/* ===== 基础 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f7fa;
  color: #2c3e50;
  line-height: 1.5;
}
body { padding: 0; min-height: 100vh; }
a { color: #1976d2; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 顶部导航 ===== */
.nav {
  background: linear-gradient(90deg, #1e3c72, #2a5298);
  color: #fff;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.nav .logo {
  font-size: 20px;
  font-weight: 700;
  margin-right: 24px;
}
.nav a {
  color: rgba(255,255,255,0.85);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.2s;
}
.nav a:hover { background: rgba(255,255,255,0.15); text-decoration: none; }
.nav a.active { background: rgba(255,255,255,0.2); color: #fff; }

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 32px;
}
h1 { font-size: 24px; margin-bottom: 16px; }
h2 { font-size: 18px; margin: 24px 0 12px; color: #555; }

/* ===== 卡片 ===== */
.card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  margin-bottom: 16px;
}
.card-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }

/* ===== 统计指标 ===== */
.metric {
  text-align: left;
  padding: 16px;
  background: #f8f9fb;
  border-radius: 8px;
  border-left: 4px solid #1976d2;
}
.metric .label { font-size: 12px; color: #888; margin-bottom: 4px; }
.metric .value { font-size: 22px; font-weight: 700; }
.metric .value.pos { color: #e74c3c; }  /* A 股习惯: 红涨绿跌 */
.metric .value.neg { color: #27ae60; }
.metric.green { border-left-color: #27ae60; }
.metric.red { border-left-color: #e74c3c; }

/* ===== 表格 ===== */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid #eee; }
th { background: #f8f9fb; font-weight: 600; color: #666; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: #fafbfc; }
td.num { text-align: right; font-family: 'Courier New', monospace; }
td.pos { color: #e74c3c; }
td.neg { color: #27ae60; }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background: #1976d2;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}
.btn:hover { background: #1565c0; }
.btn-secondary { background: #95a5a6; }
.btn-danger { background: #e74c3c; }
.btn-danger:hover { background: #c0392b; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn:disabled { background: #bdc3c7; cursor: not-allowed; }

/* ===== 表单 ===== */
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 12px; }
.form-group { display: flex; flex-direction: column; }
.form-group label { font-size: 12px; color: #666; margin-bottom: 4px; }
.form-group input, .form-group select, .form-group textarea {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
.form-group input:focus, .form-group select:focus { border-color: #1976d2; outline: none; }

/* ===== Tag / 标签 ===== */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  background: #ecf0f1;
  color: #555;
}
.tag.buy { background: #ffe6e6; color: #c0392b; }
.tag.sell { background: #e8f5e9; color: #27ae60; }
.tag.stock { background: #e3f2fd; color: #1976d2; }
.tag.option { background: #f3e5f5; color: #7b1fa2; }
.tag.call { background: #ffebee; color: #c62828; }
.tag.put { background: #e8eaf6; color: #283593; }

/* ===== 空状态 ===== */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: #999;
}
.empty .icon { font-size: 48px; margin-bottom: 12px; }

/* ===== 提示 ===== */
.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert.ok { background: #e8f5e9; color: #2e7d32; border-left: 4px solid #2e7d32; }
.alert.err { background: #ffebee; color: #c62828; border-left: 4px solid #c62828; }
.alert.info { background: #e3f2fd; color: #1565c0; border-left: 4px solid #1976d2; }

/* ===== 过滤栏 ===== */
.filter-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: #fff;
  border-radius: 8px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.filter-bar input, .filter-bar select {
  padding: 6px 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 13px;
}
.filter-bar label { font-size: 12px; color: #666; }

/* ===== 工具栏 ===== */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}