/* ===== UI增强 - 微交互和动画效果 ===== */

/* ===== 平滑进入动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ===== 卡片悬浮增强 ===== */
.card {
  animation: fadeInUp 0.6s ease-out backwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }

/* 特色卡片额外效果 */
.feature-card {
  position: relative;
  overflow: visible;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0;
  border-radius: inherit;
  z-index: -1;
  filter: blur(20px);
  transition: opacity var(--transition-base);
}

.feature-card:hover::after {
  opacity: 0.2;
}

/* ===== 按钮涟漪效果 ===== */
.btn {
  position: relative;
  overflow: hidden;
}

.btn.ripple-effect::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn.ripple-effect:active::after {
  width: 300px;
  height: 300px;
}

/* ===== 输入框焦点增强 ===== */
.form-input,
.form-textarea,
.form-select {
  position: relative;
}

.form-group {
  position: relative;
}

.form-input:focus ~ .form-label,
.form-textarea:focus ~ .form-label {
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* 悬浮标签效果 */
.form-group.floating-label {
  position: relative;
  margin-top: 1.5rem;
}

.form-group.floating-label .form-label {
  position: absolute;
  top: 0.875rem;
  left: 1rem;
  background: var(--bg-primary);
  padding: 0 0.5rem;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  pointer-events: none;
}

.form-group.floating-label .form-input:focus ~ .form-label,
.form-group.floating-label .form-input:not(:placeholder-shown) ~ .form-label {
  top: -0.5rem;
  font-size: 0.875rem;
  color: var(--primary-color);
}

/* ===== 加载骨架屏 ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 0%,
    var(--bg-secondary) 50%,
    var(--bg-tertiary) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: 0.75rem;
}

.skeleton-title {
  height: 1.5rem;
  width: 60%;
  margin-bottom: 1rem;
}

/* ===== 进度条 ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: inherit;
  transition: width var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

/* ===== 工具提示 ===== */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: 0.5rem 1rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  pointer-events: none;
  z-index: 1000;
}

.tooltip::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  pointer-events: none;
}

.tooltip:hover::before,
.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-12px);
}

.tooltip:hover::after {
  transform: translateX(-50%) translateY(-6px);
}

/* ===== 脉冲动画徽章 ===== */
.badge.pulse {
  animation: pulse 2s ease-in-out infinite;
}

.badge-with-dot {
  position: relative;
  padding-left: 1.5rem;
}

.badge-with-dot::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

/* ===== 图标旋转效果 ===== */
.icon-spin {
  animation: spin 2s linear infinite;
}

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

/* ===== 滚动显示动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 悬浮卡片阴影变化 ===== */
.card-hover-lift {
  transition: all var(--transition-base);
}

.card-hover-lift:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

/* ===== 图片悬停缩放 ===== */
.img-zoom {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.img-zoom img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

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

/* ===== 文字渐变动画 ===== */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

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

/* ===== 数字滚动动画 ===== */
.counter {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

/* ===== 标签页切换动画 ===== */
.tab-content {
  animation: fadeInScale 0.4s ease-out;
}

/* ===== 列表项动画 ===== */
.animated-list > * {
  opacity: 0;
  animation: fadeInUp 0.5s ease-out forwards;
}

.animated-list > *:nth-child(1) { animation-delay: 0.1s; }
.animated-list > *:nth-child(2) { animation-delay: 0.2s; }
.animated-list > *:nth-child(3) { animation-delay: 0.3s; }
.animated-list > *:nth-child(4) { animation-delay: 0.4s; }
.animated-list > *:nth-child(5) { animation-delay: 0.5s; }

/* ===== 成功/错误状态动画 ===== */
.success-checkmark {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--success-color);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: scaleIn 0.5s ease-out;
}

.success-checkmark::after {
  content: '✓';
  color: white;
  font-size: 2rem;
  font-weight: bold;
  animation: fadeIn 0.3s ease-out 0.3s backwards;
}

@keyframes scaleIn {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== 波纹背景效果 ===== */
.ripple-background {
  position: relative;
  overflow: hidden;
}

.ripple-background::before,
.ripple-background::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  animation: ripple 15s ease-in-out infinite;
  opacity: 0.3;
}

.ripple-background::before {
  top: -250px;
  right: -250px;
}

.ripple-background::after {
  bottom: -250px;
  left: -250px;
  animation-delay: 7.5s;
}

@keyframes ripple {
  0%, 100% {
    transform: scale(1);
    opacity: 0.3;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.5;
  }
}

/* ===== 闪烁高亮效果 ===== */
.highlight-flash {
  animation: flash 1.5s ease-in-out;
}

@keyframes flash {
  0%, 100% {
    background-color: transparent;
  }
  50% {
    background-color: var(--primary-glow);
  }
}

/* ===== 震动效果 ===== */
.shake {
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-10px);
  }
  75% {
    transform: translateX(10px);
  }
}

/* ===== 打字机效果 ===== */
.typewriter {
  overflow: hidden;
  border-right: 2px solid var(--primary-color);
  white-space: nowrap;
  animation: typing 3s steps(40) 1s forwards, blink 0.75s step-end infinite;
}

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

@keyframes blink {
  50% {
    border-color: transparent;
  }
}

/* ===== 弹跳箭头 ===== */
.bounce-arrow {
  animation: bounce 2s ease-in-out infinite;
}

/* ===== 3D翻转卡片 ===== */
.flip-card {
  perspective: 1000px;
  height: 300px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.flip-card-front {
  background: var(--card-gradient);
  border: 1px solid var(--border-light);
}

.flip-card-back {
  background: var(--primary-gradient);
  color: white;
  transform: rotateY(180deg);
}

/* ===== 悬浮按钮 ===== */
.floating-action-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  z-index: 100;
}

.floating-action-btn:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ===== 滚动进度条 ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--primary-gradient);
  z-index: 9999;
  transition: width var(--transition-fast);
}

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
  .floating-action-btn {
    bottom: 1rem;
    right: 1rem;
    width: 48px;
    height: 48px;
  }
  
  .tooltip::before {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
  }
}

/* ===== 暗黑模式下的微调 ===== */
[data-theme="dark"] .success-checkmark {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

[data-theme="dark"] .skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 0%,
    var(--bg-primary) 50%,
    var(--bg-tertiary) 100%
  );
  background-size: 1000px 100%;
}

/* ===== 可访问性增强 ===== */
.focus-visible:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}