/* ============================================
 * PowerApps 学习中心 · 统一主题样式
 * 主色：Power Apps 紫 #742774 + 辅色 emerald #10B981
 * 适用：CN/PowerApps/*.html（共 11 页）
 * 参考：CN/styles/jiandaoyun-theme.css + CN/Zoho/assets/zoho-unified.css
 * ============================================ */

/* ============================================
   1. 全局变量
   ============================================ */
:root {
  --pa-primary: #742774;
  --pa-primary-hover: #5a1d5a;
  --pa-primary-light: rgba(116, 39, 116, 0.10);
  --pa-primary-shadow: rgba(116, 39, 116, 0.22);
  --pa-accent: #10B981;
  --pa-accent-hover: #059669;
  --pa-text-dark: #0f172a;
  --pa-text-gray: #475569;
  --pa-text-muted: #64748b;
  --pa-border: rgba(116, 39, 116, 0.16);
  --pa-bg-soft: #fafafe;
}

/* ============================================
   2. 容器宽度统一（与 zh-container 一致）
   ============================================ */
.pa-container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
@media (min-width: 768px) {
  .pa-container { padding-left: 1.5rem; padding-right: 1.5rem; }
}
@media (min-width: 1024px) {
  .pa-container { padding-left: 2rem; padding-right: 2rem; }
}

/* ============================================
   3. 一级导航 PowerApps 学习高亮链接
   ============================================ */
.pa-primary-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  font-weight: 600;
  background: linear-gradient(135deg, rgba(116, 39, 116, 0.18), rgba(116, 39, 116, 0.08));
  color: var(--pa-primary);
  border: 1px solid rgba(116, 39, 116, 0.4);
  transition: all 0.25s ease;
  text-decoration: none;
}
.pa-primary-link:hover {
  background: linear-gradient(135deg, #742774, #5a1d5a);
  color: #fff;
  box-shadow: 0 6px 16px var(--pa-primary-shadow);
}
.pa-primary-link i { color: var(--pa-primary); }
.pa-primary-link:hover i { color: #fff; }

/* ============================================
   4. 二级 sticky 导航（深色背景 · PowerApps 紫）
   ============================================ */
.pa-subnav {
  position: sticky;
  top: 55px;
  z-index: 40;
  background: rgba(15, 15, 20, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(116, 39, 116, 0.30);
}
.pa-subnav-inner {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow-x: auto;
  scrollbar-width: thin;
  padding: 0.6rem 0;
  white-space: nowrap;
}
.pa-subnav-inner::-webkit-scrollbar { height: 3px; }
.pa-subnav-inner::-webkit-scrollbar-thumb { background: rgba(116, 39, 116, 0.45); border-radius: 3px; }

.pa-subnav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.82);
  transition: all 0.2s ease;
  flex-shrink: 0;
  text-decoration: none;
}
.pa-subnav-link:hover {
  background: rgba(116, 39, 116, 0.20);
  color: #c084fc;
}
.pa-subnav-link.is-active {
  background: rgba(116, 39, 116, 0.32);
  color: #e9d5ff;
  font-weight: 600;
}
.pa-subnav-link i { font-size: 0.8rem; }
.pa-subnav-divider {
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.16);
  flex-shrink: 0;
}
.pa-subnav-back { color: #fcd34d !important; }
.pa-subnav-back:hover { background: rgba(252, 211, 77, 0.18) !important; }

/* ============================================
   5. 面包屑
   ============================================ */
.pa-breadcrumb {
  background: rgba(0, 0, 0, 0.28);
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(116, 39, 116, 0.14);
  font-size: 0.85rem;
}
.pa-breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.2s;
  text-decoration: none;
}
.pa-breadcrumb a:hover { color: #c084fc; }
.pa-breadcrumb .sep { color: rgba(255, 255, 255, 0.36); margin: 0 0.5rem; }
.pa-breadcrumb .current { color: #c084fc; font-weight: 500; }

/* ============================================
   6. 按钮（紫色品牌按钮 + 绿色辅助按钮）
   ============================================ */
.pa-btn-primary {
  background: var(--pa-primary);
  color: #FFFFFF !important;
  padding: 0.55rem 1.1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  border: 1px solid transparent;
}
.pa-btn-primary:hover {
  background: var(--pa-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--pa-primary-shadow);
}
.pa-btn-outline {
  background: transparent;
  color: var(--pa-primary);
  border: 1px solid var(--pa-primary);
  padding: 0.55rem 1.1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}
.pa-btn-outline:hover {
  background: var(--pa-primary);
  color: #FFFFFF;
}
.pa-btn-accent {
  background: var(--pa-accent);
  color: #FFFFFF !important;
  padding: 0.55rem 1.1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}
.pa-btn-accent:hover {
  background: var(--pa-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.25);
}

/* ============================================
   7. 卡片（紫色玻璃风）
   ============================================ */
.pa-card {
  background: linear-gradient(to bottom right, #FFFFFF 0%, var(--pa-bg-soft) 100%);
  border: 1px solid var(--pa-border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  position: relative;
  overflow: hidden;
  color: var(--pa-text-dark);
}
.pa-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--pa-primary-light) 0%, transparent 55%);
  opacity: 0;
  transition: opacity 0.4s ease;
  border-radius: inherit;
  pointer-events: none;
}
.pa-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 28px var(--pa-primary-shadow);
  border-color: rgba(116, 39, 116, 0.32);
}
.pa-card:hover::before { opacity: 1; }
.pa-card-dark {
  background: linear-gradient(to bottom right, rgba(30, 27, 75, 0.6) 0%, rgba(15, 23, 42, 0.7) 100%);
  border: 1px solid rgba(116, 39, 116, 0.30);
  color: rgba(255, 255, 255, 0.92);
}

/* ============================================
   8. 章节标题与正文（解决字体对比度低问题）
   ============================================ */
.pa-section { padding: 3rem 0; }
@media (min-width: 768px) { .pa-section { padding: 4rem 0; } }
.pa-section-title {
  color: var(--pa-primary);
  font-weight: 700;
  letter-spacing: -0.5px;
  font-size: 1.875rem;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) {
  .pa-section-title { font-size: 2.25rem; }
}
.pa-section-subtitle {
  color: var(--pa-text-gray);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}
.pa-text-body { color: var(--pa-text-dark); line-height: 1.7; }
.pa-text-muted { color: var(--pa-text-muted); line-height: 1.65; }
.pa-link {
  color: var(--pa-primary);
  text-decoration: none;
  border-bottom: 1px dashed rgba(116, 39, 116, 0.4);
  transition: all 0.2s;
}
.pa-link:hover { color: var(--pa-primary-hover); border-bottom-color: var(--pa-primary); }

/* ============================================
   9. 徽章
   ============================================ */
.pa-badge {
  background: var(--pa-primary-light);
  color: var(--pa-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
}
.pa-badge-recommended {
  background: var(--pa-primary);
  color: #FFFFFF;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.pa-badge-accent {
  background: rgba(16, 185, 129, 0.12);
  color: var(--pa-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
}

/* ============================================
   10. Hero 区与背景装饰
   ============================================ */
.pa-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1a0d2e 0%, #2d1b4e 50%, #1a0d2e 100%);
  color: #fff;
  padding: 4rem 0;
  border-radius: 1.5rem;
}
.pa-hero-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #c084fc 0%, #e9d5ff 50%, #c084fc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
@media (min-width: 768px) {
  .pa-hero-title { font-size: 2.75rem; }
}
.pa-hero-subtitle {
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.5rem;
}
.pa-hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  animation: pa-orb-shift 8s ease-in-out infinite;
}
.pa-hero-orb-1 {
  background: radial-gradient(circle, rgba(116, 39, 116, 0.30) 0%, transparent 70%);
  top: -10%; left: -5%; width: 500px; height: 500px;
  animation-delay: 0s;
}
.pa-hero-orb-2 {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, transparent 70%);
  bottom: -10%; right: -5%; width: 600px; height: 600px;
  animation-delay: 4s;
}
@keyframes pa-orb-shift {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 0.95; transform: scale(1.08); }
}

/* ============================================
   11. 图标盒子
   ============================================ */
.pa-icon-box {
  width: 3rem;
  height: 3rem;
  background: var(--pa-primary-light);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pa-primary);
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.pa-icon-box i { font-size: 1.5rem; }
.pa-icon-box:hover {
  transform: scale(1.08);
  box-shadow: 0 0 15px var(--pa-primary-shadow);
}

/* ============================================
   12. 第三方资源外链卡（统一加 nofollow noopener 样式提示）
   ============================================ */
.pa-ext-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--pa-primary);
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  border-radius: 0.5rem;
  background: var(--pa-primary-light);
  text-decoration: none;
  transition: all 0.2s ease;
}
.pa-ext-link:hover {
  background: var(--pa-primary);
  color: #fff;
}
.pa-ext-link::after {
  content: '\f08e';
  font-family: 'FontAwesome';
  font-size: 0.7rem;
  opacity: 0.8;
}

/* ============================================
   13. 响应式
   ============================================ */
@media (max-width: 768px) {
  .pa-card { padding: 1rem; }
  .pa-icon-box { width: 2.5rem; height: 2.5rem; }
  .pa-icon-box i { font-size: 1.25rem; }
  .pa-btn-primary, .pa-btn-outline, .pa-btn-accent { padding: 0.45rem 0.875rem; font-size: 0.875rem; }
  .pa-section { padding: 2.5rem 0; }
  .pa-hero { padding: 2.5rem 0; border-radius: 1rem; }
}

/* ============================================
   14. 性能优化
   ============================================ */
.pa-card, .pa-btn-primary, .pa-btn-outline, .pa-btn-accent, .pa-icon-box {
  will-change: transform;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   15. 打印
   ============================================ */
@media print {
  .pa-subnav, .pa-hero-orb { display: none; }
  .pa-card { box-shadow: none; border: 1px solid #e5e7eb; }
}