/* 基础样式设置 */
body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #0D1B2A, #1B263B);
    color: #E0E1DD;
    overflow-x: hidden;
    line-height: 1.7;
}
h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    color: #FF6B6B;
    text-align: center;
}
a {
    color: #FF6B6B;
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: #E0E1DD;
}
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}
.section {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    position: relative;
}
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(13, 27, 42, 0.9);
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}
.logo {
    font-size: 24px;
    font-weight: bold;
    color: #FF6B6B;
}
.menu {
    list-style: none;
    display: flex;
    gap: 20px;
}
.menu li a {
    padding: 8px 12px;
    border-radius: 4px;
}
.menu li a:hover {
    background: #FF6B6B;
    color: #0D1B2A;
}
.hero {
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 27, 42, 0.7);
}
.hero-content {
    position: relative;
    z-index: 1;
}
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 40px 0;
}
.feature-card {
    background: #1B263B;
    border: 1px solid #778DA9;
    border-radius: 8px;
    padding: 20px;
    transition: transform 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-10px);
}
.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    background: #FF6B6B;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.feature-title {
    font-size: 18px;
    margin-bottom: 10px;
}
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
    padding: 40px 0;
}
.stat-item {
    background: #1B263B;
    border: 1px solid #778DA9;
    border-radius: 8px;
    padding: 20px;
}
.stat-number {
    font-size: 24px;
    color: #FF6B6B;
}
.stat-label {
    font-size: 16px;
}
.article {
    padding: 40px 0;
    background: #0D1B2A;
    color: #E0E1DD;
}
.article h2 {
    margin-bottom: 20px;
}
.article p {
    margin-bottom: 15px;
}
.footer {
    background: #0D1B2A;
    padding: 40px 0;
    text-align: center;
}
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 10px;
    }
    .features {
        grid-template-columns: 1fr;
    }
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
    }
}