*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:#0b1945;background:#fbfdff;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}button:disabled{cursor:default}button,input,textarea,select{border-radius:8px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #2184ff;outline-offset:4px}button{background:none;border:0}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{line-height:1.45}h1{font-size:46px;letter-spacing:-1.5px}h2{font-size:30px;letter-spacing:-.6px}h3{font-size:19px}p{color:#63789c}img{max-width:100%;vertical-align:middle}.icon{width:23px;height:23px;flex:none;vertical-align:middle}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-60px;left:20px;z-index:100;background:#fff;padding:10px}.skip-link:focus{top:10px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:46px;padding:11px 26px;background:#0767ff;color:#fff;border:1px solid #0767ff;border-radius:9px;font-weight:500;box-shadow:0 6px 16px #0870ff0c;transition:background .2s,transform .2s}.button:hover{background:#0055e4;transform:translateY(-2px)}.button-secondary{color:#0871ff;background:#edf5ff;border-color:#d0e3ff}.button-secondary:hover{background:#e2efff}.text-link{display:inline-flex;gap:8px;align-items:center;color:#0065f2;font-weight:500;padding:6px 0}.text-link:hover{color:#004cba}.actions{display:flex;align-items:center;gap:30px;flex-wrap:wrap}.lead{font-size:16px;line-height:1.9}.eyebrow{color:#1b53a7;font-size:17px;font-weight:500;margin-bottom:19px;letter-spacing:.3px}.site-header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 max(4%,calc((100vw - 1440px)/2));gap:28px;background:#ffffffd9;border-bottom:1px solid #dce9fc;backdrop-filter:blur(18px);position:relative;z-index:20}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.brand strong{display:block;font-size:22px;line-height:1.25;letter-spacing:1px}.brand small{display:block;color:#7b8ba8;font-size:10px;letter-spacing:2.6px;margin-top:3px}.main-nav{display:flex;height:100%;align-items:center;gap:48px}.main-nav a{height:100%;display:flex;align-items:center;position:relative;font-size:16px;white-space:nowrap}.main-nav a.active{color:#0767ff;font-weight:600}.main-nav a.active:after{content:"";height:2px;background:#0871ff;position:absolute;bottom:16px;left:0;right:0}.header-tools{display:flex;align-items:center;gap:23px;font-size:14px}.icon-button{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;flex:none}.icon-button:hover{background:#e8f2ff}.space-link{display:flex;align-items:center;gap:10px;padding-left:20px;border-left:1px solid #dfebfb;white-space:nowrap}.avatar{display:inline-flex;align-items:center;justify-content:center;border:3px solid #fff;background:linear-gradient(145deg,#c2e1ff,#7798ce);color:white;border-radius:50%;width:37px;height:37px;flex:none;font-size:14px}.site-footer{padding:35px max(4%,calc((100vw - 1320px)/2));display:flex;flex-wrap:wrap;align-items:center;gap:30px;justify-content:space-between;background:white;border-top:1px solid #edf3fd}.site-footer>div{display:flex;gap:26px;color:#596c91;font-size:13px}.site-footer .brand strong{font-size:19px}.site-footer .brand img{width:35px}.portal-link{font-size:12px;color:#7b8ba8;display:flex;gap:7px;align-items:center}.portal-link .icon{width:16px}.toast{position:fixed;bottom:26px;left:50%;transform:translate(-50%,20px);background:#122b50ed;color:white;padding:12px 24px;border-radius:12px;box-shadow:0 10px 30px #13396920;max-width:calc(100% - 32px);z-index:100;opacity:0;pointer-events:none;transition:.2s}.toast.visible{opacity:1;transform:translate(-50%,0)}
/* Landing: an open, light-filled education ecosystem. */
.landing{overflow:hidden}.section-inner{max-width:1380px;padding:0 50px;margin:0 auto;position:relative;display:flex;align-items:center;min-height:inherit}.landing-copy{position:relative;z-index:2;width:57%}.landing-copy h1{font-size:clamp(38px,3.9vw,57px);line-height:1.37;letter-spacing:0;margin-bottom:20px}.landing-copy h1 span{color:#0669ff}.landing-copy h2{font-size:clamp(28px,2.55vw,37px);line-height:1.5;margin-bottom:14px}.landing-copy .lead{margin-bottom:33px}.landing-hero{min-height:590px;position:relative;background:#edf6ff url('ecosystem-hero.png') center 48%/cover no-repeat}.landing-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#ffffffc9 0%,#ffffff78 37%,transparent 62%)}.landing-hero:after{content:"";position:absolute;bottom:-2px;left:-4%;width:108%;height:32px;background:#fff;border-radius:50% 50% 0 0}.hero-notes{display:flex;gap:15px;align-items:center;margin-top:33px;color:#6682ac;font-size:12px;letter-spacing:1px}.hero-notes i{height:3px;width:3px;background:#92b5df;border-radius:50%}.landing-section{min-height:424px;position:relative;background:linear-gradient(110deg,#fff 30%,#f0f7ff 78%,#e4f1ff)}.landing-section:after{content:"";position:absolute;bottom:-1px;left:-5%;width:110%;height:28px;background:#fff;border-radius:50% 50% 0 0;opacity:.65}.section-trust{background:radial-gradient(ellipse at 70% 50%,#d1e8ff,#e9f4ff 50%,#f4f9ff)}.section-open{background:linear-gradient(115deg,#fff 20%,#f3f8ff 64%,#daecff);min-height:440px}.mobile-break{display:none}.capability-line{color:#235dae;margin:-13px 0 26px;display:flex;gap:14px;font-size:14px}.capability-line i{font-style:normal}.scene{width:49%;height:370px;position:absolute;right:22px;bottom:18px;perspective:850px}.podium{position:absolute;width:92%;height:105px;bottom:0;left:4%;border-radius:50%;background:linear-gradient(180deg,#c7e0f52e,#adccec88 35%,#fff 55%,#b3d0f0 66%,#ebf5ff 86%);box-shadow:0 20px 25px #4081c21b,inset 0 0 0 2px #ffffffe0}.podium:before{content:"";position:absolute;inset:6px 4%;border:2px solid #fff;border-radius:50%;box-shadow:0 0 12px #fff}.podium i{position:absolute;bottom:30px;left:13%;width:74%;height:78px;background:linear-gradient(180deg,#edf6ffbb,#a1c2e8 62%,#fbfdff 66%,#88b7ef 86%,#eaf8ff);border-radius:50%;border:2px solid #fff;box-shadow:0 6px 10px #387fde20}.podium i:nth-child(2){width:58%;left:21%;bottom:42px;height:66px}.podium i:nth-child(3){width:47%;left:26.5%;bottom:50px;height:57px;background:linear-gradient(180deg,#e7f4ff,#b5d8ff 48%,#fff 50%,#71b6ff 85%,#effaff);border-bottom:3px solid #81bcff}.glass-panel{position:absolute;top:57px;width:28%;height:225px;border:2px solid #fff;border-radius:14px;background:linear-gradient(130deg,#ffffffc9,#d4eaff85);box-shadow:0 0 0 5px #ffffff48,0 9px 32px #437dae24,inset 0 0 25px #fff;z-index:2;text-align:center;padding:24px 12px;color:#2867ab}.glass-panel .icon{width:35px;height:35px;display:block;margin:0 auto 12px;color:#4098ff}.glass-panel strong{font-size:17px}.glass-panel>span{font-size:12px;display:block;margin-top:13px}.panel-left{left:5%;transform:rotateY(-25deg) rotateZ(-3deg)}.panel-right{right:4%;transform:rotateY(24deg) rotateZ(3deg)}.panel-main{width:35%;height:280px;left:33%;top:16px;background:linear-gradient(150deg,#f4faff,#8fc3ff 43%,#d0e7ff);transform:rotateY(-9deg);text-align:left;padding:22px;z-index:3}.panel-main>span{font-size:19px;color:#fff;font-weight:500;text-shadow:0 1px 4px #5194e4}.panel-main img{width:78px;display:block;margin:29px auto 22px;filter:drop-shadow(0 12px 12px #1672cf3b)}.panel-main b{font-size:11px;color:#377ac4;font-weight:400}.mini-lines{height:65px;margin-top:14px;background:linear-gradient(30deg,#93bdeb2b 22%,#accff877 23% 45%,#fff9 46% 60%,#afd2ef55 61%);border-radius:7px}.glass-shield{position:absolute;left:35%;top:42px;width:36%;height:210px;display:flex;align-items:center;justify-content:center;z-index:3;background:linear-gradient(115deg,#fff,#e6f4ff 15%,#60a2f4 50%,#a6d4ff 75%,#fff);clip-path:polygon(50% 0,98% 15%,94% 61%,82% 78%,50% 100%,18% 78%,6% 61%,2% 15%);filter:drop-shadow(0 15px 15px #4b8fde4d)}.glass-shield .icon{width:83%;height:83%;fill:#3782e677;color:#f9fdff;stroke-width:1.4;filter:drop-shadow(0 4px 3px #134cae4d)}.trust-orbit{position:absolute;top:80px;left:8%;width:87%;height:149px;border:1px solid #609cff;border-left-color:#fff;border-top-color:#fff;border-radius:50%;transform:rotate(-14deg);z-index:4;pointer-events:none}.orbit-badge{position:absolute;width:77px;height:77px;border:1px solid #fff;background:linear-gradient(135deg,#ffffffc9,#cce4ff9c);border-radius:50%;box-shadow:inset 0 0 9px white,0 4px 16px #619fe61f;display:flex;align-items:center;justify-content:center;flex-direction:column;color:#2e69bc;z-index:5;font-size:12px}.orbit-badge .icon{color:#0e76ff;width:29px;height:29px;margin-bottom:3px}.pos-one{left:16%;top:24px}.pos-two{right:9%;top:58px}.pos-three{left:11%;top:171px}.pos-four{right:5%;top:209px}.code-window{position:absolute;left:31%;top:32px;width:39%;height:256px;border:7px solid #cce8ff;border-radius:10px;background:linear-gradient(120deg,#154c9c,#5c98e7);box-shadow:0 0 0 2px #fff,0 0 0 14px #ddefff66,10px 8px 0 14px #c2def633;transform:rotateY(-17deg) rotateZ(-3deg);z-index:2;overflow:hidden}.window-dots{color:#e1f4ff;padding:7px;font-size:12px;border-bottom:1px solid #c3e2ff55;display:flex;gap:8px;align-items:center}.window-dots span{font-size:5px}.code-lines{padding:19px 15px}.code-lines i{display:block;height:3px;background:#a5d8ff85;width:75%;margin:10px 0}.code-lines i:nth-child(2n){width:53%;margin-left:16px;background:#f0f8ff80}.code-symbol{position:absolute;left:42%;top:143px;width:31%;height:125px;z-index:4;border:2px solid white;border-radius:15px;display:grid;place-items:center;background:linear-gradient(140deg,#bcd9ff99,#4d98f0bb);box-shadow:0 10px 20px #2471be33,inset 0 0 20px #e3f5ff77;backdrop-filter:blur(4px)}.code-symbol .icon{width:65px;height:65px;color:#fff}.code-chip{position:absolute;display:flex;align-items:center;gap:13px;border:1px solid white;box-shadow:0 0 0 3px #ecf7ff5c;padding:13px 15px;border-radius:9px;color:#2172d3;background:linear-gradient(120deg,#fff9,#d7eaff80);font-size:13px;z-index:3}.chip-api{left:7%;top:79px;transform:rotate(-6deg)}.chip-sdk{left:7%;top:166px;transform:rotate(-6deg)}.chip-test{right:0;top:95px;transform:rotate(5deg)}.chip-publish{right:0;top:180px;transform:rotate(5deg)}
/* Catalog and secondary pages. */
.page-shell{max-width:1280px;margin:0 auto;padding:24px 42px 65px;min-height:calc(100vh - 210px)}.breadcrumb{display:flex;gap:12px;font-size:13px;color:#7488a8}.breadcrumb a{color:#3464a6}.catalog-hero{text-align:center;padding:45px 0 44px;position:relative}.catalog-hero:before{content:"";position:absolute;width:750px;height:320px;max-width:100%;background:radial-gradient(ellipse,#e0efff99,transparent 70%);top:-60px;left:50%;transform:translateX(-50%);z-index:-1}.catalog-hero h1{font-size:38px;margin-bottom:12px}.catalog-hero .eyebrow{font-size:15px;margin-bottom:10px}.search-box{margin:28px auto 0;max-width:640px;display:flex;align-items:center;gap:15px;background:white;border:1px solid #ccdefa;padding:7px 8px 7px 18px;border-radius:13px;box-shadow:0 10px 25px #126ad50b;text-align:left}.search-box>.icon{color:#6596ce}.search-box input{min-width:0;width:100%;border:0;outline:0;padding:8px 0;background:transparent;font-size:14px}.search-box .button{min-height:39px;padding:8px 24px}.filter-row{border-top:1px solid #e5edf7;border-bottom:1px solid #e5edf7;padding:18px 0;display:flex;align-items:center;gap:30px}.filter-row strong{font-size:14px;white-space:nowrap}.filter-row>div{display:flex;gap:9px;flex-wrap:wrap}.filter{padding:6px 18px;color:#647593;border-radius:6px;font-size:14px}.filter.selected{color:#0768f4;background:#e8f2ff;font-weight:600}.filter:hover{background:#f0f6ff}.list-heading{display:flex;justify-content:space-between;align-items:center;margin:29px 0 21px}.list-heading h2{font-size:23px}.list-heading>span{font-size:13px;color:#8192ad}.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.app-card{padding:26px 26px 22px;border:1px solid #dce8f8;border-radius:14px;background:#fff;transition:box-shadow .2s,transform .2s}.app-card:hover{box-shadow:0 12px 32px #2268ba10;transform:translateY(-3px)}.app-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.app-icon,.folder-icon,.file-icon{background:#e6f1ff;color:#1678ff;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;width:52px;height:52px;flex:none}.app-icon .icon{width:29px;height:29px}.blue{background:#e8f2ff;color:#1678ff}.purple{background:#f0eaff;color:#8455eb}.green{background:#e4f8f1;color:#05ac8c}.cyan{background:#e1f8ff;color:#00a5d1}.orange{background:#fff0e7;color:#f7793d}.red{background:#ffe9eb;color:#f0546a}.status-pill{font-size:11px;color:#7185a6;padding:3px 9px;background:#f5f8fd;border-radius:20px}.app-card h3{font-size:19px;margin-bottom:11px}.app-card p{font-size:14px;min-height:51px}.tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.tags span{color:#5878a8;font-size:12px;background:#f1f6ff;padding:3px 10px;border-radius:6px}.app-link{border-top:1px solid #ecf1fa;padding-top:15px;margin-top:23px;display:flex;align-items:center;justify-content:space-between;color:#1871e8;font-size:14px}.app-link .icon{width:19px}.join-banner{margin-top:45px;background:linear-gradient(115deg,#f0f7ff,#e6f1ff);border:1px solid #e1edfe;border-radius:15px;padding:30px 36px;display:flex;align-items:center;justify-content:space-between;gap:24px}.join-banner h2{font-size:23px;margin-bottom:6px}.join-banner p{font-size:14px}.empty-state{text-align:center;padding:65px 20px;border:1px dashed #d9e6f9;border-radius:14px}.empty-state>.icon{width:38px;height:38px;color:#90b5e0;margin-bottom:15px}.empty-state p{margin:10px 0 20px}.detail-hero{display:flex;justify-content:space-between;align-items:center;padding:65px 35px 60px;gap:30px;background:radial-gradient(ellipse at 88% 50%,#dcecff99,transparent 59%)}.detail-hero h1{font-size:43px;line-height:1.5;margin-bottom:17px}.detail-hero .lead{margin-bottom:25px}.detail-emblem{width:230px;height:230px;border-radius:50%;background:linear-gradient(140deg,#fff,#d2e6ff 70%);box-shadow:0 0 0 24px #f4f9ff,0 0 0 25px #e6f1ff,inset 0 0 0 2px #fff,0 22px 30px #4080c326;display:grid;place-items:center;margin:0 55px}.detail-emblem .icon{width:125px;height:125px;color:#328dff;stroke-width:1.1;filter:drop-shadow(0 10px 5px #5c9cf152)}.code-emblem{border-radius:36px;transform:rotate(-7deg)}.content-section{padding:38px 0}.section-title{margin-bottom:29px}.section-title h2{font-size:28px}.section-title p{margin-top:10px}.section-title .eyebrow{margin:0 0 10px}.identity-grid,.developer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.info-card{padding:27px 24px;border:1px solid #e0eafa;border-radius:14px;background:#fff}.info-card>.icon{width:32px;height:32px;color:#1678ff;margin-bottom:20px}.info-card h3{margin-bottom:10px}.info-card p{font-size:14px}.info-card small{display:block;color:#8a9bb6;margin-top:16px;font-size:11px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:35px}.step-number{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:12px;background:#e8f2ff;color:#0b6af5;font-size:17px;font-weight:600;margin-bottom:17px}.steps h3{font-size:17px;margin-bottom:9px}.steps p{font-size:13px}.soft-notice{display:flex;align-items:center;gap:14px;background:#f1f6fd;border-radius:10px;padding:18px 23px;margin-top:38px;font-size:13px}.soft-notice>.icon{color:#6c9bd4}.small-label,.experience-label{display:inline-block;color:#6591c8;background:#edf5ff;border-radius:5px;padding:2px 9px;font-size:11px;letter-spacing:.4px;font-weight:400}.info-card .small-label{margin-top:20px}.experience-label{padding:4px 13px;border-radius:20px;font-size:12px}.research-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:23px}.center-action{text-align:center;margin-top:34px}.space-page{padding-top:70px;min-height:calc(100vh - 191px)}.space-heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:50px}.space-heading h1{font-size:32px;margin-bottom:12px}.space-heading .eyebrow{margin-bottom:10px}.saved-card{display:flex;align-items:center;gap:22px;border:1px solid #dce8f8;padding:25px;border-radius:12px;background:#fff}.saved-card>div{flex:1}.saved-card p{font-size:13px;margin-top:5px}.saved-actions{display:flex;gap:20px;flex:none!important}.help-page{padding-top:57px}.help-page h1{font-size:34px}.help-grid{display:grid;grid-template-columns:220px 1fr;gap:55px;margin-top:45px}.help-grid nav{display:flex;flex-direction:column;gap:14px;align-items:flex-start;font-size:14px}.help-grid nav a{padding:6px 0;color:#4b72a3}.help-grid section{margin-bottom:35px}.help-grid section h2{font-size:23px;margin-bottom:15px}.help-grid section p{line-height:1.9;margin:10px 0}.help-grid p a{color:#0770f6}.help-grid details{border-bottom:1px solid #e3ebf7;padding:15px 0}.help-grid summary{cursor:pointer;font-weight:500}
/* Teaching workspace. */
.workspace-page{background:linear-gradient(135deg,#f6faff,#fff 60%,#f3f8ff)}.workspace-page .site-header{height:72px;padding:0 3.3%}.workspace{position:relative;display:flex;min-height:calc(100vh - 72px)}.workspace-sidebar{width:285px;flex:none;position:relative;padding:28px 20px 55px;border-right:1px solid #e1edfd;background:linear-gradient(160deg,#f8fbffec,#ffffffb0);min-height:calc(100vh - 72px)}.workbench-brand{display:flex;align-items:center;gap:8px;margin-bottom:27px;white-space:nowrap}.workbench-brand strong{font-size:16px}.engine-icon{width:38px;height:38px;object-fit:cover;flex:none;border-radius:50%}.workbench-brand .icon-button{width:26px;color:#7c99c2;margin-left:auto}.workbench-brand .icon{width:18px}.new-chat{display:flex;align-items:center;gap:15px;padding:12px 16px;background:#e6f0ff;border-radius:10px;font-weight:500}.new-chat>.icon{background:#0870ff;border-radius:50%;color:#fff;padding:4px;width:26px;height:26px}.sidebar-section{border-top:1px solid #e6eef9;margin-top:21px;padding-top:20px}.sidebar-title{display:flex;justify-content:space-between;align-items:center;margin:0 9px 12px}.sidebar-title h2{font-size:14px;letter-spacing:0}.sidebar-title>span{font-size:12px;color:#8ba0bf}.project-row{display:flex;align-items:center;gap:13px;padding:12px 7px}.project-row b{font-size:13px;font-weight:500}.project-row small,.recent-row small{display:block;font-size:11px;color:#8aa0c0;margin-top:3px}.folder-icon{width:37px;height:37px;border-radius:8px}.folder-icon .icon{width:22px;height:22px}.recent-row{display:flex;gap:15px;align-items:center;padding:11px 12px;border-radius:10px;font-size:12px}.recent-row>.icon{width:19px;height:19px;color:#708db5}.recent-row.current{background:#ebf4ff}.project-row:hover,.recent-row:hover{background:#edf5ff;border-radius:8px}.sidebar-bottom{position:absolute;bottom:20px;left:30px;font-size:12px;color:#6e88ad;display:flex;gap:10px;align-items:center}.sidebar-bottom .icon{width:17px}.welcome-workspace{flex:1;min-width:0;text-align:center;position:relative;padding:42px 6% 55px;background:radial-gradient(ellipse at 58% 7%,#cfe5ff66,transparent 65%)}.welcome-workspace:before{content:"";position:absolute;left:0;right:0;top:0;height:320px;background:linear-gradient(158deg,transparent 33%,#ffffff8c 33.2%,transparent 62%);pointer-events:none}.welcome-visual{width:380px;height:260px;max-width:100%;position:relative;margin:0 auto 12px}.welcome-visual>img{width:144px;position:absolute;top:36px;left:calc(50% - 72px);filter:drop-shadow(0 15px 15px #4b9cf538);transform:rotate(-4deg);z-index:2}.welcome-visual .podium{width:90%;left:5%;height:64px;bottom:15px;opacity:.66}.welcome-visual .podium i{height:56px;bottom:15px}.welcome-visual .podium i:nth-child(2){height:43px;bottom:27px}.welcome-visual .podium i:nth-child(3){height:34px;bottom:37px}.book-orbit{position:absolute;width:335px;max-width:94%;height:115px;left:6%;top:61px;border:1px solid #5795ff;border-top-color:#cfe4ff;border-radius:50%;transform:rotate(-19deg);z-index:3}.book-orbit:before,.book-orbit:after{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:linear-gradient(140deg,white,#5b9cf8);top:31px;left:0}.book-orbit:after{left:auto;right:17px;top:83px}.welcome-workspace h1{font-size:clamp(28px,3.15vw,43px);letter-spacing:1px;line-height:1.5;margin:11px 0 13px}.welcome-description{font-size:18px;line-height:1.9;margin-bottom:31px}.composer{border:1px solid #cce1ff;border-radius:21px;background:#ffffffec;box-shadow:0 10px 28px #2380e812;max-width:910px;margin:0 auto;padding:18px 19px;text-align:left}.composer textarea{display:block;width:100%;resize:vertical;min-height:76px;max-height:200px;border:0;color:#294c7d;background:transparent;padding:2px 2px 12px;line-height:1.8;font-size:16px;outline:0}.composer textarea::placeholder{color:#8396b5}.composer-toolbar{display:flex;align-items:center;justify-content:space-between;margin-top:10px;gap:12px}.composer-toolbar>div{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.attachment-button{border:1px solid #e3edf9;border-radius:50%;color:#59759e;background:#f7faff;cursor:pointer}.select-wrap{display:flex;align-items:center;gap:7px;border:1px solid #e0e9f7;border-radius:9px;padding:7px 10px;color:#5f79a2;font-size:12px;background:#fff}.select-wrap>.icon{width:17px;height:17px}.select-wrap select{border:0;color:inherit;background:transparent;max-width:130px;cursor:pointer;outline:0}.send-button{width:43px;height:43px;border-radius:50%;background:linear-gradient(145deg,#a5d1ff,#5f9ffc);color:#fff;display:grid;place-items:center;flex:none}.send-button:hover{background:#0870ff}.send-button .icon{transform:rotate(-90deg);width:27px;height:27px}.attachment-label{font-size:11px;color:#7891b4;word-break:break-word}.prompt-examples{display:flex;align-items:center;justify-content:center;gap:14px;font-size:12px;color:#92a3bc;margin-top:22px}.prompt-examples button{color:#5b86bc;font-size:12px;background:#f3f8ff;border:1px solid #e5effc;padding:6px 12px;border-radius:20px}.prompt-examples .icon{width:15px;height:15px}.static-note{font-size:11px;color:#8799b4;text-align:center;margin-top:20px;line-height:1.8}.sidebar-reopen{display:none;position:absolute;top:12px;left:9px;z-index:8;background:white;box-shadow:0 3px 15px #1c4c7510}.sidebar-collapsed .workspace-sidebar{display:none}.sidebar-collapsed .sidebar-reopen{display:flex}.design-result{display:grid;grid-template-columns:minmax(360px,1.12fr) minmax(360px,1fr);flex:1;min-width:0}.conversation{padding:22px 24px;min-width:0;border-right:1px solid #e1edfd;display:flex;flex-direction:column}.conversation>h2,.lesson-panel>h2{font-size:23px;margin:0 0 21px}.conversation>h2{display:flex;gap:12px;align-items:center;border-bottom:1px solid #e6effa;padding-bottom:16px}.messages{flex:1}.message{display:flex;gap:12px;align-items:flex-start;margin-bottom:24px}.message>.engine-icon,.message>.avatar{width:36px;height:36px}.message>div{background:#fff;border:1px solid #e6f0ff;border-radius:15px;padding:17px 18px;min-width:0;flex:1}.message p{font-size:14px;color:#536e99;line-height:1.9}.message p+p{margin-top:10px}.user-message>div{background:#e4f0ff;border-color:#e4f0ff}.engine-progress{margin-top:16px;padding:14px;background:linear-gradient(140deg,#f8fbff,#f1f7ff);border:1px solid #e2eeff;border-radius:12px}.engine-progress h3{font-size:13px;display:flex;gap:7px;align-items:center}.engine-progress h3 .engine-icon{width:25px;height:25px}.engine-progress ol{display:flex;list-style:none;padding:0;margin:18px 0 0;justify-content:space-between;gap:4px}.engine-progress li{font-size:10px;position:relative;flex:1;text-align:center;z-index:1}.engine-progress li:after{content:"";position:absolute;top:11px;left:50%;width:100%;height:2px;background:#2282ff;z-index:-1}.engine-progress li:last-child:after{display:none}.engine-progress li>span{display:grid;place-items:center;width:23px;height:23px;margin:0 auto 8px;background:#1078ff;border-radius:50%;color:#fff;border:2px solid #fff;box-shadow:0 0 0 2px #e5f0ff}.engine-progress b{display:block;font-size:11px;white-space:nowrap}.engine-progress small{color:#8fa3c1;font-size:9px;display:block;margin-top:5px}.composer-compact{margin-top:4px;padding:14px;width:100%;border-radius:17px}.composer-compact textarea{font-size:13px;min-height:46px}.composer-compact .select-wrap{font-size:10px;padding:6px}.composer-compact .select-wrap>.icon{width:14px}.composer-compact .composer-toolbar>div{gap:7px}.composer-compact .attachment-button{width:32px;height:32px}.composer-compact .send-button{width:36px;height:36px}.lesson-panel{padding:22px 20px;min-width:0;background:#f3f8ff55}.preview-tabs{display:flex;border:1px solid #e6effe;background:#f5f9ff;border-radius:12px;margin-bottom:4px;overflow:hidden}.preview-tabs button{flex:1;color:#6c80a4;padding:11px 2px;font-size:14px;position:relative;border-radius:9px}.preview-tabs button[aria-selected=true]{background:#fff;color:#0072ff;font-weight:600}.preview-tabs button[aria-selected=true]:after{content:"";position:absolute;height:2px;bottom:4px;width:55%;left:22.5%;background:#0b75ff}.preview-card{padding:21px 18px 17px;background:#fff;border:1px solid #eaf1fe;border-radius:15px}.lesson-heading{display:flex;align-items:center;gap:11px}.lesson-heading .app-icon{width:48px;height:57px}.lesson-heading h3{font-size:16px}.lesson-heading .tags{margin-top:10px;gap:6px}.lesson-heading .tags span{padding:2px 8px;font-size:11px}.edit-button{border:1px solid #e4edfa;font-size:12px;padding:6px 10px;white-space:nowrap;margin-left:auto;color:#5c7db0}.lesson-title[contenteditable=true]{outline:2px solid #2184ff;padding:3px;border-radius:3px}.lesson-description{font-size:13px;margin:16px 0;line-height:1.9}.lesson-accordions details{border:1px solid #e4edfb;border-radius:8px;margin-bottom:9px;background:#fbfdff}.lesson-accordions summary{list-style:none;display:flex;align-items:center;gap:12px;padding:10px 12px;cursor:pointer;font-size:13px;font-weight:500}.lesson-accordions summary::-webkit-details-marker{display:none}.lesson-accordions summary>.icon:first-child{color:#1480ff;width:21px;height:21px}.lesson-accordions summary>.icon:last-child{margin-left:auto;width:16px;height:16px;transition:transform .15s}.lesson-accordions details[open] summary>.icon:last-child{transform:rotate(180deg)}.lesson-accordions details p{padding:0 14px 14px;font-size:12px;line-height:1.9}.resource-heading{display:flex;align-items:center;justify-content:space-between;margin:20px 0 12px}.resource-heading h3{font-size:15px;display:flex;gap:9px;align-items:center}.resource-heading h3 .icon{width:20px;color:#097aff}.resource-heading .text-link{font-size:11px;gap:5px}.resource-heading .text-link .icon{width:15px}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.resource-card{display:flex;align-items:center;gap:7px;border:1px solid #e4edfa;border-radius:9px;text-align:left;padding:9px 7px;background:#fbfdff;min-width:0}.resource-card:hover{background:#eff6ff}.file-icon{height:34px;width:26px;border-radius:5px;font-size:16px;font-weight:600}.resource-card b{font-size:10px;display:block;white-space:nowrap;font-weight:500}.resource-card small{display:block;font-size:9px;color:#93a4bf;white-space:nowrap}.quick-tuning{display:flex;flex-wrap:wrap;gap:6px}.quick-tuning button{border:1px solid #dce9fc;background:#f5f9ff;border-radius:20px;font-size:11px;padding:7px 10px;color:#5b7da8}.quick-tuning button:hover{border-color:#85bbff;background:#ecf5ff}.tuning-status{font-size:11px;margin-top:10px;color:#5f89ba}.preview-actions{display:flex;gap:10px;margin-top:23px}.preview-actions .button{padding:10px 12px;font-size:12px;flex:1;white-space:nowrap}.preview-actions .icon{width:17px;height:17px}.preview-card .static-note{font-size:10px;margin-top:15px}.full-width{width:100%;margin-top:25px}.muted{font-size:13px;margin:12px 0 22px}.suggestion-list article{padding:20px 0;border-bottom:1px solid #e7effa}.suggestion-list h4{font-size:14px;margin-bottom:8px}.suggestion-list p{font-size:13px}.local-reply{margin-top:12px}
@media(min-width:1600px){.workspace-sidebar{width:320px;padding-left:26px;padding-right:26px}.welcome-workspace{padding-top:65px}.welcome-visual{height:310px;width:440px}.welcome-visual>img{width:160px;left:calc(50% - 80px);top:55px}.book-orbit{width:390px;height:142px;top:79px}.welcome-workspace h1{font-size:45px}.conversation{padding:28px 30px}.lesson-panel{padding:28px}.message p{font-size:16px}.message>div{padding:20px}.resource-card b{font-size:12px}.resource-card small{font-size:10px}.lesson-heading h3{font-size:18px}}
@media(max-width:1200px){.site-header{padding:0 30px;gap:20px}.main-nav{gap:32px}.header-tools{gap:15px}.brand strong{font-size:20px}.section-inner{padding:0 40px}.scene{right:10px;width:46%}.landing-hero{min-height:550px}.landing-copy{width:57%}.workspace-sidebar{width:245px;padding:24px 14px}.workbench-brand strong{font-size:14px}.workbench-brand .engine-icon{width:32px;height:32px}.project-row b{font-size:12px}.recent-row{font-size:11px;padding-left:8px;gap:10px}.design-result{grid-template-columns:minmax(310px,1.05fr) minmax(320px,1fr)}.conversation{padding:20px 16px}.lesson-panel{padding:20px 12px}.message{gap:8px}.message>div{padding:14px}.message>.avatar,.message>.engine-icon{width:30px;height:30px}.message p{font-size:12px}.preview-card{padding:18px 12px}.lesson-heading{gap:8px}.lesson-heading h3{font-size:14px}.preview-actions{flex-direction:column}.composer-compact .select-wrap>.icon{display:none}.detail-emblem{margin:0 30px}.welcome-workspace{padding-left:5%;padding-right:5%}.welcome-description{font-size:16px}}
@media(max-width:1000px){.header-tools>.icon-button{display:none}.space-link{padding-left:12px}.site-header{gap:18px}.main-nav{gap:24px}.main-nav a{font-size:14px}.brand small{letter-spacing:1.5px}.landing-copy h2{font-size:28px}.landing-copy .lead{font-size:14px}.scene{transform:scale(.9);transform-origin:right center;right:0;width:49%}.landing-copy{width:60%}.landing-hero{min-height:500px}.landing-copy h1{font-size:39px}.landing-section{min-height:380px}.scene{bottom:0}.detail-hero{padding:45px 10px}.detail-hero h1{font-size:35px}.detail-emblem{width:170px;height:170px;margin:0 25px}.detail-emblem .icon{width:95px;height:95px}.identity-grid,.developer-grid{grid-template-columns:repeat(2,1fr)}.app-grid{gap:15px}.app-card{padding:22px 18px}.app-card h3{font-size:17px}.workspace-sidebar{width:225px;padding-left:12px;padding-right:12px}.workbench-brand{gap:4px}.workbench-brand strong{font-size:12px}.project-row{gap:9px}.project-row b{font-size:11px}.recent-row{font-size:10px}.design-result{display:block}.conversation{border-right:0}.lesson-panel{padding:20px}.composer-compact{margin-top:8px}.preview-actions{flex-direction:row}.lesson-heading h3{font-size:17px}.resource-card b{font-size:12px}.welcome-workspace{padding-top:28px}.welcome-visual{height:240px}.welcome-workspace h1{font-size:28px}.welcome-description{font-size:14px}.composer textarea{font-size:14px}.composer-toolbar>div{gap:6px}.select-wrap{padding:5px;font-size:11px}.attachment-button{width:31px;height:31px}.select-wrap>.icon{display:none}.message p{font-size:14px}.resource-card{padding:12px}.page-shell{padding-left:30px;padding-right:30px}}
@media(max-width:700px){html{scroll-padding-top:20px}h1{font-size:30px}.site-header,.workspace-page .site-header{height:auto;min-height:108px;flex-wrap:wrap;padding:16px 20px 0;gap:12px;align-content:center}.brand img{width:33px;height:32px}.brand strong{font-size:18px}.brand small{font-size:8px;letter-spacing:1.5px}.header-tools{margin-left:auto;font-size:12px;gap:14px}.space-link{border:0;padding:0;gap:7px}.space-link .avatar{width:30px;height:30px}.header-tools>a:first-child{display:none}.main-nav{order:3;justify-content:center;width:100%;gap:48px;height:39px}.main-nav a{height:39px;font-size:14px}.main-nav a.active:after{bottom:0}.section-inner{padding:36px 25px;display:block}.landing-hero{min-height:680px;background-size:auto 460px;background-position:67% bottom;background-color:#f8fbff}.landing-hero:before{background:linear-gradient(180deg,#f8fbff 30%,#f8fbffed 43%,#f8fbff00 67%)}.landing-copy{width:100%}.landing-copy h1{font-size:37px;line-height:1.4;margin-bottom:13px}.landing-copy h2{font-size:29px}.landing-copy .lead{font-size:13px;margin-bottom:24px}.landing-hero .lead{max-width:300px}.eyebrow{font-size:14px;margin-bottom:12px}.landing-hero .actions{gap:23px}.button{font-size:14px;padding:10px 20px;min-height:43px}.hero-notes{margin-top:19px;font-size:10px;gap:11px}.landing-section{min-height:610px}.landing-section .section-inner{min-height:610px}.landing-section .landing-copy .lead br{display:none}.landing-section .landing-copy h2 br{display:none}.landing-section .landing-copy h2 .mobile-break{display:block}.scene{width:390px;max-width:100%;height:340px;right:50%;bottom:5px;transform:translateX(50%) scale(.87);transform-origin:center bottom}.scene-apps{bottom:7px}.section-trust .section-inner{padding-top:40px}.section-trust{min-height:640px}.section-trust .section-inner{min-height:640px}.section-open,.section-open .section-inner{min-height:670px}.section-open .landing-copy h2{max-width:325px}.capability-line{font-size:12px;gap:12px;margin-top:-9px}.code-chip{font-size:11px;padding:11px 13px}.site-footer{padding:28px 23px;gap:23px}.site-footer>div{gap:20px;font-size:12px;flex-wrap:wrap}.site-footer .brand strong{font-size:17px}.portal-link{width:100%;font-size:11px}.page-shell{padding:20px 20px 40px}.catalog-hero{padding:32px 0}.catalog-hero h1{font-size:27px;letter-spacing:-.8px}.catalog-hero .lead{font-size:13px}.search-box{margin-top:22px;padding-left:12px;gap:8px}.search-box input{font-size:12px}.search-box .button{padding:6px 14px;font-size:12px;min-height:36px}.filter-row{display:block;padding:15px 0}.filter-row strong{display:block;margin-bottom:12px}.filter-row>div{gap:4px}.filter{padding:5px 12px;font-size:12px}.app-grid{grid-template-columns:1fr}.app-card{padding:23px}.app-card p{min-height:0}.app-card-top{margin-bottom:15px}.list-heading{margin-top:23px}.app-card h3{font-size:19px}.join-banner{padding:25px;display:block}.join-banner h2{font-size:21px}.join-banner .button{margin-top:18px}.join-banner p{font-size:13px}.detail-hero{padding:34px 3px 32px;gap:12px;align-items:flex-start}.detail-hero h1{font-size:30px}.detail-hero .lead{font-size:13px}.detail-hero .lead br{display:none}.detail-hero .eyebrow{font-size:12px}.detail-emblem{display:none}.identity-grid,.developer-grid,.research-grid{grid-template-columns:1fr 1fr;gap:12px}.research-grid{grid-template-columns:1fr}.info-card{padding:23px 17px}.info-card p{font-size:12px}.info-card h3{font-size:17px}.info-card small{font-size:10px}.content-section{padding:25px 0}.section-title h2{font-size:24px}.section-title p{font-size:13px}.steps{grid-template-columns:1fr 1fr;gap:25px 20px}.soft-notice{font-size:12px;padding:17px;align-items:flex-start}.soft-notice>.icon{margin-top:4px;width:20px}.space-page{padding-top:40px}.space-heading{display:block;margin-bottom:35px}.space-heading h1{font-size:27px}.space-heading .lead{font-size:13px}.space-heading .button{margin-top:22px}.saved-card{flex-wrap:wrap;padding:20px;gap:15px}.saved-card h3{font-size:15px}.saved-actions{width:100%;justify-content:flex-end}.help-page{padding-top:35px}.help-page h1{font-size:26px}.help-grid{grid-template-columns:1fr;gap:25px;margin-top:25px}.help-grid nav{flex-direction:row;flex-wrap:wrap;gap:5px 19px}.help-grid nav a{font-size:12px}.help-grid section p{font-size:14px}.help-grid section h2{font-size:21px}.workspace{min-height:calc(100vh - 108px);display:block}.workspace-sidebar{display:none;width:100%;min-height:0;padding:22px 20px 60px;border-bottom:1px solid #e1edfd}.workspace.sidebar-mobile-open .workspace-sidebar{display:block}.workspace.sidebar-mobile-open .sidebar-reopen{display:none}.workspace .sidebar-reopen{display:flex;left:12px;top:12px;width:32px;height:32px;background:#ffffffd9}.workbench-brand{gap:10px;margin-bottom:15px}.workbench-brand strong{font-size:16px}.project-row b{font-size:13px}.recent-row{font-size:12px}.sidebar-section{padding-top:15px}.sidebar-bottom{left:30px;bottom:15px}.welcome-workspace{padding:20px 20px 35px;min-height:calc(100vh - 108px)}.welcome-visual{width:290px;height:215px;margin-bottom:3px}.welcome-visual>img{width:115px;left:calc(50% - 57.5px);top:29px}.book-orbit{width:270px;left:3%;top:45px;height:100px}.welcome-visual .podium{bottom:5px}.welcome-workspace h1{font-size:25px;letter-spacing:0;margin-top:12px}.welcome-description{font-size:13px;line-height:1.9;margin-bottom:23px}.welcome-description br{display:none}.welcome-workspace .experience-label{font-size:10px}.composer{border-radius:17px;padding:14px}.composer textarea{font-size:13px;min-height:98px}.composer-toolbar>div{gap:6px}.select-wrap{font-size:10px;padding:5px;gap:0}.select-wrap select{max-width:90px}.send-button{width:35px;height:35px}.send-button .icon{width:22px}.attachment-button{width:29px;height:29px}.attachment-button>.icon{width:18px}.prompt-examples{gap:8px;font-size:10px;margin-top:18px}.prompt-examples button{font-size:10px}.welcome-workspace .static-note{font-size:10px;margin-top:18px}.design-result{display:block;padding-top:30px}.conversation{padding:16px 17px}.conversation>h2,.lesson-panel>h2{font-size:21px}.message{gap:8px;margin-bottom:19px}.message>div{padding:13px}.message p{font-size:12px}.message>.avatar,.message>.engine-icon{width:27px;height:27px}.engine-progress{padding:11px 8px}.engine-progress h3{font-size:11px}.engine-progress b{font-size:9px}.engine-progress small{font-size:8px}.engine-progress h3 .engine-icon{width:23px;height:23px}.engine-progress li>span{width:21px;height:21px}.composer-compact textarea{min-height:45px;font-size:12px}.lesson-panel{padding:16px 17px 30px}.lesson-heading h3{font-size:14px}.lesson-heading .tags{gap:4px}.lesson-heading .tags span{font-size:10px}.preview-card{padding:18px 13px}.resource-card{padding:9px 6px;gap:6px}.resource-card b{font-size:10px}.resource-card small{font-size:9px}.preview-actions .button{padding:10px 9px;font-size:11px}.quick-tuning button{font-size:10px;padding:6px 9px}.toast{font-size:12px;padding:11px 18px;text-align:center;width:max-content}}
.conversation>h2[tabindex="-1"]:focus{outline:none}
@media(max-width:700px){.panel-main{padding:19px 14px}.panel-main>span{font-size:16px}.panel-main img{margin:23px auto 18px}.panel-main b{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}