/* 发卡密商城 - 主样式文件 */

/* ==================== CSS 变量 ==================== */
:root {
    /* 主色调 */
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-color: #764ba2;
    
    /* 文字颜色 */
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    
    /* 背景颜色 */
    --bg-primary: #f7fafc;
    --bg-secondary: #edf2f7;
    --bg-card: #ffffff;
    
    /* 边框 */
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    
    /* 状态颜色 */
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --error-color: #f56565;
    --info-color: #4299e1;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--secondary-color);
}

img {
    max-width: 100%;
    height: auto;
}

/* ==================== 布局 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 40px 0;
}

/* ==================== 头部 ==================== */
.header {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: var(--primary-color);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* ==================== 表单 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    background: var(--bg-card);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-control::placeholder {
    color: var(--text-light);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* ==================== 产品网格 ==================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    height: 180px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 8px;
}

.product-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--error-color);
}

.product-price small {
    font-size: 0.9rem;
    font-weight: normal;
}

.product-stock {
    font-size: 0.85rem;
    color: var(--text-light);
}

.product-stock.low {
    color: var(--warning-color);
}

.product-stock.out {
    color: var(--error-color);
}

/* ==================== 分类标签 ==================== */
.categories {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.category-tag {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.category-tag:hover,
.category-tag.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

/* ==================== 订单页面 ==================== */
.order-section {
    max-width: 600px;
    margin: 0 auto;
}

.order-info {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
}

.order-info h2 {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.order-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--bg-secondary);
}

.order-row:last-child {
    border-bottom: none;
}

.order-row .label {
    color: var(--text-secondary);
}

.order-row .value {
    font-weight: 600;
    color: var(--text-primary);
}

.order-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.order-status.pending {
    background: rgba(237, 137, 54, 0.1);
    color: var(--warning-color);
}

.order-status.paid,
.order-status.completed {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
}

.order-status.cancelled {
    background: rgba(245, 101, 101, 0.1);
    color: var(--error-color);
}

/* ==================== 卡密展示 ==================== */
.cards-list {
    margin-top: 20px;
}

.card-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 16px;
    margin-bottom: 12px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    word-break: break-all;
    position: relative;
}

.card-item .copy-btn {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    padding: 6px 12px;
    font-size: 0.85rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition-fast);
}

.card-item:hover .copy-btn {
    opacity: 1;
}

/* ==================== 加载和提示 ==================== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

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

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* ==================== Toast 提示 ==================== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 16px 20px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease;
    max-width: 350px;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* ==================== 模态框 ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* ==================== 底部 ==================== */
.footer {
    background: var(--text-primary);
    color: var(--text-light);
    padding: 40px 0;
    margin-top: auto;
}

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

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-light);
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    font-size: 0.9rem;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .nav {
        display: none;
    }
    
    .main-content {
        padding: 20px 0;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 16px;
    }
    
    .categories {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }
    
    .category-tag {
        flex-shrink: 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* ==================== 支付方式选择 ==================== */
.payment-methods {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.payment-method {
    flex: 1;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.payment-method:hover {
    border-color: var(--primary-color);
}

.payment-method.active {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.payment-method-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.payment-method-name {
    font-weight: 600;
}

/* ==================== 数量选择器 ==================== */
.quantity-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.quantity-btn {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.quantity-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.quantity-input {
    width: 60px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
}