/**
 * 博客文章内容富文本样式
 * 风格：匹配主题紫色系 (#6366f1)
 */

/* ========================================
   1. 基础容器
   ======================================== */
.panel-body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: #374151;
    -webkit-font-smoothing: antialiased;
}

/* ========================================
   2. 文章标题 (在 panel 层)
   ======================================== */
h1.h2 {
    font-size: 3em;
    font-weight: 500;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: #111827;
    margin: 0 0 1.5rem 0;
    padding-bottom: 2rem;
    border-bottom: 2px solid #e5e7eb;
}

/* ========================================
   3. 内容标题 - 紫色渐变背景
   ======================================== */
.panel-body h2 {
    font-size: 2em;
    font-weight: 500;
    line-height: 1.4;
    margin: 2em 0 0.75em 0;
    padding: 0.5em 0.75em;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-left: 4px solid #6366f1;
    border-radius: 0 8px 8px 0;
    color: #1f2937;
}

.panel-body h3 {
    font-size: 1.25em;
    font-weight: 500;
    line-height: 1.5;
    margin: 1.75em 0 0.6em 0;
    padding: 0.4em 0.75em;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-left: 4px solid #3b82f6;
    border-radius: 0 6px 6px 0;
    color: #1f2937;
}

.panel-body h4 {
    font-size: 1.1em;
    font-weight: 500;
    color: #374151;
    margin: 1.5em 0 0.5em 0;
    padding-bottom: 0.25em;
    border-bottom: 2px solid #e5e7eb;
}

.panel-body h5,
.panel-body h6 {
    font-size: 1em;
    font-weight: 500;
    color: #6b7280;
    margin: 1.25em 0 0.5em 0;
}

/* ========================================
   4. 段落
   ======================================== */
.panel-body p {
    margin: 0 0 1.25em 0;
}

/* ========================================
   5. 文本格式
   ======================================== */
.panel-body strong,
.panel-body b {
    font-weight: 600;
    color: #1f2937;
}

.panel-body em,
.panel-body i {
    font-style: italic;
    color: #4b5563;
}

.panel-body del,
.panel-body s {
    text-decoration: line-through;
    color: #9ca3af;
}

.panel-body u {
    text-decoration: underline;
    text-decoration-color: #9ca3af;
    text-underline-offset: 2px;
}

/* ========================================
   6. 链接 - 紫色主题
   ======================================== */
.panel-body a {
    color: #6366f1;
    text-decoration: underline;
    text-decoration-color: #a5b4fc;
    text-underline-offset: 3px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.panel-body a:hover {
    color: #4f46e5;
    text-decoration-color: #6366f1;
}

/* ========================================
   7. 无序列表 - 紫色圆点
   ======================================== */
.panel-body ul {
    margin: 0 0 1.25em 0;
    padding-left: 1.5em;
    list-style: none;
}

.panel-body ul li {
    position: relative;
    margin-bottom: 0.5em;
    padding-left: 0.25em;
    line-height: 1.7;
}

.panel-body ul li::before {
    content: '';
    position: absolute;
    left: -1.1em;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 50%;
}

.panel-body ul ul,
.panel-body ul ol {
    margin: 0.5em 0;
}

.panel-body ul ul li::before {
    background: linear-gradient(135deg, #a5b4fc, #c4b5fd);
    width: 5px;
    height: 5px;
}

.panel-body ul ul ul li::before {
    background: transparent;
    border: 2px solid #a5b4fc;
}

/* ========================================
   8. 有序列表 - 紫色数字
   ======================================== */
.panel-body ol {
    margin: 0 0 1.25em 0;
    padding-left: 1.75em;
    counter-reset: list-counter;
    list-style: none;
}

.panel-body ol li {
    position: relative;
    margin-bottom: 0.5em;
    padding-left: 0.5em;
    line-height: 1.7;
    counter-increment: list-counter;
}

.panel-body ol li::before {
    content: counter(list-counter);
    position: absolute;
    left: -1.75em;
    top: 0.1em;
    width: 1.4em;
    height: 1.4em;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 50%;
    font-size: 0.75em;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.panel-body ol ol,
.panel-body ol ul {
    margin: 0.5em 0;
}

/* ========================================
   9. 内联代码 - 紫色主题
   ======================================== */
.panel-body code {
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    font-size: 0.875em;
    background: #f3f4f6;
    color: #7c3aed;
    padding: 0.2em 0.45em;
    border-radius: 4px;
    border: 1px solid #e5e7eb;
    white-space: nowrap;
}

/* ========================================
   10. 代码块 - 深色主题
   ======================================== */
.panel-body pre {
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    font-size: 0.875em;
    background: #1f2937;
    color: #e5e7eb;
    padding: 1.25em;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0 0 1.5em 0;
    line-height: 1.65;
    tab-size: 4;
}

.panel-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: 1em;
    border: none;
    border-radius: 0;
    white-space: pre;
}

/* ========================================
   11. 键盘按键
   ======================================== */
.panel-body kbd {
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    font-size: 0.8em;
    background: linear-gradient(to bottom, #ffffff, #f3f4f6);
    border: 1px solid #d1d5db;
    border-bottom-width: 2px;
    border-radius: 4px;
    padding: 0.2em 0.5em;
    color: #374151;
}

/* ========================================
   12. 徽章 - 紫色系
   ======================================== */
.panel-body .badge {
    display: inline-block;
    font-size: 0.75em;
    font-weight: 500;
    padding: 0.25em 0.7em;
    border-radius: 9999px;
    vertical-align: middle;
    line-height: 1.4;
}

.panel-body .badge-primary { background: #f5f3ff; color: #6366f1; }
.panel-body .badge-success { background: #f0fdf4; color: #16a34a; }
.panel-body .badge-warning { background: #fffbeb; color: #ca8a04; }
.panel-body .badge-error { background: #fef2f2; color: #dc2626; }
.panel-body .badge-info { background: #eff6ff; color: #3b82f6; }

/* ========================================
   13. 引用块 - 紫色渐变
   ======================================== */
.panel-body blockquote {
    margin: 0 0 1.5em 0;
    padding: 1em 1.25em;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-left: 4px solid #6366f1;
    border-radius: 0 8px 8px 0;
    color: #4b5563;
    font-style: italic;
}

.panel-body blockquote p:last-child {
    margin-bottom: 0;
}

.panel-body blockquote cite {
    display: block;
    margin-top: 0.75em;
    font-size: 0.875em;
    font-style: normal;
    color: #6b7280;
}

/* ========================================
   14. 表格 - 紫色表头
   ======================================== */
.panel-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1.5em 0;
    font-size: 0.9em;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.panel-body thead {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
}

.panel-body th {
    font-weight: 600;
    text-align: left;
    padding: 0.875em 1em;
    color: #ffffff;
    letter-spacing: 0.02em;
}

.panel-body td {
    padding: 0.75em 1em;
    border-bottom: 1px solid #e5e7eb;
}

.panel-body tbody tr:nth-child(even) {
    background-color: #f9fafb;
}

.panel-body tbody tr:last-child td {
    border-bottom: none;
}

.panel-body tbody tr:hover {
    background-color: #f5f3ff;
}

/* 响应式表格 */
.panel-body table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* ========================================
   15. 图片
   ======================================== */
.panel-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1em 0;
    display: block;
}

.panel-body figure {
    margin: 1.5em 0;
}

.panel-body figure img {
    margin: 0;
}

.panel-body figcaption {
    text-align: center;
    font-size: 0.875em;
    color: #6b7280;
    margin-top: 0.5em;
    font-style: italic;
}

/* ========================================
   16. 分隔线
   ======================================== */
.panel-body hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, #e5e7eb, transparent);
    margin: 2em 0;
}

/* ========================================
   17. 卡片
   ======================================== */
.panel-body .card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1.25em;
    margin: 0 0 1.5em 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.panel-body .card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.panel-body .card-title {
    font-size: 1.1em;
    font-weight: 600;
    margin: 0 0 0.75em 0;
    color: #1f2937;
}

.panel-body .card p:last-child {
    margin-bottom: 0;
}

.panel-body .card-highlight {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-color: #a5b4fc;
}

/* ========================================
   18. 警告框
   ======================================== */
.panel-body .alert {
    padding: 1em 1.25em;
    border-radius: 8px;
    border-left: 4px solid;
    margin: 0 0 1.5em 0;
}

.panel-body .alert p:last-child {
    margin-bottom: 0;
}

.panel-body .alert-info {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1e40af;
}

.panel-body .alert-success {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #166534;
}

.panel-body .alert-warning {
    background: #fffbeb;
    border-color: #f59e0b;
    color: #92400e;
}

.panel-body .alert-error {
    background: #fef2f2;
    border-color: #ef4444;
    color: #991b1b;
}

/* ========================================
   19. 折叠面板
   ======================================== */
.panel-body details {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin: 0 0 1.5em 0;
    overflow: hidden;
}

.panel-body details summary {
    font-weight: 600;
    padding: 1em 1.25em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #374151;
    transition: background 0.15s ease;
    user-select: none;
}

.panel-body details summary:hover {
    background: #f9fafb;
}

.panel-body details summary::after {
    content: '›';
    font-size: 1.25em;
    color: #9ca3af;
    transition: transform 0.2s ease;
}

.panel-body details[open] summary::after {
    transform: rotate(90deg);
}

.panel-body details > *:not(summary) {
    padding: 0 1.25em 1.25em 1.25em;
}

.panel-body details > *:first-child:not(summary) {
    padding-top: 0;
}

/* ========================================
   20. 双栏/三栏布局
   ======================================== */
.panel-body .two-col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5em;
    margin: 0 0 1.5em 0;
}

.panel-body .two-col > * {
    margin: 0;
}

.panel-body .three-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5em;
    margin: 0 0 1.5em 0;
}

.panel-body .three-col > * {
    margin: 0;
}

/* ========================================
   21. 响应式
   ======================================== */
@media (max-width: 768px) {
    .panel-body {
        font-size: 15px;
    }
    
    h1.h2 {
        font-size: 1.65em;
    }
    
    .panel-body h2 {
        font-size: 1.35em;
    }
    
    .panel-body h3 {
        font-size: 1.15em;
    }
    
    .panel-body pre {
        padding: 1em;
        border-radius: 6px;
        font-size: 0.8em;
    }
    
    .panel-body table {
        font-size: 0.85em;
    }
    
    .panel-body .two-col,
    .panel-body .three-col {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .panel-body {
        font-size: 14px;
    }
    
    .panel-body pre {
        margin-left: -1em;
        margin-right: -1em;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
}

/* ========================================
   22. 打印样式
   ======================================== */
@media print {
    .panel-body {
        font-size: 11pt;
        line-height: 1.6;
        color: #000;
    }
    
    .panel-body a {
        color: #000;
        text-decoration: underline;
    }
    
    .panel-body h2,
    .panel-body h3 {
        background: #f5f5f5;
        border-left-color: #666;
    }
    
    .panel-body pre,
    .panel-body blockquote {
        background: #f5f5f5;
        border-color: #ccc;
    }
    
    .panel-body .card {
        box-shadow: none;
        transform: none;
    }
    
    .panel-body details > *:not(summary) {
        display: block !important;
    }
}