:root{--paper:#f7fafc;--fg:#20354b;--muted:#52687a;--line:#d2dfe9;--soft:#eaf2f7;--accent:#b71943;--frost:#d9eaf580;--wash:#ffffffc9;color-scheme:light;font-family:'Plus Jakarta Sans',Arial,sans-serif}
:root[data-theme=dark]{--paper:#131e2b;--fg:#edf5fc;--muted:#bacddd;--line:#3b5269;--soft:#22364b;--accent:#ff9ab5;--frost:#31557533;--wash:#334e6226;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;color:var(--fg);font-size:14px;line-height:1.75;-webkit-font-smoothing:antialiased;background-color:var(--paper);background-image:url('winter-frost.svg'),radial-gradient(ellipse at 0% 15%,var(--frost),transparent 55%),linear-gradient(155deg,var(--wash),transparent 65%);background-size:1200px 900px,100vw 100vh,100vw 100vh;background-attachment:fixed}
.legal-header{position:sticky;top:0;z-index:100;background-color:var(--paper);background-image:url('winter-frost.svg'),radial-gradient(ellipse at 0% 15%,var(--frost),transparent 55%),linear-gradient(155deg,var(--wash),transparent 65%);background-size:1200px 900px,100vw 100vh,100vw 100vh;background-attachment:fixed}
.top{max-width:1160px;margin:auto;padding:0 42px;min-height:94px;display:flex;align-items:center;justify-content:space-between;gap:25px;position:relative}.top:after{content:'';position:absolute;bottom:0;left:42px;right:42px;border-bottom:2px solid var(--line)}
.brand{min-width:0}.brand img{display:block;width:211px;max-width:100%;height:auto}.header-controls{display:flex;align-items:center;gap:12px;flex-shrink:0}.toggle{display:flex;border:2px solid var(--line);border-radius:30px;padding:3px}.toggle button{border:0;background:transparent;color:var(--muted);border-radius:24px;padding:6px 10px;font:inherit;font-size:11px;line-height:1.6;cursor:pointer}.toggle button[aria-pressed=true]{background:#202e49;color:#fff}
.theme-toggle{display:grid;place-items:center;width:36px;height:36px;border:2px solid var(--line);border-radius:50%;background:var(--soft);color:var(--fg);padding:0;cursor:pointer}.sun{display:none}[data-theme=dark] .moon{display:none}[data-theme=dark] .sun{display:block}[data-theme=dark] .brand img{filter:drop-shadow(1px 0 0 white) drop-shadow(-1px 0 0 white) drop-shadow(0 1px 0 white) drop-shadow(0 -1px 0 white)}
.page{max-width:900px;margin:auto;padding:30px 42px 60px}.sheet{min-width:0}.back{display:inline-flex;gap:7px;font-size:12px;font-weight:600;text-decoration:none;margin-bottom:28px}a{color:var(--accent);text-underline-offset:3px;overflow-wrap:anywhere}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
h1{font-size:clamp(30px,5vw,46px);font-weight:600;letter-spacing:-.035em;line-height:1.15;margin:0 0 12px}h2{font-size:22px;line-height:1.4;font-weight:600;letter-spacing:-.02em;margin:34px 0 14px;padding-top:24px;border-top:1px solid var(--line);scroll-margin-top:110px}h3{font-size:16px;line-height:1.5;font-weight:700;margin:24px 0 10px}p,ul{margin:0 0 16px}ul{padding-left:22px}li{margin:0 0 8px}.meta{color:var(--muted);font-size:13px;margin-bottom:10px}.updated{display:inline-block;font-size:12px;color:var(--accent);background:var(--soft);border:1px solid var(--line);padding:5px 12px;border-radius:999px;margin-bottom:12px}.foot{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}body[data-lang=en] .zh,body[data-lang=zh] .en{display:none}::selection{background:#c6204c;color:white}
@media(max-width:850px){.top{padding:0 27px;gap:14px}.top:after{left:27px;right:27px}.brand img{width:175px}}
@media(max-width:640px){.top{padding:0 20px;min-height:82px;gap:8px}.top:after{left:20px;right:20px}.brand img{width:160px}.header-controls{gap:8px}.page{padding:24px 20px 40px}body,.legal-header{background-size:520px 780px,100vw 100vh,100vw 100vh}h2{font-size:20px}.theme-toggle{width:34px;height:34px}}
@media(pointer:coarse){.theme-toggle{width:44px;height:44px}.toggle button{min-height:36px}}