/**
 * Help Styles - 说明书样式
 * @version 1.0.0
 * @date 2025-01-26
 */

/* ==================== 容器 ==================== */
#app-help {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  background: var(--bg-primary);
  overflow: hidden;
}

/* ==================== 导航栏 ==================== */
.help-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--navbar-padding);
  background: var(--navbar-bg-standard);
  border-bottom: 1px solid var(--navbar-border);
  flex-shrink: 0;
  position: relative;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.help-navbar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--brand-primary) 50%,
    transparent 100%);
  opacity: 0.3;
}

.help-navbar .nav-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--nav-title-font-size);
  font-weight: var(--nav-title-font-weight);
  color: var(--text-primary);
  pointer-events: none;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.help-navbar .nav-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--brand-primary);
  cursor: pointer;
  border-radius: 12px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.help-navbar .nav-btn i {
  font-size: 18px;
}

.help-navbar .nav-btn:hover {
  background: var(--bg-hover);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.help-navbar .nav-btn:active {
  background: var(--bg-active);
  transform: scale(0.95);
}

/* ==================== 内容区 ==================== */
.help-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  height: 100%;
}

/* ==================== 章节列表 ==================== */
.help-sections {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 30px; /* 增加底部间距，解决回弹问题 */
}

.help-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.2s;
}

.help-section:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.section-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: 10px;
  color: var(--color-primary);
  font-size: var(--font-size-xl);
}

.section-title {
  font-size: var(--nav-title-font-size);
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.section-content {
  font-size: var(--font-size-md);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.section-content p {
  margin: 0 0 12px 0;
}

.section-content p:last-child {
  margin-bottom: 0;
}

.section-content ul,
.section-content ol {
  margin: 12px 0;
  padding-left: 24px;
}

.section-content li {
  margin: 8px 0;
}

.section-content code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

.section-content strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ==================== 功能卡片 ==================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  transition: all 0.2s;
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: 8px;
  color: var(--color-primary);
}

.feature-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* ==================== 响应式 ==================== */
@media (max-width: 600px) {
  .help-content {
    padding: 12px;
  }
  
  .help-section {
    padding: 16px;
  }
  
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}