/* ========================================
   S7: METHODOLOGY — 4-phase system (Gemini Style)
   ======================================== */

.methodology {
  padding: 6rem 0;
  background-color: #131313;
}

.methodology__header {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 4rem;
  padding: 0 clamp(24px, 4vw, 80px);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .methodology__header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.methodology__intro {
  max-width: 32rem;
}

.methodology__label {
  background-color: #05ECE7;
  color: #006764;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
  display: inline-block;
}

.methodology__title {
  font-family: 'Inter', sans-serif; /* Inter字体 */
  font-size: clamp(3rem, 6vw, 6rem); /* 响应式字号 */
  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: 1.5rem; /* 下边距 */
}

.methodology__description {
  font-size: 1.125rem; /* 与card-text保持一致 */
  font-weight: 500;
  line-height: 1.6;
  color: #e6bcbd;
  max-width: 36rem;
}

.methodology__watermark {
  display: none;
  text-align: right;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .methodology__watermark {
    display: block;
  }
}

.methodology__watermark span {
  font-size: 8rem;
  font-weight: 900;
  line-height: 1;
  color: #2A2A2A;
  letter-spacing: -0.025em;
  user-select: none;
}

/* Grid */
.methodology__grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid #353534;
  border-bottom: 1px solid #353534;
}

@media (min-width: 768px) {
  .methodology__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .methodology__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Phase Cards */
.methodology__phase {
  border-right: 1px solid #353534;
  min-height: 40.625rem;
  display: flex;
  flex-direction: column;
  background-color: #1C1B1B;
  transition: background-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.methodology__phase:last-child {
  border-right: none;
}

.methodology__phase:hover {
  background-color: #353534;
}

.methodology__phase--validation {
  background-color: #201F1F;
}

.methodology__phase--scaling {
  background-color: #2A2A2A;
}

.methodology__phase--system {
  background-color: #131313;
}

/* Phase Content */
.methodology__phase-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 10;
}

.methodology__phase-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3rem;
}

.methodology__phase-number {
  font-family: 'Inter', sans-serif; /* 与Aggressive Precision保持一致 */
  font-size: clamp(2.5rem, 4vw, 3.5rem); /* 比Aggressive Precision小一些 */
  font-weight: 900; /* 加粗 */
  font-style: italic; /* 斜体 */
  line-height: 1;
  letter-spacing: -0.025em; /* 略微紧缩字间距 */
  color: #25F4EE;
}

.methodology__phase-number--purple {
  color: #9B5DE5;
}

.methodology__phase-number--red {
  color: #FF2D55;
}

.methodology__phase-number--white {
  color: #ffffff;
}

.methodology__phase-time {
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 900; /* 加粗 */
  letter-spacing: -0.025em;
  text-transform: uppercase;
  color: #000000;
}

.methodology__phase-time--cyan {
  background-color: #25F4EE;
}

.methodology__phase-time--purple {
  background-color: #9B5DE5;
}

.methodology__phase-time--red {
  background-color: #FF2D55;
}

.methodology__phase-time--white {
  background-color: #ffffff;
}

.methodology__phase-title {
  font-family: 'Inter', sans-serif; /* 与Aggressive Precision保持一致 */
  font-size: clamp(1.5rem, 3vw, 3rem); /* 再小一些 */
  font-weight: 900; /* 加粗 */
  font-style: italic; /* 斜体 */
  text-transform: uppercase;
  line-height: 0.8; /* 紧密行间距 */
  color: #ffffff;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
}

.methodology__phase-desc {
  color: #e6bcbd;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  font-weight: 700; /* 加粗 */
}

/* Phase Items */
.methodology__phase-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
  list-style: none;
}

.methodology__phase-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.methodology__phase-icon {
  font-size: 1.2rem;
  margin-right: 0.5rem;
  font-weight: 400;
  display: inline-block;
}

.methodology__phase--discovery .methodology__phase-icon {
  color: #25F4EE;
}

.methodology__phase--validation .methodology__phase-icon {
  color: #9B5DE5;
}

.methodology__phase--scaling .methodology__phase-icon {
  color: #FF2D55;
}

.methodology__phase--system .methodology__phase-icon {
  color: #ffffff;
}

.methodology__phase-item span {
  font-family: var(--font-headline); /* 与card-title保持一致 */
  font-size: 0.75rem;
  font-weight: 400; /* 与card-title保持一致 */
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
}

/* Phase Images */
.methodology__phase-image {
  position: relative;
  height: 14rem;
  width: 100%;
  overflow: hidden;
  margin-top: auto;
}

.methodology__phase-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
  transition: all 0.7s ease;
  transform: scale(1);
}

.methodology__phase:hover .methodology__phase-image img {
  filter: grayscale(0);
  transform: scale(1.1);
}

.methodology__image-overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0.3;
  transition: opacity 0.5s ease;
  z-index: 10;
  mix-blend-mode: screen;
}

.methodology__image-overlay--cyan {
  background-color: #25F4EE;
}

.methodology__image-overlay--purple {
  background-color: #9B5DE5;
}

.methodology__image-overlay--red {
  background-color: #FF2D55;
}

.methodology__image-overlay--white {
  background-color: #ffffff;
}

.methodology__phase:hover .methodology__image-overlay {
  opacity: 0;
}

.methodology__image-gradient {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%, rgba(0,0,0,0.4) 100%);
  z-index: 10;
}

/* Progress Bars */
.methodology__progress {
  height: 0.25rem;
  width: 100%;
  overflow: hidden;
  background: rgba(0,0,0,0.5);
  position: relative;
  z-index: 20;
}

.methodology__progress::after {
  content: '';
  position: absolute;
  height: 100%;
  width: 0;
  animation: progress-fill 1s ease-out 0.5s both;
}

.methodology__progress--cyan::after {
  background-color: #25F4EE;
  animation-name: progress-fill-25;
}

.methodology__progress--purple::after {
  background-color: #9B5DE5;
  animation-name: progress-fill-50;
}

.methodology__progress--red::after {
  background-color: #FF2D55;
  animation-name: progress-fill-75;
}

.methodology__progress--white::after {
  background-color: #ffffff;
  animation-name: progress-fill-100;
}

@keyframes progress-fill-25 {
  from { width: 0; }
  to { width: 25%; }
}

@keyframes progress-fill-50 {
  from { width: 0; }
  to { width: 50%; }
}

@keyframes progress-fill-75 {
  from { width: 0; }
  to { width: 75%; }
}

@keyframes progress-fill-100 {
  from { width: 0; }
  to { width: 100%; }
}