:root{--primary:#0066CC;--primary-dark:#004999;--primary-light:#3385D6;--primary-50:#E8EEF6;--accent:#00A8E8;--accent-dark:#0086B8;--white:#FCFBF9;--gray-50:#F5F3F0;--gray-100:#EFECE8;--gray-200:#E4E0DA;--gray-300:#D4CFC8;--gray-400:#A0998F;--gray-500:#6B6560;--gray-600:#4D4845;--gray-700:#383532;--gray-800:#252220;--gray-900:#161412;--success:#10B981;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow:0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06);--shadow-md:0 4px 6px rgba(0,0,0,0.07),0 2px 4px rgba(0,0,0,0.06);--shadow-lg:0 10px 15px rgba(0,0,0,0.1),0 4px 6px rgba(0,0,0,0.05);--shadow-xl:0 20px 25px rgba(0,0,0,0.1),0 10px 10px rgba(0,0,0,0.04);--radius-sm:6px;--radius:12px;--radius-lg:20px;--radius-full:9999px;--transition:all 0.3s cubic-bezier(0.4,0,0.2,1);--max-width:1200px;--header-h:72px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px;font-size:16px}body{font-family:'Noto Sans SC','Inter',-apple-system,BlinkMacSystemFont,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--gray-800);background:linear-gradient(180deg,#FCFBF9 0%,#F8F6F3 30%,#F5F3F0 60%,#F8F6F3 100%);background-attachment:fixed;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased;padding-top:var(--header-h)}h1,h2,h3,h4{font-weight:700;line-height:1.3;color:var(--gray-900)}h1{font-size:2.2rem;font-size:clamp(2.2rem,4.5vw,3.5rem)}h2{font-size:1.8rem;font-size:clamp(1.8rem,3.5vw,2.5rem)}h3{font-size:1.1rem;font-size:clamp(1.1rem,2vw,1.5rem)}a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-dark)}.container{max-width:var(--max-width);margin:0 auto}.topbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:#FCFBF9;background:rgba(252,251,249,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,0.06);transition:var(--transition)}.topbar-inner{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}.topbar .logo{display:flex;flex-direction:column;align-items:center;gap:0;font-size:1.15rem;font-weight:800;color:var(--gray-900);text-decoration:none}.topbar .logo span{font-size:1.6rem}.topbar .logo small{font-size:0.68rem;color:var(--gray-500);font-weight:400;display:block;line-height:1.2}.main-nav{display:flex;align-items:center;gap:1.8rem;list-style:none}.main-nav a{color:var(--gray-600);font-weight:500;font-size:0.9rem;position:relative;padding:0.2rem 0}.main-nav a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--primary);transition:width 0.3s ease}.main-nav a:hover::after,.main-nav a.active::after{width:100%}.main-nav a:hover,.main-nav a.active{color:var(--primary)}.main-nav .nav-cta{background:var(--primary);color:#fff!important;padding:0.55rem 1.4rem!important;border-radius:var(--radius-full);font-weight:600!important}.main-nav .nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,102,204,0.3)}.main-nav .nav-cta::after{display:none!important}.lang-switch{display:flex;gap:2px;background:var(--gray-50);border-radius:var(--radius-full);padding:3px}.lang-switch a{padding:6px 16px;border-radius:var(--radius-full);text-decoration:none;font-size:0.85rem;font-weight:600;transition:var(--transition);color:var(--gray-500)}.lang-switch a.active{background:var(--primary);color:#fff}.lang-switch a:hover:not(.active){color:var(--gray-700)}.hero{position:relative;min-height:85vh;min-height:85dvh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1A2436 0%,#243550 35%,#1E4060 65%,#1A5A8A 100%);overflow:hidden;padding-top:var(--header-h)}.hero::before{content:'';position:absolute;inset:0;background-image:radial-gradient(circle at 20% 50%,rgba(0,168,232,0.15) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,255,255,0.05) 0%,transparent 50%),radial-gradient(circle at 50% 80%,rgba(0,102,204,0.2) 0%,transparent 50%)}.hero::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%)}.hero-content{position:relative;z-index:2;text-align:center;padding:2rem;max-width:900px}.hero-badge{display:inline-flex;align-items:center;gap:0.5rem;background:rgba(255,255,255,0.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.2);padding:0.5rem 1.5rem;border-radius:var(--radius-full);color:rgba(255,255,255,0.9);font-size:0.9rem;font-weight:500;margin-bottom:2rem}.hero-badge .dot{width:8px;height:8px;background:var(--success);border-radius:50%;display:inline-block;margin-right:6px}.hero h1{color:var(--white);margin-bottom:1.2rem}.hero p{font-size:1.1rem;color:rgba(255,255,255,0.75);max-width:650px;margin:0 auto 2.5rem}.hero .btns{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.85rem 2rem;border-radius:var(--radius-full);font-weight:600;font-size:1rem;transition:var(--transition);cursor:pointer;border:none;text-decoration:none}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 20px rgba(0,168,232,0.35)}.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,168,232,0.45);color:#fff}.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.3)}.btn-outline:hover{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.5);transform:translateY(-2px)}.hero-stats{display:flex;justify-content:center;gap:3rem;margin-top:3.5rem}.hero-stat{text-align:center}.hero-stat .number{font-size:2.2rem;font-weight:800;color:#fff}.hero-stat .label{font-size:0.85rem;color:rgba(255,255,255,0.6);font-weight:500}.section{padding:5rem 2rem}.section-alt{background:linear-gradient(180deg,#EBF2FA 0%,#F5F3F0 100%)}.section-inner{max-width:var(--max-width);margin:0 auto}.section h2{text-align:center;margin-bottom:0.8rem;position:relative}.section h2::after{content:'';display:block;width:60px;height:3px;background:var(--accent);margin:12px auto 0;border-radius:2px}.section-label{display:inline-block;padding:0.35rem 1.2rem;background:var(--primary-50);color:var(--primary);font-size:0.85rem;font-weight:600;border-radius:var(--radius-full);letter-spacing:0.05em;margin-bottom:0.8rem}.section .subtitle{text-align:center;color:var(--gray-500);max-width:600px;margin:0 auto 3.5rem;font-size:1.05rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.2rem}.card{background:var(--white);border-radius:var(--radius-lg);padding:1.8rem;border:1px solid var(--gray-200);transition:var(--transition);text-decoration:none;color:inherit;position:relative;overflow:hidden}.card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transition:transform 0.3s ease}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--primary-light)}.card:hover::before{transform:scaleX(1)}.card .icon{font-size:2rem;margin-bottom:0.8rem}.card h3{font-size:1.1rem;margin-bottom:0.5rem;color:var(--gray-900)}.card p{color:var(--gray-500);font-size:0.88rem;line-height:1.6}.card .tag{display:inline-block;padding:3px 10px;background:var(--primary-50);border-radius:var(--radius-full);font-size:0.75rem;color:var(--primary);margin-top:12px;font-weight:600}.tech-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.5rem}.tech-card{background:var(--white);border-radius:var(--radius-lg);padding:1.8rem;border:1px solid var(--gray-200);display:flex;gap:1.2rem;align-items:flex-start;transition:var(--transition)}.tech-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-light)}.tech-card .num{font-size:2.5rem;font-weight:900;color:var(--primary-50);line-height:1;min-width:44px}.tech-card h3{font-size:1.05rem;color:var(--gray-900);margin-bottom:6px}.tech-card p{font-size:0.9rem;color:var(--gray-500)}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.case-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--gray-200);transition:var(--transition)}.case-card:hover{box-shadow:var(--shadow-xl)}.case-card .img{height:180px;background:linear-gradient(135deg,var(--primary-50),#DBEAFE);display:flex;align-items:center;justify-content:center;font-size:1.6rem}.case-card .info{padding:1.5rem}.case-card h3{font-size:0.9rem;margin-bottom:4px}.case-card .detail{font-size:0.78rem;color:var(--gray-500)}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;margin:2rem 0}.stat-item{text-align:center;padding:2rem 1rem;background:linear-gradient(135deg,#EBF2FA,#fff);border-radius:var(--radius-lg);border:1px solid var(--primary-50)}.stat-item .num{font-size:2.2rem;font-weight:900;color:var(--primary)}.stat-item .label{font-size:0.85rem;color:var(--gray-500);margin-top:6px}.client-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem}.client-item{background:var(--white);border-radius:var(--radius);padding:1.5rem 1rem;text-align:center;border:1px solid var(--gray-200);font-weight:600;color:var(--gray-500);transition:var(--transition)}.client-item:hover{box-shadow:var(--shadow-md);color:var(--primary);border-color:var(--primary-light)}.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem}.cert-card{text-align:center;padding:2rem 1.5rem;background:var(--white);border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:var(--transition)}.cert-card:hover{box-shadow:var(--shadow-lg)}.cert-card .icon{font-size:2.5rem;margin-bottom:12px}.cert-card h3{font-size:1rem;color:var(--gray-900)}.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}.contact-info h3{margin-bottom:1.5rem;font-size:1.3rem}.contact-info .item{display:flex;gap:0.8rem;align-items:flex-start;margin-bottom:1.2rem}.contact-info .item .icon{font-size:1.3rem;min-width:28px}.contact-info .item strong{display:block;font-size:0.85rem;color:var(--gray-500)}.contact-info .item p{color:var(--gray-700)}.contact-form input,.contact-form textarea{width:100%;padding:0.85rem 1.2rem;border:1.5px solid var(--gray-200);border-radius:var(--radius);font-size:1rem;margin-bottom:1rem;font-family:inherit;transition:border 0.2s;background:var(--white)}.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary)}.contact-form textarea{height:130px;resize:vertical}.contact-form button{width:100%;padding:0.85rem 2.5rem;min-height:44px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-full);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);box-shadow:0 4px 20px rgba(0,168,232,0.35)}.contact-form button:hover{background:var(--accent-dark);transform:translateY(-2px)}.floating-contact{position:fixed;bottom:calc(5.5rem + 52px + 12px);right:2rem;z-index:998}.floating-contact .fc-trigger{width:52px;height:52px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;font-size:1.4rem;box-shadow:var(--shadow-xl);transition:var(--transition);display:flex;align-items:center;justify-content:center;animation:pulse-ring 2s ease-in-out infinite;text-decoration:none}@keyframes pulse-ring{0%,100%{box-shadow:0 0 0 0 rgba(0,102,204,0.6),0 0 0 0 rgba(0,168,232,0.4)}50%{box-shadow:0 0 0 18px rgba(0,102,204,0),0 0 0 8px rgba(0,168,232,0)}}

 @keyframes icon-pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.12)}}.floating-contact .fc-trigger img{animation:icon-pulse 2s ease-in-out infinite}.floating-contact .fc-trigger:hover{background:var(--accent);transform:scale(1.12) rotate(8deg);box-shadow:0 8px 30px rgba(0,168,232,0.5)}.floating-contact .fc-panel{position:absolute;bottom:64px;right:0;width:300px;background:var(--white);border-radius:var(--radius-lg);box-shadow:0 25px 50px rgba(0,0,0,0.25);border:1px solid var(--gray-200);overflow:hidden;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--transition)}.floating-contact .fc-panel.show{opacity:1;visibility:visible;transform:translateY(0)}.fc-panel-header{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;padding:1.2rem 1.5rem;text-align:center}.fc-panel-header h4{font-size:1rem;margin-bottom:0.15rem}.fc-panel-header p{font-size:0.8rem;opacity:0.85}.fc-panel-body{padding:1.2rem 1.5rem}.fc-item{display:flex;align-items:center;gap:0.8rem;padding:0.7rem 0;border-bottom:1px solid var(--gray-100);text-decoration:none;color:inherit;transition:var(--transition)}.fc-item:last-child{border-bottom:none}.fc-item:hover{color:var(--primary)}.fc-item .fc-icon{font-size:1.3rem;flex-shrink:0}.fc-item h5{font-size:0.85rem;margin-bottom:0.05rem}.fc-item p{font-size:0.78rem;color:var(--gray-500)}.back-to-top{position:fixed;bottom:5.5rem;right:2rem;z-index:997;width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border:none;cursor:pointer;font-size:1.4rem;box-shadow:0 4px 20px rgba(0,102,204,0.4);transition:all 0.3s cubic-bezier(0.4,0,0.2,1);display:flex;align-items:center;justify-content:center;text-decoration:none;animation:float-arrow 2.5s ease-in-out infinite;opacity:0;transform:translateY(20px) scale(0.8);visibility:hidden}.back-to-top.show{opacity:1;transform:translateY(0) scale(1);visibility:visible}.back-to-top:hover{background:linear-gradient(135deg,var(--accent),var(--primary-dark));transform:translateY(-4px) scale(1.1);box-shadow:0 8px 30px rgba(0,168,232,0.55)} @keyframes float-arrow{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}.page-header{background:linear-gradient(135deg,#1A2436 0%,#243550 35%,#1E4060 65%,#1A5A8A 100%);color:#fff;padding:5rem 2rem 3.5rem;text-align:center;position:relative}.page-header h1{color:var(--white);font-size:2.2rem;margin-bottom:0.5rem}.page-header p{opacity:0.8;font-size:1.05rem}.about-content{max-width:850px;margin:0 auto}.about-content p{margin-bottom:1.2rem;color:var(--gray-600);font-size:1.02rem;line-height:1.8}.cta-section{background:linear-gradient(135deg,#1A2436 0%,#243550 35%,#1E4060 65%,#1A5A8A 100%);color:#fff;text-align:center;padding:4rem 2rem}.cta-section h2{color:#fff}.cta-section h2::after{background:rgba(255,255,255,0.5)}.cta-section p{color:rgba(255,255,255,0.85);max-width:600px;margin:0 auto 2rem;font-size:1.05rem}.footer{background:#1E252E;color:rgba(255,255,255,0.7);padding:4rem 2rem 2rem}.footer-grid{max-width:var(--max-width);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2.5rem;margin-bottom:2.5rem}.footer h4{color:#fff;margin-bottom:1rem;font-size:1rem}.footer p,.footer a{font-size:0.9rem;color:rgba(255,255,255,0.6);line-height:2}.footer a{text-decoration:none;display:block}.footer a:hover{color:var(--accent)}.footer-bottom{max-width:var(--max-width);margin:0 auto;padding-top:2rem;border-top:1px solid rgba(255,255,255,0.1);text-align:center;font-size:0.85rem;color:rgba(255,255,255,0.5);display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:0.25rem 0.5rem}.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;z-index:1001;width:44px;height:44px;justify-content:center;align-items:center;padding:9px;background:none;border:none}.hamburger span{display:block;width:26px;height:2.5px;background:var(--gray-800);border-radius:2px;transition:var(--transition)}.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.hamburger.active span:nth-child(2){opacity:0}.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.mobile-nav{display:none;position:fixed;top:56px;left:0;right:0;bottom:0;background:var(--white);z-index:999;padding:1.5rem 1rem;overflow-y:auto}@media(max-width:768px){.mobile-nav{top:56px}}.mobile-nav.open{display:block}.mobile-nav a{display:block;padding:1rem 0;font-size:1.1rem;font-weight:600;color:var(--gray-700);border-bottom:1px solid var(--gray-200);text-decoration:none}.mobile-nav a:hover{color:var(--primary)}.mobile-nav .nav-cta{margin-top:1rem;text-align:center;background:var(--primary);color:#fff!important;border-radius:var(--radius-full);border:none;padding:0.85rem!important}.nav-backdrop{position:fixed;inset:0;background:rgba(0,0,0,0.4);z-index:998;opacity:0;visibility:hidden;transition:opacity 0.3s ease}.nav-open .nav-backdrop{opacity:1;visibility:visible}.hero-divider{width:1px;background:rgba(255,255,255,0.2);align-self:stretch}@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr}.stat-grid{grid-template-columns:1fr 1fr}.contact-wrap{grid-template-columns:1fr}.hero-stats{gap:2rem}}@media(max-width:768px){.topbar{background:#FCFBF9!important;height:56px}.topbar-inner{padding:0 0.8rem;height:56px}.topbar .logo img{height:32px!important}.topbar .logo>div{font-size:0.75rem!important}.topbar .logo small{font-size:0.6rem!important;line-height:1.1}.main-nav{display:none}.hamburger{display:flex;margin-left:0;min-width:44px;min-height:44px}.hamburger span{width:22px;height:2px}.lang-switch a{padding:5px 10px;font-size:0.78rem}.lang-switch{gap:1px;padding:2px}body{padding-top:56px}.hero{min-height:70vh;min-height:70dvh;padding:3rem 1rem 2rem}.hero h1{font-size:1.7rem}.hero p{font-size:1rem}.section{padding:3rem 1rem}.section h2{font-size:1.6rem}.tech-grid{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.footer-grid{grid-template-columns:1fr;gap:1.8rem}.stat-grid{grid-template-columns:1fr 1fr}.hero-stats{flex-direction:column;gap:1rem;margin-top:2rem}.footer-bottom{font-size:0.8rem}html{font-size:15px}}@media(max-width:480px){html{font-size:14px}.hero h1{font-size:1.4rem}.stat-grid{grid-template-columns:1fr}.card-grid{grid-template-columns:1fr}.lang-switch a{padding:5px 10px;font-size:0.8rem}.hero-divider{display:none}.hero-stats{gap:1rem}.floating-contact{bottom:calc(4rem + 44px + 10px);right:0.5rem}.floating-contact .fc-trigger{width:44px;height:44px}.floating-contact .fc-panel{width:260px}.back-to-top{right:0.5rem;bottom:4rem;width:44px;height:44px;font-size:1rem}.back-to-top.show{opacity:1;transform:translateY(0) scale(1);visibility:visible}.contact-form input,.contact-form textarea{font-size:16px}.footer-bottom{font-size:0.75rem;gap:0.15rem 0.4rem;padding:1.5rem 0.5rem 1rem}}a,button,.btn,.fc-trigger,.fc-item,.hamburger,.lang-switch a,.card,.case-card{-webkit-tap-highlight-color:transparent;touch-action:manipulation}@media(max-width:768px){.hamburger,.main-nav a,.mobile-nav a,.lang-switch a,.btn,.fc-item,.contact-form button{min-height:44px;display:flex;align-items:center}.lang-switch a{padding:8px 16px}.hero-badge{font-size:0.8rem;padding:0.4rem 1rem}body{-webkit-text-size-adjust:100%}}@supports not (backdrop-filter:blur(1px)){.topbar{background:#FCFBF9}.hero-badge{background:rgba(30,36,46,0.5)}}@media(max-width:768px){.topbar{background:#FCFBF9}.hero-badge{background:rgba(30,36,46,0.5)}}
/* ====== Mobile Fixes ====== */
@media(max-width:768px){
    /* Fix: scroll-padding-top should match mobile header height */
    html{scroll-padding-top:64px}
    /* Fix: reduce page-header padding on mobile */
    .page-header{padding:3.5rem 1rem 2.5rem}
    /* Fix: iOS background-attachment:fixed performance */
    body{background-attachment:scroll}
    /* Fix: prevent body scroll when mobile nav open */
    body.nav-open{overflow:hidden}
}
@media(max-width:480px){
    /* Fix: tighter section padding on small screens */
    .section{padding:2.5rem 0.8rem}
    /* Fix: reduce page-header further */
    .page-header{padding:3rem 1rem 2rem}
    .page-header h1{font-size:1.6rem}
    .page-header p{font-size:0.95rem}
}
/* Fix: tablet nav overflow (768-950px) */
@media(min-width:769px) and (max-width:950px){
    .main-nav{gap:1rem}
    .main-nav a{font-size:0.8rem}
    .lang-switch a{padding:4px 10px;font-size:0.75rem}
    .topbar-inner{padding:0 0.8rem}
    .topbar .logo img{height:34px!important}
}