@import "https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap";:root{--bg:#0b141c;--panel:#13212c;--line:#ffffff12;--muted:#9cabb7;--mint:#a9efd4;--gold:#f2ce85;--text:#f2f6f5;--sans:"DM Sans","Microsoft YaHei",sans-serif;--display:"Outfit","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:var(--sans);margin:0;font-size:16px;line-height:1.55}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.42}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:4px}input:focus,select:focus{outline:2px solid var(--mint);outline-offset:2px}button{transition:background .18s,transform .18s,border-color .18s}button:not(:disabled):active{transform:scale(.98)}h1,h2,h3,p{margin:0}svg{flex-shrink:0}input,select{min-width:0;color:var(--text);background:#0b1822;border:1px solid #fff2;border-radius:12px;min-height:48px;padding:13px 15px}label{color:#bbc9d0;flex-direction:column;gap:8px;font-size:14px;display:flex}small{font-size:13px}.topbar{border-bottom:1px solid var(--line);background:#0c161f;justify-content:space-between;align-items:center;height:90px;padding:0 4.5%;display:flex}.brand{font-family:var(--display);letter-spacing:1.6px;white-space:nowrap;align-items:center;gap:12px;font-size:17px;display:flex}.brand b{color:var(--mint);font-weight:400}.brand small{color:var(--muted);font-family:var(--sans);letter-spacing:2px;margin-top:3px;font-size:12px;display:block}.brand-icon{background:var(--mint);color:#15352e;border-radius:13px;place-items:center;width:42px;height:42px;display:grid;transform:rotate(-7deg)}.top-actions{align-items:center;gap:17px;display:flex}.unit-label{letter-spacing:1.6px;color:#8ea3af;margin-right:12px;font-size:12px}.icon-button{color:#b8c8d0;background:0 0;border:1px solid #ffffff15;border-radius:50%;place-items:center;width:38px;height:38px;display:grid}.icon-button:hover{background:#ffffff10}.teacher-link{border-left:1px solid #fff2;align-items:center;gap:8px;padding-left:23px;font-size:14px;display:flex}.welcome,.game-main,.dashboard{max-width:1480px;margin:auto;padding:32px 4.5% 0}.hero{background:#10212b;border:1px solid #ffffff16;border-radius:26px;min-height:575px;display:flex;position:relative;overflow:hidden}.hero-art{position:absolute;inset:0 0 0 37%}.hero-art img{object-fit:cover;object-position:right center;width:100%;height:100%}.hero-art:after{content:"";background:linear-gradient(90deg,#10212b 0%,#10212bdd 8%,#0000 45%),linear-gradient(#0000 72%,#10212bdd 100%);position:absolute;inset:0}.art-caption{z-index:1;color:#d6ddd8;align-items:center;gap:20px;font-size:13px;display:flex;position:absolute;bottom:26px;right:35px}.art-caption span:first-child{letter-spacing:2.5px;color:var(--gold);font-size:11px}.hero-copy{z-index:2;width:54%;padding:47px 44px 35px;position:relative}.eyebrow{font-family:var(--display);letter-spacing:2.7px;color:var(--mint);align-items:center;gap:10px;font-size:12px;font-weight:500;display:flex}.tiny-line{background:var(--mint);width:23px;height:1px}.hero h1{letter-spacing:2px;margin-top:22px;font-size:clamp(36px,3.6vw,56px);font-weight:700;line-height:1.3}.hero h1 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#ffffff20}.secondary:hover:not(:disabled){background:#ffffff0d}.text-button{color:#a9c3c8;background:0 0;border:0;align-items:center;gap:6px;padding:10px;font-size:14px;display:inline-flex}.text-button:hover{color:var(--mint)}.hero-foot{color:#829ca8;letter-spacing:.4px;align-items:center;gap:8px;margin-top:32px;font-size:12px;display:flex}.micro-disc{display:flex}.route-map{grid-template-columns:repeat(3,1fr);gap:17px;margin-top:22px;display:grid}.route-card{background:#101e28;border:1px solid #ffffff12;border-radius:17px;align-items:center;gap:16px;padding:25px 22px;display:flex;position:relative}.route-num{font:400 40px var(--display);color:#38524f}.route-1 .route-num{color:#575040}.route-2 .route-num{color:#394c64}.route-card small{letter-spacing:1.8px;color:#9bc8b7;font-size:10px}.route-1 small{color:#d9bc83}.route-2 small{color:#a4bcd9}.route-card h3{letter-spacing:1px;margin:4px 0;font-size:17px;font-weight:500}.route-card p{color:#7f96a3;font-size:12px}.route-symbol{color:#ffffff13;position:absolute;top:18px;right:16px}.page-footer{color:#758b99;justify-content:space-between;align-items:center;gap:15px;padding:25px 0;font-size:12px;display:flex}.page-footer span{align-items:center;gap:7px;display:flex}.join-form{margin-top:20px}.field-row{grid-template-columns:1.5fr 1fr;gap:12px;margin-bottom:14px;display:grid}.join-form .primary{padding:12px 20px}.error{color:#ffc3b1;background:#e4856814;border:1px solid #ffbba52b;border-radius:10px;margin:12px 0;padding:12px 16px;font-size:14px}.session-chip{color:#c4d4d8;border:1px solid #ffffff1c;border-radius:30px;padding:7px 16px;font-size:13px}.stage-nav{justify-content:space-between;align-items:center;gap:18px;margin:1px 0 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#ffffff0e;flex-direction:column;display:flex;position:relative;overflow:hidden}.aside-top{z-index:2;padding:32px 28px}.aside-top h2{letter-spacing:1px;margin-top:18px;font-size:27px;font-weight:500;line-height:1.55}.aside-art{opacity:.5;position:absolute;inset:28% 0 10%}.aside-art img{object-fit:cover;object-position:45% center;width:100%;height:100%}.aside-art:after{content:"";background:linear-gradient(#132a30 0%,#0000 25%,#132a30 92%);position:absolute;inset:0}.aside-bottom{z-index:2;margin-top:auto;padding:36px 28px 28px}.ticket-label{font:12px var(--display);letter-spacing:2px;color:var(--gold)}.aside-bottom p{color:#b2c8c8;margin-top:10px;font-size:14px;line-height:1.8}.aside-bottom small{color:#7faaa5;margin-top:9px;display:block}.aside-progress{background:#ffffff12;border-radius:10px;height:3px;margin-top:23px;overflow:hidden}.aside-progress span{background:var(--mint);height:100%;display:block}.question-area{flex-direction:column;padding:28px 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.stars{justify-content:center;margin:25px}.level-unlocked .primary{margin-top:10px}.level-unlocked .row-actions{justify-content:center;margin-top:25px}.spin{animation:1s linear infinite spin}.dashboard{padding-top:36px}.dashboard-title{justify-content:space-between;align-items:center;margin-bottom:30px;display:flex}.dashboard-title h1{margin:10px 0;font-size:29px}.dashboard-title p{color:#8da5b2;font-size:14px}.class-toolbar{justify-content:space-between;align-items:end;gap:25px;padding:20px 25px;display:flex}.class-toolbar form{flex:1;align-items:end;gap:12px;display:flex}.class-toolbar form label{flex:1;max-width:310px}.class-toolbar>label{width:330px}.dashboard-empty{text-align:center;color:#9bb4bf;margin-top:25px;padding:65px 20px}.dashboard-empty>svg{color:var(--mint);margin:0 auto 20px}.dashboard-empty h2{color:#e4efed;font-size:28px}.dashboard-empty p{margin:16px 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h3{margin-top:5px;font-size:22px}.invite-panel p{color:#8eaab4;margin-top:3px;font-size:13px}.class-code{font:25px var(--display);letter-spacing:4px;color:var(--mint);margin:8px 0}.share-link{gap:10px;max-width:650px;display:flex}.share-link input{width:100%;min-height:40px;padding:9px 12px;font-size:12px}.share-link .secondary{min-height:40px;padding:9px 15px;font-size:13px}.metric-grid{grid-template-columns:repeat(4,1fr);gap:15px;margin:22px 0;display:grid}.metric{background:#13232e;border:1px solid #ffffff13;border-radius:18px;padding:22px 24px;position:relative}.metric>svg{color:#6d948a;width:20px;position:absolute;top:24px;right:22px}.metric>span{color:#93adb8;font-size:13px}.metric strong{font:40px var(--display);margin-top:12px;display:block}.metric strong small{font:13px var(--sans);color:#76929d;margin-left:8px}.analytics-grid{grid-template-columns:1fr 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