/* ========================================
   BRONRY Website - Main Stylesheet
   ======================================== */

/* CSS Variables */
:root {
    --color-primary: #0066FF;
    --color-primary-dark: #0052CC;
    --color-secondary: #00D4AA;
    --color-dark: #0A0A0A;
    --color-dark-light: #1A1A1A;
    --color-gray-900: #111111;
    --color-gray-800: #1F1F1F;
    --color-gray-700: #2D2D2D;
    --color-gray-600: #4A4A4A;
    --color-gray-500: #6B7280;
    --color-gray-400: #9CA3AF;
    --color-gray-300: #D1D5DB;
    --color-gray-200: #E5E7EB;
    --color-gray-100: #F3F4F6;
    --color-white: #FFFFFF;
    
    --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
    
    --container-max: 1280px;
    --header-height: 80px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

/* Logo */
.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-cn {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 2px;
}

.logo-en {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-400);
    letter-spacing: 3px;
}

/* Navigation */
.nav {
    display: flex;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-gray-300);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Language Switcher */
.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--color-white);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lang-current {
    font-weight: 600;
}

.lang-icon {
    width: 16px;
    height: 16px;
    transition: var(--transition-fast);
}

.lang-switcher.active .lang-icon {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--color-white);
    border-radius: 8px;
    box-shadow: var(--shadow-xl);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
}

.lang-switcher.active .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 6px;
    color: var(--color-gray-800);
    font-size: 14px;
    transition: var(--transition-fast);
}

.lang-option:hover {
    background: var(--color-gray-100);
}

.lang-option.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.lang-flag {
    font-size: 18px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-normal);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.hero-slider {
    position: relative;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease, visibility 1s ease;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.1);
    transition: transform 8s ease;
}

.hero-slide.active .hero-bg {
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: center;
}

.hero-text {
    max-width: 700px;
    color: var(--color-white);
}

.hero-subtitle {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.5s;
}

.hero-desc {
    font-size: 20px;
    font-weight: 300;
    color: var(--color-gray-300);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.hero-actions {
    display: flex;
    gap: 16px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.9s;
}

/* Hero Dots */
.hero-dots {
    position: absolute;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.hero-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transition: var(--transition-normal);
}

.hero-dot.active {
    background: var(--color-primary);
    transform: scale(1.2);
}

.hero-dot:hover {
    background: rgba(255,255,255,0.6);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 10;
}

.scroll-text {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-gray-400);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gray-400), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 102, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-dark);
    border-color: var(--color-white);
}

.btn-large {
    padding: 18px 48px;
    font-size: 17px;
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: 120px 0;
}

.section-dark {
    background: var(--color-dark);
    color: var(--color-white);
}

.section-header {
    margin-bottom: 64px;
}

.section-header.center {
    text-align: center;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.section-dark .section-label {
    color: var(--color-secondary);
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-dark .section-title {
    color: var(--color-white);
}

.section-desc {
    font-size: 18px;
    color: var(--color-gray-500);
    max-width: 600px;
}

.section-dark .section-desc {
    color: var(--color-gray-400);
}

.section-header.center .section-desc {
    margin: 0 auto;
}

/* ========================================
   About Section
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-img-wrapper {
    position: relative;
}

.about-img {
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
}

.about-img-decoration {
    position: absolute;
    top: 40px;
    left: 40px;
    right: -40px;
    bottom: -40px;
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    z-index: -1;
}

.about-content {
    padding-left: 20px;
}

.about-text {
    font-size: 17px;
    color: var(--color-gray-600);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin: 40px 0;
    padding: 30px 0;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--color-gray-500);
}

/* ========================================
   Business Section
   ======================================== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.business-card {
    background: var(--color-dark-light);
    border-radius: 12px;
    padding: 40px 30px;
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

.business-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.business-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 24px;
    color: var(--color-primary);
}

.business-icon svg {
    width: 32px;
    height: 32px;
}

.business-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
}

.business-desc {
    font-size: 15px;
    color: var(--color-gray-400);
    line-height: 1.7;
    margin-bottom: 20px;
}

.business-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.business-link:hover {
    color: var(--color-secondary);
}

/* ========================================
   Products Section
   ======================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--color-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--color-gray-200);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    aspect-ratio: 1/1;
    background: var(--color-gray-100);
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-content {
    padding: 12px;
}

.product-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 6px;
    line-height: 1.3;
}

.product-desc {
    font-size: 11px;
    color: var(--color-gray-500);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 产品卡片按钮样式 - 应用于所有产品卡片 */
.product-link,
.sensor-card .btn,
.sensor-card .sensor-btn,
.product-card .btn,
.category-card .btn {
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: var(--color-primary) !important;
    color: var(--color-white) !important;
    border: none !important;
    padding: 10px 20px !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    text-decoration: none !important;
    text-align: center !important;
    margin-top: 12px !important;
    box-shadow: 0 2px 4px rgba(0,102,255,0.2) !important;
    /* 完全移除hover效果，保持样式恒定 */
}

.product-link,
.sensor-card .sensor-btn {
    /* 继承上面的统一样式，只覆盖特定尺寸 */
    font-size: 12px !important;
    padding: 8px 16px !important;
    margin-top: 8px !important;
}

/* ========================================
   Technology Section
   ======================================== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.tech-card {
    background: var(--color-dark-light);
    border-radius: 12px;
    padding: 40px 30px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.tech-card:hover::before {
    transform: scaleX(1);
}

.tech-card:hover {
    background: var(--color-gray-800);
}

.tech-number {
    font-size: 48px;
    font-weight: 700;
    color: rgba(255,255,255,0.1);
    margin-bottom: 20px;
    line-height: 1;
}

.tech-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
}

.tech-desc {
    font-size: 15px;
    color: var(--color-gray-400);
    line-height: 1.7;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 100px 0;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 40px;
}

.cta .btn-primary {
    background: var(--color-white);
    color: var(--color-primary);
}

.cta .btn-primary:hover {
    background: var(--color-gray-100);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-dark);
    color: var(--color-gray-300);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 20px;
}

.footer-logo .logo-cn {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-white);
}

.footer-logo .logo-en {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-500);
}

.footer-desc {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 24px;
    color: var(--color-gray-400);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark-light);
    border-radius: 8px;
    color: var(--color-gray-400);
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 15px;
    color: var(--color-gray-400);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact li {
    font-size: 15px;
    color: var(--color-gray-400);
}

.footer-contact a {
    color: var(--color-gray-400);
}

.footer-contact a:hover {
    color: var(--color-primary);
}

.contact-label {
    color: var(--color-gray-500);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 40px;
    border-top: 1px solid var(--color-gray-800);
}

.copyright {
    font-size: 14px;
    color: var(--color-gray-500);
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-legal a {
    font-size: 14px;
    color: var(--color-gray-500);
}

.footer-legal a:hover {
    color: var(--color-primary);
}

.divider {
    color: var(--color-gray-700);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollLine {
    0%, 100% {
        transform: scaleY(1);
        transform-origin: top;
    }
    50% {
        transform: scaleY(0);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1200px) {
    .business-grid,
    .products-grid,
    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-dark);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid var(--color-gray-800);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-img-decoration {
        display: none;
    }
    
    .hero-title {
        font-size: 42px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .business-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .cta-title {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
}

/* ========================================
   Tech System Image
   ======================================== */
.tech-system-image {
    margin: 40px auto;
    text-align: center;
    max-width: 800px;
}

.tech-system-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Product Category Pages
   ======================================== */

/* Page Hero */
.page-hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-light) 100%);
    color: var(--color-white);
    text-align: center;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 18px;
    color: var(--color-gray-400);
    max-width: 600px;
    margin: 0 auto 24px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-gray-400);
}

.breadcrumb a {
    color: var(--color-gray-400);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb .separator {
    color: var(--color-gray-600);
}

.breadcrumb .current {
    color: var(--color-white);
}

/* Product Categories Navigation */
.product-categories {
    background: var(--color-gray-100);
    padding: 20px 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.categories-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.category-link {
    padding: 10px 20px;
    background: var(--color-white);
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-600);
    transition: all 0.3s ease;
    border: 1px solid var(--color-gray-200);
}

.category-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.category-link.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Sensor Products Grid */
.sensor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.sensor-card {
    background: var(--color-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--color-gray-200);
}

.sensor-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.sensor-image {
    aspect-ratio: 16/10;
    background: var(--color-gray-100);
    overflow: hidden;
}

.sensor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.sensor-card:hover .sensor-image img {
    transform: scale(1.05);
}

.sensor-content {
    padding: 24px;
}

.sensor-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 12px;
}

.sensor-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 12px;
    line-height: 1.4;
}

.sensor-desc {
    font-size: 14px;
    color: var(--color-gray-500);
    margin-bottom: 16px;
    line-height: 1.6;
}

.sensor-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 16px;
    background: var(--color-gray-100);
    border-radius: 8px;
    margin-bottom: 16px;
}

.spec-item {
    text-align: center;
}

.spec-label {
    display: block;
    font-size: 11px;
    color: var(--color-gray-400);
    margin-bottom: 4px;
}

.spec-value {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-gray-800);
}

/* Sensor Applications */
.sensor-applications .applications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.app-card {
    background: var(--color-dark-light);
    border-radius: 12px;
    padding: 40px 24px;
    text-align: center;
    transition: var(--transition-normal);
}

.app-card:hover {
    transform: translateY(-4px);
    background: var(--color-gray-700);
}

.app-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.app-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 8px;
}

.app-desc {
    font-size: 14px;
    color: var(--color-gray-400);
}

/* Responsive */
@media (max-width: 1024px) {
    .sensor-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sensor-applications .applications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 36px;
    }
    
    .categories-nav {
        gap: 8px;
    }
    
    .category-link {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .sensor-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-applications .applications-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-specs {
        grid-template-columns: 1fr;
        text-align: left;
    }
    
    .spec-item {
        text-align: left;
    }
}

/* ========================================
   E-Skin Product Page
   ======================================== */

/* Tech Features */
.tech-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--color-white);
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 14px;
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* Product Showcase */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-image {
    position: relative;
    aspect-ratio: 4/3;
    background: var(--color-dark-light);
    border-radius: 16px;
    overflow: hidden;
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-700);
    color: var(--color-gray-400);
}

.image-placeholder span {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 8px;
}

.image-placeholder p {
    font-size: 14px;
}

.showcase-content {
    color: var(--color-white);
}

.showcase-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
}

.showcase-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.showcase-desc {
    font-size: 16px;
    color: var(--color-gray-400);
    line-height: 1.7;
    margin-bottom: 32px;
}

.specs-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-white);
}

.specs-list {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 32px;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-name {
    color: var(--color-gray-400);
    font-size: 14px;
}

.spec-value {
    color: var(--color-white);
    font-size: 14px;
    font-weight: 500;
}

.showcase-actions {
    display: flex;
    gap: 16px;
}

/* Light Theme App Cards */
.app-card-light {
    background: var(--color-white);
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition-normal);
}

.app-card-light:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* Coming Soon */
.coming-soon-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.coming-soon-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    border: 1px dashed rgba(255, 255, 255, 0.2);
}

.coming-soon-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.coming-soon-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 8px;
}

.coming-soon-desc {
    font-size: 14px;
    color: var(--color-gray-400);
    margin-bottom: 16px;
}

.coming-soon-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-gray-400);
    font-size: 12px;
    border-radius: 20px;
}

/* Responsive */
@media (max-width: 1024px) {
    .tech-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .coming-soon-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .tech-features {
        grid-template-columns: 1fr;
    }
    
    .showcase-title {
        font-size: 24px;
    }
    
    .showcase-actions {
        flex-direction: column;
    }
    
    .coming-soon-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Fix: Product Buttons - Force visible style
   ======================================== */
.product-card .product-content .product-link {
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: #0066FF !important;
    color: #FFFFFF !important;
    border: none !important;
    padding: 8px 16px !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
    font-size: 12px !important;
    text-decoration: none !important;
    text-align: center !important;
    margin-top: 8px !important;
    box-shadow: 0 2px 4px rgba(0,102,255,0.2) !important;
}

.sensor-card .sensor-btn {
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: #0066FF !important;
    color: #FFFFFF !important;
    border: none !important;
    padding: 8px 16px !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
    font-size: 12px !important;
    text-decoration: none !important;
    text-align: center !important;
    margin-top: 8px !important;
    box-shadow: 0 2px 4px rgba(0,102,255,0.2) !important;
}