/* 基本样式设置 */
:root {
    --primary-color: #0074D9;
    --secondary-color: #333333;
    --accent-color: #FFA500;
    --background-color: #F5F5F5;
    --gradient-bg: linear-gradient(135deg, #6E8EFb, #a777e3);
    --font-family: 'Roboto', sans-serif;
    --card-bg: #FFFFFF;
    --card-shadow: rgba(0, 0, 0, 0.1);
    --header-height: 60px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--secondary-color);
    background: var(--background-color);
    padding: 20px;
}

header {
    height: var(--header-height);
    background: var(--gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 1.5rem;
    border-radius: 8px;
    margin-bottom: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--card-shadow);
    padding: 20px;
    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: auto;
    border-radius: 8px;
    margin-bottom: 15px;
}

.card h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.card p {
    margin-bottom: 10px;
}

.card a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

.card a[rel="nofollow"] {
    /* 确保所有内部链接都有 rel="nofollow" */
}

.article-section {
    background-color: #FFFFFF;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--card-shadow);
    margin-bottom: 20px;
}

.article-section h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.article-section h3 {
    color: var(--secondary-color);
    margin: 15px 0 10px 0;
}

.article-section h4 {
    color: var(--accent-color);
    margin: 10px 0;
}

.article-section p {
    margin-bottom: 10px;
}

.article-section pre {
    background-color: #f0f0f0;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 15px;
}

.article-section code {
    background-color: #e8e8e8;
    padding: 2px 4px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
}

.footer {
    text-align: center;
    padding: 20px;
    background: var(--gradient-bg);
    color: #FFFFFF;
    border-radius: 8px;
    margin-top: 20px;
}

@media (max-width: 320px) {
    body {
        padding: 10px;
    }
    header {
        font-size: 1.2rem;
    }
}

@media (min-width: 321px) and (max-width: 480px) {
    header {
        font-size: 1.3rem;
    }
    .card {
        padding: 15px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    header {
        font-size: 1.4rem;
    }
    .card {
        padding: 18px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    header {
        font-size: 1.5rem;
    }
}

@media (min-width: 1025px) and (max-width: 1200px) {
    .container {
        padding: 30px;
    }
}

@media (min-width: 1201px) and (max-width: 1440px) {
    .container {
        padding: 40px;
    }
}

@media (min-width: 1441px) {
    .container {
        padding: 50px;
    }
}

/* 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;
}

/* 代码块样式 */
.code-block {
    background-color: #2d2d2d;
    color: #f8f8f2;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
}

/* 链接样式 */
a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: #FFFFFF;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: darken(var(--primary-color), 10%);
}

/* 图片布局 */
.image-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.image-gallery img {
    width: calc(25% - 10px);
    border-radius: 8px;
}

@media (max-width: 768px) {
    .image-gallery img {
        width: calc(50% - 10px);
    }
}

@media (max-width: 480px) {
    .image-gallery img {
        width: 100%;
    }
}