/**
 * Nevsin Carousel Frontend Styles
 * Version: 1.0.0
 */

/* ========== 基础容器 ========== */
.nevsin-carousel-wrap {
    position: relative;
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
    --nevsin-height: auto;
    --nevsin-mobile-height: auto;
}

.nevsin-carousel {
    position: relative;
    width: 100%;
    height: var(--nevsin-height);
    min-height: 200px; /* 兜底高度，防止 JS 未执行时容器为 0 高度 */
    overflow: hidden;
    border-radius: 0;
}

.nevsin-carousel-track {
    position: relative;
    width: 100%;
    height: 100%;
}

/* ========== 单张幻灯片 ========== */
.nevsin-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
    z-index: 1;
}

.nevsin-slide.nevsin-slide-active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.nevsin-slide-image-wrap {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.nevsin-slide-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 懒加载占位 */
img.nevsin-slide-img[loading="lazy"] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: nevsin-shimmer 1.5s infinite;
}

@keyframes nevsin-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.nevsin-slide-img.nevsin-loaded {
    animation: none;
    background: none;
}

/* ========== 遮罩层 ========== */
.nevsin-slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.5) 100%);
    pointer-events: none;
}

/* ========== 内容区 ========== */
.nevsin-slide-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    box-sizing: border-box;
    z-index: 3;
    pointer-events: none;
}

.nevsin-slide-content-inner {
    max-width: 700px;
    text-align: center;
    pointer-events: auto;
}

/* 内容位置变体 */
.nevsin-content-left .nevsin-slide-content {
    justify-content: flex-start;
    text-align: left;
}
.nevsin-content-left .nevsin-slide-content-inner {
    text-align: left;
}
.nevsin-content-right .nevsin-slide-content {
    justify-content: flex-end;
    text-align: right;
}
.nevsin-content-right .nevsin-slide-content-inner {
    text-align: right;
}
.nevsin-content-bottom-left .nevsin-slide-content {
    align-items: flex-end;
    justify-content: flex-start;
    text-align: left;
}
.nevsin-content-bottom-left .nevsin-slide-content-inner {
    text-align: left;
}
.nevsin-content-bottom-right .nevsin-slide-content {
    align-items: flex-end;
    justify-content: flex-end;
    text-align: right;
}
.nevsin-content-bottom-right .nevsin-slide-content-inner {
    text-align: right;
}

/* ========== 标题 ========== */
.nevsin-slide-title {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 15px 0;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.6s ease 0.2s, opacity 0.6s ease 0.2s;
}

.nevsin-slide-active .nevsin-slide-title {
    transform: translateY(0);
    opacity: 1;
}

/* ========== 概要 ========== */
.nevsin-slide-summary {
    color: rgba(255,255,255,0.95);
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0 0 20px 0;
    text-shadow: 0 1px 5px rgba(0,0,0,0.5);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.6s ease 0.4s, opacity 0.6s ease 0.4s;
}

.nevsin-slide-active .nevsin-slide-summary {
    transform: translateY(0);
    opacity: 1;
}

/* ========== 按钮 ========== */
.nevsin-slide-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    background: #fff;
    color: #333;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.6s ease 0.6s, opacity 0.6s ease 0.6s, background 0.3s, color 0.3s, box-shadow 0.3s;
}

.nevsin-slide-active .nevsin-slide-btn {
    transform: translateY(0);
    opacity: 1;
}

.nevsin-slide-btn:hover {
    background: #2271b1;
    color: #fff;
    box-shadow: 0 6px 20px rgba(34, 113, 177, 0.4);
    transform: translateY(-2px);
}

.nevsin-btn-arrow {
    transition: transform 0.3s;
    font-size: 1.2em;
}

.nevsin-slide-btn:hover .nevsin-btn-arrow {
    transform: translateX(4px);
}

/* ========== 左右箭头 ========== */
.nevsin-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s ease;
    color: #333;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    opacity: 0;
}

.nevsin-carousel:hover .nevsin-arrow {
    opacity: 1;
}

.nevsin-arrow:hover {
    background: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.nevsin-arrow-prev {
    left: 20px;
}

.nevsin-arrow-next {
    right: 20px;
}

/* ========== 指示点 ========== */
.nevsin-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.nevsin-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    border: 2px solid rgba(255,255,255,0.8);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.nevsin-dot:hover {
    background: rgba(255,255,255,0.8);
}

.nevsin-dot.nevsin-dot-active {
    background: #fff;
    width: 30px;
    border-radius: 6px;
}

/* ========== 动画效果 ========== */

/* Slide 效果 */
.nevsin-effect-slide .nevsin-slide {
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.6s ease;
}
/* 默认（next方向）：非激活幻灯片在右侧 */
.nevsin-effect-slide .nevsin-slide:not(.nevsin-slide-active):not(.nevsin-slide-prev) {
    transform: translateX(100%);
}
/* next 方向：退场幻灯片向左滑出 */
.nevsin-effect-slide.nevsin-dir-next .nevsin-slide.nevsin-slide-prev {
    transform: translateX(-100%);
    opacity: 0;
    visibility: visible;
}
/* prev 方向：退场幻灯片向右滑出 */
.nevsin-effect-slide.nevsin-dir-prev .nevsin-slide.nevsin-slide-prev {
    transform: translateX(100%);
    opacity: 0;
    visibility: visible;
}
/* prev 方向：入场幻灯片从左侧滑入 */
.nevsin-effect-slide.nevsin-dir-prev .nevsin-slide:not(.nevsin-slide-active):not(.nevsin-slide-prev) {
    transform: translateX(-100%);
}
.nevsin-effect-slide .nevsin-slide.nevsin-slide-active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
}

/* Fade 效果 */
.nevsin-effect-fade .nevsin-slide {
    transform: none;
}

/* Zoom 效果 */
.nevsin-effect-zoom .nevsin-slide {
    transform: scale(1.2);
}
.nevsin-effect-zoom .nevsin-slide.nevsin-slide-active {
    transform: scale(1);
}
.nevsin-effect-zoom .nevsin-slide-img {
    transition: transform 6s ease;
}
.nevsin-effect-zoom .nevsin-slide.nevsin-slide-active .nevsin-slide-img {
    transform: scale(1.1);
}

/* Flip 效果 */
.nevsin-effect-flip .nevsin-carousel {
    perspective: 1000px;
}
.nevsin-effect-flip .nevsin-slide {
    transform: rotateY(90deg);
    transform-origin: center;
    backface-visibility: hidden;
}
.nevsin-effect-flip .nevsin-slide.nevsin-slide-active {
    transform: rotateY(0);
}

/* Ken Burns 效果 */
.nevsin-effect-kenburns .nevsin-slide-img {
    transform: scale(1);
}
.nevsin-effect-kenburns .nevsin-slide.nevsin-slide-active .nevsin-slide-img {
    animation: nevsin-kenburns 8s ease-out forwards;
}
@keyframes nevsin-kenburns {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.15) translate(-2%, -2%); }
}

/* Cube 效果 */
.nevsin-effect-cube .nevsin-carousel {
    perspective: 1200px;
}
.nevsin-effect-cube .nevsin-carousel-track {
    transform-style: preserve-3d;
}
.nevsin-effect-cube .nevsin-slide {
    transform: rotateY(90deg) translateZ(50%);
    transform-origin: left center;
}
.nevsin-effect-cube .nevsin-slide.nevsin-slide-prev {
    transform: rotateY(-90deg) translateZ(50%);
    transform-origin: right center;
    opacity: 0;
}
.nevsin-effect-cube .nevsin-slide.nevsin-slide-active {
    transform: rotateY(0) translateZ(0);
}

/* ========== 进度条 ========== */
.nevsin-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: rgba(255,255,255,0.7);
    z-index: 11;
    width: 0;
    transition: none;
}

/* ========== 响应式 - 手机端 ========== */
@media (max-width: 768px) {
    .nevsin-carousel-wrap[data-mobile-height] .nevsin-carousel {
        height: var(--nevsin-mobile-height, auto);
    }

    .nevsin-slide-content {
        padding: 20px;
    }

    .nevsin-slide-title {
        font-size: 1.4rem;
        margin-bottom: 10px;
    }

    .nevsin-slide-summary {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .nevsin-slide-btn {
        padding: 10px 22px;
        font-size: 0.9rem;
    }

    .nevsin-arrow {
        width: 36px;
        height: 36px;
    }

    .nevsin-arrow-prev {
        left: 10px;
    }

    .nevsin-arrow-next {
        right: 10px;
    }

    .nevsin-arrow svg {
        width: 18px;
        height: 18px;
    }

    .nevsin-dots {
        bottom: 12px;
        gap: 6px;
    }

    .nevsin-dot {
        width: 8px;
        height: 8px;
    }

    .nevsin-dot.nevsin-dot-active {
        width: 20px;
    }
}

/* ========== 响应式 - 小屏手机 ========== */
@media (max-width: 480px) {
    .nevsin-slide-content {
        padding: 15px;
    }

    .nevsin-slide-title {
        font-size: 1.2rem;
    }

    .nevsin-slide-summary {
        font-size: 0.85rem;
        -webkit-line-clamp: 3;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .nevsin-slide-btn {
        padding: 8px 18px;
        font-size: 0.85rem;
    }
}

/* ========== 防止溢出 ========== */
.nevsin-carousel * {
    box-sizing: border-box;
}

.nevsin-carousel-wrap {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.nevsin-slide-content-inner {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}