/**
 * 采购撮合交易平台 - 全局样式
 * 响应式设计 - 支持 PC 端和移动端
 */

/* ========== 基础重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== 通用工具类 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.text-center {
    text-align: center;
}

.text-primary {
    color: #1890ff;
}

.text-success {
    color: #52c41a;
}

.text-danger {
    color: #f5222d;
}

.text-warning {
    color: #faad14;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ========== 导航栏 ========== */
.navbar {
    background-color: #1890ff;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
    white-space: nowrap;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    margin: 0;
}

.navbar-nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.navbar-nav a:hover {
    background-color: rgba(255,255,255,0.1);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
}

/* ========== 主内容区 ========== */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* ========== 卡片组件 ========== */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1890ff;
    border-left: 4px solid #1890ff;
    padding-left: 0.75rem;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    white-space: nowrap;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-primary {
    background-color: #1890ff;
    color: white;
}

.btn-primary:hover {
    background-color: #40a9ff;
}

.btn-success {
    background-color: #52c41a;
    color: white;
}

.btn-success:hover {
    background-color: #73d13d;
}

.btn-danger {
    background-color: #f5222d;
    color: white;
}

.btn-danger:hover {
    background-color: #ff4d4f;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid #1890ff;
    color: #1890ff;
}

.btn-outline:hover {
    background-color: #1890ff;
    color: white;
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    background-color: white;
}

.form-control:focus {
    outline: none;
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24,144,255,0.2);
}

.form-control::placeholder {
    color: #bfbfbf;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

select.form-control {
    cursor: pointer;
}

/* ========== 表格 ========== */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    background: white;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e8e8e8;
    vertical-align: middle;
}

.table th {
    background-color: #fafafa;
    font-weight: 600;
    color: #333;
    white-space: nowrap;
}

.table tbody tr:hover {
    background-color: #f5f5f5;
}

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

/* ========== 徽章标签 ========== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    font-weight: 500;
    white-space: nowrap;
}

.badge-primary {
    background-color: #e6f7ff;
    color: #1890ff;
}

.badge-success {
    background-color: #f6ffed;
    color: #52c41a;
}

.badge-warning {
    background-color: #fffbe6;
    color: #faad14;
}

.badge-danger {
    background-color: #fff1f0;
    color: #f5222d;
}

.badge-info {
    background-color: #e6fffb;
    color: #13c2c2;
}

/* ========== 统计卡片 ========== */
.stat-card {
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 1rem;
}

.stat-card.blue {
    background: linear-gradient(135deg, #1890ff 0%, #36cfc9 100%);
}

.stat-card.green {
    background: linear-gradient(135deg, #52c41a 0%, #95de64 100%);
}

.stat-card.orange {
    background: linear-gradient(135deg, #fa8c16 0%, #ffd666 100%);
}

.stat-card.purple {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ========== 网格系统 ========== */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333%; max-width: 8.333%; }
.col-2 { flex: 0 0 16.666%; max-width: 16.666%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-5 { flex: 0 0 41.666%; max-width: 41.666%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-7 { flex: 0 0 58.333%; max-width: 58.333%; }
.col-8 { flex: 0 0 66.666%; max-width: 66.666%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-10 { flex: 0 0 83.333%; max-width: 83.333%; }
.col-11 { flex: 0 0 91.666%; max-width: 91.666%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* ========== 页脚 ========== */
.footer {
    background-color: #001529;
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    margin: 0.5rem 0;
}

.footer a {
    color: #1890ff;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* ========== 提示信息 ========== */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

.alert-success {
    background-color: #f6ffed;
    border-color: #b7eb8f;
    color: #52c41a;
}

.alert-danger {
    background-color: #fff1f0;
    border-color: #ffa39e;
    color: #f5222d;
}

.alert-warning {
    background-color: #fffbe6;
    border-color: #ffe58f;
    color: #faad14;
}

.alert-info {
    background-color: #e6f7ff;
    border-color: #91d5ff;
    color: #096dd9;
}

/* ========== 加载动画 ========== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(24,144,255,0.3);
    border-radius: 50%;
    border-top-color: #1890ff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #999;
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state-text {
    font-size: 1rem;
    margin-bottom: 1rem;
}

/* ========== 响应式断点 ========== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #1890ff;
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }
    
    .navbar-nav.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .container {
        padding: 0 10px;
    }
    
    .card {
        padding: 1rem;
    }
    
    .row {
        margin: 0 -10px;
    }
    
    .col, [class*="col-"] {
        padding: 0 10px;
    }
    
    /* 移动端单列布局 */
    .col-3, .col-4, .col-6 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.375rem 1rem;
        font-size: 0.875rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 1rem 0;
    }
    
    .card-title {
        font-size: 1.125rem;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .navbar, .footer, .btn, .no-print {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}