/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-gradient: linear-gradient(135deg, #2563eb, #3b82f6);
    --text-dark: #1e293b;
    --text-light: #64748b;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    padding: 6rem 0;
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.hero-main-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.25rem;
    color: var(--text-light);
}

/* Infrastructure Section */
.infrastructure {
    padding: 6rem 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 2rem;
    max-width: 100%;
}

.feature-card:nth-child(1) { grid-column: 1 / 3; grid-row: 1; }  /* 第一行，占2列 */
.feature-card:nth-child(2) { grid-column: 3 / 4; grid-row: 1; }  /* 第一行，占1列 */
.feature-card:nth-child(3) { grid-column: 1 / 2; grid-row: 2; }  /* 第二行，第1列 */
.feature-card:nth-child(4) { grid-column: 2 / 3; grid-row: 2; }  /* 第二行，第2列 */
.feature-card:nth-child(5) { grid-column: 3 / 4; grid-row: 2; }  /* 第二行，第3列 */

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

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

.feature-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    flex-shrink: 0;
}

.feature-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
    flex-grow: 1;
}

/* Product Service Section */
.product-service {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: var(--white);
}

.product-service .section-header h2,
.product-service .section-header p {
    color: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 100%;
}

.product-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    color: var(--text-dark);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

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

.product-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    flex-shrink: 0;
}

.product-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.product-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.product-card p {
    color: var(--text-light);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 1rem;
}

/* Global Coverage Section */
.global-coverage {
    padding: 6rem 0;
    background: var(--white);
}

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

.coverage-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.coverage-text p {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.coverage-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.4;
}

.world-map {
    position: relative;
    width: 400px;
    height: 300px;
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.map-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.map-pin {
    position: absolute;
    width: 40px;
    height: 40px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.map-pin.usa {
    top: 20%;
    left: 20%;
}

.map-pin.japan {
    top: 30%;
    right: 25%;
}

.map-pin.thailand {
    bottom: 30%;
    left: 30%;
}

.map-pin.india {
    bottom: 20%;
    right: 20%;
}

.flag {
    font-size: 1.5rem;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background: var(--gray-50);
}

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

.cta-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.cta-text p {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.6;
}

.cta-button {
    text-align: center;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 4rem 0 2rem;
}

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

.footer-column h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

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

.footer-column ul li {
    margin-bottom: 0.75rem;
    color: var(--gray-300);
}

.footer-column ul li a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.qr-code {
    display: flex;
    justify-content: center;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-300);
    color: var(--gray-300);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo-img {
        height: 50px;
    }
    
    .company-name {
        font-size: 1rem;
        text-align: center;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-image {
        height: 300px;
    }
    
    .coverage-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .coverage-stats {
        grid-template-columns: 1fr;
    }
    
    .cta-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto auto auto;
        gap: 1.5rem;
    }
    
    .feature-card:nth-child(1) {
        grid-column: 1;
        grid-row: 1;
    }
    
    .feature-card:nth-child(2) {
        grid-column: 1;
        grid-row: 2;
    }
    
    .feature-card:nth-child(3) {
        grid-column: 1;
        grid-row: 3;
    }
    
    .feature-card:nth-child(4) {
        grid-column: 1;
        grid-row: 4;
    }
    
    .feature-card:nth-child(5) {
        grid-column: 1;
        grid-row: 5;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .world-map {
        width: 100%;
        max-width: 400px;
        height: 250px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0;
    }
    
    .infrastructure,
    .product-service,
    .global-coverage,
    .cta-section {
        padding: 4rem 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .logo-img {
        height: 45px;
    }
    
    .company-name {
        font-size: 0.9rem;
    }
    
    .hero-image {
        height: 250px;
    }
    
    .features-grid {
        gap: 1rem;
    }
    
    .feature-card {
        min-height: 250px;
        padding: 1.5rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .product-card {
        min-height: 250px;
        padding: 1.5rem;
    }
} 

.company-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
    line-height: 1.2;
}