/* ===== CSS 优化版本 v1.0 ===== */
/* 设计系统 + 响应式 + 性能优化 */

/* ===== 1. CSS变量 & 设计系统 ===== */
@import url("https://mp.bilkut.cn/ukijekran.css");
:root {
  /* 颜色系统 */
  --color-primary: #07C160;
  --color-primary-dark: #06a852;
  --color-primary-light: rgba(7, 193, 96, 0.1);
  --color-secondary: #1677FF;
  --color-secondary-dark: #0e66e0;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-info: #6b7280;
  
  /* 中性色 */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --color-black: #000000;
  
  /* 文本颜色 */
  --text-primary: var(--color-gray-800);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-500);
  --text-on-primary: var(--color-white);
  
  /* 背景颜色 */
  --bg-body: #f8fafc;
  --bg-card: var(--color-white);
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* 边框 */
  --border-color: var(--color-gray-200);
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-full: 9999px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  
  /* 间距系统 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  
  /* 字体系统 */
  --font-family-sans: 'UKIJEkran', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* 过渡动画 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* z-index 层级 */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
  --z-popover: 60;
  --z-tooltip: 70;
  --z-toast: 80;
  
  /* 容器宽度 */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* ===== 2. 重置与基础样式 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-body);
  background-image: 
    radial-gradient(at 40% 20%, rgba(7, 193, 96, 0.05) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(22, 119, 255, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(7, 193, 96, 0.05) 0px, transparent 50%),
    radial-gradient(at 80% 50%, rgba(22, 119, 255, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(7, 193, 96, 0.05) 0px, transparent 50%),
    radial-gradient(at 80% 100%, rgba(22, 119, 255, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 0%, rgba(7, 193, 96, 0.05) 0px, transparent 50%);
  min-height: 100vh;
  overflow-x: hidden;
}

/* 优化内容可见性 */
.content-auto {
  content-visibility: auto;
  contain-intrinsic-size: 0 500px;
}

/* ===== 3. 排版工具类 ===== */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

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

.leading-tight { line-height: var(--line-height-tight); }
.leading-normal { line-height: var(--line-height-normal); }
.leading-relaxed { line-height: var(--line-height-relaxed); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 4. 间距工具类 ===== */
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* ===== 5. 布局工具类 ===== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.flex-none { flex: none; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

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

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* ===== 6. 卡片组件 ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  transform: translateY(0);
  overflow: hidden;
}

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

.card-lg {
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
}

.card-shadow {
  box-shadow: var(--shadow-xl);
}

.card-content {
  padding: var(--space-6);
}

.card-header {
  padding: var(--space-6) var(--space-6) 0;
  margin-bottom: var(--space-4);
}

.card-footer {
  padding: 0 var(--space-6) var(--space-6);
  margin-top: var(--space-4);
}

/* ===== 7. 按钮组件 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-tight);
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition-normal);
  transform: translateY(0);
  user-select: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
  transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
  animation: ripple 1s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  100% {
    transform: scale(20, 20);
    opacity: 0;
  }
}

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

.btn-effect:active {
  transform: translateY(0);
  transition-duration: var(--transition-fast);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* 按钮变体 */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-on-primary);
  box-shadow: 0 2px 4px rgba(7, 193, 96, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(7, 193, 96, 0.3);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--text-on-primary);
  box-shadow: 0 2px 4px rgba(22, 119, 255, 0.25);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--text-on-primary);
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
  background-color: #dc2626;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

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

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

.btn-ghost:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-base);
}

.btn-block {
  width: 100%;
}

.btn-loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn-loading .btn-text {
  visibility: hidden;
}

.btn-loading::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-spinner 0.6s linear infinite;
}

@keyframes button-spinner {
  to {
    transform: rotate(360deg);
  }
}

/* ===== 8. 表单组件 ===== */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family-sans);
  transition: all var(--transition-normal);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(7, 193, 96, 0.15);
}

.form-input:hover:not(:focus),
.form-textarea:hover:not(:focus),
.form-select:hover:not(:focus) {
  border-color: var(--color-gray-300);
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.7;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.form-checkbox,
.form-radio {
  width: 1rem;
  height: 1rem;
  color: var(--color-primary);
  cursor: pointer;
}

.form-checkbox:checked,
.form-radio:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.form-error {
  border-color: var(--color-danger) !important;
}

.form-error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15) !important;
}

.error-message {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
}

/* ===== 9. 导航组件 ===== */
.nav-container {
  display: flex;
  gap: var(--space-1);
}

.nav-link {
  padding: 0.625rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.nav-link.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
}

.nav-link.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* ===== 10. 玻璃效果 ===== */
.glass-effect {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 8px 32px 0 rgba(31, 38, 135, 0.1),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.2);
}

.glass-effect-dark {
  background: rgba(31, 41, 55, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 8px 32px 0 rgba(0, 0, 0, 0.2),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
}

/* ===== 11. 加载动画 ===== */
.loader {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(7, 193, 96, 0.1);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spinner 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.loader-sm {
  width: 24px;
  height: 24px;
  border-width: 2px;
}

.loader-lg {
  width: 60px;
  height: 60px;
  border-width: 4px;
}

@keyframes spinner {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loader-dots {
  display: flex;
  gap: 4px;
}

.loader-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  animation: dot-pulse 1.4s ease-in-out infinite both;
}

.loader-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loader-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes dot-pulse {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== 12. 移动端菜单 ===== */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  position: relative;
  z-index: calc(var(--z-modal) + 10);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: var(--color-gray-100);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 5px auto;
  transition: all var(--transition-normal);
  border-radius: 1px;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--bg-card);
  z-index: var(--z-modal);
  transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
  padding: var(--space-6);
  overflow-y: auto;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
}

.mobile-menu-content.active {
  right: 0;
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu-nav .nav-link {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-1);
  border-radius: var(--border-radius-md);
}

.mobile-menu-footer {
  margin-top: auto;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
}

/* ===== 13. 模态框 ===== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-2xl);
  animation: modalFadeIn var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
}

.modal-sm {
  max-width: 400px;
}

.modal-md {
  max-width: 500px;
}

.modal-lg {
  max-width: 640px;
}

.modal-xl {
  max-width: 768px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) var(--space-6) 0;
  margin-bottom: var(--space-4);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--text-muted);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background-color: var(--color-gray-100);
  color: var(--text-primary);
}

.modal-body {
  padding: 0 var(--space-6);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-6);
  margin-top: var(--space-4);
  border-top: 1px solid var(--border-color);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ===== 14. Toast通知 ===== */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 400px;
  width: 100%;
}

.toast {
  background: var(--bg-card);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  animation: toastSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 4px solid var(--color-primary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.toast-success {
  border-left-color: var(--color-success);
}

.toast-error {
  border-left-color: var(--color-danger);
}

.toast-warning {
  border-left-color: var(--color-warning);
}

.toast-info {
  border-left-color: var(--color-info);
}

.toast-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

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

.toast-title {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.toast-message {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-tight);
}

.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: var(--space-1);
  cursor: pointer;
  color: var(--text-muted);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-close:hover {
  background-color: var(--color-gray-100);
  color: var(--text-primary);
}

.toast-exit {
  animation: toastSlideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ===== 15. 表格组件 ===== */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

.table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.table th {
  background-color: var(--color-gray-50);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.table tbody tr:hover {
  background-color: var(--color-gray-50);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table-striped tbody tr:nth-child(odd) {
  background-color: var(--color-gray-50);
}

/* ===== 16. 选项卡组件 ===== */
.tab-container {
  border-bottom: 2px solid var(--border-color);
  margin-bottom: var(--space-4);
}

.tab-list {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tab-list::-webkit-scrollbar {
  display: none;
}

.tab-item {
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  position: relative;
}

.tab-item:hover {
  color: var(--color-primary);
}

.tab-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  padding: var(--space-4) 0;
}

/* ===== 17. 折叠面板 ===== */
.accordion {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}

.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  width: 100%;
  padding: var(--space-4);
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  text-align: left;
}

.accordion-header:hover {
  background-color: var(--color-gray-50);
}

.accordion-title {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.accordion-icon {
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.accordion-icon.rotate-180 {
  transform: rotate(180deg);
}

.accordion-content {
  padding: 0 var(--space-4);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.accordion-content.active {
  padding: var(--space-4);
  max-height: 2000px;
}

/* ===== 18. 滚动条样式 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
  border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-400);
  border-radius: var(--border-radius-sm);
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-500);
  background-clip: content-box;
}

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

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-gray-400) var(--color-gray-100);
}

/* ===== 19. 选中和焦点状态 ===== */
::selection {
  background-color: rgba(7, 193, 96, 0.3);
  color: var(--text-primary);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

/* 移除默认焦点样式 */
:focus:not(:focus-visible) {
  outline: none;
}

/* ===== 20. 动画工具类 ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) ease-out;
}

.animate-fade-in-down {
  animation: fadeInDown var(--transition-slow) ease-out;
}

.animate-slide-in-right {
  animation: slideInRight var(--transition-normal) ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft var(--transition-normal) ease-out;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ===== 21. 响应式断点 ===== */

/* 超小屏幕 (手机竖屏) */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }
  
  .card-content {
    padding: var(--space-4);
  }
  
  .modal-content {
    margin: 0 var(--space-2);
  }
  
  .toast-container {
    left: var(--space-3);
    right: var(--space-3);
    max-width: none;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* 小屏幕 (手机横屏/小平板) */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .desktop-nav {
    display: none !important;
  }
  
  .brand-container h1 {
    font-size: var(--font-size-lg);
  }
  
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .modal-sm,
  .modal-md,
  .modal-lg,
  .modal-xl {
    max-width: 95vw;
  }
  
  .table {
    min-width: 0;
  }
  
  .hidden-sm {
    display: none;
  }
}

/* 中等屏幕 (平板/小桌面) */
@media (min-width: 769px) and (max-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
  
  .desktop-nav {
    display: flex !important;
  }
  
  .grid-cols-4 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .hidden-md {
    display: none;
  }
}

/* 大屏幕 (桌面) */
@media (min-width: 1025px) {
  .mobile-menu-btn {
    display: none;
  }
  
  .desktop-nav {
    display: flex !important;
  }
  
  .hidden-lg {
    display: none;
  }
}

/* 特大屏幕 */
@media (min-width: 1440px) {
  .container {
    max-width: var(--container-2xl);
  }
  
  .hidden-xl {
    display: none;
  }
}

/* ===== 22. 打印样式 ===== */
@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
    font-size: 12pt;
  }
  
  .card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    break-inside: avoid;
  }
  
  a {
    color: black !important;
    text-decoration: underline !important;
  }
  
  .btn {
    display: none !important;
  }
  
  .modal-backdrop,
  .toast-container {
    display: none !important;
  }
}

/* ===== 23. 无障碍支持 ===== */

/* 减少运动偏好 */
@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;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  .btn-primary {
    border: 2px solid var(--color-primary-dark);
  }
  
  .btn-secondary {
    border: 2px solid var(--color-secondary-dark);
  }
  
  .card {
    border: 2px solid var(--border-color);
  }
  
  .nav-link.active {
    border: 2px solid var(--color-primary);
  }
  
  .form-input:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 1px;
  }
}

/* 暗色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --text-primary: #4a4c4e;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --color-gray-50: #1e293b;
    --color-gray-100: #334155;
    --color-gray-200: #475569;
    --color-gray-300: #64748b;
    --color-gray-400: #94a3b8;
    --color-gray-500: #cbd5e1;
    --color-gray-600: #e2e8f0;
    --color-gray-700: #f1f5f9;
    --bg-overlay: rgba(0, 0, 0, 0.7);
  }
  
  .glass-effect {
    background: rgba(30, 41, 59, 0.9);
    border-color: rgba(255, 255, 255, 0.1);
  }
  
  .btn-ghost {
    border-color: var(--color-gray-300);
    color: var(--text-primary);
  }
  
  .btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .form-input,
  .form-textarea,
  .form-select {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-200);
    color: var(--text-primary);
    direction: ltr;
  }
  
  .form-input::placeholder {
    color: var(--color-gray-400);
  }
  
  ::-webkit-scrollbar-track {
    background: var(--color-gray-100);
  }
  
  ::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
  }
  
  * {
    scrollbar-color: var(--color-gray-300) var(--color-gray-100);
  }
}

/* ===== 24. RTL支持 ===== */
[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] .form-select {
  background-position: left 0.5rem center;
  padding-right: 1rem;
  padding-left: 2.5rem;
}

[dir="rtl"] .mobile-menu-content {
  right: auto;
  left: -100%;
}

[dir="rtl"] .mobile-menu-content.active {
  left: 0;
  right: auto;
}

[dir="rtl"] .toast-container {
  right: auto;
  left: var(--space-4);
}

[dir="rtl"] .nav-link.active::after {
  left: auto;
  right: 1rem;
}

/* ===== 25. 工具类扩展 ===== */
.border {
  border: 1px solid var(--border-color);
}

.border-t {
  border-top: 1px solid var(--border-color);
}

.border-b {
  border-bottom: 1px solid var(--border-color);
}

.rounded {
  border-radius: var(--border-radius-md);
}

.rounded-lg {
  border-radius: var(--border-radius-lg);
}

.rounded-full {
  border-radius: var(--border-radius-full);
}

.shadow {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.shadow-none {
  box-shadow: none;
}

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

.select-none { user-select: none; }
.select-text { user-select: text; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }

.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* ===== 26. 性能优化 ===== */
.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

.backface-hidden {
  backface-visibility: hidden;
}

.transform-gpu {
  transform: translateZ(0);
}

/* ===== 27. 空状态 ===== */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  color: var(--color-gray-300);
  margin-bottom: var(--space-4);
}

.empty-state-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  max-width: 400px;
  margin: 0 auto;
}

/* ===== 28. 骨架屏加载 ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-100) 25%,
    var(--color-gray-200) 37%,
    var(--color-gray-100) 63%
  );
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--border-radius-md);
}

.skeleton-circle {
  border-radius: var(--border-radius-full);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  margin-bottom: 0;
  width: 80%;
}

@keyframes skeleton-loading {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

/* ===== 29. 徽章 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-full);
  white-space: nowrap;
}

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

.badge-secondary {
  background-color: rgba(22, 119, 255, 0.1);
  color: var(--color-secondary);
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

/* ===== 30. 进度条 ===== */
.progress {
  width: 100%;
  height: 8px;
  background-color: var(--color-gray-200);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-normal) ease;
}

.progress-sm {
  height: 4px;
}

.progress-lg {
  height: 12px;
}