/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

/* 全局动态背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.03) 0%, transparent 70%);
    animation: backgroundFloat 30s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes backgroundFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -20px) scale(1.05); }
    66% { transform: translate(-15px, 15px) scale(0.95); }
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, #764ba2, transparent);
    animation: navGlow 3s ease-in-out infinite;
}

@keyframes navGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

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

.nav-brand h2 {
    color: #2563eb;
    font-weight: 600;
    font-size: 1.5rem;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-brand h2::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 1px;
    opacity: 0.6;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #2563eb;
    transition: width 0.3s ease;
}

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

.nav-link.active {
    color: #2563eb;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 神经网络背景 */
.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.4;
    pointer-events: none;
}

#neural-canvas {
    width: 100%;
    height: 100%;
    display: block;
    filter: blur(0.5px);
}

.hero .container {
    position: relative;
    z-index: 2;
}

/* 增强banner的视觉层次 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.3) 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 3;
}

/* 为文字添加微妙的发光效果，与神经网络呼应 */
.hero-title {
    text-shadow: 
        0 0 10px rgba(255, 255, 255, 0.3),
        0 0 20px rgba(255, 255, 255, 0.2),
        0 0 30px rgba(255, 255, 255, 0.1);
}

.hero-subtitle {
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

/* 按钮增强效果 */
.btn-primary,
.btn-secondary {
    backdrop-filter: blur(10px);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover,
.btn-secondary:hover {
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 20px rgba(255, 255, 255, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

/* 首页统计数据样式 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin: 3rem 0;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-stats .stat-item {
    text-align: center;
    position: relative;
}

.hero-stats .stat-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.hero-stats .stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: white;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-bottom: 0.5rem;
    position: relative;
}

.hero-stats .stat-number::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    border-radius: 2px;
}

.hero-stats .stat-label {
    font-size: 1rem;
    font-weight: 500;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* 动态粒子背景 */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.4));
    border-radius: 50%;
    opacity: 0.6;
    animation: heroParticleFloat 12s infinite linear;
}

@keyframes heroParticleFloat {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s both;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: white;
    color: #2563eb;
}

.btn-primary:hover {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: white;
    color: #2563eb;
}

/* 服务部分 */
.services {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 25% 25%, rgba(102, 126, 234, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(118, 75, 162, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
    position: relative;
    background: linear-gradient(135deg, #1e293b 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.125rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 
        0 10px 25px -5px rgba(0, 0, 0, 0.1),
        0 8px 10px -6px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: left 0.6s;
}

.service-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.15),
        0 20px 20px -5px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.service-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: iconRotate 4s linear infinite;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover .service-icon::before {
    opacity: 1;
}

@keyframes iconRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.service-card p {
    color: #64748b;
    line-height: 1.6;
}/* 
关于我们部分 */
.about {
    padding: 80px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 75% 25%, rgba(102, 126, 234, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 25% 75%, rgba(118, 75, 162, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1.5rem;
    position: relative;
    background: linear-gradient(135deg, #1e293b 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.about-text p {
    color: #64748b;
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.7;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 12px 16px;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.1), transparent);
    transition: left 0.5s;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #cbd5e1;
}

.feature:hover::before {
    left: 100%;
}

.feature i {
    color: #10b981;
    font-size: 1.25rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 8px;
    flex-shrink: 0;
}

.feature span {
    color: #374151;
    font-weight: 600;
    font-size: 0.95rem;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.image-placeholder p {
    font-size: 1.25rem;
    font-weight: 600;
}

/* 联系我们部分 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(118, 75, 162, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    box-shadow: 
        0 10px 25px -5px rgba(0, 0, 0, 0.1),
        0 8px 10px -6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: left 0.6s;
}

.contact-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 
        0 20px 40px -12px rgba(0, 0, 0, 0.15),
        0 15px 15px -5px rgba(0, 0, 0, 0.04);
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: white;
}

.contact-details h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: #64748b;
    font-size: 1rem;
}

.social-links {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.social-links h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1.5rem;
    text-align: center;
}

.social-icons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    text-decoration: none;
    color: #374151;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #e2e8f0;
    transform: translateX(5px);
}

.social-link i {
    font-size: 1.5rem;
    width: 30px;
}

.whatsapp-qr {
    margin-top: 1rem;
}

.qr-code {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    color: #64748b;
}

.qr-image {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.qr-code p {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
}

.qr-code small {
    font-size: 0.875rem;
    color: #64748b;
}

/* 页脚 */
.footer {
    background: #1e293b;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #60a5fa;
}

.footer-brand p {
    color: #94a3b8;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #f1f5f9;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
    color: #94a3b8;
    font-size: 0.875rem;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 1rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.875rem;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        padding: 120px 0 120px;
        min-height: 100vh;
    }

    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
        margin-bottom: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
        margin: 2rem 0;
    }

    .hero-stats .stat-number {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 2rem;
    }

    .btn {
        width: 200px;
        text-align: center;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

    .about-text h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 120px 0 100px;
        min-height: 100vh;
    }

    .hero .container {
        width: 100%;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-stats {
        gap: 1.5rem;
        margin: 1.5rem 0 2rem 0;
    }

    .hero-stats .stat-number {
        font-size: 2rem;
    }

    .hero-stats .stat-label {
        font-size: 0.875rem;
    }

    .hero-buttons {
        margin-top: 2rem;
        margin-bottom: 3rem;
    }

    .btn {
        padding: 12px 30px;
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .services,
    .about,
    .contact {
        padding: 60px 0;
    }

    .service-card,
    .contact-item {
        padding: 1.5rem;
    }

    .nav-brand h2 {
        font-size: 1.25rem;
    }
}


/* 移动端适配 */
@media (max-width: 768px) {
    .translate-widget {
        margin-left: 0;
        margin-top: 1rem;
        order: 3;
        position: relative;
    }
    
    .translate-trigger {
        width: 100%;
        justify-content: center;
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    .translate-dropdown {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        border-radius: 16px;
        min-width: auto;
        max-height: 60vh;
        transform: translateY(-10px) scale(0.95);
        z-index: 1002;
    }
    
    .translate-dropdown.active {
        transform: translateY(0) scale(1);
    }
    
    .translate-dropdown::before {
        content: '';
        position: absolute;
        top: -8px;
        left: 50%;
        transform: translateX(-50%);
        width: 16px;
        height: 16px;
        background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-bottom: none;
        border-right: none;
        transform: translateX(-50%) rotate(45deg);
        border-radius: 2px;
    }
    
    .translate-options {
        max-height: 45vh;
    }
    
    .nav-menu.active {
        padding-bottom: 5rem;
        z-index: 999;
    }
}

@media (max-width: 480px) {
    .translate-dropdown {
        max-height: 50vh;
        z-index: 1003;
    }
    
    .translate-dropdown::before {
        left: 50%;
        transform: translateX(-50%) rotate(45deg);
    }
    
    .translate-options {
        max-height: 35vh;
    }
}

/* 导航栏布局调整 */
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .navbar .container {
        position: relative;
    }
    
    .nav-toggle {
        order: 2;
    }
    
    .translate-widget {
        order: 3;
        width: 100%;
        margin-top: 1rem;
    }
}


/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background: #667eea;
    color: white;
}

/* 邮件表单样式 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-left {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-form-section {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 20px;
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.contact-form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #667eea 100%);
    background-size: 200% 100%;
    animation: gradientShift 3s ease-in-out infinite;
}

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

.contact-form-container {
    padding: 2.5rem;
    position: relative;
}

.contact-form-container h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.contact-form-container h3::before {
    content: '✉️';
    font-size: 1.5rem;
}

.contact-form-container > p {
    color: #64748b;
    margin-bottom: 2.5rem;
    font-size: 1rem;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    position: relative;
}

.form-group label {
    font-weight: 600;
    color: #374151;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label::after {
    content: '';
    width: 6px;
    height: 6px;
    background: #667eea;
    border-radius: 50%;
    opacity: 0.6;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 16px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: relative;
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    background: #ffffff;
    box-shadow: 
        0 0 0 4px rgba(102, 126, 234, 0.1),
        0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
    line-height: 1.6;
    font-family: inherit;
}

.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23667eea' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 16px center;
    background-repeat: no-repeat;
    background-size: 18px;
    padding-right: 50px;
    appearance: none;
}

.form-submit {
    margin-top: 1.5rem;
    padding: 18px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    cursor: pointer;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.form-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.form-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

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

.form-submit:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.form-submit i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.form-submit:hover i {
    transform: translateX(2px);
}

/* 表单验证样式 */
.form-group input:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
    background: #fef2f2;
}

.form-group input:valid,
.form-group textarea:valid {
    border-color: #10b981;
}

/* 加载状态 */
.form-submit.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.form-submit.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-form-container {
        padding: 1.5rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 14px;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .contact-form-container {
        padding: 1.25rem;
    }
    
    .contact-form-container h3 {
        font-size: 1.25rem;
    }
    
    .form-submit {
        padding: 12px 20px;
        font-size: 0.95rem;
    }
}

/* 联系我们 - 新布局扩展样式 */
.contact-right {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.meta-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
}

.meta-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
}

.meta-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px dashed #e5e7eb;
}

.meta-item:last-child {
    border-bottom: none;
}

.meta-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 10px;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 6px 10px;
    background: #f1f5f9;
    color: #334155;
    border: 1px solid #e2e8f0;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
}

.contact-map .map-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 180px;
    background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 100%);
    color: #374151;
    border-radius: 12px;
    border: 1px dashed #c7d2fe;
}

.contact-cta p {
    color: #64748b;
    margin-bottom: 1rem;
}

.cta-button {
    width: 100%;
}

@media (max-width: 768px) {
    .contact-right {
        gap: 1.25rem;
    }
}

/* 联系我们 - 列底部对齐 */
@media (min-width: 769px) {
    .contact-content {
        align-items: stretch;
    }
    .contact-left,
    .contact-right {
        height: 100%;
    }
    .social-links {
        margin-top: auto;
    }
    .contact-cta {
        margin-top: auto;
    }
}

/* 联系我们 - 位置高度调整 */
.contact-map .map-placeholder {
    height: 390px;
}

/* 关于我们 - 图片占位区域尺寸提升（桌面端） */
@media (min-width: 768px) {
    .about .image-placeholder {
        width: 380px;
        height: 380px;
    }
}
@media (min-width: 1024px) {
    .about .image-placeholder {
        width: 420px;
        height: 420px;
    }
}

/* 强制导航栏固定定位 */
.navbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 9999 !important;
}

/* 确保导航栏容器不影响固定定位 */
.navbar .container {
    position: static !important;
}