/* ========================================
   AI工具集 - 全局样式
   还原React版本设计：深蓝黑暗色 + 天蓝强调色
   ======================================== */

/* ---- CSS Variables ---- */
:root {
  /* Light theme - Elegant warm gray */
  --bg-body: #F3F0EB;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F6F2;
  --bg-card: #FFFFFF;
  --bg-sidebar: #EDE9E3;
  --bg-hover: #F7F4F0;
  --bg-input: #FFFFFF;
  --bg-border: #DDD8D1;
  --text-primary: #1C1917;
  --text-secondary: #57534E;
  --text-muted: #A8A29E;
  --text-placeholder: #D6D3D1;
  --accent: #38BDF8;
  --accent-hover: #0EA5E9;
  --accent-secondary: #818CF8;
  --accent-light: rgba(56, 189, 248, 0.12);
  --border-color: #DDD8D1;
  --border-hover: #B8B0A8;
  --shadow-sm: 0 1px 3px rgba(28,25,23,0.06);
  --shadow-md: 0 4px 12px rgba(28,25,23,0.08);
  --shadow-lg: 0 8px 24px rgba(28,25,23,0.10);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --header-height: 60px;
  --sidebar-width: 240px;
  --transition: all 0.25s ease;
}

/* ---- Dark Theme - Deep navy ---- */
html.dark {
  --bg-body: #0A0F1C;
  --bg-primary: #0B1122;
  --bg-secondary: #111827;
  --bg-card: #111827;
  --bg-sidebar: #0D1320;
  --bg-hover: #1A2235;
  --bg-input: #111827;
  --bg-border: #1E293B;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-placeholder: #475569;
  --accent: #38BDF8;
  --accent-hover: #0EA5E9;
  --accent-secondary: #818CF8;
  --accent-light: rgba(56, 189, 248, 0.15);
  --border-color: #1E293B;
  --border-hover: #334155;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
img { max-width: 100%; display: block; }

/* ---- Gradient Text ---- */
.gradient-text {
  background: linear-gradient(135deg, #38BDF8 0%, #818CF8 50%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Header
   ======================================== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}
.header-inner {
  width: 100%; margin: 0 auto;
  height: 100%; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
}
.sidebar-toggle {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  flex-shrink: 0;
}
.sidebar-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px;
  color: var(--text-primary);
  flex-shrink: 0;
}
.logo-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, #38BDF8 0%, #818CF8 100%);
  display: flex; align-items: center; justify-content: center;
}
.logo-icon svg { stroke: white; }

/* ---- Main Navigation ---- */
.main-nav {
  display: flex; align-items: center; gap: 4px;
  margin-left: 40px; flex: 1;
}
.nav-item {
  position: relative; padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-item:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-item.has-dropdown > a { color: inherit; }
.nav-item.has-dropdown::after {
  content: '\25BC'; font-size: 8px; margin-left: 4px; opacity: 0.5;
}

/* Dropdown */
.dropdown {
  position: absolute; top: 100%; left: 0;
  min-width: 200px; padding: 8px 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden;
  transform: translateY(-4px);
  transition: var(--transition);
  z-index: 1001;
}
.nav-item.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 8px 16px;
  font-size: 13px; color: var(--text-secondary);
  transition: var(--transition);
}
.dropdown a:hover { background: var(--bg-hover); color: var(--text-primary); }
.dropdown-title {
  padding: 6px 16px; font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--text-muted); border-bottom: 1px solid var(--border-color);
  margin-bottom: 4px;
}

/* ---- Header Actions ---- */
.header-actions {
  display: flex; align-items: center; gap: 8px;
  flex-shrink: 0;
}
.theme-toggle {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}
.theme-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
.mobile-menu-btn {
  display: none; width: 36px; height: 36px;
  font-size: 20px; color: var(--text-secondary);
}

/* ========================================
   Mobile Menu
   ======================================== */
.mobile-menu {
  position: fixed; top: var(--header-height); left: 0; right: 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
  display: none; flex-direction: column;
  z-index: 999; max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  padding: 12px 24px; font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}
.mobile-menu a:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ========================================
   Layout
   ======================================== */
.layout {
  display: flex; width: 100%; margin: 0 auto;
  padding-top: var(--header-height); min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width); flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 20px 0;
  position: sticky; top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  transition: width 0.3s ease, padding 0.3s ease;
}
.sidebar.collapsed {
  width: 60px;
  overflow: visible;
}
.sidebar.collapsed .sidebar-link {
  font-size: 0;
  gap: 0;
}
.sidebar.collapsed .sidebar-link .s-icon {
  width: 20px; height: 20px;
}
.sidebar.collapsed .sub-toggle {
  display: none;
}
.sidebar.collapsed .sub-list {
  display: none !important;
}
.sidebar.collapsed .sidebar-footer {
  display: none;
}
.sidebar.collapsed .sidebar-nav {
  padding: 0 8px;
}
.sidebar.collapsed .sidebar-item {
  justify-content: center;
  padding: 10px 4px;
}
.sidebar-nav { padding: 0 12px; }
.sidebar-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.sidebar-item:hover { background: var(--bg-hover); }
.sidebar-item.active { background: var(--accent-light); }
.sidebar-item.active .sidebar-link { color: var(--accent); font-weight: 600; }
.sidebar-link {
  font-size: 14px; color: var(--text-secondary);
  flex: 1; transition: var(--transition);
  display: flex; align-items: center; gap: 10px;
}
.sidebar-link:hover { color: var(--text-primary); }
.sidebar-link .s-icon {
  width: 18px; height: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition);
}
.sidebar-item:hover .s-icon,
.sidebar-item.active .s-icon {
  color: var(--accent);
}
.sub-toggle {
  width: 24px; height: 24px; border-radius: 4px;
  font-size: 14px; color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.sub-toggle:hover { color: var(--text-primary); background: var(--bg-hover); }
.sub-toggle.open { transform: rotate(90deg); }
.sub-list {
  display: none; padding: 4px 0 4px 20px;
  border-left: 2px solid var(--border-color); margin-left: 12px;
}
.sub-list.open { display: block; }
.sub-item {
  display: block; padding: 6px 12px;
  font-size: 13px; color: var(--text-muted);
  border-radius: var(--radius-sm); transition: var(--transition);
}
.sub-item:hover { color: var(--text-primary); background: var(--bg-hover); }
.sidebar-footer {
  margin-top: 20px; padding: 16px 12px 0;
  border-top: 1px solid var(--border-color);
}
.sidebar-footer a {
  display: block; padding: 8px 12px;
  font-size: 13px; color: var(--text-muted);
  border-radius: var(--radius-sm); transition: var(--transition);
}
.sidebar-footer a:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ---- Main Content ---- */
.main-content {
  flex: 1; padding: 0;
  min-width: 0;
  width: 100%;
}

/* ========================================
   V7 - Hero Search Section
   ======================================== */
.hero {
  position: relative;
  padding: 80px 32px 40px;
  text-align: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.3;
}
html.dark .hero-bg { opacity: 0.4; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, var(--bg-body) 0%, transparent 30%, transparent 70%, var(--bg-body) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 700px; margin: 0 auto;
}

/* Badge */
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
  text-transform: uppercase;
  background: linear-gradient(135deg, rgba(56,189,248,0.15), rgba(129,140,248,0.15));
  border: 1px solid rgba(56,189,248,0.2);
  color: var(--accent);
}

/* Title */
.hero-title-main {
  font-size: 48px; font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 20px;
  line-height: 1.1;
}
.hero-desc {
  font-size: 16px; color: var(--text-secondary);
  margin-top: 12px;
}

/* Search Tabs */
.search-tabs {
  display: flex; align-items: center; justify-content: center;
  gap: 2px; margin-top: 28px; margin-bottom: 12px;
}
.search-tab {
  position: relative;
  padding: 6px 16px; border-radius: 8px;
  font-size: 14px; font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.search-tab:hover { color: var(--text-primary); }
.search-tab.active {
  color: var(--text-primary);
  background: var(--bg-input);
}

/* Search Box V7 */
.search-box-v7 {
  position: relative;
  display: flex; align-items: center;
  background: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: 999px;
  padding: 0 6px 0 20px;
  height: 54px;
  transition: var(--transition);
  max-width: 600px; margin: 0 auto;
}
.search-box-v7:focus-within {
  border-color: var(--accent);
}
.search-box-v7 .search-icon {
  color: var(--text-muted); flex-shrink: 0; margin-right: 12px;
}
.search-box-v7 input {
  flex: 1; border: none; outline: none;
  background: transparent; color: var(--text-primary);
  font-size: 14px; font-family: inherit;
  height: 100%;
}
.search-box-v7 input::placeholder { color: var(--text-placeholder); }
.search-btn-v7 {
  width: 42px; height: 42px; border-radius: 999px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  color: white;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition); flex-shrink: 0;
  border: none; cursor: pointer;
}
.search-btn-v7:hover { opacity: 0.9; }

/* Search Engines */
.search-engines {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; margin-top: 12px;
}
.search-engines .engine {
  font-size: 12px; color: var(--text-muted);
  cursor: pointer; transition: var(--transition);
}
.search-engines .engine:hover { color: var(--text-primary); }
.search-engines .engine.active {
  color: var(--accent); font-weight: 600;
}

/* ========================================
   V7 - Quick Cards
   ======================================== */
.quick-cards-wrap {
  padding: 16px 32px;
}
.quick-cards-scroll {
  display: flex; gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 4px;
}
.quick-cards-scroll::-webkit-scrollbar { display: none; }
.quick-card {
  position: relative;
  flex-shrink: 0;
  width: 180px; height: 110px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.quick-card:hover {
  border-color: rgba(56,189,248,0.3);
  transform: translateY(-4px);
}
.quick-card-bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.4;
  transition: opacity 0.5s;
}
.quick-card:hover .quick-card-bg { opacity: 0.6; }
.quick-card-overlay {
  position: absolute; inset: 0;
  opacity: 0.8;
}
.quick-card-inner {
  position: relative; z-index: 2;
  height: 100%; padding: 16px;
  display: flex; flex-direction: column;
  justify-content: space-between;
}
.quick-card-icon {
  width: 32px; height: 32px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.quick-card-title {
  font-size: 14px; font-weight: 600;
  color: var(--text-primary);
}
.quick-card-sub {
  font-size: 12px; color: var(--text-muted);
  margin-top: 2px;
}

/* ========================================
   V7 - Banner Ads
   ======================================== */
.banner-ads {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; padding: 12px 32px;
}
.banner-ad {
  position: relative;
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition);
}
.banner-ad:hover { transform: scale(1.01); }
.banner-ad-bg {
  position: absolute; right: 0; top: 0;
  width: 128px; height: 100%;
  object-fit: cover; opacity: 0.2;
  transition: opacity 0.5s;
}
.banner-ad:hover .banner-ad-bg { opacity: 0.4; }
.banner-ad-content {
  position: relative; z-index: 2;
  flex: 1; min-width: 0;
}
.banner-ad-brand {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 6px;
}
.banner-ad-brand-icon {
  width: 24px; height: 24px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: white;
}
.banner-ad-brand span {
  font-size: 12px; color: var(--text-secondary);
}
.banner-ad-title {
  font-size: 14px; font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.banner-ad-desc {
  font-size: 12px; color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.banner-ad-btn {
  position: relative; z-index: 2;
  flex-shrink: 0;
  display: flex; align-items: center; gap: 4px;
  padding: 6px 14px; border-radius: 8px;
  font-size: 12px; font-weight: 500; color: white;
  white-space: nowrap;
  transition: opacity 0.3s;
}
.banner-ad-btn:hover { opacity: 0.9; }

/* ========================================
   V7 - Section Header
   ======================================== */
.section-v7 {
  padding: 20px 32px;
}
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.section-title-v7 {
  display: flex; align-items: center; gap: 10px;
}
.section-title-v7 h2 {
  font-size: 18px; font-weight: 700;
  color: var(--text-primary);
}
.section-icon {
  width: 32px; height: 32px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.section-icon-bar {
  width: 4px; height: 24px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-secondary) 100%);
}
.section-more {
  display: flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--text-muted);
  transition: var(--transition);
}
.section-more:hover { color: var(--accent); }
.section-more svg { width: 14px; height: 14px; }

/* Sub Category Tags */
.sub-cat-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 0 32px 16px;
}
.sub-cat-tags span,
.sub-cat-tags a {
  padding: 5px 12px; border-radius: 8px;
  font-size: 12px; color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

/* ========================================
   Generic Tool Cards (used by category/search/tag/tool pages)
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; margin-bottom: 28px;
  padding: 0 32px;
}
.tool-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}
.tool-card:hover {
  border-color: rgba(56,189,248,0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.tool-card .card-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 12px;
}
.tool-card .card-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; color: white;
  flex-shrink: 0;
}
.tool-card .card-title {
  font-size: 15px; font-weight: 600;
  color: var(--text-primary); line-height: 1.4;
}
.tool-card .card-desc {
  font-size: 13px; color: var(--text-secondary);
  line-height: 1.6; margin-bottom: 14px;
}
.tool-card .card-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}

/* ========================================
   V7 - Compact Cards (热门/最新)
   ======================================== */
.card-grid-compact {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.tool-card-compact {
  display: flex; align-items: center; gap: 10px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: var(--transition);
}
.tool-card-compact:hover {
  border-color: rgba(56,189,248,0.4);
  transform: translateY(-2px);
}
.card-compact-icon-wrap {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.card-compact-info {
  min-width: 0; flex: 1;
}
.card-compact-name {
  display: flex; align-items: center; gap: 4px;
  font-size: 14px; font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card-compact-desc {
  font-size: 12px; color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.badge-new {
  display: inline-block;
  padding: 1px 5px; border-radius: 4px;
  font-size: 10px; font-weight: 700; color: white;
  background: linear-gradient(135deg, #F472B6, #A78BFA);
  flex-shrink: 0;
}

/* ========================================
   V7 - Large Cards (分类工具)
   ======================================== */
.card-grid-v7 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.tool-card-v7 {
  position: relative;
  display: block;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition);
}
.tool-card-v7::before {
  content: '';
  position: absolute; inset: 0; border-radius: 12px;
  background: linear-gradient(135deg, rgba(56,189,248,0) 0%, rgba(129,140,248,0) 100%);
  transition: all 0.5s;
  pointer-events: none;
}
.tool-card-v7:hover {
  border-color: rgba(56,189,248,0.4);
  box-shadow: var(--shadow-lg);
}
.tool-card-v7:hover::before {
  background: linear-gradient(135deg, rgba(56,189,248,0.05) 0%, rgba(129,140,248,0.05) 100%);
}
.card-v7-top {
  position: relative; z-index: 2;
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 14px;
}
.card-v7-icon-wrap {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
}
.card-v7-name {
  position: relative; z-index: 2;
  font-size: 15px; font-weight: 600;
  color: var(--text-primary);
  transition: color 0.3s;
}
.tool-card-v7:hover .card-v7-name { color: var(--accent); }
.card-v7-desc {
  position: relative; z-index: 2;
  font-size: 13px; color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   V7 - News List
   ======================================== */
.news-list-v7 {
  display: flex; flex-direction: column; gap: 10px;
}
.news-item-v7 {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: var(--transition);
}
.news-item-v7:hover { border-color: var(--border-hover); }
.news-v7-tag {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  flex-shrink: 0;
}
.news-v7-body { flex: 1; min-width: 0; }
.news-v7-title {
  font-size: 15px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 8px;
  line-height: 1.4;
}
.news-v7-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: 12px; color: var(--text-muted);
}

/* ========================================
   Category Page
   ======================================== */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  padding: 20px 32px 0;
  font-size: 14px; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); transition: var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .current { color: var(--text-primary); font-weight: 500; }

.cat-header {
  padding: 24px; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin: 16px 32px 20px;
}
.cat-header h1 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.cat-header p { font-size: 14px; color: var(--text-secondary); }

/* ========================================
   Tool Detail Page
   ======================================== */
.tool-hero {
  display: flex; align-items: flex-start; gap: 24px;
  padding: 28px; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin: 16px 32px 20px;
}
.tool-hero-icon {
  width: 72px; height: 72px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; font-weight: 700; color: white;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
}
.tool-hero-info { flex: 1; }
.tool-hero-title { font-size: 24px; font-weight: 700; margin-bottom: 8px; }
.tool-hero-desc { font-size: 15px; color: var(--text-secondary); margin-bottom: 14px; }
.tool-hero-actions { display: flex; gap: 12px; }
.btn-primary {
  padding: 10px 24px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  color: white;
  font-size: 14px; font-weight: 600;
  transition: var(--transition);
}
.btn-primary:hover { opacity: 0.9; }
.btn-secondary {
  padding: 10px 24px; border-radius: var(--radius-sm);
  background: var(--bg-hover); color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 14px; font-weight: 500;
  transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--text-primary); }

.feature-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  margin: 0 32px 20px;
}
.feature-item {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px; color: var(--text-secondary);
}
.feature-item svg {
  width: 18px; height: 18px;
  color: var(--accent); flex-shrink: 0;
}

.detail-content {
  margin: 0 32px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 15px; line-height: 1.9;
  color: var(--text-secondary);
}
.detail-content h2 {
  font-size: 20px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 14px;
}
.detail-content h3 {
  font-size: 17px; font-weight: 600;
  color: var(--text-primary); margin: 20px 0 10px;
}
.detail-content p { margin-bottom: 12px; }
.detail-content ul { margin-bottom: 14px; padding-left: 20px; }
.detail-content li { margin-bottom: 6px; }

/* ========================================
   Search & Tag Pages
   ======================================== */
.search-header {
  padding: 24px; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin: 16px 32px 20px; text-align: center;
}
.search-header h1 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.search-header p { font-size: 14px; color: var(--text-secondary); }
.no-results {
  text-align: center; padding: 60px 32px;
  color: var(--text-muted);
}

/* ========================================
   News Detail Page
   ======================================== */
.news-detail-meta {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  margin-top: 20px; padding: 32px 32px 24px;
  border-top: 1px solid var(--border-color);
}
.footer-inner { width: 100%; }
.footer-brand { margin-bottom: 24px; }
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700;
  margin-bottom: 10px;
}
.footer-desc { font-size: 14px; color: var(--text-muted); max-width: 480px; }
.footer-links {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-bottom: 24px;
}
.footer-links h4 {
  font-size: 14px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 12px;
}
.footer-links a {
  display: block; font-size: 13px;
  color: var(--text-muted); padding: 4px 0;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.footer-tags a {
  padding: 4px 10px; border-radius: 20px;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  font-size: 12px;
}
.footer-bottom {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex; justify-content: space-between;
  font-size: 12px; color: var(--text-muted);
}

/* ========================================
   Scrollbar
   ======================================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1280px) {
  .card-grid-v7 { grid-template-columns: repeat(4, 1fr); }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .sidebar { position: fixed; left: 0; top: var(--header-height); z-index: 998; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .card-grid-v7 { grid-template-columns: repeat(3, 1fr); }
  .banner-ads { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
  .header-inner { padding: 0 16px; }
  .hero { padding: 60px 16px 32px; }
  .hero-title-main { font-size: 36px; }
  .card-grid-v7 { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; padding: 0 16px; }
  .quick-cards-wrap, .banner-ads, .section-v7 { padding-left: 16px; padding-right: 16px; }
  .breadcrumb, .cat-header, .search-header, .feature-list, .detail-content { margin-left: 16px; margin-right: 16px; }
  .tool-hero { margin-left: 16px; margin-right: 16px; flex-direction: column; align-items: center; text-align: center; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; gap: 4px; text-align: center; }
  .site-footer { padding-left: 16px; padding-right: 16px; }
}

@media (max-width: 480px) {
  .card-grid-v7 { grid-template-co