:root{color-scheme:dark;font-family:"Microsoft YaHei","PingFang SC",ui-monospace,SFMono-Regular,Consolas,monospace;background:#05090a;color:#f0ecd8;-webkit-tap-highlight-color:transparent}
*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0;overflow:hidden;overscroll-behavior:none;background:radial-gradient(circle at 50% 15%,rgba(74,92,73,.28),transparent 44%),#05090a}body{display:grid;place-items:center;touch-action:none;user-select:none;-webkit-user-select:none}button{font:inherit}
.game-shell{position:relative;width:min(100vw,calc(100vh * 9 / 16));height:min(100vh,calc(100vw * 16 / 9));max-width:100vw;max-height:100vh;overflow:hidden;background:#0b1213;border:1px solid rgba(205,189,115,.3);box-shadow:0 0 70px rgba(0,0,0,.7);touch-action:none}
.game-shell:fullscreen,.game-shell:-webkit-full-screen{width:100vw;height:100vh;border:0;display:grid;place-items:center;background:#000}.game-shell:fullscreen canvas,.game-shell:-webkit-full-screen canvas{width:min(100vw,calc(100vh * 9 / 16));height:min(100vh,calc(100vw * 16 / 9))}
canvas{display:block;width:100%;height:100%;image-rendering:pixelated;image-rendering:crisp-edges;touch-action:none;background:#10191a}.loading{position:absolute;inset:0;display:grid;place-items:center;background:#0b1213;color:#aab9b3;font-size:14px;pointer-events:none;transition:opacity .25s}.loading.hidden{opacity:0}
.start-gate{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:max(18px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left));background:rgba(3,7,8,.94);backdrop-filter:blur(8px)}.start-gate[hidden]{display:none}.gate-panel{width:min(410px,92vw);padding:28px 24px;border:2px solid #95834a;border-radius:12px;background:#111b1b;text-align:center;box-shadow:0 24px 80px rgba(0,0,0,.55)}
h1{margin:0;font-size:clamp(26px,8vw,40px);letter-spacing:2px}p{margin:15px auto 21px;max-width:350px;color:#aebdb7;line-height:1.7;font-size:14px}small{display:block;margin-top:15px;color:#788985;line-height:1.5;font-size:12px}#enterButton{min-width:230px;border:2px solid #efd676;border-radius:7px;padding:13px 20px;background:#c6a94f;color:#16160d;font-weight:800;cursor:pointer}#enterButton:focus-visible{outline:3px solid rgba(255,226,118,.42);outline-offset:4px}
.tank-mark{position:relative;width:95px;height:70px;margin:0 auto 18px}.tank-mark span{position:absolute;left:20px;top:24px;width:58px;height:31px;background:#718f4e;box-shadow:inset 0 -8px #39472b}.tank-mark b{position:absolute;left:37px;top:10px;width:32px;height:23px;background:#a4bd6c;box-shadow:inset 0 -6px #39472b}.tank-mark b:after{content:"";position:absolute;left:26px;top:8px;width:48px;height:7px;background:#39472b}.tank-mark i{position:absolute;left:11px;top:48px;width:75px;height:14px;background:repeating-linear-gradient(90deg,#232925 0 8px,#475149 8px 14px)}
@media(max-width:600px){.game-shell{border:0;box-shadow:none}.gate-panel{padding:24px 20px}}