/* ═══════════════════════════════════════════════════════════════════
   Markdown Guide — GitHub 风格暗色 Markdown 渲染器
   用于商品详情页的「使用指南」区域
   ═══════════════════════════════════════════════════════════════════ */

/* ─── 容器 & 滚动 ─── */
.md-guide {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.md-guide__header {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 0;
  flex-shrink: 0;
}

.md-guide__scroll {
  flex: 1;
  overflow-y: auto;
  padding: 20px 4px 20px 0;
  min-height: 0;
  max-height: 520px;
  scroll-behavior: smooth;
}

/* 自定义滚动条 */
.md-guide__scroll::-webkit-scrollbar {
  width: 5px;
}
.md-guide__scroll::-webkit-scrollbar-track {
  background: transparent;
}
.md-guide__scroll::-webkit-scrollbar-thumb {
  background: rgba(14, 165, 233, 0.2);
  border-radius: 10px;
  transition: background 0.2s;
}
.md-guide__scroll::-webkit-scrollbar-thumb:hover {
  background: rgba(14, 165, 233, 0.45);
}

/* 滚动渐隐遮罩 */
.md-guide__scroll-fade {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
.md-guide__scroll-fade::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--bg-card));
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.md-guide__scroll-fade--active::after {
  opacity: 1;
}

/* ─── Markdown 内容区基础 ─── */
.md-body {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-muted);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ─── 标题 ─── */
.md-body h1,
.md-body h2,
.md-body h3,
.md-body h4 {
  color: var(--text-main);
  font-family: var(--font-heading);
  margin-top: 24px;
  margin-bottom: 12px;
  line-height: 1.3;
  position: relative;
}

.md-body h1 { font-size: 1.3rem; font-weight: 800; }
.md-body h2 {
  font-size: 1.1rem;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}
.md-body h2::before {
  content: '';
  width: 3px;
  height: 18px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent-color), #7c3aed);
  flex-shrink: 0;
}
.md-body h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--accent-color);
}
.md-body h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.md-body > *:first-child {
  margin-top: 0;
}

/* ─── 段落 & 文本 ─── */
.md-body p {
  margin: 0 0 12px;
}

.md-body strong {
  color: var(--text-main);
  font-weight: 700;
}

.md-body em {
  color: var(--accent-color);
  font-style: italic;
}

/* ─── 链接 ─── */
.md-body a {
  color: var(--accent-color);
  text-decoration: none;
  border-bottom: 1px dashed rgba(14, 165, 233, 0.3);
  transition: all 0.2s;
  padding-bottom: 1px;
}
.md-body a:hover {
  border-bottom-color: var(--accent-color);
  color: var(--accent-hover);
}

/* ─── 行内代码 ─── */
.md-body code:not(pre code) {
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  font-size: 0.82em;
  padding: 2px 7px;
  border-radius: 5px;
  background: rgba(14, 165, 233, 0.08);
  color: var(--accent-color);
  border: 1px solid rgba(14, 165, 233, 0.12);
  white-space: nowrap;
}

/* ─── 代码块 ─── */
.md-body pre {
  position: relative;
  margin: 14px 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.md-body pre code {
  display: block;
  padding: 14px 16px;
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
  color: var(--text-main);
}

[data-theme="light"] .md-body pre code {
  background: #f1f5f9;
}
[data-theme="dark"] .md-body pre code {
  background: rgba(15, 23, 42, 0.6);
}

/* 代码块语言标签 */
.md-body pre::before {
  content: attr(data-lang);
  position: absolute;
  top: 0;
  right: 0;
  padding: 2px 10px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--border-color);
  border-radius: 0 10px 0 6px;
  opacity: 0.7;
}

/* ─── 引用块 ─── */
.md-body blockquote {
  margin: 14px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--accent-color);
  border-radius: 0 8px 8px 0;
  background: rgba(14, 165, 233, 0.04);
  color: var(--text-muted);
  font-style: normal;
}
.md-body blockquote p {
  margin: 0;
}
.md-body blockquote strong {
  color: var(--accent-color);
}

/* ─── Callout 告警框 (用 blockquote + emoji 约定) ─── */
/* > ℹ️ Info / > ⚠️ Warning / > 🚫 Danger / > ✅ Tip / > 💡 Note */

.md-callout {
  margin: 14px 0;
  padding: 12px 14px;
  border-radius: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
  line-height: 1.6;
}
.md-callout p { margin: 0; }

.md-callout--info {
  background: rgba(14, 165, 233, 0.06);
  border: 1px solid rgba(14, 165, 233, 0.18);
  color: var(--text-muted);
}
.md-callout--info .md-callout__icon { color: var(--accent-color); }

.md-callout--warning {
  background: rgba(245, 158, 11, 0.06);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--text-muted);
}
.md-callout--warning .md-callout__icon { color: #f59e0b; }

.md-callout--danger {
  background: rgba(239, 68, 68, 0.06);
  border: 1px solid rgba(239, 68, 68, 0.18);
  color: var(--text-muted);
}
.md-callout--danger .md-callout__icon { color: var(--error-color); }

.md-callout--success {
  background: rgba(34, 197, 94, 0.06);
  border: 1px solid rgba(34, 197, 94, 0.18);
  color: var(--text-muted);
}
.md-callout--success .md-callout__icon { color: var(--success-color); }

.md-callout__icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}

.md-callout strong {
  color: var(--text-main);
}

/* ─── 列表 ─── */
.md-body ul,
.md-body ol {
  padding-left: 22px;
  margin: 10px 0;
}

.md-body li {
  margin-bottom: 6px;
  padding-left: 4px;
}

.md-body ul li::marker {
  color: var(--accent-color);
}
.md-body ol li::marker {
  color: var(--accent-color);
  font-weight: 700;
  font-size: 0.85em;
}

/* 任务列表 */
.md-body li input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  margin-right: 6px;
  vertical-align: middle;
  position: relative;
  cursor: default;
}
.md-body li input[type="checkbox"]:checked {
  background: var(--accent-color);
  border-color: var(--accent-color);
}
.md-body li input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: -1px;
  left: 2px;
  font-size: 11px;
  color: white;
  font-weight: bold;
}

/* ─── 表格 ─── */
.md-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 0.82rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.md-body thead th {
  font-weight: 700;
  text-align: left;
  padding: 10px 14px;
  color: var(--text-main);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

[data-theme="light"] .md-body thead th {
  background: rgba(14, 165, 233, 0.06);
  border-bottom: 2px solid rgba(14, 165, 233, 0.15);
}
[data-theme="dark"] .md-body thead th {
  background: rgba(14, 165, 233, 0.08);
  border-bottom: 2px solid rgba(14, 165, 233, 0.2);
}

.md-body tbody td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
}

.md-body tbody tr:last-child td {
  border-bottom: none;
}

[data-theme="dark"] .md-body tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}
[data-theme="light"] .md-body tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.015);
}

.md-body tbody tr:hover {
  background: rgba(14, 165, 233, 0.04);
}

/* ─── 分隔线 ─── */
.md-body hr {
  border: none;
  height: 1px;
  margin: 20px 0;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

/* ─── 图片 ─── */
.md-body img {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin: 12px 0;
  display: block;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}
.md-body img:hover {
  transform: scale(1.01);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}

/* ─── 标签药丸 (自定义语法: 用 <span class="md-tag">xxx</span>) ─── */
.md-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  margin: 2px 3px;
  transition: all 0.2s;
}
.md-tag--blue {
  background: rgba(14, 165, 233, 0.08);
  color: var(--accent-color);
  border: 1px solid rgba(14, 165, 233, 0.15);
}
.md-tag--green {
  background: rgba(34, 197, 94, 0.08);
  color: var(--success-color);
  border: 1px solid rgba(34, 197, 94, 0.15);
}
.md-tag--red {
  background: rgba(239, 68, 68, 0.08);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.15);
}
.md-tag--yellow {
  background: rgba(245, 158, 11, 0.08);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.15);
}
.md-tag--purple {
  background: rgba(124, 58, 237, 0.08);
  color: #7c3aed;
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.md-tag:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

/* ─── 步骤指示器 (自定义语法) ─── */
.md-step {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  position: relative;
}
.md-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 14px;
  top: 38px;
  bottom: -4px;
  width: 2px;
  background: linear-gradient(180deg, rgba(14, 165, 233, 0.3), rgba(14, 165, 233, 0.05));
}
.md-step__num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-color), #38bdf8);
  color: white;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.25);
  position: relative;
  z-index: 1;
}
.md-step__content {
  flex: 1;
  padding-top: 3px;
}

/* ─── 代码对比块 ─── */
.md-code-compare {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
}
.md-code-compare__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
}
.md-code-compare__item--ok {
  background: rgba(34, 197, 94, 0.06);
  border: 1px solid rgba(34, 197, 94, 0.15);
  color: var(--success-color);
}
.md-code-compare__item--bad {
  background: rgba(239, 68, 68, 0.06);
  border: 1px solid rgba(239, 68, 68, 0.15);
  color: var(--error-color);
  text-decoration: line-through;
  text-decoration-color: rgba(239, 68, 68, 0.4);
}
.md-code-compare__label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}
.md-code-compare__item--ok .md-code-compare__label {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success-color);
}
.md-code-compare__item--bad .md-code-compare__label {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error-color);
}

/* ─── 质保区块 ─── */
.md-warranty {
  color: var(--accent-color);
  font-size: 0.88rem;
  padding: 16px;
  background: rgba(124, 58, 237, 0.04);
  border-radius: 12px;
  border: 1px solid rgba(124, 58, 237, 0.12);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: auto;
  flex-shrink: 0;
}
.md-warranty__title {
  margin-bottom: 4px;
  font-weight: 800;
  font-size: 0.95rem;
}
.md-warranty__text {
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
}

/* ─── 响应式 ─── */
@media (max-width: 768px) {
  .md-guide__scroll {
    max-height: none;
    padding: 16px 0;
  }
  .md-body h2::before {
    display: none;
  }
  .md-body pre code {
    font-size: 0.75rem;
    padding: 12px;
  }
}