/* ========== 基础 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #0081ff;
  --primary-dark: #006ddb;
  --bg: #f0f2f5;
  --card: #ffffff;
  --text: #1a1a1a;
  --text-2: #666666;
  --text-3: #999999;
  --border: #e0e0e0;
  --success: #52c41a;
  --warning: #faad14;
  --danger: #ff4d4f;
  --radius: 8px;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* ========== Screen 切换 ========== */
.screen { display: none; }
.screen.active { display: block; }

/* ========== 登录页 ========== */
#login-screen {
  min-height: 100vh;
  display: none;
  align-items: center;
  justify-content: center;
}
#login-screen.active { display: flex; }
.login-card {
  background: var(--card);
  padding: 48px 40px;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,.08);
  width: 360px;
  text-align: center;
}
.login-logo { font-size: 48px; margin-bottom: 12px; }
.login-card h1 { font-size: 20px; margin-bottom: 8px; }
.login-sub { color: var(--text-3); margin-bottom: 24px; }
.login-card input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  margin-bottom: 16px;
  outline: none;
  transition: border-color .2s;
}
.login-card input:focus { border-color: var(--primary); }
.error-text { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }

/* ========== 按钮 ========== */
.btn-primary, .btn-default, .btn-text, .btn-small {
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  padding: 10px 20px;
  transition: all .15s;
  font-family: inherit;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: #ccc; cursor: not-allowed; }
.btn-default {
  background: #f5f5f5;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-default:hover { background: #e8e8e8; }
.btn-text {
  background: transparent;
  color: var(--text-2);
  padding: 6px 12px;
}
.btn-text:hover { color: var(--danger); }
.btn-small {
  background: #f0f5ff;
  color: var(--primary);
  padding: 6px 12px;
  font-size: 13px;
}
.btn-small:hover { background: #d6e8ff; }
.btn-block { width: 100%; }
.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 4px 10px;
  font-size: 13px;
  border-radius: 4px;
  cursor: pointer;
}
.btn-danger:hover { background: var(--danger); color: #fff; }

/* ========== 顶栏 ========== */
.topbar {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.topbar-left { display: flex; align-items: center; gap: 8px; font-size: 16px; font-weight: 600; }
.topbar-logo { font-size: 22px; }

/* ========== Tabs ========== */
.tabs {
  background: var(--card);
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 56px;
  z-index: 99;
}
.tab {
  padding: 14px 24px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 15px;
  color: var(--text-2);
  border-bottom: 3px solid transparent;
  transition: all .2s;
  font-family: inherit;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ========== 内容区 ========== */
.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}
.tab-content { display: none; }
.tab-content.active { display: block; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-header h2 { font-size: 18px; }

/* ========== 卡片 ========== */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.card h3 { font-size: 16px; margin-bottom: 16px; }
.hidden { display: none !important; }

/* ========== 表单 ========== */
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 14px;
}
.req { color: var(--danger); }
.hint { color: var(--text-3); font-size: 12px; margin-top: 4px; }
.form-row input[type="text"],
.form-row input[type="number"],
.form-row input[type="password"],
.form-row input[type="file"],
.form-row textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
  font-family: inherit;
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--primary); }
.form-row textarea { resize: vertical; }
.form-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 20px; }
.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-weight: normal !important;
}
.checkbox-label input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; }
.radio-group { display: flex; gap: 20px; flex-wrap: wrap; }
.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-weight: normal !important;
}
.radio-label input { cursor: pointer; }
.content-toolbar { display: flex; gap: 8px; margin-top: 8px; }
.size-input-group { display: flex; align-items: center; gap: 10px; }
.size-input-group input { width: 120px !important; }
.size-x { color: var(--text-3); font-size: 16px; }

/* ========== 版本列表 ========== */
.version-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.version-info { flex: 1; }
.version-name {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.version-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: normal;
}
.tag-latest { background: #e6f7ff; color: var(--primary); }
.tag-force { background: #fff1f0; color: var(--danger); }
.version-meta { color: var(--text-3); font-size: 12px; margin-top: 4px; }
.version-notes {
  color: var(--text-2);
  font-size: 13px;
  margin-top: 8px;
  white-space: pre-wrap;
  background: #fafafa;
  padding: 8px 12px;
  border-radius: 4px;
}
.version-actions { display: flex; gap: 8px; flex-shrink: 0; margin-left: 16px; }

/* ========== 弹窗列表 ========== */
.popup-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.popup-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.popup-item-title { font-size: 15px; font-weight: 600; }
.popup-item-meta { color: var(--text-3); font-size: 12px; margin-top: 4px; }
.popup-item-actions { display: flex; gap: 8px; }

/* ========== 预览 ========== */
.preview-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,.5);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview-box {
  background: #fff;
  border-radius: 12px;
  max-width: 400px;
  width: 90%;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.preview-title {
  padding: 16px 20px;
  font-size: 18px;
  font-weight: bold;
  border-bottom: 1px solid #eee;
}
.preview-content {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}
.preview-footer {
  padding: 12px 20px;
  border-top: 1px solid #eee;
  text-align: center;
}

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.8);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 10000;
  transition: opacity .3s;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* ========== 空状态 ========== */
.empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-3);
}

/* ========== 响应式 ========== */
@media (max-width: 600px) {
  .content { padding: 16px; }
  .card { padding: 16px; }
  .version-item { flex-direction: column; align-items: flex-start; }
  .version-actions { margin-left: 0; margin-top: 12px; }
  .radio-group { flex-direction: column; gap: 8px; }
}