/* ==================== 全局样式重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #262626;
    background-color: #FFFFFF;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page.active {
    animation: fadeIn 0.3s ease;
}

@keyframes loading-dot {
    0%, 80%, 100% {
        opacity: 0.3;
    }
    40% {
        opacity: 1;
    }
}

/* ==================== 旧样式隐藏（保留兼容性） ==================== */
.page-header {
    display: none; /* 旧页头已隐藏，使用新的top-navbar */
}

.main-layout {
    display: none; /* 旧布局已隐藏，使用新的app-container */
}

.sidebar {
    display: none; /* 旧侧边栏已隐藏，使用新的导航栏 */
}

.content {
    display: none; /* 旧内容区域已隐藏，使用新的content-area */
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}