:root{--color-primary:#ee1c25;--color-primary-dark:#cc1820;--color-primary-light:#ff4d4d;--color-accent:#ee1c25;--color-accent-hover:#cc1820;--color-bg:#fff;--color-bg-secondary:#f8f9fa;--color-bg-dark:#111;--color-bg-card:#fff;--color-text:#1e1e1e;--color-text-secondary:#555;--color-text-light:#999;--color-text-inverse:#fff;--color-border:#e5e5e5;--color-border-hover:#ccc;--color-success:#10b981;--color-success-bg:#ecfdf5;--color-warning:#f59e0b;--color-warning-bg:#fffbeb;--color-error:#ef4444;--color-error-bg:#fef2f2;--color-info:#3b82f6;--color-info-bg:#eff6ff;--color-cummins:#ee1c25;--color-caterpillar:#fdb813;--color-caterpillar-dark:#1a1a1a;--color-weichai:#005bac;--color-shantui:#d4a017;--font-primary:"Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", "Consolas", monospace;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--font-size-4xl:2.25rem;--font-size-5xl:3.125rem;--line-height-tight:1.2;--line-height-base:1.5;--line-height-relaxed:1.75;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--space-24:6rem;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--radius-full:9999px;--shadow-sm:0 1px 2px #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;--shadow-card:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow-card-hover:0 10px 25px #0000001f, 0 4px 10px #00000014;--transition-fast:.15s ease;--transition-base:.25s ease;--transition-slow:.35s ease;--container-max:1719px;--container-padding:var(--space-6);--z-dropdown:100;--z-sticky:200;--z-modal-backdrop:300;--z-modal:400;--z-toast:500}@media (max-width:768px){:root{--font-size-2xl:1.25rem;--font-size-3xl:1.5rem;--font-size-4xl:1.75rem;--font-size-5xl:2rem}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;font-size:16px}body{font-family:var(--font-primary);font-size:var(--font-size-base);line-height:var(--line-height-base);color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}img,picture,video,canvas,svg{max-width:100%;display:block}input,button,textarea,select{font:inherit;color:inherit}a{color:var(--color-accent);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-accent-hover)}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{line-height:var(--line-height-tight);color:var(--color-text);font-weight:700}h1{font-size:var(--font-size-4xl)}h2{font-size:var(--font-size-3xl)}h3{font-size:var(--font-size-2xl)}h4{font-size:var(--font-size-xl)}.container{max-width:var(--container-max);padding:0 var(--container-padding);width:100%;margin:0 auto}.section{padding:var(--space-16) 0}.section-title{font-size:var(--font-size-5xl);margin-bottom:var(--space-4);color:var(--color-text);font-weight:500}.section-subtitle{font-size:var(--font-size-lg);color:var(--color-text-secondary);max-width:600px}.sku-text{font-family:var(--font-mono);letter-spacing:.025em;color:var(--color-primary);font-weight:500}.btn{justify-content:center;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);font-size:var(--font-size-base);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);white-space:nowrap;border:none;font-weight:600;line-height:1;display:inline-flex}.btn-primary{background:var(--color-primary);color:var(--color-text-inverse)}.btn-primary:hover{background:var(--color-primary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-accent{background:var(--color-accent);color:var(--color-text-inverse)}.btn-accent:hover{background:var(--color-accent-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-outline{color:var(--color-primary);border:2px solid var(--color-primary);background:0 0}.btn-outline:hover{background:var(--color-primary);color:var(--color-text-inverse)}.btn-lg{padding:var(--space-4) var(--space-8);font-size:var(--font-size-lg);border-radius:var(--radius-lg)}.badge{padding:var(--space-1) var(--space-3);font-size:var(--font-size-xs);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em;align-items:center;font-weight:600;display:inline-flex}.badge-success{background:var(--color-success-bg);color:var(--color-success)}.badge-success-spb{color:#fff;background:linear-gradient(135deg,#059669,#10b981);box-shadow:0 2px 4px #0596694d}.badge-warning{background:var(--color-warning-bg);color:var(--color-warning)}.badge-cummins{background:var(--color-cummins);color:#fff}.badge-caterpillar{background:var(--color-caterpillar);color:var(--color-caterpillar-dark)}.badge-weichai{background:var(--color-weichai);color:#fff}.badge-shantui{background:var(--color-shantui);color:#fff}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.animate-fadeInUp{opacity:0;animation:.6s forwards fadeInUp}.animate-fadeIn{animation:.4s forwards fadeIn}.delay-1{animation-delay:.1s}.delay-2{animation-delay:.2s}.delay-3{animation-delay:.3s}.delay-4{animation-delay:.4s}.delay-5{animation-delay:.5s}.delay-6{animation-delay:.6s}.delay-7{animation-delay:.7s}.form-group{gap:var(--space-2);flex-direction:column;display:flex}.form-label{font-size:var(--font-size-sm);color:var(--color-text);font-weight:600}.form-input,.form-textarea{padding:var(--space-3) var(--space-4);border:2px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--font-size-base);background:var(--color-bg);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);width:100%}.form-input:focus,.form-textarea:focus{border-color:var(--color-accent);outline:none;box-shadow:0 0 0 3px #3b82f626}.form-input::placeholder,.form-textarea::placeholder{color:var(--color-text-light)}.form-textarea{resize:vertical;min-height:100px}.form-error{font-size:var(--font-size-xs);color:var(--color-error)}.form-honeypot{opacity:0;width:0;height:0;position:absolute;left:-9999px;overflow:hidden}@media (max-width:1024px){:root{--container-padding:var(--space-5)}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-2xl)}h3{font-size:var(--font-size-xl)}.section{padding:var(--space-12) 0}}@media (max-width:768px){:root{--container-padding:var(--space-4)}h1{font-size:var(--font-size-2xl)}h2{font-size:var(--font-size-xl)}.section{padding:var(--space-10) 0}.btn-lg{padding:var(--space-3) var(--space-6);font-size:var(--font-size-base)}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border-hover);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-light)}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}