@font-face{font-family:StudySans;src:local('Microsoft YaHei UI'),local('PingFang SC');font-style:normal;font-weight:100 900;font-display:swap}
:root{--page:#f4f7f5;--paper:#fff;--ink:#253b37;--muted:#596d62;--line:#e3eae6;--green:#147d68;--green-dark:#116b59;--green-light:#e9f5ef;--radius:16px;--shadow:0 3px 12px #25493e04;--font:StudySans,'Segoe UI','Microsoft YaHei',sans-serif}
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#245f5f11;position:relative;overflow:hidden;color:white}.game-panel:before{content:'';position:absolute;right:-80px;top:-135px;width:340px;height:340px;border:1px solid #ffffff12;border-radius:50%;pointer-events:none}.game-topline{display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative}.level-label{display:flex;align-items:center;gap:12px}.level-icon{width:42px;height:42px;background:#ffffff1c;border:1px solid #ffffff24;border-radius:12px;display:grid;place-items:center;color:#e2ffeb}.level-icon .icon{width:23px;height:23px}.level-kicker{font-size:11px;color:#52685e;letter-spacing:.5px}.level-label h2{font-size:22px;line-height:1.5;font-weight:600;letter-spacing:.3px}.level-label h2 span{font-size:12px;font-weight:400;margin-left:12px;color:#e1f7f4;letter-spacing:0}.restart-button{display:flex;gap:6px;align-items:center;font-size:12px;color:#e0f5f2;padding:8px 0;min-height:44px}.restart-button 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1fr;gap:24px}.record-panel{padding:24px;min-height:268px}.record-panel>h2{font-size:15px;font-weight:500;margin-bottom:24px}.book-record{margin:22px 0}.book-record-head{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:#52685e;margin-bottom:9px}.book-record-head>span:last-child{color:#52685e;font-size:11px}.book-record .book-progress{height:8px}.recent-row{padding:13px 0;border-bottom:1px solid #edf3eb;display:flex;justify-content:space-between;gap:15px;font-size:12px}.recent-row:last-child{border:0}.recent-row small{display:block;font-size:10px;color:#52685e;margin-top:3px}.recent-row>strong{font-weight:500;color:#52685e;white-space:nowrap}.empty-records{padding:35px 0;color:#52685e;font-size:12px;text-align:center;line-height:2}.app-dialog{border:1px solid #e1e8e0;border-radius:20px;padding:0;max-width:calc(100vw - 32px);width:500px;max-height:calc(100svh - 48px);color:var(--ink);box-shadow:0 24px 100px #153c3930;background:#fff}.app-dialog::backdrop{background:#173e3c60;backdrop-filter:blur(5px)}.dialog-inner{padding:28px 30px}.dialog-header{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:12px}.dialog-header h2{font-size:21px;font-weight:600}.dialog-header .icon-button{margin:-9px -10px -9px 0}.dialog-lead{font-size:13px;line-height:1.9;color:#52685e;margin:8px 0 22px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px}.dialog-actions .primary-button{min-width:130px}.setting-row{padding:17px 0;border-bottom:1px solid #ecf1ea;display:flex;justify-content:space-between;align-items:center;gap:20px}.setting-label>span{font-size:14px;display:block;font-weight:500}.setting-label>small{display:block;font-size:11px;color:#52685e;margin-top:4px}.segmented{display:flex;gap:4px;padding:3px;background:#f2f6f0;border-radius:7px}.segmented button{min-width:40px;min-height:36px;border-radius:5px;font-size:12px;color:#52685e}.segmented button.active{background:white;color:var(--green);box-shadow:0 1px 4px #253e2c0f}.switch{position:relative;width:44px;height:26px;background:#dbe5db;border-radius:20px;border:0;flex:none;min-height:26px}.switch:after{content:'';position:absolute;left:3px;top:3px;width:20px;height:20px;background:white;border-radius:50%;box-shadow:0 1px 3px #1a392b20;transition:transform .2s}.switch[aria-checked=true]{background:var(--green)}.switch[aria-checked=true]:after{transform:translateX(18px)}.danger-button{font-size:12px;color:#52685e;padding:10px 0;min-height:44px;margin-top:12px}.danger-button:hover{color:#98482e}.form-label{display:block;font-size:12px;color:#597965;margin:16px 0 7px}.form-input{display:block;width:100%;border:1px solid #dce6da;background:#fbfdf9;padding:11px 12px;border-radius:8px;font-size:14px;min-height:44px;color:var(--ink)}textarea.form-input{min-height:165px;resize:vertical;font-family:var(--font);line-height:1.9;font-size:13px}.input-example{font-family:'Segoe UI',var(--font);font-size:12px;padding:12px;background:#f2f7f0;border-radius:8px;color:#52685e;line-height:1.9;margin-top:12px;overflow-wrap:anywhere}.form-error{font-size:12px;color:#ac5e40;margin-top:10px;line-height:1.7}.file-import-row{display:flex;gap:12px;align-items:center;margin-top:14px;color:#52685e;font-size:11px}.file-import-row input{max-width:100%;min-height:44px;font-size:11px}.file-import-row input::file-selector-button{padding:8px 12px;border:1px solid #dce6da;border-radius:6px;background:white;color:#52685e;cursor:pointer;margin-right:8px;font:inherit}.help-step{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid #edf1e9}.step-number{height:31px;width:31px;background:#edf5e9;color:#52685e;border-radius:8px;font-size:12px;display:grid;place-items:center;flex:none}.help-step h3{font-size:14px;font-weight:500;margin-bottom:4px}.help-step p{font-size:12px;color:#52685e;line-height:1.8}.help-note{font-size:11px;color:#52685e;line-height:1.9;background:#f6f8f2;padding:12px 15px;border-radius:8px;margin-top:20px}.result-emblem{display:grid;place-items:center;background:#eff8e8;width:62px;height:62px;color:#52685e;border-radius:50%;margin:0 auto 14px}.result-emblem .icon{width:30px;height:30px}.result-title{text-align:center;font-size:25px;font-weight:600!important;margin:0 0 8px}.result-subtitle{text-align:center;color:#52685e;font-size:12px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);background:#f4f8ef;padding:18px 6px;margin:24px 0 18px;border-radius:12px;text-align:center}.result-stats strong{font-size:22px;font-weight:500;color:#527b53;font-family:'Segoe UI',var(--font);display:block;line-height:1.4}.result-stats span{font-size:10px;color:#52685e}.review-list{max-height:190px;overflow:auto;scrollbar-width:thin}.review-row{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid #edf3e8;padding:10px 0}.review-row>div{min-width:0}.review-row>div>strong{display:block;font-size:13px;font-weight:500;color:#52685e;overflow-wrap:anywhere}.review-row>div>span{display:block;font-size:10px;color:#52685e;margin-top:2px}.review-row .icon-button{flex:none}.review-row .starred{color:#52685e}.review-row .starred .icon{fill:#f8edc4}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);max-width:calc(100vw - 40px);padding:12px 22px;background:#29483f;color:#f6fff7;font-size:13px;line-height:1.7;border-radius:10px;box-shadow:0 8px 30px #173c3920;z-index:20;pointer-events:none;text-align:center}.noscript-message{padding:20px;background:#fff4d6;text-align:center;color:#7c6235}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}@keyframes tile-away{to{transform:scale(.65);opacity:0}}@keyframes confetti{to{transform:translate(var(--tx),var(--ty)) rotate(var(--r));opacity:0}}@keyframes harvest-in{from{transform:translateY(4px);opacity:0}to{transform:translateY(0);opacity:1}}.page-heading{animation:harvest-in .45s both}.game-panel{animation:harvest-in .5s .04s both}
@media(min-width:901px){.site-header{height:72px}.app-container{padding-top:28px}.page-heading{margin-bottom:22px}.eyebrow{margin-bottom:6px}.book-toolbar{min-height:72px;padding-top:10px;padding-bottom:10px;margin-bottom:20px}.game-panel{padding-top:20px;padding-bottom:18px}.game-stats{margin-top:17px;margin-bottom:12px}.game-progress{margin-bottom:17px}.board-container{padding:14px;min-height:284px}.board{gap:10px}.word-tile{min-height:56px}.board-message{min-height:36px}.current-book-info{margin-top:11px;margin-bottom:16px}.match-history{max-height:150px}.app-footer{padding-top:22px}}
@media(min-width:1500px){.app-container{padding-top:36px}.page-heading{margin-bottom:26px}.book-toolbar{margin-bottom:24px}.game-panel{padding:25px 30px 22px}.word-tile{min-height:68px;font-size:17px}.word-tile.long-word{font-size:14px}.board-container{min-height:338px}.game-stats{margin-top:23px}.study-sidebar{gap:20px}.match-history{max-height:214px}}
@media(max-width:1279px){.header-inner,.app-container,.app-footer{margin-left:32px;margin-right:32px;padding-left:0;padding-right:0}.header-inner{gap:36px}.practice-grid{grid-template-columns:minmax(0,1fr) 246px;gap:20px}.game-panel{padding:22px}.board{gap:10px}.board-container{padding:13px}.word-tile{font-size:14px;min-height:65px}.word-tile.long-word{font-size:12px}.current-book-card,.match-card{padding:17px}.current-book-info{gap:12px}.book-cover{width:56px;height:78px}.keyboard-tip{display:none}.current-book-info h2{font-size:14px}.current-book-info p{font-size:9px}.library-controls{gap:12px}.filter-tab{padding:8px 9px}}
@media(max-width:1050px){.practice-grid{grid-template-columns:minmax(0,1fr) 220px;gap:18px}.game-panel{padding:20px}.game-stat{padding-left:14px}.word-tile{min-height:65px;font-size:13px}.word-tile.long-word{font-size:11px}.board{gap:8px}.board-container{padding:12px}.level-label h2{font-size:20px}.level-label h2 span{margin-left:8px;font-size:11px}.game-stat strong{font-size:24px}.book-details{display:none}.book-toolbar{gap:15px}.toolbar-right{gap:15px}.book-cover{width:50px;height:72px}.book-cover strong{font-size:27px}.current-book-info{gap:10px}.current-book-info p{white-space:normal;font-size:10px}.book-tag{font-size:8px}.main-nav{gap:24px}.header-inner{gap:32px}.brand{font-size:19px}.header-actions{gap:5px}.header-divider{margin:0 5px}.match-empty p{font-size:10px}.tip-card{padding:14px 13px;gap:8px}.game-panel .game-controls .tool-key{display:none}.library-controls{flex-wrap:wrap}.search-field{flex-basis:100%}.library-controls .primary-button{margin-left:auto}.record-stats{gap:14px}.record-stat{padding:19px}.record-grid{gap:18px}}
@media(max-width:900px){.header-inner,.app-container,.app-footer{margin-left:28px;margin-right:28px}.header-inner{gap:35px}.header-actions{gap:6px}.header-divider,.learner-avatar{display:none}.main-nav{gap:24px}.site-header{height:74px}.practice-grid{grid-template-columns:1fr}.study-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:18px}.tip-card{display:none}.current-book-card{padding:18px 20px}.match-card{padding:18px 20px;min-height:0}.current-book-info{margin:12px 0 16px;gap:15px}.book-cover{width:52px;height:65px}.book-cover strong{font-size:25px}.current-book-info h2{font-size:15px}.match-history{height:132px;max-height:132px}.match-empty{height:128px;gap:5px}.empty-leaf{height:30px;width:30px}.match-empty p{font-size:11px}.game-panel{padding:24px 26px}.board-container{padding:16px}.board{gap:12px}.word-tile{font-size:16px;min-height:69px}.word-tile.long-word{font-size:13px}.level-label h2 span{font-size:12px;margin-left:12px}.game-stats{margin-top:23px}.game-stat{padding-left:24px}.game-stat strong{font-size:27px}.game-controls .tool-key{display:inline-grid!important}.game-tools{gap:12px}.game-tool{padding:8px 16px}.game-controls{margin-top:0}.app-container{padding-top:30px}.page-heading{margin-bottom:24px}h1{font-size:29px}.app-footer{padding-top:24px}.practice-footnote{margin-top:16px}.record-grid{grid-template-columns:1fr}.book-progress-label{font-size:11px}.book-tag{font-size:9px}.board-message{font-size:12px}.record-stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:639px){.site-header{height:117px}.header-inner{height:65px;position:relative;margin:0 20px;gap:0;flex-wrap:wrap}.brand{font-size:19px;gap:9px}.brand img{width:32px;height:32px}.header-actions{margin-left:auto;gap:3px}.header-actions .icon-button{width:36px;height:42px}.main-nav{position:absolute;top:65px;height:52px;left:-20px;right:-20px;gap:0;padding:0 20px;border-top:1px solid #f1f5ef;justify-content:space-between}.nav-item{font-size:13px;padding:0 12px}.nav-item.active:after{left:12px;right:12px;height:2px}.app-container{margin:0;padding:25px 20px 0;min-height:calc(100svh - 200px)}.page-heading{margin-bottom:20px;align-items:flex-start;gap:8px}.eyebrow{font-size:9px;letter-spacing:.5px;margin-bottom:7px}.eyebrow .tiny-dot{width:5px;height:5px}h1{font-size:25px;letter-spacing:-.5px}.page-description{font-size:11px;margin-top:7px;line-height:1.9;max-width:260px}.help-button{font-size:0;min-height:36px;padding:6px 0 6px 8px;margin-top:19px}.help-button .icon{width:20px;height:20px}.book-toolbar{padding:12px;margin-bottom:18px;gap:10px;border-radius:10px;min-height:73px}.book-mini{width:33px;height:39px;border-radius:6px}.book-mini .icon{width:20px;height:20px}.book-picker{gap:9px;min-width:0}.book-picker label{font-size:9px}.book-picker select{font-size:13px;min-width:0;width:156px;max-width:100%;height:28px}.toolbar-separator,.saved-status{display:none}.toolbar-right{gap:0;flex:none}.text-button{font-size:10px;gap:5px;padding:0;min-height:44px}.text-button .icon{width:15px;height:15px}.game-panel{border-radius:13px;padding:18px 15px 17px}.level-label{gap:9px}.level-icon{width:34px;height:37px;border-radius:9px}.level-icon .icon{width:20px;height:20px}.level-kicker{font-size:9px;letter-spacing:0}.level-label h2{font-size:19px;line-height:1.5}.level-label h2 span{display:none}.restart-button{font-size:10px;gap:4px;min-height:44px}.restart-button .icon{width:14px;height:14px}.game-stats{margin:19px 0 12px}.game-stat{padding-left:12px}.game-stat>span{font-size:9px;gap:3px;white-space:nowrap}.game-stat>span .icon{width:11px;height:11px}.game-stat strong{font-size:22px;line-height:1.7;letter-spacing:0}.game-stat small{font-size:9px}.game-progress{margin-bottom:17px;height:3px}.board-container{padding:10px;border-radius:10px;min-height:360px}.board{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.word-tile{min-height:60px;font-size:13px;border-radius:6px;padding:6px 4px;border-bottom-width:3px;line-height:1.35}.word-tile.long-word{font-size:11px}.board-message{min-height:43px;font-size:10px;gap:5px;padding:8px 3px}.game-tools{gap:7px}.game-tool{padding:7px 9px;font-size:10px;min-height:44px;border-radius:7px;gap:5px}.game-tool .icon{width:14px;height:14px}.game-controls .tool-key{display:none!important}.play-button{min-width:109px;min-height:44px;font-size:11px;padding:9px 12px;gap:12px;border-radius:7px}.play-button .icon{width:15px;height:15px}.study-sidebar{display:none}.practice-footnote{font-size:9px;justify-content:center;margin-top:14px}.practice-footnote .icon{height:11px;width:11px}.app-footer{margin:0;padding:26px 20px 22px;display:flex;justify-content:center;gap:8px;flex-direction:column;font-size:9px;line-height:1.4}.app-footer img{width:15px;height:15px}.app-footer>span:last-child{font-size:8px;color:#52685e}.board-overlay{padding:18px}.board-overlay h3{font-size:20px}.board-overlay p{font-size:11px;line-height:1.8}.overlay-button{font-size:12px}.board-overlay .overlay-icon{width:48px;height:48px}.library-controls{padding:14px;gap:12px}.search-field{height:44px}.filter-tabs{width:100%;gap:5px}.filter-tab{font-size:11px;justify-content:center;padding:8px 6px;flex:1;min-height:44px}.library-controls .primary-button{width:100%;font-size:12px}.list-heading{padding:11px 15px;font-size:9px}.word-row{padding:13px 12px;gap:8px;align-items:flex-start}.word-number{width:18px;font-size:10px;padding-top:3px}.word-meaning{font-size:12px;margin-bottom:6px}.word-terms{font-size:13px;line-height:1.9}.word-term:not(:last-child):after{margin:0 5px;font-size:10px}.row-actions{gap:0;flex-direction:column}.row-actions .icon-button{width:32px;height:36px}.row-actions .icon{width:16px;height:16px}.word-row-content{padding-top:2px}.list-pagination{padding:12px 15px;font-size:10px}.list-pagination>div{gap:8px}.list-pagination .icon-button{width:32px;height:38px}.data-note{font-size:10px;margin-top:13px}.record-stats{gap:12px;margin-bottom:18px}.record-stat{padding:17px}.record-stat>span{font-size:11px}.record-stat>strong{font-size:27px}.record-stat>strong small{font-size:10px}.record-panel{padding:20px}.record-panel>h2{font-size:14px}.recent-row{font-size:11px}.app-dialog{width:440px;border-radius:16px;max-width:calc(100vw - 28px)}.dialog-inner{padding:24px 21px}.dialog-header h2{font-size:19px}.dialog-lead{font-size:12px}.dialog-actions .primary-button{min-width:0}.dialog-actions{gap:8px}.dialog-actions button{font-size:12px;flex:1;padding-left:10px;padding-right:10px}.setting-row{gap:12px}.setting-label>span{font-size:13px}.setting-label>small{font-size:10px}.segmented button{min-width:34px}.file-import-row{flex-wrap:wrap}.result-title{font-size:23px}.toast{bottom:20px;font-size:12px;white-space:normal}.help-note{font-size:10px}.review-row>div>strong{font-size:12px}}
@media(max-width:359px){.header-inner{margin:0 14px}.brand{font-size:18px}.main-nav{left:-14px;right:-14px;padding:0 14px}.app-container{padding:21px 14px 0}.book-toolbar{padding:10px}.book-picker select{width:135px;font-size:12px}.book-picker{gap:7px}.text-button{font-size:9px;gap:4px}.book-mini{width:29px}.game-panel{padding:16px 11px}.board-container{padding:8px}.board{gap:6px}.word-tile{font-size:11px;min-height:58px;padding:6px 3px}.word-tile.long-word{font-size:10px}.game-stat{padding-left:9px}.game-stat strong{font-size:20px}.game-stat>span{font-size:8px}.game-stat>span .icon{display:none}.game-controls{gap:8px}.game-tool{padding:7px 8px;font-size:9px}.play-button{min-width:99px;font-size:10px;gap:8px}.game-tools{gap:6px}.board-container{min-height:340px}.restart-button{font-size:9px}.page-description{font-size:10px}.page-heading{gap:4px}h1{font-size:24px}.book-picker label{font-size:8px}.book-picker select{max-width:140px}.filter-tab{font-size:10px}.word-meaning{font-size:11px}.word-terms{font-size:12px}.record-stat{padding:14px}.record-stat>strong{font-size:24px}}
@media(max-width:639px){.board{grid-template-columns:repeat(3,minmax(0,1fr))}.word-tile{min-height:56px;font-size:13px;overflow-wrap:normal;word-break:normal;hyphens:none}.word-tile.long-word{font-size:11px;letter-spacing:-.1px}.board-container{min-height:0}.game-panel{display:flex;flex-direction:column}.game-topline{order:0}.game-stats{order:1}.game-progress{order:2}.game-controls{order:3;margin-bottom:16px}.board-container{order:4}.board-message{order:5;min-height:39px;padding-bottom:0}}
@media(max-width:359px){.word-tile{font-size:12px}.word-tile.long-word{font-size:10px}}
.game-panel .level-kicker,.game-panel .game-stat small{color:#e5faf5}
.word-tile:focus-visible{outline:3px solid #ffdf7a;outline-offset:2px}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.word-tile.correct,.word-tile.selected{transform:none}.confetti{display:none}}