/* ========================================
   technology.css - 技术创新页面样式
   ======================================== */

.tech-intro { padding: 80px 0; }
.tech-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.tech-intro-content h2 { font-size: 34px; font-weight: 800; margin-bottom: 16px; }
.tech-intro-content p { font-size: 16px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; }
.tech-intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.tech-intro-image img { width: 100%; height: 380px; object-fit: cover; }

/* 技术路线图 */
.tech-roadmap { padding: 100px 0; background: var(--bg-light); }
.roadmap-track {
  display: flex;
  gap: 0;
  position: relative;
  padding-top: 30px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.roadmap-track::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.roadmap-item {
  flex: 1;
  min-width: 220px;
  padding: 0 16px;
  text-align: center;
  position: relative;
}
.roadmap-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid white;
  box-shadow: 0 0 0 3px rgba(126,182,59,0.2);
  margin: 0 auto 20px;
  position: relative;
  z-index: 2;
}
.roadmap-version {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: rgba(126,182,59,0.08);
  padding: 4px 12px;
  border-radius: 50px;
  display: inline-block;
  margin-bottom: 10px;
}
.roadmap-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.roadmap-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* 安全体系 */
.safety-section { padding: 100px 0; }
.safety-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.safety-layer {
  text-align: center;
  padding: 30px 16px;
  border-radius: var(--radius-md);
  background: white;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}
.safety-layer:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--primary);
}
.safety-layer-num {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.safety-layer-icon {
  font-size: 32px;
  margin-bottom: 12px;
  color: var(--primary);
}
.safety-layer h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.safety-layer p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* 专利展示 */
.patents-section { padding: 100px 0; background: var(--bg-dark); }
.patents-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.patent-card {
  padding: 28px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  transition: var(--transition);
  text-align: center;
}
.patent-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-5px);
}
.patent-icon { font-size: 28px; margin-bottom: 12px; }
.patent-card h4 { font-size: 15px; font-weight: 700; color: white; margin-bottom: 6px; }
.patent-card p { font-size: 13px; color: rgba(255,255,255,0.55); line-height: 1.6; }

.patent-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 50px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.patent-stat-item {
  padding: 40px 20px;
  position: relative;
}
/* 水平分割线（除了最后一列） */
.patent-stat-item:not(:nth-child(4n))::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: rgba(255,255,255,0.1);
}
.patent-stat-number {
  font-size: 48px;
  font-weight: 800;
  font-family: var(--font-en);
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.patent-unit {
  font-size: 24px;
  font-weight: 600;
}
.patent-stat-label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* 产学研合作 */
.cooperation-section { padding: 100px 0; background: white; }
.cooperation-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cooperation-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 30px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: var(--transition);
}
.cooperation-item:hover {
  border-color: var(--primary);
  background: white;
  box-shadow: 0 8px 24px rgba(126,182,59,0.1);
}
.coop-icon { font-size: 36px; flex-shrink: 0; }
.cooperation-item h4 { font-size: 17px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.cooperation-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* 响应式 */
@media (max-width: 1024px) {
  .tech-intro-grid { grid-template-columns: 1fr; }
  .safety-grid { grid-template-columns: repeat(3, 1fr); }
  .patents-grid { grid-template-columns: repeat(2, 1fr); }
  .cooperation-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .tech-intro-content h2 { font-size: 28px; }
  .tech-intro-image img { height: 260px; }
  .safety-grid { grid-template-columns: 1fr 1fr; }
  .patents-grid { grid-template-columns: 1fr; }
  .patent-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 移动端：2x2布局，添加上下左右分割线 */
  .patent-stat-item {
    padding: 30px 16px;
  }
  /* 右侧分割线（第1、3个） */
  .patent-stat-item:nth-child(odd)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 15%;
    bottom: 15%;
    width: 1px;
    background: rgba(255,255,255,0.1);
  }
  /* 底部分割线（第1、2个） */
  .patent-stat-item:nth-child(1)::before,
  .patent-stat-item:nth-child(2)::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: rgba(255,255,255,0.1);
  }
  .patent-stat-number { font-size: 36px; }
  .patent-unit { font-size: 18px; }
}

/* CTA 技术交流板块 - 按钮靠右 */
.cta-section {
  text-align: left;
  padding: 10px;
}
.cta-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-title {
  font-size: 32px;
  margin-bottom: 8px;
}
.cta-desc {
  margin-bottom: 0;
  margin-left: 0;
  margin-right: 0;
}
.cta-actions {
  justify-content: flex-end;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .cta-content {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }
  .cta-title { font-size: 26px;}
  .cta-desc { margin-bottom: 0; }
  .cta-actions { justify-content: center; }
}

/* ========================================
   云边端架构与AI算法
   ======================================== */
.tech-arch-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.tech-arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.tech-arch-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.tech-arch-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.arch-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
}

.arch-icon {
  width: 56px;
  height: 56px;
  background: rgba(126,182,59,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.arch-header h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.arch-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.arch-content li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.arch-content li:last-child {
  border-bottom: none;
}

.arch-content li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.ai-algorithms {
  margin-top: 60px;
}

.ai-algorithms h3 {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 40px;
  color: var(--text-primary);
}

.algo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.algo-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.algo-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.algo-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.algo-item h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.algo-item p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   区块链技术
   ======================================== */
.blockchain-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #0a1628 0%, #1a2a4a 100%);
  color: #fff;
}

.blockchain-section .section-title {
  color: #fff;
}

.blockchain-section .section-subtitle {
  color: rgba(255,255,255,0.7);
}

.blockchain-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 50px;
}

.blockchain-intro h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.blockchain-intro p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
  margin-bottom: 30px;
}

.blockchain-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bc-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.bc-icon {
  width: 48px;
  height: 48px;
  background: rgba(126,182,59,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.bc-text h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.bc-text p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin: 0;
}

.blockchain-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.chain-demo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chain-block {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  width: 140px;
  text-align: center;
  backdrop-filter: blur(10px);
}

.block-header {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.block-data {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.block-data span {
  font-size: 13px;
  color: rgba(255,255,255,0.9);
}

.block-hash {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  font-family: monospace;
}

.chain-link {
  font-size: 24px;
  color: var(--primary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .tech-arch-grid {
    grid-template-columns: 1fr;
  }
  .algo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .blockchain-content {
    grid-template-columns: 1fr;
  }
  .chain-demo {
    flex-direction: column;
  }
  .chain-link {
    transform: rotate(90deg);
  }
}

@media (max-width: 768px) {
  .algo-grid {
    grid-template-columns: 1fr;
  }
  .blockchain-features {
    flex-direction: row;
    gap: 10px;
  }
  .bc-feature {
    flex: 1;
    flex-direction: column;
    text-align: center;
    align-items: center;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 10px;
    padding: 14px 8px;
    gap: 8px;
  }
  .bc-icon {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
  .bc-text h4 {
    font-size: 13px;
    margin-bottom: 4px;
  }
  .bc-text p {
    font-size: 11px;
  }
  .chain-demo {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
  }
  .chain-link {
    transform: none;
    font-size: 16px;
  }
  .chain-block {
    width: 88px;
    padding: 10px 8px;
    flex-shrink: 0;
  }
  .block-header {
    font-size: 10px;
    margin-bottom: 8px;
    padding-bottom: 6px;
  }
  .block-data span {
    font-size: 11px;
  }
  .block-hash {
    font-size: 9px;
  }
}