/* ========== 仅保留 Tailwind 无法实现的动画与伪元素 ========== */

* {
  box-sizing: border-box;
}

html {
  overflow: hidden;
  height: 100%;
}

body {
  overflow: hidden;
  height: 100%;
}

/* 科技感网格背景：大范围 inset 避免左/上边缘裁切接缝，translateZ 促成分层减少闪烁 */
body::before {
  content: '';
  position: fixed;
  inset: -300px;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: 0 0;
  z-index: 0;
  pointer-events: none;
  backface-visibility: hidden;
  will-change: transform;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% {
    transform: translateZ(0) translate(0, 0);
  }

  100% {
    transform: translateZ(0) translate(50px, 50px);
  }
}

/* Hero 旋转光晕 */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
  animation: rotateGlow 20s linear infinite;
  pointer-events: none;
}

@keyframes rotateGlow {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* CTA 按钮扫光 */
.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.cta-button:hover::before {
  left: 100%;
}

/* 导航链接下划线 */
.nav-link-underline::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  transition: width 0.3s ease;
}

.nav-link-underline:hover::after {
  width: 100%;
}

/* 关于我们 - 标题下划线 */
.about-title-underline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  border-radius: 2px;
  animation: expandLine 1s ease-out 0.5s both;
}

@keyframes expandLine {
  from {
    width: 0;
  }

  to {
    width: 60px;
  }
}

/* 关于我们 - 段落前箭头 */
.about-text-bullet::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: #2563eb;
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.3s ease;
}

.about-text-bullet:hover::before {
  opacity: 1;
  transform: translateX(0);
}

/* 卡片扫光效果 */
.card-shine::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.06), transparent);
  transition: left 0.5s ease;
}

.card-shine:hover::before {
  left: 100%;
}

/* 关于高亮图标浮动 */
@keyframes floatIcon {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

.about-highlight-icon {
  animation: floatIcon 3s ease-in-out infinite;
}

/* 滚动提示箭头与弹跳 */
.scroll-hint::before {
  content: '↓';
  display: block;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}


/* 指示器悬停文案 */
.indicator-dot[data-section]::after {
  content: attr(data-section);
  position: absolute;
  right: 25px;
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.indicator-dot:hover::after {
  opacity: 1;
}

@media (max-width: 768px) {
  .indicator-dot[data-section]::after {
    display: none;
  }
}

/* 3D 翻页动画 */
.page-wrapper {
  transform-style: preserve-3d;
  backface-visibility: hidden;
  transition: transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
  transform-origin: center center;
}

.page-wrapper.flip-out-up {
  transform: rotateX(-90deg);
  opacity: 0;
}

.page-wrapper.flip-out-down {
  transform: rotateX(90deg);
  opacity: 0;
}

.page-wrapper.flip-in-up {
  animation: flipInUp 0.8s cubic-bezier(0.645, 0.045, 0.355, 1) forwards;
}

.page-wrapper.flip-in-down {
  animation: flipInDown 0.8s cubic-bezier(0.645, 0.045, 0.355, 1) forwards;
}

@keyframes flipInUp {
  from {
    transform: rotateX(90deg);
    opacity: 0;
  }

  to {
    transform: rotateX(0deg);
    opacity: 1;
  }
}

@keyframes flipInDown {
  from {
    transform: rotateX(-90deg);
    opacity: 0;
  }

  to {
    transform: rotateX(0deg);
    opacity: 1;
  }
}

/* 渐变文字（多色动画）需配合 Tailwind bg-clip-text */
.text-gradient-animate {
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {

  0%,
  100% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }
}

/* 进入动画初始状态 */
.fade-in {
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 进入可见 */
.fade-in.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}