* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: black;
}

.hidden {
    display: none !important;
}

.container {
    display: flex;
    width: 100%;
    min-height: 100vh;
    font-size: 14px;
    letter-spacing: 1px;
    justify-content: center;
    align-items: center;
    position: relative; /* 或 absolute/fixed */
}