:root{--ink:#25232a;--muted:#77727f;--paper:#fbfaf7;--white:#fff;--line:#e9e5df;--violet:#7659c8;--violet-soft:#eee9fb;--orange:#e98b65;--green:#4d987f;--red:#c65d5d}*{box-sizing:border-box}html{background:var(--paper)}body{color:var(--ink);background:radial-gradient(circle at 92% 4%, #e5ddf9c7, transparent 26rem), var(--paper);margin:0;font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif}button,input,textarea,select{font:inherit}button{color:inherit}a{color:inherit;text-decoration:none}.brand{align-items:center;gap:11px;display:flex}.brand-mark{background:var(--ink);color:#fff;border-radius:13px;place-items:center;width:40px;height:40px;font:20px Georgia,serif;display:grid}.brand strong,.brand small{display:block}.brand small{color:var(--muted);margin-top:2px;font-size:10px}.login-page{grid-template-columns:1.15fr .85fr;min-height:100vh;display:grid}.login-shell{place-items:center;min-height:100vh;padding:28px;display:grid}.login-shell .login-card{border:1px solid var(--line);background:#fffffff0;border-radius:20px;padding:28px;box-shadow:0 18px 50px #2a24341a}.login-shell .login-card h1{margin:0 0 8px;font:30px Georgia,Songti SC,serif}.login-story{background:linear-gradient(145deg,#f3eefc,#f8e5da 54%,#e8f2ed);flex-direction:column;justify-content:space-between;padding:7vw;display:flex}.login-story h1{letter-spacing:-.04em;margin:0;font:500 clamp(44px,6vw,78px)/1.15 Georgia,Songti SC,serif}.login-story p{color:#625c68;max-width:520px;line-height:1.9}.story-cards{grid-template-columns:repeat(4,1fr);gap:9px;display:grid}.story-cards span{text-align:center;background:#ffffffa6;border:1px solid #fffc;border-radius:14px;padding:15px 10px;font-size:11px}.login-side{background:#ffffffd6;place-items:center;padding:32px;display:grid}.login-card{width:min(410px,100%)}.login-card h2{margin:34px 0 7px;font:32px Georgia,Songti SC,serif}.login-card>p{color:var(--muted);margin:0 0 28px;font-size:12px}.form-stack{gap:15px;display:grid}.form-stack label{gap:7px;font-size:11px;font-weight:700;display:grid}.input{border:1px solid var(--line);background:#fff;border-radius:12px;outline:none;width:100%;height:48px;padding:0 14px}.input:focus{border-color:var(--violet);box-shadow:0 0 0 3px #7659c81a}.primary{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:12px;height:48px;font-weight:700}.primary:disabled{opacity:.45;cursor:not-allowed}.error{color:var(--red);background:#fff0f0;border-radius:10px;padding:10px 12px;font-size:11px}.login-help{border-top:1px solid var(--line);color:var(--muted);margin-top:22px;padding-top:16px;font-size:10px;line-height:1.8}.auth-switch{text-align:center;color:var(--muted);font-size:11px}.auth-switch a{color:var(--violet);margin-left:4px;font-weight:800}.check-row{color:var(--muted);align-items:flex-start;line-height:1.6;grid-template-columns:none!important;gap:9px!important;font-weight:400!important;display:flex!important}.check-row input{flex:none;margin:2px 0 0}.registration-honeypot{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute;left:-10000px}.app{min-height:100vh}.topnav{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);z-index:10;background:#fffc;justify-content:space-between;align-items:center;height:70px;padding:0 4vw;display:flex;position:sticky;top:0}.topnav-right{align-items:center;gap:10px;display:flex}.account-chip{color:var(--muted);font-size:11px}.ghost{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:10px;height:36px;padding:0 13px;font-size:11px}.page{max-width:1280px;margin:auto;padding:38px 4vw 70px}.page-head{justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px;display:flex}.eyebrow{color:var(--violet);letter-spacing:.16em;text-transform:uppercase;font-size:9px;font-weight:800}.page-head h1{margin:7px 0 0;font:500 40px Georgia,Songti SC,serif}.page-head p{color:var(--muted);margin:8px 0 0;font-size:12px}.license-card{background:var(--ink);color:#fff;border-radius:18px;grid-template-columns:1fr auto;gap:6px 20px;min-width:310px;padding:18px 20px;display:grid;box-shadow:0 16px 36px #25232a29}.license-card small{color:#bbb5c1;font-size:9px}.license-card strong{grid-area:1/2/3;font:30px Georgia,serif}.license-card b{font-size:11px}.license-card.expiring{background:#9a633c}.license-card.expired,.license-card.suspended{background:#7c4a4a}.module-grid{grid-template-columns:repeat(4,1fr);gap:13px;display:grid}.module-card{text-align:left;cursor:pointer;border:0;border-radius:18px;flex-direction:column;justify-content:space-between;min-height:195px;padding:20px;transition:all .2s;display:flex}.module-card:hover{transform:translateY(-3px)}.module-card:disabled{opacity:.5;cursor:not-allowed;transform:none}.module-card:first-child{background:#ded4f4}.module-card:nth-child(2){background:#f8d9ca}.module-card:nth-child(3){background:#d6ebe3}.module-card:nth-child(4){background:#eee7d7}.module-card span{opacity:.55;font:italic 11px Georgia}.module-card h2{margin:0 0 7px;font:23px Georgia,Songti SC,serif}.module-card p{color:#625d67;margin:0;font-size:11px;line-height:1.65}.workspace{grid-template-columns:.85fr 1.15fr;gap:16px;margin-top:16px;display:grid}.panel{border:1px solid var(--line);background:#ffffffeb;border-radius:18px;padding:23px;box-shadow:0 10px 30px #2a24340a}.panel h2{margin:0 0 5px;font:21px Georgia,Songti SC,serif}.panel-sub{color:var(--muted);margin:0 0 17px;font-size:10px}.panel-title-row{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.panel-title-row .ghost{flex:none}.select{border:1px solid var(--line);background:#fff;border-radius:10px;width:100%;height:42px;margin-bottom:11px;padding:0 12px}.textarea{border:1px solid var(--line);resize:vertical;border-radius:12px;outline:none;width:100%;min-height:160px;padding:13px;font-size:12px;line-height:1.75}.textarea:focus{border-color:var(--violet);box-shadow:0 0 0 3px #7659c814}.generate{width:100%;margin-top:11px}.output-empty{min-height:310px;color:var(--muted);text-align:center;place-items:center;font-size:11px;line-height:1.8;display:grid}.output-section{border-top:1px solid #efebe6;grid-template-columns:28px 1fr;gap:8px;padding:14px 0;display:grid}.output-section span{color:#afa8b2;font:italic 10px Georgia}.output-section h3{margin:0 0 5px;font-size:11px}.output-section p{color:#625c66;margin:0;font-size:10.5px;line-height:1.7}.usage{color:var(--muted);background:#f7f4ef;border-radius:11px;justify-content:space-between;align-items:center;margin-top:15px;padding:12px 14px;font-size:10px;display:flex}.usage b{color:var(--ink)}.knowledge-panel{border:1px solid var(--line);background:#ffffffeb;border-radius:18px;margin-top:16px;overflow:hidden}.knowledge-head{text-align:left;cursor:pointer;background:0 0;border:0;justify-content:space-between;align-items:center;width:100%;padding:20px 23px;display:flex}.knowledge-head h2{margin:4px 0;font:21px Georgia,Songti SC,serif}.knowledge-head p{color:var(--muted);margin:0;font-size:10px}.knowledge-count{text-align:right;grid-template-columns:auto auto;align-items:end;gap:0 6px;min-width:120px;display:grid}.knowledge-count strong{font:29px Georgia,serif}.knowledge-count span{color:var(--muted);padding-bottom:4px;font-size:9px}.knowledge-count b{color:var(--violet);grid-column:1/3;margin-top:3px;font-size:9px}.knowledge-body{border-top:1px solid var(--line);padding:20px 23px 23px}.upload-box{text-align:center;background:#faf8fd;border:1px dashed #cfc7da;border-radius:14px;align-content:center;place-items:center;gap:5px;min-height:120px;padding:20px;display:grid;position:relative;overflow:hidden}.upload-box input{opacity:0;cursor:pointer;width:100%;height:100%;position:absolute;inset:0}.upload-box strong{font-size:12px}.upload-box span,.upload-box small{color:var(--muted);font-size:9px}.upload-box small{margin-top:5px}.knowledge-list{gap:8px;margin-top:13px;display:grid}.knowledge-list article{border:1px solid #eeeae5;border-radius:11px;grid-template-columns:38px 1fr auto auto;align-items:center;gap:11px;padding:10px;display:grid}.knowledge-list article strong,.knowledge-list article span{display:block}.knowledge-list article strong{font-size:10.5px}.knowledge-list article span,.knowledge-list time{color:var(--muted);margin-top:3px;font-size:8.5px}.knowledge-list article button{color:var(--red);cursor:pointer;background:#fff0f0;border:0;border-radius:8px;padding:7px 9px;font-size:8.5px}.file-icon{background:var(--violet-soft);width:38px;height:38px;color:var(--violet);border-radius:9px;place-items:center;font-size:8px;font-weight:800;display:grid}.knowledge-empty{text-align:center;color:var(--muted);padding:22px;font-size:9.5px}.knowledge-used,.knowledge-generic{border-radius:9px;margin:10px 0;padding:9px 11px;font-size:9px}.knowledge-used{color:#397a65;background:#edf7f2}.knowledge-generic{color:var(--muted);background:#f7f4ef}.student-form{background:#f8f6f1;border-radius:12px;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:12px;padding:12px;display:grid}.student-form .input{height:40px}.student-form .textarea{min-height:70px}.student-form .wide{grid-column:1/3}.form-actions{justify-content:flex-end;gap:7px;display:flex}.form-actions .primary{padding:0 18px}.output-edit{border-top:1px solid #efebe6;grid-template-columns:28px 1fr;gap:8px;padding:13px 0;display:grid}.output-edit>span{color:#afa8b2;padding-top:8px;font:italic 10px Georgia}.output-edit input,.output-edit textarea{background:#fbfaf7;border:1px solid #0000;border-radius:8px;outline:none;width:100%;padding:8px 10px}.output-edit input{margin-bottom:5px;font-size:11px;font-weight:700}.output-edit textarea{resize:vertical;color:#625c66;min-height:82px;font-size:10.5px;line-height:1.7}.output-edit input:focus,.output-edit textarea:focus{border-color:var(--violet);background:#fff}.result-actions{justify-content:flex-end;gap:8px;margin-top:12px;display:flex}.result-actions .primary{padding:0 18px}.result-actions .ghost{height:48px}.export-link{justify-content:center;align-items:center;display:inline-flex}.history-panel{margin-top:16px}.history-count{background:var(--violet-soft);color:var(--violet);border-radius:999px;padding:6px 10px;font-size:9px;font-weight:800}.history-list{gap:8px;display:grid}.history-list>button{text-align:left;cursor:pointer;background:#fff;border:1px solid #eeeae5;border-radius:11px;grid-template-columns:150px 1fr 140px;align-items:center;gap:14px;width:100%;padding:11px 13px;display:grid}.history-list>button:hover{background:#fcfaff;border-color:#cfc4eb}.history-list strong,.history-list span{display:block}.history-list strong{font-size:10.5px}.history-list span{color:var(--violet);margin-top:3px;font-size:8.5px}.history-list p{text-overflow:ellipsis;white-space:nowrap;color:var(--muted);margin:0;font-size:9.5px;overflow:hidden}.history-list time{text-align:right;color:var(--muted);font-size:8.5px}.admin-grid{grid-template-columns:330px 1fr;gap:16px;display:grid}.admin-form{align-content:start;gap:12px;display:grid}.admin-form h2{margin-bottom:8px}.field{gap:6px;font-size:10px;font-weight:700;display:grid}.field .input{height:42px;font-weight:400}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;min-width:820px}th{text-align:left;color:var(--muted);letter-spacing:.06em;padding:0 8px 11px;font-size:9px}td{vertical-align:middle;border-top:1px solid #eeeae5;padding:12px 8px;font-size:10.5px}td strong,td small{display:block}td small{color:var(--muted);margin-top:3px}.status{color:#397a65;background:#eaf5f0;border-radius:999px;padding:5px 8px;font-size:9px;display:inline-block}.status.expiring{color:#a45e2c;background:#fff2e5}.status.expired,.status.suspended{color:var(--red);background:#fff0f0}.status.pending{background:var(--violet-soft);color:var(--violet)}.actions{flex-wrap:wrap;gap:5px;display:flex}.actions button{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;padding:6px 8px;font-size:9px}.actions button:hover{border-color:var(--violet);color:var(--violet)}.notice{color:#397a65;background:#edf7f2;border-radius:10px;margin-bottom:15px;padding:11px 13px;font-size:10px}.password-box{background:#fff8e9;border:1px solid #f2e3b9;border-radius:13px;margin-top:18px;padding:14px}.password-box h3{margin:0 0 7px;font-size:12px}.password-box p{color:#7d6b4e;margin:0 0 10px;font-size:10px;line-height:1.7}.material-panel{border:1px solid var(--line);background:#fffffff0;border-radius:18px;margin-top:16px;overflow:hidden}.material-head{text-align:left;cursor:pointer;background:linear-gradient(115deg,#faf7ff,#fff8f2);border:0;justify-content:space-between;align-items:center;width:100%;padding:22px 23px;display:flex}.material-head h2{margin:5px 0;font:23px Georgia,Songti SC,serif}.material-head p{color:var(--muted);margin:0;font-size:10px}.material-quota{text-align:right;grid-template-columns:auto auto;align-items:end;gap:0 7px;min-width:150px;display:grid}.material-quota strong{color:var(--violet);font:31px Georgia,serif}.material-quota span{color:var(--muted);padding-bottom:5px;font-size:9px}.material-quota b{color:var(--violet);grid-column:1/3;margin-top:4px;font-size:9px}.material-body{border-top:1px solid var(--line);padding:22px 23px 25px}.material-quota-bar{background:#f8f6fb;border-radius:12px;margin-bottom:15px;padding:13px 15px}.material-quota-bar>div{color:var(--muted);justify-content:space-between;font-size:10px;display:flex}.material-quota-bar b{color:var(--ink)}.material-quota-bar i{background:#e7e1ef;border-radius:999px;height:7px;margin:9px 0 7px;display:block;overflow:hidden}.material-quota-bar em{background:var(--violet);border-radius:inherit;height:100%;display:block}.material-quota-bar small{color:var(--muted);font-size:8.5px}.material-layout{grid-template-columns:330px 1fr;align-items:start;gap:16px;display:grid}.material-form{border:1px solid var(--line);border-radius:15px;gap:12px;padding:15px;display:grid;position:sticky;top:86px}.material-upload{text-align:center;background:#faf8fd;border:1px dashed #c9bedc;border-radius:12px;align-content:center;place-items:center;gap:6px;min-height:112px;padding:15px;display:grid;position:relative;overflow:hidden}.material-upload input{opacity:0;cursor:pointer;position:absolute;inset:0}.material-upload strong{text-overflow:ellipsis;white-space:nowrap;max-width:270px;font-size:11px;overflow:hidden}.material-upload span{color:var(--muted);font-size:8.5px;line-height:1.5}.material-fields{grid-template-columns:1fr 1fr;gap:8px;display:grid}.material-fields .input{height:41px;font-size:10px}.material-form .select{height:41px;margin:0}.page-count-options{grid-template-columns:repeat(3,1fr);gap:7px;display:grid}.page-count-options button{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:10px;padding:10px 4px}.page-count-options button.active{border-color:var(--violet);background:var(--violet-soft);color:var(--violet)}.page-count-options b,.page-count-options span{display:block}.page-count-options b{font-size:11px}.page-count-options span{color:var(--muted);margin-top:3px;font-size:8px}.material-generate{width:100%}.material-warning{color:var(--red);margin:0;font-size:9px;line-height:1.6}.material-preview{border:1px solid var(--line);border-radius:15px;min-width:0;padding:17px}.material-preview h3{margin:0 0 4px;font:19px Georgia,Songti SC,serif}.material-preview .panel-title-row p{color:var(--muted);margin:0;font-size:9px}.material-download{height:38px;padding:0 13px;font-size:10px}.material-empty{text-align:center;min-height:300px;color:var(--muted);place-items:center;font-size:10px;display:grid}.material-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-height:870px;margin-top:15px;padding-right:3px;display:grid;overflow:auto}.material-card{aspect-ratio:3/4;color:#25232a;background:#f8f2e8;border-left:7px solid #7659c8;border-radius:15px;flex-direction:column;padding:17px;display:flex;position:relative;overflow:hidden}.material-card.warm-notes{color:#392d2a;background:#fff5ef;border-color:#df7752}.material-card.clean-grid{color:#20342e;background:#eef7f3;border-color:#3e8d72}.material-card-top{color:#7659c8;justify-content:space-between;font-size:8px;font-weight:800;display:flex}.material-card.warm-notes .material-card-top{color:#df7752}.material-card.clean-grid .material-card-top{color:#3e8d72}.material-card h4{margin:15px 0 7px;font-size:17px;line-height:1.25}.material-card>p{color:#665f68;margin:0;font-size:8.5px;line-height:1.6}.material-card ul{gap:7px;margin:12px 0;padding:0;list-style:none;display:grid}.material-card li{background:#ffffffe0;border-radius:9px;grid-template-columns:22px 1fr;align-items:center;gap:7px;padding:7px;display:grid}.material-card li b{color:#7659c8;background:#eee9fb;border-radius:50%;place-items:center;width:22px;height:22px;font-size:8px;display:grid}.material-card.warm-notes li b{color:#df7752;background:#f9dfd2}.material-card.clean-grid li b{color:#3e8d72;background:#d7ece4}.material-card li span{font-size:8px;line-height:1.45}.material-card aside{background:#eee9fbe6;border-radius:9px;margin-top:auto;padding:8px;font-size:7.5px;line-height:1.5}.material-card.warm-notes aside{background:#f9dfd2}.material-card.clean-grid aside{background:#d7ece4}.material-card aside strong{color:#7659c8;margin-bottom:3px;display:block}.material-card.warm-notes aside strong{color:#df7752}.material-card.clean-grid aside strong{color:#3e8d72}.material-card>button{cursor:pointer;background:#fffc;border:0;border-radius:8px;height:29px;margin-top:8px;font-size:8px}.material-history{border-top:1px solid var(--line);margin-top:17px;padding-top:16px}.material-history h3{margin:0 0 9px;font-size:11px}.material-history>div{gap:8px;display:flex;overflow:auto}.material-history button{border:1px solid var(--line);text-align:left;cursor:pointer;background:#fff;border-radius:10px;flex:0 0 210px;padding:10px}.material-history strong,.material-history span{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.material-history strong{font-size:9.5px}.material-history span{color:var(--muted);margin-top:4px;font-size:8px}.feedback-panel{border:1px solid var(--line);background:#ffffffeb;border-radius:16px;margin-top:16px;overflow:hidden}.feedback-head{cursor:pointer;text-align:left;background:0 0;border:0;justify-content:space-between;align-items:center;width:100%;padding:17px 20px;display:flex}.feedback-head>div{align-items:center;gap:11px;display:flex}.feedback-head>div>span{background:var(--violet-soft);border-radius:11px;place-items:center;width:38px;height:38px;display:grid}.feedback-head strong,.feedback-head small{display:block}.feedback-head strong{font-size:12px}.feedback-head small{color:var(--muted);margin-top:4px;font-size:9px}.feedback-head>b{color:var(--violet);font-size:9px}.feedback-form{border-top:1px solid var(--line);padding:18px 20px}.feedback-fields{grid-template-columns:220px 1fr;align-items:start;gap:12px;display:grid}.feedback-fields .select{margin:0}.feedback-message{position:relative}.feedback-message .textarea{min-height:110px}.feedback-message>small{color:var(--muted);font-size:8px;position:absolute;bottom:8px;right:9px}.feedback-actions{justify-content:space-between;align-items:center;gap:12px;margin-top:11px;display:flex}.feedback-actions span{color:var(--muted);font-size:8.5px}.feedback-actions .primary{height:40px;padding:0 18px}.feedback-admin-list{gap:9px;display:grid}.feedback-admin-list article{border:1px solid #eeeae5;border-radius:12px;padding:13px}.feedback-admin-meta{align-items:center;gap:8px;display:flex}.feedback-admin-meta b{font-size:9.5px}.feedback-admin-meta time{color:var(--muted);margin-left:auto;font-size:8.5px}.feedback-admin-list article>p{white-space:pre-wrap;margin:11px 0;font-size:10.5px;line-height:1.7}.feedback-admin-bottom{color:var(--muted);align-items:center;gap:12px;font-size:8.5px;display:flex}.feedback-admin-bottom small{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.feedback-admin-bottom .actions{margin-left:auto}@media (max-width:900px){.login-page{grid-template-columns:1fr}.login-story{display:none}.module-grid{grid-template-columns:repeat(2,1fr)}.workspace,.admin-grid{grid-template-columns:1fr}.page-head{flex-direction:column;align-items:start}.license-card{width:100%;min-width:0}}@media (max-width:1050px){.material-layout{grid-template-columns:1fr}.material-form{position:static}.material-cards{grid-template-columns:repeat(3,minmax(210px,1fr));overflow:auto}}@media (max-width:900px){.material-cards{grid-template-columns:repeat(2,minmax(210px,1fr))}}@media (max-width:560px){.topnav{padding:0 16px}.page{padding:26px 16px 55px}.module-grid{grid-template-columns:1fr}.module-card{min-height:155px}.workspace{grid-template-columns:1fr}.topnav .brand small,.account-chip{display:none}.knowledge-list article{grid-template-columns:38px 1fr auto}.knowledge-list time{display:none}.knowledge-head,.material-head{align-items:flex-start}.knowledge-count,.material-quota{min-width:90px}.material-head p{display:none}.material-body{padding:15px}.material-fields,.feedback-fields{grid-template-columns:1fr}.material-cards{grid-template-columns:1fr;max-height:720px}.feedback-actions,.feedback-admin-bottom{flex-direction:column;align-items:flex-start}.feedback-admin-meta{flex-wrap:wrap}.feedback-admin-meta time{width:100%;margin:0}.student-form{grid-template-columns:1fr}.student-form .wide{grid-column:1}.history-list>button{grid-template-columns:90px 1fr}.history-list time{display:none}}