@font-face{font-family:LabSerif;src:local('Georgia')}*{box-sizing:border-box} :root{--bg:#f7f8f4;--paper:#fff;--ink:#233b34;--muted:#7b8780;--green:#225c4b;--light:#eef3ec;--line:#e6eae3;--orange:#c48f56;--shadow:0 8px 26px #233b3405}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,'Segoe UI','Microsoft YaHei',sans-serif;font-size:14px;line-height:1.65}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #95bb8d;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:30px;line-height:1.35;letter-spacing:-1px;font-weight:600}h2{font-size:20px;line-height:1.4;font-weight:600}h3{font-size:16px;font-weight:600}small{font-size:11px}.shell{display:flex;min-height:100vh}.sidebar{position:fixed;width:226px;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--line);padding:31px 20px 22px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;padding:0 10px;font-size:18px;font-weight:650;letter-spacing:1px}.brand small{display:block;color:var(--muted);font-size:8px;letter-spacing:2.6px;font-weight:500;margin-top:2px}.brand-icon{font-family:Georgia,serif;background:var(--green);color:white;border-radius:12px;font-size:31px;width:43px;height:45px;text-align:center;line-height:45px}.nav-caption{margin:51px 14px 13px;font-size:10px;letter-spacing:1.3px;color:#98a199}.sidebar nav{display:grid;gap:6px}.sidebar nav a{padding:12px 14px;border-radius:8px;display:flex;align-items:center;gap:12px;color:#718078;font-size:13px;position:relative}.sidebar nav a.active{background:#eaf1e8;color:var(--green);font-weight:600}.nav-icon{font-size:20px;width:22px;text-align:center;line-height:1}.nav-count{margin-left:auto;background:#d6e5d0;color:var(--green);border-radius:6px;font-size:10px;padding:1px 6px;min-width:20px;text-align:center}.nav-count:empty{display:none}.sidebar-note{padding:19px 17px;margin-top:auto;background:#f7f8f3;border:1px solid #f0f1e9;border-radius:10px}.tiny-label{color:#9aab92;letter-spacing:1px;font-size:10px}.sidebar-note p{font-size:13px;line-height:1.9;margin:12px 0 16px}.sidebar-note small{color:#99a18e;font-size:9px;letter-spacing:1px}.note-line{height:1px;background:#e5e9dc;margin-bottom:13px;width:30px}.profile{display:flex;gap:9px;align-items:center;padding:24px 5px 0;margin-top:20px;border-top:1px solid var(--line);font-size:11px}.profile small{display:block;font-size:8px;color:#9ca69d;margin-top:2px}.avatar{display:grid;place-items:center;width:33px;height:33px;border-radius:50%;background:#f0eadd;color:#8d7751}.online-dot{height:6px;width:6px;background:#94b985;border-radius:50%;margin-left:auto}.workspace{margin-left:226px;width:calc(100% - 226px)}.topbar{height:81px;padding:0 42px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:#ffffff70}.breadcrumb{font-size:11px;color:#97a298}.breadcrumb span{padding:0 13px;color:#bec6bb}.breadcrumb b{font-weight:500;color:#53665a}.top-actions{display:flex;gap:22px;align-items:center;font-size:10px;color:#859084}.btn{border:1px solid transparent;border-radius:7px;min-height:40px;padding:9px 19px;display:inline-flex;gap:9px;align-items:center;justify-content:center;font-weight:550;transition:background .15s,transform .15s;font-size:12px}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--green);color:white}.btn-primary:hover{background:#174838}.btn-light{background:#fff;border-color:#dce4d9;color:#42634e}.btn-ghost{background:transparent;color:#75846f;padding:6px 0;min-height:30px}.btn-small{min-height:33px;padding:6px 12px;font-size:11px}.btn-danger{background:#fff1ed;color:#a35643;border-color:#efdbd3}.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.icon-btn{border:0;background:none;font-size:24px;color:var(--muted);line-height:1;padding:6px}.eyebrow{display:block;font-size:9px;letter-spacing:2.4px;color:#86987b;font-weight:600;margin-bottom:11px}main{max-width:1260px;margin:auto;padding:33px 42px 20px;min-height:calc(100vh - 143px)}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:26px}.page-heading h1{margin-bottom:7px}.page-heading p{color:var(--muted);font-size:12px;margin-bottom:0}.day-pill{display:inline-flex;align-items:center;gap:6px;border:1px solid #dce5d5;border-radius:20px;padding:5px 10px;font-size:10px;color:#6e865d;background:#fafcf6;white-space:nowrap}.day-pill:before{content:'';width:5px;height:5px;background:#8ea878;border-radius:50%}.hero{background:#eaf0e4;border:1px solid #e0e8d9;border-radius:14px;position:relative;overflow:hidden;display:flex;min-height:231px;padding:29px 31px;margin-bottom:23px}.hero-content{position:relative;z-index:1;width:65%}.hero h2{font-size:27px;letter-spacing:.5px;margin:5px 0 10px;font-weight:550}.hero p{color:#7c8c71;font-size:12px;line-height:1.9;margin-bottom:22px}.hero .eyebrow{color:#829575;letter-spacing:2px;margin-bottom:5px;font-size:9px}.hero-art{position:absolute;right:0;top:0;bottom:0;width:35%;display:grid;place-items:center}.formula-orbit{position:absolute;width:210px;height:210px;border:1px solid #bccdaf77;border-radius:50%;transform:rotate(-20deg);display:grid;place-items:center}.formula-orbit:before{content:'';position:absolute;inset:22px -23px;border:1px solid #bccdaf55;border-radius:50%;transform:rotate(65deg)}.hero-sigma{font-family:Georgia,serif;font-size:105px;font-style:italic;font-weight:400;color:#8ca780;opacity:.64;line-height:1}.floating-math{position:absolute;font-family:Georgia,serif;font-style:italic;color:#7f9b74;font-size:17px;transform:rotate(-6deg)}.floating-math.one{top:24px;right:35px}.floating-math.two{bottom:24px;left:2px;font-size:13px}.floating-math.three{top:41px;left:6px;font-size:13px}.hero-time{font-size:10px;color:#8e9a82;margin-left:12px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:29px}.stat{padding:19px 23px;border:1px solid var(--line);border-radius:10px;background:white;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between}.stat-label{font-size:11px;color:#899282;margin-bottom:5px}.stat-number{font-size:28px;line-height:1.3;font-weight:550;font-variant-numeric:tabular-nums}.stat-number small{font-size:10px;color:#98a390;font-weight:400;margin-left:7px}.stat-note{font-size:9px;color:#a5ac9d;margin-top:7px}.stat-icon{width:38px;height:38px;border-radius:10px;background:#f1f5eb;display:grid;place-items:center;font-size:21px;color:#9bad8c}.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.section-title h2{font-size:15px;margin:0}.section-title p{font-size:10px;color:#a2ac9a;margin:0}.section-title a{font-size:10px;color:#859578}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:27px}.subject-card{border:1px solid var(--line);border-radius:10px;background:white;padding:20px;text-align:left;color:var(--ink);transition:border-color .2s,transform .2s;min-width:0}.subject-card:hover{border-color:#a4b89b;transform:translateY(-2px)}.subject-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.subject-glyph{font-family:Georgia,serif;font-size:26px;color:#829a70;background:#f1f4e9;width:39px;height:39px;text-align:center;line-height:39px;border-radius:9px}.subject-card:nth-child(2) .subject-glyph{background:#f5eee4;color:#b39870}.subject-card:nth-child(3) .subject-glyph{background:#edf0f6;color:#8d9bb0}.arrow{color:#a5b398;font-size:18px}.subject-card h3{margin-bottom:6px;font-size:13px}.subject-card p{font-size:9px;color:#919b88;margin:0}.progress-line{height:4px;background:#eef1e9;border-radius:4px;margin:17px 0 8px;overflow:hidden}.progress-line span{height:100%;display:block;background:#9cb789;border-radius:4px}.subject-bottom{display:flex;justify-content:space-between;font-size:8px;color:#9aa58e}.bottom-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}.panel{border:1px solid var(--line);border-radius:10px;background:white;padding:21px}.next-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid #f1f3ed}.next-row:last-child{border:0;padding-bottom:0}.next-icon{font-family:Georgia,serif;font-size:17px;color:#789768;width:33px;height:33px;border-radius:8px;background:#f4f7f0;display:grid;place-items:center}.next-title{font-size:11px}.next-sub{font-size:9px;color:#a4ad9a}.badge{display:inline-flex;border-radius:5px;padding:2px 7px;font-size:9px;background:#edf3e8;color:#859971;white-space:nowrap}.badge.warm{background:#faf1e5;color:#b5986f}.next-row .badge{margin-left:auto}.week{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin-top:18px;text-align:center}.week-day{font-size:9px;color:#9ea995}.week-dot{height:34px;max-width:34px;border:1px solid #e5ecdd;background:#f8faf4;border-radius:7px;display:grid;place-items:center;margin:8px auto;color:#95a981;font-size:12px}.week-dot.done{background:#6f955e;color:white;border-color:#6f955e}.week-dot.current{border-color:#9ab186}.week-note{margin-top:16px;padding-top:13px;border-top:1px solid #f0f2eb;font-size:9px;color:#99a78d;display:flex;justify-content:space-between}.muted{color:var(--muted);font-size:12px}.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px;align-items:center}.toolbar .search{flex:1;min-width:180px}.search,input,textarea,select{border:1px solid #dce3d8;border-radius:7px;padding:10px 12px;background:#fff;color:var(--ink);width:100%;font-size:12px}.toolbar select{width:150px}.count-text{font-size:10px;color:#97a28e}.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:17px}.formula-card{border:1px solid var(--line);background:white;border-radius:11px;padding:22px;display:flex;flex-direction:column;gap:12px;min-width:0}.card-top{display:flex;justify-content:space-between;gap:10px;align-items:center}.formula-card h3{margin:0;font-size:16px}.formula-box{background:#f8faf5;border:1px solid #eef1e8;border-radius:8px;min-height:70px;display:flex;align-items:center;justify-content:center;padding:12px;overflow-x:auto;max-width:100%;font-size:15px}.formula-card .card-meaning{color:#8a9881;font-size:11px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card-meta{display:flex;justify-content:space-between;font-size:9px;color:#9aa88e;gap:6px}.card-actions{display:flex;gap:7px;flex-wrap:wrap;margin-top:auto}.detail{padding:10px 0;border-top:1px solid var(--line);font-size:12px;color:#738267}.detail summary{cursor:pointer;color:#6f8860;font-size:10px}.detail p{margin:12px 0}.empty{padding:50px 25px;text-align:center;border:1px dashed #dce3d4;border-radius:12px;background:#fcfdf9}.empty .empty-icon{font-size:35px;color:#adc09d;margin-bottom:15px}.empty h2{font-size:20px}.empty p{color:#95a187;font-size:12px}.test-layout{max-width:890px;margin:auto}.test-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.test-progress{height:5px;background:#e3e9de;border-radius:5px;overflow:hidden;margin-bottom:26px}.test-progress>span{display:block;height:100%;background:#86a573;transition:width .2s}.test-card{padding:32px;border:1px solid var(--line);background:white;border-radius:12px}.test-card h1{font-size:26px;margin:14px 0 8px}.test-card .question-note{font-size:12px;color:#8e9c84;margin-bottom:26px}.answer-field{display:block;margin-top:20px;font-size:12px;color:#536b47}.answer-field b{display:inline-grid;place-items:center;border-radius:50%;width:21px;height:21px;background:#edf3e6;margin-right:7px;font-size:10px;color:#89a074}.answer-field textarea{display:block;margin-top:10px;background:#fcfdfb;min-height:84px;resize:vertical;font-size:13px;line-height:1.8}.test-buttons{padding-top:22px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}.test-buttons small{color:#9fa993;font-size:9px}.answer-syntax{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap}.symbol-btn{border:1px solid #e3e9de;background:#fbfcf9;border-radius:4px;font-size:11px;padding:2px 7px;color:#899a7a}.feedback{margin-top:22px;padding:23px;background:#f3f7ef;border:1px solid #e0e9d8;border-radius:10px}.feedback h3{margin-bottom:12px;font-size:15px}.feedback p{font-size:12px;color:#74856a;margin-bottom:13px;white-space:pre-wrap}.feedback-label{font-size:10px;font-weight:600;color:#8da379;letter-spacing:1px;margin:14px 0 6px}.rating-title{font-size:12px;color:#6f8261;margin:24px 0 12px}.ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.rating{padding:14px 8px;text-align:center;border:1px solid #dfe7d7;border-radius:8px;background:white;color:#537443;font-size:12px}.rating small{display:block;font-size:9px;margin-top:4px;color:#9aa98a}.rating:hover{border-color:#89a675;background:#f6faf2}.rating[data-rating=again]{color:#ad7755}.completion{padding:43px 30px;background:white;border:1px solid var(--line);border-radius:13px;text-align:center}.completion-symbol{font-size:38px;color:#87a675;display:grid;place-items:center;background:#eff5e9;width:72px;height:72px;border-radius:50%;margin:0 auto 24px}.completion .btn-row{justify-content:center;margin-top:27px}.history-list{display:grid;gap:12px}.history-row{background:white;border:1px solid var(--line);border-radius:10px;padding:18px 22px;display:flex;gap:15px;align-items:center}.history-row details{flex:1;min-width:0}.history-row summary{cursor:pointer;font-size:13px}.history-row small{display:block;color:#9ba78f;font-size:9px;margin-top:4px}.history-row p{white-space:pre-wrap;font-size:12px;color:#8a997c}.settings-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.settings-panel{background:white;border:1px solid var(--line);border-radius:11px;padding:25px}.settings-panel h2{font-size:17px}.settings-panel label{margin:16px 0 13px}.settings-panel p{font-size:11px;color:#8e9c80;line-height:1.9}.settings-panel a{color:#638b50;text-decoration:underline;text-underline-offset:3px}.settings-panel code{background:#f1f5ec;padding:3px 6px;border-radius:3px;font-size:11px;color:#6e865d;word-break:break-all}.connection-pill{display:inline-flex;gap:6px;align-items:center;font-size:10px;border:1px solid #e2e8dc;border-radius:16px;background:#f8fbf4;padding:4px 10px;color:#8b9c7b;margin-bottom:9px}.settings-stack{display:grid;gap:20px;align-content:start}.notice{background:#f7f9f1;border:1px solid #e7ecd9;padding:13px 16px;border-radius:8px;font-size:11px;color:#8b9a75}.sources{font-size:9px;line-height:1.9;color:#99a389;margin-top:12px}.sources a{text-decoration:underline}label{display:block;font-size:11px;font-weight:550;color:#69805a}label small{font-weight:400;color:#9ba88d;float:right}label input,label textarea,label select{display:block;margin-top:7px}textarea{resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.form-grid+label{margin-top:17px}dialog{border:1px solid #dce4d5;border-radius:15px;padding:28px;width:min(700px,calc(100vw - 28px));max-height:90vh;box-shadow:0 20px 80px #203c3326;color:var(--ink);background:#fff}dialog::backdrop{background:#233c3340;backdrop-filter:blur(3px)}.dialog-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:20px}.dialog-top h2{font-size:22px;margin:0}.dialog-top .eyebrow{font-size:8px;margin-bottom:6px}.dialog-bottom{display:flex;gap:9px;justify-content:flex-end;border-top:1px solid var(--line);padding-top:18px;margin-top:22px}.formula-preview{min-height:55px;background:#f7faf3;border-radius:6px;display:flex;align-items:center;justify-content:center;padding:10px;overflow:auto;color:#9ca98e;margin:9px 0 17px;font-size:11px}#card-form>label{margin-bottom:16px}#card-form>.muted{font-size:10px;margin-top:16px}#import-preview{margin-top:16px;padding:15px;background:#f7faf3;border-radius:8px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);color:white;background:#234e3f;padding:11px 20px;border-radius:8px;box-shadow:0 8px 30px #253f342b;z-index:20;opacity:0;pointer-events:none;transition:opacity .2s;font-size:12px;max-width:calc(100vw - 30px)}#toast.show{opacity:1}footer{max-width:1260px;margin:auto;padding:19px 42px;display:flex;justify-content:space-between;font-size:8px;color:#acb5a2;letter-spacing:.5px}.score{display:inline-block;font-size:24px;color:#507b3c;font-weight:600;margin-bottom:8px}.inline-check{display:flex;align-items:center;gap:7px}.inline-check input{width:auto;margin:0}.selection-strip{background:#eff5e9;border:1px solid #dae7d0;padding:12px 16px;border-radius:8px;display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;font-size:11px;gap:12px}.sources-badge{font-size:9px;color:#9aa48e}.mobile-label{display:none}.loading-dot{animation:pulse 1s ease-in-out infinite}@keyframes pulse{50%{opacity:.4}}.katex-display{margin:.25em 0}.katex-error{white-space:pre-wrap;overflow-wrap:anywhere} .formula-box .katex{font-size:1.05em}
@media(min-width:1450px){main{padding-top:42px}.hero{min-height:260px;padding:38px}.hero h2{font-size:32px}.hero-art{right:25px}.stats{margin-bottom:34px}.subject-grid{margin-bottom:34px}}
@media(max-width:1100px){.sidebar{width:195px;padding:28px 15px}.workspace{margin-left:195px;width:calc(100% - 195px)}.brand{font-size:16px;padding:0 5px}.topbar{padding:0 27px}main{padding:29px 27px}.hero{padding:26px}.hero h2{font-size:25px}.hero-content{width:70%}.hero-art{width:30%;opacity:.8}.formula-orbit{width:175px;height:175px}.hero-sigma{font-size:88px}.floating-math{display:none}.stats{gap:11px}.stat{padding:17px}.stat-icon{display:none}.subject-grid{gap:11px}.subject-card{padding:17px}.bottom-grid{gap:15px}.panel{padding:17px}footer{padding:17px 27px}}
@media(max-width:800px){.sidebar{width:74px;padding:24px 9px}.brand{justify-content:center;padding:0}.brand>span:last-child,.nav-caption,.sidebar-note,.profile,.nav-count{display:none}.sidebar nav{margin-top:35px;gap:16px}.sidebar nav a{font-size:0;padding:12px;justify-content:center;gap:0}.nav-icon{font-size:23px}.workspace{margin-left:74px;width:calc(100% - 74px)}.topbar{height:69px;padding:0 22px}.top-actions{gap:12px}.top-actions #date-label{display:none}main{padding:25px 22px}.bottom-grid,.settings-grid{grid-template-columns:1fr}.hero-art{opacity:.45}.hero-content{width:85%}.hero-time{display:none}.card-grid{grid-template-columns:1fr}.page-heading h1{font-size:26px}.subject-card{padding:15px}.subject-card p{display:none}.test-card{padding:25px}.test-card h1{font-size:23px}footer{padding:15px 22px}footer span{display:none}}
@media(max-width:520px){.sidebar{position:fixed;z-index:10;top:auto;bottom:0;left:0;right:0;width:100%;height:66px;padding:5px 9px 8px;border-right:0;border-top:1px solid var(--line)}.brand{display:none}.sidebar nav{display:grid;grid-template-columns:repeat(5,1fr);gap:2px;margin:0}.sidebar nav a{font-size:9px;display:flex;flex-direction:column;gap:4px;padding:6px 0;line-height:1.2}.nav-icon{font-size:19px;height:22px}.workspace{margin:0 0 66px;width:100%}.topbar{padding:0 18px;height:61px}.breadcrumb{font-size:10px}.breadcrumb span{padding:0 7px}.top-actions .btn{font-size:10px;min-height:30px;padding:6px 9px}main{padding:24px 18px 15px}.page-heading{align-items:flex-start;gap:10px;margin-bottom:21px}.page-heading h1{font-size:25px}.page-heading p{font-size:10px}.day-pill{font-size:8px;padding:4px 8px;margin-top:4px}.hero{padding:24px 21px;min-height:212px;margin-bottom:16px}.hero h2{font-size:24px;line-height:1.4;max-width:230px}.hero p{font-size:10px}.hero-content{width:95%}.hero-art{width:35%;right:-24px;opacity:.2}.hero .btn{font-size:11px;min-height:36px}.hero .eyebrow{font-size:7px}.stats{gap:8px;margin-bottom:25px}.stat{padding:13px 11px;border-radius:8px}.stat-label{font-size:9px}.stat-number{font-size:23px}.stat-number small{font-size:8px;margin-left:3px}.stat-note{font-size:7px;line-height:1.6}.subject-grid{gap:8px;margin-bottom:22px}.subject-card{padding:13px 10px}.subject-top{margin-bottom:12px}.subject-glyph{width:30px;height:30px;line-height:30px;font-size:22px}.subject-card h3{font-size:11px}.subject-bottom{font-size:7px;flex-direction:column;gap:4px}.progress-line{margin-top:13px}.arrow{font-size:13px}.section-title h2{font-size:14px}.section-title a{font-size:8px}.section-title p{font-size:8px}.bottom-grid{gap:15px}.formula-card{padding:19px}.form-grid{grid-template-columns:1fr;gap:14px}.test-card{padding:21px 18px}.test-card h1{font-size:22px}.test-top{font-size:11px}.ratings{grid-template-columns:repeat(2,1fr)}.test-buttons .btn{font-size:11px;padding:9px 13px}.feedback{padding:18px 15px}.settings-panel{padding:21px}.history-row{padding:16px;gap:10px}.history-row .badge{font-size:8px}.history-row summary{font-size:12px}dialog{padding:23px 20px}.dialog-top h2{font-size:20px}.dialog-bottom .btn{font-size:11px;padding:9px 13px}.selection-strip{flex-wrap:wrap}footer{padding:16px 18px;font-size:7px}}
math-field{display:block;width:100%;min-height:72px;background:#fcfdf9;border:1px solid #d7e2ce;border-radius:8px;padding:12px 14px;font-size:23px;color:#254f3a;--caret-color:#225c4b;--selection-background-color:#dcebcf;--placeholder-color:#b3c8a3;--placeholder-opacity:.8;overflow-x:auto;max-width:100%}math-field:focus-within{outline:2px solid #9fbc8e;outline-offset:2px}math-field::part(virtual-keyboard-toggle),math-field::part(menu-toggle){display:none}math-field[read-only]{background:#f7faf3}.math-editor{margin-top:11px;min-width:0}.math-help{font-size:11px;color:#6f855f;line-height:1.85;margin:11px 0 9px}.math-help span{color:#9aa890;font-size:10px}.math-structure-keys,.math-symbol-keys,.math-digit-keys,.math-letter-keys{display:flex;flex-wrap:wrap;gap:6px}.math-structure-keys{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));margin-bottom:8px}.math-key{min-height:35px;border:1px solid #dfe7d8;border-radius:6px;background:#f8fbf4;color:#5c7849;padding:6px 10px;font-size:11px}.math-key:hover{border-color:#a2ba8f;background:#edf5e5}.math-symbol-keys .math-key,.math-digit-keys .math-key,.math-letter-keys .math-key{min-width:36px;font-size:16px;padding:4px 8px}.math-more{margin:10px 0 7px;border-top:1px solid #edf0e7;padding-top:8px}.math-more summary{font-size:10px;color:#8c9e7b;cursor:pointer}.math-more[open] summary{margin-bottom:11px}.math-more .math-digit-keys,.math-more .math-letter-keys{margin-bottom:8px}.math-cursor-keys{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.math-cursor-keys button{border:1px solid #e4e9de;background:#fff;border-radius:5px;min-height:30px;padding:4px 10px;font-size:10px;color:#91a080}.math-editor-status{font-size:10px;color:#b78359;margin:4px 0 0}.math-editor-status:empty{display:none}.editor-formula-label{font-size:11px;font-weight:550;color:#69805a;margin-top:17px}.editor-formula-label small{float:right;font-weight:400;color:#9ba88d}.math-source{margin:13px 0 18px}.math-source summary{font-size:10px;color:#93a184;cursor:pointer}.math-source textarea{margin-top:8px;font-family:Consolas,monospace}.answer-meaning{margin-top:16px}.answer-meaning textarea{min-height:65px}@media(max-width:640px){.math-structure-keys{grid-template-columns:repeat(3,minmax(0,1fr))}.math-key{min-height:39px;padding:7px 6px}.math-symbol-keys .math-key,.math-digit-keys .math-key,.math-letter-keys .math-key{min-width:39px;min-height:39px}.math-cursor-keys button{min-height:35px}.math-help{font-size:10px}math-field{font-size:21px;padding:11px 10px}.editor-formula-label small{display:none}}

.priority-intro{margin-bottom:25px}.priority-intro p{font-size:12px;color:#71836a;margin:10px 0 16px;line-height:1.9}.star-row{display:flex;align-items:center;gap:4px;margin:10px 0 14px}.star{border:0;background:none;font-size:24px;color:#b9c5b0;line-height:1.3;padding:2px;cursor:pointer}.star.filled{color:#af8c31}.star-clear{border:0;background:none;color:#87997b;font-size:10px;padding:5px}.star-row span{font-size:10px;color:#87997b;margin-left:auto}.formula-detail{margin:8px 0}.formula-detail .formula-box{margin:15px 0;max-height:300px;overflow:auto}.card-ai-panel{border:1px solid #e0e8d9;background:#f6faf2;border-radius:9px;padding:16px;margin-top:18px}.card-ai-panel p,.card-ai-panel li{font-size:12px;line-height:1.9;white-space:pre-wrap;overflow-wrap:anywhere}.card-ai-panel h3{font-size:15px;margin-top:16px}.card-ai-panel .formula-box{margin:14px 0;overflow:auto}#card-ai-error{color:#b07752}#card-form>label{margin-top:15px}.next-title{overflow-wrap:anywhere}

.next-formula{border-bottom:1px solid #e8eddf;padding:10px 0}.next-formula summary{display:flex;align-items:center;gap:12px;cursor:pointer;list-style:none}.next-formula summary::-webkit-details-marker{display:none}.next-formula .next-title{flex:1}.next-formula small{display:block;font-size:10px;color:#96a28a;margin-top:4px}.next-formula .formula-box{margin:15px 0;overflow:auto}