/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #263238;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 响应式图片 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 链接样式 */
a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* 表单元素样式 */
input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

/* 核心卡片悬停效果 */
.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: #263238;
}

/* 按钮样式 */
button, .btn {
    cursor: pointer;
    border: none;
    outline: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

button:hover, .btn:hover {
    transform: translateY(-1px);
}

button:active, .btn:active {
    transform: translateY(0);
}

/* 表单样式 */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    transition: all 0.3s ease;
    background-color: #ffffff;
}

.form-input:focus {
    border-color: #1E88E5;
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
    outline: none;
}

/* 数据卡片样式 */
.data-card {
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    background-color: #ffffff;
}

.data-card .number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #1E88E5;
    margin-bottom: 0.5rem;
}

.data-card .title {
    color: #616161;
    margin-bottom: 0.25rem;
}

.data-card .subtitle {
    color: #9e9e9e;
    font-size: 0.875rem;
}

/* 图表容器样式 */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* 案例标签 */
.case-badge {
    background-color: #FF9800;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* 强调文字 */
.highlight {
    color: #1E88E5;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    .data-card .number {
        font-size: 2rem;
    }
    
    .chart-container {
        height: 250px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    .data-card {
        padding: 1rem;
    }
    
    .data-card .number {
        font-size: 1.75rem;
    }
}