/* 动画效果 - 优化版，参考Dinolingo等优秀儿童学习网站 */

/* 基础动画类 */
.fade-in {
    animation: fadeIn 0.8s ease-in;
}

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

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

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 波纹点击效果 */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple:after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.7) 10%, transparent 10%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform 0.5s, opacity 1s;
}

.ripple:active:after {
    transform: scale(0, 0);
    opacity: 0.3;
    transition: 0s;
}

/* 成功动画 */
.success-checkmark {
    width: 80px;
    height: 80px;
    margin: 0 auto;
}

/* 星星收集动画 */
@keyframes starCollect {
    0% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.5) rotate(180deg);
    }
    100% {
        transform: scale(0) rotate(360deg);
        opacity: 0;
    }
}

.star-collect {
    animation: starCollect 0.6s ease-out forwards;
}

/* 摇摆动画 */
@keyframes wiggle {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-10deg); }
    75% { transform: rotate(10deg); }
}

.wiggle:hover {
    animation: wiggle 0.5s ease-in-out;
}

/* 浮动动画 - 优化 */
@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
    }
    25% { 
        transform: translateY(-15px) rotate(2deg); 
    }
    50% { 
        transform: translateY(-20px) rotate(0deg); 
    }
    75% { 
        transform: translateY(-15px) rotate(-2deg); 
    }
}

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

/* 旋转进入 */
@keyframes rotateIn {
    from {
        transform: rotate(-180deg) scale(0);
        opacity: 0;
    }
    to {
        transform: rotate(0) scale(1);
        opacity: 1;
    }
}

.rotate-in {
    animation: rotateIn 0.6s ease-out;
}

/* 闪烁效果 */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

/* 进度条动画 */
@keyframes progressFill {
    from { width: 0%; }
    to { width: 100%; }
}

.progress-bar-fill {
    animation: progressFill 1s ease-out;
}

/* 卡片翻转 */
.flip-card {
    perspective: 1000px;
}

.flip-card-inner {
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

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

.flip-card-front, .flip-card-back {
    backface-visibility: hidden;
}

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

/* 音标口型动画 */
@keyframes mouthOpen {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(1.5); }
}

.mouth-animation {
    animation: mouthOpen 0.6s ease-in-out infinite;
}

/* 页面切换动画 */
.page-enter {
    animation: pageEnter 0.5s ease-out;
}

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

.page-exit {
    animation: pageExit 0.3s ease-in;
}

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

/* 新增：弹性动画 */
@keyframes elastic {
    0% { transform: scale(0); }
    55% { transform: scale(1.1); }
    75% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

.elastic {
    animation: elastic 0.5s ease-out;
}

/* 新增：脉冲光环 */
@keyframes pulseRing {
    0% {
        transform: scale(0.5);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

.pulse-ring::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    animation: pulseRing 1.5s ease-out infinite;
}

/* 新增：跳跃动画 */
@keyframes jump {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-30px); }
}

.jump {
    animation: jump 0.6s ease-in-out;
}

/* 新增：摇摆进入 */
@keyframes swingIn {
    0% {
        opacity: 0;
        transform: rotateX(-90deg);
    }
    50% {
        transform: rotateX(20deg);
    }
    100% {
        opacity: 1;
        transform: rotateX(0deg);
    }
}

.swing-in {
    animation: swingIn 0.8s ease-out;
}

/* 新增：颜色渐变动画 */
@keyframes colorShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.gradient-animate {
    background: linear-gradient(270deg, #667eea, #764ba2, #f093fb, #f5576c);
    background-size: 400% 400%;
    animation: colorShift 5s ease infinite;
}

/* 新增：星星雨动画 */
@keyframes starRain {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(500px) rotate(360deg);
        opacity: 0;
    }
}

.star-rain {
    position: fixed;
    font-size: 24px;
    animation: starRain 2s linear forwards;
    pointer-events: none;
    z-index: 1000;
}

/* 新增：缩放弹跳 */
@keyframes zoomBounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

.zoom-bounce {
    animation: zoomBounce 0.6s ease-out;
}

/* 新增：摇晃动画（错误提示） */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* 新增：淡出缩放 */
@keyframes fadeOutScale {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.5);
    }
}

.fade-out-scale {
    animation: fadeOutScale 0.3s ease-out forwards;
}

/* 新增：旋转缩放 */
@keyframes spinZoom {
    from {
        transform: rotate(0deg) scale(0);
    }
    to {
        transform: rotate(360deg) scale(1);
    }
}

.spin-zoom {
    animation: spinZoom 0.6s ease-out;
}

/* 新增：波浪动画 */
@keyframes wave {
    0%, 100% { transform: translateY(0); }
    25% { transform: translateY(-10px); }
    50% { transform: translateY(0); }
    75% { transform: translateY(10px); }
}

.wave:hover {
    animation: wave 0.6s ease-in-out;
}

/* 新增：滑动消除 */
@keyframes slideAway {
    to {
        transform: translateX(100px);
        opacity: 0;
    }
}

.slide-away {
    animation: slideAway 0.3s ease-out forwards;
}

/* 新增：心跳动画 */
@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    15% { transform: scale(1.1); }
    30% { transform: scale(1); }
    45% { transform: scale(1.1); }
    60% { transform: scale(1); }
}

.heartbeat {
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* 新增：闪光效果 */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.shimmer {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite linear;
}

/* 新增：弹跳进入 */
@keyframes bounceInDown {
    0% {
        opacity: 0;
        transform: translateY(-2000px);
    }
    60% {
        opacity: 1;
        transform: translateY(30px);
    }
    80% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0);
    }
}

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

/* 新增：翻滚进入 */
@keyframes rollIn {
    from {
        opacity: 0;
        transform: translateX(-100%) rotate(-120deg);
    }
    to {
        opacity: 1;
        transform: translateX(0) rotate(0deg);
    }
}

.roll-in {
    animation: rollIn 0.6s ease-out;
}

/* 新增：闪光圈 */
@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 5px rgba(74, 144, 226, 0.5); }
    50% { box-shadow: 0 0 20px rgba(74, 144, 226, 0.8), 0 0 30px rgba(74, 144, 226, 0.6); }
}

.glow-pulse {
    animation: glowPulse 2s ease-in-out infinite;
}