/* 全局 CSS 变量系统 */

:root {
    /* 基础颜色 - 默认 Light Theme */
    --bg-base: #f0f4f8;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    
    /* 玻璃拟态颜色 */
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: rgba(0, 0, 0, 0.05);
    
    /* 强调色 */
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    /* 圆角与模糊 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --blur-strength: 16px;
    
    /* 背景发光球 */
    --orb-color-1: rgba(59, 130, 246, 0.4);
    --orb-color-2: rgba(139, 92, 246, 0.4);
    --orb-color-3: rgba(236, 72, 153, 0.4);

    /* 业务场景色 - 增强真实感 */
    --color-gov-red: #ed1b24;
    --color-academic-blue: #2563eb;
    --color-business-green: #10b981;
    --color-tech-purple: #8b5cf6;
    --mockup-border: rgba(255, 255, 255, 0.1);
}

/* 深色模式 Dark Theme */
[data-theme="dark"] {
    --bg-base: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.4);
    
    --accent-primary: #60a5fa;
    --accent-secondary: #a78bfa;
    
    --orb-color-1: rgba(59, 130, 246, 0.2);
    --orb-color-2: rgba(139, 92, 246, 0.2);
    --orb-color-3: rgba(236, 72, 153, 0.2);
}

/* OLED 纯黑模式 */
[data-theme="black"] {
    --bg-base: #000000;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    
    --glass-bg: rgba(24, 24, 27, 0.5);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-shadow: rgba(0, 0, 0, 0.8);
    
    --orb-color-1: rgba(59, 130, 246, 0.15);
    --orb-color-2: rgba(139, 92, 246, 0.15);
    --orb-color-3: rgba(236, 72, 153, 0.15);
}

/* 字体排版 */
html {
    font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* 通用工具类 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    font-weight: 700;
    line-height: 1.3;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

*, *::before, *::after {
    box-sizing: border-box;
}