.slidercaptcha {
    margin: 0 auto;
    width: 282px; /* 280px canvas + 2px border */
    height: auto; /* 自适应高度，避免多余空白 */
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.125);
    margin-top: 20px;
    padding: 0;
}

.slidercaptcha .card-body {
    padding: 1rem;
}

.slidercaptcha canvas:first-child {
    border-radius: 4px;
    border: 1px solid #e6e8eb;
    display: block;
    margin: 0 auto; /* 确保canvas居中 */
}

.slidercaptcha.card .card-header {
    background-image: none;
    background-color: rgba(0, 0, 0, 0.03);
}

.slidercaptcha.card .card-header.bg-dark {
    background-color: #343a40 !important;
}

.slidercaptcha.card .card-header .slidercaptcha-title {
    color: rgba(0, 0, 0, 0.85);
    font-size: 1rem;
    margin: 0;
}

.slidercaptcha.card .card-footer {
    background-color: transparent;
    border-top: transparent;
}

.refreshIcon {
    font-size: 16px;
    cursor: pointer;
    position: absolute;
    right: 5px;
    top: 5px;
    z-index: 10;
    color: rgba(0, 0, 0, .5);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.refreshIcon:hover {
    color: #723031;
}

.slidercaptcha .card-header {
    padding: .75rem 1.25rem;
    margin-bottom: 0;
    background-color: rgba(0,0,0,.03);
    border-bottom: 1px solid rgba(0,0,0,.125);
}

.slidercaptcha .card-footer {
    padding: .75rem 1.25rem;
    color: #6c757d;
    margin-top: 1rem;
    background-color: rgba(0,0,0,.03);
    border-top: 1px solid rgba(0,0,0,.125);
}

.sliderContainer {
    position: relative;
    text-align: center;
    width: 280px; /* 与canvas宽度保持一致 */
    height: 40px;
    line-height: 40px;
    margin: 15px auto 0 auto; /* 居中对齐 */
    background: #f7f9fa;
    color: #45494c;
    border: 1px solid #e4e7eb;
    border-radius: 4px;
}

.sliderContainer_active .slider {
    height: 38px;
    top: -1px;
    border: 1px solid #1991FA;
}

.sliderContainer_active .sliderMask {
    height: 38px;
    border-width: 1px;
}

.sliderContainer_success .slider {
    height: 38px;
    top: -1px;
    border: 1px solid #52CCBA;
    background-color: #52CCBA !important;
}

.sliderContainer_success .sliderMask {
    height: 38px;
    border: 1px solid #52CCBA;
    background-color: #D2F4EF;
}

.sliderContainer_success .sliderIcon:before {
    content: "✓";
}

.sliderContainer_fail .slider {
    height: 38px;
    top: -1px;
    border: 1px solid #f57a7a;
    background-color: #f57a7a !important;
}

.sliderContainer_fail .sliderMask {
    height: 38px;
    border: 1px solid #f57a7a;
    background-color: #fce1e1;
}

.sliderContainer_fail .sliderIcon:before {
    content: "✗";
}

.sliderContainer_active .sliderText, .sliderContainer_success .sliderText, .sliderContainer_fail .sliderText {
    display: none;
}

.sliderMask {
    position: absolute;
    left: 0;
    top: 0;
    height: 40px;
    border: 0 solid #1991FA;
    background: #D1E9FE;
    border-radius: 4px;
}

.slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 40px;
    background: #fff;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: background .2s linear;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider:hover {
    background: #1991FA;
}

.slider:hover .sliderIcon {
    color: #fff;
}

.sliderText {
    position: relative;
}

.sliderIcon {
    font-size: 1rem;
    color: #666;
}

.sliderbg {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: #f7f9fa;
}

.block {
    position: absolute;
    left: 0;
    top: 0;
}

.sliderContainer:hover .refreshIcon {
    display: block;
}

.sliderContainer.sliderContainer_fail .refreshIcon {
    display: block;
}

/* 手机端优化 */
@media (max-width: 768px) {
    .slidercaptcha {
        width: 95%;
        max-width: 282px;
        margin: 15px auto;
    }
    
    .sliderContainer {
        width: 100%;
        max-width: 280px;
    }
    
    .slider {
        user-select: none;
        -webkit-user-select: none;
        -webkit-touch-callout: none;
    }
    
    .slidercaptcha canvas:first-child {
        max-width: 100%;
        height: auto;
    }
}