/* introduction.css: 针对 "Introduction" 页面的特定样式 */

body {
    font-family: "Arial", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: #f9f9f9;
    background: url('images/background.jpg'); /* 替换为实际路径 */
    background-size: cover; /* 背景图片填充整个页面 */
    background-repeat: no-repeat; /* 不重复显示背景图片 */
    margin: 0;
    overflow-y: auto; /* 允许垂直滚动 */
}

/* 导航栏 */
.tabs {
    display: flex;
    justify-content: center; /* 水平居中 */
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    background: #f1f1f1;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.tab {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    text-transform: uppercase;
    padding: 10px 20px;
    border-radius: 25px;
    background: #e6e6e6;
    transition: background 0.3s ease, color 0.3s ease;
}

.tab:hover {
    background: #388e3c;
    color: #fff;
}

.tab.active {
    background: #ff7b7b;
    color: #fff;
}

.introduction-container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

h1 {
    color: #d46a6a;
    text-align: center;
    margin-bottom: 20px;
}

p {
    line-height: 1.8;
    margin-bottom: 15px;
    text-align: justify;
}

.introduction-footer {
    text-align: center;
    margin-top: 30px;
    font-size: 1.2em;
    color: #d46a6a;
}