/* ========================================
   Scroll Animations
   ======================================== */
.fade-in {
   opacity: 0;
   transform: translateY(30px);
   transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

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

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

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

/* ========================================
   Stagger Animations
   ======================================== */
.stagger-item {
   opacity: 0;
   transform: translateY(20px);
}

.stagger-item.visible {
   animation: staggerFadeIn 0.5s ease forwards;
}

@keyframes staggerFadeIn {
   to {
      opacity: 1;
      transform: translateY(0);
   }
}

/* ========================================
   Hero Animations
   ======================================== */
.hero-content {
   animation: heroFadeIn 1s ease 0.3s forwards;
   opacity: 0;
}

@keyframes heroFadeIn {
   from {
      opacity: 0;
      transform: translateY(30px);
   }

   to {
      opacity: 1;
      transform: translateY(0);
   }
}

.hero-avatar {
   animation: avatarPulse 3s ease-in-out infinite;
}

@keyframes avatarPulse {

   0%,
   100% {
      box-shadow: 0 0 40px rgba(23, 247, 0, 0.2);
   }

   50% {
      box-shadow: 0 0 60px rgba(23, 247, 0, 0.4);
   }
}

/* ========================================
   Card Hover Effects
   ======================================== */
.research-card {
   position: relative;
   overflow: hidden;
}

.research-card::before {
   content: '';
   position: absolute;
   top: 0;
   left: -100%;
   width: 100%;
   height: 100%;
   background: linear-gradient(90deg,
         transparent,
         rgba(23, 247, 0, 0.05),
         transparent);
   transition: left 0.5s ease;
}

.research-card:hover::before {
   left: 100%;
}

/* ========================================
   Link Underline Animation
   ======================================== */
.animated-link {
   position: relative;
   display: inline-block;
}

.animated-link::after {
   content: '';
   position: absolute;
   bottom: -2px;
   left: 0;
   width: 0;
   height: 1px;
   background: var(--accent-primary);
   transition: width 0.3s ease;
}

.animated-link:hover::after {
   width: 100%;
}

/* ========================================
   Button Ripple Effect
   ======================================== */
.ripple {
   position: relative;
   overflow: hidden;
}

.ripple::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   width: 0;
   height: 0;
   background: rgba(255, 255, 255, 0.2);
   border-radius: 50%;
   transform: translate(-50%, -50%);
   transition: width 0.6s ease, height 0.6s ease;
}

.ripple:active::after {
   width: 200px;
   height: 200px;
}

/* ========================================
   Loading Animation
   ======================================== */
.loading-skeleton {
   background: linear-gradient(90deg,
         var(--bg-card) 25%,
         var(--bg-card-hover) 50%,
         var(--bg-card) 75%);
   background-size: 200% 100%;
   animation: shimmer 1.5s infinite;
}

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

   100% {
      background-position: 200% 0;
   }
}

/* ========================================
   Text Gradient Animation
   ======================================== */
.gradient-text-animated {
   background: linear-gradient(90deg,
         #17f700,
         #00d4ff,
         #17f700);
   background-size: 200% auto;
   -webkit-background-clip: text;
   -webkit-text-fill-color: transparent;
   background-clip: text;
   animation: gradientFlow 3s linear infinite;
}

@keyframes gradientFlow {
   0% {
      background-position: 0% center;
   }

   100% {
      background-position: 200% center;
   }
}

/* ========================================
   Section Divider Animation
   ======================================== */
.section-divider {
   width: 60px;
   height: 3px;
   background: var(--accent-gradient);
   margin: 24px auto;
   position: relative;
   overflow: hidden;
}

.section-divider::after {
   content: '';
   position: absolute;
   top: 0;
   left: -100%;
   width: 100%;
   height: 100%;
   background: linear-gradient(90deg,
         transparent,
         rgba(255, 255, 255, 0.4),
         transparent);
   animation: shine 2s infinite;
}

@keyframes shine {
   0% {
      left: -100%;
   }

   100% {
      left: 100%;
   }
}

/* ========================================
   Floating Animation
   ======================================== */
.floating {
   animation: floating 3s ease-in-out infinite;
}

@keyframes floating {

   0%,
   100% {
      transform: translateY(0);
   }

   50% {
      transform: translateY(-10px);
   }
}

/* ========================================
   Icon Rotate on Hover
   ======================================== */
.icon-rotate:hover i {
   transform: rotate(360deg);
   transition: transform 0.5s ease;
}

/* ========================================
   Publication Item Animation
   ======================================== */
/* 左侧边框动画已禁用，因为与滚动容器冲突 */

/* ========================================
   Smooth Appear
   ======================================== */
@keyframes smoothAppear {
   from {
      opacity: 0;
      filter: blur(10px);
   }

   to {
      opacity: 1;
      filter: blur(0);
   }
}

.smooth-appear {
   animation: smoothAppear 0.8s ease forwards;
}