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

/* 全局字体与背景 */
body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: #ffffff;
  line-height: 1.6;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 250px 1fr;
  grid-gap: 20px;
  padding: 20px;
}

/* 侧边栏样式 */
.sidebar {
  background: rgba(26, 26, 26, 0.9);
  padding: 20px;
  border-radius: 10px;
  position: fixed;
  top: 20px;
  left: 20px;
  bottom: 20px;
  overflow-y: auto;
}

.sidebar h2 {
  margin-bottom: 20px;
  color: #ff9a5b;
}

.sidebar ul {
  list-style: none;
}

.sidebar ul li {
  margin-bottom: 15px;
}

.sidebar ul li a {
  color: #a0e7e5;
  text-decoration: none;
  font-size: 16px;
  transition: color 0.3s ease;
}

.sidebar ul li a:hover {
  color: #ff6f61;
}

/* 主内容区样式 */
.main-content {
  margin-left: 290px;
  background: rgba(18, 18, 18, 0.85);
  padding: 30px;
  border-radius: 10px;
  overflow: auto;
}

/* 标题样式 */
.main-content h1, .main-content h2, .main-content h3, .main-content h4 {
  color: #ff9a5b;
  margin-bottom: 15px;
}

.main-content h1 {
  font-size: 2.5em;
  text-align: center;
  margin-bottom: 30px;
}

.main-content h2 {
  font-size: 2em;
  margin-top: 30px;
}

.main-content h3 {
  font-size: 1.5em;
  margin-top: 25px;
}

.main-content h4 {
  font-size: 1.2em;
  margin-top: 20px;
}

/* 段落与列表 */
.main-content p {
  margin-bottom: 15px;
  color: #d1c4e9;
}

.main-content ul {
  list-style-type: disc;
  margin-left: 20px;
  margin-bottom: 15px;
}

.main-content ul li {
  margin-bottom: 10px;
  color: #b3e5fc;
}

/* 代码块样式 */
code {
  background: #263238;
  color: #80cbc4;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', Courier, monospace;
}

pre {
  background: #1c313a;
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 20px;
}

pre code {
  color: #eceff1;
}

/* 表格样式 */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

table th, table td {
  border: 1px solid #455a64;
  padding: 10px;
  text-align: left;
}

table th {
  background: #37474f;
  color: #ffcc80;
}

table td {
  background: #263238;
  color: #b0bec5;
}

/* 图片样式 */
img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
}

/* 按钮样式 */
.button {
  display: inline-block;
  padding: 10px 20px;
  background: linear-gradient(45deg, #ff9a5b, #ff6f61);
  color: #000000;
  border: none;
  border-radius: 5px;
  text-decoration: none;
  font-size: 16px;
  transition: background 0.3s ease;
}

.button:hover {
  background: linear-gradient(45deg, #ff6f61, #ff9a5b);
}

/* 响应式设计 */
@media (max-width: 1440px) {
  .sidebar {
    width: 220px;
  }

  .main-content {
    margin-left: 250px;
  }
}

@media (max-width: 1200px) {
  .sidebar {
    width: 200px;
    padding: 15px;
  }

  .main-content {
    margin-left: 220px;
    padding: 25px;
  }
}

@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }

  .main-content {
    margin-left: 0;
    padding: 20px;
  }
}

@media (max-width: 768px) {
  body {
    grid-template-columns: 1fr;
    padding: 10px;
  }

  .main-content {
    padding: 15px;
  }
}

@media (max-width: 480px) {
  .main-content h1 {
    font-size: 2em;
  }

  .main-content h2 {
    font-size: 1.75em;
  }

  .main-content h3 {
    font-size: 1.3em;
  }

  .main-content h4 {
    font-size: 1em;
  }

  .button {
    font-size: 14px;
    padding: 8px 16px;
  }
}

@media (max-width: 320px) {
  .main-content {
    padding: 10px;
  }

  .main-content h1 {
    font-size: 1.8em;
  }

  .main-content h2 {
    font-size: 1.5em;
  }

  .main-content h3 {
    font-size: 1.1em;
  }

  .main-content h4 {
    font-size: 0.9em;
  }

  .button {
    font-size: 12px;
    padding: 6px 12px;
  }
}

/* 粒子效果 */
.particle {
  position: absolute;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: float 5s infinite ease-in-out;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* 提示样式 */
.reference-note {
  background: rgba(255, 154, 91, 0.2);
  padding: 10px;
  border-left: 5px solid #ff9a5b;
  margin-bottom: 20px;
  border-radius: 4px;
  font-style: italic;
  color: #ffe0b2;
}

/* 链接样式 */
a {
  color: #80deea;
  text-decoration: underline;
}

a:hover {
  color: #ffcc80;
}

/* 代码高亮 */
.highlight-code {
  background: #263238;
  padding: 10px;
  border-radius: 5px;
  overflow-x: auto;
}