*{margin:0;padding:0;box-sizing:border-box}body{font-family:PingFang SC,Microsoft YaHei,sans-serif;color:#333;line-height:1.6;background-color:#f5f5f5}.app-container{display:flex;flex-direction:column;min-height:100vh}.header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background-color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.1);z-index:10;position:relative}.logo{font-size:1.5rem;font-weight:700}.logo a{color:#ff6b6b;text-decoration:none}.nav{display:flex;gap:1.5rem}.nav a{color:#555;text-decoration:none;font-weight:500;transition:color .3s}.nav a.router-link-active,.nav a:hover{color:#ff6b6b}.main-content{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%;position:relative}.footer{background-color:#333;color:#fff;text-align:center;padding:1rem;margin-top:auto;position:relative;z-index:5}