/* 
 * 动画效果样式文件
 * 参考Poppr网站风格
 */

/* ===== 页面加载动画 ===== */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-color);
    z-index: 9999;
    transform: translateY(100%);
    transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
}

.page-transition.active {
    transform: translateY(0);
}

.page-transition.exit {
    transform: translateY(-100%);
}

/* ===== 滚动显示动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-delay-1 {
    transition-delay: 0.2s;
}

.fade-in-delay-2 {
    transition-delay: 0.4s;
}

.fade-in-delay-3 {
    transition-delay: 0.6s;
}

/* ===== 图片悬停动画 ===== */
.hover-zoom {
    overflow: hidden;
}

.hover-zoom img {
    transition: transform 0.5s ease;
}

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

/* ===== 按钮悬停动画 ===== */
.btn-hover-effect {
    position: relative;
    overflow: hidden;
}

.btn-hover-effect::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s ease;
    z-index: -1;
}

.btn-hover-effect:hover::before {
    left: 0;
}

/* ===== 文字渐变动画 ===== */
.text-gradient {
    background: linear-gradient(90deg, var(--primary-color), var(--dark-gray));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient 3s linear infinite;
}

@keyframes gradient {
    0% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
    100% {
        background-position: 0% center;
    }
}

/* ===== 导航菜单动画 ===== */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 768px) {
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--secondary-color);
        padding: 100px var(--spacing-lg);
        transition: right 0.5s ease;
        z-index: 999;
    }
    
    nav.active {
        right: 0;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin: var(--spacing-md) 0;
    }
    
    .menu-toggle {
        display: flex;
        z-index: 1000;
    }
}

/* ===== 图片滑入动画 ===== */
.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 图片放大动画 ===== */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 滚动进度条 ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* ===== 鼠标跟随效果 ===== */
.cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.2);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9999;
    transition: width 0.3s, height 0.3s, background-color 0.3s;
}

.cursor.active {
    width: 50px;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.1);
}

/* ===== 图库过滤动画 ===== */
.gallery-item {
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.gallery-item.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

/* ===== 页面切换动画 ===== */
.page-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* ===== 图片懒加载动画 ===== */
.lazy-load {
    opacity: 0;
    transition: opacity 1s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* ===== 文字打字机效果 ===== */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    margin: 0 auto;
    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: var(--primary-color);
    }
}

/* ===== 图片视差效果 ===== */
.parallax {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* ===== 滚动指示器动画 ===== */
.scroll-indicator svg {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

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

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

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

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

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