:root{--color-primary: #0A2463;--color-secondary: #F0C808;--color-success: #2E933C;--color-danger: #D72638;--color-text: #333333;--color-text-light: #666666;--color-bg-light: #F5F7FA;--color-white: #FFFFFF;--font-family-base: "Roboto", "Source Han Sans CN", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;--header-height: 72px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family-base);color:var(--color-text);line-height:1.5;background-color:var(--color-bg-light);-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit;transition:color .3s}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#aaa}.container{width:100%;margin:0 auto;padding:0 24px}@media (min-width: 640px){.container{max-width:640px}}@media (min-width: 768px){.container{max-width:768px}}@media (min-width: 1024px){.container{max-width:1024px}}@media (min-width: 1280px){.container{max-width:1280px}}@media (min-width: 1536px){.container{max-width:1440px}}.section-title{font-size:2.5rem;font-weight:700;text-align:center;margin-bottom:4rem;color:var(--color-primary);position:relative}.section-title:after{content:"";display:block;width:60px;height:4px;background:var(--color-secondary);margin:16px auto 0;border-radius:2px}.section-padding{padding:100px 0}.desktop-only{display:none!important}.mobile-only{display:block!important}@media (min-width: 768px){.desktop-only{display:flex!important}.mobile-only{display:none!important}}.flex-center{display:flex;align-items:center;justify-content:center}.flex-between{display:flex;align-items:center;justify-content:space-between}.header-root{position:fixed;top:0;left:0;width:100%;height:var(--header-height);background:#ffffffe6;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px #0000000d;z-index:1000;transition:all .3s ease}.header-container{height:100%;display:flex;align-items:center;justify-content:space-between}.nav-desktop{display:flex;align-items:center;gap:40px}.nav-link{font-size:16px;font-weight:500;color:var(--color-text-light);position:relative;padding:8px 0}.nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--color-primary);transition:width .3s ease}.nav-link:hover{color:var(--color-primary)}.nav-link:hover:after{width:100%}.nav-link.active{color:var(--color-primary);font-weight:600}.nav-link.active:after{width:100%}.mobile-menu-btn{background:none;border:none;cursor:pointer;color:var(--color-text);padding:8px;border-radius:4px}.mobile-menu-btn:hover{background-color:#0000000d}.mobile-menu-dropdown{position:absolute;top:100%;left:0;width:100%;background:#fff;box-shadow:0 4px 12px #0000001a;padding:24px;display:flex;flex-direction:column;gap:16px;border-top:1px solid rgba(0,0,0,.05);animation:slideDown .3s ease-out}.mobile-nav-link{font-size:16px;color:var(--color-text);padding:12px;border-radius:8px;transition:background .2s}.mobile-nav-link:hover{background-color:var(--color-bg-light);color:var(--color-primary)}.mobile-nav-link.active{background-color:#0a24630d;color:var(--color-primary);font-weight:600}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}