type { border-bottom: none; }

.section-symbol {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}
h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  color: var(--text-primary);
  margin: 0 0 1rem;
  font-weight: 600;
}
.lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 0 1.5rem;
  max-width: 42em;
}
.text-muted {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 1rem 0 0;
}

/* Hero */
.hero {
  position: relative;
  text-align: center;
  padding: 3rem 0 4rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0;
  overflow: hidden;
}

/* 抽象蜂巢背景：纯 CSS 3D 缩放与错落呼吸 */
.organic-hive {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  perspective: 1000px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hex {
  position: absolute;
  width: 120px;
  height: 208px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='208' viewBox='0 0 120 208'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.15' stroke-width='1.5' d='M60 0l59.5 34.6v69.3L60 138.6 .5 104V34.6L60 0z'/%3E%3C/svg%3E");
  background-repeat: no-root;
  opacity: 0;
  transform-style: preserve-3d;
  animation: organicPulse 8s ease-in-out infinite alternate;
}

.hex-1 { left: 50%; top: 50%; margin-left: -60px; margin-top: -104px; animation-delay: 0s; transform: translateZ(-100px) rotateX(10deg); width: 180px; height: 312px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='312' viewBox='0 0 180 312'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.08' stroke-width='2' d='M90 0l89.5 52v104L90 208 .5 156V52L90 0z'/%3E%3C/svg%3E"); }
.hex-2 { left: 30%; top: 20%; animation-delay: -2s; transform: translateZ(-200px) rotateY(15deg); }
.hex-3 { left: 70%; top: 70%; animation-delay: -4s; transform: translateZ(-150px) rotateX(-15deg); }
.hex-4 { left: 20%; top: 60%; animation-delay: -1s; transform: translateZ(-50px) rotateY(-10deg); width: 80px; height: 138px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='138' viewBox='0 0 80 138'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.2' stroke-width='1' d='M40 0l39.5 23v46L40 92 .5 69V23L40 0z'/%3E%3C/svg%3E"); }
.hex-5 { left: 75%; top: 25%; animation-delay: -5s; transform: translateZ(-300px) rotateZ(5deg); width: 150px; height: 260px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='260' viewBox='0 0 150 260'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.1' stroke-width='1.5' d='M75 0l74.5 43.3v86.6L75 173.2 .5 130V43.3L75 0z'/%3E%3C/svg%3E"); }
.hex-6 { left: 45%; top: 80%; animation-delay: -3s; transform: translateZ(50px) rotateX(5deg) rotateY(5deg); width: 60px; height: 104px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='104' viewBox='0 0 60 104'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.25' stroke-width='1' d='M30 0l29.5 17.3v34.6L30 69.3 .5 52V17.3L30 0z'/%3E%3C/svg%3E"); }
.hex-7 { left: 10%; top: 30%; animation-delay: -6s; transform: translateZ(-250px) rotateY(20deg); width: 100px; height: 173px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='173' viewBox='0 0 100 173'%3E%3Cpath fill='none' stroke='%23FFD700' stroke-opacity='0.12' stroke-width='1.5' d='M50 0l49.5 28.8v57.7L50 115.5 .5 86.6V28.8L50 0z'/%3E%3C/svg%3E"); }

@keyframes organicPulse {
  0% {
    opacity: 0.1;
    filter: drop-shadow(0 0 2px rgba(255, 215, 0, 0.1));
  }
  50% {
    opacity: 0.8;
    filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.4));
  }
  100% {
    opacity: 0.2;
    filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.2));
  }
}

/* 加上中心径向渐变，让背景看起来更有深邃感 */
.organic-hive::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 215, 0, 0.08) 0%, transparent 60%);
  animation: bgBreathe 10s ease-in-out infinite alternate;
}

@keyframes bgBreathe {
  0% { opacity: 0.5; transform: scale(0.9); }
  100% { opacity: 1; transform: scale(1.1); }
}

.hero .section-symbol,
.hero .hero-title,
.hero .hero-tagline,
.hero .hero-cta,
.hero .hero-badges {
  position: relative;
  z-index: 1;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  text-shadow: 0 0 24px var(--glow), 0 0 48px rgba(255, 215, 0, 0.15);
}
.hero-tagline {
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  margin: 0 auto 2rem;
  max-width: 36em;
  line-height: 1.6;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.hero-badges span {
  padding: 0.35rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg-deep);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: var(--bg-deep);
}
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--border-accent);
}
.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--accent);
}
.btn-lg { padding: 0.85rem 1.75rem; font-size: 1rem; }

/* Positioning grid */
.positioning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.card h3 { margin: 0 0 0.75rem; font-size: 1rem; color: var(--text-secondary); }
.card ul { margin: 0; padding-left: 1.25rem; color: var(--text-secondary); font-size: 0.95rem; }
.card li { margin-bottom: 0.35rem; }
.card-accent { border-color: var(--border-accent); }
.card-accent h3 { color: var(--accent); }

/* Model cards */
.model-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.model-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 24px var(--glow);
}
.model-card-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}
.model-card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; color: var(--text-primary); }
.model-card p { margin: 0; font-size: 0.95rem; color: var(--text-secondary); }

/* Tuple grid */
.tuple-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.tuple-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s;
}
.tuple-card:hover { border-color: var(--border-accent); }
.tuple-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}
.tuple-essence { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

/* Deploy grid */
.deploy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.deploy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.deploy-card h3 { margin: 0 0 0.5rem; font-size: 1rem; color: var(--accent); }
.deploy-card p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

/* Interaction list */
.interaction-list {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
  color: var(--text-secondary);
  max-width: 42em;
}
.interaction-list li { margin-bottom: 0.5rem; }

/* Output grid */
.output-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.output-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.output-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}
.output-card p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

/* Roadmap */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.roadmap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.roadmap-card h3 { margin: 0 0 0.75rem; font-size: 1.1rem; color: var(--accent); }
.roadmap-card p { margin: 0; font-size: 0.95rem; color: var(--text-secondary); }

/* CTA section */
.cta-section {
  text-align: center;
  padding: 3rem 1rem;
}
.cta-section .lead { margin-left: auto; margin-right: auto; }
.cta-links {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.cta-links a {
  color: var(--accent);
  text-decoration: none;
}
.cta-links a:hover { color: var(--accent-dim); text-decoration: underline; }
.cta-sep { color: var(--text-secondary); margin: 0 0.25rem; }

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.footer p { margin: 0 0 0.5rem; }
.footer-lang { margin-top: 0.5rem; font-size: 0.85rem; }
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { color: var(--accent-dim); text-decoration: underline; }

/* Responsive */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    flex-basis: 100%;
    flex-direction: column;
    order: 10;
  }
  .nav-toggle { display: block; margin-left: auto; }
  .lang-toggle { order: 1; }
  main { padding-top: 4rem; }
  .hero { padding: 2rem 0 3rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 280px; text-align: center; }
  .section { margin-bottom: 3rem; padding-bottom: 2rem; }
  .positioning-grid,
  .model-cards,
  .tuple-grid,
  .deploy-grid,
  .roadmap-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .nav-inner { padding: 0.5rem 0; }
  .nav-sub { font-size: 0.8rem; }
  .hero-title { font-size: 1.5rem; }
  .hero-tagline { font-size: 0.9rem; }
}