/* ========== Preview section / Carousel styles ========== */
/* 只用于 features 和 solutions 目录的轮播图展示区域 */

/* 依赖：需先加载 bfk.css（提供 CSS 变量定义） */

/* ---------- Preview section (轮播图展示区域) ---------- */
.bfk-preview-section {
    padding-top: 80px;
    padding-bottom: 60px;
}

.bfk-preview-section .text-center {
    margin-top: 32px;
}

.bfk-preview-section .ud-main-btn {
    margin: 0 8px;
}

/* ---------- Preview 标题 ---------- */
.bfk-preview-title {
    max-width: 800px;
    margin: 0 auto 36px auto;
    text-align: center;
}

.bfk-preview-title h2 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 6px;
    color: var(--bfk-text-primary);
}

.bfk-preview-title p {
    font-size: 15px;
    color: var(--bfk-muted);
    margin: 0;
}

/* ---------- Preview 内容容器 ---------- */
.bfk-preview-content {
    max-width: 1100px;
    margin: 0 auto;
}

/* ---------- Carousel tabs - 移动端不换行 ---------- */
.bfk-preview-section .bfk-carousel-tabs {
    display: flex;
    gap: 6px;
    justify-content: center;
    flex-wrap: nowrap;
    margin-bottom: 24px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 16px;
}

.bfk-preview-section .bfk-tab-btn {
    padding: 8px 18px;
    font-size: 14px;
    border: 1px solid var(--bfk-border);
    border-radius: 20px;
    background: var(--bfk-white);
    color: var(--bfk-muted);
    white-space: nowrap;
    transition: all 0.2s ease;
}

.bfk-preview-section .bfk-tab-btn:hover {
    transform: translateY(-1px);
    background: var(--bfk-white);
    box-shadow: 0px 8px 25px rgba(48, 86, 211, 0.15);
}

.bfk-preview-section .bfk-tab-btn.active {
    background-color: var(--bfk-primary);
    border-color: var(--bfk-primary);
    color: var(--bfk-white);
    font-weight: 600;
}

/* ---------- Carousel inner ---------- */
.bfk-preview-section .carousel-inner {
    border-radius: var(--bfk-radius);
    overflow: hidden;
}

.bfk-preview-section .carousel-item {
    padding: 0;
}

/* ---------- Shot block - 移动端简化 ---------- */
.bfk-preview-section .bfk-shot-block {
    border: none;
    box-shadow: none;
    padding: 0;
    background: transparent;
}

.bfk-preview-section .bfk-shot-head {
    padding: 0 0 12px 0;
    text-align: center;
}

.bfk-preview-section .bfk-shot-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--bfk-text-primary);
}

.bfk-preview-section .bfk-shot-sub {
    display: none;
}

/* ---------- Shot block ---------- */
.bfk-shot-block {
    border: 1px solid var(--bfk-border);
    border-radius: var(--bfk-radius);
    background: var(--bfk-white);
    box-shadow: var(--bfk-shadow-sm);
    padding: 14px;
}

.bfk-shot-head {
    padding-bottom: 12px;
}

.bfk-shot-title {
    font-size: 16px;
    line-height: 24px;
    font-weight: 700;
    color: var(--bfk-text-tertiary);
}

.bfk-shot-sub {
    margin-top: 6px;
    font-size: 13px;
    line-height: 20px;
    color: var(--bfk-text-secondary);
}

/* ---------- Mobile grid ---------- */
.bfk-preview-section .bfk-mobile-grid {
    margin-top: 16px;
    gap: 10px;
}

/* ---------- Mobile grid ---------- */
.bfk-mobile-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.bfk-mobile-item {
    margin: 0;
    border: 1px solid var(--bfk-border);
    border-radius: var(--bfk-radius);
    overflow: hidden;
    background: var(--bfk-white);
}

.bfk-mobile-item img {
    width: 100%;
    height: 460px;
    object-fit: contain;
    object-position: center;
    background: var(--bfk-white);
    display: block;
}

.bfk-mobile-item figcaption {
    padding: 8px 12px;
    font-size: 13px;
    line-height: 18px;
    color: var(--bfk-text-secondary);
    text-align: center;
}

.bfk-preview-section .bfk-mobile-item {
    border: none;
    border-radius: var(--bfk-radius);
    background: var(--bfk-white);
    box-shadow: var(--bfk-shadow-sm);
    overflow: hidden;
}

.bfk-preview-section .bfk-mobile-item figcaption {
    padding: 8px 12px;
    font-size: 13px;
    line-height: 18px;
    color: var(--bfk-text-secondary);
    text-align: center;
}

/* ---------- 轮播图内的图片 ---------- */
.bfk-preview-section .bfk-mobile-item img,
.bfk-preview-section .bfk-shot-block img,
.bfk-preview-section .bfk-shot-block .bfk-media-xl {
    border: none;
    border-radius: var(--bfk-radius);
    box-shadow: var(--bfk-shadow-sm);
    background: var(--bfk-white);
    max-width: 100%;
}

/* ---------- 去掉轮播控制箭头 ---------- */
.bfk-preview-section .carousel-control-prev,
.bfk-preview-section .carousel-control-next {
    display: none;
}

/* ---------- 轮播指示器 - 隐藏 ---------- */
.bfk-preview-section .carousel-indicators {
    display: none;
}

/* ---------- 媒体尺寸 ---------- */
.bfk-media-xl {
    width: 100%;
    height: auto;
    max-height: 550px;
    display: block;
    object-fit: contain;
    object-position: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 991px) {
    .bfk-preview-section {
        padding-top: 70px;
        padding-bottom: 50px;
    }

    .bfk-media-xl {
        height: 400px;
    }

    .bfk-mobile-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bfk-mobile-item img {
        height: 340px;
    }

    .bfk-preview-section .bfk-mobile-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bfk-preview-section .bfk-mobile-item img {
        height: 340px;
    }
}

@media (max-width: 767px) {
    .bfk-preview-section {
        padding-top: 50px;
        padding-bottom: 40px;
    }

    .bfk-media-xl {
        height: 350px;
    }

    .bfk-mobile-grid {
        grid-template-columns: 1fr;
    }

    .bfk-mobile-item img {
        height: 420px;
    }

    .bfk-preview-title h2 {
        font-size: 24px;
    }

    .bfk-preview-section .bfk-carousel-tabs {
        gap: 4px;
        padding: 0 12px;
    }

    .bfk-preview-section .bfk-tab-btn {
        padding: 6px 14px;
        font-size: 13px;
    }

    .bfk-preview-section .bfk-mobile-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .bfk-preview-section .bfk-mobile-item img {
        height: 420px;
    }

    .bfk-preview-section .bfk-mobile-item figcaption {
        padding: 6px 10px;
        font-size: 12px;
    }
}