* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

ul, li {
    list-style: none;
}

a {
    text-decoration: none;
    color: #2A2D34;
    transition: all 0.3s ease;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: #FFFFFF;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    height: 70px;
    line-height: 70px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    position: relative;
}

.navbar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: auto;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 70px;
    line-height: 70px;
}

.logo-link i {
    font-size: 22px;
    color: #4A6CF7;
}

.logo-img {
    height: 36px;
    display: block;
}

.navbar-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 22px;
    color: #2A2D34;
    cursor: pointer;
    height: 70px;
    line-height: 70px;
    position: absolute;
    top: 0;
    right: 20px;
    z-index: 60;
    width: 30px;
    height: 30px;
    padding: 0;
    margin-top: 20px;
}

.navbar-toggle:hover {
    color: #4A6CF7;
}

.navbar-toggle i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.navbar-toggle .close-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg);
}

.navbar-toggle.active .open-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg);
}

.navbar-toggle.active .close-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

.navbar-collapse {
    display: block;
    flex: 1;
    margin: 0 30px;
}

.nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 35px;
    height: 70px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    padding: 0 5px;
    height: 100%;
    display: inline-flex;
    align-items: center;
    position: relative;
    border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-list > li.active > a.nav-link {
    color: #4A6CF7;
    border-bottom: 2px solid #4A6CF7;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    background-color: #FFFFFF;
    padding: 10px 0;
    min-width: 160px;
    border: 1px solid #E9ECEF;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-radius: 6px;
    z-index: 100;
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
    transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.dropdown-link {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    line-height: 1.5;
}

.dropdown-link:hover,
.nav-list .dropdown-menu li.active > a.dropdown-link {
    background-color: #F8F9FA;
    color: #4A6CF7;
}

.attr-nav {
    display: flex;
    align-items: center;
    gap: 20px;
    height: 70px;
}

.fabuan {
    display: inline-block;
    padding: 8px 20px;
    background-color: #4A6CF7;
    color: #FFFFFF !important;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
}

.fabuan i {
    margin-right: 8px;
}

.fabuan:hover {
    background-color: rgba(74, 108, 247, 0.9);
    transform: translateY(-2px);
}

.nav-auth-link {
    font-size: 14px;
    font-weight: 500;
    padding: 0 5px;
}

.nav-auth-link i {
    margin-right: 8px;
}

.nav-auth-link:hover {
    color: #4A6CF7;
    transform: translateY(-2px);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 50;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    opacity: 0;
    visibility: hidden;
}

.mobile-menu.active {
    display: block;
    max-height: 600px;
    opacity: 1;
    visibility: visible;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    padding: 15px 20px;
}

.mobile-nav-link, .mobile-dropdown-toggle {
    padding: 8px 12px;
    font-size: 14px;
    font-weight: 500;
    display: block;
    border-radius: 6px;
    margin-bottom: 6px;
    color: #2A2D34;
    background-color: #f8f9fa;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.mobile-nav-link:hover, 
.mobile-dropdown-toggle:hover,
.mobile-nav-list li.active > a.mobile-nav-link,
.mobile-dropdown-menu li.active > a.mobile-dropdown-link {
    color: #4A6CF7;
    background-color: #EFF1F5;
}

.mobile-dropdown-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-dropdown-menu {
    display: none;
    background-color: #f5f6f8;
    border-radius: 4px;
    margin: 4px 0 8px 0;
    padding: 6px 0;
    animation: slideDown 0.3s ease-out;
}

.mobile-dropdown.active .mobile-dropdown-menu {
    display: block;
}

.mobile-dropdown-link {
    padding: 6px 12px 6px 20px;
    font-size: 13px;
    display: block;
    color: #2A2D34;
    line-height: 1.4;
}

.mobile-dropdown-link:hover,
.mobile-dropdown-menu li.active > a.mobile-dropdown-link {
    color: #4A6CF7;
    background-color: #EFF1F5;
}

.mobile-auth-group {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid #e9ecef;
}

.mobile-auth-btn, .mobile-publish-btn {
    flex: 1;
    text-align: center;
    padding: 8px 0;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    line-height: 1.4;
}

.mobile-auth-btn {
    background-color: #f8f9fa;
    color: #2A2D34;
}

.mobile-publish-btn {
    background-color: #4A6CF7;
    color: #FFFFFF !important;
}

.mobile-auth-btn i, .mobile-publish-btn i {
    margin-right: 6px;
    font-size: 12px;
}

.mobile-auth-btn:hover, 
.mobile-publish-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.mobile-auth-btn:hover {
    background-color: #e9ecef;
    color: #4A6CF7;
}

.mobile-publish-btn:hover {
    background-color: #3a5ce5;
}

/* 桌面端有子菜单的active状态 */
.dropdown.active .nav-link {
    color: #4A6CF7;
    border-bottom: 2px solid #4A6CF7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .site-header {
        height: 60px;
        line-height: 60px;
    }

    .nav-container {
        padding: 0 15px;
    }

    .navbar-toggle {
        display: block;
        height: 30px;
        line-height: 30px;
        right: 15px;
        margin-top: 15px;
    }

    .logo-link {
        height: 60px;
        line-height: 60px;
    }

    .logo-img {
        height: 30px;
    }

    .navbar-collapse, .attr-nav {
        display: none;
    }
    
    /* 调整手机版按钮大小 */
    .mobile-auth-btn, .mobile-publish-btn {
        padding: 8px 0;
        font-size: 13px;
    }
    
    .mobile-nav-link, .mobile-dropdown-toggle {
        padding: 8px 12px;
        font-size: 14px;
        margin-bottom: 6px;
        min-height: 40px;
        line-height: 1.4;
    }
    
    .mobile-dropdown-link {
        padding: 6px 12px 6px 20px;
        font-size: 13px;
        line-height: 1.4;
    }
}

@media (max-width: 480px) {
    /* 进一步优化小屏幕按钮 */
    .mobile-auth-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .mobile-auth-btn, .mobile-publish-btn {
        padding: 8px 0;
        font-size: 12px;
        min-height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-nav-list {
        padding: 12px 15px;
    }
    
    .mobile-nav-link, .mobile-dropdown-toggle {
        padding: 7px 10px;
        font-size: 13px;
        margin-bottom: 5px;
        min-height: 38px;
    }
    
    .mobile-dropdown-link {
        padding: 5px 10px 5px 18px;
        font-size: 12px;
    }
    
    .mobile-auth-btn i, .mobile-publish-btn i {
        margin-right: 4px;
        font-size: 11px;
    }
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.navbar {
    padding: 0 !important;
    background-color: #FFFFFF !important;
    height: 100%;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes menuExpand {
    0% {
        max-height: 0;
        opacity: 0;
        transform: translateY(-10px);
    }
    100% {
        max-height: 600px;
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes menuCollapse {
    0% {
        max-height: 600px;
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        max-height: 0;
        opacity: 0;
        transform: translateY(-10px);
    }
}

/* 769px到1048px设备上的导航修复 */
@media (min-width: 769px) and (max-width: 1080px) {
    /* 修复导航容器 */
    .nav-container {
        padding: 0 12px;
    }
    
    /* 修复导航列表 */
    .nav-list {
        gap: 12px; /* 减少导航项之间的间隙 */
        height: 70px;
    }
    
    /* 修复导航链接 */
    .nav-link {
        font-size: 13px; /* 减小字体大小 */
        padding: 0 4px; /* 减少内边距 */
        white-space: nowrap; /* 防止文字换行 */
        display: inline-flex;
        align-items: center;
        height: 100%;
    }
    
    /* 导航文字包装 */
    .nav-text {
        display: inline-block;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 70px; /* 限制最大宽度，防止过长 */
    }
    
    /* 修复下拉菜单箭头 */
    .nav-link i {
        margin-left: 3px;
        font-size: 12px;
    }
    
    /* 修复用户操作区域 */
    .attr-nav {
        gap: 10px;
    }
    
    /* 修复发布按钮 */
    .fabuan {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .fabuan-text {
        display: inline;
    }
    
    /* 修复用户认证链接 */
    .nav-auth-link {
        font-size: 12px;
        padding: 0 4px;
    }
    
    .auth-text {
        display: inline-block;
        white-space: nowrap;
    }
    
    /* 修复下拉菜单 */
    .dropdown-menu {
        min-width: 140px;
        font-size: 13px;
    }
    
    .dropdown-link {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    /* 调整导航栏整体布局 */
    .navbar-collapse {
        margin: 0 15px;
    }
    
    /* 调整LOGO大小 */
    .logo-img {
        height: 32px;
    }
    
    .logo-link i {
        font-size: 20px;
    }
}

/* 进一步优化更窄的平板设备 */
@media (min-width: 769px) and (max-width: 900px) {
    .nav-list {
        gap: 8px;
    }
    
    .nav-link {
        font-size: 12px;
        padding: 0 3px;
    }
    
    .nav-text {
        max-width: 60px;
    }
    
    .attr-nav {
        gap: 6px;
    }
    
    .fabuan {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .nav-auth-link {
        font-size: 11px;
    }
    
    .logo-img {
        height: 30px;
    }
    
    .logo-link i {
        font-size: 18px;
    }
}

/* 针对有较长导航文字的特殊处理 */
@media (min-width: 769px) and (max-width: 1048px) {
    /* 如果导航项文字过长，可以进一步调整 */
    .nav-list > li {
        max-width: 85px; /* 限制每个导航项的最大宽度 */
        overflow: hidden;
    }
    
    /* 确保下拉菜单在有限空间内正确显示 */
    .dropdown {
        position: relative;
    }
    
    .dropdown-menu {
        position: absolute;
        z-index: 1000;
    }
    
    /* 防止导航项被挤压 */
    .nav-list {
        flex-wrap: nowrap; /* 确保不换行 */
        overflow-x: auto; /* 如果内容过多可以横向滚动 */
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        padding-bottom: 4px;
    }
    
    .nav-list::-webkit-scrollbar {
        height: 3px;
    }
    
    .nav-list::-webkit-scrollbar-thumb {
        background-color: rgba(0, 0, 0, 0.2);
        border-radius: 3px;
    }
}

/* 确保在769px以上隐藏移动菜单按钮 */
@media (min-width: 769px) {
    .navbar-toggle {
        display: none !important;
    }
    
    .mobile-menu {
        display: none !important;
    }
}

/* 确保在768px及以下显示移动菜单按钮 */
@media (max-width: 768px) {
    .navbar-collapse, .attr-nav {
        display: none !important;
    }
    
    .navbar-toggle {
        display: block !important;
    }
}