:root{--bg:#f6f3ec;--surface:#fff;--surface-2:#fbf9f4;--ink:#1b1a17;--secondary:#57534a;--muted:#8b857a;--border:#e4ded2;--border-strong:#d6cfc1;--accent:#9a3b1e;--accent-hover:#7e2e14;--accent-soft:#efe3d9;--font-head:"Source Serif 4",Georgia,serif;--font-body:"IBM Plex Sans",system-ui,sans-serif;--font-mono:"IBM Plex Mono",ui-monospace,monospace;--maxw:1200px;--readw:680px;--gutter:clamp(24px,5vw,64px)}@media (max-width:759px){:root{--gutter:20px}}:root[data-lang=zh]{--font-head:"Noto Serif SC",serif;--font-body:"Noto Sans SC","IBM Plex Sans",sans-serif}:root[data-theme=dark]{--bg:#141310;--surface:#1c1a16;--surface-2:#211e19;--ink:#f1ece2;--secondary:#bdb6a8;--muted:#8a8377;--border:#302c25;--border-strong:#3d382f;--accent:#d9744f;--accent-hover:#e68a66;--accent-soft:#2a211b}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#141310;--surface:#1c1a16;--surface-2:#211e19;--ink:#f1ece2;--secondary:#bdb6a8;--muted:#8a8377;--border:#302c25;--border-strong:#3d382f;--accent:#d9744f;--accent-hover:#e68a66;--accent-soft:#2a211b}}*{box-sizing:border-box}body,html{padding:0;margin:0}body{background:var(--bg);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}::selection{background:var(--accent-soft);color:var(--ink)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:8px}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}@keyframes fade-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fade-in .5s cubic-bezier(.2,.6,.2,1) both}@media (prefers-reduced-motion:reduce){.fade-in{animation:none}}.underline-hover{background-image:linear-gradient(var(--ink),var(--ink));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s ease}.underline-hover:hover{background-size:100% 1px}