/* 一级：模块总览 */
.screen--overview {
  background:
    radial-gradient(1100px 520px at 50% 28%, rgba(200, 16, 46, 0.16), transparent 65%),
    linear-gradient(180deg, #0d1224 0%, #06080f 100%);
}

.overview-topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 160px;
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 0 60px;
}

.overview-heading {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: 6px;
  color: #fff;
}

.overview-hint {
  flex: 1;
  font-size: 30px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-align: right;
  margin-right: 10px;
}

/* 内容区域：上至顶栏下沿，下至指示器 */
.overview-content {
  position: absolute;
  top: 170px;
  left: 0;
  right: 0;
  bottom: 120px;
}

.overview-viewport {
  position: absolute;
  top: 0;
  left: 140px;
  right: 140px;
  bottom: 80px;
  overflow: hidden;
}

.overview-track {
  display: flex;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
}

.overview-slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
}

.overview-slide-inner {
  display: grid;
  grid-template-columns: 840px 1fr;
  gap: 80px;
  align-items: center;
  height: 100%;
  padding: 30px 20px;
}

.overview-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 34px;
}

.overview-index {
  font-size: 34px;
  letter-spacing: 6px;
  color: var(--crcc-red-bright);
  font-weight: 700;
}

.overview-title {
  font-size: 130px;
  font-weight: 700;
  letter-spacing: 10px;
  line-height: 1.05;
  color: #fff;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.55);
}

.overview-desc {
  font-size: 42px;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 780px;
}

.overview-cta {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-size: 38px;
  letter-spacing: 3px;
  color: #fff;
}

.overview-cta-accent {
  width: 16px;
  height: 52px;
  border-radius: 8px;
  background: linear-gradient(180deg, var(--crcc-red-bright), var(--crcc-red));
  box-shadow: 0 0 22px rgba(200, 16, 46, 0.7);
}

.overview-covers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  height: 100%;
  max-height: 820px;
}

.overview-cover {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #000;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.overview-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.overview-cover:hover img {
  transform: scale(1.06);
}

/* 模块指示器 */
.overview-indicator {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.overview-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transition: background 0.25s ease, transform 0.25s ease;
}

.overview-dot.is-active {
  background: var(--crcc-red-bright);
  transform: scale(1.35);
  box-shadow: 0 0 18px rgba(229, 35, 61, 0.8);
}