*{box-sizing:border-box}
:root{--bg:#f6f5f2;--panel:#fff;--text:#111;--muted:#686868;--line:#ddd9cf;--soft:#eeece6;--accent:#111}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.72}
a{color:inherit;text-decoration:none}.container{width:min(1120px,calc(100% - 40px));margin:0 auto}.narrow{width:min(820px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:10;background:rgba(246,245,242,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-size:20px;font-weight:850;letter-spacing:-.035em}
nav{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:14px}nav a:hover{color:var(--text)}
.hero{padding:82px 0 62px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center}
.eyebrow{margin:0 0 14px;font-size:13px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);font-weight:750}
h1,h2,h3,p{margin-top:0}h1{font-size:clamp(42px,7vw,76px);line-height:.98;letter-spacing:-.075em;margin-bottom:24px}
h2{font-size:clamp(30px,4vw,44px);line-height:1.1;letter-spacing:-.05em;margin-bottom:18px}h3{font-size:22px;letter-spacing:-.035em;margin-bottom:10px}
.lead{font-size:19px;color:var(--muted);max-width:720px}.button{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 20px;border-radius:999px;border:1px solid var(--accent);font-size:14px;font-weight:760}.primary{background:var(--accent);color:#fff}.secondary{background:transparent;color:var(--accent)}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}.card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 16px 48px rgba(17,17,17,.05)}
.hero-card{min-height:330px;display:flex;flex-direction:column;justify-content:flex-end}.card-label{display:inline-block;width:max-content;border:1px solid var(--line);border-radius:999px;padding:4px 10px;margin-bottom:22px;color:var(--muted);font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.section{padding:70px 0}.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-title{margin-bottom:30px}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.topic-grid p,.card p{color:var(--muted);margin-bottom:0}
.article-list{display:grid;gap:12px}.article{display:grid;grid-template-columns:180px 1fr;gap:20px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px}.article:hover{transform:translateY(-1px)}.article span{color:var(--muted);font-size:14px}.article strong{font-size:18px;letter-spacing:-.03em}
.note{margin-top:18px;color:var(--muted);font-size:14px}.site-footer{padding:28px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.footer-grid{display:flex;justify-content:space-between;gap:16px}.footer-grid p{margin-bottom:0}
.page-hero{padding:70px 0 34px}.post-grid{display:grid;grid-template-columns:1fr 280px;gap:44px;align-items:start}.post{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:42px}.post h1{font-size:clamp(36px,5vw,58px)}.post h2{font-size:30px;margin-top:42px}.post p,.post li{font-size:17px;color:#242424}.post ul{padding-left:22px}.meta{color:var(--muted);font-size:14px;margin-bottom:22px}.toc{position:sticky;top:96px;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px}.toc a{display:block;color:var(--muted);font-size:14px;margin:10px 0}.toc a:hover{color:var(--text)}
.disclaimer{background:#fbfaf7;border:1px solid var(--line);border-radius:18px;padding:18px;color:var(--muted);font-size:14px;margin-top:28px}.tag{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 10px;color:var(--muted);font-size:12px;margin:0 6px 8px 0}
@media(max-width:860px){.nav{align-items:flex-start;flex-direction:column;padding:18px 0}.hero-grid,.post-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr 1fr}.article{grid-template-columns:1fr;gap:6px}.footer-grid{flex-direction:column}.toc{position:static}}
@media(max-width:560px){.container,.narrow{width:min(100% - 28px,1120px)}.hero{padding-top:54px}.topic-grid{grid-template-columns:1fr}h1{font-size:42px}.post{padding:26px}}