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@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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components;@layer utilities{.start{inset-inline-start:var(--spacing)}.inline{display:inline}.table{display:table}}:root{--cream:#fffaf0;--yellow:#fff2bd;--yellow-deep:#ffbd3f;--orange:#f78c24;--blue:#8bd0f3;--ink:#191713;--muted:#6f6757;--line:#251f17}*{box-sizing:border-box}body{color:var(--ink);background:var(--yellow);margin:0;font-family:Arial,Microsoft YaHei,sans-serif}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}.app{background:radial-gradient(circle at 72% 28%,#fffbe9 0,#fff4cb 32%,var(--yellow) 72%);min-height:100svh}.topbar{border-bottom:3px solid var(--line);background:#fffaf0bf;justify-content:space-between;align-items:center;height:84px;padding:0 clamp(18px,4vw,64px);display:flex}.brand{color:var(--ink);text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;gap:12px;padding:0;display:flex}.brand-mark{border:3px solid var(--line);width:43px;height:43px;color:var(--orange);background:var(--yellow-deep);border-radius:50%;place-items:center;font-size:25px;line-height:1;display:grid}.brand strong{letter-spacing:-1px;font-size:clamp(20px,2vw,28px);display:block}.brand small{color:var(--muted);margin-top:2px;font-size:12px;font-weight:600;display:block}.header-actions{align-items:center;gap:10px;display:flex}.language{border:2px solid var(--line);background:var(--cream);cursor:pointer;border-radius:19px;padding:0;display:flex;overflow:hidden}.language b,.language span{text-align:center;min-width:54px;padding:8px 11px;font-size:14px}.language b{background:var(--yellow-deep)}.new-chat,.copy{border:2px solid var(--line);color:var(--ink);background:var(--cream);cursor:pointer;border-radius:18px;padding:8px 12px;font-weight:700}.welcome{grid-template-columns:minmax(0,1fr) minmax(340px,.86fr);align-items:center;gap:clamp(24px,5vw,80px);width:min(1240px,90vw);margin:0 auto;padding:clamp(46px,7vw,94px) 0 28px;display:grid;position:relative}.welcome-copy{max-width:650px}.eyebrow{color:var(--orange);margin:0 0 12px;font-size:14px;font-weight:800}.eyebrow span{margin-right:8px}.welcome h1{letter-spacing:-3px;max-width:550px;margin:0;font-size:clamp(38px,4.2vw,66px);line-height:1.1}.intro{max-width:525px;color:var(--muted);margin:18px 0 30px;font-size:16px;line-height:1.75}.welcome-card{border:3px solid var(--line);background:#fffdf4de;border-radius:28px;padding:clamp(21px,3vw,33px);box-shadow:8px 9px #f78c2421}.welcome-card label,.goal-label{margin:0 0 10px;font-weight:800;display:block}.term-input{border:2px solid var(--line);background:#fffdf7;border-radius:17px;align-items:center;gap:10px;padding:4px 13px;display:flex}.term-input span{font-size:23px}.term-input input{background:0 0;border:0;outline:0;width:100%;padding:12px 0;font-size:15px}.examples{color:var(--muted);flex-wrap:wrap;align-items:center;gap:7px;margin-top:12px;font-size:12px;display:flex}.examples button{color:var(--muted);cursor:pointer;background:#fff7d7;border:1px solid #d8c58e;border-radius:12px;padding:4px 8px}.goal-label{margin-top:24px}.goal-grid{grid-template-columns:repeat(5,1fr);gap:9px;display:grid}.goal-grid button{border:2px solid var(--line);min-height:88px;color:var(--ink);cursor:pointer;background:#fffdf7;border-radius:17px;gap:6px;padding:8px 6px;font-size:13px;font-weight:800;display:grid}.goal-grid button span{color:var(--orange);font-size:25px}.goal-grid button:hover,.goal-grid button.selected{box-shadow:3px 3px 0 var(--orange);background:#fff0b2;transform:translate(-1px,-1px)}.primary{border:2px solid var(--line);width:min(260px,100%);color:var(--ink);background:var(--yellow-deep);box-shadow:3px 4px 0 var(--line);cursor:pointer;border-radius:18px;justify-content:center;align-items:center;gap:14px;margin:25px auto 0;padding:13px;font-weight:900;display:flex}.primary span{font-size:22px}.primary:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.hero-visual{min-height:490px;position:relative}.mascot-frame{aspect-ratio:.78;border:4px solid var(--line);background:#bde7ef;border-radius:48% 48% 27% 27%;width:min(390px,91%);position:absolute;bottom:5px;right:0;overflow:hidden;box-shadow:8px 9px #19171329}.mascot-frame img{object-fit:cover;object-position:48% 48%;width:100%;height:100%;transform:scale(1.2)}.blueprint{border:4px solid var(--line);color:#e7f7ff;width:55%;height:138px;box-shadow:4px 5px 0 var(--line);background:#2485c5;border-radius:10px;padding:20px;position:absolute;bottom:17px;right:4%;transform:rotate(-4deg)}.blueprint span{font-size:40px;display:block}.blueprint i{border-top:2px solid #d7f0ff;width:55%;position:absolute;right:14%}.blueprint i:first-of-type{top:33px}.blueprint i:nth-of-type(2){top:68px}.blueprint i:nth-of-type(3){top:103px}.doodle{z-index:2;border:3px solid var(--line);color:var(--ink);background:var(--cream);place-items:center;font-weight:900;display:grid;position:absolute}.plc{border-radius:12px;width:84px;height:62px;top:12px;left:8%;transform:rotate(-8deg)}.gear{color:#72727b;background:0 0;border:0;font-size:55px;top:15%;right:1%}.circuit{color:#4ba9e5;background:0 0;border:0;font-size:66px;top:38%;left:1%}.safety{color:#765b20;background:#fff7d3;border:2px solid #e5b653;border-radius:15px;grid-column:1/-1;align-items:center;gap:10px;margin-top:8px;padding:12px 17px;font-size:13px;display:flex}.safety b,.chat-safety b{color:#fff;background:var(--orange);border-radius:50%;flex:0 0 22px;place-items:center;width:22px;height:22px;display:grid}.chat-mode{background:#fff4c9}.chat-shell{flex-direction:column;width:min(1050px,92vw);min-height:calc(100svh - 84px);margin:0 auto;padding:26px 0 22px;display:flex}.chat-safety{color:#6f5a26;background:#fff8da;border:1px solid #efd98c;border-radius:13px;align-items:center;gap:10px;padding:11px 15px;font-size:13px;display:flex}.chat-topic{align-items:baseline;gap:10px;margin:18px 0 4px;display:flex}.chat-topic span{color:var(--orange);font-size:12px;font-weight:800}.chat-topic strong{font-size:14px}.messages{flex:1;padding:18px 0}.message{align-items:flex-start;gap:12px;max-width:min(820px,87%);margin:0 0 18px;display:flex}.avatar{border:2px solid var(--line);width:45px;height:45px;color:var(--ink);background:var(--blue);border-radius:50%;flex:0 0 45px;place-items:center;font-size:17px;font-weight:900;display:grid;overflow:hidden}.avatar img{object-fit:cover;object-position:50% 45%;width:100%;height:100%;transform:scale(1.36)}.message>div{border:2px solid var(--line);color:var(--ink);white-space:pre-wrap;background:#fffdf7;border-radius:8px 19px 19px;padding:15px 18px;font-size:15px;line-height:1.75;box-shadow:3px 4px #19171314}.message.user{flex-direction:row-reverse;margin-left:auto}.message.user>div{background:#c6ecff;border-radius:19px 8px 19px 19px}.typing{align-items:center;gap:6px;min-height:57px;display:flex}.typing i{background:var(--orange);border-radius:50%;width:7px;height:7px;animation:1.1s infinite pulse}.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}@keyframes pulse{50%{opacity:.5}}.error{color:#c73f2c;font-size:13px}.quick-actions{align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.quick-actions>div{flex-wrap:wrap;gap:9px;display:flex}.quick-actions button{border:2px solid var(--line);min-width:136px;color:var(--ink);cursor:pointer;background:#ffcf65;border-radius:16px;justify-content:space-between;align-items:center;gap:14px;padding:10px 13px;font-weight:800;display:flex;box-shadow:2px 3px #19171329}.quick-actions button b{font-size:22px}.chat-bottom{background:linear-gradient(#0000,#fff4c9 25%);padding:12px 0 2px;position:sticky;bottom:0}.composer{border:3px solid var(--line);background:#fffdf7;border-radius:24px;align-items:center;gap:8px;padding:7px 8px 7px 17px;display:flex}.composer:focus-within{box-shadow:3px 4px #d49d32}.composer input{min-width:0;color:var(--ink);background:0 0;border:0;outline:0;flex:1;padding:9px 0;font-size:16px}.composer button{border:2px solid var(--line);width:42px;height:42px;color:var(--ink);background:var(--blue);cursor:pointer;border-radius:50%;place-items:center;font-size:20px;display:grid}.composer button:disabled{opacity:.45;cursor:not-allowed}.copy{margin:0 0 8px 57px;font-size:12px}@media (width<=760px){.topbar{height:64px;padding:0 15px}.brand{gap:8px}.brand-mark{width:34px;height:34px;font-size:19px}.brand strong{font-size:18px}.brand small{display:none}.language b,.language span{min-width:41px;padding:7px;font-size:12px}.new-chat{padding:7px 9px;font-size:12px}.welcome{width:min(100% - 28px,560px);padding:35px 0 20px;display:block}.welcome h1{letter-spacing:-2px;font-size:39px}.intro{margin:13px 0 23px;font-size:14px}.hero-visual{min-height:270px;margin:25px 0 5px}.mascot-frame{border-width:3px;width:215px;right:12%}.blueprint{border-width:3px;width:145px;height:93px;padding:10px;bottom:4px;right:10%}.blueprint span{font-size:27px}.blueprint i:first-of-type{top:27px}.blueprint i:nth-of-type(2){top:48px}.blueprint i:nth-of-type(3){top:69px}.plc{width:66px;height:48px;font-size:12px;left:5%}.gear{font-size:39px;top:4%}.circuit{font-size:48px;top:43%}.welcome-card{border-radius:22px;padding:20px 16px}.goal-grid{grid-template-columns:repeat(2,1fr)}.goal-grid button{min-height:70px}.goal-grid button:last-child{grid-column:span 2}.goal-grid button span{font-size:20px}.safety{align-items:flex-start;margin-top:15px;font-size:12px}.chat-shell{width:min(100% - 24px,620px);min-height:calc(100svh - 64px);padding:15px 0 10px}.chat-safety{align-items:flex-start;font-size:12px;line-height:1.55}.chat-topic{margin-top:12px}.messages{padding:12px 0}.message{gap:8px;max-width:94%;margin-bottom:14px}.avatar{flex-basis:36px;width:36px;height:36px}.message>div{padding:11px 13px;font-size:14px;line-height:1.7}.quick-actions{gap:8px;margin-bottom:10px}.quick-actions>div{gap:7px}.quick-actions button{flex:1;min-width:calc(50% - 4px);padding:9px 10px;font-size:13px}.quick-actions .avatar{display:none}.copy{margin-left:0}.composer{padding-left:13px}.composer input{font-size:16px}.composer button{width:38px;height:38px}.chat-bottom{padding-top:8px}}@media (width<=390px){.header-actions{gap:5px}.new-chat{display:none}.welcome h1{font-size:34px}.examples button:nth-of-type(n+4){display:none}.quick-actions button{min-width:100%}.hero-visual{min-height:245px}.mascot-frame{right:8%}.blueprint{right:5%}}