body {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: url('https://images.gptkong.com/article/b/1192_0.png') no-repeat center center fixed;
    background-size: cover;
    color: #2E2E2E;
    line-height: 1.6;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(46, 46, 46, 0.8);
    color: #fff;
    padding: 10px 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
}

nav a {
    color: #FFD700;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #FF8C00;
}

.section {
    padding: 100px 20px 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    margin-top: 60px;
}

.section:nth-child(even) {
    background: rgba(240, 255, 240, 0.8);
}

h2 {
    font-size: 24px;
    color: #228B22;
    margin-bottom: 20px;
    position: relative;
}

h2::after {
    content: '';
    width: 50px;
    height: 3px;
    background: #FFD700;
    position: absolute;
    left: 0;
    bottom: -10px;
}

p {
    font-size: 17px;
    color: #2E2E2E;
    margin-bottom: 20px;
}

img {
    display: block;
    max-width: 900px;
    width: 100%;
    height: auto;
    margin: 20px auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

.decorative-line {
    height: 3px;
    background: linear-gradient(90deg, #228B22, #FFD700);
    margin: 40px 0;
    border: none;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }
    nav a {
        padding: 10px 0;
        border-top: 1px solid #FFD700;
    }
    .section {
        padding: 80px 15px 40px 15px;
    }
    h2 {
        font-size: 20px;
    }
    p {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    nav a {
        font-size: 14px;
    }
    h2 {
        font-size: 18px;
    }
    p {
        font-size: 14px;
    }
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.4);
    pointer-events: none;
    z-index: 1;
    animation: lightEffect 10s infinite alternate;
}

@keyframes lightEffect {
    0% {background: rgba(255, 255, 255, 0.4);}
    100% {background: rgba(255, 255, 255, 0.2);}
}

.footer {
    text-align: center;
    padding: 20px;
    background: rgba(46, 46, 46, 0.8);
    color: #fff;
}

.footer a {
    color: #FFD700;
    text-decoration: none;
    margin: 0 10px;
}

.footer a:hover {
    color: #FF8C00;
}

nav a::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    background: url('https://images.gptkong.com/demo/icon.png') no-repeat center center;
    background-size: contain;
    margin-right: 8px;
    vertical-align: middle;
}

.flower-petal {
    position: fixed;
    top: -50px;
    width: 30px;
    height: 30px;
    background: url('https://images.gptkong.com/article/b/1192_3.png') no-repeat center center;
    background-size: cover;
    animation: fall 15s linear infinite;
    opacity: 0.8;
}

@keyframes fall {
    0% {transform: translateX(0) rotate(0deg); top: -50px;}
    100% {transform: translateX(100px) rotate(360deg); top: 100vh;}
}