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

:root {
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --text-dark: #111827;
    --text-medium: #4b5563;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-subtle: #f3f4f6;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

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

.nav-logo h2 {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--text-dark);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.nav-logo-img {
    width: 36px !important;
    height: 36px !important;
    max-width: 36px !important;
    max-height: 36px !important;
    border-radius: 8px;
    object-fit: contain;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.938rem;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-menu a:hover {
    color: var(--text-dark);
    background: var(--bg-subtle);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* 主页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--bg-white);
    color: var(--text-dark);
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 70%;
    height: 150%;
    background: linear-gradient(135deg, var(--bg-subtle) 0%, var(--bg-light) 100%);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
    z-index: 2;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-subtle);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-medium);
    margin-bottom: 24px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-medium);
    max-width: 560px;
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.938rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--text-dark);
    color: white;
}

.btn-primary:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-subtle);
    border-color: var(--text-medium);
}

.hero-visual {
    position: absolute;
    right: 0;
    top: 0;
    width: 45%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.hero-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
    transform: perspective(1000px) rotateY(-8deg) rotateX(5deg);
}

.hero-card {
    background: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.hero-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.hero-card-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.hero-card-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.hero-card-desc {
    font-size: 0.875rem;
    color: var(--text-medium);
}

/* 服务项目 */
.services {
    padding: 120px 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-medium);
    line-height: 1.7;
}

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

.service-card {
    background: var(--bg-white);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--text-dark);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--text-dark);
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--text-dark);
    color: white;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-medium);
    line-height: 1.7;
    font-size: 0.938rem;
}

/* 关于我们 */
.about {
    padding: 120px 0;
    background: var(--bg-light);
}

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

.about-text h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.063rem;
}

.about-image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.about-image-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.about-image-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.about-image-item:nth-child(2) {
    margin-top: 40px;
}

.about-image-item i {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.about-image-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.about-image-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.stats {
    display: flex;
    gap: 48px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.938rem;
    color: var(--text-medium);
}

/* 案例展示 */
.portfolio {
    padding: 120px 0;
    background: var(--bg-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 32px;
}

.portfolio-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.portfolio-image {
    height: 220px;
    background: var(--bg-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.03));
}

.portfolio-info {
    padding: 28px;
}

.portfolio-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.portfolio-info p {
    color: var(--text-medium);
    line-height: 1.7;
    font-size: 0.938rem;
}

.portfolio-tags {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.portfolio-tag {
    padding: 6px 12px;
    background: var(--bg-subtle);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--text-medium);
    font-weight: 500;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-info h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.contact-info > p {
    color: var(--text-medium);
    font-size: 1.063rem;
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    font-size: 1.25rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.contact-item-content h4 {
    font-size: 0.938rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.contact-item-content p {
    color: var(--text-medium);
    font-size: 0.938rem;
}

.contact-form {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.938rem;
    transition: all var(--transition-fast);
    background: var(--bg-white);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-dark);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
    justify-content: center;
    padding: 16px;
    font-size: 1rem;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

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

.footer-logo-icon {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    font-weight: 700;
}

.footer-logo-img {
    width: 40px !important;
    height: 40px !important;
    max-width: 40px !important;
    max-height: 40px !important;
    border-radius: var(--radius-sm);
    object-fit: contain;
    display: block;
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: 600;
}

.footer-brand p {
    color: #9ca3af;
    font-size: 0.938rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    color: white;
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-section ul li a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.938rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid #374151;
    text-align: center;
    color: #9ca3af;
    font-size: 0.875rem;
}

.footer-links {
    margin: 16px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
}

.footer-link {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-separator {
    color: #6b7280;
    font-size: 0.75rem;
}

.beian-container {
    margin-top: 16px;
    text-align: center;
}

.beian-link {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.beian-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* 备用图标样式 - 如果Font Awesome加载失败 */
.fas {
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
}

/* 电话图标 */
.fas.fa-phone::before {
    content: "📞";
    font-size: 1em;
}

/* 邮箱图标 */
.fas.fa-envelope::before {
    content: "✉️";
    font-size: 1em;
}

/* 地址图标 */
.fas.fa-map-marker-alt::before {
    content: "📍";
    font-size: 1em;
}

/* 箭头图标 */
.fas.fa-arrow-right::before {
    content: "→";
    font-size: 1em;
}

/* 纸飞机图标 */
.fas.fa-paper-plane::before {
    content: "📧";
    font-size: 1em;
}

/* 笔记本电脑图标 */
.fas.fa-laptop-code::before {
    content: "💻";
    font-size: 1em;
}

/* 手机图标 */
.fas.fa-mobile-alt::before {
    content: "📱";
    font-size: 1em;
}

/* 服务器图标 */
.fas.fa-server::before {
    content: "🖥️";
    font-size: 1em;
}

/* 云图标 */
.fas.fa-cloud::before {
    content: "☁️";
    font-size: 1em;
}

/* 图表图标 */
.fas.fa-chart-line::before {
    content: "📊";
    font-size: 1em;
}

/* 盾牌图标 */
.fas.fa-shield-alt::before {
    content: "🛡️";
    font-size: 1em;
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .hero-content {
        max-width: 700px;
    }

    .about-content {
        gap: 60px;
    }

    .contact-content {
        gap: 60px;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 72px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        transition: var(--transition-normal);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 0;
    }

    .hero-content {
        padding: 100px 24px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-image-grid {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }

    .about-image-item:nth-child(2) {
        margin-top: 0;
    }

    .stats {
        flex-wrap: wrap;
        gap: 32px;
    }

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

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand p {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .nav-container {
        padding: 0 16px;
    }

    .hero-content {
        padding: 80px 16px;
    }

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

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

    .service-card {
        padding: 24px;
    }

    .about-image-grid {
        gap: 16px;
    }

    .about-image-item {
        padding: 24px;
    }

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