@charset "UTF-8";:root{--ink:#17213a;--muted:#59647b;--paper:#f7f2e7;--white:#fffdfa;--blue:#244da0;--blue2:#153477;--amber:#e7a732;--line:#d6d0c2;--shadow:0 22px 65px rgba(40,45,61,.13)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Inter,"Noto Sans SC","PingFang SC",sans-serif;line-height:1.75}a{color:inherit}p{margin:.4rem 0 1rem}.site-head{height:78px;max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px}.wordmark{display:flex;align-items:center;gap:12px;text-decoration:none}.wordmark>span{display:grid;place-items:center;width:42px;height:42px;background:var(--blue);color:white;font-weight:900}.wordmark b{line-height:1.15}.wordmark small{display:block;color:var(--muted);font-size:10px;letter-spacing:.15em;margin-top:4px}.site-head nav{display:flex;gap:28px}.site-head nav a{text-decoration:none;font-size:14px}.site-head nav a[aria-current=page]{color:var(--blue);font-weight:800}.site-head button{display:none}.hero{max-width:1180px;margin:30px auto 80px;min-height:520px;padding:60px;display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;background:var(--white);box-shadow:var(--shadow);position:relative}.hero:before{content:"";position:absolute;left:0;top:0;bottom:0;width:9px;background:var(--blue)}.eyebrow{font-size:11px;font-weight:900;letter-spacing:.2em;color:var(--blue)}h1,h2,h3{line-height:1.18;margin:.35em 0}.hero h1{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(42px,5vw,70px);font-weight:600}.hero h1 em{color:var(--blue);font-style:normal}.hero-copy>p:not(.eyebrow){max-width:620px;color:var(--muted);font-size:17px}.actions{display:flex;gap:12px;margin-top:28px}.actions a,.next,.receipt>a,.device-course a,.about-page>a,.missing>a{display:inline-block;text-decoration:none;background:var(--blue);color:#fff;padding:12px 20px;font-weight:800}.actions a+ a{background:transparent;color:var(--blue);border:1px solid var(--blue)}.hero-photo{margin:0;position:relative;overflow:hidden;box-shadow:12px 15px 0 rgba(36,77,160,.1)}.hero-photo img{display:block;width:100%;height:430px;object-fit:cover}.hero-photo figcaption{position:absolute;right:14px;bottom:12px;background:rgb(255,253,250);padding:7px 11px;font-size:11px;font-weight:900;letter-spacing:.08em}.course-sheet{background:#f2ead8;border:1px solid #cfc5b2;padding:25px 25px 22px;transform:rotate(1deg);box-shadow:12px 15px 0 rgba(36,77,160,.1);position:relative}.sheet-top{display:flex;justify-content:space-between;border-bottom:2px solid var(--ink);padding-bottom:12px}.sheet-top span{font-size:11px;letter-spacing:.15em}.course-sheet ol{list-style:none;margin:18px 0 8px;padding:0}.course-sheet li{display:grid;grid-template-columns:44px 1fr;gap:12px;border-bottom:1px solid #cfc5b2;padding:13px 0}.course-sheet li i{grid-row:1/3;font-style:normal;color:var(--blue);font-weight:900}.course-sheet li b{line-height:1.2}.course-sheet li small{color:var(--muted)}.stamp{position:absolute;right:18px;bottom:14px;border:2px solid var(--amber);color:#a66b00;padding:4px 9px;transform:rotate(-7deg);font-weight:900}.lesson-strip,.device-course,.receipt,.course-library,.faq{max-width:1080px;margin:0 auto 95px}.lesson-strip>header,.course-library>header,.faq>header{max-width:650px}.lesson-strip h2,.device-course h2,.receipt h2,.course-library h2,.faq h2{font:600 clamp(30px,4vw,48px)/1.18 Georgia,"Noto Serif SC",serif}.lesson-strip ol{list-style:none;padding:0;margin:35px 0 0;border-top:1px solid var(--line)}.lesson-strip li{display:grid;grid-template-columns:70px 1fr;padding:24px 0;border-bottom:1px solid var(--line)}.lesson-strip li>span{color:var(--blue);font-weight:900}.lesson-strip h3{font-size:22px}.lesson-strip p{color:var(--muted);max-width:760px}.device-course{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}.device-course dl{margin:0;background:var(--blue2);color:white;padding:28px}.device-course dl div{padding:20px;border-bottom:1px solid rgba(255,255,255,.25)}.device-course dl div:last-child{border:0}.device-course dt{font-weight:900;font-size:18px}.device-course dd{margin:4px 0 0;color:#dce5ff}.receipt{background:var(--white);border:1px solid var(--line);padding:48px}.receipt-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin:25px 0}.receipt-grid p{margin:0;padding:20px;border-right:1px solid var(--line)}.receipt-grid p:last-child{border:0}.receipt-grid b,.receipt-grid span{display:block}.receipt-grid span{font-size:13px;color:var(--muted)}.course-library>div,.library-page>div{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px}.lesson-card{background:var(--white);border-top:5px solid var(--blue);padding:30px}.lesson-card>span{font-size:11px;color:var(--blue);font-weight:900;letter-spacing:.14em}.lesson-card h3,.lesson-card h2{font:600 26px/1.3 Georgia,"Noto Serif SC",serif}.lesson-card h3 a,.lesson-card h2 a{text-decoration:none}.lesson-card p{color:var(--muted)}.faq{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.faq details{border-top:1px solid var(--line);padding:18px 0}.faq summary{font-weight:900;cursor:pointer}.faq details p{color:var(--muted)}footer{background:var(--ink);color:white;padding:45px max(24px,calc((100% - 1080px)/2));display:grid;grid-template-columns:1fr auto;gap:10px 40px}footer p{color:#bac3d7;margin:.2rem 0}footer a{align-self:center}footer small{grid-column:1/-1;color:#8f9ab2}.task-page,.reading-stage,.library-page,.about-page,.missing{max-width:960px;margin:45px auto 100px;padding:0 24px}.crumb{font-size:13px;color:var(--muted);display:flex;gap:10px;margin-bottom:50px}.task-page>header,.library-page>header,.course-article>header{max-width:760px}.task-page h1,.library-page h1,.about-page h1,.missing h1,.course-article h1{font:600 clamp(38px,6vw,64px)/1.15 Georgia,"Noto Serif SC",serif}.task-page>header>p:last-child,.library-page>header>p:last-child,.course-article>header>p{color:var(--muted);font-size:18px}.task-list{list-style:none;padding:0;margin:50px 0}.task-list li{display:grid;grid-template-columns:70px 1fr;border-top:1px solid var(--line);padding:28px 0}.task-list li>span{color:var(--blue);font-weight:900}.task-page aside,.course-article aside{background:#fff2d6;border-left:5px solid var(--amber);padding:20px 24px;margin:35px 0}.course-article{background:var(--white);padding:55px 70px;box-shadow:var(--shadow)}.course-article time,.lesson-card time{font-size:12px;color:var(--muted)}.course-article-body{margin-top:45px}.course-article-body section{margin:0 0 45px}.course-article-body h2{font:600 30px/1.25 Georgia,"Noto Serif SC",serif}.course-article-body p{font-size:17px;color:#34405a}.about-page{background:var(--white);padding:60px;box-shadow:var(--shadow)}.about-page h2{margin-top:38px}.missing{text-align:center;padding-top:100px}.missing p{color:var(--muted)}@media(max-width:760px){.site-head{height:68px}.site-head button{display:block;border:1px solid var(--line);background:transparent;padding:8px 11px}.site-head nav{display:none;position:absolute;z-index:5;top:68px;left:16px;right:16px;background:var(--white);padding:18px;box-shadow:var(--shadow);flex-direction:column;gap:12px}.site-head.open nav{display:flex}.hero{margin:10px 14px 65px;padding:35px 25px;grid-template-columns:1fr;gap:35px}.hero h1{font-size:43px}.actions{flex-direction:column}.actions a{text-align:center}.course-sheet{transform:none}.lesson-strip,.device-course,.receipt,.course-library,.faq{margin:0 18px 70px}.device-course,.faq{grid-template-columns:1fr;gap:25px}.receipt{padding:28px 20px}.receipt-grid{grid-template-columns:1fr 1fr}.receipt-grid p:nth-child(2){border-right:0}.receipt-grid p{border-bottom:1px solid var(--line)}.course-library>div,.library-page>div{grid-template-columns:1fr}.course-article{padding:32px 22px}.about-page{margin:25px 14px 80px;padding:35px 24px}footer{grid-template-columns:1fr}.lesson-strip li,.task-list li{grid-template-columns:50px 1fr}}