:root{--bg:#f5f6fa;--panel:#fff;--text:#1c2333;--muted:#7a8199;--primary:#4f6ef7;--primary-soft:#e8edff;--good:#2fb37a;--good-soft:#e2f7ee;--hard:#e6a23c;--hard-soft:#fdf3e3;--again:#e05260;--again-soft:#fdeaec;--line:#e8eaf2;--radius:16px}@media (prefers-color-scheme:dark){:root{--bg:#10131c;--panel:#1a1f2e;--text:#e8eaf2;--muted:#8b93ab;--primary:#6d87ff;--primary-soft:#232c47;--good-soft:#17322a;--hard-soft:#332a1a;--again-soft:#33191d;--line:#262c3d}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Segoe UI,Microsoft YaHei,sans-serif}.app{flex-direction:column;max-width:520px;height:100%;margin:0 auto;display:flex}.content{padding:16px 16px calc(16px + 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var(--line);cursor:pointer;-webkit-user-select:none;user-select:none;flex-direction:column;justify-content:center;min-height:300px;padding:28px 22px;display:flex}.word{text-align:center;letter-spacing:.5px;word-break:break-word;font-size:40px;font-weight:700}.word-small{margin-bottom:12px;font-size:26px}.phonetic{color:var(--muted);justify-content:center;align-items:center;gap:8px;margin-top:10px;font-size:16px;display:flex}.tier-badge{color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:2px 8px;font-size:11px}.icon-btn{background:var(--primary-soft);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:34px;height:34px;font-size:15px;display:flex}.flip-hint{text-align:center;color:var(--muted);margin-top:26px;font-size:12px}.senses{margin:0 0 14px;padding:0;font-size:17px;line-height:1.65;list-style:none}.senses .pos{color:var(--primary);margin-right:6px;font-size:14px;font-style:normal}.sentence{border-top:1px solid 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