/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; /* 使用现代无衬线字体 */
    color: #2E4053; /* 主文本颜色 */
    background-color: #F5F5F5; /* 背景色 */
    line-height: 1.6;
    scroll-behavior: smooth; /* 平滑滚动效果 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(46, 64, 83, 0.9); /* 半透明深蓝色背景 */
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin: 0 15px;
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #2ECC71; /* 点缀色绿色 */
}

/* 主要内容区 */
.main {
    padding: 100px 20px 50px; /* 顶部预留导航栏空间 */
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    background: #FFFFFF;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    min-width: 500px; /* 每个板块最小宽度不低于500px */
    position: relative;
    overflow: hidden;
}

.section img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.section img:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.section h2 {
    font-size: 24px;
    margin-top: 15px;
    color: #2E4053;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.section p {
    font-size: 16px;
    color: #34495E;
    margin-top: 10px;
}

.code-block {
    background: #2E4053;
    color: #ECF0F1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Source Code Pro', monospace;
    margin: 20px 0;
}

.code-block code {
    display: block;
    white-space: pre;
}

.code-block::-webkit-scrollbar {
    height: 8px;
}

.code-block::-webkit-scrollbar-thumb {
    background: #7F8C8D;
    border-radius: 4px;
}

.cta-button {
    background-color: #F39C12;
    color: #FFFFFF;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease, transform 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    margin-top: 15px;
}

.cta-button:hover {
    background-color: #D68910;
    transform: scale(1.05);
}

@media (max-width: 1200px) {
    .main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar ul {
        flex-direction: column;
    }
    .navbar li {
        margin: 10px 0;
    }
    .section {
        min-width: 100%;
    }
}

/* 点缀元素 */
.decorative-line {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #2ECC71, #F39C12);
    margin: 20px 0;
}

.highlight {
    color: #2ECC71;
    font-weight: bold;
}

.hidden-content {
    display: none;
    font-size: 14px;
    color: #7F8C8D;
    margin-top: 10px;
}

.section .toggle-button {
    background: none;
    border: none;
    color: #2ECC71;
    cursor: pointer;
    padding: 0;
    font-size: 14px;
    text-decoration: underline;
}

.section .toggle-button:hover {
    color: #F39C12;
}

.fade-in {
    opacity: 0;
    animation: fadeIn 2s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* 提示信息样式 */
.reference-note {
    background: #2E4053;
    color: #FFFFFF;
    padding: 15px;
    text-align: center;
    font-size: 18px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin: 20px 0;
}