.personal-library{color:#202c32;max-width:980px;margin:0 auto;padding:24px 16px 40px;line-height:1.65}.personal-library h1{font-size:2rem;margin:8px 0 12px}.personal-library h2,.library-dialog h2{font-size:1.2rem;margin:0 0 12px}.personal-library h3{font-size:1.05rem;margin:0;overflow-wrap:anywhere}.personal-library p{margin:10px 0}.personal-library header{margin:24px 0}.library-eyebrow,.library-back{color:#196e6b;font-weight:700}.library-back{display:inline-flex;align-items:center;min-height:44px;text-underline-offset:5px}.library-access,.library-workspace,.library-preview,.library-backup{padding:24px;margin-top:24px;border:1px solid #c7d3cf;background:#fff;border-radius:8px}.library-workspace{border-top:4px solid #196e6b}.library-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.library-badge{font-size:.85rem;font-weight:700;color:#196e6b;background:#e8f2ee;padding:4px 10px;border-radius:4px}.library-dates,.library-muted{color:#586862;font-size:.9rem;overflow-wrap:anywhere}.library-feedback{min-height:1.65em;color:#196e6b;overflow-wrap:anywhere}.library-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.personal-library .library-button,.library-dialog .library-button{display:inline-flex;justify-content:center;align-items:center;min-height:44px;padding:8px 16px;border:1px solid #9bb5ad;border-radius:6px;background:#fff;color:#196e6b;font:inherit;font-weight:650;text-decoration:none;cursor:pointer}.personal-library .library-primary,.library-dialog .library-primary{background:#196e6b;color:#fff;border-color:#196e6b}.personal-library .library-button:disabled{opacity:.55;cursor:wait}.personal-library .library-button:hover:enabled,.library-dialog .library-button:hover{filter:brightness(.95)}.personal-library :focus-visible,.library-dialog :focus-visible{outline:3px solid #bb841d;outline-offset:3px}.library-preview ol{list-style:none;margin:0;padding:0}.library-preview li{display:flex;gap:20px;padding:14px 0;border-bottom:1px solid #e1e8e4}.library-preview li strong{flex:0 0 3em;color:#196e6b}.library-preview li span{min-width:0}.library-save{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;align-items:end}.library-save>button{grid-column:1 / -1;justify-self:start}.library-field{display:flex;flex-direction:column;gap:6px;font-size:.95rem;min-width:0}.library-field input{min-width:0;width:100%;box-sizing:border-box;min-height:44px;border:1px solid #9bb5ad;border-radius:4px;padding:8px 10px;font:inherit;background:#fff;color:#202c32}.library-tools{display:flex;flex-wrap:wrap;align-items:end;gap:20px;margin-top:28px}.library-tools .library-field{flex:1 1 200px}.library-check{display:inline-flex;gap:8px;align-items:center;min-height:44px}.library-check input{width:20px;height:20px;accent-color:#196e6b}.library-records{list-style:none;margin:0;padding:0}.library-records>li{padding:22px 0;border-top:1px solid #d8e0dc}.library-empty{color:#586862}.library-dialog{max-width:480px;width:calc(100% - 48px);box-sizing:border-box;border:1px solid #9bb5ad;border-radius:8px;padding:24px;color:#202c32;line-height:1.65}.library-dialog::backdrop{background:#18292370}.library-dialog .library-field{margin:12px 0}@media(max-width:600px){.personal-library{padding:12px 0 28px}.library-access,.library-workspace,.library-preview,.library-backup{padding:18px}.library-save{grid-template-columns:minmax(0,1fr)}.library-save>button{width:100%}.library-actions .library-button{flex:1 1 auto}}.xiangqi-board{position:relative;width:100%;aspect-ratio:9 / 10;margin:0 auto 1.25rem;border:1px solid #ae8c54;border-radius:5px;background:#f4e5c7;container-type:inline-size}.xiangqi-board__lines{position:absolute;inset:0;width:100%;height:100%;stroke:#8c6f40;stroke-width:2}.xiangqi-board__lines text{font:30px Songti SC,SimSun,serif;text-anchor:middle;fill:#80663e;stroke:none}.xiangqi-board__square{position:absolute;display:grid;place-items:center;width:11.1111%;height:10%;transform:translate(-50%,-50%);padding:0;border:0;border-radius:0;background:transparent;cursor:pointer;touch-action:manipulation}.xiangqi-board__piece{display:grid;place-items:center;width:87%;aspect-ratio:1;border:2px solid currentColor;border-radius:50%;background:#fff2d9;box-shadow:0 2px 2px #5c45212b,inset 0 0 0 2px #fff2d9,inset 0 0 0 3px #d6bf91;color:#273535;font:700 clamp(16px,5.9cqw,38px) "Songti SC","STSong","SimSun",serif}.is-red .xiangqi-board__piece{color:#a52926}.xiangqi-board__square.is-last{background:#b6913a28}.xiangqi-board__square.is-selected{background:#176b6938;outline:2px solid #176b69;outline-offset:-3px}.xiangqi-board__square.is-pending{background:#176b6948;outline:3px solid #176b69;outline-offset:-3px}.is-target.has-piece:after{content:"";position:absolute;inset:3%;border:2px dashed #176b69;border-radius:50%}.xiangqi-board__target{width:22%;aspect-ratio:1;border-radius:50%;background:#176b69;box-shadow:0 0 0 3px #fff9}.xiangqi-board__files{position:absolute;inset:100% 0 auto;display:grid;grid-template-columns:repeat(9,1fr);color:#66736c;font-size:11px;text-align:center;line-height:1.25rem}.xiangqi-board__ranks{position:absolute;inset:0 auto 0 -16px;display:grid;grid-template-rows:repeat(10,1fr);align-items:center;color:#66736c;font-size:10px}:root{color:#17212b;background:#f2f6f5;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;line-height:1.65;--primary: #176b69;--muted: #5c6d67;--border: #cfdad6}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #005fcc;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:2.5rem;line-height:1.2;margin-bottom:1rem;letter-spacing:.02em}h1:focus{outline:none}h2{font-size:1.35rem;line-height:1.4;margin-bottom:.75rem}h3{font-size:1.15rem;line-height:1.5;margin-bottom:.5rem}p{margin-bottom:1rem}svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.content{width:min(100%,68rem);margin:0 auto;padding:2.25rem 1.5rem 3rem;min-height:calc(100dvh - 10rem)}.content:focus{outline:none}.topbar{display:flex;align-items:center;gap:2rem;width:min(100%,72rem);margin:0 auto;padding:1rem 1.5rem;border-bottom:1px solid var(--border)}.brand{display:inline-flex;align-items:center;gap:.65rem;color:#17212b;font-size:1.1rem;white-space:nowrap}.brand__mark{display:grid;place-items:center;width:40px;height:40px;background:#e3a624;border:2px solid #17212b;border-radius:50%;font:700 1.4rem Songti SC,serif}.brand-link{text-decoration:none}.topbar__status{margin-left:auto;color:var(--primary);font-size:.8rem;font-weight:600}.desktop-navigation nav{display:flex;gap:.5rem}.desktop-navigation a{display:flex;align-items:center;gap:.4rem;min-height:44px;padding:.5rem .9rem;text-decoration:none;color:#34473f;border-radius:6px}.desktop-navigation a[aria-current=page]{background:#e2eeea;color:var(--primary);font-weight:650}.desktop-navigation svg{width:20px;height:20px}.icon-button{display:inline-grid;place-items:center;width:44px;height:44px;padding:10px;background:#fff;color:#17212b;border:1px solid var(--border);border-radius:50%;cursor:pointer;flex-shrink:0}.icon-button svg{width:24px;height:24px}.menu-trigger{display:none}.page-heading{margin-bottom:2rem;max-width:48rem}.eyebrow{color:var(--primary);font-size:.8rem;font-weight:700;margin-bottom:.6rem;letter-spacing:.04em}.lead{font-size:1.05rem;color:var(--muted);margin-bottom:0}.muted{color:var(--muted)}.small{font-size:.875rem}.button{display:inline-flex;justify-content:center;align-items:center;gap:.75rem;min-height:44px;padding:.65rem 1.1rem;border:1px solid var(--primary);border-radius:6px;color:#fff;background:var(--primary);font-weight:650;line-height:1.4;text-decoration:none;cursor:pointer}.button:hover:not(:disabled){background:#105350}.button.secondary{color:var(--primary);background:#fff}.button.secondary:hover:not(:disabled),.button.secondary[aria-pressed=true]{background:#e2eeea}.button:disabled{opacity:.48;cursor:default}.text-link,.back-link,.text-button{color:var(--primary);text-decoration:none;font-weight:650}.text-link,.back-link{display:inline-flex;align-items:center;min-height:44px;gap:.5rem}.text-link:hover,.back-link:hover{text-decoration:underline;text-underline-offset:4px}.text-button{border:0;background:transparent;padding:.5rem;min-height:44px;cursor:pointer}.back-link{margin-bottom:1.5rem}.play-invitation{display:flex;justify-content:space-between;align-items:center;gap:1.5rem;padding:2rem;border:1px solid var(--border);border-top:4px solid var(--primary);border-radius:6px;background:#fff;margin-bottom:3rem}.play-invitation h2{font-family:Songti SC,STSong,serif;font-size:1.65rem}.play-invitation p:not(.eyebrow){color:var(--muted)}.invitation-piece{flex-shrink:0;display:grid;place-items:center;width:112px;aspect-ratio:1;border:3px solid #a52926;border-radius:50%;background:#fcf1dc;color:#a52926;font:700 4rem Songti SC,serif;box-shadow:inset 0 0 0 5px #fcf1dc,inset 0 0 0 6px #ba6c58}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.section-heading h2{margin:0}.section-heading>.muted{font-size:.8rem}.topic-row{display:grid;grid-template-columns:2.5rem minmax(0,1fr) 1.5rem;gap:1rem;padding:1.5rem 0;border-bottom:1px solid var(--border);color:inherit;text-decoration:none}.topic-row:hover h3,.progress-row:hover strong{color:var(--primary)}.topic-row p{margin-bottom:.5rem}.topic-row p:not(.eyebrow){color:var(--muted)}.topic-row__number{font-family:Georgia,serif;color:#718980;font-size:1.4rem}.topic-row__meta{color:var(--primary);font-size:.8rem}.row-arrow{color:var(--primary)}.learning-note{border-left:3px solid #a9c4bb;margin-top:2rem;padding:.5rem 0 .5rem 1.25rem}.learning-note p:last-child{margin:0;color:var(--muted)}.endgame-invitation{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.5rem;margin-top:2.5rem;border:1px solid var(--border);border-left:4px solid var(--primary);background:#fff;border-radius:6px;color:inherit;text-decoration:none}.endgame-invitation h2,.endgame-card h2{font-family:Songti SC,STSong,serif;font-size:1.6rem}.endgame-invitation p:not(.eyebrow){color:var(--muted);margin-bottom:.5rem}.endgame-invitation:hover h2,.endgame-card:hover h2{color:var(--primary)}.endgame-summary{display:flex;flex-wrap:wrap;gap:1rem 2rem;padding:1rem 0;margin-bottom:1rem;border-block:1px solid var(--border);color:var(--muted)}.endgame-summary strong{color:var(--primary);margin-left:.4rem}.endgame-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.5rem}.endgame-card{display:flex;flex-direction:column;padding:1.5rem;border:1px solid var(--border);border-radius:6px;background:#fff;color:inherit;text-decoration:none}.endgame-card>p{color:var(--muted)}.endgame-card__top,.endgame-card__bottom{display:flex;align-items:center;justify-content:space-between;gap:.75rem;font-size:.8rem}.endgame-card__top{margin-bottom:1rem}.endgame-card__top .eyebrow{margin:0}.endgame-state{color:var(--primary);white-space:nowrap}.endgame-card__bottom{padding-top:1rem;margin-top:auto;color:var(--primary)}.endgame-card__bottom>span:first-child{color:var(--muted)}.endgame-achievements{color:var(--primary)}.reference-move{margin:1rem 0 0}.endgame-source{padding:0 .25rem}.panel{padding:1.25rem;border:1px solid var(--border);border-radius:6px;background:#fff;margin-bottom:1.5rem}.panel>p:last-child{margin-bottom:0}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:.75rem}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin:0 0 2rem;border-block:1px solid var(--border)}.stats>div{padding:1.25rem;border-right:1px solid var(--border);display:flex;flex-direction:column-reverse}.stats>div:last-child{border:0}.stats dt{font-size:.85rem;color:var(--muted)}.stats dd{margin:0;font-size:1.8rem;font-weight:700}.stats small{font-size:.85rem;font-weight:400;color:var(--muted)}.progress-list{margin:2.5rem 0}.progress-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0;border-bottom:1px solid var(--border);color:inherit;text-decoration:none}.progress-row .small{display:block;margin-top:.25rem}.lesson{max-width:46rem;margin:0 auto}.lesson__reading{margin-bottom:2rem;line-height:1.9}.lesson__practice{max-width:36rem;margin:0 auto;padding:1.25rem;background:#fff;border:1px solid var(--border);border-radius:6px}.lesson__practice>p{margin-bottom:1.25rem}.move-dock{display:flex;justify-content:space-between;align-items:center;gap:.75rem;padding:.75rem 0;border-bottom:1px solid var(--border)}.move-dock>span{font-size:.85rem;color:var(--muted)}.move-dock .button{flex-shrink:0}.move-dock .text-button{font-size:.8rem}.feedback,.hint,.storage-warning{padding:.8rem 1rem;margin:1rem 0;background:#fff7e2;border-left:3px solid #d4a43c;font-size:.9rem}.feedback.success{background:#e2eeea;border-color:var(--primary)}.play-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(16rem,.8fr);gap:2.5rem;align-items:start}.board-workspace{min-width:0;padding-left:1rem;scroll-margin-top:80px}.board-heading{display:flex;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:1rem;font-size:.9rem}.board-heading>.muted{white-space:nowrap;font-size:.8rem}.game-actions{margin-top:1rem}.mode-options{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:.8rem}.review-controls{display:flex;align-items:center;justify-content:space-between;gap:.5rem}.review-controls .button{padding:.55rem .7rem}.move-list{padding-left:1.25rem;font-size:.8rem;line-height:1.9;color:var(--muted);margin-bottom:0}.site-footer{display:flex;justify-content:space-between;gap:1rem;width:min(100%,68rem);margin:0 auto;padding:1.5rem;color:var(--muted);border-top:1px solid var(--border);font-size:.75rem}.drawer{position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;width:min(21rem,calc(100% - 3rem));height:100dvh;max-height:none;max-width:none;margin:0;padding:max(1rem,env(safe-area-inset-top)) 1rem max(1rem,env(safe-area-inset-bottom));overflow-y:auto;overscroll-behavior:contain;background:#f2f6f5;border:0;border-right:1px solid var(--border);box-shadow:12px 0 40px #17212b20}.drawer:not([open]){display:none}dialog::backdrop{background:#17212b55}.drawer__header{display:flex;justify-content:space-between;align-items:center;gap:.5rem}.drawer__motto{font-size:.875rem;margin:1.5rem 0 2rem}.drawer nav{display:grid;gap:.5rem}.drawer nav a{display:flex;align-items:center;gap:1rem;min-height:56px;padding:.75rem 1rem;border:1px solid transparent;border-radius:8px;color:#34473f;text-decoration:none;font-weight:650}.drawer nav a[aria-current=page]{background:#e2eeea;border-color:#b5d1ca;color:var(--primary)}.drawer nav svg{width:24px;height:24px}.drawer__footer{margin-top:auto;padding-top:2rem}.confirm-dialog{width:min(28rem,calc(100% - 2rem));padding:1.5rem;border:1px solid var(--border);border-radius:8px;background:#fff;color:inherit}.confirm-dialog .actions{justify-content:flex-end}.skip-link{position:fixed;top:-10rem;left:1rem;z-index:100;background:#fff;color:var(--primary);padding:.75rem}.skip-link:focus{top:.5rem}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}@media(max-width:759px){.topbar{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:.5rem;padding:calc(.5rem + env(safe-area-inset-top)) 1rem .5rem;background:#f2f6f5}.menu-trigger{display:inline-grid}.topbar>.brand-link{justify-self:center}.topbar>.brand-link .brand__mark{display:none}.topbar__status{grid-column:3;font-size:10px;line-height:1.35;text-align:center}.desktop-navigation{display:none}.content{padding:1.75rem 1rem 2.5rem}h1{font-size:2rem}.page-heading{margin-bottom:1.5rem}.lead{font-size:1rem}.play-invitation{padding:1.25rem;margin-bottom:2rem}.play-invitation h2{font-size:1.35rem}.invitation-piece{display:none}.topic-row{grid-template-columns:1.8rem minmax(0,1fr) 1rem;gap:.5rem}.topic-row h3{font-size:1.1rem}.topic-row p{font-size:.9rem}.endgame-grid{grid-template-columns:minmax(0,1fr)}.endgame-card,.endgame-invitation{padding:1.25rem}.stats>div{padding:1rem .5rem}.stats dd{font-size:1.6rem}.stats small{font-size:.75rem}.panel{padding:1rem}.play-layout{grid-template-columns:minmax(0,1fr);gap:1.5rem}.board-workspace{max-width:34rem;width:100%;margin:0 auto}.board-workspace>.xiangqi-board{max-width:min(100%,calc((100dvh - 285px)*.9))}.lesson__practice{padding:1rem}.lesson__practice .section-heading{gap:.5rem}.lesson__practice h2{font-size:1.1rem}.site-footer{font-size:.7rem;padding-bottom:max(1.5rem,env(safe-area-inset-bottom))}}@media(max-height:500px)and (max-width:959px){.play-layout{grid-template-columns:minmax(0,1fr) minmax(14rem,1fr)}.board-workspace>.xiangqi-board{max-width:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important}}.lesson__followup{margin-top:1rem}.lesson__practice h2{scroll-margin-top:5rem}
