/* 顶部导航栏独立样式，不污染原有页面样式 */
.top-nav-bar {
    width: 100%;
    padding: 0;
    margin-bottom: 12px;
}
.nav-inner {
    /* 电脑端固定1185px宽度，页面居中 */
    width: 1185px;
    margin: 0 auto;
    background: #2c3e50;
    border-radius: 10px;
    padding: 14px 30px;
    display: flex;
    gap: 45px;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    box-sizing: border-box;
}
.nav-btn {
    display: inline-block;
    color: #ffffff;
    text-decoration: none;
    font-size: 18px;
    padding: 8px 18px;
    border-radius: 6px;
    transition: all 0.25s ease;
    letter-spacing: 1px;
}
.nav-btn:hover {
    background: #3498db;
    transform: translateY(-2px);
    box-shadow: 0 3px 8px rgba(52, 152, 219, 0.4);
}
/* 用户头像区域 可点击跳转 */
.user-avatar-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    cursor: pointer;
}
/* 彻底修复头像拉伸裂开 */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    border: 2px solid #fff;
    display: block;
    /* 图片加载失败兜底灰色背景 */
    background:#94a3b8;
}
.user-name-text {
    color: #fff;
    font-size: 16px;
}

/* 平板适配 */
@media (max-width: 1220px) {
    .nav-inner {
        width: calc(100% - 16px);
        gap: 20px;
        padding: 12px 20px;
    }
}
/* 手机端极致优化：留白最小化，和下方按钮/绿色框同宽 */
@media (max-width:768px){
    .nav-inner {
        width: calc(100% - 16px);
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
        padding: 10px 10px;
    }
    .nav-btn {
        font-size: 15px;
        padding: 6px 14px;
        letter-spacing: 0;
    }
    .user-avatar {
        width: 34px;
        height: 34px;
    }
    .user-name-text {
        font-size: 14px;
    }
}