:root{--bg: #0e1014;--surface: #171a21;--surface-2: #1e222b;--border: #272c37;--text: #e8eaef;--muted: #9298a4;--accent: #6ea8fe;--accent-dim: #3a557f;--radius: 14px;--maxw: 760px;--font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang TC", "Microsoft JhengHei", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}.container{max-width:var(--maxw);margin:0 auto;padding:clamp(20px,5vw,48px) 20px}.btn{display:inline-flex;align-items:center;gap:8px;background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 16px;font:inherit;font-weight:600;font-size:14px;cursor:pointer;transition:border-color .15s,background .15s,transform .05s}.btn:hover{border-color:var(--accent-dim)}.btn:active{transform:translateY(1px)}.btn-accent{background:var(--accent);color:#0b1220;border-color:var(--accent)}.muted{color:var(--muted)}