/* 색상 변수 */
:root {
  --products-primary-color: #0066cc;
  --products-secondary-color: #ffd700;
  --products-accent-color: #00b4d8;
  --products-text-dark: #1f2937;
  --products-text-gray: #6b7280;
  --products-text-light: #9ca3af;
  --products-bg-light: #f8fafc;
  --products-border-color: #e5e7eb;
  --products-bg-gray: #f8f9fa;
  --products-border-gray: #cbd5e1;

  /* 그림자 변수 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-button: 0 8px 25px rgba(0, 102, 204, 0.3);
  --shadow-button-hover: 0 12px 30px rgba(0, 102, 204, 0.4);

  /* 테두리 반경 변수 */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

/* 이미지 최적화 */
img {
    max-width: 100%;
    height: auto;
}

/* GPU 가속을 위한 transform 사용 */
.product-nav .nav-item,
.url-button {
    will-change: transform;
    transform: translateZ(0);
}

.image-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 메인 제목 스타일 */
.main-title {
    text-align: center;
    margin-top: 3.5rem;
    margin-bottom: 3rem;
}

.main-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--products-text-dark);
    margin-bottom: 1rem;
}

.main-title p {
    font-size: 1.25rem;
    color: var(--products-text-gray);
    margin-bottom: 1rem;
}

.main-underline {
    width: 2.5rem;
    height: 0.25rem;
    background: linear-gradient(to right, var(--products-primary-color), var(--products-accent-color));
    margin: 0 auto;
}

/* 섹션 제목 스타일 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h3 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--products-text-dark);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--products-text-gray);
    margin-bottom: 1rem;
}

.section-title .underline {
    width: 2.5rem;
    height: 0.25rem;
    background: linear-gradient(to right, #3b82f6, #06b6d4);
    margin: 0 auto;
}

/* 공통 유틸리티 클래스 */
.section-spacing {
  margin-bottom: 5rem;
}

@media screen and (max-width: 640px) {
  .section-title {
    margin-bottom: 1.5rem;
  }
}

/* 바이오가스 전용 스타일 */
.introduction-container.biogas {
  display: block !important;
  flex-direction: column !important;
}

/* ECU 전용 스타일 */
.introduction-container.ecu {
  display: block !important;
  flex-direction: column !important;
}

/* ECU 특징 스타일 - 엔진 ECU 페이지에서만 적용 */
.introduction-container.ecu .description-text {
  width: 95%;
  margin: 0 auto;
}

.introduction-container.ecu .description-text h3 {
  margin-bottom: 1.5rem;
}

.introduction-container.ecu .features-list {
  margin: 1rem 0.8rem 0 0.8rem;
  padding-left: 0;
  list-style: none;
}

.introduction-container.ecu .features-list li {
  color: var(--products-text-dark);
  line-height: 1.6;
  margin-bottom: 0.8rem;
  padding-left: 1.3rem;
  position: relative;
  font-size: 1.1rem;
}

.introduction-container.ecu .features-list li::before {
  content: "●";
  color: #000;
  position: absolute;
  left: 0;
  top: 0.4rem;
  font-size: 0.6rem;
}

@media (max-width: 900px) {
  .introduction-container.ecu .features-list {
    margin-left: 0.3rem;
    margin-right: 0.3rem;
  }
}

@media screen and (max-width: 640px) {
    .introduction-container.ecu .description-text {
      width: 100%;
      margin: 0 auto;
    }
}

/* ECU 실린더 선택 영역 */
.specifications-container .cylinder-selector {
  margin-bottom: 2rem;
}

.specifications-container .cylinder-selector__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.specifications-container .cylinder-selector__list .cylinder-card {
  flex: 1 1 200px;
  min-height: 120px;
  background: rgba(248, 250, 252, 0.85);
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.28);
  padding: 1.4rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
  position: relative;
  cursor: default;
  text-align: left;
  font: inherit;
  color: var(--products-text-dark);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

.specifications-container .cylinder-selector__list .cylinder-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid rgba(0, 102, 204, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--products-primary-color);
}

.specifications-container .cylinder-selector__list .cylinder-card__glyph {
  width: 26px;
  height: 26px;
  display: block;
}

.specifications-container .cylinder-selector__list .cylinder-card__count {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  flex: 1;
}
.specifications-container .cylinder-selector__detail {
  margin-top: 2rem;
  background: #fff;
  /* border: 1px solid var(--products-border-color); */
  border-radius: var(--radius-sm);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
}

.specifications-container .cylinder-selector__detail .cylinder-selector__summary {
  margin-bottom: 1.75rem;
}

.specifications-container .cylinder-selector__detail .cylinder-selector__summary h4 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--products-text-dark);
}

.specifications-container .cylinder-selector__detail .cylinder-selector__summary p {
  margin: 0;
  color: var(--products-text-gray);
  font-size: 1.02rem;
  line-height: 1.6;
}

.specifications-container .cylinder-selector__detail .spec-card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.specifications-container .cylinder-selector__detail .spec-card {
  background: #fff;
  border: 1px solid var(--products-border-color);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
  box-shadow: none;
  display: flex;
  flex-direction: column;
}

@media (max-width: 768px) {
  .specifications-container .cylinder-selector__detail .spec-card {
      min-height: auto;
  }
}

@media (min-width: 1024px) {
  .specifications-container .cylinder-selector__detail .spec-card-grid {
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 1.75rem;
  }

  .specifications-container .cylinder-selector__detail .spec-card--tech {
      grid-column: 1 / span 2;
      grid-row: 1;
  }

  .specifications-container .cylinder-selector__detail .spec-card--electrical {
      grid-column: 3 / span 2;
      grid-row: 1;
  }

  .specifications-container .cylinder-selector__detail .spec-card--communications {
      grid-column: 5 / span 2;
      grid-row: 1;
  }

  .specifications-container .cylinder-selector__detail .spec-card--inputs {
      grid-column: 1 / span 3;
      grid-row: 2;
  }

  .specifications-container .cylinder-selector__detail .spec-card--outputs {
      grid-column: 4 / span 3;
      grid-row: 2;
  }
}

.specifications-container .cylinder-selector__detail .spec-card h5 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  color: var(--products-primary-color);
  font-weight: 600;
}

.specifications-container .cylinder-selector__detail .spec-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.specifications-container .cylinder-selector__detail .spec-card__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--products-text-dark);
  margin-bottom: 0.5rem;
}

.specifications-container .cylinder-selector__detail .spec-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--products-primary-color);
}

.specifications-container .cylinder-selector__detail .spec-card__list li:last-child {
  margin-bottom: 0;
}

/* 제품 소개 섹션 */
.section-introduction .introduction-container {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  background: var(--products-bg-light);
  border-left: 4px solid var(--products-primary-color);
  padding: 2rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.introduction-container .description-text h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--products-text-dark);
    margin-bottom: 1rem;
}

.introduction-container .description-text p {
    color: var(--products-text-dark);
    line-height: 1.6;
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.introduction-container .description-text p:last-child {
    margin-bottom: 0;
}

.introduction-container .description-text {
    flex: 1;
}

.introduction-container .description-images {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  justify-content: center;
}

.introduction-container .description-image {
    flex-shrink: 0;
    max-width: 250px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: linear-gradient(145deg, #ffffff, #f8fafc);
    border: 1px solid var(--products-border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    padding: 1rem;
}

.introduction-container .description-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

/* 반응형 디자인 - 모바일/태블릿에서는 세로 배치 (탑바와 동일한 900px 브레이크포인트) */
@media (max-width: 900px) {
    .section-introduction .introduction-container {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem;
    }

    .introduction-container .description-image {
        align-self: center;
    }

    .specifications-container .cylinder-selector__list {
        gap: 1rem;
    }

    .specifications-container .cylinder-selector__list .cylinder-card {
        flex: 1 1 100%;
        min-height: auto;
    }

    .specifications-container .cylinder-selector__detail {
        padding: 2rem 1.5rem;
    }

    .specifications-container .cylinder-selector__detail .spec-card {
        min-height: auto;
    }
}

@media (max-width: 640px) {
    .introduction-container .description-images {
        flex-direction: column;
        align-items: center;
    }

    .introduction-container .description-image {
        width: 100%;
    }

    .specifications-container .cylinder-selector__list .cylinder-card {
      padding: 0.7rem 1.6rem;
    }
}

/* 공급범위 섹션 - 심플 텍스트 */
.section-supply-scope {
    margin-bottom: 5rem;
}

.section-supply-scope .supply-scope-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.supply-scope-container .content {
    background: none;
    border: none;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}

.supply-scope-container .list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 0;
    padding-left: 0 !important;
}

.supply-scope-container .item {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    color: #374151;
    font-weight: 500;
    background: var(--products-bg-light);
    border: 1px solid var(--products-border-color);
    border-radius: var(--radius-sm);
    display: inline-block;
    cursor: default;
    font-family: inherit;
}

.supply-scope-container .note {
    background: none;
    border: none;
    padding: 0;
    margin-top: 1.5rem;
}

.supply-scope-container .note p {
    margin: 0;
    color: #6b7280;
    font-size: 1.1rem;
    font-style: italic;
    text-align: center;
}

/* 공급범위 섹션 반응형 디자인 */
@media (max-width: 768px) {
    .supply-scope-container .list {
        gap: 0.75rem;
    }

    .supply-scope-container .item {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* 옵션 섹션 - 기본 스타일 */
.section-options {
    margin-bottom: 5rem;
}

.section-options .options-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.options-container .options-content {
    background: none;
    border: none;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.options-container .options-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin: 0;
}

/* 공통 기본 스타일 - 모든 option-item에 적용 */
.options-container .option-item {
    font-size: 1.1rem;
    position: relative;
}

.options-container .option-item::before {
    content: "✓";
    position: absolute;
    color: #10b981;
    font-weight: bold;
    font-size: 1.2rem;
}

/* 기본 옵션 전용 스타일 - 박스 디자인 적용 */
.options-container .options-content .option-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.9rem;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    color: var(--products-text-dark);
    line-height: 1.4;
    font-weight: 500;
    padding-left: 2.6rem;
}

.options-container .options-content .option-item::before {
    left: 1.0rem;
}

/* 그리드 옵션 컨테이너 - 베리에이션 형태 */
.options-container.grid-layout {
    display: flex;
    gap: 0;
    margin-top: 2rem;
}

.options-container.grid-layout .option-group {
    flex: 1;
    background: white;
    padding: 1.5rem;
    position: relative;
}

.options-container.grid-layout .option-group:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 5rem;
    bottom: 1rem;
    width: 1px;
    background: repeating-linear-gradient(
        to bottom,
        #d1d5db 0px,
        #d1d5db 4px,
        transparent 4px,
        transparent 8px
    );
}

.options-container.grid-layout .option-group .option-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--products-primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
    position: relative;
    padding: 1rem 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-bottom: 1px solid var(--products-accent-color);
    display: inline-block;
    width: 100%;
}

.options-container.grid-layout .option-group .option-title::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--products-primary-color);
    transition: width 0.5s ease;
}

.options-container.grid-layout .option-group .option-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--products-accent-color);
    transition: all 0.3s ease;
}

.options-container.grid-layout .option-group .option-title:hover::before {
    width: 100%;
}

.options-container.grid-layout .option-group .option-title:hover::after {
    border-top-color: var(--products-primary-color);
}

.options-container.grid-layout .option-group .option-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

/* 그리드 옵션 전용 스타일 */
.options-container.grid-layout .option-group .option-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.9rem;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    color: var(--products-text-dark);
    line-height: 1.4;
    font-weight: 500;
    padding-left: 2.5rem;
}

.options-container.grid-layout .option-group .option-item::before {
    left: 0.8rem;
}

/* 옵션 섹션 반응형 디자인 - 통합 */
@media (max-width: 768px) {
    /* 공통 기본 반응형 */
    .options-container .option-item {
        font-size: 1rem;
    }

    /* 기본 옵션 반응형 */
    .options-container .options-content .option-item {
        padding: 0.8rem;
        padding-left: 2.4rem;
    }

    /* 그리드 옵션 반응형 */
    .options-container.grid-layout {
        flex-direction: column;
    }

    .options-container.grid-layout .option-group:not(:last-child)::after {
        right: 1rem;
        left: 1rem;
        top: auto;
        bottom: 0;
        width: auto;
        height: 1px;
    }

    .options-container.grid-layout .option-group {
        padding: 1rem;
    }

    .options-container.grid-layout .option-group .option-title {
        font-size: 1.2rem;
    }

    .options-container.grid-layout .option-group .option-item {
        font-size: 1rem;
    }
}



/* 이미지 자리표시자 스타일 */
.image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: #9ca3af;
}

.placeholder-icon {
    font-size: 1.5rem;
    margin-right: 0.5rem;
    line-height: 1;
}

.placeholder-text {
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .image-placeholder {
        height: 150px;
    }

    .placeholder-icon {
        font-size: 1.25rem;
    }

    .placeholder-text {
        font-size: 0.8rem;
    }
}

/* 사양 정보 스타일 */
.specifications-container .spec-info--card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1), var(--shadow-xl);
    overflow: hidden;
    padding: 2rem;
    opacity: 0;
    animation: fadeInInfo 0.6s ease-out forwards;
    margin-bottom: 3.5rem;
}

/* Foundation 그리드 강제 적용 */
.specifications-container .spec-info--card .row {
    margin: 0;
    display: flex;
    flex-wrap: wrap;
}

/* 좌측 제품사양 */
.specifications-container .spec-info--card .large-7 {
    width: 58.33333% !important;
    flex: 0 0 58.33333%;
    padding: 0 30px 0 15px;
    box-sizing: border-box;
}

/* 우측 제품이미지 수직중앙정렬 */
.specifications-container .spec-info--card .large-5 {
    width: 41.66667% !important;
    flex: 0 0 41.66667%;
    padding: 0 15px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 모바일 & 태블릿 반응형 - small-12 클래스 지원 (탑바와 동일한 900px 브레이크포인트) */
@media (max-width: 900px) {
    .specifications-container .spec-info--card {
        padding-top: 1.5rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .specifications-container .spec-info--card .small-12 {
        width: 100% !important;
        flex: 0 0 100%;
    }

    .specifications-container .spec-info--card .small-12.large-7 {
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
        margin-bottom: 1.5rem;
    }

    .specifications-container .spec-info--card .small-12.large-5 {
        display: flex;
        align-items: center;
        justify-content: center;
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
    }

    .specifications-container .spec-info--card .image-container {
        width: 100%;
    }
}

@keyframes fadeInInfo {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.specifications-container .spec-info--card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--products-text-dark);
    margin-bottom: 1rem;
}

/* 사양 테이블 스타일 */
.specifications-container .spec-info--card .spec-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    row-gap: 0.5rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--products-border-color);
    line-height: 1.6;
}

.specifications-container .spec-info--card .spec-label {
    font-weight: 600;
    color: var(--products-text-gray);
    min-width: 120px;
    flex-shrink: 0;
}

.specifications-container .spec-info--card .spec-label::before {
    content: "•";
    color: var(--products-primary-color);
    margin-right: 0.5rem;
    font-weight: bold;
}

.specifications-container .spec-info--card .spec-value {
    color: var(--products-text-dark);
    text-align: right;
    word-break: break-word;
    line-height: 1.4;
    flex: 1 1 auto;
    min-width: 0;
}

/* Fuel 항목의 라인 높이 조정 */
.specifications-container .spec-info--card .spec-value {
    line-height: 1.4;
}

/* Fuel 항목의 줄간격 조정 - 직접적인 방법 */
.specifications-container .spec-info--card .spec-row .spec-value {
    line-height: 1.4;
}

/* Fuel 항목에 특별한 클래스 추가를 위한 스타일 */
.specifications-container .spec-info--card .spec-value[data-fuel="true"] {
    line-height: 2;
    padding: 0.3em 0;
}

/* 제품 프레임 스타일 */
.specifications-container .spec-info--card .product-frame {
    width: 320px;
    height: 320px;
    background: linear-gradient(145deg, #f8fafc, #e2e8f0);
    border: 1px solid var(--products-border-gray);
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    padding: 16px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.specifications-container .spec-info--card .product-frame img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}


/* 사양 테이블 전용 스타일 */
.specifications-container .spec-info--table {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  margin-bottom: 2rem;
}

/* 반응형 테이블 래퍼 */
.specifications-container .spec-info--table .spec-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 테이블 기본 스타일 */
.specifications-container .spec-info--table .spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 0;
}

.specifications-container .spec-info--table .spec-table thead {
  background: linear-gradient(135deg, var(--products-primary-color) 0%, #0052a3 100%);
}

.specifications-container .spec-info--table .spec-table thead th {
  padding: 1rem;
  text-align: center;
  white-space: nowrap;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  vertical-align: middle;
  color: white;
  background: transparent;
}

.specifications-container .spec-info--table .spec-table thead tr.header-group {
  background: transparent;
}

.specifications-container .spec-info--table .spec-table thead tr.header-group th {
  padding: 0.8rem 1rem;
  font-size: 0.95rem !important;
  font-weight: 700 !important;
  background: transparent;
}

.specifications-container .spec-info--table .spec-table thead tr.header-sub {
  background: transparent;
}

.specifications-container .spec-info--table .spec-table thead tr.header-sub th {
  padding: 0.8rem 0.5rem;
  font-size: 0.95rem !important;
  font-weight: 700 !important;
  line-height: 1.3;
  background: transparent;
  border-right: 1px solid rgba(255, 255, 255, 0.2) !important;
}

.specifications-container .spec-info--table .spec-table thead tr.header-group th:last-child {
  border-right: none;
}

.specifications-container .spec-info--table .spec-table thead tr:last-child th {
  border-bottom: none;
}

.specifications-container .spec-info--table .spec-table tbody tr {
  border-bottom: 1px solid var(--products-border-color);
  transition: background-color 0.2s ease;
}

.specifications-container .spec-info--table .spec-table tbody tr:hover {
  background-color: var(--products-bg-light);
}

.specifications-container .spec-info--table .spec-table tbody tr:nth-child(even) {
  background-color: #fafbfc;
}

.specifications-container .spec-info--table .spec-table tbody tr:nth-child(even):hover {
  background-color: var(--products-bg-light);
}

.specifications-container .spec-info--table .spec-table td {
  padding: 1rem;
  color: var(--products-text-dark);
  border-right: 1px solid var(--products-border-color);
  text-align: center;
  vertical-align: middle;
}

.specifications-container .spec-info--table .spec-table td:last-child {
  border-right: none;
}

.specifications-container .spec-info--table .spec-table td:first-child {
  font-weight: 600;
  color: var(--products-primary-color);
  white-space: nowrap;
}

/* 모바일 반응형 테이블 - 카드 스타일로 전환 */
@media (max-width: 900px) {
    .specifications-container .spec-info--table {
      box-shadow: none;
      margin-bottom: 1rem;
    }

    .specifications-container .spec-info--table table {
        border: 0 !important;
    }

    .specifications-container .spec-info--table .spec-table thead {
        display: none;
    }

    .specifications-container .spec-info--table .spec-table tbody tr {
        display: block;
        margin-bottom: 2rem;
        border: 1px solid var(--products-border-color);
        border-radius: var(--radius-sm);
        overflow: hidden;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);
    }

    .specifications-container .spec-info--table .spec-table tbody tr:nth-child(even) {
        background-color: white;
    }

    .specifications-container .spec-info--table .spec-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1rem;
        border-right: none;
        border-bottom: 1px solid var(--products-border-color);
        text-align: right;
    }

    .specifications-container .spec-info--table .spec-table td:last-child {
        border-bottom: none;
    }

    .specifications-container .spec-info--table .spec-table td:first-child {
        background: linear-gradient(135deg, var(--products-primary-color) 0%, #0052a3 100%);
        color: white;
        font-weight: 700;
        font-size: 1.1rem;
        justify-content: center;
        padding: 1rem;
    }

    .specifications-container .spec-info--table .spec-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--products-text-gray);
        text-align: left;
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 0.025em;
    }

    .specifications-container .spec-info--table .spec-table td:first-child::before {
        display: none;
    }
}

@media (max-width: 480px) {
    .specifications-container .spec-info--table .spec-table td {
        padding: 0.6rem 0.75rem;
        font-size: 0.9rem;
    }

    .specifications-container .spec-info--table .spec-table td::before {
        font-size: 0.8rem;
    }

    .specifications-container .spec-info--table .spec-table td:first-child {
        font-size: 1rem;
    }
}

/* 적용분야 그리드 */
.applications-container {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 900px) {
    .applications-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .applications-container {
        grid-template-columns: repeat(1, 1fr);
    }
}

/* 적용분야 리스트 스타일 */
.applications-container.list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.applications-container.list .list-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.applications-container.list .list-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--products-bg-light);
    border-radius: 50%;
}

.applications-container.list .list-icon span {
    font-size: 2rem;
}

.applications-container.list .list-content {
    flex: 1;
}

.applications-container.list .list-content p {
    margin: 0;
    color: var(--products-text-dark);
    font-size: 1.125rem;
    line-height: 1.6;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .applications-container.list {
        grid-template-columns: 1fr;
    }

    .applications-container.list .list-item {
        padding: 1rem;
        gap: 1rem;
    }

    .applications-container.list .list-icon {
        width: 50px;
        height: 50px;
    }

    .applications-container.list .list-icon span {
        font-size: 1.75rem;
    }

    .applications-container.list .list-content p {
        font-size: 1rem;
    }
}

/* 카드 스타일 */
.applications-container .card {
    background: white;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.applications-container .card .card-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    height: 180px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(200deg, #f8fafc, #e2e8f0);
}

/* 카드 이미지 높이 반응형 - 254:180 비율 유지 */
@media (max-width: 900px) {
    .applications-container .card .card-container {
        height: auto;
        aspect-ratio: 254 / 180;
    }
}

@media (max-width: 640px) {
    .applications-container .card .card-container {
        height: auto;
        aspect-ratio: 254 / 180;
    }
}

/* 카드 아이콘 스타일 */
.applications-container .card .card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.applications-container .card .card-icon span {
    font-size: 3.5rem;
    color: var(--products-text-gray);
}

/* 카드 이미지 스타일 */
.applications-container .card .card-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.applications-container .card .card-content {
    padding: 1rem;
    text-align: center;
}

.applications-container .card .card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--products-text-dark);
    margin: 0 0 0.5rem 0;
}

.applications-container .card .card-subtitle {
    font-size: 0.875rem;
    color: var(--products-text-gray);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.applications-container .card .card-description {
    font-size: 0.875rem;
    color: var(--products-text-light);
    margin-bottom: 0;
    line-height: 1.4;
}

/* 시스템 통합 섹션 스타일 */

/* 반응형 개선 */
@media (max-width: 640px) {

    .main-title h2 {
        font-size: 2rem;
    }

    .main-title p {
        font-size: 1.125rem;
    }
}


/* 네비게이션 메뉴 스타일 - 드라이 + 미묘한 디자인 */
.product-nav {
    background: transparent;
    padding: 0;
    margin-bottom: 6rem;
    border-bottom: 1px solid #e5e7eb;
}

.product-nav .nav-menu {
    display: flex;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.product-nav .nav-item {
    background: transparent;
    padding: 1.25rem 2.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 1rem;
    font-weight: 400;
    color: #6b7280;
    text-align: center;
    position: relative;
}

.product-nav .nav-item:hover {
    color: #374151;
    background: rgba(0, 102, 204, 0.02);
}

.product-nav .nav-item.active {
    color: var(--products-primary-color);
    border-bottom-color: var(--products-primary-color);
    font-weight: 500;
    background: rgba(0, 102, 204, 0.03);
}

.product-nav .nav-item::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--products-primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.product-nav .nav-item.active::before {
    width: 30%;
}

/* 콘텐츠 섹션 스타일 */
.content-section {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    margin-bottom: 3rem;
}

.content-section.active {
    display: block;
    opacity: 1;
}

/* 반응형 디자인 - 900px 브레이크포인트 */
@media (max-width: 900px) {
    .product-nav .nav-menu {
        flex-direction: column;
        gap: 0;
    }

    .product-nav .nav-item {
        padding: 1rem 1.5rem;
        border-bottom: 1px solid #e5e7eb;
        border-right: none;
    }

    .product-nav .nav-item:last-child {
        border-bottom: none;
    }

    .product-nav .nav-item.active {
        border-bottom: 1px solid #e5e7eb;
    }
}

/* 새로운 엔진 섹션 스타일 */
.section-hyundai-engines {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-top: 5rem;
}

.section-hyundai-engines .hyundai-engine-container {
    flex: 1;
    background-color: var(--products-bg-gray);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hyundai-engine-container .description-content {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.hyundai-engine-container .description-text {
    flex: 1;
}

.hyundai-engine-container h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.hyundai-engine-container .description-text p {
    margin-bottom: 1rem;
    text-align: justify;
}

.hyundai-engine-container .description-image {
    flex: 0 0 150px;
    height: 150px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.15);
    padding: 5px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hyundai-engine-container .description-image img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
}

.hyundai-engine-container .url-button {
    margin-top: 1rem;
}

.hyundai-engine-container .url-button a {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--products-primary-color), var(--products-accent-color));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-button);
    border: none;
    cursor: pointer;
}

.hyundai-engine-container .url-button a:hover {
    background: linear-gradient(135deg, var(--products-primary-color), var(--products-accent-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-button-hover);
    color: white;
    text-decoration: none;
}

/* 현대자동차 엔진 섹션 반응형 - 900px 브레이크포인트 */
@media (max-width: 900px) {
    .section-hyundai-engines {
        flex-direction: column;
        gap: 1.5rem;
        margin-top: 3rem;
    }

    .section-hyundai-engines .hyundai-engine-container {
        padding: 1.5rem;
    }

    .hyundai-engine-container .description-content {
        flex-direction: column;
        gap: 1rem;
    }

    .hyundai-engine-container .description-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 300px;
        height: auto;
        align-self: center;
    }

    .hyundai-engine-container h3 {
        font-size: 1.3rem;
        text-align: center;
    }

    .hyundai-engine-container .url-button {
        text-align: center;
        margin-top: 2rem;
    }
}



/* 공통 스타일 */
.product-image-contain {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.centered-text {
    text-align: center;
}

/* 시스템 통합 컨테이너 */
.section-system-integration .system-integration-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.system-integration-container .box {
    background: white;
    border: 1px solid #e2e8f0;
    padding: 1.5rem;
    border-radius: 0;
    position: relative;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.system-integration-container .box.corner-left::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    border-right: 15px solid transparent;
    border-top: 15px solid #e2e8f0;
}

.system-integration-container .box.corner-right::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-top: 15px solid #e2e8f0;
}

.system-integration-container .box h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--products-primary-color);
    margin-bottom: 1rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.system-integration-container .box-image {
    width: 100%;
    height: 300px;
    border-radius: 0;
    overflow: hidden;
    background: transparent;
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 1rem;
}

.system-integration-container .box-image.cd-overview {
  height: 500px !important;
  border: 0;
}

.system-integration-container .box-image.ed-overview {
  height: 700px !important;
  border: 0;
}

.system-integration-container .box-image.md-overview {
  height: 400px !important;
  border: 0;
}

.system-integration-container .box-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

.system-integration-container .box-description {
    text-align: center;
    background: #f8fafc;
    color: var(--products-text-dark);
    padding: 1rem;
    border-radius: 0;
    position: relative;
    border-left: 2px solid #e2e8f0;
    margin-top: 1rem;
}

.system-integration-container .box-description::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid #f8fafc;
}

.system-integration-container .box-description p {
    color: var(--products-text-dark);
    line-height: 1.6;
    font-size: 0.9rem;
    margin: 0;
    font-weight: 400;
    text-align: justify;
}

/* 컬럼 수별 모디파이어 클래스 */
.system-integration-container.cols-2 {
    grid-template-columns: 1fr 1fr;
}

.system-integration-container.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.system-integration-container.cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .system-integration-container.cols-2,
    .system-integration-container.cols-3,
    .system-integration-container.cols-4 {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .system-integration-container .box-image {
        height: auto;
        padding: 0.5rem;
    }

    .system-integration-container .box-image.cd-overview,
    .system-integration-container .box-image.ed-overview,
    .system-integration-container .box-image.md-overview {
      height: auto !important;
      margin-top: 2rem;
    }
}

@media (max-width: 1024px) {
    .system-integration-container.cols-3,
    .system-integration-container.cols-4 {
        grid-template-columns: 1fr 1fr;
    }
}

/* 플로팅 링크 아이콘 스타일 */
.body.field.clearfix {
    position: relative;

    /* 플로팅 버튼 설정 (JavaScript와 공유) */
    --floating-btn-size: 56px;
    --floating-btn-bottom: 80px;
    --floating-btn-right: 100px;
}

.floating-link-icon {
    /* position, top, bottom, right는 JavaScript에서 동적 제어 */
    width: var(--floating-btn-size);
    height: var(--floating-btn-size);
    background: linear-gradient(135deg, var(--products-primary-color), var(--products-accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
    /* transition은 hover 효과에만 적용 */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    z-index: 100;
    text-decoration: none;
}

.floating-link-icon:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
    color: white;
    text-decoration: none;
}

.floating-link-icon:active {
    transform: translateY(-1px) scale(0.98);
}

.floating-link-icon:focus {
    color: white;
}

.floating-link-icon svg {
    width: 28px;
    height: 28px;
}

/* 반응형 - 모바일에서 크기 축소 */
@media (max-width: 768px) {
    .body.field.clearfix {
        /* 모바일 플로팅 버튼 설정 */
        --floating-btn-size: 48px;
        --floating-btn-bottom: 60px;
        --floating-btn-right: 15px; /* 모바일에서는 여백이 작으므로 15px만 */
    }

    .floating-link-icon svg {
        width: 24px;
        height: 24px;
    }
}

/* 작은 모바일 (480px 이하) */
@media (max-width: 480px) {
    .body.field.clearfix {
        --floating-btn-size: 48px;
        --floating-btn-bottom: 50px;
        --floating-btn-right: 10px; /* 작은 화면에서는 더 작게 */
    }
}
.specifications-container .cylinder-selector__list .cylinder-card:hover,
.specifications-container .cylinder-selector__list .cylinder-card:focus,
.specifications-container .cylinder-selector__list .cylinder-card:active {
  outline: none;
}

#power-generation-packages .applications-container .card .card-image {
  object-fit: cover;
}