/* Zenith Terra Tech Limited - Modern Biopharmaceutical Website */
/* Color Theme: Tech Blue + Crimson Red + Warm Yellow - Professional Light Theme */

:root {
    /* Brand Colors - New Scheme */
    --primary: #165DFF;           /* 科技蓝 - 核心主色 60% */
    --primary-dark: #0E42D4;      /* 深蓝 - 悬停状态 */
    --primary-light: #3D7FFF;     /* 浅蓝 - 高亮 */
    --secondary: #A62020;         /* 绛红 - 品牌辅助色 10% */
    --secondary-light: #C41E3A;   /* 亮绛红 - 强调 */
    --accent: #F7BA1E;            /* 暖黄 - 点缀色 5% */
    --accent-light: #FFD666;      /* 浅暖黄 */
    
    /* Base Colors - 基底色 25% */
    --bg-primary: #FFFFFF;        /* 纯白背景 */
    --bg-secondary: #F5F7FA;      /* 浅灰背景 */
    --bg-tertiary: #E6F4FF;       /* 浅蓝背景 */
    --bg-dark: #1a1a2e;           /* 深色区块备用 */
    
    /* Text Colors */
    --text-primary: #1D2129;      /* 主文字 - 近黑 */
    --text-secondary: #4E5969;    /* 次要文字 - 深灰 */
    --text-tertiary: #86909C;     /* 辅助文字 - 中灰 */
    --text-inverse: #FFFFFF;      /* 反白文字 */
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #165DFF 0%, #3D7FFF 100%);
    --gradient-gold: linear-gradient(135deg, #F7BA1E 0%, #FFD666 100%);
    --gradient-red: linear-gradient(135deg, #A62020 0%, #C41E3A 100%);
    --gradient-hero: linear-gradient(135deg, #E6F4FF 0%, #F5F7FA 50%, #FFFFFF 100%);
    
    /* Shadows - 更柔和的投影 */
    --shadow-sm: 0 2px 8px rgba(22, 93, 255, 0.08);
    --shadow-md: 0 4px 16px rgba(22, 93, 255, 0.12);
    --shadow-lg: 0 8px 32px rgba(22, 93, 255, 0.16);
    --shadow-accent: 0 4px 16px rgba(247, 186, 30, 0.25);
    --shadow-red: 0 4px 16px rgba(166, 32, 32, 0.2);
    
    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation - 白色背景 + 科技蓝主色 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 12px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border-bottom: 1px solid rgba(22, 93, 255, 0.08);
}

.navbar.scrolled {
    padding: 8px 0;
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

.nav-link:hover {
    color: var(--primary);
}

.contact-btn {
    background: var(--gradient-primary);
    color: var(--text-inverse) !important;
    padding: 10px 24px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.contact-btn::after {
    display: none;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.bar {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section - 浅蓝渐变背景 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(22, 93, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(247, 186, 30, 0.06) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23165DFF' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(22, 93, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 50px;
    margin-bottom: 30px;
    border: 1px solid rgba(22, 93, 255, 0.2);
}

.hero-badge i {
    color: var(--accent);
    font-size: 1.1rem;
}

.hero-badge span {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 25px;
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--text-inverse);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--bg-tertiary);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    gap: 50px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-top: 5px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--text-tertiary);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; transform: translateX(-50%) translateY(5px); }
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section - 白色背景 */
.about {
    background: var(--bg-primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.about-logo-container {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    border: 1px solid rgba(22, 93, 255, 0.1);
}

.about-logo-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.about-slogan {
    text-align: center;
    color: var(--text-tertiary);
    font-style: italic;
    max-width: 300px;
}

.about-slogan i {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: 10px;
    display: block;
}

.about-text h3 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.about-lead {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 40px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 1.2rem;
}

.feature-text h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.feature-text p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Certificates Section - 浅灰背景 */
.certificates {
    background: var(--bg-secondary);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.cert-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(22, 93, 255, 0.08);
    transition: var(--transition);
    position: relative;
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.cert-card.featured {
    border: 2px solid var(--accent);
    box-shadow: var(--shadow-accent);
}

.cert-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gradient-gold);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    z-index: 10;
}

.cert-image {
    height: 220px;
    overflow: hidden;
    background: var(--bg-secondary);
}

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

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

.cert-content {
    padding: 25px;
}

.cert-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.cert-issuer {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.cert-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.cert-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.cert-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.cert-meta i {
    color: var(--accent);
}

/* Products Section - 科技蓝渐变背景 */
.products {
    background: linear-gradient(135deg, #165DFF 0%, #0E42D4 100%);
    color: var(--text-inverse);
}

.products .section-title,
.products .section-subtitle {
    color: var(--text-inverse);
}

.products .section-tag {
    -webkit-text-fill-color: var(--accent-light);
}

.products-content {
    max-width: 1000px;
    margin: 0 auto;
}

.product-main {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.product-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.product-icon-large {
    width: 150px;
    height: 150px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-accent);
}

.product-applications {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    width: 100%;
}

.app-item {
    background: rgba(255, 255, 255, 0.15);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    padding: 15px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid rgba(247, 186, 30, 0.3);
    transition: var(--transition);
}

.app-item:hover {
    background: rgba(247, 186, 30, 0.2);
    transform: translateY(-3px);
}

.app-item i {
    display: block;
    font-size: 1.5rem;
    color: var(--accent-light);
    margin-bottom: 8px;
}

.app-item span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.95);
}

.product-details h3 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    margin-bottom: 20px;
}

.product-lead {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.9;
    margin-bottom: 30px;
}

.product-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 35px;
}

.pfeature {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent);
}

.pfeature i {
    color: var(--accent-light);
}

.pfeature span {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.95);
}

/* Partner Section - 白色背景 */
.partner {
    background: var(--bg-primary);
}

.partner-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.partner-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.partner-image img {
    width: 100%;
    height: auto;
    display: block;
}

.partner-image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 30px 20px 20px;
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.partner-image-caption i {
    color: var(--accent);
}

.partner-info {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.partner-logo-section {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(22, 93, 255, 0.1);
}

.partner-logo-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-primary);
    margin: 0 auto 20px;
}

.partner-logo-section h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.partner-en {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.partner-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.pdetail {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.pdetail i {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1rem;
}

.pdetail h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.pdetail p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.partner-meeting h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.partner-meeting h4 i {
    color: var(--accent);
}

.meeting-timeline {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--text-tertiary);
}

.timeline-dot.active {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.2);
}

.timeline-content {
    display: flex;
    flex-direction: column;
}

.timeline-date {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.9rem;
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Contact Section - 浅蓝背景 */
.contact {
    background: var(--bg-tertiary);
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.contact-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid rgba(22, 93, 255, 0.1);
    box-shadow: var(--shadow-sm);
}

.contact-card.primary {
    background: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);
    color: var(--text-inverse);
    border: none;
}

.contact-card.primary .contact-logo {
    background: var(--bg-primary);
    padding: 15px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.contact-card-header {
    text-align: center;
    margin-bottom: 30px;
}

.contact-logo {
    max-width: 200px;
    height: auto;
    border-radius: var(--radius-md);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cdetail {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.cdetail i {
    width: 40px;
    height: 40px;
    background: rgba(247, 186, 30, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1rem;
}

.cdetail .clabel {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 3px;
}

.cdetail .cvalue {
    display: block;
    font-size: 1rem;
    color: var(--text-inverse);
    font-weight: 500;
}

.cdetail .cvalue.link {
    color: var(--accent);
    text-decoration: none;
}

.cdetail .cvalue.link:hover {
    text-decoration: underline;
}

.contact-cta-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid rgba(22, 93, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.contact-cta-box h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.contact-cta-box > p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.response-time {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.response-time i {
    color: var(--accent);
}

/* Footer - 深色背景 */
.footer {
    background: #1a1a2e;
    color: var(--text-inverse);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 300px;
}

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: 15px;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.footer-slogan {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-email,
.footer-web {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-email:hover,
.footer-web:hover {
    color: var(--accent);
}

.footer-email i,
.footer-web i {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-reg {
    margin-top: 10px;
    font-size: 0.8rem !important;
}

/* ===== Animation Classes ===== */

/* Hero entrance animations */
.hero-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

body.loaded .hero-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll-triggered animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays for different elements */
.cert-card:nth-child(1) { transition-delay: 0ms; }
.cert-card:nth-child(2) { transition-delay: 100ms; }
.cert-card:nth-child(3) { transition-delay: 200ms; }

/* Image lazy loading states */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.loaded {
    opacity: 1;
}

/* Touch device optimizations */
.touch-device .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .hero-animate,
    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .about-content,
    .product-main,
    .partner-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        order: -1;
    }
    
    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cert-card.featured {
        grid-column: span 2;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-md);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-logo {
        height: 40px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .certs-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-card.featured {
        grid-column: span 1;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }
    
    .footer-brand {
        align-items: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-contact {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-logo-container,
    .contact-card,
    .partner-info,
    .contact-cta-box {
        padding: 25px;
    }
    
    .product-applications {
        grid-template-columns: 1fr;
    }
    
    .app-item {
        display: flex;
        align-items: center;
        gap: 15px;
        text-align: left;
    }
    
    .app-item i {
        margin-bottom: 0;
    }
}