:root{color-scheme:light;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:#202424;background:#fff;font-size:15px;line-height:1.65;letter-spacing:0}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:22px}body{margin:0}a{color:#086f69;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,summary:focus-visible{outline:3px solid #088b85;outline-offset:4px}button,a,summary{-webkit-tap-highlight-color:transparent}
.site-header{border-bottom:1px solid #e0e6e5}.header-inner{max-width:1080px;margin:auto;padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;color:#182b29;font-size:23px;font-weight:700;line-height:1.15}.brand:hover{text-decoration:none}.brand img{border-radius:6px;flex:none}.brand-caption{display:block;font-size:10px;font-weight:500;color:#647571;margin-top:5px;letter-spacing:0}.header-inner nav{display:flex;gap:26px;align-items:center}.header-inner nav a{font-size:14px;color:#455550}
.content{max-width:1080px;margin:auto;padding:0 28px 64px}.intro{padding:48px 0 0}.eyebrow{display:flex;align-items:center;gap:10px;color:#5c6b67;margin:0 0 12px;font-size:13px}.tag{font-size:11px;padding:1px 7px;border:1px solid #c9d9d6;border-radius:4px;background:#eff7f5;color:#176650}h1{font-size:32px;line-height:1.35;margin:0 0 14px;font-weight:700}h2{font-size:21px;margin:0;line-height:1.4}h3{font-size:20px;line-height:1.45;margin:0 0 12px}.lead{margin:0 0 26px;color:#62716c;font-size:16px}.release-notice{background:#fff9e9;border-left:3px solid #c39223;color:#6c561e;padding:15px 18px;font-size:13px}.release-notice strong{font-weight:600}
.section{padding-top:36px}.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}.section-title>span{font-size:12px;color:#6c7873}.downloads{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}.download-item{border:1px solid #dce5e1;border-radius:6px;padding:26px;min-width:0}.download-item.student{border-top:3px solid #158572}.download-item.teacher{border-top:3px solid #83813d}.item-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.audience{font-size:12px;color:#4c6058;font-weight:600}.version{font-size:12px;color:#66776e;font-variant-numeric:tabular-nums}.download-item>p:not(.file-meta){color:#5c6c64;font-size:14px;margin:0 0 23px;min-height:70px}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;border-radius:5px;padding:10px 19px;font-size:14px;font-weight:600;border:1px solid transparent;max-width:100%;text-align:center}.button:hover{text-decoration:none}.primary{background:#08796d;color:white}.primary:hover{background:#066457}.secondary{border-color:#b8c8c1;color:#314e42;background:#fff}.secondary:hover{background:#f2f6f4}.button svg{flex:none}.file-meta{color:#75827c;font-size:12px;margin:11px 0 19px;min-height:20px}.text-link{font-size:13px;display:inline-flex;gap:9px;align-items:center}.checksum{border-top:1px solid #e8eeea;padding-top:14px;margin-top:20px}.checksum summary{font-size:12px;color:#6d7c74;cursor:pointer}.checksum code{display:block;font-family:ui-monospace,Consolas,monospace;font-size:11px;overflow-wrap:anywhere;margin-top:9px;line-height:1.6}.note{font-size:12px;color:#6a7871;line-height:1.8;margin:16px 0 0}.manifest-status{color:#9b541c;font-size:12px;margin:8px 0 0;min-height:0}
.tutorial-row{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 0;border-top:1px solid #e0e7e3}.tutorial-row:last-child{border-bottom:1px solid #e0e7e3}.tutorial-row h3{font-size:16px;margin:0 0 5px}.tutorial-row p{font-size:13px;color:#708077;margin:0}.row-actions{display:flex;gap:22px;white-space:nowrap;flex:none;font-size:13px}.faq h2{margin-bottom:18px}.faq details{border-top:1px solid #e5ebe7;padding:15px 0}.faq summary{cursor:pointer;font-size:14px;color:#344b40}.faq details p{font-size:13px;line-height:1.9;color:#65766b;margin:12px 0 3px;max-width:820px}.site-footer{border-top:1px solid #e4eae6;background:#f7f9f7;font-size:11px;color:#758078}.site-footer>div{max-width:1080px;margin:auto;padding:22px 28px;display:flex;justify-content:space-between;gap:14px}
.guide .intro{padding-top:36px}.guide .section{padding-top:27px}.guide h2{margin-bottom:16px}.guide h3{font-size:17px;margin-top:22px}.guide p,.guide li{color:#4f6357;font-size:14px}.guide ol,.guide ul{padding-left:24px}.guide li{padding-left:4px;margin-bottom:10px}.guide .guide-links{display:flex;gap:20px;margin-top:20px;flex-wrap:wrap}.guide .callout{padding:16px 20px;background:#f1f7f3;border-left:3px solid #2f8f66}.guide code{font-size:12px;overflow-wrap:anywhere}.guide .content{max-width:900px}
@media(max-width:640px){.header-inner{padding:16px 18px;align-items:flex-start;gap:16px}.brand{font-size:20px;gap:9px}.brand img{width:36px;height:36px}.header-inner nav{gap:14px;flex-wrap:wrap;justify-content:flex-end;padding-top:5px}.header-inner nav a{font-size:12px}.content{padding:0 18px 40px}.intro{padding-top:30px}h1{font-size:28px}.lead{font-size:14px;margin-bottom:22px}.section{padding-top:28px}.section-title{display:block}.section-title>span{display:block;margin-top:7px}.downloads{grid-template-columns:minmax(0,1fr);gap:16px}.download-item{padding:22px}.download-item>p:not(.file-meta){min-height:0;margin-bottom:20px}.tutorial-row{align-items:flex-start;flex-direction:column;gap:14px;padding:19px 0}.row-actions{gap:24px}.site-footer>div{padding:20px 18px;flex-direction:column;gap:6px}.release-notice{padding:13px 15px}.guide .intro{padding-top:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header nav,.guide-links,.site-footer{display:none!important}.site-header{border:0}.content{padding:0 10px 10px!important;max-width:none!important}.intro{padding-top:8px!important}.section{padding-top:16px!important}.guide h2{break-after:avoid}.guide li{break-inside:avoid}a{color:inherit;text-decoration:none}body{font-size:12px}.release-notice,.callout{-webkit-print-color-adjust:exact;print-color-adjust:exact}}