/* 基础样式 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #000033, #330066);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png'), 
                url('https://images.gptkong.com/demo/sample2.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
    overflow: hidden;
}
.header h1 {
    font-size: 48px;
    font-weight: bold;
    text-shadow: 0 0 10px rgba(0, 255, 153, 0.8);
    animation: fadeIn 2s ease-in-out;
}
.header p {
    font-size: 20px;
    margin-top: 20px;
    opacity: 0.9;
}
@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(-20px); }
    100% { opacity: 1; transform: translateY(0); }
}
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 51, 0.8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    z-index: 1000;
}
.navbar a {
    color: #00ff99;
    text-decoration: none;
    font-size: 18px;
    margin: 0 10px;
    transition: color 0.3s ease;
}
.navbar a:hover {
    color: #ff69b4;
}
.section {
    width: 100%;
    margin: 40px 0;
    padding: 20px;
    background: rgba(0, 0, 51, 0.7);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 255, 153, 0.5);
}
.section h2 {
    font-size: 36px;
    color: #00ff99;
    margin-bottom: 20px;
}
.section p {
    font-size: 18px;
    line-height: 1.8;
}
.card {
    background: rgba(51, 0, 102, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.5);
    border-radius: 10px;
    padding: 20px;
    margin: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 153, 0.8);
}
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.image-grid img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
}
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .header h1 {
        font-size: 36px;
    }
    .section h2 {
        font-size: 28px;
    }
}
@media (max-width: 480px) {
    .header h1 {
        font-size: 28px;
    }
    .section h2 {
        font-size: 24px;
    }
}