.echo-shell{--echo-ink:#24382f;--echo-muted:#65736a;--echo-lime:#d7ed74;--echo-line:#d9dfd4;min-height:100vh;color:var(--echo-ink);background:#f5f5ed;padding:0 max(24px,50vw - 540px) 24px;font-family:PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.6}.echo-shell *,.echo-shell :before,.echo-shell :after{box-sizing:border-box}.echo-shell button,.echo-shell a{touch-action:manipulation}.echo-shell button{font:inherit;cursor:pointer}.echo-shell button:disabled{cursor:default;opacity:.55}:is(.echo-shell button:focus-visible,.echo-shell a:focus-visible,.echo-shell canvas:focus-visible){outline-offset:4px;outline:3px solid #9376b5}.echo-shell svg{flex-shrink:0}.echo-header{border-bottom:1px solid var(--echo-line);align-items:center;gap:30px;min-height:72px;display:flex}.echo-brand{white-space:nowrap;color:var(--echo-ink);letter-spacing:-.04em;align-items:center;gap:9px;font-size:17px;font-weight:850;text-decoration:none;display:flex}.echo-brand>svg{box-sizing:content-box;color:#f5f5ed;background:var(--echo-ink);border-radius:12px;padding:9px;transform:rotate(-6deg)}.echo-header nav{flex:1;gap:5px;display:flex}.echo-header nav a{color:#66726a;white-space:nowrap;border-radius:8px;align-items:center;gap:7px;padding:8px 12px;font-size:13px;font-weight:650;text-decoration:none;display:flex}.echo-header nav a:hover{background:#e9edde}.echo-header nav a[aria-current]{color:var(--echo-ink);background:#e4e9d8}.echo-header nav a>span{border:1px solid #c6ceba;border-radius:4px;padding:0 4px;font:700 11px/1.5 monospace}.echo-account{min-height:42px;color:var(--echo-ink);background:#fcfcf5;border:1px solid #c4ccbc;border-radius:9px;align-items:center;gap:7px;padding:8px 12px;display:flex;font-size:13px!important}.echo-account span{white-space:nowrap;text-overflow:ellipsis;max-width:100px;overflow:hidden}.echo-intro{justify-content:space-between;align-items:center;gap:20px;padding:24px 2px 26px;display:flex}.echo-eyebrow{color:#637064;align-items:center;gap:7px;margin-bottom:8px;font-size:12px;font-weight:650;display:flex}.echo-eyebrow>span{background:#8faa32;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 3px #e7eccf}.echo-intro h1{letter-spacing:-.055em;margin:0;font-size:clamp(30px,3.6vw,42px);font-weight:950;line-height:1.2}.echo-intro h1>span{isolation:isolate;white-space:nowrap;position:relative}.echo-intro h1>span:before{content:"";z-index:-1;background:var(--echo-lime);height:11px;position:absolute;bottom:3px;left:-2px;right:4px;transform:rotate(-2deg)}.echo-intro h1 em{color:#93ac46;font-style:normal}.echo-intro p{color:#6f7c6f;margin:9px 0 0;font-size:14px}.echo-intro-art{flex-shrink:0;width:288px;height:108px;margin-right:6px;position:relative}.echo-art-caption{color:#6c786b;font-size:12px;position:absolute;top:13px;left:0;transform:rotate(-5deg)}.echo-art-caption b{color:var(--echo-ink);margin-top:3px;font-size:17px;display:block}.echo-doodle-rabbit,.echo-doodle-ghost{background:var(--echo-lime);border:2px solid var(--echo-ink);width:47px;height:44px;color:var(--echo-ink);letter-spacing:0;z-index:1;border-radius:17px 17px 15px 15px;place-items:center;padding-bottom:15px;font:900 43px/.4 monospace;display:grid;position:absolute;box-shadow:2px 3px #25362a14}.echo-doodle-rabbit{top:49px;right:17px;transform:rotate(9deg)}.echo-doodle-rabbit:before,.echo-doodle-rabbit:after{content:"";background:inherit;border:2px solid var(--echo-ink);border-bottom:0;border-radius:50% 50% 4px 4px;width:12px;height:29px;position:absolute;top:-25px}.echo-doodle-rabbit:before{left:6px;transform:rotate(-8deg)}.echo-doodle-rabbit:after{right:6px;transform:rotate(8deg)}.echo-doodle-ghost{background:#ed8a71;border-radius:17px 17px 8px 8px;top:1px;right:93px;transform:rotate(-12deg)}.echo-doodle-trail{border-top:0;border-bottom:1.5px dashed #aab499;border-left:1.5px dashed #aab499;border-right:0;border-radius:0 0 0 27px;width:91px;height:49px;position:absolute;top:30px;right:42px;transform:rotate(-10deg)}.echo-layout{grid-template-columns:minmax(0,1fr) 302px;align-items:start;gap:26px;display:grid}.echo-play-column{min-width:0}.echo-stage{background:#fefff8;border:1px solid #bcc7b4;border-radius:20px;padding:0 20px 16px;scroll-margin-top:12px;overflow:hidden;box-shadow:0 5px #dfe5d7,0 14px 30px #34432805}.echo-stage-top{background:var(--echo-ink);justify-content:space-between;align-items:center;gap:12px;min-height:66px;margin:0 -20px;padding:10px 16px;display:flex}.echo-modes{background:#122a2166;border:1px solid #7b8a7555;border-radius:9px;gap:3px;min-width:0;margin:0;padding:3px;display:flex}.echo-modes button{color:#c6d1bd;white-space:nowrap;background:0 0;border:0;border-radius:6px;min-height:37px;padding:6px 13px;font-size:13px;font-weight:750}.echo-modes button[aria-pressed=true]{background:var(--echo-lime);color:var(--echo-ink);opacity:1;box-shadow:0 1px 2px #0002}.echo-tools{gap:2px;display:flex}.echo-icon-button{color:#d1dbc6;background:0 0;border:0;border-radius:8px;justify-content:center;align-items:center;width:42px;height:42px;padding:0;display:inline-flex}.echo-icon-button:hover{background:#f1f6e216}.echo-pause{color:var(--echo-lime);background:#e4eac613}.echo-hud{grid-template-columns:1.05fr 1fr .85fr;align-items:center;gap:18px;padding:13px 1px 14px;display:grid}.echo-hud>div>span{color:#697765;align-items:center;gap:5px;font-size:12px;display:flex}.echo-hud strong{letter-spacing:-.07em;font-variant-numeric:tabular-nums;margin-top:4px;font:750 31px/1.1 SFMono-Regular,Consolas,monospace;display:block}.echo-hud strong small{color:#70816b;letter-spacing:0;margin-left:5px;font:500 12px/1.2 PingFang SC,sans-serif}.echo-current-score strong{color:#354c25;font-size:40px;animation:.2s ease-out echo-score-in}.echo-current-score>span svg{color:#7b912e}.echo-time strong{display:inline-block}.echo-time-track{background:#e6ebdc;border-radius:5px;max-width:130px;height:3px;margin-top:6px;overflow:hidden}.echo-time-track i{border-radius:inherit;background:#9db45a;height:100%;display:block}.echo-hud.is-urgent .echo-time strong{color:#bf563f}.echo-hud.is-urgent .echo-time-track i{background:#cf6e53}.echo-hud .echo-best{border-left:1px solid #e4e9dc;grid-template-columns:auto 1fr;align-items:center;gap:2px 7px;padding-left:19px;display:grid}.echo-best>svg{color:#8f9b71;grid-row:span 2}.echo-hud .echo-best>span{white-space:nowrap;font-size:12px}.echo-best strong{margin:0;font-size:23px}.echo-field{aspect-ratio:360/440;background:#f7f5eb;border:1.5px solid #9ba98d;border-radius:13px;width:min(100%,410px,81.818svh - 229.09px);min-width:min(100%,240px);margin:0 auto;position:relative;overflow:hidden;box-shadow:inset 0 0 0 4px #fff9,0 3px 8px #273d2110}.echo-field canvas{touch-action:none;-webkit-user-select:none;user-select:none;width:100%;height:100%;display:block}.echo-start-overlay,.echo-end-overlay{text-align:center;background:#f8f7edeb;flex-direction:column;justify-content:center;align-items:center;gap:20px;padding:20px;display:flex;position:absolute;inset:0}.echo-start-illustration{flex-shrink:0;width:243px;height:106px;margin-bottom:0;position:relative}.echo-start-illustration .echo-doodle-ghost{width:43px;height:41px;top:20px;left:18px}.echo-start-illustration .echo-doodle-rabbit{width:52px;height:48px;top:30px;right:39px}.echo-start-illustration>svg{color:#91a744;position:absolute;top:8px;right:0;transform:rotate(12deg)}.echo-demo-path{border-top:2px dashed #b6c29c;border-right:2px dashed #b6c29c;border-radius:0 21px 0 0;width:91px;height:37px;position:absolute;top:20px;left:63px;transform:rotate(9deg)}.echo-demo-delay,.echo-demo-you{color:#9b6652;font-size:12px;position:absolute;top:79px}.echo-demo-delay{left:4px;transform:rotate(-7deg)}.echo-demo-you{color:#63723b;top:89px;right:38px}.echo-start-copy h2,.echo-start-overlay h2{letter-spacing:-.04em;margin:3px 0 8px;font-size:23px;font-weight:900;line-height:1.45}.echo-small-label{color:#71825f;font-size:12px;font-weight:650}.echo-start-overlay p{color:#6b7b64;margin:0;font-size:14px;line-height:1.8}.echo-primary{min-height:48px;color:var(--echo-ink);background:var(--echo-lime);border:1.5px solid var(--echo-ink);box-shadow:0 3px 0 var(--echo-ink);border-radius:10px;justify-content:center;align-items:center;gap:10px;padding:11px 20px;transition:transform .15s,box-shadow .15s,background .15s;display:inline-flex;font-size:15px!important;font-weight:850!important}.echo-primary:hover:not(:disabled){box-shadow:0 4px 0 var(--echo-ink);background:#e3f294;transform:translateY(-1px)}.echo-primary:active:not(:disabled){box-shadow:0 1px 0 var(--echo-ink);transform:translateY(2px)}.echo-start-overlay .echo-primary{width:100%;max-width:260px}.echo-start-overlay>small{color:#78846e;justify-content:center;align-items:center;gap:10px;font-size:12px;line-height:1.6;display:flex}.echo-start-overlay>small>span{white-space:nowrap;border-left:1px solid #c8d0bd;padding-left:10px}.echo-paused-overlay{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);gap:16px}.echo-pause-mark{color:#526639;background:#e8edda;border:1px solid #c8d4b4;border-radius:50%;place-items:center;width:60px;height:60px;display:grid}.echo-paused-overlay h2{margin:0;font-size:22px}.echo-ready-overlay{pointer-events:none;background:#f5f5e5a3;flex-direction:column;justify-content:center;align-items:center;gap:5px;display:flex;position:absolute;inset:0}.echo-ready-overlay>span{color:#627447;letter-spacing:.1em;font-size:13px}.echo-ready-overlay strong{letter-spacing:-.08em;text-shadow:3px 4px 0 var(--echo-lime);font-size:76px;font-weight:900;line-height:1.3}.echo-ready-overlay p{color:#516440;margin:8px 0;font-size:13px}.echo-end-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#f3f4e59c;padding:16px}.echo-end-card{border:1.5px solid var(--echo-ink);background:#fffff6;border-radius:17px;width:100%;max-width:306px;padding:22px 20px 10px;animation:.22s ease-out echo-result-in;box-shadow:5px 6px #c7d0b6b8}.echo-ending-badge{color:#a34e38;white-space:nowrap;background:#fbe9dd;border-radius:6px;justify-content:center;align-items:center;gap:5px;padding:5px 8px;font-size:12px;display:inline-flex}.echo-ending-badge.is-complete{color:#607729;background:#e9f0d3}.echo-end-score>span{color:#788669;margin-top:16px;font-size:12px;display:block}.echo-end-score strong{letter-spacing:-.065em;color:#2b432f;justify-content:center;align-items:baseline;gap:7px;font:800 70px/1.1 SFMono-Regular,Consolas,monospace;display:flex}.echo-end-score small{letter-spacing:0;font:650 13px/1.5 PingFang SC,sans-serif}.echo-end-card>p{color:#748368;margin:8px 0 17px;font-size:13px}.echo-end-card>.echo-primary{width:100%}.echo-end-actions{gap:8px;margin-top:10px;display:flex}.echo-end-actions button{color:#5e7151;white-space:nowrap;background:0 0;border:0;flex:1;justify-content:center;align-items:center;gap:4px;min-height:42px;padding:5px 0;font-size:12px;display:flex}.echo-end-actions button:hover{color:#263e26}.echo-replay-ribbon{color:#f5f6e8;background:#273c2eea;border:1px solid #526342;border-radius:8px;justify-content:space-between;align-items:center;min-height:44px;padding:0 9px 0 12px;font-size:12px;display:flex;position:absolute;bottom:8px;left:8px;right:8px}.echo-replay-ribbon>span{align-items:center;gap:6px;display:flex}.echo-replay-ribbon>span>span{background:#d3e681;border-radius:50%;width:6px;height:6px}.echo-replay-ribbon button{color:#e0efac;text-underline-offset:3px;background:0 0;border:0;min-height:44px;padding:5px;font-size:12px;text-decoration:underline}.echo-ghost-panel{max-width:440px;margin:12px auto 0}.echo-ghost-heading{justify-content:space-between;align-items:center;gap:5px;margin-bottom:6px;display:flex}.echo-ghost-heading>span{color:#728068;align-items:center;gap:5px;font-size:12px;display:flex}.echo-ghost-heading>small{color:#7c886e;font-size:12px}.echo-shadow-strip{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;display:grid}.echo-shadow-strip>span{--shadow:#7d8c72;--shadow-bg:#f2f4e9;background:var(--shadow-bg);color:#78866f;border:1px solid #dfe5d5;border-radius:7px;justify-content:center;align-items:center;gap:7px;min-height:43px;padding:4px 6px;display:flex}.echo-shadow-strip>span.is-awake{color:var(--shadow);border-color:color-mix(in srgb, var(--shadow) 23%, transparent)}.echo-shadow-strip>.echo-shadow-0.is-awake{--shadow:#b35e45;--shadow-bg:#fbeddf}.echo-shadow-strip>.echo-shadow-1.is-awake{--shadow:#a258ab;--shadow-bg:#f4eaf5}.echo-shadow-strip>.echo-shadow-2.is-awake{--shadow:#a47228;--shadow-bg:#f7f0dc}.echo-shadow-strip>.echo-shadow-3.is-awake{--shadow:#477daa;--shadow-bg:#eaf2f8}.echo-shadow-icon{display:flex}.echo-shadow-strip b{font:750 14px/1.15 SFMono-Regular,monospace;display:block}.echo-shadow-strip b small{margin-left:2px;font:500 11px/1.2 PingFang SC,sans-serif}.echo-shadow-strip em{white-space:nowrap;margin-top:2px;font-size:10px;font-style:normal;line-height:1.4;display:block}.echo-underboard{color:#7a866e;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 20px;margin:15px 0 20px;font-size:12px;display:flex}.echo-underboard>span{align-items:center;gap:4px;display:inline-flex}.echo-save-panel{border-top:1px solid #e3e9d8;margin-top:14px;padding-top:12px}.echo-save-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;display:flex}.echo-save-button{color:#597244;background:#edf3e0;border:1px solid #c4d2b2;border-radius:7px;align-items:center;gap:6px;min-height:40px;padding:8px 14px;display:inline-flex;font-size:13px!important;font-weight:650!important}.echo-text-button{color:#67785a;background:0 0;border:0;justify-content:center;align-items:center;gap:6px;min-height:40px;padding:7px 2px;display:inline-flex;font-size:13px!important}.echo-note{color:#79846f;text-align:center;margin:8px 0 0;font-size:12px;line-height:1.7;display:block}.echo-notice{color:#82692f;background:#fbf2dc;border:1px solid #ead9ae;border-radius:8px;margin-top:12px;padding:10px 12px;font-size:13px;display:block}.echo-copy-fallback{resize:vertical;background:#fcfff4;border:1px solid #d0dbc1;border-radius:7px;width:100%;min-height:95px;margin-top:10px;padding:10px;font-family:inherit;font-size:13px;line-height:1.7}.echo-sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.echo-sidebar{gap:19px;display:grid}.echo-board{background:#fffff8;border:1px solid #ccd6c0;border-radius:17px;padding:17px 20px 18px;box-shadow:0 3px #e5eada}.echo-section-label{color:#7b8971;justify-content:space-between;align-items:center;font-size:12px;font-weight:650;display:flex}.echo-section-label .echo-icon-button{color:#869579;width:34px;height:34px}.echo-section-label .echo-icon-button:hover{background:#f0f4e4}.echo-board-heading{align-items:center;gap:10px;margin-top:5px;display:flex}.echo-board-heading-icon{color:#7c9340;background:#edf2de;border:1px solid #dce5c5;border-radius:11px;place-items:center;width:41px;height:43px;display:grid}.echo-board h2{letter-spacing:-.04em;margin:0;font-size:22px;font-weight:850;line-height:1.4}.echo-board-date{color:#89967b;white-space:nowrap;margin:3px 0 0;font-size:11px}.echo-empty{text-align:center;background:#f5f7ec;border:1px dashed #d6dfc5;border-radius:12px;flex-direction:column;align-items:center;gap:10px;margin:17px 0 0;padding:22px 8px 20px;display:flex}.echo-empty-medal{color:#9bab77;background:#e9efda;border-radius:50%;place-items:center;width:44px;height:44px;margin-bottom:3px;display:grid}.echo-empty strong{font-size:14px;font-weight:750}.echo-empty p{color:#899777;max-width:195px;margin:0;font-size:12px;line-height:1.8}.echo-board-rules{color:#7d8b70;border-top:1px solid #e8edde;margin:16px 0 0;padding-top:13px;font-size:11px;line-height:1.9}.echo-ranks{margin:16px 0 0;padding:0;list-style:none}.echo-ranks>li{border-bottom:1px solid #edf0e6;align-items:center;gap:10px;padding:13px 0;font-size:13px;display:flex}.echo-ranks>li.is-me{background:#eef4dd;border-radius:7px;margin:0 -7px;padding-left:7px;padding-right:7px}.echo-rank{color:#94a080;flex:0 0 23px;font:750 13px monospace}.echo-rank-1{color:#9b782c}.echo-rank-2{color:#738a90}.echo-rank-3{color:#ac7e64}.echo-ranks>li>span{overflow-wrap:anywhere;flex:1;min-width:0}.echo-ranks>li>span small{color:#7b8d5b;background:#e7efcf;border-radius:3px;margin-left:5px;padding:0 4px;font-size:11px;display:inline-block}.echo-ranks>li>strong{white-space:nowrap;font-variant-numeric:tabular-nums;font-size:19px}.echo-ranks>li>strong small{color:#87967a;margin-left:4px;font-size:11px;font-weight:500}.echo-my-rank{color:#627648;background:#edf4db;border-radius:7px;justify-content:space-between;align-items:center;gap:5px;margin:12px 0 0;padding:10px;font-size:12px;display:flex}.echo-my-rank strong{white-space:nowrap;font-size:12px}.echo-how{background:#edefdf;border:1px solid #e0e5d2;border-radius:15px;padding:18px 20px}.echo-how-heading{border-bottom:1px solid #dbe2cb;justify-content:space-between;align-items:center;gap:8px;padding-bottom:12px;display:flex}.echo-how-heading>span:last-child{color:#929e7b;font-size:11px}.echo-how>div:not(.echo-how-heading){align-items:flex-start;gap:9px;margin-top:17px;display:flex;position:relative}.echo-how-number{color:#9ba888;padding-top:2px;font:700 11px/1.8 monospace}.echo-how>div>svg{color:#8c9b60;margin-top:2px}.echo-how p{flex-direction:column;gap:3px;margin:0;display:flex}.echo-how p b{font-size:14px;font-weight:750}.echo-how p>span{color:#7d8b6b;font-size:12px;line-height:1.7}.echo-how>button{color:#72845c;background:0 0;border:0;border-top:1px solid #dbe2cb;justify-content:space-between;align-items:center;width:100%;min-height:36px;margin-top:15px;padding:8px 0 0;font-size:12px;display:flex}.echo-side-caption{color:#899675;justify-content:center;align-items:center;gap:13px;padding:6px 0;display:flex}.echo-side-caption>span{color:#a2b775;font-size:39px;line-height:1;transform:rotate(-15deg)}.echo-side-caption p{margin:0;font-size:13px;line-height:1.7}.echo-side-caption b{color:#63754e;font-size:16px;font-weight:750}.echo-footer{border-top:1px solid var(--echo-line);color:#899579;justify-content:space-between;align-items:center;gap:15px;margin-top:25px;padding-top:18px;font-size:11px;display:flex}.echo-footer>div{gap:16px;display:flex}.echo-footer button,.echo-footer a{color:#758766;background:0 0;border:0;padding:6px 0;font-size:12px;text-decoration:none}@keyframes echo-score-in{0%{opacity:.65;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}@keyframes echo-result-in{0%{opacity:.4;transform:translateY(8px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}@media (max-width:1000px){.echo-header{gap:18px}.echo-header nav a{padding:8px 9px}.echo-layout{grid-template-columns:minmax(0,1fr) 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