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

:root {
    --primary-color: #007AFF;
    --success-color: #34C759;
    --warning-color: #FF9500;
    --danger-color: #FF3B30;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-muted: #999999;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --border-color: #E0E0E0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    padding-bottom: 60px;
}

/* 顶部导航 */
.header {
    background: var(--bg-primary);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 按钮 */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn:active {
    opacity: 0.7;
}

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-sm {
    padding: 4px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

/* 搜索栏 */
.search-bar {
    background: var(--bg-primary);
    padding: 12px 16px;
    display: flex;
    gap: 8px;
}

.search-bar input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.search-bar button {
    flex-shrink: 0;
}

/* 页面容器 */
.main {
    padding: 16px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 16px;
}

.page-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.btn-back {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    cursor: pointer;
    margin-bottom: 12px;
}

/* 筛选栏 */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.form-control {
    flex: 1;
    min-width: 120px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

/* 卡片 */
.card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* 表单 */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 家教列表 */
.teacher-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.teacher-card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    gap: 12px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    cursor: pointer;
}

.teacher-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.teacher-info {
    flex: 1;
}

.teacher-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.teacher-subject {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.teacher-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.teacher-price {
    font-size: 14px;
    font-weight: 600;
    color: var(--danger-color);
}

/* 订单列表 */
.order-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.order-card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.order-no {
    font-size: 12px;
    color: var(--text-muted);
}

.order-status {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
}

.order-status.pending { background: #FFF3E0; color: #FF9500; }
.order-status.paid { background: #E3F2FD; color: #007AFF; }
.order-status.confirmed { background: #E8F5E9; color: #34C759; }
.order-status.completed { background: #E8F5E9; color: #34C759; }

.order-body {
    font-size: 14px;
    color: var(--text-secondary);
}

.order-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.order-amount {
    font-size: 16px;
    font-weight: 600;
    color: var(--danger-color);
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    display: flex;
    border-top: 1px solid var(--border-color);
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
}

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

.nav-icon {
    font-size: 20px;
}

/* 提示框 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 1000;
    display: none;
}

.toast.show {
    display: block;
}

/* 其他 */
.price {
    color: var(--danger-color);
    font-weight: 600;
}

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

.mt-3 {
    margin-top: 12px;
}

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

/* 加载状态 */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.empty {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

/* 支付方式 */
.payment-methods {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.payment-method {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

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

.payment-method img {
    width: 32px;
    height: 32px;
}