/* 全局样式 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: #ffffff;
    line-height: 1.6;
    letter-spacing: 0.5px;
}

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

/* 头部样式 */
header {
    text-align: center;
    padding: 50px 0;
    background: radial-gradient(circle, rgba(255,87,34,0.8), transparent);
    animation: aurora-move 15s linear infinite;
    border-bottom: 2px solid rgba(255,255,255,0.2);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #ffffff;
}

header p {
    font-size: 1.2em;
    color: #ffdd57;
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

/* 卡片样式 */
.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.card img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 15px;
}

.card h3 {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: #ff6f00;
}

.card p {
    font-size: 1em;
    line-height: 1.5;
    color: #ffffff;
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 15px;
    background: #ff6f00;
    color: #ffffff;
    border: none;
    border-radius: 25px;
    text-decoration: none;
    font-size: 0.9em;
    transition: background 0.3s;
}

.button:hover {
    background: #ff8c42;
}

/* 文章样式 */
article {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 12px;
    margin-top: 60px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

article h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #ffffff;
}

article h3, article h4 {
    color: #ff6f00;
}

article p, article ul, article ol, article table {
    color: #ffffff;
}

article pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    color: #00ff00;
    font-family: 'Roboto Mono', monospace;
    line-height: 1.5;
    margin: 20px 0;
}

article code {
    font-family: 'Roboto Mono', monospace;
    color: #00ff00;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table, th, td {
    border: 1px solid #ffffff;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background: #ff6f00;
    color: #ffffff;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .container {
        width: 95%;
    }
}

@media (max-width: 1200px) {
    header h1 {
        font-size: 2.2em;
    }

    article h2 {
        font-size: 1.8em;
    }
}

@media (max-width: 1024px) {
    .grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }
}

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

    .card h3 {
        font-size: 1.2em;
    }

    .button {
        padding: 8px 16px;
        font-size: 0.8em;
    }
}

@media (max-width: 480px) {
    header {
        padding: 30px 0;
    }

    header h1 {
        font-size: 1.5em;
    }

    .grid {
        grid-template-columns: 1fr;
    }

    article {
        padding: 20px;
    }
}

@media (max-width: 320px) {
    .card {
        padding: 15px;
    }

    .button {
        padding: 6px 12px;
        font-size: 0.7em;
    }
}

/* 动画效果 */
@keyframes aurora-move {
    0% { background: radial-gradient(circle, rgba(255,87,34,0.8), transparent); }
    50% { background: radial-gradient(circle, rgba(34,193,195,0.8), transparent); }
    100% { background: radial-gradient(circle, rgba(255,87,34,0.8), transparent); }
}