*{box-sizing:border-box}body{margin:0;background:#f3f4f6;color:#111827;font-family:Arial,sans-serif}.card{max-width:650px;margin:70px auto;padding:28px;background:#fff;border-radius:14px;box-shadow:0 8px 30px #0001}h1{margin-top:0}input{width:100%;padding:14px;margin:10px 0;border:1px solid #d1d5db;border-radius:8px;font-size:15px}button{padding:12px 18px;border:0;border-radius:8px;background:#111827;color:#fff;cursor:pointer}.muted,.note{color:#6b7280}.result{display:flex;gap:8px;margin-top:18px}.result input{margin:0}.err{color:#b91c1c}.watch{max-width:1000px;margin:25px auto;padding:12px}.playerWrap{position:relative;background:#000;aspect-ratio:16/9}.playerWrap video{width:100%;height:100%;display:block}.ad{display:none;position:absolute;inset:0;background:#000b;align-items:center;justify-content:center}.ad.show{display:flex}.adbox{width:min(420px,90%);background:#fff;padding:28px;border-radius:12px;text-align:center}.adbox small{color:#6b7280}.back{display:inline-block;margin-top:15px;color:#374151;text-decoration:none}@media(max-width:650px){.card{margin:20px 12px}.watch{margin:10px 0;padding:0}.result{display:block}.result button{width:100%;margin-top:8px}.back{padding:12px}}