/**
 * 商标查询系统样式表 - 优化版本
 * 现代化UI设计，支持响应式布局
 */

/* CSS变量定义 */
:root {
    --primary-color: #1976d2;
    --primary-hover: #1565c0;
    --primary-light: #e3f2fd;
    --secondary-color: #5c6bc0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-muted: #9e9e9e;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-tertiary: #e8eaf6;
    --border-color: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.1), 0 6px 6px rgba(0,0,0,0.06);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
}

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* 主容器 */
.main-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px 40px;
    flex: 1 0 auto;
    position: relative;
    z-index: 1;
}

/* 居中盒子 - 首页布局 */
.center-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 65vh;
    margin-bottom: 32px;
    transition: all var(--transition-normal);
}

/* 标题样式 */
h1 {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin: 36px 0 28px;
    letter-spacing: 0.02em;
    color: var(--text-primary);
}

h1 a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
    border-radius: var(--radius-sm);
    padding: 4px 12px;
}

h1 a:hover {
    color: var(--primary-color);
}

/* 搜索栏 */
.search-bar {
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto 24px;
    position: relative;
}

.search-bar input {
    flex: 1;
    font-size: 1.1rem;
    padding: 16px 24px;
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    border: 2px solid var(--primary-color);
    border-right: none;
    outline: none;
    background: var(--bg-primary);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.search-bar input:focus {
    box-shadow: 0 0 0 4px rgba(25, 118, 210, 0.15);
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.search-bar button {
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
    border: 2px solid var(--primary-color);
    padding: 16px 32px;
    background: var(--primary-color);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.search-bar button:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.search-bar button:active {
    transform: translateY(0);
}

/* 搜索建议下拉 */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    max-height: 300px;
    overflow-y: auto;
    display: none;
}

.search-suggestions.active {
    display: block;
}

.suggestion-item {
    padding: 12px 24px;
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

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

.suggestion-item:hover,
.suggestion-item.selected {
    background: var(--primary-light);
}

.suggestion-item .highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* 视图切换 */
.view-toggle {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-bottom: 16px;
    align-items: center;
}

.view-toggle-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-right: 8px;
}

.toggle-btn {
    border: 1px solid var(--primary-color);
    background: var(--bg-primary);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    padding: 8px 20px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.toggle-btn:hover {
    background: var(--primary-light);
}

.toggle-btn.active {
    background: var(--primary-color);
    color: #fff;
}

/* 统计面板 */
.stats-panel {
    background: linear-gradient(135deg, var(--primary-light) 0%, #fff 100%);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    margin-bottom: 20px;
    border: 1px solid rgba(25, 118, 210, 0.1);
    box-shadow: var(--shadow-sm);
}

.stats-panel .stats-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.stats-panel .stats-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.stats-panel .stats-value {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
}

.stats-panel .stats-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

/* 分类标签 */
.cat-tag {
    display: inline-flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    padding: 4px 12px;
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cat-tag:hover,
.cat-tag.active {
    background: var(--primary-color);
    color: #fff;
}

.cat-tag .count {
    background: rgba(25, 118, 210, 0.15);
    border-radius: 10px;
    padding: 2px 8px;
    margin-left: 6px;
    font-size: 0.75rem;
}

.cat-tag:hover .count,
.cat-tag.active .count {
    background: rgba(255, 255, 255, 0.25);
}

/* 卡片列表 */
.card-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 20px;
}

/* 商标卡片 */
.trademark-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.trademark-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: rgba(25, 118, 210, 0.2);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.cat-badge {
    display: inline-flex;
    align-items: center;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    padding: 4px 12px;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.code {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-family: 'SF Mono', Monaco, monospace;
    background: var(--bg-secondary);
    padding: 2px 8px;
    border-radius: 4px;
}

.title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.excerpt {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
    flex: 1;
}

.detail-btn {
    align-self: flex-end;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.detail-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 表格样式 */
.tradetable {
    border-collapse: collapse;
    width: 100%;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.tradetable th,
.tradetable td {
    border: 1px solid var(--border-color);
    padding: 14px 16px;
    font-size: 0.95rem;
    text-align: left;
}

.tradetable th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.tradetable tr:nth-child(even) {
    background: var(--bg-secondary);
}

.tradetable tr:hover {
    background: var(--primary-light);
}

.tradetable td.marked {
    background: #fffbe8;
}

/* 高亮样式 */
mark, .highlight {
    background: #ffe066;
    color: var(--text-primary);
    border-radius: 2px;
    padding: 1px 3px;
    font-weight: 600;
}

/* 小类卡片 */
.subclass-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    padding: 16px 20px;
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.8;
    border-left: 4px solid var(--primary-color);
}

.subclass-card b {
    color: var(--primary-color);
}

/* 模态框 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 32px;
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 12px 0;
    color: var(--text-primary);
    padding-right: 40px;
}

.modal-content .cat-badge {
    margin-bottom: 16px;
}

.detail-body {
    margin-top: 8px;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.05rem;
    line-height: 1.9;
    word-break: break-word;
}

.close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 8px 16px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--error-color);
    color: #fff;
}

/* 相关项目 */
.related-section {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.related-section h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.related-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.related-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.related-item:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    padding: 20px 0;
}

.pagination-btn {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0 12px;
}

/* 加载状态 */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* 错误状态 */
.error-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--error-color);
}

/* 页脚 */
.footer-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: auto;
    padding-top: 40px;
}

.footer {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.95rem;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    box-shadow: var(--shadow-sm);
}

.footer .footer-icon {
    font-size: 1.2rem;
    margin-right: 8px;
    opacity: 0.8;
}

.footer .footer-link {
    color: var(--primary-color);
    text-decoration: none;
    margin-left: 4px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 999;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-container {
        padding: 0 12px 32px;
    }
    
    h1 {
        font-size: 1.6rem;
        margin: 24px 0 20px;
    }
    
    .center-box {
        min-height: 50vh;
    }
    
    .search-bar {
        flex-direction: column;
        gap: 12px;
    }
    
    .search-bar input {
        border-radius: var(--radius-xl);
        border-right: 2px solid var(--primary-color);
    }
    
    .search-bar button {
        border-radius: var(--radius-xl);
        width: 100%;
    }
    
    .card-list {
        grid-template-columns: 1fr;
    }
    
    .view-toggle {
        justify-content: center;
    }
    
    .tradetable {
        font-size: 0.85rem;
    }
    
    .tradetable th,
    .tradetable td {
        padding: 10px 12px;
    }
    
    .modal-content {
        padding: 24px 20px;
        margin: 16px;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .footer {
        padding: 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.3rem;
    }
    
    .trademark-card {
        padding: 16px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}

/* 打印样式 */
@media print {
    .search-bar,
    .view-toggle,
    .detail-btn,
    .back-to-top,
    .footer-wrap {
        display: none !important;
    }
    
    .trademark-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}