:root{--font-body:"Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-display:"Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--color-primary:#0ea5e9;--color-primary-dark:#0284c7;--color-primary-light:#38bdf8;--color-secondary:#64748b;--color-secondary-light:#94a3b8;--color-accent:#10b981;--color-accent-light:#34d399;--color-bg-primary:#f8fafc;--color-bg-secondary:#f1f5f9;--color-bg-white:#fff;--color-text-primary:#0f172a;--color-text-secondary:#475569;--color-text-muted:#94a3b8;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-20:80px;--space-24:96px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-body);color:var(--color-text-primary);background-color:var(--color-bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);color:var(--color-text-primary);font-weight:600;line-height:1.3}h1{font-size:2.5rem;font-weight:700}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}.container{max-width:1280px;padding:0 var(--space-6);margin:0 auto}.text-gradient{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.bg-gradient{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%)}.bg-gradient-subtle{background:linear-gradient(180deg, var(--color-bg-white) 0%, var(--color-bg-primary) 100%)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.animate-fade-in{animation:.5s ease-out forwards fadeIn}.animate-slide-in{animation:.5s ease-out forwards slideIn}.glass{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffc;border:1px solid #ffffff4d}.card{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:box-shadow .2s,transform .2s}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn{justify-content:center;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);cursor:pointer;border:none;font-size:.95rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-secondary{background:var(--color-bg-secondary);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-border-light);border-color:var(--color-secondary-light)}@media (max-width:768px){h1{font-size:2rem}h2{font-size:1.5rem}.container{padding:0 var(--space-4)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-secondary-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-secondary)}