/* 整体页面样式设置 */

/* 主体背景渐变，融合数字星河的主题色彩 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #121F3D 0%, #7E57C2 50%, #66BB6A 100%);
    color: #F5F5F5;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(18, 31, 61, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-size: 1.8em;
    color: #7E57C2;
    text-decoration: none;
}

.navbar .nav-links a {
    color: #F5F5F5;
    margin: 0 20px;
    text-decoration: none;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

.navbar .nav-links a:hover {
    color: #66BB6A;
}

/* 章节导航系统样式 */
.chapter-nav {
    position: fixed;
    top: 100px;
    right: 20px;
    background-color: rgba(18, 31, 61, 0.8);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.chapter-nav ul li {
    margin: 10px 0;
}

.chapter-nav ul li a {
    color: #F5F5F5;
    text-decoration: none;
    font-size: 1em;
    transition: color 0.3s ease;
}

.chapter-nav ul li a:hover {
    color: #66BB6A;
}

/* 主内容区域样式 */
.container {
    max-width: 1200px;
    margin: 120px auto 60px;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 20px;
}

.sidebar {
    background-color: rgba(30, 42, 73, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.sidebar 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;
}

.sidebar img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.3);
}

.main-content {
    background-color: rgba(18, 31, 61, 0.8);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.main-content h2, .main-content h3, .main-content h4 {
    color: #7E57C2;
}

.main-content pre {
    background-color: #1E2A49;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9em;
    margin: 20px 0;
}

.main-content code {
    background-color: #1E2A49;
    padding: 2px 4px;
    border-radius: 3px;
    color: #66BB6A;
}

/* 图片装饰样式 */
.decorative-images {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 40px 0;
}

.decorative-images img {
    width: 100%;
    max-width: 320px;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.decorative-images img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0,0,0,0.5);
}

/* 按钮样式 */
.btn {
    background-color: #7E57C2;
    color: #F5F5F5;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    font-size: 1em;
    margin-top: 20px;
    display: inline-block;
    text-decoration: none;
}

.btn:hover {
    background-color: #66BB6A;
    transform: translateY(-5px);
}

/* 流星动画样式 */
@keyframes shootingStar {
    0% {
        transform: translate(-10px, 0) rotate(45deg);
        opacity: 1;
    }
    100% {
        transform: translate(1000px, 800px) rotate(45deg);
        opacity: 0;
    }
}

.shooting-star {
    position: absolute;
    top: 10%;
    left: 0;
    width: 2px;
    height: 100px;
    background: linear-gradient(to bottom, #7E57C2, transparent);
    animation: shootingStar 5s linear infinite;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #1E2A49;
    color: #F5F5F5;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1.1em;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.collapsible:hover {
    background-color: #66BB6A;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: rgba(30, 42, 73, 0.9);
    border-radius: 5px;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .chapter-nav {
        top: auto;
        bottom: 20px;
    }
}