/* ================================================================
   user-purchase.css - 会员购买页面专属样式
   依赖：base.css（CSS 变量、Reset、通用按钮）
   职责：购买页面各区块样式（头部、套餐卡片、支付方式、订单摘要、购买须知）
   ================================================================ */

/* ---- 工具类 ---- */
.u-hidden {
    display: none !important;
}
.purchase-page {
    min-height: 100vh;
    background: var(--color-bg);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.purchase-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

/* ================================================================
   加载骨架屏
   ================================================================ */

.purchase-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-3xl) 0;
}

.skeleton {
    background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-border) 50%, var(--color-border-light) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.skeleton-title {
    width: 200px;
    height: 32px;
    border-radius: var(--radius-lg);
}

.skeleton-desc {
    width: 300px;
    height: 18px;
}

.skeleton-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    width: 100%;
    max-width: 960px;
    margin-top: var(--spacing-xl);
}

.skeleton-card {
    height: 360px;
    border-radius: var(--radius-xl);
}

@keyframes skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ================================================================
   错误状态
   ================================================================ */

.purchase-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-3xl) 0;
}

.error-icon {
    font-size: 48px;
    color: var(--color-text-muted);
}

.error-text {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
}

/* ================================================================
   区块一：页面头部
   ================================================================ */

.purchase-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.purchase-header .page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.purchase-header .page-desc {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
}

/* ================================================================
   区块二：套餐卡片网格
   ================================================================ */

.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.plan-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    cursor: pointer;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.plan-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.plan-card.selected {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.plan-card.recommended {
    border-color: var(--color-warning);
    background: linear-gradient(180deg, #FFFBEB 0%, var(--color-card) 60px);
}

.plan-card.recommended.selected {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

/* ---- 角标 ---- */

.plan-tag {
    position: absolute;
    top: 0;
    right: var(--spacing-lg);
    transform: translateY(-50%);
    background: var(--color-danger);
    color: var(--color-text-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.plan-card.recommended .plan-tag {
    background: var(--color-warning);
    color: #fff;
}

/* ---- 套餐名称 ---- */

.plan-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-top: var(--spacing-sm);
}

/* ---- 价格区 ---- */

.plan-price-area {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.plan-price-current {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
}

.plan-price-current .currency {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.plan-price-original {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-decoration: line-through;
}

/* ---- 权益天数 ---- */

.plan-duration {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: 2px 10px;
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    display: inline-block;
    align-self: flex-start;
}

/* ---- 描述 ---- */

.plan-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ---- 特性列表 ---- */

.plan-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
}

.plan-features li {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    line-height: 1.5;
}

.plan-features li .feature-check {
    color: var(--color-success);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ---- 推荐横幅 ---- */

.plan-recommended-badge {
    position: absolute;
    top: var(--spacing-lg);
    left: 0;
    background: var(--color-warning);
    color: #fff;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 12px 2px 10px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ================================================================
   区块三：支付方式选择区
   ================================================================ */

.payment-section {
    margin-bottom: var(--spacing-3xl);
}

.payment-section .section-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    max-width: 720px;
    margin: 0 auto;
}

.payment-method-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
}

.payment-method-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.payment-method-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}

.payment-method-card .payment-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    /* 数据驱动颜色：图标色值由 JS 以 CSS 变量 --pcolor 注入（替代内联 style="color:..."） */
    color: var(--pcolor, #999);
}

.payment-method-card .payment-info {
    flex: 1;
    min-width: 0;
}

.payment-method-card .payment-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
}

.payment-method-card .payment-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.payment-method-card .payment-radio {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-base);
}

.payment-method-card.selected .payment-radio {
    border-color: var(--color-primary);
}

.payment-method-card.selected .payment-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* ================================================================
   区块四：订单摘要
   ================================================================ */

.order-summary {
    position: sticky;
    bottom: 0;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--spacing-lg) var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    z-index: 10;
}

.order-summary .summary-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.order-summary .summary-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.order-summary .summary-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

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

.order-summary .summary-value.price {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-primary);
}

.order-summary .btn-purchase {
    padding: 12px 40px;
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    background: var(--color-primary);
    color: var(--color-text-white);
    transition: background var(--transition-base), opacity var(--transition-base);
    white-space: nowrap;
}

.order-summary .btn-purchase:hover {
    background: var(--color-primary-hover);
}

.order-summary .btn-purchase:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

/* ================================================================
   区块五：购买须知
   ================================================================ */

.purchase-notice {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-3xl);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ================================================================
   Toast 提示
   ================================================================ */

.purchase-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text-primary);
    color: var(--color-text-white);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    z-index: 1000;
    box-shadow: var(--shadow-xl);
    animation: toast-in var(--transition-base) ease;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ================================================================
   响应式
   ================================================================ */

@media (max-width: 1024px) {
    .plans-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .payment-methods {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .purchase-page {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .plans-grid {
        grid-template-columns: 1fr;
    }

    .payment-methods {
        grid-template-columns: 1fr;
    }

    .skeleton-cards {
        grid-template-columns: 1fr;
    }

    .order-summary {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .order-summary .summary-left {
        gap: var(--spacing-md);
    }

    .order-summary .btn-purchase {
        width: 100%;
        text-align: center;
    }

    .plan-card {
        padding: var(--spacing-lg);
    }
}