/* css/style.css */

/* --- 1. 基础变量与字体 --- */
:root {
  --link-blue: #2997ff; /* 更亮的 Apple Blue */
  --text-main: #1d1d1f;
  --text-sub: #86868b;
  --bg-gray: #f5f5f7;
  --card-bg: rgba(255, 255, 255, 0.65); /* 半透明背景 */
  --glass-border: rgba(255, 255, 255, 0.4);
}

body {
  background-color: #fbfbfd;
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* --- 2. 动态流体背景 (酷炫核心) --- */
body::before {
  content: "";
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
      circle at 50% 50%,
      rgba(0, 102, 204, 0.08),
      transparent 40%
    ),
    radial-gradient(circle at 80% 20%, rgba(255, 0, 150, 0.05), transparent 40%);
  animation: bg-move 20s ease-in-out infinite alternate;
  z-index: -1;
  pointer-events: none;
}

@keyframes bg-move {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  100% {
    transform: translate(-20px, -20px) rotate(5deg);
  }
}

/* --- 3. 首页 Bento Grid 卡片系统 --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  perspective: 1000px; /* 为 3D 效果做准备 */
}

.doc-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px); /* 核心：毛玻璃效果 */
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 36px;
  border: 1px solid rgba(0, 0, 0, 0.03);
  box-shadow: 0 4px 24px -1px rgba(0, 0, 0, 0.02);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  opacity: 0; /* 初始隐藏，给 JS 做进场动画 */
  transform: translateY(30px);
  animation: fade-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* 卡片悬停态：轻微上浮 + 阴影加深 + 边框高亮 */
.doc-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 102, 204, 0.1);
}

.doc-card:active {
  transform: scale(0.98);
}

.card-icon {
  font-size: 48px;
  margin-bottom: 20px;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.doc-card:hover .card-icon {
  transform: scale(1.1) rotate(5deg); /* 图标动态效果 */
}

.card-title {
  font-size: 24px;
  font-weight: 700;
  color: #1d1d1f;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 28px;
  flex-grow: 1;
}

.card-link {
  color: var(--link-blue);
  font-weight: 600;
  font-size: 16px;
  display: flex;
  align-items: center;
  opacity: 0.9;
}

/* 进场动画关键帧 */
@keyframes fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- 4. 详情页 Mac 终端风格代码块 --- */
pre {
  background: #1e1e20 !important;
  border-radius: 16px !important;
  padding: 3.5rem 1.5rem 1.5rem 1.5rem !important; /* 顶部留出红绿灯位置 */
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

/* 模拟 Mac 窗口红黄绿灯 */
pre::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f56;
  box-shadow: 20px 0 0 #ffbd2e, 40px 0 0 #27c93f;
}

/* 渐变文字特效类 */
.gradient-text {
  background: linear-gradient(135deg, #1d1d1f 0%, #434344 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.blue-gradient-text {
  background: linear-gradient(135deg, #0066cc 0%, #5ac8fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}