:root{color-scheme:light;--paper:#fcfbfd;--ink:#17131c;--muted:#66616c;--line:#dfdce3;--purple:#6b238e;--soft:#f1ebf5;--lime:#d4f344;--radius:12px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--purple);outline-offset:5px}button:disabled{cursor:default;opacity:.5}h1,h2,h3,p{margin:0}p{line-height:1.8}img{max-width:100%;height:auto}.wrap{max-width:1200px;margin:auto;padding:0 32px}.skip{position:absolute;left:16px;top:-80px;padding:12px;background:white;z-index:20}.skip:focus{top:10px}.topbar{border-bottom:1px solid var(--line);background:var(--paper)}.topbar-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px}.brand img{width:42px;height:42px}.brand strong{display:block;font-size:16px}.brand small{display:block;color:var(--muted);font-size:11px;letter-spacing:1px;margin-top:5px}.back{font-size:14px;min-height:44px;display:flex;align-items:center;gap:12px}.back span{color:var(--muted)}.hero{padding:72px 0 52px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:28px}.eyebrow{font-size:12px;font-weight:650;letter-spacing:2px;color:var(--purple);margin-bottom:24px}.hero h1{font-family:"Songti SC","STSong",serif;font-size:clamp(40px,4.8vw,64px);line-height:1.2;font-weight:750;letter-spacing:-3px}.hero h1 em{font-style:normal;color:var(--purple)}.hero-description{max-width:440px;font-size:16px;color:var(--muted);margin:24px 0}.primary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;gap:32px;border:0;border-radius:8px;background:var(--ink);color:#fff;padding:12px 22px;font-weight:600}.hero-meta{font-size:12px;color:var(--muted);margin-top:18px}.key-stage{position:relative;min-height:340px;border-radius:28px;background:#efedf1;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center}.stage-top{font-size:12px;color:var(--muted);position:absolute;top:24px;left:28px}.hero-combo{display:flex;align-items:center;justify-content:center;gap:4px;width:100%;padding:10px 24px}.hero-combo img{width:46%;max-width:215px;transform:rotate(-8deg)}.hero-combo .plus{font-size:32px;font-weight:300;color:#857e8b}.hero-space{display:flex;align-items:center;justify-content:center;width:38%;height:90px;font-size:25px;font-weight:650;background:linear-gradient(#fff,#f4f2f6);border:1px solid #d6d0db;border-bottom:7px solid #d1cad8;border-radius:13px;transform:rotate(-8deg);margin-left:12px}.stage-caption{text-align:center;font-size:14px;color:#585160}.stage-caption b{color:var(--ink);font-size:19px;display:block;margin-bottom:5px}.intro-band{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:64px}.intro-step{padding:24px 22px 24px 0;display:flex;gap:15px}.intro-step+.intro-step{border-left:1px solid var(--line);padding-left:24px}.step-no{color:var(--purple);font-size:12px;padding-top:5px;font-weight:650}.intro-step h2{font-size:17px;margin-bottom:6px}.intro-step p{font-size:13px;color:var(--muted)}.section-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-top h2{font-size:30px;letter-spacing:-1px}.section-top .eyebrow{margin-bottom:12px}.section-top p{font-size:14px;color:var(--muted);max-width:480px}.find-head{padding-bottom:24px}.level-tabs{display:flex;gap:8px;flex-wrap:wrap}.level-tabs button{border:1px solid var(--line);background:transparent;min-height:44px;padding:10px 18px;border-radius:8px;font-size:14px}.level-tabs button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:#fff}.level-tabs button b{font-size:12px;font-weight:500;margin-left:6px;opacity:.7}.filter-bar{display:flex;flex-wrap:wrap;gap:4px 8px;margin:18px 0 8px}.filter-bar button{border:0;background:transparent;min-height:44px;padding:8px 13px;border-radius:8px;color:var(--muted);font-size:14px}.filter-bar button[aria-pressed=true]{background:var(--soft);color:var(--purple);font-weight:650}.result-line{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px;margin-top:14px}.text-btn{background:transparent;border:0;color:var(--purple);min-height:44px;padding:8px 0;font-size:13px}.atlas-layout{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(0,1fr);gap:36px;align-items:start}.shortcut-list{border-top:1px solid var(--line)}.shortcut-row{border-bottom:1px solid var(--line);scroll-margin-top:100px}.shortcut-row[hidden]{display:none}.shortcut-row summary{list-style:none;display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px;min-height:90px;padding:16px 8px;cursor:pointer}.shortcut-row summary::-webkit-details-marker{display:none}.row-name{font-size:16px;font-weight:600;display:block;line-height:1.5}.row-meta{font-size:11px;color:var(--muted);display:block;margin-top:5px}.row-meta .novice-mark{color:var(--purple);margin-right:7px}.key-combo{display:flex;gap:5px;align-items:center;justify-content:flex-end;flex-wrap:wrap}kbd{font-family:inherit;white-space:nowrap;font-size:13px;font-weight:600;min-height:30px;min-width:30px;padding:6px 8px;display:inline-flex;justify-content:center;align-items:center;background:white;border:1px solid #d9d4de;border-bottom:3px solid #d3ccd9;border-radius:6px;line-height:1}.key-combo i{font-size:12px;font-style:normal;color:var(--muted)}kbd.caps{background:#e2f799;border-color:#bfda65}.shortcut-row[open]{background:var(--soft);border-left:3px solid var(--purple)}.shortcut-row[open] summary{padding-left:16px}.row-detail{padding:0 18px 22px;font-size:14px}.row-detail p{margin:8px 0;color:#494250}.row-detail strong{color:var(--ink)}.row-detail a{display:inline-block;font-size:12px;color:var(--purple);padding:12px 0}.row-detail .condition{font-size:12px;color:var(--muted)}.detail-label{color:var(--purple);font-size:11px;letter-spacing:1px}.keyboard-aside{position:sticky;top:24px}.keyboard-card{background:#f0edf3;border:1px solid #e5dfea;border-radius:16px;padding:24px;overflow:hidden}.keyboard-caption{display:flex;align-items:center;justify-content:space-between;gap:12px}.keyboard-caption h3{font-size:15px}.keyboard-caption span{font-size:11px;color:var(--muted)}.keyboard-tabs{display:flex;gap:6px;margin:18px 0}.keyboard-tabs button{font-size:12px;min-height:36px;padding:8px 12px;border:1px solid #d8d1df;border-radius:6px;background:transparent}.keyboard-tabs button[aria-pressed=true]{background:#fff;border-color:var(--purple);color:var(--purple)}.keyboard{display:flex;flex-direction:column;gap:5px;width:100%;padding:4px 0}.key-row{display:flex;gap:4px}.key-row:nth-child(2){padding-left:10px}.key-row:nth-child(3){padding-left:18px}.key-row:nth-child(4){padding-left:28px}.key-row button{flex:1;min-width:0;height:37px;border:1px solid #d3ccd9;border-bottom:3px solid #bfb5c8;border-radius:5px;background:#fff;color:#4b4354;font-size:11px;padding:0;position:relative}.key-row button.available:after{content:"";position:absolute;bottom:4px;width:3px;height:3px;border-radius:50%;left:calc(50% - 1px);background:var(--purple)}.key-row button.active{background:var(--purple);color:white;border-color:#55216e}.key-row button.caps-key{flex:1.5;background:var(--lime);border-color:#a3bd31;color:#26320b;font-size:10px}.key-row button.space-key{flex:4}.key-row button:focus-visible{outline-offset:1px;z-index:1}.key-row button:disabled{opacity:.4}.keyboard-help{font-size:11px;color:var(--muted);margin-top:13px;line-height:1.6}.selected-detail{margin-top:24px;padding-top:22px;border-top:1px solid #d8d1df;min-height:224px}.selected-detail .key-combo{justify-content:flex-start;margin:12px 0}.selected-detail .key-combo kbd{font-size:20px;min-height:42px;min-width:42px}.selected-detail h3{font-size:23px;letter-spacing:-.4px;margin:14px 0 7px}.selected-detail p{font-size:13px;color:#585160}.memory-tip{margin-top:18px!important;color:var(--purple)!important}.aside-note{font-size:12px;color:var(--muted);padding:18px 4px}.aside-note a{text-decoration:underline}.bottom-course{margin:72px 0 0;border-top:1px solid var(--line);padding-top:48px}.basics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:22px 0 32px;border-bottom:1px solid var(--line)}.basics h3{font-size:15px;margin:14px 0 8px}.basics p{color:var(--muted);font-size:13px}.practice{margin:48px 0;display:flex;justify-content:space-between;align-items:center;gap:24px;padding:32px;background:#f0edf3;border-radius:16px}.practice h2{font-size:24px}.practice p{margin-top:10px;color:var(--muted);font-size:14px}.faq{margin-top:40px}.faq>details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;font-size:15px;min-height:32px;line-height:1.8}.faq details p{font-size:14px;color:var(--muted);max-width:760px;padding-top:12px}.footer{border-top:1px solid var(--line);margin-top:64px;padding:28px 0}.footer-inner{display:flex;justify-content:space-between;gap:24px;font-size:12px;color:var(--muted)}.footer-links{display:flex;gap:24px;align-items:center}.footer a{min-height:44px;display:inline-flex;align-items:center}.footer b{display:block;color:var(--ink);font-size:14px;margin-bottom:7px}dialog{border:1px solid var(--line);border-radius:16px;padding:32px;width:min(520px,calc(100vw - 32px));max-height:90vh;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#17131c90}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;font-size:13px;color:var(--muted)}.quiz-header button{width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:transparent;font-size:20px}#quiz-title{font-size:27px;line-height:1.4}#quiz-scenario{font-size:14px;color:var(--muted);margin:12px 0 24px}.quiz-options{display:grid;gap:12px}.quiz-options button{min-height:58px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:12px;text-align:left}.quiz-options .key-combo{justify-content:center}.quiz-options button.correct{background:#eef7d9;border-color:#678823}.quiz-options button.wrong{background:#fbe9e9;border-color:#b65d5d}#quiz-feedback{min-height:60px;font-size:14px;margin:16px 0;line-height:1.7}#quiz-next{width:100%}.js-only{display:none}.js .js-only{display:block}.js .js-only.level-tabs,.js .js-only.filter-bar,.js .js-only.keyboard-tabs{display:flex}.js .js-only.practice{display:flex}.js .shortcut-row summary:hover{background:#f4f0f7}.js .keyboard-aside{display:block}.nojs-notice{padding:14px;background:var(--soft);border-radius:8px;font-size:14px;margin-bottom:18px}[hidden]{display:none!important}@media(min-width:1500px){.hero{padding-top:84px;padding-bottom:64px}}@media(max-width:1023px){.atlas-layout{gap:24px;grid-template-columns:1.15fr 1fr}.keyboard-card{padding:18px}.hero h1{font-size:48px}.hero-combo{padding:10px 12px}.key-row button{height:33px}.wrap{padding:0 24px}.hero-space{height:76px;font-size:20px}}@media(max-width:760px){.hero{grid-template-columns:1fr;padding-top:40px;gap:28px}.hero h1{font-size:46px;letter-spacing:-2px}.hero-description{font-size:15px;margin:20px 0}.key-stage{min-height:285px}.hero-combo{max-width:430px}.intro-band{margin-bottom:40px;grid-template-columns:1fr}.intro-step{padding:18px 0}.intro-step+.intro-step{border-left:0;border-top:1px solid var(--line);padding:18px 0}.intro-step p{font-size:13px}.section-top{align-items:flex-start;flex-direction:column;gap:12px}.section-top h2{font-size:27px}.atlas-layout{display:flex;flex-direction:column;gap:24px}.keyboard-aside{position:static;order:-1;width:100%}.keyboard-card{padding:20px}.keyboard{max-width:450px;margin:auto}.selected-detail{min-height:0;margin-top:16px;padding-top:16px}.selected-detail h3{font-size:21px}.selected-detail .key-combo{float:right;margin:0 0 10px 12px;max-width:55%}.selected-detail .key-combo kbd{font-size:15px;min-width:34px;min-height:34px}.keyboard-help{font-size:11px}.aside-note{display:none}.shortcut-list{width:100%}.topbar-inner{min-height:74px}.brand strong{font-size:14px}.brand img{width:36px;height:36px}.brand small{font-size:10px;letter-spacing:0}.back{font-size:12px}.back span{display:none}.wrap{padding:0 20px}.basics{grid-template-columns:1fr 1fr;gap:28px 20px}.practice{padding:24px;align-items:flex-start;flex-direction:column}.practice .primary{width:100%}.footer-inner{flex-direction:column;gap:12px}.footer-links{gap:20px}.result-line{align-items:flex-start}.row-name{font-size:14px}.shortcut-row summary{gap:10px;padding-left:2px}.key-combo{gap:3px}kbd{padding:6px;font-size:12px;min-width:26px}.filter-bar{gap:2px}.filter-bar button{padding:8px 10px}.level-tabs button{padding:10px 12px}.key-row button{height:36px}.bottom-course{margin-top:48px}.hero-meta{font-size:11px}}@media(max-width:360px){.brand strong{font-size:12px}.hero h1{font-size:40px}.key-stage{min-height:260px}.key-row{gap:3px}.key-row button{font-size:10px}.keyboard-card{padding:14px}.shortcut-row summary{grid-template-columns:1fr}.key-combo{justify-content:flex-start}.level-tabs button{font-size:12px}.keyboard-caption span{font-size:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}@media print{.topbar,.hero,.intro-band,.js-only,.keyboard-aside,.practice,.footer,.bottom-course{display:none!important}.atlas-layout{display:block}.shortcut-row{break-inside:avoid}.shortcut-row[hidden]{display:block!important}.shortcut-row summary{min-height:60px}.shortcut-row .row-detail{display:block}.wrap{padding:0}.find-head{padding:0}.section-top{margin:0}body{background:white}a{text-decoration:none}}

.keyboard-viewport{overflow-x:auto;overscroll-behavior-x:contain;padding:5px;margin:-5px}.keyboard{min-width:350px}.key-row button{min-width:24px}

#basics{margin-top:0;padding-top:0;border-top:0}.basics{grid-template-columns:repeat(5,minmax(0,1fr))}.intro-step:focus-visible{outline-offset:-4px}.intro-step:hover h2{color:var(--purple)}.native-course{margin:52px 0 64px}.copy-flow{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#f3eff6}.copy-step{padding:28px}.copy-step+.copy-step{border-left:1px solid var(--line)}.copy-step>div{display:flex;gap:12px;align-items:center}.copy-step h3{font-size:18px}.copy-step .key-combo{justify-content:flex-start;margin:22px 0 16px}.copy-step kbd{font-size:26px;min-height:48px;min-width:48px;padding:10px 16px}.copy-step p{font-size:14px;color:#524959;max-width:360px}.copy-reminder{font-size:13px;color:var(--muted);margin:16px 0 32px}.copy-reminder strong{color:var(--ink)}.native-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}.native-group>h3{font-size:18px;border-bottom:2px solid var(--ink);padding-bottom:14px}.native-row{padding:20px 0;border-bottom:1px solid var(--line)}.native-row-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.native-row h4{font-size:14px;line-height:1.6;margin:0}.native-row p{font-size:13px;color:var(--muted);margin-top:10px}.native-source{font-size:12px;color:var(--muted);margin-top:22px}.native-source a{color:var(--purple);text-decoration:underline;text-underline-offset:3px;margin-left:8px}.shortcut-group>h3{font-size:18px;padding:22px 8px 18px;border-bottom:1px solid var(--line)}.shortcut-group>h3 small{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-top:8px;line-height:1.7}.shortcut-group+.shortcut-group{margin-top:24px}.filter-bar button{border:1px solid transparent}.filter-bar button[aria-pressed=true]{border-color:#dcc9e6}.find-head .section-top{margin-bottom:24px}
@media(max-width:1023px){.basics{grid-template-columns:repeat(3,minmax(0,1fr))}.native-groups{gap:24px}.native-row-head{align-items:flex-start;flex-direction:column}.native-row .key-combo{justify-content:flex-start}}@media(max-width:760px){.basics{grid-template-columns:1fr 1fr}.native-course{margin:40px 0 48px}.copy-flow{grid-template-columns:1fr}.copy-step{padding:24px}.copy-step+.copy-step{border-left:0;border-top:1px solid var(--line)}.native-groups{grid-template-columns:1fr;gap:32px}.native-row-head{align-items:center;flex-direction:row}.copy-step .key-combo{margin:16px 0}.copy-step kbd{font-size:23px}.native-row{padding:18px 0}.native-source a{display:inline-block;margin-left:0}.shortcut-group>h3{padding-top:20px}.filter-bar button{min-height:44px}.result-line{flex-wrap:wrap}}@media print{#basics,.native-course{display:block!important}.native-groups{display:block}.native-row,.copy-step{break-inside:avoid}.shortcut-group[hidden]{display:block!important}.shortcut-group>h3{break-after:avoid}}