.install-video-guide{margin:30px 0 36px;padding:24px;background:#f8fafc;border-radius:20px;display:grid;grid-template-columns:minmax(220px,320px) minmax(0,1fr);gap:28px;align-items:center}
.install-video-player{min-width:0;display:flex;justify-content:center}
.install-video-player video{display:block;width:100%;height:auto;aspect-ratio:830/2020;max-height:800px;object-fit:contain;background:#171c26;border-radius:16px;box-shadow:0 8px 28px #1e293b14}
.install-video-copy{min-width:0}
.install-video-copy .video-label{display:block;font-size:12px;font-weight:600;color:#3b82f6;margin-bottom:8px}
.install-video-copy h3{font-size:24px;line-height:1.4;margin:0 0 12px;color:#191f28}
.install-video-copy>p{font-size:14px;color:#6b7684;line-height:1.7;margin-bottom:20px}
.video-chapters{display:grid;gap:7px;margin:0 0 18px;padding:0;list-style:none}
.video-chapters button{width:100%;display:flex;align-items:center;gap:12px;text-align:left;border:0;border-radius:10px;background:#fff;color:#4e5968;padding:11px 13px;font-size:14px;line-height:1.5}
.video-chapters time{flex:none;color:#8b95a1;font-size:12px;font-variant-numeric:tabular-nums}
.video-chapters button:hover{background:#edf4ff;color:#2563eb}
.video-chapters button[aria-current="step"]{background:#e8f1ff;color:#2563eb;font-weight:600}
.video-chapters button[aria-current="step"] time{color:#3b82f6}
.install-video-copy .video-detail-note{font-size:12px;color:#8b95a1;margin:14px 0;line-height:1.7}
.install-video-copy .video-download{font-size:13px;color:#3b82f6;text-underline-offset:4px}
.video-status{font-size:12px;line-height:1.6;color:#6b7684;margin:10px 0 0}
.video-status:empty{display:none}
@media(max-width:700px){.install-video-guide{grid-template-columns:minmax(0,1fr);padding:18px;gap:24px}.install-video-player video{max-width:320px}.install-video-copy h3{font-size:21px}.video-chapters{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.video-chapters button{padding:10px;gap:7px;font-size:12px}.video-chapters time{font-size:10px}}
@media(max-width:370px){.install-video-guide{padding:12px}.video-chapters{grid-template-columns:minmax(0,1fr)}}