@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;600;700&family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap');
:root{--blue:#2069ed;--navy:#10285b;--orange:#ff742d;--sky:#eaf5ff;--ink:#10285b;--muted:#6b7b98;--line:#dce8f4;--card:#fff;--radius:18px}*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:'Noto Sans SC',system-ui,sans-serif;background:#f7fbff}a{text-decoration:none;color:inherit}.nav{height:74px;background:#fff;display:flex;align-items:center;padding:0 max(28px,calc((100% - 1360px)/2));gap:42px;position:sticky;top:0;z-index:10;border-bottom:1px solid #edf3f9}.brand{display:flex;align-items:center;gap:10px;min-width:260px}.brand-mark{display:grid;place-items:center;width:41px;height:41px;color:#fff;font-size:25px;font-weight:800;background:var(--blue);border-radius:13px 13px 13px 4px;transform:rotate(-5deg)}.brand b{font-size:21px;letter-spacing:-1px}.brand small{display:block;color:#7990ae;font-size:10px;margin-top:2px}.nav nav{display:flex;gap:30px;font-weight:600;white-space:nowrap}.nav nav a{padding:25px 0;border-bottom:3px solid transparent}.nav nav .active{color:var(--blue);border-color:var(--blue)}.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}.search{display:flex;align-items:center;gap:8px;background:#f4f8fd;border:1px solid #e3edf7;border-radius:24px;padding:0 16px;width:260px;height:40px;color:var(--blue)}.search input{border:0;outline:0;background:transparent;width:100%;font:inherit;font-size:13px}.btn{border:0;border-radius:11px;height:40px;padding:0 20px;font:600 14px inherit;cursor:pointer;transition:.2s;white-space:nowrap}.btn:hover{transform:translateY(-1px);filter:brightness(.98)}.btn.blue{background:var(--blue);color:#fff}.btn.orange{background:var(--orange);color:#fff}.btn.ghost{background:#fff;color:var(--blue);border:1px solid #bdd5f6}.btn.big{height:48px;padding:0 24px;font-size:16px}main{max-width:1360px;margin:auto;padding:0 24px}.hero{margin-top:22px;background:linear-gradient(115deg,#f2f9ff,#d9eeff);border-radius:26px;min-height:310px;display:grid;grid-template-columns:1fr 1fr;overflow:hidden;position:relative}.hero-copy{padding:54px 56px;position:relative;z-index:1}.eyebrow{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.08em}.hero h1{font-size:44px;line-height:1.13;margin:13px 0 14px;letter-spacing:-2px}.hero h1 em{font-style:normal;color:var(--blue)}.hero p{max-width:410px;color:#587092;line-height:1.7;margin:0 0 22px}.hero-art{position:relative;min-height:310px}.board{position:absolute;right:40px;top:36px;width:440px;height:235px;background:#fff;border-radius:22px 22px 12px 12px;border:9px solid #fff;box-shadow:0 18px 40px #82addd55;transform:rotate(-2deg)}.screen{height:100%;border-radius:14px;background:linear-gradient(140deg,#1c83d9,#7fd9ff);padding:20px 24px;color:#fff;position:relative;overflow:hidden}.screen span{font-size:12px;opacity:.85}.screen strong{display:block;font-size:27px;line-height:1.2;margin-top:12px;letter-spacing:-1px}.orbit{position:absolute;border:2px solid #ffffff80;border-radius:50%;width:170px;height:80px;right:34px;bottom:25px;transform:rotate(-20deg)}.o2{width:110px;height:50px;right:60px;bottom:40px;transform:rotate(40deg)}.teacher{position:absolute;right:-5px;bottom:-25px;background:#ffca9c;width:82px;height:82px;border-radius:50%;border:7px solid #fff;display:grid;place-items:center;font-size:24px;color:#3d2b35}.student{position:absolute;bottom:-22px;width:62px;height:62px;border-radius:50%;background:#f3b077;border:6px solid #fff}.s1{left:55px}.s2{left:130px;background:#713f60}.sun{position:absolute;right:20px;top:9px;color:#ffb547;font-size:48px;transform:rotate(15deg)}.doodle{position:absolute;right:17px;bottom:16px;color:#2167bf;font-size:15px;transform:rotate(7deg);line-height:1.35}.doodle b{font-size:20px}.filters{background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px 20px;margin-top:18px;box-shadow:0 6px 18px #266bc00d}.filter-row{display:flex;align-items:center;gap:12px;min-height:36px}.filter-row+ .filter-row{border-top:1px solid #f0f5fa;margin-top:8px;padding-top:8px}.filter-row b{width:44px;font-size:13px}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{border:0;background:#f5f8fc;color:#536783;border-radius:20px;padding:8px 16px;font:500 13px inherit;cursor:pointer}.chip.active{background:var(--blue);color:#fff}.filter-row select{margin-left:auto;border:1px solid var(--line);border-radius:10px;padding:9px 12px;color:#526582;background:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;padding:34px 2px 16px}.section-head h2{font-size:26px;margin:6px 0 0;letter-spacing:-1px}.muted{color:var(--muted);font-size:13px}.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;min-height:300px;transition:.22s}.tool-card:hover{transform:translateY(-4px);box-shadow:0 16px 30px #246bd31c}.tool-cover{height:128px;margin:10px 10px 0;border-radius:13px;display:grid;place-items:center;position:relative;overflow:hidden}.tool-cover:before{content:'';position:absolute;width:180px;height:80px;border:2px solid #fff8;border-radius:50%;transform:rotate(-20deg)}.tool-cover .cover-icon{font-size:42px;z-index:1}.tool-body{padding:10px 15px 14px;display:flex;flex-direction:column;flex:1}.tool-body h3{font-size:17px;margin:0 0 7px}.tool-body p{font-size:12px;line-height:1.6;color:#7686a0;margin:0 0 10px}.tag{color:#28945b;background:#effaf2;border-radius:5px;padding:4px 8px;display:inline-block;font-size:11px;align-self:flex-start}.tool-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px}.use{height:34px;padding:0 15px;font-size:12px}.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0 45px}.feature-strip>div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 25px;min-height:142px}.feature-strip>div:first-child{background:#fff5e9;border-color:#ffe1b8}.feature-strip>div:nth-child(2){background:#eef8ff}.feature-strip>div:nth-child(3){background:#edf9f0}.strip-icon{font-size:30px;color:var(--blue);float:right}.feature-strip h3{margin:0 0 5px;font-size:18px}.feature-strip p{margin:0 0 12px;color:#657995;font-size:13px}.modal{position:fixed;inset:0;background:#10285b55;display:grid;place-items:center;z-index:20}.hidden{display:none!important}.modal-card{width:min(420px,calc(100% - 32px));background:#fff;border-radius:20px;padding:32px;position:relative;box-shadow:0 20px 60px #0c2b5c33}.modal-card h2{margin:10px 0 20px}.modal-card form{display:grid;gap:12px}.modal-card input{height:46px;border:1px solid var(--line);border-radius:10px;padding:0 13px;font:inherit}.close{position:absolute;right:17px;top:12px;border:0;background:none;font-size:26px;color:#8091ab;cursor:pointer}.form-msg{color:var(--orange);font-size:13px;margin-top:8px}.admin-page{background:#f3f8fd}.admin-wrap{display:grid;grid-template-columns:190px 1fr;gap:22px;padding-top:28px}.side{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;height:max-content;display:grid;gap:5px}.side a,.side-active{padding:12px 14px;border-radius:9px;font-size:14px}.side-active{background:#eaf3ff;color:var(--blue);font-weight:700}.admin-main{min-width:0}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:16px}.stat,.panel{background:#fff;border:1px solid var(--line);border-radius:16px}.stat{padding:18px 20px}.stat small,.stat span{display:block;color:#7185a2;font-size:12px}.stat strong{display:block;font-size:30px;margin:4px 0}.panel{padding:24px;margin-bottom:16px}.panel-head{display:flex;justify-content:space-between;align-items:start;margin-bottom:20px}.panel h2{margin:6px 0 0;font-size:21px}.hint{font-size:12px;color:#7b8da5}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid label,.inline-form label{display:grid;gap:7px;font-size:13px;color:#4c6381}.form-grid input,.form-grid select,.form-grid textarea,.inline-form input{border:1px solid var(--line);border-radius:9px;padding:10px;font:inherit}.full{grid-column:1/-1}.file-drop{border:1px dashed #8eb8ed;background:#f7fbff;padding:19px;border-radius:10px;text-align:center}.inline-form{display:flex;align-items:end;gap:10px;margin-bottom:17px}.inline-form input{width:90px}.codes{background:#f3f8ff;border-radius:10px;padding:12px;word-break:break-all;color:var(--blue);font-weight:700;margin-bottom:15px;display:none}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:11px 8px;border-bottom:1px solid #eef3f8}th{color:#6e819d}.admin-tools{display:grid;gap:10px}.admin-tool{display:flex;align-items:center;gap:12px;border-bottom:1px solid #eef3f8;padding:10px 0}.admin-tool .mini-cover{width:60px;height:44px;border-radius:8px}.admin-tool strong{flex:1}.admin-tool span{font-size:12px;color:#789}
@media(max-width:980px){.nav{gap:18px;padding:0 18px}.brand{min-width:auto}.nav nav{display:none}.search{width:180px}.hero{grid-template-columns:1fr}.hero-art{min-height:260px}.hero-copy{padding:40px 30px 20px}.board{right:10%;top:15px}.tool-grid{grid-template-columns:repeat(2,1fr)}.admin-wrap{grid-template-columns:1fr}.side{display:flex;overflow:auto}.side a,.side-active{white-space:nowrap}.feature-strip{grid-template-columns:1fr}}
@media(max-width:560px){.nav{height:64px}.brand small{display:none}.brand b{font-size:18px}.nav-actions .search{display:none}.nav-actions .btn{padding:0 12px}.hero h1{font-size:34px}.hero-art{min-height:220px}.board{width:330px;height:180px;right:5%;top:16px}.screen strong{font-size:20px}.tool-grid{grid-template-columns:1fr}.filters{padding:12px}.filter-row{align-items:start}.filter-row select{display:none}.feature-strip{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.inline-form{flex-wrap:wrap}}