:root {
            --primary-color: #c00;
            --dark-color: #222;
            --light-color: #fff;
            --transition: all 0.3s ease;
            --menu-delay: 0.2s;
			
			--tag-hot: #ff4757;
			--tag-popular: #2ed573;
			--tag-new: #1e90ff;
			--news-bg: #f8f8f8;
            --footer-bg: #121212;
            --footer-text: #aaa;
            --footer-link: #ddd;

            --gray-light: #f8f8f8;
            --gray-medium: #eaeaea;
            --text-dark: #333;
            --text-medium: #666;
            --text-light: #999;
            --border-color: #ddd;
            --news-card-hover: rgba(204,0,0,0.05);
            --tag-bg: #f0f0f0;
            --sidebar-bg: #fff;
            --text-secondary: #666;
			
            --primary-black: #212121; /* 主黑色 */
            --secondary-red: #e53935; /* 次红色 */
            --dark-bg: #2d2d2d; /* 深色背景 */
            --light-bg: #f8f9fa; /* 浅色背景 */
            --gray: #6c757d;
            --border: #e0e0e0;
			
            --shadow: 0 5px 15px rgba(0,0,0,0.1);
			--background-light: #f8f8f8;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: #f8f8f8;
            padding-top: 90px;
        }
       
		a {
		    text-decoration: none;
		    color: inherit;
		    outline: none;
		}
		
		ul, li {
		    list-style: none; 
		    margin: 0;
		    padding: 0;
		}
        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--light-color);
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            height: 90px;
        }
        
        /* Logo Area */
        .logo {
           
            height: 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        .logo-brand {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark-color);
            letter-spacing: -1px;
        }
        
        .logo-brand span {
            color: var(--primary-color);
        }
        
        /* Desktop Navigation */
        .nav-menu {
            display: flex;
            list-style: none;
            height: 100%;
			
        }
        
        .nav-item {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }
        
        .nav-link {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            font-size: 16px;
            padding: 0 22px;
            height: 100%;
            display: flex;
            align-items: center;
            transition: var(--transition);
            position: relative;
			text-transform:uppercase;
        }
        
        .nav-link:hover {
            color: var(--primary-color);
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 22px;
            right: 22px;
            height: 3px;
            background: var(--primary-color);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.3s ease;
        }
        
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        
        /* Dropdown Menus */
        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            width: 220px;
            background: var(--light-color);
            box-shadow: 0 5px 25px rgba(0,0,0,0.1);
            border-top: 3px solid var(--primary-color);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: 
                opacity 0.3s ease var(--menu-delay),
                transform 0.3s ease var(--menu-delay),
                visibility 0.3s ease var(--menu-delay);
            z-index: 100;
            pointer-events: none;
        }
        
        .dropdown-lv3 {
            position: absolute;
            top: 0;
            left: 100%;
            width: 220px;
            background: var(--light-color);
            box-shadow: 0 5px 25px rgba(0,0,0,0.1);
            border-left: 3px solid var(--primary-color);
            opacity: 0;
            visibility: hidden;
            transform: translateX(10px);
            transition: 
                opacity 0.2s ease var(--menu-delay),
                transform 0.2s ease var(--menu-delay),
                visibility 0.2s ease var(--menu-delay);
            pointer-events: none;
        }
        
        .nav-item:hover > .dropdown,
        .dropdown-item:hover > .dropdown-lv3 {
            opacity: 1;
            visibility: visible;
            transform: translate(0);
            pointer-events: all;
        }
        
        .dropdown-item {
            position: relative;
            list-style: none;
        }
        
        .dropdown-link {
            display: block;
            padding: 12px 20px;
            text-decoration: none;
            color: #555;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .dropdown-lv3 .dropdown-link {
            padding: 10px 20px;
            font-size: 14px;
        }
        
        .dropdown-link:hover {
            background: #f8f8f8;
            color: var(--primary-color);
            padding-left: 25px;
        }
        
        .dropdown-arrow {
            font-size: 12px;
            color: #999;
            transition: var(--transition);
        }
        
        .dropdown-link:hover .dropdown-arrow {
            color: var(--primary-color);
        }
        
        /* Mobile Navigation */
        .hamburger {
            display: none;
            cursor: pointer;
            width: 30px;
            height: 25px;
            position: relative;
        }
        
        .hamburger span {
            position: absolute;
            height: 3px;
            width: 100%;
            background: var(--dark-color);
            border-radius: 3px;
            left: 0;
            transition: var(--transition);
        }
        
        .hamburger span:nth-child(1) {
            top: 0;
        }
        
        .hamburger span:nth-child(2) {
            top: 11px;
        }
        
        .hamburger span:nth-child(3) {
            top: 22px;
        }
        
        .hamburger.active span:nth-child(1) {
            top: 11px;
            transform: rotate(45deg);
        }
        
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        
        .hamburger.active span:nth-child(3) {
            top: 11px;
            transform: rotate(-45deg);
        }
        /* 新增功能样式 - 搜索框和多语言切换 */
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-left: 20px;
        }
        
        /* 搜索功能样式 */
        .search-container {
           
            margin-left: 20px;
        }
        
        .search-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: transparent;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .search-toggle:hover {
            background: #f5f5f5;
        }
        
        .search-toggle i {
            font-size: 18px;
            color: #333;
        }
        
        .search-form {
            position: absolute;
            top: 100%;
            right: 0;
            width: 350px;
            background: white;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
            border-radius: 4px;
            padding: 15px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: 
                opacity 0.3s ease,
                transform 0.3s ease,
                visibility 0.3s ease;
            z-index: 150;
        }
        
        .search-form.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .search-input {
            position: relative;
            display: flex;
            align-items: center;
        }
        
        .search-input input {
            width: 100%;
            padding: 10px 15px 10px 40px;
            border: 1px solid #ddd;
            border-radius: 30px;
            font-size: 14px;
            outline: none;
            transition: all 0.3s;
        }
        
        .search-input input:focus {
            border-color: #c00;
            box-shadow: 0 0 0 3px rgba(204,0,0,0.1);
        }
        
        .search-input i {
            position: absolute;
            left: 15px;
            color: #999;
        }
        .search-btn-visible {
            position: absolute;
            right: 25px;
            background: #c00;
            color: white;
            border: none;
            border-radius: 20px;
            padding: 8px 16px;
            font-size: 13px;
            cursor: pointer;
            transition: all 0.3s;
            z-index: 2; /* 确保按钮在输入框上方 */
        }
        
        .search-btn-visible:hover {
            background: #a00;
        }
		
        .moblie-search-close {
            position: absolute;
            top: 10px;
            right: 10px;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: #999;
            font-size: 18px;
        }
        
        .moblie-search-close:hover {
            color: #333;
        }
        
        /* 多语言功能样式 */
        .language-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: transparent;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }
        
        .language-toggle:hover {
            background: #f5f5f5;
        }
        
        .language-toggle i {
            font-size: 18px;
            color: var(--dark-color);
        }
        
        .language-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            width: 180px;
            background: white;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: 
                opacity 0.3s ease,
                transform 0.3s ease,
                visibility 0.3s ease;
            z-index: 150;
        }
        
        .language-dropdown.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .language-item {
            padding: 10px 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .language-item:hover {
            background: #f8f8f8;
            color: var(--primary-color);
        }
        
        .language-item i {
            font-size: 16px;
            color: #777;
        }
        
        .language-item:hover i {
            color: var(--primary-color);
        }

        
        /* Responsive Design */
        @media (max-width: 1024px) {
            .navbar {
                padding: 0 15px;
            }
            
            .nav-link {
                padding: 0 15px;
            }
        }
        
        @media (max-width: 900px) {
            body {
                padding-top: 70px;
            }
            
            .navbar {
                height: 70px;
            }
            
            .logo {
                
                height: 70px;
            }
            
            .logo-brand {
                font-size: 26px;
            }
            
           .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: var(--light-color);
                flex-direction: column;
                transition: var(--transition);
                padding: 20px 0;
                overflow-y: auto;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-item {
                height: auto;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
            }
            
            .nav-link {
                width: 100%;
                padding: 15px 25px;
                height: auto;
                border-bottom: 1px solid #eee;
            }
            
            .nav-link::after {
                display: none;
            }
            
            .dropdown {
                position: static;
                width: 100%;
                box-shadow: none;
                border: none;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            
            .dropdown.active {
                max-height: 1000px;
            }
            
            .dropdown-lv3 {
                position: static;
                width: 100%;
                box-shadow: none;
                border: none;
                max-height: 0;
                overflow: hidden;
                opacity: 1;
                visibility: visible;
                transform: none;
                transition: max-height 0.3s ease;
            }
            
            .dropdown-lv3.active {
                max-height: 1000px;
            }
            
            .dropdown-item {
                padding-left: 30px;
            }
            
            .dropdown-link {
                padding: 12px 20px 12px 35px;
            }
            
            .dropdown-lv3 .dropdown-link {
                padding: 10px 20px 10px 45px;
            }
            
            .hamburger {
                display: block;
            }
            
            .mobile-toggle {
                position: absolute;
                right: 20px;
                top: 50%;
                transform: translateY(-50%);
                font-size: 14px;
                cursor: pointer;
            }
			/* 移动端导航操作区域样式 */
            .nav-actions {
                margin-left: auto;
                margin-right: 15px;
            }
        }
		@media (max-width: 768px) {
			.search-form {
		                width: 300px;
		                padding: 12px;
		            }
			.search-btn-visible {
				padding: 6px 12px;
				font-size: 12px;
			}
			
		}
	/* FOOTER STYLES */
        footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding-top: 60px;
            padding-bottom: 30px;
            position: relative;
        }
        
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .footer-columns {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 60px;
        }
        
        /* Footer about section */
        .footer-about {
            padding-right: 20px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .footer-logo-brand {
            font-size: 30px;
            font-weight: 800;
            color: var(--light-color);
            line-height: 1;
        }
        
        .footer-logo-brand span {
            color: var(--primary-color);
        }
        
        .footer-company-info {
            margin-bottom: 20px;
            font-size: 18px;
            color: var(--light-color);
            font-weight: 600;
            line-height: 1.3;
        }
        
        .contact-list {
            list-style: none;
            margin-bottom: 20px;
        }
        
        .contact-item {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        
        .contact-item i {
            color: var(--primary-color);
            margin-right: 12px;
            font-size: 18px;
            min-width: 24px;
            text-align: center;
        }
        
        .contact-info {
            line-height: 1.5;
        }
        
        .social-title {
            font-size: 16px;
            margin-bottom: 15px;
            font-weight: 600;
            color: var(--light-color);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: var(--light-color);
            font-size: 16px;
            transition: all 0.3s ease;
        }
        
        .social-icon:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }
        
        /* Footer links section */
        .footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        
        .links-title {
            color: var(--light-color);
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .links-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--primary-color);
        }
        
        .footer-menu {
            list-style: none;
        }
        
        .footer-menu li {
            margin-bottom: 15px;
        }
        
        .footer-menu a {
            text-decoration: none;
            color: var(--footer-link);
            font-size: 15px;
            transition: all 0.2s ease;
            position: relative;
            padding-left: 10px;
            display: inline-block;
        }
        
        .footer-menu a::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--primary-color);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .footer-menu a:hover {
            color: var(--light-color);
            padding-left: 15px;
        }
        
        .footer-menu a:hover::before {
            opacity: 1;
        }
        
        /* Preview section */
        .news-preview {
            margin-bottom: 30px;
        }
        
        .preview-title {
            font-size: 15px;
            font-weight: 500;
            margin-bottom: 12px;
            color: var(--light-color);
        }
        
        .foot-news-list {
            list-style: none;
        }
        
        .news-item {
            display: flex;
            margin-bottom: 15px;
        }
        
        .news-date {
            min-width: 70px;
            font-size: 12px;
            color: var(--primary-color);
            font-weight: 600;
        }
        
        .news-link {
            color: var(--footer-link);
            text-decoration: none;
            font-size: 14px;
            line-height: 1.5;
            transition: color 0.2s ease;
        }
        
        .news-link:hover {
            color: var(--light-color);
        }
        
        .tags-title {
            margin-bottom: 15px;
            font-size: 16px;
            color: var(--light-color);
            font-weight: 600;
        }
        
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .tag-link {
            display: inline-block;
            background: rgba(255,255,255,0.08);
            color: var(--footer-link);
            font-size: 13px;
            padding: 6px 15px;
            border-radius: 20px;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        
        .tag-link:hover {
            background: var(--primary-color);
            color: white;
        }
        
        /* Footer bottom */
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 25px;
        }
        
        .footer-links-row {
            display: flex;
            justify-content: center;
            margin-bottom: 15px;
            flex-wrap: wrap;
        }
        
        .footer-link-item {
            margin: 0 12px 8px;
        }
        
        .footer-link {
            color: var(--footer-text);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        .footer-link:hover {
            color: var(--light-color);
        }
        
        .copyright {
            text-align: center;
            font-size: 14px;
            color: #777;
        }
        
        /* Responsive Design */
        @media (max-width: 1024px) {
            .footer-columns {
                gap: 30px;
            }
            
            .footer-links {
                gap: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .footer-columns {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .footer-about {
                padding-right: 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                padding-bottom: 40px;
            }
            
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
        }
        
        @media (max-width: 480px) {
            .footer-links {
                grid-template-columns: 1fr;
            }
            
            .footer-links-row {
                flex-direction: column;
                align-items: center;
            }
            
            .footer-link-item {
                margin: 0 0 12px;
            }
        }
/* back-to-top */
#back-to-top {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 50px;
    height: 50px;
    background-color: red;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
	z-index:1999;
}


#back-to-top .arrow {
    width: 12px;
    height: 12px;
    border-top: 3px solid white;
    border-right: 3px solid white;
    transform: rotate(-45deg);
}


#back-to-top.show {
    opacity: 1;
    visibility: visible;
}


#back-to-top:active {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}


#back-to-top:hover {
    background-color: darkred;
}