.kmj-video-section{max-width:720px}
.kmj-video-frame{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;border:1px solid rgba(234,209,138,.24);border-radius:8px;background:#08120f}
.kmj-video-preview{display:block;position:absolute;inset:0;width:100%;height:100%;padding:0;border:0;background:#08120f;cursor:pointer}
.kmj-video-preview img{display:block;width:100%;height:100%;object-fit:cover}
.kmj-video-play{position:absolute;top:50%;left:50%;display:grid;place-items:center;transform:translate(-50%,-50%);width:64px;height:44px;border-radius:12px;background:#b92323;color:white;font:24px/1 sans-serif;box-shadow:0 2px 12px #0008}
.kmj-video-preview:hover .kmj-video-play{background:#e02828}
.kmj-video-preview:focus-visible{outline:3px solid #e6c66d;outline-offset:-4px}
.kmj-video-frame iframe{display:block;position:absolute;inset:0;width:100%;height:100%;border:0}
.kmj-video-caption{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px 12px;margin:8px 0 0!important;font-size:12px;color:#b6c1b6;overflow-wrap:anywhere}
.kmj-video-caption a{color:#ead18a;text-underline-offset:3px}
.about-page .rule-video-library{margin-top:24px}
.rule-video-library h3{margin:0 0 12px;font-size:17px;color:#fff7dc}
.rule-video-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;align-items:start}
.rule-video-list details{min-width:0;border:1px solid rgba(234,209,138,.24);border-radius:8px;background:rgba(255,250,240,.05)}
.rule-video-list summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:10px 14px;list-style:none;cursor:pointer;font-size:14px;font-weight:700;color:#fff4cc}
.rule-video-list summary::-webkit-details-marker{display:none}
.rule-video-list summary::after{content:'▶';font-size:11px;color:#ead18a}
.rule-video-list details[open]>summary::after{content:'▾'}
.rule-video-list summary:focus-visible{outline:2px solid #e6c66d;outline-offset:2px}
.rule-video-list [data-rule-video]{padding:0 12px 12px}
@media(max-width:600px){.rule-video-list{grid-template-columns:1fr}}