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#2c211840}.sidebar.open{transform:translate(0)}.topbar{display:flex}.content{padding:24px 20px 20px}.course-nav{padding:22px 20px 4px}.cn-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.site-footer{padding:18px 20px 50px}.gains{grid-template-columns:1fr}.subnav{top:69px}h2.sec{scroll-margin-top:130px}h1.title{font-size:27px}.hero-card{padding:24px 20px}}.ic{vertical-align:-.14em;width:1em;height:1em;display:inline-block}.nav-ico{color:var(--green-mid)}.nav-ico .ic{width:18px;height:18px}.nav-item.active .nav-ico{color:var(--green-dark)}.cn-ico{color:var(--green-mid)}.cn-ico .ic{width:16px;height:16px}.cn-item.active .cn-ico{color:var(--green-dark)}.callout .ci{color:var(--green-mid);align-items:flex-start;line-height:1;display:flex}.callout .ci .ic{width:20px;height:20px}.callout.tip .ci{color:var(--green-mid)}.callout.warn .ci{color:#b07514}.callout.danger .ci{color:#bb5235}.tut-ico .ic{width:17px;height:17px}.cert-ico{color:#fff}.cert-ico .ic{width:42px;height:42px}.brand-mark .ic{width:21px;height:21px}.dd-ico .ic{width:18px;height:18px}.quiz-teaser .qt-ico{color:#fff}.quiz-teaser .qt-ico .ic{width:34px;height:34px}.result-ico{color:#fff}.result-ico .ic{width:40px;height:40px}.acc{border:1px solid var(--line);background:var(--surface);border-radius:14px;margin:12px 0;overflow:hidden}.acc-head{cursor:pointer;color:var(--ink);text-align:left;background:0 0;border:none;align-items:center;gap:14px;width:100%;padding:16px 20px;font-family:inherit;font-size:15px;font-weight:600;display:flex}.acc-head:hover{background:var(--surface-2)}.acc-arrow{color:var(--green-mid);margin-left:auto;transition:transform .25s}.acc.open .acc-arrow{transform:rotate(90deg)}.acc-body{background:var(--surface);max-height:0;transition:max-height .4s;overflow:hidden}.acc.open .acc-body{max-height:4000px}.acc-body-inner{border-top:1px solid var(--line);padding:16px 20px}.acc .sc-meta{color:var(--ink-soft);margin:4px 0;font-size:14px}.nav-item,.cn-item{text-decoration:none}