/* 全局样式设置 */
/* 设置页面的背景色、字体和基础排版 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; /* 采用现代无衬线字体 */
    font-size: 16px;
    line-height: 1.6;
    background: linear-gradient(135deg, #032B44 70%, #4ECDC4 25%, #FFA726 5%);
    color: #032B44;
    overflow-x: hidden; /* 避免出现水平滚动条 */
}

/* 容器布局 */
.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr)); /* 每个板块宽度不小于500px */
    gap: 40px;
    padding: 40px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 40px;
    background: rgba(3, 43, 68, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background 0.3s ease;
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(3, 43, 68, 1);
}

/* 导航链接样式 */
.nav-links a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 15px;
    font-size: 16px;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #FFA726; /* 点缀色用于悬停效果 */
}

/* 主题提示样式 */
.theme-note {
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    margin: 60px 0 40px 0;
    color: #FFFFFF;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

/* 文章内容样式 */
.content {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 30px;
    color: #FFFFFF;
}

/* 标题样式 */
h2, h3, h4 {
    color: #FFFFFF;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

h3 {
    font-size: 20px;
    margin-top: 20px;
    margin-bottom: 15px;
}

h4 {
    font-size: 18px;
    margin-top: 15px;
    margin-bottom: 10px;
}

/* 段落样式 */
p {
    font-size: 16px;
    margin-bottom: 15px;
    text-align: justify;
}

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

table th, table td {
    border: 1px solid #FFFFFF;
    padding: 10px;
    text-align: center;
}

table th {
    background: rgba(3, 43, 68, 0.6);
}

table td {
    background: rgba(3, 43, 68, 0.4);
}

/* 代码块样式 */
pre {
    background: rgba(0, 0, 0, 0.6);
    padding: 15px;
    border-radius: 10px;
    overflow: auto;
    position: relative;
}

pre code {
    color: #4ECDC4;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

pre code::before {
    content: '代码示例';
    position: absolute;
    top: -20px;
    left: 10px;
    background: #032B44;
    color: #FFFFFF;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
}

/* 图片装饰样式 */
.decorative-img {
    width: 100%;
    max-width: 320px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.decorative-img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.5);
}

/* 按钮样式 */
.btn {
    background-color: #FFA726;
    border: none;
    border-radius: 25px;
    padding: 12px 25px;
    color: #FFFFFF;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s, box-shadow 0.3s;
    font-size: 16px;
}

.btn:hover {
    background-color: #FFB74D;
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 联系按钮样式 */
.contact-btn {
    background-color: #4ECDC4;
    color: #FFFFFF;
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.contact-btn:hover {
    background-color: #66DDD0;
    transform: translateY(-5px);
}

/* 数据可视化进度条样式 */
.progress-bar {
    width: 0;
    height: 20px;
    background: #4ECDC4;
    animation: fill 2s forwards;
}

@keyframes fill {
    to { width: 100%; }
}

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

    .nav-links {
        display: flex;
        flex-direction: column;
        width: 100%;
    }

    .nav-links a {
        margin: 10px 0;
    }

    .container {
        grid-template-columns: 1fr;
        padding: 20px;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    h2 {
        font-size: 22px;
    }

    h3 {
        font-size: 18px;
    }

    .navbar {
        padding: 15px 20px;
    }

    .nav-links a {
        font-size: 14px;
    }

    .theme-note {
        font-size: 18px;
    }
}

/* 折叠区域样式 */
.collapsible {
    background-color: rgba(3, 43, 68, 0.6);
    color: #FFFFFF;
    cursor: pointer;
    padding: 10px 20px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 10px;
    transition: background-color 0.3s;
}

.collapsible:hover {
    background-color: #4ECDC4;
}

.content-collapsible {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: rgba(3, 43, 68, 0.4);
    border-radius: 0 0 10px 10px;
}

.collapsible.active + .content-collapsible {
    max-height: 500px; /* 根据内容适当调整 */
}

/* 强调色使用 */
.highlight {
    color: #FFA726;
    font-weight: bold;
}

/* 过渡效果 */
.transition-all {
    transition: all 0.3s ease;
}