:root{color-scheme:light;--ink:#173c31;--muted:#617069;--paper:#f6f5ee;--line:#d8dfd4;--accent:#d3ecb0}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;line-height:1.75}a{color:inherit;text-underline-offset:5px}a:hover{color:#2f6b4f}header,.wrap,footer{width:min(1120px,calc(100% - 48px));margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;font-weight:750;font-size:22px}.brand img{width:32px;height:32px;border-radius:8px}.brand small{font-size:12px;font-weight:500;color:var(--muted)}nav{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}nav a{text-decoration:none}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:64px;align-items:center;padding:80px 0 68px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:700;color:#4a7058}.hero h1{font-size:clamp(34px,4.8vw,58px);letter-spacing:-.05em;line-height:1.25;font-weight:650;margin:18px 0 22px}.lead{font-size:18px;color:var(--muted);max-width:32em}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.button{display:inline-block;padding:12px 21px;border:1px solid var(--ink);border-radius:30px;text-decoration:none;font-size:14px;font-weight:650;background:var(--ink);color:white}.button:hover{background:#285845;color:white}.button.secondary{background:transparent;color:var(--ink)}.note{color:var(--muted);font-size:13px}.reading{background:#fff;border:1px solid var(--line);border-radius:24px;padding:30px;box-shadow:0 18px 45px #173c310c;transform:rotate(1deg)}.reading .english{font-family:Georgia,serif;font-size:28px;line-height:1.65;margin:14px 0 24px}.reading mark{background:var(--accent);color:inherit;padding:0 4px;border-radius:4px}.word-card{background:#f3f7ef;border-radius:16px;padding:20px}.word-card strong{font-size:21px}.word-card p{margin:8px 0}.small-label{font-size:12px;letter-spacing:.05em;color:var(--muted)}.section{padding:48px 0;border-top:1px solid var(--line)}h2{font-weight:650;font-size:28px;letter-spacing:-.025em;margin:0 0 16px}h3{font-size:18px;margin:12px 0}p{margin:0 0 18px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:30px}.step{font-family:Georgia,serif;font-size:28px;color:#6d8b69}.card{padding:24px;border:1px solid var(--line);border-radius:18px;background:#ffffff60}.card p{color:var(--muted);font-size:15px;margin:0}.split{display:grid;grid-template-columns:1fr 1fr;gap:50px}.pill{display:inline-block;padding:3px 12px;border-radius:20px;background:#e4eadc;font-size:12px}.article{max-width:780px;padding:48px 0 64px}.article h1{font-size:36px;line-height:1.3;margin:12px 0 16px}.article h2{font-size:23px;margin-top:38px}.article ul,.article ol{padding-left:24px}.article li{margin-bottom:12px}.article code{font-size:13px;overflow-wrap:anywhere}.info{border-left:3px solid #86a36f;padding:16px 20px;background:#ecf0e5;margin:24px 0}.flow{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.flow span{padding:8px 14px;border-radius:8px;background:#e9efdf}footer{border-top:1px solid var(--line);padding:28px 0 36px;font-size:12px;color:var(--muted)}footer p{margin:4px 0}footer .links{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:12px}.mail{overflow-wrap:anywhere}@media(max-width:720px){header,.wrap,footer{width:calc(100% - 32px)}header{align-items:flex-start}.brand small{display:none}nav{gap:10px 16px;font-size:12px;max-width:180px;justify-content:flex-end}.hero{grid-template-columns:1fr;padding:42px 0;gap:30px}.hero h1{font-size:38px}.lead{font-size:16px}.reading{transform:none;padding:24px}.reading .english{font-size:25px}.grid,.split{grid-template-columns:1fr;gap:18px}.section{padding:32px 0}.article{padding-top:32px}.article h1{font-size:30px}.button{padding:11px 18px}.actions{gap:10px}}