.gm{--ink:#0b3954;--muted:#5b6b7b;--sky:#29abe2;--acc:#1580bc;--band:#eaf7fd;--green:#2e7d4f;--amb:#e3a33b;--line:#0b395424;--line2:#0b395447;--codebg:#f3f6f9;color:var(--ink);background:#f7fafc;min-height:100vh;font-family:Arial,Segoe UI,Tahoma,sans-serif;font-size:16px;line-height:1.7}.gm *{box-sizing:border-box}.gm [hidden]{display:none!important}.gm bdi{unicode-bidi:isolate}.gm code{font-family:Consolas,Courier New,monospace}.gm .hd{background:var(--sky);color:#fff;padding:16px}.gm .in,.gm .tabs,.gm main,.gm .prog4{max-width:1180px;margin:auto}.gm h1{margin:0;font-size:clamp(22px,4vw,34px);line-height:1.3}.gm .en{opacity:.9;font-size:14px}.gm .sub{margin:4px 0 0}.gm button{font:inherit;cursor:pointer;color:var(--ink);border:1px solid var(--line2);background:#fff;border-radius:14px;min-height:44px;padding:4px 12px}.gm button:disabled{opacity:.4;cursor:default}.gm .prog4{padding:10px 16px 0}.gm .pin{border:1px solid var(--line);background:#fff;border-radius:18px;flex-wrap:wrap;align-items:center;gap:12px;padding:8px 14px;display:flex}.gm .ptx{flex-direction:column;line-height:1.35;display:flex}.gm .ptx span{color:var(--muted);font-size:14px}.gm .ring{display:inline-block;position:relative}.gm .ring svg{width:100%;height:100%;transform:rotate(-90deg)}.gm .ring .rb{fill:none;stroke:var(--band);stroke-width:4px}.gm .ring .rf{fill:none;stroke:var(--sky);stroke-width:4px;stroke-linecap:round;transition:stroke-dasharray .5s}.gm .ring.done .rf{stroke:var(--green)}.gm .ring b{justify-content:center;align-items:center;font-size:13px;display:flex;position:absolute;inset:0}.gm .sw{cursor:pointer;align-items:center;gap:8px;min-height:44px;margin-inline-start:auto;display:inline-flex}.gm .sw input{opacity:0;width:1px;height:1px;position:absolute}.gm .sl4{background:var(--line2);border-radius:12px;width:42px;height:24px;transition:background .2s;position:relative}.gm .sl4:after{content:"";top:3px;background:#fff;border-radius:50%;width:18px;height:18px;transition:inset-inline-end .2s;position:absolute;inset-inline-end:3px}.gm .sw input:checked+.sl4{background:var(--sky)}.gm .sw input:checked+.sl4:after{inset-inline-end:21px}.gm .sw input:focus-visible+.sl4{outline:2px solid var(--ink)}.gm .tabs{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:12px 16px 4px;display:grid}@media (min-width:600px){.gm .tabs{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (min-width:900px){.gm .tabs{grid-template-columns:repeat(4,minmax(0,1fr))}}.gm .tb{text-align:start;justify-content:space-between;align-items:center;gap:7px;min-width:0;padding:6px 12px 10px;font-size:15px;line-height:1.35;display:flex;position:relative;overflow:hidden}.gm .tb>span:first-child{overflow-wrap:anywhere;flex:auto;min-width:0}.gm .tb .n{text-align:center;background:var(--band);color:var(--acc);border-radius:8px;flex:none;min-width:24px;padding:0 6px;font-size:13px;font-weight:700}.gm .tb.on{background:var(--acc);border-color:var(--acc);color:#fff}.gm .tb.on .n{background:#fff}.gm .tbar{background:var(--band);border-radius:2px;height:4px;position:absolute;bottom:4px;left:10px;right:10px}.gm .tbar i{background:var(--sky);border-radius:2px;height:100%;display:block}.gm .tb.on .tbar{background:#ffffff59}.gm .tb.on .tbar i{background:#fff}.gm main{padding:8px 16px 96px}.gm .panel{background:var(--band);border:1px solid var(--line);border-radius:20px;margin-top:8px;padding:14px}.gm .lead{margin:2px 0 12px;font-size:17px}.gm .subs{flex-wrap:wrap;gap:8px;margin:4px 0 12px;display:flex}.gm .sb{padding:6px 12px;font-size:14.5px}.gm .sb.on{background:var(--ink);border-color:var(--ink);color:#fff}.gm .sb small{opacity:.7}.gm .lvl{background:var(--band);color:var(--acc);border-radius:8px;padding:0 6px;font-size:12px;font-weight:700}.gm .lvl.extra{color:#7a4e08;background:#fcf3e2}.gm .sb.on .lvl{background:#fff}.gm .ok{color:var(--green);font-weight:700}.gm .lesson{border:1px solid var(--line);background:#fff;border-radius:18px;padding:14px}.gm .lesson h3{margin:0 0 4px;font-size:20px}.gm .crumb{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;display:flex}.gm .crumb button{min-height:32px;color:var(--acc);background:0 0;border:0;padding:0 4px;text-decoration:underline}.gm .goal{background:var(--band);border-inline-start:4px solid var(--sky);border-radius:10px;margin:8px 0 12px;padding:8px 12px}.gm .lgrid{grid-template-columns:1fr;gap:12px;display:grid}.gm .stage{border:1px solid var(--line2);cursor:zoom-in;direction:ltr;background:#e4eaef;border-radius:12px;width:100%;position:relative;overflow:hidden}.gm .stage img{width:100%;height:auto;display:block}.gm .stage.framed{cursor:default;border:3px solid var(--acc);box-shadow:0 0 0 4px var(--band)}.gm .stage.ph{aspect-ratio:1920/1040;color:var(--muted);cursor:default;justify-content:center;align-items:center;display:flex}.gm .bx{mix-blend-mode:multiply;pointer-events:none;background:#ffbe0033;border-radius:3px;position:absolute;box-shadow:0 0 0 1.5px #de6e00f2}.gm .head5{background:var(--amb);color:#4a3000;border-radius:10px;margin-bottom:6px;padding:0 12px;font-weight:700;display:inline-block}.gm .stepno{color:var(--acc);font-size:15px;font-weight:700}.gm .cap{margin:2px 0 8px;font-size:19px;font-weight:700;line-height:1.6}.gm .mp{direction:ltr;unicode-bidi:isolate;flex-wrap:wrap;align-items:center;gap:2px;margin:0 2px;font-family:Segoe UI,Arial,sans-serif;font-size:.86em;font-weight:600;line-height:1.5;display:inline-flex}.gm .mi{background:#29abe221;border:1px solid #1580bc4d;border-radius:7px;padding:0 7px}.gm .mi.last{color:#0a3550;background:#1580bc3d;border-color:#1580bc99;font-weight:700}.gm .sep{color:var(--acc);font-style:normal;font-weight:700}.gm .dots{flex-wrap:wrap;margin:6px 0;display:flex}.gm .dots button{background:0 0;border:0;flex:14px;min-width:14px;max-width:34px;min-height:44px;padding:0;position:relative}.gm .dots button:before{content:"";background:var(--line2);border-radius:50%;width:10px;height:10px;margin:-5px 0 0 -5px;position:absolute;top:50%;left:50%}.gm .dots .done:before{background:var(--sky)}.gm .dots .on:before{background:var(--acc);width:14px;height:14px;margin:-7px 0 0 -7px}.gm .note{border-radius:12px;margin:8px 0;padding:9px 12px;font-size:15.5px}.gm .tip{color:#1d5a37;background:#eaf5ee}.gm .warn{color:#7a4e08;background:#fcf3e2}.gm .ex{color:#24406e;background:#eef2fa}.gm .cmdbox h4{color:var(--acc);margin:12px 0 4px}.gm .code{background:var(--codebg);border:1px solid var(--line);border-radius:14px;padding:38px 10px 8px;position:relative;overflow-x:auto}.gm .copy{min-height:30px;padding:0 10px;font-size:13px;position:absolute;top:6px;left:8px}.gm .copy.ok{background:var(--green);color:#fff}.gm .code table{border-collapse:collapse;width:100%}.gm .code td{vertical-align:top;border-top:1px dashed var(--line);padding:4px 6px}.gm .code tr:first-child td{border-top:0}.gm .code code{color:#1f3f99;white-space:nowrap;font-size:14px;font-weight:700}.gm tr.undo code{color:var(--muted)}.gm .cm{font-size:14.5px}.gm .see{flex-wrap:wrap;align-items:center;gap:8px;margin:10px 0;display:flex}.gm .sl{border:1px solid var(--line2);color:var(--ink);background:#fff;border-radius:12px;flex-direction:column;padding:4px 12px;text-decoration:none;display:inline-flex}.gm .sl small{color:var(--muted)}.gm .donebtn{margin:6px 0}.gm .donebtn.ok{background:var(--green);border-color:var(--green);color:#fff}.gm .back4{z-index:30;background:var(--ink);color:#fff;flex-wrap:wrap;align-items:center;gap:10px;padding:8px 16px;display:flex;position:sticky;top:0}.gm footer{text-align:center;color:var(--muted);padding:18px;font-size:13px}.gm .nav5{z-index:40;border-top:1px solid var(--line2);background:#fffffff5;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 16px #0b39541a}.gm .n5in{max-width:1180px;padding:8px 16px calc(8px + env(safe-area-inset-bottom));grid-template-columns:1fr 1.3fr 1fr;align-items:center;gap:8px;margin:auto;display:grid}.gm .n5next{background:var(--acc);border-color:var(--acc);color:#fff}.gm .n5next:disabled{color:var(--ink);background:#fff}.gm .n5mid{flex-direction:column;align-items:center;min-width:0;line-height:1.25;display:flex}.gm .n5no{color:var(--acc);direction:ltr;font-weight:700}.gm .fsn{direction:ltr}.gm .n5tt{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:13px;overflow:hidden}.gm .fs4v{z-index:70;background:#0d1b26;display:flex;position:fixed;inset:0}.gm .fsb{flex-direction:column;gap:6px;width:100%;height:100%;padding:8px 12px 10px;display:flex}.gm .fst{color:#fff;align-items:center;gap:10px;display:flex}.gm .fsn{background:var(--acc);white-space:nowrap;border-radius:10px;padding:2px 10px;font-weight:700}.gm .fsp{flex:1;justify-content:center;align-items:center;min-width:0;min-height:0;display:flex;container-type:size}.gm .fsp .stage{width:min(100cqw,calc(100cqh * var(--ar,1.846)))}.gm .fsp .stage.zoomable{cursor:zoom-in}.gm .fsc{color:#fff;background:#ffffff14;border-radius:10px;padding:8px 14px;font-size:clamp(14px,min(2.1vw,3.6vh),22px);font-weight:700;line-height:1.55}.gm .fsc .head5{margin:0 0 4px;font-size:.8em}.gm .fsc .mi{color:#fff;background:#29abe240;border-color:#82cdf080}.gm .fsc .sep{color:#8fd3f4}.gm .fsctl{gap:8px;display:flex}.gm .fsctl button{flex:1}.gm small{opacity:.65}@media (min-width:900px){.gm .lgrid{grid-template-columns:minmax(0,2.2fr) minmax(260px,1fr);align-items:start}}.gm .lside .hs{display:none}@media (orientation:landscape) and (max-height:560px){.gm .hd{padding:6px 12px}.gm .hd .en,.gm .hd .sub{display:none}.gm h1{font-size:18px}.gm .prog4{display:none}.gm .tabs{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding:6px 12px 0}.gm .tb{min-height:36px;padding:4px 10px 8px;font-size:14px}.gm main{padding:4px 6px 56px}.gm .panel{border-radius:14px;padding:6px}.gm .lesson{border-radius:12px;padding:6px}.gm .goal{display:none}.gm .lgrid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:8px;scroll-margin-top:4px}.gm .lstage .head5{display:none}.gm .lside .hs{font-size:13px;display:inline-block}.gm .lstage .stage{width:min(100%,calc((100vh - 64px) * var(--ar,1.846)));margin:auto}.gm .lside{max-height:calc(100vh - 64px);overflow:auto}.gm .cap{margin:0 0 6px;font-size:clamp(13px,4.2vh,17px);line-height:1.5}.gm .stepno{font-size:13px}.gm .lside .note{padding:6px 10px;font-size:13px}.gm .lside .cb{min-height:36px;font-size:14px}.gm .dots button{min-height:32px}.gm .subs{scrollbar-width:thin;flex-wrap:nowrap;overflow-x:auto}.gm .sb{flex:none}.gm .lesson h3,.gm .lesson .crumb{display:none}.gm .n5in{padding:4px 12px calc(4px + env(safe-area-inset-bottom))}.gm .nav5 .cb{min-height:38px}.gm .n5tt{display:none}.gm .fsb{grid-template-rows:auto minmax(0,1fr) auto;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:6px 10px;padding:6px 8px;display:grid}.gm .fsp{grid-area:1/1/4}.gm .fst{grid-area:1/2}.gm .fsc{grid-area:2/2;padding:6px 10px;overflow:auto}.gm .fsctl{grid-area:3/2}.gm .fsctl button,.gm .fst .cb{min-height:36px}.gm .fsctl small{display:none}.gm[dir=rtl] .lgrid{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}.gm[dir=rtl] .lstage{grid-area:1/2}.gm[dir=rtl] .lside{grid-area:1/1}.gm[dir=rtl] .fsb{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}.gm[dir=rtl] .fsp{grid-column:2}.gm[dir=rtl] .fst,.gm[dir=rtl] .fsc,.gm[dir=rtl] .fsctl{grid-column:1}.gm .lside{padding-top:40px}}@media (orientation:portrait) and (max-width:700px){.gm main:before{content:attr(data-rot);text-align:center;color:var(--muted);font-size:13px;display:block}}@media (prefers-reduced-motion:reduce){.gm *{transition:none!important;animation:none!important}}.gm .nw{color:var(--green);background:#e6f4ea;border-radius:8px;margin-inline-start:4px;padding:0 6px;font-size:12px;font-weight:700}.gm .ret{border-color:var(--amb);background:#fff6e5;margin-inline-start:6px}.gm .stage.zoomable{cursor:zoom-in}.gm .stage{cursor:default}.gm .langtg{top:8px;z-index:90;border:1px solid var(--line2);background:#fff;border-radius:12px;display:inline-flex;position:fixed;inset-inline-end:10px;overflow:hidden;box-shadow:0 2px 8px #0b39542e}.gm .langtg button{letter-spacing:.04em;border:0;border-radius:0;min-width:44px;min-height:36px;padding:0 10px;font-size:13px;font-weight:700}.gm .langtg button.on{background:var(--ink);color:#fff}.gm .hd .in,.gm .back4,.gm .fst{padding-right:96px}.gm .hd .in{flex-wrap:wrap;align-items:center;gap:8px 14px;display:flex}.gm .hdt{flex:260px;min-width:0}.gm .matbtn{color:var(--ink);background:#fff;border:1px solid #ffffffb3;border-radius:12px;flex:none;align-items:center;gap:6px;min-height:40px;padding:4px 14px;font-size:15px;font-weight:700;display:inline-flex;box-shadow:0 2px 8px #0b39542e}.gm .matbtn:hover,.gm .matbtn:focus-visible{background:var(--ink);color:#fff;outline:none}@media (orientation:landscape) and (max-height:560px){.gm .matbtn{min-height:34px;padding:2px 12px;font-size:14px}.gm .hdt{flex-basis:200px}}.gm .zm4{z-index:92;background:#060e15;flex-direction:column;display:flex;position:fixed;inset:0}.gm .zmv{touch-action:none;cursor:grab;-webkit-user-select:none;user-select:none;flex:1;justify-content:center;align-items:center;min-height:0;display:flex;position:relative;overflow:hidden;container-type:size}.gm .zmi{width:min(100cqw,calc(100cqh * var(--ar,1.846)));transform-origin:50%;will-change:transform}.gm .zmi .stage{cursor:inherit;border:0;border-radius:0}.gm .zmi img{pointer-events:none}.gm .zmh{text-align:center;color:#bcd;pointer-events:none;margin:0;font-size:13px;position:absolute;bottom:8px;left:0;right:0}.gm .zm4[data-zoomed="1"] .zmh{display:none}.gm .zmx{top:8px;min-height:40px;position:absolute;inset-inline-start:10px;box-shadow:0 2px 8px #0006}.gm .mat4{z-index:95;background:#0614208c;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.gm .mat4s{background:#f7fafc;border-radius:18px;flex-direction:column;width:min(900px,100%);max-height:100%;display:flex;overflow:hidden;box-shadow:0 12px 40px #00000059}.gm .mat4h{border-bottom:1px solid var(--line);background:#fff;align-items:center;gap:10px;padding:8px 10px 8px 16px;display:flex}.gm[dir=rtl] .mat4h{padding:8px 16px 8px 10px}.gm .mat4h h2{flex:1;min-width:0;margin:0;font-size:clamp(18px,3vw,24px);line-height:1.3}.gm .mat4x{flex:none}.gm .mat4b{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:12px 16px 18px;overflow:auto}.gm .mlead{color:var(--muted);margin:0 0 12px;line-height:1.7}.gm .mlead p{margin:0 0 4px}.gm .mcard{border:1px solid var(--line);background:#fff;border-radius:16px;margin:0 0 12px;padding:12px 14px}.gm .mcard h3{margin:0 0 4px;font-size:18px}.gm .mcard p{color:var(--muted);margin:0 0 10px;line-height:1.7}.gm .mfiles{grid-template-columns:minmax(0,1fr);gap:8px;display:grid}@media (min-width:640px){.gm .mfiles{grid-template-columns:repeat(2,minmax(0,1fr))}}.gm .mat4 a.dl{border:1px solid var(--line2);background:var(--band);min-height:56px;color:var(--ink);border-radius:12px;flex-wrap:wrap;align-items:baseline;gap:0 10px;min-width:0;padding:6px 14px;font-size:15px;line-height:1.4;text-decoration:none;display:flex}.gm .mat4 a.dl:hover,.gm .mat4 a.dl:focus-visible{background:var(--acc);color:#fff;outline:none}.gm .mat4 a.dl.ex{background:var(--acc);color:#fff;border-color:var(--acc)}.gm .mat4 .fn{text-overflow:ellipsis;white-space:nowrap;text-align:left;flex:1 0 100%;min-width:0;font-weight:600;overflow:hidden}.gm[dir=rtl] .mat4 .fn{text-align:right}.gm .mat4 .fk,.gm .mat4 .fz{white-space:nowrap;opacity:.85;flex:none;font-size:13px}.gm .mat4 .fz{margin-inline-start:auto}.gm .mhow{overflow-wrap:anywhere;background:#eef2f6;border-radius:14px;padding:12px 16px;line-height:1.9}.gm .mhow code{direction:ltr;unicode-bidi:isolate}@media (max-width:600px){.gm .mat4{padding:8px}.gm .mat4b{padding:10px 10px 16px}.gm .mcard{padding:10px 12px}}