/* =============================================================================
 * 集成工具大全 · 全局样式
 * -----------------------------------------------------------------------------
 * 结构：1. 设计变量  2. 基础重置  3. 布局骨架  4. 首页  5. 工具页
 *       6. 表单与按钮  7. 结果区与提示  8. 动效与响应式  9. 可访问性
 * ========================================================================== */

/* ------------------------------- 1. 设计变量 ------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --bg: #f4f5fa;
  --surface: #ffffff;
  --surface-2: #f7f8fc;
  --surface-3: #eceef6;
  --border: #e4e7ef;
  --border-strong: #ccd2e2;

  --text: #14161f;
  --text-2: #4a4f60;
  --text-3: #7a8093;

  --primary: #5b5bd6;
  --primary-2: #7c4dff;
  --primary-ink: #ffffff;
  --primary-soft: rgba(91, 91, 214, 0.1);

  --ok: #0f8a5f;
  --ok-soft: rgba(15, 138, 95, 0.1);
  --err: #d92d20;
  --err-soft: rgba(217, 45, 32, 0.09);
  --warn: #b45309;
  --warn-soft: rgba(180, 83, 9, 0.1);

  --shadow-1: 0 1px 2px rgba(20, 22, 31, 0.04), 0 1px 3px rgba(20, 22, 31, 0.05);
  --shadow-2: 0 14px 32px -18px rgba(20, 22, 31, 0.32);
  --shadow-3: 0 22px 48px -24px rgba(20, 22, 31, 0.4);

  --radius-lg: 18px;
  --radius: 12px;
  --radius-sm: 8px;

  --header-h: 62px;
  --content-w: 1120px;
}

[data-theme="dark"] {
  --bg: #0d0f14;
  --surface: #151822;
  --surface-2: #1b1f2a;
  --surface-3: #232836;
  --border: #262b38;
  --border-strong: #384052;

  --text: #e8eaf2;
  --text-2: #b3b9c9;
  --text-3: #8b92a5;

  --primary: #8b8bf5;
  --primary-2: #a78bfa;
  --primary-ink: #0d0f14;
  --primary-soft: rgba(139, 139, 245, 0.14);

  --ok: #4ade80;
  --ok-soft: rgba(74, 222, 128, 0.12);
  --err: #f87171;
  --err-soft: rgba(248, 113, 113, 0.12);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.12);

  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-2: 0 16px 40px -22px rgba(0, 0, 0, 0.85);
  --shadow-3: 0 24px 56px -26px rgba(0, 0, 0, 0.9);
}

/* ------------------------------- 2. 基础重置 ------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 420px at 12% -8%, rgba(91, 91, 214, 0.14), transparent 62%),
    radial-gradient(760px 380px at 92% 0%, rgba(14, 165, 233, 0.12), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(900px 420px at 12% -8%, rgba(91, 91, 214, 0.22), transparent 62%),
    radial-gradient(760px 380px at 92% 0%, rgba(14, 165, 233, 0.14), transparent 60%);
}

h1, h2, h3, h4, p, ul, ol, figure {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

button {
  font-family: inherit;
}

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

/* 让 hidden 属性始终生效（避免被 .kv-list / .img-grid 等的 display 覆盖） */
[hidden] {
  display: none !important;
}

::selection {
  background: rgba(91, 91, 214, 0.24);
}

/* 滚动条（WebKit） */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 99px;
  border: 3px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-track {
  background: transparent;
}

/* ------------------------------- 3. 布局骨架 ------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg); /* 旧浏览器回退 */
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
}

@supports not (backdrop-filter: blur(2px)) {
  .site-header {
    background: var(--bg);
  }
}

.header-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.2px;
  border-radius: var(--radius-sm);
}

.brand-logo {
  width: 34px;
  height: 34px;
  display: block;
  flex: 0 0 auto;
  border-radius: 10px;
  box-shadow: 0 6px 16px -8px rgba(91, 91, 214, 0.9);
}

.brand-name {
  font-size: 16px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ok);
  background: var(--ok-soft);
  border: 1px solid color-mix(in srgb, var(--ok) 22%, transparent);
  white-space: nowrap;
}

.privacy-pill svg {
  width: 14px;
  height: 14px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.18s;
}

.icon-btn:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  background: var(--primary-soft);
}

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

/* 主题图标切换：浅色显示月亮，深色显示太阳 */
.icon-btn .icon-sun {
  display: none;
}
[data-theme="dark"] .icon-btn .icon-sun {
  display: block;
}
[data-theme="dark"] .icon-btn .icon-moon {
  display: none;
}

.app {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 30px 20px 72px;
  outline: none;
}

/* 首页路由切换后会把焦点移到主区域（读屏友好），这里不显示焦点框 */
.app:focus,
.app:focus-visible {
  outline: none;
}

.site-footer {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 26px 20px 42px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 12.5px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.footer-logo {
  width: 28px;
  height: 28px;
  display: block;
  flex: 0 0 auto;
  border-radius: 8px;
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.footer-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.2px;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-3);
}

/* 版权行里的作者链接（XFM → GitHub 仓库） */
.footer-copy .footer-link {
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 1px dashed color-mix(in srgb, var(--text-3) 55%, transparent);
  transition: color 0.18s, border-bottom-color 0.18s;
}

.footer-copy .footer-link:hover {
  color: var(--primary);
  border-bottom-color: color-mix(in srgb, var(--primary) 55%, transparent);
}

.footer-meta {
  text-align: right;
}

.footer-main {
  color: var(--text-2);
  margin-bottom: 3px;
}

.footer-sub {
  color: var(--text-3);
}

@media (max-width: 719px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .footer-meta {
    text-align: left;
  }
}

.noscript {
  position: fixed;
  inset: auto 0 0 0;
  padding: 14px 20px;
  text-align: center;
  background: var(--err);
  color: #fff;
  font-size: 14px;
  z-index: 99;
}

/* ------------------------------- 4. 首页 ------------------------------- */
.hero {
  padding: 26px 0 30px;
  max-width: 760px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(29px, 5.2vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  background: linear-gradient(120deg, var(--text) 30%, var(--primary) 72%, var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 15px;
  max-width: 640px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.badge {
  font-size: 12px;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 11px;
  box-shadow: var(--shadow-1);
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 22px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-1);
  padding: 0 12px;
  transition: border-color 0.18s, box-shadow 0.18s;
}

.search-box:focus-within {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.search-box > svg {
  width: 18px;
  height: 18px;
  color: var(--text-3);
  flex: none;
}

.search-input {
  flex: 1;
  min-width: 0;
  height: 48px;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  padding: 0 10px;
}

.search-input::placeholder {
  color: var(--text-3);
}

/* 去掉 search 类型的原生清除按钮，保持外观统一 */
.search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.search-kbd {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  background: var(--surface-2);
}

.chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
}

.chips::-webkit-scrollbar {
  display: none;
}

.chip {
  flex: none;
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.16s ease;
  white-space: nowrap;
}

.chip:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
}

.chip[aria-pressed="true"] {
  color: var(--primary-ink);
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
  box-shadow: 0 8px 18px -12px rgba(91, 91, 214, 0.95);
}

.results-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.results-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}

.results-hint {
  font-size: 12.5px;
  color: var(--text-3);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 14px;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  color: var(--text);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  overflow: hidden;
}

.tool-card::after {
  content: "";
  position: absolute;
  inset: -40% 55% 60% -20%;
  background: radial-gradient(circle, rgba(91, 91, 214, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 38%, var(--border));
  box-shadow: var(--shadow-2);
}

.tool-card:hover::after {
  opacity: 1;
}

.tool-card:active {
  transform: translateY(-1px);
}

.tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.tool-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 16%, transparent);
}

.tool-icon svg {
  width: 20px;
  height: 20px;
}

.tool-icon.lg {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  flex: none;
}

.tool-icon.lg svg {
  width: 26px;
  height: 26px;
}

.tool-cat {
  font-size: 11.5px;
  color: var(--text-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 9px;
}

.tool-name {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.tool-desc {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
}

.tool-arrow {
  position: absolute;
  right: 16px;
  bottom: 14px;
  color: var(--text-3);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s;
}

.tool-arrow svg {
  width: 16px;
  height: 16px;
}

.tool-card:hover .tool-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--primary);
}

.empty {
  text-align: center;
  color: var(--text-3);
  padding: 46px 16px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  font-size: 14px;
}

.privacy-card {
  margin-top: 34px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--surface), var(--surface-2));
  box-shadow: var(--shadow-1);
}

.privacy-card .tool-icon {
  width: 38px;
  height: 38px;
}

.privacy-card h2 {
  font-size: 14.5px;
  margin-bottom: 4px;
}

.privacy-card p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.7;
}

.privacy-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ------------------------------- 5. 工具页 ------------------------------- */
.tool-page {
  max-width: 900px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--text-3);
  padding: 6px 10px 6px 6px;
  border-radius: 8px;
  margin-bottom: 10px;
  transition: color 0.16s, background 0.16s;
}

.back-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

.tool-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.tool-title {
  font-size: clamp(21px, 4vw, 26px);
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.tool-sub {
  margin-top: 4px;
  color: var(--text-3);
  font-size: 13.5px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  padding: 20px;
}

.local-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--text-3);
}

.local-note svg {
  width: 15px;
  height: 15px;
  color: var(--ok);
  flex: none;
}

.related {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: 12.5px;
  color: var(--text-3);
  letter-spacing: 0.3px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.related-link {
  font-size: 13px;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  transition: all 0.16s;
}

.related-link:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  background: var(--primary-soft);
}

/* ------------------------------- 6. 表单与按钮 ------------------------------- */
.field + .field,
.field + .btn-row,
.btn-row + .field,
.btn-row + .btn-row,
.split + .field,
.field + .split {
  margin-top: 16px;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 7px;
  min-height: 22px;
}

.label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
}

.label-meta {
  font-size: 12px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.label-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.link-btn {
  border: 0;
  background: none;
  color: var(--primary);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 6px;
  transition: background 0.16s;
}

.link-btn:hover {
  background: var(--primary-soft);
}

.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: var(--radius);
  padding: 11px 13px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.16s, box-shadow 0.16s, background 0.16s;
}

.textarea {
  display: block;
  min-height: 120px;
  resize: vertical;
  line-height: 1.65;
  tab-size: 2;
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  background: var(--surface);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--text-3);
  opacity: 0.85;
}

.textarea[readonly] {
  background: var(--surface-2);
  color: var(--text-2);
  cursor: text;
}

.select {
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
  cursor: pointer;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 550;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.12s, box-shadow 0.16s, background 0.16s, border-color 0.16s, color 0.16s;
  user-select: none;
}

.btn:hover {
  border-color: color-mix(in srgb, var(--primary) 38%, var(--border));
  color: var(--primary);
  background: var(--primary-soft);
}

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

.btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
  color: var(--text-3);
  background: var(--surface);
  border-color: var(--border);
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 18px -12px rgba(91, 91, 214, 0.95);
}

.btn.primary:hover {
  color: #fff;
  filter: brightness(1.05);
}

.btn.primary:disabled {
  color: #fff;
  filter: grayscale(0.4);
}

.btn.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-3);
}

.btn.ghost:hover {
  background: var(--surface-3);
  color: var(--text-2);
  border-color: transparent;
}

.btn.sm {
  height: 32px;
  padding: 0 12px;
  font-size: 12.5px;
}

.btn svg {
  width: 15px;
  height: 15px;
}

/* 分段切换（Tab） */
.tabs {
  display: inline-flex;
  padding: 3px;
  background: var(--surface-3);
  border-radius: 11px;
  gap: 2px;
  margin-bottom: 16px;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  border: 0;
  background: transparent;
  color: var(--text-3);
  font-size: 13px;
  font-weight: 550;
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.16s, color 0.16s, box-shadow 0.16s;
}

.tab:hover {
  color: var(--text-2);
}

.tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-1);
}

/* 两栏 / 多栏布局 */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.split-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.form-item {
  flex: 1 1 150px;
  min-width: 0;
}

.form-item .label {
  display: block;
  margin-bottom: 6px;
}

.check-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
}

.check input[type="checkbox"],
.check input[type="radio"] {
  width: 15px;
  height: 15px;
  accent-color: var(--primary);
  margin: 0;
  cursor: pointer;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

input[type="range"] {
  flex: 1;
  height: 4px;
  accent-color: var(--primary);
  cursor: pointer;
}

input[type="color"] {
  width: 46px;
  height: 38px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  cursor: pointer;
}

/* 带 .input 类的取色器铺满一行，作为可视色条 */
input[type="color"].input {
  width: 100%;
  height: 42px;
  padding: 4px;
  cursor: pointer;
}

/* 拖放上传区 */
.dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 26px 18px;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text-3);
  text-align: center;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s, color 0.18s;
}

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

.dropzone svg {
  width: 26px;
  height: 26px;
}

.dropzone strong {
  color: var(--text-2);
  font-weight: 600;
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.file-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
  margin-top: 10px;
  margin-bottom: 6px;
  font-size: 12.5px;
  color: var(--text-3);
  word-break: break-all;
}

.file-meta .name {
  color: var(--text-2);
  font-weight: 600;
}

/* 统计卡片 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.stat {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
}

.stat-value {
  display: block;
  font-size: 19px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.stat-label {
  display: block;
  font-size: 11.5px;
  color: var(--text-3);
  margin-top: 2px;
}

/* 键值结果行 */
.kv-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.kv {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 9px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.kv-key {
  font-size: 12px;
  color: var(--text-3);
  white-space: nowrap;
}

.kv-val {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text);
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.kv-val::-webkit-scrollbar {
  display: none;
}

.kv .link-btn {
  font-size: 12px;
}

/* 高亮标记 */
mark {
  background: rgba(250, 204, 21, 0.42);
  color: inherit;
  border-radius: 3px;
  padding: 0 1px;
}

[data-theme="dark"] mark {
  background: rgba(250, 204, 21, 0.28);
  color: #fde68a;
}

.preview-box {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 13px;
  max-height: 340px;
  overflow: auto;
}

/* 图片预览 */
.img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 6px;
}

.img-grid.img-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.img-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
}

.img-card-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--text-3);
  padding: 8px 11px;
  border-bottom: 1px solid var(--border);
}

.img-card-body {
  display: grid;
  place-items: center;
  min-height: 130px;
  padding: 10px;
  background-image:
    linear-gradient(45deg, var(--surface-3) 25%, transparent 25%),
    linear-gradient(-45deg, var(--surface-3) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--surface-3) 75%),
    linear-gradient(-45deg, transparent 75%, var(--surface-3) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.img-card-body img {
  max-height: 220px;
  width: auto;
  border-radius: 4px;
}

/* 二维码画布 */
.qr-stage {
  display: grid;
  place-items: center;
  padding: 20px;
  margin-top: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  min-height: 220px;
}

.qr-stage canvas {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  image-rendering: pixelated;
  box-shadow: 0 6px 20px -12px rgba(0, 0, 0, 0.45);
}

/* 颜色预览 */
.color-preview {
  height: 96px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 14px;
  transition: background-color 0.2s;
}

/* 密码列表 */
.pw-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.pw-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 13px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 13.5px;
  word-break: break-all;
}

.pw-item span {
  flex: 1;
  min-width: 0;
}

.pw-item .link-btn {
  flex: none;
}

/* 强度条 */
.meter {
  height: 6px;
  border-radius: 99px;
  background: var(--surface-3);
  overflow: hidden;
  margin-top: 12px;
}

.meter-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--ok);
  transition: width 0.25s ease, background-color 0.25s ease;
}

.meter-text {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 6px;
}

/* 匹配结果表 */
.match-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  max-height: 280px;
  overflow: auto;
}

.match-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.match-item .idx {
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.match-item .val {
  word-break: break-all;
  color: var(--text);
}

.match-item .group {
  display: block;
  color: var(--text-3);
  font-size: 11.5px;
  margin-top: 2px;
}

/* ------------------------------- 7. 结果区与提示 ------------------------------- */
.status {
  margin-top: 14px;
  padding: 10px 13px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.6;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-2);
  word-break: break-word;
}

.status.ok {
  color: var(--ok);
  background: var(--ok-soft);
  border-color: color-mix(in srgb, var(--ok) 26%, transparent);
}

.status.err {
  color: var(--err);
  background: var(--err-soft);
  border-color: color-mix(in srgb, var(--err) 26%, transparent);
}

.status.info {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 24%, transparent);
}

.hint {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.7;
  margin-top: 10px;
}

.hint code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 4px;
}

.sub-title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  margin: 20px 0 10px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

/* Toast */
.toast-root {
  position: fixed;
  left: 50%;
  bottom: max(24px, env(safe-area-inset-bottom, 0px) + 16px);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 100;
  pointer-events: none;
  width: max-content;
  max-width: min(92vw, 460px);
}

/* 回到顶部：右下角悬浮，滚动超过一屏后淡入（visibility 保证隐藏时不可聚焦） */
.back-to-top {
  position: fixed;
  right: max(22px, env(safe-area-inset-right, 0px) + 18px);
  bottom: max(26px, env(safe-area-inset-bottom, 0px) + 20px);
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-2);
  box-shadow: var(--shadow-2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) scale(0.92);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s,
    color 0.18s, border-color 0.18s, background 0.18s;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-to-top:hover {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
}

.back-to-top:active {
  transform: scale(0.92);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 719px) {
  .back-to-top {
    right: max(14px, env(safe-area-inset-right, 0px) + 12px);
    bottom: max(18px, env(safe-area-inset-bottom, 0px) + 14px);
    width: 40px;
    height: 40px;
  }

  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}

.toast {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: 999px;
  background: #16181f;
  color: #f3f4f8;
  font-size: 13px;
  line-height: 1.4;
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, 0.7);
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  transition: opacity 0.2s ease, transform 0.2s ease;
  text-align: left;
}

[data-theme="dark"] .toast {
  background: #eef0f7;
  color: #14161f;
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.toast-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
  background: #a5b4fc;
}

.toast-success .toast-dot {
  background: #34d399;
}

.toast-error .toast-dot {
  background: #f87171;
}

.toast-warn .toast-dot {
  background: #fbbf24;
}

/* ------------------------------- 7.5 扩展工具组件 ------------------------------- */

/* 大号结果展示 */
.big-result {
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  word-break: break-word;
}

.big-result strong {
  color: var(--primary);
  font-weight: 700;
}

.big-result + .kv-list,
.big-result + .table-wrap {
  margin-top: 14px;
}

/* 数据表格 */
.table-wrap {
  margin-top: 12px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th,
.data-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table td:last-child {
  white-space: normal;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface-2);
  color: var(--text-2);
  font-weight: 600;
}

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

.data-table tbody tr:hover td {
  background: var(--surface-2);
}

/* 代码块 */
.code-block {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  white-space: pre;
  overflow: auto;
  max-height: 360px;
}

/* 文本对比 */
.diff-view {
  margin-top: 14px;
  max-height: 460px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.diff-line {
  display: flex;
  min-width: max-content;
  align-items: stretch;
}

.diff-no {
  flex: none;
  width: 42px;
  padding: 3px 6px;
  text-align: right;
  color: var(--text-3);
  background: var(--surface-2);
  border-right: 1px solid var(--border);
  user-select: none;
  font-variant-numeric: tabular-nums;
}

.diff-sign {
  flex: none;
  width: 18px;
  padding: 3px 0;
  text-align: center;
  color: var(--text-3);
}

.diff-text {
  flex: 1;
  padding: 3px 10px;
  white-space: pre-wrap;
  word-break: break-all;
}

.diff-add {
  background: rgba(16, 185, 129, 0.12);
}

.diff-add .diff-sign {
  color: var(--ok);
}

.diff-del {
  background: rgba(239, 68, 68, 0.12);
}

.diff-del .diff-sign {
  color: var(--err);
}

/* 月历 */
.cal {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.cal-head {
  padding: 12px 16px;
  text-align: center;
  font-weight: 600;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}

.cal-wday {
  padding: 8px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
}

.cal-day {
  padding: 12px 0;
  text-align: center;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
}

.cal-day.out {
  color: var(--text-3);
  opacity: 0.45;
}

.cal-day.today {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  border-radius: 8px;
}

/* 倒计时 */
.cd-stage {
  margin-top: 16px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  text-align: center;
}

.cd-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.cd-cell {
  padding: 12px 4px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.cd-num {
  display: block;
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
  line-height: 1.2;
}

.cd-label {
  font-size: 11.5px;
  color: var(--text-3);
}

.cd-note {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--text-2);
}

/* 色卡 */
.swatch {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.swatch-lg {
  height: 56px;
  margin-top: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.color-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.palette-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 2px;
  min-height: 110px;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  text-align: left;
  transition: transform 0.15s ease;
}

.palette-item:hover {
  transform: translateY(-2px);
}

.palette-hex {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.palette-rgb {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.75;
}

/* 抽奖结果 */
.winner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.winner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.winner-rank {
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
}

.winner-name {
  font-weight: 600;
  word-break: break-all;
}

/* 骰子与硬币 */
.dice-stage {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dice-face {
  font-size: 46px;
  line-height: 1;
  color: var(--primary);
}

.dice-num {
  display: inline-grid;
  place-items: center;
  min-width: 46px;
  height: 46px;
  padding: 0 8px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-weight: 700;
}

.coin-seq {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.coin {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
}

.coin.head {
  background: var(--primary-soft);
  color: var(--primary);
}

.coin.tail {
  background: var(--surface-3);
  color: var(--text-2);
}

/* 分组 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.team-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.team-head {
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 13px;
}

.team-card ul {
  list-style: none;
  margin: 0;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
}

.team-card li::before {
  content: '·';
  margin-right: 8px;
  color: var(--text-3);
}

/* 姓名 */
.name-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.name-chip {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 13.5px;
}

/* 命令速查 */
.cheat-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
  max-height: 520px;
  overflow: auto;
}

.cheat-item {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.cheat-cmd {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  color: var(--primary);
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  word-break: break-all;
}

.cheat-cmd:hover {
  text-decoration: underline;
}

.cheat-desc {
  margin: 4px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-2);
}

/* CSS 生成器预览 */
.gradient-preview {
  height: 140px;
  margin-top: 14px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.shadow-stage,
.radius-stage {
  display: grid;
  place-items: center;
  padding: 40px 20px;
  margin-top: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.shadow-box {
  display: grid;
  place-items: center;
  width: 180px;
  height: 110px;
  border-radius: 14px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 13px;
}

.radius-box {
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

/* 对比度 */
.contrast-preview {
  margin-top: 14px;
  margin-bottom: 14px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.cp-big {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
}

.cp-small {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

/* 图片预览画布 */
.preview-canvas {
  max-width: 100%;
  max-height: 240px;
  width: auto;
  border-radius: 4px;
}

.form-item input[type="range"] {
  width: 100%;
  flex: none;
}

/* ------------------------------- 8. 动效与响应式 ------------------------------- */
@media (min-width: 720px) {
  .toolbar {
    flex-direction: row;
    align-items: center;
    gap: 16px;
  }

  .search-box {
    flex: 0 0 340px;
  }

  .search-kbd {
    display: inline-block;
  }

  .chips {
    flex: 1;
    justify-content: flex-end;
  }
}

@media (max-width: 719px) {
  .app {
    padding: 22px 16px 60px;
  }

  .big-result {
    font-size: 17px;
  }

  .cd-grid {
    gap: 6px;
  }

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

  .cal-day {
    padding: 9px 0;
    font-size: 12px;
  }

  .data-table th,
  .data-table td {
    padding: 7px 9px;
    white-space: normal;
    word-break: break-word;
  }

  .data-table th {
    white-space: nowrap;
  }

  .palette-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .shadow-stage,
  .radius-stage {
    padding: 26px 14px;
  }

  .site-footer {
    padding: 22px 16px 40px;
  }

  .hero {
    padding: 14px 0 22px;
  }

  .hero-desc {
    font-size: 14px;
  }

  .privacy-pill-text {
    display: none;
  }

  .privacy-pill {
    padding: 0 9px;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 11px;
  }

  .tool-card {
    padding: 14px;
  }

  .tool-name {
    font-size: 15px;
  }

  .tool-desc {
    font-size: 12.5px;
  }

  .panel {
    padding: 16px;
    border-radius: 16px;
  }

  .btn-row {
    gap: 6px;
  }

  .split,
  .split-3,
  .img-grid {
    grid-template-columns: 1fr;
  }

  .img-grid.img-grid-3 {
    grid-template-columns: 1fr 1fr;
  }

  /* 需要整行展示的表单项（例如图片压缩的多组选项） */
  .form-row.stack > .form-item {
    flex: 1 1 100%;
  }

  .kv {
    grid-template-columns: 1fr auto;
    align-items: start;
    gap: 4px 10px;
  }

  .kv-key {
    grid-column: 1 / -1;
  }

  .kv-val {
    white-space: normal;
    overflow: visible;
    word-break: break-all;
    line-height: 1.55;
  }

  .kv .link-btn {
    align-self: center;
  }

  /* 移动端输入控件字号不小于 16px，避免 iOS 自动缩放 */
  .input,
  .textarea,
  .select {
    font-size: 16px;
  }

  .mono {
    font-size: 13.5px;
  }

  .results-hint {
    display: none;
  }

  .tool-head {
    gap: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .tool-card:hover {
    transform: none;
  }
}

/* ------------------------------- 9. 可访问性 ------------------------------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 200;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 10px;
}

:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary) 70%, transparent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =============================================================================
 * 9. 第二批工具组件（211 款工具新增的展示块）
 * ========================================================================== */

/* TOTP 动态口令 */
.totp-stage {
  padding: 18px 16px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.totp-code {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 6px;
  text-align: center;
  color: var(--text);
}

.totp-note {
  margin: 8px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}

/* 世界时钟 */
.clock-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.clock-local {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 650;
  letter-spacing: 1px;
}

.clock-date {
  font-size: 13px;
  color: var(--text-3);
}

.clock-table td {
  font-variant-numeric: tabular-nums;
}

/* 词频分布条 */
.bar-cell {
  display: block;
  width: 100%;
  min-width: 70px;
  height: 8px;
  border-radius: 99px;
  background: var(--surface-3);
  overflow: hidden;
}

.bar-cell > span {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary) 55%, #a855f7));
}

/* 随机 emoji */
.emoji-out {
  margin-top: 14px;
  font-size: 24px;
  line-height: 1.9;
  letter-spacing: 2px;
  word-break: break-word;
}

/* 彩票号码球 */
.ball {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-right: 4px;
  border-radius: 50%;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.ball-red {
  background: #e5484d;
}

.ball-blue {
  background: #3b82f6;
}

/* 扑克牌 */
.card-hands {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.card-hand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.card-hand-title {
  flex: none;
  width: 54px;
  font-size: 12px;
  color: var(--text-3);
}

.card-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.pcard {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 44px;
  padding: 0 5px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: #1a1a1a;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.pcard.red {
  color: #d32f2f;
}

/* 图片对比 */
.cmp-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cmp-zone {
  min-height: 96px;
  padding: 14px 12px;
}

.compare-stage {
  position: relative;
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  line-height: 0;
  background: var(--surface-2);
}

.cmp-img {
  display: block;
  width: 100%;
  height: auto;
}

.cmp-top {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.cmp-range {
  position: absolute;
  left: 8%;
  bottom: 12px;
  width: 84%;
}

.cmp-tag {
  position: absolute;
  top: 10px;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 11px;
}

.cmp-tag-a { left: 10px; }
.cmp-tag-b { right: 10px; }

/* ICO 预览 */
.ico-body {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  padding: 16px 12px;
}

.ico-preview {
  width: auto;
  max-width: none;
  height: auto;
  border-radius: 4px;
  background: #fff;
  image-rendering: pixelated;
}

/* 颜色梯度 */
.shade-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.shade-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.shade-swatch {
  display: block;
  height: 52px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.shade-item.is-base .shade-swatch {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.shade-hex {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
}

/* Grid 预览 */
.grid-preview {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.gp-cell {
  display: grid;
  place-items: center;
  min-height: 56px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* 贝塞尔曲线预览 */
.bezier-stage {
  position: relative;
  height: 72px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow: hidden;
}

.bezier-ball {
  position: absolute;
  top: 50%;
  left: 14px;
  width: 22px;
  height: 22px;
  margin-top: -11px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary) 40%, transparent);
}

.bezier-stage:hover .bezier-ball {
  transform: translateX(240px);
}

/* 滤镜预览 */
.filter-stage {
  height: 170px;
  margin-bottom: 12px;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 22% 28%, rgba(255, 255, 255, 0.55), transparent 45%),
    linear-gradient(135deg, #5b5bd6, #a855f7 48%, #06b6d4);
}

/* Markdown 预览 */
.md-preview {
  padding: 2px;
  line-height: 1.78;
  word-break: break-word;
}

.md-preview h1,
.md-preview h2,
.md-preview h3,
.md-preview h4 {
  margin: 16px 0 8px;
  line-height: 1.35;
}

.md-preview h1 { font-size: 24px; }
.md-preview h2 { font-size: 20px; }
.md-preview h3 { font-size: 17px; }
.md-preview h4 { font-size: 15px; }

.md-preview p {
  margin: 8px 0;
}

.md-preview ul,
.md-preview ol {
  margin: 8px 0;
  padding-left: 22px;
}

.md-preview li {
  margin: 3px 0;
}

.md-preview blockquote {
  margin: 10px 0;
  padding-left: 12px;
  border-left: 3px solid var(--border);
  color: var(--text-2);
}

.md-preview pre {
  margin: 10px 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--surface-2);
  overflow: auto;
}

.md-preview code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-3);
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.md-preview pre code {
  padding: 0;
  background: none;
}

.md-preview hr {
  margin: 16px 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.md-preview a {
  color: var(--primary);
}

/* 大色板 */
.palette-grid-lg {
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  margin-top: 4px;
}

.palette-grid-lg .palette-item {
  justify-content: flex-start;
  min-height: 0;
  padding: 8px;
  gap: 6px;
}

.palette-grid-lg .swatch {
  width: 100%;
  height: 58px;
}

@media (max-width: 719px) {
  .cmp-inputs {
    grid-template-columns: 1fr;
  }

  .totp-code {
    font-size: 32px;
    letter-spacing: 4px;
  }

  .clock-local {
    font-size: 26px;
  }

  .card-hand-title {
    width: auto;
  }

  .bezier-stage:hover .bezier-ball {
    transform: translateX(180px);
  }
}

/* 滑杆行在窄屏可换行，避免数字输入被挤出卡片 */
.range-row {
  flex-wrap: wrap;
}

.range-row input[type="range"] {
  flex: 1 1 120px;
  min-width: 0;
}

.range-row .input {
  flex: 0 0 auto;
}

/* Markdown 预览需要恢复被全局重置的列表符号 */
.md-preview ul {
  list-style: disc;
}

.md-preview ol {
  list-style: decimal;
}

.md-preview ul ul {
  list-style: circle;
}

/* 颜色梯度固定列数，避免最后一行只剩一两个色块 */
.shade-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

@media (max-width: 719px) {
  .shade-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 世界时钟：窄屏隐藏日期与时区列，保证时间和时差可读 */
@media (max-width: 719px) {
  .clock-table th:nth-child(3),
  .clock-table td:nth-child(3),
  .clock-table th:nth-child(4),
  .clock-table td:nth-child(4) {
    display: none;
  }

  .clock-table th,
  .clock-table td {
    white-space: nowrap;
  }

  .clock-table {
    font-size: 12px;
  }
}

/* Markdown 预览结果加一层卡片边界，避免与按钮区粘连 */
.md-preview {
  margin-top: 4px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

/* 图片对比滑块在图片上更易看见 */
.cmp-range {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.35);
}

.cmp-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: #fff;
  cursor: ew-resize;
}

.cmp-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: #fff;
  cursor: ew-resize;
}

/* =============================================================================
 * 10. 第三批工具组件
 * ========================================================================== */

/* 年历 */
.calendar-year {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.calendar-month {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow: hidden;
}

.calendar-title {
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 8px 6px 4px;
}

.calendar-table {
  width: 100%;
  font-size: 12px;
  border: none;
}

.calendar-table th,
.calendar-table td {
  padding: 3px 2px;
  text-align: center;
  border: none;
}

.calendar-table td {
  border-radius: 4px;
}

/* 年度进度条 */
.meter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.meter-row .meter {
  flex: 1 1 auto;
  margin-top: 0;
}

.meter-label {
  flex: 0 0 3em;
  font-size: 13px;
  color: var(--text-2);
}

.meter-value {
  flex: 0 0 4.5em;
  text-align: right;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-3);
}

/* 淘汰赛对阵 */
.bracket-round {
  margin-top: 12px;
}

.bracket-round h4 {
  font-size: 13px;
  color: var(--text-2);
  margin: 0 0 6px;
}

/* 宾果与数独卡片 */
.bingo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.bingo-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  padding: 10px 12px;
}

.bingo-card h4 {
  font-size: 13px;
  margin: 0 0 8px;
  color: var(--text-2);
}

.bingo-table th,
.bingo-table td {
  text-align: center;
  padding: 6px 4px;
}

.bingo-free {
  background: var(--accent-soft);
  font-weight: 700;
  font-size: 11px;
}

.sudoku-table td {
  text-align: center;
  padding: 6px 0;
}

.sudoku-given {
  font-weight: 700;
}

.sudoku-empty {
  color: var(--text-3);
}

.bingo-card details {
  margin-top: 8px;
}

/* 电阻色环 */
.res-strip {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.res-swatch {
  width: 22px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid var(--border);
  display: inline-block;
}

/* 颜色混合 */
.mix-preview {
  display: flex;
  gap: 10px;
  margin: 12px 0;
}

.mix-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.mix-swatch span {
  width: 64px;
  height: 44px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.mix-swatch em {
  font-style: normal;
  font-size: 11px;
  color: var(--text-3);
}

/* 色盲模拟 */
.cvd-panel {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  padding: 10px 12px;
}

.cvd-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 5px 0;
}

.cvd-name {
  flex: 0 0 12em;
  font-size: 13px;
}

.cvd-swatches {
  display: flex;
  gap: 8px;
}

.cvd-swatches .shade-swatch {
  width: 40px;
  height: 26px;
}

/* clip-path 与 flex 预览 */
.clip-demo {
  width: 140px;
  height: 100px;
  margin-top: 12px;
  background: linear-gradient(135deg, var(--primary), #22d3ee);
}

.flex-demo {
  margin-top: 12px;
  padding: 14px;
  min-height: 90px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.flex-demo-item {
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--accent-soft);
  font-size: 13px;
  font-weight: 600;
}

.flex-demo-item:nth-child(2) {
  padding-top: 20px;
}

.flex-demo-item:nth-child(3) {
  padding-bottom: 24px;
}

/* 第三批图片工具舞台 */
.img-stage {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.img-stage canvas {
  max-width: 100%;
}

/* 移动端适配 */
@media (max-width: 719px) {
  .calendar-year {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mix-preview {
    flex-wrap: wrap;
  }

  .cvd-name {
    flex-basis: 8em;
  }

  .meter-value {
    flex-basis: 4em;
  }
}

/* 数独：每三格加粗分隔，形成 3×3 宫 */
.sudoku-table {
  table-layout: fixed;
}

.sudoku-table td {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  width: 11.1%;
}

.sudoku-table td:nth-child(3n) {
  border-right: 2px solid var(--text-3);
}

.sudoku-table tr:nth-child(3n) td {
  border-bottom: 2px solid var(--text-3);
}

.sudoku-table td:last-child,
.sudoku-table th:last-child {
  border-right: none;
}

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