/* 现代配色方案 - 深蓝青色科技风 */
:root {
    /* 背景色 */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1a2332;
    --bg-card: #1e293b;
    
    /* 主题色 - 青蓝渐变 */
    --primary-color: #06b6d4;
    --primary-light: #22d3ee;
    --primary-dark: #0891b2;
    --secondary-color: #3b82f6;
    --accent-color: #8b5cf6;
    --accent-pink: #ec4899;
    
    /* 文字颜色 */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #64748b;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-bg: linear-gradient(180deg, #0a0e1a 0%, #111827 100%);
    
    /* 边框和分隔线 */
    --border-color: rgba(6, 182, 212, 0.15);
    --border-light: rgba(255, 255, 255, 0.1);
    
    /* 阴影 */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.4);
    --shadow-glow-blue: 0 0 30px rgba(59, 130, 246, 0.4);
    --shadow-glow-purple: 0 0 30px rgba(139, 92, 246, 0.4);
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(ellipse at top left, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at top right, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
    overflow-x: hidden;
    scroll-behavior: smooth;
    position: relative;
}

/* 动态背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(6, 182, 212, 0.03) 2px, rgba(6, 182, 212, 0.03) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(59, 130, 246, 0.03) 2px, rgba(59, 130, 246, 0.03) 4px);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* Header - 全新设计 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 15, 35, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.header:hover::before {
    opacity: 0.5;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-brand h1 {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.brand-chinese {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 4px 12px;
    background: rgba(124, 58, 237, 0.1);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 15px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.nav-link:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 0.15;
}

.nav-link.active {
    color: var(--text-primary);
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section - 全新设计 */
.hero {
    padding: 200px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 50%, rgba(6, 182, 212, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.25) 0%, transparent 50%);
    animation: heroGlow 15s ease-in-out infinite;
}

.hero-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(to right, rgba(6, 182, 212, 0.1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, white 40%, transparent 70%);
    animation: gridFloat 30s linear infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(5%, 5%) rotate(120deg); }
    66% { transform: translate(-5%, 5%) rotate(240deg); }
}

@keyframes gridFloat {
    0% { background-position: 0 0; }
    100% { background-position: 60px 60px; }
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 80px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    line-height: 1.1;
    letter-spacing: -0.03em;
    animation: fadeInUp 0.8s ease-out;
    position: relative;
    display: inline-block;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
    opacity: 0.6;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 50px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    font-weight: 400;
}

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

.btn {
    padding: 18px 48px;
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.btn::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0;
    filter: blur(10px);
    transition: opacity var(--transition-base);
    z-index: -2;
}

.btn:hover::after {
    opacity: 0.6;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary::before {
    opacity: 0.1;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Sections - 全新设计 */
section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
}

.section-header::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    opacity: 0.1;
    border-radius: 50%;
    filter: blur(30px);
}

.section-header::after {
    content: '';
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section-title {
    font-size: 56px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
}

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

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Services Section */
.services {
    background-color: var(--card-bg);
}

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

.service-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 50px 35px;
    transition: all var(--transition-slow);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-slow);
    z-index: 0;
}

.service-card:hover::before {
    opacity: 0.05;
}

.service-card:hover {
    transform: translateY(-12px);
    border-color: var(--primary-color);
    box-shadow: 0 25px 50px rgba(124, 58, 237, 0.3);
}

.service-card > * {
    position: relative;
    z-index: 1;
}

.service-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    transition: all var(--transition-slow);
    position: relative;
    box-shadow: var(--shadow-glow);
}

.service-icon::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0;
    filter: blur(20px);
    transition: opacity var(--transition-slow);
    z-index: -1;
}

.service-card:hover .service-icon {
    transform: scale(1.15) rotate(-5deg);
}

.service-card:hover .service-icon::before {
    opacity: 0.8;
}

.service-icon i {
    font-size: 44px;
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.service-card h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
    margin-bottom: 15px;
}

.service-card p strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Cases Section - 并排布局 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.case-card {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0;
    background: transparent;
    border-radius: 0;
    border: none;
    transition: all var(--transition-slow);
}

.case-card:hover {
    transform: translateY(-10px);
}

.case-image {
    width: 100%;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    overflow: hidden;
    height: 350px;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.case-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 39, 0.3) 100%);
    z-index: 1;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.case-card:hover .case-image::before {
    opacity: 1;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.1);
}

.case-content {
    padding: 40px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
    flex: 1;
    transition: all var(--transition-base);
}

.case-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
}

.case-card:hover .case-content {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.case-placeholder i {
    font-size: 64px;
    color: white;
    opacity: 0.5;
}

.case-content h3 {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    line-height: 1.2;
}

.case-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(100, 255, 218, 0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.case-content p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.case-features {
    list-style: none;
}

.case-features li {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 15px;
}

.case-features i {
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 14px;
}

/* Contact Section */
.contact {
    background-color: var(--card-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 20px;
    color: white;
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 4px;
}

.contact-details p {
    color: var(--text-muted);
    line-height: 1.5;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    font-size: 16px;
    color: var(--text-color);
    transition: border-color 0.3s ease, background-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--card-bg);
    color: var(--text-muted);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

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

.social-links a {
    color: var(--text-muted);
    font-size: 20px;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.footer-brand h3 {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-section h4 {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a, .footer-section span {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .case-card {
        grid-template-columns: 1fr;
    }

    .case-card:nth-child(even) .case-image {
        order: 1;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 48px;
    }

    .section-title {
        font-size: 36px;
    }

    .contact-content, .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }

    .section-title {
        font-size: 32px;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* 品牌信息区域 - 全新设计 */
.brand-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin: 50px 0;
}

.brand-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 25px 30px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.brand-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.brand-item:hover::before {
    transform: scaleY(1);
}

.brand-item:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-glow);
}

.brand-item i {
    font-size: 32px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 40px;
}

.brand-item span {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.6;
}

/* 技术标签样式 - 全新设计 */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

.tech-tags .tag,
.case-tags .tag {
    background: rgba(6, 182, 212, 0.1);
    color: var(--primary-light);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tech-tags .tag::before,
.case-tags .tag::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tech-tags .tag:hover,
.case-tags .tag:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    color: white;
}

.tech-tags .tag:hover::before,
.case-tags .tag:hover::before {
    opacity: 0.2;
}

/* 案例详细样式 - 全新设计 */
.case-challenge,
.case-solution,
.case-results {
    margin-top: 25px;
    padding: 20px;
    background: rgba(6, 182, 212, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    transition: all var(--transition-base);
}

.case-challenge:hover,
.case-solution:hover,
.case-results:hover {
    background: rgba(6, 182, 212, 0.1);
    transform: translateX(5px);
}

.case-challenge h4,
.case-solution h4,
.case-results h4 {
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.case-challenge h4::before,
.case-solution h4::before,
.case-results h4::before {
    content: '▶';
    font-size: 12px;
}

.case-challenge p,
.case-solution p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
}

/* 合作生态样式 */
.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.cooperation-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cooperation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.cooperation-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}

.cooperation-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
    box-shadow: var(--shadow-glow);
    position: relative;
}

.cooperation-icon::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0;
    filter: blur(15px);
    transition: opacity var(--transition-base);
    z-index: -1;
}

.cooperation-card:hover .cooperation-icon::before {
    opacity: 0.7;
}

.cooperation-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.cooperation-content {
    text-align: left;
}

.support-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.support-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.support-item h4 {
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.support-item p {
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.6;
}

/* 联系表单增强 */
.form-header {
    text-align: center;
    margin-bottom: 30px;
}

.form-header h3 {
    font-size: 24px;
    font-weight: 600;
    color: white;
    margin-bottom: 10px;
}

.form-header p {
    color: var(--text-muted);
    font-size: 14px;
}

.form-group select {
    width: 100%;
    padding: 15px;
    background: rgba(13, 17, 23, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}

.form-group select option {
    background: var(--card-bg);
    color: var(--text-color);
}

/* 数据统计样式 - 全新设计 */
.stats-section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: 0;
}

.stat-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-slow);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.3);
}

.stat-number {
    font-size: 56px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    line-height: 1;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

/* 进度条样式 - 全新设计 */
.progress-bar {
    width: 100%;
    height: 10px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 20px 0;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 响应式设计优化 */
@media (max-width: 1200px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-info {
        gap: 15px;
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .brand-info {
        grid-template-columns: 1fr;
    }
    
    .brand-item {
        padding: 12px 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .cooperation-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .cooperation-card {
        padding: 20px;
    }
    
    .tech-tags {
        justify-content: center;
    }
    
    .case-challenge,
    .case-solution,
    .case-results {
        padding: 12px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-image {
        height: 300px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* 合作信息区域样式 */
.cooperation-info {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.cooperation-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.cooperation-header h3 {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cooperation-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.cooperation-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.cooperation-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.cooperation-type {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cooperation-type::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.1), transparent);
    transition: left 0.5s ease;
}

.cooperation-type:hover::before {
    left: 100%;
}

.cooperation-type:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.type-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.cooperation-type h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.cooperation-type p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.cooperation-contact {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.contact-highlight {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.contact-highlight i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.contact-highlight span {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.contact-method:hover {
    background: var(--bg-card);
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.contact-method i {
    color: var(--primary-color);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.contact-method span {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .cooperation-info {
        padding: var(--spacing-lg);
    }
    
    .cooperation-types {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .cooperation-type {
        padding: var(--spacing-md);
    }
    
    .type-icon {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .cooperation-header h3 {
        font-size: 1.5rem;
    }
    
    .contact-methods {
        gap: var(--spacing-sm);
    }
    
    .contact-method {
        padding: var(--spacing-sm);
    }
}

/* 扩展联系信息区域样式 */
.extended-contact-info {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.contact-row {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: var(--spacing-lg) !important;
    margin-bottom: var(--spacing-lg);
    min-width: 0;
    width: 100%;
}

/* 强制所有屏幕尺寸的两列布局（除了很小的手机） */
@media (min-width: 481px) {
    .contact-row {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: var(--spacing-md) !important;
    }
    
    .contact-item-extended {
        width: 100% !important;
        box-sizing: border-box !important;
    }
}

.contact-row:last-child {
    margin-bottom: 0;
}

.contact-item-extended {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-item-extended::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.1), transparent);
    transition: left 0.5s ease;
}

.contact-item-extended:hover::before {
    left: 100%;
}

.contact-item-extended:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.contact-item-extended .contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.contact-item-extended .contact-details h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-item-extended .contact-details p {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-item-extended .contact-details small {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.4;
    display: block;
}

/* 响应式设计 - 简化版本 */
@media (max-width: 480px) {
    .extended-contact-info {
        padding: var(--spacing-md) !important;
    }
    
    .contact-row {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: var(--spacing-sm) !important;
    }
    
    .contact-item-extended {
        padding: var(--spacing-sm) !important;
        width: 100% !important;
    }
    
    .contact-item-extended .contact-icon {
        width: 40px !important;
        height: 40px !important;
        font-size: 1rem !important;
    }
}

/* 平板和桌面端强制两列 */
@media (min-width: 481px) {
    .contact-row {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
    }
}