:root{--ink:#123d3e;--muted:#607d7e;--teal:#087d78;--line:#dcecea;--bg:#f7fffd}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}.wrap{width:min(960px,calc(100% - 36px));margin:auto}header{border-bottom:1px solid var(--line);background:#fff}.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:20px;font-weight:800}.brand span{display:inline-grid;place-items:center;width:34px;height:34px;margin-right:8px;border-radius:11px;background:linear-gradient(145deg,#16c9b0,#087d78);color:#fff}.back{color:var(--teal);font-size:14px}main{padding:64px 0 80px}.kicker{color:#11a495;font-size:13px;font-weight:800;letter-spacing:.08em}.title{font-size:42px;line-height:1.2;margin:10px 0 12px}.lead{font-size:18px;color:var(--muted);margin:0 0 36px}.card{padding:30px;border:1px solid var(--line);border-radius:20px;background:#fff;margin:16px 0;box-shadow:0 12px 28px #187f7510}.card h2{font-size:21px;margin:0 0 12px}.card h3{font-size:16px;margin:20px 0 5px}.card p,.card li{color:#486869;font-size:14px}.meta{color:#819899;font-size:13px;margin-top:36px}footer{border-top:1px solid var(--line);padding:26px 0;color:#789091;font-size:13px}@media(max-width:600px){main{padding:42px 0}.title{font-size:34px}.card{padding:22px}}