/* ============================================================
   EITools Design System v3 — 2026-08-30 批3「去 AI 味」
   原则：黑白灰中性基底 + 单一强调色，无渐变、无光晕、无彩色图标底
   亮色：#fafafa 底 / #18181b 墨 / #2563eb 单强调（仅链接与焦点）
   暗色：#09090b 底 / #ededed 字 / #00e0ff 强调（品牌保留）
   ============================================================ */

:root {
  --bg: #fafafa;
  --bg-soft: #f4f4f5;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --ink: #18181b;
  --ink-contrast: #ffffff;
  --primary: #2563eb;
  --primary-soft: #eff6ff;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-2: 0 4px 16px rgba(0, 0, 0, 0.08);
  --radius: 10px;
  --fab-bg: rgba(255, 255, 255, 0.92);
  --fab-text: #18181b;
}

html[data-theme="dark"] {
  --bg: #09090b;
  --bg-soft: #131316;
  --card: #101012;
  --text: #ededed;
  --muted: #98989e;
  --border: #222228;
  --border-strong: #2d2d33;
  --ink: #ededed;
  --ink-contrast: #09090b;
  --primary: #00e0ff;
  --primary-soft: rgba(0, 224, 255, 0.07);
  --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.6);
  --shadow-2: 0 8px 28px rgba(0, 0, 0, 0.8);
  --fab-bg: rgba(16, 16, 18, 0.92);
  --fab-text: #ededed;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  transition: background 0.25s, color 0.25s;
}

::selection { background: var(--text); color: var(--bg); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 紧凑站点头部（无渐变无光晕） ===== */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}

.site-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--text);
  margin: 0 0 4px;
}

.tagline { font-size: 0.95rem; color: var(--muted); }

.hstat { text-align: center; }
.hstat b {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}
.hstat span { font-size: 0.75rem; color: var(--muted); }

/* 首页统计条（卡片 + 左侧品牌色竖线）；用 #tools-main 限定，避免覆盖 all-tools 的渐变统计条 */
#tools-main .stats-bar {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 20px 0 8px;
  box-shadow: inset 3px 0 0 var(--primary);
}
#tools-main .stats-bar .stat { text-align: left; }
#tools-main .stats-bar .stat-num { font-size: 1.5rem; font-weight: 800; color: var(--text); line-height: 1.2; }
#tools-main .stats-bar .stat-num.hl { color: var(--primary); }
#tools-main .stats-bar .stat-label { font-size: 0.8rem; color: var(--muted); }

/* 兼容旧 header 类名（英文版/其它页仍用 .header） */
.header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  padding: 28px 0;
  text-align: center;
}

/* ===== Search Section ===== */
.search-section {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 0 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  max-width: 100vw;
  overflow-x: clip;
}

.search-box-wrapper {
  position: relative;
  max-width: 560px;
  margin: 0 auto 12px;
}

.search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 11px 44px 11px 46px;
  border: 1.5px solid var(--border-strong);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

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

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

.search-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-soft);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 15px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-clear:hover { background: var(--border); color: var(--text); }

/* ===== Category Tabs ===== */
.category-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  max-width: 100%;
}

.category-tab {
  padding: 5px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

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

.category-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--ink-contrast);
}

/* ===== 首页内容 ===== */
.home-intro { margin: 22px auto 4px; max-width: 1200px; padding: 0 20px; }
.home-intro h1 { font-size: 1.4rem; color: var(--text); margin: 0 0 8px; }
.home-intro p { font-size: 0.92rem; line-height: 1.8; color: var(--muted); margin: 0; }

.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 26px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title .see-all {
  margin-left: auto;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}
.section-title .see-all:hover { color: var(--primary); }

/* 分类区块（首页 & all-tools 统一） */
.category-section { margin-bottom: 36px; }

.category-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  padding-bottom: 8px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.cat-count {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 1px 10px;
}

.category-title .see-all {
  margin-left: auto;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}
.category-title .see-all:hover { color: var(--primary); }

/* ===== 紧凑工具列表 ===== */
.tool-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 8px;
}

.tool-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}

.tool-item:hover {
  background: var(--bg-soft);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
html[data-theme="dark"] .tool-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.5); }

.tool-item .tool-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1;
}

.tool-item .tool-info { display: flex; flex-direction: column; min-width: 0; }
.tool-item .tool-name { font-size: 0.92rem; font-weight: 600; color: var(--text); }
.tool-item .tool-desc {
  font-size: 0.78rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 键盘导航高亮 */
.tool-item.kbd-active, .tool-card.kbd-active {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* ===== chips（最近使用/收藏） ===== */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-size: 0.86rem;
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s;
}

.chip:hover { border-color: var(--text); transform: translateY(-1px); }

.chip .chip-x { margin-left: 2px; color: var(--muted); font-size: 0.85rem; padding: 0 2px; }
.chip .chip-x:hover { color: #dc2626; }

/* ===== No Results ===== */
.no-results { text-align: center; padding: 60px 20px; color: var(--muted); }
.no-results-icon { font-size: 3rem; margin-bottom: 16px; }
.no-results p { font-size: 1.1rem; margin-bottom: 4px; }
.no-results-hint { font-size: 0.9rem; }

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: underline;
  padding: 0;
}

/* ===== 旧大卡片（英文版仍用，同步去 AI 味） ===== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  padding: 24px 0 8px;
}

.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s, opacity 0.3s;
  display: flex;
  flex-direction: column;
  animation: cardIn 0.35s ease both;
}

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

@media (prefers-reduced-motion: reduce) {
  .tool-card, .tool-item { animation: none !important; }
}

.tool-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }

.tool-card .tool-icon {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  background: var(--bg-soft);
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  overflow: hidden;
  line-height: 1;
}

.tool-card h2 { font-size: 1.05rem; margin-bottom: 4px; color: var(--text); }
.tool-card p { font-size: 0.85rem; color: var(--muted); }

/* ===== Footer ===== */
.footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
  padding: 28px 0;
  margin-top: 48px;
  font-size: 0.85rem;
}

.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); text-decoration: underline; }

/* ===== Tool Page Layout ===== */
.tool-page { max-width: 960px; margin: 0 auto; padding: 24px 20px; color: var(--text); }

.tool-page-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; flex-wrap: wrap; }

.back-link { color: var(--muted); text-decoration: none; font-size: 0.88rem; white-space: nowrap; }
.back-link:hover { color: var(--text); text-decoration: underline; }

.tool-page-header h1 { font-size: 1.45rem; color: var(--text); }

/* ===== 表单 ===== */
textarea, input[type="text"], input[type="number"], input[type="date"], input[type="time"], select {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border-strong);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--card);
  color: var(--text);
  resize: vertical;
  transition: border-color 0.15s;
}

textarea:focus, input:focus, select:focus { outline: none; border-color: var(--text); }

.search-box-wrapper .search-input {
  padding: 11px 44px 11px 46px;
  border-radius: 10px;
  background: var(--bg);
}
.search-box-wrapper .search-input:focus {
  border-color: var(--text);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; color: var(--text); }

textarea { min-height: 160px; }

.btn-group { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s, background 0.15s;
}

.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--ink); color: var(--ink-contrast); }
.btn-primary:hover { opacity: 0.88; }

.btn-secondary {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover { border-color: var(--text); }

.result-box {
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  min-height: 100px;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

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

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 90px;
  right: 24px;
  background: var(--ink);
  color: var(--ink-contrast);
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.25s;
  z-index: 9999;
  pointer-events: none;
}

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

/* ===== FAB ===== */
.fab-group {
  position: fixed;
  right: 20px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9000;
}

.fab-btn {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--fab-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--fab-text);
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-2);
  transition: transform 0.15s, border-color 0.15s, opacity 0.2s;
}

.fab-btn:hover { transform: translateY(-2px); border-color: var(--text); }
.fab-btn:active { transform: scale(0.96); }
.fab-btn.fab-hidden { opacity: 0; pointer-events: none; transform: translateY(8px); }

/* ===== Tool Navigation ===== */
.tool-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  margin-top: 40px;
  border-top: 1px solid var(--border);
  gap: 12px;
}

.tool-nav a {
  padding: 8px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  color: var(--text);
  text-decoration: none;
  border-radius: 10px;
  font-size: 0.9rem;
  white-space: nowrap;
}

.tool-nav a:hover { border-color: var(--text); }
.tool-nav .nav-label { font-size: 0.75rem; color: var(--muted); }

/* ===== 宽度约束 ===== */
#share-bar, .related-tools { max-width: 960px; margin: 0 auto; padding: 0 20px; }
#tool-guide { max-width: 920px; margin: 8px auto 0; }

/* ===== 暗色覆盖（工具页内联浅色） ===== */
html[data-theme="dark"] #tool-guide {
  background: var(--card) !important;
  box-shadow: none !important;
  border: 1px solid var(--border);
}
html[data-theme="dark"] #tool-guide h2,
html[data-theme="dark"] #tool-guide strong { color: var(--text) !important; }
html[data-theme="dark"] #tool-guide p,
html[data-theme="dark"] #tool-guide li { color: var(--muted) !important; }

html[data-theme="dark"] .related-tools { background: var(--bg-soft) !important; }
html[data-theme="dark"] .related-tools h3 { color: var(--text) !important; }
html[data-theme="dark"] .related-tools a {
  background: var(--card) !important;
  border-color: var(--border-strong) !important;
  color: var(--text) !important;
}

html[data-theme="dark"] #share-bar > div { border-top-color: var(--border) !important; }
html[data-theme="dark"] #share-bar > div > span { color: var(--muted) !important; }
html[data-theme="dark"] #share-bar button[onclick="copyLink()"] {
  background: var(--bg-soft) !important;
  color: var(--text) !important;
}

html[data-theme="dark"] .breadcrumb-nav,
html[data-theme="dark"] .breadcrumb-nav span { color: var(--muted) !important; }
html[data-theme="dark"] .breadcrumb-nav a { color: var(--text) !important; }

html[data-theme="dark"] .site-footer { color: var(--muted) !important; border-top-color: var(--border) !important; }
html[data-theme="dark"] .site-footer a { color: var(--muted) !important; }

html[data-theme="dark"] .card { background: var(--card) !important; color: var(--text) !important; }
html[data-theme="dark"] table { color: var(--text) !important; }
html[data-theme="dark"] th, html[data-theme="dark"] td { border-color: var(--border) !important; }

#wx-qr > div { background: #fff !important; color: #333 !important; }

/* ===== Focus-visible ===== */
.category-tab:focus-visible,
.search-input:focus-visible,
.btn:focus-visible,
button:focus-visible,
.tool-item:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* ===== Range ===== */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: var(--border-strong);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
  border: 2px solid var(--card);
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
  border: 2px solid var(--card);
}

.site-footer a:hover { color: var(--text) !important; }

.ad-slot { display: none; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .split-view { grid-template-columns: 1fr; }
  .tool-list { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .tool-card { padding: 14px; }
  .logo { font-size: 1.5rem; }
  .site-header { padding: 20px 0; }
  .hstat b { font-size: 1.1rem; }
  .header { padding: 20px 0; }
  .header .logo { font-size: 1.5rem; }
  .search-section { padding: 10px 0 10px; }
  .search-box-wrapper { margin-bottom: 10px; }
  .category-tabs {
    gap: 6px;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    justify-content: flex-start;
    padding: 0 4px 4px;
    max-width: 100%;
  }
  .category-tabs::-webkit-scrollbar { display: none; }
  .category-tab { padding: 5px 12px; font-size: 0.8rem; flex-shrink: 0; }
  .category-title { font-size: 1.05rem; }
  .fab-group { right: 14px; bottom: 16px; }
  .fab-btn { width: 40px; height: 40px; }
  .toast { right: 14px; bottom: 72px; left: 14px; text-align: center; }
}