:root{--navy:#092c72;--navy2:#061d4c;--royal:#1671e6;--blue:#1585ed;--sky:#e7f3ff;--text:#102b55;--muted:#60738d;--border:#d9e7f4;--yellow:#ffd14b;--white:#fff;--bg:#f6faff;--shadow:0 17px 42px rgba(19,62,120,.09);--radius:22px;--scale:1}
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.97fr;align-items:center;gap:40px;padding-top:66px;padding-bottom:79px;position:relative}.hero h1{font-size:clamp(2.75rem,5.6vw,5.2rem);font-weight:900;line-height:1.06;letter-spacing:-.055em;color:#0a2c73;margin:22px 0}.hero h1 em{font-style:normal;color:#086adb}.hero .lead{font-size:1.09rem;max-width:555px}.hero .btn-row{margin-top:27px}.hero-tags{display:flex;flex-wrap:wrap;gap:11px;margin-top:28px}.hero-tags span{font-size:.8rem;color:#20528c;font-weight:750;padding:7px 12px;border-radius:99px;background:white;border:1px solid #d8e9fa}.hero-visual{align-self:stretch;min-height:400px;position:relative;display:flex;align-items:center}.hero-photo{width:100%;height:390px;overflow:hidden;border:9px solid white;border-radius:32px;box-shadow:0 20px 60px #0a4f9950;transform:rotate(1deg);background:linear-gradient(#e8f7ff,#a5dafc)}.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:center 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p{font-size:.89rem;color:#65738c;margin:0 0 14px}.track-copy .card-tag{font-size:.73rem;color:#1261bf;font-weight:800}.track-arrow{position:absolute;bottom:22px;right:26px;color:#156ce0;font-size:1.5rem}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}.feature-card{background:#fff;border-radius:19px;padding:22px 20px;border:1px solid #e1eafb;box-shadow:0 7px 25px #1c55910c}.feature-card .emoji{font-size:2rem}.feature-card h3{font-size:1rem;margin:13px 0 8px}.feature-card p{color:#677a93;font-size:.84rem;margin:0}.soft-area{background:#eff7ff}.page-intro{background:linear-gradient(120deg,#f0f8ff,#fff);padding:39px 0 35px;border-bottom:1px solid #e2eef8}.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:#6b7b91;font-size:.8rem;font-weight:700;margin-bottom:15px}.breadcrumb a{color:#0f67cd}.breadcrumb span:last-child{color:#173d81}.selector-panel{background:white;padding:24px;border-radius:22px;border:1px solid #dfeaf7;box-shadow:var(--shadow)}.field-title{font-weight:800;color:#15386e;font-size:.88rem;margin:0 0 10px}.seg-row{display:flex;gap:9px;flex-wrap:wrap}.seg-btn{border:1px solid #cadbea;background:white;padding:10px 16px;border-radius:12px;color:#31557f;font-weight:800}.seg-btn.active{background:#0a62d6;color:white;border-color:#0a62d6}.seg-btn:disabled{color:#849bb5;background:#f1f5fb;border-color:#e6eef5}.selector-line{display:grid;grid-template-columns:1fr 1fr 1fr;gap:22px}.control-group{display:flex;flex-direction:column;min-width:0}.select-control,.search-control{width:100%;border:1px solid #cbdced;border-radius:12px;background:#fff;color:#1c3f6d;padding:11px 13px;min-height:44px}.topics-layout{display:grid;grid-template-columns:245px 1fr;gap:22px;align-items:start}.topic-aside{position:sticky;top:111px;border:1px solid #dbe9f7;border-radius:20px;background:#fff;padding:18px;box-shadow:0 7px 17px #0d4d9b0d}.topic-aside h3{font-size:1.05rem;margin:0 0 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#ffffff44;border-radius:13px;padding:10px 16px;white-space:nowrap}.topic-toolbar{display:flex;justify-content:space-between;gap:15px;align-items:center;margin:19px 0}.topic-list{display:grid;gap:11px}.topic-row{display:flex;align-items:center;gap:16px;background:white;border:1px solid #dce7f3;border-radius:16px;padding:17px 19px;transition:.15s;min-width:0}.topic-row:hover{box-shadow:0 7px 23px #114a9b16;border-color:#88bae9}.topic-n{background:#e8f3ff;color:#0b5cb4;display:grid;place-items:center;height:39px;min-width:39px;border-radius:13px;font-weight:800}.topic-details{flex:1;min-width:0}.topic-details strong{display:block;font-size:.94rem;line-height:1.4}.topic-details small{display:block;color:#73849a;font-size:.75rem;margin-top:6px}.topic-cta{font-weight:900;color:#0d64d2;border:1px solid #cce1fa;border-radius:11px;background:#f6fbff;padding:10px 15px;white-space:nowrap}.topic-row:hover .topic-cta{background:#096ae1;color:white}.notice{background:#fff9e8;border:1px solid #f5dd94;border-radius:14px;padding:13px 16px;color:#755414;font-size:.88rem}.empty-card{padding:40px 27px;text-align:center;border-radius:20px;background:#fff;border:1px dashed #b7d3f2}.empty-card h3{margin:0 0 5px}.empty-card p{margin:0 0 18px;color:#6e7f95}.objectives{display:grid;gap:10px;margin-top:18px}.objective{padding:12px 14px;border:1px solid #d6e6fa;background:white;border-radius:13px;display:flex;align-items:flex-start;gap:13px;font-size:.88rem}.objective code{display:inline-block;font:800 .79rem 'Segoe UI',Arial,sans-serif;color:#1268c9;padding:4px 7px;background:#eaf4ff;border-radius:7px;white-space:nowrap}.lesson-hero{background:linear-gradient(115deg,#08398e,#0a68dd);color:#fff;border-radius:25px;padding:31px 34px;display:flex;justify-content:space-between;align-items:center;gap:23px;position:relative;overflow:hidden}.lesson-hero:after{content:'∑';position:absolute;right:18%;top:-66px;font-size:19rem;opacity:.045;font-weight:900;pointer-events:none}.lesson-hero small{color:#c9e2ff;font-weight:750}.lesson-hero h1{font-size:clamp(1.65rem,3.6vw,2.75rem);max-width:780px;line-height:1.18;margin:10px 0 10px}.lesson-hero p{font-size:.85rem;color:#dbeaff;margin:0}.lesson-hero-icon{height:86px;width:86px;background:#ffffff22;border:1px solid #ffffff33;border-radius:23px;display:grid;place-items:center;font-size:3rem;flex-shrink:0}.lesson-block-title{font-size:1.55rem;line-height:1.3;margin:35px 0 18px}.lesson-modules{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.module-btn{border:1px solid #d8e6f5;border-radius:18px;background:white;box-shadow:0 6px 19px #0e458b10;text-align:left;padding:18px 15px;color:#14355e;min-height:156px;transition:.14s;display:flex;flex-direction:column;align-items:flex-start;gap:9px}.module-btn.active,.module-btn:hover{border-color:#1284e5;box-shadow:0 10px 25px #1b76bb21}.module-ico{width:45px;height:45px;background:#e7f3ff;color:#1168ca;border-radius:13px;display:grid;place-items:center;font-size:1.47rem}.module-btn:nth-child(2) .module-ico{background:#e9ebff;color:#5941bb}.module-btn:nth-child(4) .module-ico{background:#fff2d9;color:#a66c00}.module-btn:nth-child(6) .module-ico{background:#eaf8ed;color:#187c48}.module-btn b{font-size:.89rem;line-height:1.25}.module-btn small{font-size:.73rem;color:#718298;line-height:1.35}.lesson-workspace{background:white;border:1px solid #dce9f8;border-radius:21px;margin-top:19px;padding:26px;box-shadow:0 9px 26px #204d8212;min-height:170px}.lesson-workspace h3{margin:0 0 12px;font-size:1.25rem;color:#113c80}.workspace-help{color:#637a91;font-size:.87rem;margin:0 0 20px}.workspace-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.vocab-card{background:linear-gradient(130deg,#f0f8ff,#edf2ff);border-radius:20px;padding:25px;text-align:center;max-width:540px;margin:0 auto}.vocab-word{font-size:clamp(2rem,6vw,3.5rem);font-weight:900;color:#0a4196;margin:10px 0}.vocab-small{font-size:.8rem;color:#63809d;font-weight:800;letter-spacing:.08em}.theory-card{background:#f2f8ff;border:1px solid #d6eafb;padding:21px;border-radius:15px}.theory-formula{font-size:clamp(1.6rem,4vw,2.2rem);font-weight:850;color:#0a64d2;margin:12px 0}.theory-illustration{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:14px 0}.math-tile{padding:11px 14px;border-radius:10px;background:#dceaff;font-weight:850;color:#10468a}.mini-game{display:grid;grid-template-columns:1fr 1fr;gap:18px}.game-side{border:1px solid #dbe8f5;border-radius:17px;padding:20px;background:#fbfdff}.game-side h4{margin:0 0 8px;font-size:1.06rem}.game-side h4 span{font-weight:550;color:#68809b;font-size:.8rem}.math-question{font-size:clamp(1.7rem,4vw,2.5rem);color:#0f4795;font-weight:900;margin:12px 0 15px}.game-side input{min-width:0;width:100%;padding:11px 14px;border-radius:12px;border:1px solid #c1d8f3;background:white;font-size:1.1rem}.game-side .btn{width:100%;margin-top:10px}.scoreboard{display:flex;gap:9px;align-items:center;color:#2362a4;font-size:.82rem;font-weight:800}.scoreboard strong{background:#e7f2ff;padding:5px 10px;border-radius:8px}.tug-track{width:100%;height:17px;background:linear-gradient(90deg,#eadfff 0 50%,#d2f2f8 50% 100%);border-radius:50px;position:relative;margin:19px 0}.tug-marker{width:31px;height:31px;border-radius:50%;background:#ffb62b;border:5px solid white;box-shadow:0 1px 9px #183c8f44;position:absolute;top:50%;transform:translate(-50%,-50%);transition:left .23s}.timer-layout{display:grid;grid-template-columns:1fr 1.3fr;gap:25px;align-items:center}.timer-ring{display:grid;place-items:center;border-radius:50%;height:215px;width:215px;margin:auto;background:conic-gradient(#176dde var(--timer-progress,0%),#e5f1ff 0);padding:13px}.timer-inner{width:100%;height:100%;border-radius:50%;background:#fff;display:grid;place-content:center;text-align:center}.timer-number{font-size:2.65rem;color:#084ca7;font-weight:900;font-variant-numeric:tabular-nums}.timer-inner small{font-size:.8rem;color:#6a7f9c}.move-title{font-size:1.6rem;font-weight:900;color:#123f8c}.move-intro{font-size:.94rem;color:#6c8094}.reactions{display:flex;gap:12px;flex-wrap:wrap}.reaction{min-width:135px;padding:18px;border-radius:15px;border:2px solid #d8e6f4;background:white;display:flex;flex-direction:column;align-items:center;gap:7px;font-weight:850;color:#274877}.reaction span{font-size:2.2rem}.reaction.active,.reaction:hover{background:#eaf5ff;border-color:#1579de}.screen-preview{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;align-items:center}.screen-preview img{border-radius:14px;box-shadow:0 9px 30px #1d4c781e}.resource-list{display:grid;gap:14px}.resource{padding:20px 23px;border-radius:18px;border:1px solid #d9e7f3;background:#fff;display:flex;justify-content:space-between;gap:20px;align-items:center}.resource-icon{font-size:2rem;flex-shrink:0}.resource-title{font-weight:850;margin:0 0 5px}.resource p{margin:0;color:#6b7f98;font-size:.84rem}.resource a{white-space:nowrap}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.about-card{background:#fff;border:1px solid #dde9f6;border-radius:21px;padding:26px;box-shadow:0 9px 19px #2357860d}.about-card h3{margin:4px 0 11px;font-size:1.25rem}.about-card p{color:#657a92;font-size:.92rem;margin:0}.site-footer{background:#061f52;color:#d6e6ff;margin-top:65px}.footer-grid{padding-top:48px;padding-bottom:41px;display:grid;grid-template-columns:2fr 1fr 1.6fr;gap:55px}.footer-name{font-size:1.5rem;color:#fff;font-weight:900;letter-spacing:.03em}.dot{color:var(--yellow)}.footer-grid p{font-size:.86rem;line-height:1.7;color:#b8cce8;max-width:400px;margin:10px 0}.footer-grid strong{display:block;color:white;font-size:.91rem;margin-bottom:12px}.footer-grid a{display:block;font-size:.86rem;color:#c6daf9;margin:9px 0}.footer-grid a:hover{color:white}.footer-bottom{border-top:1px solid #ffffff24;display:flex;justify-content:space-between;gap:15px;padding-top:18px;padding-bottom:20px;color:#99b4d9;font-size:.74rem}.info-note{font-size:.83rem;color:#66809b;margin:14px 0 0}.tagline-cards{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.tagline-card{padding:8px 14px;border-radius:11px;font-size:.8rem;font-weight:800;color:#1954a1;background:#eaf4ff}.progress-line{height:8px;border-radius:40px;background:#dbeafd;overflow:hidden;margin:15px 0}.progress-line span{display:block;height:100%;background:linear-gradient(90deg,#0a65d2,#4ec7e5);border-radius:40px}.small-link{color:#0d66c9;text-decoration:underline;text-underline-offset:3px}.content-narrow{max-width:860px}.content-wide{max-width:1120px}.mt-0{margin-top:0!important}.mt-1{margin-top:12px}.mt-2{margin-top:24px}.mt-3{margin-top:36px}.mb-1{margin-bottom:12px}.mb-2{margin-bottom:24px}.flex-between{display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}.icon-label{display:flex;align-items:center;gap:9px}.pill-note{background:#e5f2ff;color:#155baf;border-radius:100px;padding:7px 11px;font-size:.8rem;font-weight:750}
@media(max-width:1150px){.header-inner{gap:15px;padding:0 20px}.brand{min-width:260px}.brand-copy strong{font-size:1.12rem}.main-nav a{padding:10px}.hero-grid{gap:19px}.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:910px){.mobile-menu-btn{display:block;margin-left:auto}.main-nav{display:none;position:absolute;top:84px;left:0;right:0;background:#092c72;padding:14px 22px 20px;box-shadow:0 12px 18px #0c2f682e;flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{padding:12px 17px}.header-inner{min-height:84px}.header-actions{margin-left:0}.hero-grid{grid-template-columns:1fr;gap:30px;padding-top:53px}.hero-visual{min-height:300px;max-width:640px;width:100%;margin:auto}.hero-photo{height:310px}.hero h1{font-size:3.65rem}.stat-strip{grid-template-columns:repeat(2,1fr)}.selector-line{grid-template-columns:1fr 1fr}.topics-layout{grid-template-columns:1fr}.topic-aside{position:static}.lesson-modules{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{gap:25px}}
@media(max-width:650px){.page-width{padding-left:18px;padding-right:18px}.header-inner{min-height:72px}.brand{min-width:0}.brand-symbol{width:37px;height:37px}.brand-copy strong{font-size:1rem}.brand-copy small{font-size:.57rem}.header-actions{gap:5px}.font-adjust{display:none}.lang-toggle button{padding:6px;font-size:.69rem}.main-nav{top:72px}.hero-grid{padding-top:42px;padding-bottom:62px}.hero h1{font-size:2.85rem}.hero .lead{font-size:.97rem}.hero-photo{height:275px;border-width:6px}.hero-visual{min-height:277px}.visual-badge{left:2px;bottom:5px;padding:8px 10px}.hero-corner{right:0;top:0}.stat-strip{gap:8px}.stat-box{padding:12px 10px;gap:9px}.stat-icon{min-width:35px;height:35px}.stat-box b{font-size:.92rem}.stat-box small{font-size:.67rem}.section{padding-top:46px;padding-bottom:48px}.section-head{display:block}.section-head h2{font-size:2rem}.course-choice-grid,.about-grid,.selector-line,.mini-game,.timer-layout,.screen-preview{grid-template-columns:1fr}.track-card{min-height:0;padding:20px;gap:12px}.track-icon{width:50px;height:50px;border-radius:15px}.track-icon svg{width:27px}.track-copy h3{font-size:1.1rem}.feature-grid{grid-template-columns:1fr 1fr;gap:9px}.feature-card{padding:15px}.feature-card p{font-size:.78rem}.selector-panel{padding:15px}.course-intro-card{padding:21px;align-items:start}.course-intro-card h2{font-size:1.38rem}.course-intro-card strong{font-size:1rem}.topic-row{padding:13px 12px;gap:9px}.topic-n{min-width:31px;height:31px;border-radius:8px}.topic-details strong{font-size:.85rem}.topic-cta{padding:7px 9px;font-size:.74rem}.lesson-hero{padding:25px 21px}.lesson-hero-icon{display:none}.lesson-modules{gap:9px}.module-btn{padding:14px 12px;min-height:150px}.module-btn b{font-size:.8rem}.module-btn small{font-size:.7rem}.lesson-workspace{padding:18px 13px}.objective{display:block}.objective code{margin-bottom:6px}.resource{flex-direction:column;align-items:flex-start}.footer-grid{grid-template-columns:1fr;gap:14px;padding-top:33px;padding-bottom:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:6px}.btn{font-size:.87rem}.reactions .reaction{flex:1;min-width:89px;padding:12px 7px;font-size:.8rem}.reactions .reaction span{font-size:1.9rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}