:root{--bg: #fafaf9;--bg-alt: #f5f5f4;--text: #1c1917;--text-secondary: #78716c;--border: #e7e5e4;--border-hover: #d6d3d1;--accent: #18181b;--accent-hover: #27272a;--surface: #ffffff;--radius: 12px;--font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI Variable", "Segoe UI", "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;--line-height: 1.6}body[data-locale=zh]{font-family:PingFang SC,Microsoft YaHei,Hiragino Sans GB,-apple-system,BlinkMacSystemFont,sans-serif}body[data-locale=zh-TW]{font-family:PingFang TC,Microsoft JhengHei,-apple-system,BlinkMacSystemFont,sans-serif}body[data-locale=ja]{font-family:Hiragino Sans,Yu Gothic,Meiryo,-apple-system,BlinkMacSystemFont,sans-serif}body[data-locale=ko]{font-family:Apple SD Gothic Neo,Malgun Gothic,-apple-system,BlinkMacSystemFont,sans-serif}.lang-switcher{position:relative}.lang-switcher-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px 8px 10px;border:1px solid var(--border);border-radius:999px;background:none;color:var(--text-secondary);font-size:13px;font-weight:400;font-family:inherit;cursor:pointer;transition:color .2s,border-color .2s}.lang-switcher-btn:hover{color:var(--text);border-color:var(--text-secondary)}.lang-switcher-menu{display:none;position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%);background:#fff;border:1px solid var(--border);border-radius:12px;padding:6px;min-width:140px;box-shadow:none;z-index:10}.lang-switcher.open .lang-switcher-menu{display:block}.lang-switcher-option{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;font-size:14px;color:var(--text);text-decoration:none;border-bottom:none;transition:background .15s}.lang-switcher-option:hover{background:var(--bg-alt);border-bottom:none}.lang-switcher-option.active{font-weight:600;color:var(--accent)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-stack);line-height:var(--line-height);color:var(--text);background:var(--bg);padding:0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:720px;margin:0 auto;padding:32px 24px 60px}.legal-card{background:var(--surface);border-radius:20px;padding:48px;box-shadow:0 1px 3px #0000000a}.legal-header{margin-bottom:32px;padding-bottom:20px;border-bottom:1px solid rgba(0,0,0,.06)}.legal-logo{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);font-weight:700;font-size:.9375rem;border-bottom:none}.legal-logo:before{content:"←";margin-right:8px;font-size:14px;opacity:.4}.legal-logo:hover{opacity:.7;border-bottom:none}@media(max-width:768px){.legal-card{padding:28px 20px;border-radius:16px}}h1{font-size:1.75rem;font-weight:800;letter-spacing:-.5px;margin-bottom:8px;color:var(--text)}.updated{color:var(--text-secondary);font-size:.8125rem;margin-bottom:32px;opacity:.7}.subtitle{color:var(--text-secondary);font-size:.9375rem;margin-bottom:28px;line-height:1.6}h2{font-size:1.125rem;font-weight:700;margin-top:32px;margin-bottom:12px;color:var(--text)}h3{font-size:1rem;font-weight:600;margin-top:24px;margin-bottom:8px;color:var(--text)}p,ul{margin-bottom:16px;font-size:.9375rem;color:var(--text);opacity:.85;line-height:1.7}ul{padding-left:20px}li{margin-bottom:8px}a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}a:hover{border-bottom-color:var(--text-secondary)}kbd{display:inline-block;padding:2px 7px;font-size:.8125rem;font-family:var(--font-mono);background:var(--bg-alt);border:1px solid var(--border);border-radius:5px}details{border-bottom:1px solid rgba(0,0,0,.06)}details:first-of-type{border-top:1px solid rgba(0,0,0,.06)}summary{padding:16px 0;font-weight:600;font-size:.9375rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-weight:400;font-size:1.125rem;color:var(--text-secondary);opacity:.5;transition:transform .2s}details[open] summary:after{content:"−"}details div{padding-bottom:16px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}.card{background:var(--bg);border-radius:12px;padding:20px;transition:box-shadow .2s}.card:hover{box-shadow:0 2px 8px #0000000f}.card h3{margin-top:0}.legal-footer{max-width:720px;margin:0 auto;padding:32px 24px 48px;display:flex;flex-direction:column;align-items:center;gap:16px}.legal-footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px}.legal-footer-links a{color:var(--text-secondary);text-decoration:none;font-size:.8125rem;border-bottom:none;transition:color .2s}.legal-footer-links a:hover{color:var(--text);border-bottom:none}.legal-footer-bottom{display:flex;align-items:center;gap:12px;font-size:.75rem}.legal-footer-bottom>span{color:var(--text-secondary);opacity:.5}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}@media(max-width:768px){.container{padding:20px 12px 40px}h1{font-size:1.5rem}.card-grid{grid-template-columns:1fr}}