/*操作一下大标头*/
.header{
background-color: #f1f1f1;
padding: 10px;
text-align: center;
}

.header {
    position: relative;
    padding: 30px 0;
    overflow: hidden;
    background: linear-gradient(45deg, #12c2e9, #c471ed, #f64f59);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 25%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 25%);
    animation: shine 3s ease-in-out infinite;
}

.header h1 {
    position: relative;
    font-size: 3.5em;
    color: #ffffff;
    text-align: center;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    letter-spacing: 4px;
    text-transform: uppercase;
    text-shadow: 
        0 0 10px rgba(255,255,255,0.3),
        0 0 20px rgba(255,255,255,0.3),
        0 0 30px rgba(255,255,255,0.3);
    animation: textFloat 3s ease-in-out infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50% }
    50% { background-position: 100% 50% }
    100% { background-position: 0% 50% }
}

@keyframes shine {
    0% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 0.8; }
    100% { transform: scale(1); opacity: 0.5; }
}

@keyframes textFloat {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0px); }
}