:root {
    --primary: #0072EF;
    --primary-dark: #0056CC;
    --primary-light: #3399FF;
    --bg-dark: #1A2332;
    --bg-darker: #0d1321;
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --text-muted: #64748B;
    --border-color: rgba(255,255,255,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Animations ===== */
@keyframes fadeInUp { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

.animate-on-scroll { opacity:0; transform:translateY(30px); transition: all 0.6s ease-out; }
.animate-on-scroll.visible { opacity:1; transform:translateY(0); }
.stagger-1 { transition-delay:0.1s; } .stagger-2 { transition-delay:0.2s; }
.stagger-3 { transition-delay:0.3s; } .stagger-4 { transition-delay:0.4s; }
.stagger-5 { transition-delay:0.5s; } .stagger-6 { transition-delay:0.6s; }

/* ===== Header ===== */
header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    transition: all 0.3s ease; padding: 1rem 0;
    background: var(--bg-dark);
}
header.scrolled {
    background: rgba(26,35,50,0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    border-bottom: 1px solid var(--border-color);
}
.header-inner {
    max-width: 1280px; margin: 0 auto; padding: 0 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    height: 4rem;
}
.logo { display: inline-block; text-decoration: none; line-height: 0; }
.logo img { height: 2.5rem; width: auto; transition: transform 0.3s; }
.logo:hover img { transform: scale(1.05); }

/* Desktop Nav */
.desktop-nav { display: none; align-items: center; gap: 0.125rem; }
@media (min-width: 1280px) { .desktop-nav { display: flex; } }
.desktop-nav a {
    display: flex; align-items: center; gap: 0.375rem;
    color: #D1D5DB; text-decoration: none;
    font-size: 0.875rem; font-weight: 500;
    padding: 0.5rem 0.75rem; border-radius: 6px;
    transition: all 0.2s; white-space: nowrap;
}
.desktop-nav a:hover { color: white; background: rgba(255,255,255,0.1); }
.desktop-nav a.active { color: var(--primary); background: rgba(255,255,255,0.05); }
.desktop-nav a svg { width: 1rem; height: 1rem; }

.mobile-menu-btn { display: block; background: none; border: none; color: var(--text-primary); cursor: pointer; padding: 0.5rem; }
@media (min-width: 1280px) { .mobile-menu-btn { display: none; } }

/* ===== Mobile Menu ===== */
.mobile-menu {
    display: none; position: fixed; inset: 0;
    background: rgba(26,35,50,0.98); z-index: 999;
    padding: 5rem 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
    overflow-y: auto;
}
.mobile-menu.active { opacity: 1; pointer-events: auto; }
.mobile-menu nav { display: flex; flex-direction: column; gap: 0.125rem; max-width: 1280px; margin: 0 auto; padding: 0; }
.mobile-menu a {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.875rem 1rem; font-size: 1rem;
    color: var(--text-secondary); text-decoration: none;
    border-radius: 8px; transition: all 0.2s;
}
.mobile-menu a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.mobile-close {
    position: absolute; top: 1rem; right: 1rem;
    background: none; border: none; color: var(--text-primary);
    cursor: pointer; padding: 0.5rem;
}
.mobile-close svg { width: 1.5rem; height: 1.5rem; }

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 8rem 2rem 4rem; overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2332 50%, var(--bg-darker) 100%);
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0,114,239,0.1) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 900px; animation: fadeInUp 1s ease-out; }
.hero h1 { font-family: 'Space Grotesk','Noto Sans SC',sans-serif; font-size: clamp(2rem,5vw,3.75rem); font-weight: 700; line-height: 1.1; margin-bottom: 1.5rem; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: clamp(1rem,2vw,1.25rem); color: #D1D5DB; max-width: 700px; margin: 0 auto 2.5rem; line-height: 1.8; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(to right, transparent, rgba(0,114,239,0.5), transparent);
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 1rem; background: rgba(0,114,239,0.2); color: var(--primary);
    font-size: 0.875rem; font-weight: 500; border-radius: 100px; margin-bottom: 1.25rem;
}
.hero-badge svg { width: 1rem; height: 1rem; }
.hero-content .hero-eyebrow { color: var(--primary); font-size: 0.875rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 2rem; font-size: 1rem; font-weight: 500;
    text-decoration: none; border-radius: 10px; transition: all 0.3s;
    cursor: pointer; border: none;
}
.btn svg { width: 1.25rem; height: 1.25rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,114,239,0.3); }
.btn-outline { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.05); transform: translateY(-2px); }
.btn-dark { background: var(--bg-dark); color: white; border: 2px solid #111827; }
.btn-dark:hover { background: #111827; color: white; transform: translateY(-2px); }

/* ===== Sections ===== */
.section { padding: 5rem 2rem; }
@media (min-width: 768px) { .section { padding: 7rem 2rem; } }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { font-size: clamp(1.75rem,3.5vw,2.25rem); font-weight: 700; margin-bottom: 0.75rem; }
.section-header p { font-size: 1.125rem; color: #6B7280; max-width: 600px; margin: 0 auto; }
.section-light { background: #fff; }
.section-gray { background: #F9FAFB; }
.section-dark { background: var(--bg-dark); }

/* ===== Tech Cards ===== */
.tech-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .tech-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px) { .tech-grid { grid-template-columns: repeat(4,1fr); gap: 2rem; } }
.tech-card {
    position: relative; padding: 1.75rem;
    background: #F9FAFB; border-radius: 14px;
    transition: all 0.35s; border: 1px solid #E5E7EB;
}
.tech-card:hover { background: white; box-shadow: 0 10px 40px rgba(0,0,0,0.08); border-color: rgba(0,114,239,0.2); }
.tech-card-header { display: flex; align-items: start; justify-content: space-between; margin-bottom: 1rem; }
.tech-card-icon {
    width: 3.5rem; height: 3.5rem; display: flex; align-items: center; justify-content: center;
    background: rgba(0,114,239,0.1); border-radius: 12px; color: var(--primary);
    transition: all 0.35s; flex-shrink: 0;
}
.tech-card:hover .tech-card-icon { background: var(--primary); color: white; }
.tech-card-icon svg { width: 1.75rem; height: 1.75rem; }
.tech-card-number { font-family: 'Space Grotesk',sans-serif; font-size: 2rem; font-weight: 700; color: #E5E7EB; transition: color 0.3s; }
.tech-card:hover .tech-card-number { color: rgba(0,114,239,0.3); }
.tech-card h3 { font-size: 1.125rem; font-weight: 600; color: #111827; margin-bottom: 0.5rem; transition: color 0.3s; }
.tech-card:hover h3 { color: var(--primary); }
.tech-card p { font-size: 0.875rem; color: #6B7280; line-height: 1.7; }
.tech-card-link { display: inline-flex; align-items: center; gap: 0.25rem; margin-top: 1rem; color: var(--primary); font-size: 0.875rem; font-weight: 500; opacity: 0; transition: opacity 0.3s; }
.tech-card:hover .tech-card-link { opacity: 1; }
.tech-card-link svg { width: 1rem; height: 1rem; }

/* ===== Stats ===== */
.stats { padding: 4rem 2rem; background: var(--bg-dark); }
.stats-grid { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
@media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4,1fr); } }
.stat-item { text-align: center; padding: 1.5rem; }
.stat-value { font-family: 'Space Grotesk',sans-serif; font-size: clamp(2rem,4vw,2.75rem); font-weight: 700; color: var(--primary); line-height: 1; margin-bottom: 0.5rem; }
.stat-label { font-size: 0.875rem; color: #9CA3AF; }

/* ===== Product Cards ===== */
.products-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .products-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px) { .products-grid { grid-template-columns: repeat(3,1fr); } }
.product-card {
    background: white; border-radius: 16px; overflow: hidden;
    transition: all 0.35s; border: 1px solid #E5E7EB; text-decoration: none; display: block;
}
.product-card:hover { box-shadow: 0 20px 50px rgba(0,0,0,0.1); transform: translateY(-8px); }
.product-image { aspect-ratio: 1; background: #F3F4F6; overflow: hidden; position: relative; }
.product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.product-card:hover .product-image img { transform: scale(1.05); }
.product-badge { position: absolute; top: 1rem; right: 1rem; padding: 0.25rem 0.75rem; background: var(--primary); color: white; font-size: 0.75rem; font-weight: 500; border-radius: 100px; }
.product-info { padding: 1.5rem; }
.product-info h3 { font-size: 1.125rem; font-weight: 600; color: #111827; margin-bottom: 0.5rem; transition: color 0.3s; }
.product-card:hover .product-info h3 { color: var(--primary); }
.product-info p { font-size: 0.875rem; color: #6B7280; }

/* ===== SmartGo ===== */
.smartgo-grid { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
@media (min-width: 1024px) { .smartgo-grid { grid-template-columns: 1fr 1fr; gap: 4rem; } }
.smartgo-tag { display: inline-block; padding: 0.5rem 1rem; background: rgba(0,114,239,0.1); color: var(--primary); font-size: 0.875rem; font-weight: 500; border-radius: 100px; margin-bottom: 1.25rem; }
.smartgo h2 { font-size: clamp(1.75rem,3.5vw,2.25rem); font-weight: 700; margin-bottom: 1.25rem; color: #111827; }
.smartgo h2 span { color: var(--primary); }
.smartgo-desc { font-size: 1.0625rem; color: #6B7280; line-height: 1.8; margin-bottom: 1.75rem; }
.smartgo-features { list-style: none; margin-bottom: 2rem; }
.smartgo-features li { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.625rem 0; color: #374151; }
.smartgo-features li .check {
    width: 1.5rem; height: 1.5rem; background: rgba(0,114,239,0.1); color: var(--primary);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; margin-top: 0.125rem;
}
.smartgo-features li .check svg { width: 1rem; height: 1rem; }
.smartgo-image-wrapper { position: relative; border-radius: 16px; overflow: hidden; aspect-ratio: 4/3; background: linear-gradient(135deg, rgba(0,114,239,0.2), rgba(0,114,239,0.05)); }
.smartgo-image-wrapper img { width: 100%; height: 100%; object-fit: cover; }
.smartgo-image-wrapper::before {
    content: ''; position: absolute; bottom: -1.5rem; right: -1.5rem;
    width: 12rem; height: 12rem; background: rgba(0,114,239,0.1); border-radius: 50%; filter: blur(80px);
}
.smartgo-image-wrapper::after {
    content: ''; position: absolute; top: -1.5rem; left: -1.5rem;
    width: 8rem; height: 8rem; background: rgba(0,114,239,0.05); border-radius: 50%; filter: blur(60px);
}

/* ===== Application Cards ===== */
.apps-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .apps-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px) { .apps-grid { grid-template-columns: repeat(4,1fr); } }
.app-card {
    background: white; border-radius: 14px; overflow: hidden;
    transition: all 0.35s; border: 1px solid #E5E7EB; text-decoration: none; display: block;
}
.app-card:hover { box-shadow: 0 15px 40px rgba(0,0,0,0.1); transform: translateY(-6px); }
.app-image { aspect-ratio: 4/3; overflow: hidden; }
.app-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.app-card:hover .app-image img { transform: scale(1.05); }
.app-info { padding: 1.25rem; }
.app-info h3 { font-size: 1.0625rem; font-weight: 600; color: #111827; margin-bottom: 0.375rem; transition: color 0.3s; }
.app-card:hover .app-info h3 { color: var(--primary); }
.app-info p { font-size: 0.875rem; color: #6B7280; }

/* ===== CTA ===== */
.cta { background: var(--bg-dark); text-align: center; }
.cta-content { max-width: 700px; margin: 0 auto; }
.cta h2 { font-size: clamp(1.75rem,3.5vw,2.25rem); font-weight: 700; margin-bottom: 1rem; }
.cta p { font-size: 1.0625rem; color: #D1D5DB; margin-bottom: 2rem; line-height: 1.8; }
.cta-card {
    position: relative; overflow: hidden;
    background: linear-gradient(135deg, rgba(0,114,239,0.2), var(--bg-dark), rgba(0,114,239,0.1));
    border: 1px solid rgba(0,114,239,0.2);
    border-radius: 16px; padding: 4rem 2rem;
}
.cta-card::before {
    content: ''; position: absolute; top: -4rem; right: -4rem;
    width: 16rem; height: 16rem; border-radius: 50%;
    background: rgba(0,114,239,0.1); filter: blur(80px);
}
.cta-card > * { position: relative; }
.cta-card h2 { font-size: clamp(1.5rem,3.5vw,2.25rem); font-weight: 700; margin-bottom: 1rem; }
.cta-card p { font-size: 1.0625rem; color: #9CA3AF; margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; line-height: 1.8; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
footer { padding: 3.5rem 2rem 2rem; background: var(--bg-darker); border-top: 1px solid var(--border-color); }
.footer-inner { max-width: 1280px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2.5rem; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr repeat(4,1fr); } }
.footer-logo img { height: 2.5rem; width: auto; margin-bottom: 1rem; }
.footer-brand > p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.8; max-width: 380px; margin-bottom: 1.25rem; }
.footer-contact { font-size: 0.8125rem; color: var(--text-secondary); line-height: 2; }
.footer-contact i { display: inline-block; width: 1.25rem; color: var(--primary); margin-right: 0.25rem; text-align: center; font-style: normal; }
.footer-column h4 { font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-primary); margin-bottom: 1rem; }
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 0.625rem; }
.footer-column ul li a { color: var(--text-secondary); text-decoration: none; font-size: 0.8125rem; transition: color 0.2s; }
.footer-column ul li a:hover { color: var(--primary-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 1.5rem; border-top: 1px solid var(--border-color); flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { font-size: 0.75rem; color: var(--text-muted); }
.footer-social { display: flex; gap: 0.5rem; }
.footer-social a { width: 2.25rem; height: 2.25rem; display: flex; align-items: center; justify-content: center; color: var(--text-muted); border-radius: 8px; transition: all 0.3s; text-decoration: none; }
.footer-social a:hover { color: var(--primary); background: rgba(0,114,239,0.1); }
.footer-social a svg { width: 1.125rem; height: 1.125rem; }

/* ===== Technology Detail Sections ===== */
.tech-detail { padding: 5rem 2rem; background: #fff; }
@media (min-width: 768px) { .tech-detail { padding: 7rem 2rem; } }
.tech-detail-inner { max-width: 1280px; margin: 0 auto; }
.tech-detail-grid { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
@media (min-width: 1024px) { .tech-detail-grid { grid-template-columns: 1fr 1fr; gap: 4rem; } }
.tech-detail-grid.reverse .tech-detail-content { order: 2; }
.tech-detail-grid.reverse .tech-detail-specs { order: 1; }
.tech-detail-icon {
    display: inline-flex; padding: 0.75rem; background: rgba(0,114,239,0.1);
    border-radius: 8px; color: var(--primary); margin-bottom: 1.25rem;
}
.tech-detail-icon svg { width: 2rem; height: 2rem; }
.tech-detail-content h2 { font-size: clamp(1.5rem,3vw,1.875rem); font-weight: 700; color: #111827; margin-bottom: 0.75rem; }
.tech-detail-subtitle { font-size: 1.125rem; color: var(--primary); font-weight: 500; margin-bottom: 1rem; }
.tech-detail-content p { font-size: 1rem; color: #6B7280; line-height: 1.8; margin-bottom: 1.5rem; }
.tech-detail-link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--primary); font-weight: 500; text-decoration: none; transition: gap 0.3s; }
.tech-detail-link:hover { gap: 0.75rem; }
.tech-detail-link svg { width: 1rem; height: 1rem; }
.tech-specs-card {
    background: #F9FAFB; border-radius: 16px; padding: 2rem;
    border: 1px solid #E5E7EB;
}
.tech-specs-card h3 { font-size: 1.125rem; font-weight: 600; color: #111827; margin-bottom: 1.25rem; }
.tech-spec-item { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 0; border-bottom: 1px solid #E5E7EB; }
.tech-spec-item:last-child { border-bottom: none; }
.tech-spec-label { color: #6B7280; }
.tech-spec-value { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; color: #111827; }
.tech-spec-value svg { width: 1rem; height: 1rem; color: var(--primary); }

/* ===== Application Detail Sections ===== */
.app-detail { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
@media (min-width: 1024px) { .app-detail { grid-template-columns: 1fr 1fr; gap: 4rem; } }
.app-detail .app-detail-image { order: 2; }
@media (min-width: 1024px) { .app-detail.reverse .app-detail-image { order: -1; } }
.app-detail-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 3.5rem; height: 3.5rem; background: rgba(0,114,239,0.1);
    border-radius: 12px; color: var(--primary); margin-bottom: 1.25rem;
}
.app-detail-icon svg { width: 2rem; height: 2rem; }
.app-detail h2 { font-size: clamp(1.5rem,3vw,2rem); font-weight: 700; margin-bottom: 0.75rem; color: #111827; }
.app-detail-subtitle { font-size: 1.0625rem; color: var(--primary); font-weight: 500; margin-bottom: 1rem; }
.app-detail-desc { font-size: 1rem; color: #6B7280; line-height: 1.8; margin-bottom: 1.5rem; }
.app-detail-features { list-style: none; margin-bottom: 2rem; }
.app-detail-features li { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.5rem 0; color: #374151; }
.app-detail-features li .check {
    width: 1.25rem; height: 1.25rem; background: rgba(0,114,239,0.1); color: var(--primary);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; margin-top: 0.25rem;
}
.app-detail-features li .check svg { width: 0.75rem; height: 0.75rem; }
.app-detail-link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--primary); font-size: 0.9375rem; font-weight: 500; text-decoration: none; transition: gap 0.3s; }
.app-detail-link:hover { gap: 0.75rem; }
.app-detail-link svg { width: 1rem; height: 1rem; }
.app-detail-image-wrapper { position: relative; border-radius: 16px; overflow: hidden; aspect-ratio: 4/3; box-shadow: 0 20px 50px rgba(0,0,0,0.1); }
.app-detail-image-wrapper img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Filter Bar (Products) ===== */
.filter-bar { background: rgba(26,35,50,0.5); border-top: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05); padding: 1rem 2rem; }
.filter-bar-inner { max-width: 1280px; margin: 0 auto; display: flex; gap: 0.75rem; }
.filter-btn {
    padding: 0.5rem 1.25rem; border-radius: 100px; font-size: 0.875rem; font-weight: 500;
    border: none; cursor: pointer; transition: all 0.2s; color: #9CA3AF; background: transparent;
}
.filter-btn:hover { color: white; background: rgba(255,255,255,0.05); }
.filter-btn.active { background: var(--primary); color: white; box-shadow: 0 4px 20px rgba(0,114,239,0.25); }

/* ===== Product Cards (Dark) ===== */
.product-card-dark {
    position: relative;
    background: var(--bg-dark); border: 1px solid rgba(255,255,255,0.05);
    border-radius: 16px; overflow: hidden;
    transition: all 0.5s;
}
.product-card-dark::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(to right, var(--primary), transparent);
    opacity: 0; transition: opacity 0.5s;
}
.product-card-dark:hover { border-color: rgba(0,114,239,0.3); }
.product-card-dark:hover::before { opacity: 1; }
.product-card-content { padding: 1.75rem; }
.product-card-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 1.25rem; }
.product-card-header-left { display: flex; align-items: center; gap: 1rem; }
.product-card-icon {
    width: 3rem; height: 3rem; border-radius: 12px;
    background: rgba(0,114,239,0.1); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.product-card-icon svg { width: 1.5rem; height: 1.5rem; }
.product-card-title { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); }
.product-card-subtitle { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.125rem; }
.product-badge-featured {
    padding: 0.25rem 0.75rem; border-radius: 100px;
    font-size: 0.75rem; font-weight: 500;
    background: rgba(0,114,239,0.1); color: var(--primary);
    border: 1px solid rgba(0,114,239,0.2); white-space: nowrap;
}
.product-card-desc { font-size: 0.875rem; color: #9CA3AF; line-height: 1.75; margin-bottom: 1.5rem; }
.product-card-specs { display: grid; grid-template-columns: repeat(2,1fr); gap: 0.75rem; margin-bottom: 1.5rem; }
.spec-item {
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05);
    border-radius: 8px; padding: 0.75rem 1rem;
}
.spec-label { font-size: 0.75rem; color: #6B7280; margin-bottom: 0.25rem; }
.spec-value { font-size: 0.875rem; font-weight: 600; color: var(--text-primary); }
.product-card-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.product-tag {
    padding: 0.25rem 0.75rem; border-radius: 100px;
    font-size: 0.75rem; color: #9CA3AF;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05);
}
.product-card-link {
    display: inline-flex; align-items: center; gap: 0.5rem;
    color: var(--primary); font-size: 0.875rem; font-weight: 500;
    text-decoration: none; transition: gap 0.3s;
}
.product-card-link:hover { gap: 0.75rem; }
.product-card-link svg { width: 1rem; height: 1rem; }

/* ===== Why Choose Us Cards ===== */
.why-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .why-grid { grid-template-columns: repeat(3,1fr); } }
.why-card {
    background: var(--bg-dark); border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px; padding: 2rem; text-align: center;
    transition: all 0.3s;
}
.why-card:hover { border-color: rgba(0,114,239,0.2); }
.why-card-icon {
    width: 3.5rem; height: 3.5rem; border-radius: 12px;
    background: rgba(0,114,239,0.1); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.25rem;
}
.why-card-icon svg { width: 1.75rem; height: 1.75rem; }
.why-card h4 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.75rem; }
.why-card p { font-size: 0.875rem; color: #9CA3AF; line-height: 1.75; }

/* ===== Demo Note (SmartGo) ===== */
.demo-note { padding: 2rem; background: rgba(0,114,239,0.05); border-top: 1px solid rgba(0,114,239,0.2); }
.demo-note-inner { max-width: 896px; margin: 0 auto; }
.demo-note-box {
    display: flex; align-items: flex-start; gap: 1rem; padding: 1rem;
    background: rgba(255,255,255,0.05); border-radius: 12px; border: 1px solid rgba(0,114,239,0.2);
}
.demo-note-icon { width: 1.5rem; height: 1.5rem; color: var(--primary); flex-shrink: 0; margin-top: 0.125rem; }
.demo-note-box h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }
.demo-note-box p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== Feature Cards (SmartGo) ===== */
.feature-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .feature-grid { grid-template-columns: repeat(2,1fr); gap: 2rem; } }
.feature-card {
    background: #F9FAFB; border-radius: 14px; padding: 2rem;
    border: 1px solid #E5E7EB; transition: all 0.35s;
}
.feature-card:hover { background: white; box-shadow: 0 10px 40px rgba(0,0,0,0.08); border-color: rgba(0,114,239,0.2); }
.feature-icon {
    width: 3.5rem; height: 3.5rem; display: flex; align-items: center; justify-content: center;
    background: rgba(0,114,239,0.1); border-radius: 12px; color: var(--primary);
    margin-bottom: 1.5rem; transition: all 0.35s;
}
.feature-card:hover .feature-icon { background: var(--primary); color: white; }
.feature-icon svg { width: 2rem; height: 2rem; }
.feature-card h3 { font-size: 1.25rem; font-weight: 600; color: #111827; margin-bottom: 0.75rem; transition: color 0.3s; }
.feature-card:hover h3 { color: var(--primary); }
.feature-card p { font-size: 0.875rem; color: #6B7280; line-height: 1.7; margin-bottom: 1.5rem; }
.feature-specs { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.feature-spec {
    display: inline-flex; align-items: center; gap: 0.25rem;
    padding: 0.25rem 0.75rem; background: rgba(0,114,239,0.1); color: var(--primary);
    border-radius: 100px; font-size: 0.75rem; font-weight: 500;
}
.feature-spec svg { width: 0.75rem; height: 0.75rem; }

/* ===== Screenshot Cards (SmartGo) ===== */
.screenshot-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .screenshot-grid { grid-template-columns: repeat(3,1fr); } }
.screenshot-card {
    background: white; border-radius: 16px; overflow: hidden;
    border: 1px solid #E5E7EB; transition: all 0.35s;
}
.screenshot-card:hover { box-shadow: 0 15px 40px rgba(0,0,0,0.1); transform: translateY(-4px); }
.screenshot-image { aspect-ratio: 4/3; overflow: hidden; }
.screenshot-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.screenshot-card:hover .screenshot-image img { transform: scale(1.05); }
.screenshot-info { padding: 1.25rem; }
.screenshot-info h3 { font-size: 1.0625rem; font-weight: 600; color: #111827; margin-bottom: 0.25rem; }
.screenshot-info p { font-size: 0.875rem; color: #6B7280; }

/* ===== Tech Architecture (SmartGo) ===== */
.arch-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .arch-grid { grid-template-columns: repeat(4,1fr); } }
.arch-card {
    background: var(--bg-dark); border-radius: 12px; padding: 1.5rem;
    text-align: center; color: white; transition: all 0.35s;
}
.arch-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(0,0,0,0.3); }
.arch-step {
    font-family: 'Space Grotesk', sans-serif; font-size: 2.5rem; font-weight: 700;
    color: rgba(0,114,239,0.3); margin-bottom: 1rem; line-height: 1;
}
.arch-card h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; }
.arch-card p { font-size: 0.875rem; color: var(--text-secondary); }

/* ===== About Hero ===== */
.about-hero {
    position: relative; min-height: 70vh;
    display: flex; align-items: center; justify-content: center;
    padding: 8rem 2rem 4rem; overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2332 50%, var(--bg-darker) 100%);
}
.about-hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0,114,239,0.1) 0%, transparent 50%);
}
.about-hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; animation: fadeInUp 1s ease-out; }
.about-hero h1 { font-family: 'Space Grotesk','Noto Sans SC',sans-serif; font-size: clamp(2rem,5vw,3rem); font-weight: 700; line-height: 1.2; margin-bottom: 1.5rem; }
.about-hero h1 span { color: var(--primary); }
.about-hero p { font-size: clamp(1rem,2vw,1.25rem); color: #D1D5DB; line-height: 1.8; }

/* ===== Values Grid (About) ===== */
.values-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .values-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px) { .values-grid { grid-template-columns: repeat(3,1fr); } }
.value-card {
    position: relative; padding: 2rem;
    background: #F9FAFB; border-radius: 14px;
    transition: all 0.35s; border: 1px solid #E5E7EB;
}
.value-card:hover { background: white; box-shadow: 0 10px 40px rgba(0,0,0,0.08); border-color: rgba(0,114,239,0.2); }
.value-card-icon {
    width: 3.5rem; height: 3.5rem; display: flex; align-items: center; justify-content: center;
    background: rgba(0,114,239,0.1); border-radius: 12px; color: var(--primary);
    transition: all 0.35s; margin-bottom: 1.25rem;
}
.value-card:hover .value-card-icon { background: var(--primary); color: white; }
.value-card-icon svg { width: 1.75rem; height: 1.75rem; }
.value-card h3 { font-size: 1.125rem; font-weight: 600; color: #111827; margin-bottom: 0.5rem; transition: color 0.3s; }
.value-card:hover h3 { color: var(--primary); }
.value-card p { font-size: 0.875rem; color: #6B7280; line-height: 1.7; }

/* ===== About Content ===== */
.about-content-section { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: start; }
@media (min-width: 1024px) { .about-content-section { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.about-text h2 { font-size: clamp(1.5rem,3vw,2rem); font-weight: 700; color: #111827; margin-bottom: 1rem; }
.about-text h2 span { color: var(--primary); }
.about-text p { font-size: 1rem; color: #4B5563; line-height: 1.9; margin-bottom: 1rem; }
.about-image { border-radius: 16px; overflow: hidden; aspect-ratio: 4/3; background: linear-gradient(135deg, rgba(0,114,239,0.15), rgba(0,114,239,0.05)); }
.about-image img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Sensor Cards (About) ===== */
.sensor-intro-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .sensor-intro-grid { grid-template-columns: repeat(2,1fr); } }
.sensor-card {
    background: white; border-radius: 16px; overflow: hidden;
    border: 1px solid #E5E7EB; transition: all 0.35s;
}
.sensor-card:hover { box-shadow: 0 15px 40px rgba(0,0,0,0.08); border-color: rgba(0,114,239,0.2); }
.sensor-card-image { aspect-ratio: 16/9; overflow: hidden; background: #F3F4F6; }
.sensor-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.sensor-card:hover .sensor-card-image img { transform: scale(1.05); }
.sensor-card-body { padding: 2rem; }
.sensor-card-body h3 { font-size: 1.25rem; font-weight: 600; color: #111827; margin-bottom: 0.75rem; }
.sensor-card-body h3 span { color: var(--primary); }
.sensor-card-body p { font-size: 0.9375rem; color: #6B7280; line-height: 1.8; margin-bottom: 1rem; }
.sensor-specs { display: grid; grid-template-columns: repeat(2,1fr); gap: 0.75rem; margin-top: 1.25rem; }
.sensor-spec { padding: 0.75rem; background: #F9FAFB; border-radius: 8px; }
.sensor-spec-label { font-size: 0.75rem; color: #9CA3AF; margin-bottom: 0.25rem; }
.sensor-spec-value { font-size: 0.875rem; font-weight: 600; color: #111827; }

/* ===== Contact Info Cards ===== */
.contact-info-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .contact-info-grid { grid-template-columns: repeat(3,1fr); } }
.contact-info-card {
    background: #F9FAFB; border-radius: 14px; padding: 1.75rem;
    text-align: center; border: 1px solid #E5E7EB;
    transition: all 0.35s;
}
.contact-info-card:hover {
    background: white; border-color: rgba(0,114,239,0.2);
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}
.contact-info-icon {
    width: 3.5rem; height: 3.5rem; display: inline-flex;
    align-items: center; justify-content: center;
    background: rgba(0,114,239,0.1); border-radius: 12px;
    color: var(--primary); margin-bottom: 1rem;
}
.contact-info-icon svg { width: 1.75rem; height: 1.75rem; }
.contact-info-card h3 {
    font-size: 0.875rem; color: #6B7280; margin-bottom: 0.5rem;
    font-weight: 400;
}
.contact-info-card .info-main {
    font-size: 1.0625rem; font-weight: 600; color: #111827;
    margin-bottom: 0.375rem; line-height: 1.4;
}
.contact-info-card .info-sub {
    font-size: 0.8125rem; color: #9CA3AF;
}

/* ===== Contact Form Section ===== */
.contact-content-grid {
    display: grid; grid-template-columns: 1fr; gap: 2rem;
}
@media (min-width: 1024px) { .contact-content-grid { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.contact-form-card {
    background: white; border-radius: 16px; padding: 2rem;
    border: 1px solid #E5E7EB;
}
@media (min-width: 768px) { .contact-form-card { padding: 2.5rem; } }
.contact-form-card h2 {
    font-size: 1.5rem; font-weight: 700; color: #111827; margin-bottom: 0.5rem;
}
.contact-form-card .form-subtitle {
    font-size: 0.9375rem; color: #6B7280; margin-bottom: 2rem;
}

.form-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 640px) { .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; } }
.form-group { margin-bottom: 0; }
.form-group label {
    display: block; font-size: 0.875rem; font-weight: 500;
    color: #374151; margin-bottom: 0.5rem;
}
.form-group label .required { color: #EF4444; margin-left: 2px; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 0.75rem 1rem;
    background: #F9FAFB; border: 1px solid #E5E7EB;
    border-radius: 10px; font-size: 0.9375rem;
    color: #111827; font-family: inherit;
    transition: all 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,114,239,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #9CA3AF; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group .error-text {
    font-size: 0.75rem; color: #EF4444; margin-top: 0.375rem;
}
.char-counter {
    font-size: 0.75rem; color: #9CA3AF;
}
.char-counter.warning { color: #F59E0B; }
.char-counter.error { color: #EF4444; }

.form-submit-btn {
    width: 100%; display: inline-flex; align-items: center; justify-content: center;
    gap: 0.5rem; padding: 0.875rem 2rem; font-size: 1rem; font-weight: 500;
    background: var(--primary); color: white; border: none; border-radius: 10px;
    cursor: pointer; transition: all 0.3s; margin-top: 0.5rem;
}
.form-submit-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.form-submit-btn:disabled { background: #9CA3AF; cursor: not-allowed; transform: none; }
.form-submit-btn svg { width: 1.125rem; height: 1.125rem; }

/* Contact side info */
.contact-side-info { display: flex; flex-direction: column; gap: 1.5rem; }
.side-card {
    background: white; border-radius: 14px; padding: 1.5rem;
    border: 1px solid #E5E7EB;
}
.side-card-header { display: flex; align-items: flex-start; gap: 1rem; }
.side-card-icon {
    width: 3rem; height: 3rem; display: flex;
    align-items: center; justify-content: center;
    background: rgba(0,114,239,0.1); border-radius: 10px;
    color: var(--primary); flex-shrink: 0;
}
.side-card-icon svg { width: 1.5rem; height: 1.5rem; }
.side-card h3 { font-size: 1.0625rem; font-weight: 600; color: #111827; margin-bottom: 0.375rem; }
.side-card p { font-size: 0.875rem; color: #6B7280; line-height: 1.6; }
.side-card p + p { margin-top: 0.25rem; }

.map-placeholder {
    background: white; border-radius: 14px; overflow: hidden;
    border: 1px solid #E5E7EB;
}
.map-placeholder-inner {
    aspect-ratio: 16/9; background: #F3F4F6;
    display: flex; align-items: center; justify-content: center;
}
.map-placeholder-inner div { text-align: center; }
.map-placeholder-inner svg { width: 2.5rem; height: 2.5rem; color: #9CA3AF; margin-bottom: 0.75rem; }
.map-placeholder-inner p { font-size: 0.875rem; color: #6B7280; }
.map-placeholder-inner p + p { font-size: 0.75rem; color: #9CA3AF; margin-top: 0.25rem; }

/* Success message */
.success-message {
    display: none; text-align: center; padding: 3rem 1rem;
}
.success-message.show { display: block; }
.success-icon {
    width: 4rem; height: 4rem; margin: 0 auto 1.25rem;
    background: rgba(16,185,129,0.1); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #10B981;
}
.success-icon svg { width: 2rem; height: 2rem; }
.success-message h3 { font-size: 1.25rem; font-weight: 600; color: #111827; margin-bottom: 0.5rem; }
.success-message p { font-size: 0.9375rem; color: #6B7280; margin-bottom: 1.25rem; }
.success-message button {
    background: none; border: none; color: var(--primary);
    font-size: 0.9375rem; font-weight: 500; cursor: pointer;
    text-decoration: underline; font-family: inherit;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .section { padding: 3rem 1rem; }
    .hero { padding: 6rem 1rem 3rem; }
    .hero-buttons { flex-direction: column; }
    .btn { justify-content: center; width: 100%; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .tech-detail { padding: 3rem 1rem; }
    .tech-specs-card { padding: 1.25rem; }
    .product-card-specs { grid-template-columns: 1fr; }
    .cta-card { padding: 3rem 1.5rem; }
    .cta-buttons { flex-direction: column; }
    .about-hero { padding: 6rem 1rem 3rem; }
}