/* style.css*/
@font-face {
  font-family: 'Ysbth';
  src: url('https://corextm.com/fonts/ysbth.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

body {
  background-color: var(--ksab-bg);
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  scroll-behavior: smooth;
}

.main-wrapper {
  min-height: 100vh;
  position: relative;
}

.initial-content {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* 吸顶头部 滚动缩放/透明动画（核心原有交互保留） */
.sticky-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding-top: 20px;
  padding-bottom: 20px;
  --scale-factor: 1;
  --bg-opacity: 0;
  transform: scale(var(--scale-factor));
  transform-origin: center top;
  transition: transform 0.1s linear;
  background-color: rgba(255, 255, 255, var(--bg-opacity));
  backdrop-filter: blur(calc(var(--bg-opacity) * 10px));
  -webkit-backdrop-filter: blur(calc(var(--bg-opacity) * 10px));
  padding-left: 20px;
  padding-right: 20px;
  box-sizing: border-box;
}

h1 {
  font-size: 0;
  text-indent: -9999px;
  display: block;
  margin-bottom: 20px;
}
h1 img {
  display: block;
  max-width: 300px;
  height: auto;
  transition: transform 0.1s linear;
}

.slogan {
  color: var(--ksab-primary);
  font-size: 22px;
  text-align: center;
  font-family: 'Ysbth', sans-serif;
  font-weight: normal;
  line-height: 1.4;
  margin-top: 10px;
}

.about-section {
  margin: 0 auto 100px;
  padding: 60px 20px;
  text-align: center;
}

.about-content {
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ksab-text);
}

/* 产品网格布局 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-top: 40px;
}
.product-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.project-image {
  width: 100%;
  max-width: 320px;
  height: 180px;
  background-color: #f5f5f5;
  border-radius: var(--ksab-radius);
  overflow: hidden;
  margin-bottom: 20px;
  transition: border-radius var(--ksab-transition);
}
.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--ksab-radius);
  transition: border-radius var(--ksab-transition);
}
.project-name {
  color: var(--ksab-text);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}
.project-description {
  color: var(--ksab-label);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}

/* 团队成员网格 */
.team-members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-top: 40px;
}
.team-member {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.member-name {
  color: var(--ksab-text);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

/* 文化字母悬停特效（保留原动画） */
.culture-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.letter-item {
  position: relative;
  width: 100px;
  height: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  overflow: hidden;
}
.letter {
  font-size: 5rem;
  font-weight: 900;
  color: var(--ksab-primary);
  font-family: 'Ysbth', sans-serif;
  transition: all 0.4s ease;
}
.full-text {
  position: absolute;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--ksab-primary);
  font-family: 'Ysbth', sans-serif;
  opacity: 0;
  white-space: nowrap;
  transform: scale(0.8);
  transition: all 0.4s ease;
  letter-spacing: -0.5px;
}
.culture-container:hover .letter-item {
  width: 200px;
}
.culture-container:hover .letter {
  opacity: 0;
  transform: scale(0.5);
}
.culture-container:hover .full-text {
  opacity: 1;
  transform: scale(1);
}
.culture-container:hover .letter-item:nth-child(4) {
  width: 280px;
}
.culture-container:hover .letter-item:nth-child(4) .full-text {
  font-size: 2.2rem;
  letter-spacing: -1px;
}
.letter-item:nth-child(1) { transition-delay: 0.05s; }
.letter-item:nth-child(2) { transition-delay: 0.1s; }
.letter-item:nth-child(3) { transition-delay: 0.15s; }
.letter-item:nth-child(4) { transition-delay: 0.2s; }
.letter-item:nth-child(1) .full-text { transition-delay: 0.1s; }
.letter-item:nth-child(2) .full-text { transition-delay: 0.2s; }
.letter-item:nth-child(3) .full-text { transition-delay: 0.3s; }
.letter-item:nth-child(4) .full-text { transition-delay: 0.4s; }

/* 合作伙伴滚动轮播 */
.partner-scroll-wrap {
  width: 100%;
  overflow: hidden;
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.partner-list {
  display: flex;
  align-items: center;
  gap: 30px;
  white-space: nowrap;
  animation: scrollLoop 25s linear infinite;
}
.partner-row1 { animation-direction: normal; }
.partner-row2 { animation-direction: reverse; }
.partner-scroll-wrap:hover .partner-list {
  animation-play-state: paused;
}
.partner-item {
  display: inline-flex;
  width: 160px;
  height: 120px;
  border-radius: 8px;
  flex-shrink: 0;
  transition: transform var(--ksab-transition);
  background: transparent;
  box-shadow: none;
  padding: 0;
  transform: translateY(0) !important;
}
.partner-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}
.partner-item:hover {
  transform: translateY(-6px);
}
@keyframes scrollLoop {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 页脚区域 */
.footer-section {
  max-width: 800px;
  margin: 0 auto 60px;
  padding: 40px 20px 0;
  text-align: center;
  border-top: 1px solid #f0f0f0;
}
.contact-info {
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ksab-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.contact-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.contact-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.contact-label {
  font-weight: 600;
  color: var(--ksab-text);
}
.contact-content {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ksab-label);
}
.contact-content span {
  white-space: nowrap;
}
.footer-section .about-content {
  margin-bottom: 0;
}

/* 移动端响应式 */
@media (max-width: 768px) {
  .letter-item {
    width: 80px;
    height: 80px;
  }
  .letter {
    font-size: 4rem;
  }
  .full-text {
    font-size: 2rem;
  }
  .culture-container:hover .letter-item {
    width: 160px;
  }
  .culture-container:hover .letter-item:nth-child(4) {
    width: 220px;
  }
  .culture-container:hover .letter-item:nth-child(4) .full-text {
    font-size: 1.8rem;
  }
  .partner-item {
    width: 120px;
    height: 90px;
  }
  .partner-list {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .culture-container {
    gap: 15px;
  }
  .letter-item {
    width: 60px;
    height: 60px;
  }
  .letter {
    font-size: 3rem;
  }
  .full-text {
    font-size: 1.5rem;
  }
  .culture-container:hover .letter-item {
    width: 130px;
  }
  .culture-container:hover .letter-item:nth-child(4) {
    width: 180px;
  }
  .culture-container:hover .letter-item:nth-child(4) .full-text {
    font-size: 1.4rem;
  }
  .partner-item {
    width: 90px;
    height: 67.5px;
  }
  .partner-list {
    gap: 15px;
  }
}