/* ==========================================================================
   BverGame Design System
   暗色调 + 电光绿主色 / 野兽派几何风格
   ========================================================================== */

:root {
  --bg: #0A0A0A;
  --bg-elev: #141414;
  --bg-card: #1A1A1A;
  --border: #2A2A2A;
  --text: #FAFAFA;
  --text-dim: #888;
  --text-mute: #555;
  --accent: #C6FF00;      /* 电光绿 主色 */
  --accent-2: #FF6B35;    /* 橙红 辅助 */
  --accent-3: #FFD60A;    /* 鲜黄 强调 */
  --danger: #FF3366;
  --grid: rgba(255,255,255,0.04);

  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Courier New', monospace;

  --container: 1240px;
  --radius: 0;
  --radius-sm: 4px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 16px;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { cursor: pointer; font-family: inherit; border: 0; background: transparent; color: inherit; }

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; line-height: 1.1; }
h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.125rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1rem; color: var(--text-dim); }
.mono { font-family: var(--font-mono); }

/* Layout */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
@media (max-width: 768px) { .section { padding: 48px 0; } }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--accent);
  display: inline-block;
  transform: rotate(45deg);
  position: relative;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--bg);
}
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { font-size: 0.95rem; color: var(--text-dim); position: relative; }
.nav a:hover { color: var(--accent); }
.nav a.active { color: var(--text); }
.nav-cta { display: flex; gap: 12px; align-items: center; }
.lang-switch {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.lang-switch:hover { border-color: var(--accent); color: var(--accent); }

.mobile-toggle { display: none; }
@media (max-width: 860px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-elev); flex-direction: column; padding: 24px; border-bottom: 1px solid var(--border); }
  .nav.open { display: flex; }
  .mobile-toggle { display: flex; flex-direction: column; gap: 4px; padding: 8px; }
  .mobile-toggle span { width: 24px; height: 2px; background: var(--text); }
}

/* Hero */
.hero {
  padding: 80px 0 64px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; gap: 32px; } }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero-tag::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
.hero h1 { margin-bottom: 24px; }
.hero h1 em { font-style: italic; color: var(--accent); font-weight: 400; }
.hero-sub { font-size: 1.125rem; color: var(--text-dim); margin-bottom: 32px; max-width: 540px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--text); transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--accent); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-arrow::after { content: '→'; transition: transform var(--transition); }
.btn-arrow:hover::after { transform: translateX(4px); }

/* Section Header */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}
.section-head p { max-width: 480px; color: var(--text-dim); }

/* Game Grid */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.game-card {
  background: var(--bg-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  min-height: 280px;
}
.game-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.game-card:hover { background: var(--bg-elev); }
.game-card:hover::before { width: 100%; }
.game-thumb {
  aspect-ratio: 16/10;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.game-thumb svg { width: 70%; height: 70%; }
.game-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
}
.game-title { font-size: 1.25rem; font-family: var(--font-display); }
.game-desc { font-size: 0.9rem; color: var(--text-dim); margin-bottom: auto; }
.game-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.article-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.article-thumb { aspect-ratio: 16/9; background: var(--bg); border: 1px solid var(--border); overflow: hidden; }
.article-thumb svg { width: 100%; height: 100%; }
.article-cat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.article-title { font-size: 1.25rem; font-family: var(--font-display); line-height: 1.3; }
.article-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-mute); display: flex; gap: 12px; margin-top: auto; }

/* Article Body */
.article-body {
  max-width: 720px;
  margin: 0 auto;
}
.article-body h1 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: 24px; }
.article-body .article-hero-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-mute);
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.article-body .article-hero-meta .accent { color: var(--accent); }
.article-body figure { margin: 32px 0; }
.article-body figure svg { width: 100%; border: 1px solid var(--border); background: var(--bg-elev); }
.article-body figcaption { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-mute); text-align: center; margin-top: 12px; }
.article-body h2 { font-size: 1.75rem; margin-top: 48px; margin-bottom: 16px; }
.article-body h3 { font-size: 1.25rem; margin-top: 32px; margin-bottom: 12px; }
.article-body p { font-size: 1.05rem; color: var(--text); margin-bottom: 20px; line-height: 1.75; }
.article-body p.lead { font-size: 1.2rem; color: var(--text-dim); }
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin: 24px 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text);
}
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 20px; color: var(--text); }
.article-body li { margin-bottom: 8px; }
.article-body code {
  font-family: var(--font-mono);
  background: var(--bg-elev);
  padding: 2px 6px;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

/* Game Page */
.game-stage {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 0;
}
.game-stage canvas, .game-stage .game-board {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  margin: 0 auto;
  display: block;
  max-width: 100%;
}
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}
.game-controls {
  display: flex;
  gap: 12px;
  margin: 24px 0;
  justify-content: center;
  flex-wrap: wrap;
}
.game-stats {
  display: flex;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.stat-block { display: flex; flex-direction: column; }
.stat-label { font-size: 0.75rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.1em; }
.stat-val { font-size: 1.5rem; color: var(--accent); }
.game-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
  margin-top: 32px;
}
.game-info h2 { font-size: 1.5rem; margin-bottom: 12px; }
.game-info p { color: var(--text-dim); }

/* Team / About */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}
.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
}
.team-avatar { width: 120px; height: 120px; margin: 0 auto 20px; border: 2px solid var(--accent); }
.team-name { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 4px; }
.team-role { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 16px; }
.team-bio { font-size: 0.95rem; color: var(--text-dim); text-align: left; }

/* Stats Strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stat-cell {
  padding: 32px 24px;
  border-right: 1px solid var(--border);
  text-align: left;
}
.stat-cell:last-child { border-right: 0; }
.stat-big {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-small {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 16px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: var(--text-dim); font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mute);
  flex-wrap: wrap;
  gap: 16px;
}

/* Page Hero (interior pages) */
.page-hero {
  padding: 80px 0 32px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { margin-bottom: 16px; }
.page-hero p { color: var(--text-dim); font-size: 1.125rem; max-width: 640px; }
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mute);
  margin-bottom: 24px;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin: 0 8px; }

/* Filter Bar */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 14px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active { border-color: var(--accent); color: var(--accent); }

/* Utilities */
.text-center { text-align: center; }
.mt-2 { margin-top: 32px; }
.mb-2 { margin-bottom: 32px; }
.divider { height: 1px; background: var(--border); margin: 48px 0; }

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.6s ease forwards; }

/* Hidden by default for SR-only */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* 404 */
.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 24px;
}
.error-code { font-family: var(--font-display); font-size: 8rem; color: var(--accent); line-height: 1; }