:root { --bg: #f6f4ef; --ink: #1d1c1a; --muted: #6b675f; --line: #d9d4c9; --seal: #B0432F; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #141412; --ink: #ece8df; --muted: #9a958b; --line: #34322d; }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--ink); font-family: "IBM Plex Sans", "Noto Serif TC", system-ui, sans-serif;
       line-height: 1.7; -webkit-font-smoothing: antialiased; }
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 64px; }
.top { display: inline-flex; border: none; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.top svg { width: 36px; height: 36px; margin: -5px; }
.top b { font-family: "Newsreader", serif; font-weight: 800; font-size: 20px; letter-spacing: -.4px; }
.top b i { font-style: normal; color: var(--seal); }
h1 { margin-top: 48px; font-family: "Newsreader", "Noto Serif TC", serif; font-weight: 400; font-size: 34px; line-height: 1.2; }
.sub { color: var(--muted); margin-top: 6px; }
.lang { margin-top: 20px; font-size: 14px; }
.lang a { color: var(--muted); }
h2 { margin-top: 44px; padding-bottom: 8px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 500;
     letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-family: "IBM Plex Mono", ui-monospace, monospace; }
h3 { margin-top: 26px; font-size: 17px; font-weight: 500; }
p, li { margin-top: 10px; font-size: 16px; }
ul { padding-left: 1.2em; }
a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); }
a:hover { border-color: var(--ink); }
.mail { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 15px; }
footer { margin-top: 56px; color: var(--muted); font-size: 13px; }

.langsw { display: inline-flex; align-items: center; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; }
.langsw a { display: block; padding: 6px 13px; border-radius: 999px; line-height: 1; font: 400 13px "Newsreader", "Noto Serif TC", serif;
  letter-spacing: .08em; color: var(--muted); background: none; border: 0; cursor: pointer; transition: color .2s, background .2s; white-space: nowrap; }
.langsw a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 7%, transparent); }
.langsw b { display: block; padding: 6px 13px; border-radius: 999px; line-height: 1; font: 400 13px "Newsreader", "Noto Serif TC", serif; letter-spacing: .08em; color: var(--bg, #141412); background: var(--ink); }
.lang { display: flex; justify-content: space-between; align-items: center; }
@media (max-width: 760px) { .langsw { gap: 2px; padding: 3px; } .langsw a { padding: 6px 10px; font-size: 12px; letter-spacing: .04em; } }