body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #005AA7, #FFFDE4);
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    box-sizing: border-box;
}

.container {
    background: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 800px;
    width: 90%;
    box-sizing: border-box;
}

/* 增加字体和控件基本样式 */
h1 {
    margin-bottom: 20px;
    font-size: 2em;
    color: #005AA7;
}

.row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.row div {
    margin: 10px 0;
    flex: 1;
    min-width: 200px;
}

/* 控件样式 */
label {
    font-size: 1.1em;
}

select {
    padding: 10px;
    margin: 0 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1em;
    width: 100%;
    box-sizing: border-box;
}

.button-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.button-row button {
    padding: 15px 25px;
    margin: 10px 5px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1.2em;
    background: #005AA7;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s ease;
}

.button-row button:hover {
    background: #004080;
}

.results {
    margin-top: 20px;
    text-align: left;
}

.results h2 {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: #005AA7;
}

.results textarea {
    width: 100%;
    height: 300px;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1em;
    resize: none;
    box-sizing: border-box;
}

/* 增加响应式设计的媒体查询 */

/* Small devices (phones, 600px and down) */
@media screen and (max-width: 600px) {
    body, .container, .results textarea {
        padding: 10px;
    }
    h1 {
        font-size: 1.5em;
    }
    .row {
        flex-direction: column;
        align-items: flex-start;
    }
    .row div, select, .button-row button, .results textarea {
        width: 100%;
        margin: 5px 0;
    }
    .button-row button {
        font-size: 1em;
        padding: 10px;
    }
    .results textarea {
        height: 200px;
    }
}

/* Medium devices (tablets, 600px to 768px) */
@media screen and (min-width: 600px) and (max-width: 768px) {
    body, .container, .results textarea {
        padding: 20px;
    }
    h1 {
        font-size: 1.75em;
    }
    .row {
        flex-direction: row;
    }
    .row div, select, .button-row button, .results textarea {
        width: 100%;
        margin: 10px 5px;
    }
    .button-row button {
        font-size: 1.1em;
        padding: 12px 22px;
    }
    .results textarea {
        height: 250px;
    }
}

/* Large devices (desktops, 768px and up) */
@media screen and (min-width: 768px) {
    body, .container, .results textarea {
        padding: 30px;
    }
    h1 {
        font-size: 2em;
    }
    .row {
        flex-direction: row;
    }
    .row div, select, .button-row button, .results textarea {
        margin: 15px 10px;
    }
    .button-row button {
        font-size: 1.2em;
        padding: 15px 25px;
    }
    .results textarea {
        height: 300px;
    }
}