/* 数游中文阅读及导航适配；课程原有图形、颜色和互动布局保留。 */
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:17px}
html,body{text-size-adjust:100%}
header #logo{font-size:25px;font-weight:800;letter-spacing:4px;color:#fff;text-decoration:none;width:auto;padding:0 24px}
header nav .nav-link{font-size:16px;min-width:100px}
article h1{font-size:38px;line-height:1.5}
article p{line-height:1.95}
.sidebar-title{font-size:25px;line-height:1.45}
.sidebar-row{font-size:16px;line-height:1.5}
.sidebar-banner{font-size:14px}
#local-progress-status{margin:32px 40px 24px 320px;text-align:center;color:#777;font-size:14px}
x-tutor .chat-footer .input:empty:before{content:"输入算式，或点灯泡查看学习提示";font-size:14px;color:#888;pointer-events:none}
.source-note{font-size:14px;color:#777;line-height:1.7;margin-top:32px}
@media(max-width:840px){#local-progress-status{margin-left:24px}article h1{font-size:30px}header nav .nav-link{min-width:80px}header #logo{padding:0 15px}}

header #logo{display:flex;align-items:center}header #logo img{display:block;width:40px;height:40px;object-fit:contain;border-radius:8px}

.graph-reveal-hint{font-size:13px;color:#6b7280;text-align:center;line-height:1.6;margin:10px 0}#graph0:not(.novertices):not(.noedges)+.graph-reveal-hint{display:none}