/* ===== ROYIN 共享样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-card: #21262D;
    --circuit-green: #00FF9C;
    --unity-blue: #00D4FF;
    --accent-purple: #BD93F9;
    --accent-orange: #FF9F43;
    --text-primary: #E6EDF3;
    --text-secondary: #8B949E;
    --border-color: #30363D;
}
html { scroll-behavior: smooth; }
body {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 粒子画布 ===== */
#particle-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===== 导航栏 ===== */
nav {
    position: fixed;
    top: 0; width: 100%;
    padding: 1rem 2rem;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(12px);
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}
.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--circuit-green);
    text-shadow: 0 0 10px rgba(0, 255, 156, 0.5);
    text-decoration: none;
    cursor: pointer;
}
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--circuit-green);
    text-shadow: 0 0 8px rgba(0, 255, 156, 0.5);
}

/* ===== 按钮 ===== */
.btn-pcb {
    position: relative;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 1px solid var(--circuit-green);
    color: var(--circuit-green);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}
.btn-pcb:hover {
    background: rgba(0, 255, 156, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 156, 0.3);
}
.btn-unity {
    border-color: var(--unity-blue);
    color: var(--unity-blue);
}
.btn-unity:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* ===== 技术标签 ===== */
.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}
.tech-badge {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
}
.tech-badge.green { border-color: var(--circuit-green); color: var(--circuit-green); }
.tech-badge.blue { border-color: var(--unity-blue); color: var(--unity-blue); }
.tech-badge.purple { border-color: var(--accent-purple); color: var(--accent-purple); }
.tech-badge.orange { border-color: var(--accent-orange); color: var(--accent-orange); }
.tech-badge.red { border-color: #FF6B6B; color: #FF6B6B; }
.tech-badge.pink { border-color: #FF79C6; color: #FF79C6; }
.tech-badge.yellow { border-color: #F1FA8C; color: #F1FA8C; }
.tech-badge.cyan { border-color: #8BE9FD; color: #8BE9FD; }

/* ===== 页脚 ===== */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

/* ===== 齿轮动画 ===== */
.gear-icon {
    display: inline-block;
    animation: rotate 10s linear infinite;
}
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
}