/* 页面入场动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 滚动触发动画类 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slower) var(--ease-out),
                transform var(--transition-slower) var(--ease-out);
    will-change: opacity, transform;
}

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

/* 错落动画延迟 */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* 页面加载动画 */
.page-loaded .hero-title {
    animation: fadeInUp 0.6s var(--ease-out) forwards;
    will-change: opacity, transform;
}

.page-loaded .hero-subtitle {
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease-out) 0.15s forwards;
    will-change: opacity, transform;
}

.page-loaded .hero-actions {
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease-out) 0.3s forwards;
    will-change: opacity, transform;
}

.page-loaded .hero-card {
    opacity: 0;
    animation: scaleIn 0.6s var(--ease-spring) 0.45s forwards;
    will-change: opacity, transform;
}

/* 卡片列表入场动画 */
.games-grid .game-card {
    opacity: 0;
    transform: translateY(20px);
    will-change: opacity, transform;
}

.games-grid.animated .game-card {
    animation: fadeInUp 0.4s var(--ease-out) forwards;
}

.games-grid.animated .game-card:nth-child(1) { animation-delay: 0.03s; }
.games-grid.animated .game-card:nth-child(2) { animation-delay: 0.06s; }
.games-grid.animated .game-card:nth-child(3) { animation-delay: 0.09s; }
.games-grid.animated .game-card:nth-child(4) { animation-delay: 0.12s; }
.games-grid.animated .game-card:nth-child(5) { animation-delay: 0.15s; }
.games-grid.animated .game-card:nth-child(6) { animation-delay: 0.18s; }
.games-grid.animated .game-card:nth-child(7) { animation-delay: 0.21s; }
.games-grid.animated .game-card:nth-child(8) { animation-delay: 0.24s; }

/* 按钮点击动画 */
.btn-click-effect {
    position: relative;
    overflow: hidden;
}

.btn-click-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s var(--ease-out), height 0.4s var(--ease-out);
}

.btn-click-effect:active::after {
    width: 200%;
    height: 200%;
}

/* 收藏按钮动画 */
@keyframes heartBeat {
    0% { transform: scale(1); }
    25% { transform: scale(1.2); }
    50% { transform: scale(1); }
    75% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.game-favorite-btn.active svg {
    animation: heartBeat 0.3s var(--ease-spring);
    will-change: transform;
}

/* 标签切换动画 */
.category-btn {
    position: relative;
    overflow: hidden;
    transition: color var(--transition-fast) var(--ease-out);
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-brand), var(--color-brand-light));
    opacity: 0;
    transform: scaleX(0.95);
    transform-origin: left;
    transition: opacity var(--transition-fast) var(--ease-out), transform var(--transition-fast) var(--ease-out);
    z-index: -1;
}

.category-btn.active::before {
    opacity: 1;
    transform: scaleX(1);
}

/* 搜索框展开动画 */
.search-input {
    transition: width var(--transition-slow) var(--ease-out),
                background-color var(--transition-fast),
                border-color var(--transition-fast),
                box-shadow var(--transition-fast);
    will-change: width;
}

/* 导航链接下划线动画 */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-brand);
    transition: width var(--transition-fast) var(--ease-out), left var(--transition-fast) var(--ease-out);
    will-change: width, left;
}

.nav-link:hover::after {
    width: calc(100% - 32px);
    left: 16px;
}

.nav-link.active::after {
    display: none;
}

/* 图片悬停缩放 */
.game-cover img {
    transition: transform var(--transition-slow) var(--ease-out);
    will-change: transform;
}

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

/* 卡片阴影过渡 */
.game-card {
    transition: transform var(--transition-slow) var(--ease-out),
                box-shadow var(--transition-slow) var(--ease-out),
                border-color var(--transition-fast);
    will-change: transform, box-shadow;
    transform-style: preserve-3d;
}

.game-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

/* 标题动画 */
.game-title {
    transition: color var(--transition-fast) var(--ease-out),
                transform var(--transition-fast) var(--ease-out);
    will-change: color, transform;
}

.game-card:hover .game-title {
    color: var(--color-brand);
    transform: translateY(-2px);
}

/* 按钮悬停动画 */
.btn {
    transition: all var(--transition-fast) var(--ease-out);
    will-change: transform, box-shadow;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

/* 加载动画 */
@keyframes loadingPulse {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 1;
    }
}

.loading-pulse {
    animation: loadingPulse 1.5s ease-in-out infinite;
}

/* 骨架屏动画优化 */
.skeleton {
    position: relative;
    overflow: hidden;
}

.skeleton::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: shimmer 1.5s infinite;
}

/* Toast提示动画 */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

@keyframes slideOutUp {
    from {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}

.toast {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-text-primary);
    color: white;
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-tooltip);
    animation: slideInDown 0.3s var(--ease-out);
}

.toast.hiding {
    animation: slideOutUp 0.3s var(--ease-out) forwards;
}

/* 模态框动画 */
@keyframes modalBackdropIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalContentIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-backdrop {
    animation: modalBackdropIn 0.2s var(--ease-out);
}

.modal-content {
    animation: modalContentIn 0.3s var(--ease-spring);
}

/* 页面切换过渡 */
.page-transition {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.page-transition.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* 游戏网格过渡 */
.games-grid {
    transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
    will-change: opacity, transform;
}

/* 图标微动效 */
.icon-hover-effect {
    transition: transform var(--transition-fast);
}

.icon-hover-effect:hover {
    transform: scale(1.1) rotate(5deg);
}

/* 链接下划线动画 */
.link-underline {
    position: relative;
}

.link-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width var(--transition-fast);
}

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

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(22, 93, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(22, 93, 255, 0);
    }
}

.pulse-animation {
    animation: pulse 2s infinite;
}

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

.spin-animation {
    animation: spin 1s linear infinite;
}

/* 弹跳动画 */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.bounce-animation {
    animation: bounce 1s ease-in-out infinite;
}

/* 摇晃动画 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake-animation {
    animation: shake 0.3s ease-in-out;
}