/* finesse · register=product · A=warm-white+sage · B=system-CJK-600/400 · C=learning-shell · D=feedback-only · E=porcelain-and-slate */
:root{--ui-page:#f3f4ee;--ui-bg:#fbfcf7;--ui-inset:#e9ede3;--ui-ink:#26352d;--ui-body:#435649;--ui-muted:#657466;--ui-dim:#7b897d;--ui-accent:#3c594b;--ui-on:#fafcf5;--ui-soft:#e2eadd;--ui-border:rgba(53,75,57,.12);--ui-shadow:0 3px 12px rgba(42,67,45,.035);--ui-modal-shadow:0 28px 80px rgba(35,50,40,.17);--ui-error:#a04e43;--ui-warn:#826640;--ui-nav-w:220px;--ui-nav-h:72px;--ui-r:20px;--ui-r-sm:12px;--ui-font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
html,body{height:100%;overflow-x:clip}body{background:var(--ui-page)!important;color:var(--ui-ink);font-family:var(--ui-font);font-size:14px}*{box-sizing:border-box}button,a,input,textarea{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--ui-accent)!important;outline-offset:3px}button:active:not(:disabled){transform:translateY(1px)}button svg{flex-shrink:0}.hidden{display:none!important}h1,h2,h3{color:var(--ui-ink);min-width:0;overflow-wrap:anywhere}p{line-height:1.75}input,textarea{color:var(--ui-ink)!important;font-family:var(--ui-font);background:var(--ui-bg)!important}input::placeholder,textarea::placeholder{color:var(--ui-dim)!important}input:not([type=range]):not([type=file]),textarea{border-color:var(--ui-border)!important;border-radius:var(--ui-r-sm)!important}input[type=range]{accent-color:var(--ui-accent)}.ui-visually-hidden{display:none!important}
.ui-app{width:calc(100% - var(--ui-nav-w))!important;margin-left:var(--ui-nav-w)!important;max-width:none!important;height:100svh;background:var(--ui-page);isolation:isolate}.ui-side-nav{position:fixed;left:0;top:0;bottom:0;width:var(--ui-nav-w);background:var(--ui-bg);border-right:1px solid var(--ui-border);padding:33px 18px 23px;display:flex;flex-direction:column;z-index:70}.ui-side-brand{display:flex;gap:10px;align-items:center;padding:0 10px 30px;color:var(--ui-ink);text-decoration:none}.ui-side-brand img{width:28px;height:28px}.ui-side-brand>span{font-size:19px;letter-spacing:1px;font-weight:600}.ui-side-brand small{display:block;font-size:9px;font-weight:400;letter-spacing:2px;color:var(--ui-muted);margin-top:5px}.ui-nav-main{display:flex;flex-direction:column;gap:7px}.ui-nav-main button{display:flex;gap:12px;align-items:center;min-height:49px;padding:0 18px;border:0;border-radius:13px;background:transparent;color:var(--ui-muted);font-size:13px;font-family:var(--ui-font);text-align:left;white-space:nowrap}.ui-nav-main button svg{width:19px;height:19px;stroke-width:1.5}.ui-nav-main button[aria-current=page]{background:var(--ui-soft);color:var(--ui-accent);font-weight:600}.ui-nav-main button:hover{background:var(--ui-inset)}.ui-nav-bottom{margin-top:auto;text-align:center;padding:20px 8px 0;border-top:1px solid var(--ui-border)}.ui-nav-bottom img{width:90px;height:105px;object-fit:contain;margin:0 auto 9px;mix-blend-mode:multiply}.ui-nav-bottom strong{font-size:12px;font-weight:500}.ui-nav-bottom p{font-size:10px;color:var(--ui-muted);margin:7px 0 17px}.ui-demo-tag{font-size:9px;color:var(--ui-muted);background:var(--ui-inset);padding:6px 9px;border-radius:20px;white-space:nowrap}body:not(.ui-demo) .ui-demo-tag{display:none}.ui-home{background:var(--ui-page)!important}.ui-home-header{min-height:88px;max-width:1200px;width:calc(100% - 88px);margin:0 auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--ui-border)}.ui-home-brand{display:flex;gap:9px;align-items:center;font-size:16px;font-weight:600;color:var(--ui-ink);text-decoration:none}.ui-home-brand img{width:25px;height:25px}.ui-home-brand small{font-size:11px;font-weight:400;color:var(--ui-muted);margin-left:9px}.ui-home-account{display:flex;gap:7px;align-items:center;min-height:40px;padding:0 13px;background:var(--ui-bg);border:1px solid var(--ui-border);border-radius:22px;font-size:11px;color:var(--ui-muted)}.ui-home-account svg{width:16px;height:16px}.ui-home-scroll{padding:31px 44px 26px;max-width:1288px;width:100%;margin:auto;min-height:0;display:block!important}.ui-home-intro{display:grid;grid-template-columns:minmax(0,1fr) 260px;align-items:center;gap:25px;min-height:231px;padding:0 12px 25px}.ui-kicker{font-size:11px;color:var(--ui-accent);letter-spacing:1px}.home-title{font-size:clamp(28px,2.4vw,38px)!important;font-weight:600!important;line-height:1.45!important;letter-spacing:-1px;background:none!important;-webkit-text-fill-color:var(--ui-ink)!important;color:var(--ui-ink)!important;margin:13px 0 0!important;text-align:left!important}.ui-home-intro #home-subtitle{font-size:12px!important;color:var(--ui-muted)!important;margin-top:12px!important}.ui-home-intro #home-free-badge,.ui-home-intro #home-vip-hint{font-size:10px!important;border-color:var(--ui-border)!important;background:var(--ui-soft)!important;color:var(--ui-accent)!important;padding:6px 10px;border-radius:20px;white-space:nowrap}.ui-home-intro #home-vip-hint{background:transparent!important;color:var(--ui-muted)!important}.ui-intro-art{height:220px;text-align:center;position:relative}.ui-intro-art img{height:184px;width:175px;object-fit:contain;margin:auto;mix-blend-mode:multiply}.ui-intro-art span{font-size:10px;color:var(--ui-muted);display:block;margin-top:8px}.ui-start-grid{display:grid;grid-template-columns:1.22fr 1fr 1fr;gap:17px}.ui-start-card{background:var(--ui-bg);border:1px solid var(--ui-border);border-radius:var(--ui-r);box-shadow:var(--ui-shadow);padding:22px 24px;min-width:0;text-align:left;min-height:192px;display:flex;flex-direction:column;position:relative;overflow:hidden;transition:background .2s,border-color .2s}.ui-start-card:hover{border-color:var(--ui-accent)}.ui-start-lessons{background:var(--ui-accent);color:var(--ui-on);border-color:transparent}.ui-start-lessons:hover{background:var(--ui-ink)}.ui-start-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}.ui-card-icon{width:32px;height:32px;display:grid;place-items:center;border-radius:10px;background:var(--ui-inset);color:var(--ui-accent)}.ui-card-icon svg{width:19px;height:19px}.ui-start-lessons .ui-card-icon{background:rgba(241,246,229,.12);color:var(--ui-on)}.ui-card-num{font-size:10px;color:var(--ui-muted);font-variant-numeric:tabular-nums}.ui-start-lessons .ui-card-num{color:#c6d4c4}.ui-start-card strong{font-weight:600;font-size:18px;line-height:1.5}.ui-start-card p{font-size:11px;color:var(--ui-muted);line-height:1.9;margin-top:9px;max-width:240px}.ui-start-lessons p{color:#d2ddcf}.ui-start-foot{display:flex;align-items:center;justify-content:space-between;margin-top:21px;gap:15px;font-size:10px;color:var(--ui-muted)}.ui-start-foot svg{width:17px;height:17px}.ui-start-lessons .ui-start-foot{color:#d2ddcf}.ui-start-count{font-size:10px!important;font-weight:500!important;color:inherit!important}.ui-extra-label{font-size:14px;font-weight:500;color:var(--ui-ink);margin:29px 0 13px}.ui-question-card{border:1px solid var(--ui-border);border-radius:18px;background:var(--ui-bg);padding:15px 19px;box-shadow:var(--ui-shadow)}#home-input{min-height:79px;font-size:13px!important;line-height:1.8;padding:6px 0!important}#home-pick-image,#home-mic{font-size:11px;min-height:36px;color:var(--ui-muted)}#home-pick-image svg,#home-mic svg{width:17px;height:17px}.ui-plan-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:15px 4px;background:none;box-shadow:none;font-size:12px}.ui-plan-row .text-sm{font-size:11px;color:var(--ui-muted)}.ui-plan-row .text-xs{font-size:9px;color:var(--ui-muted);max-width:560px;line-height:1.8}.plan-switch{width:40px!important;height:24px!important;background:var(--ui-inset)!important;flex-shrink:0}.plan-switch .knob{height:18px!important;width:18px!important;top:3px!important;left:3px!important;box-shadow:0 1px 4px rgba(35,50,40,.13)}.plan-switch.on{background:var(--ui-accent)!important}.plan-switch.on .knob{transform:translateX(16px)!important}.btn-primary,.ach-continue,.intro-next{background:var(--ui-accent)!important;color:var(--ui-on)!important;box-shadow:none!important}.ui-ask-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-start;padding-top:5px}.ui-ask-submit{height:45px;min-width:156px;display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px;border:0;border-radius:13px}.ui-ask-submit svg{width:17px;height:17px}.ui-ask-submit .text-xs{font-size:9px}.ui-ask-actions #home-teach-hint{font-size:9px;color:var(--ui-muted);flex:1}.ui-offline-link{font-size:11px;display:flex;gap:6px;align-items:center;min-height:40px;color:var(--ui-muted)}.ui-offline-link svg{width:15px;height:15px}.ui-home-footer{padding:0 20px 7px!important;min-height:0}.ui-home-footer a,#screen-home footer a{font-size:9px!important;color:var(--ui-dim)!important}.ui-home footer{font-size:9px!important;padding-bottom:10px!important;color:var(--ui-dim)}
.ui-screen{background:var(--ui-page)!important;position:fixed!important;left:var(--ui-nav-w)!important;top:0!important;right:0!important;width:calc(100% - var(--ui-nav-w))!important;height:100svh;z-index:40}.ui-intro-art img,.ui-nav-bottom img{-webkit-mask-image:radial-gradient(ellipse at center,black 45%,transparent 80%);mask-image:radial-gradient(ellipse at center,black 45%,transparent 80%)}.ui-screen-header{background:var(--ui-bg)!important;display:flex;align-items:center;gap:13px;height:73px;min-height:73px;padding:0 30px;border-bottom:1px solid var(--ui-border);position:sticky;top:0;z-index:20}.ui-screen-header>h1{font-size:20px;font-weight:600;line-height:1.4}.ui-screen-header .icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:var(--ui-page);color:var(--ui-muted);flex:none}.ui-screen-header .icon-btn svg{width:19px;height:19px}.report-btn,#tsumego-report-btn{display:flex;align-items:center;justify-content:center;gap:7px;padding:0 12px;height:36px;min-height:36px;border:1px solid var(--ui-border);border-radius:20px;background:var(--ui-bg)!important;color:var(--ui-muted)!important;font-size:11px;white-space:nowrap}.report-btn svg,#tsumego-report-btn svg{width:15px;height:15px}.ui-screen-content{max-width:1240px;width:100%;margin:0 auto;padding:26px 36px!important}.ui-section-note{font-size:11px;color:var(--ui-muted);margin:20px 0}.overview-card{padding:25px 28px;border:1px solid var(--ui-border);border-radius:20px;background:var(--ui-bg)!important;box-shadow:var(--ui-shadow);margin-bottom:22px}.ov-title{color:var(--ui-muted);font-size:11px}.ov-count{font-size:35px;color:var(--ui-ink);font-weight:600}.ov-level{background:var(--ui-inset)!important;color:var(--ui-accent)!important;border-color:var(--ui-border)!important}.ov-level-name{font-size:11px;color:var(--ui-muted)}.ov-bar{background:var(--ui-inset)!important;height:5px!important}.ov-bar-fill,#teach-progress-fill{background:var(--ui-accent)!important}.ov-hint{color:var(--ui-muted)!important;font-size:11px}.ov-hint-row{background:none!important;border:0!important;padding:8px 0!important}.ov-avatar{width:29px!important;height:29px!important;background:var(--ui-bg)!important}.ov-avatar img{object-fit:contain!important}#ov-continue{width:auto!important;padding:0 20px;border-radius:12px!important;background:var(--ui-accent)!important;min-height:44px;font-size:12px}#ov-continue-label{font-size:11px}#lessons-vip-bar{background:var(--ui-soft)!important;border-color:var(--ui-border)!important;color:var(--ui-accent)!important;min-height:44px;font-size:11px}#lessons-subtitle{font-size:11px;color:var(--ui-muted);line-height:1.8}.level-card{border:1px solid var(--ui-border);border-radius:var(--ui-r);background:var(--ui-bg);padding:22px;margin-bottom:18px;box-shadow:var(--ui-shadow)}.level-title{font-size:17px;gap:11px}.level-title .num{background:var(--ui-soft)!important;color:var(--ui-accent)!important;border-radius:9px!important;min-width:32px;min-height:30px;font-size:11px}.level-title h3{font-size:17px;font-weight:600}.level-brief{font-size:11px;color:var(--ui-muted);margin:10px 0 19px}.lesson-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.lesson-tile{background:var(--ui-bg)!important;border:1px solid var(--ui-border)!important;border-radius:14px;padding:17px;box-shadow:none!important;min-width:0;min-height:129px}.lesson-tile:hover:not(:disabled){background:var(--ui-page)!important;border-color:var(--ui-accent)!important}.lesson-tile.passed{background:var(--ui-soft)!important}.lesson-tile.planned{opacity:.48}.tile-emoji{font-size:17px;color:var(--ui-accent);width:22px;height:22px}.tile-emoji svg{width:20px;height:20px}.tile-head{justify-content:space-between!important;gap:9px}.tile-idx{font-size:9px;color:var(--ui-muted)}.tile-title{font-size:13px;color:var(--ui-ink)!important;font-weight:500;line-height:1.65;margin-top:14px;white-space:normal}.tile-meta{font-size:9px;margin-top:10px;color:var(--ui-muted)}.tile-free{color:var(--ui-accent)!important;background:var(--ui-soft)!important;border-radius:5px}.tile-star,.tile-lock{color:var(--ui-accent)!important;right:12px;top:12px}.lesson-tile .tile-head{padding-right:20px}.tile-lock{width:12px;height:12px}
#tsumego-hub{max-width:1000px;padding:26px 36px!important}#tsu-daily-card,#tsu-free-btn,#tsu-wrong-btn{border-color:var(--ui-border)!important;border-radius:18px;background:var(--ui-bg)!important;box-shadow:var(--ui-shadow)!important;color:var(--ui-ink);padding:20px 23px;min-height:92px}#tsu-daily-card{background:var(--ui-soft)!important}#tsu-daily-card span,#tsu-wrong-btn span{color:inherit!important}.ui-feature-icon{width:42px;height:42px;display:grid;place-items:center;background:var(--ui-inset);color:var(--ui-accent);border-radius:13px;flex:none}.ui-feature-icon svg{width:21px;height:21px}#tsu-tiers{gap:14px;grid-template-columns:repeat(3,minmax(0,1fr))}#tsu-tiers>button{border:1px solid var(--ui-border)!important;border-top:1px solid var(--ui-border)!important;background:var(--ui-bg)!important;border-radius:16px;box-shadow:var(--ui-shadow)!important;padding:20px}#tsu-tiers>button [style*="color"]{color:var(--ui-accent)!important}#tsu-tiers>button .text-xl{font-size:15px;color:var(--ui-accent)}#tsu-tiers>button .bg-gray-100{background:var(--ui-inset)!important;height:4px}#tsu-tiers>button .bg-gray-100>div{background:var(--ui-accent)!important}#tsu-tiers>button .font-bold{font-weight:500;font-size:14px}#tsu-tiers>button .text-gray-500{font-size:10px;color:var(--ui-muted)}#tsu-tiers>button .text-gray-400{font-size:9px;color:var(--ui-muted)}#tsumego-levels{max-width:950px;width:100%;margin:auto;padding:25px 36px}.lesson-chip,.provider-chip{background:var(--ui-bg)!important;border:1px solid var(--ui-border)!important;border-radius:12px!important;color:var(--ui-muted)!important;min-height:36px;font-size:11px;padding:7px 12px}.lesson-chip.active,.provider-chip.active{background:var(--ui-soft)!important;border-color:var(--ui-accent)!important;color:var(--ui-accent)!important}.provider-chip .dot{background:var(--ui-accent)!important}#tsumego-practice{max-width:950px;width:100%;margin:auto;min-height:0}#tsumego-scroll{padding:20px 36px}#tsumego-filters{padding:8px 0 16px;background:none!important;border-color:var(--ui-border)}#tsumego-prompt{font-size:13px;font-weight:500;color:var(--ui-body)!important;text-align:left;padding:14px 4px 17px;line-height:1.8}#tsumego-board{width:100%;max-width:610px;margin:auto;min-height:0;padding-top:0}.aixue-go{border-radius:17px;overflow:visible;box-shadow:0 15px 38px rgba(43,59,46,.10)}.aixue-go>svg{border-radius:17px;max-width:100%;height:auto}.aixue-go button{min-height:36px;border-radius:11px!important;border-color:var(--ui-border)!important;font-size:11px!important;color:var(--ui-body)!important;background:var(--ui-bg)!important}.aixue-go button[data-level][style*="#F2843C"],.aixue-go button[data-level][style*="700"]{background:var(--ui-soft)!important;color:var(--ui-accent)!important}.aixue-go [data-eval-slot]{font-size:10px!important;color:var(--ui-muted)!important}#tsumego-practice>div:last-child{background:var(--ui-page)!important;border-top:1px solid var(--ui-border);padding:14px 36px}.ui-screen #tsumego-next{background:var(--ui-accent)!important;color:var(--ui-on)!important}.ui-screen #tsumego-prev,.ui-screen #tsumego-solution{color:var(--ui-accent);border-color:var(--ui-border);background:var(--ui-bg);font-size:12px;border-radius:12px}#tsumego-next{font-size:12px;border-radius:12px}
.ui-play-content{max-width:1190px;width:100%;margin:0 auto;padding:25px 36px 35px;position:relative}.ui-play-controls{display:flex;align-items:center;gap:20px;margin-bottom:17px}.ui-play-controls>div{display:flex;gap:6px}.ui-play-controls button{height:36px;min-width:48px;padding:0 13px;border-radius:11px!important;font-size:11px!important;border:1px solid var(--ui-border)!important;background:var(--ui-bg)!important;color:var(--ui-muted)!important;white-space:nowrap}.ui-play-controls button[data-ui-active=true]{background:var(--ui-accent)!important;color:var(--ui-on)!important;border-color:transparent!important}#play-hint{font-size:12px;color:var(--ui-muted)!important;max-width:660px;line-height:1.8}#play-board{max-width:575px;margin:20px auto 0;padding:0}.ui-play-content>div:not(.ui-play-controls):not(#play-board){max-width:575px;margin-left:auto;margin-right:auto}#play-replay,#play-restart{font-size:12px!important;border-radius:12px!important;min-height:45px;border-color:var(--ui-border)!important}#play-replay{background:var(--ui-bg)!important;color:var(--ui-accent)!important}#play-restart{background:var(--ui-accent)!important;color:var(--ui-on)!important}#play-replay-bar{background:var(--ui-bg)!important;border-color:var(--ui-border)!important;border-radius:16px}.rp-btn{border-color:var(--ui-border)!important;background:var(--ui-inset)!important;color:var(--ui-accent)!important;display:grid;place-items:center}.rp-btn svg{width:17px;height:17px}#play-replay-step{color:var(--ui-ink)!important;font-size:12px}
#screen-teach{background:var(--ui-page)!important;left:var(--ui-nav-w)!important;width:calc(100% - var(--ui-nav-w))!important;z-index:50}#screen-teach>header{height:70px;min-height:70px;padding:0 26px;background:var(--ui-bg)!important;border-color:var(--ui-border);gap:10px}#teach-title{font-size:15px;font-weight:500;margin-left:4px;color:var(--ui-ink)}#screen-teach .icon-btn{background:var(--ui-inset);border-radius:11px;margin-left:5px;color:var(--ui-muted)}#screen-teach .icon-btn svg{width:18px;height:18px}#screen-teach .teach-avatar{margin:0}#question-aside{background:var(--ui-bg);border:1px solid var(--ui-border);box-shadow:var(--ui-shadow);border-radius:18px;width:250px;margin:22px 0 22px 22px;padding:18px}.qa-title{font-size:12px!important;color:var(--ui-muted)!important}.qa-text{font-size:13px!important;color:var(--ui-body)!important}#blackboard-content{background:var(--ui-page)!important;padding:22px!important}.bb-board{background:var(--ui-bg)!important;color:var(--ui-ink);border:1px solid var(--ui-border);border-radius:20px;box-shadow:var(--ui-shadow)!important}#teach-narration{background:var(--ui-soft)!important;border:1px solid var(--ui-border);border-radius:14px;margin:0 24px 10px!important;padding:12px 17px!important}.narr-line{font-size:12px!important;color:var(--ui-body)!important}.narr-line.is-meta{color:var(--ui-accent)!important}.narr-line.is-error{color:var(--ui-error)!important}#teach-followup{padding:3px 24px 13px!important}#followup-input{font-size:13px;border-radius:13px!important;background:var(--ui-bg)!important;border:1px solid var(--ui-border);min-height:44px}#followup-send{border-radius:13px!important;height:44px;width:44px}#followup-send svg{width:19px;height:19px}#followup-chips{padding:3px 24px 10px!important}#followup-chips button{font-size:10px;background:var(--ui-bg)!important;border-color:var(--ui-border)!important;color:var(--ui-muted)!important}#settings-panel{top:68px;background:var(--ui-bg);border-color:var(--ui-border);box-shadow:var(--ui-modal-shadow);border-radius:16px;z-index:85}#thinking-overlay{background:var(--ui-page)!important;top:70px}#thinking-overlay img{width:180px;height:180px;object-fit:contain;border-radius:50%;mix-blend-mode:multiply}.set-row label,.set-row .val{color:var(--ui-muted)!important}#resume-play-btn{background:var(--ui-soft)!important;color:var(--ui-accent)!important;border-color:var(--ui-border)!important;font-size:12px}
#screen-mine .ui-screen-content{max-width:950px;padding-top:31px!important}#mine-account,#mine-vip{background:var(--ui-bg)!important;border:1px solid var(--ui-border)!important;border-radius:20px;padding:22px!important;box-shadow:var(--ui-shadow);min-height:100px}.ui-feature-icon{border:none!important}#mine-vip{background:var(--ui-soft)!important}#mine-vip>div:first-child{background:var(--ui-bg)!important;border:none!important;color:var(--ui-accent)!important;font-size:13px;letter-spacing:1px}#mine-vip-title,#mine-vip-sub{color:var(--ui-accent)!important}#mine-email,#mine-vip-title{font-size:16px}#mine-email-sub,#mine-vip-sub{font-size:11px;line-height:1.8}#mine-login-btn,#mine-upgrade-btn,#mine-change-pwd{background:var(--ui-accent)!important;color:var(--ui-on)!important;border-radius:11px!important;min-height:40px;font-size:11px;padding:0 15px;white-space:nowrap}#mine-logout-btn{font-size:11px;min-height:38px;border-color:var(--ui-border);color:var(--ui-muted)}#mine-usage{line-height:2.8;color:var(--ui-muted);font-size:12px}#screen-mine .border-gray-100{border:1px solid var(--ui-border)!important;background:var(--ui-bg);border-radius:18px;padding:20px!important}#screen-mine .text-sm.font-semibold{font-size:13px;color:var(--ui-ink)}#mine-logged-only input{font-size:12px;min-height:44px}.aixue-modal .card,#login-modal>div,#paywall-modal>div{background:var(--ui-bg)!important;border:1px solid var(--ui-border);border-radius:24px!important;box-shadow:var(--ui-modal-shadow)}.aixue-modal .card h2{font-size:20px}.aixue-modal .report-sub{color:var(--ui-muted);font-size:12px}.stat-tile{background:var(--ui-inset)!important;border-color:var(--ui-border);border-radius:14px}.stat-tile .num{color:var(--ui-accent)!important}.stat-tile .label{color:var(--ui-muted)!important}.intro-card{padding:26px!important}.intro-h{font-size:21px!important}.intro-p{font-size:13px!important;color:var(--ui-muted)!important}.intro-dot.active{background:var(--ui-accent)!important}.ach-star,.ach-title{color:var(--ui-accent)!important}.ach-lesson,.ach-stat .num{color:var(--ui-ink)!important}.ach-stat .label{color:var(--ui-muted)!important}.ach-actions button{font-size:12px;border-radius:13px}.ach-back,.ach-share{background:var(--ui-inset)!important;color:var(--ui-muted)!important;border-color:var(--ui-border)!important}#login-submit,#paywall-redeem,#ach-upgrade{background:var(--ui-accent)!important;color:var(--ui-on)!important;border-radius:12px!important}#login-modal input,#paywall-modal input{min-height:44px;font-size:12px}#login-title,#paywall-modal .font-bold{font-size:20px}.close-btn,#login-close,#paywall-close{min-height:36px;min-width:36px;color:var(--ui-muted);display:grid;place-items:center}#paywall-plans>button,#paywall-modal [style*="FFF9F0"]{background:var(--ui-soft)!important;border-color:var(--ui-border)!important;color:var(--ui-ink)!important}#paywall-plans [style*="color"],#paywall-modal [style*="color:#b4681d"]{color:var(--ui-accent)!important}#error-toast>div{background:var(--ui-error)!important}.ui-demo-banner{position:fixed;right:17px;bottom:15px;z-index:95;font-size:9px;color:var(--ui-muted);border:1px solid var(--ui-border);border-radius:20px;padding:6px 11px;background:var(--ui-bg);pointer-events:none}.ui-class-demo{height:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:55px;align-items:center;padding:48px 70px}.ui-class-copy h2{font-size:33px;line-height:1.5;letter-spacing:-1px;margin-bottom:22px}.ui-class-copy p{font-size:15px;color:var(--ui-muted);line-height:1.9;margin-bottom:18px}.ui-class-copy .ui-rule{background:var(--ui-soft);color:var(--ui-accent);border-radius:13px;padding:15px 18px;font-size:13px}.ui-class-board{min-width:0;display:flex;justify-content:center}.ui-class-board .aixue-go{max-width:100%;box-shadow:none}.ui-class-board svg{max-width:100%;height:auto}.ui-class-copy small{display:block;margin-top:21px;color:var(--ui-muted);font-size:11px}
@media(min-width:1300px){.ui-play-content{padding-right:330px}.ui-play-content:after{content:"把学过的新招，放进一盘棋里。\A\A 你执黑棋，AI 执白棋。\A 点交叉点落子，观察棋子的气。\A\A 随时复盘，也可以问问小棋。";white-space:pre-line;position:absolute;right:35px;top:113px;width:245px;padding:25px;background:var(--ui-bg);border:1px solid var(--ui-border);border-radius:20px;font-size:12px;line-height:1.9;color:var(--ui-muted)}.ui-play-content #play-board{margin-left:0}.ui-play-content>div:not(.ui-play-controls):not(#play-board){margin-left:0}}
@media(max-width:1199px){:root{--ui-nav-w:185px}.ui-side-nav{padding:28px 12px 21px}.ui-side-brand{padding:0 7px 26px}.ui-side-brand>span{font-size:17px}.ui-nav-main button{padding:0 13px;gap:10px;font-size:12px}.ui-home-header{width:calc(100% - 52px);min-height:76px}.ui-home-scroll{padding:26px}.ui-home-intro{grid-template-columns:minmax(0,1fr) 190px;min-height:220px}.ui-intro-art{height:190px}.ui-intro-art img{height:158px;width:150px}.home-title{font-size:30px!important}.ui-start-grid{gap:12px}.ui-start-card{padding:19px 20px;min-height:190px}.ui-start-card strong{font-size:16px}.ui-start-card p{font-size:10px}.ui-screen-content,#tsumego-hub{padding:22px 26px!important}.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.ui-play-content{padding:24px 26px}.ui-screen-header{padding:0 23px}.ui-class-demo{padding:33px 40px;gap:35px}.ui-class-copy h2{font-size:29px}.ui-class-copy p{font-size:14px}.ui-class-copy .ui-rule{font-size:12px}}
@media(max-width:849px){:root{--ui-nav-w:0px;--ui-nav-h:68px}.ui-app{width:100%!important;margin:0!important;height:100svh;padding-bottom:calc(var(--ui-nav-h) + env(safe-area-inset-bottom))}.ui-side-nav{top:auto;bottom:0;width:100%;height:calc(var(--ui-nav-h) + env(safe-area-inset-bottom));padding:5px 12px calc(5px + env(safe-area-inset-bottom));border-right:0;border-top:1px solid var(--ui-border);flex-direction:row;align-items:stretch;background:var(--ui-bg)}.ui-side-brand,.ui-nav-bottom{display:none}.ui-nav-main{width:100%;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}.ui-nav-main button{flex-direction:column;justify-content:center;gap:3px;min-height:56px;padding:5px 0;font-size:9px;border-radius:12px;line-height:1.5}.ui-nav-main button svg{width:20px;height:20px}.ui-home,.ui-screen{height:calc(100svh - var(--ui-nav-h) - env(safe-area-inset-bottom))!important}.ui-home-header{width:calc(100% - 44px);min-height:68px}.ui-home-brand{font-size:15px}.ui-home-brand small{font-size:10px}.ui-home-scroll{padding:24px 22px 25px}.ui-home-intro{grid-template-columns:minmax(0,1fr) 140px;gap:16px;min-height:177px;padding:0 0 20px}.ui-kicker{font-size:10px}.home-title{font-size:27px!important;line-height:1.55!important;margin-top:10px!important;max-width:330px}.ui-intro-art{height:158px}.ui-intro-art img{height:132px;width:123px}.ui-intro-art span{font-size:8px;margin-top:3px}.ui-home-intro #home-subtitle{font-size:10px!important;margin-top:8px!important}.ui-home-intro #home-free-badge,.ui-home-intro #home-vip-hint{font-size:9px!important;padding:4px 8px}.ui-home-intro .mt-3.flex{flex-wrap:wrap;gap:5px}.ui-start-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.ui-start-card{padding:18px;min-height:175px}.ui-start-top{margin-bottom:16px}.ui-start-card p{font-size:10px}.ui-start-card strong{font-size:15px}.ui-start-foot{margin-top:15px}.ui-extra-label{font-size:13px;margin-top:24px}.ui-screen-header{height:65px;min-height:65px;padding:0 19px;gap:9px}.ui-screen-header>h1{font-size:17px}.ui-screen-header .icon-btn{height:36px;width:36px}.ui-screen-content,#tsumego-hub{padding:20px 22px!important}.ui-demo-banner{right:13px;bottom:calc(76px + env(safe-area-inset-bottom));font-size:8px;padding:5px 8px}.ui-play-controls{gap:8px}.ui-play-controls button{min-width:41px;padding:0 9px;font-size:10px!important}.ui-play-controls #play-levels{margin-left:auto}.ui-play-content{padding:20px 22px 35px}#screen-teach{left:0!important;width:100%!important;height:calc(100svh - var(--ui-nav-h) - env(safe-area-inset-bottom))!important}#screen-teach>header{height:60px;min-height:60px;padding:0 15px;gap:7px}#screen-teach .icon-btn{width:33px;height:33px;margin-left:3px}#teach-title{font-size:12px}#blackboard-content{padding:14px!important}#teach-narration{margin:0 15px 8px!important;padding:10px 13px!important}#teach-followup{padding:3px 15px 10px!important}#screen-teach .teach-avatar{width:28px;height:28px}#screen-teach .teach-avatar img{width:28px!important;height:28px!important}.ui-class-demo{padding:31px 42px;gap:30px}.ui-class-copy h2{font-size:28px}.ui-class-copy p{font-size:13px}.ui-class-copy .ui-rule{padding:12px;font-size:11px}.ui-class-copy small{font-size:10px}.ui-app>section #home-free-badge{white-space:normal}}
@media(max-width:599px){.ui-home-scroll{padding:22px 19px 24px}.ui-home-intro{grid-template-columns:minmax(0,1fr) 106px;gap:9px;min-height:173px}.home-title{font-size:25px!important;max-width:205px;line-height:1.5!important}.ui-home-brand small{display:none}.ui-home-header{width:calc(100% - 38px)}.ui-intro-art{height:148px}.ui-intro-art img{height:132px;width:112px}.ui-intro-art span{font-size:7px;line-height:1.5;white-space:nowrap}.ui-home-intro #home-subtitle{font-size:9px!important;max-width:205px;line-height:1.9}.ui-home-intro #home-free-badge,.ui-home-intro #home-vip-hint{font-size:8px!important;padding:4px 7px}.ui-home-intro #home-vip-hint{display:none}.ui-start-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.ui-start-lessons{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) 30px;min-height:150px;padding:22px;align-items:start}.ui-start-lessons .ui-start-top{grid-column:2;grid-row:1/4;flex-direction:column;gap:42px;margin:0}.ui-start-lessons strong{grid-column:1;grid-row:1;font-size:21px}.ui-start-lessons p{grid-column:1;grid-row:2;margin-top:6px;max-width:240px;font-size:11px}.ui-start-lessons .ui-start-foot{grid-column:1;grid-row:3;margin-top:13px;justify-content:flex-start;gap:28px}.ui-start-lessons .ui-start-foot svg{width:14px}.ui-start-tsumego,.ui-start-play{min-height:160px;padding:18px}.ui-start-top{margin-bottom:14px}.ui-card-icon{width:30px;height:30px;border-radius:10px}.ui-card-icon svg{width:18px;height:18px}.ui-start-card strong{font-size:15px}.ui-start-card p{font-size:10px;line-height:1.8}.ui-start-foot{font-size:9px;margin-top:11px}.ui-start-count{font-size:9px!important}.ui-extra-label{margin-top:24px;margin-bottom:12px;font-size:12px}.ui-question-card{padding:12px 14px;border-radius:16px}#home-input{min-height:77px;font-size:12px!important}#home-pick-image{font-size:10px}#home-pick-image svg{height:15px;width:15px}.ui-plan-row{gap:14px;padding:13px 2px}.ui-plan-row .text-sm{font-size:10px}.ui-plan-row .text-xs{font-size:8px}.ui-ask-actions{gap:7px 11px;padding-top:0}.ui-ask-submit{height:43px;min-width:135px;font-size:12px;border-radius:12px}.ui-ask-submit .text-xs{font-size:8px}.ui-offline-link{font-size:10px}.ui-ask-actions #home-teach-hint{flex-basis:100%;order:3;font-size:8px}.ui-home-footer{padding-bottom:4px!important}.ui-home-footer a,#screen-home footer a{font-size:8px!important}.ui-screen-header>h1{font-size:15px}.ui-screen-header{gap:7px;padding:0 15px;min-height:61px;height:61px}.report-btn{font-size:9px;padding:0 9px;height:34px;min-height:34px;gap:5px}.report-btn svg{width:14px;height:14px}.ui-screen-content,#tsumego-hub{padding:17px 18px!important}.overview-card{padding:20px;border-radius:18px;margin-bottom:16px}.ov-count{font-size:30px}.ov-title{font-size:10px}.ov-level-name{font-size:10px}.ov-hint{font-size:10px}.ov-unit{font-size:10px}#ov-continue{font-size:11px;width:100%!important;min-height:42px;height:auto;padding:10px 12px;flex-wrap:wrap;gap:3px}#ov-continue-label{font-size:9px}.ov-count .ov-slash{font-size:20px}#lessons-subtitle{font-size:10px;line-height:1.9}#lessons-vip-bar{font-size:10px;min-height:40px}.level-card{padding:17px;border-radius:18px;margin-bottom:15px}.level-title h3{font-size:15px}.level-title .num{font-size:9px;min-height:28px;min-width:30px}.level-brief{font-size:10px;margin-bottom:15px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.lesson-tile{padding:14px;min-height:126px;border-radius:12px}.tile-title{font-size:12px;line-height:1.65;margin-top:12px}.tile-idx{font-size:8px}.tile-meta{font-size:8px}.tile-star{font-size:12px}#tsu-tiers{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}#tsu-tiers>button{padding:16px;min-height:120px;border-radius:15px}#tsu-tiers>button .font-bold{font-size:12px}#tsu-tiers>button .text-xl{font-size:14px}#tsu-tiers>button .text-gray-400{font-size:8px}#tsu-tiers>button .text-gray-500{font-size:9px}#tsu-daily-card,#tsu-free-btn,#tsu-wrong-btn{padding:17px;min-height:87px;border-radius:16px}.ui-feature-icon{width:37px;height:37px;border-radius:12px}.ui-feature-icon svg{width:19px;height:19px}#tsumego-hub .font-bold{font-size:13px}#tsumego-hub .text-gray-400{font-size:10px}#tsu-daily-sub,#tsu-wrong-sub{font-size:10px}.ui-play-content{padding:17px 18px 27px}.ui-play-controls{flex-wrap:wrap;gap:9px;margin-bottom:14px}.ui-play-controls button{height:34px;min-width:41px;font-size:10px!important}#play-hint{font-size:10px;line-height:1.9}#play-board{margin-top:15px}.aixue-go{border-radius:14px}.aixue-go>svg{border-radius:14px}.aixue-go button{min-height:35px;padding:5px 9px!important;font-size:10px!important}.aixue-go [data-eval-slot]{font-size:9px!important}#play-quota{font-size:9px!important;padding:0!important}#play-replay,#play-restart{font-size:11px!important}#tsumego-scroll{padding:13px 12px}#tsumego-prompt{font-size:11px;padding:12px 5px;line-height:1.9}.lesson-chip{font-size:10px;padding:6px 10px;min-height:33px}#tsumego-practice>div:last-child{padding:12px 18px}#tsumego-prev,#tsumego-solution,#tsumego-next{font-size:11px!important;border-radius:11px}.ui-class-demo{display:flex;flex-direction:column;padding:31px 45px;gap:17px;justify-content:center}.ui-class-copy{width:100%}.ui-class-copy h2{font-size:32px;line-height:1.4;margin-bottom:13px}.ui-class-copy p{font-size:15px;line-height:1.9;margin-bottom:14px}.ui-class-copy .ui-rule{font-size:14px;padding:13px}.ui-class-copy small{display:none}.ui-class-board{width:100%;max-width:480px;margin:auto;flex:1;min-height:0}.ui-class-board .aixue-go{height:100%;display:flex;align-items:center}.ui-class-board svg{max-height:100%;width:auto}#screen-teach>header{padding:0 10px;gap:4px;height:57px;min-height:57px}#screen-teach .icon-btn{width:29px;height:32px;margin-left:2px}#screen-teach .icon-btn svg{width:16px;height:16px}#teach-title{font-size:10px;max-width:123px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#blackboard-content{padding:10px!important}.narr-line{font-size:11px!important}#teach-narration{margin:0 11px 8px!important;padding:10px 12px!important}#teach-followup{padding:3px 11px 10px!important}#followup-input{font-size:11px}#followup-send{height:40px;width:40px;border-radius:12px!important}#screen-mine .ui-screen-content{padding:20px 18px!important}#mine-account,#mine-vip{padding:18px!important;border-radius:18px;flex-wrap:wrap;gap:12px;min-height:109px}#mine-email,#mine-vip-title{font-size:13px}#mine-email-sub,#mine-vip-sub{font-size:10px}#mine-login-btn,#mine-upgrade-btn,#mine-change-pwd{font-size:10px;padding:0 11px;min-height:36px}#mine-usage{font-size:11px;line-height:3}#screen-mine .border-gray-100{padding:18px!important}.ui-demo-banner{font-size:7px}.ui-nav-main button{font-size:8px}.ui-home-brand{font-size:16px}.ui-class-demo{background:var(--ui-bg)}}
@media(max-width:359px){.ui-home-intro{grid-template-columns:minmax(0,1fr) 80px}.home-title{font-size:22px!important;max-width:185px}.ui-intro-art img{height:108px;width:86px}.ui-intro-art span{display:none}.ui-home-header{min-height:63px}.ui-home-scroll{padding:19px 15px}.ui-start-tsumego,.ui-start-play{padding:15px}.ui-start-card p{font-size:9px}.ui-home-account{font-size:9px;min-height:35px;padding:0 10px}.ui-screen-header>h1{font-size:13px}.ui-screen-header{padding:0 11px}.report-btn{font-size:8px;padding:0 8px}.ui-screen-content,#tsumego-hub{padding:14px 15px!important}.level-card{padding:14px}.lesson-tile{padding:12px}.tile-title{font-size:11px}.ui-play-content{padding:15px}.ui-play-controls button{font-size:9px!important;padding:0 8px}.ui-play-controls{gap:7px}.ui-class-demo{padding:22px 30px}.ui-class-copy h2{font-size:30px}.ui-class-copy p{font-size:14px}.ui-class-copy .ui-rule{font-size:12px}#teach-title{max-width:105px}.ui-nav-main button{font-size:8px;gap:4px}}
.tile-idx{background:var(--ui-bg)!important;border:1px solid var(--ui-border)!important;color:var(--ui-muted)!important}.lesson-tile.passed .tile-idx{background:var(--ui-soft)!important;color:var(--ui-accent)!important}.lesson-tile.planned .tile-idx{color:var(--ui-muted)!important}#tsu-tiers .text-xl svg{width:19px;height:19px}.ui-class-board .aixue-go{box-shadow:none!important}#tsu-wrong-count,#tsu-daily-streak{background:var(--ui-soft)!important;color:var(--ui-accent)!important}#screen-teach>header{justify-content:flex-start!important}#teach-title{margin-right:auto}.home-title br{display:none}@media(max-width:599px){.home-title br{display:block}.ui-home-intro .home-title{max-width:218px!important;font-size:24px!important;letter-spacing:-1px}}
/* 手机课堂保持棋盘为中心，不压缩到一张难读的小幻灯片。 */
@media(max-width:599px){body.ui-demo .bb-board{aspect-ratio:auto;height:100%;min-height:0}body.ui-demo .bb-board #root{position:relative;width:100%;height:100%;transform:none}body.ui-demo .ui-class-demo{width:100%!important;height:100%!important;padding:21px 22px;gap:15px;display:flex;flex-direction:column}body.ui-demo .ui-class-copy h2{font-size:21px;line-height:1.4;margin:0 0 9px}body.ui-demo .ui-class-copy h2 br{display:none}body.ui-demo .ui-class-copy p{font-size:11px;line-height:1.8;margin-bottom:10px}body.ui-demo .ui-class-copy .ui-rule{font-size:10px;padding:8px 11px}body.ui-demo .ui-class-board{display:flex;align-items:center;justify-content:center;flex:1;min-height:0}body.ui-demo .ui-class-board .aixue-go{display:block;height:auto;width:100%}body.ui-demo .ui-class-board svg{width:100%;max-height:none;height:auto}body.ui-demo #blackboard-content{overflow-y:auto}.ui-start-lessons{min-height:146px}.home-title{font-size:24px!important;max-width:200px}#screen-teach>header{justify-content:flex-start!important}#teach-title{margin-right:auto}.ui-screen-header{z-index:20}.ui-side-nav{z-index:70}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}.skeleton-line,.skeleton-dot{animation:none!important}.fade-up{animation:none!important}button:active{transform:none}}

/* 课后练习入口：目录页顶部现在有两个 .report-btn（学习报告 / 课后练习），
   默认 flex-shrink:1 会把按钮和里面的文字一起挤窄（文字溢出圆角边框），
   所以按钮与文字都设 flex:none；标题改省略号，不再把布局撑破。 */
.report-btn{flex:none!important}
.report-btn>span{flex:none!important}
.ui-screen-header>h1{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}