* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
        }
        
        .size-guide-container {
            max-width: 100%;
            background: white;
            overflow: hidden;
            box-shadow: 0 15px 50px rgba(0,0,0,0.08);
        }
        
        .size-guide-header {
            background: linear-gradient(to right, #1a1a1a, #2c2c2c);
            color: white;
            padding: 50px 40px;
            text-align: center;
            border-bottom: 4px solid #000;
        }
        
        .size-guide-title {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 15px;
        }
        
        .size-guide-subtitle {
            font-size: 20px;
            opacity: 0.85;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.7;
        }
        
        .size-content {
            padding: 50px 40px;
            background: #f8f9fa;
        }
        
        .section-title {
            font-size: 36px;
            font-weight: 800;
            color: #000;
            margin-bottom: 30px;
            text-align: center;
            position: relative;
            padding-bottom: 20px;
            letter-spacing: 0.5px;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: #000;
            border-radius: 2px;
        }
        
        .section-subtitle {
            text-align: center;
            color: #555;
            font-size: 19px;
            max-width: 900px;
            margin: 0 auto 50px;
            line-height: 1.8;
        }
        
        .size-chart-container {
            overflow-x: auto;
            margin-bottom: 60px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.08);
            border-radius: 12px;
            background: white;
        }
        
        .size-chart {
            width: 100%;
            border-collapse: collapse;
            min-width: 800px;
        }
        
        .size-chart th {
            background: #000;
            color: white;
            font-weight: 600;
            padding: 18px 15px;
            text-align: center;
            font-size: 18px;
        }
        
        .size-chart td {
            padding: 16px 15px;
            text-align: center;
            border-bottom: 1px solid #eee;
            font-size: 17px;
        }
        
        .size-chart tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        .size-chart tr:hover {
            background-color: #f1f1f1;
        }
        
        .size-chart .size-label {
            font-weight: 700;
            color: #000;
            background: #f5f5f5;
        }
        
        .size-tips {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: 50px auto 0;
        }
        
        .tip-card {
            background: white;
            border-radius: 12px;
            padding: 35px 30px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.08);
            border: 1px solid #eee;
            transition: all 0.4s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        
        .tip-card:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: #000;
        }
        
        .tip-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        
        .card-title {
            font-size: 24px;
            font-weight: 700;
            color: #000;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .card-title i {
            color: #000;
            font-size: 24px;
            min-width: 36px;
            text-align: center;
        }
        
        .tip-card ul {
            list-style: none;
            padding-left: 0;
        }
        
        .tip-card li {
            margin-bottom: 16px;
            padding-left: 32px;
            position: relative;
            font-size: 17px;
            color: #444;
            line-height: 1.7;
        }
        
        .tip-card li:before {
            content: "•";
            color: #000;
            position: absolute;
            left: 12px;
            font-size: 26px;
            top: -5px;
        }
        
        .measurement-guide {
            background: white;
            border-radius: 12px;
            padding: 40px;
            margin-top: 50px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.08);
        }
        
        .measurement-images {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 30px;
        }
        
        .measurement-item {
            text-align: center;
            flex: 1;
            min-width: 250px;
        }
        
        .measurement-item img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .measurement-label {
            font-weight: 700;
            margin-top: 15px;
            font-size: 18px;
            color: #333;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .size-guide-header {
                padding: 30px 20px;
            }
            
            .size-content {
                padding: 40px 20px;
            }
        }
        
        @media (max-width: 992px) {
            .size-guide-title {
                font-size: 36px;
            }
            
            .section-title {
                font-size: 32px;
            }
        }
        
        @media (max-width: 768px) {
            .size-guide-title {
                font-size: 32px;
            }
            
            .size-guide-subtitle {
                font-size: 18px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .measurement-guide {
                padding: 25px;
            }
        }
        
        @media (max-width: 576px) {
            .size-guide-title {
                font-size: 28px;
            }
            
            .size-guide-header {
                padding: 25px 15px;
            }
            
            .section-title {
                font-size: 24px;
            }
            
            .card-title {
                font-size: 22px;
            }
            
            .size-tips {
                grid-template-columns: 1fr;
            }
        }