/* 产品手册页面样式 - CodeYMate IDE
 * 严格视觉层级系统
 */

.prd-layout {
  display: flex;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 0 0 0;
  gap: 0;
  min-height: 100vh;
}

/* ========== 左侧导航 ========== */
.prd-sidebar {
  position: sticky;
  top: 80px;
  width: 240px;
  flex-shrink: 0;
  height: calc(100vh - 80px);
  padding: var(--spacing-xl) 0;
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
}

.prd-sidebar-label {
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-outline);
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.prd-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.prd-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px var(--spacing-lg);
  color: var(--color-on-surface-variant);
  text-decoration: none;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
}

.prd-nav-link:hover {
  color: var(--color-on-surface);
  background: var(--color-surface-container);
}

.prd-nav-link.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-surface-container);
}

[data-theme="dark"] .prd-nav-link.active {
  color: #00dbe7;
  border-left-color: #00dbe7;
}

.prd-nav-num {
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  color: var(--color-outline);
  min-width: 20px;
}

.prd-nav-link.active .prd-nav-num {
  color: var(--color-primary);
}

[data-theme="dark"] .prd-nav-link.active .prd-nav-num {
  color: #00dbe7;
}

/* ========== 右侧内容 ========== */
.prd-content {
  flex: 1;
  min-width: 0;
  padding: var(--spacing-2xl) var(--spacing-3xl);
}

.prd-content-inner {
  max-width: 860px;
  margin: 0 auto;
}

/* ========== 页面头部 ========== */
.prd-page-header {
  margin-bottom: var(--spacing-4xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
}

.prd-page-label {
  display: inline-block;
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  padding: 4px 10px;
  border: 1px solid;
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .prd-page-label {
  color: #00dbe7;
  border-color: rgba(0, 242, 255, 0.3);
}

.prd-page-title {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: var(--font-weight-bold);
  color: var(--color-on-surface);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

.prd-page-desc {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-on-surface-variant);
  max-width: 600px;
}

/* ========== 章节 (一级标题 H2) ========== */
.prd-section {
  margin-bottom: var(--spacing-4xl);
  scroll-margin-top: 100px;
}

.prd-chapter-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.prd-chapter-num {
  font-family: var(--font-code);
  font-size: 40px;
  font-weight: var(--font-weight-bold);
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.2;
  flex-shrink: 0;
}

[data-theme="dark"] .prd-chapter-num {
  color: #00dbe7;
}

.prd-chapter-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  color: var(--color-on-surface);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.prd-chapter-desc {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-on-surface-variant);
}

/* ========== 正文区域 ========== */
.prd-body {
  padding-left: 56px; /* 与章节编号对齐 */
}

/* ========== 正文文字 ========== */
.prd-text {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-on-surface-variant);
  margin-bottom: var(--spacing-md);
}

.prd-text strong {
  color: var(--color-on-surface);
  font-weight: var(--font-weight-semibold);
}

.prd-text code {
  padding: 2px 6px;
  background: var(--color-surface-container-high);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 13px;
  border: 1px solid var(--color-border);
}

[data-theme="dark"] .prd-text code {
  color: #00dbe7;
  background: rgba(0, 242, 255, 0.08);
  border-color: rgba(0, 242, 255, 0.15);
}

/* ========== 主题标题 (二级 H3) ========== */
.prd-topic {
  margin-bottom: var(--spacing-lg);
}

.prd-topic-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-primary);
}

[data-theme="dark"] .prd-topic-title {
  border-left-color: #00dbe7;
}

/* ========== 步骤 (三级 H4) ========== */
.prd-step {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.prd-step-marker {
  width: 1px;
  flex-shrink: 0;
  background: var(--color-primary);
}

[data-theme="dark"] .prd-step-marker {
  background: #00dbe7;
}

.prd-step-body {
  flex: 1;
  min-width: 0;
}

.prd-step-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface);
  margin-bottom: var(--spacing-sm);
}

/* ========== 选项 (四级 H5) ========== */
.prd-option {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.prd-option:hover {
  border-color: var(--color-primary);
}

[data-theme="dark"] .prd-option:hover {
  border-color: rgba(0, 242, 255, 0.4);
}

.prd-option-badge {
  font-family: var(--font-code);
  font-size: 12px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
}

[data-theme="dark"] .prd-option-badge {
  color: #00dbe7;
  border-color: #00dbe7;
}

.prd-option-body {
  flex: 1;
  min-width: 0;
}

.prd-option-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface);
  margin-bottom: 6px;
}

.prd-option-body .prd-text {
  margin-bottom: 0;
}

.prd-option-body .prd-figure {
  margin-top: var(--spacing-md);
}

/* ========== 图片 ========== */
.prd-figure {
  margin: var(--spacing-lg) 0;
}

.prd-image {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-secondary-fixed-dim);
  border-radius: var(--radius-default);
  transition: all var(--transition-base);
}

.prd-image:hover {
  box-shadow: 0 0 16px rgba(0, 219, 231, 0.25);
}

[data-theme="light"] .prd-image {
  border-color: var(--color-primary-light);
}

[data-theme="light"] .prd-image:hover {
  box-shadow: 0 0 16px rgba(0, 102, 255, 0.15);
}

.prd-figure figcaption {
  font-family: var(--font-code);
  font-size: 12px;
  color: var(--color-outline);
  margin-top: 8px;
  padding-left: 2px;
}

/* ========== 提示框 ========== */
.prd-tip {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 3px solid var(--color-primary);
  background: rgba(0, 102, 255, 0.04);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: var(--spacing-lg) 0;
}

[data-theme="dark"] .prd-tip {
  border-left-color: #00dbe7;
  background: rgba(0, 242, 255, 0.04);
}

.prd-tip .material-symbols-outlined {
  color: var(--color-primary);
  font-size: 20px;
  flex-shrink: 0;
  margin-top: 1px;
}

[data-theme="dark"] .prd-tip .material-symbols-outlined {
  color: #00dbe7;
}

.prd-tip p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-on-surface);
}

.prd-tip p code {
  padding: 2px 6px;
  background: var(--color-surface-container-high);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 13px;
}

[data-theme="dark"] .prd-tip p code {
  color: #00dbe7;
  background: rgba(0, 242, 255, 0.08);
}

/* ========== 特性列表 ========== */
.prd-feature-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.prd-feature-list li {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
}

.prd-feature-icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.prd-feature-icon .material-symbols-outlined {
  font-size: 18px;
  color: var(--color-primary);
}

[data-theme="dark"] .prd-feature-icon .material-symbols-outlined {
  color: #00dbe7;
}

.prd-feature-list li strong {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface);
  margin-right: 6px;
}

.prd-feature-list li p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-on-surface-variant);
  display: inline;
}

/* ========== 回到顶部按钮 ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-container-high);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-on-surface-variant);
  cursor: pointer;
  z-index: var(--z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .back-to-top:hover {
  color: #00dbe7;
  border-color: rgba(0, 219, 231, 0.5);
  box-shadow: 0 4px 16px rgba(0, 219, 231, 0.2);
}

/* ========== 滚动进度条 ========== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: calc(var(--z-sticky) + 10);
  background: transparent;
  pointer-events: none;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary-fixed-dim));
  transition: width 0.1s linear;
}

[data-theme="dark"] .scroll-progress-bar {
  background: linear-gradient(90deg, #00dbe7, #8447ff);
}

/* ========== 章节导航 (上一篇/下一篇) ========== */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.chapter-nav-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
  max-width: 48%;
}

.chapter-nav-link:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-container);
}

[data-theme="dark"] .chapter-nav-link:hover {
  border-color: rgba(0, 219, 231, 0.4);
}

.chapter-nav-direction {
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-outline);
}

.chapter-nav-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface);
}

.chapter-nav-link:only-child {
  margin-left: auto;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .prd-sidebar {
    width: 200px;
  }

  .prd-content {
    padding: var(--spacing-xl);
  }

  .prd-body {
    padding-left: 0;
  }
}

@media (max-width: 768px) {
  .prd-layout {
    flex-direction: column;
    padding-top: 80px;
  }

  .prd-sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
  }

  .prd-sidebar-label {
    display: none;
  }

  .prd-nav {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 0;
  }

  .prd-nav-link {
    white-space: nowrap;
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 8px 12px;
  }

  .prd-nav-link.active {
    border-left: none;
    border-bottom-color: var(--color-primary);
  }

  .prd-nav-num {
    display: none;
  }

  .prd-content {
    padding: var(--spacing-md);
  }

  .prd-body {
    padding-left: 0;
  }

  .prd-page-title {
    font-size: 32px;
  }

  .prd-chapter-header {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .prd-chapter-num {
    font-size: 28px;
  }

  .prd-chapter-title {
    font-size: 22px;
  }
}