/* 全局样式重置 */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根变量定义 */
:root {
    --primary-gradient: linear-gradient(135deg, #1e3c72, #2a5298);
    --secondary-gradient: linear-gradient(90deg, #ff7e5f, #feb47b);
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-bg-hover: rgba(255, 255, 255, 0.2);
    --text-color: #ffffff;
    --accent-color: #ffffff;
    --code-bg: rgba(0, 0, 0, 0.7);
    --button-bg: rgba(76, 175, 80, 0.8);
    --button-bg-hover: rgba(69, 160, 73, 0.9);
    --font-family: 'Helvetica Neue', Arial, sans-serif;
}

/* 全局字体和背景 */
body {
    font-family: var(--font-family);
    background: var(--primary-gradient);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 容器样式 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    text-align: center;
    padding: 60px 0;
    animation: fadeIn 2s ease-in-out;
    position: relative;
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: var(--secondary-gradient);
    -webkit-background-clip: text;
    color: transparent;
}

header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 动态粒子背景 */
.background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,87,34,0.5), transparent);
    animation: aurora-move 15s linear infinite;
    z-index: -1;
}

/* 主内容区 */
main {
    flex: 1;
}

/* 模块化网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

/* 玻璃拟态卡片 */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    padding: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 48px 0 rgba(31, 38, 135, 0.5);
    background: var(--card-bg-hover);
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--button-bg);
    color: var(--accent-color);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    text-decoration: none;
    font-size: 1rem;
}

.button:hover {
    background-color: var(--button-bg-hover);
    transform: scale(1.1);
}

/* 示例展示文章区 */
.article-section {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    margin: 50px 0;
}

.article-section h2,
.article-section h3,
.article-section h4 {
    color: var(--accent-color);
    margin-bottom: 15px;
}

.article-section p {
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1rem;
}

.article-section pre {
    background: var(--code-bg);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 20px;
    font-family: 'Courier New', Courier, monospace;
    color: #00ffcc;
}

.article-section code {
    color: #00ffcc;
}

/* 图片样式 */
img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 20px;
}

/* 提示文字样式 */
.note {
    text-align: center;
    font-size: 1rem;
    margin-top: 20px;
    color: #ffdd57;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 20px 0;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 -8px 32px 0 rgba(31, 38, 135, 0.37);
    font-size: 0.9rem;
    margin-top: auto;
}

/* 动画关键帧 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes aurora-move {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 响应式设计 */
@media (max-width: 1440px) {
    header h1 {
        font-size: 3rem;
    }
}

@media (max-width: 1200px) {
    .grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 1024px) {
    header h1 {
        font-size: 2.5rem;
    }
    .article-section {
        padding: 25px;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    .grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    .button {
        font-size: 0.9rem;
        padding: 8px 16px;
    }
}

@media (max-width: 320px) {
    header h1 {
        font-size: 1.5rem;
    }
    .button {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

/* 代码块样式防止横向滚动 */
pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 链接样式 */
a {
    color: #ffdd57;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #ffffff;
}