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1.125rem);--font-size-lg:clamp(1.125rem, 1.05rem + 0.38vw, 1.5rem);--font-size-xl:clamp(1.5rem, 1.35rem + 0.75vw, 2.25rem);--font-size-2xl:clamp(2rem, 1.7rem + 1.5vw, 3.5rem);--font-size-hero:clamp(3rem, 2.4rem + 3vw, 6rem);--font-weight-regular:400;--font-weight-medium:500;--font-weight-bold:700;--font-weight-black:900;--spacing-xs:0.5rem;--spacing-sm:1rem;--spacing-md:2rem;--spacing-lg:4rem;--spacing-xl:8rem;--spacing-2xl:12rem;--container-width:1440px;--border-radius-sm:8px;--border-radius-md:16px;--border-radius-lg:24px;--border-radius-pill:9999px;--glass-blur:16px;--glass-border:1px solid rgba(255, 255, 255, 0.08);--glass-bg:linear-gradient( 135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100% );--glow-primary:0 0 40px rgba(41, 121, 255, 0.3);--glow-text:0 0 20px rgba(255, 255, 255, 0.15);--ease-spring:cubic-bezier(0.175, 0.885, 0.32, 1.275);--ease-smooth:cubic-bezier(0.65, 0, 0.35, 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scale(1)}}.main-nav{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:1.5rem 0;transition:padding .4s var(--ease-smooth),background .4s var(--ease-smooth)}.nav-container{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:var(--font-weight-black);letter-spacing:-.05em;color:var(--color-text-primary)}.logo .dot{color:var(--color-brand-primary)}.nav-links{display:flex;gap:2.5rem;align-items:center}.nav-links a{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);transition:color .3s var(--ease-smooth),transform .3s var(--ease-smooth);position:relative}.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--color-brand-primary);transition:width .3s var(--ease-smooth)}.nav-links a:hover{color:var(--color-text-primary)}.nav-links a:hover::after{width:100%}.btn-primary{padding:.75rem 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40%,rgba(0,0,0,.9));z-index:1}.work-card-content{position:relative;z-index:2}.work-category{font-size:var(--font-size-xs);color:var(--color-brand-accent);margin-bottom:.5rem;display:block}.work-title{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:#fff}@media (max-width:768px){.showcase-grid{grid-template-columns:1fr}}.main-footer{padding:var(--spacing-xl) 0;background:var(--color-bg-deep);border-top:1px solid rgba(255,255,255,.05)}.footer-content{display:flex;justify-content:space-between;align-items:center}.copyright{font-size:var(--font-size-sm);color:var(--color-text-secondary);opacity:.7;display:flex;flex-direction:column;gap:4px}.copyright p{margin:0}.designed-by{font-size:var(--font-size-sm);opacity:.6;transition:opacity .3s var(--ease-smooth)}.designed-by a{color:var(--color-brand-primary);text-decoration:none;transition:color .3s var(--ease-smooth)}.designed-by 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img{width:100%;border-radius:4px;display:block}.wechat-container:hover .qr-popup{display:block}#wechat-link{cursor:copy}@keyframes fadeUp{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}.about-section{padding:0;border-top:1px solid rgba(255,255,255,.05);min-height:320px;display:flex;align-items:center;justify-content:center;background:rgba(10,10,15,.2)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);place-items:center;gap:40px;max-width:900px;margin:0 auto;width:100%}.stat-item{text-align:center;padding:20px 30px}.stat-number{display:block;font-size:3rem;line-height:1;font-weight:var(--font-weight-bold);color:#fff;margin-bottom:12px;font-variant-numeric:tabular-nums;letter-spacing:-.02em}.stat-label{display:block;font-size:var(--font-size-sm);line-height:1.3;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.1em}@media (max-width:768px){.footer-content{flex-direction:column;gap:var(--spacing-md);text-align:center}.stats-grid{grid-template-columns:1fr;gap:var(--spacing-md)}}.competencies-section{padding:var(--spacing-2xl) 0;background:var(--color-bg-deep);position:relative}.competencies-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.comp-card{padding:var(--spacing-lg);border-radius:var(--border-radius-lg);background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.05);transition:all .5s var(--ease-spring);position:relative;overflow:hidden}.comp-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at var(--mouse-x,50%) var(--mouse-y,50%),rgba(41,121,255,.1) 0,transparent 60%);opacity:0;transition:opacity .5s var(--ease-smooth);pointer-events:none}.comp-card:hover{transform:translateY(-10px);background:rgba(255,255,255,.04);border-color:rgba(41,121,255,.3);box-shadow:0 20px 40px rgba(0,0,0,.3)}.comp-card:hover::before{opacity:1}.comp-icon{width:48px;height:48px;margin-bottom:var(--spacing-md);color:var(--color-brand-primary)}.comp-card h3{font-size:var(--font-size-lg);font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-sm);color:var(--color-text-primary)}.comp-card p{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:1.6}@media (max-width:992px){.competencies-grid{grid-template-columns:1fr}}.process-section{padding:var(--spacing-2xl) 0;background:var(--color-bg-surface)}.process-timeline{display:flex;justify-content:space-between;position:relative;margin-top:var(--spacing-xl);padding-bottom:var(--spacing-lg)}.process-timeline::after{content:'';position:absolute;top:30px;left:0;width:100%;height:1px;background:linear-gradient(90deg,transparent 0,rgba(41,121,255,.3) 20%,rgba(41,121,255,.3) 80%,transparent 100%);z-index:1}.process-step{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 var(--spacing-md);position:relative;z-index:2}.step-number{width:60px;height:60px;background:var(--color-bg-deep);border:1px solid rgba(41,121,255,.4);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:var(--font-weight-black);color:var(--color-brand-primary);margin-bottom:var(--spacing-md);transition:all .4s var(--ease-spring);backdrop-filter:blur(10px)}.process-step:hover .step-number{background:var(--color-brand-primary);color:#fff;transform:scale(1.1);box-shadow:var(--glow-primary)}.step-title{font-size:var(--font-size-base);font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-xs);color:var(--color-text-primary)}.step-desc{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:1.5}@media (max-width:768px){.process-timeline{flex-direction:column;gap:var(--spacing-lg);align-items:flex-start}.process-timeline::after{left:30px;top:0;width:1px;height:100%}.process-step{flex-direction:row;text-align:left;gap:var(--spacing-md)}.step-number{flex-shrink:0;margin-bottom:0}}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(20px);background:rgba(255,255,255,.1);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1);padding:12px 24px;border-radius:50px;box-shadow:0 10px 40px rgba(0,0,0,.4);z-index:1000;opacity:0;visibility:hidden;transition:all .4s cubic-bezier(.175, .885, .32, 1.275)}.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}.toast-content{display:flex;align-items:center;gap:12px}.toast-icon{width:20px;height:20px;color:#4ade80}.toast-message{color:#fff;font-size:.875rem;font-weight:500}.watermark-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml;utf8,BlueHeart Interactive © 2026');pointer-events:none;opacity:.8;z-index:10;display:none}.work-card-inner{position:relative;overflow:hidden}.work-card-inner::after{display:none}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 var(--spacing-sm)}.text-gradient{background:linear-gradient(135deg,var(--color-text-primary) 0,var(--color-text-secondary) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.text-brand-gradient{background:linear-gradient(135deg,var(--color-brand-primary) 0,var(--color-brand-accent) 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