:root{--primary-blue: #0A5BE9;--primary-purple: #7B61FF;--bg-white: #FFFFFF;--bg-gray: #F5F7FA;--text-dark: #333333;--text-gray: #666666;--text-light: #999999;--gradient-blue: linear-gradient(135deg, #0A5BE9 0%, #0842A0 100%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Source Han Sans SC,思源黑体,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--text-dark);background:var(--bg-white);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}ul,ol{list-style:none}img{max-width:100%;height:auto}.container{max-width:1200px;margin:0 auto;padding:0 20px}.section{padding:80px 0}.section-title{font-size:32px;font-weight:700;color:var(--text-dark);text-align:center;margin-bottom:16px}.section-subtitle{font-size:18px;color:var(--text-gray);text-align:center;margin-bottom:48px}.btn-primary{display:inline-block;padding:14px 32px;background:var(--primary-blue);color:#fff;border-radius:var(--radius-sm);font-size:16px;font-weight:600;border:none;cursor:pointer;transition:all .3s ease}.btn-primary:hover{background:#0842a0;transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-secondary{display:inline-block;padding:14px 32px;background:transparent;color:#fff;border:2px solid white;border-radius:var(--radius-sm);font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-secondary:hover{background:#fff;color:var(--primary-blue);transform:translateY(-2px)}.btn-outline{display:inline-block;padding:14px 32px;background:transparent;color:var(--primary-blue);border:2px solid var(--primary-blue);border-radius:var(--radius-sm);font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-outline:hover{background:var(--primary-blue);color:#fff;transform:translateY(-2px)}.card-hover{transition:all .3s ease}.card-hover:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}.fade-in.visible{opacity:1;transform:translateY(0)}@media (max-width: 768px){.section{padding:60px 0}.section-title{font-size:24px}.section-subtitle{font-size:16px}.container{padding:0 16px}}