* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #2c3e50;
  --text2: #666;
  --text3: #999;
  --primary: #FF6B6B;
  --primary-hover: #e55a5a;
  --accent: #4ecdc4;
  --border: #e8e8e8;
  --input-bg: #fff;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --hover: #f0f0f5;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info-bg: #e8f4f8;
  --info-border: #bce8f1;
  --preview-bg: #f8f9fa;
  --premium-bg: #fff8e1;
  --premium-border: #ffc107;
  --step-bg: #eee;
  --step-text: #999;
  --step-active-bg: #FF6B6B;
  --step-active-text: #fff;
  --step-done-bg: #d4edda;
  --step-done-text: #155724;
  --table-bg: #fff;
  --table-alt: #f9f9f9;
  --table-border: #e0e0e0;
  --scrollbar: #ccc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f1a;
    --card: #1a1a2e;
    --text: #e0e0e0;
    --text2: #aaa;
    --text3: #666;
    --primary: #FF6B6B;
    --primary-hover: #e55a5a;
    --accent: #4ecdc4;
    --border: #2a2a3e;
    --input-bg: #222238;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --hover: #222238;
    --success: #4caf50;
    --warning: #ff9800;
    --danger: #f44336;
    --info-bg: #1a2a3e;
    --info-border: #2a4a5e;
    --preview-bg: #16213e;
    --premium-bg: #2a2a1a;
    --premium-border: #ffc107;
    --step-bg: #333;
    --step-text: #888;
    --step-active-bg: #FF6B6B;
    --step-active-text: #fff;
    --step-done-bg: #1a3a2a;
    --step-done-text: #8bc34a;
    --table-bg: #1a1a2e;
    --table-alt: #1e1e38;
    --table-border: #2a2a3e;
    --scrollbar: #444;
  }
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; padding: 0 20px 20px; }
.container { width: 100%; max-width: 800px; margin: 0 auto; }
.header { text-align: center; margin-bottom: 16px; }
.header h1 { font-size: 2.5rem; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.header p { color: var(--text2); font-size: 0.9rem; }
.steps { display: flex; justify-content: center; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.step { padding: 4px 16px; border-radius: 20px; background: var(--step-bg); color: var(--step-text); font-size: 0.8rem; transition: all 0.3s; }
.step.active { background: var(--step-active-bg); color: var(--step-active-text); font-weight: bold; }
.step.done { background: var(--step-done-bg); color: var(--step-done-text); }
.card { background: var(--card); border-radius: 12px; padding: 24px; box-shadow: var(--shadow); margin-bottom: 16px; }
.card h2 { font-size: 1.2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.05rem; margin-bottom: 12px; }
.divider { height: 1px; background: var(--border); margin: 16px 0; }
label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem; }
label .sub { font-weight: 400; color: var(--text2); font-size: 0.8rem; }
input[type="text"], input[type="password"], textarea, select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--input-bg); color: var(--text); font-size: 0.95rem; outline: none;
  transition: border-color 0.2s;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 72px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px; border: none; border-radius: 8px; font-size: 1rem;
  font-weight: 600; cursor: pointer; transition: all 0.2s; text-decoration: none;
  width: 100%; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(255,107,107,0.3); }
.btn-primary:disabled { background: #888; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-secondary { background: var(--hover); color: var(--text); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }
.btn-group { display: flex; gap: 8px; }
.btn-group .btn { flex: 1; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .row2, .row3 { grid-template-columns: 1fr; } }
.slider-container { margin: 12px 0; }
.slider-value { text-align: center; font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-top: 4px; }
.slider-labels { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--text2); margin-top: 2px; }
input[type="range"] { -webkit-appearance: none; width: 100%; height: 6px; border-radius: 3px; background: var(--border); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--primary); cursor: pointer; border: 2px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.2); }
.search-input { width: 100%; }
.stock-list { max-height: 300px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; margin-top: 8px; }
.stock-list::-webkit-scrollbar { width: 6px; }
.stock-list::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
.stock-item { display: flex; align-items: center; padding: 8px 12px; cursor: pointer; transition: background 0.15s; border-bottom: 1px solid var(--border); }
.stock-item:last-child { border-bottom: none; }
.stock-item:hover { background: var(--hover); }
.stock-item.selected { background: var(--primary); color: #fff; }
.stock-item input[type="checkbox"] { margin-right: 10px; accent-color: var(--primary); width: 16px; height: 16px; }
.stock-code { font-size: 0.8rem; color: var(--text3); margin-left: auto; }
.stock-item.selected .stock-code { color: rgba(255,255,255,0.7); }
.selected-badge { display: inline-flex; align-items: center; gap: 4px;
  background: var(--primary); color: #fff; padding: 4px 10px;
  border-radius: 16px; font-size: 0.8rem; margin: 3px; }
.selected-badge .remove { cursor: pointer; font-weight: bold; margin-left: 2px; opacity: 0.7; }
.selected-badge .remove:hover { opacity: 1; }
.selected-tags { display: flex; flex-wrap: wrap; margin-top: 8px; min-height: 32px; }
.custom-input-row { display: flex; gap: 8px; margin-top: 8px; }
.custom-input-row input { flex: 1; }
.custom-input-row button { width: auto; padding: 10px 16px; white-space: nowrap; }
.preview-box { background: var(--preview-bg); border-radius: 10px; padding: 20px; border-left: 4px solid var(--primary); margin-bottom: 12px; }
.premium-box { background: var(--premium-bg); border-radius: 10px; padding: 20px; border-left: 4px solid var(--premium-border); margin-bottom: 12px; }
.caption { color: var(--text2); font-size: 0.82rem; margin-top: 4px; }
.warning { background: #fff3cd; color: #856404; border-radius: 8px; padding: 12px 16px; margin-top: 12px; font-size: 0.9rem; border: 1px solid #ffeeba; }
@media (prefers-color-scheme: dark) { .warning { background: #3a3a1a; color: #ffc107; border-color: #5a5a2a; } }
.error { background: #f8d7da; color: #721c24; border-radius: 8px; padding: 12px 16px; margin-top: 12px; font-size: 0.9rem; border: 1px solid #f5c6cb; }
@media (prefers-color-scheme: dark) { .error { background: #3a1a1a; color: #f44336; border-color: #5a2a2a; } }
.success-msg { background: #d4edda; color: #155724; border-radius: 8px; padding: 12px 16px; margin-top: 12px; font-size: 0.9rem; border: 1px solid #c3e6cb; }
@media (prefers-color-scheme: dark) { .success-msg { background: #1a3a1a; color: #4caf50; border-color: #2a5a2a; } }
.info { background: var(--info-bg); border: 1px solid var(--info-border); border-radius: 8px; padding: 12px 16px; font-size: 0.9rem; color: var(--text); }
.metric-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 8px; margin: 12px 0; }
.metric { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 10px; text-align: center; }
.metric label { font-size: 0.75rem; font-weight: 400; color: var(--text2); margin-bottom: 2px; }
.metric .value { font-size: 1.1rem; font-weight: 700; }
.metric .value.green { color: var(--success); }
.metric .value.red { color: var(--danger); }
.trade-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; margin-top: 8px; }
.trade-table th { background: var(--hover); padding: 6px 8px; text-align: left; border-bottom: 2px solid var(--border); }
.trade-table td { padding: 6px 8px; border-bottom: 1px solid var(--border); }
.trade-table tr:nth-child(even) { background: var(--table-alt); }
.trade-table .profit { color: var(--danger); }
.trade-table .loss { color: var(--success); }
.loading { display: flex; flex-direction: column; align-items: center; padding: 40px; color: var(--text2); }
.spinner { width: 40px; height: 40px; border: 4px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin-bottom: 12px; }
@keyframes spin { to { transform: rotate(360deg); } }
.footer { text-align: center; color: var(--text3); font-size: 0.78rem; margin-top: 32px; padding: 20px 0; border-top: 1px solid var(--border); }
.hidden { display: none !important; }
.page-content { display: none; }
.page-content.active { display: block; }
.buy-rules, .sell-rules { margin: 8px 0; }
.buy-rules li, .sell-rules li { margin: 4px 0; padding-left: 4px; list-style: none; }
.buy-rules li::before { content: "✅ "; }
.sell-rules li::before { content: "❌ "; }
.strategy-title { font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.param-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin-top: 8px; }
.param-table th, .param-table td { padding: 6px 8px; border: 1px solid var(--border); text-align: center; }
.param-table th { background: var(--hover); }
.download-link { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; background: var(--primary); color: #fff; text-decoration: none; font-weight: 600; font-size: 0.9rem; cursor: pointer; border: none; }
.download-link:hover { background: var(--primary-hover); }
/* ===== 全站返回导航栏（顶部通栏，融入深色主题） ===== */
.site-nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  margin: 0 -20px 16px;            /* 抵消 body 左右 padding，通栏到屏幕边缘 */
  box-shadow: 0 2px 10px rgba(0,0,0,0.25);
}
.site-nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.site-nav-home {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--primary);
  background: rgba(255,107,107,0.12);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 8px;
  white-space: nowrap;
  transition: all 0.2s;
}
.site-nav-home:hover { background: rgba(255,107,107,0.22); }
.site-nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav-links::-webkit-scrollbar { display: none; }
.site-nav-links a {
  color: #c9c9dc;
  text-decoration: none;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  transition: all 0.2s;
}
.site-nav-links a:hover {
  background: var(--hover);
  color: #ffffff;
}
@media (prefers-color-scheme: light) {
  .site-nav-links a { color: #555; }
  .site-nav-links a:hover { color: var(--primary); }
}
@media (max-width: 600px) {
  .site-nav-inner { padding: 0 12px; min-height: 44px; gap: 8px; }
  .site-nav-home { font-size: 13px; padding: 5px 10px; }
  .site-nav-links a { font-size: 12px; padding: 5px 8px; }
}