*{margin:0;padding:0;box-sizing:border-box}
:root{
  --red:#DC2626;--red-bg:#FEF2F2;--red-border:#FECACA;
  --blue:#2563EB;--blue-bg:#EFF6FF;--blue-border:#BFDBFE;
  --atk:#EA580C;--def:#16A34A;--draw:#9333EA;
  --bg:#F8FAFC;--surface:#FFFFFF;--text:#0F172A;--text2:#64748B;
  --border:#E2E8F0;--shadow:0 1px 3px rgba(0,0,0,.08);
  --radius:14px;
}
html{-webkit-tap-highlight-color:transparent}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;overflow-x:hidden}

/* ── 屏幕 ── */
.screen{display:none;min-height:100dvh;flex-direction:column;padding:20px;max-width:480px;margin:0 auto}
.screen.active{display:flex;animation:screenIn .25s ease}
@keyframes screenIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ── 顶栏 ── */
.top-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.top-title{font-size:16px;font-weight:700}
.btn-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--border);border-radius:10px;font-size:18px;cursor:pointer;color:var(--text)}
.btn-icon:active{background:var(--border)}

/* ── 阵营徽章 ── */
.side-badge{font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;letter-spacing:.5px}
.side-badge.red{background:var(--red-bg);color:var(--red);border:1px solid var(--red-border)}
.side-badge.blue{background:var(--blue-bg);color:var(--blue);border:1px solid var(--blue-border)}

/* ── 步骤指示 ── */
.step-dots{display:flex;gap:6px;justify-content:center;margin-bottom:16px}
.step-dot{width:40px;height:4px;border-radius:2px;background:var(--border);transition:all .3s}
.step-dot.active{background:var(--text)}
.step-dot.done{background:var(--def)}

/* ═══════════ 主页 ═══════════ */
.home-hero{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:90dvh;text-align:center}
.home-icon{font-size:80px;margin-bottom:20px;filter:drop-shadow(0 4px 12px rgba(0,0,0,.15))}
.home-hero h1{font-size:30px;font-weight:800;margin-bottom:8px;letter-spacing:-.5px}
.home-hero p{color:var(--text2);font-size:16px;margin-bottom:48px}

/* ── 通用按钮 ── */
.btn-hero{width:100%;max-width:320px;padding:14px 16px;font-size:16px;font-weight:700;color:#fff;background:linear-gradient(135deg,#1E293B,#334155);border:none;border-radius:var(--radius);cursor:pointer;box-shadow:0 4px 12px rgba(30,41,59,.3);transition:transform .1s}
.btn-hero:active{transform:scale(.97)}
.btn-secondary{display:block;width:100%;max-width:320px;margin-left:auto;margin-right:auto;padding:12px 14px;font-size:14px;font-weight:600;color:var(--text2);background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:center}
.result-bottom .btn-hero,.result-bottom .btn-secondary{flex:1}
.gameover-body .btn-hero,.gameover-body .btn-secondary{max-width:320px}
.btn-secondary:active{background:var(--border)}

/* ═══════════ 记分牌 ═══════════ */
.scoreboard{display:flex;align-items:stretch;gap:12px;margin:8px 0 20px}
.score-card{flex:1;text-align:center;padding:20px 12px;border-radius:var(--radius);border:2px solid transparent;transition:all .3s}
.score-red{background:var(--red-bg);border-color:var(--red-border)}
.score-blue{background:var(--blue-bg);border-color:var(--blue-border)}
.score-label{font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:4px}
.score-red .score-label{color:var(--red)}
.score-blue .score-label{color:var(--blue)}
.score-num{font-size:42px;font-weight:800;line-height:1}
.score-red .score-num{color:var(--red)}
.score-blue .score-num{color:var(--blue)}
.score-divider{display:flex;align-items:center;font-size:14px;font-weight:800;color:var(--text2)}

/* ── 攻击按钮 ── */
.attack-row{display:flex;gap:12px;margin-bottom:12px}
.btn-side{flex:1;padding:18px 12px;font-size:17px;font-weight:700;color:#fff;border:none;border-radius:var(--radius);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:transform .1s;position:relative;overflow:hidden}
.btn-side:active{transform:scale(.96)}
.btn-red{background:linear-gradient(135deg,#DC2626,#B91C1C);box-shadow:0 4px 16px rgba(220,38,38,.3)}
.btn-blue{background:linear-gradient(135deg,#2563EB,#1D4ED8);box-shadow:0 4px 16px rgba(37,99,235,.3)}
.btn-side-icon{font-size:18px}

/* ── 功能按钮 ── */
.util-row{display:flex;gap:8px;margin-bottom:16px}
.btn-util{flex:1;padding:10px;font-size:13px;font-weight:600;color:var(--text2);background:var(--surface);border:1px solid var(--border);border-radius:10px;cursor:pointer;text-align:center}
.btn-util:active{background:var(--border)}

/* ── 小标题 ── */
.section-head{font-size:13px;font-weight:700;color:var(--text2);letter-spacing:.5px;margin-bottom:8px;text-transform:uppercase}

/* ═══════════ 棋子网格 ═══════════ */
.piece-grid{flex:1;display:grid;grid-template-columns:repeat(3,1fr);gap:10px;align-content:start}

/* 棋子按钮基础 */
.piece-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:16px 8px 12px;font-size:22px;font-weight:800;
  border-radius:var(--radius);cursor:pointer;user-select:none;
  position:relative;transition:all .15s;border:2px solid transparent;
  background:var(--surface);
  box-shadow:var(--shadow);
}
.piece-btn:active:not(.exhausted){transform:scale(.94)}
.piece-btn .piece-remain{font-size:11px;font-weight:600;margin-top:3px;color:var(--text2)}

/* 红方棋子 */
.piece-btn.red-piece{background:var(--red-bg);border-color:var(--red-border);color:var(--red)}
.piece-btn.red-piece:active:not(.exhausted){background:var(--red-border)}

/* 蓝方棋子 */
.piece-btn.blue-piece{background:var(--blue-bg);border-color:var(--blue-border);color:var(--blue)}
.piece-btn.blue-piece:active:not(.exhausted){background:var(--blue-border)}

/* 不可用 */
.piece-btn.exhausted{opacity:.25;pointer-events:none;box-shadow:none}

/* ═══════════ 遮罩 ═══════════ */
.mask-body{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:85dvh;text-align:center}
.mask-icon{font-size:64px;margin-bottom:16px}
.mask-body .side-badge{margin-bottom:8px}
.mask-body h2{font-size:22px;margin-bottom:8px}
.mask-hint{color:var(--text2);font-size:15px}

/* ═══════════ 结果 ═══════════ */
.result-center{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center}
.result-icon{font-size:56px;margin-bottom:16px}
.result-banner{text-align:center;padding:28px 24px;border-radius:var(--radius);width:100%;max-width:360px;animation:popIn .35s ease}
@keyframes popIn{0%{opacity:0;transform:scale(.9)}60%{transform:scale(1.02)}100%{opacity:1;transform:scale(1)}}
.result-banner.side-win-red{background:linear-gradient(135deg,rgba(220,38,38,.08),rgba(220,38,38,.15));border:2px solid var(--red);color:var(--red)}
.result-banner.side-win-blue{background:linear-gradient(135deg,rgba(37,99,235,.08),rgba(37,99,235,.15));border:2px solid var(--blue);color:var(--blue)}
.result-banner.both-die{background:linear-gradient(135deg,rgba(147,51,234,.08),rgba(147,51,234,.15));border:2px solid var(--draw);color:var(--draw)}
.result-banner .r-title{font-size:26px;font-weight:800;margin-bottom:6px}
.result-banner .r-desc{font-size:15px;opacity:.8}
.result-warning{margin-top:14px;padding:10px 16px;background:var(--red-bg);border:1px solid var(--red-border);border-radius:10px;color:var(--red);font-size:13px;text-align:center;max-width:360px;font-weight:600}
.result-bottom{display:flex;gap:12px;padding-top:16px;width:100%;max-width:360px;margin:0 auto}

/* ═══════════ 历史 ═══════════ */
.history-list{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}
.history-empty{text-align:center;color:var(--text2);padding:32px;font-size:14px}
.history-item{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--surface);border-radius:10px;margin-bottom:6px;border:1px solid var(--border);font-size:13px}
.h-round{color:var(--text2);font-weight:600;font-size:12px;min-width:28px}
.h-side{font-size:12px;font-weight:700;padding:2px 7px;border-radius:4px}
.h-side.red{background:var(--red-bg);color:var(--red)}
.h-side.blue{background:var(--blue-bg);color:var(--blue)}
.h-result{font-weight:700;flex:1}
.h-result.win{color:var(--atk)}
.h-result.lose{color:var(--def)}
.h-result.draw{color:var(--draw)}

/* ═══════════ 游戏结束 ═══════════ */
.gameover-body{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:85dvh;text-align:center}
.go-icon{font-size:72px;margin-bottom:12px}
.gameover-body h2{font-size:24px;font-weight:800;margin-bottom:6px}
.gameover-body>p{color:var(--text2);margin-bottom:24px;font-size:15px}
.go-scoreboard{display:flex;gap:12px;width:100%;max-width:320px;margin-bottom:28px}
.go-score{flex:1;padding:16px;border-radius:var(--radius);text-align:center}
.go-red{background:var(--red-bg);border:2px solid var(--red-border)}
.go-blue{background:var(--blue-bg);border:2px solid var(--blue-border)}
.go-label{font-size:13px;font-weight:700;margin-bottom:4px}
.go-red .go-label{color:var(--red)}
.go-blue .go-label{color:var(--blue)}
.go-num{font-size:36px;font-weight:800}
.go-red .go-num{color:var(--red)}
.go-blue .go-num{color:var(--blue)}

/* ═══════════ 详细记录 ═══════════ */
.detail-summary{display:flex;gap:12px;margin-bottom:12px}
.detail-list{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}
.detail-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:8px}
.di-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.di-round{font-size:12px;color:var(--text2);font-weight:600}
.di-result{font-weight:800;font-size:14px}
.di-result.win{color:var(--atk)}
.di-result.lose{color:var(--def)}
.di-result.draw{color:var(--draw)}
.di-pieces{display:flex;justify-content:space-between;gap:8px}
.di-piece{flex:1;padding:8px 10px;border-radius:8px;font-size:14px;font-weight:700;text-align:center}
.di-piece.red-p{background:var(--red-bg);color:var(--red)}
.di-piece.blue-p{background:var(--blue-bg);color:var(--blue)}
.di-piece.struck{text-decoration:line-through;opacity:.4}

/* ═══════════ 自定义确认弹窗 ═══════════ */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:1000;align-items:center;justify-content:center;padding:20px}
.modal-overlay.show{display:flex;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-box{background:var(--surface);border-radius:var(--radius);padding:28px 24px 20px;width:100%;max-width:320px;box-shadow:0 20px 60px rgba(0,0,0,.2);animation:modalPop .25s ease}
@keyframes modalPop{from{opacity:0;transform:scale(.9) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}
.modal-title{font-size:17px;font-weight:700;text-align:center;margin-bottom:8px}
.modal-desc{font-size:14px;color:var(--text2);text-align:center;margin-bottom:24px;line-height:1.5}
.modal-actions{display:flex;gap:10px}
.modal-actions .btn-cancel,.modal-actions .btn-confirm{flex:1;padding:12px;font-size:14px;font-weight:700;border-radius:10px;cursor:pointer;border:none;transition:transform .1s}
.modal-actions .btn-cancel{background:var(--surface);border:1.5px solid var(--border);color:var(--text2)}
.modal-actions .btn-cancel:active{background:var(--border)}
.modal-actions .btn-confirm{background:linear-gradient(135deg,#1E293B,#334155);color:#fff;box-shadow:0 2px 8px rgba(30,41,59,.25)}
.modal-actions .btn-confirm:active{transform:scale(.97)}