@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) 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transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.grid{display:grid}.table{display:table}}:root{--ink:#18261f;--ink-soft:#526057;--paper:#f4f0e6;--paper-deep:#e8e0cd;--red:#b52b24;--red-dark:#7d1e1a;--gold:#c49b54;--green:#274e3b}*{box-sizing:border-box}html{background:#e7e1d4}body{color:var(--ink);background:radial-gradient(circle at 15% 5%, #c49b5421, transparent 26rem), linear-gradient(135deg, #274e3b0d, transparent 42%), var(--paper);margin:0;font-family:Noto Serif SC,Songti SC,Microsoft YaHei,serif}button{font:inherit}.page-shell{width:min(1180px,100% - 32px);min-height:100vh;margin:0 auto;padding:24px 0 18px}.topbar{border-bottom:1px solid #18261f1f;align-items:center;gap:13px;padding:8px 4px 20px;display:flex}.brand-mark{color:#f8ecd3;background:var(--red);border:2px solid var(--red-dark);border-radius:50% 48% 52% 46%;place-items:center;width:46px;height:46px;font-size:22px;font-weight:800;display:grid;box-shadow:inset 0 0 0 3px #ffffff2e}.eyebrow{color:var(--red);letter-spacing:.16em;margin:0 0 3px;font-size:11px;font-weight:700}.topbar h1{letter-spacing:.12em;margin:0;font-size:21px}.level-chip{color:var(--green);background:#274e3b14;border:1px solid #274e3b2e;border-radius:999px;margin-left:auto;padding:8px 13px;font-size:13px;font-weight:700}.hero{justify-content:space-between;align-items:flex-end;gap:24px;padding:34px 5px 27px;display:flex}.kicker{color:var(--gold);letter-spacing:.14em;align-items:center;gap:8px;font-size:13px;font-weight:800;display:inline-flex}.kicker:before{content:"";background:currentColor;width:28px;height:1px}.hero h2{letter-spacing:.08em;margin:9px 0 4px;font-size:clamp(35px,5vw,56px);line-height:1}.hero p{color:var(--ink-soft);margin:11px 0 0;font-size:15px}.progress-ring{width:102px;height:102px;box-shadow:inset 0 0 0 7px var(--paper), inset 0 0 0 8px #b52b241f;border:1px solid #b52b2447;border-radius:50%;flex:0 0 102px;place-items:center;display:grid}.progress-ring strong{color:var(--red);margin-top:17px;font-size:15px}.progress-ring span{color:var(--ink-soft);margin-bottom:17px;font-size:10px}.game-layout{grid-template-columns:minmax(0,1.4fr) minmax(270px,.6fr);align-items:start;gap:22px;display:grid}.board-card,.rule-card,.knowledge-card,.coming-card{background:#fffdf7b8;border:1px solid #18261f1c;box-shadow:0 18px 55px #242a2314}.board-card{border-radius:7px;padding:18px}.board-meta{justify-content:space-between;align-items:center;padding:0 2px 15px;display:flex}.player{align-items:center;gap:9px;display:flex}.player>div{display:grid}.player strong{font-size:13px}.player small{color:var(--ink-soft);margin-top:2px;font-size:10px}.player-red{text-align:right}.avatar{border-radius:50%;place-items:center;width:34px;height:34px;font-size:17px;font-weight:800;display:grid}.black-avatar{color:#e7dcc6;background:var(--ink)}.red-avatar{color:#fff0d4;background:var(--red)}.turn-indicator{color:var(--red);align-items:center;gap:6px;font-size:12px;font-weight:800;display:flex}.turn-indicator i{background:var(--red);border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 4px #b52b241f}.chess-board{background:linear-gradient(90deg,#69421c0a,#0000 16%,#69421c0a 37%,#0000 55%),#d9b67c;border:10px solid #6d4527;outline:2px solid #b0804b;width:min(100%,548px);margin:0 auto;padding:clamp(23px,5vw,36px);transition:box-shadow .25s;box-shadow:inset 0 0 28px #55301447,0 12px 26px #3826142e}.board-success{box-shadow:inset 0 0 32px #b52b2440,0 0 0 5px #b52b241f,0 16px 30px #3826142e}.board-field{aspect-ratio:8/9;background-image:repeating-linear-gradient(90deg,#472a14e6 0 1px,#0000 1px 12.5%),repeating-linear-gradient(#472a14e6 0 1px,#0000 1px 11.111%);border-bottom:1px solid #472a14e6;border-right:1px solid #472a14e6;width:100%;position:relative}.river{z-index:1;color:#65421f;letter-spacing:.35em;pointer-events:none;background:#d9b67c;border-top:1px solid #472a14e6;border-bottom:1px solid #472a14e6;justify-content:space-around;align-items:center;width:100%;height:11.12%;font-size:clamp(17px,4vw,29px);font-weight:700;display:flex;position:absolute;top:44.44%;left:0}.palace-line{z-index:1;pointer-events:none;transform-origin:50%;background:#472a14d9;width:25%;height:1px;position:absolute;left:37.5%}.top-left{top:11.11%;transform:rotate(41.6deg)}.top-right{top:11.11%;transform:rotate(-41.6deg)}.bottom-left{bottom:11.11%;transform:rotate(-41.6deg)}.bottom-right{bottom:11.11%;transform:rotate(41.6deg)}.intersection{z-index:3;cursor:pointer;touch-action:manipulation;background:0 0;border:0;border-radius:50%;width:clamp(28px,7vw,44px);height:clamp(28px,7vw,44px);padding:0;position:absolute;transform:translate(-50%,-50%)}.intersection.legal-target:after{content:"";background:#b52b24c2;border-radius:50%;position:absolute;inset:38%;box-shadow:0 0 0 5px #b52b2424}.intersection.hint-target:before{content:"";border:2px dashed var(--red);border-radius:50%;animation:1s infinite pulse;position:absolute;inset:3px}.piece{z-index:5;cursor:pointer;touch-action:manipulation;background:radial-gradient(circle at 38% 30%,#f6ddac,#c99659 76%);border:2px solid;border-radius:50%;place-items:center;width:clamp(33px,8vw,49px);height:clamp(33px,8vw,49px);padding:0;font-family:STKaiti,KaiTi,serif;font-size:clamp(20px,5vw,30px);font-weight:800;line-height:1;transition:transform .16s,box-shadow .16s;display:grid;position:absolute;transform:translate(-50%,-50%);box-shadow:inset 0 0 0 3px #e7c78e,0 3px 5px #3a231152}.piece.red{color:#a5201b}.piece.black{color:#17261e}.piece.selected{z-index:6;transform:translate(-50%,-50%)scale(1.12);box-shadow:inset 0 0 0 3px #f2d9a5,0 0 0 5px #b52b2433,0 7px 10px #3a23114d}.piece.hint-piece{animation:1s infinite piecePulse}.status-banner{min-height:48px;color:var(--green);border-left:3px solid var(--green);background:#274e3b0f;align-items:center;gap:10px;margin-top:16px;padding:10px 14px;display:flex}.status-banner.success{color:var(--red-dark);border-color:var(--red);background:#b52b2414}.status-banner p{margin:0;font-size:13px;font-weight:700}.status-icon{color:#fff;background:currentColor;border-radius:50%;flex:0 0 26px;place-items:center;width:26px;height:26px;font-size:0;display:grid}.status-icon:after{content:"棋";color:#fff;font-size:12px}.status-banner.success .status-icon:after{content:"✓"}.actions{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;display:grid}.actions button{cursor:pointer;touch-action:manipulation;border-radius:3px;min-height:47px;font-size:14px;font-weight:800}.actions button span{margin-right:5px}.secondary-btn{color:var(--green);background:0 0;border:1px solid #274e3b52}.primary-btn{color:#fff8e9;background:var(--red);border:1px solid var(--red-dark);box-shadow:0 4px 12px #b52b242e}.side-panel{gap:14px;display:grid}.rule-card{border-radius:6px;gap:14px;padding:18px;display:flex}.card-number{color:#b52b2452;font-size:34px;font-weight:800;line-height:1}.side-panel h3{margin:0 0 8px;font-size:17px}.side-panel p{color:var(--ink-soft);margin:0;font-size:13px;line-height:1.8}.knowledge-card{background:var(--green);border-color:var(--green);color:#f4eddb;border-radius:6px;padding:24px}.knowledge-card .eyebrow{color:#d8ba7c;margin-bottom:12px}.knowledge-card h3{font-size:22px}.knowledge-card p{color:#f4eddbb8}.lesson-tag{color:#e0c487;border-top:1px solid #ffffff21;margin-top:17px;padding-top:14px;font-size:11px}.coming-card{border-radius:6px;justify-content:space-between;align-items:center;padding:17px 18px;display:flex}.coming-card div{gap:3px;display:grid}.coming-card small{color:var(--ink-soft)}.coming-card strong{font-size:16px}.coming-card>span{color:var(--red);font-size:11px;font-weight:800}footer{color:#18261f85;justify-content:space-between;padding:22px 5px 0;font-size:11px;display:flex}@keyframes pulse{50%{opacity:.5}}@keyframes piecePulse{50%{box-shadow:inset 0 0 0 3px #f2d9a5,0 0 0 7px #b52b2447,0 7px 10px #3a23114d}}@media (max-width:780px){.page-shell{width:min(100% - 18px,610px);padding-top:11px}.topbar{padding-bottom:12px}.brand-mark{width:40px;height:40px}.topbar h1{font-size:18px}.hero{padding:24px 4px 20px}.hero p{max-width:260px;line-height:1.65}.progress-ring{flex-basis:82px;width:82px;height:82px}.progress-ring strong{margin-top:12px;font-size:13px}.progress-ring span{margin-bottom:12px}.game-layout{grid-template-columns:1fr}.board-card{padding:13px}.chess-board{border-width:7px;padding:clamp(18px,7vw,31px)}.side-panel{grid-template-columns:1fr 1fr}.knowledge-card{grid-row:span 2}}@media (max-width:510px){.level-chip{padding:6px 9px;font-size:11px}.hero h2{font-size:36px}.board-meta{padding-bottom:11px}.player small{display:none}.chess-board{width:100%}.side-panel{grid-template-columns:1fr}.knowledge-card{grid-row:auto}footer{padding-bottom:8px}}@media (prefers-reduced-motion:reduce){*,:before,:after{animation-duration:.01ms!important;animation-iteration-count:1!important}}