/* 资产管理系统 - 现代UI设计系统 */

/* ==================== 1. CSS变量系统 ==================== */
:root {
  /* 断点系统 - 基于rem单位，更好的缩放性 */
  --breakpoint-xs: 20rem;    /* 320px  - 超小屏幕 */
  --breakpoint-sm: 36rem;    /* 576px  - 小屏幕 */
  --breakpoint-md: 48rem;    /* 768px  - 中等屏幕 */
  --breakpoint-lg: 62rem;    /* 992px  - 大屏幕 */
  --breakpoint-xl: 75rem;    /* 1200px - 超大屏幕 */
  --breakpoint-xxl: 87.5rem; /* 1400px - 超超大屏幕 */

  /* 流体字体大小 - 使用clamp()避免固定尺寸 */
  --font-size-xs:   clamp(0.75rem, 0.5vw + 0.7rem, 0.875rem);
  --font-size-sm:   clamp(0.875rem, 0.5vw + 0.8rem, 1rem);
  --font-size-base: clamp(1rem, 0.5vw + 0.9rem, 1.125rem);
  --font-size-lg:   clamp(1.125rem, 1vw + 1rem, 1.25rem);
  --font-size-xl:   clamp(1.25rem, 1.5vw + 1rem, 1.5rem);
  --font-size-2xl:  clamp(1.5rem, 2vw + 1rem, 2rem);
  --font-size-3xl:  clamp(2rem, 3vw + 1rem, 2.5rem);

  /* 流体间距系统 */
  --space-xs:  clamp(0.25rem, 0.5vw, 0.5rem);
  --space-sm:  clamp(0.5rem, 1vw, 0.75rem);
  --space-md:  clamp(0.75rem, 2vw, 1rem);
  --space-lg:  clamp(1rem, 3vw, 1.5rem);
  --space-xl:  clamp(1.5rem, 4vw, 2rem);
  --space-2xl: clamp(2rem, 5vw, 3rem);
  --space-3xl: clamp(3rem, 8vw, 5rem);

  /* 动态边距 */
  --margin-section: clamp(2rem, 5vw, 4rem);
  --margin-component: clamp(1rem, 3vw, 2rem);

  /* 颜色系统 - 使用HSL便于主题切换 */
  --color-primary-h: 200;
  --color-primary-s: 100%;
  --color-primary-l: 60%;
  
  --color-primary: hsl(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l));
  --color-primary-light: hsl(var(--color-primary-h), var(--color-primary-s), calc(var(--color-primary-l) + 10%));
  --color-primary-dark: hsl(var(--color-primary-h), var(--color-primary-s), calc(var(--color-primary-l) - 10%));
  
  /* 暗色主题 */
  --color-background: hsl(220, 15%, 8%);
  --color-surface: hsl(220, 15%, 12%);
  --color-text-primary: hsl(220, 15%, 95%);
  --color-text-secondary: hsl(220, 15%, 75%);
  
  /* 状态色 */
  --color-success: hsl(142, 76%, 36%);
  --color-warning: hsl(38, 92%, 50%);
  --color-error: hsl(0, 84%, 60%);
  --color-info: hsl(217, 91%, 60%);

  /* 过渡时间 */
  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
  --transition-slow: 350ms ease-out;

  /* 阴影系统 */
  --shadow-sm: 0 1px 2px hsla(0, 0%, 0%, 0.05);
  --shadow-md: 0 4px 6px hsla(0, 0%, 0%, 0.07), 0 2px 4px hsla(0, 0%, 0%, 0.06);
  --shadow-lg: 0 10px 15px hsla(0, 0%, 0%, 0.1), 0 4px 6px hsla(0, 0%, 0%, 0.05);
  --shadow-xl: 0 20px 25px hsla(0, 0%, 0%, 0.1), 0 8px 10px hsla(0, 0%, 0%, 0.04);

  /* 加密行业人士资产管理系统 - 设计系统 */
  --cds-layout-size-height-sm: 2rem;
  --cds-layout-size-height-md: 2.5rem;
  --cds-layout-size-height-lg: 3rem;
  
  --cds-spacing-02: 0.25rem;
  --cds-spacing-03: 0.5rem;
  --cds-spacing-04: 0.75rem;
  --cds-spacing-05: 1rem;
  --cds-spacing-06: 1.5rem;
  --cds-spacing-07: 2rem;
  --cds-spacing-08: 2.5rem;
  
  --primary-color: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary-color: #8b5cf6;
  --success-color: #4ade80;
  --error-color: #f87171;
  --warning-color: #fbbf24;
  
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 浅色主题自适应 */
@media (prefers-color-scheme: light) {
  :root {
    --color-background: hsl(220, 15%, 98%);
    --color-surface: hsl(220, 15%, 95%);
    --color-text-primary: hsl(220, 15%, 10%);
    --color-text-secondary: hsl(220, 15%, 30%);
  }
}

/* ==================== 2. 基础重置和全局样式 ==================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: clamp(14px, 1.5vw, 18px); /* 根字体大小响应式 */
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-background);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  
  /* 优化文本渲染 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  
  /* 背景渐变 */
  background: linear-gradient(135deg, 
    hsl(220, 15%, 8%) 0%, 
    hsl(220, 15%, 10%) 60%, 
    hsl(220, 15%, 6%) 100%);
  background-attachment: fixed;
}

/* ==================== 3. 响应式布局系统 ==================== */
.container {
  display: grid;
  width: 100%;
  max-width: 87.5rem; /* 1400px */
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 2rem);
  
  /* 流体网格 - 12列系统 */
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
  
  /* 安全区域处理 */
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  padding-top: max(var(--space-lg), env(safe-area-inset-top));
  padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom));
}

/* 响应式列跨度 */
.col-1  { grid-column: span 1; }
.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-6  { grid-column: span 6; }
.col-8  { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* 小屏幕响应式 */
@media (max-width: 48rem) {
  .col-md-12 { grid-column: span 12; }
  .col-md-6  { grid-column: span 12; }
  .col-md-4  { grid-column: span 12; }
  
  .container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (min-width: 48rem) {
  .col-md-4  { grid-column: span 4; }
  .col-md-6  { grid-column: span 6; }
  .col-md-8  { grid-column: span 8; }
}

/* Flexbox系统 */
.flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(0.5rem, 2vw, 1rem);
}

.flex-item {
  flex: 1 1 auto;
  min-width: 0; /* 防止溢出 */
}

.flex-responsive {
  flex-direction: column;
}

@media (min-width: 48rem) {
  .flex-responsive {
    flex-direction: row;
  }
}

/* ==================== 4. 导航栏系统 ==================== */
.navbar-v2 {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  
  /* 内容驱动高度 */
  min-height: 3.5rem;
  height: auto;
  
  /* 玻璃态效果 */
  background: hsla(220, 15%, 8%, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  
  /* 边框 */
  border-bottom: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2);
  
  /* 响应式内边距 */
  padding: var(--space-sm) clamp(1rem, 5vw, 2rem);
  
  /* Flexbox布局 */
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  
  /* 性能优化 */
  transform: translateZ(0);
  will-change: transform;
}

/* 导航栏响应式处理 */
@media (max-width: 48rem) {
  .navbar-v2 {
    flex-direction: column;
    padding: var(--space-sm);
  }
  
  .navbar-v2 .nav-center,
  .navbar-v2 .nav-right {
    width: 100%;
    justify-content: center;
  }
}

/* 导航栏用户区域 */
.nav-center {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
}

#user-avatar {
  width: clamp(1.75rem, 4vw, 2rem);
  height: clamp(1.75rem, 4vw, 2rem);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  border: 2px solid hsla(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
}

#user-avatar:hover {
  transform: scale(1.05);
  box-shadow: 0 0 8px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4);
}

#username {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: var(--font-size-base);
}

/* 导航栏Logo区域 */
.nav-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  filter: drop-shadow(0 0 6px var(--color-primary));
}

.logo-text {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* 导航栏右侧按钮区域 */
.nav-right {
  display: flex;
  align-items: center;
}

/* ==================== 5. 卡片组件系统 ==================== */
.glass-card {
  /* 容器查询支持 */
  container-type: inline-size;
  
  /* 内容驱动的尺寸 */
  width: 100%;
  height: auto;
  min-height: min-content;
  
  /* 流体内边距 */
  padding: clamp(1rem, 4vw, 2rem);
  margin-bottom: var(--margin-component);
  
  /* 玻璃态背景 */
  background: hsla(220, 15%, 12%, 0.6);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  
  /* 动态边框 */
  border: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2);
  border-top: 2px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.6);
  border-radius: clamp(0.5rem, 2vw, 1.5rem);
  
  /* 响应式阴影 */
  box-shadow: 
    0 4px 16px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1),
    0 1px 4px hsla(0, 0%, 0%, 0.1);
  
  /* 过渡效果 */
  transition: all var(--transition-normal);
  
  /* 性能优化 */
  transform: translateZ(0);
  will-change: transform;
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 8px 32px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2),
    0 2px 8px hsla(0, 0%, 0%, 0.1);
}

/* 容器查询 - 基于卡片宽度调整布局 */
@container (max-width: 300px) {
  .glass-card {
    padding: var(--space-md);
    border-radius: var(--space-sm);
  }
  
  .card-content {
    flex-direction: column;
  }
}

@container (min-width: 500px) {
  .glass-card {
    padding: var(--space-xl);
  }
  
  .card-content {
    flex-direction: row;
    gap: var(--space-lg);
  }
}

/* 卡片标题 */
.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  
  /* 改进的可读性设计 */
  color: var(--color-text-primary);
  position: relative;
  
  /* 图标装饰 */
  .card-title-icon {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    filter: drop-shadow(0 0 8px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4));
  }
}

/* 增强的标题样式 - 带背景的版本 */
.card-title-enhanced {
  background: linear-gradient(90deg, 
    hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.15) 0%, 
    hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.05) 100%);
  padding: var(--space-sm) var(--space-md);
  border-radius: clamp(0.375rem, 1vw, 0.5rem);
  border-left: 3px solid var(--color-primary);
  box-shadow: 0 2px 8px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  margin-bottom: var(--space-lg);
}

/* 模块标题内的图标 */
.card-title i {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  filter: drop-shadow(0 0 6px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4));
  margin-right: var(--space-xs);
}

/* ==================== 6. 按钮系统 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  
  /* 内容自适应尺寸 */
  padding: clamp(0.5rem, 1.5vw, 0.75rem) clamp(1rem, 3vw, 2rem);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  
  /* 可访问性 - 最小点击区域 */
  min-height: 44px;
  min-width: 44px;
  
  /* 边框和圆角 */
  border: none;
  border-radius: clamp(0.5rem, 1vw, 0.75rem);
  
  /* 过渡效果 */
  transition: all var(--transition-normal);
  cursor: pointer;
  
  /* 性能优化 */
  transform: translateZ(0);
  will-change: transform;
  
  /* 防止选中 */
  user-select: none;
}

/* 按钮尺寸系统 - 参考Carbon Design System */
.btn-sm {
  min-height: 32px;
  padding: clamp(0.375rem, 1vw, 0.5rem) clamp(0.75rem, 2vw, 1rem);
  font-size: var(--font-size-sm);
}

.btn-md {
  min-height: 40px;
  padding: clamp(0.5rem, 1.25vw, 0.625rem) clamp(0.875rem, 2.5vw, 1.5rem);
  font-size: var(--font-size-base);
}

.btn-lg {
  min-height: 48px;
  padding: clamp(0.625rem, 1.75vw, 0.875rem) clamp(1.25rem, 3.5vw, 2.25rem);
  font-size: var(--font-size-lg);
}

/* 主要按钮 */
.btn-primary {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  box-shadow: 0 4px 16px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.3);
}

.btn-primary:hover {
  background: linear-gradient(90deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 6px 20px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4);
}

.btn-primary:active {
  transform: translateY(0) scale(1);
  transition: all var(--transition-fast);
}

/* 次要按钮 */
.btn-secondary {
  background: hsla(220, 15%, 15%, 0.3);
  color: var(--color-text-primary);
  border: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.3);
  box-shadow: 0 2px 8px hsla(0, 0%, 0%, 0.1);
}

.btn-secondary:hover {
  background: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  border-color: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.5);
  transform: translateY(-1px);
}

/* 第三级按钮 - 适合注销等非主要操作 */
.btn-tertiary {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid hsla(var(--color-text-secondary), 0.3);
  font-size: var(--font-size-sm);
  min-height: 36px;
  padding: clamp(0.25rem, 1vw, 0.5rem) clamp(0.75rem, 2vw, 1.25rem);
}

.btn-tertiary:hover {
  background: hsla(var(--color-text-secondary), 0.1);
  color: var(--color-text-primary);
  border-color: hsla(var(--color-text-secondary), 0.5);
  transform: translateY(-1px);
}

/* Ghost按钮 - 最低调的样式 */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  font-size: var(--font-size-sm);
  min-height: 32px;
  padding: clamp(0.25rem, 1vw, 0.375rem) clamp(0.5rem, 1.5vw, 1rem);
}

.btn-ghost:hover {
  background: hsla(var(--color-text-secondary), 0.08);
  color: var(--color-text-primary);
  transform: translateY(-0.5px);
}

/* 危险操作按钮 - 用于真正需要警示的操作 */
.btn-danger {
  background: linear-gradient(90deg, var(--color-error) 0%, hsl(0, 84%, 65%) 100%);
  color: white;
  box-shadow: 0 4px 16px hsla(0, 84%, 60%, 0.3);
}

.btn-danger:hover {
  background: linear-gradient(90deg, hsl(0, 84%, 65%) 0%, var(--color-error) 100%);
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 6px 20px hsla(0, 84%, 60%, 0.4);
}

/* 弹性按钮容器 - 解决快速操作按钮宽度问题 */
.btn-group {
  display: flex;
  gap: var(--space-md);
  width: 100%;
}

.btn-group .btn {
  flex: 1;
  min-width: 0;
}

.btn-group-responsive {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
}

@media (min-width: 48rem) {
  .btn-group-responsive {
    flex-direction: row;
    gap: var(--space-md);
  }
}

.btn-group-responsive .btn {
  flex: 1;
  min-width: 0;
  text-align: center;
}

/* ==================== 7. 数据展示组件 ==================== */
/* 汇率显示区域 */
.exchange-rates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-md);
  
  /* 内容驱动高度 */
  height: auto;
  min-height: min-content;
  padding: var(--space-lg);
}

.rate-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  
  /* 减小高度 */
  min-height: 36px;
  
  /* 减小内边距 */
  padding: var(--space-xs) var(--space-sm);
  
  background: hsla(220, 15%, 15%, 0.3);
  border-radius: var(--space-sm);
  border: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  
  /* 过渡效果 */
  transition: all var(--transition-normal);
  
  /* 缩小字体 */
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: var(--font-size-xs);
  text-align: center;
}

.rate-item:hover {
  background: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  /* 移除transform避免悬浮问题 */
}

/* 资产快照区域 */
.asset-snapshot {
  display: grid;
  gap: var(--space-lg);
  height: auto;
  
  /* 响应式网格 */
  grid-template-rows: auto 1fr;
}

.asset-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--space-md);
}

.asset-item {
  text-align: center;
  padding: var(--space-md);
  border-radius: var(--space-sm);
  background: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  border: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2);
  transition: all var(--transition-normal);
}

.asset-item:hover {
  background: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.15);
  transform: translateY(-1px);
}

.asset-value {
  font-size: var(--font-size-2xl);
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.asset-change {
  font-size: var(--font-size-sm);
  margin-left: var(--space-xs);
}

.asset-change.up { 
  color: var(--color-success); 
}

.asset-change.down { 
  color: var(--color-error); 
}

/* ==================== 8. 系统标题处理 ==================== */
.system-title {
  /* 移除固定定位，避免重叠 */
  display: none; /* 使用背景水印代替 */
}

/* 背景水印样式 */
#backgroundWatermark {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-15deg);
  font-size: clamp(2rem, 8vw, 4rem);
  font-weight: 900;
  color: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.08);
  pointer-events: none;
  z-index: 1;
  user-select: none;
  white-space: nowrap;
  letter-spacing: 0.1em;
  text-shadow: 0 0 20px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
}

/* ==================== 9. 页面布局调整 ==================== */
.dashboard-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  max-width: 100%;
  margin: 0 auto;
  padding-top: calc(3.5rem + var(--space-lg)); /* 导航栏高度 + 间距 */
}

@media (max-width: 62rem) {
  .dashboard-row {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.dashboard-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

/* ==================== 10. 工具类 ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }

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

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

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.m-0 { margin: 0; }
.mb-lg { margin-bottom: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }

.p-0 { padding: 0; }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }

/* ==================== 11. 可访问性 ==================== */
/* 焦点指示器 */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* 跳过链接 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 1001;
  border-radius: 4px;
}

.skip-link:focus {
  top: 6px;
}

/* 屏幕阅读器 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==================== 12. 动画偏好 ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==================== 13. 打印样式 ==================== */
@media print {
  .navbar-v2,
  .btn,
  #particles-bg,
  #backgroundWatermark {
    display: none !important;
  }
  
  .glass-card {
    background: white !important;
    color: black !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
  }
}

/* ==================== 高级按钮系统 - 2024年流行趋势 ==================== */

/* 玻璃态按钮 - Glassmorphism */
.btn-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.btn-glass:hover::before {
  left: 100%;
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* 新拟物风格按钮 - Neumorphism Enhanced */
.btn-neomorphic {
  background: linear-gradient(145deg, 
    hsla(220, 15%, 18%, 1), 
    hsla(220, 15%, 12%, 1));
  border: none;
  box-shadow: 
    8px 8px 16px hsla(220, 15%, 6%, 0.8),
    -8px -8px 16px hsla(220, 15%, 20%, 0.3),
    inset 2px 2px 4px hsla(220, 15%, 20%, 0.2);
  transition: all var(--transition-normal);
  position: relative;
}

.btn-neomorphic:hover {
  box-shadow: 
    4px 4px 8px hsla(220, 15%, 6%, 0.6),
    -4px -4px 8px hsla(220, 15%, 20%, 0.2),
    inset 4px 4px 8px hsla(220, 15%, 8%, 0.3);
  transform: translateY(2px);
}

.btn-neomorphic:active {
  box-shadow: 
    inset 8px 8px 16px hsla(220, 15%, 6%, 0.8),
    inset -8px -8px 16px hsla(220, 15%, 20%, 0.3);
  transform: translateY(3px);
}

/* 高级渐变按钮 - Premium Gradient */
.btn-premium {
  background: linear-gradient(135deg, 
    hsl(200, 100%, 60%) 0%,
    hsl(200, 100%, 70%) 25%,
    hsl(220, 100%, 65%) 50%,
    hsl(240, 100%, 70%) 75%,
    hsl(260, 100%, 65%) 100%);
  background-size: 200% 200%;
  border: none;
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 4px 15px hsla(200, 100%, 60%, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
  animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-premium::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.1) 0%,
    transparent 50%,
    rgba(255, 255, 255, 0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.btn-premium:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 
    0 8px 25px hsla(200, 100%, 60%, 0.6),
    0 4px 10px hsla(200, 100%, 60%, 0.3);
  animation-duration: 1.5s;
}

.btn-premium:hover::before {
  opacity: 1;
}

/* 霓虹发光按钮 - Neon Glow */
.btn-neon {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  text-shadow: 0 0 10px var(--color-primary);
  box-shadow: 
    0 0 10px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.5),
    inset 0 0 10px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
}

.btn-neon::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4), 
    transparent);
  transition: left 0.5s ease;
}

.btn-neon:hover {
  background: hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.1);
  color: white;
  text-shadow: 0 0 20px var(--color-primary);
  border-color: var(--color-primary-light);
  box-shadow: 
    0 0 20px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.8),
    0 0 40px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.6),
    inset 0 0 20px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2);
  transform: translateY(-2px) scale(1.02);
}

.btn-neon:hover::before {
  left: 100%;
}

/* 3D立体按钮 - 3D Effect */
.btn-3d {
  background: linear-gradient(145deg, var(--color-primary-light), var(--color-primary));
  border: none;
  position: relative;
  transform-style: preserve-3d;
  transition: all var(--transition-normal);
  box-shadow: 
    0 6px 0 var(--color-primary-dark),
    0 8px 12px rgba(0, 0, 0, 0.3);
}

.btn-3d:hover {
  transform: translateY(-2px) rotateX(10deg);
  box-shadow: 
    0 8px 0 var(--color-primary-dark),
    0 12px 20px rgba(0, 0, 0, 0.4);
}

.btn-3d:active {
  transform: translateY(3px);
  box-shadow: 
    0 3px 0 var(--color-primary-dark),
    0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 磁吸效果按钮 - Magnetic Effect */
.btn-magnetic {
  background: linear-gradient(45deg, var(--color-primary), var(--color-primary-light));
  border: none;
  position: relative;
  transition: all var(--transition-normal);
  cursor: none;
}

.btn-magnetic::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  transition: transform var(--transition-fast);
  pointer-events: none;
  mix-blend-mode: difference;
}

.btn-magnetic:hover::after {
  transform: translate(-50%, -50%) scale(1);
}

/* 液体效果按钮 - Liquid Effect */
.btn-liquid {
  background: var(--color-primary);
  border: none;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.btn-liquid::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.6s ease;
  opacity: 0;
}

.btn-liquid:hover::before {
  width: 300px;
  height: 300px;
  opacity: 1;
}

.btn-liquid:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.4);
}

/* 快速操作按钮的高级样式应用 */
.quick-action-enhanced .btn {
  /* 默认使用玻璃态效果 */
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: white;
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.quick-action-enhanced .btn::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, 
    var(--color-primary),
    var(--color-primary-light),
    hsl(220, 100%, 65%),
    hsl(260, 100%, 65%));
  background-size: 300% 300%;
  border-radius: inherit;
  z-index: -1;
  animation: gradient-border 3s ease infinite;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

@keyframes gradient-border {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.quick-action-enhanced .btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 4px 12px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.3);
}

.quick-action-enhanced .btn:hover::before {
  opacity: 1;
}

/* 微交互动画增强 */
.btn-interactive {
  position: relative;
  overflow: hidden;
}

.btn-interactive::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn-interactive:active::after {
  width: 300px;
  height: 300px;
  transition: width 0s, height 0s;
}

/* 高级按钮内容布局 */
.quick-action-enhanced .btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: clamp(1rem, 3vw, 1.5rem);
  min-height: clamp(80px, 15vw, 100px);
  font-weight: 600;
  text-align: center;
  border-radius: clamp(0.75rem, 2vw, 1rem);
}

.quick-action-enhanced .btn i {
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--color-primary-light);
  filter: drop-shadow(0 0 8px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.6));
  transition: all var(--transition-normal);
}

.quick-action-enhanced .btn span {
  font-size: clamp(0.875rem, 2.5vw, 1rem);
  color: white;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-normal);
}

.quick-action-enhanced .btn:hover i {
  color: white;
  filter: drop-shadow(0 0 12px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.8));
  transform: scale(1.1);
}

.quick-action-enhanced .btn:hover span {
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
  transform: translateY(-1px);
}

/* 额外的高级按钮变体 */
.btn-holographic {
  background: linear-gradient(45deg, 
    hsl(300, 100%, 70%), 
    hsl(200, 100%, 70%), 
    hsl(120, 100%, 70%), 
    hsl(60, 100%, 70%));
  background-size: 400% 400%;
  animation: holographic 4s ease infinite;
  border: none;
  position: relative;
  overflow: hidden;
}

@keyframes holographic {
  0%, 100% { background-position: 0% 50%; }
  25% { background-position: 100% 0%; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0% 100%; }
}

.btn-holographic::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.btn-holographic:hover::before {
  background: rgba(255, 255, 255, 0.2);
}