* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #8a2be2, #9370db, #d8bfd8);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

.content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.welcome-container {
    text-align: center;
    margin-bottom: 30px;
}

.full-name {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-transform: uppercase;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.2);
}

.welcome-text {
    color: white;
    font-size: 3.5rem;
    font-weight: bold;
    text-align: center;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    padding: 10px 20px;
}

.input-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-field {
    padding: 12px 15px;
    border: 2px solid white;
    border-radius: 5px;
    background-color: transparent;
    color: white;
    font-size: 1rem;
    outline: none;
    width: 250px;
    transition: all 0.3s ease;
}

.input-field:focus {
    border-color: #8a2be2;
    box-shadow: 0 0 10px rgba(138, 43, 226, 0.5);
}

.input-field::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.ok-button {
    padding: 12px 25px;
    border: 2px solid white;
    border-radius: 5px;
    background-color: transparent;
    color: white;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.ok-button:hover {
    background-color: #8a2be2;
    border-color: #8a2be2;
    color: white;
    box-shadow: 0 0 10px rgba(138, 43, 226, 0.5);
}

.message {
    color: white;
    margin-top: 15px;
    min-height: 20px;
    text-align: center;
    font-size: 0.9rem;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .full-name {
        font-size: 1rem;
        letter-spacing: 1px;
    }
    .welcome-text {
        font-size: 2.5rem;
    }
    .input-container {
        flex-direction: column;
    }
    .input-field {
        width: 100%;
    }
    .ok-button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .full-name {
        font-size: 0.9rem;
        letter-spacing: 0.5px;
    }
    .welcome-text {
        font-size: 2rem;
    }
}