:root{--c-brand:#0e7c6b;--c-brand-light:#e6f5f2;--c-brand-dark:#065a4e;--c-bg:#ffffff;--c-bg-alt:#f5f6f7;--c-bg-dark:#1a1d21;--c-text:#1a1d21;--c-text-secondary:#5a6270;--c-border:#e2e5e8;--f-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;--s-xs:4px;--s-sm:8px;--s-md:16px;--s-lg:24px;--s-xl:32px;--s-2xl:48px;--s-3xl:64px;--s-section:80px;--w-max:1120px;--radius:4px;--shadow-md:0 2px 8px rgba(0,0,0,.08);--transition:.2s ease}*,*::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(--f-sans);color:var(--c-text);background:var(--c-bg);line-height:1.7;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%}svg{display:block}a{color:inherit;text-decoration:none}ul,ol{list-style:none}.container{width:100%;max-width:var(--w-max);margin:0 auto;padding:0 var(--s-lg)}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-border)}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{font-size:15px;font-weight:700;color:var(--c-brand);letter-spacing:-.02em;white-space:nowrap}.logo span{color:var(--c-text)}.nav-links{display:flex;gap:var(--s-lg);font-size:14px}.nav-links a{color:var(--c-text-secondary);transition:color var(--transition);padding:var(--s-xs) 0}.nav-links a:hover,.nav-links a.active{color:var(--c-brand)}.mobile-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;background:none;border:none;cursor:pointer;color:var(--c-text);padding:0}.mobile-toggle-icon{width:24px;height:24px;display:block;flex:none;max-width:none;max-height:none}.hero{position:relative;overflow:hidden;padding:var(--s-3xl) 0 var(--s-2xl);background:var(--c-bg-dark);color:#fff}.hero .bg-img{position:absolute;inset:0;background:url('img/hero.webp') center/cover no-repeat;opacity:.65}.hero .container{position:relative;z-index:1}.hero h1{font-size:clamp(28px,4vw,42px);font-weight:700;letter-spacing:-.02em;line-height:1.2;max-width:640px}.hero h1 em{font-style:normal;color:var(--c-brand)}.hero p{margin-top:var(--s-md);font-size:16px;color:rgba(255,255,255,.75);max-width:520px;line-height:1.7}.hero-tags{display:flex;gap:var(--s-sm);margin-top:var(--s-lg);flex-wrap:wrap}.hero-tags span{font-size:12px;padding:4px 12px;border:1px solid rgba(255,255,255,.25);border-radius:2px;color:rgba(255,255,255,.8)}.section{padding:var(--s-section) 0}.section-alt{background:var(--c-bg-alt)}.section-label{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--c-brand);font-weight:600}.section-title{font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:-.01em;margin-top:var(--s-sm);line-height:1.3}.section-subtitle{font-size:15px;color:var(--c-text-secondary);margin-top:var(--s-sm);max-width:560px;line-height:1.7}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-xl);margin-top:var(--s-xl);align-items:center}.about-grid img{width:100%;border-radius:var(--radius);object-fit:cover;aspect-ratio:4/3}.about-text p{font-size:15px;color:var(--c-text-secondary);line-height:1.8;margin-top:var(--s-md)}.about-text p:first-child{margin-top:0}.about-highlights{display:flex;gap:var(--s-xl);margin-top:var(--s-lg)}.about-highlights dl{flex:1}.about-highlights dt{font-size:13px;color:var(--c-brand);font-weight:600;text-transform:uppercase;letter-spacing:.04em}.about-highlights dd{font-size:14px;color:var(--c-text-secondary);margin-top:var(--s-xs);line-height:1.6}.product-tabs{display:flex;gap:var(--s-sm);margin-top:var(--s-lg);border-bottom:1px solid var(--c-border)}.product-tabs button{padding:var(--s-sm) var(--s-md);font-size:14px;font-weight:600;background:none;border:none;cursor:pointer;color:var(--c-text-secondary);border-bottom:2px solid transparent;transition:all var(--transition)}.product-tabs button.active{color:var(--c-brand);border-bottom-color:var(--c-brand)}.product-tabs button:hover{color:var(--c-brand)}.product-panel{display:none;margin-top:var(--s-xl)}.product-panel.active{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-xl);align-items:start}.product-panel .panel-img{width:100%;border-radius:var(--radius);object-fit:cover;aspect-ratio:16/10}.product-panel h3{font-size:20px;font-weight:700;letter-spacing:-.01em}.product-panel p{font-size:14px;color:var(--c-text-secondary);line-height:1.8;margin-top:var(--s-sm)}.product-panel ul{margin-top:var(--s-md);display:flex;flex-direction:column;gap:var(--s-xs)}.product-panel li{font-size:14px;color:var(--c-text-secondary);padding-left:var(--s-md);position:relative}.product-panel li::before{content:'';position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--c-brand)}.case-tabs{display:flex;gap:var(--s-sm);margin-top:var(--s-lg)}.case-tabs button{padding:var(--s-sm) var(--s-md);font-size:13px;font-weight:600;background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:2px;cursor:pointer;color:var(--c-text-secondary);transition:all var(--transition)}.case-tabs button.active{background:var(--c-brand);color:#fff;border-color:var(--c-brand)}.case-tabs button:hover:not(.active){border-color:var(--c-brand);color:var(--c-brand)}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--s-md);margin-top:var(--s-lg)}.case-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:var(--s-lg);transition:box-shadow var(--transition)}.case-card:hover{box-shadow:var(--shadow-md)}.case-card h4{font-size:15px;font-weight:700}.case-card .case-tags{display:flex;flex-wrap:wrap;gap:var(--s-xs);margin-top:var(--s-sm)}.case-card .case-tags span{font-size:11px;padding:2px 8px;background:var(--c-brand-light);color:var(--c-brand-dark);border-radius:2px}.contact-grid{display:grid;grid-template-columns:1fr;gap:var(--s-xl);margin-top:var(--s-xl)}.contact-info{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--s-lg)}.contact-item{display:flex;gap:var(--s-md);align-items:flex-start}.contact-item .icon{width:36px;height:36px;border-radius:50%;background:var(--c-brand-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--c-brand);line-height:0}.contact-item .icon svg{width:20px;height:20px;display:block;flex:none;max-width:none;max-height:none}.contact-item .icon-phone svg{width:16px;height:16px}.contact-item .icon-fax svg{width:18px;height:18px}.contact-item .icon-location svg{width:22px;height:22px}.contact-item .icon-mail svg{width:18px;height:18px}.contact-item h4{font-size:14px;font-weight:600}.contact-item p{font-size:13px;color:var(--c-text-secondary);margin-top:2px}.site-footer{background:var(--c-bg-dark);color:rgba(255,255,255,.5);padding:var(--s-lg) 0;font-size:13px}.site-footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--s-md)}.footer-links{display:flex;gap:var(--s-xs)}@media(max-width:768px){.nav-links{display:none}.mobile-toggle{display:inline-flex}.nav-links.open{display:flex;flex-direction:column;position:absolute;top:60px;left:0;right:0;background:#fff;border-bottom:1px solid var(--c-border);padding:var(--s-md) var(--s-lg);gap:var(--s-md)}.about-grid,.product-panel.active,.contact-grid{grid-template-columns:1fr}.contact-info{grid-template-columns:1fr}.about-highlights{flex-direction:column;gap:var(--s-md)}.hero{padding:var(--s-2xl) 0 var(--s-xl)}.section{padding:var(--s-xl) 0}}@media(max-width:560px){.product-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--s-sm)}.case-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--s-sm)}}.case-panel{display:none;margin-top:var(--s-lg)}.case-panel.active{display:block}