*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#edf0e8;color:#284a45;font:16px/1.5 "PingFang SC","Microsoft YaHei",sans-serif}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;min-height:44px;border:1px solid #d2d7c9;border-radius:13px;padding:9px 15px;cursor:pointer;background:#fffdf4;color:#36524a}button:hover{background:#eee4c8}button:disabled{cursor:wait;opacity:.5}button:focus-visible,a:focus-visible{outline:3px solid #ad653c;outline-offset:3px}a{color:inherit}.planet-game{height:100svh;min-height:690px;display:flex;flex-direction:column;max-width:1800px;margin:auto;padding:18px 26px}header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 6px 16px}.back{text-decoration:none;font-size:15px}.chapter-title{text-align:center}.chapter-title small{font-size:13px;color:#7e725b;letter-spacing:2px}.chapter-title h1{font-size:25px;font-weight:600;letter-spacing:3px;margin:0}#planet-stage{position:relative;flex:1;min-height:310px;overflow:hidden;border-radius:26px;background:#c5d8d2;isolation:isolate}#planet-stage canvas{width:100%;height:100%;display:block;touch-action:none}#loading{position:absolute;inset:0;z-index:3;display:grid;place-items:center;background:#dce5d8;text-align:center;padding:30px}#loading[hidden]{display:none}#node-labels{position:absolute;inset:0;pointer-events:none}.node-label{position:absolute;transform:translate(-50%,-115%);pointer-events:auto;background:#fff9e7ed;padding:5px 12px;min-height:36px;font-size:14px;white-space:nowrap;border-color:#cda764;box-shadow:0 3px 12px #3154491c}.node-label[hidden]{display:none}.node-label.unreachable{background:#dce6dfdc;color:#647971;border-color:#afc3b6}.node-label.current{background:#426e62;color:#fff}.view-controls{position:absolute;bottom:15px;left:50%;transform:translateX(-50%);display:flex;gap:8px;white-space:nowrap}.view-controls button{font-size:14px;background:#fff9e7ef}footer{position:relative;text-align:center;padding:14px 0 0;flex:none}.progress{display:flex;gap:12px;justify-content:center;color:#7c8b7d;font-size:14px}.progress span{padding:3px 10px;border-radius:20px;background:#e0e6dc}.progress .done{background:#cfdec9;color:#356044}.story h2{font-size:23px;letter-spacing:1px;margin:7px 0 2px}.story p{margin:0;font-size:15px}#word-note{font-size:14px;color:#8c653f;margin-top:5px;min-height:21px}.mechanism-controls{display:flex;gap:10px;justify-content:center;margin-top:10px}.mechanism-controls button{background:#416e62;color:#fff;border-color:#416e62;min-width:130px}.mechanism-controls button:hover{background:#31574f}.level-note{font-size:12px;color:#778373;margin:9px 0 0}.level-note a{margin-left:8px;text-underline-offset:3px}@media(max-width:700px){.planet-game{padding:12px 10px;min-height:700px}header{gap:6px;padding-bottom:10px}.back{font-size:14px}.chapter-title h1{font-size:21px}.chapter-title small{font-size:12px;letter-spacing:0}header button{font-size:14px;padding:7px 9px}#planet-stage{border-radius:20px}.view-controls{gap:5px;bottom:10px}.view-controls button{padding:7px 10px;font-size:14px}.story h2{font-size:20px}.story p{font-size:14px}.mechanism-controls{gap:6px}.mechanism-controls button{min-width:0;flex:1;padding:8px;font-size:14px}.progress{gap:4px}.progress span{padding:2px 8px}.node-label{font-size:13px;padding:3px 8px}.level-note{font-size:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
.header-actions{display:flex;gap:8px}.interaction-note{font-size:14px;margin:10px 0 5px;color:#8a6d48}.help{font-size:14px;max-width:850px;margin:0 auto;text-align:left}.help summary{text-align:center;cursor:pointer;padding:5px}.help p{margin:8px 0}.night{background:#101f30;color:#e6e6d7}.night .chapter-title small{color:#a2bbcb}.night #planet-stage{background:#172c43}.night button{background:#273c4f;color:#f3e3b8;border-color:#536a79}.night .node-label{background:#f7e5bfe8;color:#443f2d;border-color:#c69a59}.night .view-controls button{background:#253a4dea}.night .progress span{background:#283c49;color:#a3b7bc}.night .progress .done{background:#6d5734;color:#ffe0a0}.night .interaction-note{color:#c2b08c}.night #loading{background:#172c43;color:#efdfbf}.night .story h2{color:#ffe2ab}.node-label:active{transform:translate(-50%,-115%) scale(.97)}.planet-game{min-height:650px}#planet-stage{min-height:350px}.chapter-title h1{font-family:"Kaiti SC","STKaiti",serif;font-size:29px;letter-spacing:4px}footer{padding-top:12px}.story p{min-height:24px}.view-controls button{min-width:44px}.progress span{font-size:14px}.help[open]{background:#ffffff0d;padding:10px 18px;border-radius:14px}@media(max-width:700px){.header-actions{gap:4px;flex-direction:column}header .chapter-title h1{font-size:23px;letter-spacing:2px}.header-actions button{min-height:34px;padding:3px 7px;font-size:12px}.planet-game{min-height:740px;height:auto}#planet-stage{height:53svh;min-height:370px;flex:none}.interaction-note{font-size:14px;padding:0 10px}.story p{font-size:15px}.node-label{font-size:14px;min-height:40px}.back{max-width:80px}.story h2{font-size:21px}.help{font-size:14px}}
.chapter-links{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:14px}.chapter-links a{text-decoration:none;text-underline-offset:4px}.chapter-links a:hover{text-decoration:underline}.view-controls{max-width:calc(100% - 16px);flex-wrap:wrap;justify-content:center;gap:5px;white-space:normal;width:max-content}.view-controls button{padding:7px 10px;font-size:14px}.view-controls button[aria-pressed=true]{background:#b88035;color:#fff;border-color:#dcab65}.chapter-links .back{max-width:none}@media(max-width:700px){.chapter-links{flex-direction:column;align-items:flex-start;gap:4px;font-size:14px;max-width:100px}.view-controls{bottom:8px;gap:4px}.view-controls button{min-height:38px;padding:5px 8px;font-size:14px}}
.mechanism-controls{flex-wrap:wrap}.mechanism-controls button{font-size:14px;min-width:105px}.progress{flex-wrap:wrap}@media(max-width:700px){.mechanism-controls button{flex:1 1 40%;min-height:42px}.progress{gap:3px}}