/* ============================================
   Global CSS - 全栈系统设计规范
   ============================================ */

/* --------------------------
   基础重置
-------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', '思源黑体', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------
   CSS变量定义
-------------------------- */
:root {
  /* 主色调 */
  --color-primary: #2A3547;
  --color-secondary: #4A5A6F;
  --color-accent: #8696A9;
  --color-accent-hover: #6B7A8C;
  
  /* 背景色 */
  --color-bg: #F7F8FA;
  --color-card: rgba(255, 255, 255, 0.88);
  --color-card-hover: rgba(255, 255, 255, 0.95);
  
  /* 文字色 */
  --color-text: #1A202C;
  --color-text-secondary: #718096;
  --color-text-muted: #A0AEC0;
  
  /* 边框色 */
  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;
  
  /* 状态色 */
  --color-success: #48BB78;
  --color-warning: #ED8936;
  --color-error: #F56565;
  --color-info: #4299E1;
  
  /* 间距系统 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;
  
  /* 圆角系统 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-xl: 12px;
  --radius-full: 9999px;
  
  /* 字体大小 */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;
  
  /* 阴影系统 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  
  /* 过渡 */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------
   深色模式
-------------------------- */
[data-theme="dark"] {
  --color-primary: #8696A9;
  --color-secondary: #A0AEC0;
  --color-accent: #6B7A8C;
  --color-accent-hover: #8696A9;
  
  --color-bg: #1A1F2E;
  --color-card: rgba(30, 35, 48, 0.88);
  --color-card-hover: rgba(40, 45, 60, 0.95);
  
  --color-text: #F7F8FA;
  --color-text-secondary: #A0AEC0;
  --color-text-muted: #718096;
  
  --color-border: #2D3748;
  --color-border-light: #3D4858;
}

/* --------------------------
   工具类
-------------------------- */

/* 布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(-1 * var(--spacing-sm));
}

.col {
  flex: 1;
  padding: 0 var(--spacing-sm);
}

.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.666%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-5 { flex: 0 0 41.666%; }
.col-6 { flex: 0 0 50%; }
.col-7 { flex: 0 0 58.333%; }
.col-8 { flex: 0 0 66.666%; }
.col-9 { flex: 0 0 75%; }
.col-10 { flex: 0 0 83.333%; }
.col-11 { flex: 0 0 91.666%; }
.col-12 { flex: 0 0 100%; }

/* 间距 */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

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

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* 文本 */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.font-xs { font-size: var(--font-size-xs); }
.font-sm { font-size: var(--font-size-sm); }
.font-base { font-size: var(--font-size-base); }
.font-lg { font-size: var(--font-size-lg); }
.font-xl { font-size: var(--font-size-xl); }
.font-2xl { font-size: var(--font-size-2xl); }
.font-3xl { font-size: var(--font-size-3xl); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.uppercase { text-transform: uppercase; }
.capitalize { text-transform: capitalize; }
.underline { text-decoration: underline; }

/* 圆角 */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* 阴影 */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* 透明度 */
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* 光标 */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

/* 显示 */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* 位置 */
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

.top-0 { top: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }

/* 溢出 */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* --------------------------
   组件样式
-------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-sm {
  height: 32px;
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-md {
  height: 40px;
  padding: 0 var(--spacing-lg);
  font-size: var(--font-size-base);
}

.btn-lg {
  height: 48px;
  padding: 0 var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* 输入框 */
.input-group {
  position: relative;
  margin-bottom: var(--spacing-md);
}

.input-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.input-field {
  width: 100%;
  height: 48px;
  padding: 0 var(--spacing-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
  backdrop-filter: blur(8px);
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(42, 53, 71, 0.1);
}

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

/* 卡片 */
.card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.card-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.card-body {
  padding: var(--spacing-md);
}

.card-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: rgba(42, 53, 71, 0.1);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(72, 187, 120, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(237, 137, 54, 0.1);
  color: var(--color-warning);
}

.badge-error {
  background: rgba(245, 101, 101, 0.1);
  color: var(--color-error);
}

/* 进度条 */
.progress-bar {
  height: 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* --------------------------
   导航栏
-------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: rgba(26, 31, 46, 0.85);
  border-bottom-color: var(--color-border);
}

.navbar.scrolled {
  padding: var(--spacing-xs) var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-brand img {
  height: 40px;
  width: auto;
}

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

.navbar-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
}

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

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

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(6px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-6px);
}

/* 下拉菜单 */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  min-width: 200px;
  padding: var(--spacing-xs);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
}

.dropdown:hover .dropdown-menu,
.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-bg);
}

/* --------------------------
   全屏轮播
-------------------------- */
.carousel {
  position: relative;
  width: 100%;
  height: 800px;
  overflow: hidden;
}

.carousel-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.carousel-item.active {
  opacity: 1;
}

.carousel-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1) 0%,
    rgba(0, 0, 0, 0.3) 100%
  );
}

.carousel-content {
  position: absolute;
  bottom: 120px;
  left: 10%;
  right: 10%;
  text-align: center;
}

.carousel-title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.carousel-subtitle {
  font-size: var(--font-size-lg);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

.carousel-btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.carousel-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.carousel-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-md);
}

.carousel-indicator {
  width: 12px;
  height: 12px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.carousel-indicator:hover {
  background: rgba(255, 255, 255, 0.6);
}

.carousel-indicator.active {
  width: 32px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.9);
}

.carousel-controls {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
}

.carousel-control {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.carousel-control:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

/* --------------------------
   产品卡片网格
-------------------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent);
}

.product-image {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
}

.product-content {
  padding: var(--spacing-md);
  text-align: center;
}

.product-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.product-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.product-price {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

/* --------------------------
   页脚
-------------------------- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-2xl) 0;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-md);
}

.footer-desc {
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

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

.footer-link {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #fff;
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--spacing-md);
}

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

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
}

.footer-terms {
  display: flex;
  gap: var(--spacing-md);
}

/* --------------------------
   后台管理面板
-------------------------- */
.admin-layout {
  display: flex;
  min-height: 100vh;
  background: var(--color-bg);
}

.admin-sidebar {
  width: 260px;
  background: var(--color-card);
  border-right: 1px solid var(--color-border);
  transition: width var(--transition-normal);
}

.admin-sidebar.collapsed {
  width: 64px;
}

.admin-sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.admin-sidebar-logo {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
}

.admin-sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-sidebar.collapsed .admin-sidebar-title {
  display: none;
}

.admin-sidebar-menu {
  padding: var(--spacing-sm);
}

.admin-sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.admin-sidebar-item:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.admin-sidebar-item.active {
  background: rgba(42, 53, 71, 0.1);
  color: var(--color-primary);
}

.admin-sidebar-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.admin-sidebar-item-text {
  white-space: nowrap;
  font-size: var(--font-size-sm);
}

.admin-sidebar.collapsed .admin-sidebar-item-text {
  display: none;
}

.admin-sidebar-toggle {
  position: absolute;
  right: -12px;
  top: 20px;
  width: 24px;
  height: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.admin-sidebar-toggle:hover {
  background: var(--color-bg);
}

.admin-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.admin-header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.admin-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.admin-breadcrumb-item {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.admin-breadcrumb-item.active {
  color: var(--color-text);
}

.admin-breadcrumb-separator {
  color: var(--color-border);
}

.admin-header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.admin-search {
  position: relative;
}

.admin-search-input {
  width: 250px;
  height: 36px;
  padding: 0 var(--spacing-md) 0 36px;
  font-size: var(--font-size-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
}

.admin-search-input:focus {
  border-color: var(--color-primary);
}

.admin-search-icon {
  position: absolute;
  left: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
}

.admin-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.admin-user:hover {
  background: var(--color-bg);
}

.admin-user-avatar {
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
}

.admin-user-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.admin-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
}

.admin-page-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  background: rgba(42, 53, 71, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* 数据表格 */
.data-table {
  width: 100%;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.data-table-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.data-table-row {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
}

.data-table-row:hover {
  background: var(--color-bg);
}

.data-table-row.header {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.data-table-row:last-child {
  border-bottom: none;
}

.data-table-cell {
  flex: 1;
  padding: 0 var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.data-table-cell.center {
  text-align: center;
}

.data-table-cell.right {
  text-align: right;
}

.data-table-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.data-table-action {
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.data-table-action.edit {
  background: rgba(66, 153, 225, 0.1);
  color: var(--color-info);
}

.data-table-action.edit:hover {
  background: rgba(66, 153, 225, 0.2);
}

.data-table-action.delete {
  background: rgba(245, 101, 101, 0.1);
  color: var(--color-error);
}

.data-table-action.delete:hover {
  background: rgba(245, 101, 101, 0.2);
}

/* --------------------------
   响应式设计
-------------------------- */

/* 平板端 */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .navbar-menu {
    gap: var(--spacing-md);
  }
  
  .carousel-title {
    font-size: var(--font-size-2xl);
  }
  
  .cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
  }
}

/* 移动端 */
@media (max-width: 640px) {
  .navbar-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: var(--spacing-md);
    background: var(--color-card);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
  }
  
  .navbar-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .navbar-actions .btn {
    display: none;
  }
  
  .carousel {
    height: 400px;
  }
  
  .carousel-content {
    bottom: 60px;
    left: 5%;
    right: 5%;
  }
  
  .carousel-title {
    font-size: var(--font-size-xl);
  }
  
  .carousel-subtitle {
    font-size: var(--font-size-base);
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .admin-sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    height: 100%;
    z-index: 1001;
    transition: left var(--transition-normal);
  }
  
  .admin-sidebar.open {
    left: 0;
  }
  
  .admin-sidebar.collapsed.open {
    left: 0;
    width: 260px;
  }
  
  .admin-main {
    width: 100%;
  }
  
  .admin-search-input {
    width: 150px;
  }
  
  .admin-user-name {
    display: none;
  }
  
  .data-table-row {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .data-table-cell {
    width: 100%;
    padding: var(--spacing-xs) 0;
  }
  
  .data-table-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

/* 小屏幕手机 */
@media (max-width: 360px) {
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .carousel {
    height: 350px;
  }
  
  .carousel-content {
    bottom: 40px;
  }
  
  .carousel-title {
    font-size: var(--font-size-lg);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}