/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: linear-gradient(135deg, #000046, #2980b9);
    overflow-x: hidden;
}
a {
    color: #03a9f4;
    text-decoration: none;
}
a[rel="nofollow"] {
    /* 不显示任何链接属性的说明 */
}
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
header {
    text-align: center;
    padding: 50px 0;
    background: linear-gradient(135deg, #000046, #2980b9);
    position: relative;
}
header h1 {
    font-size: 2.5rem;
    color: #ffffff;
    margin-bottom: 20px;
}
header p {
    font-size: 1.2rem;
    color: #cccccc;
}
.header-decoration {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
    opacity: 0.1;
    z-index: -1;
}
.section-title {
    font-size: 2rem;
    color: #03a9f4;
    margin: 40px 0 20px 0;
    text-align: center;
}
.article-content {
    background: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}
.article-content h2,
.article-content h3,
.article-content h4 {
    color: #03a9f4;
    margin-bottom: 15px;
}
.article-content p {
    margin-bottom: 15px;
    color: #dddddd;
}
.article-content pre {
    background: #1e1e1e;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 15px;
}
.article-content code {
    color: #ff9800;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}
.article-content th,
.article-content td {
    border: 1px solid #555555;
    padding: 10px;
    text-align: center;
}
.article-content th {
    background: #333333;
}
.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin: 40px 0;
}
.images-grid img {
    width: 100%;
    border-radius: 10px;
    transition: transform 0.3s ease;
}
.images-grid img:hover {
    transform: scale(1.05);
}
.footer-note {
    text-align: center;
    font-size: 1rem;
    color: #cccccc;
    margin: 40px 0;
}
@media (max-width: 1440px) {
    header h1 {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
}
@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
    header h1 {
        font-size: 2rem;
    }
}
@media (max-width: 1024px) {
    .article-content {
        padding: 20px;
    }
}
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
}
@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }
    .section-title {
        font-size: 1.2rem;
    }
    .article-content pre {
        font-size: 0.9rem;
    }
}
@media (max-width: 320px) {
    header h1 {
        font-size: 1.2rem;
    }
    .section-title {
        font-size: 1rem;
    }
    .article-content pre {
        font-size: 0.8rem;
    }
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') repeat;
    opacity: 0.05;
    z-index: -2;
}
button {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
    border: none;
    padding: 15px 30px;
    color: #ffffff;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
button:hover {
    background: linear-gradient(135deg, #2575fc, #6a11cb);
    box-shadow: 0 0 10px rgba(37, 117, 252, 0.7);
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.fade-in {
    animation: fadeIn 2s ease-in-out;
}