/* ==========================================================================
   护卫神主题响应式修复 - 一劳永逸解决方案
   解决顶部logo/网站名称/联系方式冲突 + 底部菜单布局问题
   ========================================================================== */

/* 基础重置 - 防止冲突 */
* {
    box-sizing: border-box;
}

/* 顶部区域 - 统一深蓝色背景 */
.site-header {
    background: #0A2463; /* 统一深蓝色背景 #0A2463 */
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    min-height: 80px;
    height: auto;
    padding: 15px 0;
}

/* 精密工业导航栏 - 参考原版布局 */
.site-header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 70px !important;
    background: rgba(30, 58, 138, 0.95) !important;
    backdrop-filter: blur(10px) !important;
    z-index: 50 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.site-header .container {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    height: 100% !important;
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 0 1.5rem !important;
}

/* 品牌logo区域 - 左侧 */
.site-branding {
    flex-shrink: 0 !important;
}

.site-branding .brand-logo {
    display: flex !important;
    align-items: center !important;
    text-decoration: none !important;
}

.site-logo-img {
    height: 38px !important; /* 匹配原版LOGO尺寸 */
    width: auto !important;
    max-width: 110px !important; /* 限制最大宽度 */
    object-fit: contain !important;
    filter: brightness(0) invert(1); /* 白色LOGO */
}

.site-title {
    color: white !important;
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    margin: 0 !important;
}

/* 导航菜单 - 中间 */
.main-navigation {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    margin: 0 2rem !important;
}

.nav-menu {
    display: flex !important;
    align-items: center !important;
    gap: 2rem !important;
    margin: 0 !important;
    padding: 0 !important;
    list-style: none !important;
}

.nav-menu a {
    color: white !important;
    text-decoration: none !important;
    font-size: 0.9375rem !important;
    font-weight: 500 !important;
    padding: 0.5rem 0 !important;
    position: relative !important;
    transition: color 0.3s ease !important;
}

.nav-menu a:hover,
.nav-menu a.current {
    color: #F39C12 !important;
}

/* 彻底移除PC端菜单横线效果 */
.nav-menu a,
.nav-menu li,
.nav-menu a:hover,
.nav-menu a.current,
.nav-menu a:focus,
.nav-menu a:active {
    border: none !important;
    border-bottom: none !important;
    box-shadow: none !important;
    text-decoration: none !important;
    outline: none !important;
}

.nav-menu a::after,
.nav-menu a::before,
.nav-menu li::after,
.nav-menu li::before,
.nav-menu a:hover::after,
.nav-menu a:hover::before,
.nav-menu a.current::after,
.nav-menu a.current::before {
    display: none !important;
    content: none !important;
    height: 0 !important;
    width: 0 !important;
    background: none !important;
    border: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    position: static !important;
}

/* 强制覆盖所有可能的横线效果 */
.nav-menu a {
    background: transparent !important;
    border-bottom: 0 none transparent !important;
    text-shadow: none !important;
    box-shadow: none !important;
}

/* 精准移除PC端导航栏顶部横线 */
.main-navigation {
    border-top: none !important;
}

/* 精准移除站点头部底部横线 */
.site-header {
    border-bottom: none !important;
    box-shadow: none !important;
}

.site-header .container {
    border-bottom: none !important;
}

/* 强制统一所有页面页脚为蓝色 */
.site-footer {
    background-color: var(--primary-color) !important;
    background: var(--primary-color) !important;
}

/* 商业化极简展示 - 产品&案例优化 */
/* 移除所有文字描述和按钮，只保留标题和图片 */
.product-item .product-excerpt,
.case-item .case-excerpt,
.product-card .card-desc,
.case-card .card-desc,
.product-item .product-button-wrapper,
.case-item .case-button-wrapper,
.product-card .card-button,
.case-card .card-button,
.product-button-wrapper,
.case-button-wrapper {
    display: none !important;
}

/* 产品详情页导航链接样式 - 现代化按钮 */
.post-navigation {
    margin: 60px 0 40px;
    padding: 0;
}

.post-navigation .nav-links {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    align-items: stretch;
}

.post-navigation .nav-previous,
.post-navigation .nav-next {
    flex: 1;
}

.post-navigation a {
    display: block;
    padding: 20px 25px;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white !important;
    text-decoration: none !important;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(30, 58, 138, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.post-navigation a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 58, 138, 0.3);
    background: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 100%);
}

.post-navigation .meta-nav {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-navigation .nav-title {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
}

.post-navigation .nav-previous a {
    text-align: left;
}

.post-navigation .nav-next a {
    text-align: right;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .post-navigation .nav-links {
        flex-direction: column;
        gap: 20px;
    }
    
    .post-navigation a {
        padding: 18px 20px;
        font-size: 14px;
    }
    
    .post-navigation .nav-previous a,
    .post-navigation .nav-next a {
        text-align: center;
    }
}



/* 额外确保所有查看详情按钮被隐藏 */
.btn-primary,
.btn-secondary,
.more-link {
    display: none !important;
}

/* 放大图片尺寸 */
.product-image,
.case-image,
.card-img {
    height: 280px !important;
    min-height: 280px !important;
}

@media (max-width: 768px) {
    .product-image,
    .case-image,
    .card-img {
        height: 220px !important;
        min-height: 220px !important;
    }
}

/* 优化标题样式 */
.product-title,
.case-title,
.card-title {
    font-size: 1.4rem !important;
    font-weight: 600 !important;
    margin-bottom: 0 !important;
    padding: 20px 15px !important;
    text-align: center !important;
    background: rgba(0,0,0,0.02) !important;
}

/* 卡片悬停效果 */
.product-item,
.case-item,
.product-card,
.case-card {
    transition: all 0.3s ease !important;
    border-radius: 12px !important;
    overflow: hidden !important;
}

.product-item:hover,
.case-item:hover,
.product-card:hover,
.case-card:hover {
    transform: translateY(-8px) !important;
    box-shadow: 0 15px 30px rgba(0,0,0,0.15) !important;
}

/* 移除卡片内边距 */
.product-content,
.case-content,
.card-content {
    padding: 0 !important;
}

/* 优化网格间距 */
.products-grid,
.cases-grid {
    gap: 40px 30px !important;
}

@media (max-width: 768px) {
    .products-grid,
    .cases-grid {
        gap: 30px 20px !important;
    }
}

/* 重置 - 移除所有修复样式，回到原始状态 */

/* 针对顽固浏览器的终极解决方案 */
.nav-menu a[style*="border"],
.nav-menu li[style*="border"],
.nav-menu a[style*="text-decoration"] {
    border: none !important;
    text-decoration: none !important;
}

/* 强制移除所有可能的下划线效果 */
.nav-menu a,
.nav-menu li {
    text-underline-offset: 0 !important;
    text-decoration-thickness: 0 !important;
    text-decoration-line: none !important;
    text-decoration-color: transparent !important;
    text-decoration-style: none !important;
}

/* 联系邮箱按钮 - 右侧 */
.contact-email {
    flex-shrink: 0 !important;
}

.btn-email {
    display: inline-flex !important;
    align-items: center !important;
    gap: 5px !important;
    background: #E67E22 !important;
    color: white !important;
    padding: 0.4rem 0.8rem !important;
    border-radius: 0.375rem !important;
    text-decoration: none !important;
    font-size: 0.8rem !important;
    font-weight: 500 !important;
    transition: all 0.3s ease !important;
    white-space: nowrap !important;
}

.btn-email:hover {
    background: #F39C12 !important;
    box-shadow: 0 4px 12px rgba(230, 126, 34, 0.3) !important;
    transform: translateY(-1px) !important;
}

.btn-email .fas {
    font-size: 0.8rem !important;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
    gap: 20px;
    flex-wrap: wrap;
}

/* 站点品牌 */
.site-branding {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 0;
}

.site-logo {
    flex-shrink: 0;
    max-width: 120px;
    height: auto;
}

.site-logo img {
    max-width: 100%;
    height: auto;
    display: block;
    filter: brightness(0) invert(1); /* 白色logo */
}

.site-info {
    color: #ffffff;
}

.site-title {
    font-size: 22px;
    font-weight: bold;
    color: #ffffff !important;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-decoration: none;
}

.site-title:hover {
    color: #ffffff !important;
    text-decoration: none;
}

.site-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin: 2px 0 0 0;
}

/* 联系信息 - 深蓝色主题 */
.contact-info {
    flex-shrink: 0;
    margin-left: auto;
}

.contact-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    white-space: nowrap;
    padding: 8px 15px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 25px;
    transition: background 0.3s ease;
}

.contact-phone:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.25);
    text-decoration: none;
}

.contact-phone i {
    font-size: 16px;
    color: #ffffff;
}



/* 导航菜单 - 弹性布局 */
.main-navigation {
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}

.nav-menu a {
    color: #333;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #007cba;
}

/* 移动端菜单按钮 - 深蓝色背景 */
.menu-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 4px;
    padding: 12px 15px;
    cursor: pointer;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    display: none !important; /* 默认隐藏 */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #ffffff;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.menu-toggle.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-6px, 6px);
}

.menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-6px, -6px);
}

/* ==========================================================================
   底部区域 - 修复菜单布局问题
   ========================================================================== */

.site-footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: auto;
}

.site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-widget {
    min-width: 0; /* 防止溢出 */
}

.footer-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
}

/* 首页hero区域按钮样式修复 */
.hero .hero-buttons {
    display: flex !important;
    justify-content: center !important;
    gap: 20px !important;
    flex-wrap: wrap !important;
    margin-top: 30px !important;
}

/* 底部菜单间距调整 - 让菜单项更紧凑 */
.footer-links li {
    margin-bottom: 2px !important;  /* 原来是10px，改为2px */
    line-height: 1.2 !important;  /* 减少行高 */
}

.footer-links a {
    padding: 1px 0 !important;  /* 最小间距 */
    display: inline-block !important;
    line-height: 1.1 !important;  /* 紧凑行高 */
}

.footer-widget .footer-links {
    margin-top: 5px !important;  /* 减少标题与菜单的间距 */
}

.hero .btn {
    display: inline-block !important;
    padding: 12px 30px !important;
    border-radius: 30px !important;
    text-decoration: none !important;
    font-weight: bold !important;
    transition: all 0.3s ease !important;
    border: none !important;
    cursor: pointer !important;
    font-size: 16px !important;
    text-align: center !important;
}

.hero .btn-primary {
    background-color: var(--secondary-color) !important;
    color: white !important;
}

.hero .btn-primary:hover {
    background-color: #e67e22 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2) !important;
    color: white !important;
    text-decoration: none !important;
}

.hero .btn-secondary {
    background-color: transparent !important;
    color: white !important;
    border: 2px solid white !important;
}

.hero .btn-secondary:hover {
    background-color: white !important;
    color: var(--primary-color) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2) !important;
    text-decoration: none !important;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .hero .hero-buttons {
        flex-direction: column !important;
        align-items: center !important;
    }
    
    .hero .btn {
        width: 100% !important;
        max-width: 280px !important;
        margin: 5px 0 !important;
    }
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

/* ==========================================================================
   响应式设计 - 断点系统
   ========================================================================== */

/* 大屏幕 (1200px+) */
@media (min-width: 1200px) {
    .site-header .container {
        padding: 0 30px;
    }
}

/* 中等屏幕 (768px - 1199px) */
@media (max-width: 1199px) and (min-width: 769px) {
    .site-header .container {
        padding: 0 20px;
    }
    
    .site-branding {
        max-width: 50%;
    }
    
    .nav-menu {
        gap: 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

/* 平板 (768px - 1024px) */
@media (max-width: 1024px) {
    .site-header .container {
        flex-wrap: wrap;
        padding: 15px;
    }
    
    .site-branding {
        max-width: 70%;
    }
    
    .site-logo img {
        max-height: 45px;
    }
    
    .site-title {
        font-size: 16px;
    }
    
    .contact-info {
        margin-left: 15px;
    }
    
    .contact-phone {
        font-size: 14px;
    }
}

/* 手机 (767px及以下) */
@media (max-width: 767px) {
    .site-header {
        position: sticky;
        top: 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .site-header .container {
        flex-wrap: nowrap;
        padding: 10px 15px;
        min-height: 60px;
    }
    
    .site-branding {
        max-width: calc(100% - 80px); /* 为菜单按钮留出空间 */
    }
    
    .site-logo {
        margin-right: 10px;
    }
    
    .site-logo img {
        max-height: 40px;
    }
    
    .site-title {
        font-size: 14px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    /* 隐藏桌面元素 */
    .desktop-only,
    .desktop-nav {
        display: none !important;
    }
    
    .menu-toggle {
        display: block;
    }
    
    /* 联系信息移动端样式 */
    .contact-info {
        display: none;
    }
    
    /* 底部菜单修复 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-widget {
        width: 100%;
    }
    
    .footer-links {
        display: block;
    }
    
    .footer-links li {
        display: block;
        margin-bottom: 10px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
    /* 隐藏桌面端元素 */
    .main-navigation,
    .quote-button {
        display: none !important;
    }
    
    /* 移动端菜单按钮 */
    .menu-toggle {
        display: flex !important;
        background: none !important;
        border: none !important;
        color: white !important;
        font-size: 1.5rem !important;
        cursor: pointer !important;
        padding: 0.5rem !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    /* 隐藏桌面导航和按钮 */
    .main-navigation,
    .quote-button {
        display: none !important;
    }
    
    /* 移动端菜单 */
    .mobile-menu {
        position: fixed !important;
        top: 70px !important;
        left: 0 !important;
        right: 0 !important;
        background: #1E3A8A !important;
        border-top: 1px solid #1E40AF !important;
        z-index: 40 !important;
        transform: translateY(-100%) !important;
        transition: transform 0.3s ease !important;
    }
    
    .mobile-menu.active {
        transform: translateY(0) !important;
    }
    
    .mobile-menu .nav-menu {
        display: flex !important;
        flex-direction: column !important;
        gap: 0 !important;
        padding: 1rem !important;
    }
    
    .mobile-menu .nav-menu li {
        width: 100% !important;
    }
    
    .mobile-menu .nav-menu a {
        display: block !important;
        color: white !important;
        padding: 0.75rem 1rem !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
        transition: color 0.3s ease !important;
    }
    
    .mobile-menu .nav-menu a:hover,
    .mobile-menu .nav-menu .current-menu-item a {
        color: #F39C12 !important;
    }
    
    /* 移动端邮箱按钮 */
    .mobile-email-btn {
        display: inline-flex !important;
        align-items: center !important;
        gap: 5px !important;
        background: #E67E22 !important;
        color: white !important;
        padding: 0.4rem 0.8rem !important;
        border-radius: 0.375rem !important;
        text-decoration: none !important;
        font-size: 0.8rem !important;
        font-weight: 500 !important;
        transition: all 0.3s ease !important;
        white-space: nowrap !important;
        margin-top: 10px !important;
    }
    
    .mobile-email-btn:hover {
        background: #F39C12 !important;
        box-shadow: 0 4px 12px rgba(230, 126, 34, 0.3) !important;
        transform: translateY(-1px) !important;
    }

    .mobile-email-btn .fas {
        font-size: 0.8rem !important;
    }
}

/* 超小屏幕 (480px及以下) */
@media (max-width: 480px) {
    .site-header .container {
        padding: 8px 12px;
        min-height: 50px;
    }
    
    .site-logo img {
        max-height: 35px;
    }
    
    .site-title {
        font-size: 13px;
    }
    
    .footer-content {
        gap: 20px;
    }
    
    .footer-title {
        font-size: 16px;
    }
}

/* 修复底部菜单被干成一行的问题 */
.footer-links ul {
    display: block !important;
    width: 100% !important;
}

.footer-links li {
    display: block !important;
    width: 100% !important;
    margin-bottom: 8px !important;
}

/* 移动端菜单样式修复 */
.mobile-menu {
    display: none !important;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    overflow-y: auto;
}

/* 移动端隐藏不必要的底部链接 */
@media (max-width: 768px) {
    .footer-bottom .footer-links {
        display: none !important;
    }
    
    /* 隐藏快速导航、联系我们等重复菜单 */
    .footer-content .footer-widget:nth-child(2),
    .footer-content .footer-widget:nth-child(3) {
        display: none !important;
    }
    
    .footer-bottom {
        text-align: center;
        padding: 15px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.2);
        margin-top: 15px;
    }
    
    .footer-copyright {
        margin-bottom: 0;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.8);
    }
    
    /* 移动端菜单按钮显示 */
    .menu-toggle {
        display: flex !important;
    }
    
    /* 移动端隐藏PC菜单 */
    .main-navigation {
        display: none !important;
    }
    
    /* 移动端保持原有联系按钮显示 */
    
    /* 移动端底部整体优化 */
    .site-footer {
        padding: 20px 0 15px;
        border-top: 0.2px solid #e0e0e0;
        margin-top: 15px;
    }
    
/* PC端响应式微调 */
@media (min-width: 769px) {
    /* 大屏幕优化 */
    @media (min-width: 1200px) {
        .site-header .container {
            padding: 0 2rem !important;
        }
        
        .nav-menu {
            gap: 2rem !important;
        }
    }
    
    /* 中等屏幕调整 */
    @media (max-width: 1199px) {
        .site-header .container {
            padding: 0 1.25rem !important;
        }
        
        .nav-menu {
            gap: 1.25rem !important;
        }
        
        .main-navigation {
            margin: 0 1.5rem !important;
        }
    }
    
    /* 小屏幕PC调整 */
    @media (max-width: 992px) {
        .site-header .container {
            padding: 0 1rem !important;
        }
        
        .nav-menu {
            gap: 1rem !important;
        }
        
        .nav-menu a {
            font-size: 0.875rem !important;
        }
        
        .contact-email .btn-email {
            font-size: 0.8125rem !important;
            padding: 0.35rem 0.75rem !important;
        }
        
        .site-logo-img {
            height: 32px !important;
            max-width: 90px !important;
        }
    }
}
    
    .footer-content {
        margin-bottom: 15px;
        text-align: center;
    }
    
    .footer-widget {
        margin-bottom: 15px;
    }
    
    .footer-widget:last-child {
        margin-bottom: 0;
    }
    
    /* 只保留品牌信息 */
    .footer-content .footer-widget:first-child {
        margin-bottom: 0;
    }
    
    /* 移动端底部品牌居中 */
    .footer-content .footer-widget:first-child {
        text-align: center;
        margin: 0 auto;
        max-width: 300px;
    }
    
    .footer-content .footer-widget:first-child .footer-title {
        font-size: 18px;
        margin-bottom: 10px;
    }
    
    .footer-content .footer-widget:first-child .footer-text {
        font-size: 14px;
        line-height: 1.5;
    }
    
    /* 移动端社交媒体图标居中 */
    .footer-content .footer-widget:first-child .social-links {
        justify-content: center;
        margin-top: 15px;
    }
}

.mobile-menu.active {
    display: block !important;
}

.mobile-navigation {
    padding: 60px 20px 20px;
}

.mobile-navigation .nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    flex-direction: column;
}

.mobile-navigation .nav-menu li {
    margin: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-navigation .nav-menu a {
    display: block;
    padding: 15px 0;
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
}

/* 防止布局溢出 */
body {
    overflow-x: hidden;
    margin: 0;
}

img {
    max-width: 100%;
    height: auto;
}

/* 清除浮动 */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}