* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --accent: #333333;
  --accent-soft: #fafafa;
  --heading-color: #222;
  --divider: #bbb;
  --sub-border: #ddd;
  --focus: #666;
  --btn-bg: #333;
  --btn-hover: #555;
  --btn-text: #fff;
  --item-border: #eee;
  --time-color: #666666;
  --sidebar-width: 280px;
  --sidebar-collapsed: 50px;
  --sidebar-active-bg: #f0f6ff;
  --sidebar-active-border: #1a73e8;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}

/* ── 左侧边栏 ── */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: #fff;
  border-right: 1px solid #e0e0e0;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  box-shadow: 2px 0 8px rgba(0,0,0,0.05);
}
.sidebar.collapsed { width: var(--sidebar-collapsed); min-width: var(--sidebar-collapsed); }
.sidebar.collapsed .sidebar-section-title,
.sidebar.collapsed .sidebar-record-list,
.sidebar.collapsed .sidebar-footer { display: none; }

.sidebar-toggle { display: flex; align-items: center; }
.sidebar-toggle button {
  background: none; border: 1px solid #ddd; font-size: 16px; cursor: pointer;
  padding: 4px 8px; border-radius: 4px; transition: all 0.2s; color: #888;
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; line-height: 1;
}
.sidebar-toggle button:hover { background: #f5f5f5; color: #333; border-color: #ccc; }

.sidebar-header {
  padding: 15px; border-bottom: 1px solid #eee; font-weight: bold; font-size: 16px;
  color: var(--heading-color); display: flex; align-items: center; justify-content: space-between;
}
.sidebar.collapsed .sidebar-header span { display: none; }
.sidebar.collapsed .sidebar-header { padding: 10px 5px; justify-content: center; }

.sidebar-actions {
  padding: 15px; border-bottom: 1px solid #eee; display: flex; flex-direction: column; gap: 8px;
}
.sidebar.collapsed .sidebar-actions { padding: 10px 5px; }
.sidebar-btn {
  padding: 10px 15px; border: none; border-radius: 6px; font-size: 14px;
  cursor: pointer; transition: all 0.2s; text-align: left;
  display: flex; align-items: center; gap: 8px; white-space: nowrap;
}
.sidebar-btn span.icon { font-size: 16px; flex-shrink: 0; }
.sidebar.collapsed .sidebar-btn { justify-content: center; padding: 10px; flex-direction: column; gap: 0; min-height: 40px; }
.sidebar.collapsed .sidebar-btn .btn-text { display: none; }
.sidebar.collapsed .sidebar-btn .icon { font-size: 20px; }
.sidebar-btn-primary { background: var(--btn-bg); color: var(--btn-text); }
.sidebar-btn-primary:hover { background: var(--btn-hover); }
.sidebar-btn-secondary { background: #f0f0f0; color: #333; border: 1px solid #ddd; }
.sidebar-btn-secondary:hover { background: #e8e8e8; }
.sidebar-btn-danger { background: #fff; color: #ff4d4f; border: 1px solid #ff4d4f; }
.sidebar-btn-danger:hover { background: #fff2f0; }

.sidebar-section-title {
  padding: 10px 15px; font-size: 12px; color: #999; text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sidebar-record-list { flex: 1; overflow-y: auto; padding: 0 15px 15px; }
.sidebar-record-item {
  padding: 10px; border: 1px solid #eee; border-radius: 6px; margin-bottom: 8px;
  cursor: pointer; transition: all 0.2s; font-size: 13px; position: relative;
}
.sidebar-record-item:hover { background: #f5f5f5; border-color: #ddd; }
.sidebar-record-item.active { background: var(--sidebar-active-bg); border-color: var(--sidebar-active-border); }
.sidebar-record-item .record-name { font-weight: 600; color: #333; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-record-item .record-meta { font-size: 11px; color: #999; margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-record-item::after {
  content: '点击加载'; position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  font-size: 11px; color: #ccc; opacity: 0; transition: opacity 0.2s;
}
.sidebar-record-item:hover::after { opacity: 1; }
.sidebar-record-item.active::after { content: '当前'; color: var(--sidebar-active-border); opacity: 1; }
.sidebar-record-list::-webkit-scrollbar { width: 4px; }
.sidebar-record-list::-webkit-scrollbar-track { background: transparent; }
.sidebar-record-list::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }
.sidebar-record-list::-webkit-scrollbar-thumb:hover { background: #bbb; }

.sidebar-footer {
  padding: 15px; border-top: 1px solid #eee; font-size: 12px; color: #999; text-align: center;
}
/* 收起状态下的管理入口 */
.sidebar-manage-btn {
  padding: 12px 5px; border-top: 1px solid #eee; text-align: center;
  cursor: pointer; color: #999; font-size: 13px;
  transition: color 0.2s, background 0.2s; display: none;
  flex-direction: column; align-items: center; gap: 4px;
}
.sidebar-manage-btn:hover { color: #333; background: #f5f5f5; }
.sidebar-manage-btn .manage-text { font-size: 11px; }
.sidebar.collapsed .sidebar-manage-btn { display: flex; }

/* ── 弹窗 ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.35);
  display: none; align-items: center; justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: #fff; border-radius: 12px; padding: 28px 24px 20px;
  width: 320px; box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.92) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-icon { font-size: 32px; }
.modal-title { font-size: 16px; font-weight: bold; color: #222; }
.modal-body  { font-size: 14px; color: #666; text-align: center; line-height: 1.6; }
.modal-footer { display: flex; gap: 10px; margin-top: 6px; }
.modal-footer .btn { min-width: 80px; }
.btn-cancel { background: #f0f0f0; color: #555; }
.btn-cancel:hover { background: #e4e4e4; }
.btn-danger  { background: #ff4d4f; color: #fff; }
.btn-danger:hover { background: #e04345; }

/* ── 主内容区 ── */
.main-content {
  flex: 1; margin-left: var(--sidebar-width); padding: 20px;
  transition: margin-left 0.3s ease; min-width: 0;
}
.main-content.expanded { margin-left: var(--sidebar-collapsed); }
.container { max-width: 960px; margin: 0 auto; padding: 20px; }

/* ── 表单区块 ── */
.section {
  background: #fff; border-radius: 8px; padding: 20px; margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.section h2 {
  font-size: 18px; margin-bottom: 15px; padding-bottom: 8px;
  border-bottom: 2px solid var(--accent); color: var(--heading-color);
}
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 14px; color: #555; margin-bottom: 4px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px;
  font-size: 14px; font-family: inherit;
}
.field textarea { resize: vertical; min-height: 80px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--focus); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.dynamic-list { margin-top: 10px; }
.dynamic-item {
  background: var(--accent-soft); border: 1px solid var(--item-border);
  border-radius: 4px; padding: 12px; margin-bottom: 10px;
}
.dynamic-item + .dynamic-item { border-top: 2px solid var(--divider); border-radius: 4px; }
.dynamic-item .field { margin-bottom: 8px; }
.hint { font-size: 12px; color: #999; margin-top: 4px; }
.sub-header {
  font-size: 14px; font-weight: bold; color: #333; margin: 18px 0 10px;
  padding-bottom: 6px; border-bottom: 1px solid var(--sub-border);
}
.btn {
  padding: 8px 16px; border: none; border-radius: 4px; cursor: pointer;
  font-size: 14px; transition: background 0.2s;
}
.btn-add { background: #f0f0f0; color: #333; border: 1px dashed #ccc; width: 100%; margin-top: 10px; }
.btn-add:hover { background: #e8e8e8; }
.btn-remove { background: #ff4d4f; color: #fff; padding: 4px 10px; font-size: 12px; }
.btn-remove:hover { background: #ff7875; }