/* 动画效果库 */

/* 淡入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 向上淡入动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 向下淡入动画 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 向左淡入动画 */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 向右淡入动画 */
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 缩放动画 */
@keyframes scale {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* 脉冲动画 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

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

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

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

/* 跳跃动画 */
@keyframes jump {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* 波浪动画 */
@keyframes wave {
    0% {
        transform: translateY(0);
    }
    25% {
        transform: translateY(-5px);
    }
    50% {
        transform: translateY(0);
    }
    75% {
        transform: translateY(5px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 淡入缩放动画 */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 翻转动画 */
@keyframes flip {
    from {
        transform: perspective(400px) rotateY(90deg);
        opacity: 0;
    }
    to {
        transform: perspective(400px) rotateY(0deg);
        opacity: 1;
    }
}

/* 3D翻转动画 */
@keyframes flip3D {
    0% {
        transform: perspective(400px) rotateX(90deg);
        opacity: 0;
    }
    100% {
        transform: perspective(400px) rotateX(0deg);
        opacity: 1;
    }
}

/* 导航栏动画 */
.navbar {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 20px 30px;
    transition: all 0.5s ease;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar.scrolled {
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    padding: 10px 30px;
}

.navbar.scrolled .nav-links a {
    color: #333;
}

.logo h1 {
    color: white;
    margin: 0;
    font-size: 1.8rem;
    transition: all 0.3s ease;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.navbar.scrolled .logo h1 {
    color: #333;
    text-shadow: none;
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin: 0 15px;
}

.nav-links a {
    text-decoration: none;
    color: white;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.nav-links a:hover {
    color: #2ecc71;
}

.nav-links a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: #2ecc71;
    bottom: 0;
    left: 0;
    transition: width 0.3s ease;
}

.nav-links a:hover:after, .nav-links a.active:after {
    width: 100%;
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px;
    transition: all 0.3s ease;
}

.navbar.scrolled .burger div {
    background-color: #333;
}

/* 响应式导航 */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: 92vh;
        top: 8vh;
        background-color: white;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links li {
        opacity: 0;
        margin: 20px 0;
    }

    .nav-links a {
        color: #333;
    }

    .burger {
        display: block;
    }

    .nav-active {
        transform: translateX(0);
    }

    /* 汉堡菜单动画 */
    .toggle .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .toggle .line2 {
        opacity: 0;
    }

    .toggle .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
    }
}

@keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 滚动动画类 */
.scroll-animation {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

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

/* 计数器动画 */
.count-animation {
    animation: countUp 2.5s ease-out forwards;
}

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

/* 页面加载动画 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #2ecc71;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* 卡片悬停效果 */
.hover-card {
    transition: all 0.3s ease;
    cursor: pointer;
}

.hover-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 图片悬停效果 */
.image-hover {
    overflow: hidden;
}

.image-hover img {
    transition: all 0.5s ease;
}

.image-hover:hover img {
    transform: scale(1.1);
}

/* 按钮动画 */
.animate-btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.animate-btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.5s ease;
}

.animate-btn:hover:before {
    left: 100%;
}

/* 进入视口动画 */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 时间轴动画 */
.timeline-item {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease;
}

.timeline-item.appear {
    opacity: 1;
    transform: translateX(0);
}

/* 打字机效果 */
.typewriter h1 {
    overflow: hidden;
    border-right: 2px solid #2ecc71;
    white-space: nowrap;
    margin: 0 auto;
    letter-spacing: 0.15em;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

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

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: #2ecc71 }
}