/* 全局样式 */
body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0A192F, #4ECDC4);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}
h1, h2, h3 {
    font-size: 2rem;
    font-weight: bold;
    margin: 1rem 0;
}
p {
    font-size: 1rem;
    margin: 0.8rem 0;
}
pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
}
code {
    color: #FF6B35;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}
th, td {
    border: 1px solid #4ECDC4;
    padding: 0.8rem;
    text-align: left;
}
th {
    background-color: #0A192F;
    color: #FFFFFF;
}

/* 首屏设计 */
.header-section {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #FFFFFF;
}
.header-section h1 {
    font-size: 3rem;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}
.header-section p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 1rem auto;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 25, 47, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}
.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}
.navbar a:hover {
    color: #FF6B35;
    text-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

/* 模块化布局 */
.module {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin: 2rem auto;
    max-width: 1200px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.module img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.fade-in {
    animation: fadeIn 2s ease-in-out;
}

/* 响应式设计 */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2, h3 { font-size: 1.8rem; }
    .header-section h1 { font-size: 2rem; }
    .module { padding: 1rem; }
}