/* ============================================================
   U2工具箱 - 主样式表
   三色调色板：亮绿(#39FF14) / 深绿(#0d3b2e) / 近黑(#061010)
   双主题：暗色（默认） / 亮色
   ============================================================ */

/* ---------- 暗色主题（默认）三色调变量 ---------- */
:root {
  /* 三主色 */
  --green:        #39FF14;
  --green-dark:   #0d3b2e;
  --green-darker: #061410;
  --green-dim:    #27cc0d;
  --green-glow:   0 0 8px #39FF14, 0 0 20px rgba(57,255,20,0.4);
  --green-glow-lg:0 0 12px #39FF14, 0 0 40px rgba(57,255,20,0.5), 0 0 80px rgba(57,255,20,0.2);
  /* 绿色调透明变体（hover/selected 用） */
  --green-bg-6:   rgba(57,255,20,0.06);
  --green-bg-8:   rgba(57,255,20,0.08);
  --green-bg-10:  rgba(57,255,20,0.10);
  --green-bg-15:  rgba(57,255,20,0.15);
  --green-bg-20:  rgba(57,255,20,0.20);
  --green-bg-30:  rgba(57,255,20,0.30);
  --green-bg-40:  rgba(57,255,20,0.40);
  --green-bg-50:  rgba(57,255,20,0.50);
  --green-bg-60:  rgba(57,255,20,0.60);
  /* 背景层：中性深灰阶梯 */
  --bg:           #0a0a0a;
  --bg2:          #111111;
  --bg3:          #1a1a1a;
  --bg4:          #222222;
  --bg5:          #2a2a2a;
  /* 边框 */
  --border:       rgba(57,255,20,0.2);
  --border-hover: rgba(57,255,20,0.6);
  --border-subtle: rgba(255,255,255,0.08);
  /* 文字 */
  --text:         #e0e0e0;
  --text-dim:     #888888;
  --text-dark:    #555555;
  /* 字体 */
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  --font-main:    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  /* 圆角与过渡 */
  --radius:       4px;
  --radius-lg:    8px;
  --transition:   0.2s ease;
}

/* ---------- 亮色主题三色调变量 ---------- */
[data-theme="light"] {
  --green:        #1a9a40;
  --green-dark:   #c8e8d5;
  --green-darker: #eaf5ee;
  --green-dim:    #147a33;
  --green-glow:   0 0 6px rgba(26,154,64,0.3), 0 0 14px rgba(26,154,64,0.15);
  --green-glow-lg:0 0 10px rgba(26,154,64,0.4), 0 0 30px rgba(26,154,64,0.2);
  --green-bg-6:   rgba(26,154,64,0.05);
  --green-bg-8:   rgba(26,154,64,0.07);
  --green-bg-10:  rgba(26,154,64,0.09);
  --green-bg-15:  rgba(26,154,64,0.12);
  --green-bg-20:  rgba(26,154,64,0.16);
  --green-bg-30:  rgba(26,154,64,0.24);
  --green-bg-40:  rgba(26,154,64,0.32);
  --green-bg-50:  rgba(26,154,64,0.40);
  --green-bg-60:  rgba(26,154,64,0.48);
  --bg:           #ffffff;
  --bg2:          #f0faf4;
  --bg3:          #dff0e5;
  --bg4:          #c8e8d5;
  --bg5:          #b0dec0;
  --border:       rgba(13,59,46,0.22);
  --border-hover: rgba(26,154,64,0.55);
  --border-subtle: rgba(200,232,213,0.35);
  --text:         #1a3325;
  --text-dim:     #5a7a6b;
  --text-dark:    #8fa89c;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--green); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; text-shadow: var(--green-glow); }
img { max-width: 100%; }
input, textarea, select, button { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-dim); }

/* ---------- 选中文字 ---------- */
::selection { background: var(--green); color: #000; }

/* ============================================================
   顶部导航
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navbar-bg, rgba(10,10,10,0.95));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 56px;
  display: flex;
  align-items: center;
}
[data-theme="light"] .navbar { --navbar-bg: rgba(255,255,255,0.96); }
.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.navbar-logo {
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--green);
  text-shadow: var(--green-glow);
  white-space: nowrap;
  letter-spacing: 1px;
}
.navbar-logo span { color: var(--text); }
.navbar-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}
.navbar-nav a {
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 13px;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--green);
  border-color: var(--border);
  background: var(--green-bg-6);
  text-shadow: none;
}
.navbar-search {
  position: relative;
  flex-shrink: 0;
}
.navbar-search input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 36px 6px 14px;
  width: 220px;
  color: var(--text);
  outline: none;
  transition: all var(--transition);
  font-size: 13px;
}
.navbar-search input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 2px var(--green-bg-15);
  width: 280px;
}
.navbar-search input::placeholder { color: var(--text-dark); }
.navbar-search-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  display: flex;
  align-items: center;
}
.navbar-search-btn:hover { color: var(--green); }

/* ============================================================
   主体布局
   ============================================================ */
.main-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  width: 200px;
  flex-shrink: 0;
  position: sticky;
  top: 72px;
  transition: width 0.25s ease, opacity 0.25s ease;
}
.sidebar.collapsed {
  width: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
.sidebar-title {
  font-size: 11px;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}
.sidebar-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dim);
  padding: 0;
  transition: all 0.2s;
  flex-shrink: 0;
}
.sidebar-toggle:hover {
  color: var(--green);
  border-color: var(--green);
  background: var(--green-bg-6);
}
.sidebar-toggle svg {
  transition: transform 0.25s;
}
/* 折叠后的浮动展开按钮 */
.sidebar-expand-btn {
  position: fixed;
  left: 8px;
  top: 80px;
  z-index: 100;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dim);
  padding: 0;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.sidebar-expand-btn:hover {
  color: var(--green);
  border-color: var(--green);
  background: var(--green-bg-8);
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 13px;
  transition: all var(--transition);
  border-left: 2px solid transparent;
}
.sidebar-nav a:hover {
  color: var(--green);
  background: var(--green-bg-6);
  border-left-color: var(--green);
  text-shadow: none;
}
.sidebar-nav a.active {
  color: var(--green);
  background: var(--green-bg-8);
  border-left-color: var(--green);
  text-shadow: 0 0 6px var(--green-bg-40);
}
.sidebar-icon {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  flex-shrink: 0;
}

/* ---------- 内容区 ---------- */
.content { flex: 1; min-width: 0; }

/* ============================================================
   工具卡片网格
   ============================================================ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--green-bg-10);
}
.tool-card:hover::before { transform: scaleX(1); }
.tool-card-icon {
  width: 36px;
  height: 36px;
  background: var(--green-bg-8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--green);
  font-size: 18px;
  transition: all var(--transition);
}
.tool-card:hover .tool-card-icon {
  background: var(--green-bg-15);
  box-shadow: 0 0 8px var(--green-bg-30);
}
.tool-card-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-card-summary {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.badge {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}
.badge-hot { background: rgba(255,80,50,0.2); color: #ff5032; border: 1px solid rgba(255,80,50,0.4); }
.badge-new { background: var(--green-bg-15); color: var(--green); border: 1px solid var(--border); }

/* ============================================================
   分区标题
   ============================================================ */
.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono);
}
.section-title-accent {
  color: var(--green);
  text-shadow: var(--green-glow);
}
.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
}
.section-more {
  font-size: 12px;
  color: var(--text-dark);
  transition: color var(--transition);
}
.section-more:hover { color: var(--green); text-shadow: none; }

/* ============================================================
   Hero 区域（首页顶部）
   ============================================================ */
.hero {
  text-align: center;
  padding: 60px 20px 48px;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse at center, var(--green-bg-6) 0%, transparent 70%);
  pointer-events: none;
}
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  font-family: var(--font-mono);
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero-title .accent {
  color: var(--green);
  text-shadow: var(--green-glow-lg);
}
.hero-subtitle {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.hero-search {
  display: flex;
  max-width: 560px;
  margin: 0 auto 32px;
  gap: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 5px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.hero-search:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-bg-10), var(--green-glow);
}
.hero-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 8px 16px;
  color: var(--text);
  font-size: 14px;
}
.hero-search input::placeholder { color: var(--text-dark); }
.hero-search-btn {
  background: var(--green);
  color: #333;
  border: none;
  border-radius: 32px;
  padding: 8px 24px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.hero-search-btn:hover {
  background: var(--green-dim);
  box-shadow: var(--green-glow);
}
[data-theme="light"] .hero-search-btn,
[data-theme="light"] .hero-search-btn:hover { color: #fff; }
.hero-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-tags a {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px 12px;
  transition: all var(--transition);
}
.hero-tags a:hover {
  color: var(--green);
  border-color: var(--border-hover);
  text-shadow: none;
}

/* ============================================================
   工具详情页
   ============================================================ */
.tool-page {
  max-width: 900px;
}
.tool-page-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.tool-page-icon {
  width: 52px;
  height: 52px;
  background: var(--green-bg-10);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  font-size: 24px;
  flex-shrink: 0;
}
.tool-page-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono);
}
.tool-page-summary {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}
.tool-breadcrumb {
  font-size: 12px;
  color: var(--text-dark);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-breadcrumb a { color: var(--text-dark); }
.tool-breadcrumb a:hover { color: var(--green); text-shadow: none; }
.tool-breadcrumb-sep { color: var(--text-dark); }

/* 工具操作区 */
.tool-workspace {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.tool-intro {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}
.tool-intro h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}
.tool-intro p { font-size: 13px; color: var(--text-dim); margin-bottom: 8px; line-height: 1.7; }
.tool-intro ul { padding-left: 16px; list-style: disc; }
.tool-intro li { font-size: 13px; color: var(--text-dim); margin-bottom: 6px; line-height: 1.6; }
.tool-intro strong { color: var(--text); }

/* ---------- 亮色主题下 toast 阴影调整 ---------- */
[data-theme="light"] .toast {
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--text-dim);
  flex-shrink: 0;
  transition: all var(--transition);
}
.theme-toggle:hover {
  color: var(--green);
  border-color: var(--border-hover);
}
.theme-toggle svg { display: block; }
/* 默认暗色：显示太阳（切到亮色）；亮色：显示月亮（切回暗色） */
.theme-toggle .icon-sun  { display: block; }
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ============================================================
   表单元素
   ============================================================ */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
  letter-spacing: 0.3px;
}
.form-control {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  color: var(--text);
  outline: none;
  transition: all var(--transition);
  font-size: 13px;
}
.form-control:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 2px var(--green-bg-10);
}
.form-control::placeholder { color: var(--text-dark); }
textarea.form-control {
  resize: vertical;
  min-height: 140px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.form-control-mono { font-family: var(--font-mono); }
.input-row {
  display: flex;
  gap: 8px;
}
.input-row .form-control { flex: 1; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  outline: none;
}
.btn-primary {
  background: var(--green);
  color: #333;
  border-color: var(--green);
}
.btn-primary:hover {
  background: var(--green-dim);
  color: #333;
  box-shadow: var(--green-glow);
}
[data-theme="light"] .btn-primary,
[data-theme="light"] .btn-primary:hover { color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--green);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--green);
  background: var(--green-bg-8);
  color: var(--green);
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-hover);
}
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 11px 28px; font-size: 15px; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ============================================================
   代码/输出区
   ============================================================ */
.output-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  min-height: 80px;
  white-space: pre-wrap;
  word-break: break-all;
  position: relative;
  line-height: 1.6;
}
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.output-label {
  font-size: 11px;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.copy-btn {
  font-size: 11px;
  color: var(--text-dim);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px 10px;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.copy-btn:hover { color: var(--green); border-color: var(--border-hover); }
.copy-btn.copied { color: var(--green); border-color: var(--green); }

/* ============================================================
   标签栏 Tab
   ============================================================ */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab {
  padding: 9px 16px;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition);
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--green); border-bottom-color: var(--green); font-weight: 600; }

/* ============================================================
   提示/Toast
   ============================================================ */
.toast-container {
  position: fixed;
  top: 72px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text);
  animation: slideIn 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.toast-success { border-left: 3px solid var(--green); }
.toast-error   { border-left: 3px solid #ff4444; }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dark);
  margin-top: 60px;
}
.footer a { color: var(--text-dark); }
.footer a:hover { color: var(--green); text-shadow: none; }

/* ============================================================
   回到顶部按钮
   ============================================================ */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 9000;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg3);
  color: var(--green);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  pointer-events: none;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--green-bg-15);
  border-color: var(--border-hover);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4), var(--green-glow);
}
.back-to-top:active {
  transform: translateY(0) scale(0.92);
}
[data-theme="light"] .back-to-top {
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
[data-theme="light"] .back-to-top:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.18), var(--green-glow);
}
/* 移动端适配 */
@media (max-width: 640px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
  }
}

/* ============================================================
   工具：JSON格式化
   ============================================================ */
.json-editor-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.json-tree { font-family: var(--font-mono); font-size: 13px; line-height: 1.7; }
.json-key   { color: #79c0ff; }
.json-str   { color: #a5d6ff; }
.json-num   { color: #f2cc60; }
.json-bool  { color: var(--green); }
.json-null  { color: var(--text-dim); font-style: italic; }
.json-error { color: #ff6b6b; background: rgba(255,107,107,0.08); padding: 8px 12px; border-radius: var(--radius); border-left: 3px solid #ff6b6b; font-size: 12px; margin-top: 8px; }

/* ============================================================
   工具：JSON视图
   ============================================================ */
.json-viewer-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.json-tree-container { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; min-height: 300px; max-height: 600px; overflow: auto; }
.json-tree-empty { color: var(--text-dim); font-size: 13px; text-align: center; padding: 60px 20px; }
.json-node { position: relative; }
.json-toggle { display: inline-block; width: 16px; cursor: pointer; color: var(--text-dim); user-select: none; font-size: 11px; flex-shrink: 0; }
.json-toggle:hover { color: var(--text); }
.json-toggle-empty { cursor: default; }
.json-colon { color: var(--text-dim); }
.json-bracket { color: var(--text-dim); }
.json-count { color: var(--text-dim); font-size: 11px; font-style: italic; }
.json-collapsed { color: var(--text-dim); font-style: italic; }
.json-children { padding-left: 20px; border-left: 1px solid var(--border); margin-left: 6px; }
.json-entry { cursor: pointer; padding: 1px 4px; border-radius: 3px; transition: background 0.15s; }
.json-entry:hover { background: rgba(255,255,255,0.04); }

/* 搜索 */
.json-search-bar { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; padding: 8px 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); }
.json-search-input { flex: 1; background: transparent; border: none; color: var(--text); font-size: 13px; outline: none; padding: 4px 0; }
.json-search-input::placeholder { color: var(--text-dim); }
.json-search-count { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.json-search-highlight { background: rgba(255,200,50,0.35); color: inherit; border-radius: 2px; padding: 0 1px; }
.json-search-active { background: rgba(255,140,0,0.6); }

/* 节点详情 */
.json-node-detail { margin-top: 16px; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.json-detail-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.json-detail-table th { text-align: left; padding: 8px 12px; background: var(--bg2); color: var(--text-dim); font-weight: 500; font-size: 12px; border-bottom: 1px solid var(--border); }
.json-detail-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
.json-detail-table code { font-family: var(--font-mono); font-size: 12px; color: var(--text); word-break: break-all; }

/* ============================================================
   工具：文本对比
   ============================================================ */
.diff-view { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.diff-added   { background: var(--green-bg-10);  }
.diff-removed { background: rgba(255,80,80,0.1); }
.diff-line { padding: 1px 8px; font-family: var(--font-mono); font-size: 12px; line-height: 1.7; white-space: pre-wrap; word-break: break-all; }

/* ============================================================
   工具：图片尺寸调整
   ============================================================ */
.resize-upload { border: 2px dashed var(--border); border-radius: var(--radius); padding: 60px 20px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.resize-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.resize-upload-drag { border-color: var(--green); background: var(--green-bg-6); }
.resize-upload-text { color: var(--text); font-size: 15px; margin: 0 0 6px; }
.resize-upload-hint { color: var(--text-dim); font-size: 12px; margin: 0; }

.resize-controls { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.resize-mode-tabs { display: flex; gap: 0; margin-bottom: 14px; border-bottom: 1px solid var(--border); }
.resize-mode-tab { background: none; border: none; color: var(--text-dim); padding: 8px 16px; cursor: pointer; font-size: 13px; border-bottom: 2px solid transparent; transition: color 0.2s, border-color 0.2s; }
.resize-mode-tab.active { color: var(--green); border-bottom-color: var(--green); }
.resize-mode-tab:hover { color: var(--text); }

.resize-input-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.resize-input-group { display: flex; flex-direction: column; gap: 4px; }
.resize-input-label { font-size: 12px; color: var(--text-dim); }
.resize-input { width: 120px; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 14px; font-family: var(--font-mono); outline: none; transition: border-color 0.2s; }
.resize-input:focus { border-color: var(--green); }
.resize-link-icon { cursor: pointer; color: var(--text-dim); padding: 4px; margin-top: 18px; border-radius: 4px; transition: color 0.2s, background 0.2s; }
.resize-link-icon:hover { color: var(--text); background: var(--bg2); }
.resize-lock-unlocked { color: #ff6b6b; }
.resize-lock-unlocked:hover { color: #ff6b6b; }

.resize-preset-btns { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 18px; }

.resize-quality-row { display: flex; align-items: center; gap: 12px; margin-top: 12px; }
.resize-range { flex: 1; max-width: 200px; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.resize-range::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; background: var(--green); border-radius: 50%; cursor: pointer; }

.resize-preview-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.resize-preview-box { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.resize-preview-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.resize-info { font-size: 12px; color: var(--text-dim); font-family: var(--font-mono); }
.resize-preview-img-wrap { padding: 16px; display: flex; align-items: center; justify-content: center; min-height: 200px; background: var(--bg2); }
.resize-preview-img { max-width: 100%; max-height: 400px; object-fit: contain; }
.resize-result-empty { color: var(--text-dim); font-size: 13px; }

/* ============================================================
   工具：图片压缩
   ============================================================ */
.compress-upload { border: 2px dashed var(--border); border-radius: var(--radius); padding: 60px 20px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.compress-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.compress-upload-drag { border-color: var(--green); background: var(--green-bg-6); }
.compress-upload-text { color: var(--text); font-size: 15px; margin: 0 0 6px; }
.compress-upload-hint { color: var(--text-dim); font-size: 12px; margin: 0; }

.compress-controls { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.compress-quality-row { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.compress-quality-label { font-size: 13px; color: var(--text-dim); white-space: nowrap; }
.compress-quality-val { font-size: 13px; color: var(--green); font-weight: 600; min-width: 36px; font-family: var(--font-mono); }
.compress-range { flex: 1; max-width: 260px; -webkit-appearance: none; height: 6px; background: var(--border); border-radius: 3px; outline: none; cursor: pointer; }
.compress-range::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; background: var(--green); border-radius: 50%; cursor: pointer; box-shadow: 0 0 6px var(--green-bg-30); }
.compress-preset-btns { display: flex; gap: 6px; flex-wrap: wrap; }

/* 批量文件列表 */
.compress-batch-stats { padding: 10px 14px; margin-bottom: 12px; background: var(--green-bg-6); border: 1px solid var(--green-bg-20); border-radius: var(--radius); font-size: 13px; color: var(--green); font-family: var(--font-mono); }
.compress-file-list { display: flex; flex-direction: column; gap: 8px; }
.compress-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); transition: border-color 0.2s; }
.compress-item-done { border-color: var(--green-bg-30); }
.compress-item-thumb { width: 56px; height: 56px; border-radius: 4px; overflow: hidden; background: var(--bg2); flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.compress-item-thumb img { width: 100%; height: 100%; object-fit: cover; }
.compress-item-info { flex: 1; min-width: 0; }
.compress-item-name { font-size: 13px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 2px; }
.compress-item-meta { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.compress-item-saved { color: var(--green); }
.compress-item-nosave { color: var(--text-dim); }
.compress-item-pending { color: #f2cc60; }
.compress-item-actions { display: flex; gap: 6px; flex-shrink: 0; }
.compress-item-empty { text-align: center; color: var(--text-dim); padding: 40px 20px; font-size: 13px; }

/* ============================================================
   工具：APP介绍图生成
   ============================================================ */
.screenshot-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 20px; align-items: start; }
.screenshot-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.screenshot-section { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.screenshot-section:last-child { border-bottom: none; margin-bottom: 0; }
.screenshot-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.screenshot-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.screenshot-hint { font-size: 11px; color: var(--text-dim); float: right; margin-top: -18px; position: relative; }
.screenshot-input { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; transition: border-color 0.2s; }
.screenshot-input:focus { border-color: var(--green); }
.screenshot-input-sm { width: 70px; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 6px 8px; color: var(--text); font-size: 12px; outline: none; text-align: center; }
.screenshot-input-sm:focus { border-color: var(--green); }
.screenshot-select { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; cursor: pointer; }
.screenshot-select:focus { border-color: var(--green); }
.screenshot-color { width: 36px; height: 30px; border: 1px solid var(--border); border-radius: 4px; cursor: pointer; padding: 2px; background: var(--bg2); }
.screenshot-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.screenshot-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }
.screenshot-presets { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.screenshot-preset { background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 6px; color: var(--text-dim); font-size: 12px; cursor: pointer; text-align: center; transition: all 0.2s; }
.screenshot-preset:hover { border-color: var(--green); color: var(--text); }
.screenshot-preset.active { border-color: var(--green); color: var(--green); background: var(--green-bg-6); }
.screenshot-custom-size { display: flex; align-items: center; gap: 6px; margin-top: 8px; font-size: 12px; color: var(--text-dim); }
.screenshot-row { display: flex; gap: 12px; }
.screenshot-col { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.screenshot-upload { border: 1px dashed var(--border); border-radius: 6px; padding: 16px; text-align: center; cursor: pointer; transition: border-color 0.2s; display: flex; align-items: center; justify-content: center; min-height: 60px; }
.screenshot-upload:hover { border-color: var(--green); }
.screenshot-upload svg { color: var(--text-dim); }
.screenshot-upload span { display: block; color: var(--text-dim); font-size: 12px; margin-top: 4px; }
.screenshot-preview-area { position: sticky; top: 80px; }
.screenshot-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.screenshot-preview-size { font-size: 12px; color: var(--text-dim); font-family: var(--font-mono); }
.screenshot-preview-container { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; display: flex; align-items: center; justify-content: center; min-height: 400px; }
.screenshot-canvas { border-radius: 4px; box-shadow: 0 4px 24px rgba(0,0,0,0.3); }

/* 面板切换标签 */
.screenshot-panel-tabs { display: flex; gap: 4px; }
.screenshot-panel-tab { flex: 1; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 6px 0; color: var(--text-dim); font-size: 13px; cursor: pointer; text-align: center; transition: all 0.2s; }
.screenshot-panel-tab:hover { border-color: var(--green); color: var(--text); }
.screenshot-panel-tab.active { border-color: var(--green); color: var(--green); background: var(--green-bg-6); }

/* 对齐按钮 */
.screenshot-align-btns { display: flex; gap: 4px; }
.screenshot-align-btn { flex: 1; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 6px 0; color: var(--text-dim); font-size: 12px; cursor: pointer; text-align: center; transition: all 0.2s; }
.screenshot-align-btn:hover { border-color: var(--green); color: var(--text); }
.screenshot-align-btn.active { border-color: var(--green); color: var(--green); background: var(--green-bg-6); }

/* 预览缩放滑块 */
.screenshot-zoom-range { width: 80px; -webkit-appearance: none; height: 3px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.screenshot-zoom-range::-webkit-slider-thumb { -webkit-appearance: none; width: 12px; height: 12px; background: var(--green); border-radius: 50%; cursor: pointer; }

/* 拖拽提示 */
.screenshot-drag-hint { text-align: center; font-size: 12px; color: var(--text-dim); margin-top: 10px; }
.screenshot-val-hint { font-size: 11px; color: var(--green); font-family: var(--font-mono); }

/* 配色预设色块 */
.screenshot-color-presets { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.screenshot-color-preset { height: 36px; border-radius: 6px; cursor: pointer; border: 2px solid transparent; transition: border-color 0.15s, transform 0.15s; }
.screenshot-color-preset:hover { transform: scale(1.1); z-index: 2; }
.screenshot-color-preset.active { border-color: var(--green); box-shadow: 0 0 8px var(--green-bg-50); }

/* 行内配色圆点（边框/文字颜色） */
.screenshot-inline-color { display: flex; align-items: center; gap: 8px; }
.screenshot-color-presets-inline { display: flex; gap: 4px; flex-wrap: wrap; }
.screenshot-color-dot { display: inline-block; width: 20px; height: 20px; border-radius: 50%; cursor: pointer; border: 2px solid transparent; transition: border-color 0.15s, transform 0.15s; flex-shrink: 0; }
.screenshot-color-dot:hover { transform: scale(1.2); }
.screenshot-color-dot.active { border-color: var(--green); box-shadow: 0 0 6px var(--green-bg-50); }

/* ============================================================
   工具：图片加水印
   ============================================================ */
.watermark-wrap { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: start; }
.watermark-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.watermark-section { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.watermark-section:last-child { border-bottom: none; margin-bottom: 0; }
.watermark-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }

.watermark-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 28px 16px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.watermark-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.watermark-upload-drag { border-color: var(--green); background: var(--green-bg-6); }
.watermark-upload-sm { padding: 16px; }
.watermark-upload-sm img { object-fit: contain; }

/* 类型切换标签 */
.watermark-tabs { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.watermark-tab { flex: 1; background: var(--bg2); border: none; padding: 8px 0; color: var(--text-dim); font-size: 13px; cursor: pointer; transition: all 0.2s; }
.watermark-tab:hover { color: var(--text); }
.watermark-tab.active { background: var(--green); color: #000; font-weight: 600; }

/* 通用组件 */
.watermark-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.watermark-val { font-size: 11px; color: var(--green); font-family: var(--font-mono); float: right; }
.watermark-input { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; }
.watermark-input:focus { border-color: var(--green); }
.watermark-input-sm { width: 70px; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 6px 8px; color: var(--text); font-size: 13px; font-family: var(--font-mono); outline: none; text-align: center; }
.watermark-input-sm:focus { border-color: var(--green); }
.watermark-select { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; cursor: pointer; }
.watermark-select:focus { border-color: var(--green); }
.watermark-color { width: 32px; height: 28px; border: 1px solid var(--border); border-radius: 4px; cursor: pointer; padding: 2px; background: var(--bg2); }
.watermark-color-dot { display: inline-block; width: 18px; height: 18px; border-radius: 50%; cursor: pointer; border: 2px solid var(--border); flex-shrink: 0; transition: border-color 0.15s; }
.watermark-color-dot:hover { border-color: var(--green); }
.watermark-inline { display: flex; align-items: center; gap: 4px; }
.watermark-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.watermark-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }
.watermark-row { display: flex; gap: 12px; }
.watermark-col { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.watermark-check-label { cursor: pointer; user-select: none; display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-dim); }
.watermark-check-label:hover { color: var(--text); }
.watermark-check-label input[type="checkbox"] { accent-color: var(--green); }

/* 预览区 */
.watermark-preview-area { position: sticky; top: 80px; }
.watermark-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.watermark-info { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.watermark-canvas-wrap { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; min-height: 320px; overflow: hidden; }
.watermark-canvas-wrap canvas { display: block; max-width: 100%; user-select: none; }
.watermark-canvas-empty { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; }

/* ============================================================
   工具：AI图片放大
   ============================================================ */
.upscale-wrap { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: start; }
.upscale-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.upscale-section { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.upscale-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.upscale-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }

.upscale-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 28px 16px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.upscale-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.upscale-upload-drag { border-color: var(--green); background: var(--green-bg-6); }

.upscale-preset-row { display: flex; gap: 6px; }
.upscale-preset { flex: 1; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; padding: 10px 0; color: var(--text-dim); font-size: 18px; font-weight: 600; font-family: var(--font-mono); cursor: pointer; transition: all 0.2s; }
.upscale-preset:hover { border-color: var(--green); color: var(--text); }
.upscale-preset.active { border-color: var(--green); color: var(--green); background: var(--green-bg-6); }

.upscale-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.upscale-val { font-size: 11px; color: var(--green); font-family: var(--font-mono); float: right; }
.upscale-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.upscale-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }
.upscale-quick-hints { display: flex; gap: 4px; margin-top: 6px; }
.upscale-quick-hints span { padding: 2px 10px; background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; font-size: 11px; color: var(--text-dim); cursor: pointer; transition: all 0.2s; }
.upscale-quick-hints span:hover { border-color: var(--green); color: var(--text); }
.upscale-quick-hints span.active { border-color: var(--green); color: var(--green); background: var(--green-bg-6); }
.upscale-check-label { cursor: pointer; user-select: none; display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-dim); }
.upscale-check-label:hover { color: var(--text); }
.upscale-check-label input[type="checkbox"] { accent-color: var(--green); }
.upscale-status { margin-top: 10px; font-size: 12px; min-height: 18px; }

/* 预览区 */
.upscale-preview-area { position: sticky; top: 80px; }
.upscale-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.upscale-view-tabs { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.upscale-view-tab { background: var(--bg2); border: none; padding: 5px 12px; color: var(--text-dim); font-size: 12px; cursor: pointer; transition: all 0.2s; }
.upscale-view-tab:hover { color: var(--text); }
.upscale-view-tab.active { background: var(--green); color: #000; font-weight: 600; }

.upscale-compare-box { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; min-height: 320px; overflow: hidden; }
.upscale-compare-empty { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; }

.upscale-split-view { position: relative; overflow: hidden; }
.upscale-preview-canvas { display: block; max-width: 100%; border-radius: var(--radius); }
.upscale-split-canvas { display: block; }

.upscale-divider { position: absolute; top: 0; bottom: 0; width: 4px; background: var(--green); cursor: col-resize; z-index: 10; transform: translateX(-50%); box-shadow: 0 0 8px var(--green-bg-40); }
.upscale-divider-handle { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 28px; height: 28px; background: var(--green); border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 10px var(--green-bg-50); }
.upscale-divider-handle::before, .upscale-divider-handle::after { content: ''; position: absolute; width: 2px; height: 12px; background: #000; }
.upscale-divider-handle::before { left: 8px; }
.upscale-divider-handle::after { right: 8px; }

/* ============================================================
   工具：GIF拆图
   ============================================================ */
.gif2img-wrap { max-width: 100%; }

.gif2img-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 50px 20px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.gif2img-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.gif2img-upload-drag { border-color: var(--green); background: var(--green-bg-6); }

/* 帧网格 */
.gif2img-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.gif2img-card { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: border-color 0.2s, box-shadow 0.2s; }
.gif2img-card:hover { border-color: var(--green-dim); box-shadow: 0 2px 12px rgba(0,0,0,0.2); }
.gif2img-card-img { position: relative; background: var(--bg2); display: flex; align-items: center; justify-content: center; padding: 8px; min-height: 120px; }
.gif2img-card-img img { max-width: 100%; max-height: 180px; border-radius: 2px; display: block; }
.gif2img-card-idx { position: absolute; top: 4px; left: 4px; background: rgba(0,0,0,0.7); color: var(--green); font-size: 11px; font-family: var(--font-mono); padding: 2px 6px; border-radius: 3px; }
.gif2img-card-info { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; gap: 8px; }
.gif2img-card-delay { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); white-space: nowrap; }
.gif2img-card-info .btn-sm { padding: 3px 10px; font-size: 11px; }

/* ============================================================
   工具：多图合成GIF
   ============================================================ */
.img2gif-wrap { max-width: 100%; }

.img2gif-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 50px 20px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.img2gif-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.img2gif-upload-drag { border-color: var(--green); background: var(--green-bg-6); }

.img2gif-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 14px; padding: 12px 16px; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); }
.img2gif-bar-left { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.img2gif-bar-right { display: flex; align-items: center; gap: 8px; }

/* 图片列表 */
.img2gif-list { display: flex; flex-wrap: wrap; gap: 10px; }
.img2gif-item { position: relative; width: 120px; background: var(--bg3); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; cursor: grab; transition: border-color 0.2s; }
.img2gif-item:hover { border-color: var(--green-dim); }
.img2gif-item:active { cursor: grabbing; }
.img2gif-item img { width: 100%; height: 80px; object-fit: cover; display: block; }
.img2gif-item-name { display: block; padding: 4px 8px; font-size: 10px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.img2gif-item-idx { position: absolute; top: 2px; left: 2px; background: rgba(0,0,0,0.7); color: var(--green); font-size: 11px; font-family: var(--font-mono); padding: 1px 5px; border-radius: 3px; z-index: 2; }
.img2gif-item-del { position: absolute; top: 2px; right: 2px; background: rgba(0,0,0,0.6); border: none; color: #ff6b6b; width: 20px; height: 20px; border-radius: 50%; cursor: pointer; font-size: 14px; line-height: 1; display: flex; align-items: center; justify-content: center; z-index: 2; opacity: 0; transition: opacity 0.15s; }
.img2gif-item:hover .img2gif-item-del { opacity: 1; }

/* 预览弹窗 */
.img2gif-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.75); z-index: 200; display: flex; align-items: center; justify-content: center; }
.img2gif-preview-box { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; max-width: 90vw; }
.img2gif-preview-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.img2gif-preview-canvas { display: block; max-width: 500px; max-height: 400px; border-radius: var(--radius); }

/* ============================================================
   工具：多图拼合
   ============================================================ */
.collage-wrap { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: start; }
.collage-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.collage-section { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.collage-section:last-child { border-bottom: none; margin-bottom: 0; }
.collage-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }

.collage-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 24px 16px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.collage-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.collage-upload-drag { border-color: var(--green); background: var(--green-bg-6); }

/* 缩略图 */
.collage-thumbs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.collage-thumb-item { position: relative; width: 52px; height: 52px; border-radius: 4px; overflow: hidden; border: 1px solid var(--border); }
.collage-thumb-item img { width: 100%; height: 100%; object-fit: cover; }
.collage-thumb-num { position: absolute; bottom: 0; left: 0; right: 0; background: rgba(0,0,0,0.6); color: var(--green); font-size: 10px; font-family: var(--font-mono); text-align: center; }
.collage-thumb-del { position: absolute; top: 0; right: 0; background: rgba(0,0,0,0.6); border: none; color: #ff6b6b; width: 16px; height: 16px; font-size: 11px; cursor: pointer; line-height: 1; opacity: 0; transition: opacity 0.15s; }
.collage-thumb-item:hover .collage-thumb-del { opacity: 1; }

/* 模板按钮 */
.collage-template-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.collage-tpl-btn { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 6px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; cursor: pointer; transition: all 0.2s; }
.collage-tpl-btn:hover { border-color: var(--green); }
.collage-tpl-btn.active { border-color: var(--green); background: var(--green-bg-6); }
.collage-tpl-icon { font-size: 24px; color: var(--green); }
.collage-tpl-name { font-size: 11px; color: var(--text-dim); }
.collage-tpl-btn.active .collage-tpl-name { color: var(--green); }
.heart-size-btns { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 4px; margin-top: 4px; }
.heart-size-btn { padding: 8px 0; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; cursor: pointer; color: var(--text-dim); font-size: 12px; transition: all 0.2s; }
.heart-size-btn:hover { border-color: var(--green); }
.heart-size-btn.active { border-color: var(--green); background: var(--green-bg-6); color: var(--green); }

/* 通用组件 */
.collage-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.collage-val { font-size: 11px; color: var(--green); font-family: var(--font-mono); float: right; }
.collage-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.collage-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }
.collage-color { width: 32px; height: 28px; border: 1px solid var(--border); border-radius: 4px; cursor: pointer; padding: 2px; background: var(--bg2); }
.collage-color-row { display: flex; align-items: center; gap: 4px; margin-top: 2px; }
.collage-color-dot { display: inline-block; width: 18px; height: 18px; border-radius: 50%; cursor: pointer; border: 2px solid var(--border); flex-shrink: 0; transition: border-color 0.15s; }
.collage-color-dot:hover { border-color: var(--green); }
.collage-color-dot.active { border-color: var(--green); box-shadow: 0 0 6px var(--green-bg-50); }

/* 预览区 */
.collage-preview-area { position: sticky; top: 80px; }
.collage-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.collage-preview-info { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.collage-canvas-wrap { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; min-height: 320px; overflow: auto; }
.collage-canvas-wrap canvas { display: block; border-radius: var(--radius); }
.collage-canvas-empty { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; }

/* ─── SVG 工具通用 ─── */
.svg-tool-wrap { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: start; }
.svg-tool-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.svg-tool-main { min-width: 0; }
.svg-tool-section { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.svg-tool-section:last-child { border-bottom: none; margin-bottom: 0; }
.svg-tool-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.svg-tool-val { font-size: 11px; color: var(--green); font-family: var(--font-mono); float: right; }
.svg-tool-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.svg-tool-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }

/* 上传区 */
.svg-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 20px 12px; text-align: center; cursor: pointer; transition: border-color 0.2s,background 0.2s; display: flex; flex-direction: column; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.svg-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.svg-upload-drag { border-color: var(--green); background: var(--green-bg-6); }

/* 代码输入框 */
.svg-code-textarea { width: calc(100% - 20px); background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 12px; font-family: var(--font-mono); padding: 10px; resize: vertical; min-height: 80px; }
.svg-code-textarea:focus { border-color: var(--green); outline: none; }

/* 缩放行 */
.svg-zoom-row { display: flex; align-items: center; gap: 6px; }
.svg-zoom-val { font-size: 13px; color: var(--green); font-family: var(--font-mono); min-width: 44px; text-align: center; }

/* 信息面板 */
.svg-info { display: grid; gap: 6px; }
.svg-info-row { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-dim); }
.svg-info-row span:last-child { color: var(--text); font-family: var(--font-mono); }

/* Tab 切换 */
.svg-tool-tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 12px; }
.svg-tab { padding: 8px 18px; background: none; border: none; cursor: pointer; color: var(--text-dim); font-size: 13px; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.2s; }
.svg-tab:hover { color: var(--text); }
.svg-tab.active { color: var(--green); border-bottom-color: var(--green); }

/* 预览区 */
.svg-preview-wrap { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); min-height: 360px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.svg-preview-inner { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; transition: transform 0.15s; }
.svg-preview-empty { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; pointer-events: none; }

/* 源码 */
.svg-source-pre { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; font-size: 12px; font-family: var(--font-mono); color: var(--text); white-space: pre-wrap; word-break: break-all; max-height: 500px; overflow-y: auto; line-height: 1.6; }

/* ─── SVG 转换特有 ─── */
.convert-format-tabs { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 4px; }
.convert-format-tab { padding: 8px 0; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; cursor: pointer; color: var(--text-dim); font-size: 12px; transition: all 0.2s; }
.convert-format-tab:hover { border-color: var(--green); }
.convert-format-tab.active { border-color: var(--green); background: var(--green-bg-6); color: var(--green); }

.convert-size-row { display: flex; align-items: flex-end; gap: 6px; }
.convert-size-group { display: flex; flex-direction: column; flex: 1; }
.convert-size-label { font-size: 11px; color: var(--text-dim); margin-bottom: 2px; }
.convert-size-input { width: calc(100% - 12px); background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; color: var(--text); font-size: 13px; padding: 6px 8px; font-family: var(--font-mono); }
.convert-size-input:focus { border-color: var(--green); outline: none; }
.convert-size-x { font-size: 14px; color: var(--text-dim); padding-bottom: 6px; }
.convert-size-hint { font-size: 11px; color: var(--text-dim); margin-top: 4px; }

.convert-check { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-dim); margin-top: 6px; cursor: pointer; }
.convert-check input { accent-color: var(--green); }

/* ─── SVG 工具响应式 ─── */
@media (max-width: 1024px) {
  .svg-tool-wrap { grid-template-columns: 1fr; }
  .svg-tool-panel { max-height: none; }
}

/* ============================================================
   二维码生成器（左右分栏布局）
   ============================================================ */
.qr-gen-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 20px; align-items: start; }
.qr-gen-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; max-height: calc(100vh - 140px); overflow-y: auto; }
.qr-gen-section { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.qr-gen-section:last-of-type { border-bottom: none; margin-bottom: 8px; }
.qr-gen-section-title { font-size: 12px; font-weight: 600; color: var(--text); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.qr-gen-preview { position: sticky; top: 80px; }
.qr-gen-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.qr-gen-preview-wrap { display: flex; justify-content: center; align-items: center; min-height: 300px; padding: 24px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); }

/* ============================================================
   图片马赛克工具
   ============================================================ */
.mosaic-wrap { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: start; }
.mosaic-panel { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; max-height: calc(100vh - 140px); overflow-y: auto; }
.mosaic-section { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.mosaic-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.mosaic-section-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.mosaic-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 28px 16px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.mosaic-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.mosaic-upload-drag { border-color: var(--green); background: var(--green-bg-6); }
.mosaic-upload span { display: block; font-size: 13px; color: var(--text-dim); }
.mosaic-tabs { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.mosaic-tab { flex: 1; background: var(--bg2); border: none; padding: 8px 0; color: var(--text-dim); font-size: 13px; cursor: pointer; transition: all 0.2s; }
.mosaic-tab:hover { color: var(--text); }
.mosaic-tab.active { background: var(--green); color: #000; font-weight: 600; }
.mosaic-hint { font-size: 11px; color: var(--text-dark); margin-top: 8px; line-height: 1.5; }
.mosaic-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.mosaic-val { font-size: 11px; color: var(--green); font-family: var(--font-mono); float: right; }
.mosaic-range { width: 100%; -webkit-appearance: none; height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer; }
.mosaic-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; }
.mosaic-range::-moz-range-thumb { width: 14px; height: 14px; background: var(--green); border-radius: 50%; cursor: pointer; border: none; }
.mosaic-preset-btns { display: flex; gap: 6px; margin-top: 10px; }
.mosaic-preset-btns .btn { flex: 1; }
.mosaic-select { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; cursor: pointer; }
.mosaic-select:focus { border-color: var(--green); }
.mosaic-stat { font-size: 12px; color: var(--text-dim); font-family: var(--font-mono); }
.mosaic-preview-area { position: sticky; top: 80px; }
.mosaic-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.mosaic-info { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.mosaic-canvas-wrap { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; min-height: 320px; overflow: hidden; }
.mosaic-canvas-wrap canvas { display: block; max-width: 100%; user-select: none; -webkit-user-drag: none; }
.mosaic-canvas-empty { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; text-align: center; padding: 0 16px; }

/* ============================================================
   拼豆图案生成器
   ============================================================ */
.perler-wrap { display: grid; grid-template-columns: 280px 1fr; gap: 20px; align-items: start; }
.perler-panel { display: flex; flex-direction: column; gap: 2px; }

/* ── 步骤折叠面板 ── */
.perler-step { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: border-color 0.2s; }
.perler-step + .perler-step { margin-top: 8px; }
.perler-step.active { border-color: var(--border-hover); }
.perler-step-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; cursor: pointer; user-select: none; transition: background 0.15s; }
.perler-step-head:hover { background: var(--green-bg-6); }
.perler-step-num { display: flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); font-size: 11px; font-weight: 700; color: var(--text-dim); flex-shrink: 0; transition: all 0.2s; }
.perler-step.active .perler-step-num { background: var(--green); color: #000; border-color: var(--green); }
.perler-step-title { font-size: 13px; font-weight: 600; color: var(--text); flex: 1; }
.perler-step-arrow { color: var(--text-dim); transition: transform 0.2s; flex-shrink: 0; }
.perler-step.active .perler-step-arrow { transform: rotate(180deg); }
.perler-step-body { display: none; padding: 0 14px 14px; }
.perler-step.active .perler-step-body { display: block; animation: pdFadeIn 0.2s ease; }
@keyframes pdFadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }

/* ── 上传区 ── */
.perler-upload { border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 24px 16px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.perler-upload:hover { border-color: var(--green); background: var(--green-bg-6); }
.perler-upload-drag { border-color: var(--green); background: var(--green-bg-6); }
.perler-upload span { display: block; font-size: 13px; color: var(--text-dim); margin-top: 6px; }
.perler-upload-sub { font-size: 11px !important; color: var(--text-dark) !important; margin-top: 4px !important; }
.perler-step-actions { display: flex; gap: 8px; margin-top: 8px; }
.perler-step-actions .btn { flex: 1; justify-content: center; }

/* ── 表单控件 ── */
.perler-field-row { margin-bottom: 10px; }
.perler-field-label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.perler-size-row { display: flex; align-items: center; gap: 8px; }
.perler-num-input { width: 70px; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 7px 8px; color: var(--text); font-size: 13px; font-family: var(--font-mono); outline: none; text-align: center; }
.perler-num-input:focus { border-color: var(--green); }
.perler-times { color: var(--text-dim); font-size: 14px; }
.perler-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.perler-chip { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 4px 12px; font-size: 12px; font-family: var(--font-mono); color: var(--text-dim); cursor: pointer; transition: all 0.15s; }
.perler-chip:hover { border-color: var(--green); color: var(--text); }
.perler-chip.active { background: var(--green); color: #000; border-color: var(--green); font-weight: 600; }
.perler-select { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 8px 10px; color: var(--text); font-size: 13px; outline: none; cursor: pointer; }
.perler-select:focus { border-color: var(--green); }
.perler-palette-strip { display: flex; flex-wrap: wrap; gap: 3px; margin-top: 8px; padding: 8px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); max-height: 80px; overflow-y: auto; }
.perler-swatch { width: 14px; height: 14px; border-radius: 3px; border: 1px solid var(--border-subtle); }

/* ── 生成选项 ── */
.perler-toggle-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.perler-toggle-item { display: flex; align-items: flex-start; gap: 8px; padding: 8px 10px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: border-color 0.15s; }
.perler-toggle-item:hover { border-color: var(--border-hover); }
.perler-toggle-item input { accent-color: var(--green); width: 15px; height: 15px; margin-top: 2px; cursor: pointer; flex-shrink: 0; }
.perler-toggle-text { font-size: 13px; color: var(--text); font-weight: 500; }
.perler-toggle-desc { display: block; font-size: 11px; color: var(--text-dark); margin-top: 2px; }
.perler-generate-btn { width: 100%; justify-content: center; gap: 6px; }

/* ── 导出 ── */
.perler-export-btn { width: 100%; justify-content: center; gap: 6px; margin-bottom: 8px; }
.perler-export-btn:last-child { margin-bottom: 0; }

/* ── 预览区 ── */
.perler-preview-area { position: sticky; top: 80px; }
.perler-preview-header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.perler-tab-group { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.perler-tab { background: var(--bg2); border: none; padding: 7px 14px; color: var(--text-dim); font-size: 13px; cursor: pointer; transition: all 0.2s; }
.perler-tab:hover { color: var(--text); }
.perler-tab.active { background: var(--green); color: #000; font-weight: 600; }
.perler-toolbar { display: flex; gap: 4px; }
.perler-icon-btn { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-dim); cursor: pointer; transition: all 0.15s; }
.perler-icon-btn:hover { border-color: var(--border-hover); color: var(--text); }
.perler-icon-btn.active { background: var(--green); color: #000; border-color: var(--green); }
.perler-info { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); margin-left: auto; }

/* ── 浮动编辑工具栏 ── */
.perler-edit-bar { display: flex; align-items: center; gap: 12px; background: var(--bg3); border: 1px solid var(--border-hover); border-radius: var(--radius); padding: 8px 12px; margin-bottom: 10px; box-shadow: 0 2px 12px rgba(0,0,0,0.2); flex-wrap: wrap; }
.perler-edit-bar-left { display: flex; gap: 4px; flex-shrink: 0; }
.perler-tool-btn { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-dim); cursor: pointer; transition: all 0.15s; }
.perler-tool-btn:hover { border-color: var(--border-hover); color: var(--text); }
.perler-tool-btn.active { background: var(--green); color: #000; border-color: var(--green); }
.perler-edit-bar-colors { display: flex; flex-wrap: wrap; gap: 4px; flex: 1; max-height: 36px; overflow-y: auto; }
.perler-swatch-lg { width: 22px; height: 22px; border-radius: 4px; border: 2px solid transparent; cursor: pointer; transition: transform 0.12s, border-color 0.12s; flex-shrink: 0; }
.perler-swatch-lg:hover { transform: scale(1.18); }
.perler-swatch-lg.selected { border-color: var(--green); box-shadow: var(--green-glow); }

/* ── 画布 ── */
.perler-canvas-wrap { position: relative; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; min-height: 320px; overflow: auto; padding: 8px; }
.perler-canvas-wrap canvas { display: block; max-width: 100%; user-select: none; -webkit-user-drag: none; }
.perler-canvas-empty { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; text-align: center; padding: 0 16px; }

/* ── 颜色统计 ── */
.perler-stats-wrap { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.perler-stats-summary { display: flex; gap: 20px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 14px; font-size: 13px; color: var(--text-dim); }
.perler-stats-summary strong { color: var(--green); font-family: var(--font-mono); font-size: 16px; }
.perler-stats-list { display: flex; flex-direction: column; gap: 6px; max-height: 500px; overflow-y: auto; }
.perler-stat-item { display: flex; align-items: center; gap: 10px; padding: 6px 8px; background: var(--bg2); border-radius: var(--radius); border: 1px solid var(--border-subtle); font-size: 12px; }
.perler-stat-num { display: flex; align-items: center; justify-content: center; min-width: 26px; height: 26px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); font-size: 12px; font-weight: 700; color: var(--green); font-family: var(--font-mono); flex-shrink: 0; }
.perler-stat-color { width: 22px; height: 22px; border-radius: 4px; border: 1px solid var(--border-subtle); flex-shrink: 0; }
.perler-stat-name { color: var(--text); font-weight: 500; min-width: 60px; }
.perler-stat-code { color: var(--text-dim); font-family: var(--font-mono); font-size: 11px; min-width: 50px; }
.perler-stat-count { color: var(--green); font-family: var(--font-mono); font-weight: 600; min-width: 60px; text-align: right; }
.perler-stat-bar { flex: 1; height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; min-width: 60px; }
.perler-stat-bar-fill { height: 100%; border-radius: 4px; transition: width 0.3s ease; }
.perler-stat-pct { color: var(--text-dim); font-family: var(--font-mono); font-size: 11px; min-width: 40px; text-align: right; }

/* ============================================================
   数学计算工具通用样式
   ============================================================ */
.math-wrap { max-width: 760px; }
.math-card { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; margin-bottom: 16px; }
.math-card-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; display: flex; align-items: center; gap: 6px; }
.math-input-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.math-input-row .form-control { flex: 1; min-width: 120px; }
.math-input-tag { display: inline-flex; align-items: center; gap: 4px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 10px; font-size: 13px; font-family: var(--font-mono); color: var(--text); }
.math-input-tag .math-tag-remove { cursor: pointer; color: var(--text-dim); font-size: 14px; line-height: 1; }
.math-input-tag .math-tag-remove:hover { color: #ff4444; }
.math-tags-wrap { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); min-height: 42px; align-items: center; }
.math-tags-empty { color: var(--text-dark); font-size: 12px; }
.math-result { background: var(--bg2); border: 1px solid var(--border); border-left: 3px solid var(--green); border-radius: var(--radius); padding: 14px 16px; margin-top: 12px; }
.math-result-label { font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.math-result-value { font-size: 22px; font-weight: 700; color: var(--green); font-family: var(--font-mono); word-break: break-all; line-height: 1.4; }
.math-result-value-sm { font-size: 15px; font-weight: 600; color: var(--green); font-family: var(--font-mono); word-break: break-all; }
.math-formula { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin-top: 10px; font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); line-height: 1.8; }
.math-formula .step { padding: 2px 0; }
.math-formula .step .arrow { color: var(--green); margin: 0 6px; }
.math-formula .highlight { color: var(--text); font-weight: 600; }
.math-tabs { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 14px; }
.math-tab { flex: 1; background: var(--bg2); border: none; padding: 8px 0; color: var(--text-dim); font-size: 13px; cursor: pointer; transition: all 0.2s; text-align: center; }
.math-tab:hover { color: var(--text); }
.math-tab.active { background: var(--green); color: #000; font-weight: 600; }
.math-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.math-seq-list { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; max-height: 280px; overflow-y: auto; font-family: var(--font-mono); font-size: 13px; line-height: 1.8; }
.math-seq-item { display: flex; justify-content: space-between; padding: 2px 6px; border-radius: 3px; }
.math-seq-item:nth-child(odd) { background: var(--green-bg-6); }
.math-seq-item .idx { color: var(--text-dim); }
.math-seq-item .val { color: var(--green); font-weight: 600; }
.math-hint { font-size: 12px; color: var(--text-dark); margin-top: 6px; line-height: 1.5; }
.math-stat { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }
.math-stat-item { font-size: 12px; color: var(--text-dim); }
.math-stat-item span { color: var(--green); font-weight: 600; font-family: var(--font-mono); }
.math-empty { color: var(--text-dark); font-size: 13px; text-align: center; padding: 24px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .sidebar { display: none; }
  .sidebar-expand-btn { display: none !important; }
  .json-editor-wrap { grid-template-columns: 1fr; }
  .json-viewer-wrap { grid-template-columns: 1fr; }
  .resize-preview-wrap { grid-template-columns: 1fr; }
  .screenshot-wrap { grid-template-columns: 1fr; }
  .watermark-wrap { grid-template-columns: 1fr; }
  .watermark-panel { max-height: none; }
  .watermark-preview-area { position: static; }
  .upscale-wrap { grid-template-columns: 1fr; }
  .upscale-panel { max-height: none; }
  .upscale-preview-area { position: static; }
  .collage-wrap { grid-template-columns: 1fr; }
  .collage-panel { max-height: none; }
  .collage-preview-area { position: static; }
  .mosaic-wrap { grid-template-columns: 1fr; }
  .mosaic-panel { max-height: none; }
  .mosaic-preview-area { position: static; }
  .perler-wrap { grid-template-columns: 1fr; }
  .perler-preview-area { position: static; }
  .diff-view { grid-template-columns: 1fr; }
  .math-grid { grid-template-columns: 1fr; }
  .qr-gen-wrap { grid-template-columns: 1fr; }
  .qr-gen-panel { max-height: none; }
  .qr-gen-preview { position: static; }
}

/* ── 文件工具通用样式 ── */
.file-drop-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--bg2);
}
.file-drop-zone:hover { border-color: var(--green); background: var(--bg3); }
.file-drop-zone.dragover { border-color: var(--green); background: var(--green-bg-6); }
.file-drop-zone svg { width: 40px; height: 40px; opacity: .4; margin-bottom: 8px; }
.file-drop-zone .file-drop-text { font-size: 14px; color: var(--text-dim); }
.file-drop-zone .file-drop-text strong { color: var(--green); }

.file-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 12px;
}
.file-table thead th {
  text-align: left;
  padding: 8px 10px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  white-space: nowrap;
  cursor: default;
  user-select: none;
}
.file-table thead th.sortable { cursor: pointer; }
.file-table thead th.sortable:hover { color: var(--green); }
.file-table thead th.sortable::after { content: ' ⇅'; font-size: 10px; opacity: .5; }
.file-table thead th.sortable.asc::after { content: ' ↑'; opacity: 1; color: var(--green); }
.file-table thead th.sortable.desc::after { content: ' ↓'; opacity: 1; color: var(--green); }
.file-table tbody td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  word-break: break-all;
}
.file-table tbody tr:hover { background: var(--bg3); }
.file-table tbody tr.duplicate { background: rgba(255,50,50,.08); }
.file-table tbody tr.duplicate td:first-child { color: #ff6b6b; }
.file-table .hash-cell {
  font-family: 'Courier New', monospace;
  font-size: 12px;
  color: var(--text-dim);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-table .hash-cell:hover { white-space: normal; word-break: break-all; }
.file-table .copy-btn {
  display: inline-block;
  cursor: pointer;
  opacity: .4;
  transition: opacity .15s;
  vertical-align: middle;
  margin-left: 4px;
}
.file-table .copy-btn:hover { opacity: 1; color: var(--green); }
.file-table .copy-btn svg { width: 13px; height: 13px; }

.file-progress {
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 4px;
}
.file-progress-bar {
  height: 100%;
  background: var(--green);
  border-radius: 2px;
  transition: width .3s;
}

.file-stat-bar {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 0;
  font-size: 13px;
  color: var(--text-dim);
}
.file-stat-bar .stat-item strong { color: var(--green); }

.file-line-numbers {
  display: flex;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  max-height: 500px;
  overflow: auto;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.file-line-numbers .line-numbers {
  flex-shrink: 0;
  padding: 12px 8px;
  text-align: right;
  background: var(--bg3);
  color: var(--text-dim);
  user-select: none;
  border-right: 1px solid var(--border);
  min-width: 50px;
}
.file-line-numbers .line-content {
  flex: 1;
  padding: 12px 12px;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
}
.file-line-numbers .line-content mark {
  background: var(--green-bg-20);
  color: var(--green);
  border-radius: 2px;
  padding: 0 1px;
}

.file-script-output {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  min-height: 200px;
  max-height: 500px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text);
}
.file-script-output .script-comment { color: var(--text-dim); }

/* ============================================================
   杂记/文章模块
   ============================================================ */

/* ---------- 侧边栏子分类缩进 ---------- */
.sidebar-nav a.sidebar-sub-item {
  padding-left: 28px;
  font-size: 12px;
}

/* ---------- 侧边栏热门文章 ---------- */
.sidebar-popular {
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
}
.sidebar-popular-item {
  display: flex !important;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 12px !important;
  border-left: 2px solid transparent !important;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.5;
  transition: all var(--transition);
  margin-bottom: 2px;
}
.sidebar-popular-item:hover {
  color: var(--green);
  background: var(--green-bg-6);
  border-left-color: var(--green) !important;
  text-shadow: none;
}
.sidebar-popular-num {
  color: var(--green);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 13px;
  flex-shrink: 0;
  min-width: 16px;
}
.sidebar-popular-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 文章面包屑 ---------- */
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-breadcrumb a {
  color: var(--text-dim);
  transition: color var(--transition);
}
.article-breadcrumb a:hover {
  color: var(--green);
  text-shadow: none;
}
.article-breadcrumb-sep {
  color: var(--text-dark);
}

/* ---------- 文章列表 ---------- */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 16px;
}
.article-card {
  display: block;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.article-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--green-bg-10);
}
.article-card:hover::before { transform: scaleX(1); }
.article-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.article-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card:hover .article-card-title {
  color: var(--green);
}
.article-card-summary {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  color: var(--text-dark);
  flex-wrap: wrap;
  margin-top: 4px;
}
.article-meta-cat {
  color: var(--green);
  background: var(--green-bg-8);
  border: 1px solid var(--border);
  padding: 1px 8px;
  border-radius: 3px;
  font-size: 11px;
}
.article-meta-date {
  color: var(--text-dim);
}
.article-meta-views {
  color: var(--text-dim);
}
.article-meta-tag {
  color: var(--text-dim);
  background: var(--bg3);
  padding: 1px 6px;
  border-radius: 2px;
  font-size: 10px;
}

/* ---------- 文章空状态 ---------- */
.article-empty {
  text-align: center;
  padding: 80px 0;
  color: var(--text-dark);
}

/* ---------- 分页 ---------- */
.article-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg2);
  color: var(--text-dim);
  font-size: 13px;
  transition: all var(--transition);
  cursor: pointer;
}
.page-btn:hover {
  border-color: var(--border-hover);
  color: var(--green);
  background: var(--green-bg-6);
  text-shadow: none;
}
.page-btn-active {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-bg-10);
  text-shadow: var(--green-glow);
}
.page-ellipsis {
  color: var(--text-dark);
  padding: 0 4px;
}

/* ---------- 文章详情页 ---------- */
.article-detail-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}
.article-detail-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
  font-family: var(--font-main);
}
.article-detail-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.article-detail-tags {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.article-tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--green-bg-8);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--green);
  font-size: 11px;
  transition: all var(--transition);
}
.article-tag:hover {
  background: var(--green-bg-15);
  border-color: var(--border-hover);
}

/* ---------- 文章正文内容 ---------- */
.article-content {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text);
  font-weight: 700;
  margin-top: 28px;
  margin-bottom: 14px;
  line-height: 1.3;
}
.article-content h1 { font-size: 24px; }
.article-content h2 {
  font-size: 20px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}
.article-content h3 { font-size: 17px; }
.article-content h4 { font-size: 15px; }
.article-content p {
  margin-bottom: 14px;
}
.article-content a {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: var(--green-bg-30);
  text-underline-offset: 2px;
}
.article-content a:hover {
  text-decoration-color: var(--green);
  text-shadow: none;
}
.article-content ul,
.article-content ol {
  margin: 0 0 14px 0;
  padding-left: 24px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: 6px;
  line-height: 1.7;
}
.article-content blockquote {
  margin: 14px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--green);
  background: var(--green-bg-6);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  margin: 14px 0;
  font-size: 13px;
  line-height: 1.6;
}
.article-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}
.article-content p code,
.article-content li code {
  background: var(--bg3);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--green);
}
.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
}
.article-content img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 14px 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 13px;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.article-content th {
  background: var(--bg3);
  font-weight: 700;
  color: var(--text);
}
.article-content td {
  color: var(--text-dim);
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 24px 0;
}
.article-content strong {
  color: var(--text);
  font-weight: 700;
}

/* ---------- 文章底部 ---------- */
.article-footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.article-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 13px;
  transition: all var(--transition);
}
.article-back-btn:hover {
  border-color: var(--border-hover);
  color: var(--green);
  background: var(--green-bg-6);
}

/* ---------- 相关文章 ---------- */
.article-related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.article-related-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.article-related-item:hover {
  border-color: var(--border-hover);
  background: var(--green-bg-6);
}
.article-related-title {
  font-size: 14px;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-related-item:hover .article-related-title {
  color: var(--green);
}
.article-related-date {
  font-size: 11px;
  color: var(--text-dark);
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .math-grid { grid-template-columns: 1fr; }
  .file-table { font-size: 12px; }
  .file-table .hash-cell { max-width: 120px; }
}
@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .navbar-search input { width: 160px; }
  .navbar-search input:focus { width: 200px; }
  .hero-title { font-size: 28px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .article-list { grid-template-columns: 1fr !important; }
  .article-content { padding: 16px !important; }
}