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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: none;
}

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

.nav-logo h2 {
    color: #fff;
    font-weight: 700;
    font-size: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    padding: 8px 16px;
    border-radius: 20px;
}

.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    transform: translateY(-1px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: #fff;
    transition: width 0.3s ease;
    border-radius: 1px;
}

.nav-link:hover::after {
    width: 80%;
}

/* 滚动后的导航栏样式 */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(15px) !important;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.15) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08) !important;
}

.navbar.scrolled .nav-logo h2 {
    color: #1f2937 !important;
    text-shadow: none !important;
    font-weight: 700 !important;
}

.navbar.scrolled .nav-link {
    color: #374151 !important;
    text-shadow: none !important;
    font-weight: 500 !important;
}

.navbar.scrolled .nav-link:hover {
    color: #2563eb !important;
    background: rgba(37, 99, 235, 0.1) !important;
    transform: translateY(-1px);
}

.navbar.scrolled .bar {
    background: #374151 !important;
    box-shadow: none !important;
}

/* 确保默认状态下的样式优先级 */
.navbar:not(.scrolled) {
    background: transparent !important;
    backdrop-filter: none !important;
    box-shadow: none !important;
    border-bottom: none !important;
}

.navbar:not(.scrolled) .nav-logo h2 {
    color: #fff !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
    font-weight: 700 !important;
}

.navbar:not(.scrolled) .nav-link {
    color: #fff !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3) !important;
    font-weight: 500 !important;
}

.navbar:not(.scrolled) .nav-link:hover {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.15) !important;
    transform: translateY(-1px);
}

.navbar:not(.scrolled) .bar {
    background: #fff !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3) !important;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #fff;
    margin: 3px 0;
    transition: 0.3s;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 首页横幅样式 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

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

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

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

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

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

.hero-graphic {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 300px;
}

.tech-icon {
    font-size: 3rem;
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    animation: float 3s ease-in-out infinite;
}

.tech-icon:nth-child(2) {
    animation-delay: 0.5s;
}

.tech-icon:nth-child(3) {
    animation-delay: 1s;
}

.tech-icon:nth-child(4) {
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们样式 */
.about {
    padding: 80px 0;
    background: #f9fafb;
}

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

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #4b5563;
    line-height: 1.7;
}

.company-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.info-item h4 {
    color: #2563eb;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-item p {
    color: #6b7280;
    font-weight: 500;
}

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

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.placeholder-content {
    text-align: center;
}

.placeholder-content h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.placeholder-content p {
    opacity: 0.9;
}

/* 服务项目样式 */
.services {
    padding: 80px 0;
    background: #fff;
}

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

.service-card {
    background: #fff;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.service-card p {
    color: #6b7280;
    line-height: 1.6;
}

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

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23e2e8f0" opacity="0.3"/><circle cx="75" cy="75" r="1" fill="%23cbd5e1" opacity="0.2"/><circle cx="50" cy="10" r="0.5" fill="%23f1f5f9" opacity="0.4"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 5rem;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.contact-qr {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
}

.contact-qr.animate {
    animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.qr-code {
    background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(37, 99, 235, 0.1);
    position: relative;
    overflow: hidden;
}

.qr-code::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #3b82f6, #60a5fa);
    border-radius: 20px 20px 0 0;
}

.qr-code:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-color: rgba(37, 99, 235, 0.2);
}

.qr-image {
    width: 200px;
    height: 200px;
    border-radius: 16px;
    object-fit: cover;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
    border: 3px solid #fff;
}

.qr-image:hover {
    transform: scale(1.05);
}

.qr-text {
    margin: 0;
    font-size: 1rem;
    color: #374151;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 5px solid #2563eb;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #2563eb, #3b82f6, #60a5fa);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-left-color: #1d4ed8;
    background: linear-gradient(135deg, #fff 0%, #f1f5f9 100%);
}

.contact-item:hover::before {
    opacity: 1;
}

.contact-icon {
    font-size: 1.8rem;
    margin-right: 1.2rem;
    margin-top: 0.2rem;
    color: #2563eb;
    flex-shrink: 0;
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.2));
}

.contact-item:hover .contact-icon {
    transform: scale(1.1);
    color: #1d4ed8;
}

.contact-details {
    flex: 1;
}

.contact-details h4 {
    margin-bottom: 0.8rem;
    color: #1f2937;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.contact-details p {
    color: #374151;
    line-height: 1.6;
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.2px;
}

.contact-info {
    position: relative;
    z-index: 1;
}

.contact-info.animate .contact-item {
    animation: slideInRight 0.6s ease-out;
    animation-fill-mode: both;
}

.contact-info.animate .contact-item:nth-child(1) { animation-delay: 0.1s; }
.contact-info.animate .contact-item:nth-child(2) { animation-delay: 0.2s; }
.contact-info.animate .contact-item:nth-child(3) { animation-delay: 0.3s; }
.contact-info.animate .contact-item:nth-child(4) { animation-delay: 0.4s; }

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.contact-form {
    background: #fff;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

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

/* 页脚样式 */
.footer {
    background: #1f2937;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #fff;
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #2563eb;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright p {
    color: #9ca3af;
    margin: 0;
}

.footer-icp p {
    color: #9ca3af;
    margin: 0;
    font-size: 0.9rem;
}

.footer-icp a {
    color: #2563eb;
    text-decoration: none;
}

.footer-icp a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
    }

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

    .nav-menu li {
        margin: 1rem 0;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

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

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

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        max-width: none;
        padding: 0;
    }
    
    .contact-qr {
        order: -1;
        margin-bottom: 1rem;
    }
    
    .qr-code {
        padding: 1.5rem;
    }
    
    .qr-image {
        width: 150px;
        height: 150px;
    }
    
    .contact-item {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .contact-icon {
        font-size: 1.2rem;
        margin-right: 0.8rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

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

    .company-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: #2563eb;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1d4ed8;
}