/* -------------------------------------------------------------------------------------------------
   基础布局
------------------------------------------------------------------------------------------------- */
body {
    font-family: Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.title {
    text-align: center;
    padding: 30px 0;
    color: #333;
}

.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    /* 缩小卡片间距 */
    justify-content: center;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* -------------------------------------------------------------------------------------------------
   卡片样式
------------------------------------------------------------------------------------------------- */
.card {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    /* 缩小内边距 */
    flex: 1 1 calc(33.333% - 16px);
    /* 调整布局 */
    max-width: 350px;
    min-width: 280px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 10px;
    /* 缩小子元素间距 */
}

.card-header {
    font-size: 1.2em;
    margin-bottom: 8px;
    color: #000;
    border-bottom: 1px solid #ddd;
    padding-bottom: 8px;
    text-align: left;
    /* 左对齐 */
}

/* -------------------------------------------------------------------------------------------------
   内容元素样式
------------------------------------------------------------------------------------------------- */
.card-paragraph {
    margin: 8px 0;
    /* 缩小段落间距 */
    line-height: 1.4;
    color: #666;
    font-size: 0.95em;
    text-align: left;
    /* 左对齐 */
}

/* 表单元素左对齐 */
.card-input,
.card-select {
    width: 100%;
    margin: 8px 0;
    /* 缩小间距 */
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    transition: border-color 0.3s;
    box-sizing: border-box;
    text-align: left;
    /* 输入框内容左对齐 */
}

.card-input:focus,
.card-select:focus {
    border-color: #007bff;
    outline: none;
}

.action-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
    margin: 8px 0;
    /* 缩小按钮间距 */
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.btn-group .action-btn {
    flex: 1 1 0%;
    margin: 0;
}

.checkbox-group {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 8px 0;
    text-align: left;
    /* 左对齐 */
}

.card-checkbox {
    margin-right: 4px;
}

/* -------------------------------------------------------------------------------------------------
   悬浮效果
------------------------------------------------------------------------------------------------- */
.card:hover {
    transform: translateY(-2px) scale(1.005);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

/* -------------------------------------------------------------------------------------------------
   响应式调整
------------------------------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .card {
        flex: 1 1 calc(50% - 16px);
    }
}

@media (max-width: 768px) {
    .card {
        flex: 100%;
        max-width: 100%;
    }

    .btn-group .action-btn {
        flex: 100% 1 auto;
    }
}

.footer {
    text-align: center;
    margin-top: 32px;
    padding: 16px 0;
    color: #666;
    font-size: 0.9em;
}