:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#3b82f6;--color-accent:#06b6d4;--color-gradient:linear-gradient(135deg, #2563eb, #06b6d4);--color-text:#0f172a;--color-text-light:#475569;--color-text-muted:#94a3b8;--color-bg:#fff;--color-bg-soft:#f8fafc;--color-bg-muted:#f1f5f9;--color-border:#e2e8f0;--container-width:1200px;--radius:12px;--shadow-sm:0 1px 2px #0f172a0f;--shadow:0 4px 16px #0f172a14;--shadow-lg:0 12px 40px #0f172a1f}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 24px}.section{padding:96px 0}.section-title{text-align:center;letter-spacing:-.02em;margin-bottom:16px;font-size:2.25rem;font-weight:700}.section-subtitle{color:var(--color-text-light);text-align:center;max-width:640px;margin:0 auto 56px;font-size:1.125rem}.btn{cursor:pointer;white-space:nowrap;border:none;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:12px 28px;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:var(--color-gradient);color:#fff;box-shadow:0 4px 14px #2563eb59}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px #2563eb73}.btn-outline{color:var(--color-primary);border:1.5px solid var(--color-border);background:0 0}.btn-outline:hover{border-color:var(--color-primary);background:var(--color-bg-soft)}@media (width<=768px){.section{padding:64px 0}.section-title{font-size:1.75rem}}