.custom-sidebar {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 0;
}
.custom-sidebar .contact-btn {
    width: 85px;
    height: 75px;
    background-color: #666666;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    text-decoration: none;
    border-left: 4px solid #ff0000;
    transition: all 0.3s ease;
    box-sizing: border-box;
}
.custom-sidebar .contact-btn:hover {
    background-color: #444444;
}
.custom-sidebar .contact-btn svg {
    width: 24px;
    height: 24px;
    fill: #ffffff;
    margin-bottom: 6px;
}
.custom-sidebar .contact-btn span {
    font-size: 12px;
    font-family: Arial, sans-serif;
    font-weight: 500;
}
/* 各个按钮独特的边框颜色 */
.custom-sidebar .contact-btn.whatsapp { border-left-color: #25D366; }
.custom-sidebar .contact-btn.tel { border-left-color: #007AFF; }
.custom-sidebar .contact-btn.email { border-left-color: #D44638; }
.custom-sidebar .contact-btn.inquiry { border-left-color: #ff9900; }