/* ========================================
   动画与过渡效果
   ======================================== */

/* === 滚动进入动画 === */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* 方向变体 */
.animate-fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.animate-fade-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.animate-fade-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.animate-fade-in {
  opacity: 0;
  transition: opacity 0.7s ease;
}

.animate-fade-in.animate-in {
  opacity: 1;
}

.animate-scale-up {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

/* 延迟变体（用于卡片列表） */
.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; }
.animate-delay-6 { transition-delay: 0.6s; }

/* === 页面加载动画 === */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

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

/* === Hero 区域粒子/网格背景 === */
.grid-bg {
  background-image:
    linear-gradient(var(--color-grid-bg) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-bg) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 科技感扫描线效果 */
@keyframes scanLine {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

.scan-effect::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(21,87,204,0.4), transparent);
  animation: scanLine 4s linear infinite;
  pointer-events: none;
}

/* 发光效果 */
.glow-blue {
  box-shadow: 0 0 20px rgba(21,87,204,0.3), 0 0 40px rgba(21,87,204,0.15);
}

.glow-red {
  box-shadow: 0 0 20px rgba(229,37,46,0.3), 0 0 40px rgba(229,37,46,0.15);
}

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

.float-animation {
  animation: float 3s ease-in-out infinite;
}

/* === 倒计时数字 === */
.countdown {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
}

.countdown__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  min-width: 80px;
}

.countdown__number {
  font-size: 56px;
  font-weight: var(--font-weight-bold);
  color: #fff;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  background: rgba(255,255,255,0.12);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.2);
  min-width: 88px;
  text-align: center;
  letter-spacing: -1px;
  position: relative;
  overflow: hidden;
}

.countdown__number::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(0,0,0,0.15);
}

.countdown__label {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.65);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
}

.countdown__sep {
  font-size: 48px;
  font-weight: bold;
  color: rgba(255,255,255,0.4);
  line-height: 1;
  align-self: flex-start;
  padding-top: var(--space-4);
}

/* 翻页动画 */
@keyframes flipIn {
  0% {
    transform: rotateX(-90deg);
    opacity: 0;
  }
  100% {
    transform: rotateX(0deg);
    opacity: 1;
  }
}

.countdown__number.flip {
  animation: flipIn 0.3s ease;
}

/* === 数字计数动画 === */
.counter-value {
  font-variant-numeric: tabular-nums;
  will-change: contents;
}

/* === 图片悬停遮罩 === */
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,31,92,0.85) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item:hover .gallery-item__overlay {
  opacity: 1;
}

.gallery-item__caption {
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transform: translateY(10px);
  transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-item__caption {
  transform: translateY(0);
}

/* 放大图标 */
.gallery-item__zoom {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.9);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-spring);
  font-size: var(--font-size-xl);
  color: var(--color-navy);
}

.gallery-item:hover .gallery-item__zoom {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* === 骨架屏加载 === */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-gray) 25%, #e0e0e0 50%, var(--color-bg-gray) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* === 进度条 === */
.progress {
  width: 100%;
  height: 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-blue) 0%, var(--color-blue-mid) 100%);
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

/* === 粒子装饰（Hero区） === */
.particle {
  position: absolute;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  animation: particleFloat 8s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% {
    transform: translateY(0) translateX(0) rotate(0deg);
    opacity: 0.3;
  }
  25% {
    transform: translateY(-20px) translateX(10px) rotate(90deg);
    opacity: 0.6;
  }
  50% {
    transform: translateY(-10px) translateX(-5px) rotate(180deg);
    opacity: 0.4;
  }
  75% {
    transform: translateY(-30px) translateX(15px) rotate(270deg);
    opacity: 0.5;
  }
}

/* === 响应式 === */
@media (max-width: 768px) {
  .countdown {
    gap: var(--space-3);
  }

  .countdown__number {
    font-size: 36px;
    min-width: 66px;
    padding: var(--space-3) var(--space-4);
  }

  .countdown__sep {
    font-size: 32px;
    padding-top: var(--space-3);
  }
}

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

  .animate-on-scroll,
  .animate-fade-up,
  .animate-fade-left,
  .animate-fade-right,
  .animate-fade-in,
  .animate-scale-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
}