/* Su Yi Er: one clear starting point, existing tools remain available. */
.simple-app{background:#f8fafc;color:#1e344b}.simple-app .shell{margin-left:0;min-height:100vh;display:flex;flex-direction:column}.simple-app main{width:100%;max-width:1240px;padding:28px 40px 45px;flex:1}.app-header{height:86px;padding:0 42px;display:flex;align-items:center;justify-content:space-between;gap:25px;border-bottom:1px solid #e9eef3;background:#fff}.app-brand{display:flex;align-items:center;gap:12px;color:#193956;text-decoration:none;min-width:185px}.app-brand>img{width:45px;height:40px;object-fit:contain}.app-brand>span{font-weight:650;font-size:20px;line-height:1.3;letter-spacing:1px}.app-brand small{display:block;font-size:11px;font-weight:400;letter-spacing:.5px;color:#75889a;margin-top:5px}.app-primary{display:flex;gap:8px;align-items:center}.app-primary a{font-size:13px;padding:9px 18px;display:block;border-radius:8px;color:#6c7d8c;text-decoration:none}.app-primary a.active{background:#edf4f8;color:#195a91;font-weight:600}.app-primary a:hover{background:#f1f5f9;color:#195a91}.app-header-tools{display:flex;align-items:center;justify-content:flex-end;gap:20px;min-width:185px}.app-more{position:relative}.app-more>summary{cursor:pointer;list-style:none;color:#64788c;padding:8px 0 8px 12px;font-size:12px;user-select:none}.app-more>summary::-webkit-details-marker{display:none}.app-more>summary span{margin-left:7px}.app-more-panel{position:absolute;right:0;top:42px;z-index:40;width:250px;padding:13px;background:white;border:1px solid #dfe7ef;border-radius:13px;box-shadow:0 16px 48px #153b5e1a}.app-more-panel nav{display:grid;gap:2px;overflow:visible;min-height:0;padding:0;margin:0}.app-more-panel nav a{display:flex;align-items:center;gap:11px;padding:10px 12px;color:#526a7c;font-size:12px;border-radius:7px;white-space:normal}.app-more-panel nav a:hover,.app-more-panel nav a.active{background:#edf4f8;color:#195a91}.app-more-panel nav svg{width:16px;height:16px}.app-backup{display:flex;gap:7px;border-top:1px solid #e5edf3;padding:13px 3px 0;margin-top:8px}.app-backup button{font-size:11px;flex:1;padding:7px 8px}.app-more-panel>p{font-size:10px;color:#8795a3;padding:0 5px;line-height:1.8;margin:12px 0 2px}.route-bar{max-width:1240px;width:100%;margin:auto;padding:20px 40px 0;color:#8493a1;font-size:11px}.is-studio .route-bar{display:none}.simple-app .bottom{max-width:1240px;width:100%;margin:auto;padding:20px 40px 23px;border-top:1px solid #e9eef3;font-size:11px}.simple-app .bottom>div>span{display:block;font-size:10px;margin-top:4px;color:#9aa7b3}.simple-app .footer-website{font-size:10px;gap:10px}.simple-app .footer-website img{width:48px;height:48px}.studio{max-width:800px;margin:30px auto 0}.studio-welcome{text-align:center;margin-bottom:30px}.studio-avatar{position:relative;width:76px;height:82px;margin:0 auto 11px;overflow:hidden}.studio-avatar img{position:absolute;left:0;top:0;width:228px;max-width:none}.studio-name{font-size:12px;letter-spacing:1px;color:#70889b;margin:0 0 12px}.studio-welcome h1{font-size:35px;line-height:1.4;letter-spacing:1px;font-weight:600;color:#173b5b;margin:0 0 12px}.studio-subtitle{color:#8192a0;font-size:13px;margin:0}.studio-composer{background:#fff;border:1px solid #dbe5ed;border-radius:18px;box-shadow:0 8px 30px #163e5e06;padding:17px 19px 14px;transition:border-color .15s}.studio-composer:focus-within{border-color:#68a3bd;box-shadow:0 0 0 3px #ddecf477}.studio-composer>textarea{border:0!important;outline:0!important;box-shadow:none!important;background:transparent;padding:5px 3px;resize:vertical;font-size:15px;min-height:95px;max-height:270px;line-height:1.8}.studio-composer>textarea::placeholder{color:#a0aebb}.studio-compose-bottom{display:flex;align-items:center;gap:13px;margin-top:10px}.studio-attach{border:0;padding:7px 3px;background:transparent!important;font-size:12px;font-weight:400;color:#6d8496;white-space:nowrap}.studio-attached{font-size:11px;color:#9ba8b3;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}.studio-send{color:#fff;background:#195a91;border-color:#195a91;border-radius:10px;padding:9px 14px;font-size:12px;white-space:nowrap}.studio-send:hover{color:white;background:#164d7a}.studio-send>span{margin-left:13px;font-size:19px;line-height:1}.studio-disclosure{text-align:center;font-size:10px;color:#9aa9b6;margin:12px 0 21px}.studio-suggestions{display:flex;justify-content:center;gap:9px;flex-wrap:wrap}.studio-suggestions button{font-size:11px;font-weight:400;color:#748b9d;background:transparent;border-color:#e0e8ef;border-radius:20px;padding:7px 14px}.studio-demo{display:flex;align-items:center;gap:14px;text-decoration:none;color:inherit;border-top:1px solid #e5edf3;padding:24px 2px 0;margin-top:39px;flex-wrap:wrap}.studio-demo>span{font-size:11px;color:#8c9ba7}.studio-demo strong{font-size:13px;font-weight:500;color:#376682}.studio-demo strong span{margin-left:8px}.studio-demo small{font-size:10px;color:#9aa8b3;margin-left:auto}.has-session{margin-top:0;max-width:880px}.has-session .studio-welcome{margin-bottom:26px}.has-session .studio-avatar{width:46px;height:49px;margin-bottom:7px}.has-session .studio-avatar img{width:138px}.has-session .studio-welcome h1{font-size:25px;margin-bottom:7px}.has-session .studio-name{font-size:10px;margin-bottom:7px}.has-session .studio-subtitle{font-size:11px}.studio-user{max-width:85%;margin:0 0 25px auto;background:#edf4f8;border-radius:15px 15px 4px 15px;padding:14px 19px}.studio-user>span{font-size:10px;color:#8ba0b1}.studio-user p{font-size:13px;margin:5px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.studio-reply{background:white;border:1px solid #e2eaf0;border-radius:15px;padding:23px 25px;margin-bottom:25px}.studio-reply-title{display:flex;align-items:center;gap:9px}.studio-reply-title strong{font-weight:600;font-size:15px}.mini-ip{display:block;position:relative;width:25px;height:28px;overflow:hidden;flex-shrink:0}.mini-ip img{position:absolute;left:0;top:0;width:75px;max-width:none}.studio-reply-copy{font-size:12px;line-height:1.8;color:#8395a4;margin:9px 0 20px}.studio-fields{display:grid;grid-template-columns:1.2fr 1fr 125px;gap:13px}.studio-fields label,.studio-optional label{font-size:11px;color:#657d90}.studio-fields input,.studio-optional input,.studio-optional select,.studio-optional textarea{font-size:12px}.studio-optional{margin-top:18px}.studio-optional>summary{font-size:11px;color:#7e94a6;cursor:pointer;user-select:none}.studio-optional .form-grid{margin-top:16px}.studio-optional>a{font-size:11px;color:#3c799a;text-underline-offset:3px}.studio-confirm-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.studio-confirm-actions button{font-size:12px}.studio-output-tabs{display:flex;border-bottom:1px solid #e4ebf1;gap:17px;margin-bottom:18px;overflow:auto}.studio-output-tabs button{border:0;border-radius:0;border-bottom:2px solid transparent;background:transparent;padding:10px 1px;font-size:12px;font-weight:400;color:#8496a5;white-space:nowrap}.studio-output-tabs button[aria-selected=true]{color:#195a91;border-bottom-color:#2a8aa7;font-weight:600}.studio-draft-tag{font-size:10px;color:#8599a9;margin-left:auto;white-space:nowrap}.studio-reply #studio-output{min-height:370px;max-height:650px;font-size:12px;line-height:1.9;background:#fbfcfd;border-color:#e4ebf1;padding:17px;color:#4c6479}.studio-result-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:17px}.studio-result-actions button{font-size:11px;padding:8px 12px}.studio-save-status{font-size:10px;color:#8d9eac;line-height:1.7;margin:12px 0 0}.studio-references{border-top:1px solid #edf1f5;margin-top:20px;padding-top:14px}.studio-references summary{font-size:11px;color:#7a91a3;cursor:pointer}.studio-references button{display:block;border:0;font-size:11px;padding:6px 0;font-weight:400;color:#3c799a;text-align:left}.studio-session-tools{display:flex;justify-content:center;align-items:center;gap:20px;font-size:11px;color:#8a9cac}.studio-session-tools button{border:0;background:transparent;font-size:11px;font-weight:400;color:#8a9cac;padding:2px}.studio-session-tools a{color:#6e8a9f;text-decoration:none}.sr-only{position:absolute!important;width:1px!important;height:1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important;padding:0!important;margin:-1px!important}@media(max-width:900px){.app-header{padding:0 25px;height:78px;gap:12px}.app-header-tools{min-width:80px;gap:13px}.app-brand{min-width:165px}.app-primary a{padding:8px 12px;font-size:12px}.simple-app main{padding:25px}.route-bar{padding:19px 25px 0}.simple-app .bottom{padding:18px 25px}.studio-demo small{margin-left:0;width:100%}}@media(max-width:600px){.app-header{height:auto;min-height:77px;padding:15px 18px;gap:8px;flex-wrap:wrap}.app-brand{min-width:0;gap:9px;flex:1}.app-brand>img{width:37px;height:32px}.app-brand>span{font-size:18px}.app-brand small{font-size:10px;margin-top:4px}.app-header-tools{min-width:0;gap:12px;order:2}.app-header-tools>.top-ip{display:none}.app-primary{order:3;width:100%;margin:10px 0 0;gap:6px;overflow:visible;padding:0;justify-content:center}.app-primary a{flex:1;text-align:center;padding:8px 7px;font-size:12px}.app-more-panel{width:238px;top:36px}.simple-app main{padding:23px 18px 32px}.simple-app .bottom{padding:17px 18px;display:flex;align-items:center;gap:15px}.simple-app .footer-website{margin-top:0}.simple-app .footer-website>span{display:none}.route-bar{padding:17px 18px 0}.studio{margin-top:12px}.studio-welcome{margin-bottom:25px}.studio-welcome h1{font-size:27px;letter-spacing:0}.studio-subtitle{font-size:12px;max-width:270px;margin:0 auto;line-height:1.9}.studio-avatar{width:66px;height:72px}.studio-avatar img{width:198px}.studio-name{font-size:11px}.studio-composer{padding:13px 13px 12px;border-radius:15px}.studio-composer>textarea{font-size:14px;min-height:109px}.studio-compose-bottom{gap:8px}.studio-attached{font-size:10px}.studio-attach{font-size:11px}.studio-send{font-size:11px;padding:9px 12px}.studio-send>span{margin-left:8px}.studio-disclosure{font-size:9px;line-height:1.8}.studio-suggestions{gap:7px}.studio-suggestions button{font-size:10px;padding:6px 11px}.studio-demo{margin-top:28px;padding-top:20px;gap:8px 12px}.studio-demo strong{font-size:12px}.studio-demo small{font-size:10px}.studio-fields{grid-template-columns:1fr 1fr;gap:12px}.studio-fields>.field:first-child{grid-column:1/-1}.studio-reply{padding:18px 16px}.studio-reply-title strong{font-size:14px}.studio-user{max-width:94%;padding:12px 16px}.studio-user p{font-size:12px}.studio-output-tabs{gap:15px}.studio-output-tabs button{font-size:11px}.studio-reply #studio-output{min-height:340px;padding:12px;font-size:11px}.has-session .studio-welcome h1{font-size:23px}.studio-result-actions{gap:7px}.studio-result-actions button{padding:8px 10px}.studio-optional>.form-grid{grid-template-columns:1fr}.studio-optional .field.full{grid-column:auto}}@media print{.app-header,.route-bar,.studio-composer,.studio-disclosure,.studio-session-tools{display:none}.simple-app .shell{margin:0}.studio{max-width:none}}

/* Official character, teacher variant. */
.studio-avatar{width:128px;height:160px}.studio-avatar img{width:128px}.has-session .studio-avatar{width:54px;height:66px}.has-session .studio-avatar img{width:54px}.top-ip img{width:32px}.mini-ip img{width:25px}.slide-ip img{width:100%}.is-studio .studio{margin-top:15px}@media(max-width:600px){.studio-avatar{width:112px;height:140px}.studio-avatar img{width:112px}.has-session .studio-avatar{width:46px;height:56px}.has-session .studio-avatar img{width:46px}}

.studio-quality{margin-top:18px;padding:14px 16px;background:#f2f7fa;border:1px solid #d9e6ed;border-radius:10px;font-size:12px}.studio-quality summary{cursor:pointer;font-weight:600;color:#214b6c}.studio-quality p,.studio-quality li{line-height:1.8}.quality-checks{display:grid;gap:8px}.quality-checks label{display:flex;align-items:flex-start;gap:8px}.quality-checks input{width:16px;height:16px;margin-top:3px;flex-shrink:0}

/* Public ecosystem navigation. */
.ecosystem-badge{display:block;font-size:10px;font-style:normal;font-weight:400;letter-spacing:.3px;color:#258291;margin-top:5px}.ecosystem-return{font-size:12px;white-space:nowrap;text-decoration:none;color:#28738b;padding:8px 10px;border:1px solid #d8e8ee;border-radius:8px}.ecosystem-return:hover{background:#eef7f9}.app-header{min-height:96px;height:auto;padding-top:12px;padding-bottom:12px}.app-brand{min-width:210px}.app-header-tools{min-width:265px;gap:14px}@media(max-width:900px){.app-header-tools{min-width:210px;gap:10px}.app-header{padding-left:24px;padding-right:24px;gap:12px}.app-primary a{padding-left:9px;padding-right:9px}}@media(max-width:700px){.app-header{flex-wrap:wrap;padding:14px 18px}.app-brand{min-width:0;flex:1}.app-header-tools{min-width:0;gap:10px;order:2}.app-header-tools>.top-ip{display:none}.ecosystem-return{font-size:10px;padding:7px}.app-primary{order:3;width:100%;justify-content:center;margin-top:8px}.app-primary a{flex:1;text-align:center}.ecosystem-badge{font-size:9px;letter-spacing:0}.app-brand>span{font-size:17px}.app-header-tools>.app-more>summary{font-size:11px;padding-left:2px}}@media(max-width:360px){.ecosystem-return{font-size:9px;padding:6px}.app-header{padding-left:12px;padding-right:12px}.app-header-tools{gap:6px}.app-brand{gap:6px}.app-brand>img{width:30px}}