:root{--bg: #f6f1e5;--card: #fcf9f0;--text: #2b2620;--muted: #85796a;--accent: #a63c2c;--accent-deep: #8a3123;--accent-soft: #f3e4dc;--gold: #a98a4f;--border: #e3d9c6;--good: #3f6b39;--good-soft: #e6eedd;--wash: rgb(255 255 255 / .55);--shadow: 0 1px 3px rgb(56 44 30 / .06), 0 4px 14px rgb(56 44 30 / .05);--radius: 14px;--tabbar-h: 56px;--font-zh: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;--font-song: "Songti SC", "STSong", "Noto Serif SC", "Noto Serif CJK SC", "SimSun", serif;--font-kai: "Kaiti SC", "STKaiti", "KaiTi", "DFKai-SB", var(--font-song)}:root[data-theme=dark]{--bg: #15120e;--card: #1e1a14;--text: #eae3d6;--muted: #a2968a;--accent: #cd6a52;--accent-deep: #b4523c;--accent-soft: #3a241d;--gold: #c2a262;--border: #37302a;--good: #92bd85;--good-soft: #24301f;--wash: rgb(255 255 255 / .03);--shadow: 0 1px 3px rgb(0 0 0 / .3), 0 4px 14px rgb(0 0 0 / .2)}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: 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var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 24px 28px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;min-height:320px;justify-content:center}.review-chars{font-family:var(--font-kai);font-size:clamp(2.8rem,14vw,3.9rem);font-weight:400;letter-spacing:.14em;color:var(--text);line-height:1.3}.review-chars-small{font-size:2.1rem}.review-hint{color:var(--muted);font-size:.95rem;margin-bottom:10px}.new-seal{display:inline-block;font-family:var(--font-kai);font-size:.75rem;color:#fff;background:var(--accent);border-radius:3px;padding:1px 6px;margin-right:8px;vertical-align:1px}.review-pinyin{color:var(--muted);letter-spacing:.04em;margin-top:-8px}.review-answer .zh{font-size:1.02rem}.review-answer 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env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--card);border-top:1px solid var(--border);display:flex;z-index:10}.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:.7rem;color:var(--muted)}.tabbar a.active{color:var(--accent);font-weight:600}.tab-zi{width:27px;height:27px;display:flex;align-items:center;justify-content:center;font-family:var(--font-kai);font-size:1.05rem;line-height:1;border-radius:6px;color:var(--text)}.tabbar a.active .tab-zi{background:var(--accent);color:#fff;font-weight:400}.goals-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px 6px;margin-bottom:16px}.goals-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:8px;border-bottom:1px solid 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var(--accent);border-radius:7px;background:var(--accent-soft);transform:rotate(-6deg)}.goal-body{display:flex;flex-direction:column;flex:1;min-width:0}.goal-title{font-weight:600}.goal-done .goal-title{color:var(--muted);font-weight:400;text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--accent) 45%,transparent);text-decoration-thickness:1.5px}.goal-sub{color:var(--muted);font-size:.82rem}.quiz-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 18px}.quiz-prompt{font-family:var(--font-song);font-size:1.08rem;font-weight:600;margin-bottom:12px}.quiz-display{font-size:1rem;line-height:1.9;padding:10px 14px;border-left:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 4%,transparent);border-radius:0 8px 8px 0;margin-bottom:14px}.quiz-display-chars{font-family:var(--font-kai);font-size:2rem;letter-spacing:.18em;text-align:center;border-left:none;background:none;padding:6px 0 10px}.quiz-options{display:flex;flex-direction:column;gap:10px}.quiz-opt{width:100%;min-height:52px;padding:12px 16px;font-family:inherit;font-size:.98rem;text-align:left;color:var(--text);background:transparent;border:1px solid var(--border);border-radius:10px;cursor:pointer}.quiz-opt:active{transform:scale(.99);border-color:var(--accent)}.quiz-opt-zi{font-family:var(--font-kai);font-size:1.5rem;text-align:center}.quiz-opt.opt-correct{border-color:var(--good);background:var(--good-soft);color:var(--good);font-weight:600}.quiz-opt.opt-wrong{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.quiz-opt.opt-dim{opacity:.45}.quiz-opt:disabled{cursor:default}.quiz-after{margin-top:16px;display:flex;flex-direction:column;gap:10px}.quiz-note{font-size:.92rem;color:var(--muted);line-height:1.7}.quiz-after .btn{width:100%}.quiz-entry-link{padding:0;text-align:left}.stamp-hint{color:var(--muted);font-size:.85rem;margin:-6px 4px 16px}.stamp-section{margin-bottom:22px}.stamp-head{display:flex;align-items:baseline;gap:10px;margin:0 2px 10px}.stamp-head h2{font-family:var(--font-song);font-size:1.05rem;font-weight:700;letter-spacing:.05em}.stamp-count{color:var(--muted);font-size:.82rem}.stamp-full{font-family:var(--font-kai);font-size:.78rem;color:var(--accent);border:1.5px solid var(--accent);border-radius:5px;padding:1px 6px;transform:rotate(-4deg)}.stamp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:10px}.stamp{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border:1.5px dashed var(--border);border-radius:10px;color:var(--muted);text-decoration:none;opacity:.75;padding:6px}.stamp:active{transform:scale(.96)}.stamp-got{opacity:1;color:var(--accent);border:2px solid var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 18%,transparent)}.stamp-quad{display:grid;grid-template-columns:repeat(2,auto);justify-items:center;column-gap:4px;font-family:var(--font-kai);font-size:1.28rem;line-height:1.25}.stamp-quad i{font-style:normal}.stamp-wide{grid-column:span 2;aspect-ratio:auto;min-height:76px}.stamp-line{font-family:var(--font-kai);font-size:.98rem;line-height:1.5;text-align:center}.milestone-row{display:flex;gap:10px;margin-bottom:14px}.mile-seal{flex:1;display:flex;align-items:center;justify-content:center;gap:4px;padding:8px 6px;font-family:var(--font-kai);font-size:.92rem;color:var(--muted);border:1.5px dashed var(--border);border-radius:9px;opacity:.8}.mile-seal i{font-style:normal;font-size:.78rem}.mile-seal.mile-got{color:var(--accent);border:2px solid var(--accent);background:var(--accent-soft);opacity:1;transform:rotate(-2deg)}.milestone-row+.tile{margin-bottom:16px}