:root {
        --nav_color_bg:#c00d23;
        --nav_color_current:#000000;
        --nav_color_text:#ffffff;
        --nav_color_text2:#ffffff;
        --bar_color_bg:#000000;
        --bar_color_current:#c00d23;
        --bar_color_text:#fff;
        --bar_color_text2:#fff;
        --bar_color_line:#292929;
        --mobile_nav_bg:#ffffff;
        --mobile_nav_text:#000000;
    }

        /* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary-color: #1a6be0;
            --secondary-color: #0d4ba0;
            --accent-color: #00c853;
            --dark-bg: #0a1930;
            --light-bg: #f5f9ff;
            --text-dark: #333;
            --text-light: #fff;
            --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --card-hover-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .section {
            padding: 100px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark-bg);
        }
        
        .section-title p {
            font-size: 18px;
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .title-line {
            height: 4px;
            width: 80px;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            margin: 20px auto;
            border-radius: 2px;
        }
        
        /* 左侧导航栏样式 - 修改为化工领域页面样式 */
        .side-nav {
            position: fixed;
            left: 30px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 15px;
            padding: 20px 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            display: flex;
            flex-direction: column;
            gap: 15px;
            transition: left 0.3s;
            width: auto;
        }
        
        .side-nav a {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: var(--dark-bg);
            font-weight: 500;
            transition: all 0.3s;
            padding: 10px 15px;
            border-radius: 8px;
            position: relative;
        }
        
        .side-nav a:hover, .side-nav a.active {
            background: var(--primary-color);
            color: white;
            transform: translateX(5px);
        }
        
        .side-nav a i {
            margin-right: 10px;
            font-size: 18px;
        }
        
        .menu-toggle {
            display: none;
            position: fixed;
            top: 20px;
            left: 20px;
            z-index: 1100;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }
        
        /* 英雄区域 - 添加背景图 */
        .hero {
            background: linear-gradient(rgba(10, 25, 48, 0.85), rgba(10, 25, 48, 0.9)), 
                        url('https://images.unsplash.com/photo-1611264766174-1065d9580511?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: var(--text-light);
            padding: 180px 0 120px;
            position: relative;
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        
        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.9;
            line-height: 1.6;
        }
        
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 15px 35px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            font-size: 16px;
        }
        
        .btn-primary {
            background: var(--accent-color);
            color: var(--text-light);
            box-shadow: 0 5px 15px rgba(0, 200, 83, 0.3);
        }
        
        .btn-primary:hover {
            background: #00b347;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 200, 83, 0.4);
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--text-light);
            border: 2px solid var(--text-light);
        }
        
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        
        /* 粒子效果 - 从上飘落并在底部堆积 */
        .hero-particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            overflow: hidden;
        }
        
        .particle {
            position: absolute;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            animation: fall linear infinite;
        }
        
        @keyframes fall {
            0% {
                transform: translateY(-50px) translateX(0);
                opacity: 1;
            }
            70% {
                opacity: 0.8;
            }
            100% {
                transform: translateY(calc(100vh - 50px)) translateX(0);
                opacity: 0;
            }
        }
        
        /* 应用范围 */
        .applications {
            background: var(--light-bg);
        }
        
        .app-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .app-card {
            background: #fff;
            border-radius: 15px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: var(--card-shadow);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .app-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--card-hover-shadow);
        }
        
        .app-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
        }
        
        .app-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 32px;
            color: #fff;
        }
        
        .app-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: var(--dark-bg);
        }
        
        .app-card p {
            color: #666;
            line-height: 1.6;
        }
        
        /* 技术优势 - PC端一排展示 */
        .advantages {
            background: linear-gradient(rgba(10, 25, 48, 0.85), rgba(10, 25, 48, 0.9)), 
                        url('https://images.unsplash.com/photo-1629654297296-cdbfec2e6762?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: var(--text-light);
            position: relative;
            overflow: hidden;
        }
        
        .advantages::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 107, 224, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }
        
        .advantages .container {
            position: relative;
            z-index: 1;
        }
        
        .advantages .section-title h2,
        .advantages .section-title p {
            color: var(--text-light);
        }
        
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .adv-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 40px 30px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        
        .adv-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
        }
        
        .adv-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(26, 107, 224, 0.1), rgba(0, 200, 83, 0.05));
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: -1;
        }
        
        .adv-card:hover::before {
            opacity: 1;
        }
        
        .adv-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 28px;
            color: #fff;
        }
        
        .adv-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
        }
        
        .adv-card p {
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.6;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .app-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            .section-title h2 {
                font-size: 2.4rem;
            }
            
            .app-content {
                flex-direction: column;
            }
            
            .app-image {
                margin-top: 30px;
            }
            
            .side-nav {
                left: 20px;
                padding: 15px 10px;
            }
            
            .side-nav a span {
                display: none;
            }
            
            .side-nav a i {
                margin-right: 0;
                font-size: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .section {
                padding: 80px 0;
            }
            
            .section-title h2 {
                font-size: 32px;
            }
            
            .hero h1 {
                font-size: 40px;
            }
            
            .hero p {
                font-size: 18px;
            }
            
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                text-align: center;
            }
            
            /* 移动端隐藏左侧导航及菜单按钮 */
            .side-nav, .menu-toggle {
                display: none !important;
            }
            
            .advantages {
                background-attachment: scroll;
            }
        }
        
        @media (max-width: 576px) {
            .app-grid, .adv-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            
            .app-card, .adv-card {
                padding: 25px 20px;
            }
            
            .app-icon {
                width: 60px;
                height: 60px;
                font-size: 24px;
                margin-bottom: 20px;
            }
            
            .app-card h3 {
                font-size: 18px;
            }
            
            .adv-icon {
                width: 60px;
                height: 60px;
                font-size: 24px;
                margin-bottom: 20px;
            }
            
            .adv-card h3 {
                font-size: 20px;
            }
        }