body { font-family: 'Inter', sans-serif; }
        /* 呼吸灯特效 - 调淡一点，更自然 */
        @keyframes breathe-shadow {
            0% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.2); }
            50% { box-shadow: 0 0 30px rgba(59, 130, 246, 0.5); }
            100% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.2); }
        }
        .hero-glow {
            animation: breathe-shadow 4s infinite ease-in-out;
        }