:root{color-scheme:light;--ink:#17212b;--muted:#67727d;--line:#d8dee4;--soft:#f4f6f8;--blue:#1769aa;--red:#c83232;--green:#0f7a5c;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#fff;font-size:14px;line-height:1.65}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.portal-header{height:48px;border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}.portal-header-inner{max-width:1240px;height:48px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:0 18px}.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-size:17px}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:30px;height:30px;background:var(--red);color:#fff;font-size:12px;font-weight:800}.portal-header nav{display:flex;gap:24px}.portal-header nav a{color:#37424d}.portal-grid{width:min(1240px,calc(100% - 32px));margin:20px auto 48px;display:grid;grid-template-columns:170px minmax(0,1fr) 260px;gap:24px;align-items:start}.portal-left,.portal-right{position:sticky;top:68px}.portal-left h2,.portal-right h2{font-size:15px;margin:0 0 10px;padding-bottom:8px;border-bottom:2px solid var(--ink)}.portal-left nav{display:grid}.portal-left nav a{padding:8px 10px;color:#3f4a55;border-bottom:1px solid #edf0f2}.rail-note{margin-top:18px;padding:12px;background:var(--soft);color:var(--muted);font-size:12px}.portal-feed{min-width:0;border-left:1px solid var(--line);border-right:1px solid var(--line);padding:0 22px}.feed-heading{display:flex;justify-content:space-between;align-items:end;border-bottom:2px solid var(--ink);padding-bottom:13px}.feed-heading h1{font-size:24px;line-height:1.2;margin:3px 0 0;letter-spacing:0}.eyebrow{font-size:11px;color:var(--red);font-weight:700}.feed-heading>span{color:var(--muted);font-size:12px}.feed-row{padding:18px 0;border-bottom:1px solid var(--line)}.feed-row-type{font-size:12px;color:var(--green);font-weight:700}.feed-row h2{font-size:18px;line-height:1.4;margin:4px 0 7px;letter-spacing:0}.feed-row h2 a{color:var(--ink)}.feed-row p{margin:0 0 11px;color:#4e5964;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.feed-row-meta,.article-byline{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:12px}.author-meta{display:flex;align-items:center;gap:8px;color:var(--ink)}.author-meta:hover{text-decoration:none}.author-meta img{width:40px;height:40px;object-fit:cover;border:1px solid var(--line);border-radius:4px}.author-meta span{display:grid}.author-meta small{color:var(--muted)}.score{color:var(--red);font-weight:700}.portal-right ol{list-style:none;margin:0;padding:0}.portal-right li{display:grid;grid-template-columns:22px 1fr;gap:0 8px;padding:9px 0;border-bottom:1px solid #edf0f2}.portal-right li>span{grid-row:1/3;color:var(--red);font-weight:800}.portal-right li a{color:var(--ink);line-height:1.35}.portal-right li small{color:var(--muted)}.portal-article{min-width:0;padding:3px 22px 24px;border-left:1px solid var(--line);border-right:1px solid var(--line)}.article-kicker{font-size:12px;color:var(--green);font-weight:700}.portal-article h1{font-size:30px;line-height:1.3;margin:8px 0 16px;letter-spacing:0}.article-byline{border-bottom:1px solid var(--line);padding-bottom:16px}.article-excerpt{font-size:16px;color:#4e5964;background:var(--soft);padding:14px;margin:20px 0}.article-body{font-size:16px;margin-top:24px}.article-body h2{font-size:22px;margin:32px 0 12px;letter-spacing:0}.article-body h3{font-size:18px;margin:24px 0 10px;letter-spacing:0}.article-body img{max-width:100%;height:auto}.article-body pre{max-width:100%;overflow:auto;background:#17212b;color:#f6f8fa;padding:14px}.article-body table{display:block;max-width:100%;overflow:auto;border-collapse:collapse}.article-body th,.article-body td{border:1px solid var(--line);padding:7px 10px}.article-links{display:grid;gap:7px;margin-top:30px;padding-top:18px;border-top:1px solid var(--line)}.author-card{border-bottom:1px solid var(--line);padding-bottom:16px}.author-card h1{font-size:24px;margin:12px 0 0}.portal-footer{min-height:58px;border-top:1px solid var(--line);display:flex;justify-content:center;align-items:center;gap:24px;color:var(--muted);font-size:12px;padding:14px 20px}@media(max-width:900px){.portal-header nav{gap:12px}.portal-grid{grid-template-columns:1fr;width:min(100% - 24px,720px);margin-top:14px}.portal-left,.portal-right{position:static}.portal-left{display:none}.portal-right{border-top:1px solid var(--line);padding-top:16px}.portal-feed,.portal-article{border-left:0;border-right:0;padding:0}.portal-article h1{font-size:26px}}@media(max-width:520px){.portal-header nav a:nth-child(n+3){display:none}.portal-grid{width:calc(100% - 24px);gap:18px}.feed-heading{align-items:start}.feed-heading h1{font-size:21px}.feed-row h2{font-size:17px}.feed-row-meta{flex-wrap:wrap}.portal-article h1{font-size:24px}.portal-footer{flex-direction:column;gap:4px}}