img.lazy {
    display: block;
    width: 100%;
    max-width: 600px;
    min-height: 200px;   /* ·ΐΦΉΛιΖΑ */
    background: #f0f0f0;
    opacity: 0;
    transition: opacity 0.3s;
}

img.lazy.loaded {
    opacity: 1;
}