/* 动画效果 */

/* 淡入效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 文字显示效果 */
.reveal-text {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    transition-delay: calc(var(--index, 0) * 0.1s);
}

.reveal-text.active {
    opacity: 1;
    transform: translateY(0);
}

/* 元素显示效果 */
.reveal-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    transition-delay: calc(var(--index, 0) * 0.15s);
}

.reveal-element.active {
    opacity: 1;
    transform: translateY(0);
}

/* 从左侧进入 */
.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 从右侧进入 */
.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 缩放效果 */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 旋转进入 */
.rotate-in {
    opacity: 0;
    transform: rotate(-5deg) scale(0.95);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.rotate-in.active {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* 视差滚动效果 */
.parallax-section {
    position: relative;
    overflow: hidden;
}

.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 120%;
    background-size: cover;
    background-position: center;
    transform: translateY(0);
    will-change: transform;
}

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

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

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

/* 文字渐变动画 */
.text-gradient {
    background: linear-gradient(90deg, #000, #555, #000);
    background-size: 200% auto;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    animation: gradient 8s linear infinite;
}

@keyframes gradient {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 200% center;
    }
}

/* 打字机效果 */
.typewriter {
    overflow: hidden;
    border-right: 2px solid #000;
    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: #000 }
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

/* 鼠标悬停链接效果 */
.hover-underline {
    position: relative;
    display: inline-block;
}

.hover-underline::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: currentColor;
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.hover-underline:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* 按钮悬停效果 */
.btn-hover-effect {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-hover-effect::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.3s ease;
    z-index: -1;
}

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

/* 3D卡片效果 */
.card-3d {
    transition: transform 0.5s ease;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card-3d:hover {
    transform: rotateY(5deg) rotateX(5deg);
}

/* 图标旋转 */
.icon-rotate {
    transition: transform 0.3s ease;
}

.icon-rotate:hover {
    transform: rotate(90deg);
}

/* 脉冲动画 */
.pulse {
    animation: pulse-animation 2s infinite;
}

@keyframes pulse-animation {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 113, 227, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 113, 227, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 113, 227, 0);
    }
}

/* 浮动动画 */
.float {
    animation: float-animation 3s ease-in-out infinite;
}

@keyframes float-animation {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 闪光效果 */
.shine {
    position: relative;
    overflow: hidden;
}

.shine::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    transform: rotate(30deg);
    animation: shine-animation 3s infinite;
}

@keyframes shine-animation {
    0% {
        transform: rotate(30deg) translateX(-300%);
    }
    100% {
        transform: rotate(30deg) translateX(300%);
    }
}

/* 加载动画 */
.loading-dots {
    display: inline-flex;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    margin: 0 4px;
    border-radius: 50%;
    background-color: currentColor;
    opacity: 0.3;
    animation: loading-dots 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loading-dots {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}