/* ===== 全局变量 ===== */
:root {
  --primary: #1890ff;
  --primary-light: #40a9ff;
  --primary-dark: #096dd9;
  --primary-bg: rgba(24, 144, 255, 0.06);
  --accent: #f7a84f;
  --success: #34c759;
  --success-bg: #e8f9ee;
  --danger: #ff3b30;
  --danger-bg: #feecec;
  --info-bg: #e6f7ff;

  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #8c8c8c;
  --text-on-primary: #fff;

  --bg-body: #f5f5f5;
  --bg-card: #ffffff;
  --bg-sidebar: #ffffff;
  --bg-sidebar-hover: #f0f0f0;
  --bg-sidebar-active: #e6f7ff;

  --border-light: #d9d9d9;
  --border-card: #d9d9d9;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.18);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.18);
  --shadow-focus: 0 0 0 3px rgba(24, 144, 255, 0.18);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --sidebar-width: 220px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

.sidebar-divider {
  margin: 8px 12px;
  border-top: 1px solid var(--border-light);
}

/* ===== 基础重置 ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei UI', sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
}

/* ===== 布局骨架 ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 10;
}

.sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid #d9d9d9;
}

.sidebar-logo {
  max-width: 140px;
  height: auto;
  display: block;
  margin: 0 auto;
  transition: opacity var(--transition-normal);
}

.sidebar-menu {
  list-style: none;
  padding: 12px 10px;
  flex: 1;
}

.sidebar-menu li {
  margin: 2px 0;
}

.sidebar-menu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  color: #666;
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.3px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.sidebar-menu li a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--primary);
  border-radius: 2px;
  transition: height var(--transition-normal);
}

.sidebar-menu li a:hover {
  background: var(--bg-sidebar-hover);
  color: var(--primary);
}

.sidebar-menu li a.active {
  background: var(--bg-sidebar-active);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-menu li a.active::before {
  height: 20px;
}

.sidebar-menu li a.menu-placeholder {
  color: #999;
  cursor: default;
}

.sidebar-menu li a.menu-placeholder:hover {
  background: #f0f0f0;
  color: #888;
}

/* 子菜单样式 */
.menu-group {
  position: relative;
}

.menu-toggle {
  justify-content: space-between;
}

.menu-arrow {
  margin-left: auto;
  transition: transform 0.3s ease;
  opacity: 0.5;
}

.menu-toggle:hover .menu-arrow {
  opacity: 0.8;
}

.menu-toggle.expanded .menu-arrow {
  transform: rotate(180deg);
}

.submenu {
  list-style: none;
  padding: 0;
  margin: 4px 0 0 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: rgba(0, 0, 0, 0.02);
  border-radius: var(--radius-sm);
}

.submenu.expanded {
  max-height: 500px;
}

.submenu li a {
  padding: 9px 14px 9px 42px;
  font-size: 13px;
  color: #777;
}

.submenu li a:hover {
  color: var(--primary);
  background: rgba(24, 144, 255, 0.05);
}

.submenu li a::before {
  display: none;
}

/* 侧边栏菜单图标 */
.menu-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.55;
}

.sidebar-menu li a.active .menu-icon {
  opacity: 1;
}

/* ===== 主内容区 ===== */
.app-main {
  flex: 1;
  padding: 28px 32px;
  overflow-y: auto;
  background: var(--bg-body);
  min-width: 0;
}

/* ===== 页面切换 ===== */
.page-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 占位页面 ===== */
.placeholder-page {
  text-align: center;
  padding: 100px 20px;
}

.placeholder-icon-box {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: var(--primary-bg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-icon-box svg {
  width: 32px;
  height: 32px;
  stroke: var(--primary);
  fill: none;
}

.placeholder-page h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.placeholder-page p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 页面标题 ===== */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.page-header p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 查询控制区 ===== */
.control-panel {
  margin-bottom: 20px;
}

.query-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

.query-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.date-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.date-group label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  letter-spacing: 0.2px;
}

.date-input {
  padding: 8px 12px;
  font-size: 13px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  outline: none;
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: inherit;
  transition: all var(--transition-fast);
  width: 150px;
}

.date-input:focus {
  border-color: var(--primary);
  box-shadow: var(--shadow-focus);
  background: #fff;
}

.query-bar .btn-primary {
  flex-shrink: 0;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  font-size: 13px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: var(--text-on-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-light);
  box-shadow: 0 2px 8px rgba(24, 144, 255, 0.3);
}

.btn-primary .btn-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* 小按钮 */
.btn-small {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.btn-download {
  background: var(--primary);
  color: var(--text-on-primary);
}

.btn-download:hover:not(:disabled) {
  background: var(--primary-light);
  box-shadow: 0 2px 8px rgba(24, 144, 255, 0.3);
}

.btn-download:active:not(:disabled) {
  transform: scale(0.97);
}

/* ===== 状态提示 ===== */
.status-message {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  display: none;
  font-weight: 500;
}

.status-message.success {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--success-bg);
  border: 1px solid rgba(52, 199, 89, 0.2);
  color: #1a7d36;
}

.status-message.error {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--danger-bg);
  border: 1px solid rgba(255, 59, 48, 0.2);
  color: #c41230;
}

.status-message.loading {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--info-bg);
  border: 1px solid rgba(24, 144, 255, 0.15);
  color: var(--primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-message.success .status-dot { background: var(--success); }
.status-message.error .status-dot { background: var(--danger); }
.status-message.loading .status-dot {
  background: var(--primary);
  animation: pulse 1.2s ease infinite;
}

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

/* ===== 数据列表 ===== */
.data-section {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.data-section-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.data-section-header h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.record-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-body);
  padding: 3px 10px;
  border-radius: 20px;
}

.records-list {
  min-height: 180px;
  padding: 16px 24px;
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 48px 20px;
}

.empty-state .empty-icon-box {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  background: var(--bg-body);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state .empty-icon-box svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 1.5;
}

.empty-state p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 记录卡片 ===== */
.record-card {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 8px;
  transition: all var(--transition-fast);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: #fff;
}

.record-card:last-child {
  margin-bottom: 0;
}

.record-card:hover {
  border-color: rgba(24, 144, 255, 0.25);
  background: rgba(24, 144, 255, 0.02);
}

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

.record-info h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.record-meta {
  display: flex;
  gap: 4px 20px;
  flex-wrap: wrap;
}

.record-meta-item {
  font-size: 12.5px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 2px;
}

.meta-label {
  color: var(--text-muted);
  font-weight: 500;
}

.record-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ===== 加载旋转 ===== */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }

  .app-sidebar {
    width: 100%;
    border-right: none;
  }

  .sidebar-brand {
    padding: 12px 16px;
    border-bottom: 1px solid #d9d9d9;
  }

  .sidebar-menu {
    display: flex;
    flex-wrap: wrap;
    padding: 8px 12px;
    gap: 4px;
  }

  .sidebar-menu li {
    margin: 0;
  }

  .sidebar-menu li a {
    padding: 8px 12px;
    font-size: 13px;
  }

  .sidebar-menu li a::before {
    display: none;
  }

  .app-main {
    padding: 16px;
  }

  .query-bar {
    flex-wrap: wrap;
  }

  .date-input {
    width: 130px;
  }

  .record-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .record-actions {
    align-self: flex-end;
  }
}