/* ========== 基础样式重置与通用设置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

.article-body {
    line-height: 1.8;
    font-size: 17px;
    color: #333;
    font-family: "Microsoft YaHei", sans-serif;
    background-color: #f8f9fa;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ========== CSS自定义属性（设计令牌） ========== */
:root {
    /* 间距系统 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;
    --spacing-xxl: 32px;
    
    /* 边框半径 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 10px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.08);
    --shadow-lg: 0 5px 15px rgba(0,0,0,0.12);
    
    /* 动画时间 */
    --transition-fast: 0.15s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

/* ========== 标题类 ========== */
.section-title-large {
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
    padding-bottom: 12px;
    margin-top: 45px;
    margin-bottom: 25px;
    font-size: 1.6em;
    font-weight: 600;
}

.sub-title-large {
    color: #1a5fb4;
    margin-top: 28px;
    margin-bottom: 15px;
    font-size: 1.25em;
    font-weight: 600;
}

/* ========== 核心摘要类 ========== */
.core-summary {
    background-color: #fff8f0;
    border-left: 5px solid #ff8c00;
    padding: 22px;
    margin: 28px 0;
    font-size: 1.08em;
    line-height: 1.75;
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
}

.strategic-significance {
    background-color: #f0f8ff;
    border-left: 5px solid #4169e1;
    padding: 25px;
    margin: 30px 0;
    line-height: 1.8;
    border-radius: var(--radius-md);
}

/* ========== 通用卡片式容器样式 ========== */
.case-card,
.system-card,
.strategy-card,
.dimension,
.principle-detail,
.core-summary,
.strategic-significance,
.lawyer-insight,
.conclusion-call {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal) ease, 
                box-shadow var(--transition-normal) ease;
}

.case-card:hover,
.system-card:hover,
.strategy-card:hover,
.dimension:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* 左侧边框高亮变体 */
.border-left-primary { border-left: 4px solid #3498db; }
.border-left-success { border-left: 4px solid #2ecc71; }
.border-left-warning { border-left: 4px solid #ffa726; }
.border-left-danger { border-left: 4px solid #e74c3c; }

/* ========== 渐变色背景容器 ========== */
.gradient-bg,
.cross-border-comparison,
.preservation-strategy,
.case-outcome-summary {
    background: linear-gradient(135deg, #f8f9ff 0%, #f5f7ff 100%);
    border: 2px solid #e0e7ff;
    padding: var(--spacing-xl);
    margin: var(--spacing-xxl) 0;
    border-radius: var(--radius-xl);
    position: relative;
}

/* 带图标的标题 */
.icon-title {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    color: #2c3e50;
    font-weight: 600;
    font-size: 1.1em;
}

.icon-title:before {
    margin-right: var(--spacing-sm);
    font-size: 1.2em;
}

/* ========== 网格布局系统 ========== */
.grid-container,
.dimension-box,
.strategy-grid,
.legal-system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: clamp(var(--spacing-sm), 2vw, var(--spacing-lg));
    margin: var(--spacing-xl) 0;
}

/* 策略卡片颜色变体 */
.strategy-card-1 { border-left-color: #3498db; } /* 调查/分析 */
.strategy-card-2 { border-left-color: #2ecc71; } /* 申请/行动 */
.strategy-card-3 { border-left-color: #e74c3c; } /* 效果/影响 */
.strategy-card-4 { border-left-color: #9b59b6; } /* 结果/目标 */

/* ========== 法律要点类 ========== */
.principle-detail {
    background-color: #fff;
    border: 1px solid #ced4da;
    box-shadow: 0 3px 6px rgba(0,0,0,0.05);
}

.principle-item {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px dashed #e9ecef;
}

.principle-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* ========== 步骤流程类 ========== */
.verification-steps {
    background-color: #f9fff9;
    border: 2px dashed #7bcfa2;
    padding: 25px;
    margin: 30px 0;
    border-radius: var(--radius-lg);
}

.flow-step {
    counter-increment: step-counter;
    margin: 30px 0;
    padding-left: 70px;
    position: relative;
    line-height: 1.8;
    min-height: 60px;
}

.flow-step:before {
    content: counter(step-counter);
    background-color: #20b2aa;
    color: white;
    font-weight: bold;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    left: 0;
    top: 0;
    font-size: 1.2em;
    box-shadow: 0 3px 6px rgba(32, 178, 170, 0.3);
}

.framework-step {
    counter-increment: framework-counter;
    margin-bottom: 35px;
    padding-left: 80px;
    position: relative;
    min-height: 70px;
}

.framework-step:before {
    content: counter(framework-counter);
    background-color: #4682b4;
    color: white;
    font-weight: bold;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    left: 0;
    top: 0;
    font-size: 1.3em;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.step-title {
    color: #2e8b57;
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 1.1em;
}

/* ========== 分析框架类 ========== */
.dimension-box {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 25px 0;
}

.dimension {
    flex: 1;
    min-width: min(300px, 100%);
    padding: 20px;
    border-radius: var(--radius-md);
    border-top: 4px solid;
}

.dim-1 {
    background-color: #fff5f5;
    border-top-color: #dc3545;
}

.dim-2 {
    background-color: #f0fff4;
    border-top-color: #28a745;
}

.dim-3 {
    background-color: #f0f9ff;
    border-top-color: #17a2b8;
}

.blueprint-framework {
    background-color: #f5f5f5;
    border: 2px solid #ddd;
    padding: 25px;
    margin: 30px 0;
    border-radius: var(--radius-lg);
}

/* ========== 时间线样式 ========== */
.timeline,
.timeline-container {
    position: relative;
    padding-left: 30px;
    margin: var(--spacing-xxl) 0;
}

.timeline:before,
.timeline-container:before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #3498db, #9b59b6);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-lg);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item:before {
    content: "";
    position: absolute;
    left: -36px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #3498db;
    border: 3px solid white;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

.timeline-date {
    color: #7f8c8d;
    font-size: 0.9em;
    margin-bottom: 5px;
}

.timeline-content {
    background: #f8f9fa;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 3px solid #3498db;
}

/* ========== 结果/要点列表 ========== */
.result-list,
.icon-list,
.evidence-list {
    background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
    border: 2px solid #2ecc71;
    padding: var(--spacing-xl);
    margin: var(--spacing-xxl) 0;
    border-radius: var(--radius-xl);
}

.result-item,
.icon-item,
.evidence-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px dashed #c8e6c9;
}

.result-item:last-child,
.icon-item:last-child,
.evidence-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.result-icon,
.evidence-icon {
    color: #27ae60;
    font-size: 1.2em;
    margin-right: var(--spacing-sm);
    min-width: 24px;
}

/* ========== 法律条款展示框 ========== */
.law-article {
    background-color: #f0f8ff;
    border-left: 5px solid #4169e1;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.law-article-title {
    color: #1a5fb4;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    font-size: 1.1em;
}

/* ========== 对比表格类 ========== */
.case-contrast {
    background-color: #fffaf0;
    border: 1px solid #ffc107;
    padding: 25px;
    margin: 30px 0;
    border-radius: var(--radius-md);
}

/* 表格样式优化 */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    font-size: 0.95em;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

.comparison-table thead {
    background-color: #2c3e50;
    color: white;
    text-align: left;
}

.comparison-table th,
.comparison-table td {
    padding: 15px 20px;
    border-bottom: 1px solid #e9ecef;
}

.comparison-table tbody tr:nth-of-type(even) {
    background-color: #f8f9fa;
}

.comparison-table tbody tr:last-of-type {
    border-bottom: 2px solid #2c3e50;
}

.comparison-table tbody tr:hover {
    background-color: #f1f7ff;
}

.feature-true {
    color: #2e8b57;
    font-weight: 600;
}

.feature-false {
    color: #e74c3c;
    font-weight: 600;
}

/* ========== 提示与警告类 ========== */
.lawyer-insight {
    background-color: #fdf5e6;
    border: 2px solid #ffd700;
    font-style: normal;
}

.caution-box {
    background-color: #ffe6e6;
    border: 1px solid #ff9999;
    padding: 15px;
    margin: 20px 0;
    border-radius: var(--radius-md);
    font-size: 0.95em;
}

.tip-box {
    background-color: #f0f9ff;
    border: 1px solid #b3e0ff;
    padding: 15px;
    margin: 20px 0;
    border-radius: var(--radius-md);
}

.note-box {
    background-color: #f4f4f4;
    padding: 15px;
    margin: 20px 0;
    border-left: 4px solid #95a5a6;
    font-style: italic;
}

/* ========== 专业写作类 ========== */
.conclusion-call {
    background-color: #e6f7ff;
    border: 2px solid #1890ff;
    text-align: left;
    border-radius: var(--radius-xl);
    font-weight: bold;
}

/* ========== 文本修饰类 ========== */
.key-point {
    font-weight: bold;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    border-left: 2px solid;
    display: inline-block;
}

/* 颜色变体 */
.key-point.warning { color: #e74c3c; background-color: #ffe6e6; border-left-color: #e74c3c; }
.key-point.success { color: #2e8b57; background-color: #f0fff0; border-left-color: #2e8b57; }
.key-point.info { color: #1a5fb4; background-color: #e6f3ff; border-left-color: #1a5fb4; }

/* ========== 移动端优化 ========== */
@media (max-width: 768px) {
    :root {
        --spacing-xs: 6px;
        --spacing-sm: 8px;
        --spacing-md: 12px;
        --spacing-lg: 16px;
        --spacing-xl: 18px;
        --spacing-xxl: 24px;
    }
    
    .article-body {
        padding: var(--spacing-md);
        width: 100%;
        max-width: 100%;
        font-size: 16px;
        line-height: 1.7;
    }
    
    /* 统一所有内容盒子的宽度和边距 */
    .core-summary,
    .strategic-significance,
    .principle-detail,
    .verification-steps,
    .case-contrast,
    .lawyer-insight,
    .caution-box,
    .tip-box,
    .note-box,
    .conclusion-call,
    .dimension,
    .blueprint-framework,
    .principle-item,
    .case-card,
    .system-card,
    .strategy-card,
    .gradient-bg,
    .cross-border-comparison,
    .preservation-strategy,
    .case-outcome-summary,
    .result-list,
    .icon-list,
    .evidence-list,
    .law-article {
        width: 100%;
        margin: var(--spacing-lg) auto;
        padding: var(--spacing-lg);
        min-width: unset;
        max-width: 100%;
    }
    
    /* 网格布局响应式 */
    .grid-container,
    .dimension-box,
    .strategy-grid,
    .legal-system-grid {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-md);
        margin: var(--spacing-lg) 0;
    }
    
    .dimension,
    .system-card,
    .strategy-card {
        flex: 1 0 100% !important;
        min-width: 100% !important;
        margin-bottom: var(--spacing-md);
    }
    
    /* 统一dimension盒子的显示 */
    .dimension-box {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    /* 渐变色优化 */
    .gradient-bg,
    .preservation-strategy,
    .cross-border-comparison,
    .case-outcome-summary {
        background: #f8f9ff;
        padding: var(--spacing-lg);
        border-width: 1px;
    }
    
    /* 调整流程步骤的布局 */
    .flow-step,
    .framework-step {
        padding-left: 55px;
        min-height: 50px;
        margin: var(--spacing-lg) 0;
    }
    
    .flow-step:before {
        width: 40px;
        height: 40px;
        font-size: 1em;
    }
    
    .framework-step:before {
        width: 45px;
        height: 45px;
        font-size: 1.1em;
    }
    
    /* 时间线响应式 */
    .timeline,
    .timeline-container {
        padding-left: 25px;
        margin: var(--spacing-lg) 0;
    }
    
    .timeline:before,
    .timeline-container:before {
        width: 2px;
    }
    
    .timeline-item:before {
        left: -31px;
        width: 10px;
        height: 10px;
        border: 2px solid white;
    }
    
    .timeline-content {
        padding: var(--spacing-md);
    }
    
    /* 列表项响应式 */
    .result-list,
    .icon-list,
    .evidence-list {
        padding: var(--spacing-lg);
    }
    
    .result-item,
    .icon-item,
    .evidence-item {
        padding: var(--spacing-sm) 0;
        margin-bottom: var(--spacing-sm);
        flex-direction: column;
        align-items: flex-start;
    }
    
    .result-icon,
    .evidence-icon {
        margin-right: 0;
        margin-bottom: var(--spacing-xs);
    }
    
    /* 禁用不必要的悬停效果 */
    .case-card:hover,
    .system-card:hover,
    .strategy-card:hover,
    .dimension:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }
    
    /* 调整表格显示 */
    .comparison-table {
        font-size: 0.85em;
        display: block;
        overflow-x: auto;
        width: 100%;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 15px;
        white-space: nowrap;
    }
    
    /* 边框优化 */
    .border-left-primary,
    .border-left-success,
    .border-left-warning,
    .border-left-danger,
    .strategy-card-1,
    .strategy-card-2,
    .strategy-card-3,
    .strategy-card-4 {
        border-left-width: 3px;
    }
    
    /* 调整标题间距 */
    .section-title-large {
        margin-top: 35px;
        margin-bottom: 20px;
        font-size: 1.4em;
    }
    
    .sub-title-large {
        margin-top: 25px;
        margin-bottom: 12px;
        font-size: 1.15em;
    }
    
    /* 图标标题调整 */
    .icon-title {
        font-size: 1em;
    }
    
    .icon-title:before {
        font-size: 1em;
        margin-right: var(--spacing-xs);
    }
    
    /* 法律条款框优化 */
    .law-article {
        padding: var(--spacing-md);
        font-size: 0.95em;
        line-height: 1.6;
    }
    
    .law-article-title {
        font-size: 1em;
    }
}

/* 移动端小屏幕进一步优化 */
@media (max-width: 480px) {
    :root {
        --spacing-xs: 4px;
        --spacing-sm: 6px;
        --spacing-md: 10px;
        --spacing-lg: 14px;
        --spacing-xl: 16px;
        --spacing-xxl: 20px;
    }
    
    .article-body {
        font-size: 15px;
        line-height: 1.6;
        padding: var(--spacing-sm);
    }
    
    .core-summary,
    .strategic-significance,
    .principle-detail,
    .verification-steps,
    .case-contrast,
    .lawyer-insight,
    .caution-box,
    .tip-box,
    .note-box,
    .conclusion-call,
    .dimension,
    .blueprint-framework,
    .case-card,
    .system-card,
    .strategy-card {
        padding: var(--spacing-md);
        margin: var(--spacing-md) 0;
        border-radius: var(--radius-md);
    }
    
    .flow-step,
    .framework-step {
        padding-left: 50px;
    }
    
    .flow-step:before {
        width: 35px;
        height: 35px;
    }
    
    .framework-step:before {
        width: 40px;
        height: 40px;
    }
    
    .section-title-large {
        font-size: 1.3em;
    }
    
    .sub-title-large {
        font-size: 1.1em;
    }
    
    /* 进一步简化渐变和阴影 */
    .gradient-bg {
        background: #f8f9fa;
        box-shadow: inset 0 0 0 1px #e0e7ff;
    }
    
    /* 时间线进一步简化 */
    .timeline {
        padding-left: 20px;
    }
    
    .timeline-item:before {
        left: -26px;
        width: 8px;
        height: 8px;
    }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
    /* 为触摸设备提供更好的交互 */
    .case-card,
    .system-card,
    .strategy-card,
    .dimension {
        -webkit-tap-highlight-color: transparent;
    }
    
    /* 增加触摸目标大小 */
    button, 
    .clickable-item {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* 使用active状态替代hover */
    .case-card:active,
    .system-card:active,
    .strategy-card:active,
    .dimension:active {
        transform: scale(0.98);
        transition: transform var(--transition-fast) ease;
    }
}

/* ========== 安全区域适配（全面屏手机） ========== */
@supports (padding: max(0px)) {
    .article-body,
    .case-card,
    .gradient-bg,
    .core-summary,
    .strategic-significance {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
}

/* ========== 减少动画偏好设置 ========== */
@media (prefers-reduced-motion: reduce) {
    .case-card,
    .system-card,
    .strategy-card,
    .dimension,
    .timeline-item,
    .flow-step:before,
    .framework-step:before {
        transition: none !important;
        animation: none !important;
        transform: none !important;
    }
}