/* common.css - 全站通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", Arial, sans-serif;
}
body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
/* 头部样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
    margin-bottom: 20px;
}
.header .inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header .logo {
    font-size: 20px;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
}
.header .nav a {
    color: #666;
    text-decoration: none;
    padding: 8px 15px;
    margin: 0 5px;
    border-radius: 4px;
    transition: all 0.3s;
}
.header .nav a:hover, .header .nav a.active {
    color: #007bff;
    background-color: #e8f4ff;
}
/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 20px;
    margin-bottom: 20px;
}
/* 表单样式 */
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}
.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border 0.3s;
}
.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
}
/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}
.btn-primary {
    background-color: #007bff;
    color: #fff;
}
.btn-primary:hover {
    background-color: #0069d9;
}
.btn-danger {
    background-color: #dc3545;
    color: #fff;
}
.btn-danger:hover {
    background-color: #c82333;
}
.btn-secondary {
    background-color: #6c757d;
    color: #fff;
}
.btn-secondary:hover {
    background-color: #5a6268;
}
/* 提示信息 */
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}
.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
/* 响应式适配 */
@media (max-width: 768px) {
    .header .inner {
        flex-direction: column;
        gap: 10px;
    }
    .header .nav {
        width: 100%;
        text-align: center;
    }
    .form-control {
        font-size: 13px;
    }
}
/* 供需标签 */
.info-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-right: 8px;
}
.tag-supply {
    background: #d4edda;
    color: #155724;
}
.tag-demand {
    background: #fff3cd;
    color: #856404;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin: 20px 0;
}

/* 选项卡样式 */
.tabs {
    display: flex;
    border-bottom: 2px solid #eee;
    margin-bottom: 20px;
}
.tab-btn {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 16px;
    color: #666;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}
.tab-btn:hover {
    color: #007bff;
}
.tab-btn.active {
    color: #007bff;
    border-bottom-color: #007bff;
    font-weight: bold;
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* 类型选择 */
.type-option {
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}
.type-option.selected {
    border-color: #007bff;
    background-color: #f0f8ff;
}
.type-option input[type="radio"] {
    display: none;
}

/* 列标题 */
.column-title {
    text-align: center;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 6px;
    font-weight: bold;
}
.supply-title {
    background: #d4edda;
    color: #155724;
}
.demand-title {
    background: #fff3cd;
    color: #856404;
}

/* 分栏布局 */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
@media (max-width: 768px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}