:root{color-scheme:light;--paper:#f5f5ed;--ink:#183d32;--muted:#64736b;--line:#d9dfd2;--lime:#dcec9d}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}a:focus-visible{outline:3px solid #648641;outline-offset:6px}.wrap{width:min(1040px,calc(100% - 64px));margin-inline:auto}.header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:24px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:21px;font-weight:750}.mark{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:var(--lime);font-size:29px;font-weight:850;line-height:1}.header nav{display:flex;gap:30px;font-size:14px}.hero{padding:80px 0 66px;max-width:840px}.eyebrow,.category{font-size:13px;font-weight:650;letter-spacing:.09em;color:var(--muted);margin:0 0 18px}h1{font-size:clamp(36px,5vw,60px);line-height:1.3;letter-spacing:-.035em;margin:0 0 28px;font-weight:800}.intro{max-width:665px;margin:0 0 30px;font-size:18px;line-height:1.9;color:#4c6156}.button{display:inline-flex;gap:32px;align-items:center;padding:12px 22px;background:var(--ink);color:#fff;border-radius:7px;font-size:15px;font-weight:650}.topics{display:flex;flex-wrap:wrap;gap:20px;margin-top:30px;font-size:13px;color:var(--muted)}.topics span+span{border-left:1px solid var(--line);padding-left:20px}.notes{padding-bottom:50px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--ink);padding-bottom:18px}.section-head h2{font-size:24px;margin:0}.section-head>span{color:var(--muted);font-size:13px}.article{display:grid;grid-template-columns:62px 1fr;gap:20px;padding:30px 0;border-bottom:1px solid var(--line)}.number{font-size:28px;color:#91a074;font-weight:700;font-variant-numeric:tabular-nums}.category{margin:0 0 7px;font-size:12px}.article h3{margin:0 0 10px;font-size:22px;line-height:1.5}.article h3 span{display:inline-block;margin-left:8px;color:#7a9269}.article p:not(.category){margin:0;color:#53655b;font-size:15px}.article p.source{margin-top:11px;font-size:12px;color:#758276}.about{margin:10px 0 60px;background:#e9eedb;padding:32px 38px;border-radius:8px}.about .eyebrow{margin-bottom:10px}.about h2{margin:0 0 12px;font-size:24px}.about>p:last-child{margin:0;max-width:760px;font-size:15px;color:#53655b}.footer{border-top:1px solid var(--line);background:#ecefe3}.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding-block:25px;font-size:13px;color:#53655b}.footer p{margin:0}.footer a{text-decoration:underline;text-underline-offset:4px}
@media(max-width:600px){.wrap{width:calc(100% - 36px)}.header{padding-block:18px;gap:12px}.brand{font-size:17px;gap:9px}.mark{width:33px;height:33px;font-size:23px}.header nav{gap:14px;font-size:12px}.hero{padding:52px 0 42px}.intro{font-size:16px}.article{grid-template-columns:35px 1fr;gap:12px;padding:24px 0}.number{font-size:22px}.article h3{font-size:19px}.section-head h2{font-size:21px}.about{padding:25px 22px;margin-bottom:35px}.about h2{font-size:21px}.footer-inner{flex-direction:column;gap:5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Article sharing: 2026-10-10. */
.shares{padding-bottom:64px;scroll-margin-top:24px}.shared-feature{display:grid;grid-template-columns:1.12fr 1fr;align-items:center;gap:32px;padding:30px 0;border-bottom:1px solid var(--line)}.shared-cover{display:block;border-radius:8px;overflow:hidden}.shared-cover img{width:100%;height:auto}.shared-copy h3{font-size:26px;line-height:1.5;margin:0 0 12px;letter-spacing:-.015em}.shared-copy>p:not(.category){color:#53655b;font-size:15px;margin:0 0 18px}.shared-copy>p.shared-meta{font-size:12px;color:var(--muted)}.shared-copy .button{font-size:14px;padding:10px 18px;gap:22px}
.reading-header{padding:42px 0 28px}.breadcrumb{font-size:13px;color:var(--muted);margin:0 0 26px}.reading-header .eyebrow{margin-bottom:14px}.reading-header h1{font-size:clamp(30px,4.2vw,46px);line-height:1.45;letter-spacing:-.02em;max-width:890px;margin-bottom:18px}.reading-lede{max-width:760px;font-size:17px;line-height:1.85;color:#53655b;margin:0 0 18px}.reading-meta{font-size:13px;color:var(--muted);margin:0}.reading-cover{margin:0 0 34px}.reading-cover img{width:100%;height:auto;border-radius:8px}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:30px;align-items:start;padding-bottom:56px}.article-content{padding:30px 34px;border:1px solid var(--line);border-radius:8px;background:#fff;min-width:0;overflow-wrap:anywhere}.article-content h2:first-child{margin-top:0!important}.article-content h2,.article-content h3{scroll-margin-top:24px}.article-content img{max-width:100%;height:auto}.article-content a{overflow-wrap:anywhere}.article-content a:hover{text-decoration:underline}.article-toc{position:sticky;top:28px;padding:20px 0;border-top:1px solid var(--ink)}.article-toc>p{font-size:14px;font-weight:750;margin:0 0 16px}.article-toc ol{list-style:none;padding:0;margin:0;display:grid;gap:17px}.article-toc a{font-size:13px;line-height:1.7;color:#53655b}.article-toc a:hover{color:var(--ink)}.article-toc span{font-size:11px;font-variant-numeric:tabular-nums;color:#758276;margin-right:7px}.reading-return{margin:0 0 18px}.reading-return a{font-size:14px;text-decoration:underline;text-underline-offset:4px}
@media(max-width:850px){.reading-layout{grid-template-columns:minmax(0,1fr)}.article-toc{display:none}.shared-feature{gap:24px}.shared-copy h3{font-size:22px}}
@media(max-width:600px){.header{flex-wrap:wrap}.header nav{width:100%;padding-top:8px;gap:22px}.shares{padding-bottom:42px}.section-head{flex-wrap:wrap;gap:8px}.shared-feature{grid-template-columns:1fr;gap:22px;padding:24px 0}.shared-copy h3{font-size:23px}.reading-header{padding:30px 0 24px}.breadcrumb{margin-bottom:22px}.reading-lede{font-size:16px}.reading-cover{margin-bottom:24px}.article-content{padding:22px 18px}.reading-layout{padding-bottom:36px}}