:root{--bg:#0a0b0e;--bg2:#101218;--border:#23273a;--text:#e8ecf4;--muted:#9aa3b8;--accent:#6366f1;--accent2:#8b5cf6}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
.lwrap{max-width:820px;margin:0 auto;padding:40px 22px 80px}
.lback{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;text-decoration:none;margin-bottom:30px}
.lback:hover{color:var(--text)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;margin-bottom:28px}
.logo .mark{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;padding-left:2px;flex:none}
.logo{gap:9px}
.logo .wm{font-weight:800;line-height:1;white-space:nowrap}
.logo .wm span{font-weight:500;color:var(--muted)}
h1{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-bottom:8px}
.lwrap>p.sub{color:var(--muted);font-size:14px;margin-bottom:30px}
h2{font-size:19px;font-weight:700;margin:28px 0 10px}
h3{font-size:16px;font-weight:600;margin:18px 0 6px}
p,li{color:var(--text);font-size:15px;margin-bottom:10px}
a{color:var(--accent)}
ul,ol{margin:0 0 10px 22px}
.note{background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.3);border-radius:10px;padding:14px 16px;font-size:13.5px;color:var(--muted);margin:18px 0}
hr{border:none;border-top:1px solid var(--border);margin:30px 0}
footer{border-top:1px solid var(--border);padding:24px 0;color:var(--muted);font-size:13px;text-align:center}
.ltop{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.ltop .logo{margin-bottom:0}
.langsw{display:inline-flex;border:1px solid var(--border);border-radius:8px;overflow:hidden;font-size:12px;font-weight:700}
.langsw span{padding:5px 9px;cursor:pointer;color:var(--muted);transition:.15s;user-select:none}
.langsw span.on{background:var(--accent);color:#fff}
.langsw span:not(.on):hover{color:var(--text)}