/**
 * WebPlus Pro 轮播图样式
 * 符合 WebPlus Pro 标准的新版轮播图样式系统
 */

/* ===== WebPlus Pro 轮播图基础样式 ===== */
.carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    background: #fff;
}

.carousel-inner {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel-item {
    position: relative;
    display: none;
    width: 100%;
    transition: opacity 0.6s ease-in-out;
}

.carousel-item.active {
    display: block;
}

.carousel-item img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* ===== 轮播图控制按钮 ===== */
.carousel-control-prev,
.carousel-control-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0;
}

.carousel:hover .carousel-control-prev,
.carousel:hover .carousel-control-next {
    opacity: 1;
}

.carousel-control-prev {
    left: 15px;
}

.carousel-control-next {
    right: 15px;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    background: rgba(0, 97, 59, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.carousel-control-prev:focus,
.carousel-control-next:focus {
    outline: 2px solid #00613b;
    outline-offset: 2px;
}

/* ===== 轮播图指示器 ===== */
.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
    z-index: 10;
}

.carousel-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.carousel-indicator:hover {
    opacity: 1;
    transform: scale(1.2);
}

.carousel-indicator.active {
    background: #fff;
    border-color: #fff;
    opacity: 1;
}

.carousel-indicator:focus {
    outline: 2px solid #00613b;
    outline-offset: 2px;
}

/* ===== 轮播图标题和描述 ===== */
.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: #fff;
    padding: 30px 20px 20px;
    text-align: center;
}

.carousel-caption h3 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 10px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.carousel-caption p {
    font-size: 16px;
    margin: 0;
    opacity: 0.9;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* ===== 轮播图加载状态 ===== */
.carousel-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-size: 14px;
    z-index: 5;
}

.carousel-loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #00613b;
    border-radius: 50%;
    animation: carousel-spin 1s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

@keyframes carousel-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .carousel-control-prev,
    .carousel-control-next {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .carousel-control-prev {
        left: 10px;
    }
    
    .carousel-control-next {
        right: 10px;
    }
    
    .carousel-indicators {
        bottom: 15px;
        gap: 6px;
    }
    
    .carousel-indicator {
        width: 10px;
        height: 10px;
    }
    
    .carousel-caption {
        padding: 20px 15px 15px;
    }
    
    .carousel-caption h3 {
        font-size: 20px;
    }
    
    .carousel-caption p {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .carousel-control-prev,
    .carousel-control-next {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .carousel-control-prev {
        left: 8px;
    }
    
    .carousel-control-next {
        right: 8px;
    }
    
    .carousel-indicators {
        bottom: 10px;
        gap: 4px;
    }
    
    .carousel-indicator {
        width: 8px;
        height: 8px;
    }
    
    .carousel-caption {
        padding: 15px 10px 10px;
    }
    
    .carousel-caption h3 {
        font-size: 18px;
    }
    
    .carousel-caption p {
        font-size: 13px;
    }
}

/* ===== 轮播图动画效果 ===== */
@keyframes carousel-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes carousel-slide-in-right {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(0);
    }
}

@keyframes carousel-slide-in-left {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.carousel-item.fade-in {
    animation: carousel-fade-in 0.6s ease-in-out;
}

.carousel-item.slide-in-right {
    animation: carousel-slide-in-right 0.6s ease-in-out;
}

.carousel-item.slide-in-left {
    animation: carousel-slide-in-left 0.6s ease-in-out;
}

/* ===== 轮播图焦点样式 ===== */
.carousel:focus-within {
    outline: 2px solid #00613b;
    outline-offset: 2px;
}

/* ===== 高对比度模式支持 ===== */
@media (prefers-contrast: high) {
    .carousel-control-prev,
    .carousel-control-next {
        background: rgba(0, 0, 0, 0.8);
        border: 2px solid #fff;
    }
    
    .carousel-indicator {
        border: 2px solid #fff;
    }
    
    .carousel-indicator.active {
        background: #fff;
    }
    
    .carousel-caption {
        background: rgba(0, 0, 0, 0.9);
    }
}

/* ===== 减少动画模式支持 ===== */
@media (prefers-reduced-motion: reduce) {
    .carousel-item {
        transition: none;
    }
    
    .carousel-control-prev,
    .carousel-control-next,
    .carousel-indicator {
        transition: none;
    }
    
    .carousel-item.fade-in,
    .carousel-item.slide-in-right,
    .carousel-item.slide-in-left {
        animation: none;
    }
    
    .carousel-loading::after {
        animation: none;
    }
}

/* ===== 轮播图错误状态 ===== */
.carousel-error {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #dc3545;
    font-size: 14px;
    text-align: center;
    z-index: 5;
}

.carousel-error::before {
    content: '⚠️';
    display: block;
    font-size: 24px;
    margin-bottom: 10px;
}

/* ===== 轮播图无障碍支持 ===== */
.carousel[aria-label] {
    /* 为屏幕阅读器提供标签 */
}

.carousel-item[aria-hidden="true"] {
    /* 隐藏非活动项目 */
}

.carousel-control-prev[aria-label],
.carousel-control-next[aria-label] {
    /* 为控制按钮提供标签 */
}

.carousel-indicator[aria-label] {
    /* 为指示器提供标签 */
}