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

body {
    font-family: 'Noto Serif SC', 'Source Han Serif CN', 'SimSun', 'STSong', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 55px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.lang-switch {
    background: #a41d13;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease;
}

.lang-switch:hover {
    background: #8a1810;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #a41d13;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-link {
    text-decoration: none;
    color: #a41d13;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #494949;
}

#hero {
    height: 100vh;
    background: linear-gradient(135deg, #4e4e4f 0%, #a41d13 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 60px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.hero-content p {
    font-size: 1.5rem;
    opacity: 0.9;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background: #f7fafc;
}

.section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #a41d13;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.about-mission {
    font-style: italic;
    margin-bottom: 40px;
    color: #a41d13;
}

.values-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.value-item {
    background: #a41d13;
    color: white;
    padding: 10px 25px;
    border-radius: 25px;
    font-weight: 500;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.strategy-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.strategy-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
}

.strategy-card h3 {
    color: #a41d13;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.team-grid {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 20px;
    -webkit-overflow-scrolling: touch;
}

.team-grid::-webkit-scrollbar {
    height: 8px;
}

.team-grid::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.team-grid::-webkit-scrollbar-thumb {
    background: #a41d13;
    border-radius: 4px;
}

.team-card {
    flex: 0 0 300px;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    scroll-snap-align: start;
}

.team-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 15px;
    border: 3px solid #a41d13;
}

.team-card h3 {
    color: #a41d13;
    margin-bottom: 5px;
}

.team-role {
    color: #a41d13;
    font-weight: 500;
    margin-bottom: 15px;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 240px));
    gap: 30px;
    justify-content: center;
}

@media (max-width: 1200px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, minmax(0, 240px));
    }
}

@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, minmax(0, 240px));
        gap: 25px;
    }
}

@media (max-width: 576px) {
    .portfolio-grid {
        grid-template-columns: minmax(0, 280px);
    }
}

.portfolio-card {
    background: white;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #a41d13;
    border-right: 4px solid #a41d13;
    overflow: hidden;
}

.portfolio-image {
    width: 140px;
    height: 140px;
    object-fit: cover;
    border-radius: 8px;
    margin: 5px auto 10px;
    display: block;
}

.portfolio-card h3 {
    color: #a41d13;
    margin-bottom: 5px;
    text-align: center;
}

.portfolio-sector {
    font-size: 0.9rem;
    color: #a41d13;
    font-weight: 500;
    margin-bottom: 5px;
    text-align: center;
}

.portfolio-description {
    color: #4a5568;
    text-align: center;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    line-height: 1;
}

.contact-item h3 {
    color: #a41d13;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.contact-item p {
    color: #4a5568;
    font-size: 1rem;
    line-height: 1.6;
}

.wechat-qr {
    width: 150px;
    height: 150px;
    margin: 15px auto;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f7fafc;
}

footer {
    background: #a41d13;
    color: white;
    text-align: center;
    padding: 20px 0;
}

@media (max-width: 768px) {
    .lang-switch {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 20px;
        gap: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section h2 {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .strategy-card,
    .team-card,
    .portfolio-card {
        padding: 20px;
    }
    
    .team-image {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    nav {
        padding: 15px;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .strategy-image,
    .portfolio-image {
        height: 150px;
    }
}