/* @budding: 基础与主题变量 */
:root { 
    --bg-color: #f0f2f5; 
    --primary-color: #1a1a1a; 
    --secondary-color: #595959; 
    --accent-color: #40a9ff;  
    --text-color: #1a1a1a; 
    --white-color: #fff;
    --border-radius: 18px;
    --phone-corner-radius: 0px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --top-pinned-bg: #f7f7f7; 
    --online-status-color: #4CAF50;
}
*, *::before, *::after { box-sizing: border-box; }
body { 
    font-family: var(--font-family); margin: 0; padding: 0; 
    background: #e9e9e9; display: flex; align-items: center; 
    justify-content: center; min-height: 100vh; 
}
::-webkit-scrollbar { display: none; }
html, body { scrollbar-width: none; -ms-overflow-style: none; }