/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 20px; min-height: 80vh;}

.section-header {
    border-left: 5px solid #2c3e50;
    padding-left: 15px;
    margin: 30px 0 20px 0;
    display: flex;
    align-items: baseline;
}
.section-title { font-size: 1.5em; color: #2c3e50; font-weight: 600; margin-right: 10px; }
.section-subtitle { color: #7f8c8d; font-size: 0.9em; }

/* 推荐书籍 */
.rec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 50px;
}
.rec-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.rec-card:hover { transform: translateY(-5px); box-shadow: 0 8px 15px rgba(0,0,0,0.15); }

.rec-cover-wrapper {
    width: 100%;
    padding-top: 140%; /* 1:1.4 aspect ratio */
    position: relative;
    background: #eee;
    overflow: hidden;
}
.rec-cover { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
.rec-info { padding: 12px; flex-grow: 1; display: flex; flex-direction: column; }
.rec-title { font-weight: bold; font-size: 1.1em; margin-bottom: 5px; color: #333; }
.rec-author { font-size: 0.9em; color: #7f8c8d; }

/* 全部书籍 */
.list-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    overflow: hidden;
}
.list-header, .list-row {
    display: grid;
    grid-template-columns: 3fr 2fr 2fr 1fr 1fr;
    padding: 15px 20px;
    align-items: center;
}
.list-header { background: #f8f9fa; font-weight: bold; color: #666; border-bottom: 1px solid #eee; font-size: 0.9em; }
.list-row { border-bottom: 1px solid #f0f0f0; transition: background 0.2s; color: #555; font-size: 0.95em; }
.list-row:last-child { border-bottom: none; }
.list-row:hover { background: #fdfdfd; }
.list-title { color: #2c3e50; font-weight: 500; }
.list-row:hover .list-title { color: #2980b9; }

/* 分页控件 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 10px;
}
.page-link {
    padding: 8px 16px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    color: #2c3e50;
    font-size: 0.9em;
    transition: 0.2s;
}
.page-link:hover { background: #eee; }
.page-current {
    padding: 8px 16px;
    background: #2c3e50;
    color: white;
    border: 1px solid #2c3e50;
    border-radius: 4px;
    font-weight: bold;
}
.page-disabled {
    padding: 8px 16px;
    color: #aaa;
    border: 1px solid #eee;
    border-radius: 4px;
    cursor: not-allowed;
}

@media (max-width: 900px) {
    .rec-grid { grid-template-columns: repeat(2, 1fr); }
    .list-header, .list-row { grid-template-columns: 2fr 1.5fr 1.5fr; } 
    .list-cell-hide-mobile { display: none; }
}
@media (max-width: 600px) {
    .rec-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .list-header { display: none; }
    .list-row { display: flex; flex-direction: column; align-items: flex-start; gap: 5px; padding: 15px; }
}