.page-shell {
  background: linear-gradient(180deg, #eef9fb 0, #f2f2ff 112px, #fff 336px);
}

.site-header {
  justify-content: flex-end;
  padding: 18px 44px;
}

.site-header > a:first-child:last-child {
  margin-left: auto;
}

.hero {
  padding: 66px 24px 74px;
}

.hero-inner {
  grid-template-columns: minmax(0, 440px) minmax(420px, 638px);
  gap: 72px;
  max-width: 1220px;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-title {
  margin-bottom: 18px;
  color: #252833;
  font-size: 58px;
  font-weight: 780;
  line-height: 1.13;
  overflow-wrap: anywhere;
}

.hero-desc {
  margin-bottom: 34px;
  color: #4a5060;
  font-size: 23px;
}

.primary-button {
  width: auto;
  min-width: 142px;
  height: 50px;
  border-radius: 25px;
  background: linear-gradient(135deg, #6882ff 0, #7755f3 100%);
  box-shadow: 0 14px 28px rgba(112, 101, 248, 0.26);
  font-size: 17px;
  font-weight: 700;
  padding: 0 28px;
}

.primary-button:hover {
  box-shadow: 0 18px 34px rgba(112, 101, 248, 0.32);
  transform: translateY(-2px);
}

.showcase-frame {
  aspect-ratio: 612 / 344;
  border-radius: 28px;
  background: linear-gradient(150deg, #eef9fb 0, #f3f4ff 38%, #fff 72%);
  box-shadow: 0 24px 70px rgba(83, 96, 160, 0.18);
}

.showcase-frame img {
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 28px;
  object-fit: cover;
}

.content-section {
  max-width: 1280px;
  padding-top: 72px;
}

.mobile-only {
  display: none;
}

.section-title {
  margin-bottom: 18px;
  white-space: nowrap;
}

.section-subtitle {
  margin-bottom: 58px;
  white-space: nowrap;
}

.content-card-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px 28px;
}

.content-card-list li {
  min-height: 420px;
  padding: 28px;
  border: 1px solid #edf0f6;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 14px 28px rgba(20, 24, 36, 0.16);
}

.content-card-copy {
  min-height: 142px;
}

.content-card-title {
  margin: 0 0 18px;
  color: #10131c;
  font-size: 24px;
  font-weight: 750;
  line-height: 1.28;
  overflow-wrap: anywhere;
}

.content-card-body {
  margin: 0;
  color: #646b7a;
  font-size: 17px;
  line-height: 1.72;
  overflow-wrap: anywhere;
}

.content-card-image {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: auto;
  border-radius: 10px;
  background: #f2f4ff;
  object-fit: cover;
}

.lovart-qa-section {
  max-width: 980px;
  margin: 0 auto;
  padding: 34px 24px 112px;
}

.lovart-qa-section .section-title {
  margin-bottom: 42px;
  text-align: center;
  white-space: normal;
}

.lovart-qa-list {
  display: grid;
  gap: 18px;
}

.lovart-qa-card {
  border: 1px solid #edf0f6;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 14px 30px rgba(20, 24, 36, 0.1);
  overflow: hidden;
}

.lovart-qa-card summary {
  position: relative;
  display: flex;
  min-height: 72px;
  align-items: center;
  padding: 22px 68px 22px 28px;
  color: #10131c;
  cursor: pointer;
  font-size: 20px;
  font-weight: 750;
  line-height: 1.35;
  list-style: none;
}

.lovart-qa-card summary::-webkit-details-marker {
  display: none;
}

.lovart-qa-card summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 28px;
  width: 10px;
  height: 10px;
  border-right: 2px solid #6f63f6;
  border-bottom: 2px solid #6f63f6;
  transform: translateY(-65%) rotate(45deg);
  transition: transform 0.18s ease;
}

.lovart-qa-card[open] summary::after {
  transform: translateY(-35%) rotate(225deg);
}

.lovart-qa-card p {
  margin: 0;
  padding: 0 28px 26px;
  color: #646b7a;
  font-size: 17px;
  line-height: 1.8;
}

.site-footer {
  padding: 0 20px 32px;
  text-align: center;
}

.site-footer p {
  margin: 0;
  color: #8c93a3;
  font-size: 13px;
  line-height: 1.7;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover {
  color: #6f63f6;
}

@media (max-width: 960px) {
  .content-card-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 16px 20px;
  }

  .hero {
    padding: 34px 20px 58px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .hero-copy {
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
  }

  .hero-title {
    font-size: 36px;
    line-height: 1.16;
  }

  .hero-desc {
    font-size: 18px;
  }

  .primary-button {
    min-width: 128px;
    height: 46px;
  }

  .showcase-frame,
  .showcase-frame img {
    border-radius: 22px;
  }

  .section-title {
    max-width: 360px;
    margin-right: auto;
    margin-left: auto;
    font-size: 24px;
    line-height: 1.28;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-all;
  }

  .mobile-only {
    display: initial;
  }

  .section-subtitle {
    max-width: 360px;
    margin-right: auto;
    margin-left: auto;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-all;
  }

  .content-card-list {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .content-card-list li {
    min-height: 0;
    padding: 24px;
  }

  .content-card-copy {
    min-height: 0;
  }

  .content-card-title {
    font-size: 22px;
  }

  .content-card-body {
    font-size: 16px;
  }

  .lovart-qa-section {
    padding: 18px 20px 76px;
  }

  .lovart-qa-section .section-title {
    margin-bottom: 28px;
  }

  .lovart-qa-card summary {
    min-height: 64px;
    padding: 18px 54px 18px 20px;
    font-size: 18px;
  }

  .lovart-qa-card summary::after {
    right: 22px;
  }

  .lovart-qa-card p {
    padding: 0 20px 22px;
    font-size: 16px;
  }
}