/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

/* 主题色调变量 */
:root {
    --primary-blue: #0099FF;
    --secondary-blue: #007ACC;
    --light-blue: #33AAFF;
    --accent-blue: #0066CC;
    --bg-light: #f8f9fa;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #e0e0e0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 16px;
    position: relative;
    transition: color 0.3s ease;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: all 0.3s ease;
}

/* 主Banner区域 */
.hero-banner {
    margin-top: 70px;
    padding: 140px 0;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.2)), 
                url('image/bgimg.jpg') center/cover;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 420px;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 153, 255, 0.1) 0%, rgba(0, 122, 204, 0.1) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 15px;
    opacity: 0.9;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    opacity: 0.8;
    font-weight: 400;
}

.highlight {
    color: var(--primary-blue);
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    border-radius: 2px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    box-shadow: 0 4px 15px rgba(31, 78, 121, 0.3);
}

.btn-primary:hover {
    background: var(--secondary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(31, 78, 121, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-banner-1 {
    width: 100%;
    max-width: 500px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: float 3s ease-in-out infinite;
}

.banner-svg {
    width: 100%;
    height: auto;
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 通用部分样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 15px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 服务区域 */
.services-section {
    padding: 100px 0;
    background: #ffffff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

@media (max-width: 1200px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.service-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 20px;
    background: #ffffff;
    border: 1px solid #e8f4fd;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(46, 134, 171, 0.05), transparent);
    transition: left 0.5s ease;
}

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

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(31, 78, 121, 0.15);
    border-color: var(--primary-blue);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fbff, #e8f4fd);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
}

.service-card:hover .service-icon svg {
    filter: brightness(0) invert(1);
}

.service-icon svg {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.service-card p {
    color: #666;
    line-height: 1.6;
}



/* 解决方案区域 */
.solutions-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fbff 0%, #ffffff 100%);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.solution-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 20px;
    border: 1px solid #e8f4fd;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.solution-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.solution-card:hover::after {
    transform: scaleX(1);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(31, 78, 121, 0.15);
}

.solution-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fbff, #e8f4fd);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.solution-card:hover .solution-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    transform: rotate(5deg);
}

.solution-card:hover .solution-icon svg {
    filter: brightness(0) invert(1);
}

.solution-icon svg {
    width: 35px;
    height: 35px;
}

.solution-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.solution-card p {
    color: #666;
    line-height: 1.6;
}

/* 关于我们区域 */
.about-section {
    padding: 100px 0;
    background: #ffffff;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text .section-header {
    text-align: left;
    margin-bottom: 40px;
}

.about-text .section-title::after {
    left: 0;
    transform: none;
}

.about-description {
    margin-bottom: 40px;
}

.about-description p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background: linear-gradient(135deg, #f8fbff, #e8f4fd);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
}

.stat-item:hover .stat-number,
.stat-item:hover .stat-label {
    color: white;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    display: block;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 400px;
}

.tech-item {
    text-align: center;
    padding: 30px 20px;
    background: #ffffff;
    border: 2px solid #e8f4fd;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.tech-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(31, 78, 121, 0.15);
}

.tech-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
}

.tech-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: #333;
}

/* 成功案例区域 */
.cases-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fbff 0%, #ffffff 100%);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.case-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 20px;
    border: 1px solid #e8f4fd;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(46, 134, 171, 0.02), rgba(168, 230, 207, 0.02));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(31, 78, 121, 0.15);
    border-color: var(--primary-blue);
}

.case-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fbff, #e8f4fd);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.case-card:hover .case-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    transform: scale(1.1);
}

.case-card:hover .case-icon svg {
    filter: brightness(0) invert(1);
}

.case-icon svg {
    width: 35px;
    height: 35px;
}

.case-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.case-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-results {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.result-tag {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: white;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 联系我们区域 */
.contact-section {
    padding: 100px 0;
    background: #ffffff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: linear-gradient(135deg, #f8fbff, #e8f4fd);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 25px rgba(31, 78, 121, 0.1);
}

.contact-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(31, 78, 121, 0.1);
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 8px;
}

.contact-details p {
    color: #666;
    font-size: 1rem;
}

.contact-form {
    background: #ffffff;
    padding: 40px;
    border-radius: 20px;
    border: 1px solid #e8f4fd;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-form h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 30px;
    text-align: center;
}

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

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

.form-group label {
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 15px;
    border: 2px solid #e8f4fd;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fafbfc;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(31, 78, 121, 0.1);
}

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

.form button {
    margin-top: 15px;
    align-self: center;
    min-width: 200px;
}

/* 页脚样式 */
.footer {
    background: #1a1a1a;
    color: #ffffff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-logo .logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
}

.footer-description {
    color: #cccccc;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.footer-column h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #ffffff;
}

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

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

.footer-column ul li a {
    color: #cccccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--light-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #ffffff;
    font-size: 11px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-banner {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-text .section-header {
        text-align: center;
    }
    
    .about-text .section-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

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

    .nav-toggle {
        display: flex;
    }

    .hero-banner {
        padding: 120px 0;
        min-height: 370px;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
        max-width: 300px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
}

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

    .hero-banner {
        padding: 100px 0;
        min-height: 320px;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-description {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .service-card,
    .solution-card,
    .case-card {
        padding: 30px 20px;
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 14px;
    }
}

/* 高亮和焦点状态 */
.nav-link:focus,
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* 页面加载动画 */
.service-card,
.solution-card,
.case-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }

.solution-card:nth-child(1) { animation-delay: 0.1s; }
.solution-card:nth-child(2) { animation-delay: 0.2s; }
.solution-card:nth-child(3) { animation-delay: 0.3s; }
.solution-card:nth-child(4) { animation-delay: 0.4s; }
.solution-card:nth-child(5) { animation-delay: 0.5s; }
.solution-card:nth-child(6) { animation-delay: 0.6s; }

.case-card:nth-child(1) { animation-delay: 0.1s; }
.case-card:nth-child(2) { animation-delay: 0.2s; }
.case-card:nth-child(3) { animation-delay: 0.3s; }
.case-card:nth-child(4) { animation-delay: 0.4s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-blue);
}