:root {
        --yellow: #FDE45D;
        --dark-blue: #102E6C;
        --cream: #FFFDF8;
        --cream2: rgb(246 242 231);
        --orange: #c2410a;
    }

    * {
        box-sizing: border-box;
    }

    body {
        margin: 0;
        font-family: Arial, "Microsoft JhengHei", sans-serif;
        background: var(--cream);
        color: #1f2937;
    }

    .page {
        max-width: 1440px;
        margin: 0 auto;
        padding: 24px;
    }

    .header {
        margin-bottom: 20px;
    }

    .header h1 {
        margin: 0 0 8px;
        font-size: 30px;
    }

    .header p {
        margin: 0;
        color: #6b7280;
        line-height: 1.7;
    }

    .header-logo-link {
        color: inherit;
        text-decoration: none;
        transition: opacity 0.28s;
    }

    .header-logo-link:hover {
        opacity: 0.6;
    }

    .steps {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 20px;
    }

    .step-dot {
        padding: 10px 14px;
        border-radius: 999px;
        background: #e5e7eb;
        color: #4b5563;
        font-size: 14px;
        font-weight: bold;
        cursor: pointer;
        user-select: none;
    }

    .step-dot.active {
        background: var(--dark-blue);
        color: #fff;
    }

    /*.step-dot.done {
            background: #dcfce7;
            color: #166534;
        }*/
    .step-dot.done {
        background: #102e6c;
        color: #FFF;
        opacity: 0.5;
    }

    .layout {
        display: flex;
        gap: 24px;
        align-items: flex-start;
    }

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

    .sidebar {
        width: 380px;
        flex: 0 0 380px;
    }

    .sticky-box {
        position: sticky;
        top: 20px;
    }

    .card {
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
        overflow: hidden;
        margin-bottom: 20px;
    }

    .card-head {
        background: var(--yellow);
        padding: 18px 22px;
        font-size: 20px;
        font-weight: bold;
    }

    .card-body {
        padding: 20px 22px;
    }

    .step-panel {
        display: none;
    }

    .step-panel.active {
        display: block;
    }

    .section-title {
        margin: 0 0 8px;
        font-size: 26px;
    }

    .section-desc {
        margin-bottom: 18px;
        color: #6b7280;
        line-height: 1.8;
    }

    .option-list {
        display: flex;
        /*flex-direction: column;*/
        flex-wrap: wrap;
        gap: 14px;
        width: 100%;
    }

    .option-list.group {
        margin-bottom: 10px;
    }

    .option-item {
        border: 1px solid #dbe3ec;
        border-radius: 14px;
        background: #fff;
        transition: 0.2s ease;
        flex: 1 1 49%;
    }

    .option-item:empty {
        border: 0px;
    }

    .w100 {
        flex: 1 1 100%;
    }

    .option-item.checked {
        /*border-color: #2563eb;*/
        border-color: #bcbcbc;
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
        /*background: #f8fbff;*/
        background: var(--cream2);
    }

    .option-item.readonly {
        background: #f3f4f6;
        border-color: #e5e7eb;
    }

    .option-item.readonly .option-price {
        color: #374151;
    }

    .option-item.readonly .js-qty-select {
        background: #e5e7eb;
    }

    .option-item.readonly input[type="checkbox"] {
        cursor: not-allowed;
    }

    .option-item.readonly .option-title::after {
        content: "（固定項目）";
        font-size: 12px;
        margin-left: 6px;
        color: #6b7280;
    }

    .option-body {
        display: flex;
        gap: 14px;
        padding: 16px;
    }

    .check-col {
        flex: 0 0 auto;
        padding-top: 2px;
    }

    .check-col input[type="checkbox"],
    .check-col input[type="radio"] {
        width: 20px;
        height: 20px;
        cursor: pointer;
        accent-color: #274C86;
    }

    .content-col {
        flex: 1;
        min-width: 0;
    }

    .option-top {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        align-items: flex-start;
        margin-bottom: 8px;
    }

    .option-title {
        font-size: 18px;
        font-weight: bold;
    }

    .option-price {
        font-size: 18px;
        font-weight: bold;
        color: #c2410c;
        white-space: nowrap;
    }

    .option-meta {
        font-size: 14px;
        color: #6b7280;
        margin-bottom: 8px;
        line-height: 1.7;
    }

    .option-desc {
        font-size: 14px;
        line-height: 1.8;
        color: #374151;
    }

    .badge {
        display: inline-block;
        padding: 4px 8px;
        border-radius: 999px;
        background: #eef4ff;
        color: #2563eb;
        font-size: 12px;
        font-weight: bold;
        margin-right: 6px;
    }

    .qty-wrap {
        margin-top: 14px;
        padding: 12px;
        background: #f7f9fc;
        border-radius: 10px;
    }

    .qty-head {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 8px;
        font-size: 14px;
        color: #4b5563;
    }

    .qty-value {
        font-weight: bold;
        color: #2563eb;
        font-size: 18px;
    }

    .js-qty-select {
        width: 100%;
        height: 42px;
        border: 1px solid #cfd8e3;
        border-radius: 8px;
        background: #fff;
        padding: 0 12px;
        font-size: 15px;
    }

    .js-qty-select:disabled {
        background: #eef2f6;
        color: #9ca3af;
        cursor: not-allowed;
    }

    .item-subtotal {
        margin-top: 10px;
        font-size: 14px;
        font-weight: bold;
        color: #c2410c;
    }

    .note-block {
        padding: 14px 16px;
        border: 1px dashed #d1d5db;
        border-radius: 12px;
        background: #fafafa;
        color: #6b7280;
        line-height: 1.8;
        margin-top: 10px;
        font-size: 14px;
    }

    .note-block.mt-0 {
        margin-top: 0px;
    }

    .nav-btns {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        margin-top: 24px;
    }

    .btn {
        border: 0;
        border-radius: 10px;
        padding: 12px 18px;
        font-size: 15px;
        font-weight: bold;
        cursor: pointer;
    }

    .btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    .btn-prev {
        background: #e5e7eb;
        color: #111827;
        transition: opacity 0.28s;
    }

    .btn-next {
        /*background: #2563eb;*/
        background: var(--dark-blue);
        color: #fff;
        transition: opacity 0.28s;
    }

    .btn-submit {
        background: var(--dark-blue);
        color: #fff;
        transition: opacity 0.28s;
    }

    .btn-prev:hover,
    .btn-next:hover,
    .btn-submit:hover {
        opacity: 0.8;
    }

    .summary-block {
        margin-bottom: 18px;
        padding-bottom: 18px;
        border-bottom: 1px solid #eef2f7;
    }

    .summary-block:last-child {
        margin-bottom: 0;
        padding-bottom: 0;
        border-bottom: 0;
    }

    .summary-title {
        font-size: 15px;
        color: #6b7280;
        margin-bottom: 8px;
    }

    .summary-money {
        font-size: 28px;
        font-weight: bold;
        color: var(--orange);
    }

    .summary-money.monthly {
        color: var(--orange);
        font-size: 24px;
    }

    .summary-note {
        color: #9ca3af;
        font-size: 13px;
        line-height: 1.7;
        margin-top: 6px;
    }

    .quote-item {
        padding: 12px 0;
        border-bottom: 1px solid #eef2f7;
    }

    .quote-item:last-child {
        border-bottom: 0;
        padding-bottom: 0;
    }

    .quote-name {
        font-size: 14px;
        font-weight: bold;
        margin-bottom: 4px;
    }

    .quote-sub {
        font-size: 13px;
        color: #6b7280;
        line-height: 1.7;
        margin-bottom: 4px;
    }

    .quote-price {
        font-size: 14px;
        font-weight: bold;
    }

    .empty-text {
        color: #9ca3af;
        font-size: 14px;
        line-height: 1.8;
    }

    .final-box {
        background: #f8fbff;
        border: 1px solid #dbeafe;
        border-radius: 12px;
        padding: 16px;
        margin-top: 12px;
    }

    .final-title {
        font-size: 18px;
        font-weight: bold;
        margin-bottom: 12px;
    }

    .table-like {
        width: 100%;
        border-collapse: collapse;
    }

    .table-like-row {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        padding: 10px 0;
        border-bottom: 1px solid #e5edf5;
    }

    .table-like-row:last-child {
        border-bottom: 0;
    }

    .table-left {
        flex: 1;
        min-width: 0;
    }

    .table-right {
        flex: 0 0 auto;
        font-weight: bold;
        white-space: nowrap;
    }


    del.gray {
        color: #AAA;
    }

    .d-none {
        display: none;
    }

    @media (max-width: 1100px) {
        .layout {
            flex-direction: column;
        }

        .sidebar {
            width: 100%;
            flex: 1 1 auto;
        }

        .sticky-box {
            position: static;
        }
    }

    /* Accordion groups */
    .step-panel[data-step="2"] .option-list.group {
        display: block;
        width: 100%;
        border: 1px solid #dbe3ec;
        border-radius: 14px;
        background: #fff;
        overflow: hidden;
        margin-bottom: 16px;
    }

    .step-panel[data-step="2"] .option-list.group>.group-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        margin: 0;
        padding: 16px 18px;
        background: #f8fbff;
        border-bottom: 1px solid #e8eef5;
        font-size: 18px;
        font-weight: 700;
        color: #1f2937;
        cursor: pointer;
        user-select: none;
    }

    .step-panel[data-step="2"] .option-list.group>.group-head::after {
        content: '+';
        margin-left: 12px;
        color: #2563eb;
        font-size: 24px;
        font-weight: 700;
        line-height: 1;
        transition: transform 0.2s ease;
    }

    .step-panel[data-step="2"] .option-list.group.is-open>.group-head::after {
        transform: rotate(45deg);
    }

    .step-panel[data-step="2"] .option-list.group>.option-list {
        padding: 16px;
    }

    .step-panel[data-step="2"] .option-list.group>.note-block {
        margin: 0 16px 16px;
    }

    .step-panel[data-step="2"] .option-list.group>.group-head:focus-visible {
        outline: 3px solid rgba(37, 99, 235, 0.25);
        outline-offset: -3px;
    }

    .alert-icon {
        display: inline-flex;
        vertical-align: middle;
        transform: rotate(-15deg);
        margin-right: 10px;
        color: var(--orange);
    }

    /* 基礎方案的列表 */
    .service-block {
        flex: 1 1 200px;
    }

    section.service-content {
        display: flex;
        flex-wrap: wrap;
    }

    .service-block h3 {
        margin-top: 10px;
        margin-bottom: 5px;
    }

    .service-block ul {
        padding-left: 1em;
        margin-top: 0px;
    }

    .site-footer {
        text-align: center;
        margin-top: 16px;
        margin-bottom: 16px;
        line-height: 1.5em;
        font-size: 0.8em;
    }

    .site-footer a {
        color: var(--dark-blue);
        transition: opacity 0.28s;
    }

    .site-footer a:hover {
        opacity: 0.6;
    }

    a.floating-btn {
        position: fixed;
        bottom: 20px;
        left: 30px;
        background: #ff6a00;
        color: #fff;
        padding: 12px 18px;
        border-radius: 30px;
        text-decoration: none;
        font-size: 14px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        z-index: 9999;
        transition: 0.3s;
    }