:root{color-scheme:light;--paper:#fffdf7;--cream:#f5f0e5;--ink:#26372f;--muted:#748078;--green:#386653;--mint:#dcebdd;--coral:#c9624f;--gold:#efd19a;--line:#dce0d4;--shadow:0 18px 55px #64553713;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{min-width:320px;background:var(--cream)}body{margin:0;min-width:320px;min-height:100dvh;background:radial-gradient(ellipse at 3% 3%,#e2ecdf 0,transparent 35%),radial-gradient(ellipse at 95% 15%,#f7dfbe 0,transparent 36%),var(--cream);color:var(--ink);-webkit-tap-highlight-color:transparent}button,input,select{font:inherit;color:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.46}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d48939;outline-offset:3px}[hidden]{display:none!important}button{border:0}button:not(:disabled):active{transform:translateY(1px)}.shell{width:min(1240px,calc(100% - 48px));margin:auto;padding-bottom:max(22px,env(safe-area-inset-bottom))}.topbar{min-height:86px;display:flex;gap:12px;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;min-height:44px;font-size:14px;font-weight:850}.brand b{background:var(--green);color:#fff8dc;width:37px;height:37px;display:grid;place-items:center;border-radius:12px;transform:rotate(-5deg);font:850 15px Georgia,serif}.topright{display:flex;align-items:center;gap:10px}.backlink{font-size:12px;font-weight:750;text-decoration:none;min-height:44px;display:flex;align-items:center}.connection{font-size:11px;white-space:nowrap;display:flex;align-items:center;gap:7px;border:1px solid #ffffffcc;background:#ffffff99;border-radius:30px;padding:10px 12px}.connection:before{content:"";width:7px;height:7px;border-radius:50%;background:#c69447}.connection[data-state="online"]:before{background:#4b9874}.connection[data-state="offline"]:before,.connection[data-state="error"]:before{background:#d56855}.hero{position:relative;overflow:hidden;background:#fffdf7bf;border:1px solid #ffffff;border-radius:30px;padding:38px 42px;margin-bottom:18px;box-shadow:var(--shadow);display:grid;grid-template-columns:1.15fr .8fr;align-items:center;gap:24px}.eyebrow{font-size:10px;font-weight:850;letter-spacing:.17em;color:var(--green);margin:0 0 13px}.hero h1{font-family:"Noto Serif SC","Songti SC","STSong",serif;font-size:clamp(40px,5vw,66px);line-height:1.15;letter-spacing:-.035em;margin:0}.hero h1 span{display:block;color:var(--green)}.hero-description{max-width:500px;font-size:14px;line-height:1.9;color:#66736a;margin:17px 0 0}.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.tag{font-size:10px;font-weight:750;padding:8px 11px;border:1px solid var(--line);border-radius:8px;background:#fffef7}.hero-art{min-height:230px;display:grid;place-items:center;position:relative}.hero-art:before{content:"";position:absolute;inset:5px 25px;background:#e4ecdc;border-radius:50%;transform:rotate(-12deg);box-shadow:22px 15px 0 #f0d7b365}.art-caption{position:absolute;bottom:4px;left:0;right:0;text-align:center;font:10px ui-monospace,monospace;letter-spacing:.12em;color:#6f7f6a}.art-pieces{position:relative;display:flex;align-items:center;gap:8px;transform:rotate(-9deg)}.art-piece{width:100px;height:100px;display:grid;place-items:center;border-radius:50%;border:6px double #bd8151;background:radial-gradient(circle at 35% 25%,#fff0c9,#e8bf84);box-shadow:2px 8px 0 #b78348,7px 19px 22px #79552c25;font:700 65px "KaiTi","STKaiti",serif;color:#ab4032}.art-piece:last-child{transform:translateY(-24px) rotate(16deg);color:#394e3c}.art-tic{display:grid;grid-template-columns:repeat(3,56px);gap:6px;position:relative;transform:rotate(-9deg);padding:12px;border-radius:15px;background:#c9dbcd;box-shadow:8px 14px 0 #adc3ad}.art-tic span{display:grid;place-items:center;width:56px;height:56px;background:#fffdf6;border-radius:6px;font-size:38px;font-weight:750;color:var(--coral)}.art-tic span:nth-child(even){color:var(--green)}.art-mines{display:grid;grid-template-columns:repeat(4,42px);gap:5px;position:relative;transform:rotate(-9deg);padding:10px;border-radius:15px;background:#b9cfc0;box-shadow:8px 13px 0 #9eb4a3}.art-mines span{display:grid;place-items:center;width:42px;height:42px;background:#e6eee1;border-radius:5px;font-size:25px;font-weight:800;color:#5084a8}.art-mines span:nth-child(3n){background:#fff9ea;color:var(--coral)}.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card{border:1px solid #fff;border-radius:24px;background:var(--paper);box-shadow:var(--shadow);padding:24px;min-width:0}.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px}.card h2{font-size:20px;margin:0;letter-spacing:-.035em}.step{font:12px ui-monospace,monospace;color:#8a958b;border:1px solid var(--line);padding:5px 7px;border-radius:6px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}label{display:grid;gap:7px;font-size:11px;font-weight:750;color:#6c786f}input,select{min-width:0;width:100%;min-height:48px;border:1px solid var(--line);background:#fbfbf5;border-radius:10px;padding:0 13px;font-size:14px;outline:none}input:focus,select:focus{border-color:#79a58a;background:#fff}input::placeholder{color:#adb3a9}input.code-input{text-transform:uppercase;letter-spacing:.18em}.full{grid-column:1/-1}.btn{min-height:45px;border-radius:10px;padding:0 16px;font-size:12px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none;background:#edf0e5;border:1px solid #dfe4d7}.btn-primary{background:var(--green);color:#fffcef;border-color:var(--green);box-shadow:0 5px 0 #244d3c13}.btn-soft{background:#e4eddc;border-color:#d3e0c9;color:#3d664e}.btn-danger{color:#a34a3e;background:#fcf0e9;border-color:#f1dcd0}.form-submit{width:100%;margin-top:15px}.form-foot{font-size:11px;color:#8a9186;margin:12px 0 0;line-height:1.5}.message{font-size:12px;line-height:1.7;margin:12px 0 0;color:#a34a3e}.message:empty{display:none}.service-notice{display:flex;align-items:center;gap:10px;justify-content:space-between;padding:13px 17px;margin:0 0 16px;border:1px solid #ecd9b7;border-radius:13px;background:#fff7e3;color:#926637;font-size:12px;line-height:1.6}.service-notice button{flex:0 0 auto;min-height:44px;padding:0 12px;border-radius:8px;background:#ffffffa8;color:#795526;font-size:11px;font-weight:800}.footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:26px;color:#8a9287;font-size:10px;line-height:1.7}.footer a{text-underline-offset:3px}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 302px;gap:20px;align-items:start}.play-card{padding:25px}.play-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:18px}.play-head .eyebrow{margin-bottom:5px;font-size:9px}.play-head h1{font-family:"Noto Serif SC","Songti SC",serif;font-size:30px;margin:0;letter-spacing:-.04em}.turn-chip{font-size:11px;font-weight:800;background:#e3edda;color:#4f7045;padding:10px 12px;border-radius:25px;white-space:nowrap}.turn-chip.urgent{color:#b44835;background:#ffebe1}.turn-chip.finished{color:#675084;background:#ebe4f2}.board-shell{position:relative;max-width:640px;margin:auto}.board-caption{display:flex;gap:10px;justify-content:space-between;align-items:center;margin:15px 0 0;min-height:44px;color:#788375;font-size:11px;line-height:1.6}.board-caption .btn{font-size:10px;padding:0 10px;flex-shrink:0}.status-box{margin-top:15px;padding:13px 15px;background:#f1f4e9;border:1px solid #e3e9d9;border-radius:12px;font-size:13px;font-weight:700;line-height:1.7}.status-box.win{background:#e2f1df;color:#3d743c}.status-box.lose{background:#fbeae3;color:#a3533e}.side-stack{display:grid;gap:14px}.side-stack .card{padding:19px;border-radius:20px}.side-title{font-size:10px;font-weight:850;letter-spacing:.08em;color:#899284;margin:0 0 6px}.room-code{font:800 34px ui-monospace,Consolas,monospace;letter-spacing:.12em;margin:0 0 12px;color:#3d664e}.room-tools{display:grid;grid-template-columns:1fr 1fr;gap:7px}.room-tools .btn{font-size:10px;padding:0 7px}.players{display:grid;gap:10px}.player{padding:11px;border:1px solid #e3e6da;background:#f7f8ef;border-radius:12px;display:grid;grid-template-columns:35px minmax(0,1fr) auto;align-items:center;gap:9px}.player.active{background:#edf3e4;border-color:#a8c497;box-shadow:inset 3px 0 #78a266}.player-avatar{width:35px;height:35px;border-radius:50%;background:#deead8;display:grid;place-items:center;color:#426741;font-size:17px;font-weight:800}.player-avatar.red,.player-avatar.X{color:#b64e3e;background:#f3e0d1}.player-avatar.black,.player-avatar.O{color:#375949;background:#dce6d7}.player-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:800}.player-detail{color:#899183;font-size:10px;line-height:1.7;margin-top:2px}.player-badge{font-size:9px;color:#739066;white-space:nowrap}.player-progress{grid-column:1/-1;height:5px;background:#e0e5d7;border-radius:5px;overflow:hidden}.player-progress span{height:100%;display:block;background:#83a56e;border-radius:5px;transition:width .25s}.waiting-player{padding:20px 10px;text-align:center;border:1px dashed #cfd8c4;border-radius:12px;color:#97a08e;font-size:11px}.room-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.room-actions .btn{padding:0 8px}.rules{font-size:11px;line-height:1.9;color:#7a8474;margin:10px 0 0;padding-left:17px}.rule-note{font-size:10px;line-height:1.8;color:#9c9f91;margin:12px 0 0}.record{max-height:150px;overflow:auto;font-size:11px;color:#829077;line-height:1.9;scrollbar-width:thin}.record ol{margin:0;padding-left:24px}.record .empty{margin:0}.result-banner{padding:17px;background:#e7eedc;border:1px solid #d5e0c4;border-radius:15px;margin-bottom:14px;text-align:center}.result-banner strong{display:block;font-size:21px;color:#416038;margin-bottom:5px}.result-banner p{font-size:11px;line-height:1.7;color:#7a846b;margin:0}.toast{position:fixed;z-index:50;left:50%;bottom:28px;transform:translate(-50%,20px);max-width:calc(100% - 32px);width:max-content;background:#294633;color:#fffbea;border:1px solid #4c6950;box-shadow:0 8px 35px #273d3330;padding:13px 19px;border-radius:12px;font-size:12px;line-height:1.6;opacity:0;pointer-events:none;transition:opacity .18s,transform .18s}.toast.visible{opacity:1;transform:translate(-50%,0)}.xiangqi-board{container-type:inline-size;display:grid;grid-template-columns:repeat(9,minmax(0,1fr));aspect-ratio:9/10;position:relative;padding:0;background:linear-gradient(105deg,#f2d4a0,#f8e0b7 54%,#eec895);border:9px solid #b98a59;border-radius:12px;box-shadow:inset 0 0 22px #b581443d,0 8px 0 #a879451c;overflow:hidden}.xq-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.xq-lines line,.xq-lines path{stroke:#a87b45;stroke-width:1;fill:none;vector-effect:non-scaling-stroke}.xq-lines text{fill:#a27645;font:21px "STKaiti","KaiTi",serif;letter-spacing:8px}.xq-square{position:relative;min-height:0;min-width:0;border:0;border-radius:0;padding:3%;display:grid;place-items:center;background:transparent;isolation:isolate;aspect-ratio:1}.xq-square:disabled{opacity:1;cursor:default}.xq-piece{display:grid;place-items:center;position:relative;z-index:2;width:88%;height:88%;border-radius:50%;border:3px double #ae784a;box-shadow:0 3px 0 #b9864d,1px 5px 6px #83572636;background:radial-gradient(circle at 30% 20%,#fff1ce,#e9c38d);font:700 clamp(16px,5.6cqw,39px)/1 "KaiTi","STKaiti","Noto Serif SC",serif;color:#304a36;pointer-events:none;user-select:none}.xq-piece.red{color:#b14432}.xq-square.selected .xq-piece{outline:3px solid #528348;outline-offset:1px;transform:translateY(-3px);box-shadow:0 6px 0 #b9864d,1px 8px 8px #83572636}.xq-square.last:before{content:"";position:absolute;inset:6%;border:2px solid #bb7e3f80;border-radius:13px;background:#edab3726}.xq-square.legal:after{content:"";position:absolute;z-index:3;width:21%;height:21%;border-radius:50%;background:#4c864f;box-shadow:0 0 0 4px #ecf2d281}.xq-square.legal.has-piece:after{width:90%;height:90%;border:3px solid #729358;background:transparent;box-shadow:none}.xq-square.checked .xq-piece{outline:3px solid #c54b35;outline-offset:2px}.xq-square:focus-visible{z-index:4;outline-offset:-3px}.tic-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;background:#d3dfcc;padding:18px;border:1px solid #c5d4bb;border-radius:24px;max-width:490px;aspect-ratio:1;margin:26px auto 24px;box-shadow:0 8px 0 #c6d1bc}.tic-cell{aspect-ratio:1;min-width:0;border-radius:15px;background:#fffdf5;box-shadow:0 4px 0 #b9c9b0;display:grid;place-items:center;font:800 clamp(42px,9vw,92px)/1 system-ui,sans-serif;color:#c75f48;transition:background .15s,transform .15s}.tic-cell:disabled{opacity:1;cursor:default}.tic-cell.O{color:#497154}.tic-cell.winning{background:#f9de9a;box-shadow:0 4px 0 #d8b26d}.tic-cell.last:not(.winning){background:#edf2df}.tic-cell:not(:disabled):hover{background:#f3f1de}.mine-tools{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}.mine-stats{display:flex;gap:14px;font-size:12px;font-weight:850;color:#547046}.mode-group{display:inline-flex;padding:3px;background:#ebf0e3;border:1px solid #dae4d2;border-radius:11px;gap:2px}.mode-group button{min-height:44px;padding:0 12px;border-radius:8px;font-size:11px;font-weight:800;background:transparent;color:#879179}.mode-group button[aria-pressed="true"]{background:#fffefa;box-shadow:0 2px 7px #50623915;color:#41623a}.mine-board{display:grid;grid-template-columns:repeat(var(--cols,9),minmax(0,1fr));gap:4px;padding:11px;border:1px solid #b9cdb0;border-radius:13px;background:#c9dac0;box-shadow:0 6px 0 #adc29f;user-select:none;-webkit-user-select:none}.mine-cell{aspect-ratio:1;min-width:0;min-height:0;border-radius:5px;background:linear-gradient(145deg,#eff3e3,#dfe9d4);box-shadow:0 2px 0 #a6be97;display:grid;place-items:center;font-size:clamp(13px,2.5vw,22px);font-weight:850;padding:0;color:#45719d}.mine-cell:disabled{opacity:1;cursor:default}.mine-cell.open{background:#dae4cc;box-shadow:none;cursor:default}.mine-cell.flag{color:#b95742;background:#fff0c6}.mine-cell.mine{background:#eeb5a2;color:#a33831}.mine-cell.n2{color:#4c8654}.mine-cell.n3{color:#c35c43}.mine-cell.n4{color:#8870a5}.mine-cell.n5,.mine-cell.n6,.mine-cell.n7,.mine-cell.n8{color:#935138}.mine-cell:not(:disabled):not(.open):hover{background:#fffbed}.board-paused{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}.board-paused span{max-width:90%;text-align:center;padding:12px 18px;border-radius:12px;color:#496440;background:#fffff3eb;box-shadow:0 6px 25px #58693a26;font-size:12px;font-weight:800}.skip-link{position:fixed;top:8px;left:8px;z-index:99;transform:translateY(-160%);padding:12px;background:#efd19a;border-radius:10px}.skip-link:focus{transform:none}
@media(min-width:1100px){.game-layout[data-game="tictactoe"]{grid-template-columns:minmax(0,1fr) 322px}.game-layout[data-game="xiangqi"] .play-card{padding:22px 38px}}
@media(max-width:850px){.shell{width:calc(100% - 28px)}.hero{padding:29px;grid-template-columns:1.2fr .8fr}.hero-art{transform:scale(.8);min-height:205px}.game-layout{grid-template-columns:minmax(0,1fr) 255px;gap:13px}.play-card{padding:16px}.side-stack .card{padding:15px}.play-head h1{font-size:27px}.turn-chip{font-size:10px;padding:9px}.xiangqi-board{border-width:7px}.xq-piece{border-width:2px}.backlink{display:none}}
@media(max-width:680px){.shell{width:calc(100% - 24px)}.topbar{min-height:66px}.brand{font-size:12px;gap:8px}.brand b{width:32px;height:32px;border-radius:10px}.connection{font-size:9px;padding:8px 9px}.hero{border-radius:23px;padding:27px 23px;grid-template-columns:1fr;gap:0;min-height:270px}.hero h1{font-size:43px}.hero-description{font-size:12px;max-width:78%;line-height:1.8}.hero .eyebrow{font-size:8px}.hero-art{position:absolute;right:-77px;bottom:16px;transform:rotate(-8deg) scale(.5);transform-origin:center;opacity:.82;width:240px;pointer-events:none}.art-caption{display:none}.hero .tags{max-width:85%;gap:5px;margin-top:16px}.tag{font-size:9px;padding:6px 8px}.entry-grid{grid-template-columns:1fr;gap:13px}.card{padding:20px;border-radius:20px}.card-head{margin-bottom:16px}.card h2{font-size:18px}.game-layout{grid-template-columns:1fr;gap:14px}.play-card{padding:15px;border-radius:21px}.play-head{margin-bottom:15px}.play-head h1{font-size:26px}.play-head .eyebrow{font-size:8px}.side-stack{grid-template-columns:1fr 1fr;gap:10px}.side-stack .card{padding:15px;border-radius:17px}.side-stack .players-card,.side-stack .actions-card,.side-stack .rules-card,.side-stack .records-card{grid-column:1/-1}.side-stack .room-card{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.3fr;gap:10px;align-items:center}.room-code{font-size:28px;margin:0}.room-tools .btn{font-size:10px}.players{grid-template-columns:1fr 1fr;gap:8px}.player{padding:10px 8px;grid-template-columns:29px minmax(0,1fr);gap:7px}.player-avatar{width:29px;height:29px;font-size:15px}.player-badge{grid-column:2}.player-progress{margin-top:2px}.player-name{font-size:11px}.player-detail{font-size:9px}.waiting-player{display:grid;place-items:center}.rules{margin:0;font-size:11px}.rules-card summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font-size:12px;font-weight:800}.rules-card summary:after{content:"＋";margin-left:auto}.rules-card details[open] summary:after{content:"−"}.board-caption{margin-top:9px;font-size:10px;gap:8px}.xq-piece{font-size:clamp(16px,5.7cqw,30px)}.xiangqi-board{border-width:6px;border-radius:9px}.xq-square{padding:0}.xq-piece{width:90%;height:90%;box-shadow:0 2px 0 #b9864d,1px 4px 4px #83572630}.xq-square.selected .xq-piece{outline-width:2px;transform:translateY(-2px)}.xq-square.last:before{border-width:1px;border-radius:7px}.xq-square.legal.has-piece:after{border-width:2px}.xq-square.legal:after{box-shadow:0 0 0 2px #ecf2d281}.tic-board{gap:9px;padding:12px;margin:12px auto 17px;border-radius:17px}.tic-cell{font-size:70px;border-radius:10px}.mine-tools{gap:7px}.mine-stats{font-size:10px;gap:10px}.mode-group button{font-size:10px;padding:0 9px}.mine-board{gap:3px;padding:7px;border-radius:9px}.mine-board.medium{gap:2px;padding:5px}.mine-cell{border-radius:3px;font-size:17px}.mine-board.medium .mine-cell{font-size:13px}.status-box{font-size:12px;padding:12px}.footer{font-size:9px;margin-top:20px}.service-notice{font-size:11px;padding:11px}.result-banner strong{font-size:19px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}