:root{--blue:#1479c9;--deep:#09669f;--pale:#edf6ff;--line:#cbd9e8;--ink:#10243b;--muted:#60748d;--red:#e11d48}
*{box-sizing:border-box}
body{margin:0;background:#f3f7fb;color:var(--ink);font-family:"Microsoft JhengHei",system-ui,sans-serif}
button,input{font:inherit}
.hidden{display:none!important}
img{max-width:100%}

.videos-header{background:linear-gradient(135deg,#1387c7,#0a5e9c);padding:22px 16px;color:#fff}
.videos-header-inner{width:min(1100px,100%);margin:0 auto}
.videos-header h1{margin:0;font-size:22px}

.videos-main{width:min(1100px,calc(100% - 32px));margin:20px auto}

.videos-filter-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:14px 18px;margin-bottom:18px}
.videos-search-label{display:flex;align-items:center;gap:10px;padding:2px 14px;border:1px solid #bcd2e8;border-radius:12px;background:#f9fbfe}
.videos-search-label input{flex:1;border:0;outline:0;padding:12px 0;background:transparent;font-size:15px}

.videos-tag-bar{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.videos-tag-btn{padding:8px 16px;border-radius:99px;border:1px solid var(--line);background:#f9fbfe;color:var(--deep);font-weight:700;font-size:13px;cursor:pointer}
.videos-tag-btn.active{color:#fff;background:linear-gradient(135deg,var(--blue),var(--deep));border-color:transparent;box-shadow:0 6px 14px #1479c93a}

.videos-empty-state{height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);text-align:center}
.videos-empty-state h3{margin:10px 0 0}
.videos-empty-state p{margin:8px}
.grid-icon{font-size:44px}
.spinner{width:32px;height:32px;border:3px solid #dbeaf6;border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.videos-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column}

.video-frame{position:relative;width:100%;padding-top:177.77%;background:#0c1a2a;cursor:pointer}
.video-frame iframe,.video-frame .video-thumb-wrap{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-thumb-wrap{cursor:pointer}
.video-thumb{width:100%;height:100%;object-fit:cover;display:block}
.video-play-btn{position:absolute;inset:0;margin:auto;width:70px;height:70px;border-radius:50%;background:rgba(16,36,59,.65);color:#fff;font-size:26px;display:flex;align-items:center;justify-content:center;border:2px solid rgba(255,255,255,.85);pointer-events:none}
.video-frame-error{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;background:#3a4a5c;font-weight:700;padding:12px;font-size:14px}

.video-info{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.video-name{margin:0;font-size:17px;font-weight:900;line-height:1.4}
.video-note{margin:0;padding:10px 12px;border-radius:9px;background:var(--pale);color:var(--deep);font-size:13px;line-height:1.5}
.video-buy-btn{margin-top:auto;display:block;text-align:center;padding:13px;border-radius:10px;color:#fff;background:linear-gradient(135deg,var(--red),#b8123f);font-weight:900;text-decoration:none;font-size:15px}
.video-buy-btn:hover{filter:brightness(1.05)}

.line-footer{width:min(1100px,calc(100% - 32px));margin:32px auto 40px;padding:26px 18px;border-radius:16px;background:#fff;border:1px solid var(--line);text-align:center}
.line-qr{width:150px;height:150px;border-radius:10px}
.line-footer p{margin:12px 0 0;font-weight:800;color:var(--deep)}

@media(max-width:600px){
  .videos-header h1{font-size:19px}
  .videos-grid{grid-template-columns:1fr;gap:16px}
}