:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --text-color: #333;
    --light-text: #666;
    --bg-color: #f5f5f5;
    --card-bg: rgba(255, 255, 255, 0.85);
    --border-radius: 16px;
    --blur-amount: 10px;
    --date-header-bg: rgba(66, 133, 244, 0.1);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    }
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    background-image: url('https://source.unsplash.com/random/1920x1080/?tech');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    min-height: 100vh;
}
.container {
    max-width: 900px;
    margin: 0 auto;
}
header {
    text-align: center;
    margin-bottom: 30px;
    backdrop-filter: blur(var(--blur-amount));
    background-color: rgba(255, 255, 255, 0.7);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    /* 移除position: sticky相关属性 */
}
.header-content111 {
    display: flex;
    justify-content: center;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 10px 20px;
}
h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0;
    /* 移除原来的下边距 */
}
.date {
    color: var(--light-text);
    font-size: 1rem;
    margin-bottom: 0;
    /* 确保没有额外边距 */
}
.header-description {
    color: var(--light-text);
    font-size: 1rem;
    margin-bottom: 0;
}
/* 以下保持原有样式不变 */
.daily-sections {
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.daily-section {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(var(--blur-amount));
}
.daily-header {
    background-color: var(--date-header-bg);
    padding: 12px 20px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    padding: 20px;
}
.article-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}
.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}
.article-card.read {
    opacity: 0.7;
}
.article-content {
    padding: 15px;
    position: relative;
}
.article-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 600;
}
.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--light-text);
}
.read-time {
    display: flex;
    align-items: center;
}
.read-time svg {
    margin-right: 5px;
}
.tag {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 0.75rem;
    margin-right: 5px;
    margin-bottom: 5px;
}
.empty-placeholder {
    text-align: center;
    padding: 30px;
    color: var(--light-text);
    grid-column: 1 / -1;
}
@media (max-width: 768px) {
    .articles-container {
        grid-template-columns: 1fr;
    }
    h1 {
        font-size: 2rem;
    }
}