/* 基础样式 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
    padding-bottom: 70px;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

.btn-link {
    background-color: transparent;
    color: var(--primary-color);
}

.btn-link:hover {
    text-decoration: underline;
}

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

/* 头部样式 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 80px 20px;
    text-align: center;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.page-header {
    background-color: white;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
}

.page-header h1 {
    font-size: 1.8rem;
    color: var(--dark-color);
}

/* 卡片样式 */
.feature-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card h3 {
    margin-bottom: 10px;
    color: var(--dark-color);
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: white;
    display: flex;
    justify-content: space-around;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    text-decoration: none;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.nav-item i {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.nav-item.active {
    color: var(--primary-color);
}

/* 网格布局 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

/* 产品卡片 */
.product-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 15px;
    box-shadow: var(--shadow);
}

.product-card h4 {
    margin-bottom: 10px;
    color: var(--dark-color);
}

.product-price {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.product-stock {
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.product-config {
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-family: monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
}

/* 支付页面 */
.payment-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto;
}

.payment-summary {
    margin-bottom: 20px;
}

.payment-summary h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.payment-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.payment-balance {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

/* 我的页面 */
.profile-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    text-align: center;
}

.avatar-circle {
    width: 80px;
    height: 80px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    margin: 0 auto 15px;
}

.profile-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
}

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

.stat-label {
    display: block;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--dark-color);
}

/* 兑换码表单 */
.redeem-form {
    display: flex;
    margin-bottom: 15px;
}

.redeem-form input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    outline: none;
}

.redeem-form button {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* 机器列表 */
.machine-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.machine-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 15px;
    box-shadow: var(--shadow);
}

.machine-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.machine-info {
    margin-bottom: 15px;
}

.info-row {
    display: flex;
    margin-bottom: 8px;
}

.info-label {
    font-weight: bold;
    width: 80px;
    color: var(--gray-color);
}

.info-value {
    flex: 1;
    word-break: break-all;
}

.machine-actions {
    display: flex;
    gap: 10px;
}

.machine-actions .btn {
    flex: 1;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.empty-state i {
    font-size: 3rem;
    color: var(--gray-color);
    margin-bottom: 20px;
}

.empty-state p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

/* 登录/注册页面 */
.auth-container {
    max-width: 500px;
    margin: 50px auto;
}

.auth-form {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--dark-color);
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

/* 提示框 */
.alert {
    padding: 10px 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 分类标题 */
.category-title {
    margin: 30px 0 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    color: var(--dark-color);
}

.subcategory-title {
    margin: 20px 0 10px;
    color: var(--dark-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero {
        padding: 60px 15px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
}