/* 头部导航样式 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px var(--shadow-color);
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    width: 60%;
    display: flex;
    gap: 20px;
    font-size: 16px;
    font-weight: 500;
}

.nav-menu a {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s;
}

.nav-menu a:hover {
    color: var(--secondary-color) !important;
}

.login-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 12px;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-menu:hover {
    background-color: var(--bg-color) !important;
}
.login-menu a:hover {
    color: var(--secondary-color) !important;
}

/* 用户信息区域样式 */
.user-info {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 120px;
}

.user-info:hover {
    background-color: var(--bg-color) !important;
}

.user-info .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.user-info .avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info .nickname {
    font-size: 15px;
    color: var(--text-color) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

/* 下拉菜单样式 */
.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 120px;
    background-color: var(--card-bg) !important;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color) !important;
}

.user-info:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s;
}

.dropdown-menu a:hover {
    background-color: var(--bg-color) !important;
    color: var(--primary-color) !important;
}

.dropdown-menu a i {
    font-size: 16px;
    opacity: 0.8;
}