/* 全局样式设置 */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

/* 基本字体与背景 */
body {
  margin: 0;
  padding: 0;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #0E1E2D 70%, #45AFFF 25%, #FF9F0C 5%);
  color: #FFFFFF;
}

/* 固定导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(14, 30, 45, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  z-index: 1000;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
  font-size: 1.5em;
  font-weight: 700;
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

.navbar ul li {
  position: relative;
}

.navbar ul li a {
  text-decoration: none;
  color: #FFFFFF;
  font-weight: 400;
  transition: color 0.3s ease;
}

.navbar ul li a:hover {
  color: #FF9F0C;
}

.navbar ul li .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: 10px;
  padding: 10px 0;
  min-width: 150px;
}

.navbar ul li:hover .dropdown-menu {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  color: #FFFFFF;
}

.dropdown-menu a:hover {
  background: rgba(255, 159, 12, 0.2);
}

/* 主要内容区域样式 */
.main {
  padding: 120px 40px 40px 40px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 768px) {
  .main {
    grid-template-columns: 1fr 1fr;
  }
}

.section {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  min-width: 500px;
}

.section h2 {
  font-size: 1.8em;
  margin-bottom: 20px;
  color: #45AFFF;
}

.section p {
  font-size: 1em;
  line-height: 1.6;
  color: #FFFFFF;
}

.section table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.section table th,
.section table td {
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 10px;
  text-align: left;
}

.section table th {
  background: rgba(69, 175, 255, 0.2);
}

.section pre {
  background: rgba(0, 0, 0, 0.7);
  padding: 15px;
  border-radius: 10px;
  overflow: auto;
  position: relative;
}

.section pre code {
  color: #FFD700;
  font-family: 'Courier New', Courier, monospace;
}

/* 代码块前置标签 */
.section pre code::before {
  content: '代码示例';
  display: block;
  background: #FF9F0C;
  color: #000000;
  padding: 5px 10px;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  font-weight: 700;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

/* 图片样式 */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.image-grid img {
  width: 100%;
  border-radius: 15px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-grid img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

/* 提示文字样式 */
.prompt-text {
  text-align: center;
  font-size: 1.2em;
  margin: 40px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: 10px;
}

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

@keyframes particlesFlow {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

/* 响应式调整 */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .navbar ul {
    flex-direction: column;
    width: 100%;
  }

  .navbar ul li {
    width: 100%;
  }

  .navbar ul li .dropdown-menu {
    width: 100%;
  }

  .main {
    grid-template-columns: 1fr;
  }
}