* { box-sizing: border-box; }
        body { font-family: 'Inter', Arial, sans-serif; line-height: 1.6; color: #2c3e50; margin: 0; }
        .section-padding { padding: 80px 10%; }
        
        /* 带有尺寸说明的工业占位符 */
        .poster-placeholder { height: 450px; background: #e0e0e0; border: 2px dashed #999; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #666; font-weight: bold; margin: 20px 0; }
        .part-placeholder { height: 300px; background: #f8f8f8; border: 1px solid #ddd; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #888; }
        
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
        .cta-btn { display: inline-block; padding: 20px 50px; background: #0056b3; color: #fff; text-decoration: none; font-weight: bold; border-radius: 2px; }