/* ── 페이지 레이아웃 ─────────────────────── */
      .calc-wrap {
        max-width: 680px;
        margin: 0 auto;
        padding: 0 16px 80px;
      }

      /* ── 히어로 배너 ─────────────────────────── */
      .btv-hero {
        background: #0052cc;
        padding: 56px 20px 40px;
        text-align: center;
        color: #fff;
      }
      .btv-hero-badge {
        display: inline-block;
        background: rgba(255, 255, 255, 0.18);
        border: 1px solid rgba(255, 255, 255, 0.4);
        border-radius: 20px;
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        padding: 8px 24px;
        margin-top: 16px;
        margin-bottom: 14px;
      }
      .btv-hero h1 {
        font-size: 1.85rem;
        font-weight: 900;
        line-height: 1.3;
        margin: 0 0 10px;
      }
      .btv-hero h1 span {
        color: #ffd700;
      }
      .btv-hero p {
        font-size: 0.92rem;
        opacity: 0.88;
        margin: 0;
      }

      /* ── 계산기 카드 공통 ─────────────────────── */
      .calc-step {
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 2px 16px rgba(0, 0, 0, 0.07);
        padding: 24px 20px;
        margin-top: 20px;
      }
      .calc-step-header {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 18px;
      }
      .step-num {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: #0052cc;
        color: #fff;
        font-size: 0.8rem;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
      }
      .step-title {
        font-size: 1rem;
        font-weight: 700;
        color: #111;
      }
      .step-sub {
        font-size: 0.8rem;
        color: #888;
        margin-top: 1px;
      }

      /* ── 라디오 카드 그리드 ──────────────────── */
      .rc-grid {
        display: grid;
        gap: 10px;
      }
      .rc-grid.col2 {
        grid-template-columns: 1fr 1fr;
      }
      .rc-grid.col3 {
        grid-template-columns: repeat(3, 1fr);
      }
      .rc-grid.col-auto {
        grid-template-columns: 1fr 1fr;
      }

      .rc-label {
        position: relative;
        cursor: pointer;
        display: block;
      }
      .rc-label input[type="radio"],
      .rc-label input[type="checkbox"] {
        position: absolute;
        opacity: 0;
        width: 0;
        height: 0;
      }
      .rc-card {
        border: 2px solid #e8ecf0;
        border-radius: 12px;
        padding: 14px 12px;
        text-align: center;
        transition:
          border-color 0.18s,
          background 0.18s,
          box-shadow 0.18s;
        background: #fafbfc;
        height: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
        position: relative;
      }
      .rc-label input:checked + .rc-card {
        border-color: #0052cc;
        background: #ebf2ff;
        box-shadow: 0 0 0 1px #0052cc;
      }
      .rc-card .check-badge {
        display: none;
        position: absolute;
        top: 8px;
        right: 8px;
        width: 20px;
        height: 20px;
        background: #0052cc;
        border-radius: 50%;
        color: #fff;
        font-size: 0.65rem;
        align-items: center;
        justify-content: center;
      }
      .rc-label input:checked + .rc-card .check-badge {
        display: flex;
      }
      .rc-card img {
        width: 60px;
        height: 60px;
        object-fit: contain;
        border-radius: 8px;
      }
      .rc-card .rc-name {
        font-size: 0.9rem;
        font-weight: 700;
        color: #111;
        line-height: 1.3;
      }
      .rc-card .rc-desc {
        font-size: 0.75rem;
        color: #666;
        line-height: 1.4;
      }
      .rc-card .rc-tag {
        display: inline-block;
        background: #f0f4ff;
        color: #0052cc;
        border-radius: 20px;
        font-size: 0.68rem;
        font-weight: 700;
        padding: 2px 8px;
      }
      .rc-label input:checked + .rc-card .rc-tag {
        background: #0052cc;
        color: #fff;
      }
      .rc-card .rc-price-add {
        font-size: 0.78rem;
        color: #0052cc;
        font-weight: 700;
      }
      .rc-card .rc-price-free {
        font-size: 0.78rem;
        color: #27ae60;
        font-weight: 700;
      }

      /* 체크박스 카드 (옵션) */
      .ck-grid {
        display: grid;
        gap: 10px;
        grid-template-columns: 1fr 1fr;
      }
      .ck-label {
        position: relative;
        cursor: pointer;
        display: block;
      }
      .ck-label input[type="checkbox"] {
        position: absolute;
        opacity: 0;
        width: 0;
        height: 0;
      }
      .ck-card {
        border: 2px solid #e8ecf0;
        border-radius: 12px;
        padding: 14px 12px;
        text-align: center;
        transition:
          border-color 0.18s,
          background 0.18s;
        background: #fafbfc;
        position: relative;
      }
      .ck-label input:checked + .ck-card {
        border-color: #0052cc;
        background: #ebf2ff;
      }
      .ck-card .ck-icon {
        font-size: 1.4rem;
        margin-bottom: 4px;
      }
      .ck-card .ck-name {
        font-size: 0.85rem;
        font-weight: 700;
        color: #111;
      }
      .ck-card .ck-desc {
        font-size: 0.72rem;
        color: #888;
        margin-top: 2px;
      }
      .ck-card .ck-chk {
        display: none;
        position: absolute;
        top: 8px;
        right: 8px;
        width: 20px;
        height: 20px;
        background: #0052cc;
        border-radius: 50%;
        color: #fff;
        font-size: 0.65rem;
        align-items: center;
        justify-content: center;
      }
      .ck-label input:checked + .ck-card .ck-chk {
        display: flex;
      }

      /* ── 휴대폰 결합 토글 스위치 ────────────────── */
      .toggle-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: #fafbfc;
        border: 2px solid #e8ecf0;
        border-radius: 12px;
        padding: 14px 16px;
        margin-top: 10px;
        cursor: pointer;
        transition: border-color 0.18s, background 0.18s;
      }
      .toggle-row:has(input:checked) {
        border-color: #0052cc;
        background: #ebf2ff;
      }
      .toggle-row-left {
        display: flex;
        align-items: center;
        gap: 12px;
      }
      .toggle-row-icon {
        font-size: 1.4rem;
        line-height: 1;
      }
      .toggle-row-name {
        font-size: 0.88rem;
        font-weight: 700;
        color: #111;
      }
      .toggle-row-desc {
        font-size: 0.75rem;
        color: #888;
        margin-top: 2px;
      }
      /* 스위치 컨테이너 */
      .toggle-switch {
        position: relative;
        width: 52px;
        height: 28px;
        flex-shrink: 0;
      }
      .toggle-switch input {
        opacity: 0;
        width: 0;
        height: 0;
        position: absolute;
      }
      .toggle-slider {
        position: absolute;
        inset: 0;
        background: #cdd4dc;
        border-radius: 28px;
        transition: background 0.22s;
        cursor: pointer;
      }
      .toggle-slider::before {
        content: '';
        position: absolute;
        width: 22px;
        height: 22px;
        left: 3px;
        top: 3px;
        background: #fff;
        border-radius: 50%;
        box-shadow: 0 1px 4px rgba(0,0,0,.18);
        transition: transform 0.22s;
      }
      .toggle-switch input:checked + .toggle-slider {
        background: #0052cc;
      }
      .toggle-switch input:checked + .toggle-slider::before {
        transform: translateX(24px);
      }

      /* ── 2대 설치 서브 선택 ──────────────────── */
      .second-tv-sub {
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        margin-top: 0;
        transition: max-height 0.3s ease, opacity 0.25s ease, margin-top 0.25s ease;
      }
      .second-tv-sub.open {
        max-height: 200px;
        opacity: 1;
        margin-top: 12px;
      }
      .second-tv-sub-label {
        font-size: 0.82rem;
        color: #555;
        font-weight: 600;
        margin-bottom: 10px;
        display: flex;
        align-items: center;
        gap: 6px;
      }
      .second-tv-sub-label::before {
        content: '└';
        color: #0052cc;
        font-size: 1rem;
      }

      /* ── 셋톱박스 단계 숨김 처리 ──────────────── */
      #step3 {
        display: none;
      }
      #step3.visible {
        display: block;
      }

      /* ── 결과 박스 ──────────────────────────── */
      .result-box {
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 4px 24px rgba(0, 82, 204, 0.14);
        border: 2px solid #0052cc;
        padding: 24px 20px;
        margin-top: 20px;
        transition: opacity 0.25s;
      }
      .result-box.empty {
        opacity: 0.45;
        pointer-events: none;
      }
      .result-top {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 16px;
        padding-bottom: 14px;
        border-bottom: 1px solid #eef2f8;
      }
      .result-icon {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: #0052cc;
        color: #fff;
        font-size: 0.9rem;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
      }
      .result-title {
        font-size: 1rem;
        font-weight: 700;
        color: #111;
      }
      .result-product {
        font-size: 0.78rem;
        color: #0052cc;
        margin-top: 1px;
      }

      .result-rows {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin-bottom: 18px;
      }
      .result-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 0.88rem;
      }
      .result-row .rr-label {
        color: #555;
        display: flex;
        align-items: center;
        gap: 6px;
      }
      .result-row .rr-label i {
        color: #0052cc;
        font-size: 0.8rem;
      }
      .result-row .rr-val {
        font-weight: 700;
        color: #111;
      }
      .result-row.discount .rr-val {
        color: #e74c3c;
      }
      .result-row.total-row {
        padding-top: 12px;
        border-top: 1px solid #e8ecf0;
        font-size: 0.95rem;
      }
      .result-row.total-row .rr-label {
        font-weight: 700;
        color: #111;
        font-size: 0.95rem;
      }
      .result-row.total-row .rr-val {
        font-size: 1.35rem;
        color: #0052cc;
        font-weight: 900;
      }
      .result-row.total-row .rr-val small {
        font-size: 0.75rem;
        font-weight: 400;
        color: #888;
        margin-left: 2px;
      }

      .result-gift {
        background: linear-gradient(90deg, #fff8e7 0%, #fffbef 100%);
        border: 1px solid #ffe082;
        border-radius: 10px;
        padding: 12px 14px;
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 18px;
      }
      .result-gift img {
        width: 36px;
        height: 36px;
        object-fit: contain;
      }
      .result-gift-body {
      }
      .result-gift-label {
        font-size: 0.75rem;
        color: #888;
      }
      .result-gift-val {
        font-size: 1.1rem;
        font-weight: 900;
        color: #c47f00;
      }
      .result-gift-val span {
        font-size: 0.75rem;
        font-weight: 400;
        color: #888;
        margin-left: 4px;
      }

      .result-btns {
        display: flex;
        gap: 8px;
      }
      .result-btn-main {
        flex: 1;
        background: #0052cc;
        color: #fff;
        border: none;
        border-radius: 10px;
        padding: 14px 10px;
        font-size: 0.9rem;
        font-weight: 700;
        cursor: pointer;
        text-decoration: none;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        transition: background 0.18s;
      }
      .result-btn-main:hover {
        background: #0040a0;
      }
      .result-btn-kakao {
        flex: 1;
        background: #fee500;
        color: #191919;
        border: none;
        border-radius: 10px;
        padding: 14px 10px;
        font-size: 0.9rem;
        font-weight: 700;
        cursor: pointer;
        text-decoration: none;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        transition: background 0.18s;
      }
      .result-btn-kakao:hover {
        background: #f4d800;
      }

      /* ── 안내 섹션 ──────────────────────────── */
      .info-sec {
        margin-top: 20px;
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        padding: 22px 20px;
      }
      .info-sec-title {
        font-size: 0.92rem;
        font-weight: 700;
        color: #333;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 6px;
      }
      .info-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 6px;
      }
      .info-list li {
        font-size: 0.78rem;
        color: #666;
        padding-left: 14px;
        position: relative;
        line-height: 1.6;
      }
      .info-list li::before {
        content: "·";
        position: absolute;
        left: 4px;
        color: #aaa;
      }

      /* ── 페이지 이동 버튼 ──────────────────── */
      .page-nav {
        display: flex;
        gap: 10px;
        margin-top: 20px;
      }
      .page-nav a {
        flex: 1;
        border: 2px solid #0052cc;
        color: #0052cc;
        border-radius: 10px;
        padding: 12px;
        text-align: center;
        font-size: 0.88rem;
        font-weight: 700;
        text-decoration: none;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        transition:
          background 0.18s,
          color 0.18s;
      }
      .page-nav a:hover {
        background: #0052cc;
        color: #fff;
      }

      /* ── 반응형 ─────────────────────────────── */
      @media (max-width: 480px) {
        .btv-hero h1 {
          font-size: 1.5rem;
        }
        .rc-grid.col3 {
          grid-template-columns: 1fr 1fr;
        }
        .ck-grid {
          grid-template-columns: 1fr;
        }
        .result-btns {
          flex-direction: column;
        }
        .page-nav {
          flex-direction: column;
        }
      }