:root{--brand:#00529B;--brand-light:#0070CC;--brand-dark:#003D75;--accent:#00A3E0;--bg:#FFFFFF;--bg-alt:#F5F7FA;--bg-dark:#0A1628;--bg-dark2:#0D2440;--text:#1A1A1A;--text-mid:#555555;--text-light:#888888;--text-inverse:#FFFFFF;--border:#E8ECF1;--radius:12px;--radius-lg:20px;--radius-sm:8px;--shadow:0 2px 16px rgba(0,0,0,0.06);--shadow-lg:0 8px 40px rgba(0,0,0,0.10);--shadow-blue:0 4px 24px rgba(0,82,155,0.15);--font-en:'Inter',sans-serif;--font-cn:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;--max-width:1280px;--nav-height:72px;--transition:0.3s cubic-bezier(0.25,0.1,0.25,1)}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-cn);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}img{max-width:100%;display:block}a{text-decoration:none;color:inherit}ul{list-style:none}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section-padding{padding:100px 0}.section-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-en);font-size:0.7rem;font-weight:700;letter-spacing:0.12em;color:var(--brand);text-transform:uppercase;margin-bottom:16px}.section-tag::before{content:'';width:20px;height:1px;background:var(--brand)}.section-tag.light{color:var(--accent)}.section-tag.light::before{background:var(--accent)}.section-title{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:800;line-height:1.25;margin-bottom:16px;letter-spacing:-0.02em}.section-title.light{color:var(--text-inverse);word-break:keep-all}.section-desc{font-size:1.05rem;color:var(--text-mid);max-width:600px;line-height:1.7}.section-desc.center{margin:0 auto;text-align:center}.section-desc.light{color:rgba(255,255,255,0.6)}.bg-alt{background:var(--bg-alt)}.bg-dark{background:var(--bg-dark)}.text-center{text-align:center}.mt-40{margin-top:40px}.mb-40{margin-bottom:40px}.btn{display:inline-flex;align-items:center;gap:8px;font-size:0.95rem;font-weight:600;border:none;border-radius:var(--radius);padding:14px 32px;cursor:pointer;transition:var(--transition)}.btn-primary{color:#fff;background:var(--brand)}.btn-primary:hover{background:var(--brand-light);transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,82,155,0.35)}.btn-outline{color:var(--brand);background:transparent;border:1.5px solid var(--brand)}.btn-outline:hover{background:var(--brand);color:#fff}.btn-outline-white{color:#fff;background:transparent;border:1.5px solid rgba(255,255,255,0.25);backdrop-filter:blur(8px)}.btn-outline-white:hover{border-color:#fff;background:rgba(255,255,255,0.08)}.btn-sm{padding:10px 22px;font-size:0.85rem}.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:0.9rem;font-weight:600;color:var(--brand);transition:var(--transition)}.arrow-link:hover{gap:10px}.arrow-link svg{transition:var(--transition)}.arrow-link:hover svg{transform:translateX(3px)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.nav{position:fixed;top:0;width:100%;height:var(--nav-height);z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid transparent;transition:var(--transition)}.nav.scrolled{background:rgba(255,255,255,0.97);border-bottom-color:var(--border);box-shadow:0 1px 8px rgba(0,0,0,0.04)}.nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}.nav-logo img{height:36px}.nav-links{display:flex;align-items:center;gap:32px}.nav-links a{font-size:0.875rem;font-weight:500;color:var(--text-mid);transition:var(--transition);position:relative;padding:4px 0}.nav-links a:hover,.nav-links a.active{color:var(--brand)}.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--brand);transition:var(--transition)}.nav-links a:hover::after{width:100%}