/* 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 */
    font-size: 16px; /* 设置基础字体大小 */
    color: #FFFFFF; /* 主文字颜色为白色 */
    background: linear-gradient(135deg, #1E2B4A 70%, #35B7AD 25%, #FF8C00 5%); /* 70%主色，25%辅色，5%点缀色的渐变背景 */
    line-height: 1.6;
}

/* 容器设置 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px; /* 元素间隙 */
}

/* 头部样式 */
.header {
    width: 100%;
    text-align: center;
    padding: 40px 0;
    background-color: rgba(30, 43, 74, 0.8); /* 半透明背景 */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.header h1 {
    font-size: 2.5em; /* 大标题字号 */
    margin-bottom: 10px;
    color: #FFFFFF;
}

.header p {
    font-size: 1.2em;
    color: #F4F6F8;
}

/* 导航栏样式 */
.navbar {
    width: 100%;
    background-color: rgba(30, 43, 74, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 15px;
    font-size: 1em;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #35B7AD;
}

/* 主要内容区 */
.main-content {
    width: 100%;
    margin-top: 100px; /* 为固定导航栏留出空间 */
}

.article {
    background-color: rgba(30, 43, 74, 0.85);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    color: #FFFFFF;
}

.article h2, .article h3, .article h4 {
    color: #FF8C00; /* 标题颜色使用点缀色 */
}

.article p {
    margin-bottom: 15px;
    font-size: 1em;
    line-height: 1.8;
}

.article pre {
    background-color: #1E2B4A;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
}

.article code {
    color: #35B7AD;
    font-family: 'Courier New', Courier, monospace;
}

/* 图片样式 */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.image-gallery img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-gallery img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.4);
}

/* 提示信息样式 */
.prominent-message {
    width: 100%;
    text-align: center;
    padding: 20px;
    background-color: rgba(255, 140, 0, 0.9); /* 点缀色背景 */
    color: #FFFFFF;
    font-size: 1.5em;
    font-weight: bold;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    margin-bottom: 30px;
}

/* 响应式设计 */
@media (max-width: 1920px) {
    .header h1 {
        font-size: 2.5em;
    }
}

@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .navbar a {
        margin: 10px 0;
    }
    .image-gallery {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 2em;
    }
    .prominent-message {
        font-size: 1.2em;
    }
    .article {
        padding: 15px;
    }
    .image-gallery {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

/* 微交互与动画效果 */
.button-cta {
    background-color: #FF8C00; /* CTA按钮使用点缀色 */
    border: none;
    padding: 10px 25px;
    color: #FFFFFF;
    font-size: 1em;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.button-cta:hover {
    background-color: #e07b00;
    transform: translateY(-3px);
}

.collapsible {
    background-color: rgba(30, 43, 74, 0.7);
    color: #FFFFFF;
    cursor: pointer;
    padding: 10px 15px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1em;
    transition: background-color 0.3s ease;
    border-radius: 5px;
    margin-bottom: 10px;
}

.active, .collapsible:hover {
    background-color: #35B7AD;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: rgba(30, 43, 74, 0.5);
    border-radius: 5px;
}

@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

.fade-in {
    animation: fadeIn 1s ease-in;
}