@font-face{font-family:StudioSerif;src:local('Noto Serif CJK SC'),local('Source Han Serif SC'),local('SimSun');font-display:swap}
:root{--blue:#2458df;--blue-light:#eef3ff;--ink:#172033;--muted:#748096;--line:#e7ebf2;--paper:#fff;--bg:#f6f8fc;--radius:16px;--ease:cubic-bezier(.2,.7,.2,1)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Microsoft YaHei UI','Noto Sans CJK SC',sans-serif;font-size:14px;line-height:1.7}a{color:var(--blue);text-decoration:none;transition:color .2s,background .2s,transform .2s}a:hover{color:#143caa}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}h1,h2,h3,p{margin-top:0}h1{font-size:32px;font-weight:650;letter-spacing:-1px;line-height:1.5;margin-bottom:10px}h2{font-size:18px;font-weight:650;margin-bottom:18px}h3{font-size:16px}small{font-size:12px}.muted{color:var(--muted)}.blue{color:var(--blue)}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--muted);margin-bottom:12px}.sidebar{width:240px;background:var(--paper);position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:34px 20px;display:flex;flex-direction:column;z-index:5}.brand{font-family:StudioSerif,serif;color:var(--ink);font-size:31px;font-weight:bold;letter-spacing:4px;display:block;padding-left:16px;position:relative}.brand-dot{display:inline-block;width:8px;height:8px;background:var(--blue);border-radius:50%;vertical-align:super;margin-left:6px}.brand small{font-family:inherit;display:block;font-size:9px;letter-spacing:2px;color:var(--muted);margin-top:-1px}.workspace{font-size:11px;letter-spacing:1px;color:var(--muted);margin:43px 16px 15px}nav{display:grid;gap:8px}nav a{display:flex;align-items:center;gap:14px;color:#68738a;padding:12px 16px;border-radius:10px;font-size:13px}nav a:hover{background:#f5f7fb;transform:translateX(2px)}nav a.active{background:var(--blue-light);color:var(--blue);font-weight:700}svg.lucide{width:18px;height:18px;stroke-width:1.7;flex-shrink:0}.sidebar-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:22px;display:flex;gap:10px;align-items:center}.sidebar-footer small{display:block;font-size:10px}.sidebar-footer form{margin-left:auto}.avatar{width:35px;height:35px;border-radius:11px;background:var(--blue-light);color:var(--blue);display:grid;place-items:center;font-size:13px;font-weight:700;flex-shrink:0}.icon-button{border:0;background:transparent;padding:5px;color:var(--muted);display:flex}.main{margin-left:240px;min-height:100vh;display:flex;flex-direction:column}.main.guest{margin-left:0}.topbar{height:72px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 44px;color:var(--muted);font-size:11px;letter-spacing:.5px;background:#ffffffa6}.status-dot{display:flex;align-items:center;gap:8px}.status-dot:before{content:'';width:5px;height:5px;border-radius:50%;background:#35a38c}.content{width:100%;max-width:1480px;margin:auto;padding:40px 44px 64px;flex:1}footer{display:flex;justify-content:space-between;margin:0 44px;padding:20px 0;border-top:1px solid var(--line);color:#9ba5b6;font-size:10px;letter-spacing:1px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:30px}.page-heading p{margin:0}.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:9px 18px;border:1px solid #dce3ef;border-radius:9px;background:#fff;color:#526078;font-size:12px;white-space:nowrap;transition:transform .2s var(--ease),box-shadow .2s,background .2s,opacity .2s}.button:hover{transform:translateY(-2px);box-shadow:0 5px 14px #273c7010;background:#fafcff}.button:active{transform:scale(.97)}.button.primary{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 4px 10px #2458df15}.button.primary:hover{background:#1745c2}.button.full{width:100%}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:26px}.stat{background:#fff;padding:23px 25px;border:1px solid var(--line);border-radius:var(--radius);position:relative;overflow:hidden}.stat:first-child:before{content:'';position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--blue)}.stat span{font-size:12px;color:var(--muted)}.stat strong{display:block;font-family:StudioSerif,serif;font-weight:500;font-size:44px;line-height:1.6}.stat strong.small-number{font-size:27px;line-height:2.6}.stat small{display:block;color:#9aa3b3;font-size:10px}.stat .pending-label{font-size:26px;color:var(--ink)}.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;margin-bottom:22px;box-shadow:0 3px 12px #23355002}.two-column{display:grid;grid-template-columns:1.2fr 1fr;gap:24px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:18px}.section-heading h2{margin:0}.section-heading a{font-size:11px}.record{display:flex;gap:14px;align-items:center;border-bottom:1px solid #f0f2f6;padding:17px 0;color:var(--ink)}.record:last-child{border-bottom:0}.record strong{font-size:13px;font-weight:600}.record small{display:block;color:var(--muted);margin-top:5px;font-size:11px}.record-icon{display:grid;place-items:center;width:42px;height:46px;border:1px solid var(--line);border-radius:10px;color:#8190aa;background:#fafbfe}.grow{flex:1}.badge{display:inline-block;font-size:10px;padding:4px 10px;border-radius:6px;background:#f2f4f8;color:#748096;white-space:nowrap}.badge.published,.badge.done{color:var(--blue);background:var(--blue-light)}.badge.error{background:#fff1f1;color:#bf4646}.badge.archived{background:#edf0f4}.workflow{background:linear-gradient(135deg,#fbfcff,#f0f4ff);border-color:#e2e9fc}.workflow h2{font-size:21px;margin-bottom:30px}.workflow ol{list-style:none;padding:0;margin:0}.workflow li{display:flex;gap:22px;padding:15px 0}.workflow li b{font-family:StudioSerif,serif;color:#8fa9ed;font-size:23px;font-weight:400}.workflow li strong{font-size:13px}.workflow li p{font-size:11px;color:var(--muted);margin:5px 0 0}.text-link{display:inline-flex;align-items:center;gap:8px;font-size:12px}.workflow .text-link{margin-top:20px}.empty{padding:40px;text-align:center;color:var(--muted)}.empty svg{width:34px;height:34px;stroke-width:1;margin-bottom:16px}.empty h2,.empty h3{color:#65738b}.empty p{font-size:12px}.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding:18px}.filters input{width:140px;margin:0}.filters input[name=q]{width:190px}.filters select{width:130px;margin:0}label{display:block;font-size:12px;font-weight:600;margin:0 0 8px}input:not([type=checkbox]):not([type=radio]),select,textarea{border:1px solid #dce3ee;background:#fcfdff;color:var(--ink);padding:11px 13px;border-radius:8px;width:100%;transition:border-color .2s,box-shadow .2s,background .2s}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2458df0c;background:#fff}textarea{resize:vertical;line-height:1.8}select[multiple]{min-height:100px}input[type=radio],input[type=checkbox]{accent-color:var(--blue);width:16px;height:16px;flex-shrink:0}form p{margin-bottom:21px}.helptext{display:block;font-size:11px;color:var(--muted);margin:7px 0}.errorlist{color:#bf4646;font-size:12px;padding-left:18px}.notice{padding:14px 18px;border:1px solid #dee7fd;background:#f4f7ff;border-radius:9px;color:#5b6f9b;font-size:12px;margin-bottom:20px}.notice.error{background:#fff5f5;border-color:#f4dddd;color:#b34a4a}.notice.success{background:#f0faf6;border-color:#d9efe3;color:#388165}.tags{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.topic{color:#6c83b3;font-size:10px;padding:2px 0}.topic:before{content:'#';margin-right:3px;color:#adbedc}.question-stem{font-size:16px;line-height:2;margin:20px 0}.option-text{margin:5px 0;color:#65738b}details{margin:18px 0;font-size:12px}summary{cursor:pointer;color:var(--blue);padding:5px 0}details[open]>:not(summary){animation:reveal .25s var(--ease)}.card-footer{border-top:1px solid var(--line);margin-top:23px;padding-top:15px;display:flex;align-items:center;justify-content:space-between}.text-button{display:inline-flex;gap:7px;background:transparent;border:0;font-size:11px;color:var(--muted)}.danger:hover{color:#be4545}.text-button svg{width:14px}.pagination{display:flex;gap:20px;align-items:center;justify-content:center;color:var(--muted);font-size:12px}.sticky{position:sticky;top:25px;align-self:start}.preview #formula-preview{padding:25px 0;min-height:150px}.code-editor,#id_rules{font-family:Consolas,monospace;font-size:12px}.parsed-question{padding:22px 0;border-top:1px solid var(--line)}.parsed-question .math-content{margin-top:14px;font-size:15px}.evidence{font-size:11px;color:#7f8da7;padding-left:17px}.paper-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.paper-card h2{margin:30px 0 10px}.paper-card .section-heading>svg{color:var(--blue);width:25px;height:25px}.answer-option{display:flex;align-items:center;gap:15px;border:1px solid var(--line);padding:14px 18px;border-radius:9px;font-weight:400;transition:all .2s;cursor:pointer}.answer-option:hover,.answer-option:has(input:checked){background:var(--blue-light);border-color:#b4c7fb}.answer-option b{color:var(--muted);font-size:12px}.submit-bar{position:sticky;bottom:15px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 5px 30px #182f5912}.feedback-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:20px 0}.solution{background:#f6f8fc;padding:20px;border-radius:10px;margin:15px 0;color:#60708a;font-size:13px}.solution p{margin:10px 0 0}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:12px}th{color:var(--muted);font-weight:500;background:#fafbfd}td,th{padding:16px;border-bottom:1px solid var(--line);white-space:nowrap}.rate-row{display:flex;gap:20px;align-items:center;padding:13px 0;font-size:12px}.rate-row meter{flex:1;height:15px}.job-panel{text-align:center;padding:60px}.job-panel small{display:block;margin-top:24px}.error-log{white-space:pre-wrap;text-align:left;background:#fff5f5;padding:20px;color:#b34a4a;font-size:12px;max-height:350px;overflow:auto}.spinner{width:38px;height:38px;border:3px solid #e9eefd;border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}.success-icon{background:var(--blue-light);color:var(--blue);width:60px;height:60px;border-radius:50%;display:grid;place-items:center;margin:0 auto 20px}.rule-row{display:grid;grid-template-columns:repeat(4,1fr) 75px 85px 32px;gap:10px;align-items:end;margin:15px 0;animation:reveal .25s var(--ease)}.rule-row label{font-size:10px;color:var(--muted)}.rule-row input,.rule-row select{padding:9px 7px!important;font-size:11px}.rule-row .remove-rule{padding:10px 4px;border:0;background:transparent;color:#aab1bd}.login-layout{max-width:1160px;margin:8vh auto;display:grid;grid-template-columns:1.3fr 1fr;gap:70px;align-items:center}.login-story h1{font-family:StudioSerif,serif;font-size:44px;line-height:1.7;letter-spacing:1px}.login-story>p{font-size:13px;line-height:2.2;color:var(--muted)}.login-card{padding:38px}.login-card h2{font-size:23px;margin-bottom:8px}.login-card .button{margin:10px 0 24px}.formula-art{font-family:StudioSerif,serif;font-size:27px;color:#889fd6;letter-spacing:1px;margin:38px 0}.formula-art span{font-size:18px;font-style:italic}.formula-art b{font-weight:400;color:#b7c5e4}.login-features{display:flex;gap:22px;font-size:11px;color:#6e7d99}.login-features span{display:flex;align-items:center;gap:8px}.skip{position:fixed;left:10px;top:-80px;z-index:20;background:white;padding:10px}.skip:focus{top:10px}.math-content{overflow-wrap:anywhere}.math-content mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden}
@keyframes reveal{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes disappear{to{opacity:0;transform:translateY(-6px)}}.content>.panel,.content>.page-heading,.content>.stats-grid,.content>.two-column,.content>.paper-grid,.content>.login-layout{animation:reveal .45s var(--ease) both}.stats-grid .stat:nth-child(2){animation-delay:40ms}.stats-grid .stat:nth-child(3){animation-delay:80ms}.stats-grid .stat:nth-child(4){animation-delay:120ms}.stat,.panel,.paper-card,.record{transition:transform .25s var(--ease),box-shadow .25s,background .25s}.record:hover{background:#fafcff}.leaving{animation:disappear .15s var(--ease) both}html{view-transition-name:root}::view-transition-old(root){animation:disappear .15s both}::view-transition-new(root){animation:reveal .25s both}
@media(max-width:1200px){.content{padding:30px 25px}.sidebar{width:210px}.main{margin-left:210px}.stats-grid{gap:12px}.stat{padding:20px}.two-column{grid-template-columns:1fr 1fr;gap:18px}.paper-grid{grid-template-columns:repeat(2,1fr)}.rule-row{grid-template-columns:repeat(3,1fr)}.login-layout{gap:35px}.login-story h1{font-size:35px}}
@media(max-width:850px){.sidebar{position:relative;width:100%;padding:18px;inset:auto;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:24px}.brand small,.workspace,.sidebar-footer{display:none}nav{display:flex;overflow:auto;gap:5px;margin-top:16px}nav a{white-space:nowrap;padding:8px 12px;font-size:11px;gap:6px}.main{margin-left:0}.topbar{height:50px;padding:0 22px}.content{padding:25px 18px}.stats-grid{grid-template-columns:repeat(2,1fr)}.two-column,.login-layout{grid-template-columns:1fr}.page-heading{align-items:flex-start;flex-direction:column}h1{font-size:26px}.panel{padding:22px}.paper-grid{grid-template-columns:1fr}.login-layout{margin:20px auto}.login-story{display:none}.login-card{max-width:500px;width:100%;margin:auto}.submit-bar{flex-wrap:wrap;gap:15px}.feedback-grid{grid-template-columns:1fr}footer{margin:0 18px}footer span{display:none}.filters input,.filters select{width:calc(50% - 10px)}.sticky{position:static}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media(max-width:850px){.sidebar-footer{display:flex;max-width:100%;margin-top:12px;padding-top:12px}.sidebar-footer small{font-size:11px}.sidebar-footer form{margin-left:auto}}
@view-transition{navigation:auto}

.code-block{padding:16px 18px;background:#f5f7fb;border:1px solid #e1e7ef;border-radius:12px;overflow-x:auto;white-space:pre;font:13px/1.7 Consolas,monospace;tab-size:4;color:#172033;max-width:100%}.code-block code{white-space:pre}.import-defaults{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}.review-check{display:flex;align-items:flex-start;gap:10px;margin:18px 0}.review-check input{width:auto;flex:none;margin-top:4px}

.feedback-grid>div{min-width:0}.code-block{min-width:0}

/* Mobile navigation keeps the desktop workspace and exposes it as a drawer. */
.nav-toggle,.nav-close,.nav-backdrop{display:none}
@media(max-width:850px){
  .sidebar{position:fixed;inset:0 auto 0 0;width:min(300px,86vw);height:100dvh;padding:30px 20px 20px;border-right:1px solid var(--line);border-bottom:0;z-index:32;transform:translateX(-102%);visibility:hidden;transition:transform .28s var(--ease),visibility .28s;overflow-y:auto;overscroll-behavior:contain}
  .sidebar.is-open{transform:translateX(0);visibility:visible}
  .sidebar .brand small{display:block}.sidebar .workspace{display:block;margin:30px 16px 14px}
  .sidebar nav{display:grid;overflow:visible;gap:6px;margin:0}.sidebar nav a{padding:12px 16px;font-size:13px;gap:14px;min-height:46px}
  .sidebar-footer{margin-top:auto;padding-top:18px}.sidebar nav{margin-bottom:24px}
  .nav-toggle,.nav-close{display:flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border-radius:10px;transition:background .2s,transform .2s}
  .nav-toggle:hover,.nav-close:hover{background:var(--blue-light)}.nav-toggle:active,.nav-close:active{transform:scale(.94)}
  .nav-close{position:absolute;right:12px;top:18px;z-index:1}.sidebar .brand{padding-right:44px}.nav-backdrop{display:block;position:fixed;inset:0;z-index:31;border:0;background:#17203366;opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s}
  .nav-backdrop[hidden]{display:none}.nav-backdrop.is-open{opacity:1;visibility:visible}
  body.nav-open{overflow:hidden}.topbar{gap:10px;padding:0 14px;height:60px}.topbar>span:first-of-type{flex:1}.topbar .status-dot{display:none}
}
@media(prefers-reduced-motion:reduce){.sidebar,.nav-backdrop{transition-duration:.01ms!important}}