/* 基本重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式 */
body {
    background-color: #121212;
    color: #FFFFFF;
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    padding: 20px;
    transition: background 0.5s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', sans-serif;
    color: #00FFAA;
    margin-bottom: 15px;
}

p {
    margin-bottom: 15px;
}

a {
    color: #00FFAA;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #FF6F61;
}

.container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 20px;
}

.sidebar {
    background-color: #1E1E1E;
    padding: 20px;
    border-radius: 8px;
    position: sticky;
    top: 20px;
    height: fit-content;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    margin-bottom: 15px;
}

.sidebar a {
    display: block;
    padding: 10px;
    background: #00FFAA;
    color: #121212;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.sidebar a:hover {
    background: #FF6F61;
    color: #FFFFFF;
}

.main-content {
    background-color: #1A1A1A;
    padding: 20px;
    border-radius: 8px;
}

.banner {
    width: 100%;
    height: 300px;
    background: radial-gradient(circle, rgb(255, 87, 34), transparent);
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    animation: aurora-move 15s linear infinite;
}

@keyframes aurora-move {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}

.banner::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
    opacity: 0.5;
}

.section {
    margin-top: 30px;
}

.card {
    background-color: #00FFAA;
    color: #121212;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

.code-block {
    background-color: #2E2E2E;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    color: #00FFAA;
    margin-bottom: 15px;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.footer {
    margin-top: 40px;
    text-align: center;
    color: #AAAAAA;
    font-size: 14px;
}

@media (max-width: 1440px) {
    .container {
        grid-template-columns: 200px 1fr;
    }
}

@media (max-width: 1200px) {
    .container {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: relative;
        top: 0;
    }
}

@media (max-width: 1024px) {
    .banner {
        height: 200px;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .banner {
        height: 150px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    .banner {
        height: 100px;
    }
    .sidebar a {
        padding: 8px;
        font-size: 14px;
    }
}

@media (max-width: 320px) {
    .banner {
        height: 80px;
    }
    .sidebar a {
        padding: 6px;
        font-size: 12px;
    }
}

button, .button {
    background-color: #00FFAA;
    color: #121212;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

button:hover, .button:hover {
    background-color: #FF6F61;
    color: #FFFFFF;
    transform: scale(1.05);
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #121212;
        color: #FFFFFF;
    }
}

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 160px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%; 
    left: 50%;
    margin-left: -80px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .sidebar {
        margin-bottom: 20px;
    }
}