/* ===== 现代化UI设计系统 ===== */

/* 设计令牌 */
:root {
    /* 颜色系统 */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 间距系统 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* 圆角系统 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 字体系统 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    
    /* 过渡动画 */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== 现代化Meta区域 ===== */
.modern-meta-container {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    margin: var(--space-6) 0;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.modern-meta-container:hover {
    border-color: #bfdbfe;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.modern-meta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    justify-content: flex-start;
}

.modern-meta-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--primary-50);
    color: var(--primary-600);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.modern-meta-tag:hover {
    background: var(--primary-100);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.modern-meta-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--gray-600);
}

.modern-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border: none;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: none;
}

.modern-meta-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* 作者图标样式 */
.modern-meta-item.user-profile-trigger {
    background-color: #f5f3ff !important;
    color: #8b5cf6 !important;
}

.modern-meta-item.user-profile-trigger:hover {
    background-color: #ede9fe !important;
}

/* 日期图标样式 */
.modern-meta-item:nth-child(2) {
    background-color: #ecfdf5 !important;
    color: #10b981 !important;
}

.modern-meta-item:nth-child(2):hover {
    background-color: #d1fae5 !important;
}

/* 浏览量图标样式 */
.modern-meta-item:nth-child(3) {
    background-color: #fef2f2 !important;
    color: #ef4444 !important;
}

.modern-meta-item:nth-child(3):hover {
    background-color: #fee2e2 !important;
}

/* 字数统计图标样式 */
.modern-meta-item:nth-child(4) {
    background-color: #f3f4f6 !important;
    color: #6b7280 !important;
}

.modern-meta-item:nth-child(4):hover {
    background-color: #e5e7eb !important;
}

/* 评论图标样式 */
.modern-meta-item.comment-toggle {
    background-color: #f0fdf4 !important;
    color: #22c55e !important;
}

.modern-meta-item.comment-toggle:hover {
    background-color: #dcfce7 !important;
}

/* 反馈按钮图标样式 */
.modern-meta-item.feedback-toggle {
    background-color: #fef3c7 !important;
    color: #f59e0b !important;
}

.modern-meta-item.feedback-toggle:hover {
    background-color: #fde68a !important;
}

/* 简化图标样式 */
.modern-meta-item i {
    font-size: 12px !important;
    color: inherit !important;
    opacity: 1 !important;
    background: none !important;
    box-shadow: none !important;
    width: auto !important;
    height: auto !important;
    padding: 0 !important;
    border-radius: 0 !important;
}

.modern-meta-item i:hover {
    transform: none !important;
    background: none !important;
    box-shadow: none !important;
}

.modern-meta-item.active {
    background-color: #eff6ff !important;
    color: #3b82f6 !important;
    border: none !important;
}

.modern-meta-item.active i {
    color: #3b82f6 !important;
    opacity: 1 !important;
}

/* ===== 现代化来源信息 ===== */
.modern-source-info {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin: var(--space-6) 0 var(--space-4);
    padding: var(--space-3) 0;
    border-top: 1px solid var(--gray-200);
    font-size: var(--text-sm);
    color: var(--gray-500);
}

.modern-source-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--primary-600);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modern-source-link:hover {
    background: var(--primary-50);
    color: var(--primary-700);
}

.modern-source-link i {
    font-size: var(--text-xs);
    opacity: 0.7;
}

/* ===== 现代化互动按钮 ===== */
.modern-action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin: var(--space-8) 0;
    padding: 0;
    border-radius: var(--radius-2xl);
}

.modern-action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: none;
    border-radius: 50px;
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 100px;
    justify-content: center;
}

/* 点赞按钮样式 */
.modern-action-btn.like {
    background-color: #fff0f0 !important;
    color: #ff4d4f !important;
}

.modern-action-btn.like i {
    background-color: #ff4d4f !important;
    color: white !important;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-right: 4px;
}

.modern-action-btn.like:hover,
.modern-action-btn.like.active {
    background-color: #fff0f0 !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(255, 77, 79, 0.2);
}

/* 收藏按钮样式 */
.modern-action-btn.favorite {
    background-color: #fff7e6 !important;
    color: #fa8c16 !important;
}

.modern-action-btn.favorite i {
    background-color: #fa8c16 !important;
    color: white !important;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-right: 4px;
}

.modern-action-btn.favorite:hover,
.modern-action-btn.favorite.active {
    background-color: #fff7e6 !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(250, 140, 22, 0.2);
}

/* 分享按钮样式 */
.modern-action-btn.share {
    background-color: #e6f7ff !important;
    color: #1890ff !important;
}

.modern-action-btn.share i {
    background-color: #1890ff !important;
    color: white !important;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-right: 4px;
}

.modern-action-btn.share:hover {
    background-color: #e6f7ff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(24, 144, 255, 0.2);
}

/* 按钮图标样式 */
.modern-action-btn i {
    font-size: var(--text-sm);
    color: inherit !important;
}

.modern-action-btn:hover i {
    color: inherit !important;
}

/* 点赞按钮图标悬停效果 */
.modern-action-btn.like:hover i {
    background-color: #ff4d4f !important;
    color: white !important;
    box-shadow: 0 2px 4px rgba(255, 77, 79, 0.4);
    transform: scale(1.1);
}

/* 收藏按钮图标悬停效果 */
.modern-action-btn.favorite:hover i {
    background-color: #fa8c16 !important;
    color: white !important;
    box-shadow: 0 2px 4px rgba(250, 140, 22, 0.4);
    transform: scale(1.1);
}

/* 分享按钮图标悬停效果 */
.modern-action-btn.share:hover i {
    background-color: #1890ff !important;
    color: white !important;
    box-shadow: 0 2px 4px rgba(24, 144, 255, 0.4);
    transform: scale(1.1);
}

/* 按钮计数样式 */
.modern-action-count {
    font-size: var(--text-xs);
    font-weight: 600;
    opacity: 0.8;
    background: none !important;
    color: inherit !important;
    padding: 0 0 0 4px !important;
    border-radius: 0 !important;
    min-width: auto !important;
    text-align: inherit !important;
}

/* ===== 现代化时效性提示 ===== */
.modern-timeliness-alert {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    margin: 16px 0;
    border-radius: 24px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
    border: 1px solid transparent;
}

.modern-timeliness-alert:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.modern-timeliness-alert.fresh {
    background: #ffffff;
    border-color: #dcfce7;
    color: #166534;
}

.modern-timeliness-alert.good {
    background: #ffffff;
    border-color: #dbeafe;
    color: #1e40af;
}

.modern-timeliness-alert.old {
    background: #ffffff;
    border-color: #fef3c7;
    color: #92400e;
}

.modern-timeliness-alert.obsolete {
    background: #ffffff;
    border-color: #fee2e2;
    color: #dc2626;
}

.modern-timeliness-alert i {
    font-size: 14px;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modern-timeliness-alert.fresh i {
    background: #dcfce7;
    color: #22c55e;
}

.modern-timeliness-alert.good i {
    background: #dbeafe;
    color: #3b82f6;
}

.modern-timeliness-alert.old i {
    background: #fef3c7;
    color: #f59e0b;
}

.modern-timeliness-alert.obsolete i {
    background: #fee2e2;
    color: #ef4444;
}

.modern-timeliness-alert:hover i {
    transform: scale(1.1);
}

/* ===== 现代化加载状态 ===== */
.modern-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--gray-500);
}

.modern-loading-spinner {
    width: 2rem;
    height: 2rem;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-500);
    border-radius: 50%;
    animation: modern-spin 1s linear infinite;
    margin-bottom: var(--space-3);
}

@keyframes modern-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.modern-loading-text {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .modern-meta-container {
        padding: var(--space-3);
        margin: var(--space-3) 0;
    }
    
    /* 分类标签 */
    .modern-meta-tags {
        margin-bottom: var(--space-2);
    }
    
    .modern-meta-tag {
        font-size: 12px;
        padding: 4px 10px;
    }
    
    /* Meta信息横向紧凑排列 */
    .modern-meta-info {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
        justify-content: flex-start;
    }
    
    .modern-meta-item {
        padding: 4px 8px;
        font-size: 12px;
        gap: 4px;
    }
    
    .modern-meta-item i {
        font-size: 12px;
    }
    
    /* 隐藏部分文字，只显示图标和数字 */
    .modern-meta-item time {
        font-size: 11px;
    }
    
    /* 操作按钮 */
    .modern-action-buttons {
        flex-direction: row;
        flex-wrap: nowrap;
        gap: 8px;
        justify-content: center;
        margin: 16px 0;
        padding: 16px 0;
    }
    
    .modern-action-btn {
        flex: 1;
        min-width: 0;
        justify-content: center;
        padding: 6px 10px;
        font-size: 12px;
        gap: 4px;
        white-space: nowrap;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    }

    .modern-action-btn i {
        width: 22px !important;
        height: 22px !important;
        font-size: 10px !important;
        padding: 4px !important;
        margin-right: 2px !important;
        box-shadow: none !important;
    }

    .modern-action-btn .action-text {
        font-size: 11px;
    }

    .modern-action-btn .modern-action-count,
    .modern-action-btn .action-count {
        font-size: 10px;
    }
    
    .modern-source-info {
        justify-content: center;
        text-align: center;
    }
}

/* 更小屏幕进一步优化 */
@media (max-width: 480px) {
    .modern-meta-container {
        padding: 12px;
    }
    
    .modern-meta-info {
        gap: 5px;
    }
    
    .modern-meta-item {
        padding: 3px 6px;
        font-size: 11px;
    }
    
    .modern-meta-item i {
        font-size: 11px;
    }
    
    /* 日期只显示短格式 */
    .modern-meta-item time {
        font-size: 10px;
    }
    
    .modern-action-btn {
        padding: 5px 8px;
        font-size: 11px;
    }

    .modern-action-btn i {
        width: 20px !important;
        height: 20px !important;
        font-size: 9px !important;
        padding: 3px !important;
    }
}

/* ===== 夜间模式 ===== */
body.dark-mode {
    --gray-50: #0f172a;
    --gray-100: #1e293b;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #64748b;
    --gray-500: #94a3b8;
    --gray-600: #cbd5e1;
    --gray-700: #e2e8f0;
    --gray-800: #f1f5f9;
    --gray-900: #f8fafc;
}

body.dark-mode .modern-meta-container {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

body.dark-mode .modern-meta-item {
    background: var(--gray-200);
    border-color: var(--gray-300);
    color: var(--gray-700);
}

body.dark-mode .modern-meta-item.feedback-toggle {
    background: #4f46e5 !important;
    color: #ede9fe !important;
}

body.dark-mode .modern-meta-item.feedback-toggle:hover {
    background: #4338ca !important;
}

body.dark-mode .modern-action-btn {
    background: var(--gray-200);
    border-color: var(--gray-300);
    color: var(--gray-700);
}

/* ===== 微交互动画 ===== */
.modern-fade-in {
    animation: modern-fade-in 0.5s ease-out;
}

@keyframes modern-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modern-scale-in {
    animation: modern-scale-in 0.3s ease-out;
}

@keyframes modern-scale-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== 焦点状态 ===== */
.modern-meta-item:focus,
.modern-action-btn:focus,
.modern-source-link:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* ===== 无障碍优化 ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}