/* ==================== 全局样式 ==================== */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a1f2e;
  --bg-card-hover: #1e2438;
  --bg-input: #0d1117;
  --border-color: #1e2a3a;
  --border-hover: #2a3a50;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-green: #00d4aa;
  --accent-green-dark: #00b894;
  --accent-red: #ef4444;
  --accent-red-dark: #dc2626;
  --accent-blue: #3b82f6;
  --accent-blue-dark: #2563eb;
  --accent-yellow: #f59e0b;
  --accent-purple: #8b5cf6;
  --gradient-1: linear-gradient(135deg, #00d4aa, #3b82f6);
  --gradient-2: linear-gradient(135deg, #8b5cf6, #ec4899);
  --gradient-3: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-bg: linear-gradient(180deg, #0a0e17 0%, #111827 50%, #1a1f2e 100%);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.5);
  --shadow-glow-green: 0 0 20px rgba(0,212,170,0.15);
  --shadow-glow-blue: 0 0 20px rgba(59,130,246,0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--gradient-bg);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-green); text-decoration: none; transition: all 0.2s; }
a:hover { color: var(--accent-green-dark); }

/* ==================== 导航栏 ==================== */
.navbar {
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 24px;
}

.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: all 0.2s;
}

.nav-links a:hover { color: var(--text-primary); background: var(--bg-card); }

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-1);
  color: #000;
  box-shadow: var(--shadow-glow-green);
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); color: #000; }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }

.btn-danger {
  background: var(--accent-red);
  color: #fff;
}
.btn-danger:hover { background: var(--accent-red-dark); }

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-xs { padding: 4px 10px; font-size: 12px; }

/* ==================== 布局 ==================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 60px 0;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
}

/* ==================== Hero 区域 ==================== */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0,212,170,0.1);
  border: 1px solid rgba(0,212,170,0.3);
  border-radius: 50px;
  font-size: 13px;
  color: var(--accent-green);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 40px 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}

.stat-card:hover {
  border-color: var(--accent-green);
  box-shadow: var(--shadow-glow-green);
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.stat-card.red .stat-value { background: var(--gradient-3); -webkit-background-clip: text; }
.stat-card.blue .stat-value { background: linear-gradient(135deg, #3b82f6, #60a5fa); -webkit-background-clip: text; }
.stat-card.purple .stat-value { background: var(--gradient-2); -webkit-background-clip: text; }

/* ==================== 卡片 ==================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.2s;
}

.card:hover {
  border-color: var(--border-hover);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title .icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.icon-green { background: rgba(0,212,170,0.15); color: var(--accent-green); }
.icon-blue { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.icon-purple { background: rgba(139,92,246,0.15); color: var(--accent-purple); }
.icon-red { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.icon-yellow { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }

/* ==================== 表格 ==================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead {
  background: var(--bg-secondary);
}

th {
  text-align: left;
  padding: 14px 16px;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

td {
  padding: 14px 16px;
  border-top: 1px solid var(--border-color);
  white-space: nowrap;
}

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

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: rgba(0,212,170,0.15); color: var(--accent-green); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.badge-purple { background: rgba(139,92,246,0.15); color: var(--accent-purple); }

/* ==================== 表单 ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input, .form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s;
  font-family: inherit;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(0,212,170,0.1);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.form-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ==================== Tab 切换 ==================== */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.tab-btn {
  padding: 10px 20px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
}

.tab-btn:hover:not(.active) {
  color: var(--text-secondary);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ==================== 提示消息 ==================== */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  z-index: 9999;
  animation: slideIn 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.toast-success { background: #065f46; color: #6ee7b7; border: 1px solid #059669; }
.toast-error { background: #7f1d1d; color: #fca5a5; border: 1px solid #dc2626; }
.toast-info { background: #1e3a5f; color: #93c5fd; border: 1px solid #2563eb; }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ==================== 信号卡片 ==================== */
.signal-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 20px;
}

.signal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s;
}

.signal-card.long { border-left: 3px solid var(--accent-green); }
.signal-card.short { border-left: 3px solid var(--accent-red); }

.signal-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.signal-symbol {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 4px;
}

.signal-direction {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.signal-direction.long { background: rgba(0,212,170,0.15); color: var(--accent-green); }
.signal-direction.short { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.signal-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.signal-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.signal-detail .label {
  font-size: 12px;
  color: var(--text-muted);
}

.signal-detail .value {
  font-size: 16px;
  font-weight: 700;
}

/* ==================== 策略参数展示 ==================== */
.strategy-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 40px 0;
}

.strategy-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.strategy-item {
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  text-align: center;
}

.strategy-item .s-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.strategy-item .s-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-green);
}

/* ==================== 模态框 ==================== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 90%;
  max-width: 560px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
}
.modal-close:hover { color: var(--text-primary); }

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ==================== 登录页 ==================== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

.login-card h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.login-card .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
}

/* ==================== 仪表板 ==================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.dashboard-full { grid-column: 1 / -1; }

.capital-display {
  text-align: center;
  padding: 32px;
}

.capital-display .amount {
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.capital-display .label {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.capital-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.capital-metric {
  text-align: center;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.capital-metric .m-value {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.capital-metric .m-label {
  font-size: 12px;
  color: var(--text-muted);
}

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

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 15px; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .capital-metrics { grid-template-columns: repeat(2, 1fr); }
  .signal-cards { grid-template-columns: 1fr; }
  .strategy-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .navbar-inner { padding: 0 12px; }
  .nav-links { display: none; }
}

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ==================== 加载动画 ==================== */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

.loading {
  text-align: center;
  padding: 32px;
  color: var(--text-muted);
}

/* ==================== 代码块 ==================== */
.code-display {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
  font-size: 18px;
  letter-spacing: 2px;
  color: var(--accent-green);
  text-align: center;
  cursor: pointer;
  user-select: all;
}

/* ==================== 用户标签 ==================== */
.user-email {
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logout-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}
.logout-btn:hover { border-color: var(--accent-red); color: var(--accent-red); }

/* ==================== 盈利标记 ==================== */
.profit { color: var(--accent-green); font-weight: 600; }
.loss { color: var(--accent-red); font-weight: 600; }

/* ==================== 策略流程展示 ==================== */
.flow-steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 32px 0;
  overflow-x: auto;
  padding: 8px 0;
}

.flow-step {
  flex: 0 0 auto;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  min-width: 160px;
}

.flow-arrow {
  flex: 0 0 auto;
  padding: 0 12px;
  color: var(--accent-green);
  font-size: 24px;
}

.flow-step .step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--gradient-1);
  color: #000;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}

.flow-step .step-text {
  font-size: 13px;
  color: var(--text-secondary);
}

.flow-step .step-highlight {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-green);
  margin-top: 4px;
}

/* ==================== 双栏布局 ==================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; }
}