/* ==========================================================================
   沭阳小南网络科技 - 原创设计风格
   参照力海猫科技风：蓝色主色调 + 金色CTA + 卡片布局 + 白/深色双主题
   ========================================================================== */

/* CSS Variables - 支持白/深色主题切换 */
:root {
  /* === 主题色板 === */
  /* 深色主题（默认） */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a25;
  --bg-card-hover: #22222f;
  --bg-elevated: #252532;
  
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b80;
  
  /* 主色调 - 科技蓝 */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: rgba(59, 130, 246, 0.15);
  
  /* 强调色 - 金橙色 */
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-light: rgba(245, 158, 11, 0.15);
  
  /* 功能色 */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-hero: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
  --gradient-card-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-card-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-card-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-card-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  
  /* 边框 */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-light: rgba(255, 255, 255, 0.12);
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
  
  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  
  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* 兼容旧变量名 */
  --ink: #0f172a;
  --ink-muted: #64748b;
  --accent-blue: #3b82f6;
}

/* 白色主题 */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-elevated: #ffffff;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-color: rgba(0, 0, 0, 0.06);
  --border-color-light: rgba(0, 0, 0, 0.1);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);
  
  --gradient-hero: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

input, textarea, select {
  font-family: inherit;
  outline: none;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: 1400px;
}

.section {
  padding: var(--space-4xl) 0;
}

.section-sm {
  padding: var(--space-3xl) 0;
}

.section-lg {
  padding: calc(var(--space-4xl) * 1.5) 0;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.display-xl {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.display-lg {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.display-md {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.text-accent {
  color: var(--accent);
}

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

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

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

[data-theme="light"] .navbar {
  background: rgba(248, 250, 252, 0.9);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.98);
  box-shadow: var(--shadow-md);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.navbar-logo {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.25rem;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.navbar-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--text-primary);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-color-light);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

.theme-toggle .icon-moon {
  display: none;
}

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

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

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-switcher-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.lang-switcher-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-color-light);
}

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

.lang-switcher-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  z-index: 1001;
}

.lang-switcher-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher-dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  right: 20px;
  width: 12px;
  height: 12px;
  background: var(--bg-card);
  border-left: 1px solid var(--border-color);
  border-top: 1px solid var(--border-color);
  transform: rotate(45deg);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
}

.lang-option:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.lang-option.active {
  color: var(--primary);
  font-weight: 600;
}

/* Mobile Menu */
.navbar-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.navbar-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

@media (max-width: 991px) {
  .navbar-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }
  
  .navbar-menu.active {
    transform: translateX(0);
  }
  
  .navbar-toggle {
    display: flex;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* Primary Button - 蓝色主按钮 */
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
}

/* Accent Button - 金橙色CTA */
.btn-accent {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-accent:hover {
  background: var(--accent-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color-light);
}

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

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

/* Icon Button */
.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon-sm {
  width: 36px;
  height: 36px;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-elevated {
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
}

/* Service Card */
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--primary);
  transition: all var(--transition-base);
}

.service-card:hover .service-card-icon {
  background: var(--primary);
  color: white;
  transform: scale(1.1);
}

.service-card-icon svg {
  width: 28px;
  height: 28px;
}

.service-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.service-card-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Case Card */
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.case-card-image {
  height: 200px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 3rem;
  overflow: hidden;
}

.case-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card-content {
  padding: var(--space-lg);
}

.case-card-tags {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.case-card-tag {
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.case-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.case-card-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* News Card */
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-color-light);
}

.news-card-image {
  height: 180px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 2.5rem;
}

.news-card-content {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.news-card-category {
  color: var(--primary);
  font-weight: 600;
}

.news-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
}

.news-card:hover .news-card-title {
  color: var(--primary);
}

.news-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Stat Card - 大数字展示 */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

.stat-card.accent::before {
  background: var(--gradient-accent);
}

.stat-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.stat-card.accent .stat-number {
  color: var(--accent);
}

.stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* Feature Card */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 72px;
  height: 72px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  color: white;
  font-size: 2rem;
}

.feature-icon svg {
  width: 36px;
  height: 36px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-4xl) 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  background: var(--primary-light);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-xl);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.hero-title-highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: 600px;
  margin: var(--space-4xl) auto 0;
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-color);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* ==========================================================================
   Section Headers
   ========================================================================== */

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px;
  background: var(--primary-light);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-lg);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-4xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.cta-section .section-title,
.cta-section .section-desc {
  color: white;
}

.cta-section .section-desc {
  opacity: 0.9;
}

.cta-section .btn-accent {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-accent:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.cta-section .btn-outline {
  border-color: rgba(255, 255, 255, 0.4);
  color: white;
}

.cta-section .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .navbar-brand {
  margin-bottom: var(--space-md);
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.footer-contact-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary);
}

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

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-brand {
    grid-column: span 2;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-brand {
    grid-column: span 1;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   Badges & Tags
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
}

.badge-accent {
  background: var(--accent-light);
  color: var(--accent);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes rotate-slow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes bounce-in {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--primary); }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-pulse-ring {
  animation: pulse-ring 2s infinite;
}

.animate-bounce-in {
  animation: bounce-in 0.6s ease forwards;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animate-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children animation */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
}

.stagger-children.animate-visible > *:nth-child(1) { animation: fadeInUp 0.5s ease 0.1s forwards; }
.stagger-children.animate-visible > *:nth-child(2) { animation: fadeInUp 0.5s ease 0.2s forwards; }
.stagger-children.animate-visible > *:nth-child(3) { animation: fadeInUp 0.5s ease 0.3s forwards; }
.stagger-children.animate-visible > *:nth-child(4) { animation: fadeInUp 0.5s ease 0.4s forwards; }
.stagger-children.animate-visible > *:nth-child(5) { animation: fadeInUp 0.5s ease 0.5s forwards; }
.stagger-children.animate-visible > *:nth-child(6) { animation: fadeInUp 0.5s ease 0.6s forwards; }

/* ==========================================================================
   Floating Contact Bar
   ========================================================================== */

.floating-contact {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.floating-contact-item {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.6875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.floating-contact-item svg {
  width: 22px;
  height: 22px;
  margin-bottom: 2px;
}

.floating-contact-item:hover {
  transform: scale(1.15) translateX(-4px);
}

.floating-contact-item.wechat {
  background: linear-gradient(135deg, #07c160, #05a350);
}

.floating-contact-item.phone {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.floating-contact-item.biz {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.floating-contact-item.top {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.floating-contact-item.top:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Tooltip for floating contact */
.floating-contact-item::before {
  content: attr(data-tip);
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) scale(0);
  padding: 8px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
}

.floating-contact-item:hover::before {
  transform: translateY(-50%) scale(1);
  opacity: 1;
}

.floating-contact-item::after {
  content: '';
  position: absolute;
  right: calc(100% + 6px);
  top: 50%;
  transform: translateY(-50%) scale(0);
  width: 0;
  height: 0;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 6px solid var(--border-color);
  opacity: 0;
  transition: all 0.3s ease;
}

.floating-contact-item:hover::after {
  transform: translateY(-50%) scale(1);
  opacity: 1;
}

/* Mobile: move to bottom */
@media (max-width: 768px) {
  .floating-contact {
    right: 12px;
    top: auto;
    bottom: 24px;
    transform: none;
    flex-direction: row;
  }
  
  .floating-contact-item {
    width: 48px;
    height: 48px;
    font-size: 0.625rem;
  }
  
  .floating-contact-item svg {
    width: 18px;
    height: 18px;
  }
  
  .floating-contact-item::before,
  .floating-contact-item::after {
    display: none;
  }
}

/* ==========================================================================
   Particle Background Effect
   ========================================================================== */

.particles-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: particle-float linear infinite;
}

@keyframes particle-float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ==========================================================================
   Marquee / Scrolling Text
   ========================================================================== */

.marquee-container {
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}

.marquee-content {
  display: inline-flex;
  animation: marquee 30s linear infinite;
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  padding: 0 var(--space-2xl);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-muted);
  opacity: 0.5;
}

.marquee-item svg {
  width: 24px;
  height: 24px;
  margin-right: var(--space-sm);
  color: var(--primary);
}

/* ==========================================================================
   Glow Effects
   ========================================================================== */

.glow-primary {
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.glow-accent {
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.text-glow {
  text-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.hidden { display: none; }

/* Alert messages */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
}
.alert-error {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.alert-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.alert-success {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

@media (max-width: 768px) {
  .hide-mobile { display: none; }
}

@media (min-width: 769px) {
  .show-mobile { display: none; }
}

/* ==========================================================================
   Page Header
   ========================================================================== */
.page-header {
  background: var(--gradient-hero);
  padding: calc(72px + var(--space-4xl)) 0 var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header .display-lg {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.page-header .subhead {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Content Page
   ========================================================================== */
.content-page {
  padding: var(--space-3xl) 0;
}

/* ==========================================================================
   Subhead
   ========================================================================== */
.subhead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Margin Utilities
   ========================================================================== */
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

/* ==========================================================================
   Contact Item
   ========================================================================== */
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.contact-item .icon {
  flex-shrink: 0;
}

/* ==========================================================================
   Form Control (alias for form-input)
   ========================================================================== */
.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder {
  color: var(--text-muted);
}

/* ==========================================================================
   Tag Active State
   ========================================================================== */
.tag.active {
  background: var(--accent-primary);
  color: white;
}

/* ==========================================================================
   Feature Card (enhanced)
   ========================================================================== */
.feature-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
}

.feature-card-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.feature-card-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ==========================================================================
   Content Body
   ========================================================================== */
.content-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: var(--space-xl) 0 var(--space-md);
  color: var(--text-primary);
}

.content-body p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.content-body ul {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.content-body ul li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-lg);
  position: relative;
  color: var(--text-secondary);
}

.content-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ==========================================================================
   Detail Header / Meta
   ========================================================================== */
.detail-meta {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  margin-top: var(--space-md);
}

/* ==========================================================================
   News Card Category (in card)
   ========================================================================== */
.news-card-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Admin Login
   ========================================================================== */
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
}

.admin-login::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.login-card .login-logo {
  width: 56px;
  height: 56px;
  background: var(--gradient-card-1);
  border-radius: var(--radius-lg);
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}

.login-card .login-logo svg {
  width: 28px;
  height: 28px;
  color: white;
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--space-xs);
}

.login-card .login-subtitle {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.login-card .form-group {
  margin-bottom: var(--space-lg);
}

.login-card .form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.login-card .form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-family: inherit;
}

.login-card .form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
}

.login-card .form-control::placeholder {
  color: var(--text-muted);
}

.login-card .btn-login {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  background: var(--gradient-card-1);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.login-card .btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.login-card .btn-login:active {
  transform: translateY(0);
}

.login-card .alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
}

.login-card .alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.login-card .alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.login-footer {
  text-align: center;
  margin-top: var(--space-xl);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Admin Dashboard (亮色风格)
   ========================================================================== */
.admin-layout {
  display: flex;
  min-height: 100vh;
  background: #f1f5f9;
}

.admin-sidebar {
  width: 260px;
  background: #ffffff;
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.sidebar-header h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 4px;
}

.sidebar-header p {
  font-size: 0.8125rem;
  color: #64748b;
}

.sidebar-nav {
  list-style: none;
  padding: 12px;
  flex: 1;
  margin: 0;
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #475569;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: #eff6ff;
  color: #2563eb;
}

.sidebar-nav a svg {
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.sidebar-footer a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #64748b;
  font-size: 13px;
  transition: color 0.2s ease;
}

.sidebar-footer a:hover {
  color: #2563eb;
}

.admin-main {
  flex: 1;
  margin-left: 260px;
  padding: 32px;
  min-height: 100vh;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.admin-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #0f172a;
}

.admin-header .caption {
  color: #64748b;
  font-size: 0.9375rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.admin-layout .stat-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.admin-layout .stat-card h3 {
  font-size: 2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 6px;
}

.admin-layout .stat-card p {
  font-size: 0.875rem;
  color: #64748b;
  margin: 0;
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.data-table thead th {
  text-align: left;
  padding: 14px 16px;
  font-weight: 600;
  color: #475569;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  background: #f8fafc;
}

.data-table tbody td {
  padding: 14px 16px;
  color: #334155;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.table-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Admin Cards & Forms */
.admin-main .card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.admin-main .card:hover {
  transform: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.admin-main .form-control {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.1);
  color: #0f172a;
}

.admin-main .form-control:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.admin-main .btn-secondary {
  background: #f1f5f9;
  color: #334155;
  border-color: rgba(0, 0, 0, 0.08);
}

.admin-main .btn-secondary:hover {
  background: #e2e8f0;
  border-color: rgba(0, 0, 0, 0.12);
}

/* Admin Alerts */
.admin-main .alert-success {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

.admin-main .alert-error {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Admin Responsive */
@media (max-width: 768px) {
  .admin-sidebar {
    display: none;
  }
  .admin-main {
    margin-left: 0;
    padding: 20px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}