.biggerContainer {
    max-width: 1200; 
    margin: 0 auto;
    padding-left: 80px;
    padding-right: 80px;
}
.well {
    min-height: 20px;
    padding: 19px;
    margin-bottom: 20px;
    background-color: #f5f5f5;
    border: 1px solid #e3e3e3;
    border-radius: 4px;
    -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .05);
            box-shadow: inset 0 1px 1px rgba(0, 0, 0, .05);
}

.tab-btn .check-icon {
    display: none;
    font-size: 14px;
    color: white;
}

.tab-btn.active .check-icon {
    display: inline;
}
.tab-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
.tab-btn:not(.active) {
    transform: scale(0.85);
    opacity: 0.7;
}
.tab-btn {
    padding: 10px 20px;
    border: 1px solid #e3e3e3;
    color: white;
    background:#badaf9;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s;
    
    
}
.tab-btn.active {
    color: rgb(39, 39, 39);
    
    border-bottom: none;
    background: #f5f5f5;
    font-weight: bold;
}
.payment-tab {
    display: none;
}
.payment-tab.active {
    display: block;
}

.tab-buttons-wrapper {
    margin-bottom: -21px; /* 貼住 .well 上框線 */
}