* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background: #f4f7fa;
    font-family: "Microsoft YaHei", sans-serif;
}
.site-header {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 20px 15px;
}
.site-header h1 {
    font-size: clamp(1.4rem, 3vw, 2rem);
}

/* 默认手机单列 */
.wrap {
    max-width: 1600px;
    margin: 30px auto;
    padding: 0 15px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}
.carousel-box {
    width: 100%;
}
.carousel-box h2 {
    margin-bottom: 12px;
    color: #222;
    font-size: clamp(16px, 2vw, 18px);
    text-align: center;
}

/* 电脑大屏两列并排 */
@media (min-width: 1300px) {
    .wrap {
        grid-template-columns: 1fr 1fr;
    }
}

.carousel {
    width: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
}
.carousel-list {
    display: flex;
    transition: transform 0.4s ease;
}
/* 一屏固定3张图，自适应分区宽度 */
.carousel-item {
    flex: 0 0 calc(100% / 3);
    padding: clamp(6px, 1vw, 10px);
    position: relative;
    transition: all 0.45s ease;
}

.carousel-image-wrap {
    width: 100%;
    height: clamp(130px, 16vw, 170px);
    overflow: hidden;
    border-radius: 12px;
}
.carousel-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.45s ease, filter 0.45s ease;
    border-radius: inherit;
}

/* 非焦点图片缩小变暗 */
.carousel-item:not(.center) .carousel-image-wrap img {
    transform: scale(0.75);
    filter: brightness(0.7);
}
/* 居中焦点放大1.5倍 + 边缘径向毛玻璃虚化 */
.carousel-item.center {
    z-index: 2;
}
.carousel-item.center .carousel-image-wrap img {
    transform: scale(1.5);
    filter: brightness(1.05);
    mask-image: radial-gradient(circle, rgba(0,0,0,1) 68%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: radial-gradient(circle, rgba(0,0,0,1) 68%, rgba(0,0,0,0) 100%);
    box-shadow: 0 0 22px rgba(0, 0, 0, 0.4);
}
.carousel-item.center img:hover {
    transform: scale(1.55);
}

/* 切换按钮自适应尺寸 */
.btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(32px, 5vw, 36px);
    height: clamp(32px, 5vw, 36px);
    border-radius: 50%;
    border: none;
    background: rgba(0,0,0,0.5);
    color: #fff;
    font-size: clamp(16px, 3vw, 18px);
    cursor: pointer;
    z-index: 10;
}
.prev {
    left: 10px;
}
.next {
    right: 10px;
}

/* 大图弹窗 */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 999;
}
.modal-img {
    display: block;
    max-width: 92%;
    max-height: 92vh;
    margin: 40px auto;
}
.close-btn {
    position: absolute;
    top: 15px;
    right: 25px;
    font-size: clamp(32px, 8vw, 42px);
    color: #fff;
    cursor: pointer;
}

.site-footer {
    text-align: center;
    padding: 24px 15px;
    color: #666;
    margin-top: 50px;
    font-size: clamp(13px, 2vw, 15px);
}

/* 手机紧凑优化 */
@media (max-width: 650px) {
    .wrap {
        gap: 25px;
        margin: 20px auto;
    }
}