:root {
  /* Colors */
  --lxp-color-primary: #FF6B35;
  --lxp-color-secondary: #2C5F7D;
  --lxp-color-bg: #FAF8F5;
  --lxp-color-text: #333333;
  --lxp-color-text-light: #666666;
  --lxp-color-disabled: #CCCCCC;
  --lxp-color-white: #FFFFFF;
  --lxp-color-success: #4CD964;
  --lxp-color-warning: #FF9500;
  --lxp-color-error: #FF3B30;

  /* Font Sizes */
  --lxp-font-size-sm: 16px;
  --lxp-font-size-base: 18px;
  --lxp-font-size-lg: 20px;
  --lxp-font-size-xl: 24px;
  --lxp-font-size-xxl: 32px;

  /* Spacing */
  --lxp-spacing-xs: 4px;
  --lxp-spacing-sm: 8px;
  --lxp-spacing-md: 16px;
  --lxp-spacing-lg: 24px;
  --lxp-spacing-xl: 32px;

  /* Border Radius */
  --lxp-radius-sm: 4px;
  --lxp-radius-md: 8px;
  --lxp-radius-lg: 16px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--lxp-color-bg);
  color: var(--lxp-color-text);
  margin: 0;
  padding: 0;
  font-size: var(--lxp-font-size-base);
}

.lxp-container {
  padding: var(--lxp-spacing-md);
  max-width: 600px;
  margin: 0 auto;
}

.lxp-mb-sm { margin-bottom: var(--lxp-spacing-sm); }
.lxp-mb-md { margin-bottom: var(--lxp-spacing-md); }
.lxp-ml-sm { margin-left: var(--lxp-spacing-sm); }

.lxp-title {
  font-size: var(--lxp-font-size-xl);
  font-weight: bold;
  color: var(--lxp-color-text);
}

.lxp-subtitle {
  font-size: var(--lxp-font-size-lg);
  font-weight: bold;
  color: var(--lxp-color-text);
}

.lxp-text {
  font-size: var(--lxp-font-size-base);
  color: var(--lxp-color-text);
}

/* ── 全局返回导航 ────────────────────────────────────────── */

/* 浮动圆形返回键 — fixed 定位，叠在顶部（详情页/大图页）
   用 CSS ::before 画箭头，无字符居中问题                  */
.back-fab {
  position: fixed;
  top: 14px;
  left: 14px;
  width: 40px;
  height: 40px;
  background: rgba(0,0,0,0.42);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 9999;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s, transform 0.1s;
  font-size: 0; /* 隐藏任何文字残留 */
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.back-fab::before {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  border-left: 2.5px solid #fff;
  border-bottom: 2.5px solid #fff;
  border-radius: 1px;
  transform: rotate(45deg) translateX(2px);
}
.back-fab:active {
  background: rgba(0,0,0,0.65);
  transform: scale(0.9);
}

/* 顶部导航栏 — sticky 定位，滚动时不消失（列表子页） */
.page-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 11px 0 10px;
  margin-bottom: 12px;
  background: #f8f8f8; /* 与 lxp-container 背景一致 */
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.page-nav .back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  font-size: 0; /* 用 ::before 画箭头 */
}
.page-nav .back-btn::before {
  content: '';
  display: block;
  width: 9px;
  height: 9px;
  border-left: 2px solid var(--lxp-color-text, #333);
  border-bottom: 2px solid var(--lxp-color-text, #333);
  border-radius: 1px;
  transform: rotate(45deg) translateX(1px);
  opacity: 0.65;
}
.page-nav .back-btn:active::before { opacity: 1; }
.page-nav .nav-title {
  font-size: var(--lxp-font-size-xl);
  font-weight: bold;
  color: var(--lxp-color-text);
  flex: 1;
}

.lxp-text-sm {
  font-size: var(--lxp-font-size-sm);
  color: var(--lxp-color-text-light);
}

.lxp-text-light {
  color: var(--lxp-color-text-light);
}

.lxp-card {
  background-color: var(--lxp-color-white);
  border-radius: var(--lxp-radius-md);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.lxp-flex-row {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.lxp-btn-sm {
  background-color: var(--lxp-color-primary);
  color: var(--lxp-color-white);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: var(--lxp-font-size-sm);
  border: none;
  cursor: pointer;
}

.lxp-registration-completed,
.action-btn.lxp-registration-completed,
.enroll-btn.lxp-registration-completed,
.growth-action.lxp-registration-completed,
.submit-btn.lxp-registration-completed {
  background: #B8BCC4 !important;
  background-image: none !important;
  border-color: #B8BCC4 !important;
  color: #fff !important;
  cursor: not-allowed !important;
  box-shadow: none !important;
  opacity: 1 !important;
}

/* Utilities */
.text-ellipsis {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}