/* ============================================================
 *  Project Tabs (项目导航)
 * ============================================================ */
.project-tabs {
  position: relative;
  z-index: 5;
  margin-top: -28px;
}

.project-tabs__inner {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-2);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.project-tab {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
  position: relative;
  background: transparent;
  text-align: left;
  min-height: 60px;
}

.project-tab__index {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
  flex: none;
}

.project-tab__icon {
  width: 28px;
  height: 28px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--duration) var(--ease-out);
}

.project-tab__icon svg {
  width: 16px;
  height: 16px;
}

.project-tab__title {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
  flex: 1;
  min-width: 0;
}

.project-tab:hover {
  background: var(--color-bg-soft);
}

.project-tab:hover .project-tab__icon {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.project-tab.is-active {
  background: var(--gradient-primary);
}

.project-tab.is-active .project-tab__index,
.project-tab.is-active .project-tab__title {
  color: #fff;
}

.project-tab.is-active .project-tab__icon {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

@media (max-width: 1100px) {
  .project-tabs__inner {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 700px) {
  .project-tabs {
    margin-top: var(--sp-4);
  }
  .project-tabs__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-1);
  }
  .project-tab {
    min-height: 52px;
    padding: var(--sp-3);
  }
  .project-tab__title {
    font-size: var(--fs-xs);
  }
}

/* ============================================================
 *  Showcase (方案展示)
 * ============================================================ */
.showcase {
  padding: var(--sp-12) 0 var(--sp-8);
  position: relative;
}

.showcase__container {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

/* 顶部公司 logo + 标题区 */
.showcase__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-6);
  margin-bottom: var(--sp-6);
}

.showcase__brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.showcase__brand-mark {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
}

.showcase__brand-text {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.showcase__brand-text small {
  display: block;
  font-size: 10px;
  color: var(--color-text-tertiary);
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-top: 2px;
}

.showcase__main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
  min-height: 460px;
}

.showcase__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--sp-4);
  background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.showcase__subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--sp-6);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.showcase__subtitle::before {
  content: "";
  width: 4px;
  height: 18px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

/* Features (4 个特性) */
.showcase__features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}

.feature-item {
  text-align: center;
  padding: var(--sp-3) var(--sp-2);
}

.feature-item__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--sp-2);
  display: grid;
  place-items: center;
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.feature-item__icon svg {
  width: 20px;
  height: 20px;
}

.feature-item__label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
}

.feature-item__en {
  font-size: 10px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Pipeline (管道流程) */
.showcase__pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
  position: relative;
  padding-top: var(--sp-4);
  border-top: 1px dashed var(--color-border);
}

.pipeline-node {
  text-align: center;
  position: relative;
}

.pipeline-node__circle {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--sp-2);
  border-radius: 50%;
  background: linear-gradient(135deg, #fff 0%, #f1f5f9 100%);
  border: 2px solid var(--color-primary-soft);
  display: grid;
  place-items: center;
  color: var(--color-primary);
  position: relative;
  z-index: 2;
}

.pipeline-node__circle svg {
  width: 24px;
  height: 24px;
}

.pipeline-node:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 28px;
  left: calc(50% + 28px);
  width: calc(100% - 56px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-light), transparent, var(--color-primary-light));
  background-size: 8px 2px;
  background-image: linear-gradient(to right, var(--color-primary-light) 50%, transparent 50%);
  z-index: 1;
}

.pipeline-node__label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
}

.pipeline-node__en {
  font-size: 10px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

/* 右侧画面（机械臂仿真区） */
.showcase__visual {
  position: relative;
  aspect-ratio: 16 / 11;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
  box-shadow: var(--shadow-lg);
}

.showcase__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(96, 165, 250, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, 0.15) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.showcase__visual img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showcase__visual .visual-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.4);
  font-family: var(--font-mono);
  text-align: center;
  padding: var(--sp-6);
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
}

/* 右上角参数卡片 */
.showcase__panel {
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-4);
  width: 220px;
  padding: var(--sp-4);
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: var(--radius-md);
  z-index: 2;
}

.showcase__panel-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: rgba(96, 165, 250, 0.9);
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
}

.indicator {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.85);
}

.indicator__name {
  flex: 1;
  font-size: 10px;
  letter-spacing: 0.04em;
}

.indicator__bar {
  width: 50px;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

.indicator__bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #60a5fa, #a78bfa);
  border-radius: 2px;
  transition: width 1s var(--ease-out);
}

.indicator__value {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-cyan-light);
  width: 32px;
  text-align: right;
}

/* Showcase 分页（01/15 等） */
.showcase__pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
}

.showcase__pager-num {
  color: var(--color-primary);
  font-weight: 600;
}

@media (max-width: 900px) {
  .showcase__main { grid-template-columns: 1fr; }
  .showcase__features {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase__pipeline {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-4);
  }
  .pipeline-node:not(:last-child)::after { display: none; }
  .showcase__panel {
    width: 180px;
    padding: var(--sp-3);
  }
}