:root {
    --cart-panel-width: 420px;
}

.cart-toggle-tab {
    position: fixed;
    top: 50%;
    right: 0;
    z-index: 1060;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-width: 58px;
    padding: 0.8rem 0.65rem;
    border: 0;
    border-radius: 0.7rem 0 0 0.7rem;
    background: var(--color-brand-solid);
    color: #fff;
    box-shadow: var(--shadow-md);
    transform: translateY(-50%);
    cursor: pointer;
    transition: right 0.28s ease, background-color 0.2s ease, border-radius 0.2s ease;
}

.cart-toggle-tab:hover,
.cart-toggle-tab:focus-visible {
    background: var(--color-brand-hover);
}

.cart-toggle-tab svg {
    width: 1.45rem;
    height: 1.45rem;
    flex: 0 0 auto;
}

.cart-toggle-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    writing-mode: vertical-rl;
}

.cart-tab-badge {
    display: none;
    min-width: 1.25rem;
    height: 1.25rem;
    align-items: center;
    justify-content: center;
    padding: 0 0.25rem;
    border-radius: 999px;
    background: var(--color-danger);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 800;
    line-height: 1;
}

.cart-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1050;
    display: none;
    background: rgba(16, 24, 40, 0.34);
}

.cart-backdrop.is-visible {
    display: block;
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1055;
    display: flex;
    flex-direction: column;
    width: var(--cart-panel-width);
    max-width: 95vw;
    height: 100dvh;
    overflow: hidden;
    background: var(--color-card);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.28s ease;
}

.cart-sidebar.open {
    transform: translateX(0);
}

.cart-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, var(--color-header-start), var(--color-header-end));
}

.cart-title {
    color: var(--color-text-primary);
    font-size: 1.18rem;
    font-weight: 800;
}

.cart-subtitle {
    margin-top: 0.15rem;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
}

.cart-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    height: 2.2rem;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 0.55rem;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 1.55rem;
    line-height: 1;
    cursor: pointer;
}

.cart-icon-btn:hover,
.cart-icon-btn:focus-visible {
    border-color: var(--color-border);
    background: var(--color-card);
    color: var(--color-brand-hover);
}

.cart-icon-btn svg {
    width: 1.3rem;
    height: 1.3rem;
}

.cart-stepper {
    display: flex;
    align-items: center;
    padding: 0.85rem 1.2rem 0.7rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-card);
}

.cart-step {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text-tertiary);
    font-size: 0.78rem;
    white-space: nowrap;
}

.cart-step span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.45rem;
    height: 1.45rem;
    border: 1px solid var(--color-border-strong);
    border-radius: 50%;
    background: var(--color-bg-section);
    color: var(--color-text-secondary);
    font-size: 0.72rem;
    font-weight: 800;
}

.cart-step.is-active,
.cart-step.is-complete {
    color: var(--color-brand-hover);
}

.cart-step.is-active span,
.cart-step.is-complete span {
    border-color: var(--color-brand);
    background: var(--color-brand-light);
    color: var(--color-brand-hover);
}

.cart-step-line {
    flex: 1;
    height: 1px;
    margin: 0 0.55rem;
    background: var(--color-border);
}

.cart-step-panel {
    display: flex;
    flex: 1;
    min-height: 0;
    flex-direction: column;
}

.cart-panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.2rem 0.7rem;
}

.cart-panel-heading h2 {
    margin: 0;
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 800;
}

.cart-panel-heading p {
    margin: 0.25rem 0 0;
    color: var(--color-text-secondary);
    font-size: 0.78rem;
}

.cart-link-btn {
    flex: 0 0 auto;
    padding: 0.25rem 0;
    border: 0;
    background: transparent;
    color: var(--color-brand-hover);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
}

.cart-link-btn:hover,
.cart-link-btn:focus-visible {
    color: var(--color-brand-solid);
    text-decoration: underline;
}

.cart-item-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 0 1.2rem;
}

.cart-empty {
    display: flex;
    min-height: 12rem;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
    text-align: center;
}

.cart-empty-icon {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--color-brand);
    font-size: 2rem;
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--color-border);
}

.cart-item-main {
    min-width: 0;
    flex: 1;
}

.cart-item-name {
    overflow: hidden;
    color: var(--color-text-primary);
    font-size: 0.86rem;
    font-weight: 750;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cart-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: 0.32rem;
}

.cart-item-type,
.cart-item-cardtype {
    display: inline-block;
    padding: 0.15rem 0.42rem;
    border: 1px solid var(--color-border);
    border-radius: 0.32rem;
    background: var(--color-bg-section);
    color: var(--color-text-secondary);
    font-size: 0.67rem;
    font-weight: 700;
}

.cart-item-cardtype {
    border-color: var(--color-brand);
    background: var(--color-brand-light);
    color: var(--color-brand-hover);
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex: 0 0 auto;
}

.cart-qty-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    border: 1px solid var(--color-brand);
    border-radius: 0.4rem;
    background: var(--color-card);
    color: var(--color-brand-hover);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1;
    cursor: pointer;
}

.cart-qty-btn:hover,
.cart-qty-btn:focus-visible {
    background: var(--color-brand-hover);
    color: #fff;
}

.cart-qty-val {
    min-width: 1.35rem;
    color: var(--color-text-primary);
    font-size: 0.86rem;
    font-weight: 800;
    text-align: center;
}

.cart-remove-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.8rem;
    height: 1.8rem;
    margin-left: 0.15rem;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--color-danger);
    cursor: pointer;
}

.cart-remove-btn:hover,
.cart-remove-btn:focus-visible {
    color: var(--color-danger-hover);
}

.cart-remove-btn svg {
    width: 1rem;
    height: 1rem;
}

.btn-add-cart {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.3rem;
    border: 1px solid transparent;
    border-radius: 0.4rem;
    background: transparent;
    color: var(--color-brand-hover);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-add-cart:hover,
.btn-add-cart:focus-visible {
    border-color: var(--color-brand);
    background: var(--color-brand-light);
    color: var(--color-brand-solid);
}

.cart-step-footer {
    padding: 0.9rem 1.2rem 1.1rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-section);
}

.cart-summary-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    color: var(--color-text-secondary);
    font-size: 0.82rem;
}

.cart-summary-row strong {
    color: var(--color-text-primary);
    font-size: 1rem;
}

.cart-primary-btn,
.cart-secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.65rem;
    padding: 0.65rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.86rem;
    font-weight: 750;
    line-height: 1.2;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.cart-primary-btn {
    width: 100%;
    border: 1px solid var(--color-brand-solid);
    background: var(--color-brand-solid);
    color: #fff;
}

.cart-primary-btn:hover,
.cart-primary-btn:focus-visible {
    border-color: var(--color-brand-hover);
    background: var(--color-brand-hover);
}

.cart-primary-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.cart-secondary-btn {
    border: 1px solid var(--color-border-strong);
    background: var(--color-card);
    color: var(--color-text-secondary);
}

.cart-secondary-btn:hover,
.cart-secondary-btn:focus-visible {
    border-color: var(--color-brand);
    color: var(--color-brand-hover);
}

.cart-contact-summary {
    margin: 0 1.2rem 0.8rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    background: var(--color-bg-section);
    color: var(--color-text-secondary);
    font-size: 0.78rem;
    line-height: 1.55;
}

.cart-checkout-form {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 0 1.2rem 1.1rem;
}

.cart-field {
    margin-bottom: 0.8rem;
}

.cart-field label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--color-text-primary);
    font-size: 0.8rem;
    font-weight: 750;
}

.cart-field label span {
    color: var(--color-danger);
}

.cart-field input {
    display: block;
    width: 100%;
    min-height: 2.55rem;
    padding: 0.58rem 0.7rem;
    border: 1px solid var(--color-border-strong);
    border-radius: 0.45rem;
    background: var(--color-card);
    color: var(--color-text-primary);
    font-size: 0.86rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.cart-field input:focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.cart-field.has-error input {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(180, 35, 24, 0.1);
}

.cart-field-error {
    min-height: 1.1rem;
    margin-top: 0.25rem;
    color: var(--color-danger);
    font-size: 0.74rem;
}

.cart-honeypot {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    clip: rect(0 0 0 0) !important;
    white-space: nowrap !important;
}

.cart-submit-status {
    display: none;
    margin: 0.2rem 0 0.75rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-danger-border);
    border-radius: 0.45rem;
    background: var(--color-danger-bg);
    color: var(--color-danger);
    font-size: 0.78rem;
    line-height: 1.5;
}

.cart-submit-status.is-visible {
    display: block;
}

.cart-submit-status.is-warning {
    border-color: var(--color-warning-border);
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.cart-success-panel {
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.35rem;
    color: var(--color-text-primary);
    text-align: center;
}

.cart-success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: var(--color-success-bg);
    color: var(--color-success);
    font-size: 2rem;
    font-weight: 800;
}

.cart-success-panel h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 800;
}

.cart-success-panel p {
    margin: 0.55rem 0 1.2rem;
    color: var(--color-text-secondary);
    font-size: 0.84rem;
    line-height: 1.6;
}

.cart-order-number {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    width: 100%;
    margin-bottom: 1.35rem;
    padding: 0.75rem;
    border: 1px solid var(--color-success-border);
    border-radius: 0.55rem;
    background: var(--color-success-bg);
}

.cart-order-number span {
    color: var(--color-success);
    font-size: 0.75rem;
}

.cart-order-number strong {
    color: var(--color-text-primary);
    font-size: 1rem;
    letter-spacing: 0.04em;
}

.cart-success-panel .cart-primary-btn {
    width: 100%;
}

.cart-toast-container {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 2200;
}

.cart-toast-container .toast-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    max-width: min(380px, calc(100vw - 1.5rem));
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    background: var(--color-card);
    box-shadow: var(--shadow-md);
    color: var(--color-text-primary);
    font-size: 0.82rem;
}

.cart-toast-container .toast-item.toast-success {
    border-left: 3px solid var(--color-success);
}

.cart-toast-container .toast-item.toast-error {
    border-left: 3px solid var(--color-danger);
}

.cart-toast-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    background: var(--color-success-bg);
    color: var(--color-success);
    font-size: 0.8rem;
    font-weight: 800;
}

.toast-error .cart-toast-icon {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.cart-add-modal {
    position: fixed;
    inset: 0;
    z-index: 2100;
    display: none;
    align-items: center;
    justify-content: center;
}

.cart-add-modal.is-visible {
    display: flex;
}

.cart-add-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(16, 24, 40, 0.45);
}

.cart-add-modal-dialog {
    position: relative;
    width: 370px;
    max-width: calc(100vw - 2rem);
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
    padding: 1.2rem 1.3rem 1.1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.8rem;
    background: var(--color-card);
    box-shadow: var(--shadow-lg);
}

.cart-add-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
}

.cart-add-modal-header h2 {
    margin: 0;
    color: var(--color-text-primary);
    font-size: 1.05rem;
    font-weight: 800;
}

.cart-add-modal-product-name {
    max-width: 285px;
    margin-top: 0.25rem;
    overflow: hidden;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cart-add-modal-hint {
    margin: 0.85rem 0 0.65rem;
    color: var(--color-text-secondary);
    font-size: 0.78rem;
}

.cart-add-modal-options {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.cart-modal-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.55rem;
    padding: 0.6rem 0.65rem;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    background: var(--color-bg-section);
}

.cart-modal-row--kaifen {
    border-color: var(--color-warning-border);
    background: var(--color-warning-bg);
}

.cart-modal-row--zidong {
    border-color: var(--color-success-border);
    background: var(--color-success-bg);
}

.cart-modal-row--shunyi {
    border-color: var(--color-brand);
    background: var(--color-brand-light);
}

.cart-modal-row--kaifen .cart-modal-row-label,
.cart-modal-row--kaifen .modal-qty-val {
    color: var(--color-warning);
}

.cart-modal-row--zidong .cart-modal-row-label,
.cart-modal-row--zidong .modal-qty-val {
    color: var(--color-success);
}

.cart-modal-row--shunyi .cart-modal-row-label,
.cart-modal-row--shunyi .modal-qty-val {
    color: var(--color-brand-hover);
}

.cart-modal-row--kaifen .modal-qty-btn {
    border-color: var(--color-warning-border);
    color: var(--color-warning);
}

.cart-modal-row--zidong .modal-qty-btn {
    border-color: var(--color-success-border);
    color: var(--color-success);
}

.cart-modal-row--shunyi .modal-qty-btn {
    border-color: var(--color-brand);
    color: var(--color-brand-hover);
}

.cart-modal-row--kaifen .modal-qty-btn:hover,
.cart-modal-row--kaifen .modal-qty-btn:focus-visible {
    border-color: var(--color-warning);
    background: var(--color-warning);
    color: #fff;
}

.cart-modal-row--zidong .modal-qty-btn:hover,
.cart-modal-row--zidong .modal-qty-btn:focus-visible {
    border-color: var(--color-success);
    background: var(--color-success);
    color: #fff;
}

.cart-modal-row--shunyi .modal-qty-btn:hover,
.cart-modal-row--shunyi .modal-qty-btn:focus-visible {
    border-color: var(--color-brand-hover);
    background: var(--color-brand-hover);
    color: #fff;
}

.cart-modal-row-label {
    flex: 1;
    color: var(--color-text-primary);
    font-size: 0.84rem;
    font-weight: 750;
}

.cart-modal-qty-control {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.modal-qty-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.8rem;
    height: 1.8rem;
    padding: 0;
    border: 1px solid var(--color-brand);
    border-radius: 0.4rem;
    background: var(--color-card);
    color: var(--color-brand-hover);
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
}

.modal-qty-btn:hover,
.modal-qty-btn:focus-visible {
    background: var(--color-brand-hover);
    color: #fff;
}

.modal-qty-val {
    min-width: 1.45rem;
    color: var(--color-text-primary);
    font-size: 0.86rem;
    font-weight: 800;
    text-align: center;
}

.cart-add-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.55rem;
    margin-top: 1.1rem;
}

.cart-add-modal-actions .cart-primary-btn,
.cart-add-modal-actions .cart-secondary-btn {
    width: auto;
    min-width: 6.3rem;
}

body.cart-is-open {
    overflow: hidden;
}

@media (min-width: 601px) {
    #mainContainer.cart-open,
    #mainHeader.cart-open {
        margin-right: var(--cart-panel-width) !important;
    }

    .cart-sidebar.open ~ #mainContainer {
        margin-right: var(--cart-panel-width);
    }

    .cart-backdrop.is-visible {
        display: none;
    }

    .cart-toggle-tab.is-open {
        right: var(--cart-panel-width);
        border-radius: 0 0.7rem 0.7rem 0;
    }
}

@media (max-width: 600px) {
    .cart-toggle-tab {
        min-width: 52px;
        padding: 0.7rem 0.5rem;
    }

    .cart-sidebar {
        width: 100vw;
        max-width: 100vw;
    }

    .cart-sidebar-header {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .cart-stepper,
    .cart-panel-heading,
    .cart-item-list,
    .cart-step-footer,
    .cart-checkout-form {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .cart-contact-summary {
        margin-left: 1rem;
        margin-right: 1rem;
    }

    .cart-toast-container {
        right: 0.75rem;
        bottom: 0.75rem;
        left: 0.75rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .cart-toggle-tab,
    .cart-sidebar,
    .cart-primary-btn,
    .cart-secondary-btn {
        transition: none;
    }
}