:root{--color-fg: #1a1a1a;--color-fg-soft: #2e2a26;--color-muted: #807766;--color-bg: #faf6ed;--color-surface: #ffffff;--color-accent: #b9342a;--color-accent-soft: #f0d8d4;--color-cream: #f4ebe1;--color-cream-deep: #ead9c5;--color-border: #e8ddc9;--color-border-soft: #f0e6d4;--max-width: 720px;--content-width: 980px;--serif-zh: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;--serif-en: "Source Serif 4", "Charter", "Iowan Old Style", "Georgia", serif;--sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", monospace}*,*:before,*:after{box-sizing:border-box}html{font-family:var(--sans);font-size:17px;line-height:1.85;color:var(--color-fg);background:var(--color-bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}body{margin:0;padding:0}.site-header{background:var(--color-bg);border-bottom:1px solid var(--color-border)}.site-header .row{max-width:var(--content-width);margin:0 auto;padding:22px 28px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.brand-block{display:flex;align-items:baseline;gap:12px;text-decoration:none}.brand-block .brand-name{font-family:var(--serif-zh);font-size:1.55rem;font-weight:900;color:var(--color-fg);letter-spacing:.005em}.brand-block .brand-section{font-family:var(--serif-zh);font-size:.85rem;color:var(--color-muted);font-weight:500;letter-spacing:.04em}.brand-block:hover .brand-name{color:var(--color-accent)}.header-meta{display:flex;align-items:center;gap:18px;font-size:.88rem}.header-meta .lang-link{color:var(--color-fg-soft);text-decoration:none;font-weight:700;padding:4px 10px;border:1px solid var(--color-border);border-radius:3px}.header-meta .lang-link:hover{color:var(--color-accent);border-color:var(--color-accent)}.cat-nav{max-width:var(--content-width);margin:0 auto;padding:18px 28px 20px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;font-family:var(--sans);font-size:.92rem;font-weight:600;letter-spacing:.04em}.cat-nav .cat-list{display:flex;gap:32px;flex-wrap:wrap}.cat-nav a{color:var(--color-fg-soft);text-decoration:none;padding:4px 0 6px;border-bottom:2px solid transparent;transition:color .15s ease,border-color .15s ease}.cat-nav a:hover,.cat-nav a.active{color:var(--color-accent);border-bottom-color:var(--color-accent)}.cat-nav .main-site{font-family:var(--serif-zh);font-size:.88rem;font-weight:500;letter-spacing:0;color:var(--color-muted);white-space:nowrap}.cat-nav .main-site:after{content:" ↗";font-size:.85em;color:var(--color-muted)}.cat-nav .main-site:hover{color:var(--color-accent);border-bottom-color:transparent}.cat-nav .main-site:hover:after{color:var(--color-accent)}.nav-divider{max-width:var(--content-width);margin:0 auto;border-top:1px solid var(--color-border)}main{max-width:var(--max-width);margin:0 auto;padding:56px 28px 72px}main.wide{max-width:var(--content-width)}h1,h2,h3,h4{font-family:var(--serif-zh);font-weight:700;line-height:1.4;color:var(--color-fg);letter-spacing:.005em}h1{font-size:2.1rem;margin:0 0 10px;letter-spacing:-.005em}h2{font-size:1.45rem;margin:3rem 0 1rem;padding-bottom:8px;border-bottom:2px solid var(--color-cream-deep)}h3{font-size:1.18rem;margin:2.2rem 0 .8rem}p{margin:0 0 1.3rem;color:var(--color-fg)}a{color:var(--color-accent);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}strong{font-weight:700;color:var(--color-fg)}em{font-style:italic;color:var(--color-fg-soft)}blockquote{margin:2rem 0;padding:8px 0 8px 22px;border-left:3px solid var(--color-accent);color:var(--color-fg-soft);font-style:italic;font-family:var(--serif-zh)}blockquote p{margin-bottom:.6rem}ul,ol{padding-left:1.6rem;margin:0 0 1.4rem}li{margin:.5rem 0}hr{border:none;height:1px;background:var(--color-border);margin:3rem auto;max-width:80px}pre,code{font-family:var(--mono)}pre{background:#2e2a26;color:#f4ebe1;padding:18px 20px;border-radius:6px;overflow-x:auto;font-size:.85rem;line-height:1.7;margin:1.6rem 0}:not(pre)>code{background:var(--color-cream);color:var(--color-accent);padding:.12rem .4rem;border-radius:3px;font-size:.88em}img{max-width:100%;height:auto;border-radius:4px;margin:1.5rem auto;display:block}table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.95rem}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--color-border-soft)}th{font-weight:600;background:var(--color-cream);color:var(--color-fg);font-family:var(--serif-zh)}.article-meta{color:var(--color-muted);font-size:.9rem;margin:0 0 2.6rem;font-family:var(--sans);padding-bottom:1.4rem;border-bottom:1px solid var(--color-border-soft);text-transform:uppercase;letter-spacing:.05em}.cta-box{margin:3rem 0 2rem;padding:24px 28px;background:var(--color-cream);border-radius:6px;border-left:4px solid var(--color-accent);font-family:var(--serif-zh)}.cta-box p{margin:0;font-size:1.05rem;color:var(--color-fg);line-height:1.7}.cta-box a{font-weight:700;text-decoration:none;color:var(--color-accent);border-bottom:2px solid var(--color-accent);padding-bottom:1px}.cta-box a:hover{background:var(--color-accent);color:#fff;padding:1px 6px;border-bottom-color:transparent;margin:0 -6px;border-radius:3px}.site-footer{border-top:1px solid var(--color-border);margin-top:4rem;padding:28px 28px 32px;background:var(--color-bg)}.site-footer .row{max-width:var(--content-width);margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;font-size:.85rem;color:var(--color-muted)}.site-footer .footer-left{font-family:var(--serif-zh)}.site-footer .footer-right{display:flex;gap:20px;font-family:var(--sans)}.site-footer a{color:var(--color-muted);text-decoration:none;border-bottom:none}.site-footer a:hover{color:var(--color-accent)}@media(max-width:700px){html{font-size:16px}h1{font-size:1.7rem}h2{font-size:1.3rem}main{padding:32px 18px 48px}.site-header .row{padding:16px 18px 0}.cat-nav{padding:12px 18px 14px;gap:10px;font-size:.9rem;flex-direction:column;align-items:flex-start}.cat-nav .cat-list{gap:18px;width:100%;overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}.cat-nav a{white-space:nowrap}.cat-nav .main-site{font-size:.82rem}.site-footer{padding:22px 18px 24px}.site-footer .row{font-size:.8rem}.cta-box{padding:18px 20px}.brand-block .brand-name{font-size:1.3rem}}