/**
 * Butterfly Style Effects CSS
 * 复制butterfly主题的动画效果样式
 */

/* 爱心飘浮动画 */
@keyframes heartFloat {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translateY(-30px) scale(1.2);
  }
  100% {
    opacity: 0;
    transform: translateY(-60px) scale(0.8);
  }
}

/* 粒子飘浮动画 */
@keyframes particleFloat {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-50px) scale(0);
  }
}

/* 震动动画 */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
  20%, 40%, 60%, 80% { transform: translateX(2px); }
}

/* 预加载器样式 */
.preloader-spinner .spinner-border {
  width: 3rem;
  height: 3rem;
  border: 0.25em solid transparent;
  border-top: 0.25em solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.preloader-dots {
  display: flex;
  gap: 0.5rem;
}

.preloader-dots .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite both;
}

.preloader-dots .dot:nth-child(1) { animation-delay: -0.32s; }
.preloader-dots .dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes dotPulse {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.preloader-wave {
  display: flex;
  gap: 0.2rem;
  align-items: end;
}

.preloader-wave .wave-bar {
  width: 4px;
  height: 20px;
  animation: waveStretch 1.2s ease-in-out infinite;
}

.preloader-wave .wave-bar:nth-child(1) { animation-delay: -1.1s; }
.preloader-wave .wave-bar:nth-child(2) { animation-delay: -1.0s; }
.preloader-wave .wave-bar:nth-child(3) { animation-delay: -0.9s; }
.preloader-wave .wave-bar:nth-child(4) { animation-delay: -0.8s; }

@keyframes waveStretch {
  0%, 40%, 100% {
    transform: scaleY(0.4);
  }
  20% {
    transform: scaleY(1);
  }
}

/* Butterfly风格的滚动动画 */
.btf-fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.btf-fade-in.btf-show {
  opacity: 1;
  transform: translateY(0);
}

.btf-fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease;
}

.btf-fade-in-left.btf-show {
  opacity: 1;
  transform: translateX(0);
}

.btf-fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s ease;
}

.btf-fade-in-right.btf-show {
  opacity: 1;
  transform: translateX(0);
}

.btf-fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.btf-fade-in-up.btf-show {
  opacity: 1;
  transform: translateY(0);
}

.btf-fade-in-down {
  opacity: 0;
  transform: translateY(-30px);
  transition: all 0.6s ease;
}

.btf-fade-in-down.btf-show {
  opacity: 1;
  transform: translateY(0);
}

.btf-scale-in {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.6s ease;
}

.btf-scale-in.btf-show {
  opacity: 1;
  transform: scale(1);
}

/* 卡片悬停效果 */
.btf-card {
  transition: all 0.3s ease;
  transform: translateY(0);
}

.btf-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(102, 126, 234, 0.15);
}

/* 按钮动画效果 */
.btf-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btf-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btf-btn:hover::before {
  left: 100%;
}

/* 文字打字机效果 */
.btf-typewriter {
  overflow: hidden;
  border-right: 2px solid var(--primary-color);
  white-space: nowrap;
  animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--primary-color); }
}

/* 脉冲动画 */
.btf-pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* 旋转动画 */
.btf-rotate {
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 弹跳动画 */
.btf-bounce {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

/* 渐变背景动画 */
.btf-gradient-bg {
  background: linear-gradient(-45deg, #667eea, #764ba2, #667eea, #764ba2);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* 发光效果 */
.btf-glow {
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
  }
  to {
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.6);
  }
}

/* 延迟动画类 */
.btf-delay-1 { animation-delay: 0.1s; }
.btf-delay-2 { animation-delay: 0.2s; }
.btf-delay-3 { animation-delay: 0.3s; }
.btf-delay-4 { animation-delay: 0.4s; }
.btf-delay-5 { animation-delay: 0.5s; }
.btf-delay-6 { animation-delay: 0.6s; }

/* 响应式动画控制 */
@media (max-width: 768px) {
  .btf-fade-in,
  .btf-fade-in-left,
  .btf-fade-in-right,
  .btf-fade-in-up,
  .btf-fade-in-down,
  .btf-scale-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
  
  .btf-typewriter {
    animation: none;
    border-right: none;
    white-space: normal;
  }
}

/* 减少动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}