/* Animation System */

/* ===== 关键帧动画定义 ===== */

/* 淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* 从下方滑入 */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 从左侧滑入 */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 从右侧滑入 */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 缩放进入 */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* 打字机效果 */
@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* 光标闪烁 */
@keyframes blink {
  0%, 50% {
    border-color: transparent;
  }
  51%, 100% {
    border-color: var(--color-accent);
  }
}

/* 浮动动画 */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 脉冲动画 */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* 旋转动画 */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* 弹跳动画 */
@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    animation-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1.000);
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
    transform: translate3d(0, -30px, 0);
  }
  70% {
    animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

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

/* 渐变背景动画 */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ===== 页面加载动画类 ===== */

/* 页面整体淡入 */
.page-fade-in {
  animation: fadeIn var(--duration-slow) var(--ease-out);
}

/* 页面加载时的遮罩动画 */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-background);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

.page-loader.fade-out {
  animation: fadeIn var(--duration-normal) var(--ease-out) reverse;
  pointer-events: none;
}

/* 加载指示器 */
.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: 50%;
  animation: spin var(--duration-1000) linear infinite;
}

/* ===== 元素进入动画类 ===== */

/* 基础淡入动画 */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--duration-normal) var(--ease-out) forwards;
}

.fade-in-slow {
  opacity: 0;
  animation: fadeIn var(--duration-slow) var(--ease-out) forwards;
}

.fade-in-fast {
  opacity: 0;
  animation: fadeIn var(--duration-fast) var(--ease-out) forwards;
}

/* 滑入动画 */
.slide-up {
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp var(--duration-normal) var(--ease-out) forwards;
}

.slide-up-slow {
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp var(--duration-slow) var(--ease-out) forwards;
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  animation: slideInLeft var(--duration-normal) var(--ease-out) forwards;
}

.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  animation: slideInRight var(--duration-normal) var(--ease-out) forwards;
}

/* 缩放动画 */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  animation: scaleIn var(--duration-normal) var(--ease-out) forwards;
}

/* 延迟动画类 */
.delay-100 {
  animation-delay: 100ms;
}

.delay-200 {
  animation-delay: 200ms;
}

.delay-300 {
  animation-delay: 300ms;
}

.delay-500 {
  animation-delay: 500ms;
}

.delay-700 {
  animation-delay: 700ms;
}

.delay-1000 {
  animation-delay: 1000ms;
}

/* ===== 交互动画类 ===== */

/* 悬停效果 */
.hover-lift {
  transition: transform var(--duration-fast) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

.hover-scale {
  transition: transform var(--duration-fast) var(--ease-out);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow var(--duration-fast) var(--ease-out);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(184, 134, 11, 0.3);
}

/* 增强的交互效果 */
.interactive-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.interactive-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.interactive-button {
  position: relative;
  overflow: hidden;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.interactive-button:hover {
  transform: scale(1.05);
}

.interactive-button:active {
  transform: scale(0.95);
}

/* 波纹效果 */
@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

.ripple-effect {
  position: relative;
  overflow: hidden;
}

/* 点击反馈 */
.clicked {
  transform: scale(0.95);
  transition: transform 0.1s ease;
}

/* 抖动效果 */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
  animation: shake 0.5s ease-in-out;
}

/* 按钮动画 */
.btn-animate {
  position: relative;
  overflow: hidden;
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-animate::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 var(--duration-normal) var(--ease-out);
}

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

/* ===== 视差滚动动画类 ===== */

/* 视差容器 */
.parallax-container {
  overflow: hidden;
  position: relative;
}

/* 视差元素 */
.parallax-element {
  will-change: transform;
  transition: transform 0.1s linear;
}

/* 视差背景 */
.parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 120%;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  will-change: transform;
}

/* 视差文本 */
.parallax-text {
  position: relative;
  z-index: var(--z-10);
  will-change: transform;
}

/* ===== 滚动触发动画类 ===== */

/* 滚动时显示的元素 */
.scroll-reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all var(--duration-slow) var(--ease-out);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 增强的滚动触发动画 */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-left.animate {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-right.animate {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 滚动时的视差效果 */
.scroll-parallax {
  will-change: transform;
  transition: transform 0.1s linear;
}

/* ===== 特殊效果动画 ===== */

/* 打字机效果 */
.typewriter {
  overflow: hidden;
  border-right: 2px solid var(--color-accent);
  white-space: nowrap;
  animation: 
    typewriter var(--duration-1000) steps(40, end),
    blink var(--duration-700) infinite;
}

/* 浮动效果 */
.floating {
  animation: float 3s ease-in-out infinite;
}

/* 脉冲效果 */
.pulsing {
  animation: pulse 2s ease-in-out infinite;
}

/* 渐变背景动画 */
.gradient-animate {
  background: linear-gradient(-45deg, var(--color-accent), var(--color-accent-light), var(--color-accent-dark), var(--color-accent));
  background-size: 400% 400%;
  animation: gradientShift 4s ease infinite;
}

/* ===== 页面切换动画 ===== */

/* 页面切换容器 */
.page-transition {
  position: relative;
  overflow: hidden;
}

/* 页面淡出 */
.page-fade-out {
  animation: fadeIn var(--duration-normal) var(--ease-out) reverse;
}

/* 页面滑动切换 */
.page-slide-left {
  animation: slideInLeft var(--duration-normal) var(--ease-out) reverse;
}

.page-slide-right {
  animation: slideInRight var(--duration-normal) var(--ease-out) reverse;
}

/* ===== 响应式动画控制 ===== */

/* 移动端减少动画 */
@media (max-width: 767px) {
  .mobile-no-animation {
    animation: none !important;
    transition: none !important;
  }
  
  /* 移动端简化动画 */
  .fade-in,
  .slide-up,
  .scale-in {
    animation-duration: var(--duration-fast);
  }
}

/* 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;
    scroll-behavior: auto !important;
  }
  
  .parallax-element,
  .parallax-bg,
  .scroll-parallax {
    transform: none !important;
  }
}

/* ===== 动画工具类 ===== */

/* 动画暂停 */
.animation-paused {
  animation-play-state: paused;
}

/* 动画运行 */
.animation-running {
  animation-play-state: running;
}

/* 无限循环动画 */
.animate-infinite {
  animation-iteration-count: infinite;
}

/* 动画填充模式 */
.animate-forwards {
  animation-fill-mode: forwards;
}

.animate-backwards {
  animation-fill-mode: backwards;
}

.animate-both {
  animation-fill-mode: both;
}

/* 硬件加速 */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
}

/* 平滑过渡 */
.smooth-transition {
  transition: all var(--duration-normal) var(--ease-out);
}

.smooth-transition-fast {
  transition: all var(--duration-fast) var(--ease-out);
}

.smooth-transition-slow {
  transition: all var(--duration-slow) var(--ease-out);
}
/* ===
== 表单交互动画 ===== */

/* 输入框焦点效果 */
.input-group {
  position: relative;
  transition: all 0.3s ease;
}

.input-group.focused .input-label {
  color: var(--color-accent);
  transform: translateY(-20px) scale(0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.input-group.filled .input-label {
  transform: translateY(-20px) scale(0.8);
}

.input-group.error .input-field {
  border-color: #e74c3c;
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2);
  animation: shake 0.5s ease-in-out;
}

.input-field {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.input-field:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(184, 134, 11, 0.2);
  outline: none;
}

/* ===== 导航动画 ===== */

/* 移动端导航切换 */
.nav-overlay {
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.nav-toggle {
  transition: all 0.3s ease;
}

.nav-toggle-line {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-toggle.active .nav-toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* 导航链接悬停效果 */
.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== 响应式图片动画 ===== */

/* 懒加载图片 */
img[data-src] {
  opacity: 0;
  transition: opacity 0.3s ease;
  filter: blur(5px);
}

img[data-src].loaded {
  opacity: 1;
  filter: blur(0);
}

/* 图片悬停效果 */
.image-hover-zoom {
  overflow: hidden;
}

.image-hover-zoom img {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-hover-zoom:hover img {
  transform: scale(1.1);
}

/* ===== 滚动进度条 ===== */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  z-index: var(--z-fixed);
  transition: width 0.1s linear;
}

/* ===== 计数器动画 ===== */

.counter {
  font-variant-numeric: tabular-nums;
  transition: all 0.3s ease;
}

.counter.animate {
  color: var(--color-accent);
}

/* ===== 进度条动画 ===== */

.progress-bar {
  position: relative;
  background-color: var(--color-surface);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: 10px;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar.animate::before {
  width: var(--progress, 0%);
}

/* ===== 卡片动画增强 ===== */

.blog-post-card,
.portfolio-card,
.resource-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.blog-post-card:hover,
.portfolio-card:hover,
.resource-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 按钮增强动画 */
.btn {
  position: relative;
  overflow: hidden;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn:active {
  transform: scale(0.95);
}

/* 加载状态动画 */
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top: 2px solid var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--color-text-muted);
}

/* ===== 错误和成功状态动画 ===== */

.error-state,
.success-state {
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  animation: slideUp 0.3s ease-out;
}

.error-state {
  background-color: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  color: #e74c3c;
}

.success-state {
  background-color: rgba(46, 204, 113, 0.1);
  border: 1px solid rgba(46, 204, 113, 0.3);
  color: #2ecc71;
}

/* ===== 工具提示动画 ===== */

.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-text-primary);
  color: var(--color-background);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: var(--z-tooltip);
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-5px);
}

/* ===== 性能优化 ===== */

/* 硬件加速优化 */
.gpu-optimized {
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
  perspective: 1000px;
}

/* 动画性能优化 */
@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .slide-in-left,
  .slide-in-right,
  .scale-in,
  .interactive-card,
  .interactive-button {
    animation: none !important;
    transition: none !important;
  }
  
  .parallax-element,
  .parallax-bg,
  .parallax-text {
    transform: none !important;
  }
}

/* 移动端优化 */
@media (max-width: 768px) {
  .fade-in-up,
  .slide-in-left,
  .slide-in-right,
  .scale-in {
    animation-duration: 0.3s;
  }
  
  .interactive-card:hover,
  .blog-post-card:hover,
  .portfolio-card:hover,
  .resource-card:hover {
    transform: none;
    box-shadow: none;
  }
  
  .parallax-element,
  .parallax-bg,
  .parallax-text {
    transform: none !important;
  }
}