:root{--bg: #0f172a;--text: #f8fafc;--muted: #94a3b8;--cyan: #06b6d4;--violet: #8b5cf6;--card: #111827;--line: #1e293b;--max: 1120px}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text)}body{font-family:PingFang SC,Noto Sans SC,Microsoft YaHei,Source Han Sans SC,sans-serif;line-height:1.65}a{color:inherit}img{max-width:100%}.wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}.site-header{position:sticky;top:0;z-index:20;background:#0f172aeb;border-bottom:1px solid var(--line)}.site-header-inner{display:flex;align-items:center;gap:16px;min-height:64px}.wordmark{font-weight:700;letter-spacing:.04em;text-decoration:none}.nav-links{display:flex;gap:18px;flex:1}.nav-links a{text-decoration:none;color:var(--muted)}.nav-links a.router-link-active{color:var(--text)}.lang-switch{display:flex;gap:8px;margin-left:auto}.lang-switch a,.lang-switch button{background:none;border:0;color:var(--muted);cursor:pointer;text-decoration:none;padding:0}.lang-switch [aria-current=true]{color:var(--cyan)}.menu-button{display:none;background:none;border:1px solid var(--line);color:var(--text);padding:6px 10px}.site-footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:14px}.site-footer p{margin:0 0 8px}.cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}.card{background:var(--card);border:1px solid var(--line);padding:20px;transition:transform .16s ease}.card:hover{transform:translateY(-3px)}.card.ai{border-top:2px solid var(--cyan)}.card.game{border-top:2px solid var(--violet)}.btn{display:inline-block;text-decoration:none;padding:10px 16px;border:1px solid var(--cyan);color:var(--text)}.btn.game{border-color:var(--violet)}.hero{padding:56px 0 32px}.hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;margin:0 0 12px}.muted{color:var(--muted)}.stack{display:flex;flex-direction:column;gap:12px}.section{padding:28px 0}.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}@media(max-width:768px){.menu-button{display:inline-block}.nav-links{display:none;position:absolute;left:0;right:0;top:64px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:16px}.nav-links.open{display:flex}.cards{grid-template-columns:1fr}.btn{width:100%;text-align:center}}