/* 关键CSS - 首屏渲染必需样式 (压缩版) */
*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color:#1890ff;--primary-dark:#1570cc;--primary-light:#40a9ff;--primary-lighter:#bae7ff;--secondary-color:#52c41a;--accent-color:#fa8c16;--warning-color:#faad14;--error-color:#f5222d;--text-primary:#262626;--text-secondary:#595959;--text-disabled:#bfbfbf;--bg-primary:#ffffff;--bg-secondary:#fafafa;--bg-dark:#001529;--border-color:#e8e8e8;--font-primary:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--spacing-3xl:64px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 2px 8px rgba(0,0,0,0.04);--shadow-md:0 4px 16px rgba(0,0,0,0.08);--shadow-lg:0 8px 32px rgba(0,0,0,0.12);--transition-fast:0.2s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease}html{scroll-behavior:smooth}body{font-family:var(--font-primary);line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);overflow-x:hidden;opacity:0;transition:opacity 0.3s ease-in-out}body.loaded{opacity:1}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-md) var(--spacing-xl);border:none;border-radius:var(--radius-md);font-size:16px;font-weight:600;text-decoration:none;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--primary-light));color:white;box-shadow:var(--shadow-md)}.btn-primary:hover{background:linear-gradient(135deg,var(--primary-dark),var(--primary-color));transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:transparent;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background:var(--primary-color);color:white}.navbar{position:fixed;top:0;width:100%;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);z-index:1000;transition:all var(--transition-fast)}.navbar .container{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-lg)}.nav-brand{display:flex;align-items:center;gap:var(--spacing-md)}.logo{height:50px;width:auto}.brand-name{font-size:24px;font-weight:700;color:var(--primary-color)}.nav-menu{display:flex;list-style:none;gap:var(--spacing-xl)}.nav-link{text-decoration:none;color:var(--text-primary);font-weight:500;transition:all var(--transition-fast);position:relative;padding:8px 16px;border-radius:6px;background:transparent}.nav-link:hover{color:var(--primary-color);background:rgba(24,144,255,0.08);transform:translateY(-1px)}.nav-link.active{color:var(--primary-color);background:rgba(24,144,255,0.12);font-weight:600;box-shadow:0 2px 8px rgba(24,144,255,0.2)}.nav-link::after{content:'';position:absolute;bottom:-4px;left:50%;transform:translateX(-50%);width:0;height:3px;background:linear-gradient(90deg,var(--primary-color),var(--primary-light));border-radius:2px;transition:width var(--transition-fast)}.nav-link:hover::after{width:60%}.nav-link.active::after{width:80%;box-shadow:0 2px 4px rgba(24,144,255,0.4)}.hero{padding:120px 0 var(--spacing-2xl);background:linear-gradient(135deg,#f0f9ff 0%,#e6f7ff 100%);min-height:100vh;display:flex;align-items:center}.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-2xl);align-items:center}.hero-title{font-size:56px;font-weight:800;line-height:1.2;color:var(--text-primary);margin-bottom:var(--spacing-lg)}.hero-title .highlight{color:var(--primary-color)}.hero-subtitle{font-size:20px;color:var(--text-secondary);margin-bottom:var(--spacing-2xl);line-height:1.8}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg);margin-bottom:var(--spacing-2xl)}.stat-item{text-align:center;padding:var(--spacing-lg);background:white;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:all var(--transition-fast)}.stat-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.stat-number{font-size:32px;font-weight:800;color:var(--primary-color);margin-bottom:var(--spacing-sm)}.stat-label{font-size:14px;color:var(--text-secondary);font-weight:500}.hero-buttons{display:flex;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.hero-image{position:relative}.dashboard-image{width:100%;height:auto;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);transition:all var(--transition-slow)}.dashboard-image:hover{transform:scale(1.02)}.nav-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer}.nav-toggle span{width:25px;height:3px;background:var(--text-primary);border-radius:2px;transition:all var(--transition-fast)}@media (max-width:768px){.nav-menu{display:none}.nav-toggle{display:flex}.hero-content{grid-template-columns:1fr;text-align:center}.hero-title{font-size:36px}.hero-stats{grid-template-columns:repeat(2,1fr)}.hero-buttons{justify-content:center}}
/* 图片优化相关样式 */
img{max-width:100%;height:auto}picture{display:block}img[data-src]{opacity:0;transition:opacity 0.3s ease}img.loaded{opacity:1}
/* WebP支持检测样式 */
.webp-support .fallback-png{display:none}
.no-webp .webp-only{display:none}
/* 性能优化：GPU加速关键元素 */
.navbar,.hero,.btn{will-change:transform;transform:translateZ(0)}
/* 预加载动画 */
.loading-placeholder{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s infinite}@keyframes loading{0%{background-position:200% 0}100%{background-position:-200% 0}}