/* 基础变量定义 - 苹果浅色风格 (v7 优化) */
:root {
  /* 优化：使用苹果色板 */
  --primary: #0071e3; /* Apple Blue */
  --primary-dark: #0077ed;
  --secondary: #34c759; /* Apple Green */
  --warning: #f59e0b; /* Apple Orange/Warning */
  --danger: #ef4444;  /* Apple Red/Error */
  
  /* 优化：使用苹果浅色模式色板 */
  --page-bg: #f9f9fb;   /* 页面背景 (极浅灰) */
  --card-bg-solid: #ffffff; /* 卡片纯白背景 */
  --card-bg-glass: rgba(255, 255, 255, 0.75); /* 玻璃背景 */
  
  --text-primary: #1d1d1f; /* 主要文本 (近黑) */
  --text-secondary: #86868b; /* 次要文本 (灰色) */
  --border-color: rgba(0, 0, 0, 0.1); /* 边框颜色 */
  
  /* 优化：使用更柔和的阴影 */
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px; /* 苹果风格的圆角 */
  --radius-full: 9999px;
  
  --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-subtle: all 0.3s ease-in-out;
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "system-ui", sans-serif;
}

/* 优化：自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.03);
}
::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover {
  background-color: rgba(0, 0, 0, 0.4);
}

body {
  background-color: var(--page-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  /* 优化：保留微妙的彩色光晕，为玻璃效果提供背景 */
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 113, 227, 0.1), transparent),
    radial-gradient(ellipse 80% 50% at 50% 120%, rgba(52, 199, 89, 0.05), transparent);
  background-attachment: fixed;
  overflow-x: hidden; 
  
  opacity: 0;
  animation: fadeIn 0.8s 0.2s ease-out forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

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

/* 容器样式 */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部样式 - 浅色风格 */
header {
  padding: 6rem 0 4rem; 
  text-align: center; 
  position: relative;
  overflow: hidden;
}

.header-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem; 
  margin-bottom: 1.5rem; 
  opacity: 0;
  transform: translateY(20px);
  animation: slideUpFade 0.7s 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.header-logo svg {
  width: 52px; 
  height: 52px;
  color: var(--primary);
  transition: var(--transition-normal);
}

.header-logo:hover svg {
  transform: scale(1.1) rotate(-5deg); 
}

.header-title {
  font-size: 3.5rem; 
  font-weight: 600; 
  /* 优化：浅色模式下的文本渐变 */
  background: linear-gradient(90deg, #1d1d1f 60%, #545457);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0;
  letter-spacing: -1px;
  line-height: 1.1;
  opacity: 0;
  transform: translateY(20px);
  animation: slideUpFade 0.7s 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.header-subtitle {
  font-size: 1.25rem; 
  color: var(--text-secondary);
  max-width: 600px;
  margin: 1.5rem auto 0;
  line-height: 1.7;
  opacity: 0;
  transform: translateY(20px);
  animation: slideUpFade 0.7s 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 主内容区 */
.main-content {
  padding: 1rem 0 6rem;
}

/* 产品网格布局 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2.5rem;
  margin-top: 2.5rem;
}

/* 产品卡片样式 - 核心优化 v5 (浅色玻璃拟态) */
.product-card {
  background-color: var(--card-bg-glass);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border-color); 
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  
  /* 滚动动画的初始状态 (由 index.ejs 中的 JS 控制) */
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow), box-shadow var(--transition-fast), border-color var(--transition-fast);
  transition-delay: 0ms; 
}

/* 滚动动画的结束状态 (由JS添加 .is-visible) */
.product-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.product-card:before { display: none; }
.product-card::after { display: none; }

/* 优化：浅色悬停效果 */
.product-card:hover {
  transform: scale(1.02); /* 优化：更微妙的缩放 */
  border-color: rgba(0, 0, 0, 0.15);
  box-shadow: var(--shadow-lg);
}

.product-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.product-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  /* 优化：浅色底色 */
  background-color: rgba(0, 0, 0, 0.05); 
  border-radius: var(--radius-md);
  color: var(--theme-color, var(--primary));
  transition: var(--transition-normal);
}

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

.product-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  color: var(--text-primary);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.8rem 0 1.2rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.3rem 0.9rem;
  background-color: rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.product-card:hover .tag {
  background-color: rgba(0, 0, 0, 0.08);
}

.product-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.product-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.8rem;
  font-size: 0.85rem;
  color: var(--text-primary); /* 优化：元信息使用主色 */
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.meta-item svg {
  width: 15px;
  height: 15px;
  color: var(--theme-color, var(--primary));
}

.product-version {
  background-color: rgba(0, 0, 0, 0.03); /* 优化：更浅的背景 */
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.8rem;
  display: inline-block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--theme-color, var(--primary));
}

.version-label {
  font-weight: 600;
  color: var(--theme-color, var(--primary));
}

/* 按钮样式 - 浅色风格 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-full); /* 苹果胶囊按钮 */
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  text-decoration: none;
  outline: none;
  transform: scale(1);
}

.btn-primary {
  background-color: var(--theme-color, var(--primary));
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: scale(1.03);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1); 
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: none;
}

/* 优化：浅色次要按钮 */
.btn-secondary {
  background-color: rgba(0, 0, 0, 0.08);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.12);
  transform: scale(1.03);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.btn-secondary:active {
  transform: scale(0.98);
  box-shadow: none;
}

/* 按钮组 */
.button-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* 消息框 */
.message-box {
  background-color: var(--card-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  border: 1px solid var(--border-color);
  max-width: 800px;
  margin: 3rem auto;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.message-box p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: 0;
  line-height: 1.7;
}

/* 模态框样式 - 优化 (浅色玻璃拟态) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 优化：浅色遮罩层 + 高斯模糊 */
  background-color: rgba(249, 249, 251, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
}

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

/* 优化 v6：解决“粗高”问题 */
.modal-container {
  background-color: rgba(252, 252, 253, 0.85); /* 玻璃背景 */
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px; /* 优化：从 600px 减小到 500px */
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(30px) scale(0.95);
  opacity: 0;
  transition: var(--transition-normal);
  border: 1px solid var(--border-color);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.modal-header {
  padding: 1.25rem; /* 优化：从 1.5rem 减小 */
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.15rem; /* 优化：减小标题字号 */
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-normal);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
  background-color: rgba(0, 0, 0, 0.05);
  transform: rotate(90deg);
}

.modal-body {
  /* 优化：移除顶部 padding，让列表紧贴 header 分隔线 */
  padding: 0.5rem 0 1rem; 
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.history-item {
  padding: 0.9rem 1.25rem; /* 优化：减小垂直 padding */
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

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

.history-item:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.history-item-info {
  display: flex;
  flex-direction: column;
}

.version-tag {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem; /* 优化：减小字号 */
}

.version-details {
  font-size: 0.8rem; /* 优化：减小字号 */
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* 优化：列表中的下载按钮也缩小 */
.history-item .btn-secondary {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}


/* 页脚样式 */
footer {
  background-color: transparent; 
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 5rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.6;
}

/* 错误页面样式 (浅色) */
.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
}

/* --- 优化 v7：修复“模糊”问题 --- */
.error-code {
  font-size: 8rem;
  font-weight: 800;
  margin: 0;
  line-height: 1;
  /* 移除: background, -webkit-background-clip, background-clip, color: transparent */
  
  /* 优化：使用更清晰的阴影 */
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.1); 
}

/* 优化：为 404 和 500 设置清晰的、高对比度的 solid 颜色 */
.error-404 {
  color: var(--warning); /* Apple Orange/Warning color */
}

.error-500 {
  color: var(--danger); /* Apple Red/Error color */
}
/* --- 结束 v7 优化 --- */


.error-title {
  font-size: 2rem;
  font-weight: 600;
  margin: 1.5rem 0;
  color: var(--text-primary);
}

.error-message {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.error-path {
  background-color: rgba(0, 0, 0, 0.03);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  font-family: monospace;
  font-size: 0.9rem;
  margin: 1rem 0;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  max-width: 90%;
  word-break: break-all;
}

.back-home-btn {
  background-color: var(--primary);
  color: white;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.back-home-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.back-home-btn:active {
  transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
  header {
    text-align: center; 
  }
  
  .header-content {
      margin: 0; 
  }

  .header-title {
    font-size: 2.5rem; 
  }
  .header-subtitle {
    font-size: 1.1rem;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .error-code {
    font-size: 6rem;
  }
  
  /* 优化：响应式下，模态框宽度适应 */
  .modal-container {
    max-width: 90vw;
  }
}

@media (max-width: 480px) {
  .header-logo {
    gap: 0.8rem;
  }
  
  .header-title {
    font-size: 2rem;
  }
  
  .header-subtitle {
    font-size: 1rem;
  }
  
  .product-card {
    padding: 1.5rem;
    /* 优化：移动端玻璃效果可能卡顿，可选择关闭 */
    /* backdrop-filter: none; */
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .error-code {
    font-size: 4.5rem;
  }
  
  .error-title {
    font-size: 1.5rem;
  }
}