/* ============================================================
 * COMMON
 * ============================================================ */
.title-main h2 {
  position: relative;
  display: inline-block;
  font-size: 1.875rem;
  font-weight: 700;
}

.title-main h2 span {
  position: absolute;
  right: -14px;
  bottom: 7px;
  width: 7px;
  height: 7px;
  background-color: #002a71;
  border-radius: 50%;
}

.title-main div {
  text-transform: uppercase;
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.5;
}

.title-main p {
  font-size: 1.3rem;
  font-weight: 500;
  color: #666666;
}

.title-main a {
  display: inline-flex;
  align-items: end;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 500;
  color: #666666;
}

.title-main a svg {
  width: 70px;
  padding-bottom: 4px;
}

/* ============================================================
 * hero__slide 메인 슬라이드 영역
 * ============================================================ */
.hero-slide {
  width: 100%;
}

.hero-slide .swiper-slide {
  width: 100%;
  height: 100vh;
}

.hero-slide__bg {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-slide__bg img,
.hero-slide__bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 6s;
}

.hero-slide__text {
  height: 100%;
  color: #ffffff;
  line-height: 1.2;
}

.hero-slide__text .inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: end;
  padding-bottom: 150px;
}

.hero-slide__text .txt1 {
  font-size: 4.375rem;
  font-weight: 800;
}

.hero-slide__text .txt2 {
  font-size: 5rem;
  font-weight: 900;

  /* 글자 그라데이션: 민트 → 블루 → 민트 (반복해야 이음새 없이 순환) */
  background: linear-gradient(90deg, #00ffd8, #0a57ed, #00ffd8);
  background-size: 200% auto;
  /* 글자보다 2배 넓게 깔아 흐를 공간 확보 */
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  /* 구형 브라우저 폴백 */

  /* 그라데이션 흐름 애니메이션 */
  animation: txt2-wave 4s ease-in-out infinite alternate;
}

@keyframes txt2-wave {
  0% {
    background-position: 0% center;
  }

  100% {
    background-position: 200% center;
  }
}

.hero-slide__text .txt3 {
  font-size: 1.375rem;
  margin-top: 20px;
}

/* HERO TEXT SLIDE-IN ANIMATION
  ─────────────────────────────────────────── */
.hero-slide__text .txt1,
.hero-slide__text .txt2,
.hero-slide__text .txt3 {
  opacity: 0;
  transform: translateY(70px);
  transition: opacity 1.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1.6s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity;
}

/* 순차 딜레이 */
.hero-slide__text .txt2 {
  transition-delay: 0.3s;
}

.hero-slide__text .txt3 {
  transition-delay: 0.6s;
}

/* 활성 슬라이드 */
.swiper-slide-active .hero-slide__text .txt1,
.swiper-slide-active .hero-slide__text .txt2,
.swiper-slide-active .hero-slide__text .txt3 {
  opacity: 1;
  transform: translateX(0);
}

@media screen and (max-width: 1440px) {
  .hero-slide__text .inner {
    transform: translateY(-80px);
  }

  .hero__slide__h2 {
    font-size: 2.75rem;
  }

  .hero__slide__h2 span {
    font-size: 3.4rem;
  }

  .hero__slide .pagewrap {
    bottom: 100px;
  }
}

/* [2] Laptop (1280px) */
@media screen and (max-width: 1280px) {
  .hero-slide__text .inner {
    transform: translateY(-60px);
  }

  .hero__slide__txt,
  .hero__slide__p {
    font-size: 1.25rem;
  }

  .hero__slide__h2 {
    font-size: 2.4rem;
  }

  .hero__slide__h2 span {
    font-size: 3rem;
  }

  .hero .swiper-pagination-bullet .bar {
    width: 80px;
  }

  .hero__slide .swiper-pagination {
    left: 30px;
  }
}

/* [3] Tablet Landscape (1024px) */
@media screen and (max-width: 1024px) {
  .hero-slide__text .inner {
    transform: translateY(-40px);
  }

  .hero__slide__txt,
  .hero__slide__p {
    font-size: 1.125rem;
  }

  .hero__slide__h2 {
    font-size: 2.1rem;
  }

  .hero__slide__h2 span {
    font-size: 2.6rem;
  }

  .hero .swiper-pagination-bullet .bar {
    width: 60px;
  }

  .hero__slide .pagewrap {
    bottom: 80px;
  }
}

/* [4] Tablet Portrait (768px) */
@media screen and (max-width: 768px) {
  .hero__slide .swiper-slide {
    height: 90svh;
    background-color: #000;
  }

  /* 모바일 주소창 대응 */
  .hero-slide__text .inner {
    transform: translateY(0);
    padding: 0 20px;
  }

  /* 이미지가 밖으로 벗어나지 않도록 이동 거리를 50px -> 20px 정도로 조절 */
  .hero-slide__bg .hero-slide__bg__2 {
    transform: scale(1.2) translateX(26px);
  }

  .swiper-slide-active .hero-slide__bg .hero-slide__bg__2 {
    transform: scale(1.2) translateX(-26px);
  }

  .hero__slide__txt {
    font-size: 1rem;
    margin-bottom: 12px;
  }

  .hero__slide__h2 {
    font-size: 1.75rem;
  }

  .hero__slide__h2 span {
    font-size: 2.2rem;
  }

  .hero__slide__p {
    font-size: 1rem;
    line-height: 1.5;
  }

  .hero__slide .pagewrap {
    bottom: 60px;
  }

  .hero .swiper-pagination-bullet .bar {
    width: 40px;
  }

  .hero__slide .scroll {
    display: none;
  }

  /* 애니메이션 이동 거리 최적화 */
  .hero__slide__txt,
  .hero__slide__h2,
  .hero__slide__p {
    transform: translateX(40px);
    /* 화면 폭에 맞춰 이동 거리 단축 */
  }
}

/* [5] Mobile (480px) */
@media screen and (max-width: 480px) {
  .hero__slide .swiper-slide {
    height: 80svh;
  }

  .hero__slide__txt,
  .hero__slide__p {
    font-size: 0.95rem;
  }

  .hero__slide__h2 {
    font-size: 1.5rem;
  }

  .hero__slide__h2 span {
    font-size: 1.9rem;
  }

  .hero__slide .pagewrap {
    bottom: 50px;
  }

  .hero .swiper-pagination {
    left: 20px;
  }

  .hero .swiper-pagination-bullet .num {
    font-size: 0.9rem;
  }

  /* 텍스트 겹침 방지를 위한 행간 조절 */
  .hero__slide__h2 {
    line-height: 1.2;
  }
}

/* ============================================================
 * Section - intro PRIONE Technology & Materials
 * ============================================================ */
.intro-pin {
  height: calc(100vh - 65px + 600px);
}

.intro {
  position: sticky;
  top: 65px;
  height: calc(100vh - 65px);
  overflow: hidden;
  color: #ffffff;
  background-color: #000000;
}

.intro article {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-repeat: no-repeat;
  transition: clip-path 0.8s ease;
}

.technology {
  background-image: url(/assets/img/main/intro-bg-technology.jpg);
  background-position: left center;
  clip-path: inset(0 50% 0 0);
  z-index: 2;
}

.materials {
  background-image: url(/assets/img/main/intro-bg-materials.jpg);
  background-position: right center;
  clip-path: inset(0 0 0 50%);
  z-index: 1;
}

.intro.tech-active .technology {
  clip-path: inset(0 0 0 0);
  z-index: 2;
}

.intro.tech-active .materials {
  clip-path: inset(0 0 0 100%);
}

.intro.mat-active .materials {
  clip-path: inset(0 0 0 0);
  z-index: 2;
}

.intro.mat-active .technology {
  clip-path: inset(0 100% 0 0);
  z-index: 1;
}

/* ---- 1뎁스: 더보기 박스 ---- */
.intro-box {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  transition: opacity 0.5s ease;
  z-index: 4;
  width: 100%;
}

.technology .intro-box {
  left: 25%;
}

.materials .intro-box {
  left: 75%;
}

.intro-box__title {
  font-size: 3.75rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.intro-box__desc {
  font-size: 1.375rem;
  margin-bottom: 40px;
}

.intro-more {
  font-size: 1.25rem;
  font-weight: 500;
  background: transparent;
  padding: 12px 40px;
  border: 1px solid #fff;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.intro-more:hover {
  background: rgba(255, 255, 255, 0.3);
}

.intro.tech-active .intro-box,
.intro.mat-active .intro-box {
  opacity: 0;
  pointer-events: none;
}

/* ---- 2~4뎁스: 레이어 스택 ---- */
.panel-inner {
  position: absolute;
  inset: 0;
  z-index: 3;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

/* 패널이 열렸을 때만 안쪽 뎁스 노출 */
.intro.tech-active .technology .panel-inner,
.intro.mat-active .materials .panel-inner {
  opacity: 1;
  pointer-events: auto;
}

.depth {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.depth.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

/* technology 2 depth
  ─────────────────────────────────────────── */
.technology .tech-list {
  display: flex;
}

.technology .tech-list li {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  cursor: pointer;

  border-right: 1px solid rgba(255, 255, 255, 0);

  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);

  transition: backdrop-filter 0.6s ease, -webkit-backdrop-filter 0.6s ease,
    background-color 0.4s ease, border-color 0.6s ease 0.8s;
}

.intro.tech-active .technology .tech-list li {
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-right-color: rgba(255, 255, 255, 0.5);
}

.technology .tech-list li:last-child {
  border-right: none;
}

.intro.tech-active .technology .tech-list li:hover {
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  background-color: transparent;
}

.technology .tech-list li div {
  font-size: 3.25rem;
  font-weight: 800;
}

.technology .tech-list li p {
  font-size: 1.75rem;
  font-weight: 300;
}

/* technology 3 depth common
  ─────────────────────────────────────────── */
.depth-3-wrap {
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  height: 100%;
}

.depth-3-title {
  min-height: 150px;
  padding-top: 120px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: 4px;
  line-height: 1;
}

.depth-3-title div {
  font-size: 3.75rem;
  font-weight: 800;
}

.depth-3-title p {
  font-size: 1.5rem;
}

.depth-3-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* technology 3 depth - PLP
  ─────────────────────────────────────────── */
.tech-plp-list-wrap {
  position: relative;
}

.tech-plp-list-bg {
  pointer-events: none;
  position: absolute;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1000px;
}

.tech-plp-list-bg img {
  width: 100%;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

/* PLP 패널이 활성화(보일)될 때마다 이미지 등장 애니메이션 */
.depth-3-wrap.is-active .tech-plp-list-bg img {
  opacity: 1;
  transform: scale(1);
}

.tech-plp-list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.tech-plp-list li {
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 250px;
  min-height: 90px;
  font-size: 1.25rem;
  line-height: 1.2;
  text-align: center;
  transition: background-color .3s;
}

.tech-plp-list li:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

/* technology 3 depth - Battery
  ─────────────────────────────────────────── */
.tech-bat-list-wrap {
  max-width: 900px;
  gap: 20px;
  margin-top: -50px;
}

.tech-bat-list-img img {
  width: 100%;
}

.tech-bat-list {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-bat-list li {
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 250px;
  min-height: 90px;
  font-size: 1.25rem;
  line-height: 1.2;
  text-align: center;
  transition: background-color .3s;
}

.tech-bat-list li:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

/* technology 3 depth - TMI
  ─────────────────────────────────────────── */
.tech-tmi-list-wrap {
  max-width: 1200px;
  gap: 50px;
  margin-top: -50px;
}

.tech-tmi-list-img img {
  width: 100%;
}

.tech-tmi-list {
  max-width: 1000px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tech-tmi-list li {
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-width: 250px;
  min-height: 90px;
  font-size: 1.25rem;
  line-height: 1.2;
  text-align: center;
  transition: background-color .3s;
}

.tech-tmi-list li:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.tech-tmi-list li span {
  font-size: 1.125rem;
  font-weight: 300;
}

/* technology 4 depth - Title common
  ─────────────────────────────────────────── */
.depth-in-last {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.depth-in-tit {
  min-height: 200px;
  padding-top: 100px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: 26px;
}

.depth-mini {}

.depth-title {
  font-size: 3rem;
  font-weight: 600;
}

.depth-desc {
  font-size: 1.2rem;
}

.depth-in-content {
  flex: 1;
  width: 100%;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

/* technology 4 depth - PLP - detail
  ─────────────────────────────────────────── */
.tech-plp-plasma {
  text-align: center;
}

.tech-plp-plasma img {
  max-width: 1500px;
  width: 100%;
}

.tech-plp-config {
  text-align: center;
  margin-top: -300px;
  pointer-events: none;
}

.tech-plp-config img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tech-plp-synth {
  display: flex;
  justify-content: center;
  align-items: center;
}

.tech-plp-synth ul {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding-bottom: 200px;
}

.tech-plp-synth ul li {
  padding: 20px;
  border-radius: 20px;
  border: 1px solid #fff;
  font-size: 1.125rem;
  line-height: 1.5;
  text-align: center;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.tech-plp-platform {
  max-width: 1100px;
  margin: 50px auto;
}

.tech-plp-platform img {
  width: 100%;
}

.depth-menu,
.depth-opts {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.depth-menu li {
  padding: 40px 60px;
  border-radius: 20px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  transition: background 0.3s ease;
}

.materials .depth-menu li {
  background: rgba(0, 0, 0, 0.06);
}

.depth-menu li:hover {
  background: rgba(255, 255, 255, 0.25);
}

.depth-menu li b {
  font-size: 2rem;
}

.depth-menu li span {
  font-size: 1rem;
  opacity: 0.8;
}

.depth-opts li {
  padding: 14px 30px;
  border: 1px solid currentColor;
  border-radius: 40px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.depth-opts li:hover {
  background: currentColor;
}

.materials .depth-opts li:hover {
  color: #fff;
}

.technology .depth-opts li:hover {
  color: #000;
}

/* ---- Materials 루트 메뉴 (화살표 배너) ---- */
.mat-menu {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  /* 가로 가운데 정렬 */
  gap: 38px;
  height: 100%;
  padding: 0 8vw;
  color: #fff;
}

.mat-row__label {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

/* 화살표 배너 (오른쪽 뾰족) — 기본: 흰 배경 + 파란 글씨 */
.mat-arrow {
  display: flex;
  align-items: center;
  min-height: 60px;
  width: 1000px;
  max-width: 100%;
  /* 가로 길이 제한 */
  background-color: #ffffff;
  /* 화살표(→): 두꺼운 몸통(16~84%) + 통통한 삼각형 화살촉(50px) */
  clip-path: polygon(0 16%,
      calc(100% - 50px) 16%,
      calc(100% - 50px) 0,
      100% 50%,
      calc(100% - 50px) 100%,
      calc(100% - 50px) 84%,
      0 84%);
  padding-right: 80px;
  transition: background-color 0.25s;
}

.mat-arrow li {
  flex: 1;
  padding-left: 30px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #002a71;
  /* 기본: 파란 글씨 */
  cursor: pointer;
  transition: color 0.2s;
}

/* 마우스오버 → 파란 화살표 + (호버 항목) 초록 글씨 */
.mat-arrow:hover {
  background-color: #002a71;
}

.mat-arrow:hover li {
  color: #ffffff;
}

.mat-arrow li:hover {
  color: #00d6a0;
}

/* 화살표 밖 설명 텍스트 (불릿, 열 정렬을 화살표와 맞춤) */
.mat-desc {
  display: flex;
  margin-top: -4px;
  width: 1000px;
  max-width: 100%;
  padding-right: 80px;
}

.mat-desc li {
  flex: 1;
  padding-left: 30px;
  font-size: 1rem;
  line-height: 1.6;
  color: #d5dbe6;
}

.mat-desc li span {
  display: block;
}

.mat-desc li span::before {
  content: "• ";
}

/* 3뎁스 준비중 placeholder — 화면 가운데 */
.depth-ready {
  display: flex;
  align-items: center;
  justify-content: center;
}

.depth-ready p {
  font-size: 1.5rem;
  color: #ffffff;
}

/* 3뎁스 상세 (내용 있는 항목) */
.mat-detail {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.mat-detail__inner {
  display: flex;
  align-items: center;
  gap: 60px;
  width: 100%;
  max-width: 1100px;
  padding: 0 8vw;
}

.mat-detail__text {
  flex: 1;
}

.mat-detail__text h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.mat-detail__text h3 span {
  display: block;
  margin-top: 6px;
  font-size: 1.25rem;
  font-weight: 400;
  color: #00d6a0;
}

.mat-detail__text p {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.mat-detail__spec {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mat-detail__spec li {
  font-size: 1rem;
  color: #cfd6e0;
}

.mat-detail__spec li b {
  color: #ffffff;
  font-weight: 700;
}

.mat-detail__note {
  margin-top: 16px;
  font-size: 0.9rem;
  color: #9aa4b2;
}

.mat-detail__img {
  flex: 0 0 38%;
}

.mat-detail__img img {
  width: 100%;
}

/* ---- 뒤로/닫기 꺽쇠 ---- */
.intro-back {
  position: absolute;
  left: 130px;
  top: 100px;
  width: 56px;
  height: 56px;
  cursor: pointer;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.intro.tech-active .intro-back,
.intro.mat-active .intro-back {
  opacity: 1;
  pointer-events: auto;
}

.intro-back:hover {
  transform: translateX(-10px);
}

.intro-back::before {
  content: "";
  position: absolute;
  left: 52%;
  top: 50%;
  width: 14px;
  height: 14px;
  border-left: 3px solid #fff;
  border-bottom: 3px solid #fff;
  transform: translate(-50%, -50%) rotate(45deg);
}

/* ============================================================
 * Section - value Sustainable Energy Innovation
 * ============================================================ */
.value {
  padding: 150px 0;
  display: flex;
  justify-content: space-between;
  gap: 40px;
}

.value .title-main {
  width: 30%;
  padding-left: calc((100% - 1600px) / 2 + 50px);
}

.value .title-main h2 {
  margin-bottom: 20px;
}

.value .title-main div {
  margin-bottom: 6px;
}

.value .title-main a {
  margin-top: 60px;
}

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

/* HERO TEXT SLIDE-IN ANIMATION
  ─────────────────────────────────────────── */
.value-slide {
  width: 100%;
  height: 100%;
  flex-shrink: 0;
}

.value-slide .swiper-slide {
  width: 100%;
  height: 100%;
}

.value-slide__bg {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  border-radius: 38px;
  overflow: hidden;
}

.value-slide__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.value-slide__text {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: end;
  padding: 50px;
  color: #ffffff;
}

.value-slide__text .txt1 {
  font-size: 2.375rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.value-slide__text .txt2 {
  font-size: 1.4rem;
  font-weight: 500;
}

/* ============================================================
 * Section - energy FROM SEAWATER TO ENERGY
 * ============================================================ */
.energy {
  position: relative;
  color: #fff;
}

.energy-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 6s;
}

.energy .inner {
  position: absolute;
  top: 100px;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.energy .title-main p {
  color: #ffffff;
  font-size: 1.5rem;
}

.energy .content {
  margin: 0 auto;
  max-width: 1300px;
  width: 100%;
  border-radius: 10px;
  border: 1px solid #fff;
}

.energy-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  counter-reset: energy;
}

.energy-list li {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-weight: 300;
  padding: 30px 0 24px;
  counter-increment: energy;
}

.energy-list li span {
  font-size: 1.5rem;
  font-weight: 600;
}

.energy-list li::before {
  content: counter(energy, decimal-leading-zero);
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.875rem;
  font-weight: 900;
  border-radius: 50%;
  background-color: #fff;
  color: #383ac8;
  width: 28px;
  height: 28px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ============================================================
 * Section - business ADVANCED ENERGY SOLUTIONS
 * ============================================================ */
.business {
  padding: 200px 0 140px;
  background-color: #f5f5f5;
  background-image: url(/assets/img/main/business-bg.jpg);
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.business .inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
}

.business .title-main {
  width: 25%;
}

.business .title-main h2 {
  margin-bottom: 20px;
}

.business .title-main div {
  margin-bottom: 6px;
}

.business .title-main a {
  margin-top: 60px;
}

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

.business-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.business-list li {
  width: 48%;
}

.business-list li:nth-child(even) {
  align-self: flex-end;
}

.business-list li:not(:first-child) {
  margin-top: -160px;
}

.business-list li img {
  width: 100%;
  border-radius: 30px;
}

.business-list li div {
  padding-left: 20px;
  margin-top: 30px;
  font-size: 1.3rem;
  color: #666666;
}

.business-list li div span {
  display: block;
  margin-bottom: 10px;
  font-size: 2.25rem;
  font-weight: 800;
  color: #000000;
}

/* ============================================================
 * Section - product
 * ============================================================ */
.product {
  padding: 150px 0 300px;
  position: relative;
}

.product .title-main {
  text-align: center;
  margin-bottom: 100px;
}

.product .title-main h2 {
  margin-bottom: 26px;
}

.product .title-main div {
  font-weight: 700;
}

/* Product Card
  ─────────────────────────────────────────── */
.product .content {
  display: flex;
  gap: 26px;
}

.product-card {
  flex: 1 1 0;
  height: 700px;
  transition: 0.8s;
  position: relative;
  overflow: hidden;
  border-radius: 40px;
  background: linear-gradient(180deg, #fff -10%, #fff 55%, #cccccc 120%);
  border: 1px solid #fff;
}

.product-card.active {
  flex: 3 1 0;
  background: #fff;
  border-color: #03274e;
  box-shadow: 0 0 20px rgba(33, 40, 112, 0.7);
}

.product-photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-photo img {
  width: 64rem;
  max-width: none;
  height: auto;
  max-height: 700px;
  object-fit: contain;
  transform-origin: center;
  transition: transform 0.8s ease, opacity 0.6s ease;
}

/* 비활성/활성 이미지 크기 위치 */
.product-card:not(.active) .product-photo .sib {
  transform: translateX(-10px) scale(0.65);
}

.product-card.active .product-photo .sib {
  transform: translateX(0) scale(0.9);
}

.product-card:not(.active) .product-photo .lib {
  transform: translateX(0) scale(0.7);
}

.product-card.active .product-photo .lib {
  transform: translateX(0) translateY(-20px) scale(0.85);
}

.product-card:not(.active) .product-photo .pouch {
  transform: translateX(120px) scale(0.85);
}

.product-card.active .product-photo .pouch {
  transform: translateX(0) translateY(-50px) scale(0.8);
}

.product-tag {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  text-align: center;
  padding: 50px 0;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.product-tag dt {
  font-size: 1.625rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.product-tag dd {
  font-size: 1.25rem;
  font-weight: 500;
  color: #999999;
}

.product-tag .plus {
  position: absolute;
  left: 50%;
  bottom: 50px;
  transform: translateX(-50%);
  font-size: 2.25rem;
  font-weight: 300;
  color: #999999;
}

.product-card.active .product-tag {
  opacity: 0;
  visibility: hidden;
}

.product-detail {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0;
  visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 60px;
  transition: opacity 0.3s ease, visibility 0.3s;
}

/* 카드가 다 펼쳐진(.45s) 뒤 '제자리'에서 페이드인 */
.product-card.active .product-detail {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.45s ease 0.45s, visibility 0s linear 0.45s;
}

.product-txt {
  position: relative;
  white-space: nowrap;
}

.product-txt .tit {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.product-txt .desc {
  font-size: 1.6rem;
  font-weight: 400;
}

/* Product Marquee Effect
  ─────────────────────────────────────────── */
.product-marquee {
  position: absolute;
  bottom: 50px;
  left: 0;
  width: 100%;
  overflow: hidden;
  /* 넘치는 글자 숨김 */
  font-size: 9rem;
  font-weight: 900;
  line-height: 1;
  color: #f3f3f3;
}

.product-marquee__track {
  display: flex;
  width: max-content;
  /* 내용 전체 너비만큼 */
  animation: product-marquee 120s linear infinite;
  will-change: transform;
}

.product-marquee__track span {
  padding-right: 60px;
  /* 문구 사이 간격(각 span 균일 → 이음새 없음) */
  white-space: nowrap;
}

/* 절반(-50%)만큼 흘러가면 복제 문구가 딱 이어져 무한 반복 */
@keyframes product-marquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

/* 움직임 최소화 설정 사용자 배려 */
@media (prefers-reduced-motion: reduce) {
  .product-marquee__track {
    animation: none;
  }
}

/* ============================================================
 * Section - patents Patents & projects
 * ============================================================ */
.patents {
  padding: 100px 0;
}

.patents .title-main {
  position: relative;
  margin-bottom: 70px;
}

.patents .title-main h2 {
  margin-bottom: 26px;
}

.patents .title-main div {
  margin-bottom: 6px;
  font-weight: 700;
}

.patents .title-main a {
  position: absolute;
  bottom: 0;
  right: 0;
}

.patents .content {
  background: url(/assets/img/main/patents-bg.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  border-radius: 40px;
  overflow: hidden;
  color: #ffffff;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  height: 500px;
}

.patents-box {
  border-right: 1px solid #fff;
  padding: 50px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.patents-box:last-child {
  border-right: none;
}

.patents-box img {
  width: 100px;
}

.patents-box h3 {
  font-size: 1.8rem;
  font-weight: 700;
}

.patents-box div {
  margin-top: auto;
  align-self: end;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background-color: rgba(0, 44, 54, 0.65);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  line-height: 1;
  transition: all 0.2s;
}

.patents-box:hover div {
  transform: scale(1.1);
}

.patents-box div span {
  font-size: 2rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.patents-box div span b {
  font-size: 4rem;
  font-weight: 700;
}

/* ============================================================
 * Section - support PRIONE Support
 * ============================================================ */
.support {
  background-color: #f5f8fc;
  padding: 100px 0;
}

.support .title-main {
  text-align: center;
  margin-bottom: 70px;
}

.support .title-main h2 {
  margin-bottom: 26px;
}

.support .title-main div {
  font-weight: 700;
}

.support-img {
  text-align: center;
}

.support-card {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  margin-top: -40px;
  display: grid;
  grid-template-columns: 0.55fr 0.55fr 0.9fr;
  gap: 20px;
}

.support-card li {
  color: #fff;
  border-radius: 20px;
  padding: 30px;
}

.support-card .careers {
  background-color: #002143;
}

.support-card .contact {
  background-color: #003989;
}

.support-card .catalog {
  background-color: rgba(87, 87, 87, 0.85);
}

.support-card .long {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.support-card .short,
.support-card .short a {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.support-card .short h3 {
  font-size: 1.875rem;
  font-weight: 700;
}

.support-card .short p {
  font-size: 1.25rem;
}

.support-card .short img {
  width: 80px;
  margin-top: auto;
  align-self: end;
}

.support-card .down {
  display: flex;
  gap: 16px;
}

.support-card .down a {
  flex: 1;
  height: 170px;
  border: 1px solid #fff;
  border-radius: 5px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 300;
  transition: all 0.3s;
}

.support-card .down a:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.support-card .down a img {
  width: 20px;
}