/* ============================================================
   EdgePilot Demo Site — 主题样式
   暗色科技风，体现 AI + 边缘 + 飞行的概念
   ============================================================ */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2235;
  --bg-card-hover: #1e293b;
  --border: #2a3a52;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.3);
  --accent-red: #ef4444;
  --accent-orange: #f59e0b;
  --accent-purple: #8b5cf6;
  --gradient-hero: linear-gradient(135deg, #0a0e17 0%, #1a1a3e 50%, #0a0e17 100%);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ============================================================
   导航栏
   ============================================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

nav .nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

nav .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

nav .logo .logo-icon {
  font-size: 1.5rem;
}

nav .logo .logo-tag {
  font-size: 0.65rem;
  background: var(--accent);
  color: white;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav .nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}

nav .nav-links a:hover,
nav .nav-links a.active {
  color: var(--accent);
}

nav .nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* ============================================================
   通用布局
   ============================================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

/* ============================================================
   卡片
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all 0.3s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ============================================================
   Hero 区
   ============================================================ */
.hero {
  background: var(--gradient-hero);
  padding: 6rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 50% 50%, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.3;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  position: relative;
  background: linear-gradient(135deg, #fff 0%, #93c5fd 50%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .tagline {
  font-size: 1.3rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
}

.hero .hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
  position: relative;
}

.hero .stat {
  text-align: center;
}

.hero .stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  font-family: var(--font-mono);
}

.hero .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ============================================================
   指标对比条
   ============================================================ */
.metric-compare {
  margin: 1.5rem 0;
}

.metric-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.metric-label {
  width: 140px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.metric-bar-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-bar {
  height: 8px;
  border-radius: 4px;
  transition: width 1s ease;
}

.metric-bar.before {
  background: var(--accent-red);
  opacity: 0.7;
}

.metric-bar.after {
  background: var(--accent-green);
}

.metric-values {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.metric-values .improved {
  color: var(--accent-green);
  font-weight: 600;
}

/* ============================================================
   表格
   ============================================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  font-size: 0.9rem;
}

tr:hover td {
  background: var(--bg-card-hover);
}

/* ============================================================
   状态标签
   ============================================================ */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-green { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.badge-red { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }
.badge-orange { background: rgba(245, 158, 11, 0.15); color: var(--accent-orange); }
.badge-blue { background: rgba(59, 130, 246, 0.15); color: var(--accent); }
.badge-purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }

/* ============================================================
   代码块
   ============================================================ */
pre, code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

code {
  color: var(--accent);
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: #2563eb;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ============================================================
   交互区域
   ============================================================ */
.demo-section {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.demo-section h3 {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.demo-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}

.demo-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.demo-output {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ============================================================
   图片画廊
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16/10;
  background: var(--bg-secondary);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-item .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.gallery-item .img-size {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0,0,0,0.6);
}

.gallery-item .img-size.original { color: var(--accent-red); }
.gallery-item .img-size.optimized { color: var(--accent-green); }

/* ============================================================
   仪表盘
   ============================================================ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.stat-card .stat-label {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.stat-card .stat-change {
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.stat-card .stat-change.positive { color: var(--accent-green); }
.stat-card .stat-change.negative { color: var(--accent-red); }

.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.chart-container h3 {
  margin-bottom: 1rem;
}

.chart-placeholder {
  height: 200px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 0 1rem;
}

.chart-bar {
  flex: 1;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  min-height: 4px;
  transition: height 0.5s ease;
  opacity: 0.7;
}

.chart-bar:hover {
  opacity: 1;
}

/* 堆叠式流量柱 — 请求/缓存命中/WAF拦截 */
.chart-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  border-radius: 3px 3px 0 0;
  overflow: hidden;
  opacity: 0.75;
  transition: opacity 0.2s ease;
}

.chart-col:hover {
  opacity: 1;
}

.chart-seg {
  width: 100%;
  min-height: 0;
}

.chart-seg.requests { background: var(--accent); }
.chart-seg.cache-hits { background: var(--accent-green); }
.chart-seg.waf-blocks { background: var(--accent-red); }

/* ============================================================
   Agent 决策链展示
   ============================================================ */
.decision-chain {
  position: relative;
  padding-left: 2rem;
}

.decision-chain::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.chain-step {
  position: relative;
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-left: 1rem;
}

.chain-step::before {
  content: '';
  position: absolute;
  left: -1.55rem;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-primary);
}

.chain-step.observer::before { background: var(--accent); }
.chain-step.strategist::before { background: var(--accent-purple); }
.chain-step.executor::before { background: var(--accent-green); }

.chain-step .agent-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.chain-step.observer .agent-tag { color: var(--accent); }
.chain-step.strategist .agent-tag { color: var(--accent-purple); }
.chain-step.executor .agent-tag { color: var(--accent-green); }

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse { animation: pulse 2s ease-in-out infinite; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spinning { animation: spin 1s linear infinite; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .hero .hero-stats { flex-direction: column; gap: 1rem; }
  nav .nav-links { gap: 1rem; }
  nav .nav-links a { font-size: 0.8rem; }
  .container { padding: 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
}