.article-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 40px 20px;
    display: flex;
    gap: 30px;
}

.main-content {
    flex: 1;
    min-width: 0;
}

.sidebar {
    width: 280px;
    position: sticky;
    top: var(--header-height);
    height: fit-content;
    background: #ffffff;
    border-radius: 15px;
    padding: 25px;
    border: 1px solid #e9ecef;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    margin-bottom: 0.75rem;
}

.article-header {
    border-bottom: 1px solid #e9ecef;
    padding: 30px;
    margin-bottom: 40px;
    background-color: #ffffff;
}

.article-title {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.3;
    font-weight: 400;
}

.article-badge {
    background-color: #ffc107;
    color: #000;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-left: 15px;
    font-weight: 600;
}

.action-buttons {
    margin-top: 25px;
}

.btn-online-read {
    background: linear-gradient(135deg, #007bff, #0056b3);
    border: none;
    color: white;
    padding: 12px 25px;
    border-radius: 25px;
    margin-right: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-online-read:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,123,255,0.3);
    color: white;
}

.btn-download {
    background: linear-gradient(135deg, #28a745, #1e7e34);
    border: none;
    color: white;
    padding: 12px 25px;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40,167,69,0.3);
    color: white;
}

.article-meta {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 30px;
    border-radius: 15px;
    margin: 40px 0;
    border: 1px solid #dee2e6;
}

.meta-row {
    display: flex;
    margin-bottom: 15px;
    align-items: flex-start;
}

.meta-label {
    font-weight: 600;
    color: #555;
    min-width: 120px;
    margin-right: 20px;
}

.meta-value {
    color: #333;
    flex: 1;
    line-height: 1.5;
}

.publisher-highlight {
    background-color: #fff3cd;
    padding: 8px 16px;
    border-radius: 20px;
    display: inline-block;
    font-weight: 500;
}

.social-share {
    margin: 25px 0;
}

.share-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: none;
    margin-right: 12px;
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.share-wechat {
    background: linear-gradient(135deg, #1aad19, #0d8912);
}

.share-weibo {
    background: linear-gradient(135deg, #e6162d, #c41e3a);
}

.share-more {
    background: linear-gradient(135deg, #666, #555);
}

.sidebar-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
    text-align: center;
}

.sidebar-info {
    margin-bottom: 20px;
}

.sidebar-info-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.9rem;
}

.sidebar-info-item:last-child {
    border-bottom: none;
}

.sidebar-info-label {
    color: #666;
    font-weight: 500;
}

.sidebar-info-value {
    color: #333;
    font-weight: 600;
}

.issue-cover {
}

.cover-image-wrap {
    position: relative;
    padding-top: 135.71%;
    object-fit: cover;
    border-radius: 10px;
    transition: all 0.3s ease;
    background-color: #f8f9fa;
}

.cover-image {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.alert {
    border-radius: 12px;
    border: 1px solid #dee2e6;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    border-color: #b6d4da;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-color: #ffeaa7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .article-container {
        flex-direction: column;
        gap: 20px;
    }

    .sidebar {
        width: 100%;
        position: static;
    }
}