/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #2c3e50, #34495e); /* 主色调渐变背景 */
    color: #ecf0f1; /* 主文字颜色 */
    font-family: 'Open Sans', sans-serif; /* 正文字体 */
    line-height: 1.6;
    overflow-x: hidden; /* 禁止水平滚动 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(44, 62, 80, 0.9); /* 半透明背景 */
    padding: 15px 30px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar a {
    color: #ecf0f1;
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #e67e22; /* 强调色悬停效果 */
}

/* 主内容区样式 */
main {
    padding: 100px 20px 50px 20px; /* 顶部留出导航栏空间 */
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    grid-gap: 20px;
}

/* 章节导航样式 */
.chapter-nav {
    position: fixed;
    top: 100px;
    right: 20px;
    background-color: rgba(44, 62, 80, 0.9);
    padding: 10px;
    border-radius: 8px;
}

.chapter-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.chapter-nav li {
    margin-bottom: 10px;
}

.chapter-nav a {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.chapter-nav a:hover {
    color: #e67e22;
}

/* 文章内容样式 */
article {
    background-color: rgba(44, 62, 80, 0.8);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

article h2, article h3, article h4 {
    font-family: 'Roboto', sans-serif; /* 标题字体 */
    color: #ffffff;
    margin-top: 20px;
}

article p {
    font-size: 16px;
    color: #ecf0f1;
    margin: 10px 0;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    max-width: 320px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin: 20px 0;
}

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

/* 代码块样式 */
pre code.language-css {
    display: block;
    padding: 15px;
    background-color: #2c3e50;
    color: #ecf0f1;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin: 20px 0;
}

/* 强调色按钮样式 */
.button-primary {
    background-color: #e67e22;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    text-decoration: none;
    display: inline-block;
    margin: 10px 0;
}

.button-primary:hover {
    background-color: #d35400;
    transform: scale(1.05);
}

/* 用户仪表盘按钮 */
.dashboard-button {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    perspective: 1000px;
    transition: transform 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.dashboard-button:hover {
    transform: rotateY(15deg) scale(1.1);
    background-color: #34495e;
}

/* 加载动画样式 */
.loading-spinner {
    border: 8px solid rgba(255, 255, 255, 0.3);
    border-top: 8px solid #e67e22;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 响应式布局 */
@media (min-width: 768px) {
    main {
        grid-template-columns: 3fr 1fr; /* 主内容与导航 */
    }
    .chapter-nav {
        top: 150px;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .chapter-nav {
        display: none; /* 小屏幕隐藏章节导航 */
    }
}

/* 链接样式 */
a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #e67e22;
}

/* 按钮与链接的统一样式 */
.button, .link-button {
    padding: 10px 20px;
    background-color: #e67e22;
    color: #fff;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.button:hover, .link-button:hover {
    background-color: #d35400;
    transform: scale(1.05);
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table th, table td {
    padding: 10px;
    border: 1px solid #34495e;
    text-align: left;
}

table th {
    background-color: #2980b9;
    color: #ecf0f1;
}

table tr:nth-child(even) {
    background-color: #2c3e50;
}

/* 列表样式 */
ul, ol {
    margin: 10px 0 10px 20px;
}

li {
    margin-bottom: 5px;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #34495e;
    color: #ecf0f1;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.collapsible:hover {
    background-color: #3c5a7a;
}

.content {
    padding: 0 15px;
    display: none;
    background-color: #2c3e50;
    overflow: hidden;
    border-radius: 5px;
    margin-bottom: 10px;
}

/* 点缀色样式 */
.accent {
    color: #e67e22;
}

/* Footer样式 */
footer {
    background-color: rgba(44, 62, 80, 0.9);
    color: #ecf0f1;
    text-align: center;
    padding: 20px;
    margin-top: 50px;
    border-top: 1px solid #34495e;
}

footer a {
    color: #e67e22;
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    text-decoration: underline;
}

/* 悬停和过渡效果 */
.hover-effect:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* 图标样式 */
.icon {
    width: 40px;
    height: 40px;
    background-size: contain;
    display: inline-block;
    margin-right: 10px;
}

.icon-risk {
    background-image: url('https://images.gptkong.com/demo/sample1.png');
}

.icon-compliance {
    background-image: url('https://images.gptkong.com/demo/sample2.png');
}

/* 弹性布局 */
.flex-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.flex-item {
    flex: 1 1 45%;
    margin: 10px 0;
}

/* 页内链接平滑滚动 */
html {
    scroll-behavior: smooth;
}