:root{--color-primary: #1a1a2e;--color-secondary: #4a4a5a;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-bg-primary: #ffffff;--color-bg-secondary: #f8fafc;--color-border: #e2e8f0;--color-text-muted: #64748b;--font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-size-xs: .875rem;--font-size-sm: 1rem;--font-size-md: 1.125rem;--font-size-lg: 1.5rem;--font-size-xl: 2.25rem;--font-size-2xl: 3rem;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--spacing-2xl: 5rem;--container-max-width: 1200px;--header-height: 64px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--transition-fast: .15s ease;--transition-normal: .3s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-family);font-size:var(--font-size-sm);line-height:1.6;color:var(--color-primary);background-color:var(--color-bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;color:var(--color-primary)}h1{font-size:var(--font-size-2xl)}h2{font-size:var(--font-size-xl)}h3{font-size:var(--font-size-lg)}p{color:var(--color-secondary);line-height:1.8}a{color:var(--color-accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-accent-hover)}.container{max-width:var(--container-max-width);margin:0 auto;padding:0 var(--spacing-lg)}.section{padding:var(--spacing-2xl) 0}.section-alt{background-color:var(--color-bg-secondary)}.section-title{font-size:var(--font-size-xl);text-align:center;margin-bottom:var(--spacing-xl)}@media(max-width:768px){:root{--font-size-2xl: 2rem;--font-size-xl: 1.75rem;--spacing-2xl: 3rem}.container{padding:0 var(--spacing-md)}}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background-color:var(--color-bg-primary);z-index:1000;transition:box-shadow var(--transition-normal)}.header-scrolled{box-shadow:var(--shadow-md)}.header-container{max-width:var(--container-max-width);margin:0 auto;padding:0 var(--spacing-lg);height:100%;display:flex;align-items:center;justify-content:space-between}.header-logo{font-size:var(--font-size-lg);font-weight:700;color:var(--color-primary);cursor:pointer;transition:color var(--transition-fast)}.header-logo:hover{color:var(--color-accent)}.header-nav{display:flex;gap:var(--spacing-lg)}.nav-link{background:none;border:none;font-family:inherit;font-size:var(--font-size-sm);color:var(--color-secondary);cursor:pointer;padding:var(--spacing-xs) var(--spacing-sm);transition:color var(--transition-fast)}.nav-link:hover{color:var(--color-accent)}@media(max-width:640px){.header-container{padding:0 var(--spacing-md)}.header-logo{font-size:var(--font-size-md)}.header-nav{gap:var(--spacing-xs)}.nav-link{padding:var(--spacing-xs);font-size:var(--font-size-xs)}}.footer{background-color:var(--color-bg-secondary);border-top:1px solid var(--color-border);padding:var(--spacing-lg) 0}.footer-container{max-width:var(--container-max-width);margin:0 auto;padding:0 var(--spacing-lg);text-align:center}.footer-copyright{color:var(--color-text-muted);font-size:var(--font-size-xs)}.footer-beian{margin-top:var(--spacing-xs);font-size:var(--font-size-xs)}.footer-beian a{color:var(--color-text-muted);text-decoration:none}.footer-beian a:hover{text-decoration:underline}.hero-section{min-height:100vh;display:flex;align-items:center;justify-content:center;background-color:var(--color-bg-primary);padding-top:var(--header-height)}.hero-container{text-align:center;padding:var(--spacing-lg)}.hero-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-md);letter-spacing:-.02em}.hero-subtitle{font-size:var(--font-size-md);color:var(--color-secondary);max-width:600px;margin:0 auto}@media(max-width:768px){.hero-title{font-size:2rem}.hero-subtitle{font-size:var(--font-size-sm)}}.about-section{background-color:var(--color-bg-secondary)}.about-content{max-width:800px;margin:0 auto}.about-content p{margin-bottom:var(--spacing-md);text-align:justify}.about-content p:last-child{margin-bottom:0}.business-section{background-color:var(--color-bg-primary)}.business-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg);max-width:1000px;margin:0 auto}.business-card{background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:8px;padding:var(--spacing-xl);transition:box-shadow var(--transition-normal),transform var(--transition-normal)}.business-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.business-card-title{font-size:var(--font-size-lg);color:var(--color-primary);margin-bottom:var(--spacing-sm)}.business-card-description{color:var(--color-secondary);line-height:1.8}@media(max-width:768px){.business-grid{grid-template-columns:1fr;gap:var(--spacing-md)}.business-card{padding:var(--spacing-lg)}}.contact-section{background-color:var(--color-bg-secondary)}.contact-content{text-align:center;max-width:600px;margin:0 auto}.contact-description{color:var(--color-secondary);margin-bottom:var(--spacing-xl)}.contact-info{display:flex;justify-content:center}.contact-item{display:flex;flex-direction:column;gap:var(--spacing-xs)}.contact-label{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.contact-value{font-size:var(--font-size-md);color:var(--color-accent);font-weight:500}.contact-value:hover{color:var(--color-accent-hover)}