/* ==========================================================================
   大肥鱼 (DaFeiYu) Blog - Main Stylesheet (dafeiyu.blog)
   Modern Tech & Minimalist Blog
   Default Light Theme with Dark Theme Switching Support
   ========================================================================== */

/* Light Theme Variables (Default / 白色底色) */
:root, [data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #fcfdfe;
  --bg-input: #f1f5f9;
  --bg-input-focus: #ffffff;
  --bg-badge: #f1f5f9;
  
  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-primary-light: rgba(79, 70, 229, 0.08);
  --accent-secondary: #059669;
  --accent-secondary-hover: #047857;
  --accent-secondary-light: rgba(5, 150, 105, 0.08);
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #059669 100%);
  --accent-gradient-purple: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --border-color: #e2e8f0;
  --border-light: rgba(0, 0, 0, 0.06);
  --sidebar-border: #e2e8f0;
  
  --sidebar-width: 240px;
  --right-sidebar-width: 220px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.02);
  --shadow-hover: 0 12px 28px rgba(79, 70, 229, 0.12);
  
  --hero-bg: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
  --hero-glow: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
  --featured-card-bg: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, #ffffff 100%);
  --header-bg: rgba(255, 255, 255, 0.92);
  --btn-outline-bg: #ffffff;
  --btn-outline-hover: #f1f5f9;
  
  --nav-active-bg: linear-gradient(90deg, rgba(79, 70, 229, 0.12) 0%, rgba(79, 70, 229, 0.03) 100%);
  --tag-cloud-bg: #f1f5f9;
  --tag-cloud-hover-bg: rgba(79, 70, 229, 0.1);
  --about-hero-bg: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Dark Theme Variables (深色科技风) */
[data-theme="dark"] {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card: #1e2130;
  --bg-card-hover: #252a3d;
  --bg-input: rgba(255, 255, 255, 0.05);
  --bg-input-focus: rgba(255, 255, 255, 0.08);
  --bg-badge: rgba(255, 255, 255, 0.06);
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-primary-light: rgba(99, 102, 241, 0.15);
  --accent-secondary: #10b981;
  --accent-secondary-hover: #059669;
  --accent-secondary-light: rgba(16, 185, 129, 0.15);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #10b981 100%);
  --accent-gradient-purple: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: #2d3748;
  --border-light: rgba(255, 255, 255, 0.08);
  --sidebar-border: #2d3748;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 25px rgba(99, 102, 241, 0.18);
  
  --hero-bg: linear-gradient(135deg, rgba(30, 33, 48, 0.8) 0%, rgba(26, 29, 39, 0.95) 100%);
  --hero-glow: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  --featured-card-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(30, 33, 48, 0.95) 100%);
  --header-bg: rgba(26, 29, 39, 0.95);
  --btn-outline-bg: rgba(255, 255, 255, 0.03);
  --btn-outline-hover: rgba(255, 255, 255, 0.08);
  
  --nav-active-bg: linear-gradient(90deg, rgba(99, 102, 241, 0.22) 0%, rgba(99, 102, 241, 0.08) 100%);
  --tag-cloud-bg: rgba(255, 255, 255, 0.04);
  --tag-cloud-hover-bg: rgba(99, 102, 241, 0.15);
  --about-hero-bg: linear-gradient(180deg, rgba(30, 33, 48, 0.9) 0%, rgba(26, 29, 39, 0.95) 100%);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

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

ul, ol {
  list-style: none;
}

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

button, input {
  font-family: inherit;
  font-size: inherit;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary-hover);
}

/* Selection */
::selection {
  background: rgba(99, 102, 241, 0.35);
  color: #fff;
}

/* ==========================================================================
   Layout Architecture
   ========================================================================== */
.site-wrapper {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* Mobile Header (Hidden on Desktop) */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 16px;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

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

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

.mobile-theme-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: all var(--transition-fast);
}

.mobile-theme-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 800;
}

/* ==========================================================================
   Left Fixed Sidebar
   ========================================================================== */
.sidebar-left {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  z-index: 900;
  overflow-y: auto;
  scrollbar-width: thin;
  transition: transform var(--transition-normal), background-color 0.25s ease, border-color 0.25s ease;
}

/* Brand Section */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding: 0 6px;
}

.logo-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4D6BFE 0%, #1D4ED8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(77, 107, 254, 0.35);
  flex-shrink: 0;
  user-select: none;
  transition: transform var(--transition-fast);
  padding: 8px;
  box-sizing: border-box;
}

.logo-avatar img,
.logo-avatar svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.mobile-header .logo-avatar {
  padding: 5px;
}

.sidebar-brand:hover .logo-avatar {
  transform: rotate(6deg) scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* Search Box */
.sidebar-search {
  margin-bottom: 24px;
  position: relative;
}

.search-inner {
  position: relative;
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast);
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
  transition: color var(--transition-fast);
}

.search-input {
  width: 100%;
  padding: 9px 12px 9px 34px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: all var(--transition-fast);
}

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

.search-input:focus {
  background: var(--bg-input-focus);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.search-input:focus + .search-icon {
  color: var(--accent-primary);
}

/* Nav Menu */
.sidebar-nav {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding: 0 10px;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-item a i {
  font-size: 15px;
  width: 18px;
  text-align: center;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.nav-item a:hover {
  color: var(--accent-primary);
  background: var(--bg-input);
}

.nav-item a:hover i {
  color: var(--accent-primary);
}

.nav-item.active a {
  color: var(--accent-primary);
  background: var(--nav-active-bg);
  border-left: 3px solid var(--accent-primary);
  font-weight: 600;
}

.nav-item.active a i {
  color: var(--accent-primary);
}

/* Categories in Sidebar */
.sidebar-categories {
  margin-bottom: auto;
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.category-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  transition: all var(--transition-fast);
}

.category-item a:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.category-badge-count {
  font-size: 11px;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  background: var(--bg-badge);
  color: var(--text-muted);
  font-weight: 500;
}

.category-item a:hover .category-badge-count {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
}

.category-item.active a {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  font-weight: 600;
  border-left: 3px solid var(--accent-primary);
}

.category-item.active .category-badge-count {
  background: var(--accent-primary);
  color: #ffffff;
}

/* Active Filter Notice Bar */
.active-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--accent-primary-light);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.filter-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-primary);
}

.filter-info i {
  color: var(--accent-primary);
}

.filter-info strong {
  color: var(--accent-primary);
  font-weight: 600;
}

.filter-count {
  font-size: 12.5px;
  color: var(--text-muted);
}

.filter-clear-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.filter-clear-btn:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* Tools Page Styles */
.tools-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tool-tab-btn {
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tool-tab-btn:hover,
.tool-tab-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  padding: 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-primary);
}

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

.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

[data-theme="dark"] .tool-icon {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.tool-card:hover .tool-icon {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.tool-icon img,
.tool-icon svg {
  width: 100%;
  height: 100%;
  border-radius: 11px;
  object-fit: cover;
  display: block;
  image-rendering: -webkit-optimize-contrast;
}

.tool-header-text {
  flex: 1;
  min-width: 0;
}

.tool-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-category-badge {
  font-size: 11px;
  padding: 2px 7px;
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  border-radius: 4px;
  font-weight: 500;
}

.tool-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex: 1;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.tool-platforms {
  display: flex;
  gap: 5px;
}

.platform-badge {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-input);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.tool-btn {
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-1px);
  color: #ffffff;
}

/* ==========================================================================
   Theme Switcher Control
   ========================================================================== */
.sidebar-theme-wrapper {
  margin-top: 18px;
  margin-bottom: 8px;
}

.theme-switch-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.theme-switch-btn:hover {
  border-color: var(--accent-primary);
  background: var(--accent-primary-light);
}

.theme-switch-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-pill-track {
  width: 38px;
  height: 20px;
  border-radius: 20px;
  background: var(--border-color);
  position: relative;
  transition: background 0.25s ease;
}

.theme-pill-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] .theme-pill-track {
  background: var(--accent-primary);
}

[data-theme="dark"] .theme-pill-thumb {
  transform: translateX(18px);
  background: #ffffff;
}

.theme-icon-sun {
  color: #f59e0b;
  font-size: 14px;
}

.theme-icon-moon {
  color: #818cf8;
  font-size: 14px;
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: inline-block;
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  padding: 36px 40px;
  display: flex;
  justify-content: center;
  width: calc(100% - var(--sidebar-width));
}

.content-container {
  display: flex;
  width: 100%;
  max-width: 1160px;
  gap: 36px;
  position: relative;
}

.content-area {
  flex: 1;
  min-width: 0;
}

/* Right Floating Sidebar */
.sidebar-right {
  width: var(--right-sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 36px;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

/* ==========================================================================
   Cards, Badges & Pills
   ========================================================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal), background-color 0.25s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-primary);
}

/* Category Tag Pills (Light & Dark Adaptive) */
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-full);
  padding: 3px 11px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.tag-pill:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

/* Light Mode Tag Colors */
.tag-proxy {
  background: #eef2ff;
  color: #4f46e5;
  border-color: #c7d2fe;
}

.tag-airport {
  background: #fffbeb;
  color: #d97706;
  border-color: #fde68a;
}

.tag-media {
  background: #fdf2f8;
  color: #db2777;
  border-color: #fbcfe8;
}

.tag-tools {
  background: #fffbeb;
  color: #d97706;
  border-color: #fde68a;
}

.tag-ai {
  background: #f0fdfa;
  color: #0d9488;
  border-color: #99f6e4;
}

.tag-tech {
  background: #eef2ff;
  color: #4f46e5;
  border-color: #c7d2fe;
}

.tag-efficiency {
  background: #ecfdf5;
  color: #059669;
  border-color: #a7f3d0;
}

.tag-tutorial {
  background: #eff6ff;
  color: #2563eb;
  border-color: #bfdbfe;
}

.tag-resource {
  background: #fdf2f8;
  color: #db2777;
  border-color: #fbcfe8;
}

.tag-macos {
  background: #faf5ff;
  color: #9333ea;
  border-color: #e9d5ff;
}

/* Dark Mode Tag Colors Overrides */
[data-theme="dark"] .tag-proxy {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border-color: rgba(99, 102, 241, 0.25);
}

[data-theme="dark"] .tag-airport {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border-color: rgba(245, 158, 11, 0.25);
}

[data-theme="dark"] .tag-media {
  background: rgba(236, 72, 153, 0.15);
  color: #ec4899;
  border-color: rgba(236, 72, 153, 0.25);
}

[data-theme="dark"] .tag-tools {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border-color: rgba(245, 158, 11, 0.25);
}

[data-theme="dark"] .tag-tech {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border-color: rgba(99, 102, 241, 0.25);
}

[data-theme="dark"] .tag-efficiency {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.25);
}

[data-theme="dark"] .tag-tutorial {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
  border-color: rgba(59, 130, 246, 0.25);
}

[data-theme="dark"] .tag-resource {
  background: rgba(236, 72, 153, 0.15);
  color: #ec4899;
  border-color: rgba(236, 72, 153, 0.25);
}

[data-theme="dark"] .tag-macos {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border-color: rgba(168, 85, 247, 0.25);
}

[data-theme="dark"] .tag-ai {
  background: rgba(20, 184, 166, 0.15);
  color: #2dd4bf;
  border-color: rgba(20, 184, 166, 0.25);
}

/* Featured Badge */
.badge-featured {
  background: var(--accent-gradient-purple);
  color: #ffffff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
  letter-spacing: 0.5px;
}

/* Featured Card with Left Gradient Bar */
.featured-card {
  position: relative;
  background: var(--featured-card-bg);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.featured-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  border-radius: 4px 0 0 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-outline {
  background: var(--btn-outline-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--btn-outline-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn-link {
  color: var(--accent-primary);
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.btn-link:hover {
  color: var(--accent-primary-hover);
  gap: 9px;
}

/* ==========================================================================
   Home Page Sections
   ========================================================================== */

/* Hero Banner */
.hero-banner {
  background: var(--hero-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 36px;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-banner::after {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 220px;
  height: 220px;
  background: var(--hero-glow);
  pointer-events: none;
}

.hero-title {
  font-size: 25px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  max-width: 640px;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Section Common */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title i {
  color: var(--accent-primary);
  font-size: 18px;
}

/* Featured Section */
.featured-section {
  margin-bottom: 40px;
}

.featured-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.featured-card .featured-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.featured-card .card-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.featured-card .card-title a:hover {
  color: var(--accent-primary);
}

.featured-card .card-excerpt {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 20px;
}

.featured-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12.5px;
  color: var(--text-muted);
}

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

/* Latest Articles Section */
.articles-section {
  margin-bottom: 30px;
}

.articles-grid {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.article-card {
  padding: 22px 24px;
}

.article-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.article-card .card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.article-card .card-title a {
  color: var(--text-primary);
}

.article-card .card-title a:hover {
  color: var(--accent-primary);
}

.article-card .card-excerpt {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 10px;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.author-avatar-sm {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4D6BFE 0%, #1D4ED8 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  box-sizing: border-box;
}

.author-avatar-sm img,
.author-avatar-sm svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

/* ==========================================================================
   Right Floating Sidebar Widgets
   ========================================================================== */
.widget {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  box-shadow: var(--shadow-card);
}

.widget-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.widget-title i {
  color: var(--accent-primary);
  font-size: 14px;
}

/* Hot Articles List */
.hot-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hot-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.hot-rank {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  font-family: monospace;
  background: var(--bg-input);
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1.2;
  flex-shrink: 0;
  margin-top: 2px;
}

.hot-item:nth-child(1) .hot-rank {
  color: #d97706;
  background: #fef3c7;
}

.hot-item:nth-child(2) .hot-rank {
  color: #4f46e5;
  background: #e0e7ff;
}

.hot-item:nth-child(3) .hot-rank {
  color: #059669;
  background: #d1fae5;
}

[data-theme="dark"] .hot-item:nth-child(1) .hot-rank {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.15);
}

[data-theme="dark"] .hot-item:nth-child(2) .hot-rank {
  color: #818cf8;
  background: rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .hot-item:nth-child(3) .hot-rank {
  color: #10b981;
  background: rgba(16, 185, 129, 0.15);
}

.hot-content {
  flex: 1;
  min-width: 0;
}

.hot-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.hot-title:hover {
  color: var(--accent-primary);
}

/* Featured Widget in Sidebar */
.featured-widget-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.featured-widget-card {
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.featured-widget-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
}

.featured-widget-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.badge-featured-sm {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  line-height: 1.2;
}

.badge-featured-sm i {
  font-size: 9px;
}

.tag-pill-sm {
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid;
}

.featured-widget-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.featured-widget-title:hover {
  color: var(--accent-primary);
}

.featured-widget-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--text-muted);
}

/* Tag Cloud Widget */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag-cloud-item {
  font-size: 11px;
  padding: 4px 9px;
  background: var(--tag-cloud-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.tag-cloud-item:hover {
  background: var(--tag-cloud-hover-bg);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

/* ==========================================================================
   About Page Styles
   ========================================================================== */
.about-hero-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 30px;
  margin-bottom: 30px;
  background: var(--about-hero-bg);
}

.profile-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4D6BFE 0%, #1D4ED8 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 25px rgba(77, 107, 254, 0.4);
  user-select: none;
  padding: 16px;
  box-sizing: border-box;
}

.profile-avatar img,
.profile-avatar svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.profile-name {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.profile-role {
  font-size: 14px;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 16px;
  background: var(--accent-primary-light);
  padding: 3px 14px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.profile-bio {
  color: var(--text-secondary);
  font-size: 14.5px;
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* Skills Section in About */
.skills-card {
  margin-bottom: 30px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.skill-item i {
  font-size: 18px;
  color: var(--accent-primary);
}

.skill-item:hover {
  background: var(--accent-primary-light);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Enhanced Timeline */
.timeline-card {
  margin-bottom: 30px;
}

.timeline {
  position: relative;
  padding-left: 36px;
  margin-top: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 11px;
  width: 2.5px;
  background: linear-gradient(180deg, var(--accent-primary) 0%, #3b82f6 50%, var(--accent-secondary) 100%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 26px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -36px;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(79, 70, 229, 0.35);
  z-index: 2;
  transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent-primary);
  color: #ffffff;
  transform: scale(1.15);
}

.timeline-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  transition: all var(--transition-fast);
}

.timeline-box:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
  transform: translateX(3px);
}

.timeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.timeline-year-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-primary);
  background: var(--accent-primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.timeline-year-badge.current {
  color: var(--accent-secondary);
  background: var(--accent-secondary-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.timeline-content h4 {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.timeline-content p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.timeline-tag-pill {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Contact Card */

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
  .sidebar-right {
    display: none;
  }
  
  .content-container {
    max-width: 860px;
  }
}

@media (max-width: 768px) {
  .mobile-header {
    display: flex;
  }

  .sidebar-left {
    transform: translateX(-100%);
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.15);
  }

  [data-theme="dark"] .sidebar-left {
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.5);
  }

  .sidebar-left.open {
    transform: translateX(0);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 76px 16px 30px 16px;
  }

  .hero-banner {
    padding: 24px 20px;
  }

  .hero-title {
    font-size: 22px;
  }

  .card {
    padding: 18px;
  }
}

/* ==========================================================================
   Tags Page (tags.html) Dedicated Styles
   ========================================================================== */
.tags-cloud-card {
  margin-bottom: 24px;
}

.tags-search-wrapper {
  margin-bottom: 20px;
}

.tags-search-input {
  width: 100%;
  padding: 12px 18px 12px 42px;
  background: var(--search-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: all 0.25s ease;
}

.tags-search-input:focus {
  border-color: var(--accent-primary);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.tags-search-box-inner {
  position: relative;
  display: flex;
  align-items: center;
}

.tags-search-box-inner .search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  font-size: 15px;
  pointer-events: none;
}

.tags-cloud-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-wall-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--tag-cloud-bg);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.tag-wall-pill i {
  font-size: 12px;
  opacity: 0.7;
}

.tag-wall-pill .tag-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.06);
  color: var(--text-muted);
  transition: all 0.2s ease;
}

[data-theme="dark"] .tag-wall-pill .tag-count {
  background: rgba(255, 255, 255, 0.08);
}

.tag-wall-pill:hover {
  background: var(--hover-bg);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.tag-wall-pill:hover .tag-count {
  background: var(--accent-primary);
  color: #fff;
}

.tag-wall-pill.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
  transform: translateY(-2px);
}

.tag-wall-pill.active i {
  opacity: 1;
}

.tag-wall-pill.active .tag-count {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

/* Tag Sections List */
.tag-sections-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tag-section-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  transition: all 0.25s ease;
}

.tag-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.tag-section-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tag-section-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(79, 70, 229, 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

[data-theme="dark"] .tag-section-icon {
  background: rgba(99, 102, 241, 0.18);
  color: #818cf8;
}

.tag-section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.tag-section-badge {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--search-bg);
  padding: 2px 8px;
  border-radius: 12px;
}

.tag-section-link {
  font-size: 13px;
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.tag-section-link:hover {
  text-decoration: underline;
  gap: 6px;
}

.tag-articles-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tag-article-item {
  display: flex;
  flex-direction: column;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--search-bg);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.tag-article-item:hover {
  background: var(--hover-bg);
  border-color: var(--border-color);
  transform: translateX(4px);
}

.tag-article-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.tag-article-date {
  font-size: 12.5px;
  color: var(--text-muted);
}

.tag-article-title-link {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
  line-height: 1.45;
}

.tag-article-title-link:hover {
  color: var(--accent-primary);
}

.tag-article-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}



/* ==========================================================================
   Back To Top Floating Button (右下角一键置顶)
   ========================================================================== */
.back-to-top-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.2s ease,
              color 0.2s ease,
              border-color 0.2s ease,
              box-shadow 0.2s ease;
  outline: none;
}

.back-to-top-btn.show,
.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.back-to-top-btn:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
}

.back-to-top-btn:active {
  transform: translateY(-1px) scale(0.96);
}

@media (max-width: 768px) {
  .back-to-top-btn {
    bottom: 24px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 15px;
  }
}