*{box-sizing:border-box;margin:0;padding:0}:root{--bg-color:#f2f2f7;--card-bg:#ffffffd9;--text:#1c1c1e;--text-secondary:#8e8e93;--accent:#007aff;--success:#34c759;--border-color:#3c3c431a;--radius:14px;--safe-bottom:env(safe-area-inset-bottom,0px)}body{background-color:var(--bg-color);color:var(--text);-webkit-tap-highlight-color:transparent;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow-x:hidden}.navbar{-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);z-index:100;background:#f2f2f7d9;align-items:center;height:52px;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0}.nav-title{text-align:center;white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:16px;font-weight:600;overflow:hidden}.nav-spacer{width:60px}.debug-version{color:#fff;font-variant-numeric:tabular-nums;white-space:nowrap;text-overflow:ellipsis;pointer-events:none;z-index:500;background:#1c1c1eb8;border-radius:6px;max-width:calc(100vw - 16px);padding:3px 6px;font-size:10px;line-height:1.2;position:fixed;top:58px;right:8px;overflow:hidden}.main{max-width:600px;margin:0 auto;padding:68px 16px 195px}.book-header{text-align:center;margin-bottom:24px}.book-emoji{margin-bottom:8px;font-size:48px}.book-title-en{margin-bottom:4px;font-size:22px;font-weight:700;line-height:1.3}.book-title-cn{color:var(--text-secondary);margin-bottom:4px;font-size:15px}.book-meta{color:var(--text-secondary);font-size:12px}.resume-card{background-color:var(--accent);color:#fff;cursor:pointer;border-radius:12px;margin-bottom:20px;padding:16px;transition:transform .15s;display:none}.resume-card:active{transform:scale(.98)}.resume-card.show{display:block}.resume-label{opacity:.8;letter-spacing:.5px;margin-bottom:6px;font-size:12px}.resume-title{margin-bottom:4px;font-size:15px;font-weight:600}.resume-progress{opacity:.9;font-size:12px}.entitlement-card{background:#fff;border:1px solid #007aff29;border-radius:12px;margin:0 0 18px;padding:14px;box-shadow:0 2px 10px 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strong{color:var(--text);font-size:13px}.shop-mini-button{color:#1f7a3b;background:#34c75914;border:1px solid #34c7593d;border-radius:8px;flex-shrink:0;height:32px;padding:0 10px;font-weight:700}.entitlement-overlay{z-index:250;background:#00000047;display:none;position:fixed;inset:52px 0 0}.entitlement-overlay.show{display:block}.entitlement-sheet{z-index:260;max-height:min(74vh,620px);padding:10px 16px calc(18px + var(--safe-bottom));background:#fff;border-radius:16px 16px 0 0;transition:transform .24s;position:fixed;bottom:0;left:0;right:0;overflow-y:auto;transform:translateY(105%);box-shadow:0 -10px 30px #00000029}.entitlement-sheet.show{transform:translateY(0)}.sheet-handle{background:#00000029;border-radius:3px;width:38px;height:4px;margin:0 auto 12px}.sheet-title{align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.sheet-title h2{margin-bottom:4px;font-size:18px;line-height:1.25}.sheet-title p{color:var(--text-secondary);font-size:12px;line-height:1.45}.sheet-close{width:34px;height:34px;color:var(--text-secondary);background:#0000000f;border:0;border-radius:17px;flex-shrink:0;font-size:24px;line-height:1}.resource-block{border:1px solid var(--border-color);border-radius:12px;margin-bottom:12px;padding:14px}.resource-block.video{border-color:#007aff2e}.resource-block.shop{border-color:#34c75938}.resource-top{align-items:flex-start;gap:10px;margin-bottom:12px;display:flex}.resource-name{font-size:15px;font-weight:700;line-height:1.3}.resource-desc{color:var(--text-secondary);margin-top:4px;font-size:12px;line-height:1.45}.primary-action,.secondary-action{cursor:pointer;border-radius:10px;width:100%;min-height:44px;font-size:14px;font-weight:700}.primary-action{background:var(--accent);color:#fff;border:0}.primary-action.shop-action{background:var(--success)}.actions{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:8px;display:grid}.secondary-action{border:1px solid var(--border-color);color:var(--text);background:#fff}.actions .secondary-action:only-child{grid-column:1/-1}.wechat-notice{color:#6b4a00;background:#fff7e6;border-radius:8px;margin-top:10px;padding:9px 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var(--border-color);border-top-color:var(--accent);border-radius:50%;width:32px;height:32px;margin:0 auto 16px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.subtitle-panel{background-color:var(--card-bg);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border-color);z-index:99;border-radius:16px 16px 0 0;max-height:50vh;padding:16px 20px;display:none;position:fixed;bottom:112px;left:0;right:0;overflow-y:auto;box-shadow:0 -4px 12px #0000000d}.subtitle-panel.show{display:block}.subtitle-handle{cursor:pointer;width:100%;color:inherit;-webkit-tap-highlight-color:transparent;z-index:1;background:var(--card-bg);-webkit-backdrop-filter:blur(20px);border:0;flex-direction:column;align-items:center;padding:6px 0 10px;display:flex;position:sticky;top:0}.subtitle-handle-bar{background:#00000026;border-radius:2px;width:36px;height:4px;margin-bottom:4px}.subtitle-handle-text{color:var(--text-secondary);opacity:.5;font-size:11px}.subtitle-mini{-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border-color);z-index:98;cursor:pointer;height:40px;color:inherit;-webkit-tap-highlight-color:transparent;background:#ffffffeb;border-bottom:0;border-left:0;border-right:0;justify-content:center;align-items:center;display:none;position:fixed;bottom:112px;left:0;right:0}.subtitle-mini.show{display:flex}.subtitle-mini .mini-track{position:absolute;inset:0 62px 0 16px;overflow:hidden}.subtitle-mini .mini-words{white-space:nowrap;will-change:transform;align-items:center;height:100%;transition:transform .35s;display:flex}.subtitle-mini .mw{color:var(--text-secondary);padding:0 3px;font-size:15px;transition:color .3s,font-weight .3s,font-size .3s;display:inline-block}.subtitle-mini 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