.dd-root{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;background:var(--color-bg, #f7f9fc);color:var(--color-text, #2d3436);overflow:hidden;z-index:100}.dd-root [hidden]{display:none!important}.dd-topbar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:8px 12px;background:var(--color-primary, #4ecdc4);color:#fff;box-shadow:0 2px 8px #0000001f;z-index:5}.dd-topbar-left{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;min-width:0}.dd-title{font-size:18px;font-weight:700}.dd-pageinfo{font-size:14px;opacity:.92}.dd-topbar-right{display:flex;gap:8px;flex-wrap:wrap}.dd-pill{border:0;border-radius:999px;padding:9px 14px;min-height:42px;font-size:15px;font-weight:600;color:#10565a;background:var(--color-accent, #ffe66d)}.dd-stage{flex:1 1 auto;display:flex;align-items:center;justify-content:center;gap:8px;padding:8px;min-height:0;min-width:0;overflow:hidden}.dd-arrow{flex:0 0 auto;width:54px;height:54px;border:0;border-radius:50%;font-size:32px;line-height:1;color:#10565a;background:#fff;box-shadow:0 2px 10px #00000029}.dd-arrow:disabled{opacity:.28}.dd-viewport{position:relative;flex:0 0 auto;line-height:0}.dd-pageimg{display:block;width:100%;height:100%;border-radius:8px;background:#fff;box-shadow:0 4px 18px #00000024}.dd-overlay{position:absolute;top:0;right:0;bottom:0;left:0}.dd-hotspot{position:absolute;border:2px dashed rgba(78,205,196,0);border-radius:8px;background:#4ecdc400;cursor:pointer;transition:background .12s,border-color .12s;-webkit-tap-highlight-color:transparent}.dd-hotspot:hover{background:#4ecdc438;border-color:#4ecdc4bf}.dd-hotspot-active{background:#ffe66d73!important;border-color:#f2a900!important;border-style:solid!important;animation:dd-pulse 1s ease-in-out infinite}@keyframes dd-pulse{0%,to{box-shadow:0 0 #f2a9008c}50%{box-shadow:0 0 0 10px #f2a90000}}.dd-loading{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--color-primary, #4ecdc4);background:#fffc;border-radius:8px}.dd-bottombar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:#fff;border-top:1px solid #e6ebf2}.dd-now{min-width:0;flex:1 1 auto}.dd-now-meta{font-size:14px;color:#7a8899;min-height:19px}.dd-now-text{font-size:21px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.dd-controls{display:flex;align-items:center;gap:12px}.dd-round{width:66px;height:66px;border:0;border-radius:50%;font-size:24px;color:#fff;background:var(--color-primary, #4ecdc4);box-shadow:0 3px 12px #4ecdc480}.dd-round-sm{width:52px;height:52px;font-size:18px;background:#a9b6c6;box-shadow:none}.dd-drawer{position:fixed;top:0;right:0;width:min(420px,88vw);height:100%;background:#fff;box-shadow:-6px 0 26px #0000002e;display:flex;flex-direction:column;z-index:120}.dd-drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;font-size:18px;font-weight:700;background:var(--color-primary, #4ecdc4);color:#fff}.dd-close{border:0;background:transparent;color:#fff;font-size:30px;line-height:1}.dd-drawer-body{flex:1 1 auto;overflow:auto;padding:10px 12px 24px;-webkit-overflow-scrolling:touch}.dd-row{display:block;width:100%;margin-bottom:8px;padding:12px 14px;border:1px solid #e6ebf2;border-radius:12px;background:var(--color-bg, #f7f9fc);font-size:18px;text-align:left;color:inherit}.dd-row-active{background:var(--color-accent, #ffe66d)!important;border-color:#f2a900!important}.dd-empty{font-size:16px;color:#7a8899}.dd-unit{margin-bottom:10px}.dd-unit-title{display:flex;align-items:center;gap:10px;width:100%;padding:12px 14px;border:1px solid #e6ebf2;border-radius:12px;background:var(--color-bg, #f7f9fc);font-size:17px;text-align:left;color:inherit}.dd-unit-num{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--color-primary, #4ecdc4);color:#fff;font-size:15px;font-weight:700}.dd-unit-name{flex:1 1 auto;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dd-unit-page{flex:0 0 auto;font-size:13px;color:#7a8899}.dd-pages{display:flex;flex-wrap:wrap;gap:6px;padding:8px 4px 0 44px}.dd-chip{min-width:42px;padding:7px 10px;border:1px solid #d8e0ea;border-radius:9px;background:#fff;font-size:15px;color:inherit}.dd-modal{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:20px;background:#141e2873;z-index:140}.dd-modal-box{width:min(520px,100%);max-height:86vh;overflow:auto;padding:22px;border-radius:16px;background:#fff}.dd-modal-box h2{margin:0 0 12px;font-size:21px}.dd-modal-box ul{margin:0 0 18px;padding-left:22px;line-height:1.9;font-size:17px}.dd-bigbtn{width:100%;min-height:58px;border:0;border-radius:12px;font-size:19px;font-weight:700;color:#10565a;background:var(--color-accent, #ffe66d)}.dd-list{padding:72px 16px 16px;max-width:640px;margin:0 auto}.dd-list h1{margin:0 0 4px;font-size:24px;text-align:center}.dd-list-sub{margin:0 0 20px;font-size:15px;color:#7a8899;text-align:center}.dd-grade{margin:20px 0 10px;font-size:18px;font-weight:700;color:#10565a}.dd-book{display:flex;align-items:center;gap:12px;width:100%;margin-bottom:12px;padding:14px 16px;border:none;border-radius:18px;background:#fff;box-shadow:0 4px 16px #00000014;text-align:left;color:inherit;font-size:18px}.dd-book-emoji{font-size:30px;flex:0 0 auto}.dd-book-main{flex:1 1 auto;min-width:0}.dd-book-title{display:block;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dd-book-meta{display:block;font-size:13px;color:#7a8899;margin-top:2px}.dd-book-arrow{flex:0 0 auto;font-size:26px;color:#c3ccd8}@media (max-width: 600px){.dd-title{font-size:15px}.dd-pageinfo{font-size:13px}.dd-pill{padding:8px 11px;font-size:13px;min-height:40px}.dd-now-text{font-size:17px}.dd-round{width:56px;height:56px;font-size:21px}.dd-round-sm{width:46px;height:46px}.dd-stage{position:relative;gap:0;padding:4px}.dd-arrow{position:absolute;top:50%;z-index:3;width:46px;height:46px;font-size:26px;transform:translateY(-50%);background:#ffffffdb}.dd-arrow-prev{left:6px}.dd-arrow-next{right:6px}.dd-chip{min-width:46px;min-height:42px;font-size:16px}.dd-unit-title{min-height:56px}}:root{--color-primary: #4ecdc4;--color-accent: #ffe66d;--color-bg: #f7f9fc;--color-text: #2d3436}*{box-sizing:border-box}html,body,#root{min-height:100vh;min-height:100dvh}body{margin:0;font-family:system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif;background:var(--color-bg);color:var(--color-text);-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}button{font-family:inherit;cursor:pointer;transition:transform .1s,opacity .1s;min-height:44px;max-width:100%}button:active:not(:disabled){transform:scale(.96)}button:disabled{cursor:default}input{font-family:inherit}img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none}@keyframes pop{0%{transform:scale(.3);opacity:0}60%{transform:scale(1.2);opacity:1}to{transform:scale(1);opacity:1}}@media (max-width: 600px){h1{font-size:24px!important}}