.ergo-cart-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:998;opacity:0;transition:opacity var(--ergo-trans-med)}
.ergo-cart-overlay.open{opacity:1}
.ergo-cart-drawer{position:fixed;top:0;right:0;bottom:0;width:380px;max-width:90vw;background:var(--ergo-bg);z-index:999;transform:translateX(100%);transition:transform var(--ergo-trans-med);display:flex;flex-direction:column;box-shadow:-4px 0 20px rgba(0,0,0,.1)}
.ergo-cart-drawer.open{transform:translateX(0)}
.ergo-cart-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--ergo-border-light)}
.ergo-cart-head h3{margin:0;font-size:18px;font-weight:700;color:var(--ergo-text)}
.ergo-cart-close{width:32px;height:32px;font-size:24px;line-height:1;color:var(--ergo-text);border-radius:50%;transition:background var(--ergo-trans-fast)}
.ergo-cart-close:hover{background:var(--ergo-bg-soft)}
.ergo-cart-body{flex:1;overflow-y:auto;padding:20px 24px}
.ergo-cart-empty{text-align:center;color:var(--ergo-text-soft);padding:60px 0;font-size:15px}
.ergo-cart-list{display:flex;flex-direction:column;gap:16px}
.ergo-cart-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--ergo-border-light)}
.ergo-cart-item img{width:60px;height:60px;object-fit:cover;border-radius:6px;flex-shrink:0}
.ergo-cart-item-info{flex:1;min-width:0}
.ergo-cart-item-name{font-size:14px;font-weight:500;margin:0 0 4px;color:var(--ergo-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ergo-cart-item-qty{font-size:13px;color:var(--ergo-text-soft);margin:0}
.ergo-cart-foot{border-top:1px solid var(--ergo-border-light);padding:18px 24px;background:var(--ergo-bg)}
.ergo-cart-total{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:16px}
.ergo-cart-total strong{font-weight:700;font-size:20px;color:var(--ergo-blue)}
.ergo-cart-checkout{display:block;width:100%;padding:14px;background:var(--ergo-blue);color:#fff;text-align:center;border-radius:var(--ergo-radius-btn);font-weight:600;font-size:15px;margin-bottom:8px;transition:background var(--ergo-trans-fast)}
.ergo-cart-checkout:hover{background:var(--ergo-blue-deep)}
.ergo-cart-view{display:block;width:100%;padding:12px;background:transparent;color:var(--ergo-blue);text-align:center;border-radius:var(--ergo-radius-btn);font-weight:500;font-size:14px;border:1px solid var(--ergo-border)}
.ergo-cart-view:hover{background:var(--ergo-blue-light)}
.ergo-toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ergo-text);color:#fff;padding:14px 24px;border-radius:var(--ergo-radius-btn);font-size:14px;font-weight:500;z-index:10000;opacity:0;transition:all var(--ergo-trans-med);box-shadow:0 4px 20px rgba(0,0,0,.2)}
.ergo-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* === Cart drawer 移动端 === */
@media (max-width: 768px) {
    .ergo-cart-drawer {
        width: 100%;
        max-width: 100vw;
        right: 0;
        left: 0;
    }
    .ergo-cart-head {
        padding: 14px 16px;
    }
    .ergo-cart-head h3 {
        font-size: 16px;
    }
    .ergo-cart-body {
        padding: 16px;
    }
    .ergo-cart-item {
        padding: 10px 0;
        gap: 10px;
    }
    .ergo-cart-item img {
        width: 50px;
        height: 50px;
    }
    .ergo-cart-item-name {
        font-size: 13px;
    }
    .ergo-cart-item-qty {
        font-size: 12px;
    }
    .ergo-cart-foot {
        padding: 14px 16px;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    }
    .ergo-cart-total {
        font-size: 14px;
        margin-bottom: 12px;
    }
    .ergo-cart-total strong {
        font-size: 18px;
    }
    .ergo-cart-checkout {
        padding: 12px;
        font-size: 14px;
    }
    .ergo-cart-view {
        padding: 10px;
        font-size: 13px;
    }
    .ergo-toast {
        bottom: 20px;
        left: 16px;
        right: 16px;
        transform: translateX(0) translateY(100px);
        max-width: none;
    }
    .ergo-toast.show {
        transform: translateX(0) translateY(0);
    }
}