/* ==========================================================================
   视频库（imageslist.html / {pboot:videolibrary}）
   - 双列 Hero：左 栏目标题，右 企业宣传片（16:9，.vid-thumb 蒙层弹窗播放）
   - 产品视频 / 工厂环境选项卡：复用 .kb-tabs*（main.js 的 [data-kb-tabs] 通用绑定）
   - 视频卡片复用全站 .case-grid / .case-card / .vid-thumb / .yt-preview
   ========================================================================== */

.video-hero {
    position: relative;
    background:
        radial-gradient(ellipse 70% 60% at 75% 30%, rgba(15, 47, 92, .28) 0%, transparent 65%),
        radial-gradient(circle at 15% 90%, rgba(15, 47, 92, .18) 0%, transparent 60%),
        linear-gradient(140deg, #061426 0%, #0f2f5c 50%, #164479 100%);
    color: #fff;
    padding: 72px 0;
    overflow: hidden;
}

/* 与 page-hero 同款网格纹理 */
.video-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60'><g fill='none' stroke='%23ffffff' stroke-width='0.4' opacity='0.10'><path d='M0 30h60M30 0v60'/><circle cx='30' cy='30' r='1.5' fill='%23ffffff' opacity='0.14'/></g></svg>");
    background-size: 60px 60px;
}

.vh-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: center;
}

.vh-title {
    color: #fff;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 14px;
}

.vh-sub {
    color: rgba(255, 255, 255, .78);
    font-size: 17px;
    line-height: 1.7;
    margin: 0;
    max-width: 480px;
}

.vh-media { min-width: 0; }

.vh-frame {
    border-radius: 14px;
    box-shadow: 0 24px 60px rgba(3, 10, 20, .45);
}

.video-library-section { padding: 64px 0 88px; }

.vl-empty {
    text-align: center;
    color: var(--color-gray-600, #6b7280);
    padding: 56px 0;
    margin: 0;
}

@media (max-width: 900px) {
    .video-hero { padding: 56px 0; }
    .vh-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* 移动端全局 .vid-thumb 退成 4:3，宣传片保持 16:9 */
@media (max-width: 768px) {
    .vh-frame { aspect-ratio: 16 / 9; }
}