*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4a90d9;--primary-dark: #3a7bc8;--danger: #e74c3c;--text: #2c3e50;--text-light: #7f8c8d;--bg: #f5f6fa;--card: #ffffff;--border: #e8eaf0;--radius: 8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark)}.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:960px;margin:0 auto;padding:20px 16px;width:100%;flex:1}.navbar{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.navbar-inner{max-width:960px;margin:0 auto;padding:0 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