:root{--primary-color:#007AFF;--accent-color:#FF9500;--bg-color:#F2F2F7;--text-main:#1C1C1E;--text-sub:#8E8E93;--border-color:#C7C7CC;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--glass-border:1px solid rgba(0, 0, 0, 0.15)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);height:100vh;height:100dvh;overflow:hidden}.hidden{display:none!important}.icon{width:20px;height:20px;fill:currentColor;display:inline-block;vertical-align:middle}.btn-rect{padding:0 12px;border-radius:8px;border:none;cursor:pointer;font-size:14px;font-weight:600;background-color:#fff;color:var(--primary-color);transition:all .2s;display:inline-flex;align-items:center;justify-content:center;gap:6px;box-shadow:0 1px 3px rgba(0,0,0,.1);height:36px;white-space:nowrap}.btn-rect:active{transform:scale(.96);opacity:.8}.btn-rect:disabled{background-color:#e5e5ea;color:#aeaeb2;cursor:not-allowed;box-shadow:none;transform:none;opacity:1}.btn-circle-solid{width:48px;height:48px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .2s;box-shadow:0 4px 8px rgba(0,0,0,.15)}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-secondary{background-color:#f5f5f7;color:var(--text-main)}.btn-secondary:active{background-color:#e5e5ea}.btn-secondary:disabled{opacity:.4;cursor:not-allowed;transform:none}.btn-circle-solid:active{transform:scale(.9)}.btn-icon-glass{width:40px;height:40px;border-radius:50%;border:1px solid rgba(0,0,0,.15);background-color:transparent;color:var(--text-main);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.btn-icon-glass:hover{background-color:rgba(0,0,0,.05)}.btn-icon-glass:active{transform:scale(.95);background-color:rgba(0,0,0,.1)}#view-list{display:flex;flex-direction:column;height:100vh;height:100dvh}.header-area{height:56px;background:#fff;border-bottom:1px solid #ddd;display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-md);flex-shrink:0;z-index:10}.header-title{font-size:22px;font-weight:700;text-align:center;flex-grow:1;color:var(--text-main)}.filter-area{background:#f9f9f9;padding:12px var(--spacing-md);border-bottom:1px solid #eee;flex-shrink:0;z-index:9}.filter-container{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.filters-group{display:flex;gap:8px;flex-wrap:wrap;align-items:center}select{padding:0 12px;height:36px;border-radius:8px;border:1px solid #ccc;background:#fff;font-size:14px;font-family:inherit;color:var(--text-main);min-width:80px}.ops-group{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.btn-group-wrapper{position:relative;display:inline-block}.btn-group-container{display:flex;box-shadow:0 1px 3px rgba(0,0,0,.1);border-radius:8px;background:#fff}.btn-group-main{border-top-right-radius:0;border-bottom-right-radius:0;border-right:1px solid #eee;margin-right:0;padding-right:10px;box-shadow:none;width:120px;justify-content:center}.btn-group-arrow{border-top-left-radius:0;border-bottom-left-radius:0;padding:0 6px;margin-left:0;width:30px;box-shadow:none}.dropdown-menu{position:absolute;top:105%;left:0;background:#fff;border:1px solid #ddd;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);width:150px;display:none;flex-direction:column;z-index:100;overflow:hidden}.dropdown-menu.show{display:flex}.dropdown-item{padding:12px 16px;text-align:left;border:none;background:0 0;cursor:pointer;display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-main);width:100%}.dropdown-item:hover{background-color:#f0f0f0}.list-area{flex-grow:1;overflow-y:auto;padding:var(--spacing-md);background-color:#fff}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px;padding-bottom:60px}@media (max-width:500px) and (orientation:portrait){.books-grid{grid-template-columns:1fr 1fr;gap:12px}}.book-item{display:flex;flex-direction:column;cursor:pointer;transition:transform .2s;position:relative;height:360px;width:100%;margin:0 auto;background:#fff;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.08);overflow:hidden;border:3px solid rgba(0,0,0,.06)}@media (max-width:500px) and (orientation:portrait){.book-item{height:300px}}.book-item:hover{transform:translateY(-4px)}.book-item.selected{border-color:var(--primary-color)}.book-cover-wrapper{flex:1;width:100%;position:relative;background-color:#f0f0f0;overflow:hidden}.book-cover-img{width:100%;height:100%;object-fit:cover}.book-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;text-align:center;padding:15px;color:#fff;font-weight:900;font-size:1.5rem;text-transform:uppercase;text-shadow:0 2px 4px rgba(0,0,0,.2)}.lexile-badge{position:absolute;top:10px;right:10px;background-color:var(--accent-color);color:#fff;font-size:16px;font-weight:600;padding:4px 8px;border-radius:6px;z-index:2;box-shadow:0 2px 4px rgba(0,0,0,.2)}.selection-mark{position:absolute;top:10px;left:10px;width:28px;height:28px;background-color:var(--primary-color);border-radius:50%;color:#fff;display:none;align-items:center;justify-content:center;font-size:16px;font-weight:700;z-index:2;box-shadow:0 2px 4px rgba(0,0,0,.2)}.book-item.selected .selection-mark{display:flex}.book-title{padding:8px 10px 12px 10px;font-size:17px;font-weight:700;height:68px;flex-shrink:0;color:#333;background:#fff;display:flex;align-items:center;justify-content:center}.book-title span{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;width:100%;text-align:center;line-height:1.3;max-height:2.6em;word-break:break-word}.list-end-msg{grid-column:1/-1;text-align:center;color:#999;padding:20px;font-size:14px}#view-reader{display:flex;flex-direction:column;height:100vh;height:100dvh;transition:background-color .3s}.reader-header{height:60px;min-height:60px;padding:0 var(--spacing-md);background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,.05);display:grid;grid-template-columns:48px 1fr 48px;align-items:center;flex-shrink:0;z-index:20}.reader-title-box{text-align:center;display:flex;flex-direction:column;justify-content:center;overflow:hidden}.reader-title-main{font-size:20px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reader-title-sub{font-size:12px;color:var(--text-sub);margin-top:2px}.reader-content{flex-grow:1;display:flex;flex-direction:column;overflow:hidden;position:relative}.reader-toggles{padding:15px;display:flex;justify-content:center;gap:20px;flex-shrink:0}.switch-btn{background-color:#e5e5ea;padding:8px 16px;border-radius:24px;display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;font-weight:600;transition:all .3s;user-select:none;min-width:150px;justify-content:center}.switch-btn.active{background-color:#34c759;color:#fff;box-shadow:0 2px 5px rgba(52,199,89,.3)}.switch-btn:hover{transform:scale(1.02)}.switch-status{margin-left:12px;font-weight:700;opacity:.9;font-size:10px}.reader-text-area{flex-grow:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:0 24px;text-align:center;overflow:hidden;position:relative}.text-next,.text-prev{font-size:20px;color:rgba(0,0,0,.3);height:1.5em;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;max-width:100%;margin:10px 0;transition:opacity .3s,transform .3s;font-family:inherit}@media (max-height:500px){.text-next,.text-prev{display:none!important}}.text-current{font-family:inherit;font-weight:500;line-height:1.3;transition:font-size .2s,transform .3s;cursor:pointer;margin:10px 0}.word-span{display:inline-block;padding:2px 4px;border-radius:6px;cursor:pointer;transition:background-color .2s}.word-span:active{background-color:rgba(0,122,255,.2)}.reader-bottom-status{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg);padding-right:20px;position:relative}.page-indicator{position:absolute;left:50%;transform:translateX(-50%);font-size:15px;color:var(--text-sub);font-weight:600}.trans-btn{margin-left:auto;margin-right:0;cursor:pointer;color:var(--text-sub);transition:all .2s;display:flex;align-items:center;justify-content:center;width:32px;height:32px}.trans-btn.active{color:var(--primary-color);transform:scale(1.1)}.trans-btn text{font-weight:400!important}.translation-overlay{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);background-color:rgba(0,0,0,.85);color:#fff;padding:12px 24px;border-radius:8px;font-size:18px;font-family:"PingFang SC","Microsoft YaHei",sans-serif;text-align:center;max-width:90%;opacity:0;transition:opacity .5s;pointer-events:none;z-index:50;box-shadow:0 4px 12px rgba(0,0,0,.3)}.translation-overlay.show{opacity:1}.control-area{background:#fff;padding:20px 0;display:flex;align-items:center;justify-content:center;gap:20px;box-shadow:0 -4px 20px rgba(0,0,0,.05);flex-shrink:0;z-index:20;padding-bottom:max(20px,env(safe-area-inset-bottom))}.btn-ctrl-sm{width:54px;height:54px}.btn-ctrl-sm .icon{width:24px;height:24px}.btn-ctrl-lg{width:80px;height:80px;box-shadow:0 6px 15px rgba(0,122,255,.3)}.btn-ctrl-lg .icon{width:40px;height:40px}.reading-list-popup{position:fixed;bottom:0;left:0;width:100%;height:50%;background:#fff;border-top-left-radius:24px;border-top-right-radius:24px;box-shadow:0 -10px 40px rgba(0,0,0,.2);z-index:100;transform:translateY(100%);transition:transform .3s cubic-bezier(.2, .8, .2, 1);display:flex;flex-direction:column}.reading-list-popup.show{transform:translateY(0)}.rl-header{padding:16px 24px;border-bottom:1px solid #f0f0f0;display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:20px}.rl-close-btn{width:36px;height:36px;border-radius:50%;background:#f2f2f7;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#666}.rl-content{flex-grow:1;overflow-y:auto;padding:10px}.rl-item{padding:16px;border-bottom:1px solid #f9f9f9;display:flex;align-items:center;gap:16px;cursor:pointer;border-radius:12px;margin:0 10px}.rl-item:active{background:#f5f5f5}.rl-index{width:32px;height:32px;background:#eee;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;color:#666;font-weight:700;flex-shrink:0}.rl-item.active .rl-index{background:var(--primary-color);color:#fff}.rl-backdrop{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.4);z-index:99;display:none;opacity:0;transition:opacity .3s}.rl-backdrop.show{display:block;opacity:1}#view-vocab{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:70%;height:70%;background:#fff;z-index:200;display:flex;flex-direction:column;opacity:0;pointer-events:none;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.4);border:1px solid rgba(0,0,0,.05)}#view-vocab.show{opacity:1;pointer-events:auto;transition:opacity 2s ease}.vocab-backdrop{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.4);z-index:199;display:none;opacity:0;transition:opacity .3s}.vocab-backdrop.show{display:block;opacity:1}.vocab-header{height:60px;padding:0 var(--spacing-md);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #eee;background:#f9f9f9;border-top-left-radius:20px;border-top-right-radius:20px}.vocab-content{flex-grow:1;background:#fff;position:relative;border-bottom-left-radius:20px;border-bottom-right-radius:20px}iframe{width:100%;height:100%;border:none;border-radius:inherit}.settings-popover{position:absolute;top:65px;right:15px;width:280px;background:#fff;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.15);padding:20px;z-index:150;display:none;border:1px solid rgba(0,0,0,.05)}.settings-popover.show{display:block}.settings-popover::before{content:'';position:absolute;top:-8px;right:14px;border-left:8px solid transparent;border-right:8px solid transparent;border-bottom:8px solid #fff}.setting-item{margin-bottom:24px}.setting-label{font-size:14px;color:#888;margin-bottom:10px;display:block;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.font-control{display:flex;align-items:center;justify-content:space-between;background:#f2f2f7;border-radius:12px;padding:4px}.font-btn{width:48px;height:40px;display:flex;align-items:center;justify-content:center;font-size:24px;cursor:pointer;color:var(--primary-color);background:#fff;border-radius:10px;box-shadow:0 2px 5px rgba(0,0,0,.05);user-select:none}.font-btn:active{transform:scale(.95)}.font-val{font-size:16px;font-weight:700;color:var(--text-main)}.mode-switch{display:flex;background:#f2f2f7;border-radius:12px;padding:4px}.mode-opt{flex:1;text-align:center;padding:10px 0;font-size:14px;border-radius:10px;cursor:pointer;color:#8e8e93;transition:all .2s;font-weight:500}.mode-opt.active{background:#fff;box-shadow:0 2px 5px rgba(0,0,0,.1);font-weight:700;color:var(--primary-color)}.color-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.color-option{width:36px;height:36px;border-radius:50%;border:2px solid transparent;cursor:pointer;box-shadow:0 2px 5px rgba(0,0,0,.1);position:relative}.color-option.active{border-color:var(--primary-color);transform:scale(1.1)}@media (orientation:portrait){.filter-container{flex-direction:column;align-items:stretch;gap:10px}.filters-group,.ops-group{width:100%;justify-content:space-between}select{flex:1}#view-vocab{width:90%;height:80%}}