main {
    background-image: url(../IMG/Meet01.jpg);
    background-size: cover;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}



a {
    text-decoration: none;
    color: #4d4d4d;
}

body {
    font-family: 'Segoe UI', 'Microsoft JhengHei', sans-serif;
    background: var(--bg-gradient);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
}

.container {
    background: rgba(255, 255, 255, 0.651);
    margin-left: 50%;
    margin-top: 10%;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 400px;
    border: 1px solid #000;
    /* 頂部紫色線條 */
}

@media screen and (max-width: 768px) {
    main {
        /* 覆寫背景圖片路徑 */
        background-image: url(../IMG/Meet02.jpg);
    }

    .container {
        /* border: 5px solid #000; */
        margin-left: 0;
        margin-top: 15%;
    }
}

h2 {
    margin: 0 0 25px 0;
    color: #333;
    font-size: 24px;
    text-align: center;
    font-family: "標楷體";
    font-weight: 1000;
}

.input-group {
    margin-bottom: 25px;
    text-align: left;
}

label.field-label {
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
    color: #333;
    font-weight: bold;
}

label

/* 必填星號 */
.required::after {
    content: " *";
    color: #d93025;
}

/* 姓名輸入框樣式 */
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #000000;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
    outline: none;
    transition: 0.2s;
}

input[type="text"]:focus {
    border-color: #000;
    border-width: 2px;
    padding: 11px;
    color: blue;
}

/* --- 簽到/簽退 選項按鈕化設計 --- */
.radio-options {
    display: flex;
    gap: 15px;
    /* 按鈕之間的距離 */
}

/* 隱藏原本醜醜的圓點 */
.radio-options input[type="radio"] {
    display: none;
}

/* 設計自訂的按鈕外觀 */
.radio-btn-label {
    flex: 1;
    /* 兩個按鈕平均分配寬度 */
    padding: 15px;
    border: 2px solid #dadce0;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    font-weight: bold;
    color: #555;
    transition: all 0.2s ease;
    background-color: #ffffffaf;
    font-family: "標楷體";
    border: 1.6px solid #000;
}

/* 當被選中時的樣式 */
.radio-options input[type="radio"]:checked+.radio-btn-label {
    background-color: #83a3fc;
    color: var(--primary-color);
    box-shadow: 0 4px 6px rgba(103, 58, 183, 0.2);
}

.radio-btn-label:hover {
    background-color: #8766d6de;
}

/* 送出按鈕 */
button[type="submit"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #000;
    color: #000;
    font-size: 16px;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    background: #ffffffaf;
}

button[type="submit"]:hover {
    background-color: #8766d6de;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* 感謝訊息 */
#thank-you-message {
    display: none;
    text-align: center;
    margin-top: 20px;
}

.title {
    position: relative;
}

img {
    width: 40px;
    height: 40px;
    display: inline-block;
    position: absolute;
    left: -20px
}