:root{--bg:#eef1f7;--panel:#fff;--panel2:#f6f8fb;--text:#23272f;--muted:#6b7686;--line:#e4e8f0;--accent:#5b5bd6;--accent2:#0ea5e9;--good:#16a34a;--radius:14px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#f2f5fb,var(--bg) 40%);color:var(--text);min-height:100vh}body.dark{--bg:#14161a;--panel:#1c1f26;--panel2:#242832;--text:#e5e9f0;--muted:#8b95a5;--line:#2e343f;background:linear-gradient(180deg,#181b21,var(--bg) 40%)}a{color:inherit;text-decoration:none}header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}body.dark header{background:rgba(24,27,33,.86)}.nav{max-width:1200px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px}.logo{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;color:#fff;font-size:20px;box-shadow:0 4px 12px rgba(91,91,214,.35)}.lang-switch{margin-left:auto;display:inline-flex;align-items:center;gap:2px;background:var(--panel2);border:1px solid var(--line);border-radius:999px;padding:3px}.lang-switch a{display:inline-flex;align-items:center;gap:4px;padding:5px 13px;border-radius:999px;font-size:13px;font-weight:600;color:var(--muted);text-decoration:none;transition:color .15s,background .15s}.lang-switch a:hover{color:var(--text);background:rgba(0,0,0,.04)}.lang-switch a.active{background:var(--accent);color:#fff;box-shadow:0 2px 6px rgba(91,91,214,.35)}.lang-switch a .globe{font-size:14px;opacity:.85}.wrap{max-width:1200px;margin:0 auto;padding:26px 20px 40px}.hero{text-align:center;padding:4px 0 20px}.hero h1{font-size:30px;font-weight:800;letter-spacing:-.5px}.hero p{color:var(--muted);margin-top:8px;font-size:15px}.hero .pill{display:inline-block;margin-top:14px;padding:6px 14px;border-radius:999px;background:#eef2ff;color:var(--accent);font-size:13px;font-weight:600}body.dark .hero .pill{background:#212a3d;color:#a5b4fc}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 30px rgba(40,50,70,.05);overflow:hidden}.toolbar{display:flex;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center}.toolbar .grp{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.toolbar .sep{width:1px;height:26px;background:var(--line);margin:0 4px}.btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:7px 13px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;transition:.15s;white-space:nowrap}.btn:hover{border-color:#c7cbe6;background:#f0f2fb}body.dark .btn:hover{border-color:#3a4150;background:#2b303b}.btn.on{background:var(--accent);border-color:var(--accent);color:#fff}.btn.danger{color:#dc2626}.sel{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:6px 10px;border-radius:9px;font-size:13px}textarea.editor{width:100%;min-height:60vh;border:none;resize:vertical;padding:18px 22px;font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-size:16px;line-height:1.7;color:var(--text);background:var(--panel);tab-size:4}textarea.editor:focus{outline:none}.findbar{display:none;gap:8px;padding:10px 14px;border-top:1px solid var(--line);align-items:center;flex-wrap:wrap}.findbar.open{display:flex}.findbar input{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:6px 10px;border-radius:8px;font-size:13px;flex:1;min-width:140px}.statusbar{display:flex;gap:18px;padding:11px 16px;border-top:1px solid var(--line);flex-wrap:wrap;font-size:12.5px;color:var(--muted)}.statusbar b{color:var(--text);font-variant-numeric:tabular-nums}.statusbar .save-state{margin-left:auto}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}.info-card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}.info-card h3{font-size:15px;font-weight:800;margin-bottom:8px}.info-card p{font-size:13.5px;color:var(--muted);line-height:1.65}footer{background:var(--panel);border-top:1px solid var(--line)}.foot{max-width:1200px;margin:0 auto;padding:22px 20px;text-align:center;color:var(--muted);font-size:13px;line-height:1.7}@media (max-width:700px){.info-grid{grid-template-columns:1fr}.hero h1{font-size:24px}textarea.editor{min-height:52vh;font-size:14px}.toolbar .sep{display:none}}