/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0A2540, #6FCF97);
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

/* 头部样式 */
header {
    background: linear-gradient(90deg, #F2C94C, #6FCF97);
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: #fff;
    font-size: 2.5em;
}

/* 导航菜单 */
nav {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    gap: 15px;
}

nav a {
    text-decoration: none;
    color: #0A2540;
    background: #F2C94C;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background 0.3s ease;
}

nav a:hover {
    background: #e0b93c;
}

/* 主内容区 */
main {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 20px;
}

.sidebar {
    background: rgba(255, 255, 255, 0.8);
    padding: 15px;
    border-radius: 8px;
}

.content {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 示例展示样式 */
.article {
    margin-top: 20px;
}

.article h2 {
    color: #0A2540;
    margin-bottom: 10px;
}

.article p {
    margin-bottom: 15px;
}

.article pre {
    background: #f4f4f4;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

.article code {
    font-family: 'Courier New', Courier, monospace;
    color: #c7254e;
}

/* 卡片式布局 */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.card {
    background: linear-gradient(135deg, #ffffff, #f9f9f9);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

.card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.card-content {
    padding: 15px;
}

.card-content h3 {
    margin-bottom: 10px;
    color: #0A2540;
}

.card-content p {
    margin-bottom: 15px;
    color: #555;
}

.card-content a {
    text-decoration: none;
    color: #fff;
    background: #0A2540;
    padding: 8px 12px;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.card-content a:hover {
    background: #082331;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    main {
        grid-template-columns: 1fr 2.5fr;
    }
}

@media (max-width: 1024px) {
    main {
        grid-template-columns: 1fr;
    }

    nav {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    .card img {
        height: 140px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 1.8em;
    }

    nav a {
        padding: 8px 16px;
        font-size: 0.9em;
    }

    .card img {
        height: 120px;
    }

    .card-content h3 {
        font-size: 1.1em;
    }

    .card-content p {
        font-size: 0.9em;
    }
}

@media (max-width: 320px) {
    header h1 {
        font-size: 1.5em;
    }

    nav a {
        padding: 6px 12px;
        font-size: 0.8em;
    }

    .card img {
        height: 100px;
    }

    .card-content h3 {
        font-size: 1em;
    }

    .card-content p {
        font-size: 0.8em;
    }
}

/* 动画效果 */
@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

body {
    background: radial-gradient(circle, rgb(255, 87, 34), transparent);
    animation: aurora-move 15s linear infinite;
}

/* 提示信息样式 */
.notice {
    text-align: center;
    margin-top: 40px;
    font-size: 1.2em;
    color: #fff;
}