body {
    font-family: Arial, sans-serif;
    background-color: #f0f8ff;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.upload-container {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
    border: 2px dashed #ffffff;
    border-radius: 15px;
    width: 450px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
    color: #ffffff;
}

.upload-container h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #ffffff;
}

.upload-container input[type="file"] {
    display: none;
}

.upload-container label {
    display: block;
    padding: 12px 25px;
    background-color: #ffffff;
    color: #2575fc;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 15px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.upload-container label:hover {
    background-color: #e0e0e0;
}

.drag-area {
    border: 2px dashed #ffffff;
    border-radius: 10px;
    padding: 25px;
    background-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    margin-bottom: 15px;
    font-size: 16px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.drag-area.dragover {
    background-color: rgba(255, 255, 255, 0.4);
    border-color: #ffffff;
}

.submit-btn {
    padding: 12px 25px;
    background-color: #28a745;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: #218838;
}

.password-container {
    margin-top: 15px;
    text-align: left;
}

.password-label {
    display: block;
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 8px;
    cursor: default; /* 禁止点击 */
}

.password-input {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    margin-bottom: 15px;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.password-input:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}