/* 论坛主题样式 */
:root {
  --primary: #4F46E5;
  --secondary: #EC4899;
  --dark: #1F2937;
  --light: #F3F4F6;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --blue-100: #DBEAFE;
  --blue-600: #2563EB;
  --green-100: #DCFCE7;
  --green-600: #16A34A;
  --yellow-100: #FEF9C3;
  --yellow-600: #D97706;
  --purple-100: #F3E8FF;
  --purple-600: #9333EA;
  --red-100: #FEE2E2;
  --red-600: #DC2626;
}

/* 全局样式重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--gray-50);
  color: var(--dark);
  line-height: 1.6;
}

/* 自定义工具类 */
.card-hover {
  transition: all 0.3s ease;
}

.card-hover:hover {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transform: translateY(-5px);
}

.text-balance {
  text-wrap: balance;
}

/* Markdown 样式 */
.markdown-body {
  color: var(--gray-800);
  line-height: 1.8;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.markdown-body h1 {
  font-size: 2.25rem;
}

.markdown-body h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
  padding-bottom: 0.5rem;
  margin-top: 2rem;
}

.markdown-body h3 {
  font-size: 1.25rem;
}

.markdown-body p {
  margin-bottom: 1rem;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.markdown-body ul {
  list-style-type: disc;
}

.markdown-body ol {
  list-style-type: decimal;
}

.markdown-body li {
  margin-bottom: 0.5rem;
}

.markdown-body code {
  background-color: var(--gray-100);
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.markdown-body pre {
  background-color: var(--gray-900);
  color: var(--gray-300);
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.markdown-body pre code {
  background-color: transparent;
  padding: 0;
}

.markdown-body blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 1rem;
  font-style: italic;
  color: var(--gray-600);
  margin-bottom: 1rem;
}

.markdown-body img {
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  margin: 1rem 0;
  max-width: 100%;
  height: auto;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

/* 过渡动画 */
.transition-all {
  transition: all 0.3s ease;
}

.transition-colors {
  transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .markdown-body h1 {
    font-size: 1.75rem;
  }
  
  .markdown-body h2 {
    font-size: 1.25rem;
  }
  
  .markdown-body h3 {
    font-size: 1.125rem;
  }
}

/* 加载动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* 点赞动画 */
@keyframes heartBeat {
  0% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.3);
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.3);
  }
  70% {
    transform: scale(1);
  }
}

.heart-animation {
  animation: heartBeat 0.6s ease-in-out;
}

/* 高亮效果 */
.highlight {
  background-color: rgba(79, 70, 229, 0.1);
  border-radius: 0.25rem;
  padding: 0.125rem 0.25rem;
}

/* 徽章样式 */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.25;
}

/* 工具提示 */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: var(--dark);
  color: white;
  text-align: center;
  border-radius: 0.25rem;
  padding: 0.5rem;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -60px;
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 0.75rem;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/* 模态框背景 */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

/* 骨架屏加载 */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

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

/* 焦点样式 */
.focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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