*{box-sizing:border-box}html,body{margin:0;background:#182e30;color:#163736;font-family:"Segoe UI","Microsoft YaHei",sans-serif}main{width:100%;max-width:540px;margin:auto;background:#f2f6df;min-height:100vh;display:flex;flex-direction:column}header{display:flex;justify-content:space-between;align-items:center;margin:0 20px;padding:14px 0;border-bottom:1px solid #acbca7}header b{font:italic 900 22px Arial;letter-spacing:-1.4px}header i{color:#dd6433}header span,small,.caption,em{font-size:11px;font-weight:800;letter-spacing:1px}section{padding:0 16px 14px}section[hidden],[hidden]{display:none!important}.intro{padding:15px 2px 10px}h1{font-size:clamp(36px,9vw,57px);margin:0;font-weight:950;letter-spacing:-3px}h1 span{color:#bc4b27}p{font-size:14px;line-height:1.5;margin:8px 0 12px}.arena{position:relative;overflow:hidden;border-radius:16px;background:#88c5c1}.cover{height:52vh;max-height:560px}.arena canvas{width:100%;height:100%;display:block}.caption{position:absolute;left:14px;bottom:12px;background:#eff6dc;padding:6px 9px;border-radius:4px}.caption em{font:italic bold 10px Arial;margin-left:6px;color:#4c7061}.below{padding:5px 0}button{font:inherit;font-weight:750;color:#f9ffed;background:#164f43;border:0;border-radius:10px;padding:13px 16px;width:100%;cursor:pointer}.plain{color:#28584a;background:transparent;text-decoration:underline;padding:9px;width:auto}.hud,.controls{display:flex;justify-content:space-between;align-items:center;padding:10px 0}.hud h2{margin:2px 0;font-size:24px}.meter{text-align:right}.meter b{margin-left:5px}.meter progress{display:block;width:88px;height:6px;accent-color:#288459}.live{height:calc(100vh - 188px);height:calc(100dvh - 188px);min-height:245px;max-height:800px;touch-action:none}.controls{font-size:12px}.controls span{max-width:72%}#overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#112f3350}#overlay>div{width:83%;max-width:340px;background:#fffce9;padding:19px;border-radius:14px;box-shadow:0 12px 28px #1235}#overlay h2{margin:0}video{width:100%;height:43vh;display:block;background:#102f31;border-radius:14px}input{width:100%;padding:9px}#guide h2{margin:14px 0}button:focus-visible{outline:3px solid #ef9057}
.reading-rules .arena.live{position:static}
.reading-rules #overlay{position:fixed;top:0;left:0;right:0;bottom:0;z-index:5;background:#193933ed;padding:12px;padding-top:max(12px,env(safe-area-inset-top));padding-bottom:max(12px,env(safe-area-inset-bottom))}
.reading-rules #overlay>div{width:100%;max-width:395px;padding:20px;border-top:5px solid #dd7542}
#rules{list-style:none;counter-reset:rule;margin:14px 0;padding:0}
#rules li{counter-increment:rule;position:relative;padding:8px 0 8px 35px;border-top:1px solid #cfdbc8}
#rules li:before{content:counter(rule,decimal-leading-zero);position:absolute;left:0;top:10px;font:700 13px Arial;color:#427059}
#rules strong,#rules span{display:block}#rules strong{font-size:16px}#rules span{font-size:14px;line-height:1.42;margin-top:3px;color:#384d43}
@media(max-height:580px){.reading-rules #overlay>div{padding:12px 15px}.reading-rules #desc{margin:4px 0}#rules{margin:6px 0}#rules li{padding-top:5px;padding-bottom:5px}}
@media(orientation:landscape) and (max-height:500px){.reading-rules #overlay>div{max-width:640px}#rules{display:grid;grid-template-columns:1fr 1fr;column-gap:14px}}