/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #1a1a1a;
    color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
/* 顶部导航栏 */
.top-nav {
    background: #000;
    padding: 0;
    border-bottom: 2px solid #333;
}
.top-nav-container {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    padding: 0 20px;
    position: relative;
}
.nav-left {
    display: flex;
    gap: 30px;
    align-items: center;
    flex: 1;
}
.nav-left a {
    color: #999;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    transition: color 0.3s;
}
.nav-left a:hover {
    color: #fff;
}
.logo {
    font-size: 36px;
    font-weight: bold;
    color: #ff3333;
    text-decoration: none;
    letter-spacing: 2px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.nav-right {
    display: flex;
    gap: 20px;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
}
.nav-right a {
    color: #999;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    transition: color 0.3s;
}
.nav-right a:hover {
    color: #fff;
}
.btn-login {
    background: #ff3333;
    color: white;
    padding: 8px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}
.btn-login:hover {
    background: #ff5555;
    transform: translateY(-2px);
}
.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}
.user-info .username {
    color: #fff;
    font-size: 14px;
}
.user-info .btn-center {
    background: #ff3333;
    color: white;
    padding: 8px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}
.user-info .btn-center:hover {
    background: #ff5555;
    transform: translateY(-2px);
}
.user-info .btn-logout {
    background: #333;
    color: #999;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}
.user-info .btn-logout:hover {
    background: #444;
    color: #fff;
}
/* 底部 */
.footer {
    background: #000;
    padding: 40px 0 20px;
    margin-top: 80px;
    border-top: 2px solid #333;
}
.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    list-style: none;
}
.footer-links a {
    color: #666;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    transition: color 0.3s;
}
.footer-links a:hover {
    color: #ff3333;
}
.copyright {
    color: #666;
    font-size: 13px;
}