/* =========================================
   实验页样式
   ========================================= */
#lab-header { padding: 140px 0 30px; text-align: center; }
.lab-sub { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-secondary); margin: 12px auto 28px; max-width: 600px; }

.lab-filters { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 40px; }
.filter-tag {
  padding: 8px 18px; border-radius: 20px; font-size: 0.9rem; font-weight: 500;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary); transition: var(--transition); user-select: none;
}
.filter-tag:hover { background: rgba(123,104,238,0.15); border-color: rgba(123,104,238,0.3); color: var(--text-primary); }
.filter-tag.active {
  background: linear-gradient(135deg, rgba(123,104,238,0.25), rgba(147,112,219,0.2));
  border-color: var(--accent-purple); color: var(--text-primary); box-shadow: 0 0 12px rgba(123,104,238,0.4);
}

.exp-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 32px; margin-bottom: 80px;
}
.exp-card {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px;
  overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.4s ease;
  display: flex; flex-direction: column; position: relative;
}
.exp-card:hover { transform: translateY(-8px); box-shadow: 0 16px 32px rgba(0,0,0,0.5), 0 0 28px rgba(123,104,238,0.25); }
.exp-card.hidden { opacity: 0; transform: scale(0.96); pointer-events: none; position: absolute; }

.exp-preview {
  height: 220px; position: relative; background: var(--code-bg);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.exp-preview::before {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(123,104,238,0.12) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(123,104,238,0.12) 1px, transparent 1px);
  background-size: 28px 28px; opacity: 0.4; pointer-events: none;
}
.preview-orb { width: 50px; height: 50px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, var(--accent-gold), transparent); box-shadow: 0 0 25px rgba(255,215,0,0.5); animation: float 4s ease-in-out infinite; }
.preview-ring { position: absolute; border: 2px solid rgba(123,104,238,0.4); border-radius: 50%; animation: spin 6s linear infinite; }
.preview-ring:nth-child(1) { width: 100px; height: 100px; }
.preview-ring:nth-child(2) { width: 60px; height: 60px; animation-duration: 4s; border-color: rgba(96,165,250,0.5); animation-direction: reverse; }
.preview-wave { position: absolute; bottom: 0; left: 0; width: 100%; height: 40px; background: linear-gradient(90deg, transparent, rgba(123,104,238,0.3), transparent); transform: scaleX(0); animation: wave-scan 3s ease-in-out infinite alternate; }

@keyframes float { 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-12px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes wave-scan { 0% { transform: scaleX(0.4); opacity: 0.2; } 100% { transform: scaleX(1.2); opacity: 0.6; } }

.exp-content { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.exp-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.status-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.75rem; padding: 4px 10px; border-radius: 12px; font-weight: 500;
}
.status-running { background: rgba(16,185,129,0.1); color: #34D399; border: 1px solid rgba(16,185,129,0.3); }
.status-debug { background: rgba(245,158,11,0.1); color: #F59E0B; border: 1px solid rgba(245,158,11,0.3); }
.status-archived { background: rgba(107,114,128,0.1); color: #9CA3AF; border: 1px solid rgba(107,114,128,0.3); }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-running .status-dot { animation: pulse-dot 1.5s infinite; }
@keyframes pulse-dot { 0%,100%{ opacity:1; transform:scale(1); } 50%{ opacity:0.4; transform:scale(0.7); } }

.exp-title { font-size: 1.2rem; font-weight: 600; color: var(--text-primary); line-height: 1.4; }
.exp-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: break-word;
}
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.06); }
.tag { font-size: 0.75rem; padding: 3px 9px; border-radius: 8px; background: rgba(255,255,255,0.05); color: var(--text-secondary); border: 1px solid rgba(255,255,255,0.08); }
.run-btn {
  margin-top: 16px; width: 100%; padding: 10px; border-radius: 10px; border: none;
  background: linear-gradient(135deg, rgba(123,104,238,0.2), rgba(147,112,219,0.15));
  color: var(--text-primary); font-weight: 600; font-size: 0.9rem; transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.run-btn:hover { background: linear-gradient(135deg, rgba(123,104,238,0.35), rgba(147,112,219,0.25)); box-shadow: 0 0 16px rgba(123,104,238,0.4); transform: translateY(-2px); }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(5,8,20,0.85); backdrop-filter: blur(8px);
  z-index: 100; display: flex; align-items: center; justify-content: center; padding: 20px;
  opacity: 0; visibility: hidden; transition: 0.3s ease;
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal-box {
  width: 100%; max-width: 850px; background: var(--bg-deep); border: 1px solid var(--card-border);
  border-radius: 16px; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.6);
  transform: translateY(20px); transition: transform 0.35s ease;
}
.modal-overlay.open .modal-box { transform: translateY(0); }
.modal-header {
  display: flex; justify-content: space-between; align-items: center; padding: 16px 20px;
  background: rgba(255,255,255,0.03); border-bottom: 1px solid rgba(255,255,255,0.05);
}
.modal-title { font-weight: 600; display: flex; align-items: center; gap: 8px; }
.close-btn { background: transparent; border: none; color: var(--text-secondary); font-size: 1.2rem; cursor: pointer; transition: 0.2s; }
.close-btn:hover { color: var(--text-highlight); transform: rotate(90deg); }
.modal-body { height: 400px; background: #050814; position: relative; display: flex; align-items: center; justify-content: center; }
.terminal-log {
  width: 100%; height: 100%; padding: 20px; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
  color: #A0AEC0; overflow-y: auto; white-space: pre-wrap; line-height: 1.6;
}
.log-line { margin-bottom: 4px; opacity: 0; animation: fadeIn 0.1s forwards; }
.log-line.success { color: #34D399; }
.log-line.warn { color: #F59E0B; }
@keyframes fadeIn { to { opacity: 1; } }
.demo-canvas { width: 100%; height: 100%; display: none; }
.loading-spinner { width: 40px; height: 40px; border: 3px solid rgba(123,104,238,0.2); border-top-color: var(--accent-purple); border-radius: 50%; animation: spin 1s linear infinite; }

/* =========================================
   响应式调整
   ========================================= */
@media (max-width: 768px) {
  .exp-grid { grid-template-columns: 1fr; }
  .modal-body { height: 320px; }
  #lab-header { padding-top: 110px; }
}