/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    --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);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color) 0%, #7C3AED 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* 搜索区域 */
.search-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.search-input {
    flex: 1;
    padding: 14px 18px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all 0.2s ease;
    font-family: inherit;
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
}

.search-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, #7C3AED 100%);
    color: white;
}

.search-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.search-icon {
    width: 20px;
    height: 20px;
}

/* 搜索选项 */
.search-options {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.option-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.option-label select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    outline: none;
}

.option-label select:focus {
    border-color: var(--primary-color);
}

/* 加载状态 */
.loading-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading-text {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 500;
}

.loading-detail {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* 错误状态 */
.error-state {
    text-align: center;
    padding: 40px 20px;
    background: #FEF2F2;
    border-radius: var(--radius-xl);
    border: 1px solid #FECACA;
}

.error-icon {
    width: 48px;
    height: 48px;
    color: var(--error-color);
    margin-bottom: 16px;
}

.error-text {
    color: var(--error-color);
    font-size: 1rem;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-icon {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.empty-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 搜索结果区域 */
.results-section {
    animation: fadeIn 0.3s ease;
}

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

/* 搜索统计 */
.search-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    background: var(--bg-primary);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--text-primary);
    font-weight: 600;
}

.stat-value.highlight {
    color: var(--primary-color);
    font-size: 1.125rem;
}

.cache-badge {
    margin-left: auto;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}

/* AI总结 */
.ai-summary {
    background: linear-gradient(135deg, var(--primary-light) 0%, #F3E8FF 100%);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid rgba(79, 70, 229, 0.1);
}

.summary-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
}

.ai-icon {
    width: 20px;
    height: 20px;
}

.summary-text {
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* 关键词变体 */
.variants-section {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.variants-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.variants-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.variant-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.variant-priority {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50%;
}

/* 结果列表 */
.results-list {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.results-list h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* 结果卡片 */
.result-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.result-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.result-card:last-child {
    margin-bottom: 0;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.user-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.username {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.pub-date {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.device-tag {
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.card-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.card-message {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 10px;
    display: block;
    overflow: visible;
}

.card-message.expanded {
    display: block;
    -webkit-line-clamp: initial;
    -webkit-box-orient: initial;
    overflow: visible;
}

.card-message a {
    color: var(--primary-color);
    text-decoration: underline;
    text-underline-offset: 2px;
    word-break: break-all;
}

.card-message p {
    margin: 0 0 10px;
}

.card-message ul,
.card-message ol {
    margin: 0 0 12px 20px;
    padding: 0;
}

.card-message li {
    margin-bottom: 6px;
}

.card-message blockquote {
    margin: 0 0 12px;
    padding: 8px 12px;
    border-left: 3px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.card-message pre {
    margin: 0 0 12px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

.card-message code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: var(--bg-tertiary);
    border-radius: 4px;
    padding: 1px 4px;
    color: var(--text-primary);
}

.card-actions {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 12px;
}

.expand-btn {
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.expand-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.expand-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.card-images {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
}

.card-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tag {
    padding: 4px 10px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.stats {
    display: flex;
    gap: 20px;
}

.stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat svg {
    width: 18px;
    height: 18px;
}

.view-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.view-link:hover {
    color: var(--primary-hover);
}

.view-link svg {
    width: 16px;
    height: 16px;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-hint {
    margin-top: 4px;
    font-size: 0.8125rem;
}

/* 工具类 */
.hidden {
    display: none !important;
}

/* 响应式设计 */
@media (max-width: 640px) {
    .container {
        padding: 20px 16px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .search-box {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
        justify-content: center;
    }

    .search-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .search-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .cache-badge {
        margin-left: 0;
    }

    .card-footer {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .stats {
        width: 100%;
        justify-content: space-between;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}