/* ============================================================
   图片色彩提取与高级渐变色生成器 — 原生手写 CSS
   ============================================================ */

/* ---------- CSS 变量与重置 ---------- */
:root {
  --bg: #f4f5f9;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border: #e5e7eb;
  --border-light: #f0f1f5;
  --primary: #4ecdc4;
  --primary-hover: #3dbdb5;
  --accent: #ff8fab;
  --accent-hover: #f07a99;
  --success: #10b981;
  --danger: #ef4444;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-ui: linear-gradient(135deg, #4ecdc4, #ff8fab);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---------- 顶部导航栏 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}

.brand-dot {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--gradient-ui);
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.35);
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav-tabs {
  display: flex;
  gap: 4px;
  background: var(--border-light);
  padding: 4px;
  border-radius: 10px;
  flex-shrink: 0;
}

.tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 7px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}

.tab:hover { color: var(--text); }

.tab.active {
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.tab[data-view="gradient"].active {
  color: var(--primary);
}

.tab[data-view="extractor"].active {
  color: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.more-tools-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--border-light);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  flex-shrink: 0;
}

.more-tools-link:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.more-tools-icon { font-size: 14px; }

.help-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--border-light);
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  line-height: 1;
}

.help-icon:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.08);
}

.author-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px 5px 5px;
  border-radius: 999px;
  background: var(--gradient-ui);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  font-family: inherit;
}

.author-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(78, 205, 196, 0.35);
}

.avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #fff;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.follow-text {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

/* ---------- 主内容 ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.view { animation: fadeIn 0.35s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 28px;
  border: 1px solid var(--border-light);
}

.module-head { margin-bottom: 24px; }

.module-head.help-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.module-head h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.module-sub {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

.btn.primary:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(78, 205, 196, 0.35);
}

/* 色彩提取页按钮用主题粉色 */
#view-extractor .btn.primary {
  background: var(--accent);
}

#view-extractor .btn.primary:hover:not(:disabled) {
  background: #f56c91;
  box-shadow: 0 4px 14px rgba(255, 143, 171, 0.4);
}

.btn.sm {
  padding: 6px 14px;
  font-size: 12px;
}

/* ---------- 提取控制区 ---------- */
.extract-controls {
  margin-bottom: 20px;
}

.count-control {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.count-control label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
  white-space: nowrap;
}

.count-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 28px;
  background: var(--gradient-ui);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.upload-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(78, 205, 196, 0.35);
}

.count-track {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 48px;
  width: 440px;
  max-width: 100%;
  flex-shrink: 0;
}

.mode-switch {
  display: inline-flex;
  background: var(--border-light);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
  flex-shrink: 0;
}

.mode-btn {
  padding: 7px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s ease;
  font-family: inherit;
}

.mode-btn.active {
  background: #fff;
  color: var(--accent);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.mode-btn:hover:not(.active) {
  color: var(--text);
}

.count-track-line {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  height: 8px;
  background: var(--accent);
  border-radius: 4px;
}

.count-btn {
  position: relative;
  z-index: 1;
  width: 36px;
  height: 26px;
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  transition: transform 0.25s ease;
  font-family: inherit;
}

.count-btn:hover {
  transform: scale(1.12);
}

.count-btn.active {
  transform: scale(1.4);
  color: var(--primary);
}

/* 选中态：横向椭圆光晕，平行于轨道 */
.count-btn.active::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 58px;
  height: 42px;
  background: radial-gradient(ellipse at center, rgba(255,143,171,0.55) 0%, rgba(255,143,171,0.2) 45%, transparent 70%);
  pointer-events: none;
  z-index: -1;
  border-radius: 50%;
}

/* ---------- 色卡区域（可点击拖拽上传） ---------- */
.palette-area {
  min-height: 160px;
  cursor: pointer;
  transition: var(--transition);
}

.palette-area.dragover {
  transform: scale(0.99);
}

.palette-area.dragover .empty-hint {
  border-color: var(--primary);
  background: rgba(78, 205, 196, 0.05);
  color: var(--primary);
}

.empty-hint {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
  font-size: 14px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: #fafbfc;
  transition: var(--transition);
}

.empty-icon {
  font-size: 36px;
  margin-bottom: 8px;
  opacity: 0.6;
}

.palette-card {
  max-width: 520px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
}

.palette-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-light);
}

.palette-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
}

.palette-meta {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

.palette-image-wrap {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #fff;
}

.palette-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.palette-swatches {
  display: flex;
  padding: 22px;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* 竖版图片：左右布局，和下载色卡保持一致 */
.palette-card.vertical {
  display: grid;
  grid-template-columns: 1fr 170px;
  grid-template-rows: auto 1fr;
}
.palette-card.vertical .palette-card-head {
  grid-column: 1 / -1;
}
.palette-card.vertical .palette-image-wrap {
  grid-column: 1;
  grid-row: 2;
  aspect-ratio: auto;
  height: 100%;
  min-height: 320px;
}
.palette-card.vertical .palette-swatches {
  grid-column: 2;
  grid-row: 2;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  padding: 16px 10px;
  gap: 6px;
}

.swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  flex: 1;
  min-width: 58px;
}

.swatch-circle {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px rgba(0, 0, 0, 0.06), var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition);
}

.swatch-circle:hover { transform: scale(1.12); }

.swatch-hex {
  font-size: 11px;
  font-family: "SF Mono", "Consolas", monospace;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.swatch-import {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  font-family: inherit;
}

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

.palette-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* ---------- 渐变预览显示器（16:9） ---------- */
.gradient-preview {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 360px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
  transition: background 0.3s ease;
  background: #0f0f1a;
  position: relative;
  overflow: hidden;
}

/* ---------- Mesh Gradient 光斑 ---------- */
.mesh-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.7;
  mix-blend-mode: screen;
  transition: background-color 4s ease;
  will-change: transform;
  pointer-events: none;
}

.mesh-blob.b1 { animation: meshFloat1 14s ease-in-out infinite; }
.mesh-blob.b2 { animation: meshFloat2 17s ease-in-out infinite; }
.mesh-blob.b3 { animation: meshFloat3 20s ease-in-out infinite; }
.mesh-blob.b4 { animation: meshFloat4 16s ease-in-out infinite; }

@keyframes meshFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(60px, 40px) scale(1.1); }
  66% { transform: translate(30px, -30px) scale(0.95); }
}
@keyframes meshFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-50px, 50px) scale(1.05); }
  66% { transform: translate(-30px, -40px) scale(1.1); }
}
@keyframes meshFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, -50px) scale(1.15); }
}
@keyframes meshFloat4 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-60px, 40px) scale(0.9); }
}

.gradient-preview.paused .mesh-blob {
  animation-play-state: paused;
}

/* ---------- 流动渐变层 ---------- */
.flow-layer {
  position: absolute;
  inset: 0;
  background-size: 400% 400%;
  opacity: 0;
  transition: opacity 2s ease;
  pointer-events: none;
}

.flow-layer.active { opacity: 1; }
.flow-layer.f1 { animation: flowShift 8s ease infinite; }
.flow-layer.f2 { animation: flowShift 10s ease infinite; }
.flow-layer.f3 { animation: flowShift 12s ease infinite; }

@keyframes flowShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.gradient-preview.paused .flow-layer {
  animation-play-state: paused;
}

/* ---------- 渐变控制区 ---------- */
.gradient-controls {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.gradient-controls .control-group { flex: 1; min-width: 200px; }

.gradient-controls .control-group > label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.seg {
  display: inline-flex;
  flex-wrap: wrap;
  background: var(--border-light);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.seg-btn {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.seg-btn.active {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

#angleGroup input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
}

#angleGroup input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.4);
}

#angleGroup input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.4);
}

/* ---------- 色阶编辑器 ---------- */
.stops-editor { margin-bottom: 20px; }

.stops-editor[hidden] { display: none; }

.stops-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.stops-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stop-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--border-light);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.stop-item:hover { background: #eef0f5; }

.stop-item { cursor: grab; }
.stop-item:active { cursor: grabbing; }
.stop-item.dragging { opacity: 0.4; transform: scale(0.95); }
.stop-item.drag-over { outline: 2px dashed var(--primary); outline-offset: 2px; }

.stop-color {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: none;
  padding: 0;
  flex-shrink: 0;
}

.stop-color::-webkit-color-swatch-wrapper { padding: 0; }

.stop-color::-webkit-color-swatch {
  border-radius: 8px;
  border: none;
}

.stop-color::-moz-color-swatch {
  border-radius: 8px;
  border: none;
}

.stop-hex-input {
  width: 78px;
  font-size: 12px;
  font-family: "SF Mono", "Consolas", monospace;
  font-weight: 600;
  color: var(--text-secondary);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  outline: none;
  transition: var(--transition);
  text-transform: uppercase;
}

.stop-hex-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.15);
}

.stop-pos-wrap {
  display: flex;
  align-items: center;
  gap: 2px;
}

.stop-pos {
  width: 42px;
  font-size: 12px;
  font-family: "SF Mono", "Consolas", monospace;
  font-weight: 600;
  color: var(--text-secondary);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 4px;
  outline: none;
  transition: var(--transition);
  text-align: center;
}

.stop-pos:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.15);
}

.stop-pos-unit {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
}

.stops-head-actions {
  display: flex;
  gap: 6px;
}

.icon-btn {
  width: 30px;
  height: 30px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  line-height: 1;
}

.icon-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.stop-color-wrap {
  position: relative;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
}

.stop-color-wrap .stop-color {
  width: 100%;
  height: 100%;
  border-radius: 8px;
}

.stop-color-icon {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 14px;
  height: 14px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
  pointer-events: none;
  line-height: 1;
}

.stop-color-wrap:hover::after {
  content: '点击选择颜色';
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(26,26,46,0.92);
  color: #fff;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 10;
}

.add-stop-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--border-light);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 22px;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
  font-family: inherit;
}

.add-stop-btn:hover {
  background: #eef0f5;
  border-color: var(--primary);
  color: var(--primary);
}

.add-stop-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.stop-remove {
  width: 26px;
  height: 26px;
  border: none;
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.stop-remove:hover {
  background: var(--danger);
  color: #fff;
}

/* ---------- 渐变操作按钮 ---------- */
.gradient-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.download-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: -18px;
  margin-bottom: 24px;
  padding-left: 2px;
}

/* ---------- 预设渐变库 ---------- */
.presets {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
}

.presets-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.presets-head > span:first-child {
  font-size: 15px;
  font-weight: 700;
}

.presets-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 10px;
}

.preset-item {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.preset-item:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.preset-item .preset-label {
  position: absolute;
  bottom: 2px;
  left: 4px;
  font-size: 9px;
  color: rgba(255,255,255,0.85);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

/* ---------- 示例卡片区 ---------- */
.example-section {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.example-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.example-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.home-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.home-link:hover {
  color: var(--primary);
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.example-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  background: var(--border-light);
  aspect-ratio: 4 / 3;
}

.example-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.example-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.example-author {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* 点击引导手指 */
.example-card.guide::after {
  content: '👆';
  position: absolute;
  bottom: 4px;
  right: 6px;
  font-size: 32px;
  opacity: 0.75;
  pointer-events: none;
  z-index: 2;
  animation: fingerTap 1.4s ease-in-out infinite;
}

@keyframes fingerTap {
  0%, 100% { transform: scale(1) rotate(-10deg); }
  50% { transform: scale(0.85) rotate(-10deg); }
}

@media (max-width: 768px) {
  .example-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 帮助页 ---------- */
.help-content {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.9;
}

.help-content h2,
.help-content h3 {
  color: var(--text);
  margin: 24px 0 10px;
}

.help-content h2 { font-size: 18px; }
.help-content h3 { font-size: 16px; }

.help-content p { margin-bottom: 12px; }

.help-content ul,
.help-content ol {
  padding-left: 22px;
  margin-bottom: 12px;
}

.help-content li { margin-bottom: 6px; }

.help-content code {
  background: var(--border-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: "SF Mono", "Consolas", monospace;
}

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ---------- 模态框 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: overlayIn 0.25s ease;
}

.modal[hidden] { display: none; }

@keyframes overlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-box {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  max-width: 90vw;
  width: 360px;
  padding: 32px 28px 28px;
  text-align: center;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(0, 0, 0, 0.06);
  color: var(--text-secondary);
  border-radius: 50%;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 10;
  font-family: inherit;
}

.modal-close:hover {
  background: var(--danger);
  color: #fff;
  transform: rotate(90deg);
}

.modal-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.modal-text {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.qr {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin: 0 auto 14px;
  display: block;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.wechat-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text);
}

/* ---------- 猫咪弹窗 ---------- */
.cat-box { width: 380px; }

.cat-emoji {
  font-size: 44px;
  margin-bottom: 14px;
}

.cat-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
  text-align: left;
}

.cat-box .qr {
  width: 180px;
  height: 180px;
  margin-bottom: 18px;
}

.cat-close-btn {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  background: #d1d5db;
  color: #6b7280;
  font-family: inherit;
}

.cat-close-btn:not(:disabled) {
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.cat-close-btn:not(:disabled):hover {
  background: var(--primary-hover);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(26, 26, 46, 0.92);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
}

.toast[hidden] { display: none; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .nav-inner { flex-wrap: wrap; height: auto; padding: 8px 14px; gap: 8px; }
  .brand { order: 1; }
  .nav-right { order: 2; margin-left: auto; }
  .nav-tabs { order: 3; width: 100%; justify-content: center; margin-top: 4px; padding-bottom: 6px; }
  .brand-title { font-size: 14px; }
  .follow-text { display: none; }
  .more-tools-link span:not(.more-tools-icon) { display: none; }
  .more-tools-link { padding: 7px 10px; }
  .tab { padding: 6px 14px; font-size: 13px; }
  .container { padding: 16px 14px 60px; }
  .card { padding: 20px 16px; }
  .module-head h2 { font-size: 18px; }
  .gradient-preview { max-height: none; }
  .mesh-blob { filter: blur(40px); }
  .count-control { flex-direction: column; align-items: stretch; gap: 10px; }
  .count-row { flex-direction: column; gap: 12px; }
  .count-track { width: 100%; max-width: 360px; }
  .mode-switch { align-self: center; margin-left: 0; }
  .stops-list { gap: 8px; }
  .stop-item { padding: 8px 10px; min-height: 44px; }
  .stop-color { width: 36px; height: 36px; }
  .stop-hex-input { width: 64px; }
  .seg-btn { padding: 7px 12px; font-size: 12px; }
  .preset-grid {
    grid-template-columns: repeat(auto-fill, minmax(58px, 1fr));
    gap: 8px;
  }
  .modal-box { width: 100%; padding: 28px 20px 22px; }
  .cat-box { width: 100%; }
  .example-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .palette-actions { flex-wrap: wrap; justify-content: center; }
  .palette-actions .btn { flex: 1 1 auto; min-width: 120px; }
  .palette-card.vertical { grid-template-columns: 1fr 110px; }
  .palette-card.vertical .palette-image-wrap { min-height: 240px; }
  .palette-card.vertical .swatch-circle { width: 36px; height: 36px; }
  .palette-card.vertical .swatch-hex { font-size: 9px; }
  .palette-card.vertical .swatch-import { font-size: 9px; padding: 2px 6px; }
}