:root{--ink: #0a0e17;--raise: #111726;--line: rgba(151, 170, 210, .14);--text: #eaf0fb;--muted: #8e9bb5;--cyan: #5ee7ff;--violet: #8b7cff;--ai-light: linear-gradient(92deg, var(--cyan), var(--violet));--font-en: "Space Grotesk", ui-sans-serif, -apple-system, "Helvetica Neue", Arial, sans-serif;--font-zh: -apple-system, "PingFang SC", "MiSans", "Noto Sans SC", "Microsoft YaHei", sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, monospace;--maxw: 1120px;--r-s: 10px;--r-m: 16px;--r-l: 24px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--ink);color:var(--text);font-family:var(--font-en);-webkit-font-smoothing:antialiased;line-height:1.6}body[data-lang=zh]{font-family:var(--font-zh)}img{max-width:100%}a{color:inherit;text-decoration:none}::selection{background:#5ee7ff40}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:#0a0e17b8;border-bottom:1px solid 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