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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: #1a1a1a;
    line-height: 1.7;
    background: #ffffff;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Navigation */
.header {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
}

.navbar {
    padding: 20px 0;
    transition: padding 0.4s ease;
}

.header.scrolled .navbar {
    padding: 16px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo div {
    display: flex;
    align-items: center;
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.header.scrolled .logo div {
    color: #1a1a1a;
}

.logo img {
    margin-right: 12px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 36px;
    align-items: center;
}

.nav-menu li {
    position: relative;
}

.nav-menu li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 0.3px;
}

.header.scrolled .nav-menu li a {
    color: #4a4a4a;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #4FC3F7, #FFD700);
    transition: all 0.3s ease;
    transform: translateX(-50%);
    border-radius: 1px;
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    width: 100%;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: #ffffff;
}

.header.scrolled .nav-menu li a:hover,
.header.scrolled .nav-menu li a.active {
    color: #1976D2;
}

/* Dropdown Menu */
.nav-menu .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    min-width: 200px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
    list-style: none;
    padding: 8px 0;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1000;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-menu .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(4px);
}

.nav-menu .dropdown-menu li {
    display: block;
}

.nav-menu .dropdown-menu li a {
    display: block;
    padding: 12px 20px;
    color: #4a4a4a;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-menu .dropdown-menu li a:hover {
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.08), rgba(255, 215, 0, 0.08));
    color: #1976D2;
}

/* Banner Slider */
.banner-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

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

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    background-size: cover;
    background-position: center;
}

.slide.active {
    opacity: 1;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.35);
}

.banner-fixed-title {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    max-width: 800px;
    z-index: 10;
    width: 90%;
}

.banner-fixed-title h1 {
    font-size: 52px;
    margin-bottom: 24px;
    color: #ffffff;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -1px;
}

.glow-text {
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.banner-fixed-title p:nth-child(2) {
    font-size: 22px;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
}

.banner-fixed-title p:nth-child(3) {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
}

.bounce {
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Social Links in Banner */
.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 14px;
    font-weight: 500;
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Slider Controls */
.slider-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    transition: all 0.4s ease;
}

.slider-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}

.slider-dot.active {
    background: #ffffff;
    width: 32px;
    border-radius: 10px;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-light {
    background: #ffffff;
}

.section-dark {
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 64px;
}

.section-title h2 {
    font-size: 36px;
    color: #1a1a1a;
    position: relative;
    display: inline-block;
    padding-bottom: 16px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 12px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #4FC3F7, #FFD700);
    border-radius: 2px;
}

.section-title p {
    color: #6b7280;
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Stats Section */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #0D47A1 0%, #1565C0 50%, #1976D2 100%);
    position: relative;
    overflow: hidden;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}

.stat-item {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.stat-icon {
    margin-bottom: 20px;
}

.stat-icon i {
    font-size: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.stat-content h3 {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.stat-content p {
    font-size: 40px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-content h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 24px;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.about-content p {
    font-size: 16px;
    line-height: 1.9;
    color: #4b5563;
    margin-bottom: 20px;
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transform: scale(1.08);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.about-image:hover img {
    transform: scale(1.13);
}

/* Products Section */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
}

.product-image {
    height: 259px;
    overflow: hidden;
    position: relative;
}

.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(79, 195, 247, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.product-card:hover .product-image::after {
    opacity: 1;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.08);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.product-card:hover .product-image img {
    transform: scale(1.19);
}

.product-content {
    padding: 32px;
}

.product-content h3 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 12px;
    font-weight: 600;
}

.product-content p {
    font-size: 15px;
    color: #6b7280;
    line-height: 1.8;
    margin-bottom: 24px;
}

.more-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: linear-gradient(135deg, #4FC3F7 0%, #FFD700 100%);
    color: #1a1a1a;
    text-decoration: none;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 4px 16px rgba(79, 195, 247, 0.3);
}

.more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 195, 247, 0.4);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.feature-item {
    background: #ffffff;
    padding: 48px 36px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #4FC3F7 0%, #FFD700 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.feature-icon i {
    font-size: 32px;
    color: #1a1a1a;
}

.feature-item h3 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-item p {
    color: #6b7280;
    font-size: 15px;
    line-height: 1.8;
}

.features-container {
    position: relative;
    padding: 40px 0;
}

.features-wrapper {
    display: flex;
    gap: 40px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.advantage-card {
    width: 300px;
    position: relative;
    transform: rotate(-3deg);
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
}

.advantage-card:nth-child(2) {
    transform: rotate(3deg);
}

.advantage-card:nth-child(3) {
    transform: rotate(-2deg);
}

.advantage-card:hover {
    transform: rotate(0deg) scale(1.05) translateY(-10px);
    z-index: 10;
}

.advantage-inner {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 24px;
    padding: 40px 32px;
    box-shadow: 0 8px 40px rgba(79, 195, 247, 0.12);
    border: 1px solid rgba(79, 195, 247, 0.15);
    position: relative;
    overflow: hidden;
}

.advantage-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4FC3F7, #FFD700, #4FC3F7);
    background-size: 200% 100%;
    animation: shimmerLine 3s ease infinite;
}

@keyframes shimmerLine {
    0%, 100% { background-position: -200% 0; }
    50% { background-position: 200% 0; }
}

.advantage-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #4FC3F7 0%, #FFD700 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.advantage-icon {
    font-size: 52px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #4FC3F7 0%, #FFD700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.advantage-inner h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 14px;
    font-weight: 700;
}

.advantage-inner p {
    color: #6b7280;
    font-size: 15px;
    line-height: 1.8;
}

.advantage-decoration {
    position: absolute;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.1), rgba(255, 215, 0, 0.1));
    border-radius: 50%;
    z-index: 0;
}

.advantage-decoration-1 {
    top: -20px;
    right: -20px;
}

.advantage-decoration-2 {
    bottom: -30px;
    left: -30px;
    width: 100px;
    height: 100px;
}

@media (max-width: 1024px) {
    .features-wrapper {
        gap: 30px;
    }
    
    .advantage-card {
        width: 260px;
    }
}

@media (max-width: 768px) {
    .features-wrapper {
        flex-direction: column;
        gap: 24px;
    }
    
    .advantage-card {
        width: 100%;
        max-width: 300px;
        transform: rotate(0deg);
    }
    
    .advantage-card:nth-child(2),
    .advantage-card:nth-child(3) {
        transform: rotate(0deg);
    }
    
    .advantage-card:hover {
        transform: scale(1.03) translateY(-6px);
    }
}

/* Certifications Gallery */
.certifications-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.cert-item {
    position: relative;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.cert-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(79, 195, 247, 0.15);
}

.cert-item img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
    padding: 32px;
}

.cert-item .zoom-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 56px;
    height: 56px;
    background: rgba(25, 118, 210, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(25, 118, 210, 0.4);
}

.cert-item:hover .zoom-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 40px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: scaleIn 0.4s ease;
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 12px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

.lightbox-close {
    position: absolute;
    top: -60px;
    right: 0;
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Cases Grid */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.case-card {
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.case-image {
    height: 281px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.08);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.case-card:hover .case-image img {
    transform: scale(1.19);
}

.case-content {
    padding: 32px;
}

.case-content h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.3;
}

.case-meta {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
    font-size: 14px;
    color: #9ca3af;
}

.case-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.case-content p {
    color: #6b7280;
    font-size: 15px;
    line-height: 1.8;
}

/* Culture Grid */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.culture-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    padding: 40px 28px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.culture-icon {
    font-size: 44px;
    margin-bottom: 20px;
    color: #1976D2;
}

.culture-card h3 {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 10px;
    font-weight: 600;
}

.culture-card p {
    color: #6b7280;
    font-size: 14px;
    line-height: 1.7;
}

/* Solutions Section */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.solution-card {
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.solution-header {
    background: linear-gradient(135deg, #1976D2 0%, #4FC3F7 100%);
    padding: 40px 32px;
    text-align: center;
}

.solution-icon {
    width: 72px;
    height: 72px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.solution-icon i {
    font-size: 32px;
    color: #fff;
}

.solution-header h3 {
    color: #fff;
    font-size: 22px;
    margin: 0;
    font-weight: 600;
}

.solution-body {
    padding: 32px;
}

.solution-features {
    list-style: none;
    padding: 0;
}

.solution-features li {
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
    color: #4b5563;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.solution-features li:last-child {
    border-bottom: none;
}

.solution-features li::before {
    content: '✓';
    color: #1976D2;
    font-weight: 700;
    font-size: 16px;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: #f8f9fa;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: #e3f2fd;
    transform: translateX(8px);
}

.contact-item-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #4FC3F7, #FFD700);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item-icon i {
    font-size: 22px;
    color: #1a1a1a;
}

.contact-item-content h4 {
    font-size: 16px;
    color: #1a1a1a;
    margin-bottom: 8px;
    font-weight: 600;
}

.contact-item-content p {
    color: #6b7280;
    font-size: 15px;
    line-height: 1.6;
}

.contact-form {
    background: #ffffff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.contact-form h3 {
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 32px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 28px;
    position: relative;
}

.form-group label {
    display: block;
    color: #1f2937;
    margin-bottom: 12px;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #f1f5f9;
    border-radius: 16px;
    font-size: 15px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-family: inherit;
    background: #f8fafc;
    color: #1f2937;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: #dbeafe;
    background: #ffffff;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #4FC3F7;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(79, 195, 247, 0.15),
                0 8px 24px rgba(79, 195, 247, 0.12);
    transform: translateY(-2px);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group textarea {
    resize: vertical;
    min-height: 160px;
    line-height: 1.8;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%234FC3F7'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 20px center;
    background-size: 20px;
    padding-right: 52px;
}

.submit-btn {
    width: 100%;
    padding: 18px 32px;
    background: linear-gradient(135deg, #4FC3F7 0%, #FFD700 100%);
    color: #1a1a1a;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 6px 20px rgba(79, 195, 247, 0.35);
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(79, 195, 247, 0.45);
}

.submit-btn:active {
    transform: translateY(-1px);
}

/* Footer */
.footer {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: #ffffff;
    padding: 80px 0 32px;
}

.footer-top {
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 56px;
}

.footer-logo div {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.footer-logo img {
    margin-right: 12px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 28px;
}

.footer-contact-info {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
}

.footer-contact-item i {
    color: #FFD700;
    width: 18px;
}

.footer-column h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.3px;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #FFD700;
    padding-left: 4px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social a:hover {
  background: linear-gradient(135deg, #4FC3F7, #FFD700);
  color: #1a1a1a;
  transform: translateY(-3px);
}

.footer-social .social-wechat {
  position: relative;
}

.footer-social .social-wechat .wechat-qrcode {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  padding: 10px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 100;
}

.footer-social .social-wechat .wechat-qrcode::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-top-color: white;
}

.footer-social .social-wechat .wechat-qrcode img {
  width: 150px;
  height: 150px;
  display: block;
  border-radius: 4px;
}

.footer-social .social-wechat:hover .wechat-qrcode {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-10px);
}

.footer-bottom {
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin: 0;
}

.footer-bottom .footer-tech {
    margin-top: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom .footer-tech a {
    color: #FFD700;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-bottom .footer-tech a:hover {
    color: #fff;
    text-decoration: underline;
}

/* Animations & Effects */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll Progress */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #4FC3F7, #FFD700);
    z-index: 9999;
    transition: width 0.1s ease;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.certificate-card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid #f0f0f0;
    cursor: pointer;
}

.certificate-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(79, 195, 247, 0.15);
}

.certificate-image {
    position: relative;
    padding: 32px 32px 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    overflow: hidden;
}

.certificate-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    transition: transform 0.4s ease;
}

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

.certificate-image .zoom-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 56px;
    height: 56px;
    background: rgba(25, 118, 210, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(25, 118, 210, 0.4);
}

.certificate-card:hover .zoom-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.certificate-content {
    padding: 20px 24px 24px;
    text-align: center;
}

.certificate-content h4 {
    font-size: 16px;
    color: #1a1a1a;
    margin-bottom: 6px;
    font-weight: 600;
}

.certificate-content p {
    font-size: 13px;
    color: #9ca3af;
}

@media (max-width: 1024px) {
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: 1fr;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    
    .stats-grid,
    .products-grid,
    .news-grid,
    .features-grid,
    .culture-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certifications-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .contact-grid,
    .cases-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .section {
        padding: 64px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .nav-wrapper {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
    
    .banner-slider {
        min-height: 500px;
    }
    
    .banner-fixed-title h1 {
        font-size: 36px;
    }
    
    .banner-fixed-title p:nth-child(2) {
        font-size: 18px;
    }
    
    .footer {
        padding: 24px 0 16px;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 16px;
        padding-bottom: 16px;
    }
    
    .footer-desc {
        display: none;
    }
    
    .footer-logo div {
        font-size: 13px;
        margin-bottom: 10px;
        justify-content: center;
        text-align: center;
    }
    
    .footer-logo img {
        height: 22px;
        margin-right: 6px;
    }
    
    .footer-contact-info {
        gap: 6px;
        align-items: center;
    }
    
    .footer-contact-item {
        font-size: 11px;
        justify-content: center;
    }
    
    .footer-contact-item i {
        width: 14px;
        font-size: 12px;
    }
    
    .footer-column:nth-child(2),
    .footer-column:nth-child(3) {
        display: none;
    }
    
    .footer-social {
        margin-top: 10px;
        justify-content: center;
        gap: 8px;
    }
    
    .footer-social a {
        width: 32px;
        height: 32px;
        border-radius: 8px;
    }
    
    .footer-bottom {
        padding-top: 12px;
    }
    
    .footer-bottom p {
        font-size: 10px;
        line-height: 1.4;
    }
    
    .footer-bottom .footer-tech {
        margin-top: 6px;
        font-size: 10px;
    }
    
    .stats-grid,
    .products-grid,
    .news-grid,
    .features-grid,
    .culture-grid,
    .certifications-gallery {
        grid-template-columns: 1fr;
    }
    
    .language-selector {
        margin-left: 0;
        margin-top: 12px;
        justify-content: center;
    }
    
    .nav-wrapper {
        flex-direction: column;
    }
}

/* Language Selector - Dropdown Menu */
.language-dropdown {
  position: relative;
  display: inline-block;
  margin-left: 20px;
}

.language-dropdown-toggle {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.header.scrolled .language-dropdown-toggle {
  color: #4a4a4a;
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.1);
}

.language-dropdown-toggle:hover {
  background: linear-gradient(135deg, #4FC3F7, #FFD700);
  color: #1a1a1a;
  border-color: transparent;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 195, 247, 0.3);
}

.header.scrolled .language-dropdown-toggle:hover {
  background: linear-gradient(135deg, #4FC3F7, #FFD700);
  color: #1a1a1a;
}

.language-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  min-width: 140px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
  list-style: none;
  padding: 8px 0;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%);
  transform: translateY(12px);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 1000;
}

.language-dropdown:hover .language-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.language-dropdown-item {
  display: block;
  padding: 12px 20px;
  color: #4a4a4a;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
  cursor: pointer;
}

.language-dropdown-item:hover,
.language-dropdown-item.active {
  background: linear-gradient(135deg, rgba(79, 195, 247, 0.08), rgba(255, 215, 0, 0.08));
  color: #1976D2;
}

.language-dropdown-arrow {
  font-size: 10px;
  transition: transform 0.3s ease;
}

.language-dropdown:hover .language-dropdown-arrow {
  transform: rotate(180deg);
}

/* RTL Support for Language Dropdown */
html.rtl .language-dropdown-menu {
  right: auto;
  left: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .language-dropdown {
    margin-left: 0;
    margin-top: 12px;
  }
  
  .language-dropdown-toggle {
    padding: 6px 12px;
    font-size: 13px;
  }
}