/* ==================== CSS变量 ==================== */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-ssln: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);
}

/* ==================== 基础样式 ==================== */
body {
    background-color: var(--background-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 1.375rem;
}

/* ==================== 页面标题 ==================== */
.ssln-header {
    background: var(--gradient-ssln);
    color: white;
    padding: 2.5rem 0 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.ssln-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ssln-divider {
    width: 80px;
    height: 3px;
    background: rgba(255, 255, 255, 0.8);
    margin: 0.75rem auto 0;
    border-radius: 2px;
}

/* ==================== 容器 ==================== */
.ssln-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ==================== 卡片组件 ==================== */
.ssln-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card-header {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 1.75rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 2.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-title i {
    color: var(--primary-color);
    font-size: 2rem;
    flex-shrink: 0;
}

.card-title .title-text {
    flex: 1;
}

.card-title::before {
    content: '';
    width: 4px;
    height: 28px;
    background: var(--primary-color);
    border-radius: 2px;
    flex-shrink: 0;
}

.card-body {
    padding: 1.75rem;
}

.text-center {
    text-align: center;
}

/* ==================== 导航 ==================== */
.ssln-nav {
    margin-bottom: 2rem;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 1.25rem;
    font-weight: 500;
    transition: var(--transition);
}

.back-btn:hover {
    background: #475569;
    color: white;
    text-decoration: none;
    transform: translateY(-1px);
}

/* ==================== 杂志计数 ==================== */
.magazine-count {
    font-size: 1.5rem;
    font-weight: normal;
    color: var(--text-secondary);
    background: rgba(37, 99, 235, 0.1);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    margin-left: auto;
    flex-shrink: 0;
}

/* ==================== 杂志网格 ==================== */
.magazines-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: flex-start;
}

.magazine-item {
    width: 250px;
    background: var(--card-background);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.magazine-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.magazine-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.magazine-link:hover {
    text-decoration: none;
    color: inherit;
}

.magazine-cover {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: #f8fafc;
}

.magazine-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.magazine-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: white;
    opacity: 0;
    transition: var(--transition);
}

.magazine-item:hover .magazine-overlay {
    opacity: 1;
}

.magazine-overlay i {
    font-size: 2rem;
}

.magazine-overlay span {
    font-size: 1.25rem;
    font-weight: 600;
}

.magazine-info {
    padding: 1.25rem;
    text-align: center;
}

.magazine-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.magazine-id {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==================== PDF阅读器 ==================== */
.pdf-notice {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: #dbeafe;
    border: 1px solid #93c5fd;
    border-radius: var(--border-radius-sm);
    color: #1e40af;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.pdf-notice i {
    font-size: 1.375rem;
    flex-shrink: 0;
}

.pdf-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.pdf-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.pdf-container {
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    border: 2px solid var(--border-color);
    background: #f8fafc;
}

.pdf-embed {
    display: block;
    border: none;
    background: white;
}

/* ==================== 空状态 ==================== */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: block;
}

.empty-state h3 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1rem 0;
}

.empty-state p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin: 1rem 0 2rem 0;
}

.error-details {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    color: #dc2626;
    font-size: 1.125rem;
    margin-top: 1rem;
}

/* ==================== 联系信息 ==================== */
.contact-info {
    padding: 1.5rem;
}

.contact-info i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-info h3 {
    font-size: 1.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1rem 0 0.5rem 0;
}

.email-link {
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--border-radius-sm);
    display: inline-block;
    transition: var(--transition);
}

.email-link:hover {
    color: var(--primary-hover);
    background: rgba(37, 99, 235, 0.15);
    text-decoration: none;
    transform: translateY(-1px);
}

/* ==================== 调试信息 ==================== */
.debug-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.debug-item {
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius-sm);
    border: 1px solid #ffeaa7;
}

.debug-item.error {
    background: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

.debug-item strong {
    color: #856404;
    margin-right: 0.5rem;
}

.debug-item.error strong {
    color: #dc2626;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .ssln-title {
        font-size: 2.75rem;
    }
    
    .ssln-header {
        padding: 2rem 0 1rem;
    }
    
    .ssln-container {
        padding: 0 0.75rem;
    }
    
    .card-body {
        padding: 1.25rem;
    }
    
    .card-header {
        padding: 1.25rem;
    }
    
    .card-title {
        font-size: 1.875rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .card-title::before {
        display: none;
    }
    
    .magazine-count {
        font-size: 1.25rem;
        margin-left: 0;
        margin-top: 0.5rem;
    }
    
    .magazines-grid {
        justify-content: center;
        gap: 1rem;
    }
    
    .magazine-item {
        width: 220px;
    }
    
    .magazine-cover {
        height: 260px;
    }
    
    .pdf-container {
        margin: 0 -1.25rem;
        border-radius: 0;
    }
    
    .pdf-embed {
        height: 600px;
    }
    
    .debug-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .ssln-title {
        font-size: 2.25rem;
    }
    
    .magazines-grid {
        flex-direction: column;
        align-items: center;
    }
    
    .magazine-item {
        width: 100%;
        max-width: 280px;
    }
    
    .back-btn {
        font-size: 1.125rem;
        padding: 0.75rem 1.25rem;
    }
    
    .pdf-embed {
        height: 500px;
    }
}

/* ==================== 清除浮动 ==================== */
.clear {
    clear: both;
}

/* ==================== 打印样式 ==================== */
@media print {
    .ssln-header,
    .ssln-nav,
    .contact-card,
    .debug-card {
        display: none;
    }
    
    .ssln-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }
    
    .magazine-item {
        break-inside: avoid;
    }
}