:root{--bg:#f6f5ef;--ink:#263b31;--muted:#7b8278;--green:#2d5b45;--sage:#eaf0e5;--orange:#c87646;--line:#e3e6dc;--red:#b94e3e;--font:'Noto Sans SC','Microsoft YaHei',sans-serif;--serif:'Noto Serif SC','SimSun',serif}
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i{background:#b54e3d}.board-frame{background:#ede3ca;padding:15px;border-radius:14px;border:1px solid #d5c5a4;box-shadow:inset 0 0 0 5px #e3d4b5,0 4px 0 #e8e2d4}.chess-board{position:relative;width:100%;aspect-ratio:9/10;background:#f3e8cb;border:1px solid #d4bd8f;border-radius:3px;isolation:isolate;overflow:hidden;background-image:repeating-linear-gradient(0deg,#a2863a03 0,#a2863a03 1px,transparent 1px,transparent 5px)}#board-lines{position:absolute;inset:0;width:100%;height:100%;stroke:#b59c6c;stroke-width:1.35;fill:none;pointer-events:none}.river{position:absolute;top:45%;height:10%;left:10%;width:80%;display:flex;align-items:center;justify-content:space-around;font:600 clamp(16px,2vw,25px) var(--serif);letter-spacing:8px;color:#a08c65;pointer-events:none}.point{position:absolute;width:10.7%;height:9.63%;transform:translate(-50%,-50%);padding:0;display:grid;place-items:center;border-radius:50%;z-index:2}.piece{position:relative;width:85%;aspect-ratio:1;display:grid;place-items:center;border-radius:50%;background:linear-gradient(150deg,#fff8e4 5%,#f3dfae 90%);box-shadow:0 3px 0 #d0b780,0 4px 7px #796d4738,inset 0 0 0 2px #f9efd4;font:800 clamp(18px,2.4vw,30px) var(--serif);line-height:1;transition:transform .16s,box-shadow .16s;user-select:none}.piece:before{content:'';position:absolute;inset:5px;border:1px solid #b891605e;border-radius:50%}.piece.red{color:#b64d38}.piece.black{color:#344d41}.point:hover .piece{transform:translateY(-2px)}.point.selected{z-index:4;background:#7e9c5140;box-shadow:0 0 0 2px #6b8b47}.point.selected .piece{transform:translateY(-3px);box-shadow:0 4px 0 #b6a076,0 7px 11px #53672c30}.point.available:after{content:'';position:absolute;width:22%;aspect-ratio:1;background:#78945c;border-radius:50%;box-shadow:0 0 0 5px #8da76c18;pointer-events:none}.point.capture:after{width:94%;background:none;box-shadow:none;border:3px dashed #73934f}.point.last-from:before,.point.last-to:before{content:'';position:absolute;inset:8%;border:2px solid #b9995b;border-radius:9px;background:#cbad6220;transform:rotate(6deg)}.point.hinted{background:#f3cf5855;box-shadow:0 0 0 3px #c5a044;z-index:3}.point.target:before{content:'★';display:grid;place-items:center;position:absolute;inset:6%;color:#c59437;font-size:29px;background:#e9cd7e66;border:2px dashed #c09a48;border-radius:50%;z-index:3;pointer-events:none}.move-arrow{position:absolute;z-index:5;pointer-events:none;height:5px;background:#c68e37;transform-origin:left center;border-radius:3px;opacity:.85}.move-arrow:after{content:'';position:absolute;right:-2px;top:-6px;border-left:12px solid #c68e37;border-top:8px solid 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b{font-size:11px;display:block;font-weight:600;white-space:nowrap}.path-step small{font-size:9px;color:#a2a591;display:block;margin-top:4px}.path-step>span:last-child{color:#a4ad96;margin-left:auto}footer{max-width:1184px;margin:0 auto 23px;display:flex;align-items:center;justify-content:space-between;font-size:9px;color:#b0b1a1;padding:0 0}footer>span:first-child{color:#94a088;font-size:11px;display:flex;align-items:center;gap:7px}.footer-brand{font-family:var(--serif);border:1px solid #afb8a4;border-radius:5px;padding:0 4px;font-size:12px}footer p{margin:0}dialog{border:1px solid #e3e5d8;border-radius:24px;padding:34px;max-width:490px;width:calc(100% - 32px);background:#fcfcf6;color:var(--ink);box-shadow:0 30px 100px #283f3130}dialog::backdrop{background:#24372b66;backdrop-filter:blur(4px)}dialog h2{font-size:24px;text-align:center;margin:8px 0 14px}dialog>p{font-size:13px;color:#7e8872;line-height:1.9;text-align:center}.dialog-close{position:absolute;top:12px;right:14px;font-size:26px;color:#929a84;width:36px;height:36px}.modal-symbol{display:block;text-align:center;font-size:40px;color:#aaad70}.help-list{padding-left:24px;margin:24px 0}.help-list li{padding:5px 0 12px;color:#809269}.help-list b{font-size:13px;display:block;color:#415a3a}.help-list span{font-size:12px;color:#7a846e;display:block;margin-top:4px}.help-tip{padding:14px;background:#edf1e4;border-radius:10px;color:#7a8a62;font-size:12px}dialog .parent-note{font-size:10px;line-height:1.8;text-align:left;color:#969d87;margin:14px 0 21px}.primary-button{background:var(--green);color:white;padding:13px 20px;border-radius:10px;font-weight:500}.primary-button:hover{background:#254a38}#help-start{width:100%;font-size:13px}.dialog-buttons{display:flex;gap:12px;margin-top:25px}.dialog-buttons>button{flex:1;border-radius:10px;background:#edf0e5;font-size:13px;padding:12px}.dialog-buttons>.primary-button{background:var(--green)}#result-dialog{text-align:center}.result-stars{font-size:40px;color:#c5a258;margin:8px 0;letter-spacing:12px}#result-next{width:100%;margin-top:12px}.text-button{font-size:12px;color:#8c967b;margin-top:15px;padding:8px}.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,20px);background:#304d3e;color:white;border-radius:12px;padding:13px 22px;box-shadow:0 6px 25px #304d3e26;opacity:0;pointer-events:none;z-index:10;font-size:13px;transition:opacity .2s,transform .2s;max-width:90%;text-align:center}.toast.visible{opacity:1;transform:translate(-50%,0)}.lesson-panel{border:1px solid #e1e5d7;border-radius:16px;padding:18px;background:#fbfcf5}.lesson-panel h2{font-size:14px;margin:0 0 13px}.piece-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.piece-pick{display:flex;flex-direction:column;align-items:center;padding:8px 2px;border:1px solid #e4e5d7;border-radius:10px;background:#f7f6ec}.piece-pick.active{border-color:#80996b;background:#e8efdd}.mini-piece{display:grid;place-items:center;width:35px;height:35px;border-radius:50%;background:#f4e6c5;color:#b7593d;box-shadow:0 2px 0 #d1b98d;font:700 23px var(--serif)}.piece-pick small{font-size:10px;margin-top:7px;color:#859174}.lesson-task{background:#f1f2e6;border-radius:10px;padding:12px;margin-top:14px;font-size:12px;color:#7d8a68}.lesson-task b{display:block;color:#617b4d;margin-bottom:5px}.lesson-progress{display:flex;gap:6px;margin:12px 0}.lesson-progress span{width:24px;height:4px;border-radius:4px;background:#dce3cf}.lesson-progress span.done{background:#91a776}.challenge-list{display:flex;flex-direction:column;gap:7px}.challenge-item{padding:10px;border-radius:9px;border:1px solid #e4e7da;text-align:left;font-size:12px;display:flex;gap:10px;align-items:center}.challenge-item.active{border-color:#8ca578;background:#edf3e3}.challenge-item small{display:block;font-size:9px;color:#9aa38a}.challenge-num{font-family:Georgia,serif;font-style:italic;font-size:19px;color:#a8b38d}.challenge-item>span:last-child{color:#c6a04c;margin-left:auto;font-size:15px}.learn-caption{font-size:10px;color:#9ba48c;margin:11px 0 0}.celebrate .piece{animation:pop .35s}.coach-card{transition:background .2s}.coach-card.success{background:#e5edda}.thinking .coach-panda{animation:breathe 2s infinite}body[data-mode=learn] .board-frame,body[data-mode=challenge] .board-frame{background:#e6dfc5}body[data-mode=learn] .learning-area,body[data-mode=challenge] .learning-area{gap:20px}
@keyframes blink{50%{opacity:.3}}@keyframes hello{from{transform:rotate(-15deg) translateY(8px);opacity:0}to{transform:rotate(-8deg);opacity:1}}@keyframes pop{50%{transform:translateY(-5px) scale(1.08)}}@keyframes breathe{50%{transform:rotate(-3deg) translateY(-3px)}}
@media(min-width:1440px){main{max-width:1280px}.game-layout{gap:40px;grid-template-columns:minmax(0,1.85fr) minmax(330px,1fr)}.play-area{padding-left:32px;padding-right:32px}.coach-card{padding:24px 28px}.coach-illustration{height:155px}.coach-panda{font-size:120px}.coach-card>p{font-size:13px}.difficulty-option{min-height:76px}.learning-area{gap:28px}.difficulty-option b{font-size:13px}.piece{font-size:34px}}
@media(max-width:1050px){.site-header{padding:0 28px}.main-nav{gap:2px}.main-nav button{padding:11px 13px;font-size:12px}.game-layout{gap:22px;grid-template-columns:minmax(0,1.6fr) minmax(275px,1fr)}main{padding:28px 28px 0}.play-area{padding:19px 17px 14px}.board-frame{padding:11px}.piece{font-size:27px}.board-tools{flex-wrap:wrap;gap:6px}.board-tools>button{padding:8px 6px;font-size:10px}.switch-label{font-size:9px}.tools-separator{display:none}.coach-card{padding:17px 18px}.coach-illustration{height:115px}.coach-panda{font-size:91px}.coach-card h2{font-size:18px}.coach-card>p{font-size:11px;min-height:65px}.learning-area{gap:20px}.difficulty-option{padding:11px 12px;min-height:66px}.level-rating{letter-spacing:1px}.level-check{margin-left:0}.path-intro{min-width:25%}.learning-path{gap:12px}.path-intro h2{font-size:11px}.path-symbol{font-size:26px}.path-step{gap:7px}.path-step b{font-size:10px}footer{padding:0 28px}.turn-indicator{font-size:10px;padding:5px 7px}}
@media(max-width:760px){.site-header{height:auto;min-height:83px;padding:17px 20px 12px;flex-wrap:wrap;gap:15px}.brand{font-size:20px}.brand-mark{width:40px;height:43px;font-size:29px}.brand small{font-size:8px;margin-top:5px}.header-actions{gap:9px}.main-nav{order:3;width:100%;justify-content:space-between;border-top:1px solid #e4e6da;padding-top:11px;gap:5px}.main-nav button{flex:1;padding:9px 4px;font-size:12px;border-radius:9px}.main-nav button span{font-size:17px;margin-right:3px}main{padding:23px 16px 0}.page-heading{margin-bottom:21px;gap:12px;align-items:flex-start}.eyebrow{font-size:9px;letter-spacing:2px;margin-bottom:3px}h1{font-size:23px;letter-spacing:0}.heading-spark{font-size:22px;margin-left:6px}.page-heading p{font-size:11px;margin-top:6px}.growth{padding:7px 10px;gap:6px;border-radius:10px;margin-top:13px;white-space:nowrap}.growth-icon{font-size:20px}.growth b{font-size:10px}.growth small{display:none}.game-layout{grid-template-columns:1fr;gap:22px}.play-area{padding:17px 16px 13px;border-radius:17px;max-width:540px;width:100%;margin:auto}.board-frame{padding:12px}.piece{font-size:clamp(21px,6.2vw,32px)}.board-topline{margin-bottom:15px}.river{font-size:20px;letter-spacing:7px}.board-tools{flex-wrap:nowrap;gap:2px}.board-tools>button{font-size:10px;padding:8px 4px}.board-tools .hint-button{padding:8px}.board-tools>button span{font-size:17px;margin-right:1px}.switch-label{gap:4px;font-size:9px}.switch{width:25px;height:16px}.switch:after{width:10px;height:10px}.switch-label input:checked+.switch:after{transform:translateX(9px)}.board-footnote{font-size:9px}.learning-area{display:grid;grid-template-columns:1fr 1fr;gap:16px}.coach-card{grid-column:1/-1;display:grid;grid-template-columns:110px 1fr;column-gap:13px;padding:17px 18px}.coach-title{grid-column:1/-1;font-size:11px}.coach-illustration{grid-row:2/5;grid-column:1;height:112px;margin:5px -7px 0}.coach-panda{font-size:82px}.orbit-one{width:110px;height:67px}.orbit-two{width:95px;height:80px}.floating-piece{left:0;bottom:8%;width:27px;height:27px;font-size:17px}.b-one{left:3%;font-size:20px}.floating-star{right:0;font-size:22px}.b-two{right:0}.coach-card h2{grid-column:2;text-align:left;font-size:17px;margin:8px 0 3px}.coach-card>p{grid-column:2;text-align:left;min-height:0;font-size:11px;line-height:1.9}.coach-action{grid-column:2;padding-top:10px;margin-top:10px;font-size:10px}.selected-rule{grid-column:1/-1}.difficulty-section,.lesson-panel{grid-column:1/-1}.difficulty-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.section-title{margin-bottom:10px}.difficulty-option{flex-direction:column;align-items:flex-start;gap:6px;min-height:0;padding:12px 10px}.level-icon{height:29px;width:29px;font-size:21px}.difficulty-option b{font-size:11px}.difficulty-option small{font-size:9px;white-space:nowrap}.level-rating{position:absolute;top:16px;right:8px;font-size:5px;letter-spacing:1px}.level-check{position:absolute;bottom:10px;right:9px;width:12px;height:12px;line-height:12px;font-size:8px}.daily-card{grid-column:1/-1;padding:14px 17px}.gentle-note{grid-column:1/-1;margin-top:-3px}.learning-path{margin:26px 0 20px;display:grid;grid-template-columns:1fr 1fr 1fr;padding:19px 0;gap:16px 5px}.path-intro{grid-column:1/-1}.path-intro h2{font-size:12px}.path-step{gap:7px;align-items:flex-start}.path-step b{font-size:10px}.path-step small{font-size:8px}.path-number{font-size:18px}.path-step>span:last-child{display:none}footer{padding:0 20px;flex-wrap:wrap;gap:8px;margin-bottom:19px}footer p{display:none}footer>span:last-child{font-size:8px}.player-strip{padding:15px 1px}.board-footnote{line-height:1.8}.lesson-panel{padding:16px}.piece-picker{grid-template-columns:repeat(7,1fr);gap:6px}.mini-piece{width:31px;height:31px;font-size:20px}.piece-pick small{font-size:9px}.lesson-task{font-size:11px}.challenge-list{display:grid;grid-template-columns:1fr 1fr}.challenge-item{font-size:11px;padding:8px}.challenge-item small{font-size:8px}}
@media(max-width:380px){h1{font-size:20px}.growth{padding:6px 7px}.growth b{font-size:9px}.heading-spark{font-size:18px}.play-area{padding:14px 10px 11px}.board-frame{padding:10px}.board-tools>button{font-size:9px}.board-tools>button span{font-size:15px}.switch-label{font-size:8px}.switch{width:23px}.difficulty-option small{font-size:8px}.difficulty-option{padding:10px 8px}.level-rating{right:5px}.level-check{right:5px}.piece-picker{grid-template-columns:repeat(4,1fr)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.point.target:before{content:'★';inset:auto -2px auto auto;top:-1px;width:20px;height:20px;border:0;background:#fff4c8;border-radius:50%;font-size:16px;line-height:20px;box-shadow:0 1px 4px #9f804833;z-index:4}.coach-card>p{font-size:14px;line-height:1.95;color:#536547}.selected-rule{font-size:12px}.coach-action{font-size:12px}.board-tools>button{font-size:12px}.lesson-task{font-size:13px}.learn-caption{font-size:11px}.challenge-item{font-size:13px}.piece-pick small{font-size:11px}.difficulty-option b{font-size:14px}.difficulty-option small{font-size:11px}.parent-note a{color:#647d4e;text-decoration:underline}
@media(max-width:1050px){.coach-card>p{font-size:13px}.board-tools>button{font-size:11px}.difficulty-option b{font-size:13px}}
@media(max-width:760px){.coach-card>p{font-size:13px}.coach-card{grid-template-columns:94px 1fr}.board-tools>button{font-size:10px}.difficulty-option b{font-size:12px}.difficulty-option small{font-size:9px}.challenge-item{font-size:12px}.piece-pick small{font-size:10px}}