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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #FFF;
    min-height: 100vh;
}

.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background: #FFF;
    border-bottom: 1px solid #eee;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 64px;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: #666;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: #000;
    background: #f5f5f5;
}

.nav-link.active {
    color: #007AFF;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: #007AFF;
    border-radius: 50%;
}

.box {
    width: 100px;
    height: 100px;
    background: #22c55e;
    margin: 20px auto;
    border-radius: 8px;
}

.gradient-green {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
}

.container {
    display: flex;
    width: 1440px;
    max-width: 100%;
    min-height: 1024px;
    padding: 24px 240px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 86px;
    margin: 0 auto;
    background: #FFF;
}

.contact-form {
    width: 100%;
    max-width: 960px;
    background: #FFF;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.form-title {
    font-size: 32px;
    font-weight: 600;
    color: #000;
    margin-bottom: 8px;
}

.form-description {
    font-size: 16px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 8px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #FFF;
    color: #000;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #007AFF;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group select option {
    color: #000;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.submit-button {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    color: #FFF;
    background: #007AFF;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    align-self: flex-start;
    margin-top: 8px;
}

.submit-button:hover {
    background: #0056CC;
}

.submit-button:active {
    background: #004299;
}

/* Responsive Design */
@media (max-width: 1440px) {
    .container {
        width: 100%;
        padding: 24px 120px;
    }
    
    .nav-container {
        padding: 0 120px;
    }
}

@media (max-width: 1024px) {
    .container {
        padding: 24px 60px;
        min-height: 100vh;
    }
    
    .nav-container {
        padding: 0 60px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 24px 32px;
        gap: 48px;
    }
    
    .nav-container {
        padding: 0 32px;
        height: 56px;
    }
    
    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        font-size: 14px;
        padding: 6px 12px;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .form-title {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 16px;
        gap: 32px;
    }
    
    .nav-container {
        padding: 0 16px;
        height: 56px;
    }
    
    .nav-links {
        gap: 12px;
        width: 100%;
        justify-content: space-around;
    }
    
    .nav-link {
        font-size: 14px;
        padding: 6px 8px;
        flex: 1;
        text-align: center;
    }
    
    .contact-form {
        padding: 20px;
        gap: 24px;
    }
    
    .form-title {
        font-size: 24px;
    }
    
    .form-description {
        font-size: 14px;
    }
}