@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
:root{--primary:hsl(215,100%,52%);--primary-light:hsl(215,100%,60%);--primary-dark:hsl(215,100%,45%);--primary-glow:hsla(215,100%,52%,0.15);--accent:hsl(198,93%,60%);--success:hsl(142,76%,36%);--warning:hsl(38,92%,50%);--text:hsl(222,47%,11%);--text-light:hsl(215,16%,47%);--muted:hsl(217,19%,53%);--bg:hsl(0,0%,100%);--surface:hsl(218,32%,97%);--surface-elevated:hsl(0,0%,100%);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--shadow-sm:0 2px 8px hsla(222,47%,11%,0.04);--shadow-md:0 4px 16px hsla(222,47%,11%,0.06);--shadow-lg:0 8px 32px hsla(222,47%,11%,0.08);--shadow-xl:0 12px 48px hsla(222,47%,11%,0.12);--shadow-primary:0 8px 24px hsla(215,100%,52%,0.2);--shadow-glow:0 0 40px hsla(215,100%,52%,0.15);--gradient-primary:linear-gradient(135deg,hsl(215,100%,52%),hsl(215,100%,60%));--gradient-subtle:linear-gradient(180deg,hsl(218,32%,97%),hsl(0,0%,100%));--gradient-hero:linear-gradient(180deg,hsla(215,100%,52%,0.08),hsla(215,100%,52%,0.02));--transition-fast:all 0.15s cubic-bezier(0.4,0,0.2,1);--transition-base:all 0.24s cubic-bezier(0.4,0,0.2,1);--transition-slow:all 0.36s cubic-bezier(0.4,0,0.2,1);--ease:cubic-bezier(0.4,0,0.2,1)}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;letter-spacing:0.01em;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}
.container{width:92%;max-width:1280px;margin:0 auto;padding:0 20px}
header.site-header{position:fixed;top:0;left:0;width:100%;background:hsla(0,0%,100%,0.98);backdrop-filter:blur(12px);z-index:1200;box-shadow:var(--shadow-md);border-bottom:1px solid hsla(222,47%,11%,0.06)}
.logo-wrapper{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.logo-img{width:36px;height:36px;display:block;object-fit:contain;flex-shrink:0}
.logo-text{font-size:1.5rem;font-weight:800;color:var(--text);letter-spacing:0.5px;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.nav-links{display:flex;gap:8px;align-items:center;margin-left:auto;margin-right:32px;position:relative}
.nav-links a{color:var(--text-light);text-decoration:none;padding:10px 16px;border-radius:var(--radius-md);transition:var(--transition-base);font-weight:600;font-size:0.95rem;position:relative;overflow:hidden}
.nav-links a::before{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:var(--gradient-primary);border-radius:2px;transition:var(--transition-base)}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:hsla(215,100%,52%,0.08)}
.nav-links a:hover::before,.nav-links a.active::before{width:calc(100% - 32px)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:2px solid hsla(215,100%,52%,0.2);color:var(--primary);padding:10px 24px;border-radius:var(--radius-lg);background:transparent;font-weight:700;cursor:pointer;transition:var(--transition-base);font-size:0.95rem}
.btn-login:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-primary)}
nav{width:100%;max-width:1280px;display:flex;align-items:center;justify-content:space-between;padding:12px 0}
main{padding-top:0;margin-top:0}
.nav-toggle{background:transparent;border:0;padding:10px;cursor:pointer;border-radius:var(--radius-md);transition:var(--transition-fast)}
.nav-toggle:focus{outline:2px solid var(--primary-glow)}
.nav-toggle .bar{display:block;width:20px;height:2.5px;background:var(--text);margin:4px 0;border-radius:2px;transition:var(--transition-base)}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-links.open{display:flex;flex-direction:column;position:absolute;top:100%;right:16px;background:#fff;padding:16px;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);border:1px solid hsla(222,47%,11%,0.06);min-width:200px;animation:slideIn 0.2s var(--ease)}
.nav-links.open a{color:var(--text);padding:12px 16px;width:100%}
@keyframes slideIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
footer{background:linear-gradient(180deg,hsl(222,47%,11%),hsl(223,44%,14%));padding:64px 0 40px;color:hsla(0,0%,100%,0.9)}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:48px;margin-bottom:40px}
.footer-column h4{font-size:1.1rem;margin-bottom:20px;color:#fff;font-weight:700;letter-spacing:0.3px}
.footer-column ul{list-style:none;padding:0;margin:0}
.footer-column ul li{margin-bottom:12px}
.footer-column ul li a{color:hsla(0,0%,100%,0.7);text-decoration:none;font-size:0.95rem;transition:var(--transition-fast)}
.footer-column ul li a:hover{color:#fff;text-decoration:underline}
.copyright{border-top:1px solid hsla(0,0%,100%,0.1);padding-top:24px;text-align:center;color:hsla(0,0%,100%,0.5);font-size:0.9rem;line-height:1.8}
.copyright p{margin-bottom:8px}
.legal-info{font-size:0.85rem}
.legal-info a{color:hsla(0,0%,100%,0.5);text-decoration:none}
.legal-info a:hover{text-decoration:underline;color:hsla(0,0%,100%,0.7)}
.footer-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px;justify-content:center}
.footer-note{font-size:0.9rem;color:hsla(0,0%,100%,0.6);text-align:center;margin-top:16px}
@media(max-width:1024px){.container{width:95%;padding:0 16px}}
@media(max-width:900px){.nav-links{display:none}.nav-toggle{display:inline-flex}}
@media(max-width:768px){.footer-content{grid-template-columns:1fr;gap:24px;text-align:center}.footer-column ul li a{font-size:0.9rem}}