:root {
  --product-soft-bg: #f5f5f5;
  --product-section-gap: 110px;
  --product-text: #3d3d3d;
  --product-card-shadow: 0 18px 42px rgba(37, 67, 120, 0.08);
}

.product-page {
  background: #ffffff;
}

.product-hero {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.72) 28%, rgba(255, 255, 255, 0.15) 54%, rgba(255, 255, 255, 0) 70%),
    url("../image/product/banner.png") center top / cover no-repeat;
}

.product-hero-inner {
  min-height: 650px;
  display: flex;
  align-items: center;
}

.product-hero-copy {
  padding-left: 64px;
}

.product-hero-copy h1 {
  margin: 0;
  color: var(--color-primary);
  font-size: 60px;
  line-height: 1.2;
  font-weight: 900;
}

.product-hero-copy p {
  margin: 22px 0 0;
  color: var(--color-primary);
  font-size: 32px;
  font-weight: 700;
}

.product-heading {
  margin-bottom: 54px;
}

.product-heading h2 {
  font-size: 44px;
}

.product-heading p {
  font-size: 22px;
}

.product-trust-section,
.product-promotion-section,
.product-operate-section,
.product-security-section {
  padding: var(--product-section-gap) 0;
}

.product-arc-section {
  padding: var(--product-section-gap) 0 120px;
  background: #f6f6f6;
}

.trust-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1.44fr) minmax(0, 1.02fr);
  gap: 0;
  overflow: hidden;
  box-shadow: var(--product-card-shadow);
  background: #ffffff;
}

.trust-card {
  min-height: 100%;
}

.trust-card-tall {
  height: 500px;
}

.trust-stack {
  display: grid;
  grid-template-rows: 230px 270px;
}

.trust-stack-bottom {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.trust-card-wide {
  height: 230px;
}

.trust-card-square {
  height: 270px;
}

.trust-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-arc-carousel {
  position: relative;
}

.arc-control {
  display: none;
}

.product-arc-stage {
  position: relative;
  min-height: 444px;
}

.product-arc-track {
  position: relative;
  width: min(980px, 100%);
  height: 392px;
  margin: 0 auto;
}

.product-arc-track::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 18px;
  width: min(806px, calc(100% - 62px));
  height: 328px;
  border: 13px solid rgba(255, 198, 128, 0.5);
  border-bottom: 0;
  border-radius: 418px 418px 0 0;
  transform: translateX(-50%);
}

.product-arc-track::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: min(1080px, calc(100% + 120px));
  height: 12px;
  transform: translateX(-50%);
}

.arc-node {
  position: absolute;
  width: 86px;
  height: 86px;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  transform: translate(-50%, -100%) scale(var(--node-scale, 1));
  transform-origin: center bottom;
  transition: transform 0.4s ease, filter 0.4s ease, opacity 0.4s ease;
  opacity: var(--node-opacity, 0.88);
  z-index: 1;
  overflow: visible;
}

.arc-node:hover,
.arc-node:focus-visible {
  transform: translate(-50%, -100%) scale(calc(var(--node-scale, 1) + 0.05));
}

.arc-node:not(.is-active) {
  filter: saturate(0.88);
}

.arc-node.is-active {
  z-index: 3;
  filter: saturate(1.02);
}

.arc-node.is-near-active {
  z-index: 2;
}

.arc-node-icon {
  display: block;
  transform: translateY(-8px);
  transition: transform 0.35s ease;
}

.arc-node-icon img {
  display: block;
  width: 100%;
  height: auto;
  transition: filter 0.35s ease;
}

.arc-node.is-active .arc-node-icon img {
  filter: drop-shadow(0 14px 18px rgba(255, 128, 0, 0.18));
}

.arc-node.is-active .arc-node-icon {
  transform: translateY(-10px);
}

.product-arc-summary {
  position: absolute;
  left: 50%;
  top: 156px;
  width: min(240px, calc(100% - 48px));
  text-align: center;
  transform: translateX(-50%);
  z-index: 4;
}

.product-arc-summary h3 {
  margin: 0;
  color: var(--product-text);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}

.product-arc-summary p {
  display: none;
  margin: 0;
  color: #7c7c7c;
  font-size: 14px;
  line-height: 1.8;
  min-height: 0;
}

.product-arc-carousel.is-compact-copy .product-arc-summary {
  top: 156px;
}

.product-arc-carousel.is-compact-copy .product-arc-summary h3 {
  font-size: 17px;
  font-weight: 600;
}

.product-arc-carousel.is-compact-copy .product-arc-summary p {
  display: none;
}

.promotion-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.promotion-card {
  text-align: center;
}

.promotion-card img {
  box-shadow: var(--product-card-shadow);
}

.promotion-card-tilt {
  transform: rotate(-2deg);
  transform-origin: center top;
}

.promotion-card h3 {
  margin: 22px 0 0;
  color: #555555;
  font-size: 22px;
  font-weight: 500;
}

.operate-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 54px;
  align-items: center;
}

.operate-media img {
  box-shadow: var(--product-card-shadow);
}

.operate-copy h3 {
  margin: 0;
  color: var(--product-text);
  font-size: 48px;
  font-weight: 700;
}

.operate-copy p {
  margin: 18px 0 0;
  color: #555555;
  font-size: 24px;
  line-height: 1.8;
}

.security-carousel {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: center;
}

.security-copy h3 {
  margin: 0;
  color: var(--product-text);
  font-size: 42px;
  font-weight: 700;
}

.security-copy p {
  margin: 18px 0 0;
  color: #575757;
  font-size: 22px;
  line-height: 1.8;
}

.security-media {
  position: relative;
}

.security-slides {
  position: relative;
  min-height: 440px;
  box-shadow: var(--product-card-shadow);
}

.security-slides img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.security-slides img.is-active {
  opacity: 1;
}

.security-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.security-dot {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  background: #d3d3d3;
  cursor: pointer;
}

.security-dot.is-active {
  width: 34px;
  border-radius: 999px;
  background: var(--color-primary);
}

@media (max-width: 1280px) {
  .product-hero-inner {
    min-height: 600px;
  }

  .product-hero-copy h1 {
    font-size: 52px;
  }

  .product-hero-copy p {
    font-size: 28px;
  }

  .operate-copy h3,
  .security-copy h3 {
    font-size: 36px;
  }

  .operate-copy p,
  .security-copy p {
    font-size: 20px;
  }
}

@media (max-width: 1080px) {
  .product-hero-copy {
    padding-left: 0;
  }

  .trust-grid,
  .promotion-grid,
  .operate-panel,
  .security-carousel {
    grid-template-columns: 1fr;
  }

  .trust-stack,
  .trust-stack-bottom {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .trust-card-tall,
  .trust-card-wide,
  .trust-card-square {
    height: auto;
  }

  .product-arc-carousel {
    display: block;
  }

  .arc-control {
    display: none;
  }

  .product-arc-stage {
    min-height: 382px;
  }

  .product-arc-track::before {
    width: min(676px, calc(100% - 44px));
    height: 286px;
  }

  .product-arc-track::after {
    width: calc(100% + 56px);
  }
}

@media (max-width: 768px) {
  :root {
    --product-section-gap: 76px;
  }

  .product-hero {
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.72) 34%, rgba(255, 255, 255, 0.2) 100%),
      url("../image/product/banner.png") 66% center / cover no-repeat;
  }

  .product-hero-inner {
    min-height: 430px;
    padding: 60px 0 48px;
    align-items: flex-start;
  }

  .product-hero-copy h1 {
    font-size: 34px;
  }

  .product-hero-copy p {
    margin-top: 16px;
    font-size: 22px;
  }

  .product-heading h2 {
    font-size: 28px;
  }

  .product-heading p {
    font-size: 16px;
  }

  .trust-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    box-shadow: none;
    background: transparent;
  }

  .trust-card {
    min-height: 220px;
    box-shadow: var(--product-card-shadow);
  }

  .trust-stack,
  .trust-stack-bottom {
    gap: 16px;
  }

  .product-arc-section {
    padding-bottom: 86px;
  }

  .product-arc-stage {
    min-height: 294px;
  }

  .product-arc-track {
    height: 238px;
  }

  .product-arc-track::before {
    bottom: 12px;
    width: calc(100% - 32px);
    height: 184px;
    border-width: 10px;
  }

  .product-arc-track::after {
    width: calc(100% + 24px);
    height: 10px;
  }

  .arc-node {
    width: 54px;
    height: 54px;
  }

  .arc-node-icon {
    transform: translateY(-5px);
  }

  .arc-node.is-active .arc-node-icon {
    transform: translateY(-6px);
  }

  .product-arc-summary {
    top: 102px;
    width: min(180px, calc(100% - 36px));
  }

  .product-arc-summary h3 {
    font-size: 15px;
  }

  .product-arc-summary p {
    font-size: 14px;
    line-height: 1.7;
  }

  .product-arc-carousel.is-compact-copy .product-arc-summary {
    top: 102px;
  }

  .product-arc-carousel.is-compact-copy .product-arc-summary h3 {
    font-size: 15px;
  }

  .promotion-card h3 {
    font-size: 18px;
  }

  .operate-copy h3,
  .security-copy h3 {
    font-size: 28px;
  }

  .operate-copy p,
  .security-copy p {
    font-size: 16px;
  }

  .security-slides {
    min-height: 240px;
  }
}