/* ============================================
   腾隍纽扣 - Banner 轮播图样式
   ============================================ */

.main-banner {
    width: 100%;
    position: relative;
    overflow: hidden;
    background-color: #000;
}

.main-banner .swiper-slide {
    position: relative;
    width: 100%;
    height: 700px; /* 调整为行业通用的 700px 高度 */
}

/* 蒙版层：凸显文字 */
.main-banner .swiper-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.5));
    z-index: 5;
}

.main-banner .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 确保图片覆盖且不变形 */
    display: block;
}

/* 文字容器基础样式 */
.banner-content {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    z-index: 10;
    color: #ffffff;
    padding: 0 10%;
    pointer-events: none; /* 防止遮挡轮播图点击 */
}

/* 标题样式 */
.banner-title {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-size: clamp(1.5rem, 4vw, 3.5rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.2, 1, 0.3, 1) 0.3s;
}

/* 副标题样式 */
.banner-subtitle {
    font-size: clamp(0.9rem, 1.8vw, 1.45rem);
    font-weight: 400;
    line-height: 1.6;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s cubic-bezier(0.2, 1, 0.3, 1) 0.5s;
}

/* Swiper 激活时的文字动画 */
.swiper-slide-active .banner-title,
.swiper-slide-active .banner-subtitle {
    opacity: 1;
    transform: translateY(0);
}

/* 特殊颜色：黄色 */
.text-yellow {
    color: #ffde00;
}

/* 位置控制 */
.text-end .banner-content {
    text-align: right;

}

.banner-2 {
    padding-right: 5%;
}

.text-start .banner-content {
    text-align: left;
}

/* Swiper 导航按钮自定义 */
.main-banner .swiper-button-next,
.main-banner .swiper-button-prev {
    color: #fff;
    background: rgba(0, 0, 0, 0.2);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.main-banner .swiper-button-next:after,
.main-banner .swiper-button-prev:after {
    font-size: 20px;
}

.main-banner .swiper-button-next:hover,
.main-banner .swiper-button-prev:hover {
    background: var(--primary-color);
}

/* Swiper 分页指示器自定义 */
.main-banner .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: #fff;
    opacity: 0.5;
    transition: all 0.3s ease;
}

.main-banner .swiper-pagination-bullet-active {
    opacity: 1;
    width: 30px;
    border-radius: 6px;
    background: var(--primary-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .main-banner .swiper-slide {
        height: 400px; /* 手机端高度设置为 400px */
    }
    
    .banner-content {
        padding: 0 5%;
    }
    
    .banner-title {
        margin-bottom: 0.8rem;
    }

    .main-banner .swiper-button-next,
    .main-banner .swiper-button-prev {
        display: none; /* 手机端隐藏箭头，仅靠滑动 */
    }
}