:root {
  --hero-grid-color: rgba(0, 212, 255, 0.06);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 0 80px;
}

#particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(var(--hero-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--hero-grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 100px;
  font-size: 0.8125rem;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  background: rgba(0, 212, 255, 0.04);
}

.hero-badge i {
  font-size: 0.625rem;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-family: var(--font-mono);
}

.hero-feature i {
  color: var(--accent-cyan);
  font-size: 0.75rem;
}

/* Hero Stats */
.hero-stats {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-stat {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: border-color 0.3s, background 0.3s;
}

.hero-stat:hover {
  border-color: rgba(0,212,255,0.2);
  background: rgba(0,212,255,0.03);
}

.hero-stat i {
  color: var(--accent-cyan);
  font-size: 1rem;
}

.hero-stat .stat-value {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1rem;
}

.hero-stat .stat-label {
  color: var(--text-muted);
}

.hero-stat .stat-patch {
  color: var(--accent-green);
  font-weight: 500;
  font-size: 0.75rem;
  opacity: 0.85;
}

.hero-stat.highlight {
  border-color: rgba(0,212,255,0.15);
  background: rgba(0,212,255,0.04);
}

.hero-stat.highlight i {
  animation: pulse-dot 2s infinite;
}

/* Category cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  padding: 28px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  display: block;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card:hover::before {
  opacity: 1;
}

.category-card:nth-child(1)::before { background: linear-gradient(90deg, #00d4ff, #3b82f6); }
.category-card:nth-child(2)::before { background: linear-gradient(90deg, #3b82f6, #6366f1); }
.category-card:nth-child(3)::before { background: linear-gradient(90deg, #6366f1, #7c3aed); }
.category-card:nth-child(4)::before { background: linear-gradient(90deg, #7c3aed, #a855f7); }
.category-card:nth-child(5)::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.category-card:nth-child(6)::before { background: linear-gradient(90deg, #10b981, #3b82f6); }

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent-cyan);
}

.category-card:nth-child(2) .category-icon { background: rgba(99, 102, 241, 0.08); color: #6366f1; }
.category-card:nth-child(3) .category-icon { background: rgba(124, 58, 237, 0.08); color: var(--accent-purple); }
.category-card:nth-child(4) .category-icon { background: rgba(168, 85, 247, 0.08); color: #a855f7; }
.category-card:nth-child(5) .category-icon { background: rgba(245, 158, 11, 0.08); color: var(--accent-orange); }
.category-card:nth-child(6) .category-icon { background: rgba(16, 185, 129, 0.08); color: var(--accent-green); }

.category-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.category-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.category-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 100px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.12);
  color: var(--accent-cyan);
  font-size: 0.6875rem;
  font-weight: 600;
  white-space: nowrap;
}

.cat-badge i {
  font-size: 0.625rem;
}

/* Latest resources */
.latest-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.latest-card {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  text-decoration: none;
}

.latest-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.latest-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(0, 212, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.latest-info {
  flex: 1;
  min-width: 0;
}

.latest-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.latest-meta {
  display: flex;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.latest-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.latest-link {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* Safety section */
.safety-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.safety-card {
  padding: 32px;
  text-align: center;
}

.safety-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.safety-card:nth-child(1) .safety-icon {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent-cyan);
}

.safety-card:nth-child(2) .safety-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
}

.safety-card:nth-child(3) .safety-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-orange);
}

.safety-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.safety-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 1024px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-features {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .latest-grid {
    grid-template-columns: 1fr;
  }

  .safety-grid {
    grid-template-columns: 1fr;
  }
}

/* Support button */
.support-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: none;
  border-radius: 100px;
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(238, 90, 36, 0.35);
  transition: all 0.3s ease;
}

.support-btn:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 28px rgba(238, 90, 36, 0.45);
}

.support-btn i {
  font-size: 1rem;
  animation: supportPulse 1.5s ease infinite;
}

@keyframes supportPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* Support modal overlay */
.support-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
}

.support-overlay.active {
  display: block;
}

/* Support modal */
.support-modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1001;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px 36px 32px;
  width: 90%;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.support-modal.active {
  display: block;
}

.support-modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 4px;
  transition: color 0.3s ease;
}

.support-modal-close:hover {
  color: var(--text-primary);
}

.support-modal-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.15), rgba(238, 90, 36, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
  color: #ff6b6b;
}

.support-modal h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.support-modal-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.support-modal-subdesc {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.7;
  margin-bottom: 24px;
}

.support-qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.support-qr-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  transition: border-color 0.3s ease;
}

.support-qr-item:hover {
  border-color: var(--accent-cyan);
}

.support-qr-item img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 8px;
  margin-bottom: 8px;
  background: #fff;
}

.support-qr-item span {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.support-qr-item .fa-alipay {
  color: #1677ff;
  font-size: 1rem;
}

.support-qr-item .fa-weixin {
  color: #07c160;
  font-size: 1rem;
}

.support-modal-footer {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.6;
}

@media (max-width: 480px) {
  .support-btn {
    bottom: 20px;
    right: 20px;
    padding: 10px 16px;
    font-size: 0.8125rem;
  }

  .support-modal {
    padding: 32px 20px 24px;
  }
}