/* 起盛智能官方网站样式 */
/* 设计理念：专业、克制、技术感 */

:root {
    /* 主色调 - 专业蓝灰系 */
    --primary-color: #1a365d;
    --secondary-color: #2d3748;
    --accent-color: #3182ce;
    --accent-light: #4299e1;
    
    /* 中性色 */
    --light-gray: #f7fafc;
    --medium-gray: #e2e8f0;
    --dark-gray: #4a5568;
    --text-color: #2d3748;
    --text-light: #718096;
    
    /* 功能色 */
    --success-color: #38a169;
    --warning-color: #d69e2e;
    --danger-color: #e53e3e;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 圆角 */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--primary-color);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-subtext {
    font-size: 0.75rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
    position: relative;
}

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

.nav-link.cta-nav {
    background-color: var(--accent-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius-md);
    transition: background-color 0.2s;
}

.nav-link.cta-nav:hover {
    background-color: var(--accent-light);
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding: 12rem 0 6rem;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(49, 130, 206, 0.05) 100%);
    z-index: 0;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.main-headline {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.sub-headline {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.primary-cta, .secondary-cta {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
}

.primary-cta {
    background-color: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.primary-cta:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.secondary-cta {
    background-color: white;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.secondary-cta:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--medium-gray);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* About Section */
.about-section {
    padding: var(--spacing-xl) 0;
    background-color: white;
}

.about-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--dark-gray);
    text-align: center;
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.core-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-item {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    background-color: var(--light-gray);
    transition: transform 0.2s, box-shadow 0.2s;
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.value-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.value-item p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Solutions Section */
.solutions-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-gray);
}

.solutions-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.solution-card {
    background-color: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--medium-gray);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.solution-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.solution-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-right: var(--spacing-sm);
    margin-top: 0.25rem;
}

.solution-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    flex: 1;
    margin-bottom: 0.5rem;
}

.solution-tag {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.solution-pain {
    background-color: #fff5f5;
    border-left: 4px solid var(--danger-color);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.solution-pain strong {
    color: var(--danger-color);
}

.solution-description p {
    color: var(--dark-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.solution-features {
    list-style: none;
}

.solution-features li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    display: flex;
    align-items: flex-start;
}

.solution-features li i {
    color: var(--success-color);
    margin-right: 0.5rem;
    margin-top: 0.25rem;
    font-size: 0.9rem;
}

/* Technology Section */
.technology-section {
    padding: var(--spacing-xl) 0;
    background-color: white;
}

.technology-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.tech-item {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    background-color: var(--light-gray);
    border: 1px solid var(--medium-gray);
    transition: transform 0.2s;
}

.tech-item:hover {
    transform: translateY(-3px);
}

.tech-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.tech-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.tech-item p {
    color: var(--dark-gray);
    line-height: 1.7;
}

.tech-footnote {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: #f0f9ff;
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--accent-color);
}

.tech-footnote p {
    color: var(--primary-color);
    line-height: 1.8;
}

/* Footer */
.footer-section {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.footer-subtitle {
    color: #a0aec0;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    font-size: 1rem;
    color: #cbd5e0;
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    transition: background-color 0.2s;
}

.social-link:hover {
    background-color: var(--accent-color);
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.company-address {
    margin-bottom: var(--spacing-lg);
}

.address-item {
    display: flex;
    align-items: flex-start;
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.address-icon {
    font-size: 1.5rem;
    color: var(--accent-light);
    margin-right: var(--spacing-sm);
    margin-top: 0.25rem;
}

.address-details h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: white;
}

.address-details p {
    color: #cbd5e0;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 二维码样式 */
.qr-code-container {
    margin: 0.5rem 0;
}

.qr-code-placeholder {
    width: 140px;
    height: 140px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: 2px solid var(--accent-color);
}

.qr-code-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.contact-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-light);
    text-align: center;
    margin-bottom: 0.5rem;
}

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

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent-light);
    margin-right: var(--spacing-sm);
    margin-top: 0.25rem;
}

.contact-details h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-number, .contact-email, .wechat-link {
    color: #cbd5e0;
    text-decoration: none;
    font-size: 1rem;
}

.wechat-link:hover {
    color: white;
    text-decoration: underline;
}

.contact-note {
    font-size: 0.875rem;
    color: #a0aec0;
    margin-top: 0.25rem;
}

.consultation-cta {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-text {
    color: #cbd5e0;
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    text-align: center;
}

.cta-text strong {
    color: white;
}

.wechat-consultation {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.qr-code-container {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.qr-code-placeholder {
    width: 160px;
    height: 160px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
    padding: 10px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--accent-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.qr-code-placeholder:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.qr-code-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
    cursor: pointer;
}

.contact-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-light);
    text-align: center;
    margin-bottom: 0.25rem;
}

.qr-note {
    font-size: 0.9rem;
    color: #a0aec0;
    text-align: center;
    margin-top: 0.5rem;
}

.consultation-buttons {
    text-align: center;
}

.consultation-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(49, 130, 206, 0.3);
}

.consultation-button:hover {
    background-color: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(49, 130, 206, 0.4);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
    color: #a0aec0;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-headline {
        font-size: 2.75rem;
    }
    
    .solution-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .core-values {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .main-headline {
        font-size: 2.25rem;
    }
    
    .sub-headline {
        font-size: 1.125rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .primary-cta, .secondary-cta {
        width: 100%;
        text-align: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .core-values {
        grid-template-columns: 1fr;
    }
    
    .hero-section {
        padding: 8rem 0 4rem;
    }
    
    .about-section h2,
    .solutions-section h2,
    .technology-section h2 {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .solution-card,
    .tech-item {
        padding: var(--spacing-md);
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .main-headline {
        font-size: 1.875rem;
    }
    
    .sub-headline {
        font-size: 1rem;
    }
    
    .about-content p,
    .solution-description p,
    .tech-item p {
        font-size: 0.95rem;
    }
    
    .value-item,
    .solution-card,
    .tech-item {
        padding: var(--spacing-sm);
    }
}