@charset "UTF-8";
:root{--ink:#243c37;--muted:#788680;--green:#246b59;--light:#eaf2e9;--orange:#d68c4b;--border:#e4e9e1;--paper:#f7f8f3;--white:#fff;--radius:20px;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button,a,input,select{-webkit-tap-highlight-color:transparent}button{color:inherit}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c99749;outline-offset:3px}a{color:var(--green)}.icon{width:22px;height:22px;flex-shrink:0;vertical-align:middle}button .icon{pointer-events:none}h1,h2,h3,p{margin-top:0}h1{font-size:29px;letter-spacing:.4px;line-height:1.5;margin-bottom:8px}h2{font-size:19px;line-height:1.5}h3{font-size:17px}p{line-height:1.85;font-size:14px;color:#697a73}small{font-size:12px}.muted,.footnote{color:var(--muted);font-size:13px}.footnote{line-height:1.9;margin-top:20px}.sidebar{position:fixed;inset:0 auto 0 0;width:232px;background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:36px 20px 24px;z-index:10}.brand{display:flex;gap:12px;align-items:center;text-align:left;border:0;background:none;padding:0 5px;font-size:20px;letter-spacing:1px;font-weight:750;white-space:nowrap}.brand small{display:block;font-weight:400;font-size:10px;letter-spacing:1px;color:var(--muted);margin-top:7px}.brand-mark{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;background:var(--green);color:#f9f6e7}.brand-mark .icon{width:25px;height:25px}.sidebar-label{font-size:11px;color:#9aa69e;letter-spacing:2px;margin:52px 15px 15px}.nav-item{width:100%;display:flex;gap:13px;align-items:center;border:0;background:none;padding:15px 18px;border-radius:12px;font-size:14px;color:#7b8780;margin-bottom:8px;text-align:left;min-height:48px}.nav-item.active{background:#edf4ed;color:var(--green);font-weight:650}.nav-item.active .icon{stroke-width:2}.nav-item:hover:not(.active){background:#f8faf6}.nav-item b{margin-left:auto;font-size:10px;border-radius:50%;background:var(--green);color:#fff;padding:3px 5px}.sidebar-note{margin:auto 8px 30px;background:#f8f8f0;border:1px solid #eeeeE3;padding:21px 14px;border-radius:14px}.sidebar-note p{font-size:12px;color:#667d6b;margin:10px 0 3px}.sidebar-note small{font-size:11px;color:#9aA28e}.tiny-stars{color:#c7ad63;font-size:26px}.settings{font-size:12px;padding-left:12px;margin:0}.settings .icon{width:19px}.main-wrap{margin-left:232px}.topbar{height:80px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 44px;background:#fafbf7}.breadcrumb{font-size:12px;color:#8a968e}.breadcrumb span{margin:0 12px;color:#c7cec6}.top-status{font-size:11px;color:#839085;display:flex;align-items:center;gap:7px}.status-dot{width:6px;height:6px;background:#71a98a;border-radius:50%}#main{max-width:1232px;margin:auto;padding:38px 44px 30px}.page-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.eyebrow{color:#819384;font-size:11px;letter-spacing:2px;margin-bottom:10px}.page-heading p{margin:0;font-size:13px}.date-label{font-size:11px;color:#8a978c;align-self:flex-start;margin-top:12px;white-space:nowrap}.heading-spark{font-size:34px;color:#c3ac6b;display:inline-block;margin-left:12px;font-weight:400}.hero{position:relative;overflow:hidden;display:flex;background:#e9f0e5;border:1px solid #e1e9dc;border-radius:22px;min-height:318px}.hero-copy{padding:30px 34px;position:relative;z-index:1;width:58%}.pill{display:inline-flex;align-items:center;gap:6px;font-size:10px;border:1px solid #cddcc6;border-radius:30px;padding:5px 10px;color:#5d7d5a;background:#eff4e9}.pill .icon{width:13px;height:13px}.hero h2{font-size:32px;line-height:1.6;letter-spacing:1.5px;margin:15px 0 9px;color:#2c5343}.hero p{font-size:12px;line-height:1.9;color:#71856f;margin-bottom:22px}.btn{border:1px solid transparent;border-radius:9px;display:inline-flex;justify-content:center;align-items:center;gap:12px;padding:12px 20px;font-size:13px;min-height:45px;text-decoration:none;transition:transform .15s,background .15s;white-space:nowrap}.btn:not(:disabled):hover{transform:translateY(-1px)}.btn .icon{width:18px;height:18px}.primary{background:var(--green);color:#fff}.primary:hover:not(:disabled){background:#1b5949}.secondary{background:#fff;border-color:#dbe3d9;color:#647c6a}.hero-duration{display:inline-flex;align-items:center;gap:5px;color:#83937b;font-size:10px;margin-left:13px}.hero-duration .icon{width:13px;height:13px}.hero-art{position:absolute;width:41%;height:100%;right:0;top:0}.art-orbit{position:absolute;inset:26px 30px 18px -20px;border:1px dashed #b9cbb0;border-radius:50%;transform:rotate(-25deg);opacity:.55}.floating-card{width:70px;height:88px;border:1px solid #efeadc;background:#fffcf3;box-shadow:0 7px 0 #d6dfcc,0 10px 20px #486b3b0d;border-radius:13px;display:grid;place-items:center;color:#537753;font:600 42px Georgia,serif;position:absolute;top:67px}.card-four{left:0;transform:rotate(-13deg)}.card-six{left:118px;top:48px;transform:rotate(11deg);color:#bc8b4e}.art-times{position:absolute;left:82px;top:83px;color:#839c73;font-size:27px}.art-star{position:absolute;color:#bba66a;font-size:24px}.s1{right:45px;top:42px;transform:rotate(15deg)}.s2{left:3px;bottom:40px;font-size:28px}.art-result{position:absolute;top:164px;left:10px;transform:rotate(-7deg);font:italic 35px Georgia;color:#6b8a59}.art-result span{display:block;font:10px "Microsoft YaHei",sans-serif;letter-spacing:1px;margin-top:13px}.art-grid{position:absolute;right:35px;bottom:35px;width:130px;display:grid;grid-template-columns:repeat(3,1fr);padding:10px;gap:3px;background:#fffaf0;border-radius:14px;border:1px solid #e2dfcb;box-shadow:0 6px 0 #d9dec9;transform:rotate(8deg)}.art-grid span{aspect-ratio:1;display:grid;place-items:center;background:#f2efdf;border-radius:3px;font:18px Georgia;color:#758365}.art-grid span.center{background:#d4e2c8;color:#4d744c}.art-pencil{position:absolute;right:12px;top:122px;width:12px;height:113px;background:linear-gradient(90deg,#c1a25a 30%,#dec37d 30%,#dec37d 70%,#b29651 70%);border-radius:3px;transform:rotate(33deg)}.art-pencil:after{content:"";position:absolute;bottom:-17px;left:0;border-top:18px solid #d4b78a;border-left:6px solid transparent;border-right:6px solid transparent}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0 32px}.metrics>div{border:1px solid var(--border);border-radius:14px;background:white;padding:18px;display:flex;gap:14px;align-items:center;position:relative;min-width:0}.metric-icon{display:grid;place-items:center;border-radius:11px;width:43px;height:43px;flex-shrink:0}.green{background:#edf4ea;color:#749565}.amber{background:#fbf2e5;color:#c5a16d}.blue{background:#edf2f4;color:#849eae}.metrics strong{font-size:24px;font-family:system-ui,sans-serif;font-weight:600}.metrics strong small{font-size:11px;color:#9aa396;font-weight:400}.metrics p{font-size:10px;margin:4px 0 0;color:#929e91}.mini-progress{position:absolute;width:31px;height:31px;right:15px;border-radius:50%;background:conic-gradient(#759d72 var(--progress),#edf2e8 0);mask:radial-gradient(transparent 55%,black 58%)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 17px}.section-heading h2{margin:0;font-size:18px}.text-button{display:inline-flex;align-items:center;gap:7px;background:none;border:0;padding:7px 0;color:#758574;font-size:11px;min-height:36px}.text-button .icon{width:15px;height:15px}.challenge-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}.challenge-card{border-radius:18px;padding:25px 28px;border:1px solid #ede6d9;position:relative;overflow:hidden}.points-card{background:#fbf5eb}.magic-card{background:#edf2f5;border-color:#e0e7e9}.challenge-top{display:flex;justify-content:space-between;align-items:center}.subject-icon{width:46px;height:46px;background:#f5e7cf;color:#a9854e;border-radius:13px;display:grid;place-items:center;font:700 25px Georgia}.magic-card .subject-icon{background:#dce8ed;color:#7894a0}.subject-icon .icon{width:27px;height:27px}.tag{font-size:10px;background:#e9f1e7;border:1px solid #dde8d8;border-radius:6px;padding:5px 8px;color:#789371}.challenge-card .tag{background:transparent;border-color:#e9dfcc;color:#a7987a}.magic-card .tag{border-color:#d8e3e6;color:#95a7ab}.challenge-card h3{font-size:22px;margin:20px 0 8px;letter-spacing:.5px}.challenge-card p{font-size:12px;margin-bottom:25px;color:#929580}.magic-card p{color:#899da3}.challenge-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px}.challenge-bottom>span{font-size:11px;color:#8b8f76}.challenge-bottom small{display:block;font-size:10px;margin-top:7px;color:#aaa996}.magic-card .challenge-bottom span{color:#899ba1}.round-button{width:36px;height:36px;display:grid;place-items:center;border:1px solid #dfd7bd;background:#fffaf0;color:#a18c5d;border-radius:50%}.round-button .icon{width:17px;height:17px}.magic-card .round-button{border-color:#cbd9df;background:#f4f9fa;color:#7e9ca7}.tip-strip{display:flex;gap:15px;align-items:center;margin-top:25px;padding:21px 24px;background:#f2f4e9;border:1px solid #e7eadb;border-radius:14px}.tip-icon{color:#aab071}.tip-strip h3{font-size:12px;margin:0 0 5px;color:#7a8a63}.tip-strip p{font-size:11px;color:#99a18a;margin:0}.tip-strip .text-button{margin-left:auto;white-space:nowrap}.mobile-nav,.mobile-only{display:none}footer{max-width:1232px;padding:0 44px 25px;margin:auto;display:flex;justify-content:space-between;color:#b3bbac;font-size:10px}.storage-warning,.correction{background:#fff4da;border:1px solid #eed7a7;padding:12px 15px;font-size:12px;line-height:1.7;border-radius:10px;margin-bottom:20px}.practice-heading{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:12px}.practice-heading b{color:var(--green);margin-left:10px}.progress-track{height:5px;background:#e8ede4;border-radius:6px;overflow:hidden}.progress-track>span{display:block;height:100%;background:#7ca486;border-radius:6px}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;margin-top:24px;align-items:start}.question-panel,.help-panel{background:#fff;border:1px solid var(--border);border-radius:18px;padding:28px}.question-eyebrow{display:flex;gap:10px;align-items:center;font-size:11px;color:#9aa58f;margin-bottom:21px}.tag-orange{color:#b48b57;background:#fbf2e3;border-color:#efe1c8}.question-panel h1{font-size:22px;line-height:1.7}.rules{font-size:12px;margin-bottom:27px}.number-cards{display:flex;gap:13px;justify-content:center;margin:30px 0}.number-card{border:1px solid #e4dbc4;border-radius:12px;background:#fffaf0;box-shadow:0 4px 0 #e8dfc9;min-width:62px;width:75px;height:95px;font:600 35px Georgia;color:#9d7b43}.number-card small{display:block;font:9px "Microsoft YaHei";color:#b5ab91;margin-top:8px}.number-card.used{background:#f1f3ed;color:#c2cab9;box-shadow:none;border-color:#e7ebdf;opacity:1}.formula-box{border:1px solid #e2e8dd;border-radius:12px;background:#fbfcf8;padding:16px 18px}.formula-caption{font-size:10px;color:#9ba58f;letter-spacing:1px}.formula{font:25px system-ui;line-height:1.8;min-height:48px;overflow-wrap:anywhere;margin-top:5px}.placeholder{font:12px "Microsoft YaHei";color:#b0b8a7}.formula-goal{font-size:20px;color:#a5b298;margin-left:14px;white-space:nowrap}.operator-keys{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;margin-top:12px}.operator-keys button{border:1px solid #e4e9df;border-radius:8px;background:#fff;min-height:46px;font-size:23px;color:#758970;padding:0}.operator-keys .clear-key{font-size:11px}.feedback{margin:21px 0 0;display:flex;align-items:flex-start;gap:10px}.feedback:empty{margin:0}.feedback.success,.feedback.error{padding:13px;border-radius:10px;background:#edf5e9;color:#527c4f}.feedback.error{background:#fcf2e5;color:#ac8752}.feedback strong{font-size:12px}.feedback p{font-size:11px;margin:5px 0 0;color:inherit}.feedback .icon{width:17px;height:17px;margin-top:2px}.question-actions{display:flex;gap:12px;margin-top:25px}.source-details{margin-top:25px;border-top:1px solid #edf0e8;padding-top:15px;font-size:10px;color:#9aa48e}.source-details summary{cursor:pointer}.source-details p{font-size:10px;margin:9px 0 0;overflow-wrap:anywhere}.help-panel{background:#f5f7ef;padding:23px}.help-title{display:flex;align-items:center;gap:8px;color:#70875a}.help-title h2{font-size:16px;margin:0}.help-title .icon{width:21px;height:21px}.help-panel>p{font-size:11px;color:#9aa48b;margin:15px 0 23px}.help-button{border:1px solid #e3e9d9;background:#fffef9;border-radius:10px;display:flex;align-items:center;gap:10px;text-align:left;width:100%;padding:13px 10px;margin-top:10px;min-height:65px}.help-no{width:24px;height:24px;background:#eef3e7;border-radius:50%;display:grid;place-items:center;font:12px Georgia;color:#809466;flex-shrink:0}.help-button b{display:block;font-size:12px;font-weight:500;color:#768563}.help-button small{display:block;font-size:9px;color:#a9b29c;margin-top:5px}.help-button>.icon{width:13px;height:13px;color:#a4b393;margin-left:auto}.help-note{display:flex;gap:7px;align-items:center;color:#a4b18f;border-top:1px dashed #dce4d1;margin-top:23px;padding-top:15px;font-size:10px;line-height:1.8}.help-note .icon{width:14px;height:14px}.hint-content{font-size:12px;line-height:1.9;color:#738661;padding:14px 2px 4px}.explanation-steps{padding-left:23px;color:#6b7e60;font-size:12px;line-height:1.9}.explanation-steps li{margin:13px 0}.full-answer{padding-top:20px;font-size:12px;line-height:1.9}.full-answer>strong{font-size:11px;color:#8d9b7e}.full-answer p{font-size:11px}.answer-formula{font:16px system-ui;margin:14px 0;overflow-wrap:anywhere;color:var(--green)}.magic-input-wrap{max-width:280px;margin:30px auto 12px}.magic-input-grid,.magic-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid #d3dfce;border-radius:10px;overflow:hidden;gap:1px;background:#d3dfce}.magic-input-grid>input,.magic-input-grid>div,.magic-grid>span{border:0;border-radius:0;background:#fff;aspect-ratio:1;width:100%;min-width:0;text-align:center;display:grid;place-items:center;font:600 29px system-ui;color:#52754b;padding:0}.magic-input-grid>input:focus{outline:3px solid #bdc899;outline-offset:-4px;background:#fffdf2}.magic-input-grid .fixed{background:#edf2e7;color:#8a987a}.magic-input-grid .fixed.center{background:#e4edda;color:#759260}.magic-input-grid input.bad,.magic-grid .bad{background:#fff0df;color:#bb8854}.grid-legend{display:flex;justify-content:center;gap:20px;margin-top:13px;color:#a2ad96;font-size:10px}.grid-legend span{display:flex;gap:5px;align-items:center}.grid-legend i{background:#edf2e7;width:9px;height:9px;border:1px solid #d3dfce;border-radius:2px}.grid-legend span:last-child i{background:#fff}.mini-grid{width:118px;border-radius:7px;margin:12px auto}.mini-grid>span{font-size:15px;aspect-ratio:1;background:#fffdfa;font-weight:500}.mini-grid .grid-center{background:#edf3e5}.number-list{font-size:12px;line-height:1.9;background:#f7f9f1;padding:11px 14px;color:#85956f;border-radius:9px;margin-bottom:15px}.filter-panel,.white-panel{background:#fff;border:1px solid var(--border);padding:25px;border-radius:17px;margin-bottom:25px}.segmented{display:inline-flex;background:#f1f4ed;border-radius:10px;padding:4px;gap:4px}.segmented button{border:0;background:transparent;border-radius:7px;padding:10px 22px;color:#8b9b80;font-size:12px}.segmented button.active{background:#fff;color:var(--green);box-shadow:0 2px 5px #244b2410}.filter-selects{display:flex;align-items:flex-end;gap:15px;margin-top:22px}.filter-selects label,.goal-form label{display:flex;flex-direction:column;gap:8px;font-size:11px;color:#89997e}.filter-selects select,.goal-form input{border:1px solid #dfe6d9;border-radius:8px;padding:10px;background:#fff;color:#73866a;font-size:12px;height:42px;min-width:110px}.filter-selects>.btn{margin-left:auto;font-size:11px;height:42px;min-height:42px}.count-label{font:12px system-ui;color:#879b7a;background:#eaf0e3;border-radius:20px;padding:4px 8px;margin-left:5px;vertical-align:middle}.question-list{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.question-tile{background:white;border:1px solid var(--border);border-radius:13px;padding:17px;text-align:left;transition:transform .15s,border-color .15s}.question-tile:hover{transform:translateY(-3px);border-color:#b4c6a6}.tile-meta{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#96a48a}.tile-meta .icon{width:14px;height:14px}.tile-numbers{display:flex;gap:8px;margin:25px 0}.tile-numbers span{width:40px;height:44px;background:#f8f5e9;border-radius:6px;display:grid;place-items:center;font:22px Georgia;color:#a59470}.tile-footer{display:flex;justify-content:space-between;font-size:10px;color:#a3ad99}.tile-footer>span{color:#8dA17a}.pagination{display:flex;justify-content:center;align-items:center;gap:20px;margin:25px;font-size:12px;color:#91a082}.pagination .btn{padding:9px 17px;min-height:38px;font-size:11px}.review-banner{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#eaf1e4;border:1px solid #dfe8d5;padding:23px 26px;border-radius:16px;margin-bottom:30px}.review-banner>div{display:flex;gap:18px;align-items:center}.review-banner>div>.icon{width:32px;height:32px;color:#86a076}.review-banner h2{font-size:17px;margin:0 0 5px}.review-banner p{font-size:11px;margin:0;color:#93a184}.review-list{border:1px solid var(--border);background:#fff;border-radius:15px;overflow:hidden}.review-row{width:100%;background:none;border:0;border-bottom:1px solid #edf0e7;display:flex;align-items:center;gap:16px;padding:19px 22px;text-align:left}.review-row:last-child{border-bottom:0}.review-row:hover{background:#fafcf7}.review-subject{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:#f5f1e4;color:#aa9970;font:21px Georgia;flex-shrink:0}.review-row strong{font-size:13px;font-weight:500}.review-row small{display:block;font-size:10px;color:#a0ac93;margin-top:6px}.review-date{margin-left:auto;text-align:right;font-size:11px;color:#8aA072;white-space:nowrap}.review-row>.icon{width:15px;color:#a7b19a}.empty-state{text-align:center;padding:65px 20px;background:#fff;border:1px dashed #dfe5d6;border-radius:16px}.empty-state>.icon{width:48px;height:48px;color:#c0cdb1;margin-bottom:20px}.empty-state h3{font-size:18px}.empty-state p{font-size:12px}.summary-panel{text-align:center;background:#fff;border:1px solid var(--border);border-radius:20px;padding:55px 25px}.summary-star{width:75px;height:75px;border-radius:50%;display:grid;place-items:center;background:#faf3df;margin:0 auto 25px;color:#b9a26a}.summary-star .icon{width:40px;height:40px}.summary-panel h1{font-size:27px}.summary-panel>p{font-size:13px}.summary-numbers{display:flex;justify-content:center;gap:60px;margin:35px 0}.summary-numbers strong{display:block;font:36px system-ui;color:#6d8b5b}.summary-numbers span{font-size:11px;color:#a2af95;display:block;margin-top:9px}.summary-panel .btn{margin:5px}.stats-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:25px}.stats-cards>div{padding:23px;background:white;border:1px solid var(--border);border-radius:14px}.stats-cards span{font-size:11px;color:#92a184}.stats-cards strong{display:block;font:32px system-ui;margin-top:13px;color:#608052}.stats-cards small{font-size:11px;margin-left:6px;color:#a7b297}.activity-chart{display:flex;align-items:flex-end;gap:10px;height:190px;margin-top:30px}.activity-day{flex:1;min-width:0;text-align:center}.bar-count{font-size:9px;display:block;height:16px;color:#81966e}.bar-track{height:140px;display:flex;align-items:flex-end;justify-content:center}.bar{width:70%;max-width:32px;background:#dfE8d4;border-radius:5px 5px 2px 2px}.bar.today{background:#73996e}.activity-day small{font:9px system-ui;color:#a4b095;display:block;margin-top:10px}.subject-progress{margin:27px 0}.subject-progress>div:first-child{display:flex;justify-content:space-between;font-size:12px;margin-bottom:12px}.subject-progress strong{font-weight:500}.subject-progress span{color:#99a78c;font-size:11px}.lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.lesson{background:#fff;border:1px solid var(--border);border-radius:17px;padding:27px}.lesson-number{font:11px system-ui;color:#a1ad90;letter-spacing:1px}.lesson h2{font-size:21px;margin:18px 0}.lesson p{font-size:12px}.math-display{font:22px system-ui;color:#8fa16a;line-height:1.8;margin:22px 0;overflow-wrap:anywhere}.math-display span{color:#b8c2a4;font-size:16px}.math-display small{font-size:15px;color:#a0ae86}.lesson-example{padding:16px 18px;border-left:2px solid #d5dfc5;background:#f8faf2;margin:20px 0}.lesson-example b{font-size:12px;font-weight:500;color:#81966b}.lesson-example p{margin:10px 0 0}.lesson-magic{display:flex;align-items:center;gap:25px}.lesson-magic .mini-grid{margin:0;width:106px;flex-shrink:0}.lesson-magic .math-display{font-size:18px}.goal-form{display:flex;gap:20px;align-items:flex-end;margin-top:24px}.goal-form input{width:110px}.white-panel>p{font-size:12px}.backup-actions{display:flex;gap:12px;margin-top:20px}.file-label{cursor:pointer}.file-label input{display:none}.import-confirm{padding-top:20px}.import-confirm .btn{margin-right:10px}.loading{display:grid;place-items:center;min-height:100dvh;font-size:18px;color:var(--green)}#toast{position:fixed;left:50%;bottom:35px;transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:100;max-width:90vw;background:#314f41;color:#fff;padding:12px 20px;border-radius:10px;font-size:12px;transition:all .2s;line-height:1.8;box-shadow:0 5px 20px #0002}#toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:1500px){.hero{min-height:340px}.hero-copy{padding:34px 40px}.hero h2{font-size:36px}.hero-art{right:30px;width:39%}.art-grid{width:150px}.floating-card{width:80px;height:98px}.card-six{left:140px}.art-times{left:100px}}
@media(max-width:1150px){.sidebar{width:205px;padding:30px 14px}.brand{font-size:18px;gap:9px}.brand small{font-size:9px}.main-wrap{margin-left:205px}.topbar{padding:0 28px}#main{padding:30px 28px}.date-label{display:none}.hero-copy{padding:26px;width:65%}.hero h2{font-size:29px}.hero-art{right:-20px;width:38%}.card-four{left:-10px;width:58px;height:75px}.card-six{left:75px;width:58px;height:75px}.art-times{left:52px;top:77px}.art-grid{width:105px;right:27px}.art-result{left:-18px;font-size:28px}.art-pencil{right:17px}.hero-duration{display:block;margin:12px 0 0}.metrics{gap:10px}.metrics>div{padding:13px;gap:9px}.metric-icon{width:33px;height:36px}.metric-icon .icon{width:18px}.mini-progress{display:none}.metrics p{font-size:9px}.metrics strong{font-size:22px}.challenge-card{padding:22px}.practice-layout{grid-template-columns:minmax(0,1fr) 260px;gap:17px}.question-panel,.help-panel{padding:21px}.question-panel h1{font-size:19px}.number-cards{gap:9px}.number-card{min-width:45px;width:60px;height:80px}.operator-keys{grid-template-columns:repeat(4,1fr)}.stats-cards{gap:12px}.stats-cards>div{padding:18px}.filter-selects{flex-wrap:wrap}.filter-selects>.btn{margin-left:0}.question-list{grid-template-columns:repeat(2,1fr)}}
@media(max-width:850px){.sidebar{width:180px;padding:26px 10px}.brand{font-size:15px;gap:7px}.brand-mark{width:32px;height:32px}.brand small{font-size:8px;letter-spacing:0}.sidebar-note{padding:15px 9px;margin-left:3px;margin-right:3px}.sidebar-note p{font-size:10px}.nav-item{font-size:12px;padding:13px 12px}.settings{font-size:10px;padding:12px 7px}.main-wrap{margin-left:180px}.hero-copy{width:100%}.hero-art{opacity:.35;right:-60px;pointer-events:none}.hero h2{font-size:30px}.hero-copy>p{max-width:70%}.metrics strong small{font-size:9px}.metrics>div{padding:11px;gap:8px}.metrics .metric-icon{display:none}.challenge-cards{gap:15px}.challenge-card{padding:18px}.challenge-card .tag{font-size:8px;padding:4px}.challenge-card h3{font-size:19px}.challenge-card p{font-size:11px}.challenge-bottom>span{font-size:9px}.challenge-bottom small{font-size:8px}.tip-strip{padding:16px;align-items:flex-start}.tip-strip .text-button{display:none}.practice-layout{grid-template-columns:1fr}.help-panel{padding:24px}.help-panel>p br{display:none}.operator-keys{grid-template-columns:repeat(8,1fr)}.lesson-grid{grid-template-columns:1fr}.stats-cards{grid-template-columns:repeat(2,1fr)}.review-banner{flex-direction:column;align-items:flex-start}.top-status{font-size:9px}.page-heading h1{font-size:24px}.heading-spark{font-size:25px}.question-panel h1{font-size:22px}}
@media(max-width:640px){.sidebar{position:static;width:100%;height:74px;flex-direction:row;align-items:center;padding:17px 21px;border-right:0;border-bottom:1px solid var(--border);background:#fff}.sidebar .sidebar-label,.sidebar>nav,.sidebar-note{display:none}.sidebar .settings{width:auto;margin-left:auto;min-height:36px;padding:6px}.sidebar .settings span{display:none}.sidebar .settings .icon{width:22px;height:22px}.brand{font-size:19px}.brand-mark{width:36px;height:36px}.brand small{font-size:9px;letter-spacing:1px;margin-top:4px}.main-wrap{margin:0}.topbar{display:none}#main{padding:24px 20px 20px}.page-heading{margin-bottom:22px}.page-heading h1{font-size:23px;letter-spacing:0}.page-heading p{font-size:11px}.eyebrow{font-size:10px;letter-spacing:1.5px}.heading-spark{font-size:24px;margin-left:7px}.hero{min-height:315px;border-radius:18px}.hero-copy{padding:24px;width:100%}.hero h2{font-size:29px;letter-spacing:1px;line-height:1.6;margin-top:17px}.hero p{font-size:11px;max-width:82%;line-height:1.9}.hero-art{opacity:.7;right:-75px;top:0;width:54%}.hero-art .floating-card{top:40px;left:0;opacity:.6;width:50px;height:66px;font-size:30px}.hero-art .card-six{left:68px;top:24px}.art-times{left:46px;top:50px}.art-result{top:148px;left:4px;font-size:25px;opacity:.4}.art-result span{display:none}.art-grid{right:48px;bottom:26px;width:99px;transform:rotate(8deg);padding:7px}.art-grid span{font-size:13px}.art-pencil,.art-orbit{display:none}.art-star.s1{right:53px;top:112px;font-size:19px}.art-star.s2{left:-8px;bottom:60px;font-size:18px}.hero .btn{font-size:12px;padding:11px 17px}.hero-duration{display:block;margin:12px 0 0;font-size:9px}.metrics{gap:8px;margin:16px 0 28px}.metrics>div{padding:13px 10px;border-radius:10px;display:block}.metrics strong{font-size:25px}.metrics strong small{font-size:9px}.metrics p{font-size:9px;white-space:nowrap;margin-top:7px}.section-heading h2{font-size:17px}.section-heading .text-button{font-size:10px}.challenge-cards{grid-template-columns:1fr;gap:15px}.challenge-card{padding:22px;min-height:220px}.challenge-top{justify-content:flex-start;gap:13px}.challenge-card .tag{font-size:10px;padding:5px 7px}.challenge-card h3{font-size:22px;margin-top:18px}.challenge-card p{font-size:12px;line-height:1.8;margin-bottom:21px}.challenge-bottom>span{font-size:11px}.challenge-bottom small{display:inline;font-size:9px;margin-left:9px}.round-button{position:absolute;right:23px;bottom:24px}.tip-strip{margin-top:18px;gap:12px;padding:17px}.tip-strip h3{font-size:12px}.tip-strip p{font-size:10px}.tip-icon .icon{width:22px}footer{font-size:9px;padding:0 20px 100px}footer>span{display:none}.mobile-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;background:#fffffff5;backdrop-filter:blur(14px);border-top:1px solid var(--border);padding:9px 9px calc(10px + env(safe-area-inset-bottom));z-index:20;box-shadow:0 -4px 20px #00000003}.mobile-nav button{display:flex;flex-direction:column;align-items:center;gap:5px;border:0;background:none;color:#a3ae9c;font-size:9px;padding:3px 0}.mobile-nav button.active{color:var(--green)}.mobile-nav .icon{width:21px;height:21px}#toast{bottom:90px;white-space:normal;width:max-content;max-width:90vw;font-size:11px}.practice-heading{font-size:10px;margin-bottom:10px}.practice-heading .text-button{font-size:10px}.practice-layout{margin-top:18px;gap:18px}.question-panel{padding:22px 18px}.question-panel h1{font-size:20px}.rules{font-size:11px;margin-bottom:22px}.number-card{width:65px;height:84px;min-width:50px;font-size:32px}.number-cards{margin:27px 0;gap:11px}.formula-box{padding:13px}.formula{font-size:23px;min-height:48px}.placeholder{font-size:10px}.formula-goal{font-size:18px}.operator-keys{grid-template-columns:repeat(4,1fr);gap:8px}.operator-keys button{min-height:46px}.question-actions{gap:10px}.question-actions .btn{flex:1;padding:12px 10px;font-size:12px}.source-details p{font-size:9px}.help-panel{padding:23px}.help-button{padding:15px;min-height:70px}.help-button b{font-size:13px}.help-button small{font-size:10px}.help-no{width:27px;height:27px}.help-panel>p{font-size:12px}.hint-content{font-size:13px}.explanation-steps{font-size:13px}.explanation-steps .mini-grid{width:140px}.full-answer p{font-size:12px}.magic-input-wrap{max-width:255px}.magic-input-grid>input,.magic-input-grid>div{font-size:30px}.filter-panel{padding:18px}.filter-selects{gap:10px}.filter-selects label{flex:1;min-width:100px}.filter-selects select{min-width:0;width:100%;font-size:11px;padding:9px}.filter-selects>.btn{width:100%;margin-top:5px}.segmented{display:flex}.segmented button{flex:1;padding:10px 12px}.question-list{gap:11px}.question-tile{padding:13px;min-width:0}.tile-numbers{gap:5px;margin:20px 0}.tile-numbers span{width:29px;height:35px;font-size:20px}.tile-meta{font-size:9px}.tile-footer{font-size:8px}.section-heading>.muted{font-size:9px;max-width:45%;text-align:right}.question-tile .mini-grid{width:100px}.pagination{margin:23px 0;gap:15px}.review-banner{padding:20px}.review-banner h2{font-size:16px}.review-banner>div{gap:12px}.review-banner>div>.icon{width:25px}.review-banner p{font-size:10px}.review-banner>.btn{width:100%}.review-row{padding:15px 12px;gap:10px}.review-subject{width:34px;height:36px;font-size:18px}.review-row strong{font-size:11px}.review-row small{font-size:9px}.review-row>.icon{display:none}.review-date{font-size:9px}.stats-cards{gap:12px}.stats-cards>div{padding:20px}.stats-cards span{font-size:11px}.white-panel{padding:20px}.white-panel h2{font-size:17px}.activity-chart{gap:5px;margin-top:20px}.activity-day small{font-size:7px}.bar-count{font-size:8px}.subject-progress>div:first-child{font-size:11px}.subject-progress span{font-size:9px}.lesson{padding:23px}.lesson h2{font-size:21px}.math-display{font-size:20px}.lesson p{font-size:13px}.lesson-magic{gap:18px}.lesson-magic .math-display{font-size:17px}.goal-form{gap:12px;flex-wrap:wrap}.goal-form label{flex:1}.goal-form input{width:100%}.goal-form>.btn{width:100%}.backup-actions{flex-wrap:wrap}.backup-actions>.btn{flex:1;font-size:12px;padding:12px}.summary-panel{padding:40px 18px}.summary-panel h1{font-size:23px}.summary-numbers{gap:25px}.summary-numbers span{font-size:10px}.summary-numbers strong{font-size:32px}.summary-panel>.btn{font-size:12px;padding:11px 15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.resume-strip{display:flex;justify-content:space-between;align-items:center;gap:15px;background:#fff9e9;border:1px solid #e9dfc5;border-radius:10px;padding:8px 16px;margin:0 0 20px;font-size:11px;color:#998660}.resume-strip .text-button{color:#927b49;white-space:nowrap}
@media(max-width:640px){.resume-strip{padding:10px 13px;flex-wrap:wrap;gap:0;font-size:10px}.resume-strip .text-button{font-size:10px}}
.entrance-page{min-height:100dvh;display:grid;place-items:center;padding:32px 20px;background:radial-gradient(ellipse at 12% 10%,#e7efdf 0,transparent 50%),radial-gradient(ellipse at 90% 90%,#f7ecd6 0,transparent 46%),#f7f8f3}
.entrance-card{width:100%;max-width:430px;border:1px solid #e2e8da;border-radius:25px;background:#fffefa;padding:32px 38px 24px;box-shadow:0 18px 60px #405d2410;text-align:center}
.entrance-brand{display:flex;gap:10px;align-items:center;justify-content:center;text-align:left;font-size:20px;font-weight:700;letter-spacing:1px}.entrance-brand img{border-radius:12px}.entrance-brand small{font-weight:400;display:block;font-size:10px;color:#92a084;letter-spacing:2px;margin-top:5px}
.entrance-illustration{height:145px;position:relative;display:flex;align-items:center;justify-content:center;margin:8px 0 4px}.entrance-number{width:90px;height:104px;display:grid;place-items:center;background:#e9f1e2;border:1px solid #d9e5ce;border-radius:16px;box-shadow:0 6px 0 #d4dfc6;color:#62824f;font:48px Georgia;transform:rotate(-9deg)}.entrance-pencil{position:absolute;bottom:15px;right:62px;background:#fbf0d9;border:1px solid #e9ddbd;padding:9px 13px;border-radius:8px;font:20px Georgia;letter-spacing:4px;color:#b39963;transform:rotate(10deg)}.entrance-spark{position:absolute;left:60px;top:30px;font-size:35px;color:#b5c49d}.entrance-spark.second{left:auto;right:60px;top:20px;font-size:23px;color:#d2bc85}
.entrance-card .eyebrow{font-size:10px;margin:5px 0 13px;letter-spacing:1px}.entrance-card h1{font-size:24px;margin-bottom:12px}.entrance-description{font-size:12px;color:#8d9a81;margin-bottom:25px}.entrance-card form{text-align:left}.entrance-card label{display:block;font-size:11px;color:#849577;margin-bottom:9px}.entrance-card input{display:block;width:100%;height:54px;border:1px solid #dae3cf;border-radius:10px;background:#fbfcf6;padding:12px 17px;font:23px system-ui;letter-spacing:7px;color:#53754a;text-align:center}.entrance-card input::placeholder{font:12px "Microsoft YaHei",sans-serif;letter-spacing:1px;color:#b0bba3}.entrance-card input[aria-invalid=true]{border-color:#c49a72;background:#fff8f0}.entrance-error{min-height:23px;margin:6px 0 10px;font-size:11px;color:#b17f52;line-height:1.8}.entrance-submit{width:100%;height:49px;font-size:14px;justify-content:space-between;padding:12px 21px}.entrance-submit span{font:22px system-ui}.entrance-note{font-size:10px;color:#a8b197;margin:23px 0 0;letter-spacing:1px}
@media(max-width:480px){.entrance-page{padding:25px 22px}.entrance-card{padding:28px 26px 23px;border-radius:21px}.entrance-card h1{font-size:22px}.entrance-pencil{right:25px}.entrance-spark{left:25px}.entrance-spark.second{right:30px}.entrance-illustration{height:133px}.entrance-description{margin-bottom:23px}}
.entrance-switch{display:flex;margin:15px auto 0;color:#748a65;font-size:12px}.account-strip{display:flex;justify-content:space-between;align-items:center;margin:0 0 23px;padding:12px 17px;background:#edf2e6;border:1px solid #dfe7d5;border-radius:11px}.account-strip>span{display:flex;gap:14px;align-items:center}.account-strip b{font-size:13px;font-weight:600}.account-strip small{font-size:10px;color:#889c77}.account-strip .text-button{padding:3px 0;font-size:11px;min-height:30px}
.admin-layout{max-width:1120px;margin:auto;padding:30px 35px 60px}.admin-header{display:flex;justify-content:space-between;align-items:center;padding:0 0 25px;margin-bottom:30px;border-bottom:1px solid var(--border)}.admin-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:25px}.admin-summary>div{background:#edf2e7;border:1px solid #dfe8d4;border-radius:14px;padding:22px}.admin-summary b{display:block;font:30px system-ui;color:#608052}.admin-summary span{display:block;font-size:12px;color:#91a17f;margin-top:7px}.admin-form{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap}.admin-form label,.child-edit label{display:flex;flex-direction:column;gap:8px;font-size:12px;color:#80936c;flex:1;min-width:150px}.admin-form input,.child-edit input{width:100%;min-height:44px;border:1px solid #dce5d2;border-radius:8px;padding:10px 13px;font-size:14px;color:#536f46;background:#fdfefb}.admin-children{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.child-card{border:1px solid #e1e8da;border-radius:15px;padding:23px;background:#fcfdf8;min-width:0}.child-card-top{display:flex;gap:12px;align-items:center}.child-card h3{font-size:18px;margin:0 0 7px}.child-avatar{width:45px;height:45px;background:#e2ecd8;color:#738e5d;border-radius:13px;display:grid;place-items:center;font-size:22px;flex-shrink:0}.child-status{font-size:10px;color:#658b52}.child-status.disabled{color:#b39374}.child-stats{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 12px;font-size:11px;color:#8d9c7e}.child-stats b{color:#63804e;font-size:15px}.child-last{font-size:10px;color:#a0ac91}.child-buttons{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.child-buttons .btn{padding:10px 13px;font-size:11px;min-height:38px}.danger-text{color:#b18a65}.child-edit{border-top:1px dashed #dce5d0;margin-top:15px;padding-top:17px;display:flex;gap:12px;flex-direction:column}.child-edit p{font-size:10px;margin:0;color:#a1ad91}.child-edit .btn{align-self:flex-start}.admin-notice{color:#9d7949;background:#fff6df;border-radius:9px;font-size:12px;line-height:1.8;margin-bottom:23px;padding:12px 17px}.admin-notice:empty{display:none}.admin-progress-list>div{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #e9eee2;padding:16px 0;font-size:12px}.admin-progress-list b{font-weight:500}.admin-progress-list small{display:block;font-size:10px;color:#9eac8c;margin-top:7px}.admin-progress-list>div>span:last-child{text-align:right;white-space:nowrap}
@media(max-width:640px){.account-strip{padding:10px 12px;margin-bottom:20px}.account-strip>span{gap:3px;flex-direction:column;align-items:flex-start}.account-strip small{font-size:9px}.admin-layout{padding:23px 18px 40px}.admin-header{gap:10px}.admin-header .entrance-brand{font-size:17px}.admin-header .btn{font-size:10px;padding:9px 12px}.admin-summary{gap:10px}.admin-summary>div{padding:17px 12px}.admin-summary b{font-size:26px}.admin-summary span{font-size:9px}.admin-form label{min-width:100%;flex:auto}.admin-form>.btn{flex:1;font-size:12px;padding:10px 12px}.admin-children{grid-template-columns:1fr}.child-card{padding:20px}.admin-layout .page-heading h1{font-size:23px}.admin-progress-list>div{font-size:11px}.admin-progress-list small{font-size:9px}}