:root{--paper:#f7f5ee;--ink:#213c32;--orange:#b94e32;--muted:#5f685b;--line:#dcded2}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{background:var(--paper);color:var(--ink);margin:0;font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}button,summary{cursor:pointer}header,main,footer{max-width:1280px;margin:auto}header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:25px 40px;display:flex}.brand{align-items:center;gap:12px;font-size:25px;font-weight:800;display:flex}.brand-mark{background:var(--orange);color:var(--paper);text-align:center;border-radius:9px;width:33px;height:35px;font:italic 33px Georgia}header nav{align-items:center;gap:35px;font-size:14px;display:flex}.nav-button{border:1px solid var(--ink);border-radius:6px;padding:9px 18px}.hero{grid-template-columns:1.15fr 1fr;gap:70px;padding:75px 40px 65px;display:grid}.eyebrow{letter-spacing:2px;color:var(--orange);margin:0 0 22px;font-size:11px;font-weight:750}h1{letter-spacing:-2px;margin:0 0 25px;font-size:clamp(38px,5vw,65px);font-weight:800;line-height:1.25}h1 span{color:var(--orange)}.lead{color:#667065;font-size:17px;line-height:1.95}.button{background:var(--ink);color:#fff;border-radius:6px;gap:40px;margin-top:18px;padding:14px 22px;font-size:14px;display:inline-flex}.button:hover{background:var(--orange)}.hero-note{color:var(--muted);margin-top:20px;font-size:11px}.hero-art{text-align:center;background:#eee8d8;border-radius:120px 120px 12px 12px;min-height:410px;padding:28px;position:relative;overflow:hidden}.art-label{letter-spacing:2px;font-size:9px}.sun{background:#e7b450;border-radius:50%;width:100px;height:100px;position:absolute;top:65px;right:30px}.arch{background:#c46648;border-radius:100px 100px 0 0;width:180px;height:260px;margin:30px auto 0;position:relative;box-shadow:20px 14px #d6ad91}.arch span{color:#fbedd2;font:italic 220px/1.15 Georgia}.word-card{background:#fffdf4;padding:16px 22px;font:italic 24px Georgia;position:absolute;top:205px;left:12px;transform:rotate(-9deg);box-shadow:0 5px 22px #213c3214}.word-card small{margin-top:8px;font:11px system-ui;display:block}.art-bottom{text-align:right;font-size:11px;position:absolute;bottom:20px;right:25px}.art-bottom b{font:italic 20px Georgia}.strip{border-block:1px solid var(--line);color:var(--muted);justify-content:space-around;padding:19px 30px;font-size:12px;display:flex}.strip span:before{content:"✦";color:var(--orange);margin-right:12px}.path{grid-template-columns:1.1fr 1fr 1fr;gap:25px;padding:65px 40px;display:grid}h2{letter-spacing:-.7px;margin:0 0 20px;font-size:27px;line-height:1.5}.path .eyebrow{margin-bottom:12px}.path>a{background:#eceee4;border-radius:9px;padding:25px}.path>a:last-child{background:#f0e5d8}.path small{color:var(--muted);font-size:11px}h3{margin:12px 0;font-size:19px}.path p{color:var(--muted);font-size:13px}.library{border-top:1px solid var(--line);grid-template-columns:250px 1fr;gap:65px;padding:40px;display:grid}aside>p{color:var(--muted);font-size:13px}.filters{gap:6px;margin-top:30px;display:grid}.filters button{text-align:left;color:var(--muted);background:0 0;border:0;border-radius:5px;justify-content:space-between;padding:13px 15px;font-size:13px;display:flex}.filters button.active{background:var(--ink);color:#fff}.aside-note{color:var(--muted);border-left:2px solid #d8ad72;margin-top:50px;padding-left:18px;font-size:12px}.aside-note strong{color:var(--ink);margin-top:10px;font-size:17px;display:block}.search{border:1px solid var(--line);background:#fffdf7;border-radius:7px;align-items:center;gap:15px;padding:12px 18px;display:flex}.search>span{font-size:25px}.search input{width:100%;color:var(--ink);background:0 0;border:0;outline:none;font-size:13px}kbd{border:1px solid var(--line);color:var(--muted);padding:0 7px}.count{color:var(--muted);margin:20px 0;font-size:11px}.lesson{border-bottom:1px solid var(--line);grid-template-columns:30px 1fr 25px;gap:15px;padding:25px 0;transition:padding .2s;display:grid}.lesson:hover{padding-left:12px}.lesson[hidden]{display:none}.lesson-number{color:#5f685b;font:italic 18px Georgia}.tags{color:var(--orange);font-size:10px;font-weight:700}.tags span{color:var(--muted);margin-left:12px;font-weight:400}.lesson h3{margin:7px 0}.lesson p{color:var(--muted);margin:6px 0;font-size:13px}.lesson small{color:#5f685b;font:italic 13px Georgia}.arrow{align-self:center;font-size:24px}.daily{background:var(--ink);color:#f7f5ee;border-radius:10px;grid-template-columns:1fr 1fr;gap:40px;margin:50px 40px 70px;padding:40px 45px;display:grid}.daily .eyebrow{color:#efb58b}.daily p{font-size:13px}.quiz-sentence{font:27px Georgia!important}.quiz-options{gap:12px;display:flex}.quiz-options button{color:#fff;background:0 0;border:1px solid #8b9a8c;border-radius:5px;padding:8px 35px}.quiz-options button:hover{background:#466453}#feedback{color:#c6d2c4;font-size:12px}footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;padding:35px 40px;display:flex}footer .brand span{color:var(--muted);font-size:12px;font-weight:400}footer p,footer small{color:var(--muted);font-size:11px}.skip{position:absolute;top:-100px}.skip:focus{z-index:10;background:#fff;top:0}.article-wrap{max-width:850px;padding:35px 24px 80px}.breadcrumbs{color:var(--muted);margin-bottom:50px;font-size:12px}.article-wrap h1{font-size:42px}.es-title{color:var(--orange);font:italic 24px Georgia}article>h2{margin-top:45px;font-size:24px}article>p{line-height:2}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:17px 13px}th{background:#e9ecdf}td[lang]{font-family:Georgia,serif}.warning{background:#f2e7d6;border-radius:8px;margin-top:40px;padding:25px}.warning h2{font-size:20px}.warning p{color:var(--ink);font-size:15px}.toc{border-block:1px solid var(--line);flex-wrap:wrap;gap:20px;margin:30px 0;padding:15px 0;font-size:13px;display:flex}.practice{font:24px Georgia}details{background:#e9ecdf;border-radius:6px;padding:20px}summary{font-size:14px}.source{color:var(--muted);margin-top:35px;font-size:12px}.source a{text-decoration:underline}.next{background:var(--ink);color:#fff;border-radius:8px;margin-top:40px;padding:25px;display:block}.next small{color:#c6d2c4;font-size:11px}@media (width<=760px){header{padding:18px 20px}.brand{font-size:22px}header nav{gap:15px;font-size:12px}header nav>a:nth-child(2){display:none}.nav-button{padding:7px 10px}.hero{grid-template-columns:1fr;gap:30px;padding:45px 22px 30px}.hero-art{justify-self:center;width:100%;max-width:450px;min-height:340px}.arch{width:160px;height:220px}.arch span{font-size:180px}.word-card{top:175px}.hero h1{font-size:47px}.lead{font-size:15px}.strip{flex-wrap:wrap;gap:12px;padding:16px;font-size:10px}.path{grid-template-columns:1fr 1fr;gap:12px;padding:40px 22px}.path>div{grid-column:1/-1}.path>a{padding:18px}.path h3{font-size:16px}.path p{font-size:12px}.library{grid-template-columns:1fr;gap:20px;padding:35px 22px}.filters{gap:4px;margin-top:20px;display:flex}.filters button{gap:10px;padding:10px;font-size:12px}.aside-note{display:none}.lesson{grid-template-columns:23px 1fr 20px;gap:10px}.lesson h3{font-size:18px}.daily{grid-template-columns:1fr;gap:10px;margin:25px 22px 40px;padding:28px}footer{flex-wrap:wrap;gap:15px;padding:25px 22px}footer p{display:none}.article-wrap h1{font-size:33px}.breadcrumbs{margin-bottom:30px}th,td{padding:12px 7px;font-size:13px}h2{font-size:25px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media (width<=480px){header .nav-button{display:none}header nav{gap:16px}}header{z-index:40;background:var(--paper);gap:20px;max-width:none;min-height:73px;padding:18px max(24px,50vw - 696px);position:sticky;top:0}.learning-shell{grid-template-columns:264px minmax(0,1fr);align-items:start;max-width:1440px;margin:auto;display:grid}.learning-content{min-width:0}.learning-content .article-wrap{max-width:980px;padding:40px clamp(24px,4vw,70px) 80px}.learning-content .catalog{padding:40px clamp(24px,4vw,60px)}.learning-content .article-wrap h1{letter-spacing:-1.2px;font-size:clamp(30px,3.2vw,44px)}.learning-content .breadcrumbs{margin-bottom:30px}.learning-content article>p{font-size:16px;line-height:2}.learning-content article>.lead{color:var(--ink);border-left:3px solid var(--orange);background:#eeeee5;border-radius:0 6px 6px 0;padding:12px 20px;font-size:17px}.learning-content .toc{gap:7px 18px;font-size:12px}.learning-content article>h2{scroll-margin-top:110px}.learning-content .module{border:0;border-bottom:1px solid var(--line);background:0 0;border-radius:0;padding:24px 0}.learning-content .modules{gap:10px 32px}.learning-content .module h2{font-size:21px}footer .footer-links{font-size:12px;display:block}footer .footer-links a{text-underline-offset:4px;text-decoration:underline}.study-sidebar summary:focus-visible{outline-offset:-3px}@media (width<=1000px){.learning-shell{display:block}.learning-content .article-wrap{max-width:850px;padding:30px 24px 65px}.learning-content .catalog{padding:30px 24px}.learning-content article>h2{scroll-margin-top:145px}.learning-content .module-nav{display:none}.learning-content .toc{gap:8px 16px}.learning-content .article-wrap h1{font-size:32px}.learning-content .breadcrumbs{margin-bottom:25px;font-size:11px}.learning-content .article-wrap .lead{font-size:15px}.learning-content .modules{grid-template-columns:1fr}}@media (width<=480px){header{height:73px;padding:16px 22px}.hero h1{font-size:40px}.filters{flex-wrap:wrap}.learning-content .article-wrap{padding-inline:22px}.learning-content .article-wrap h1{font-size:29px}.learning-content article>p{font-size:15px}footer{align-items:flex-start}footer .footer-links{width:100%;margin:0}.learning-content .prerequisite{line-height:1.9!important}.learning-content .toc a{padding:7px 0}}:root{--header-height:81px}header{height:var(--header-height);min-height:var(--header-height)}.learning-content article [id]{scroll-margin-top:calc(var(--header-height) + 30px)}@media (width<=1000px){:root{--header-height:73px}header{padding-block:14px}.learning-content article [id]{scroll-margin-top:calc(var(--header-height) + 65px)}}.primary-nav .mobile-tools{display:none}.primary-nav a{white-space:nowrap}.primary-nav .desktop-tool:hover{color:var(--orange)}@media (width<=760px){header .primary-nav{gap:18px}header .primary-nav>.desktop-tool{display:none}header .primary-nav .mobile-tools{background:0 0;border-radius:0;padding:0;display:block;position:relative}header .mobile-tools summary{padding:8px 0;font-size:12px;list-style:none}header .mobile-tools>div{background:var(--paper);border:1px solid var(--line);border-radius:8px;min-width:180px;padding:10px;position:absolute;top:42px;right:0;box-shadow:0 12px 25px #213c3214}header .mobile-tools a{padding:12px;font-size:13px;display:block}header .mobile-tools a:hover{background:#e9ecdf}}.conjugation-toc{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin:28px 0;display:grid}.conjugation-toc a{border:1px solid var(--line);background:#eeeee5;border-radius:6px;padding:10px 12px;font-size:12px}.conjugation-toc a:hover{border-color:var(--orange);color:var(--orange)}.conjugation-tense{margin:45px 0;scroll-margin-top:25px}.conjugation-tense h2{margin-bottom:4px}.conjugation-tense>p{color:var(--muted);margin-top:0;font-size:13px}.conjugation-tense th[scope=row]{text-align:left;background:0 0;font-weight:400}.conjugation-tense td{font-size:18px}.conjugation-collocations{border-left:3px solid var(--orange);background:#eeeee5;border-radius:0 6px 6px 0;margin:25px 0;padding:18px}.conjugation-collocations p{margin-bottom:0;font-size:14px}.sidebar-tools[data-astro-cid-lef5vpt2]{gap:6px;padding:0 10px 18px;display:flex}.sidebar-tools[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2]{border:1px solid var(--line);border-radius:4px;padding:7px 8px;font-size:11px}.sidebar-tools[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2]:hover{background:#e9ecdf}.study-sidebar[data-astro-cid-lef5vpt2]{min-width:0;top:calc(var(--header-height) + 16px);border-right:1px solid var(--line);background:var(--paper);align-self:start;position:sticky}.study-panel[data-astro-cid-lef5vpt2]{max-height:calc(100dvh - var(--header-height) - 16px);scrollbar-width:thin;overscroll-behavior:contain;padding:25px 18px 24px 12px;overflow:auto}.study-heading[data-astro-cid-lef5vpt2]{padding:0 12px 18px}.study-heading[data-astro-cid-lef5vpt2]>a[data-astro-cid-lef5vpt2]{font-size:18px;font-weight:800}.study-heading[data-astro-cid-lef5vpt2] small[data-astro-cid-lef5vpt2]{color:var(--muted);margin-top:3px;font-size:12px;display:block}.nav-search[data-astro-cid-lef5vpt2]{padding:0 10px 20px;display:block}.nav-search[data-astro-cid-lef5vpt2] input[data-astro-cid-lef5vpt2]{border:1px solid var(--line);width:100%;min-width:0;color:var(--ink);background:#fffdf7;border-radius:6px;padding:10px;font-size:13px}.nav-group[data-astro-cid-lef5vpt2],.nav-module[data-astro-cid-lef5vpt2]{background:0 0;border-radius:0;padding:0}.nav-group[data-astro-cid-lef5vpt2]>summary[data-astro-cid-lef5vpt2]{letter-spacing:1px;min-height:44px;color:var(--muted);justify-content:space-between;align-items:center;padding:14px 12px 7px;font-size:11px;font-weight:700;list-style:none;display:flex}.nav-group[data-astro-cid-lef5vpt2]>summary[data-astro-cid-lef5vpt2]:after{content:"+"}.nav-group[data-astro-cid-lef5vpt2][open]>summary[data-astro-cid-lef5vpt2]:after{content:"−"}.nav-module[data-astro-cid-lef5vpt2]>summary[data-astro-cid-lef5vpt2]{border-radius:5px;justify-content:space-between;align-items:center;padding:9px 12px;font-size:13px;list-style:none;display:flex}.nav-module[data-astro-cid-lef5vpt2]>summary[data-astro-cid-lef5vpt2]:hover{background:#eceee4}.nav-module[data-astro-cid-lef5vpt2][open]>summary[data-astro-cid-lef5vpt2]{font-weight:750}.nav-module[data-astro-cid-lef5vpt2] summary[data-astro-cid-lef5vpt2] small[data-astro-cid-lef5vpt2]{color:var(--muted);font-size:10px;font-weight:400}.module-lessons[data-astro-cid-lef5vpt2]{padding:1px 0 10px}.module-lessons[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2]{border-left:2px solid #0000;gap:9px;padding:8px 10px 8px 17px;font-size:12px;line-height:1.6;display:flex}.module-lessons[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2]:hover{background:#e9ecdf}.module-lessons[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2][aria-current=page]{border-left-color:var(--orange);color:var(--ink);background:#e7ecdf;font-weight:750}.nav-number[data-astro-cid-lef5vpt2]{color:var(--muted);font-variant-numeric:tabular-nums;padding-top:2px;font-size:10px}.module-lessons[data-astro-cid-lef5vpt2] .module-overview[data-astro-cid-lef5vpt2]{color:var(--orange);font-size:11px}.all-topics[data-astro-cid-lef5vpt2]{color:var(--orange);margin:20px 12px 0;font-size:12px;display:block}.study-toggle[data-astro-cid-lef5vpt2]{display:none}.nav-empty[data-astro-cid-lef5vpt2]{padding:10px;font-size:12px}.module-lessons[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2][hidden],details[data-astro-cid-lef5vpt2][hidden]{display:none}.sr-only[data-astro-cid-lef5vpt2]{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (width<=1000px){.study-sidebar[data-astro-cid-lef5vpt2]{top:var(--header-height);border:0;border-bottom:1px solid var(--line);z-index:30;position:sticky}.study-toggle[data-astro-cid-lef5vpt2]{background:var(--paper);width:100%;color:var(--ink);border:0;justify-content:space-between;align-items:center;gap:15px;min-height:50px;padding:14px 22px;font-size:12px;display:flex}.study-toggle[data-astro-cid-lef5vpt2]>span[data-astro-cid-lef5vpt2]:first-child{align-items:center;gap:10px;display:flex}.study-toggle[data-astro-cid-lef5vpt2] strong[data-astro-cid-lef5vpt2]{font-weight:700}.study-toggle[data-astro-cid-lef5vpt2]>span[data-astro-cid-lef5vpt2]:last-child{color:var(--muted);font-size:11px}.study-panel[data-astro-cid-lef5vpt2]{max-height:calc(100dvh - var(--header-height) - 60px);border-bottom:1px solid var(--line);padding:15px 22px 25px;box-shadow:0 12px 24px #24372a0a}.study-sidebar[data-astro-cid-lef5vpt2][data-ready=true]:not([data-open=true]) .study-panel[data-astro-cid-lef5vpt2]{display:none}.nav-module[data-astro-cid-lef5vpt2]>summary[data-astro-cid-lef5vpt2]{min-height:44px;font-size:14px}.module-lessons[data-astro-cid-lef5vpt2] a[data-astro-cid-lef5vpt2]{align-items:center;min-height:44px;font-size:13px}.study-heading[data-astro-cid-lef5vpt2]{display:none}}
