:root{--ink:#18372f;--muted:#6b7971;--green:#215c47;--deep:#163e31;--canvas:#f5f6f1;--line:#dce2d9;--mint:#dcebdc;--white:#fff;--warn:#93542b;--radius:10px;--font:"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font:15px/1.7 var(--font);text-wrap:pretty}button,input,textarea,select{font:inherit}button{cursor:pointer;transition:background .16s,transform .16s}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:wait}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #80ac91;outline-offset:3px}button,a{-webkit-tap-highlight-color:transparent}h1,h2,p{margin:0}button{color:inherit}h1{letter-spacing:-1.5px;line-height:1.25}h2{font-size:22px;line-height:1.45}small{font-size:12px;color:var(--muted)}[hidden]{display:none!important}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:600;color:var(--muted)}.muted{color:var(--muted)}.primary{background:var(--green);color:white;border:0;border-radius:6px;padding:12px 20px;font-weight:600;min-height:46px}.primary:hover{background:var(--deep)}.outline{border:1px solid var(--line);border-radius:6px;background:white;padding:8px 15px;min-height:44px}.outline:hover{background:var(--mint)}.text-button{border:0;background:none;padding:6px 0;color:var(--muted)}.error{color:#a34129;font-size:13px;white-space:pre-wrap;margin:12px 0}.error:empty{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.login-shell{min-height:100vh;display:grid;grid-template-columns:1.15fr 1fr}.login-copy{background:var(--deep);color:#f5f6ef;padding:10vh clamp(35px,7vw,110px);display:flex;flex-direction:column;justify-content:center}.login-copy .eyebrow{color:#a7c3ad}.login-copy h1{font-size:clamp(35px,4vw,62px);margin:40px 0 24px;line-height:1.35}.login-copy>p:not(.eyebrow){max-width:380px;color:#b8cbbd;font-size:16px}.login-foot{font-size:12px;color:#b8cbbd;margin-top:70px}.login-form{align-self:center;padding:45px;max-width:440px;width:100%;margin:auto}.login-form h2{font-size:29px;margin:20px 0 14px}.login-form label,dialog label{display:block;font-size:13px;font-weight:600;margin:28px 0 8px}input,select{width:100%;border:1px solid var(--line);border-radius:6px;padding:12px;background:white;color:var(--ink)}.login-form .primary{width:100%;margin:18px 0;display:flex;justify-content:space-between}.login-form small{display:block}
.workspace{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:100vh}.sidebar{background:#edf0e7;border-right:1px solid var(--line);padding:35px 22px;display:flex;flex-direction:column;height:100vh;position:sticky;top:0}.brand>span{font-size:12px;letter-spacing:4px}.brand strong{font-size:24px;display:block;margin-top:4px;letter-spacing:1px}.beta{font-size:10px;font-weight:400;border:1px solid #bac9b8;border-radius:4px;padding:2px 5px;margin-left:10px;vertical-align:middle}.new-button{margin:32px 0 28px;background:white;border:1px solid #bdccbd;border-radius:6px;text-align:left;padding:11px 13px;font-weight:600}.new-button:hover{background:var(--mint)}.nav-label{font-size:11px;color:var(--muted);letter-spacing:1px;margin-bottom:12px}#history{overflow-y:auto;flex:1}#history button{display:block;width:100%;border:0;background:transparent;text-align:left;border-radius:6px;padding:10px;margin:3px 0;font-size:13px}#history button:hover,#history button.active{background:#dce5d6}#history button small{display:block;font-size:10px;margin-top:2px}.empty-history{font-size:12px;color:var(--muted);padding:14px 0}.sidebar-bottom{padding-top:20px;border-top:1px solid var(--line)}.sidebar-bottom small{display:block;margin-top:12px;font-size:10px}.sidebar-bottom p{font-size:13px}.topbar{height:72px;padding:0 4vw;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);font-size:13px}.status-chip{border:1px solid #cddbc9;background:#edf3e8;border-radius:30px;padding:7px 14px;font-size:11px}.status-chip span{margin-left:12px}.home{padding:44px 4vw 35px;max-width:1450px;margin:auto}.hero{margin-bottom:38px}.hero h1{font-size:clamp(32px,3.3vw,52px);margin:18px 0}.hero em{font-style:normal;color:var(--green)}.hero>p:last-child{font-size:14px;color:var(--muted);line-height:1.9}.modules{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.module{border:1px solid var(--line);background:white;padding:25px;text-align:left;border-radius:var(--radius);min-height:214px;display:flex;flex-direction:column}.module:hover{background:#eef4e9;transform:translateY(-2px)}.module-num{font-size:11px;letter-spacing:2px;color:var(--muted);margin-bottom:17px}.module h2{font-size:22px;margin-bottom:7px}.module p{font-size:13px;color:var(--muted)}.module-action{display:flex;justify-content:space-between;font-size:12px;margin-top:auto;padding-top:22px}.module-action b{font-size:20px;line-height:1}.featured{background:var(--deep);color:white;border-color:var(--deep)}.featured:hover{background:#20543f}.featured p,.featured .module-num{color:#bfd0bd}.ground-rule{border-top:1px solid var(--line);display:grid;grid-template-columns:105px 1fr;gap:6px;margin-top:34px;padding-top:22px;font-size:12px}.ground-rule p{color:var(--muted)}.ground-rule span{grid-column:2;color:var(--warn);font-size:11px}footer{font-size:10px;color:#8a958d;padding:12px 4vw 24px}
.training{padding:32px 4vw;max-width:1500px;margin:auto}.training-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px;gap:16px}.training-heading h1{font-size:26px;margin-top:9px;letter-spacing:-.6px}.training-grid{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:28px}.conversation{min-width:0}.practice-notes{padding:24px 0 0 20px;border-left:1px solid var(--line);align-self:start}.practice-notes h2{font-size:23px;margin:18px 0;line-height:1.5}.practice-notes ol{padding-left:18px;font-size:12px;color:var(--muted);line-height:2.3;margin-bottom:27px}.practice-notes .primary{font-size:12px;width:100%;padding:10px}#score-hint{font-size:11px;color:var(--muted);margin:15px 0 30px}.source-note{border-top:1px solid var(--line);padding-top:18px;font-size:11px;color:var(--muted)}.source-note strong,.source-note span{display:block;font-weight:400;margin-top:4px}#messages{min-height:180px;max-height:62vh;overflow:auto;padding-right:5px}.message{margin:0 0 20px}.message-label{font-size:11px;color:var(--muted);margin-bottom:7px;display:flex;justify-content:space-between}.message-body{font-size:14px;line-height:1.85;background:white;border:1px solid var(--line);padding:18px 20px;border-radius:9px;overflow-wrap:anywhere}.message.user{margin-left:38px}.message.user .message-body{background:#e7eedf;border-color:#d3dfc9}.message-body p{margin:5px 0 10px;white-space:pre-wrap}.message-body h3{font-size:16px;margin:12px 0 7px}.message-body ul{padding-left:22px}.message-body table{border-collapse:collapse;font-size:12px;width:100%;margin:12px 0}.message-body td,.message-body th{border:1px solid var(--line);padding:6px;text-align:left}.table-wrap{overflow:auto}.working{font-size:12px;color:var(--muted);display:flex;gap:10px;align-items:center;margin:20px 0}.dot{width:7px;height:7px;background:var(--green);border-radius:50%;animation:pulse 1.3s infinite}.conversation form{background:white;border:1px solid #bdcbbc;border-radius:9px;padding:14px;margin-top:16px}.conversation textarea{width:100%;resize:vertical;border:0;background:none;min-height:80px;font-size:14px;color:var(--ink);outline:none;line-height:1.8}.composer-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px}.composer-bottom span{font-size:10px;color:var(--muted)}.composer-bottom button{font-size:12px;padding:8px 15px;min-height:40px}.score-panel{margin-top:32px;padding-top:26px;border-top:1px solid var(--line)}.score-summary{display:flex;align-items:baseline;gap:15px;flex-wrap:wrap}.score-number{font-size:46px;letter-spacing:-2px;color:var(--green);font-weight:600}.score-number small{font-size:15px;letter-spacing:0}.score-panel>p{color:var(--muted);font-size:12px;margin:8px 0 24px}.score-panel details{border:1px solid var(--line);background:white;border-radius:8px;margin:10px 0;padding:14px 18px}.score-panel summary{cursor:pointer;font-weight:600;display:flex;justify-content:space-between}.criterion{font-size:13px;border-top:1px solid var(--line);padding:16px 0;margin-top:10px}.criterion strong{display:block;margin-bottom:7px}.criterion p{margin:5px 0}.criterion blockquote{margin:10px 0;padding:10px 13px;background:var(--canvas);font-size:12px}.criterion small{display:block}.feedback-text{margin-top:20px;padding:22px;background:#e7eedf;border-radius:8px}.feedback-text h3{font-size:15px}.feedback-text p{font-size:13px;margin:8px 0}.risk{color:#9b452b;background:#f8e8dd;padding:15px;margin:10px 0;border-radius:8px}.feedback-row{display:flex;justify-content:space-between;align-items:center;background:white;border:1px solid var(--line);padding:20px;margin-top:14px;border-radius:8px;gap:10px}.feedback-row p{font-size:13px}.feedback-row small{display:block}
dialog{border:1px solid var(--line);border-radius:14px;padding:34px;width:min(530px,calc(100% - 32px));color:var(--ink);background:var(--canvas);box-shadow:0 25px 100px #17352c33;max-height:85vh}dialog::backdrop{background:#17352c66;backdrop-filter:blur(3px)}dialog h2{font-size:25px;margin:15px 0}dialog p{font-size:13px;margin:15px 0}dialog .primary{width:100%;margin-top:20px}.dialog-close{position:absolute;right:12px;top:8px;border:0;background:none;font-size:26px;color:var(--muted);width:40px;height:40px}dialog li{font-size:12px;margin:6px 0}.connection-note{padding:15px;background:#eee7db;color:var(--warn);border-radius:7px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--deep);color:white;padding:12px 22px;border-radius:8px;font-size:13px;box-shadow:0 6px 30px #17352c22;max-width:90vw}
@keyframes pulse{50%{opacity:.25}}@media(min-width:1500px){.modules{grid-template-columns:repeat(4,minmax(0,1fr))}.module{min-height:260px}.hero{margin-bottom:55px}}@media(max-width:1050px){.workspace{grid-template-columns:200px minmax(0,1fr)}.sidebar{padding:28px 16px}.training-grid{grid-template-columns:1fr}.practice-notes{border-left:0;border-top:1px solid var(--line);padding:18px 0;display:flex;align-items:center;gap:18px;flex-wrap:wrap}.practice-notes h2,.practice-notes ol,.practice-notes .eyebrow{display:none}.practice-notes .primary{width:auto}#score-hint{margin:0;max-width:210px}.source-note{border:0;padding:0;margin-left:auto}.training-heading h1{font-size:22px}}@media(max-width:700px){.login-shell{grid-template-columns:1fr}.login-copy{padding:40px 28px}.login-copy h1{font-size:35px;margin:24px 0 18px}.login-foot{margin-top:30px}.login-form{padding:35px 28px}.workspace{display:block}.sidebar{position:relative;width:100%;height:auto;padding:18px 22px;display:grid;grid-template-columns:1fr auto;border-right:0;gap:10px}.brand strong{font-size:20px}.brand>span{font-size:10px}.new-button{margin:10px 0;font-size:12px}.nav-label,#history,.sidebar-bottom small{display:none}.sidebar-bottom{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;border:0;padding:0}.sidebar-bottom p{font-size:11px}.text-button{font-size:11px}.topbar{height:58px;padding:0 22px;font-size:11px}.status-chip{font-size:10px;padding:6px 10px}.home{padding:30px 22px}.hero h1{font-size:36px}.hero{margin-bottom:28px}.modules{gap:12px}.module{padding:18px;min-height:220px}.module h2{font-size:19px}.module p{font-size:12px}.ground-rule{grid-template-columns:1fr}.ground-rule span{grid-column:1}.training{padding:24px 20px}.training-heading h1{font-size:20px}#messages{max-height:58vh}.message.user{margin-left:20px}.message-body{padding:14px;font-size:14px}.composer-bottom span{display:none}.composer-bottom{justify-content:flex-end}.source-note{display:none}.score-summary{gap:10px}.score-number{font-size:38px}footer{padding:12px 22px 20px}.feedback-row{padding:14px}.hero .eyebrow{font-size:10px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}