/* ===== variables.css ===== */
/* ============================================================
   variables.css — 全站设计变量（唯一颜色来源，禁止在组件中硬编码颜色）
   浅色为默认主题，[data-theme="dark"] 为深色主题
   ============================================================ */

:root {
  /* 品牌主色：低饱和度蓝 */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-active: #1e40af;
  --color-primary-soft: #eff6ff;
  --color-primary-border: #bfdbfe;

  /* 页面与卡片 */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-inset: #f8fafc;
  --bg-hover: #f1f5f9;
  --bg-code: #f8fafc;
  --bg-overlay: rgba(15, 23, 42, 0.45);

  /* 文本 */
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-on-primary: #ffffff;

  /* 边框与分割线 */
  --border: #e2e8f0;
  --border-strong: #cbd5e1;

  /* 状态色 */
  --success: #16a34a;
  --success-soft: #f0fdf4;
  --error: #dc2626;
  --error-soft: #fef2f2;
  --warning: #d97706;
  --warning-soft: #fffbeb;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 999px;

  /* 阴影（轻量） */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  /* 字体（系统字体栈，不依赖外部字体服务） */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  /* 字号 */
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 14px;
  --fs-lg: 16px;
  --fs-xl: 18px;
  --fs-2xl: 22px;
  --fs-3xl: 28px;

  /* 布局尺寸 */
  --header-height: 60px;
  --sidebar-width: 232px;
  --content-max: 860px;
  --content-max-wide: 1080px;

  /* 动效 */
  --transition: 160ms ease;
}

/* 深色主题 */
[data-theme="dark"] {
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-primary-active: #2563eb;
  --color-primary-soft: rgba(59, 130, 246, 0.14);
  --color-primary-border: rgba(96, 165, 250, 0.35);

  --bg-page: #0b1220;
  --bg-card: #111c2e;
  --bg-subtle: #1a2942;
  --bg-inset: #0e1830;
  --bg-hover: #1a2942;
  --bg-code: #0e1830;
  --bg-overlay: rgba(2, 6, 23, 0.6);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-on-primary: #ffffff;

  --border: #24344f;
  --border-strong: #33455f;

  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.12);
  --error: #f87171;
  --error-soft: rgba(248, 113, 113, 0.12);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.12);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
}


/* ===== global.css ===== */
/* ============================================================
   global.css — 重置、排版、基础元素（按钮 / 输入框 / 标签）
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  color-scheme: light dark;
  /* Safari 刘海屏安全区 */
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}

html[data-theme='light'] {
  color-scheme: light;
}

html[data-theme='dark'] {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

p {
  margin: 0 0 12px;
}

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

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

img, svg, canvas {
  max-width: 100%;
}

code, kbd, pre {
  font-family: var(--font-mono);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  font-size: var(--fs-md);
  font-family: inherit;
  line-height: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition),
    color var(--transition), box-shadow var(--transition);
  user-select: none;
}

.btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.btn:active {
  transform: translateY(0.5px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn svg {
  width: 15px;
  height: 15px;
  flex: none;
}

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--text-on-primary);
  font-weight: 500;
}

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

.btn-danger {
  color: var(--error);
  border-color: var(--error);
  background: transparent;
}

.btn-danger:hover {
  background: var(--error-soft);
  border-color: var(--error);
}

.btn-ghost {
  border-color: transparent;
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-sm {
  height: 30px;
  padding: 0 10px;
  font-size: var(--fs-sm);
}

.btn-block {
  width: 100%;
}

/* ---------- 表单 ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.input,
.textarea,
.select {
  width: 100%;
  font-family: inherit;
  font-size: var(--fs-md);
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.textarea {
  resize: vertical;
  line-height: 1.6;
  min-height: 96px;
}

.textarea[readonly] {
  background: var(--bg-inset);
  color: var(--text-primary);
}

.select {
  cursor: pointer;
  height: 36px;
  padding: 0 8px;
}

/* ---------- 复选 / 开关 ---------- */
.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-md);
  cursor: pointer;
  user-select: none;
  color: var(--text-primary);
}

.check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex: none;
}

.check-inline-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

/* ---------- 徽标 / 标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 22px;
  padding: 0 8px;
  font-size: var(--fs-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: var(--color-primary-border);
}

.badge-success {
  background: var(--success-soft);
  color: var(--success);
  border-color: transparent;
}

.badge-error {
  background: var(--error-soft);
  color: var(--error);
  border-color: transparent;
}

/* ---------- 工具类 ---------- */
.text-secondary { color: var(--text-secondary); }
.text-sm { font-size: var(--fs-sm); }
.text-xs { font-size: var(--fs-xs); }
.mono { font-family: var(--font-mono); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.hidden { display: none !important; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* 滚动条（桌面端） */
@media (pointer: fine) {
  ::-webkit-scrollbar {
    width: 10px;
    height: 10px;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-page);
  }
  ::-webkit-scrollbar-track {
    background: transparent;
  }
}


/* ===== layout.css ===== */
/* ============================================================
   layout.css — 整站框架：头部 / 侧边栏 / 主内容 / 页脚
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: var(--header-height);
  max-width: var(--content-max-wide);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  flex: none;
  letter-spacing: 0.2px;
}

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

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.logo-mark svg {
  width: 17px;
  height: 17px;
}

.logo-mark-sm {
  width: 26px;
  height: 26px;
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.footer-brand {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: none;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 11px;
  font-size: var(--fs-md);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.main-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 500;
}

.header-search {
  flex: 1;
  min-width: 0;
  max-width: 420px;
  margin-left: auto;
  position: relative;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: none;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  transition: background var(--transition), color var(--transition);
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.icon-btn .fav-count {
  position: absolute;
  top: 2px;
  right: 0;
  min-width: 15px;
  height: 15px;
  padding: 0 3px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  line-height: 15px;
  text-align: center;
  font-weight: 600;
}

.menu-toggle {
  display: none;
}

/* 抽屉与遮罩仅移动端使用，桌面端彻底隐藏 */
.drawer,
.drawer-mask {
  display: none;
}

/* ---------- 主体布局 ---------- */
.site-body {
  flex: 1;
  width: 100%;
  max-width: var(--content-max-wide);
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.sidebar {
  width: var(--sidebar-width);
  flex: none;
  position: sticky;
  top: calc(var(--header-height) + 24px);
  max-height: calc(100vh - var(--header-height) - 48px);
  overflow-y: auto;
  padding-right: 4px;
}

.sidebar-section + .sidebar-section {
  margin-top: 20px;
}

.sidebar-title {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-tertiary);
  padding: 0 10px;
  margin-bottom: 6px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--fs-md);
  transition: background var(--transition), color var(--transition);
}

.sidebar-link:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 500;
}

.sidebar-link svg {
  width: 16px;
  height: 16px;
  flex: none;
  color: var(--text-tertiary);
}

.sidebar-link.active svg {
  color: var(--color-primary);
}

.sidebar-link .count {
  margin-left: auto;
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

.main-content {
  flex: 1;
  min-width: 0;
  max-width: var(--content-max);
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  padding: 28px 20px;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--content-max-wide);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  width: 100%;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-note {
  max-width: none;
  width: 100%;
  line-height: 1.7;
  margin: 0;
}


/* ===== components.css ===== */
/* ============================================================
   components.css — 首页区块 / 工具页 / 搜索 / 提示等组件
   ============================================================ */

/* ---------- 首页 Hero ---------- */
.hero {
  text-align: center;
  padding: 40px 0 8px;
}

.hero h1 {
  font-size: var(--fs-3xl);
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.hero-sub {
  color: var(--text-secondary);
  font-size: var(--fs-lg);
  margin-bottom: 24px;
}

.hero-search {
  max-width: 560px;
  margin: 0 auto 14px;
  position: relative;
}

.hero-search .input {
  height: 46px;
  font-size: var(--fs-lg);
  padding: 0 16px 0 42px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

.hero-search .search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

.hero-tags a,
.hero-tags button {
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.hero-tags a:hover,
.hero-tags button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- 区块 ---------- */
.section {
  margin-top: 44px;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.section:first-child {
  margin-top: 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: var(--fs-xl);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-head .more {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.section-head .more:hover {
  color: var(--color-primary);
}

.section-head .more-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font: inherit;
}

/* 分类标题：与「收藏的工具」同字号；与上方卡片间距适中 */
.tool-cat-title {
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 16px;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.tool-cat-title.is-first {
  margin-top: 0;
}

#all-tools {
  margin-top: 32px;
}

.doc-actions {
  margin-top: 14px;
}

.tool-head-text {
  min-width: 0;
}

.search-result-text {
  min-width: 0;
  flex: 1;
}

.input-hint {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  margin-top: 6px;
  text-align: right;
}

.field-full {
  width: 100%;
}

.category-card .badge {
  margin-left: auto;
}

.section-empty {
  padding: 20px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  text-align: center;
  background: var(--bg-card);
}

/* ---------- 工具卡片网格 ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition),
    transform var(--transition);
  color: var(--text-primary);
  height: 100%;
}

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

.tool-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.tool-icon {
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 9px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tool-icon svg {
  width: 19px;
  height: 19px;
}

.tool-card-name {
  font-weight: 600;
  font-size: var(--fs-md);
  min-width: 0;
  overflow-wrap: anywhere;
}

.tool-card-desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-card-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.fav-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.fav-btn:hover {
  color: var(--warning);
  background: var(--bg-hover);
}

.fav-btn.faved {
  color: var(--warning);
}

.fav-btn svg {
  width: 16px;
  height: 16px;
}

/* ---------- 分类入口 ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}

.category-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.category-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
}

.category-card .tool-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
}

.category-card .tool-icon svg {
  width: 22px;
  height: 22px;
}

.category-name {
  font-weight: 600;
}

.category-desc {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
}

/* ---------- 搜索建议下拉 ---------- */
.search-panel {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: none;
  z-index: 200;
}

.search-panel.open {
  display: block;
}

.search-result {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--fs-md);
  font-family: inherit;
}

.search-result:hover,
.search-result.active {
  background: var(--bg-hover);
}

.search-result .tool-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.search-result .tool-icon svg {
  width: 15px;
  height: 15px;
}

.search-result-name {
  font-weight: 500;
}

.search-result-desc {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-empty {
  padding: 14px;
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.breadcrumb .sep {
  color: var(--text-tertiary);
}

.breadcrumb .current {
  color: var(--text-primary);
}

/* ---------- 工具页 ---------- */
.tool-head {
  margin-bottom: 18px;
}

.tool-head-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.tool-head .tool-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  flex: none;
}

.tool-head .tool-icon svg {
  width: 24px;
  height: 24px;
}

.tool-title {
  font-size: var(--fs-2xl);
  margin-bottom: 4px;
}

.tool-intro {
  color: var(--text-secondary);
  margin: 0;
}

.tool-fav-head {
  position: static;
  margin-left: auto;
  flex: none;
  width: 34px;
  height: 34px;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.panel + .panel {
  margin-top: 16px;
}

.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.panel-title-row .panel-title {
  margin-bottom: 0;
}

.panel-title {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 分段按钮：方向/模式一键切换 */
.segmented {
  display: inline-flex;
  flex-wrap: nowrap;
  flex-shrink: 0;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
}

.segmented-btn {
  -webkit-appearance: none;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--fs-sm);
  padding: 6px 12px;
  cursor: pointer;
  border-right: 1px solid var(--border);
  transition: background var(--transition), color var(--transition);
}

.segmented-btn:last-child {
  border-right: none;
}

.segmented-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.segmented-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 600;
}

.segment-field {
  align-items: center;
}

/* 带说明的分段选项：标签+按钮一行，说明独占下一行，避免挤乱 */
.options-bar .segment-field {
  flex-wrap: wrap;
  align-items: center;
  max-width: 100%;
}

.options-bar .segment-field .field-hint {
  flex: 1 1 100%;
  width: 100%;
  margin-top: 2px;
  padding-left: 0;
}

.preset-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset-btn {
  background: var(--bg-card);
}

.stats-bar-top {
  margin: 0 0 14px;
  padding: 14px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.textarea.copied-flash,
.json-view.copied-flash {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.textarea.result-flash,
.json-view.result-flash {
  animation: result-flash-pulse 0.45s ease;
}

@keyframes result-flash-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.35);
  }
  100% {
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0);
  }
}

.field-hint {
  margin-top: 6px;
  font-size: var(--fs-xs, 12px);
  color: var(--text-secondary);
  line-height: 1.45;
  max-width: 52rem;
}

.regex-view mark.regex-hit,
.regex-highlight mark.regex-hit {
  background: rgba(37, 99, 235, 0.22);
  color: inherit;
  padding: 0 1px;
  border-radius: 2px;
}

.regex-error {
  color: var(--error);
}

.regex-groups {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: var(--fs-sm);
}

.regex-groups-title {
  font-weight: 600;
  margin-bottom: 8px;
}

.regex-match-item {
  margin-bottom: 8px;
  line-height: 1.5;
}

.regex-caps {
  color: var(--text-secondary);
  margin-top: 2px;
}

.color-preview-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.color-swatch {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  flex: none;
  box-shadow: var(--shadow-sm);
}

.color-formats {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: var(--fs-sm);
}

.color-formats code {
  font-family: var(--font-mono);
}

.jwt-block {
  margin-bottom: 14px;
}

.jwt-label {
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.jwt-block pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.ib-preview {
  margin-top: 12px;
  padding: 12px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border);
  text-align: center;
  min-height: 80px;
}

.panel-title .hint {
  font-weight: 400;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
}

.io-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.io-grid .field {
  min-width: 0;
}

.options-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 12px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-top: 16px;
}

.options-bar .field {
  flex-direction: row;
  align-items: center;
  gap: 6px;
}

.options-bar .field-label {
  flex: none;
}

.options-bar .select {
  width: auto;
  min-width: 110px;
  background: var(--bg-card);
}

.options-bar .input[type="number"] {
  width: 84px;
  background: var(--bg-card);
}

.options-bar .input[type="text"] {
  width: 130px;
  background: var(--bg-card);
}

.actions-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  margin-bottom: 16px;
}

/* 操作按钮行与下方卡片的间距（标准工具与自定义渲染工具通用） */
.actions-bar + .panel {
  margin-top: 16px;
}

.actions-bar .btn-primary {
  min-width: 96px;
}

/* 实时生效徽标：提示该工具无需点击按钮 */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--success-soft);
  border: 1px solid var(--success);
  color: var(--success);
  font-size: var(--fs-xs);
  white-space: nowrap;
  user-select: none;
}

.live-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

/* 文字链样式按钮（如图片压缩中「切换到 WebP」） */
.link-btn {
  padding: 0;
  border: none;
  background: none;
  color: var(--color-primary);
  font-size: inherit;
  font-family: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.link-btn:hover {
  color: var(--primary-hover, var(--color-primary));
  opacity: 0.85;
}

/* 参数当前无效时置灰（如 PNG 输出下的质量滑块） */
input[type='range'].inactive {
  opacity: 0.45;
}

.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 16px;
  padding: 10px 14px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.stats-bar b {
  color: var(--text-primary);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.stats-bar .stat-up b { color: var(--success); }
.stats-bar .stat-down b { color: var(--error); }

.message-bar {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  display: none;
}

.message-bar.show {
  display: block;
}

.message-bar.error {
  background: var(--error-soft);
  color: var(--error);
  border: 1px solid var(--error);
}

.message-bar.success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid var(--success);
}

.message-bar.info {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
}

/* 工具页说明 / FAQ / 相关工具 */
.tool-docs {
  margin-top: 32px;
  display: grid;
  gap: 16px;
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.doc-card h2 {
  font-size: var(--fs-lg);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-card h2 svg {
  width: 17px;
  height: 17px;
  color: var(--color-primary);
}

.doc-card ul, .doc-card ol {
  margin: 0;
  padding-left: 20px;
  color: var(--text-secondary);
}

.doc-card li {
  margin-bottom: 6px;
  line-height: 1.7;
}

.doc-card li:last-child {
  margin-bottom: 0;
}

.faq-item + .faq-item {
  margin-top: 12px;
}

.faq-q {
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  gap: 8px;
}

.faq-q::before {
  content: "Q";
  color: var(--color-primary);
  font-weight: 700;
  flex: none;
}

.faq-a {
  color: var(--text-secondary);
  padding-left: 18px;
  line-height: 1.7;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  color: var(--text-primary);
}

.related-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.related-list svg {
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
}

/* ---------- 竖排预览 ---------- */
.vertical-preview {
  writing-mode: vertical-rl;
  text-orientation: upright;
  line-height: 1.9;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-inset);
  overflow: auto;
  max-height: 480px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ---------- 二维码预览 ---------- */
.qr-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 220px;
}

.qr-preview canvas {
  image-rendering: pixelated;
  max-width: 100%;
}

/* ---------- 图片工具 ---------- */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 28px 16px;
  text-align: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--bg-inset);
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.dropzone svg {
  width: 30px;
  height: 30px;
  margin-bottom: 8px;
}

.image-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.image-box {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  background: var(--bg-card);
  text-align: center;
}

.image-box img {
  max-height: 240px;
  border-radius: var(--radius-sm);
  background: repeating-conic-gradient(var(--bg-subtle) 0% 25%, transparent 0% 50%) 0 0 / 16px 16px;
}

/* 图片空状态占位（未选择 / 未处理时替代破损 img 图标） */
.img-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 180px;
  padding: 24px 12px;
  color: var(--text-tertiary);
  font-size: var(--fs-sm);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-inset);
}

.img-empty svg {
  width: 30px;
  height: 30px;
  opacity: 0.55;
}

.image-box .meta {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.6;
}

/* ---------- 差异对比 ---------- */
.diff-legend {
  display: flex;
  gap: 14px;
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.diff-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.diff-chip {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.diff-add { background: rgba(22, 163, 74, 0.18); }
.diff-del { background: rgba(220, 38, 38, 0.16); }
.diff-mod { background: rgba(37, 99, 235, 0.16); }

.diff-output {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  overflow: auto;
  max-height: 520px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.diff-row {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
}

.diff-row:last-child {
  border-bottom: none;
}

.diff-sign {
  flex: none;
  width: 26px;
  text-align: center;
  user-select: none;
  color: var(--text-tertiary);
  background: var(--bg-inset);
  border-right: 1px solid var(--border);
}

.diff-text {
  padding: 1px 10px;
  white-space: pre-wrap;
  word-break: break-all;
  flex: 1;
  min-width: 0;
}

.diff-row.add .diff-sign { color: var(--success); }
.diff-row.add .diff-text { background: var(--success-soft); }
.diff-row.del .diff-sign { color: var(--error); }
.diff-row.del .diff-text { background: var(--error-soft); }
.diff-row.mod .diff-sign { color: var(--color-primary); }
.diff-row.mod .diff-text { background: var(--color-primary-soft); }
.diff-row.keep .diff-text { color: var(--text-secondary); }

.diff-text ins, .diff-text del {
  text-decoration: none;
  border-radius: 3px;
  padding: 0 1px;
}

.diff-text ins { background: rgba(22, 163, 74, 0.3); }
.diff-text del { background: rgba(220, 38, 38, 0.28); }

/* ---------- 时间戳工具 ---------- */
.ts-grid {
  display: grid;
  gap: 14px;
}

.ts-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-end;
}

.ts-row .field {
  min-width: 160px;
}

.ts-output {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-all;
}

.ts-now {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: baseline;
}

.ts-now .ts-value {
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

/* ---------- 随机字符串 ---------- */
.random-output {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  line-height: 2;
  word-break: break-all;
  white-space: pre-wrap;
  min-height: 60px;
}

.random-strength {
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  margin-top: 10px;
  overflow: hidden;
}

.random-strength i {
  display: block;
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--success);
  transition: width var(--transition);
}

/* ---------- 最近使用 chips ---------- */
.recent-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.recent-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: var(--fs-sm);
  color: var(--text-primary);
}

.recent-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.recent-list svg {
  width: 13px;
  height: 13px;
  color: var(--text-tertiary);
}

/* ---------- 提示条 / 加载 ---------- */
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-primary-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading::after {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-strong);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ---------- 代码高亮（JSON 结果） ---------- */
.json-view {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  overflow: auto;
  max-height: 480px;
  line-height: 1.7;
  white-space: pre;
  tab-size: 2;
}

.json-key { color: var(--color-primary); }
.json-string { color: var(--success); }
.json-number { color: var(--warning); }
.json-boolean { color: var(--error); }
.json-null { color: var(--text-tertiary); }


/* ===== responsive.css ===== */
/* ============================================================
   responsive.css — 响应式适配（平板 / 手机）
   断点：1024px（收侧边栏） / 768px（单列 + 抽屉导航） / 480px（紧凑）
   ============================================================ */

@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }

  .main-content {
    max-width: 100%;
  }

  .site-body {
    padding: 20px 16px 40px;
  }

  .menu-toggle {
    display: inline-flex;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 54px;
  }

  .header-inner {
    padding: 0 14px;
    gap: 10px;
  }

  .main-nav {
    display: none;
  }

  .header-search {
    max-width: none;
  }

  .hero {
    padding: 24px 0 4px;
  }

  .hero h1 {
    font-size: var(--fs-2xl);
  }

  .hero-sub {
    font-size: var(--fs-md);
  }

  .hero-search .input {
    height: 42px;
    font-size: var(--fs-md);
  }

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

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

  .image-compare {
    grid-template-columns: 1fr;
  }

  .section {
    margin-top: 32px;
  }

  .site-body {
    padding: 16px 12px 32px;
  }

  /* 抽屉式侧边栏 */
  .drawer-mask {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: 300;
    display: none;
  }

  .drawer-mask.open {
    display: block;
  }

  .drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 264px;
    max-width: 82vw;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    z-index: 301;
    transform: translateX(-100%);
    transition: transform var(--transition);
    overflow-y: auto;
    padding: 16px 12px;
    display: block;
  }

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

  .drawer .sidebar-link {
    padding: 9px 10px;
  }

}

@media (max-width: 480px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }

  /* 视觉隐藏保留可读名称，避免仅图标时无障碍/智能体报「链接无文本」 */
  .logo span.logo-text {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .header-search {
    margin-left: 0;
  }

  .actions-bar .btn {
    flex: 1 1 calc(50% - 5px);
  }

  .stats-bar {
    gap: 6px 14px;
  }

  .options-bar {
    gap: 8px 12px;
  }
}