/* Page Title Area (BLOG) */
.page-header {
    text-align: center;
    padding: 20px 0;
    position: relative;
    height:120px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.page-header h1 {
    color: #ef4146;
    font-size:46px;
    z-index: 2;
    margin-top: 10px;
}

.watermark-bg {
    position: absolute;
    font-size: 60px;
    font-weight: 800;
    color: #e0e0e0;
    opacity: 0.5;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    white-space: nowrap;
}

/* 红色导航条 */
.red-nav {
    background-color: #ef4146;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 10%;
    font-size: 14px;
    margin-bottom: 20px;
    width: 85%;
    margin: 30px auto;
    gap: 20px;
}

.red-nav span {
    cursor: pointer;
}



/* 左侧文章区域 */
.main-content {
    flex: 2.5;
    background: white;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.article-title {
    text-align: center;
    color: #ef4146;
    font-size: 28px;
    margin-bottom: 5px;
    line-height: 1.3;
}

.meta-info {
    text-align: center;
    font-size: 12px;
    color: #666;
    margin-bottom: 40px;
}

.article-body {
    font-size: 13px;
    color: #444;
    margin-bottom: 30px;
}

.article-body p {
    margin-bottom: 5px;
    color: #444;
}

.conference-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    margin-top: 30px;
}

/* 右侧侧边栏 */
.sidebar {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.bg-f2{background-color: #f2f2f2;}
.sidebar-widget {
    background: white;
    padding: 30px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.widget-title {
    color: #ef4146;
    font-size: 22px;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.widget-watermark {
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 32px;
    font-weight: bold;
    color: #f2f2f2;
    z-index: 1;
    line-height: 1;
}

.contact-btn {
    background-color: #ef4146;
    color: white;
    border: none;
    padding: 10px 25px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    position: relative;
    z-index: 2;
}

.blog-list-item {
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.blog-list-item h4 {
    font-size: 13px;
    margin: 0 0 5px 0;
    font-weight: normal;
    line-height: 1.4;
}

.blog-date {
    font-size: 11px;
    color: #888;
}

/* 底部导航条 (灰色) */
.bottom-nav {
    width: 80%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    color: #666;
    font-size: 12px;
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: 20px;
}

.bottom-nav div {
    display: flex;
    flex-direction: column;
}

.bottom-nav .nav-label {
    font-weight: bold;
    font-size: 14px;
    color: #333;
    margin-bottom: 4px;
}

.bottom-nav .right {
    text-align: right;
}

/* 相关文章区域 */
.related-posts {
    width: 85%;
    margin: 0 auto 50px auto;
    background: white;
    padding: 30px 40px;
    position: relative;
    overflow: hidden;
}

.related-posts h2 {
    color: #ef4146;
    font-size: 24px;
    margin-bottom: 30px;
    position: relative;
    z-index: 2;
}

.related-grid {
    display: flex;
    gap: 40px;
    position: relative;
    z-index: 2;
}

.related-item {
    flex: 1;
}

.related-item h3 {
    font-size: 14px;
    font-weight: normal;
    margin-bottom: 5px;
}

.category-tag {
    color: #ef4146;
    font-size: 12px;
}

.contents-div{
    display: flex;
    width: 85%;
    margin: 30px auto;
    gap: 20px;
}