body {
    margin: 0;
    padding: 0;
    font-family: 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: url('https://images.gptkong.com/article/b/983_0.png') no-repeat center center fixed;
    background-size: cover;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(128, 128, 255, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    position: relative;
    transition: color 0.3s ease;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0%;
    height: 2px;
    background: #FFD700;
    left: 0;
    bottom: -5px;
    transition: width 0.3s;
}

nav ul li a:hover {
    color: #FFD700;
}

nav ul li a:hover::after {
    width: 100%;
}

.header {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    background-image: url('https://images.gptkong.com/article/b/983_1.png');
    background-size: cover;
    background-position: center;
}

.header h1 {
    font-size: 48px;
    margin: 0;
    animation: fadeIn 2s ease-in-out;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.6);
}

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

.article {
    padding: 100px 20px 50px 20px;
    max-width: 900px;
    margin: auto;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.article section {
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e0e0e0;
    position: relative;
}

.article section:last-child {
    border-bottom: none;
}

.article h2, .article h3 {
    color: #6A5ACD;
    margin-bottom: 20px;
    position: relative;
    padding-left: 10px;
}

.article h2::before, .article h3::before {
    content: '';
    width: 5px;
    height: 100%;
    background: #FFD700;
    position: absolute;
    left: 0;
    top: 0;
    border-radius: 3px;
}

.article p {
    font-size: 16px;
    margin-bottom: 20px;
}

.article img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.article img:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 15px;
    }

    .header h1 {
        font-size: 32px;
    }

    .article {
        padding: 80px 15px 40px 15px;
    }
}

.flower-petal {
    position: fixed;
    top: -50px;
    width: 30px;
    height: 30px;
    background: rgba(255, 192, 203, 0.6);
    border-radius: 50%;
    animation: fall 10s linear infinite;
}

@keyframes fall {
    to {
        transform: translateY(100vh) rotate(360deg);
    }
}

.footer {
    text-align: center;
    padding: 20px;
    background: rgba(128, 128, 255, 0.8);
    color: #fff;
}