/* ============================================
   抖音带货 AI 图片提示词手册 · 样式
   设计：左侧粘性目录 + 文档式主内容
   ============================================ */

/* ---------- Reset & 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #fe2c55;        /* 抖音红 */
  --primary-soft: #ffe7ec;
  --primary-dark: #c81e44;
  --accent: #ff7a45;
  --bg: #fafbfc;
  --bg-card: #ffffff;
  --bg-soft: #f5f6f8;
  --bg-code: #1e1e2e;
  --text: #1f2329;
  --text-soft: #4e5969;
  --text-mute: #86909c;
  --border: #e5e6eb;
  --border-soft: #f0f1f3;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --sidebar-w: 260px;
  --content-max: 880px;
  --header-h: 56px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, Monaco, "Courier New", monospace;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

code,
kbd {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--primary-dark);
}

/* ---------- 进度条 ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 1000;
  width: 0;
  transition: width 0.1s ease-out;
}

/* ---------- 移动端顶部 ---------- */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-soft);
  z-index: 99;
  padding: 0 16px;
  align-items: center;
  justify-content: space-between;
}

.menu-toggle {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}

.menu-toggle:hover {
  background: var(--bg-soft);
}

.mobile-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.mobile-top {
  font-size: 18px;
  color: var(--text-soft);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.15s;
}

.mobile-top:hover {
  background: var(--bg-soft);
}

/* ---------- 布局 ---------- */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-card);
  border-right: 1px solid var(--border-soft);
  z-index: 100;
  overflow-y: auto;
  transition: transform 0.3s ease;
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.sidebar-inner {
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 8px 20px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 18px;
}

.brand-icon {
  font-size: 32px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #ffe7ec, #ffd4d4);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-mute);
  margin-top: 2px;
}

.toc {
  flex: 1;
}

.toc-group {
  margin-bottom: 18px;
}

.toc-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 8px 6px;
}

.toc-link {
  display: block;
  padding: 7px 10px;
  font-size: 13.5px;
  color: var(--text-soft);
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
  transition: all 0.15s;
  border-left: 2px solid transparent;
}

.toc-link:hover {
  background: var(--bg-soft);
  color: var(--text);
}

.toc-link.active {
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 600;
  border-left-color: var(--primary);
}

.sidebar-foot {
  margin-top: auto;
  padding: 16px 8px 0;
  border-top: 1px solid var(--border-soft);
}

.foot-stat {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.foot-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  font-feature-settings: "tnum";
}

.foot-label {
  font-size: 12px;
  color: var(--text-mute);
}

.sidebar-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s, visibility 0.3s;
}

.sidebar-mask.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ---------- 主内容 ---------- */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  max-width: calc(var(--content-max) + 80px);
  padding: 0 40px 80px;
  min-width: 0;
}

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 56px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 56px;
}

.hero-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 640px;
}

.hero-desc strong {
  color: var(--text);
  font-weight: 600;
}

.kbd {
  display: inline-block;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text);
  font-family: var(--font-mono);
  font-weight: 500;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.meta-item {
  text-align: center;
}

.meta-num {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  font-feature-settings: "tnum";
}

.meta-label {
  display: block;
  font-size: 12px;
  color: var(--text-mute);
  margin-top: 2px;
}

.hero-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  padding: 14px 18px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
}

.flow-step {
  color: var(--text);
  font-weight: 500;
}

.flow-arrow {
  color: var(--text-mute);
  font-size: 14px;
}

/* ---------- 章节 ---------- */
.doc-section {
  padding-bottom: 64px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-soft);
}

.doc-section:last-of-type {
  border-bottom: none;
}

.section-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text);
  letter-spacing: -0.3px;
}

.section-lead {
  font-size: 15.5px;
  color: var(--text-soft);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 700px;
}

.sub-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sub-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}

.sub-sub {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-soft);
  margin: 24px 0 12px;
}

/* ---------- 总览卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.overview-card {
  display: block;
  padding: 22px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  transition: all 0.2s;
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.overview-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--primary);
  transition: height 0.3s;
}

.overview-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft);
  color: var(--text);
}

.overview-card:hover::before {
  height: 100%;
}

.ov-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.85;
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 12px;
}

.ov-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}

.ov-desc {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
  margin-bottom: 12px;
  min-height: 42px;
}

.ov-tools {
  font-size: 11px;
  color: var(--text-mute);
  padding-top: 10px;
  border-top: 1px solid var(--border-soft);
  font-family: var(--font-mono);
}

/* ---------- 步骤列表 ---------- */
.step-list {
  list-style: none;
  counter-reset: step;
  margin: 0 0 28px;
}

.step {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--border-soft);
}

.step:last-child {
  border-bottom: none;
}

.step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.step-body {
  flex: 1;
  padding-top: 3px;
  color: var(--text);
  line-height: 1.7;
}

.step-body code {
  background: var(--bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  color: var(--primary-dark);
}

/* ---------- 提示词卡片（核心） ---------- */
.prompt-card {
  position: relative;
  background: var(--bg-code);
  border-radius: var(--radius);
  padding: 40px 22px;
  margin: 16px 0;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.prompt-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 28px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.prompt-card::after {
  content: "";
  position: absolute;
  top: 9px;
  left: 14px;
  width: 9px;
  height: 9px;
  background: #ff5f56;
  border-radius: 50%;
  box-shadow: 16px 0 0 #ffbd2e, 32px 0 0 #27c93f;
}

.prompt-head {
  position: relative;
  display: flex;
  align-items: center;
  margin: -10px 0 12px;
  padding-left: 60px;
  min-height: 22px;
}

.prompt-tag {
  font-size: 11px;
  font-weight: 600;
  color: #d4d4d4;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 10px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  font-family: var(--font-mono);
}

.prompt-tag-ok {
  background: rgba(34, 197, 94, 0.18);
  color: #4ade80;
}

.prompt-text {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: #e4e4e7;
  white-space: pre-wrap;
  word-wrap: break-word;
  word-break: break-word;
  padding: 0;
  margin: 0;
  max-height: 600px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
  -webkit-overflow-scrolling: touch;
}

.prompt-text::-webkit-scrollbar {
  width: 6px;
}

.prompt-text::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.prompt-card-ok {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  box-shadow: 0 2px 12px rgba(34, 197, 94, 0.1);
}

.copy-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(255, 255, 255, 0.1);
  color: #fafafa;
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 2;
}

.copy-btn::before {
  content: "📋";
  font-size: 11px;
}

.copy-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.copy-btn:active {
  transform: scale(0.96);
}

.copy-btn.copied {
  background: #22c55e;
  border-color: #22c55e;
  color: #fff;
}

.copy-btn.copied::before {
  content: "✓";
}

/* ---------- Callout ---------- */
.callout {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--radius);
  margin: 16px 0;
  border-left: 3px solid;
}

.callout-icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 1.5;
}

.callout-body {
  flex: 1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.callout-body strong {
  font-weight: 700;
}

.callout code {
  background: rgba(0, 0, 0, 0.08);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12.5px;
}

.callout-tip {
  background: #fff8e6;
  border-color: #faad14;
}

.callout-warn {
  background: #fff1f0;
  border-color: #f5222d;
}

.callout-info {
  background: #e6f4ff;
  border-color: #1677ff;
}

/* ---------- 公式块 ---------- */
.formula {
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text);
  text-align: center;
  margin: 16px 0;
  overflow-x: auto;
  white-space: nowrap;
}

/* ---------- 方法卡片 ---------- */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin: 16px 0 24px;
}

.method-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.method-recommend {
  border-color: var(--primary-soft);
  background: linear-gradient(180deg, #fffafb, var(--bg-card));
}

.method-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.method-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.method-desc {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
}

.method-desc code {
  background: var(--bg-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  color: var(--primary-dark);
}

.method-steps {
  list-style: decimal;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

.method-steps li {
  margin-bottom: 4px;
}

/* ---------- 范例块 ---------- */
.example-block {
  margin: 20px 0 8px;
}

.example-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.example-tag {
  flex-shrink: 0;
  min-width: 36px;
  height: 28px;
  padding: 0 8px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.example-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  margin: 16px 0;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 600px;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-soft);
}

.data-table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
  font-size: 13px;
}

.data-table td {
  color: var(--text-soft);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: var(--bg-soft);
}

/* ---------- 图片画廊 ---------- */
.gallery {
  display: grid;
  gap: 14px;
  margin: 20px 0 24px;
}

.gallery-3 {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.gallery-4 {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

.gallery-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s;
  margin: 0;
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  display: block;
  background: var(--bg-soft);
}

.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 10px;
  font-size: 11.5px;
  font-weight: 500;
  color: #fff;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.7));
  text-align: center;
  line-height: 1.3;
}

/* ---------- 效果图（嵌入提示词下方） ---------- */
.result-strip {
  margin: 14px 0 28px;
  padding: 18px 20px 20px;
  background: linear-gradient(180deg, #fff5f7 0%, #fff 50%);
  border: 1px solid var(--primary-soft);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  position: relative;
}

.result-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--primary-dark);
  background: #fff;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--primary-soft);
  margin-bottom: 14px;
}

.result-img {
  margin: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  transition: all 0.2s;
  max-width: 220px;
}

.result-img:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft);
}

.result-img img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  display: block;
  background: var(--bg-soft);
}

.result-img figcaption {
  padding: 8px 12px;
  font-size: 11.5px;
  color: var(--text-soft);
  background: var(--bg-soft);
  text-align: center;
  line-height: 1.4;
  border-top: 1px solid var(--border-soft);
}

.result-img-wide {
  max-width: 360px;
}

/* 配对展示（多张图） */
.result-pair {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.result-pair .result-img {
  max-width: none;
}

/* ---------- 过程流（多步骤） ---------- */
.process-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  position: relative;
}

.process-step {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0;
  transition: all 0.2s;
}

.process-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -10px;
  transform: translateY(-50%);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  z-index: 1;
  background: #fff;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 2px var(--primary-soft);
}

.process-step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft);
}

.process-num {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  letter-spacing: 0.5px;
}

.process-step img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  display: block;
  background: var(--bg-soft);
}

.process-step figcaption {
  padding: 8px 10px;
  font-size: 11.5px;
  color: var(--text-soft);
  background: var(--bg-soft);
  text-align: center;
  line-height: 1.4;
  border-top: 1px solid var(--border-soft);
}

/* ---------- 速查表 ---------- */
.lookup-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.lookup-group {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: all 0.2s;
}

.lookup-group:hover {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow);
}

.lookup-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}

.lookup-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.lookup-group li {
  font-size: 13px;
  color: var(--text-soft);
  padding: 4px 0;
  line-height: 1.5;
}

.lookup-group code {
  background: var(--bg-soft);
  color: var(--primary-dark);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 11.5px;
  font-weight: 600;
}

/* ---------- 底部 ---------- */
.doc-foot {
  margin-top: 80px;
}

.foot-card {
  background: linear-gradient(135deg, #fff5f7, #fff);
  border: 1px solid var(--primary-soft);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.foot-card-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.foot-card p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
  margin-bottom: 6px;
}

.foot-hint {
  font-size: 13px !important;
}

.foot-hint code {
  background: var(--bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--primary-dark);
}

.foot-copyright {
  text-align: center;
  font-size: 12px;
  color: var(--text-mute);
  padding: 20px 0;
}

/* ---------- 浮动按钮 ---------- */
.float-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(254, 44, 85, 0.4);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 50;
}

.float-top.show {
  opacity: 1;
  transform: translateY(0);
}

.float-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(31, 35, 41, 0.95);
  color: #fff;
  padding: 10px 18px;
  border-radius: 100px;
  font-size: 13.5px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-icon {
  width: 20px;
  height: 20px;
  background: #22c55e;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

/* ============================================
   响应式：平板
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --sidebar-w: 220px;
  }

  .main {
    padding: 0 32px 60px;
  }

  .hero-title {
    font-size: 36px;
  }
}

/* ============================================
   响应式：移动端
   ============================================ */
@media (max-width: 768px) {
  .mobile-header {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.1);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-mask {
    display: block;
  }

  .main {
    margin-left: 0;
    padding: calc(var(--header-h) + 24px) 18px 60px;
  }

  .hero {
    padding: 32px 0 36px;
    margin-bottom: 40px;
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-desc {
    font-size: 14.5px;
  }

  .hero-meta {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .meta-num {
    font-size: 20px;
  }

  .hero-flow {
    font-size: 12px;
    padding: 12px 14px;
    gap: 6px;
  }

  .section-title {
    font-size: 24px;
  }

  .section-lead {
    font-size: 14.5px;
  }

  .sub-title {
    font-size: 17px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .method-grid {
    grid-template-columns: 1fr;
  }

  .prompt-card {
    padding: 50px 16px;
  }

  .prompt-head {
    padding-left: 50px;
    margin: -8px 0 10px;
  }

  .prompt-text {
    font-size: 12.5px;
    line-height: 1.7;
    max-height: 400px;
  }

  .copy-btn {
    padding: 5px 10px;
    font-size: 11.5px;
  }

  .step {
    gap: 12px;
  }

  .step-num {
    width: 24px;
    height: 24px;
    font-size: 12px;
  }

  .gallery-3,
  .gallery-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .result-strip {
    padding: 14px;
    margin: 10px 0 20px;
  }

  .result-img {
    max-width: 200px;
  }

  .result-img-wide {
    max-width: 240px;
  }

  .result-pair {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .process-flow {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .float-top {
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
  }

  .data-table {
    font-size: 13px;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
  }

  .formula {
    font-size: 12.5px;
    padding: 14px 16px;
  }
}

@media (max-width: 420px) {
  .hero-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 21px;
  }

  .prompt-text {
    font-size: 12px;
  }

  .hero-flow {
    font-size: 11px;
  }

  .toast {
    bottom: 70px;
    font-size: 12.5px;
    padding: 8px 14px;
  }
}

/* ---------- 减少动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   左右 5:5 布局（提示词 + 效果图 并排）
   ============================================================ */
.prompt-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
  margin: 20px 0 32px;
}

.prompt-row > .prompt-side,
.prompt-row > .image-side {
  min-width: 0;
}

.prompt-row .example-block {
  margin: 0;
}

.prompt-row .prompt-card {
  margin: 0;
}

.prompt-row .image-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  top: 0;
}

/* 单图结果位：粉色轻背景卡片 */
.prompt-row .image-side .single-result {
  background: linear-gradient(180deg, #fff5f7 0%, #fff 70%);
  border: 1px solid var(--primary-soft);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
}

.prompt-row .image-side .single-result .label {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--primary-dark);
  background: #fff;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--primary-soft);
  margin-bottom: 10px;
  align-self: flex-start;
}

.prompt-row .image-side .single-result img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  border-radius: calc(var(--radius) - 2px);
  display: block;
  background: var(--bg-soft);
}

.prompt-row .image-side .single-result figcaption {
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--text-soft);
  text-align: center;
  line-height: 1.4;
}

/* 多图网格：合并系列 / 流程系列 放在 image-side 内 */
.prompt-row .image-side .img-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.prompt-row .image-side .img-grid figure {
  margin: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.prompt-row .image-side .img-grid img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.prompt-row .image-side .img-grid figcaption {
  padding: 5px 8px;
  font-size: 10.5px;
  color: var(--text-soft);
  text-align: center;
  line-height: 1.35;
  background: var(--bg-soft);
  border-top: 1px solid var(--border-soft);
}

/* 流程步骤（带箭头） */
.prompt-row .image-side .img-flow {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.prompt-row .image-side .img-flow figure {
  margin: 0;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.prompt-row .image-side .img-flow .step-num {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  padding: 4px 8px;
  letter-spacing: 0.4px;
  z-index: 1;
}

.prompt-row .image-side .img-flow img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.prompt-row .image-side .img-flow figcaption {
  padding: 5px 8px 7px;
  font-size: 10.5px;
  color: var(--text-soft);
  text-align: center;
  line-height: 1.35;
  background: var(--bg-soft);
  border-top: 1px solid var(--border-soft);
}

/* 整行铺满（无图 prompt） */
.prompt-row-full > .prompt-side {
  grid-column: 1 / -1;
}

/* 占位：无配图时显示提示 */
.prompt-row .image-side .image-placeholder {
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 28px 18px;
  text-align: center;
  color: var(--text-soft);
  font-size: 12.5px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  height: 100%;
  min-height: 160px;
  justify-content: center;
}

.prompt-row .image-side .image-placeholder .ph-icon {
  font-size: 28px;
  opacity: 0.6;
}

/* 移动端：上下堆叠 */
@media (max-width: 768px) {
  .prompt-row {
    grid-template-columns: 1fr;
    gap: 12px;
    margin: 16px 0 24px;
  }
  .prompt-row .image-side {
    order: 2;
  }
  .prompt-row .prompt-side {
    order: 1;
  }
  .prompt-row .image-side .img-grid,
  .prompt-row .image-side .img-flow {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   工具栏：搜索 + 标签筛选 + 导入导出
   ============================================ */
.toolbar {
  /* position: sticky; */
  top: 16px;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin: 24px 0 32px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-row.tools-row-1 {
  border-bottom: 1px dashed var(--border-soft);
  padding-bottom: 12px;
}

.toolbar-row.tools-row-2 {
  padding-top: 2px;
}

#searchBox {
  flex: 1;
  min-width: 200px;
  padding: 9px 14px;
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  outline: none;
  transition: all 0.2s;
}

#searchBox:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(254, 44, 85, 0.12);
}

#searchBox::placeholder {
  color: var(--text-mute);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s;
}

.tag-chip:hover {
  border-color: var(--primary-soft);
  color: var(--primary);
}

.tag-chip input[type="checkbox"] {
  margin: 0;
  width: 13px;
  height: 13px;
  accent-color: var(--primary);
  cursor: pointer;
}

.tag-chip:has(input:checked) {
  background: linear-gradient(180deg, #fff5f7 0%, #fff 70%);
  color: var(--primary);
  border-color: var(--primary-soft);
  font-weight: 600;
}

.toolbar-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.action-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: linear-gradient(180deg, #fff5f7 0%, #fff 100%);
}

.action-btn:active {
  transform: translateY(1px);
}

.toolbar-hint {
  font-size: 11.5px;
  color: var(--text-mute);
  margin-left: auto;
  white-space: nowrap;
}

/* 状态横幅 */
.empty-banner,
.error-banner {
  text-align: center;
  padding: 60px 24px;
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.6;
  margin: 40px 0;
}

.empty-banner small {
  color: var(--text-mute);
  font-size: 12.5px;
  display: inline-block;
  margin-top: 4px;
}

.error-banner {
  color: var(--primary-dark);
  background: linear-gradient(180deg, #fff5f7 0%, #fff 100%);
  border-color: var(--primary-soft);
}

/* 工具栏移动端：折行 */
@media (max-width: 768px) {
  .toolbar {
    padding: 10px 12px;
    margin: 16px 0 24px;
    border-radius: var(--radius);
  }
  .toolbar-row {
    gap: 6px;
  }
  #searchBox {
    font-size: 13px;
    padding: 8px 12px;
  }
  .tag-chip {
    font-size: 11.5px;
    padding: 4px 9px;
  }
  .action-btn {
    font-size: 12px;
    padding: 6px 10px;
  }
  .toolbar-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}