/* ----------- 全局基础设置 ----------- */
body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
  background-color: #fafafa;
}

a {
  color: #007acc;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ----------- Header 区域 ----------- */
header {
  text-align: center;
  padding: 40px 20px;
  background: #f4f4f4;
  border-bottom: 1px solid #ddd;
}

.profile-pic {
  width: 150px;        /* 头像大小，可调 */
  height: auto;
  border-radius: 50%;  /* 圆形头像 */
  display: block;
  margin: 0 auto 15px; /* 居中，下面加点间距 */
}

header h1 {
  margin: 10px 0 5px;
  font-size: 2.2em;
  color: #2c3e50;
}

header p {
  margin: 0;
  font-size: 1.1em;
  color: #555;
}

nav {
  margin-top: 15px;
}
nav a {
  margin: 0 12px;
  font-weight: bold;
  font-size: 1em;
}
nav a:hover {
  color: #005a99;
}

/* ----------- Section 通用 ----------- */
section {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

section h2 {
  font-size: 1.6em;
  margin-bottom: 15px;
  border-bottom: 2px solid #007acc;
  padding-bottom: 5px;
  color: #2c3e50;
}

section p {
  text-align: justify;
}

/* ----------- 列表样式 ----------- */
ul {
  list-style: none;
  padding: 0;
}
ul li {
  margin: 12px 0;
  line-height: 1.5;
}

/* ----------- 视频 iframe 响应式 ----------- */
iframe {
  max-width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* ----------- 联系方式 ----------- */
#contact p {
  text-align: center;
  font-size: 1.1em;
}
#contact a {
  margin: 0 8px;
}

/* ----------- Footer ----------- */
footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  background: #f4f4f4;
  color: #555;
  border-top: 1px solid #ddd;
}