/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background: #ffffff;
    overflow-x: hidden;
    font-weight: 400;
    letter-spacing: -0.01em;
    font-size: 16px;
    scroll-behavior: smooth;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo h2 {
    color: #1f2937;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

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

.nav-link {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: -0.01em;
}

.nav-link:hover {
    color: #0891b2;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #0891b2;
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #1f2937;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页横幅样式 */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(8, 145, 178, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(5, 150, 105, 0.08) 0%, transparent 50%);
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #1f2937;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: #6b7280;
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    padding: 14px 28px;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 1rem;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0891b2 0%, #059669 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(8, 145, 178, 0.25);
    margin-top: 2rem;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.35);
}



/* 通用区块样式 */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1f2937;
    position: relative;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #0891b2 0%, #059669 100%);
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h3 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #6b7280;
    line-height: 1.7;
    font-size: 1.1rem;
    font-weight: 400;
}



.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.value-propositions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: #f9fafb;
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.value-item:hover {
    background: #f3f4f6;
    border-color: #10b981;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.1);
}

.value-item i {
    font-size: 1.5rem;
    color: #10b981;
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.value-item h4 {
    margin: 0 0 0.5rem 0;
    color: #111827;
    font-size: 1rem;
}

.value-item p {
    margin: 0;
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.4;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, #0891b2, #059669);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #0891b2;
}

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

.stat h4 {
    font-size: 2.5rem;
    color: #0891b2;
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.stat p {
    color: #6b7280;
    font-weight: 500;
    font-size: 0.95rem;
    margin: 0;
}

/* 服务样式 */
.services {
    background: #ffffff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 3rem;
}

.service-card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #059669);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: #0891b2;
}

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

.service-features {
    text-align: left;
    margin: 1.5rem 0;
    padding-left: 0;
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #6b7280;
    font-size: 0.9rem;
}

.service-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.service-timeline {
    margin-top: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.1));
    border-radius: 8px;
    font-size: 0.85rem;
    color: #374151;
    text-align: left;
}

.service-timeline strong {
    color: #059669;
}



.service-card h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.service-card p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}



/* 案例展示样式 */
.cases {
    background: #f9fafb;
    padding: 5rem 0;
}

.section-subtitle {
    text-align: center;
    color: #6b7280;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.case-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #059669);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

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

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.case-header h3 {
    color: #1f2937;
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0;
    flex: 1;
    min-width: 200px;
}

.case-category {
    background: linear-gradient(135deg, #0891b2, #059669);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

.case-content p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.case-results {
    display: grid;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.result-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background: #f8fafc;
    border-radius: 8px;
    border-left: 3px solid #0891b2;
}

.result-item strong {
    color: #1f2937;
    margin-right: 0.5rem;
    min-width: 120px;
}

.case-timeline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #059669;
    font-weight: 500;
    font-size: 0.9rem;
}

.case-timeline i {
    font-size: 1rem;
}

/* 联系我们样式 */
.contact {
    background: #ffffff;
}

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

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

.contact-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.contact-section h3 {
    color: #059669;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.contact-section p {
    color: #6b7280;
    line-height: 1.6;
    margin: 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border-color: #0891b2;
}

.contact-item .icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #0891b2, #059669);
    color: #ffffff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    color: #1f2937;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.contact-item p {
    color: #6b7280;
    margin: 0;
    font-size: 1rem;
    line-height: 1.5;
}

.contact-item a {
    color: #10b981;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #059669;
    text-decoration: underline;
}

.consultation-link {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 5px;
    color: #ffffff !important;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.consultation-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3);
    text-decoration: none !important;
}

.contact-form {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid #e5e7eb;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    background: #ffffff;
    color: #1f2937;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0891b2;
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, #0891b2 0%, #059669 100%);
    color: #ffffff;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

/* 页脚样式 */
.footer {
    background: #1f2937;
    color: #ffffff;
    padding: 4rem 0 2rem;
}

.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: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.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;
    font-size: 0.95rem;
}

.footer-section ul li a:hover {
    color: #0891b2;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.social-links a:hover {
    background: #0891b2;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        text-align: center;
    }

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

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

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

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

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

    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        max-width: none;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .case-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .case-header h3 {
        font-size: 1.2rem;
        min-width: auto;
    }
    
    .result-item {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    
    .result-item strong {
        min-width: auto;
        margin-bottom: 0.25rem;
    }

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


}

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

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

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

    .container {
        padding: 0 16px;
    }

    section {
        padding: 60px 0;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .service-card,
    .contact-form {
        padding: 2rem;
    }
}