/* 棋事：把棋盘、目标和阅读节奏放在优先位置。 */
:root { --paper: #f4eee2; --ink: #343c36; --muted: #7a8075; --jade: #315c4a; --gold: #b48b50; --line: #ddd5c6; }
body { background: radial-gradient(ellipse at top, #fbf8f1, #e9e4d8); color: var(--ink); padding: 24px; }
button, select, input { font: inherit; }
button:focus-visible, summary:focus-visible, .chess-cell:focus-visible { outline: 3px solid #397c65; outline-offset: 3px; }
.game-container { max-width: 1180px; }
.game-header { background: none; border: none; padding: 12px 0 24px; margin-bottom: 12px; position: relative; }
.brand-mark { display: inline-block; color: var(--jade); letter-spacing: .4em; font-size: 13px; margin-bottom: 12px; }
.game-header h1 { font-family: 'STKaiti', 'KaiTi', serif; color: var(--ink); text-shadow: none; font-size: clamp(26px, 3vw, 38px); letter-spacing: .13em; }
.subtitle { color: var(--muted); font-size: 14px; font-style: normal; margin-top: 10px; }
.focus-control { position: absolute; right: 0; top: 12px; font-size: 13px; color: var(--jade); display: flex; gap: 8px; align-items: center; }
input[type=checkbox] { accent-color: var(--jade); }
.main-game { display: grid; grid-template-columns: 248px minmax(0, 1fr); gap: 24px; }
.info-panel, .analysis-panel { width: 100%; padding: 20px; background: #faf7f0; border: 1px solid var(--line); border-radius: 16px; }
.info-panel h3, .analysis-panel h3, .analysis-section h4 { color: var(--jade); font-size: 15px; border-color: var(--line); }
.player-info p, .battle-status p { font-size: 13px; line-height: 1.8; }
.turn-red { color: #a84436; } .turn-black { color: #343c36; }
.btn { border-radius: 8px; padding: 11px 14px; font-size: 13px; transition: background .15s; }
.btn-primary { background: var(--jade); color: #fff; }
.btn-primary:hover { background: #254b3a; transform: none; box-shadow: none; }
.btn-secondary { background: #eae5d9; color: var(--ink); }
.btn-secondary:hover { background: #ddd7c7; }
.difficulty-control label, .difficulty-control span { color: var(--ink) !important; font-size: 13px; }
.difficulty-control select { background: #fffdf7; border-color: var(--line); color: var(--ink); font-size: 13px; }
.advanced-controls { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 14px; }
.advanced-controls summary { color: var(--jade); cursor: pointer; font-size: 12px; line-height: 1.8; }
.advanced-controls > .difficulty-control { border-color: var(--line) !important; }
.log-content { background: #f0ecdf; font-size: 11px; color: #62685c; max-height: 160px; }
.board-container { min-width: 0; width: 100%; }
.chess-board { width: min(100%, 580px); aspect-ratio: 9 / 10; display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); grid-template-rows: repeat(10, minmax(0, 1fr)); padding: 0; border: 10px solid #aa8b60; border-radius: 6px; background: #edd8af url('assets/board-grid.svg') center / 100% 100% no-repeat; box-shadow: 0 12px 30px #5b4c3520; }
.chess-cell { width: 100%; height: 100%; min-width: 0; border: none; background: transparent; border-radius: 4px; }
.chess-cell:hover { background: #ffffff35; }
.chess-cell.last-move { background: #315c4a18; }
.chess-cell.selected { background: #d2b86266; box-shadow: inset 0 0 0 2px #ae8b3e; }
.chess-cell.valid-move { background: #315c4a13; }
.chess-cell.valid-move::after { width: 12px; height: 12px; background: #315c4a70; pointer-events: none; }
.chess-cell.valid-move:has(.chess-piece)::after { width: 85%; height: 85%; background: none; border: 2px dashed var(--jade); }
.chess-piece { width: 83%; height: 83%; font-family: 'STKaiti', 'KaiTi', serif; font-size: clamp(18px, 2.8vw, 29px); border: 2px solid; box-shadow: 0 3px 4px #61462d38; }
.chess-piece.red { background: radial-gradient(circle at 35% 30%, #fff8e5, #e6cc97); color: #a23729; border-color: #a23729; text-shadow: none; }
.chess-piece.black { background: radial-gradient(circle at 35% 30%, #fff8e5, #e6cc97); color: #2f3931; border-color: #2f3931; text-shadow: none; }
.game-message { color: var(--jade); background: #f9f6ed; padding: 13px; width: min(100%, 580px); font-size: 13px; border-radius: 8px; border: 1px solid var(--line); margin-top: 16px; text-align: center; }
.analysis-panel { grid-column: 1 / -1; max-height: none; }
.modal { background: #23372ccc; backdrop-filter: blur(8px); padding: 18px; overflow-y: auto; }
.modal-content { background: var(--paper); color: var(--ink); border: 1px solid #d7ccba; border-radius: 20px; max-width: 860px; padding: 34px; box-shadow: 0 24px 80px #0003; max-height: 90vh; overflow-y: auto; }
.modal-content h2 { color: var(--ink); font-family: 'STKaiti', 'KaiTi', serif; font-size: 27px; margin: 8px 0 14px; }
.welcome-description { color: var(--muted); font-size: 14px; }
.mode-selection { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 26px; }
.mode-card { background: #faf7f0; color: var(--ink); padding: 25px 18px; border: 1px solid var(--line); border-radius: 12px; text-align: left; }
.mode-card:hover { background: #fffdf7; transform: translateY(-3px); border-color: var(--jade); box-shadow: 0 8px 20px #315c4a18; }
.mode-card h3 { color: var(--ink); font-size: 21px; margin: 8px 0 14px; font-family: 'STKaiti', 'KaiTi', serif; }
.mode-card p { font-size: 13px; min-height: 54px; }
.mode-card .mode-desc { color: var(--jade); background: transparent; padding: 0; font-size: 12px; }
.story-mode-card { background: #e9eee3; border-color: #8fa18a; }
.chapter-label { color: #8d794f; display: block; font-size: 11px; letter-spacing: .12em; line-height: 1.7; }
.campaign-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 22px 0; }
.campaign-card { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; padding: 24px; background: #faf7f0; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; text-align: left; color: var(--ink); }
.campaign-card:hover:not(:disabled) { border-color: var(--jade); background: #e9eee3; }
.campaign-card:disabled { opacity: .55; cursor: not-allowed; }
.chapter-title { font-family: 'STKaiti', 'KaiTi', serif; font-size: 23px; }
.chapter-skill { font-size: 13px; color: var(--muted); }
.chapter-state { font-size: 12px; color: var(--jade); margin-top: 10px; }
.campaign-note { color: var(--muted); font-size: 12px; line-height: 1.8; margin-top: 16px; }
.campaign-panel { width: min(100%, 580px); padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: #faf7f0; margin-bottom: 20px; }
.campaign-panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.campaign-panel h2 { font-family: 'STKaiti', 'KaiTi', serif; color: var(--jade); font-size: 25px; margin: 5px 0 10px; }
.campaign-panel p, .campaign-ending { font-size: 14px; line-height: 1.9; }
.chapter-directory { background: transparent; border: 1px solid var(--line); padding: 7px 10px; border-radius: 7px; color: var(--jade); cursor: pointer; font-size: 12px; white-space: nowrap; }
.chapter-objective { display: flex; flex-direction: column; gap: 6px; margin-top: 16px; padding: 12px; border-left: 3px solid var(--jade); background: #edf0e5; font-size: 13px; }
.chapter-objective > span { font-size: 11px; color: var(--muted); }
.campaign-panel small { display: block; margin-top: 12px; color: var(--muted); font-size: 10px; }
.campaign-hint { color: var(--jade); margin-top: 12px; }
.close-btn { color: var(--ink); background: none; }
.ending-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.ending-buttons .btn { width: auto; flex: 1; min-width: 100px; }
.hidden, [hidden] { display: none !important; }
.character-card, .endgame-card { background: #faf7f0; border-color: var(--line); color: var(--ink); }
.character-card h3, .endgame-card h4 { color: var(--jade); }
.character-card .bonus { color: var(--jade); background: #e9eee3; }
.endgame-card.unverified-endgame { opacity: .5; cursor: not-allowed; }
.endgame-card.unverified-endgame:hover { transform: none; box-shadow: none; border-color: var(--line); }
@media (max-width: 760px) {
    body { padding: 12px; }
    .game-header { padding-top: 30px; }
    .focus-control { top: 0; font-size: 11px; }
    .main-game { display: flex; flex-direction: column; gap: 16px; }
    .board-container { order: -1; }
    .info-panel, .analysis-panel { flex: auto; width: 100%; }
    .modal-content { padding: 22px; }
    .mode-selection, .campaign-list { grid-template-columns: 1fr; }
    .mode-card { padding: 18px; }
    .mode-card p { min-height: 0; }
    .modal { align-items: flex-start; }
    .chess-board { border-width: 6px; }
    .chess-piece { font-size: clamp(17px, 5.4vw, 27px); }
    .campaign-panel { padding: 16px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }