* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
           /* background: linear-gradient(rgba(255, 255, 255, 0.85), rgba(245, 248, 250, 0.95)), 
                        url('https://images.unsplash.com/photo-1563014959-7aaa83350992?q=80&w=2070&auto=format&fit=crop') no-repeat center center fixed;*/
            background-size: cover;
            color: #333;
            padding: 20px;
            min-height: 100vh;
        }
        body::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/static/index/picture/wllkbj.jpeg') center/cover no-repeat;
            opacity: 0.15;
            z-index: -1;
            background-size: cover;  /* 新增属性 */
            background-repeat: no-repeat;  /* 新增属性 */
        }
        
        
        .cold-chain-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 30px;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 40px;
            position: relative;
            padding-bottom: 20px;
        }
        
        .section-title h1 {
            font-size: 3rem;
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #0066cc, #0099ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 150px;
            height: 4px;
            background: linear-gradient(to right, #0066cc, #0099ff);
            border-radius: 2px;
        }
        
        .section-title p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
            color: #555;
            line-height: 1.6;
        }
        
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-top: 40px;
        }
        
        .process-card {
            background: rgba(255, 255, 255, 0.85);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            /*backdrop-filter: blur(5px);*/
            border: 1px solid rgba(0, 102, 204, 0.15);
            position: relative;
        }
        
        .process-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
            background: rgba(255, 255, 255, 0.95);
        }
        
        .step-number {
            position: absolute;
            top: 15px;
            left: 15px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #0066cc, #0099ff);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
            color: white;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            z-index: 2;
        }
        
        .card-header {
            padding: 20px 20px 20px 65px;
            background: rgba(0, 102, 204, 0.05);
            border-bottom: 1px solid rgba(0, 102, 204, 0.1);
            min-height: 110px;
        }
        
        .card-header h2 {
            font-size: 1.3rem;
            margin-bottom: 8px;
            color: #0066cc;
        }
        
        .temperature-range {
            display: inline-block;
            background: rgba(0, 102, 204, 0.1);
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: bold;
            color: #e67300;
            font-size: 1.1rem;
            margin-bottom: 10px;
            border: 1px solid rgba(230, 115, 0, 0.2);
        }
        
        .card-content {
            padding: 25px;
        }
        
        .card-content h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #0066cc;
            border-bottom: 1px solid rgba(0, 102, 204, 0.1);
            padding-bottom: 10px;
        }
        
        .card-content ul {
            list-style-type: none;
            padding-left: 20px;
        }
        
        .card-content li {
            margin-bottom: 15px;
            position: relative;
            padding-left: 25px;
            line-height: 1.6;
            color: #444;
        }
        
        .card-content li::before {
            content: '❄️';
            position: absolute;
            left: 0;
            top: 2px;
            font-size: 16px;
        }
        
        .special-item {
            background: rgba(0, 102, 204, 0.05);
            padding: 15px;
            border-radius: 10px;
            margin-top: 15px;
            border-left: 3px solid #0066cc;
        }
        
        .special-item h4 {
            color: #0099ff;
            margin-bottom: 8px;
        }
        
        .temperature-visualization {
            grid-column: 1 / -1;
            background: rgba(255, 255, 255, 0.85);
            border-radius: 15px;
            padding: 30px;
            margin-top: 20px;
            border: 1px solid rgba(0, 102, 204, 0.15);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }
        
        .temperature-visualization h2 {
            font-size: 2rem;
            margin-bottom: 25px;
            color: #0066cc;
            text-align: center;
            padding-bottom: 15px;
            border-bottom: 2px solid rgba(0, 102, 204, 0.1);
        }
        
        .visualization-container {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
        }
        
        .transport-visual {
            flex: 1;
            min-width: 350px;
            background: rgba(255, 255, 255, 0.95);
            padding: 25px;
            border-radius: 12px;
            position: relative;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 102, 204, 0.1);
        }
        
        .transport-visual h3 {
            color: #0066cc;
            font-size: 1.5rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
        }
        
        .transport-visual h3::before {
            margin-right: 10px;
            font-size: 1.2rem;
        }
        
        .air-transport h3::before {
            content: '✈️';
        }
        
        .sea-transport h3::before {
            content: '🚢';
        }
        
        .temp-scale {
            height: 25px;
            background: linear-gradient(90deg, #004e92, #0080b3, #00b3d4, #00e0e6, #a8ff78, #ffd700, #ff8c00, #ff0000);
            border-radius: 12px;
            margin: 20px 0;
            position: relative;
        }
        
        .temp-markers {
            display: flex;
            justify-content: space-between;
            margin-top: 5px;
            font-size: 0.9rem;
            color: #666;
        }
        
        .temp-bar {
            height: 60px;
            background: rgba(0, 102, 204, 0.05);
            border-radius: 8px;
            margin: 15px 0;
            padding: 10px;
            position: relative;
        }
        
        .temp-bar::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            background: rgba(0, 153, 255, 0.25);
            border-radius: 8px;
        }
        
        .temp-label {
            position: relative;
            z-index: 2;
            font-weight: bold;
            display: flex;
            justify-content: space-between;
            color: #333;
        }
        
        .temp-value {
            color: #e67300;
        }
        
        /* Temperature bar positions based on temperature ranges */
        .pharmaceuticals::before { width: 40%; left: 30%; }
        .vaccines::before { width: 10%; left: 40%; }
        .berries::before { width: 8%; left: 42%; }
        .ice-cream::before { width: 5%; left: 5%; }
        .tuna::before { width: 5%; left: 0%; }
        .salmon::before { width: 5%; left: 10%; }
        .bananas::before { width: 8%; left: 62%; }
        .cheese::before { width: 10%; left: 40%; }
        .wine::before { width: 8%; left: 50%; }
        
        @media (max-width: 1200px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .section-title h1 {
                font-size: 2.2rem;
            }
            
            .section-title p {
                font-size: 1rem;
            }
            
            .process-grid {
                grid-template-columns: 1fr;
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }
            
            .visualization-container {
                flex-direction: column;
            }
        }
        
        @media (max-width: 480px) {
            .cold-chain-container {
                padding: 15px;
            }
            
            .card-header h2 {
                font-size: 1.5rem;
            }
            
            .temperature-range {
                font-size: 0.9rem;
            }
            
            .card-content {
                padding: 15px;
            }
            
            .step-number {
                width: 35px;
                height: 35px;
                font-size: 1rem;
            }
        }