/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #1E274F 70%, #00C8FF 25%, #F5F7FA 5%);
    font-family: 'Roboto', sans-serif;
    color: #1E274F;
    line-height: 1.6;
    font-size: 16px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden; /* 避免出现水平滚动条 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(30, 39, 79, 0.9);
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar a {
    color: #F5F7FA;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #FFFFFF;
}

/* 主要内容容器 */
.container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 100px 40px 40px 40px; /* 顶部留出导航栏空间 */
}

/* 模块样式 */
.module {
    background-color: #FFFFFF;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.module:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 标题样式 */
h2, h3, h4 {
    color: #1E274F;
    margin-bottom: 15px;
}

h2 {
    font-size: 32px;
    text-align: center;
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 20px;
}

/* 正文样式 */
p {
    font-size: 16px;
    color: #333333;
    margin-bottom: 15px;
    text-align: justify;
}

/* 图片样式 */
img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 代码块样式 */
pre {
    background-color: #F5F7FA;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
    border-left: 4px solid #00C8FF;
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: #1E274F;
    font-size: 16px;
}

/* 按钮样式 */
.button {
    background: linear-gradient(45deg, #1E274F, #00C8FF);
    border: none;
    padding: 12px 25px;
    color: #F5F7FA;
    cursor: pointer;
    border-radius: 25px;
    transition: background 0.3s ease, transform 0.3s ease;
    font-size: 16px;
}

.button:hover {
    background: linear-gradient(45deg, #00C8FF, #1E274F);
    transform: scale(1.05);
}

/* 动态背景 */
.dynamic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #1E274F, #00C8FF);
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
    z-index: -1;
}

@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 折叠面板样式 */
.collapse {
    border: 1px solid #1E274F;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.collapse-header {
    background-color: #00C8FF;
    color: #FFFFFF;
    padding: 15px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.collapse-header:hover {
    background-color: #1E274F;
}

.collapse-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: #F5F7FA;
    padding: 0 15px;
}

.collapse.active .collapse-content {
    max-height: 500px;
    padding: 15px;
}

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

thead {
    background-color: #1E274F;
    color: #FFFFFF;
}

th, td {
    padding: 12px 15px;
    border: 1px solid #ddd;
    text-align: left;
}

tbody tr:nth-child(even) {
    background-color: #F5F7FA;
}

tbody tr:hover {
    background-color: #E0F7FF;
}

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

    .container {
        padding: 100px 20px 20px 20px;
    }
}

@media (max-width: 500px) {
    .container {
        padding: 100px 10px 10px 10px;
    }

    h2 {
        font-size: 28px;
    }

    h3 {
        font-size: 22px;
    }

    h4 {
        font-size: 18px;
    }

    .button {
        padding: 10px 20px;
        font-size: 14px;
    }
}

/* 提示信息样式 */
.alert {
    background-color: #FFEB3B;
    color: #1E274F;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin: 20px 0;
    font-size: 18px;
    font-weight: bold;
}

/* 链接样式 */
a {
    color: #00C8FF;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #1E274F;
}

/* 表单样式（如果有） */
input, textarea {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    box-sizing: border-box;
    border: 2px solid #1E274F;
    border-radius: 4px;
    resize: vertical;
}

input:focus, textarea:focus {
    border-color: #00C8FF;
    outline: none;
}

/* 侧边栏样式（如果有） */
.sidebar {
    background-color: #1E274F;
    color: #F5F7FA;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.sidebar a {
    display: block;
    margin: 10px 0;
    color: #F5F7FA;
}

.sidebar a:hover {
    color: #00C8FF;
}

/* 页脚样式 */
.footer {
    background-color: #1E274F;
    color: #F5F7FA;
    text-align: center;
    padding: 20px 40px;
    margin-top: auto;
}

.footer a {
    color: #00C8FF;
}

.footer a:hover {
    color: #FFFFFF;
}