:root {
    --primary-dark: #0a0e17;
    --secondary-dark: #111827;
    --card-dark: #1a2332;
    --accent-cyan: #00d4ff;
    --accent-blue: #007bff;
    --gradient-start: #00d4ff;
    --gradient-end: #007bff;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius: 16px;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
    --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-blue: 0 0 20px rgba(0, 123, 255, 0.3);
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

nav.scrolled {
    background: rgba(10, 14, 23, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo a {
    display: flex;
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--glow-cyan);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.btn-primary {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(0, 123, 255, 0.1) 0%, transparent 50%);
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-cyan);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite ease-in-out;
}

.particle:nth-child(odd) {
    background: var(--accent-blue);
}

.particle-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
    opacity: 0.2;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
}

.hero-subtitle {
    font-size: 0.95rem;
    color: var(--accent-cyan);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-secondary {
    padding: 12px 32px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

section {
    padding: 80px 0;
}

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

.section-subtitle {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-heading {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.services {
    background: var(--secondary-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--card-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.service-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-md), var(--glow-cyan);
    transform: translateY(-4px);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 123, 255, 0.1));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 24px;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.tech-card {
    background: var(--card-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.tech-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.tech-icon {
    font-size: 32px;
    margin-bottom: 12px;
    color: var(--accent-cyan);
}

.tech-name {
    font-size: 1rem;
    font-weight: 500;
}

.home-product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}

.home-product-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.home-product-card:hover {
    border-color: rgba(0,212,255,0.25);
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.25), 0 0 20px rgba(0,212,255,0.08);
}

.home-product-img {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, rgba(0,212,255,0.05), rgba(0,123,255,0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.home-product-body {
    padding: 20px 24px 24px;
}

.home-product-model {
    font-size: 0.7rem;
    color: var(--accent-cyan);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.home-product-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.home-product-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.home-product-more {
    margin-top: 14px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    transition: gap 0.3s;
}

.home-product-card:hover .home-product-more {
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .home-product-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

.solutions {
    background: var(--secondary-dark);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.solution-card {
    background: var(--card-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all 0.3s ease;
}

.solution-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-md);
}

.solution-image {
    height: 180px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 123, 255, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    position: relative;
    overflow: hidden;
}

.solution-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent);
}

.solution-content {
    padding: 24px;
}

.solution-category {
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 8px;
}

.solution-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.solution-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.solution-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.solution-arrow:hover {
    gap: 12px;
}

.cases {
    background: var(--primary-dark);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.case-card {
    background: var(--card-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.case-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.case-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 123, 255, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 32px;
}

.case-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.case-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
    line-height: 1.4;
}

footer {
    background: var(--secondary-dark);
    border-top: 1px solid var(--border-color);
    padding: 60px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.footer-logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-links-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-item i {
    color: var(--accent-cyan);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.social-links a {
    width: 36px;
    height: 36px;
    background: var(--card-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.social-links a:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.6;
    }
    25% {
        transform: translateY(-20px) translateX(10px);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-10px) translateX(-5px);
        opacity: 0.4;
    }
    75% {
        transform: translateY(-30px) translateX(5px);
        opacity: 0.7;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .section-heading {
        font-size: 1.75rem;
    }

    .services-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

.logo-img,
.footer-logo-img {
    height: 36px;
    width: 52px;
    object-fit: cover;
    object-position: left;
    flex-shrink: 0;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.logo-cn {
    color: #ffffff;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 1px;
    white-space: nowrap;
    line-height: 1.4;
}

.logo-en {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.5rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    white-space: nowrap;
    line-height: 1.4;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.lang-switcher {
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    padding: 2px;
    border: 1px solid var(--border-color);
}
.lang-btn {
    padding: 4px 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s ease;
}
.lang-btn.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
}
.lang-btn:hover:not(.active) {
    color: var(--accent-cyan);
}

.case-link {
    text-decoration: none;
    color: inherit;
    display: block;
}
.case-link .case-card {
    cursor: pointer;
}
.case-link:hover .case-card {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-2px);
}

.copyright-text {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 0;
    text-align: center;
}
.copyright-text a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}
.copyright-text a:hover {
    color: var(--accent-cyan);
}