:root{--bg:#f5f5f7;--fg:#1d1d1f;--mut:#6e6e73;--line:#d2d2d7;--card:#fff;--ok:#00a665}
:root[data-theme=dark]{--bg:#111113;--fg:#f5f5f7;--mut:#a1a1a6;--line:#2c2c2e;--card:#1c1c1e}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#111113;--fg:#f5f5f7;--mut:#a1a1a6;--line:#2c2c2e;--card:#1c1c1e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC",sans-serif}
.w{max-width:880px;margin:0 auto;padding:20px}
header,footer{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
a{color:inherit}
.logo{font-weight:700;text-decoration:none}
.btn{border:1px solid var(--line);background:var(--card);color:var(--fg);border-radius:999px;padding:8px 16px;cursor:pointer;font:inherit;font-size:14px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn.primary{background:var(--fg);color:var(--bg);border-color:transparent}
h1{font-size:clamp(32px,5vw,46px);line-height:1.15;margin:28px 0 12px;letter-spacing:-.02em}
.lede{font-size:18px;color:var(--mut);max-width:62ch}
section{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin:14px 0}
h2{font-size:18px;margin:0 0 8px}
p{margin:0 0 8px}
p:last-child{margin-bottom:0}
.mut{color:var(--mut)}
ul{margin:8px 0 0;padding-left:20px;color:var(--mut)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media(max-width:720px){.grid{grid-template-columns:1fr}}
.pack{display:grid;gap:8px;align-content:start}
.price{font-size:32px;font-weight:700;letter-spacing:-.03em}
.badge{display:inline-block;font-size:12px;border:1px solid var(--line);border-radius:999px;padding:2px 8px}
.form{display:grid;gap:10px}
textarea,input[type=text]{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--bg);color:var(--fg);font:15px/1.5 ui-monospace,monospace}
footer{margin:28px 0;font-size:14px;color:var(--mut)}
footer nav{display:flex;gap:14px;flex-wrap:wrap}
.links{display:flex;gap:8px;flex-wrap:wrap}
[data-l=en]{display:none}
html[lang=en] [data-l=zh]{display:none}
html[lang=en] [data-l=en]{display:revert}