/**
 * 电子报系统 - 主刊样式
 * 仅主刊使用
 * 版本: 2.0.0
 */

/* ============================================================
   1. 主刊颜色变量
   ============================================================ */
:root {
    --primary-color: #4fc3f7;
    --secondary-color: #1a2332;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --border-color: #dce1e8;
    --text-color: #1a2332;
    --text-muted: #6b7a8a;
}

/* ============================================================
   2. 主刊布局
   ============================================================ */
.main-content {
    display: grid;
    grid-template-columns: 1fr 320px 260px;
    gap: 20px;
    margin: 20px auto;
    max-width: 1200px;
    padding: 0 15px;
}

.left-panel,
.center-panel,
.right-panel {
    background: #fff;
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
}

/* ============================================================
   3. 主刊近期报刊 - 6列
   ============================================================ */
.recent-section {
    margin: 20px 0;
    padding: 20px 0;
    background: #fff;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 0 15px;
}
.section-header h2 {
    font-size: 18px;
    margin: 0;
}
.section-header .more-link {
    font-size: 14px;
    color: #4fc3f7;
}
.section-header .more-link:hover {
    text-decoration: underline;
}

.newspaper-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.newspaper-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}
.newspaper-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.newspaper-item a {
    display: block;
    text-decoration: none;
    color: inherit;
}
.newspaper-item .cover-wrapper {
    position: relative;
    padding-top: 140%;
    overflow: hidden;
    background: #f5f5f5;
}
.newspaper-item .cover-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.newspaper-item .info {
    padding: 10px 12px;
    text-align: center;
}
.newspaper-item .info h3 {
    font-size: 12px;
    margin: 0 0 4px;
    line-height: 1.3;
    color: #1a2332;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    min-height: 32px;
}
.newspaper-item .info .date {
    font-size: 11px;
    color: #999;
}
.newspaper-item .info .issue {
    font-size: 11px;
    color: #4fc3f7;
    display: inline-block;
    margin-left: 5px;
}

/* ============================================================
   4. 主刊响应式
   ============================================================ */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr 280px 220px;
        gap: 15px;
    }
    .newspaper-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .newspaper-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .newspaper-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .newspaper-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin: 0 auto;
    }
}