body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1E2027, #121212);
    color: #FFFFFF;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: #0074D9;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(90deg, #1E2027, #2C3E50);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    padding: 10px 20px;
    transition: all 0.3s ease;
}

.navbar a:hover {
    background-color: #0074D9;
    border-radius: 5px;
}

.hero {
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #FFFFFF;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.section {
    padding: 60px 20px;
    background: linear-gradient(135deg, #121212, #1E2027);
    margin-top: -100px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.section:nth-child(even) {
    background: linear-gradient(135deg, #1E2027, #121212);
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.feature-box {
    background: #1E2027;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-box:hover {
    transform: translateY(-10px);
}

.feature-box img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    margin-bottom: 15px;
    border-radius: 50%;
    border: 2px solid #0074D9;
}

.code-block {
    background: #121212;
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    margin-top: 20px;
    position: relative;
}

.code-block pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 14px;
    color: #00FF7F;
}

.code-block::before {
    content: '代码示例';
    position: absolute;
    top: 10px;
    left: 10px;
    background: #0074D9;
    color: #FFFFFF;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
}

.parallax {
    height: 500px;
    background: url('https://images.gptkong.com/demo/sample2.png') no-repeat center center/cover;
    background-attachment: fixed;
    position: relative;
    margin-top: 60px;
}

.parallax::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.parallax-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    text-align: center;
    color: #FFFFFF;
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .section {
        padding: 40px 10px;
    }

    .feature-box img {
        width: 80px;
        height: 80px;
    }
}