/* 自定义主题颜色 */
:root {
    --theme-color: #3498db;
    --theme-color-dark: #2980b9;
    --text-color: #2c3e50;
    --text-color-secondary: #7f8c8d;
    --bg-color: #ffffff;
    --bg-color-secondary: #f8f9fa;
}

/* 自定义字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-color);
}

/* 导航栏样式 */
.navbar-custom {
    background-color: var(--bg-color);
    border-bottom: 1px solid rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.navbar-custom .nav li a {
    color: var(--text-color);
    transition: all 0.3s ease;
}

.navbar-custom .nav li a:hover {
    color: var(--theme-color);
    transform: translateY(-2px);
}

/* 文章卡片动画效果 */
.post-preview {
    transition: all 0.3s ease;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.post-preview:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    background-color: var(--bg-color);
}

/* 标题动画效果 */
.post-title {
    position: relative;
    display: inline-block;
}

.post-title:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--theme-color);
    transition: width 0.3s ease;
}

.post-preview:hover .post-title:after {
    width: 100%;
}

/* 标签云动画 */
.tags a {
    background-color: var(--bg-color-secondary);
    color: var(--text-color-secondary);
    padding: 5px 10px;
    border-radius: 15px;
    transition: all 0.3s ease;
    margin: 2px;
    display: inline-block;
}

.tags a:hover {
    background-color: var(--theme-color);
    color: white;
    transform: scale(1.1);
}

/* 按钮样式 */
.btn-default {
    background-color: var(--theme-color);
    border-color: var(--theme-color);
    color: white;
    transition: all 0.3s ease;
}

.btn-default:hover {
    background-color: var(--theme-color-dark);
    border-color: var(--theme-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 页面加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-container {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--theme-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--theme-color-dark);
}