/* 亲子棋苑 © 十方星辰(深圳)科技有限公司 */
:root{--bg: #0d0f14;--bg2: #1c222d;--text: #e9ecf2;--dim: #8b93a3;--accent: #e8b64c;--accent-soft: rgba(232, 182, 76, .16);--gold-grad: linear-gradient(180deg, #f5c962, #dca73a);--gold-grad-soft: linear-gradient(180deg, #e7c066, #c6953a);--gold-grad-135: linear-gradient(135deg, #f5c962, #dca73a);--gold-line: rgba(232, 182, 76, .35);--gold-line-strong: rgba(247, 205, 110, .7);--gold-edge: rgba(232, 182, 76, .45);--gold-text: #f2c560;--gold-soft-grad: linear-gradient(135deg, rgba(232, 182, 76, .24), rgba(232, 182, 76, .07));--gold-wash: radial-gradient(130% 200% at 50% -80%, rgba(232, 182, 76, .28), transparent 62%), linear-gradient(135deg, rgba(232, 182, 76, .15), rgba(232, 182, 76, .03) 65%);--gold-shimmer: linear-gradient(90deg, #f9e3a6, #e0a93e, #f9e3a6);--gold-badge-bg: linear-gradient(180deg, rgba(245, 201, 98, .28), rgba(220, 167, 58, .16));--gold-badge-line: rgba(245, 201, 98, .45);--panel: rgba(255, 255, 255, .055);--card-bg: rgba(255, 255, 255, .05);--card-hover: rgba(255, 255, 255, .07);--border: rgba(255, 255, 255, .1);--danger: #e0655a;--shadow: 0 10px 32px rgba(0, 0, 0, .3);--shadow-hover: 0 18px 44px rgba(0, 0, 0, .45);--qi-tint: rgba(12, 15, 20, .6);--board-w: 1000px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;--overlay: radial-gradient(ellipse 130% 95% at 50% 42%, rgba(13, 15, 19, .32) 0%, rgba(13, 15, 19, .52) 72%, rgba(13, 15, 19, .62) 100%);--board-pattern: 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#f0e6c8;--bg2: #fbf5e2;--text: #33302a;--dim: #948b7a;--accent: #a97c1d;--accent-soft: rgba(169, 124, 29, .14);--panel: rgba(0, 0, 0, .045);--card-bg: rgba(0, 0, 0, .045);--card-hover: rgba(0, 0, 0, .07);--border: rgba(0, 0, 0, .1);--danger: #c24f43;--shadow: 0 10px 32px rgba(120, 96, 48, .18);--shadow-hover: 0 18px 44px rgba(120, 96, 48, .3);--qi-tint: rgba(251, 245, 226, .6);--overlay: radial-gradient(ellipse 130% 95% at 50% 42%, rgba(250, 246, 236, .38) 0%, rgba(244, 238, 224, .56) 72%, rgba(236, 228, 208, .66) 100%);--board-pattern: 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560px at 50% -10%,var(--bg2),transparent 62%),var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.75;padding:56px 20px 48px;transition:background .3s ease,color .3s ease}.bg-board{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;-webkit-mask-image:linear-gradient(to bottom,#000 92%,transparent 100%);mask-image:linear-gradient(to bottom,#000 92%,transparent 100%)}.bg-board:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:max(100%,var(--board-w, 1000px));transform:translate(-50%);background-image:var(--board-pattern);background-size:200px 200px;background-position:0 0}.page{max-width:560px;margin:0 auto;position:relative;z-index:1}.page-wide{max-width:760px}.brand{text-align:center;animation:rise .7s cubic-bezier(.2,.9,.3,1) both}.brand .qi{width:58px;height:58px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;font-size:26px;background:radial-gradient(circle at 34% 30%,var(--accent-soft),transparent 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option{background:var(--bg);color:var(--text)}textarea{min-height:130px;resize:vertical;line-height:1.7}.count{text-align:right;font-size:12px;color:var(--dim);margin-top:4px}.btn-submit{width:100%;margin-top:6px;padding:13px 0;border-radius:999px;cursor:pointer;border:1px solid var(--accent-soft);background:var(--accent-soft);color:var(--accent);font-size:15px;letter-spacing:6px;font-weight:600;transition:transform .15s,filter .2s}.btn-submit:hover{transform:translateY(-1px);filter:brightness(1.08)}.btn-submit:active{transform:scale(.98)}.btn-submit:disabled{opacity:.5;cursor:not-allowed;transform:none}.status{display:none;margin-top:16px;padding:12px 16px;border-radius:14px;font-size:14px;line-height:1.6;text-align:center}.status.ok{display:block;background:#4caf501a;border:1px solid rgba(76,175,80,.35)}.status.err{display:block;background:#e0655a1a;border:1px solid rgba(224,101,90,.35)}.status a{color:var(--accent)}.doc{margin-top:30px}.doc section{margin-bottom:26px}.doc h2{font-size:17px;margin-bottom:8px;color:var(--accent);letter-spacing:1px}.doc p,.doc li{font-size:14px;color:var(--text);opacity:.92}.doc ul{padding-left:22px;margin-top:4px}.doc li{margin:4px 0}.doc a{color:var(--accent);text-decoration:none}.doc a:hover{text-decoration:underline}.page-footer{margin-top:34px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:11px;letter-spacing:2px;color:var(--dim);opacity:.65;animation:rise .7s .16s cubic-bezier(.2,.9,.3,1) both}.page-footer a{color:var(--dim);text-decoration:none}.back-row{margin-top:16px;text-align:center}.btn-back{display:inline-flex;align-items:center;gap:8px;padding:11px 30px;border-radius:999px;border:1px solid var(--accent-soft);background:var(--accent-soft);color:var(--accent);font-size:14px;letter-spacing:2px;font-weight:600;text-decoration:none;cursor:pointer;transition:transform .15s,filter 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