/* ========================================
   数慧时空世界大模型 - 动画库
   ======================================== */

/* === 基础动画类 === */

/* 淡入上移 */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 淡入下移 */
.fade-in-down {
  opacity: 0;
  transform: translateY(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 淡入左 */
.fade-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 淡入右 */
.fade-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 缩放淡入 */
.scale-in {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 交错显示 - 子元素延迟 */
.stagger-children > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.08s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.16s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.24s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.32s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.4s; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 0.48s; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 0.56s; }
.stagger-children.visible > *:nth-child(9) { transition-delay: 0.64s; }
.stagger-children.visible > *:nth-child(10) { transition-delay: 0.72s; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* === 关键帧动画 === */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(108, 99, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(108, 99, 255, 0.5), 0 0 80px rgba(0, 212, 255, 0.2);
  }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes borderGlow {
  0%, 100% {
    border-color: rgba(108, 99, 255, 0.3);
  }
  50% {
    border-color: rgba(108, 99, 255, 0.7), rgba(0, 212, 255, 0.5);
  }
}

@keyframes textShimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes rotate360 {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes bounceSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

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

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes typingDot {
  0%, 80%, 100% { 
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% { 
    opacity: 1;
    transform: scale(1);
  }
}

/* === 数字滚动计数器动画 === */
.count-up {
  display: inline-block;
  font-feature-settings: 'tnum';
  font-variant-numeric: tabular-nums;
}

/* === 进度条动画 === */
.progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 10px;
  background: var(--gradient-primary);
  width: 0;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 60px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
  animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
  0% { transform: translateX(-60px); }
  100% { transform: translateX(60px); }
}

/* === 加载骨架屏 === */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.08) 50%,
    rgba(255,255,255,0.04) 75%
  );
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s ease-in-out infinite;
  border-radius: 8px;
}

@keyframes skeletonPulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === 文字打字效果容器 === */
.typewriter-text {
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--secondary);
  animation: typing 3s steps(30, end), blinkCaret 0.8s step-end infinite;
}

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

@keyframes blinkCaret {
  from, to { border-color: transparent; }
  50% { border-color: var(--secondary); }
}

/* === 磁性按钮效果 === */
.magnetic-btn {
  position: relative;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.magnetic-btn::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: var(--gradient-primary);
  opacity: 0;
  filter: blur(15px);
  z-index: -1;
  transition: opacity 0.3s ease;
}

.magnetic-btn:hover::before {
  opacity: 0.5;
}

/* === 卡片悬停特效 === */
.card-glow-effect {
  position: relative;
  overflow: hidden;
}

.card-glow-effect::after {
  content: '';
  position: absolute;
  top: var(--mouse-y, 50%);
  left: var(--mouse-x, 50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(108,99,255,0.12) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: opacity 0.3s ease;
  opacity: 0;
}

.card-glow-effect:hover::after {
  opacity: 1;
}

/* === 图片悬停缩放 === */
.img-zoom-wrapper {
  overflow: hidden;
}

.img-zoom-wrapper img,
.img-zoom-wrapper .img-content {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.img-zoom-wrapper:hover img,
.img-zoom-wrapper:hover .img-content {
  transform: scale(1.08);
}

/* === 渐变边框动画 === */
.animated-border {
  position: relative;
  border-radius: var(--radius-lg);
}

.animated-border::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: conic-gradient(from var(--border-angle, 0deg), var(--primary), var(--secondary), var(--accent), var(--primary));
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  animation: borderSpin 4s linear infinite;
}

@keyframes borderSpin {
  to { --border-angle: 360deg; }
}

@property --border-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

/* === 波纹点击反馈 === */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transform: scale(0);
  animation: rippleEffect 0.6s linear;
  pointer-events: none;
}

@keyframes rippleEffect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* === 滚动指示器 === */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  animation: fadeInDown 1s ease 1s both;
}

.scroll-mouse {
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 14px;
  position: relative;
}

.scroll-dot {
  width: 4px; height: 8px;
  background: var(--primary-light);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 22px; opacity: 0.3; }
}

.scroll-text {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* === 页面加载动画 === */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 52px; height: 52px;
  border: 3px solid rgba(108, 99, 255, 0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: loaderSpin 0.9s linear infinite;
}

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

.loader-dots {
  display: flex;
  gap: 8px;
  align-items: center;
}

.loader-dot {
  width: 10px; height: 10px;
  background: var(--primary);
  border-radius: 50%;
  animation: dotBounce 1.4s ease-in-out infinite;
}

.loader-dot:nth-child(2) { animation-delay: 0.16s; }
.loader-dot:nth-child(3) { animation-delay: 0.32s; }

@keyframes dotBounce {
  0%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}