:root{--color-primary:#0A0A0A;--color-secondary:#1A1A1A;--color-accent:#FF4D00;--color-accent-hover:#E64400;--color-accent-light:#FFF3ED;--color-accent-shadow:rgba(255, 77, 0, 0.1);--color-text:#1A1A1A;--color-text-muted:#6B7280;--color-text-light:#9CA3AF;--color-bg-white:#FFFFFF;--color-bg-light:#F5F5F5;--color-bg-soft:#FAFAFA;--color-border:#E5E5E5;--color-border-light:#F0F0F0;--color-metal:#8A9099;--color-success:#16A34A;--color-success-text:#166534;--color-success-bg:#F0FDF4;--color-success-border:#BBF7D0;--color-danger:#DC2626;--color-danger-text:#991B1B;--color-danger-bg:#FEF2F2;--color-danger-border:#FECACA;--overlay-primary-85:rgba(10, 10, 10, 0.85);--overlay-primary-50:rgba(10, 10, 10, 0.5);--overlay-primary-40:rgba(10, 10, 10, 0.4);--overlay-white-85:rgba(255, 255, 255, 0.85);--overlay-white-75:rgba(255, 255, 255, 0.75);--overlay-white-70:rgba(255, 255, 255, 0.7);--overlay-white-65:rgba(255, 255, 255, 0.65);--overlay-white-60:rgba(255, 255, 255, 0.6);--overlay-white-50:rgba(255, 255, 255, 0.5);--overlay-white-10:rgba(255, 255, 255, 0.1);--overlay-white-08:rgba(255, 255, 255, 0.08);--overlay-white-08:rgba(255, 255, 255, 0.08);--overlay-white-05:rgba(255, 255, 255, 0.05);--font-heading:'Inter', 'Alibaba-PuHuiTi', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;--font-body:'Inter', 'Alibaba-PuHuiTi', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;--font-mono:'JetBrains Mono', 'SF Mono', Consolas, monospace;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--text-5xl:3rem;--text-6xl:3.75rem;--space-xs:0.5rem;--space-sm:1rem;--space-md:1.5rem;--space-lg:2rem;--space-xl:3rem;--space-2xl:4rem;--space-3xl:5rem;--space-4xl:6rem;--container-max:1320px;--container-narrow:1140px;--container-text:720px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.05);--shadow-md:0 4px 12px rgba(0, 0, 0, 0.08);--shadow-lg:0 12px 32px rgba(0, 0, 0, 0.12);--shadow-xl:0 20px 48px rgba(0, 0, 0, 0.16);--transition-fast:150ms ease;--transition-base:250ms ease;--transition-slow:400ms ease}*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;color:var(--color-text);background-color:#FFF;margin:0;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-accent)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.2;color:var(--color-primary);margin:0 0 var(--space-sm)}h1{font-size:var(--text-5xl);letter-spacing:-.02em}h2{font-size:var(--text-4xl);letter-spacing:-.02em}h3{font-size:var(--text-3xl);letter-spacing:-.01em}h4{font-size:var(--text-2xl)}h5{font-size:var(--text-xl)}h6{font-size:var(--text-lg)}p{margin:0 0 var(--space-sm);color:var(--color-text-muted)}.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--space-md)}.container--narrow{max-width:var(--container-narrow)}.container--text{max-width:var(--container-text)}.btn,.button,button[type="submit"],input[type="submit"]{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);padding:.875rem 2rem;font-family:var(--font-heading);font-size:var(--text-sm);font-weight:600;letter-spacing:.02em;text-transform:uppercase;border:2px solid #fff0;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-base);white-space:nowrap}.btn--primary{background-color:var(--color-accent);color:var(--color-bg-white);border-color:var(--color-accent)}.btn--primary:hover{background-color:var(--color-accent-hover);border-color:var(--color-accent-hover);color:var(--color-bg-white);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn--outline{background-color:#fff0;color:var(--color-bg-white);border-color:var(--color-bg-white)}.btn--outline:hover{background-color:var(--color-bg-white);color:var(--color-primary)}.btn--dark{background-color:var(--color-primary);color:var(--color-bg-white);border-color:var(--color-primary)}.btn--dark:hover{background-color:var(--color-secondary);border-color:var(--color-secondary);color:var(--color-bg-white)}.section{padding:var(--space-4xl) 0}.section--light{background-color:var(--color-bg-light)}.section--dark{background-color:var(--color-primary);color:var(--color-bg-white)}.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:var(--color-bg-white)}.section--dark p{color:rgb(255 255 255 / .7)}.section-header{text-align:center;max-width:720px;margin:0 auto var(--space-3xl)}.section-header__label{display:inline-block;font-family:var(--font-heading);font-size:var(--text-xs);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent);margin-bottom:var(--space-sm)}.section-header__title{font-size:var(--text-4xl);margin-bottom:var(--space-sm)}.section-header__desc{font-size:var(--text-lg);color:var(--color-text-muted)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-accent{color:var(--color-accent)}.text-muted{color:var(--color-text-muted)}.text-white{color:var(--color-bg-white)}.mt-0{margin-top:0}.mb-0{margin-bottom:0}.mx-auto{margin-left:auto;margin-right:auto}@media (max-width:1024px){h1{font-size:var(--text-4xl)}h2{font-size:var(--text-3xl)}.section{padding:var(--space-3xl) 0}}@media (max-width:768px){h1{font-size:var(--text-3xl)}h2{font-size:var(--text-2xl)}h3{font-size:var(--text-xl)}.section{padding:var(--space-2xl) 0}.section-header__title{font-size:var(--text-3xl)}.btn{padding:.75rem 1.5rem}}@media (max-width:480px){h1{font-size:var(--text-2xl)}.section-header__title{font-size:var(--text-2xl)}}