.ip-container {
    max-width: 700px;
    margin: 1em auto;
    background: #f8f8f8;
    border-radius: 10px;
    padding: 1em;
}

.input-group {
    margin-bottom: 1.5em;
}

.input-group label {
    display: block;
    margin-bottom: 0.5em;
    font-weight: bold;
    font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

textarea, input[type="text"] {
    width: 100%;
    font-size: 1em;
    padding: 0.6em;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
    font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

textarea[readonly] {
    background: #eee;
    resize: none;
    height: 60px;
}

input[type="text"] {
    height: 40px;
}

button {
    margin-top: 0.5em;
    padding: 0.4em 1em;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    transition: 0.3s;
}

button:hover {
    background: #357ab8;
}