*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color:#2c3e50;--secondary-color:#34495e;--accent-color:#3498db;--text-color:#2c3e50;--light-gray:#f8f9fa;--border-color:#e9ecef}body{font-family:PingFang SC,Microsoft YaHei,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--light-gray)}#app{min-height:100vh;display:flex;flex-direction:column}.main-nav{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.08);position:fixed;width:100%;top:0;z-index:1000;border-bottom:1px solid var(--border-color)}.nav-content{max-width:1400px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.logo img{height:45px;transition:transform .3s ease}.logo img:hover{transform:scale(1.05)}.nav-links{display:flex;gap:2.5rem}.nav-links a{text-decoration:none;color:var(--text-color);font-weight:500;font-size:1.05rem;transition:all .3s ease;position:relative;padding:.5rem 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