/* 全局样式重置与基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body, html {
    font-family: 'Open Sans', sans-serif;
    color: #E0E0E0;
    background: linear-gradient(135deg, #0A2647, #1C1C3C);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #B3E5FC;
    margin-bottom: 1rem;
}
p, li {
    font-size: 1rem;
    color: #CFD8DC;
    margin-bottom: 1rem;
}
a {
    color: #81D4FA;
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}
a:hover {
    color: #4FC3F7;
}
ul {
    list-style: none;
    padding-left: 1rem;
}
li::before {
    content: '•';
    color: #4FC3F7;
    margin-right: 0.5rem;
}
.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: auto;
    padding: 1rem;
}
.left-pane, .right-pane {
    flex: 1;
    padding: 1.5rem;
    border-radius: 10px;
    position: relative;
}
.left-pane {
    background: linear-gradient(135deg, #0A2647, #1E217C);
}
.right-pane {
    background: linear-gradient(135deg, #1E217C, #0A2647);
}
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .left-pane, .right-pane {
        width: 100%;
    }
}
.icon {
    width: 32px;
    height: 32px;
    background-color: #4FC3F7;
    border-radius: 50%;
    box-shadow: 0px 0px 15px rgba(0, 255, 255, 0.6);
    transition: transform 0.3s ease-in-out;
}
.icon:hover {
    transform: scale(1.2);
}
code, pre {
    background: rgba(0, 0, 0, 0.5);
    color: #B3E5FC;
    padding: 0.5rem;
    border-radius: 5px;
    font-family: 'Roboto Mono', monospace;
    overflow-x: auto;
}
pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1rem 0;
}
.section-header {
    text-align: center;
    margin-bottom: 2rem;
}
.section-header h1 {
    font-size: 2.5rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    position: relative;
}
.section-header h1::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: #81D4FA;
    margin: 0.5rem auto;
}
.background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png'), 
                url('https://images.gptkong.com/demo/sample2.png');
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.2;
    z-index: -1;
}