Isometric view drawing of a signal base station and a smartphone. The base station is a truss-type communication tower with a spherical signal transmitter at the top; the smartphone has a flat rectangular touch screen. The two are connected by blue light. Scenario: Deep dark blue virtual network communication space, with tiny scattered light points distributed in the background to simulate the digital universe, and a circular diffusing halo at the bottom of the base station. Style: Flat vector technology illustration style, isometric three-dimensional perspective effect, no real physical texture, completely abstract technology visual expression. Color tone: Mainly use different shades of blue as the main color, with bright cyan-blue as highlights. Overall cool tone with electronic luminous visual effect. Lighting: Overall self-luminous soft halo effect. Signal lines emitted by the base station, the circular halo at the base of the base station, and the annular ripple at the center of the smartphone screen all have soft glow. No real light source shadows; volume and layers are only distinguished by brightness. Composition: Centered-offset balanced composition, with the signal base station located at the lower left of the frame and the smartphone at the upper right of the frame. The two are connected by a diagonal line forming a stable visual flow. The layout is concise and clear, highlighting the connection between the two. Purpose: For technical publicity materials showing mobile communication technology, wireless network connection, 5G and other data transmission topics; suitable as illustrations for technical content.