/* 全局基础样式 */
        :root {
            --primary-color: #2563EB; /* 主色调-沉稳蓝 */
            --secondary-color: #0D9488; /* 辅助色-青绿色 */
            --dark-color: #1E293B; /* 深色文本 */
            --light-color: #F8FAFC; /* 浅色背景 */
            --gray-color: #94A3B8; /* 灰色文本 */
            --white-color: #FFFFFF; /* 白色 */
            --border-color: #E2E8F0; /* 边框色 */
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
            --shadow-lg: 0 8px 16px rgba(0,0,0,0.1);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Microsoft Yahei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
            color: var(--dark-color);
            line-height: 1.6;
            background-color: var(--light-color);
            scroll-behavior: smooth;
        }

        a {
            text-decoration: none;
            color: var(--dark-color);
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-color);
        }

        /* 通栏广告图样式 */
        .banner-section {
            margin: 30px 0;
        }
        
        .banner-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        
        .banner-card {
            position: relative;
            height: 180px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        
        .banner-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        
        .banner-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .banner-card:hover .banner-img {
            transform: scale(1.05);
        }
        
        .banner-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.6));
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: var(--white-color);
            padding: 20px;
            text-align: center;
        }
        
        .banner-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .banner-desc {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 15px;
        }
        
        .banner-btn {
            background-color: var(--white-color);
            color: var(--primary-color);
            border: none;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        
        .banner-btn:hover {
            background-color: var(--primary-color);
            color: var(--white-color);
        }

        /* 头部样式 */
        .header {
            background-color: var(--white-color);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 999;
            padding: 8px 0;
        }

        .logo {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary-color);
            display: inline-block;
        }

        .logo span {
            color: var(--dark-color);
        }

        /* 导航菜单样式 - 完善下拉菜单 */
        .nav-main {
            display: flex;
            justify-content: flex-end;
            align-items: center;
        }
        
        .nav-item {
            position: relative;
            margin: 0 2px;
        }
        
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            padding: 10px 16px !important;
            border-radius: var(--radius-sm);
            display: inline-block;
            color: var(--dark-color);
        }

        .nav-link.active, .nav-link:hover {
            color: var(--primary-color) !important;
            background-color: rgba(37, 99, 235, 0.05);
        }
        
        /* 下拉菜单样式 - 增强版 */
        .dropdown {
            position: relative;
            display: inline-block;
        }
        
        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: var(--white-color);
            min-width: 200px;
            box-shadow: var(--shadow-md);
            border-radius: var(--radius-md);
            border: none;
            padding: 10px 0;
            margin-top: 5px;
            display: none;
            z-index: 9999;
            opacity: 0;
            transform: translateY(10px);
            transition: all 0.2s ease;
        }
        
        .dropdown:hover .dropdown-menu {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }
        
        .dropdown-item {
            padding: 8px 20px;
            font-size: 14px;
            color: var(--dark-color);
            display: flex;
            align-items: center;
            white-space: nowrap;
        }
        
        .dropdown-item:hover {
            background-color: rgba(37, 99, 235, 0.05);
            color: var(--primary-color);
        }
        
        .dropdown-item i {
            margin-right: 8px;
            font-size: 12px;
            color: var(--gray-color);
        }
        
        .dropdown-toggle::after {
            margin-left: 6px;
            font-size: 10px;
        }

        /* 幻灯片轮播样式 - 4张轮播图 */
        .carousel-section {
            margin: 20px 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        
        .carousel-item {
            height: 400px;
            position: relative;
        }
        
        .carousel-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .carousel-caption {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            bottom: auto;
            right: auto;
            text-align: left;
            max-width: 800px;
            padding: 20px;
            background: rgba(0,0,0,0.5);
            border-radius: var(--radius-md);
        }
        
        .carousel-caption h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .carousel-caption p {
            font-size: 16px;
            margin-bottom: 20px;
            opacity: 0.95;
        }
        
        .carousel-btn {
            background-color: var(--primary-color);
            color: var(--white-color);
            border: none;
            padding: 10px 25px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }
        
        .carousel-btn:hover {
            background-color: #1D4ED8;
            transform: translateY(-2px);
        }
        
        /* 轮播控制按钮样式优化 */
        .carousel-control-prev, .carousel-control-next {
            width: 50px;
            height: 50px;
            background-color: rgba(0,0,0,0.3);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            margin: 0 15px;
        }
        
        .carousel-control-prev-icon, .carousel-control-next-icon {
            width: 20px;
            height: 20px;
        }
        
        /* 轮播指示器样式优化 */
        .carousel-indicators {
            bottom: 20px;
        }
        
        .carousel-indicators button {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin: 0 5px;
            background-color: rgba(255,255,255,0.5);
            border: none;
        }
        
        .carousel-indicators button.active {
            background-color: var(--white-color);
        }

        /* 英雄区样式 */
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
            color: var(--white-color);
            padding: 60px 0;
            border-radius: var(--radius-lg);
            margin-top: 20px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25' viewBox='0 0 1600 800'%3E%3Cg %3E%3Cpath fill='%23ffffff' fill-opacity='0.08' d='M800 800L0 400L1600 0V800Z'%3E%3C/path%3E%3C/g%3E%3C/svg%3E") no-repeat right center;
            background-size: cover;
        }

        .hero-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .hero-desc {
            font-size: 1rem;
            opacity: 0.95;
            margin-bottom: 24px;
        }

        .hero-btn {
            background-color: var(--white-color);
            color: var(--primary-color);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: var(--radius-md);
            border: none;
            transition: var(--transition);
        }

        .hero-btn:hover {
            background-color: var(--light-color);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* 工具区样式 */
        .section-title {
            text-align: center;
            margin-bottom: 36px;
            position: relative;
            padding-bottom: 12px;
        }

        .section-title h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--dark-color);
            display: inline-block;
        }

        .section-title h2 span {
            color: var(--primary-color);
        }

        .section-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 3px;
        }

        /* 工具卡片 - 两行五列布局（仅保留链接） */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 20px;
        }
        
        .tool-card {
            background-color: var(--white-color);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }

        .tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-color);
        }

        .tool-icon {
            font-size: 32px;
            color: var(--primary-color);
            margin-bottom: 12px;
        }

        .tool-name {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark-color);
        }

        .tool-desc {
            font-size: 13px;
            color: var(--gray-color);
            margin-bottom: 16px;
        }

        .tool-btn {
            background-color: rgba(37, 99, 235, 0.08);
            color: var(--primary-color);
            border: none;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 13px;
            transition: var(--transition);
        }

        .tool-btn:hover {
            background-color: var(--primary-color);
            color: var(--white-color);
        }

        /* 内容分类区样式 */
        .category-section {
            padding: 50px 0;
        }

        .category-card {
            background-color: var(--white-color);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }

        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .category-icon {
            font-size: 28px;
            color: var(--secondary-color);
            margin-bottom: 16px;
        }

        .category-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--dark-color);
        }

        .category-list {
            list-style: none;
            padding: 0;
        }

        .category-list li {
            padding: 6px 0;
            border-bottom: 1px dashed var(--border-color);
        }

        .category-list li:last-child {
            border-bottom: none;
        }

        .category-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
        }

        .category-list a:hover {
            color: var(--primary-color);
        }

        .category-more {
            display: inline-block;
            margin-top: 16px;
            color: var(--primary-color);
            font-weight: 500;
            font-size: 14px;
        }

        .category-more i {
            margin-left: 5px;
            transition: var(--transition);
        }

        .category-more:hover i {
            transform: translateX(5px);
        }

        /* 家常菜图文展示样式 */
        .food-card {
            display: flex;
            flex-direction: column;
            height: 100%;
            background-color: var(--white-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        
        .food-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        
        .food-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        
        .food-content {
            padding: 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .food-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark-color);
        }
        
        .food-desc {
            font-size: 13px;
            color: var(--gray-color);
            margin-bottom: 12px;
            flex: 1;
        }
        
        .food-meta {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--gray-color);
        }
        
        /* 底部样式 */
        .footer {
            background-color: var(--dark-color);
            color: #CBD5E1;
            padding: 50px 0 20px;
            margin-top: 40px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--white-color);
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-desc {
            margin-bottom: 16px;
            line-height: 1.7;
            font-size: 14px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--white-color);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary-color);
        }

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

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: #CBD5E1;
            transition: var(--transition);
            font-size: 14px;
        }

        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }

        .copyright {
            text-align: center;
            padding-top: 20px;
            margin-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 13px;
            color: #94A3B8;
        }

        /* 回到顶部按钮 */
        #back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            line-height: 44px;
            text-align: center;
            background-color: var(--primary-color);
            color: var(--white-color);
            border-radius: 50%;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            display: none;
            z-index: 998;
            transition: var(--transition);
        }

        #back-to-top:hover {
            background-color: #1D4ED8;
            transform: translateY(-3px);
        }

        /* 响应式样式 */
        @media (min-width: 992px) {
            .tools-grid {
                grid-template-columns: repeat(5, 1fr);
            }
            
            .banner-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        @media (max-width: 992px) {
            .hero-title {
                font-size: 1.8rem;
            }
            
            .section-title h2 {
                font-size: 1.6rem;
            }
            
            .tool-card {
                padding: 20px 12px;
            }
            
            .banner-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .banner-card {
                height: 150px;
            }
            
            /* 轮播图响应式 */
            .carousel-item {
                height: 300px;
            }
            
            .carousel-caption h3 {
                font-size: 22px;
            }
            
            .carousel-caption p {
                font-size: 14px;
            }
            
            .carousel-btn {
                padding: 8px 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .header {
                padding: 8px 0;
            }
            
            .logo {
                font-size: 22px;
                display: block;
                text-align: center;
                margin-bottom: 12px;
            }
            
            .nav-main {
                justify-content: center !important;
                flex-wrap: wrap;
            }
            
            .nav-link {
                padding: 8px 12px !important;
                font-size: 14px;
            }
            
            .hero-section {
                padding: 40px 20px;
                text-align: center;
            }
            
            .hero-title {
                font-size: 1.6rem;
            }
            
            .category-card {
                margin-bottom: 16px;
            }
            
            /* 移动端工具卡片两行自适应 */
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            #back-to-top {
                width: 40px;
                height: 40px;
                line-height: 40px;
                bottom: 20px;
                right: 20px;
            }
            
            /* 轮播图移动端优化 */
            .carousel-item {
                height: 200px;
            }
            
            .carousel-caption {
                max-width: 90%;
                padding: 15px;
            }
            
            .carousel-caption h3 {
                font-size: 18px;
                margin-bottom: 10px;
            }
            
            .carousel-caption p {
                font-size: 12px;
                margin-bottom: 15px;
            }
        }

        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.4rem;
            }
            
            .section-title h2 {
                font-size: 1.4rem;
            }
            
            .tool-icon {
                font-size: 28px;
            }
            
            .tool-name {
                font-size: 15px;
            }
            
            .footer {
                text-align: center;
            }
            
            .footer-title::after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            .banner-grid {
                grid-template-columns: 1fr;
            }
            
            .banner-card {
                height: 140px;
            }
            
            .banner-title {
                font-size: 18px;
            }
            
            /* 轮播图小屏优化 */
            .carousel-control-prev, .carousel-control-next {
                width: 40px;
                height: 40px;
                margin: 0 5px;
            }
        }