:root{color-scheme:light dark;--bg:#f4f7f3;--card:#fff;--text:#263d2f;--muted:#62736a;--accent:#397349;--line:#d9e3da;font:16px/1.65 system-ui,"Microsoft Yahei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}main{max-width:780px;margin:48px auto;padding:0 24px}.brand{display:flex;gap:12px;align-items:center;font-weight:700;text-decoration:none}h1{font-size:36px;letter-spacing:-1px;margin:32px 0 4px}h2{font-size:20px;margin:0 0 12px}p{margin:10px 0 20px}a{color:var(--accent)}.muted{color:var(--muted);font-size:14px}.plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.plan,form,#billing-order{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;margin:24px 0}.plan{margin:0}.price{font-size:30px;font-weight:650}.price span{font-size:14px;font-weight:400;color:var(--muted)}.plans{margin-top:24px}.account{display:flex;align-items:center;justify-content:space-between;margin-top:30px}button{min-height:44px;cursor:pointer;background:var(--accent);color:#fff;border:0;border-radius:10px;padding:10px 18px;font:inherit}button:disabled{opacity:.5;cursor:not-allowed}.secondary{color:var(--accent);background:transparent;border:1px solid var(--line)}label{display:block;margin:12px 0}input{width:100%;min-height:46px;font:inherit;border:1px solid var(--line);border-radius:8px;padding:8px;background:var(--card);color:var(--text)}#order-qr{display:block;background:#fff;border-radius:8px;margin:16px 0}#billing-feedback{color:var(--accent)}[hidden]{display:none!important}@media(max-width:520px){main{margin-top:24px;padding:0 18px}.plans{grid-template-columns:1fr}.plan{padding:20px}h1{font-size:30px}}@media(prefers-color-scheme:dark){:root{--bg:#15231c;--card:#1d2f24;--text:#e1ece5;--muted:#a3b7aa;--accent:#73b484;--line:#354b3d}button{color:#14251a}}
:root:has(#billing-order[open]){overflow:hidden}
#billing-order{width:min(420px,calc(100% - 32px));max-height:calc(100dvh - 32px);margin:auto;padding:24px;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:20px;box-shadow:0 24px 80px #0004;overflow:auto;text-align:center}
#billing-order::backdrop{background:#07120bcc;backdrop-filter:blur(4px)}
.order-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left}
.order-heading h2{margin:0}.order-heading button{flex:none;width:44px;padding:0;font-size:28px;line-height:1}
#billing-order .order-price{margin:14px 0 18px;font-size:24px;font-weight:650}
#billing-order #order-qr{width:min(256px,100%);height:auto;aspect-ratio:1;margin:0 auto 18px}
#billing-order .order-help{margin:0 0 16px}
#billing-order #order-state{margin:0;color:var(--accent);font-size:14px}
@media(max-height:540px){#billing-order{padding:16px}#billing-order #order-qr{width:180px;margin-bottom:10px}#billing-order .order-price{margin:8px 0}#billing-order .order-help{margin-bottom:8px}}