/* ========================================
   S9: CTA — Call to action (Gemini Style)
   ======================================== */

.cta-section {
  background-color: #131313;
  padding-top: 3rem;
  padding-bottom: 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Main CTA Content */
.cta-section__main {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 clamp(24px, 4vw, 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 6rem;
}

.cta-section__label {
  display: inline-block;
  background-color: #05ECE7;
  color: #006764;
  font-weight: 900;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-bottom: 2rem;
}

.cta-section__headline {
  font-family: 'Inter', sans-serif; /* Inter字体 */
  font-size: clamp(3rem, 6vw, 8rem); /* 响应式：48px~128px */
  font-weight: 900; /* 最粗字重 */
  font-style: italic; /* 斜体 */
  line-height: 0.8; /* 紧密行间距 */
  letter-spacing: -0.025em; /* 略微紧缩字间距 */
  color: white; /* 白色 */
  text-transform: uppercase; /* 全大写 */
  margin-bottom: 4rem; /* 下边距 */
  max-width: 80rem;
}

/* Buttons */
.cta-section__buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

@media (min-width: 768px) {
  .cta-section__buttons {
    flex-direction: row;
    width: auto;
  }
}

.cta-section__btn-primary {
  background-color: #FF2D55;
  color: #40000C;
  font-size: 1.125rem;
  font-weight: 900;
  text-transform: uppercase;
  padding: 1.5rem 3rem;
  letter-spacing: -0.025em;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  transition: all 0.2s ease;
}

.cta-section__btn-primary:hover {
  background-color: #25F4EE;
}

.cta-section__arrow {
  font-size: 1.5rem;
  font-weight: 900;
  transform: translateX(0);
  transition: transform 0.2s ease;
}

.cta-section__btn-primary:hover .cta-section__arrow {
  transform: translateX(0.5rem);
}

.cta-section__btn-secondary {
  border: 2px solid #5d3f40;
  background: transparent;
  color: #e5e2e1;
  font-size: 1.125rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 1.5rem 3rem;
  letter-spacing: -0.025em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.cta-section__btn-secondary:hover {
  background-color: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

/* Dynamic Image Blocks */
.cta-section__blocks {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  background-color: #1C1B1B;
  border-top: 1px solid #353534;
  border-bottom: 1px solid #353534;
}

@media (min-width: 768px) {
  .cta-section__blocks {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Individual Blocks */
.cta-section__block {
  aspect-ratio: 1;
  position: relative;
  overflow: hidden;
  border-right: 1px solid #353534;
}

.cta-section__block:last-child {
  border-right: none;
}

/* Image Blocks */
.cta-section__block img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
  transition: all 0.3s ease;
  transform: scale(1);
}

.cta-section__block:hover img {
  filter: grayscale(0);
  transform: scale(1.05);
}

.cta-section__overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  mix-blend-mode: multiply;
  transition: background-color 0.3s ease;
}

.cta-section__overlay--red {
  background-color: rgba(255, 45, 85, 0.2);
}

.cta-section__overlay--cyan {
  background-color: rgba(37, 244, 238, 0.2);
}

.cta-section__overlay--purple {
  background-color: rgba(155, 93, 229, 0.2);
}

.cta-section__block:hover .cta-section__overlay {
  background-color: transparent;
}

.cta-section__badge {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
}

.cta-section__badge p {
  font-size: 0.75rem;
  font-weight: 900;
  background-color: #000000;
  padding: 0.5rem 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin: 0;
}

.cta-section__block:nth-child(1) .cta-section__badge p {
  color: #FF2D55;
}

.cta-section__block:nth-child(3) .cta-section__badge p {
  color: #9B5DE5;
}

/* Video Block */
.cta-section__block--video {
  background-color: #000000;
}

.cta-section__block--video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
  filter: grayscale(1);
  transition: all 0.3s ease;
}

.cta-section__block--video:hover video {
  opacity: 1;
  filter: grayscale(0);
}

.cta-section__content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  z-index: 10;
}

.cta-section__icon {
  width: 4rem;
  height: 4rem;
  font-size: 2rem;
  color: #25F4EE;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}

.cta-section__title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 1rem;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: -0.025em;
}

.cta-section__desc {
  font-size: 0.75rem;
  color: #e6bcbd;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-weight: 700;
  max-width: 18rem;
}