:root {
  --bg-dark: #0b0e0d;
  --bg-card: #141816;
  --bg-card-hover: #1c221f;
  --bg-glass: rgba(14, 18, 16, 0.72);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-accent: rgba(212, 243, 74, 0.35);
  
  --text-main: #f5f6f4;
  --text-muted: #9da5a0;
  --text-dim: #5c6460;
  
  --accent: #d4f34a;
  --accent-glow: rgba(212, 243, 74, 0.25);
  --accent-dark: #1b280b;
  --accent-mint: #a8dcc5;
  --accent-terracotta: #b96b4b;
  
  --paper-bg: #f4f5f0;
  --paper-ink: #1b1d1c;
  --paper-card: #ffffff;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Monaco, Consolas, monospace;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-smooth: cubic-bezier(0.65, 0, 0.35, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(212, 243, 74, 0.08), transparent 70%),
    radial-gradient(circle at 100% 40%, rgba(168, 220, 197, 0.04), transparent 40%),
    var(--bg-dark);
}

/* Subtle Film Grain Texture Overlay */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  opacity: 0.035;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

.section-spacing {
  padding: 130px 0;
  position: relative;
  scroll-margin-top: 80px;
}

section[id] {
  scroll-margin-top: 90px;
}

@media (max-width: 768px) {
  .section-spacing {
    padding: 90px 0;
  }
  .container {
    padding: 0 20px;
  }
}

/* Typography Hierarchy */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  backdrop-filter: blur(12px);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.4s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 1px;
  background: var(--accent);
}

.headline-hero {
  font-size: clamp(40px, 6.2vw, 84px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: #ffffff;
  margin-bottom: 24px;
}

.headline-hero span.highlight {
  color: var(--accent);
  display: inline-block;
  position: relative;
}

.headline-section {
  font-size: clamp(32px, 4vw, 54px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: #ffffff;
  margin-bottom: 20px;
}

.subheadline {
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.68;
  color: var(--text-muted);
  max-width: 640px;
  font-weight: 400;
}

/* Button & Link Styles */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--accent);
  color: #0b0e0d;
  font-size: 15px;
  font-weight: 650;
  padding: 14px 28px;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.28s var(--ease-out-expo);
  box-shadow: 0 4px 20px var(--accent-glow);
  cursor: pointer;
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212, 243, 74, 0.4);
  background: #def566;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 550;
  padding: 14px 28px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(16px);
  transition: all 0.28s var(--ease-out-expo);
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
}

/* Section Header Shared */
.section-header-center {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-header-left {
  max-width: 720px;
  margin-bottom: 60px;
}