:root{--bg: #0d0f14;--bg-2: #14171f;--surface: #171b23;--surface-2: #1f2430;--border: #2a3040;--text: #eceef3;--muted: #8b92a0;--accent: #6ea8fe;--accent-dim: #3a557f;--radius: 16px;--maxw: 720px;--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%;overscroll-behavior:none}body{background:radial-gradient(1200px 700px at 50% -15%,var(--bg-2),transparent 70%),var(--bg);background-attachment:fixed;color:var(--text);font-family:var(--font);line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}a{color:inherit;text-decoration:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:12px;padding:11px 18px;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);background:var(--surface)}.btn:active{transform:translateY(1px)}.btn-accent{background:var(--accent);color:#0b1220;border-color:var(--accent)}.btn-accent:hover{background:#84b6ff;border-color:#84b6ff}.muted{color:var(--muted)}